CN112283952B - Flow limiting device and gas water heater with same - Google Patents

Abstract

The invention discloses a sleeve flow-limiting device and a gas water heater with the same, wherein the sleeve flow-limiting device comprises: the sleeve assembly comprises an inner pipe and an outer pipe sleeved on the outer side of the inner pipe, an air inlet channel is formed between the outer wall of the inner pipe and the inner wall of the outer pipe, and the air inlet channel is provided with a restriction orifice; the flow limiting plate is arranged at the position of the flow limiting opening and used for adjusting the opening of the flow limiting opening; the driving piece is connected with the flow limiting plate and used for driving the flow limiting plate to move so as to adjust the opening of the flow limiting opening. According to the flow limiting device, the flow limiting plate is arranged for adjusting the opening of the flow limiting opening of the air inlet channel, so that the air inlet flow of air can be changed, the automatic control of the air inlet flow is realized, and the effect of self-adapting to environmental change is achieved.

Description

Flow limiting device and gas water heater with same

Technical Field

The invention relates to a flow limiting device and a gas water heater with the same.

Background

With the improvement of living standard and the gradual perfection of gas supply facilities, household rapid gas water heaters are increasingly popular, and people in the industry are increasingly receiving attention to provide comfortable and safe bath environments for consumers. However, the environment is variable, and how to adapt the water heater to the variable environment is a research hot spot for the industry.

Disclosure of Invention

The present application has been made based on the findings of the inventors of the present application regarding the following facts and problems:

the inventor of the application finds that in the research process, the section of an air inlet of a smoke tube of a gas water heater (balance type) in the prior art is fixed, the air quantity cannot be regulated, and the problems of abnormal combustion and excessive noise are easy to occur under the condition of different smoke tube lengths. The self-adaptive flow-limiting ring scheme is provided, the section of the air inlet of the smoke tube is automatically adjusted according to the change of external wind pressure, and the problems of abnormal combustion and noise are solved

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application aims to provide a flow limiting device which can effectively adjust the air quantity of an air inlet channel and improve the problems of abnormal combustion and noise.

The application also provides a gas water heater with the flow limiting device.

The current limiting device according to the first aspect of the present application includes: the sleeve assembly comprises an inner pipe and an outer pipe sleeved on the outer side of the inner pipe, an air inlet channel is formed between the outer wall of the inner pipe and the inner wall of the outer pipe, and the air inlet channel is provided with a restriction orifice; the flow limiting plate is arranged at the position of the flow limiting opening and used for adjusting the opening of the flow limiting opening; the driving piece is connected with the flow limiting plate and used for driving the flow limiting plate to move so as to adjust the opening of the flow limiting opening.

According to the flow limiting device, the flow limiting plate is arranged for adjusting the opening of the flow limiting opening of the air inlet channel, so that the air inlet flow of air can be changed, the automatic control of the air inlet flow is realized, and the effect of self-adapting to environmental change is achieved.

In some embodiments, the restrictor plate includes a plurality of restrictor plates disposed about a central axis of the restrictor orifice.

In some embodiments, the plurality of restrictor plates includes a first restrictor plate and a second restrictor plate, the driver is coupled to the first restrictor plate for driving the first restrictor plate to be pivotable about a first axis, and the driver is coupled to the second restrictor plate for driving the second restrictor plate to be pivotable about a second axis.

In some embodiments, the first axis is parallel to a central axis of the restriction, and the second axis is parallel to the central axis of the restriction.

In some embodiments, the driver comprises: the first driving piece is in transmission connection with the first current limiting plate, and the second driving piece is in transmission connection with the second current limiting plate.

In some embodiments, the first driving member has a first driving rod movable along its length, the free end of the first driving rod being connected to the first restrictor plate; the second driving piece is provided with a second driving rod, the second driving rod is movable along the length direction of the second driving rod, and the free end of the second driving rod is connected with the second current limiting plate.

In some embodiments, the driver further comprises: the two ends of the first connecting rod are respectively hinged with the free end of the first driving rod and the first current limiting plate; and two ends of the second connecting rod are hinged with the free end of the second driving rod and the second current limiting plate respectively.

In some embodiments, at least one of the first and second drivers is a solenoid valve.

In some embodiments, the restrictor plate is movable between a first position where the restrictor opening is greatest and a second position where the restrictor opening is smallest, the restrictor device further comprising: the resetting piece is connected with the current limiting plate and drives the current limiting plate to move to the first position or the second position.

In some embodiments, the restrictor plate comprises a first restrictor plate and a second restrictor plate, the first restrictor plate and the second restrictor plate disposed about a central axis of the restrictor orifice, the first restrictor plate having first and second ends opposite in a circumferential direction of the restrictor orifice, the first restrictor plate being pivotable about a first axis at the first end, the reset member being connected to the second end; the second flow limiting plate is provided with a third end and a fourth end which are opposite in the circumferential direction of the flow limiting port, the second flow limiting plate is pivotable around a second axis positioned at the third end, and the reset piece is connected with the fourth end.

In some embodiments, the first end of the first restrictor plate is adjacent to and disposed side-by-side with the third end of the second restrictor plate.

In some embodiments, the second end of the first current limiting plate is provided with a first connecting hole, the fourth end of the second current limiting plate is provided with a second connecting hole, the reset piece comprises a first reset spring and a second reset spring, one end of the first reset spring is fixed and the other end of the first reset spring is hooked on the first connecting hole, and one end of the second reset spring is fixed and the other end of the second reset spring is hooked on the second connecting hole.

The gas water heater according to the second aspect of the present invention comprises: a bottom case; according to the flow limiting device of the first aspect of the invention, the inner pipe is a smoke exhaust pipe, the outer pipe is an air inlet pipe, and the flow limiting plate is movably arranged on the bottom shell.

According to the gas water heater, the flow limiting plate is arranged for adjusting the opening of the flow limiting opening of the air inlet channel, so that the air inlet flow rate of air can be changed, the combustion condition of a combustion system is improved, the system noise is reduced, and the service performance is improved.

In some embodiments, the restrictor plate comprises a first restrictor plate and a second restrictor plate disposed in sequence about a central axis of the restrictor orifice; the bottom shell is provided with a first fixed shaft and a second fixed shaft, the first current limiting plate is rotatably connected with the first fixed shaft, and the second current limiting plate is rotatably connected with the second fixed shaft.

In some embodiments, the first flow limiting plate is provided with a first limit groove, the first limit groove extends from the outer periphery of the first flow limiting plate to the inner periphery, the bottom shell is provided with a first limit post, the first limit post is slidably arranged in the first limit groove, and the first limit post is abutted against the closed end of the first limit groove when the opening of the first flow limiting plate is maximum; the second limiting plate is provided with a second limiting groove, the second limiting groove extends from the outer periphery of the second limiting plate to the inner periphery, the bottom shell is provided with a second limiting column, the second limiting column is slidably arranged in the second limiting groove, and the second limiting plate is stopped against the closed end of the second limiting groove when the opening of the limiting opening is maximum.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic view of a gas water heater according to a first embodiment of the present invention, wherein an opening of a restriction plate is larger;

FIG. 2 is a schematic view of the gas water heater shown in FIG. 1, wherein the restrictor plate has a minimum opening to open the restrictor orifice;

FIG. 3 is a schematic view of a gas water heater according to a second embodiment of the present invention, wherein an opening of a restriction plate is smaller;

fig. 4 is a schematic view of the gas water heater shown in fig. 1, in which the restriction plate opens the restriction orifice to a large degree.

Reference numerals:

the gas water heater 100 is provided with a water heater,

a bottom shell 1, a first fixed shaft 11, a second fixed shaft 12, a third fixed shaft 13, a first limit post 14, a second limit post 15,

the flow-limiting device 2 is provided with a flow-limiting means,

the sleeve assembly 21, the inner tube 211, the outer tube 212, the restriction 213,

the flow restrictor plate 22,

the first flow limiting plate 221, the first end 2211, the second end 2212, the first connection hole 2213, the first limiting groove 2214,

the second flow-limiting plate 222, the third end 2221, the fourth end 2222, the second connection hole 2223, the second limiting groove 2224,

the driving member 23, the driving rod 2301, the first driving member 231, the first driving rod 2311, the second driving member 232, the second driving rod 2321, the first connection rod 233, the second connection rod 234,

the return member 24, the first return spring 241, the second return spring 242,

the driving member 25, the lever 251, the driving connection end 2511, the driven connection end 2512, the first sliding slot 2513, the second sliding slot 2514, the connection hole 2515, the first link 252 and the second link 253.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

First, a gas water heater 100 according to an embodiment of the second aspect of the present invention will be briefly described, the gas water heater 100 including a bottom case 1, a smoke discharge pipe 211, an air intake pipe 212, a flow restriction plate 22, and a driving member 23, wherein the smoke discharge pipe 211, the air intake pipe 212, the flow restriction plate 22, and the driving member 23 constitute a flow restriction device 2 according to an embodiment of the first aspect of the present invention.

Specifically, the air inlet pipe 212, the smoke exhaust pipe 211, the driving piece 23 and the flow limiting plate 22 are all arranged on the bottom shell 1, the air inlet pipe 212 is sleeved on the outer side of the smoke exhaust pipe 211, an air inlet channel is defined between the air inlet pipe 212 and the smoke exhaust pipe 211, and the air inlet channel is provided with a flow limiting port 213. The flow limiting plate 22 is movably arranged at the position of the flow limiting opening 213, the flow limiting plate 22 is used for adjusting the opening of the flow limiting opening 213, the driving piece 23 is connected with the flow limiting plate 22, and the driving piece 23 is used for driving the flow limiting plate 22 to move so as to adjust the opening of the flow limiting opening 213. Wherein, "the restrictor plate 22 is used to adjust the opening of the restrictor 213" means: the restrictor plate 22 may adjust the cross-sectional flow area of the restrictor orifice 213, e.g., the restrictor plate 22 may fully open the restrictor orifice 213 or fully close the restrictor orifice 213, and the restrictor plate 22 may also be maintained in any position between the fully open restrictor orifice 213 and the fully closed restrictor orifice 213. Of course, the opening range of the restriction opening 213 regulated by the restriction plate 22 may be smaller than 0-100%, and the user may set the adjustable range of the restriction plate 22 according to actual needs.

The gas water heater 100 may further include a controller, where the controller may adjust the opening of the restriction orifice 213 according to the wind pressure of the external environment, specifically, when the external wind pressure changes, the controller may receive a variable signal of the wind pressure change, compare the variable signal with a reference value, determine an output value, and adjust the opening of the restriction plate 22 according to the variable signal, thereby changing the intake air flow of air, so as to improve the combustion condition, system noise and usability of the combustion system, and achieve the effect of self-adapting to the environmental change.

According to the gas water heater 100 of the embodiment of the invention, the flow limiting plate 22 is arranged for adjusting the opening of the flow limiting opening 213 of the air inlet channel, so that the air inlet flow rate of air can be changed, the combustion condition of a combustion system can be improved, the system noise can be reduced, and the service performance can be improved.

A flow restriction device 2 according to an embodiment of the first aspect of the invention is described below with reference to fig. 1-2.

As shown in fig. 1, a current limiting device 2 according to an embodiment of the first aspect of the present invention includes: a sleeve assembly 21, a restrictor plate 22 and a driver 23.

Specifically, the sleeve assembly 21 includes an inner tube 211 and an outer tube 212, the outer tube 212 is sleeved outside the inner tube 211, an air intake passage is formed between the outer wall of the inner tube 211 and the inner wall of the outer tube 212, and the air intake passage has a restriction 213; for example, the inner tube 211 and the outer tube 212 are each circular in cross section, and an intake passage having an annular cross section is defined between the inner tube 211 and the outer tube 212. The flow limiting plate 22 is arranged at the position of the flow limiting opening 213 and used for adjusting the opening of the flow limiting opening 213; the driving member 23 is connected to the restriction plate 22 for driving the movement of the restriction plate 22 to adjust the opening of the restriction opening 213. The restriction 213 is disposed parallel to the cross section of the intake passage, and for example, the restriction 213 may be formed directly in any cross section of the intake passage along the length direction.

According to the flow limiting device 2 of the embodiment of the invention, the flow limiting plate 22 is arranged for adjusting the opening of the air inlet channel flow limiting opening 213, so that the air inlet flow can be changed, the automatic control of the air inlet flow is realized, and the effect of self-adapting to environmental change is achieved.

In one embodiment of the present invention, as shown in FIG. 1, the restrictor plate 22 may comprise a plurality of restrictor plates 22 disposed about the central axis of the restrictor orifice 213. Because the cross section of the air inlet channel is annular, and the shape of the restriction opening 213 is also annular, the embodiment can conveniently drive the restriction opening 22 to adjust the opening of the restriction opening 213 by arranging a plurality of restriction plates 22, so that the structure is simple and reasonable. For example, referring to fig. 1, the number of the flow limiting plates 22 is plural, the plurality of flow limiting plates 22 are disposed at intervals around the central axis of the flow limiting opening 213, and the plurality of flow limiting plates 22 are disposed parallel to the flow limiting opening 213, so that the flow limiting plates 22 can cover the flow section of the flow limiting opening 213, thereby achieving the effect of adjusting the opening of the flow limiting opening 213. Further, when the restrictor plate 22 completely closes the restrictor orifice 213, the restrictor plates 22 may be annular end to end.

In some embodiments, as shown in fig. 1, the plurality of restrictor plates 22 may include: a first restrictor plate 221 and a second restrictor plate 222, the driver 23 being coupled to the first restrictor plate 221 for driving the first restrictor plate 221 to be pivotable about a first axis (e.g., the central axis of the first stationary shaft 11 shown in fig. 1), and the driver 23 being coupled to the second restrictor plate 222 for driving the second restrictor plate 222 to be pivotable about a second axis (e.g., the central axis of the second stationary shaft 12 shown in fig. 1). Thus, the area of the restriction opening 213 blocked by the first restriction plate 221 can be adjusted by pivoting the first restriction plate 221 around the first axis, and the area of the restriction opening 213 blocked by the second restriction plate 222 can be adjusted by pivoting the second restriction plate 222 around the second axis, so that the opening of the restriction opening 213 can be adjusted by rotating the first restriction plate 221 and/or the second restriction plate 222, and the operation is simple and convenient.

Wherein, the first and second flow limiting plates 221 and 222 may each be formed in a generally semicircular shape.

In some examples, as shown in fig. 1, the first axis may be parallel to the central axis of the restriction 213, such that when the first flow limiting plate 221 rotates around the first axis, the first flow limiting plate 221 may rotate in a plane in which the restriction 213 is located, and simultaneously, the second axis may be parallel to the central axis of the restriction 213, and when the second flow limiting plate 222 rotates around the second axis, the second flow limiting plate 222 may also rotate in a plane in which the restriction is located, thereby, stability of the first flow limiting plate 221 and the second flow limiting plate 222 during rotation may be improved, and occupation space of the first flow limiting plate 221 and the second flow limiting plate 222 may also be reduced, and the structure may be more compact.

According to some embodiments of the present invention, as shown in fig. 1, a first fixing shaft 11 and a second fixing shaft 12 may be provided on the bottom case 1, a first flow restricting plate 221 is rotatably connected to the first fixing shaft 11, and a second flow restricting plate 222 is rotatably connected to the second fixing shaft 12. Specifically, as shown in fig. 1, the first flow limiting plate 221 is provided with a first shaft hole having an axis coincident with the first axis, the bottom case 1 is formed with a first fixed shaft 11 adapted to be rotatably connected to the first shaft hole, the second flow limiting plate 222 is provided with a second shaft hole having an axis coincident with the second axis, and the bottom case 1 is provided with a second fixed shaft 12 adapted to be rotatably connected to the second shaft hole, whereby the first flow limiting plate 221 and the second flow limiting plate 222 can be conveniently rotatably fixed to the bottom case 1. Wherein, alternatively, the first shaft hole may be provided at one end of the first flow restricting plate 221 in the circumferential direction of the flow restricting port 213 (e.g., the upper end of the first flow restricting plate shown in fig. 1), and the second shaft hole may be provided at one end of the second flow restricting plate 222 in the circumferential direction of the flow restricting port 213 (e.g., the upper end of the second flow restricting plate shown in fig. 1). Therefore, the rotation axis of the flow limiting plate is arranged at the end part of the flow limiting plate, so that the flow section of the flow limiting opening can be quickly opened or closed when the flow limiting plate is rotated, and the adjustment efficiency of the opening of the flow limiting opening 213 is improved.

Further, at least one of the first and second fixing shafts 11 and 12 may be a rotation pin, and the rotation pin is screw-coupled with the bottom chassis 1. Specifically, a first threaded hole and a second threaded hole are formed in the bottom shell 1 at intervals, a first rotating pin is connected in the first threaded hole in a threaded mode, a first shaft hole is formed in the first current limiting plate 221, and the first current limiting plate 221 is connected with the first rotating pin through the first shaft hole and is rotatable relative to the first rotating pin. The second threaded hole is internally and in threaded connection with a second rotating pin, a second shaft hole is formed in the second current limiting plate 222, and the second current limiting plate 222 is connected with the second rotating pin through the second shaft hole and can rotate relative to the second rotating pin.

In some embodiments of the invention, as shown in fig. 1, a first limiting groove 2214 is formed on the first current limiting plate 221, the first limiting groove 2214 extends from the outer periphery of the first current limiting plate 221 towards the inner periphery, specifically, the first limiting groove 2214 extends from the outer periphery of the first current limiting plate towards the inner periphery of the first current limiting plate 221 along a circular arc line taking the first fixed shaft 11 as a center, a first limiting column 14 is formed on the bottom shell 1, the first limiting column 14 is slidably arranged in the first limiting groove 2214, and the first limiting column 14 is stopped against the closed end of the first limiting groove 2214 when the opening of the opening limiting port 213 is maximum; therefore, the maximum opening of the first flow limiting plate 221, which is adjusted to the flow limiting opening 213, can be limited by the limit fit of the first limit groove 2214 and the first limit post 14, so as to avoid the first flow limiting plate 221 from slipping.

Meanwhile, the second current limiting plate 222 is provided with a second limit groove 2224, the second limit groove 2224 extends from the outer periphery of the second current limiting plate 222 towards the inner periphery, specifically, the second limit groove 2224 extends from the outer periphery of the second current limiting plate towards the inner periphery of the second current limiting plate 222 along a circular arc line taking the second fixed shaft 12 as a center, the bottom shell 1 is provided with a second limit column 15, the second limit column 15 is slidably arranged in the second limit groove 2224, and the second limit column 15 is stopped against the closed end of the second limit groove 2224 when the opening of the open limit port 213 is maximum. Therefore, the maximum opening of the second flow limiting plate 222, which is adjusted to the flow limiting opening 213, can be limited by the limit fit of the second limit groove 2224 and the second limit post 15, so as to avoid the second flow limiting plate 222 from slipping.

In some embodiments according to the present invention, as shown in fig. 1 and 2, the driving member 23 may include: the first driving piece 231 and the second driving piece 232, the first driving piece 231 is in transmission connection with the first current limiting plate 221, and the second driving piece 232 is in transmission connection with the second current limiting plate 222. That is, the first and second current limiting plates 221 and 222 may be driven by the first and second driving members 231 and 232, respectively, and thus, it is possible to conveniently control the first and second current limiting plates 221 and 222 independently.

In some embodiments, as shown in fig. 1, the first driving member 231 has a first driving lever 2311, the first driving lever 2311 being movable along a length direction thereof, a free end of the first driving lever 2311 being coupled to the first current limiting plate 221, wherein a coupling position of the first driving lever 2311 to the first current limiting plate 221 is spaced apart from the first axis; thus, when the first driving lever 2311 moves in the length direction thereof, the first flow limiting plate 221 may be pulled to rotate about the first axis to adjust the opening degree of the flow limiting port 213.

Here, since the linear motion of the first driving rod 2311 needs to be converted into the rotation of the first current limiting plate 221, the free end of the first driving rod 2311 is movably connected with the first current limiting plate 221. For example, in one specific example, the driving member 23 may further include: the first connection rod 233, both ends of the first connection rod 233 are hinged with the free end of the first driving rod 2311 and the first current limiting plate 221, respectively; that is, one end of the first connection lever 233 is hinged with the first driving lever 2311 and the other end is hinged with the first current limiting plate 221. Thereby, the first connection lever 233 may convert the linear motion of the first driving lever 2311 into the swing of the first current limiting plate 221.

In some embodiments, as shown in fig. 1, the second driving member 232 has a second driving rod 2321, the second driving rod 2321 being movable along its length, and a free end of the second driving rod 2321 being connected to the second flow-restricting plate 222. Wherein, the connection position of the second driving rod 2321 and the second current limiting plate 222 is spaced from the second axis; thus, when the second driving rod 2321 moves along the length direction thereof, the second restrictor plate 222 may be pulled to rotate around the second axis to adjust the opening of the restrictor 213.

Here, since the linear motion of the second driving rod 2321 needs to be converted into the rotation of the second current-limiting plate 222, the free end of the second driving rod 2321 is movably connected with the second current-limiting plate 222. For example, in one specific example, the driving member 23 may further include: the second connecting rod 234, two ends of the second connecting rod 234 are respectively hinged with the free end of the second driving rod 2321 and the second current limiting plate 222; that is, one end of the second connection link 234 is hinged with the second driving lever 2321 and the other end is hinged with the second restrictor plate 222. Thus, the second connection link 234 may convert the linear motion of the second driving lever 2321 into the rotation or swing of the second flow restriction plate 222.

According to some embodiments of the invention, as shown in fig. 1, at least one of the first driving member 231 and the second driving member 232 is a solenoid valve. That is, only the first driver 231 may be an electromagnetic valve, only the second driver 232 may be an electromagnetic valve, and both the first driver 231 and the second driver 232 may be electromagnetic valves. Therefore, the structure of the driving member 23 can be simplified, and the moving distance of the driving rod can be controlled by the current, so that the opening degree of the restriction opening 213 can be adjusted, and the control accuracy can be improved.

According to some embodiments of the present invention, as shown in fig. 1 and 2, the flow restriction plate 22 is movable between a first position where the opening of the open flow restriction 213 is largest and a second position where the opening of the open flow restriction 213 is smallest (refer to the position of the flow restriction plate 22 shown in fig. 2), and the flow restriction device 2 may further include: and the reset piece 24, the reset piece 24 is connected with the current limiting plate 22, and the reset piece 24 always drives the current limiting plate 22 to move to the first position or the second position. In other words, one of the first position and the second position is a reset position, and the reset member 24 often drives the current-limiting plate 22 to move to the reset position, that is, the reset member 24 often has a force to drive the current-limiting plate 22 to move to the reset position, so as to facilitate resetting of the current-limiting plate 22. For example, referring to fig. 2, the reset member 24 normally drives the first restrictor plate 221 and the second restrictor plate 222 to rotate to the second position where the opening of the open restrictor 213 is minimal.

In some embodiments, as shown in fig. 1, the restrictor plate 22 includes a first restrictor plate 221 and a second restrictor plate 222, the first restrictor plate 221 and the second restrictor plate 222 being disposed about a central axis of the restrictor orifice 213, the first restrictor plate 221 having a first end 2211 and a second end 2212 opposite in a circumferential direction of the restrictor orifice 213, the first restrictor plate 221 being pivotable about a first axis at the first end 2211, the return 24 being connected to the second end 2212; the first driver 231 is connected between a first end 2211 and a second end 2212 of the first restrictor plate 221. Further, the second flow restricting plate 222 has a third end 2221 and a fourth end 2222 opposite in the circumferential direction of the flow restricting orifice 213, the second flow restricting plate 222 is pivotable about a second axis located at the third end 2221, the reset member 24 is connected to the fourth end 2222, and the second driving member 232 is connected between the third end 2221 and the fourth end 2222 of the second flow restricting plate 222. Therefore, the structure is compact and reasonable.

In some examples, as shown in fig. 1, the first end 2211 of the first restrictor plate 221 is disposed adjacent and side-by-side to the third end 2221 of the second restrictor plate 222, such that the first and second axes may be disposed adjacent and side-by-side, and further, the first restrictor plate 221 and the second restrictor plate 222 are symmetrically disposed about one of the centerlines of the restrictor orifice 213 (e.g., the vertical centerline of the restrictor orifice 213 shown in fig. 1).

In some examples, the second end 2212 of the first flow limiting plate 221 is provided with a first connection hole 2213, the fourth end 2222 of the second flow limiting plate 222 is provided with a second connection hole 2223, the reset member 24 may include a first reset spring 241 and a second reset spring 242, one end of the first reset spring 241 (for example, a lower end of the first reset spring 241 shown in fig. 1) may be fixed, for example, a first mounting hole (not shown) may be provided on the bottom case 1, the one end of the first reset spring 241 may be rotatably connected to the first mounting hole, and the other end of the first reset spring 241 (for example, an upper end of the first reset spring 241 shown in fig. 1) may be hooked to the first connection hole 2213, one end of the second reset spring 242 (for example, a lower end of the second reset spring 242 shown in fig. 1) may be fixed, for example, a second mounting hole (not shown) may be provided on the bottom case 1, the one end of the second reset spring 242 may be rotatably provided in the second mounting hole, and the other end of the second reset spring 242 (for example, a second upper end of the second reset spring 242 shown in fig. 1) may be hooked to the second connection hole 2223).

According to some embodiments of the present invention, as shown in fig. 3 and 4, the current limiting device 2 may further include: the driving member 25, the driving member 25 has a driving connection end 2511 and a driven connection end 2512, the driving member 23 is connected with the driving connection end 2511 of the driving member 25, and the driven connection end 2512 is connected with the current limiting plate 22; the driving member 23 drives the flow limiting plate 22 to move through the transmission member 25 to adjust the opening degree of the flow limiting orifice 213. Wherein the driving member 23 may be a solenoid valve.

In one particular embodiment, as shown in fig. 3, the transmission member 25 may include: the lever 251, the lever 251 has a driving connection end 2511, a driven connection end 2512, and a fulcrum between the driving connection end 2511 and the driven connection end 2512, about which the lever 251 is rotatable. Specifically, one end of the lever 251 (e.g., the right end of the lever 251 shown in fig. 3) is formed as a driving connection end 2511, the driving connection end 2511 is for connection with the driving member 23, the other end of the lever 251 is formed as a driven connection end 2512, the driven connection end 2512 is for connection with the current limiting plate 22, the fulcrum of the lever 251 is formed as a third shaft hole, the bottom case 1 is provided with a third fixing shaft 13, the lever 251 is rotatably connected with the third fixing shaft 13 through the third shaft hole, and at this time, the third shaft hole is a fulcrum of the lever 251 for fixing the lever 251 and making the lever 251 rotatable around the position. In this embodiment, the driving member 25 is set to the lever 251, and the position of the fulcrum is reasonably set, so that the driving connection end 2511 moves at a smaller position to realize larger displacement of the driven connection end 2512, so that the driving efficiency of the current limiting plate 22 is improved, and meanwhile, the current limiting plate 22 can be driven by applying smaller force, so that the force and moment are saved.

In some examples, as shown in fig. 3, the flow-limiting plate 22 includes a first flow-limiting plate 221 and a second flow-limiting plate 222, where the first flow-limiting plate 221 and the second flow-limiting plate 222 are disposed around a central axis of the flow-limiting port 213, for example, the first flow-limiting plate 221 and the second flow-limiting plate 222 are disposed around the central axis of the flow-limiting port 213 in sequence, and the transmission member 25 may further include: a first link 252 and a second link 253, both ends of the first link 252 are connected to the lever 251 and the first restrictor plate 221, respectively, and both ends of the second link 253 are connected to the lever 251 and the second restrictor plate 222, respectively. Thus, the lever 251 can simultaneously drive the first and second restrictor plates 221 and 222 through the first and second links 252 and 253, respectively, thereby reducing the number of driving pieces 23 and improving driving efficiency.

Further, as shown in fig. 4, the driven connection end 2512 of the lever 251 may be formed with a first sliding slot 2513, one end of the first link 252 (e.g., the right end of the first link 252 shown in fig. 4) being slidably provided in the first sliding slot 2513, the other end of the first link 252 (e.g., the left end of the first link 252 shown in fig. 4) being hinged with the first restrictor plate 221; in this way, the first link 252 may translate (approximately move) the oscillation of the driven link 2512 into an oscillation of the first restrictor plate 221 about the first axis. One end of the second link 253 (e.g., the left end of the second link 253 shown in fig. 4) is slidably provided in the first sliding slot 2513, and the other end of the second link 253 (e.g., the right end of the second link 253 shown in fig. 4) is hinged with the second restrictor plate 222. In this way, the second link 253 can translate movement from the driven connection end of the lever 251 into oscillation of the second restrictor plate 222 about the second axis.

Further, as shown in fig. 4, one end of the first link 252 (e.g., the right end of the first link 252 shown in fig. 4) is hinged with one end of the second link 253 (e.g., the left end of the second link 253 shown in fig. 4). For example, after the first link 252 and the second link 253 are hinged, the hinged ends of the first link 252 and the second link 253 are slidably disposed in the first sliding groove 2513 of the lever 251. Thereby, it can be ensured that the lever 251 can drive the first link 252 and the second link 253 simultaneously.

In some embodiments of the present invention, as shown in fig. 3, the driving link end 2511 may be formed with a second sliding groove 2514, the driving member 23 may have a driving rod 2301, the free end of the driving rod 2301 may be slidably disposed in the second sliding groove 2514, and the driving rod 2301 may be movable in its own axis direction. Thus, when the driving rod 2301 is moved in the length direction thereof, the driving connection end 2511 of the lever 251 can be pulled to swing around the fulcrum to adjust the opening degree of the restriction port 213 by the lever 251.

According to some embodiments of the present invention, as shown in fig. 3 and 4, the flow restriction plate 22 is movable between a first position (referring to the position of the flow restriction plate 22 shown in fig. 4) where the opening of the open flow restriction 213 is maximum and a second position (referring to the position of the flow restriction plate 22 shown in fig. 3) where the opening of the open flow restriction 213 is minimum, the flow restriction device 2 may further include: and the reset piece 24, the reset piece 24 is connected with the current limiting plate 22, and the reset piece 24 always drives the current limiting plate 22 to move to the first position or the second position. In other words, one of the first position and the second position is a reset position, and the reset member 24 often drives the current-limiting plate 22 to move to the reset position, that is, the reset member 24 often has a force to drive the current-limiting plate 22 to move to the reset position, so as to facilitate resetting of the current-limiting plate 22. For example, referring to fig. 3, the reset member 24 often drives the first restrictor plate 221 and the second restrictor plate 222 to rotate to a first position where the opening of the open restrictor 213 is maximized.

Further, as shown in fig. 4, the driving connection end 2511 is formed with a connection hole 2515, the reset member 24 is a reset spring, one end of the reset spring (for example, an upper end of the reset spring shown in fig. 4) is fixed, for example, a third mounting hole may be provided on the bottom case 1, the one end of the reset spring is rotatably connected to the third mounting hole, and the other end of the reset spring (for example, a lower end of the reset spring shown in fig. 4) is hooked in the connection hole 2515.

A gas water heater 100 according to two embodiments of the present invention will be described with reference to fig. 1 to 4.

In a first embodiment of the present invention,

referring to fig. 1 and 2, the gas water heater 100 of the present embodiment includes a bottom case 1 and a flow restricting device 2, and the flow restricting device 2 is provided on the bottom case 1. Wherein, the bottom case 1 is provided with two rotation pins (the first fixing shaft 11 and the second fixing shaft 12), the flow limiting device 2 includes two connection rods (the first connection rod 233 and the second connection rod 234), two solenoid valves (the first driving member 231 and the second driving member 232), two flow limiting plates 22 (the first flow limiting plate 221 and the second flow limiting plate 222), and two return springs (the first return spring 241 and the second return spring 242).

Specifically, as shown in fig. 1, two rotation pins are fixed on the bottom case 1 through threads, and two flow limiting plates 22 are respectively installed on the rotation pins through a first shaft hole and a second shaft hole at the upper end and can rotate around the corresponding rotation pins; the two return springs are respectively connected with the first connecting holes 2213 and the second connecting holes 2223 at the lower ends of the two current limiting plates 22 through hooks, the return springs and the corresponding current limiting plates 22 can mutually rotate, and the other ends of the two return springs are positioned on the bottom shell 1 through a first mounting hole and a second mounting hole on the bottom shell 1 and can respectively rotate around the corresponding mounting holes; the two electromagnetic valves are fixed on the bottom shell 1 through screws; the two connecting rods connect the driving rods of the corresponding solenoid valves with the restrictor plate 22 via living hinges, respectively.

As shown in fig. 1, when the electromagnetic valve is not electrified, the electromagnetic valve does not apply a pulling force to the electromagnetic valve driving rod, at this time, the return spring is a main force application element of the mechanism, the current limiting plate 22 rotates around the rotating pin under the pulling force of the return spring, moves towards the direction approaching the smoke exhaust pipe 211, and gradually reduces the flux of the current limiting port 213; the solenoid valve tie rod moves with the restrictor plate 22 via the connecting rod until the restrictor mechanism is in a minimum flux state.

As shown in fig. 2, when the solenoid valve is energized, the solenoid valve will exert a pulling force on the solenoid valve drive rod, which acts on the restrictor plate 22 through the connecting rod, while the return spring also exerts a pulling force on the restrictor plate 22. When the tension of the electromagnetic valve is larger than that of the return spring, the flow limiting plate 22 rotates around the rotating pin and moves towards the direction away from the smoke exhaust pipe 211, so that the flux of the flow limiting opening 213 is gradually increased; by continuing to increase the current, the solenoid pull rod tension is increased until the current limiting mechanism is at a maximum flux state.

The gas water heater 100 of the present embodiment can adjust the current of the electromagnetic valve, so that the current-limiting mechanism stays at a position between the minimum flux and the maximum flux, so as to meet the system requirement. And the first electromagnetic valve and the second electromagnetic valve can be independently electrified and controlled, so that the flux of the current limiting mechanism can be flexibly adjusted.

According to the gas water heater 100 of the embodiment of the invention, when the external wind pressure changes, the system electric control board captures a variable signal, compares the variable signal with a reference quantity, determines the current output to the electromagnetic valve, adjusts the opening of the flow limiting board 22, and changes the air inlet flow of the system, thereby improving the combustion condition, the system noise and the service performance of the combustion system and achieving the effect of self-adapting environment change.

In addition, the flow restrictor 2 of the present embodiment may also be used in the field of ventilation devices for adaptively adjusting air supply, exhaust, etc.

In a second embodiment of the present invention,

as shown in fig. 3 and 4, the gas water heater 100 of the present embodiment includes a bottom case 1 and a flow restricting device 2, and the flow restricting device 2 is provided on the bottom case 1. Wherein, three rotation pins (the first fixing shaft 11, the second fixing shaft 12 and the third fixing shaft 13) are provided on the bottom case 1, and the flow limiting device 2 includes a return spring (the return piece 24), a solenoid valve (the driving piece 23), a lever 251, two links (the first link 252 and the second link 253) and two flow limiting plates 22 (the first flow limiting plate 221 and the second flow limiting plate 222).

Referring to fig. 3, three rotation pins are fixed to the bottom case 1 by threads; the two flow limiting plates 22 are respectively arranged on the rotating pins through a first shaft hole and a second shaft hole at the upper end and can rotate around the corresponding rotating pins; the lever 251 is mounted on and rotatable about the rotation pin through a third axial hole in the middle of the lever 251; the reset spring is connected with a connecting hole 2515 at the right end of the lever 251 through a hook, the two can rotate mutually, the other end of the reset spring is positioned on the bottom shell 1 through a third mounting hole on the bottom shell 1, and the reset spring can rotate around the third mounting hole; the lower ends of the two connecting rods are connected with the corresponding current limiting plates 22 through movable hinges, the upper ends of the two connecting rods are connected into one end through hinges, the two connecting rods can rotate relatively, and the two connecting rods are connected with the left end of the lever 251 through a first sliding groove 2513; the solenoid valve is fixed to the bottom case 1 by a screw, and a driving rod 2301 of the solenoid valve is connected to the right end of the lever 251 by a second sliding groove 2514.

As shown in fig. 3, when the electromagnetic valve is not electrified, the electromagnetic valve does not apply a pulling force to the electromagnetic valve driving rod 2301, at this time, the return spring is a main force application element of the mechanism, the lever 251 rotates anticlockwise around the rotation pin under the pulling force of the return spring, the left end of the lever 251 pushes the connecting rod downwards to drive the current limiting plate 22 to rotate around the rotation pin, so that the current limiting plate 22 moves in a direction away from the smoke exhaust pipe 211; the solenoid valve pull rod moves with the right end of the lever 251 until the restriction 213 is at a maximum flux condition.

As shown in fig. 4, when the solenoid is energized, the solenoid will exert a pulling force on the solenoid drive rod 2301, which acts on the right end of the lever 251, while the return spring also exerts a pulling force on the restrictor plate 22. When the tension of the electromagnetic valve is larger than that of the return spring, the lever 251 rotates clockwise around the rotating pin, the left end of the lever 251 drives the connecting rod to move upwards, the current limiting plate 22 is driven to rotate around the rotating pin, and the current limiting plate 22 moves towards the direction close to the smoke exhaust pipe 211; by continuously increasing the current, the tension of the pull rod of the electromagnetic valve is improved, so that the current limiting mechanism is in a minimum flux state.

Of course, the gas water heater 100 of the present embodiment can adjust the solenoid valve current to make the flow-limiting mechanism stay at a position between the minimum flux and the maximum flux.

According to the gas water heater 100 of the embodiment of the invention, when the external wind pressure changes, the system electric control board captures a variable signal, compares the variable signal with a reference quantity, determines the current output to the electromagnetic valve, adjusts the opening of the flow limiting board 22, and changes the air inlet flow of the system, thereby improving the combustion condition, the system noise and the service performance of the combustion system and achieving the effect of self-adapting environment change.

In addition, the flow restrictor 2 of the present embodiment may also be used in the field of ventilation devices for adaptively adjusting air supply, exhaust, etc.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A current limiting device, comprising:

the sleeve assembly comprises an inner pipe and an outer pipe sleeved on the outer side of the inner pipe, an air inlet channel is formed between the outer wall of the inner pipe and the inner wall of the outer pipe, and the air inlet channel is provided with a restriction orifice;

the flow limiting plates are arranged at the positions of the flow limiting ports and used for adjusting the opening degrees of the flow limiting ports, the flow limiting plates comprise a plurality of flow limiting plates which are arranged around the central axis of the flow limiting ports, the flow limiting plates comprise a first flow limiting plate and a second flow limiting plate, a driving piece is connected with the first flow limiting plate and used for driving the first flow limiting plate to pivot around a first axis, and the driving piece is connected with the second flow limiting plate and used for driving the second flow limiting plate to pivot around a second axis;

the driving piece, the driving piece with the current-limiting plate links to each other and is used for driving the current-limiting plate motion is in order to adjust the aperture of restriction mouth, the driving piece includes: the first driving piece is in transmission connection with the first current limiting plate, and the second driving piece is in transmission connection with the second current limiting plate;

The first driving piece is provided with a first driving rod, the first driving rod is movable along the length direction of the first driving rod, and the free end of the first driving rod is connected with the first current limiting plate;

the second driving piece is provided with a second driving rod, the second driving rod is movable along the length direction of the second driving rod, and the free end of the second driving rod is connected with the second current limiting plate.

2. The flow restriction device according to claim 1, wherein the first axis is parallel to a central axis of the restriction, and the second axis is parallel to the central axis of the restriction.

3. The flow restricting device of claim 1, wherein the driver further comprises:

the two ends of the first connecting rod are respectively hinged with the free end of the first driving rod and the first current limiting plate;

and two ends of the second connecting rod are hinged with the free end of the second driving rod and the second current limiting plate respectively.

4. The flow restricting device of claim 1, wherein at least one of the first and second drivers is a solenoid valve.

5. The flow restrictor of any of claims 1-4, wherein the restrictor plate is movable between a first position where the restrictor opening is greatest and a second position where the restrictor opening is smallest,

The current limiting device further includes: the resetting piece is connected with the current limiting plate and drives the current limiting plate to move to the first position or the second position.

6. The flow restrictor device of claim 5, wherein the flow restrictor plate comprises a first flow restrictor plate and a second flow restrictor plate, the first flow restrictor plate and the second flow restrictor plate being disposed about a central axis of the flow restrictor orifice,

the first flow limiting plate is provided with a first end and a second end which are opposite in the circumferential direction of the flow limiting port, the first flow limiting plate is pivotable around a first axis positioned at the first end, and the reset piece is connected with the second end;

the second flow limiting plate is provided with a third end and a fourth end which are opposite in the circumferential direction of the flow limiting port, the second flow limiting plate is pivotable around a second axis positioned at the third end, and the reset piece is connected with the fourth end.

7. The flow restrictor of claim 6, wherein the first end of the first flow restrictor plate is disposed adjacent and side-by-side with the third end of the second flow restrictor plate.

8. The device of claim 6, wherein the second end of the first flow limiting plate is provided with a first connecting hole, the fourth end of the second flow limiting plate is provided with a second connecting hole, the reset member comprises a first reset spring and a second reset spring, one end of the first reset spring is fixed and the other end of the first reset spring is hooked to the first connecting hole, and one end of the second reset spring is fixed and the other end of the second reset spring is hooked to the second connecting hole.

9. A gas water heater, comprising:

a bottom case;

the flow restrictor of any of claims 1-8, the inner tube being a smoke evacuation tube, the outer tube being an air intake tube, the restrictor plate being movably disposed on the bottom shell.

10. The gas water heater of claim 9, wherein the restrictor plate comprises a first restrictor plate and a second restrictor plate, the first restrictor plate and the second restrictor plate being disposed in sequence about a central axis of the restrictor orifice;

the bottom shell is provided with a first fixed shaft and a second fixed shaft, the first current limiting plate is rotatably connected with the first fixed shaft, and the second current limiting plate is rotatably connected with the second fixed shaft.

11. The gas water heater according to claim 10, wherein a first limit groove is formed in the first flow limiting plate, the first limit groove extends from the outer periphery of the first flow limiting plate to the inner periphery, a first limit post is formed in the bottom shell and is slidably arranged in the first limit groove, and the first limit post is abutted against the closed end of the first limit groove when the first flow limiting plate is opened with the maximum opening;

The second limiting plate is provided with a second limiting groove, the second limiting groove extends from the outer periphery of the second limiting plate to the inner periphery, the bottom shell is provided with a second limiting column, the second limiting column is slidably arranged in the second limiting groove, and the second limiting plate is stopped against the closed end of the second limiting groove when the opening of the limiting opening is maximum.