CN112283952A

CN112283952A - Current limiting device and gas water heater with same

Info

Publication number: CN112283952A
Application number: CN201910662622.3A
Authority: CN
Inventors: 仇正良; 范威; 代先锋; 梁国荣; 张洪斌
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2021-01-29
Anticipated expiration: 2039-07-22
Also published as: CN112283952B

Abstract

The invention discloses a sleeve pipe flow limiting device and a gas water heater with the same, wherein the sleeve pipe flow limiting device comprises: the sleeve assembly comprises an inner pipe and an outer pipe sleeved outside 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 flow limiting port; the flow limiting plate is arranged at the position of the flow limiting opening and is 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 degree of the flow limiting opening. According to the flow limiting device, the flow limiting plate is arranged to adjust the opening degree of the flow limiting port 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 changes is achieved.

Description

Current limiting device and gas water heater with same

Technical Field

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

Background

With the improvement of living standard and the gradual improvement of gas supply facilities, household rapid gas water heaters are gradually popularized, and the comfortable and safe bathing environment provided for consumers is more and more emphasized by the industry. However, the environment is variable, and how to adapt the water heater to the variable environment becomes a research hotspot for the industry.

Disclosure of Invention

The present invention is based on the finding by the inventors of the present application of the following facts and problems:

in the research process, the inventor of the application finds that the section of an air inlet fixed on a smoke tube of a gas water heater (balance machine type) in the prior art cannot adjust the air volume, and the problems of abnormal combustion and excessive noise are easy to occur under the conditions of different lengths of the smoke tube. Provides a self-adaptive flow-limiting ring scheme, which can automatically adjust the section of an air inlet of a smoke pipe according to the change of external wind pressure and improve the problems of abnormal combustion and noise

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a flow limiting device which can effectively adjust the air quantity of an air inlet channel and improve the problems of combustion abnormity and noise.

The invention also provides a gas water heater with the current limiting device.

A current limiting device according to a first aspect of the present invention includes: the sleeve assembly comprises an inner pipe and an outer pipe sleeved outside 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 flow limiting port; the flow limiting plate is arranged at the position of the flow limiting opening and is 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 degree of the flow limiting opening.

According to the flow limiting device, the flow limiting plate is arranged to adjust the opening degree of the flow limiting port 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 changes is achieved.

In some embodiments, the restrictor plate comprises a plurality of restrictor plates disposed around 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 drive is coupled to the first restrictor plate for driving the first restrictor plate to be pivotable about a first axis, and the drive 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 flow limiting plate, and the second driving piece is in transmission connection with the second flow limiting plate.

In some embodiments, the first drive member has a first drive rod movable along its length, the first drive rod having a free end connected to the first restrictor plate; the second driving piece is provided with a second driving rod, the second driving rod can move along the length direction of the second driving rod, and the free end of the second driving rod is connected with the second throttling plate.

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

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

In some embodiments, the restrictor plate is movable between a first position at which the opening of the restrictor is maximum and a second position at which the opening of the restrictor is minimum, and the restrictor device further comprises: the resetting piece is connected with the flow limiting plate and drives the flow 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 being disposed around a central axis of the restrictor orifice, the first restrictor plate having a first end and a second end 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 restrictor plate has a third end and a fourth end opposite to each other in the circumferential direction of the restrictor orifice, is pivotable about a second axis at the third end, and is connected to the fourth end.

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

In some embodiments, the second end of the first restrictor plate is provided with a first connection hole, the fourth end of the second restrictor plate is provided with a second connection hole, and the reset member includes 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 connection 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 connection hole.

A gas water heater according to a 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 to adjust the opening degree of the flow limiting port of the air inlet channel, so that the air inlet flow of air can be changed, the combustion condition of a combustion system is improved, the noise of the system is reduced, and the service performance is improved.

In some embodiments, the restrictor plates include a first restrictor plate and a second restrictor plate, which are sequentially disposed around a central axis of the restrictor orifice; the bottom shell is provided with a first fixing shaft and a second fixing shaft, the first current limiting plate is rotatably connected with the first fixing shaft, and the second current limiting plate is rotatably connected with the second fixing shaft.

In some embodiments, a first limiting groove is formed in the first flow limiting plate, the first limiting groove extends from the outer circumferential edge of the first flow limiting plate to the inner circumferential edge, a first limiting post is formed on the bottom shell, the first limiting post is slidably disposed in the first limiting groove, and the first limiting post stops against the closed end of the first limiting groove when the first flow limiting plate is opened to the maximum opening degree; the second flow limiting plate is provided with a second limiting groove, the second limiting groove extends from the outer periphery edge to the inner periphery edge of the second flow limiting plate, 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 column is stopped against the closed end of the second limiting groove when the second flow limiting plate is opened to enable the opening of the flow limiting port to be 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 invention, wherein the opening degree of a flow restriction plate for opening a flow restriction port is larger;

FIG. 2 is a schematic view of the gas water heater shown in FIG. 1 with the restrictor plate opening the restrictor orifice at a minimum opening;

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

fig. 4 is a schematic view of the gas water heater shown in fig. 1, wherein the restrictor plate opens the restrictor orifice by a relatively large amount.

Reference numerals:

a gas water heater 100 for heating water in a hot water,

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

the flow-limiting device (2) is,

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

the flow restriction plate 22 is provided with a flow restriction plate,

a first current limiting plate 221, a first end 2211, a second end 2212, a first connecting hole 2213, a first limiting groove 2214,

a second current limiting plate 222, a third end 2221, a fourth end 2222, a second connection hole 2223, a second limiting groove 2224,

a driving member 23, a driving rod 2301, a first driving member 231, a first driving rod 2311, a second driving member 232, a second driving rod 2321, a first connecting rod 233, a second connecting rod 234,

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

the driving mechanism comprises a transmission piece 25, a lever 251, a driving connecting end 2511, a driven connecting end 2512, a first sliding groove 2513, a second sliding groove 2514, a connecting hole 2515, a first connecting rod 252 and a second connecting rod 253.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

First, briefly describing the gas water heater 100 according to the second aspect of the present invention, the gas water heater 100 includes a bottom case 1, a smoke exhaust pipe 211, an air inlet pipe 212, a flow restriction plate 22 and a driving member 23, wherein the smoke exhaust pipe 211, the air inlet pipe 212, the flow restriction plate 22 and the driving member 23 constitute the flow restriction device 2 according to the first aspect of the present invention.

Specifically, the air inlet pipe 212, the smoke exhaust pipe 211, the driving member 23 and the current limiting plate 22 are all arranged on the bottom case 1, the air inlet pipe 212 is sleeved outside 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 current limiting opening 213. The restrictor plate 22 is movably disposed at the position of the restrictor opening 213, the restrictor plate 22 is used for adjusting the opening degree of the restrictor opening 213, the driving member 23 is connected to the restrictor plate 22, and the driving member 23 is used for driving the restrictor plate 22 to move so as to adjust the opening degree of the restrictor opening 213. The phrase "the restrictor plate 22 is used to adjust the opening degree of the restrictor 213" means: the restrictor plate 22 can adjust the cross-sectional flow area of the restrictor opening 213, for example, the restrictor plate 22 can fully open the restrictor opening 213 or fully close the restrictor opening 213, and the restrictor plate 22 can be maintained at any position between the fully open restrictor opening 213 and the fully closed restrictor opening 213. Of course, the opening range of the restriction opening 213 adjusted by the restriction plate 22 may also be smaller than 0-100%, and the user may set the adjustable range of the restriction plate 22 according to actual needs.

Wherein, the gas water heater 100 can also include the controller, and the controller can adjust the aperture of restricted flow mouth 213 according to the wind pressure of external environment, specifically, when external wind pressure changes, the controller can receive the variable signal that the wind pressure changes, compares variable signal and reference flow, decides the output value to this adjusts the aperture of restricted flow board 22, and then changes the air intake flow, thereby improves combustion system's combustion situation, system noise and performance, reaches the effect of self-adaptation 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 degree of the flow limiting port 213 of the air inlet channel, so that the air inlet flow of air can be changed, the combustion condition of a combustion system is improved, the noise of the system is reduced, and the service performance is improved.

A current limiting device 2 according to an embodiment of the first aspect of the present 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 a first aspect of the present invention includes: a sleeve assembly 21, a restrictor plate 22 and a drive 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 inlet channel is formed between the outer wall of the inner tube 211 and the inner wall of the outer tube 212, and the air inlet channel has a flow restriction port 213; for example, the inner tube 211 and the outer tube 212 are each a tube having a circular 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 restriction plate 22 is arranged at the position of the flow restriction opening 213 and used for adjusting the opening degree of the flow restriction opening 213; the driving member 23 is connected to the restrictor plate 22 for driving the restrictor plate 22 to move to adjust the opening degree of the restrictor 213. Wherein the restriction 213 is provided in parallel with the cross section of the intake passage, for example, the restriction 213 may be directly formed at any cross section of the intake passage in the length direction.

According to the flow limiting device 2 of the embodiment of the invention, the flow limiting plate 22 is arranged to adjust the opening degree of the flow limiting port 213 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 changes is achieved.

In one embodiment of the present invention, as shown in fig. 1, the restrictor plate 22 may include a plurality of restrictor plates 22, and the plurality of restrictor plates 22 are disposed around the central axis of the restriction opening 213. Because the cross section of the air inlet channel is annular, and the shape of the restriction opening 213 is also annular, in this embodiment, by arranging a plurality of restriction plates 22, the restriction plates 22 can be conveniently driven to adjust the opening degree of the restriction opening 213, so that the structure setting is simple and reasonable. For example, referring to fig. 1, the plurality of flow restriction plates 22 are provided, the plurality of flow restriction plates 22 are spaced around the central axis of the flow restriction opening 213, and the plurality of flow restriction plates 22 are all disposed parallel to the flow restriction opening 213, so that the flow restriction plates 22 can shield the flow cross section of the flow restriction opening 213, thereby achieving the effect of adjusting the opening degree of the flow restriction opening 213. Further, when the choke plate 22 completely closes the choke port 213, a plurality of choke plates 22 may be connected end to end in a ring shape.

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, wherein the driving member 23 is connected to the first restrictor plate 221 for driving the first restrictor plate 221 to pivot about a first axis (e.g., the central axis of the first stationary shaft 11 shown in fig. 1), and the driving member 23 is connected to the second restrictor plate 222 for driving the second restrictor plate 222 to pivot about a second axis (e.g., the central axis of the second stationary shaft 12 shown in fig. 1). In this way, the area of the restriction opening 213 blocked by the first restriction plate 221 can be adjusted by pivoting the first restriction plate 221 about 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 about 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.

Each of the first and

second choke plates

221 and 222 may be formed in a substantially semicircular shape.

In some examples, as shown in fig. 1, the first axis may be parallel to a central axis of the restriction opening 213, such that when the first restriction plate 221 rotates around the first axis, the first restriction plate 221 may rotate in a plane where the restriction opening 213 is located, and the second axis may also be parallel to the central axis of the restriction opening 213, and when the second restriction plate 222 rotates around the second axis, the second restriction plate 222 may also rotate in the plane where the restriction opening is located, thereby improving stability of the first restriction plate 221 and the second restriction plate 222 during rotation, and reducing an occupied space of the first restriction plate 221 and the second restriction plate 222, which makes the structure more compact.

According to some embodiments of the present invention, as shown in fig. 1, the bottom case 1 may be provided with a first fixed shaft 11 and a second fixed shaft 12, the first throttling plate 221 may be rotatably connected to the first fixed shaft 11, and the second throttling plate 222 may be rotatably connected to the second fixed shaft 12. Specifically, as shown in fig. 1, a first shaft hole having an axis coinciding with the first axis is formed on the first flow restriction plate 221, a first fixed shaft 11 adapted to be rotatably connected with the first shaft hole is formed on the bottom case 1, a second shaft hole having an axis coinciding with the second axis is formed on the second flow restriction plate 222, and a second fixed shaft 12 adapted to be rotatably connected with the second shaft hole is formed on the bottom case 1, so that the first flow restriction plate 221 and the second flow restriction plate 222 can be conveniently and rotatably fixed on the bottom case 1. Alternatively, the first axial hole may be provided at one end of the first throttling plate 221 in the circumferential direction of the throttling port 213 (e.g., the upper end of the first throttling plate shown in fig. 1), and the second axial hole may be provided at one end of the second throttling plate 222 in the circumferential direction of the throttling port 213 (e.g., the upper end of the second throttling plate shown in fig. 1). Thus, by providing the rotation axis of the restrictor plate at the end of the restrictor plate, the flow cross section of the restrictor can be quickly opened or closed when the restrictor plate is rotated, thereby improving the efficiency of adjusting the opening degree of the restrictor 213.

Further, at least one of the first and second

stationary shafts

11 and 12 may be a rotation pin, and the rotation pin is screw-coupled with the bottom case 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 to the first threaded hole in an internal threaded manner, a first shaft hole is formed in the first flow limiting plate 221, and the first flow limiting plate 221 is connected with the first rotating pin through the first shaft hole and is rotatable relative to the first rotating pin. A second rotating pin is connected to the second threaded hole in a threaded manner, a second shaft hole is formed in the second flow restriction plate 222, and the second flow restriction 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 disposed on the first current limiting plate 221, the first limiting groove 2214 extends from the outer periphery of the first current limiting plate 221 toward the inner periphery, specifically, the first limiting groove 2214 extends from the outer periphery of the first current limiting plate toward the inner periphery of the first current limiting plate 221 along an arc line with the first fixing shaft 11 as a center, a first limiting post 14 is disposed on the bottom shell 1, the first limiting post 14 is slidably disposed in the first limiting groove 2214, and the first current limiting plate 221 stops against the closed end of the first limiting groove 2214 when the opening degree of the current limiting opening 213 of the first current limiting plate 221 is maximum; therefore, the first limit groove 2214 is in limit fit with the first limit column 14 to limit the maximum opening of the first restrictor 221 to the restrictor 213, so as to prevent the first restrictor 221 from slipping.

Meanwhile, a second limiting groove 2224 is formed in the second current limiting plate 222, the second limiting groove 2224 extends from the outer periphery of the second current limiting plate 222 to the inner periphery, specifically, the second limiting groove 2224 extends from the outer periphery of the second current limiting plate to the inner periphery of the second current limiting plate 222 along an arc line with the second fixed shaft 12 as a center, a second limiting post 15 is formed on the bottom case 1, the second limiting post 15 is slidably disposed in the second limiting groove 2224, and the second limiting post 15 is stopped at the closed end of the second limiting groove 2224 when the opening of the current limiting port 213 of the second current limiting plate 222 is maximum. Therefore, the maximum opening degree of the second restrictor plate 222 for adjusting the restrictor 213 can be limited by the limit fit of the second limiting groove 2224 and the second limiting column 15, and the second restrictor plate 222 is prevented from slipping.

According to some embodiments of the present invention, as shown in fig. 1 and 2, the driving member 23 may include: the first driving member 231 is in transmission connection with the first throttling plate 221, and the second driving member 232 is in transmission connection with the second throttling plate 222. That is, the first and

second choke plates

221 and 222 may be driven by the first and

second drivers

231 and 232, respectively, and thus, the first and

second choke plates

221 and 222 may be conveniently independently controlled.

In some embodiments, as shown in fig. 1, the first driving member 231 has a first driving rod 2311, the first driving rod 2311 is movable along the length direction thereof, the free end of the first driving rod 2311 is connected with the first restrictor plate 221, wherein the connection position of the first driving rod 2311 and the first restrictor plate 221 is spaced from the first axis; thus, when the first driving rod 2311 moves along the length direction thereof, the first throttling plate 221 can be pulled to rotate around the first axis to adjust the opening degree of the throttling opening 213.

Here, since the linear motion of the first driving rod 2311 needs to be converted into the rotation of the first restrictor plate 221, the free end of the first driving rod 2311 is movably connected to the first restrictor plate 221. For example, in one particular example, the drive 23 may further include: two ends of the first connecting rod 233 are respectively hinged with the free end of the first driving rod 2311 and the first restrictor plate 221; that is, one end of the first connecting rod 233 is hinged to the first driving rod 2311 and the other end is hinged to the first restrictor plate 221. Thus, the first connecting rod 233 can convert the linear motion of the first driving rod 2311 into the swing motion of the first choke 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 is movable along a length direction thereof, and a free end of the second driving rod 2321 is connected to the second throttling plate 222. Wherein the connection position of the second driving rod 2321 and the second restrictor plate 222 is spaced apart from the second axis; thus, when the second driving rod 2321 moves along the length direction thereof, the second throttling plate 222 can be pulled to rotate around the second axis so as to adjust the opening degree of the throttling opening 213.

Here, since the linear motion of the second driving rod 2321 needs to be converted into the rotation of the second throttling plate 222, the free end of the second driving rod 2321 is movably connected to the second throttling plate 222. For example, in one particular example, the drive 23 may further include: a second connecting rod 234, wherein two ends of the second connecting rod 234 are respectively hinged to the free end of the second driving rod 2321 and the second restrictor plate 222; that is, one end of the second connecting rod 234 is hinged to the second driving rod 2321 and the other end is hinged to the second choke plate 222. Thus, the second connecting rod 234 can convert the linear motion of the second driving rod 2321 into a rotation or swing motion of the second choke plate 222.

According to some embodiments of the present invention, as shown in fig. 1, at least one of the first driver 231 and the second driver 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, or 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 flow restriction port 213 can be adjusted, and the control precision can be improved.

According to some embodiments of the present invention, as shown in fig. 1 and 2, the restrictor plate 22 is movable between a first position at which the opening of the restrictor opening 213 is maximum and a second position at which the opening of the restrictor opening 213 is minimum (referring to the position of the restrictor plate 22 shown in fig. 2), and the restrictor device 2 may further include: the reset member 24, the reset member 24 is connected to the restrictor plate 22, and the reset member 24 drives the restrictor 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 always drives the restrictor plate 22 to move to the reset position, i.e., the reset member 24 always has a force to drive the restrictor plate 22 to move to the reset position, so as to facilitate the resetting of the restrictor plate 22. For example, referring to fig. 2, the reset member 24 always drives the first restrictor plate 221 and the second restrictor plate 222 to rotate to the second position where the opening of the restrictor opening 213 is the smallest.

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 are disposed around a central axis of the restrictor opening 213, the first restrictor plate 221 has a first end 2211 and a second end 2212 opposite in a circumferential direction of the restrictor opening 213, the first restrictor plate 221 is pivotable about a first axis at the first end 2211, and the reset piece 24 is connected to the second end 2212; the first drive 231 is coupled between the first end 2211 and the second end 2212 of the first restrictor plate 221. Further, the second restrictor plate 222 has a third end 2221 and a fourth end 2222 opposite to each other in the circumferential direction of the restrictor port 213, the second restrictor plate 222 is pivotable about a second axis 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 restrictor 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 adjacent to and juxtaposed with the third end 2221 of the second restrictor plate 222, such that the first axis and the second axis can be adjacent to and juxtaposed with each other, 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 213 shown in fig. 1).

In some examples, the second end 2212 of the first restrictor plate 221 is provided with a first connection hole 2213, the fourth end 2222 of the second restrictor plate 222 is provided with a second connection hole 2223, the restoring member 24 may include a first restoring spring 241 and a second restoring spring 242, one end of the first restoring spring 241 (e.g., the lower end of the first restoring spring 241 shown in fig. 1) is fixed, e.g., the bottom case 1 may be provided with a first mounting hole (not shown), the one end of the first restoring spring 241 is rotatably connected to the first mounting hole, and the other end of the first restoring spring 241 (e.g., the upper end of the first restoring spring 241 shown in fig. 1) is hooked to the first connection hole 2213, one end of the second restoring spring 242 (e.g., the lower end of the second restoring spring 242 shown in fig. 1) is fixed, e.g., the bottom case 1 may be provided with a second mounting hole (not shown), the one end of the second restoring spring 242 is rotatably provided in the second mounting hole, and the other end of the second return spring 242 (e.g., the upper end of the second return spring 242 shown in fig. 1) is 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 transmission piece 25, the transmission piece 25 has a driving connection end 2511 and a driven connection end 2512, the driving piece 23 is connected with the driving connection end 2511 of the transmission piece 25, and the driven connection end 2512 is connected with the restrictor plate 22; the driving member 23 drives the restrictor plate 22 to move via the transmission member 25 to adjust the opening degree of the restrictor 213. The driving member 23 may be a solenoid valve.

In one embodiment, as shown in fig. 3, the transmission member 25 may include: lever 251, lever 251 has drive link end 2511, driven link end 2512 and a fulcrum located between drive link end 2511 and driven link end 2512, and lever 251 is rotatable about the fulcrum. Specifically, one end of the lever 251 (for example, 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 used for connecting with the driving element 23, the other end of the lever 251 is formed as a driven connection end 2512, the driven connection end 2512 is used for connecting with the restrictor plate 22, the fulcrum of the lever 251 is formed as a third shaft hole, the bottom case 1 is provided with a third fixed shaft 13, and the lever 251 is rotatably connected with the third fixed shaft 13 through the third shaft hole, which is the fulcrum of the lever 251 and is used for fixing the lever 251 and enabling the lever 251 to rotate around the position. This embodiment is through setting up driving medium 25 to lever 251, through the position of reasonable setting fulcrum for drive connection 2511 removes the great displacement that less position can realize driven connection 2512, improves the drive efficiency to current-limiting plate 22, and simultaneously, can also realize the drive to current-limiting plate 22 through exerting less power, laborsaving and laborsaving moment.

In some examples, as shown in fig. 3, 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 are disposed around a central axis of the restrictor opening 213, for example, the first restrictor plate 221 and the second restrictor plate 222 are disposed in sequence around the central axis of the restrictor opening 213, and the transmission 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 restrictor plate 221 and the second restrictor plate 222 through the first link 252 and the second link 253, respectively, thereby reducing the number of driving members 23 and improving the 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., a right end of the first link 252 shown in fig. 4) is slidably disposed in the first sliding slot 2513, and the other end of the first link 252 (e.g., a left end of the first link 252 shown in fig. 4) is hinged to the first choke plate 221; in this way, the first link 252 can translate the oscillation (approximately translation) of the driven connection end 2512 into an oscillation of the first restrictor plate 221 about the first axis. One end of the second link 253 (for example, the left end of the second link 253 shown in fig. 4) is slidably disposed in the first sliding slot 2513, and the other end of the second link 253 (for example, the right end of the second link 253 shown in fig. 4) is hinged to the second choke plate 222. Thus, second link 253 translates movement from the follower connection end of lever 251 into pivoting of second restrictor plate 222 about the second axis.

Further, as shown in fig. 4, one end of the first link 252 (e.g., a right end of the first link 252 shown in fig. 4) is hinged to one end of the second link 253 (e.g., a 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 slot 2513 of the lever 251. Thereby, it can be ensured that the lever 251 can synchronously drive the first link 252 and the second link 253.

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

According to some embodiments of the present invention, as shown in fig. 3 and 4, the restrictor plate 22 is movable between a first position (referring to the position of the restrictor plate 22 shown in fig. 4) where the opening of the restrictor plate 213 is the maximum and a second position (referring to the position of the restrictor plate 22 shown in fig. 3) where the opening of the restrictor plate 213 is the minimum, and the restrictor device 2 may further include: the reset member 24, the reset member 24 is connected to the restrictor plate 22, and the reset member 24 drives the restrictor 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 always drives the restrictor plate 22 to move to the reset position, i.e., the reset member 24 always has a force to drive the restrictor plate 22 to move to the reset position, so as to facilitate the resetting of the restrictor plate 22. For example, referring to fig. 3, the reset member 24 always drives the first restrictor plate 221 and the second restrictor plate 222 to rotate to the first position where the opening of the restrictor opening 213 is the maximum.

Further, as shown in fig. 4, the driving connection end 2511 is formed with a connection hole 2515, the restoring member 24 is a restoring spring, one end of the restoring spring (e.g., the upper end of the restoring 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 restoring spring is rotatably connected with the third mounting hole, and the other end of the restoring spring (e.g., the lower end of the restoring spring shown in fig. 4) is hooked in the connection hole 2515.

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

In the first embodiment, the first step is,

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

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

As shown in fig. 1, when the electromagnetic valve is not energized, the electromagnetic valve does not apply a pulling force to the driving rod of the electromagnetic valve, and at this time, the return spring is the main force application element of the mechanism, and the restrictor plate 22 rotates around the rotation pin under the pulling force of the return spring and moves towards the direction close to the smoke exhaust pipe 211, thereby gradually reducing the flux of the restrictor 213; the solenoid 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 applies a pulling force to the solenoid valve driving rod, the pulling force acts on the restrictor plate 22 through the connecting rod, and the return spring also applies a pulling force to the restrictor plate 22. When the pulling force of the electromagnetic valve is greater than the pulling force of the return spring, the restrictor plate 22 rotates around the rotating pin and moves towards the direction far away from the smoke exhaust pipe 211, and the flux of the restrictor 213 is gradually increased; by continuously increasing the current, the pull rod tension of the solenoid valve is increased until the current limiting mechanism is in a maximum flux state.

The gas water heater 100 of the embodiment can adjust the energizing current of the electromagnetic valve to enable the current limiting mechanism to stay at a certain 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 the variable signal, compares the variable signal with the reference quantity, and determines the current output to the electromagnetic valve, so as to adjust the opening degree of the flow limiting plate 22 and change the air intake 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 to the environmental change.

In addition, the current limiting device 2 of the present embodiment may also be used in the field of ventilation equipment for adaptive adjustment of air supply, air exhaust, and the like.

In the second embodiment, the first embodiment of the method,

as shown in fig. 3 and 4, the gas water heater 100 of the present embodiment includes a bottom case 1 and a flow restriction device 2, and the flow restriction device 2 is provided on the bottom case 1. The bottom shell 1 is provided with three rotating pins (a first fixed shaft 11, a second fixed shaft 12 and a third fixed shaft 13), and the flow limiting device 2 comprises a return spring (a return element 24), an electromagnetic valve (a driving element 23), a lever 251, two connecting rods (a first connecting rod 252 and a second connecting rod 253) and two flow limiting plates 22 (a first flow limiting plate 221 and a 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 ends and can rotate around the corresponding rotating pins; the lever 251 is mounted on the rotation pin through a third shaft hole in the middle of the lever 251 and can rotate around the rotation pin; the return spring is connected with a connecting hole 2515 at the right end of the lever 251 through a hook and can rotate mutually, the other end of the return spring is positioned on the bottom shell 1 through a third mounting hole in the bottom shell 1, and the return spring can rotate around the third mounting hole; the lower ends of the two connecting rods are connected with the corresponding flow 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 then the two connecting rods are connected with the left end of the lever 251 through a first sliding groove 2513; the electromagnetic valve is fixed on the bottom case 1 through a screw, and a driving rod 2301 of the electromagnetic valve is connected with the right end of the lever 251 through a second sliding chute 2514.

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

When the solenoid valve is energized, the solenoid valve will apply a pulling force to the solenoid valve driving rod 2301, as shown in fig. 4, and the pulling force is applied to the right end of the lever 251, and the return spring also applies a pulling force to the restrictor plate 22. When the pulling force of the electromagnetic valve is greater than the pulling force 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, and the flow restriction plate 22 is driven to rotate around the rotating pin, so that the flow restriction plate 22 moves towards the direction close to the smoke exhaust pipe 211; by continuously increasing the current, the pull rod tension of the solenoid valve is increased, so that the current limiting mechanism is in a minimum flux state.

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

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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

Claims

1. A current limiting device, comprising:

the sleeve assembly comprises an inner pipe and an outer pipe sleeved outside 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 flow limiting port;

the flow limiting plate is arranged at the position of the flow limiting opening and is 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 degree of the flow limiting opening.

2. The flow restricting device of claim 1, wherein the flow restricting plate comprises a plurality of flow restricting plates arranged around a central axis of the flow restricting orifice.

3. The flow restricting device of claim 2, wherein the plurality of flow restricting plates includes a first flow restricting plate and a second flow restricting plate, the drive coupled to the first flow restricting plate for driving the first flow restricting plate pivotable about a first axis, the drive coupled to the second flow restricting plate for driving the second flow restricting plate pivotable about a second axis.

4. The flow restriction device of claim 3, wherein the first axis is parallel to a central axis of the flow restriction and the second axis is parallel to a central axis of the flow restriction.

5. The flow-limiting device of claim 3, wherein the driver comprises: the first driving piece is in transmission connection with the first flow limiting plate, and the second driving piece is in transmission connection with the second flow limiting plate.

6. Flow-limiting device according to claim 5,

the first driving piece is provided with a first driving rod, the first driving rod can move along the length direction of the first driving rod, and the free end of the first driving rod is connected with the first throttling plate;

the second driving piece is provided with a second driving rod, the second driving rod can move along the length direction of the second driving rod, and the free end of the second driving rod is connected with the second throttling plate.

7. The flow-limiting device of claim 6, wherein the driver further comprises:

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

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

8. The flow limiting device of claim 5, wherein at least one of the first driver and the second driver is a solenoid valve.

9. The flow restriction device of any one of claims 1 to 8, wherein the restrictor plate is movable between a first position at which the opening of the restrictor is at a maximum and a second position at which the opening of the restrictor is at a minimum,

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

10. The flow restricting device of claim 9, wherein the flow restricting plate comprises a first flow restricting plate and a second flow restricting plate, the first flow restricting plate and the second flow restricting plate being disposed around a central axis of the flow restricting port,

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

the second restrictor plate has a third end and a fourth end opposite to each other in the circumferential direction of the restrictor orifice, is pivotable about a second axis at the third end, and is connected to the fourth end.

11. The flow restriction device of claim 10, wherein the first end of the first flow restriction plate is adjacent to and juxtaposed with the third end of the second flow restriction plate.

12. The flow limiting device of claim 10, 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.

13. A gas water heater, comprising:

a bottom case;

the flow restricting device of any one of claims 1 to 12, wherein the inner tube is a smoke exhaust tube, the outer tube is an air intake tube, and the flow restricting plate is movably disposed on the bottom housing.

14. The gas water heater of claim 13, wherein the restrictor plate comprises a first restrictor plate and a second restrictor plate, the first restrictor plate and the second restrictor plate being arranged in series around a central axis of the restrictor orifice;

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

15. The gas water heater according to claim 14, wherein the first current limiting plate is provided with a first limiting groove extending from an outer circumferential edge of the first current limiting plate to an inner circumferential edge, the bottom shell is provided with a first limiting post slidably disposed in the first limiting groove, and the first current limiting plate stops against a closed end of the first limiting groove when the opening of the current limiting port is maximum;

the second flow limiting plate is provided with a second limiting groove, the second limiting groove extends from the outer periphery edge to the inner periphery edge of the second flow limiting plate, 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 column is stopped against the closed end of the second limiting groove when the second flow limiting plate is opened to enable the opening of the flow limiting port to be maximum.