Gas inlet connector and gas water heater comprising same

Abstract

The utility model provides a gas inlet connector and a gas water heater comprising the same. The gas inlet connector comprises a driving assembly, a gear assembly, a baffle and a limiting part. The driving assembly is arranged in a flow channel of the air inlet connector, the baffle is rotatably arranged in the flow channel, a rotating shaft of the baffle extends in the radial direction of the flow channel, the baffle is matched with the section of the flow channel in shape, the baffle is arranged on the downstream of the driving assembly in the flowing direction of water flow, and the baffle is in transmission connection with the driving assembly through the gear assembly. The driving assembly is arranged in the mode that when no water flows through the flow channel, the driving assembly is located at the first position, the baffle is located at the third position where at least part of the flow channel is opened, and when water flows through the flow channel, the driving assembly can rotate so as to be switched to the second position from the first position and drive the baffle to be switched to the fourth position where the flow channel is blocked from the third position. When the gas inlet connector is connected to a water pipe in a staggered mode, the runner can be blocked, and the gas water heater is prevented from being damaged by water pressure impact.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water heater, especially an air inlet joint and a gas water heater comprising the same. BACKGROUND

[0002] In the gas water heater, the air inlet joint is the "gate" of the water heater, and is a key factor to ensure the normal operation of the water heater. The conventional air inlet joint is installed by integral casting or casting of upper and lower two parts, and has no mistake-proof structure inside. Since some users like to install or replace the machine by themselves, the users are not familiar with the installation of the parts of the gas water heater, and there is a situation that the air inlet joint is connected to the water line by mistake, which causes the machine to be unable to start normally, and even causes the damage of the proportional valve and other parts due to the excessive water pressure, and the whole machine is scrapped. SUMMARY

[0003] The utility model solves the technical problem that the air inlet joint has no mistake-proof structure in the prior art, and provides an air inlet joint and a gas water heater comprising the same.

[0004] The utility model solves the above technical problems by the following technical scheme:

[0005] An air inlet joint comprises:

[0006] A driving assembly is arranged in a flow channel of the air inlet joint, and is arranged to be located at a first position when no water flows through the flow channel, and to be rotatable to switch from the first position to a second position when water flows through the flow channel.

[0007] A gear assembly;

[0008] A baffle is rotatably arranged in the flow channel, a rotation shaft of the baffle extends along a radial direction of the flow channel, a shape of the baffle matches a cross section of the flow channel, the baffle is arranged downstream of the driving assembly along a flow direction of the water flow, the baffle is in transmission connection with the driving assembly through the gear assembly, when the driving assembly is located at the first position, the baffle is located at a third position of at least partially opening the flow channel, when the driving assembly switches from the first position to the second position, the driving assembly drives the baffle to switch from the third position to a fourth position of blocking the flow channel.

[0009] A limiting part is used to limit a rotation degree of freedom of the driving assembly to not more than the second position.

[0010] In the technical solution, the driving assembly is rotatable, the driving assembly transmits the rotary motion to the baffle through the gear assembly, when there is no tap water flowing in the flow channel, the driving assembly is located at the first position, at this time, the baffle is located at the third position of at least partially opening the flow channel, that is, when the air inlet connector is not used or the air inlet connector is connected to the gas pipe for use, the air inlet end can be kept in a smooth ventilation state; when there is water flowing in the flow channel, the driving assembly can be rotated from the first position to the second position, at this time, the baffle is driven by the driving assembly from the third position to the fourth position under the transmission of the gear assembly, so as to block the air inlet connector, that is, when the air inlet connector is connected to the water pipe, the air inlet connector is blocked to prevent water from entering the gas pipeline of the gas water heater provided with the air inlet connector, and prevent the pressure and impact of water from causing damage to the gas water heater provided with the air inlet connector.

[0011] Preferably, the gear assembly comprises at least two bevel gears, the bevel gear connected with the driving assembly is a first gear, the bevel gear connected with the baffle is a second gear, the rotation axis of the first gear extends along the axial direction of the flow channel, the second gear is arranged outside the flow channel of the air inlet connector, and the first gear is at least partially arranged in the flow channel of the air inlet connector.

[0012] In the technical solution, the specific arrangement scheme of the gear assembly is provided, compared with the arrangement scheme that the second gear is arranged in the flow channel, by arranging the second gear outside the flow channel, the space in the flow channel is not occupied, so that the space in the flow channel is larger and the flow resistance of the gas is smaller when the air inlet connector is normally used.

[0013] Preferably, the gear assembly further comprises a third gear, the third gear is arranged outside the flow channel, and the first gear is engaged with the second gear through the third gear.

[0014] In the technical solution, the transmission between the first gear and the second gear is realized by using the third gear, so that the first gear does not interfere with the baffle, and the structure of the air inlet connector can be made more compact.

[0015] Preferably, the driving assembly comprises a plurality of vortex blades, and the plurality of vortex blades are arranged in a circumferential direction of the rotation axis of the first gear.

[0016] In the technical solution, the specific form of the driving assembly is set as the vortex blade, which is simple in structure and convenient to process.

[0017] Preferably, the first gear is arranged on one side of the flow channel close to the second gear.

[0018] Compared with the first gear being arranged at the shaft center of the flow channel, by arranging the first gear at the side close to the second gear in the flow channel, on the one hand, the structure of the air inlet joint can be more compact, and on the other hand, the vortex blade can abut against the peripheral wall of the flow channel at the end away from the rotation shaft in the rotation process, so that the rotation movement of the vortex blade is limited, that is, the limiting part is the peripheral wall of the flow channel, and an additional limiting structure is not needed.

[0019] Preferably, the radius of the flow channel is R, and the length of the vortex blade is L, and the value range of L is 1 / 3R≤L≤2 / 3R.

[0020] Preferably, the number of the vortex blades is not less than two.

[0021] Preferably, the material of the baffle is a corrosion-resistant material.

[0022] Preferably, the material of the vortex blade is a corrosion-resistant material.

[0023] In the technical solution, by arranging the material of the baffle as a corrosion-resistant material, the service life of the baffle can be prolonged.

[0024] Preferably, the tooth ratio of the first gear and the second gear is a, and the value range of a is 1 / 4≤a≤1 / 3.

[0025] A gas water heater comprises the air inlet joint.

[0026] In the technical solution, by arranging the air inlet joint in the gas water heater, when the air inlet joint is installed incorrectly, the damage and scrapping of the gas water heater can be prevented.

[0027] The positive progress effect of the utility model lies in that the air inlet joint and the gas water heater comprising the same can block the flow channel when the air inlet joint is incorrectly connected to the water pipe, so that the damage of the gas water heater caused by water pressure impact can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 4 is a schematic view of a sectional structure of the baffle of the air inlet joint in the third position according to an embodiment of the utility model.

[0029] Figure 2 FIG. 5 is a schematic view of a sectional structure of the baffle of the air inlet joint in the fourth position according to an embodiment of the utility model.

[0030] REFERENCE SIGNS:

[0031] Air inlet joint 100

[0032] Flow channel 101

[0033] Drive assembly 1

[0034] Gear assembly 2

[0035] First gear 21

[0036] Second gear 22

[0037] Third gear 23

[0038] Baffle 3 DETAILED DESCRIPTION

[0039] The utility model is described in detail below with reference to the preferred embodiments and the accompanying drawings.

[0040] The embodiment provides a gas water heater, which comprises an air inlet joint 100, as shown in Figure 1 and Figure 2 The air inlet joint 100 comprises a drive assembly 1, a gear assembly 2, a baffle 3 and a limiting part. The drive assembly 1 is arranged in a flow channel 101 of the air inlet joint 100, and the drive assembly 1 is arranged such that when there is no water flowing through the flow channel 101, the drive assembly 1 is located at a first position, and when there is water flowing through the flow channel 101, the drive assembly 1 can rotate to switch from the first position to a second position; the baffle 3 is rotatably arranged in the flow channel 101, the rotation shaft of the baffle 3 extends along the radial direction of the flow channel 101, the shape of the baffle 3 matches the cross section of the flow channel 101, the baffle 3 is arranged downstream of the drive assembly 1 along the flow direction L of the water flow, and the baffle 3 is in transmission connection with the drive assembly 1 through the gear assembly 2, as shown in Figure 1 When the drive assembly 1 is located at the first position, the baffle 3 is located at a third position for opening the flow channel 101, as shown in Figure 2As shown, when the driving assembly 1 is switched from the first position to the second position, the driving assembly 1 drives the baffle 3 to switch from the third position to the fourth position to block the flow channel 101; the limiting part is used to limit the rotation freedom of the driving assembly 1 to not exceed the second position. By arranging the driving assembly 1, the gear assembly 2 and the baffle 3 in the flow channel 101 of the air inlet joint 100, the driving assembly 1 can rotate, the driving assembly 1 transmits the rotary motion to the baffle 3 through the gear assembly 2, when there is no tap water flowing in the flow channel 101, the driving assembly 1 is located at the first position, at this time, the baffle 3 is located at the third position to at least partially open the flow channel 101, that is, when the air inlet joint 100 is not used or the air inlet joint 100 is connected to the gas pipe for use, the air inlet end can be kept in a smooth ventilation state; when there is water flowing in the flow channel 101, the driving assembly 1 can be rotated from the first position to the second position, at this time, the baffle 3 is driven by the driving assembly 1 from the third position to the fourth position under the transmission of the gear assembly 2, so as to block the air inlet joint 100, that is, when the air inlet joint 100 is connected to the water pipe, the air inlet joint 100 is blocked to prevent water from entering the gas pipeline of the gas water heater provided with the air inlet joint 100, to prevent the water pressure and impact from causing damage to the gas water heater. By arranging the limiting part, the driving assembly 1 is prevented from continuing to rotate from the first position to the second position under the action of water flow, so that the baffle 3 can stay at the fourth position, that is, the limiting part can maintain the state of staying at the second position after the driving assembly 1 is rotated to the second position, so that the baffle 3 maintains the state of blocking the flow channel.

[0041] Specifically, in the embodiment, when the baffle 3 is located at the third position, the surface with the same cross-sectional shape as the flow channel 101 is parallel to the flow direction L of the water flow, at this time, the flow channel 101 is in a completely open state, when the baffle 3 is located at the fourth position, the surface with the same cross-sectional shape as the flow channel 101 is perpendicular to the flow direction L of the water flow, at this time, the entire flow channel 101 is completely blocked.

[0042] In other embodiments, when the driving assembly 1 is located at the first position, the surface with the same cross-sectional shape as the flow channel 101 can also form a non-zero angle with the flow direction L of the water flow, at this time, the flow channel 101 is partially open, and gas can also pass through, which will not be described herein.

[0043] In the embodiment, the gear assembly 2 comprises at least two bevel gears, the bevel gear connected with the driving assembly 1 is a first gear 21, and the bevel gear connected with the baffle 3 is a second gear 22. The rotation shaft of the first gear 21 extends along the axial direction of the flow channel 101, the second gear 22 is arranged outside the flow channel 101 of the gas inlet joint 100, and the first gear 21 is partially arranged in the flow channel 101 of the gas inlet joint 100. Compared with the arrangement scheme in which the second gear 22 is arranged in the flow channel 101, by arranging the second gear 22 outside the flow channel 101, the space in the flow channel 101 is not occupied, so that the space of the flow channel 101 is larger when the gas inlet joint 100 is normally used, and the flow resistance of the gas is smaller.

[0044] Of course, in other embodiments, the gear assembly 2 can also be arranged entirely in the flow channel 101, at this time, the space occupied in the flow channel 101 is relatively large, and the gas inlet joint 100 needs to have a larger size to ensure that there is enough space for the gas to flow through, and the flow resistance of the gas is also larger. Or in more embodiments, the first gear 21 is arranged entirely in the flow channel 101, and the second gear 22 is arranged outside the flow channel 101, which will not be described here.

[0045] In particular, in the embodiment, the first gear 21 is arranged in the flow channel 101 close to one side of the second gear 22. Compared with arranging the first gear 21 at the center of the flow channel 101, by arranging the first gear 21 in the flow channel 101 close to one side of the second gear 22, on the one hand, the structure of the gas inlet joint 100 can be more compact, and on the other hand, the end of the vortex blade away from the rotation shaft of the vortex blade can abut against the peripheral wall of the flow channel 101 during the rotation process of the vortex blade, so that the rotation movement of the vortex blade is limited, that is, the limiting part is the peripheral wall of the flow channel 101, and there is no need to additionally arrange a limiting structure.

[0046] Of course, in other embodiments, a separate limiting part can also be arranged to prevent the movement range of the driving assembly 1 from exceeding the second position, for example, a protrusion that can abut against the driving assembly 1 when the driving assembly 1 is switched to the second position, which will not be described here.

[0047] In the embodiment, the gear assembly 2 further comprises a third gear 23, the third gear 23 is arranged outside the flow channel 101, and the first gear 21 is engaged with the second gear 22 through the third gear 23. By using the third gear 23 to achieve the transmission between the first gear 21 and the second gear 22, the structure of the gas inlet joint 100 can be made more compact while the first gear 21 does not interfere with the baffle 3.

[0048] In the embodiment, the driving assembly 1 comprises three vortex vanes which are arranged along the circumference of the rotation shaft of the first gear 21. By arranging the specific form of the driving assembly 1 as the vortex vanes, the structure is simple and the processing is convenient. Among them, the vortex vanes are rotated by the tap water to switch from the first position to the second position, and do not rotate by the gas. The specific setting parameters are referred to the prior art, and will not be described here.

[0049] The radius of the flow channel 101 is R, and the length of the vortex vane is L, and the value range of L is 1 / 3R≤L≤2 / 3R. Specifically, in the embodiment, the radius of the flow channel 101 is R, and the length of the vortex vane is L, and L=0.5R. But not limited to this, in other embodiments, L can also be other values in the value range, for example, L=1 / 3R or L=2 / 3R, etc., and will not be described here.

[0050] Specifically, in the embodiment, the number of vortex vanes is three. Of course, in other embodiments, according to the length and width of the vortex vane and the size of the flow channel 101, the vortex vane can also be set to one, two or more, and will not be described here.

[0051] In the embodiment, the material of the baffle 3 and the vortex vane is corrosion-resistant material. By arranging the baffle 3 and the vortex vane as corrosion-resistant material, the service life of the baffle 3 and the vortex vane can be prolonged.

[0052] The corrosion-resistant material can refer to the prior art, for example, using the corrosion-resistant metal material or resin material in the prior art to make the baffle 3 and the vortex vane, and will not be described here.

[0053] The tooth ratio of the first gear 21 and the second gear 22 is a, and the value range of a is 1 / 4≤a≤1 / 3. In the embodiment, on the basis that the third gear 23 does not affect the tooth ratio of the first gear 21 and the second gear 22, the tooth ratio a of the first gear 21 and the second gear 22 is 1 / 3, that is, the water flow only needs to push the driving assembly 1 to make the first gear 21 rotate by 30°, and the driving assembly 1 is switched from the first position to the second position, and the baffle 3 is switched from the third position to the fourth position.

[0054] But not limited to this, in other embodiments, a can also be other values in the value range, for example, a=1 / 4 or a=3 / 10, etc., and the tooth ratio of the first gear and the second gear is preferably set to, when the angle of the first gear rotation is between 20° and 30°, the baffle is switched from the third position to the fourth position, and will not be described here.

[0055] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. An air intake connector, characterized in that, It includes: A drive assembly is disposed within the flow channel of the air inlet connector. The drive assembly is configured such that when no water flows through the flow channel, the drive assembly is located in a first position, and when water flows through the flow channel, the drive assembly can rotate to switch from the first position to a second position. Gear assembly; A baffle is rotatably disposed within the flow channel, the baffle's axis of rotation extends radially along the flow channel, the shape of the baffle matches the cross-section of the flow channel, the baffle is disposed downstream of the drive assembly along the flow direction of the water flow, the baffle is connected to the drive assembly via the gear assembly, when the drive assembly is in the first position, the baffle is in a third position where the flow channel is at least partially open, when the drive assembly switches from the first position to the second position, the drive assembly drives the baffle to switch from the third position to a fourth position where the flow channel is blocked; A limiting part is provided to limit the rotational degree of freedom of the drive component to not exceed the second position.

2. The air intake connector as described in claim 1, characterized in that, The gear assembly includes at least two bevel gears. The bevel gear connected to the drive assembly is the first gear, and the bevel gear connected to the baffle is the second gear. The shaft of the first gear extends axially along the flow channel. The second gear is disposed outside the flow channel of the air intake connector, and the first gear is at least partially disposed inside the flow channel of the air intake connector.

3. The air intake connector as described in claim 2, characterized in that, The gear assembly further includes a third gear disposed outside the flow channel, and the first gear meshes with the second gear through the third gear.

4. The air intake connector as described in claim 2, characterized in that, The drive assembly includes a plurality of vortex blades, which are spaced circumferentially along the axis of rotation of the first gear.

5. The air intake connector as described in claim 4, characterized in that, The first gear is disposed within the flow channel on the side near the second gear.

6. The air intake connector as described in claim 5, characterized in that, The radius of the flow channel is R, and the length of the vortex blade is L, with L ranging from 1 / 3R ≤ L ≤ 2 / 3R.

7. The air intake connector as described in claim 4, characterized in that, The number of vortex blades is no less than two.

8. The air intake connector as described in claim 4, characterized in that, The baffle is made of corrosion-resistant material; And / or, the vortex blades are made of corrosion-resistant materials.

9. The air intake connector as described in claim 2, characterized in that, The gear ratio between the first gear and the second gear is a, and the value of a ranges from 1 / 4 to 1 / 3.

10. A gas-fired water heater, characterized in that, It includes the air intake connector as described in any one of claims 1-8.

Images