CN216717477U - Flowmeter and beverage machine using same - Google Patents

Abstract

The utility model relates to a flowmeter and a beverage machine using the flowmeter, comprising: a housing; the impeller is arranged in the shell and comprises a rotating shaft and blades arranged on the rotating shaft, and the impeller can rotate around the axis of the impeller under the action of water flow; the magnetic part is arranged on the impeller; the Hall element is arranged on the shell and corresponds to the magnetic piece; the blade has the first tip of being connected with the pivot and keeps away from the second tip of pivot, and the second tip of blade is located to the magnetic part. The magnetic part of the flowmeter is arranged at the side edge position of the blade of the impeller (namely, the second end part far away from the rotating shaft), the distance between the magnetic part and the Hall element is shortened, wherein the miniature magnet with relatively smaller mass is adopted on the blade of the impeller to meet the sensitivity sensing requirement, the weight of the impeller during rotation is reduced, the rotation process of the impeller is smoother, the water flow detection is more accurate, and the accurate detection can be realized particularly under the low-flow state.

Description

Flowmeter and beverage machine using same

Technical Field

The utility model relates to the technical field of flowmeters, in particular to a flowmeter and a beverage machine using the flowmeter.

Background

Flowmeters, such as turbine flowmeters, have been widely used for accurate measurement of fluids due to their simple structure, light weight, and easy maintenance.

As disclosed in chinese patent application No. CN201710142261.0 (application publication No. CN108572012A), a turbine flowmeter includes: a bottom case; the upper cover is connected with the bottom shell, a cavity is defined between the upper cover and the bottom shell, the cavity is provided with a water inlet and a water outlet which are eccentrically arranged and communicated with the cavity, an impeller is arranged in the cavity and is suitable for being driven by fluid to rotate, and a magnet is arranged on the impeller; the embedded part is arranged on the upper cover and is connected with the upper cover into a whole through injection molding, and a Hall sensor is arranged on the embedded part; the pin seat is arranged on the embedded part and covers the Hall sensor; and the contact pin is inserted on the contact pin base, one end of the contact pin penetrates out of the contact pin base, and the other end of the contact pin penetrates into the contact pin base to be connected with the Hall sensor. The flowmeter can realize the anti-drop and anti-loosening effects of the whole structure, ensures the normal work of the turbine flowmeter, can be applied to the working occasions needing liquid flow measurement, such as coffee machines, soybean milk machines, beverage machines and the like, and has wide application range.

However, the flow meter in the above patent has a certain disadvantage that the magnet in the flow meter is arranged above the central axis of the impeller, and the distance between the magnet and the hall element is relatively long, so that a relatively large magnet is needed to improve the sensitivity of the induction, so that the impeller is relatively heavy as a whole, the rotation is not smooth enough, and accurate flow data cannot be obtained under the condition of low water flow.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide a flowmeter with more accurate flow measurement, aiming at the current situation of the prior art.

The second technical problem to be solved by the present invention is to provide a beverage machine using the above flow meter, aiming at the current situation of the prior art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a flow meter, comprising:

a housing;

the impeller is arranged in the shell and comprises a rotating shaft and blades arranged on the rotating shaft, and the impeller can rotate around the axis of the impeller under the action of water flow;

the magnetic part is arranged on the impeller;

the Hall element is arranged on the shell and corresponds to the magnetic piece;

the blade has with the first end that the pivot is connected and keep away from the second end of pivot, the magnetic part is located the second end of blade.

In order to make the rotation process of the impeller more stable, avoid the problem of shaking or deflection in the rotation process and further improve the accuracy of flow detection, at least two blades are arranged at intervals along the circumferential direction of the rotating shaft, each blade comprises a first blade and a second blade which are symmetrically arranged relative to the rotating shaft, the number of the magnetic members is even, the magnetic members are respectively arranged at the second end part of the first blade and the second end part of the second blade, and the number of the magnetic members on the first blade is the same as that of the magnetic members on the second blade.

In order to mount the magnetic member on the blade, the second end of the blade has a groove in which the magnetic member is embedded.

In order to simplify the assembly process and facilitate disassembly and maintenance, the outer wall of the shell is provided with a mounting groove, and the Hall element is detachably arranged in the mounting groove.

In order to facilitate the assembly of all parts in the shell and simplify the consideration of the overall structure of the flowmeter, the shell comprises an upper cover body and a lower cover body, the mounting groove is formed in the outer wall of the lower cover body, the top of the mounting groove is provided with a mounting hole for the Hall element to be mounted in, and when the upper cover body is assembled in place relative to the lower cover body, the upper cover body is partially blocked at the mounting hole to limit the Hall element.

For further convenient assembly, reduce spare part quantity, go up the lid with the lid links together with the mode of rotatory block down, go up have on the lid corresponding to the mouth of stepping down of the installing port of lid, hall element warp let a mouthful pack into in the installing groove of lid down, hall element has the lead wire end that upwards stretches out, go up still have on the lid with the throat groove of the mouth intercommunication of stepping down go up the lid with the rotatory block of lid is in place down under the state, the throat groove with the installing port is relative, hall element's lead wire end warp the throat groove is drawn forth.

In order to realize the limitation of the rotary buckle between the upper cover body and the lower cover body, an outward convex lug is arranged on the peripheral wall of the lower cover body, and the lower cover body is provided with a limiting clamping groove for the lug to be clamped into the lug in a rotary manner.

In order to facilitate the assembly of the Hall element and improve the waterproof effect, the Hall element packaging box is used for mounting the Hall element, and a sealing layer is coated outside the packaging box.

As an improvement, the shell is provided with a liquid inlet joint, a flow limiting pipe which can be detached relative to the liquid inlet joint is arranged in a port of the liquid inlet joint, and the caliber of the flow limiting pipe is 1.2 mm-1.8 mm.

In order to enable the flowmeter to be used in switching between low flow and high flow, when high flow is required, a flow limiting pipe is not required to be installed, the diameters of the water inlet hole and the water outlet hole of the flowmeter shell are about 4.5mm, the flowmeter can be used in water quantities of 1000-3500g/min, and the maximum flow value of the general flowmeter is 2500 g/min;

when needs use at low-speed flow, can adorn the current-limiting pipe in the liquid inlet joint, the current-limiting pipe has multiple bore specification, can replace according to actual product requirement, specifically can use under the water yield operating mode below 150 ~ 1000 g/min.

The technical scheme adopted by the utility model for solving the second technical problem is as follows: a beverage machine comprises the flowmeter.

Compared with the prior art, the utility model has the advantages that: the magnetic part of the flowmeter is arranged at the side edge position of the blade of the impeller (namely, the second end part far away from the rotating shaft), the distance between the magnetic part and the Hall element is shortened, wherein the blade of the impeller can meet the sensitivity induction requirement by adopting a miniature magnet with relatively small mass, the weight of the impeller during rotation is greatly reduced, the rotation process of the impeller is smoother, the water flow detection is more accurate, especially, the accurate detection can be realized under the low flow state, and the flowmeter also reduces the production cost on the premise of ensuring the detection accuracy.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a top view of FIG. 1 (the upper cover and the lower cover are in a state of being rotatably engaged in place);

FIG. 4 is a top view of FIG. 1 (the upper cover and the lower cover are in an initial state of rotational engagement);

FIG. 5 is a schematic structural diagram of a Hall element and a packaging box assembled together according to an embodiment of the utility model;

FIG. 6 is a schematic perspective view of an upper cover according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of a lower cover according to an embodiment of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Referring to fig. 1-7, a flow meter includes a housing 10, an impeller 20, a magnet 30, and a hall element 40. The housing 10 defines therein a receiving chamber in which the impeller 20 is disposed. The shell 10 is provided with a liquid inlet joint 13 and a liquid outlet joint 14, and the liquid inlet joint 13 and the liquid outlet joint 14 are both connected with the accommodating chamber.

Referring to fig. 2, the housing 10 includes an upper cover 11 and a lower cover 12, and the upper cover 11 and the lower cover 12 are connected together in a rotating snap-fit manner, and define the accommodating chamber therebetween. A sealing ring 62 is further disposed between the upper cover 11 and the lower cover 12 to prevent fluid from leaking at the joint between the two. The inner wall of the upper cover 11 has a first positioning shaft 15, and the inner wall of the lower cover 12 has a second positioning shaft 16 that is located on the same straight line with the first positioning shaft 15. The upper end and the lower end of a rotating shaft 21 of the impeller 20 are rotatably limited on a first positioning shaft 15 and a second positioning shaft 16.

The outer peripheral wall of the lower cover 12 has a protrusion 123 protruding outward, and the lower cover 12 has a position-limiting slot 113 corresponding to the protrusion 123 for the protrusion 123 to be inserted into. When the flowmeter is assembled, the upper cover body 11 and the lower cover body 12 are relatively rotated, namely, the upper cover body and the lower cover body are locked together and then fastened through the screws 61, so that the flowmeter can be used in a high hydraulic pressure state.

The impeller 20 comprises a rotating shaft 21 and blades a arranged on the rotating shaft 21; 22 b. In the water passing state, the water flow acts on the blades of the impeller 20, thereby rotating the impeller 20 about its axis.

The impeller 20 of the present embodiment has at least two blades, and fig. 2 shows 6 blades which are uniformly spaced in the circumferential direction of the rotating shaft 21. Each of the blades has a first end 221 connected to the rotation shaft 21 and a second end 222 distant from the rotation shaft 21, and particularly, the second end 222 of the blade extends to an inner wall surface of the receiving chamber, thereby shortening the distance between the second end 222 of the blade (the magnetic member 30 provided therein) and the hall element 40 provided on the housing 10 as much as possible.

The magnetic member 30 is provided at the second end 222 of the blade. The second end 222 of the blade has a groove 223, and the magnetic member 30 is fitted in the groove 223. The magnetic member 30 of the present embodiment may be a micro magnet with relatively small mass, such as a cylindrical magnet shown in fig. 2, wherein the diameter of the magnet may be 1.5mm and the length of the magnet may be 3mm, so as to reduce the overall weight of the impeller 20, so that the impeller 20 rotates more smoothly, and the flow detection is more accurate.

Generally, there may be one magnetic member 30, that is, the magnetic member is correspondingly disposed at the second end 222 of one of the blades, in this embodiment, in order to make the rotation process of the impeller 20 more stable, and avoid the problem of shaking or deflection during the rotation process, so as to improve the accuracy of flow detection, there are two magnetic members 30 in this embodiment, which are respectively disposed on the first blade 22a and the second blade 22b which are symmetrically disposed.

Referring to fig. 5, the hall element 40 of the present embodiment is assembled into a packaging case 41 to form an assembly, and the exterior of the packaging case 41 is coated with a sealing layer (not shown), such as red glue, to prevent moisture from entering the hall element 40.

The outer wall of the lower cover 12 of the housing 10 has a mounting groove 121, the upper portion of the mounting groove 121 has a mounting opening 1210, and the packing case 41 assembled with the hall element 40 can be fitted into the mounting groove 121 from top to bottom. The size of the upper cover 11 is slightly larger than that of the lower cover 12, the outer peripheral portion of the upper cover 11 has an escape opening 111 corresponding to the mounting opening 1210 of the lower cover 12 and a necking groove 112 communicating with the escape opening 111, and the size of the necking groove 112 is smaller than that of the mounting opening 1210. During assembly, the package box 41 (hall element 40) is installed into the installation groove 121 of the lower cover 12 through the position opening 111, then the upper cover 11 and the lower cover 12 are rotated to lock the two together, the notch groove 112 and the installation opening 1210 are opposite in the vertical direction under the state that the upper cover 11 and the lower cover 12 are rotatably clamped in place, the lead ends of the hall element 40 are led out upwards through the notch groove 112, and the package box 41 assembled with the hall element 40 cannot be moved out of the notch groove 112, so that the problem that the package box 41 cannot fall off in the using process or the transportation process is avoided.

The liquid inlet joint 13 is arranged on the lower shell 10, and the liquid outlet joint 14 is arranged on the upper shell 10. Wherein, a flow-limiting pipe 50 which can be detached relative to the liquid inlet joint 13 is also arranged in the port of the liquid inlet joint 13, and the caliber of the flow-limiting pipe 50 is 1.2 mm-1.8 mm. The flow limiting pipe 50 can enable the flow meter of the embodiment to be switched between low flow and high flow, and specifically, a user can select whether to use the flow limiting pipe 50 according to actual requirements.

When high flow is needed, the flow limiting pipe 50 does not need to be installed, the diameters of the water inlet hole and the water outlet hole of the flowmeter shell 10 are about 4.5mm, the flowmeter can be used in water quantities of 1000 and 3500g/min, and the maximum flow value of a general flowmeter is 2500 g/min; when needs use at low-speed flow, can adorn flow-limiting tube 50 in liquid inlet joint 13, flow-limiting tube 50 has multiple bore specification, can replace according to actual product requirement, specifically can use under the water yield operating mode below 150 ~ 1000 g/min.

The embodiment also relates to a beverage machine, and the beverage machine adopts the flowmeter. The beverage machine of this embodiment can be products such as purifier, water dispenser, coffee machine, tea making machine.

On the basis of the above embodiments, other embodiments can be obtained by replacing and improving the related technical features. For example, the number of the magnetic members 30 is not limited to two, and specifically, two or more magnetic members may be used, and preferably, an even number of the magnetic members 30 are respectively arranged at the second end 222 of the first blade 22a and the second end 222 of the second blade 22b, wherein the number of the magnetic members 30 on the first blade 22a may be the same as the number of the magnetic members 30 on the second blade 22 b.

Claims (10)

1. A flow meter, comprising:

a housing (10);

the impeller (20) is arranged in the shell (10) and comprises a rotating shaft (21) and blades (22 a; 22b) arranged on the rotating shaft (21), and the impeller (20) can rotate around the axis of the impeller under the action of water flow;

a magnetic member (30) provided on the impeller (20);

the Hall element (40) is arranged on the shell (10) and corresponds to the magnetic piece (30);

the method is characterized in that: the blade (22 a; 22b) is provided with a first end part (221) connected with the rotating shaft (21) and a second end part (222) far away from the rotating shaft (21), and the magnetic part (30) is arranged at the second end part (222) of the blade (22 a; 22 b).

2. The flowmeter of claim 1, wherein: the blades (22 a; 22b) are at least two and are arranged at intervals along the circumferential direction of the rotating shaft (21), each blade (22 a; 22b) comprises a first blade (22a) and a second blade (22b) which are symmetrically arranged relative to the rotating shaft (21), the number of the magnetic members (30) is even, the magnetic members are respectively arranged at the second end part (222) of the first blade (22a) and the second end part (222) of the second blade (22b), and the number of the magnetic members (30) on the first blade (22a) is the same as that of the magnetic members (30) on the second blade (22 b).

3. The flowmeter of claim 1, wherein: the second end (222) of the blade (22 a; 22b) has a groove (223), the magnetic member (30) being embedded in the groove (223).

4. The flowmeter of any one of claims 1 to 3, wherein: the outer wall of the shell (10) is provided with a mounting groove (121), and the Hall element (40) is detachably arranged in the mounting groove (121).

5. The flowmeter of claim 4, wherein: the casing (10) comprises an upper cover body (11) and a lower cover body (12), the mounting groove (121) is formed in the outer wall of the lower cover body (12), a mounting hole (1210) for the Hall element (40) to be mounted into is formed in the top of the mounting groove, the upper cover body (11) is partially blocked at the mounting hole (1210) to limit the Hall element (40) when the upper cover body (11) is assembled in place relative to the lower cover body (12).

6. The flowmeter of claim 5, wherein: go up lid (11) with lid (12) link together with the mode of rotatory block down, last lid (11) are gone up to have corresponding to the mouth of stepping down (111) of installing port (1210) of lid (12) down, hall element (40) warp let a mouthful (111) pack into in installing groove (121) of lid (12) down, hall element (40) have the lead wire end that upwards stretches out, go up lid (11) go up still have with let a mouthful groove (112) that mouthful (111) communicate go up lid (11) with lid (12) rotation block is in place under the state down, throat groove (112) with installing port (1210) are relative, the lead wire end of hall element (40) warp draw forth in mouth groove (112).

7. The flowmeter of claim 5, wherein: the outer peripheral wall of the lower cover body (12) is provided with a convex block (123) which protrudes outwards, and the lower cover body (12) is provided with a limiting clamping groove (113) corresponding to the convex block (123) for the convex block (123) to be clamped into.

8. The flowmeter of claim 4, wherein: the Hall element packaging structure further comprises a packaging box (41) used for mounting the Hall element (40), and a sealing layer is coated on the outer portion of the packaging box (41).

9. A flowmeter according to any one of claims 1 to 3 wherein: the liquid inlet joint (13) is arranged on the shell (10), the flow limiting pipe (50) which can be detached relative to the liquid inlet joint (13) is arranged in the port of the liquid inlet joint (13), and the caliber of the flow limiting pipe (50) is 1.2 mm-1.8 mm.

10. A beverage machine which characterized in that: comprising a flowmeter according to any one of claims 1 to 9.

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