A hall flowmeter

Abstract

The utility model is specifically related to a kind of hall flowmeter, including main casing, impeller assembly is equipped in the main casing, installation lower seat is equipped on the main casing, installation upper cover is equipped on installation lower seat and installation cavity is formed between the two, hall sensor assembly is connected in installation cavity on installation lower seat, the hall sensor assembly includes the hall sensor main body and hall sensor pin connected, and installation upper cover lower end is equipped with the abutting portion that abuts with the upper end of hall sensor main body.The hall plate assembly is installed on installation lower seat, then installation upper cover is connected with installation lower seat, the abutting portion of installation upper cover lower end is formed abutting cooperation with hall sensor main body when completing assembly, so that it will not warp, to ensure measurement accuracy and stability.

Description

Technical Field

[0001] This utility model relates to the field of water flow detection technology, specifically to a Hall effect flow meter. Background Technology

[0002] Current coffee and beverage machine water systems typically incorporate flow meters to acquire fluid information. When fluid flows, it drives an impeller to rotate, which in turn rotates a screw. One or more magnetic poles are distributed along the circumference of the screw. When a magnetic pole rotates near a Hall sensor assembly, it generates a pulse signal (multiple magnetic poles generate multiple pulse signals). Higher flow rates result in more pulse signals, while lower flow rates result in fewer pulse signals. This allows the flow meter to detect the rotational speed and thus determine the fluid velocity and flow rate.

[0003] The Hall sensor assembly consists of the Hall sensor body and Hall sensor pins. During assembly, the Hall sensor assembly is usually placed on the lower mounting housing first, and then the upper mounting housing is pressed onto the lower mounting housing to complete the assembly. During this assembly process, the Hall sensor assembly is prone to warping, which can lead to: a) the Hall sensor body deviating from its designed position, affecting its sensing and measurement accuracy of the magnetic field, resulting in decreased measurement accuracy; b) the introduction of additional mechanical stress, causing system instability, which in turn affects the performance of the entire flowmeter, reducing system stability; c) damage to the internal electrical connections of the Hall sensor assembly, thereby shortening its service life; d) changes in the electromagnetic shielding effect of the Hall sensor assembly, increasing the impact of external interference on its measurement results. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a Hall effect flow meter.

[0005] The technical solution adopted by this utility model is as follows: A Hall flow meter includes a main housing, an impeller assembly is provided inside the main housing, a mounting base is provided on the main housing, a mounting cover is provided on the mounting base and the two form a mounting cavity, a Hall sensor assembly located in the mounting cavity is connected to the mounting base, the Hall sensor assembly includes a Hall sensor body and a Hall sensor pin connected to each other, and the lower end of the mounting cover is provided with an abutment part that abuts against the upper end of the Hall sensor body.

[0006] Preferably, the abutting part is an elastic pressure block that presses the Hall sensor body against the mounting base.

[0007] Preferably, the elastic pressure block is integrally formed on the mounting cover and is inclined. One end of the elastic pressure block is a connecting end connected to the lower end of the mounting cover, and the other end is a swing end. The swing end can swing relative to the connecting end and press the Hall sensor body against the mounting base.

[0008] Preferably, the lower end of the mounting cover has an integrally formed limiting block that restricts its movement to that side, corresponding to the side where the Hall sensor body is connected to the Hall sensor pin.

[0009] Preferably, the upper end of the main housing is integrally formed with an upwardly extending connecting post, and the mounting cover is correspondingly provided with a connecting hole groove, and the connecting post passes into the connecting hole groove to form a fixed connection with it.

[0010] Preferably, it also includes a pin, the Hall sensor pin has a bent end, the upper end of the mounting base is provided with a first positioning groove and a second positioning groove, the lower end of the Hall sensor body is located in the first positioning groove, and the bent end of the Hall sensor pin and the lower end of the pin extend into the second positioning groove and the two form a contact connection.

[0011] Preferably, the main housing includes an upper housing and a lower housing, the upper housing covering the upper end of the lower housing and including a housing top located above the lower housing and a housing ring located on the outer periphery of the lower housing. At least two connecting protrusions are provided on the outer circumference of the upper end of the lower housing, and corresponding abutting protrusions are provided on the inner circumference of the housing ring. There is an entry groove with a size not less than the length of the abutting protrusion between adjacent abutting protrusions. There is a sliding groove with a size not less than the height of the abutting protrusion between the upper end of the abutting protrusion and the lower end of the top of the housing. The connecting protrusion enters the sliding groove from the entry groove and rotates relative to the sliding groove to have a first connection position where at least part of the lower end of the connecting protrusion abuts against the upper end of the abutting protrusion.

[0012] Preferably, the sliding groove has a stop block at one end of the connecting protrusion, and when the connecting protrusion is in the first connecting position, one end of the connecting protrusion abuts against the stop block.

[0013] Preferably, the lower end face of the connecting protrusion includes a connecting abutment plane and a guide slope along its rotation direction. The lower end of the abutment plane is provided with an abutment rib. When the connecting protrusion is in the first connecting position, the abutment rib abuts against the upper end of the abutment protrusion.

[0014] Preferably, a central column is vertically provided inside the main housing, and the impeller assembly includes an impeller and a permanent magnet. The impeller includes a connecting column portion and a rotating wheel portion connected to the circumference of the connecting column portion. The connecting column portion has a column hole at its center that passes through its lower end and is adapted to the shape of the central column. The central column is located in the column hole so that the impeller can rotate around the central column. The upper end of the connecting column portion is provided with a groove, and the permanent magnet is embedded in the groove.

[0015] The beneficial effects of this utility model are as follows: The Hall plate assembly is installed on the mounting base, and then the mounting cover is connected to the mounting base. While the assembly is completed, the abutting part at the lower end of the mounting cover forms an abutting fit with the Hall sensor body, so that it will not warp, thereby ensuring measurement accuracy and stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a perspective view of the overall structure of an embodiment of the present utility model; Figure 2 This is a top view of the overall structure of an embodiment of the present utility model; Figure 3 for Figure 2 Cross-sectional view at point AA; Figure 4 for Figure 3 Enlarged view of the structure at point B in the middle; Figure 5 for Figure 2 Cross-sectional view at CC; Figure 6 This is a partial exploded view of the overall structure of an embodiment of this utility model; Figure 7 for Figure 6 Enlarged view of the structure at point D; In the diagram, 1. Main housing; 2. Lower mounting base; 3. Upper mounting cover; 4. Mounting cavity; 11. Upper housing; 12. Lower housing; 13. Central column; 21. First positioning groove; 22. Second positioning groove; 31. Elastic pressure block; 32. Limiting block; 33. Connecting hole groove; 51. Hall sensor body; 52. Hall sensor pin; 71. Impeller; 72. Permanent magnet; 101. Connecting column; 111. Top of housing; 112. Housing ring; 113. Sliding groove; 114. Positioning abutment block; 122. Connecting protrusion; 521. Bent end; 711. Connecting column; 712. Rotating wheel; 1121. Abutment protrusion; 1122. Entry groove; 1221. Guide slope; 1222. Abutment plane; 1223. Abutment rib; 7111. Column hole. Detailed Implementation

[0018] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0019] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0020] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0021] like Figures 1 to 7 As shown in the figure, a Hall effect flow meter according to an embodiment of the present invention includes a main housing 1, an impeller assembly inside the main housing 1, a mounting base 2 on the main housing, a mounting cover 3 on the mounting base 2 forming a mounting cavity 4 between the two, a Hall effect sensor assembly located in the mounting cavity 4 connected to the mounting base 2, the Hall effect sensor assembly including a Hall effect sensor body 51 and a Hall effect sensor pin 52 connected to each other, and an abutting part at the lower end of the mounting cover 3 that abuts against the upper end of the Hall effect sensor body 51.

[0022] With this setup, the Hall plate assembly is installed on the lower mounting base, and then the upper mounting cover is connected to the lower mounting base. While completing the assembly, the lower end of the upper mounting cover forms abutment with the Hall sensor body, preventing it from warping and thus ensuring measurement accuracy and stability.

[0023] The mounting base can be integrally formed with the main housing or it can be a separate component; in this embodiment, it is a separate structure. The Hall sensor body senses the change in magnetic field caused by the rotation of the impeller assembly to obtain the flow velocity and flow rate. The impeller assembly can be formed by setting magnets on the impeller to create a rotational linkage between the two, or it can be made of magnetic material.

[0024] The abutting part is an elastic pressure block 31 that presses the Hall sensor body 51 against the mounting base 2.

[0025] With this setup, the elastic pressure block uses its elastic restoring force to act on the Hall sensor body, further improving the anti-warping effect and making the connection between the Hall sensor assembly and the mounting base more stable.

[0026] The connection between the elastic pressure block and the mounting cover can be either integrally formed or a combination of separate structures. When they are separate structures, the elastic pressure block can be connected to the mounting cover via a spring.

[0027] The elastic pressure block 31 is integrally formed on the mounting cover 3 and is inclined. One end of the elastic pressure block 31 is a connecting end connected to the lower end of the mounting cover 3, and the other end is a swing end. The swing end can swing relative to the connecting end and press the Hall sensor body 51 against the mounting base 2.

[0028] With this design, since the mounting cover is made of plastic material through injection molding and has a certain degree of elasticity, the elastic pressure block and the mounting cover are integrally molded, which improves the processing convenience of this device; at the same time, the structure of the elastic pressure block ensures the anti-warping effect of the abutment part, making the position of the Hall sensor assembly connected to the mounting base more accurate and stable.

[0029] The lower end of the mounting cover 3, corresponding to the side where the Hall sensor body 51 is connected to the Hall sensor pin 52, has an integrally formed limiting block 32 that restricts its movement to that side.

[0030] With this setting, when the upper cover is pressed onto the lower mounting base, the limiting block positions the Hall sensor body horizontally, preventing it from deviating from the mounting position and further enhancing the anti-warping effect.

[0031] The upper end of the main housing 1 is integrally formed with an upwardly extending connecting post 101, and the mounting cover 3 is correspondingly provided with a connecting hole groove 33, and the connecting post 101 passes into the connecting hole groove 33 to form a fixed connection with it.

[0032] This design further improves the ease of processing and assembly of the device. In this embodiment, the connecting column is fixed by heat riveting after being inserted into the connecting hole groove.

[0033] It also includes a pin 6, the Hall sensor pin 52 has a bent end 521, the upper end of the mounting base 2 is provided with a first positioning groove 21 and a second positioning groove 22, the lower end of the Hall sensor body 51 is located in the first positioning groove 21, the bent end 521 of the Hall sensor pin 52 and the lower end of the pin 6 extend into the second positioning groove 22 and the two form a contact connection.

[0034] This setting positions the Hall sensor body in the first positioning groove, effectively preventing it from deviating from its installation position.

[0035] The main housing 1 includes an upper housing 11 and a lower housing 12. The upper housing 11 covers the upper end of the lower housing 12 and includes a housing top 111 located above the lower housing 12 and a housing ring 112 located on the outer periphery of the lower housing 12. At least two connecting protrusions 122 are provided on the outer circumference of the upper end of the lower housing 12, and corresponding abutting protrusions 1121 are provided on the inner circumference of the housing ring 112. There is an entry groove 1122 between adjacent abutting protrusions 1121 with a size not less than the length of the abutting protrusion 1121. There is a sliding groove 113 between the upper end of the abutting protrusion 1121 and the lower end of the top 111 of the housing with a size not less than the height of the abutting protrusion 1121. The connecting protrusion 122 enters the sliding groove 113 from the entry groove 1122 and rotates relative to the sliding groove 113 to have a first connection position where at least part of the lower end of the connecting protrusion 122 abuts against the upper end of the abutting protrusion 1121.

[0036] With this design, the upper and lower housings are snapped together and rotated for easy assembly and disassembly.

[0037] The sliding groove 113 is provided with a positioning block 114 at one end of the connecting protrusion 122. When the connecting protrusion 122 is in the first connection position, one end of it abuts against the positioning block 114.

[0038] This setting marks the position of the connecting protrusion when it is rotated into place by the stop block.

[0039] The lower end face of the connecting protrusion 122 includes a connecting abutment plane 1222 and a guide slope 1221 along its rotation direction. The lower end of the abutment plane 1222 is provided with an abutment rib 1223. When the connecting protrusion 122 is in the first connecting position, the abutment rib 1223 abuts against the upper end of the abutment protrusion 1121.

[0040] This design improves the stability of the connection between the upper and lower shells while ensuring easy assembly and disassembly.

[0041] The main housing 1 is vertically provided with a central column 13. The impeller assembly includes an impeller 71 and a permanent magnet 72. The impeller 71 includes a connecting column portion 711 and a rotating wheel portion 712 connected to the circumference of the connecting column portion 711. The connecting column portion 711 has a column hole 7111 through its lower end and adapted to the shape of the central column 13. The central column 13 is located in the column hole 7111, allowing the impeller 71 to rotate around the central column 13. The upper end of the connecting column portion 711 is provided with a groove, and the permanent magnet 72 is embedded in the groove.

[0042] This design allows for convenient and stable assembly of the impeller assembly and the main housing.

[0043] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A Hall effect flow meter, comprising a main housing (1), wherein an impeller assembly is disposed within the main housing (1), a mounting base (2) is disposed on the main housing, a mounting cover (3) is disposed on the mounting base (2) and a mounting cavity (4) is formed between the two, a Hall effect sensor assembly located within the mounting cavity (4) is connected to the mounting base (2), the Hall effect sensor assembly comprising a Hall effect sensor body (51) and a Hall effect sensor pin (52) connected to each other, characterized in that: The lower end of the mounting cover (3) is provided with an abutting part that abuts against the upper end of the Hall sensor body (51).

2. The Hall effect flowmeter according to claim 1, characterized in that: The abutting part is an elastic pressure block (31) that presses the Hall sensor body (51) against the mounting base (2).

3. A Hall effect flow meter according to claim 2, characterized in that: The elastic pressure block (31) is integrally formed on the mounting cover (3) and is inclined. One end of the elastic pressure block (31) is a connecting end connected to the lower end of the mounting cover (3), and the other end is a swing end. The swing end can swing relative to the connecting end and press the Hall sensor body (51) against the mounting base (2).

4. A Hall effect flow meter according to claim 1, characterized in that: The lower end of the mounting cover (3) is integrally formed with a limiting block (32) that restricts its movement to that side, corresponding to the side where the Hall sensor body (51) and Hall sensor pin (52) are connected.

5. A Hall effect flow meter according to claim 1, characterized in that: The upper end of the main housing (1) is integrally formed with an upwardly extending connecting post (101), and the mounting cover (3) is correspondingly provided with a connecting hole groove (33). The connecting post (101) passes into the connecting hole groove (33) and forms a fixed connection with it.

6. A Hall effect flowmeter according to claim 1, characterized in that: It also includes a pin (6), the Hall sensor pin (52) has a bent end (521), the upper end of the mounting base (2) is provided with a first positioning groove (21) and a second positioning groove (22), the lower end of the Hall sensor body (51) is located in the first positioning groove (21), the bent end (521) of the Hall sensor pin (52) and the lower end of the pin (6) extend into the second positioning groove (22) and the two form a contact connection.

7. A Hall effect flow meter according to claim 1, characterized in that: The main housing (1) includes an upper housing (11) and a lower housing (12). The upper housing (11) covers the upper end of the lower housing (12) and includes a housing top (111) located above the lower housing (12) and a housing ring (112) located on the outer periphery of the lower housing (12). At least two connecting protrusions (122) are provided on the outer circumference of the upper end of the lower housing (12), and corresponding abutting protrusions (1121) are provided on the inner circumference of the housing ring (112). There is an entry groove (1122) with a size not less than the length of the abutting protrusion (1121) between adjacent abutting protrusions (1121). There is a sliding groove (113) with a size not less than the height of the abutting protrusion (1121) between the upper end of the abutting protrusion (1121) and the lower end of the top of the housing (111). The connecting protrusion (122) enters the sliding groove (113) from the entry groove (1122) and rotates relative to the sliding groove (113) to have a first connection position where at least part of the lower end of the connecting protrusion (122) abuts against the upper end of the abutting protrusion (1121).

8. A Hall effect flow meter according to claim 7, characterized in that: The sliding groove (113) has a stop block (114) at one end of the connecting protrusion (122). When the connecting protrusion (122) is in the first connection position, one end of it abuts against the stop block (114).

9. A Hall effect flow meter according to claim 7, characterized in that: The lower end face of the connecting protrusion (122) includes a connecting abutment plane (1222) and a guide slope (1221) along its rotation direction. The lower end of the abutment plane (1222) is provided with an abutment rib (1223). When the connecting protrusion (122) is in the first connecting position, the abutment rib (1223) abuts against the upper end of the abutment protrusion (1121).

10. A Hall effect flowmeter according to claim 1, characterized in that: The main housing (1) is vertically provided with a central column (13). The impeller assembly includes an impeller (71) and a permanent magnet (72). The impeller (71) includes a connecting column (711) and a rotating wheel (712) connected to the circumference of the connecting column (711). The connecting column (711) has a column hole (7111) that passes through its lower end and is adapted to the shape of the central column (13). The central column (13) is located in the column hole (7111) so that the impeller (71) can rotate around the central column (13). The upper end of the connecting column (711) is provided with a groove, and the permanent magnet (72) is embedded in the groove.

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