Miniature diaphragm pump and household appliance equipment

Abstract

The utility model relates to the technical field of diaphragm pumps, in particular to a miniature diaphragm pump and household appliance equipment. The micro diaphragm pump comprises a diaphragm pump main body, an impeller and a Hall element, the diaphragm pump main body comprises an upper cover, and the upper cover is connected and communicated with a water inlet pipe; the impeller is rotationally installed in the water inlet pipe and comprises an impeller shaft, blades and a magnetic part, the impeller shaft is a metal part, and the blades are formed on the impeller shaft and the magnetic part in an injection molding mode; the Hall element is arranged on the outer side of the water inlet pipe and used for detecting the position of the magnetic part and generating a feedback signal. According to the impeller, the impeller shaft of the impeller is configured to be the metal part, and by means of the structural characteristics of metal materials, the situation that the impeller shaft deforms, fractures and the like due to uneven stress in the demolding direction in the demolding process of the impeller can be avoided, so that it can be ensured that the size of the impeller shaft meets the requirement, and the service life of the impeller is prolonged. The use requirement that the impeller is rotationally installed in the water inlet pipe to be assembled is met, and therefore the product percent of pass of the impeller can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to diaphragm pump technical field, especially a kind of micro diaphragm pump and household appliance equipment. BACKGROUND

[0002] Micro diaphragm pump is widely used in coffee machine, floor washing machine, water purifier and other household appliances, for the fluid in household appliance equipment is pressurized and transported, the existing household appliance equipment for facilitating people to use, still install impeller and hall element in micro diaphragm pump, wherein, hall element can induct the magnetic field change brought by impeller rotation to feedback the flow rate of fluid, to achieve the purpose of detecting flow while the micro diaphragm pump transports fluid.

[0003] At present, the existing impeller usually uses integrally injection molded plastic magnetic impeller, however, in actual production process, due to the size of impeller shaft on impeller is small and protruding, so in demolding process, if impeller exists uneven force in demolding direction, the part of protruding blade on impeller shaft will bear larger stress, so that the part of protruding blade on impeller shaft is prone to deformation, even fracture and other adverse phenomena, so it will affect the assembly of subsequent impeller, and reduce the qualified rate of product. SUMMARY

[0004] Therefore, it is necessary to provide a micro diaphragm pump and household appliance equipment capable of solving the above technical problems.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] A micro diaphragm pump, the micro diaphragm pump comprises:

[0007] A diaphragm pump body comprising an upper cover, a water inlet pipe connected and communicated on the upper cover;

[0008] An impeller rotatably installed in the water inlet pipe, the impeller comprising an impeller shaft, a blade and a magnetic element, the impeller shaft being a metal piece, the blade being molded on the impeller shaft and the magnetic element;

[0009] A hall element arranged on the outside of the water inlet pipe for detecting the position of the magnetic element and generating a feedback signal.

[0010] It can be understood that the impeller shaft of the impeller is configured as a metal piece, which utilizes the structural characteristics of metal material, so that the deformation and fracture of the impeller shaft due to uneven force in the demolding direction during demolding can be avoided, so that the size of the impeller shaft can meet the requirements, so as to meet the use requirements of the assembly of the impeller rotatably installed in the water inlet pipe, thereby improving the product qualified rate of the impeller.

[0011] In one of the embodiments, the impeller shaft is configured as a stainless steel needle shaft.

[0012] It can be understood that the impeller shaft can utilize the material properties of the stainless steel needle shaft, so that the surface roughness of the impeller shaft is low, which can reduce the friction between the impeller shaft and the support when the impeller shaft rotates on the support, and the friction and the impact force of the fluid to the impeller are dynamically balanced, thereby improving the flow detection accuracy of the micro diaphragm pump during operation.

[0013] In one of the embodiments, the micro diaphragm pump further comprises a support, the support is partially inserted into the water inlet pipe and connected with the upper cover;

[0014] The impeller shaft is rotatably mounted on the part of the support in the water inlet pipe.

[0015] It can be understood that the impeller can be assembled to the support first, and then the support is assembled into the water inlet pipe, which can facilitate the assembly of the impeller in the water inlet pipe.

[0016] In one of the embodiments, the support is connected with the upper cover in an interference fit.

[0017] It can be understood that the support can be connected and fixed with the upper cover in an interference fit, which can facilitate the assembly between the support and the upper cover and ensure the stability of the assembly of the support on the upper cover.

[0018] In one of the embodiments, the support comprises two legs, and the impeller shaft is rotatably mounted between the two legs.

[0019] The two legs can be respectively inserted and fitted with the upper cover, and the support is circumferentially limited in the upper cover.

[0020] It can be understood that through the above structure, on the one hand, the connection between the support and the upper cover can be facilitated, and on the other hand, the stability of the assembly and limiting of the support on the upper cover can be improved.

[0021] In one of the embodiments, an abutting surface is formed on the support, and an abutting fitting surface is formed on the upper cover, the abutting fitting surface can abut with the abutting surface, for limiting the insertion depth of the support in the upper cover.

[0022] It can be understood that through the abutment between the abutting fitting surface and the abutting surface, the assembly depth of the support on the upper cover can be limited, so as to facilitate the assembly of the support on the upper cover.

[0023] In one of the embodiments, the support comprises two legs, and the impeller shaft is mounted between the two legs in a press fit.

[0024] Wherein, a guide surface is formed on each of the legs, and the guide surface can guide the impeller shaft to be pressed into the two legs, so that the impeller shaft is rotationally connected with the two legs.

[0025] It can be understood that the guide surface on each leg guides the impeller shaft to be pressed into the corresponding leg, so that each leg can guide the pressing of the impeller by the guide surface, which facilitates the pressing of the impeller into the two legs of the support.

[0026] In one embodiment, the two end surfaces of the impeller shaft are arc-shaped.

[0027] It can be understood that the impeller shaft can be rotationally connected to the legs of the support by the arc-shaped end surfaces, so that the arc-shaped structure can facilitate the assembly of the impeller to the support and reduce the frictional resistance of the impeller when rotating on the support.

[0028] In one embodiment, the water inlet pipe is integrally connected with the upper cover.

[0029] It can be understood that the water inlet pipe can be integrally injection molded with the upper cover, which ensures the sealing connection between the water inlet pipe and the upper cover, simplifies the structure, and reduces the material cost.

[0030] The present application also claims a household appliance device comprising the above-mentioned micro diaphragm pump.

[0031] Due to the application of the above-mentioned scheme, the present application has the following advantages compared with the prior art:

[0032] The micro diaphragm pump and the household appliance device claimed in the present application configure the impeller shaft of the impeller as a metal piece, which utilizes the structural characteristics of metal materials, so that the deformation and fracture of the impeller shaft due to uneven stress in the demolding direction during the demolding process of the impeller can be avoided, so that the size of the impeller shaft can meet the requirements, so as to meet the use requirements of the impeller being rotationally installed in the water inlet pipe, thereby improving the product qualification rate of the impeller. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 The assembly exploded view of the upper cover, the support and the impeller provided by an embodiment of the present application.

[0035] Figure 2 An assembly view of the upper cover, the bracket and the impeller provided by an embodiment of the present application.

[0036] Figure 3 For Figure 2 A cross-sectional view at A-A.

[0037] Figure 4 A structure view of the upper cover provided by an embodiment of the present application.

[0038] Figure 5 An assembly view of the bracket and the impeller provided by an embodiment of the present application.

[0039] Reference signs: 11, upper cover; 111, water inlet pipe; 112, box body; 113, slot; 114, support inclined surface; 115, abutting matching surface; 20, impeller; 21, impeller shaft; 211, end surface; 22, blade; 40, bracket; 41, supporting leg; 411, guide surface; 42, abutting surface. DETAILED DESCRIPTION

[0040] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those specifically described herein, and it is to be understood that the present application is not limited to the specific embodiments described below.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only orientation of the implementation.

[0042] In addition, the terms "first", "second", etc. are used only for the purpose of description and should not be understood as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0043] In the present application, unless specifically defined and limited otherwise, the first feature is "on", "under", "above" or "over" the second feature can be the first feature directly and the second feature contact, or the first feature and the second feature indirectly through the intermediate medium contact. Moreover, the first feature is "on", "above" and "over" the second feature can be the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature can be the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is less than the second feature in horizontal height.

[0044] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0045] As shown in Figures 1 to 5 The micro diaphragm pump provided by the embodiment of the present application comprises a diaphragm pump body (not shown in the figure), an impeller 20 and a Hall element (not shown in the figure), the diaphragm pump body comprises an upper cover 11, the upper cover 11 is connected and communicated with a water inlet pipe 111; the impeller 20 is rotatably installed in the water inlet pipe 111, the impeller 20 comprises an impeller shaft 21, a blade 22 and a magnetic member (not shown in the figure), the impeller shaft 21 is a metal member, the blade 22 is formed on the impeller shaft 21 and the magnetic member in the form of injection molding; the Hall element is arranged outside the water inlet pipe 111 and is used for detecting the position of the magnetic member and generating a feedback signal. Here, the upper cover 11 is connected with a box body 112, and the Hall element is installed in the box body 112 in the form of dispensing. The magnetic member is configured as a magnet, a permanent magnet or other objects with certain magnetism. It should be noted that the structure of the Hall element and how to detect the position of the magnetic member and generate a feedback signal during work can all adopt the existing conventional manner, which will not be expanded here.

[0046] It can be understood that the impeller shaft 21 of the impeller 20 is configured as a metal member, which utilizes the structural characteristics of the metal material, so that the deformation and fracture of the impeller shaft 21 due to uneven stress in the demolding direction during the demolding process of the impeller 20 can be avoided, so that the size of the impeller shaft 21 can meet the requirements, so as to meet the use requirements of the impeller 20 rotatably installed in the water inlet pipe 111, thereby improving the product qualification rate of the impeller 20.

[0047] As shown in Figure 1As shown in the drawings, in an embodiment, the water inlet pipe 111 is connected with the upper cover 11 as a whole, so that the water inlet pipe 111 can be integrally injection molded with the upper cover 11, which can ensure the sealing connection between the water inlet pipe 111 and the upper cover 11, and has the effects of simplifying the structure and reducing the material cost.

[0048] As shown in the drawings, Figure 2 , Figure 3 As shown in the drawings, in an embodiment, the micro diaphragm pump further comprises a bracket 40, the bracket 40 partially extends into the water inlet pipe 111 and is connected with the upper cover 11; wherein the impeller shaft 21 is rotatably installed on the bracket 40 at a position inside the water inlet pipe 111. That is, the impeller 20 can be assembled to the bracket 40 first, and then the bracket 40 is assembled into the water inlet pipe 111, which can facilitate the assembly of the impeller 20 in the water inlet pipe 111. Here, the material of the bracket 40 can be configured as polyformaldehyde.

[0049] As shown in the drawings, Figure 1 As shown in the drawings, in an embodiment, the impeller shaft 21 is configured as a stainless steel needle shaft. That is, the impeller shaft 21 can utilize the material properties of the stainless steel needle shaft, so that the surface roughness of the impeller shaft 21 is relatively low, which can reduce the friction between the impeller shaft 21 and the bracket 40 when the impeller shaft 21 rotates on the bracket 40, and make the friction and the impact force of the fluid to the impeller 20 achieve dynamic balance, thereby improving the flow detection accuracy of the micro diaphragm pump during operation. It can be understood that in other embodiments, the impeller shaft 21 can also be configured as a copper alloy needle shaft, an aluminum alloy needle shaft, etc., which will not be expanded here.

[0050] As shown in the drawings, Figure 2 As shown in the drawings, in an embodiment, the bracket 40 is connected with the upper cover 11 in an interference manner. That is, the bracket 40 can be connected and fixed with the upper cover 11 in an interference fit manner, which can facilitate the assembly between the bracket 40 and the upper cover 11, and ensure the stability of the assembly of the bracket 40 on the upper cover 11.

[0051] As shown in the drawings, Figure 4 , Figure 5 As shown in the drawings, in an embodiment, the bracket 40 comprises two legs 41, and the impeller shaft 21 is rotatably installed between the two legs 41; the two legs 41 can be respectively inserted and fitted with the upper cover 11, and the bracket 40 is circumferentially limited in the upper cover 11 in this way. On the one hand, this can facilitate the connection between the bracket 40 and the upper cover 11, and on the other hand, it can also improve the stability of the bracket 40 when being assembled and limited on the upper cover 11. Here, the inner circumferential surface of the water inlet pipe 111 is formed with two insertion grooves 113, each insertion groove 113 is correspondingly arranged with each leg 41, the leg 41 can be inserted into the corresponding insertion groove 113, and the water inlet pipe is formed with a support inclined surface 114 at the position of the groove bottom of the insertion groove 113, and the support inclined surface 114 is used to support the leg 41 inserted into the insertion groove 113.

[0052] As shown in Figure 5 In an embodiment, the impeller shaft 21 is press-fitted between the two legs 41, and a guide surface 411 is formed on each leg 41 to guide the press-fitting of the impeller shaft 21 between the two legs 41, so that the impeller shaft 21 is rotatably connected to the two legs 41. That is, the press-fitting of the impeller shaft 21 between the two legs 41 is guided by the guide surface 411 on each leg 41, so that each leg 41 guides the press-fitting of the impeller 20 by the guide surface 411, which facilitates the press-fitting of the impeller 20 between the two legs 41 of the bracket 40.

[0053] As shown in Figure 1 In an embodiment, the two end surfaces 211 of the impeller shaft 21 are arc-shaped. That is, the impeller shaft 21 is rotatably connected to the leg 41 of the bracket 40 by the arc-shaped end surfaces 211, which facilitates the assembly of the impeller 20 to the bracket 40 and reduces the frictional resistance of the impeller 20 when rotating on the bracket 40.

[0054] As shown in Figure 4 , Figure 5 In an embodiment, the bracket 40 is provided with an abutting surface 42, and the upper cover 11 is provided with an abutting matching surface 115 that abuts against the abutting surface 42 to limit the insertion depth of the bracket 40 in the upper cover 11. The abutting matching surface 115 and the abutting surface 42 abut against each other, which limits the assembly depth of the bracket 40 on the upper cover 11, facilitating the assembly of the bracket 40 to the upper cover 11.

[0055] The application also provides a household appliance (not shown in the figure) comprising the above-mentioned micro diaphragm pump. Here, the household appliance can be a coffee machine, a floor cleaning machine, a water purifier, etc.

[0056] In summary, the micro diaphragm pump and the household appliance claimed in the application configure the impeller shaft 21 of the impeller 20 as a metal piece, which utilizes the structural characteristics of the metal material to avoid deformation and fracture of the impeller shaft 21 during demolding due to uneven stress in the demolding direction, so as to ensure that the size of the impeller shaft 21 meets the requirements, thereby meeting the use requirements of the assembly of the impeller 20 rotatably installed in the water inlet pipe 111, and improving the product qualification rate of the impeller 20.

[0057] The technical features of the above-mentioned embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0058] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a more specific and detailed manner, but should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A micro-diaphragm pump characterized by, The micro diaphragm pump comprises: a diaphragm pump body comprising an upper cover (11) to which a water inlet pipe (111) is connected and communicated; an impeller (20) rotatably installed in the water inlet pipe (111), the impeller (20) comprising an impeller shaft (21), a blade (22) and a magnetic element, the impeller shaft (21) being a metal piece, the blade (22) being formed on the impeller shaft (21) and the magnetic element in an injection molding manner; a Hall element arranged outside the water inlet pipe (111) for detecting the position of the magnetic element and generating a feedback signal.

2. The micro-diaphragm pump according to claim 1, characterized in that The impeller shaft (21) is configured as a stainless steel needle shaft.

3. The micro-diaphragm pump according to claim 1, wherein, The micro diaphragm pump further comprises a bracket (40) partially extending into the water inlet pipe (111) and connected with the upper cover (11); wherein the impeller shaft (21) is rotatably installed on the bracket (40) at a position inside the water inlet pipe (111).

4. The micro-diaphragm pump according to claim 3, characterized in that The bracket (40) is connected with the upper cover (11) in an interference manner.

5. The micro-diaphragm pump according to claim 3, wherein, The bracket (40) comprises two legs (41), and the impeller shaft (21) is rotatably installed between the two legs (41). The two legs (41) can be respectively inserted into the upper cover (11) to limit the bracket (40) in the circumferential direction of the upper cover (11).

6. The micro-diaphragm pump according to claim 3, wherein, An abutting surface (42) is formed on the bracket (40), and an abutting matching surface (115) is formed on the upper cover (11), the abutting matching surface (115) being capable of abutting against the abutting surface (42) to limit the insertion depth of the bracket (40) in the upper cover (11).

7. The micro-diaphragm pump according to claim 3, wherein, The bracket (40) comprises two legs (41), and the impeller shaft (21) is press-fitted between the two legs (41). Each of the legs (41) is provided with a guide surface (411) capable of guiding the impeller shaft (21) to be press-fitted between the two legs (41) to rotatably connect the impeller shaft (21) with the two legs (41).

8. The micro-diaphragm pump according to claim 7, characterized in that Both end surfaces (211) of the impeller shaft (21) are in the shape of a circular arc.

9. The micro-diaphragm pump according to claim 1, wherein, The water inlet pipe (111) is integrally connected with the upper cover (11).

10. A home appliance device, characterized by, The micro diaphragm pump of any one of claims 1 to 9.

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