CN112568848A - Overflow switch and dish-washing machine - Google Patents

Abstract

The invention discloses an overflow switch and a dish washing machine. Pass through float connecting portion swing joint with float and float box and be a whole for float and float box constitute a module, install this module again, the installation procedure has been simplified, the probability that the installation made mistakes and spare part dropped is reduced, the precision of installation has been promoted, float connecting portion still has the guide effect when playing the connection effect, the float moves from top to bottom along float connecting portion, micro-gap switch control's accuracy has been improved, make overflow switch structure reaction more accurate sensitive, can in time solve the dish washer overflow problem effectively.

Description

Overflow switch and dish-washing machine

Technical Field

The invention belongs to the field of dish washing machines, and particularly relates to an overflow switch and a dish washing machine.

Background

The overflow protection system of the dish washer plays an important protection role when the dish washer has the faults of overflow, water seepage, water leakage and the like. If the overflow condition of the dishwasher cannot be quickly found and controlled, the overflowed water is likely to flow out of the dishwasher and onto the ground, posing a great safety threat to the floor, kitchen utensils and even the user's home, and therefore it is particularly important to have a safe and reliable overflow protection device. The existing overflow protection system consists of an overflow connecting groove, a water pool, an overflow floater, a floater box and a microswitch. The pond is dish washer bottom steel sheet, and water drainage pipe goes out the problem or dish washer appears leaking, the infiltration phenomenon, and during the water that flows can get into the bottom steel sheet of dish washer, the liquid level of bottom steel sheet risees, floats the float, touches micro-gap switch, accomplishes the alarm action.

However, the existing overflow switch assembly is installed on the plastic bottom cover of the dishwasher and is assembled and fixed in the pre-assembly process of the plastic bottom cover, which not only has more installation processes but also has complex operation steps, so that the installation of the overflow switch on the plastic bottom cover brings difficulties to the installation process; in addition, the float and the float box are assembled in a split manner, so that not only is the installation complicated, but also parts are easy to fall off during installation, and inconvenience is brought to installation and fixation.

Chinese patent application No. CN201410360625.9 discloses an overflow float box, comprising: float installation department and micro-gap switch installation department, the micro-gap switch installation department is a vertical flat board, and micro-gap switch installs on a side of this vertical flat board, and this side upper portion extends to covering micro-gap switch to one side and forms a breakwater, and the micro-gap switch installation department still is equipped with a breakwater, and this breakwater is located micro-gap switch contact one side, intersects with vertical flat board and breakwater two liang. The water baffle, the water retaining wall and the vertical flat plate form a waterproof space, so that the water leakage at the bottom of the dish washer is ensured to be incapable of flowing onto the microswitch, and the microswitch is protected from water. The microswitch installation part is provided with a microswitch wiring harness clamping groove and is located below the horizontal position of the microswitch wiring terminal, and water cannot flow back to the microswitch wiring terminal, so that safety accidents are avoided. However, the overflow switch cannot be installed on the bottom cover of the dish washing machine, the process is complex, and the problems that the float and the float box are installed in a split mode, the steps are complex, mistakes are prone to occurring, and parts fall off easily are solved.

The present invention has been made in view of this situation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an overflow switch and a dish washing machine.

In order to solve the technical problems, the invention adopts the technical scheme that:

an overflow switch comprises a float and a float box, wherein the float box is provided with a float connecting part extending for a certain length, and the float is limited and installed on the float connecting part and can move up and down along the length direction of the float connecting part.

Further, the floater is provided with a mounting opening which penetrates through the upper surface and the lower surface of the floater, the floater connecting part penetrates through the mounting opening to be movably connected with the floater, and the floater can move up and down along the floater connecting part.

Further, the float connecting portion comprises a guide section, the guide section is formed by extending the float connecting portion in the axial direction, the radial section size of the guide section is smaller than that of the mounting opening, and the float can move up and down along the guide section.

Further, the guide section has a first end close to the float box and a second end far from the float box, the first end extends for a certain length along the direction of the second end, and the guide section is at least partially arranged in an outward inclined expansion mode.

Further, the float box has a cover body with a closed top and a peripheral side wall formed by extending the edge of the cover body to a side perpendicular to the cover body, and the guide section is formed by partially extending the peripheral side wall of the float box.

Furthermore, the guide sections are of rod-shaped structures and formed by extending the peripheral side walls of the float boxes along the direction axially far away from the float boxes, and the guide sections are symmetrically distributed on the float boxes.

Further, the guide section includes spacing section, the one end of float box is kept away from at the guide section to spacing section setting, spacing section protrusion in guide section surface restricts the float and goes out by the guide section slippage.

Further, the spacing section is formed by the direction bending of the one end that the float box was kept away from to the float box by the direction section, but spacing section has radial telescopic lateral wall, spacing section passes the installing port and with the lower surface butt of float.

Furthermore, the floater box at least comprises a floater box side arm, and a connecting structure is arranged on the floater box side arm;

preferably, the float box side arm is formed by extending the peripheral side wall of the float box;

preferably, the connection structure is formed by a screw hole penetrating upper and lower surfaces of the float case-side arm.

The invention also provides a dish washing machine, which comprises a dish washing machine base and any overflow switch, wherein the dish washing machine base is provided with an assembly part which is fixedly connected with the floater box;

preferably, the mounting portion is formed by a boss partially extending from the dishwasher chassis.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

1. The float and the float box are movably connected into a whole through the float connecting part, so that the float and the float box form a module, and the module is installed, thereby simplifying the installation procedure, reducing the probability of installation errors and falling of parts and improving the installation accuracy.

2. The overflow switch is arranged on the dishwasher base instead of being fastened on the dishwasher bottom cover, so that the process assembly flow of the preassembly procedure is simplified, and the production efficiency is improved.

3. The floater connecting portion has a guiding effect while playing a connecting effect, the floater moves up and down along the floater connecting portion, the accuracy of micro switch control is improved, the reaction of the overflow switch structure is more accurate and sensitive, and the overflow problem of the dish washing machine can be timely and effectively solved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of the assembled structure of the present invention;

FIG. 2 is a schematic view of the float cage construction of the present invention;

FIG. 3 is a schematic view of the float construction of the present invention;

FIG. 4 is a schematic view of the bottom structure of the float of the present invention;

fig. 5 is a schematic view of the microswitch of the invention.

In the figure: 1. a bottom cover; 2. a base; 21. assembling a screw hole; 22. a boss; 3. a float box; 31. a cover body; 32. a peripheral side wall; 33. a guide section; 34. a limiting section; 35. a float cassette side arm; 351. a screw hole; 36. a microswitch mounting section; 361. a microswitch mounting post; 362. a microswitch support arm; 4. a float; 41. the bottom of the floater; 42. an installation port; 5. a microswitch; 51. a microswitch mounting hole.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 4, the overflow switch includes a float 4 and a float box 3, the float 4 is a plate-shaped structure having a thickness, the float box 3 is a box structure having a closed surface at one end, the float box 3 has a float connection portion extending a certain length, the float 4 is installed on the float connection portion in a limited manner and can move up and down along the length direction thereof, and the overflow switch specifically includes the following modes:

the first method is as follows:

the float case 3 includes a cover 31, and a float connecting portion is provided on the cover 31, the float connecting portion being a columnar structure or other structure having a certain length, the float connecting portion being fixed to a lower surface of the cover 31 facing the float by screws, and the float connecting portion being provided facing the float 4, the float 4 being movable up and down along the float connecting portion, that is, the float connecting portion has a guiding function for the float 4 while playing a connecting function.

The second method comprises the following steps:

the floater connecting part and the floater box 3 are integrally formed, namely the floater connecting part can be formed by extending the body of the floater box 3 to one side, the tail end of the floater connecting part is provided with a clamping groove, the floater 4 is clamped in the clamping groove to prevent the floater 4 from being separated from the floater connecting part, and when the dish washing machine overflows, the floater 4 floats upwards along the floater connecting part to touch the micro switch 5 to turn off a power supply. The structure has simple production process, and the floater connecting part is firm and durable, and has lower cost.

As shown in fig. 3 and 4, in the present invention, the float 4 has a mounting opening 42, the mounting opening 42 penetrates through the upper and lower surfaces of the float 4, the float connecting portion penetrates through the mounting opening 42 to be movably connected with the float, the float 4 can move up and down along the float connecting portion, the mounting opening 42 is located on the float bottom 41, the mounting opening 42 is in the form of a through hole, the through hole can be in the shape of a circular hole, a square hole or other irregular hole-shaped structures, and the float 4 has at least one mounting opening 42; alternatively, the mounting opening 42 may be an opening on the edge of the float 4, through which the float connecting portion can pass, and allow the float 4 to move up and down along the float connecting portion, which not only realizes the modularization of the float 4 and the float case 3, but also has simple structure and convenient operation, and is suitable for mass production.

As shown in fig. 2, the float connecting portion further has a guiding section 33, the radial cross-sectional dimension of the guiding section 33 is smaller than the radial cross-sectional dimension of the mounting opening 42, the guiding section 33 is located on one side of the float connecting portion away from the float box 3, the guiding section 33 corresponds to the mounting opening 42 up and down, and the specific embodiment of the float 4 that can move up and down along the guiding section 33 includes:

the first method is as follows:

the float box 3 comprises a closed cover body 31, the guide section 33 occupies a part of the float connecting part, namely, the part of the float connecting part far away from the cover body 31 is the guide section, and the float 4 moves up and down along the guide section, namely, the production requirement is reduced while the actual requirement is met.

The second method comprises the following steps:

the whole float connecting part can be used as the guide section 33, namely, the float 4 moves up and down along the guide section 33, so that the up-and-down movement space of the float 4 is enlarged, and the regulation range of the water overflow amount is enlarged.

The guide section 33 is at least partially obliquely arranged, the guide section 33 is provided with a first end close to the float box 3 and a second end far away from the float box 3, the first end extends for a certain length along the direction of the second end and expands outwards, and the guide section specifically comprises the following modes:

the first method is as follows:

the guide section 33 is perpendicular to the upper end surface of the cover body 31, and the floater 4 can float freely up and down along the guide section 33, so that the structure is simple.

The second method comprises the following steps:

the guide section 33 is arranged obliquely, the cover 31 has a perpendicular bisector perpendicular to the cover itself, and the distance from the first end of the obliquely arranged guide section 33 to the perpendicular bisector of the cover 31 is greater than the distance from the second end of the guide section 33 to the perpendicular bisector of the cover 31. The mode can make the connection of the float box 3 and the float 4 more labor-saving and convenient to install.

The third method comprises the following steps:

the guide section 33 is arranged obliquely, the cover body 31 has a perpendicular bisector perpendicular to the cover body 31 itself, and the distance from the first end of the obliquely arranged guide section 33 to the perpendicular bisector of the cover body 31 is smaller than the distance from the second end of the guide section 33 to the perpendicular bisector of the cover body 31. This arrangement results in the guide section having a radially outwardly directed spring force, so that the float 4 can be better clamped at the end of the guide section 33.

The method is as follows:

the distance of the perpendicular bisector of the guide section 33 to the lid 31 that the slope set up is along being close to the first end of float box 3 to the direction of keeping away from the second end of float box 3 grow gradually, this kind of mode of setting up makes the resistance that guide section 33 produced float 4 along with shifting up of float littleer, and along with the increase of overflow water, the increase of buoyancy, the floating speed of float also can be faster, can be when the overflow more sensitively control micro-gap switch, control effect is good.

As shown in FIG. 2, the float box 3 of the invention has a cover 31 with a closed top and a peripheral side wall 32 formed by extending the edge of the cover to a side perpendicular to the cover 31, the peripheral side wall 32 partially extends downwards to form a guide section 33, the guide section 33 corresponds to the mounting opening 42 up and down, the radial cross-sectional dimension of the guide section 33 is smaller than that of the mounting opening 42, the guide section 33 is ensured to smoothly pass through the mounting opening 42, the float 4 is movably connected with the guide section 33, and the float 4 can move up and down along the guide section 33.

Wherein the peripheral sidewall 32 has a plurality of extensions, such as: the peripheral side wall 32 extends in its entirety downwards to form a guide section 33, which guide section 33 is structurally stable but offers a relatively large resistance to the float 4.

In the invention, at least one guide section 33 is arranged on the float box 3, and when only one guide section 33 is arranged, the production cost is low, but the movable connection effect is poor.

Or, the guide sections 33 are symmetrically distributed on the float box 3, the floats 4 are provided with the installation openings 42 with the same number corresponding to the guide sections 33, and the distance between the symmetrical installation openings 42 is smaller than the distance between the corresponding opening parts of the guide sections 33 positioned at the symmetrical positions, so that the floats 4 can be clamped on the guide sections 33 with elasticity and can float upwards under the action of buoyancy. The arrangement mode has the advantages of good movable connection effect, relatively more stable structure and convenience in installation.

The guide section 33 comprises a limiting section 34, the limiting section 34 is arranged at one end, far away from the float box 3, of the guide section 33, the limiting section 34 protrudes out of the surface of the guide section 33, and the float is limited to slip out of the guide section. The setting mode of the limiting section 34 specifically includes:

the first method is as follows:

the limiting section 34 and the float connecting part are of a split structure, namely after the float connecting part penetrates through the mounting opening 42, a part with a limiting effect is fixed at the bottom end of the float connecting part in a screw or bonding mode, one end face of the part abuts against the lower surface of the float 4, the float 4 is clamped on the float connecting part, and the float 4 is prevented from sliding off from the tail part of the float connecting part.

Specifically, spacing section is the elastomeric element who has the elasticity, and limiting action's part is the protruding structure of rubber of independent fixed mounting on guide section 33, and this protruding structure of rubber radially contracts and passes installing port 42, then radially expands and connect float 4 joint on guide section 33, and the protruding structure of rubber and installing port 42's joint effect is better, simple to operate.

The second method comprises the following steps:

the limiting section 34 is a part of the body of the float guide section 33, the limiting section 34 is formed by radially protruding the side wall of the guide section 33, and the protruding side wall can pass through the mounting opening 42 to abut against the lower surface of the float 4 to realize clamping.

The third method comprises the following steps:

the limiting section 34 is bent and protruded towards the direction of the float box 3 from one end, far away from the float box 3, of the guide section 33 to form an inverted buckle structure, the limiting section 34 is provided with a side wall capable of extending and retracting in the radial direction, and the limiting section 34 penetrates through the mounting opening 42 and is abutted against the lower surface of the float 4. Spacing section 34 that the bending becomes includes the bending segment, and the bending segment has certain angle with direction section 33, and when the contained angle that bending segment and direction section 33 enclose was the acute angle, it was more convenient to install, and this kind of mounting means make full use of direction section 33 has saved the material, and production convenience.

The side surface of the float box 3 comprises one or more float box side arms 35, the float box side arms 35 and the float box can be of a split structure, namely the float box side arms 35 are fixedly arranged on the side surface of the float box 3 through screws or bonding and other fixing modes, or the float box side arms 35 are formed by extending the float box side walls and are used for connecting the base 2, so that the purpose of installing the overflow switch on the base of the dish washing machine is realized, and the pre-installation process of the bottom cover 1 is simplified.

The side arm 35 of the float box is at least provided with a connecting structure for connecting the base, the specific connecting structure is a clamping structure, and the clamping structure can be clamped on the base to realize the fixation of the float box 3 and the base; or the connecting structure is a screw hole 351 which penetrates through the upper surface and the lower surface of the float box side arm 35 and is further connected with the base 2 through a screw.

The present invention also provides a dishwasher comprising a base 2 and an overflow switch according to any one or combination of the above embodiments. The base 2 has an assembly portion which is fixedly connected with the float case side arm 35 in a manner of snap-fit, screw-connection, or adhesion.

Specifically, the assembling portion is provided with at least one assembling screw hole 21, the assembling screw hole 21 is used for connecting the side arm screw hole 351, and the assembling screw hole 21 and the side arm connecting screw hole 351 are fixedly connected through a screw, so that the connection between the float box 3 and the base 2 is realized.

The assembly portion is the boss 22 of setting on the dish washer base, and this boss 22 is partly extended by the dish washer base and forms, and the smooth level setting of boss 22 upper surface still is provided with assembly screw 21 on the upper surface, and screw fixed connection assembly screw 21 and connecting side arm screw 351 further realize the fixed of float box side arm 35 and boss 22.

As shown in fig. 1, 2, 3 and 5, the float 4 of the present invention is movably linked to the lower portion of the float case 3 by a guide section 33 formed by extending a peripheral side wall 32 of the float case 3, and is limited on the guide section 33 by a limiting portion 34, so as to prevent the float 4 from sliding off from the end of the guide section 33, the float case 3 is further provided with a microswitch mounting portion 36, the microswitch mounting portion 36 is formed by extending a side surface of the float case 3 into a vertical rectangular structure, the microswitch mounting portion 36 is provided with a microswitch mounting post 361 and a microswitch supporting arm 362, the microswitch mounting post 361 is provided at a diagonal position of the microswitch mounting portion 36, the microswitch mounting post 361 is formed by extending the microswitch mounting portion 36, the microswitch supporting arm 362 is formed by extending the microswitch mounting portion 36 in a direction perpendicular to the microswitch mounting portion 36, the microswitch 5 is provided with a microswitch mounting hole 51, micro-gap switch 5 is placed on micro-gap switch support arm 362 to with micro-gap switch mounting hole 51 correspond the nested micromotion switch erection column 361, realize micro-gap switch 5 and the fixed of float box 3, from this, float 4, float box 3, micro-gap switch 5 is connected and is become a module, and then through the screw with the assembly screw 21 fixed connection on screw 351 and the base 2 on the float box side arm 35, further realize the fixed connection of this module and base 2, the installation procedure of overflow switch has been simplified, and the production efficiency is improved.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. An overflow switch, its characterized in that: the overflow switch comprises a floater and a floater box, the floater box is provided with a floater connecting part which extends for a certain length, and the floater is installed on the floater connecting part in a limiting mode and can move up and down along the length direction of the floater connecting part.

2. An overflow switch as claimed in claim 1, wherein: the floater is provided with an installation opening, the installation opening penetrates through the upper surface and the lower surface of the floater, the floater connecting part penetrates through the installation opening to be movably connected with the floater, and the floater can move up and down along the floater connecting part.

3. An overflow switch as claimed in claim 2, wherein: the floater connecting part comprises a guide section, the radial section size of the guide section is smaller than that of the mounting opening, and the floater can move up and down along the guide section.

4. An overflow switch as claimed in claim 3, wherein: the guide section has a first end close to the float box and a second end far away from the float box, the first end extends for a certain length along the direction of the second end, and the guide section is at least partially arranged in an outward inclined expansion mode.

5. An overflow switch as claimed in any one of claims 1 to 4, wherein: the float box is provided with a cover body with a closed top and a peripheral side wall formed by extending the edge of the cover body to one side vertical to the cover body, and the guide section is formed by partially extending the peripheral side wall of the float box.

6. An overflow switch as claimed in claim 5, wherein: the guide sections are of rod-shaped structures and are formed by extending the peripheral side walls of the float boxes along the direction of axially keeping away from the float boxes, and the guide sections are symmetrically distributed on the float boxes.

7. An overflow switch as claimed in claim 2, wherein: the float connecting part comprises a limiting section, the limiting section is arranged at one end, far away from the float box, of the guide section, the limiting section protrudes out of the surface of the guide section, and the float is limited to be slipped out of the guide section.

8. An overflow switch as claimed in claim 7, wherein: the limiting section is formed by bending one end, far away from the float box, of the guide section in the direction of the float box, the limiting section is provided with a side wall capable of radially stretching, and the limiting section penetrates through the mounting opening and is abutted to the lower surface of the float.

9. An overflow switch as claimed in any one of claims 1 to 8, wherein: the floater box at least comprises a floater box side arm, and a connecting structure is arranged on the floater box side arm;

preferably, the float box side arm is formed by extending the peripheral side wall of the float box;

preferably, the connection structure is formed by a screw hole penetrating upper and lower surfaces of the float case-side arm.

10. A dishwasher, characterized by: the overflow switch comprises a dishwasher base and the overflow switch of any one of claims 1 to 9, wherein the dishwasher base is provided with an assembling part, and the float box is fixed on the assembling part;

preferably, the mounting portion is formed by a boss partially extending from the dishwasher chassis.

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