CN220893499U - Probe assembly, liquid level detection device and surface cleaning equipment - Google Patents

Abstract

The application relates to the technical field of surface cleaning equipment, in particular to a probe assembly, a liquid level detection device and surface cleaning equipment, which solve the problem that a probe is easy to fail or misjudge in detecting the liquid level when the surface cleaning equipment is in an inclined state. The probe assembly comprises a plurality of probes which are arranged in the dirt collection barrel, wherein the probes are respectively in one-to-one correspondence with the wheels, and the distance between the corresponding probes and the projection center points of the wheels at the bottom of the dirt collection barrel is smaller than a second preset distance; in the case where two probes among the plurality of probes are in contact with the liquid in the dirt collection tub, the two probes are electrically connected through the liquid. Because the plurality of wheels can limit the tilting direction of the surface cleaning device, the plurality of probes are respectively in one-to-one correspondence with the plurality of wheels, which is equivalent to arranging the probes in each tilting direction, and the problem that the probes are easy to generate detection liquid level failure or misjudgment when the surface cleaning device is in a tilting state is reduced.

Description

Probe assembly, liquid level detection device and surface cleaning equipment

Technical Field

The application relates to the technical field of surface cleaning equipment, in particular to a probe assembly, a liquid level detection device and surface cleaning equipment.

Background

As a cleaning tool, surface cleaning apparatuses are often used in households or workplaces, and are various, and with technological development, functions are becoming more and more perfect. Some of these surface cleaning apparatuses have a dirt collection tank, in which it is necessary to detect the liquid level in the dirt collection tank.

Conventional surface cleaning apparatus detect the liquid level in the dirt collection tub by providing 1 liquid level probe. When the surface cleaning apparatus is in an inclined state, there may be a case where the liquid level detection fails or erroneous judgment.

Disclosure of utility model

In view of the above, the embodiment of the application provides a probe assembly, a liquid level detection device and surface cleaning equipment, which solve the problems of failure and misjudgment of the liquid level detected by the probe when the surface cleaning equipment is in an inclined state.

In a first aspect, an embodiment of the present application provides a probe assembly for use in a surface cleaning apparatus comprising a dirt collection tub and a plurality of wheels, the plurality of wheels being disposed on a bottom of the dirt collection tub, the probe assembly comprising: the plurality of probes are arranged in the dirt collecting barrel, the distance between the probes and the bottom of the dirt collecting barrel is larger than a first preset distance, the plurality of probes are respectively in one-to-one correspondence with the plurality of wheels, and the distance between the corresponding probes and the corresponding wheels at the projection center point of the bottom of the dirt collecting barrel is smaller than a second preset distance; wherein, in the case that two probes are in contact with the liquid in the dirt collection barrel among the plurality of probes, the two probes are electrically connected through the liquid.

With reference to the first aspect, in certain implementations of the first aspect, a distance between the probe and an inner wall of the dirt collection barrel is less than or equal to a third preset distance.

With reference to the first aspect, in certain embodiments of the first aspect, the plurality of probes are arranged in a rectangular array, a trapezoidal arrangement, or a parallelogram arrangement.

With reference to the first aspect, in certain implementations of the first aspect, a projection of the probe at the bottom of the dirt collection tub has an overlapping portion with a projection of the wheel at the bottom of the dirt collection tub.

With reference to the first aspect, in certain implementations of the first aspect, the probe assembly includes four probes, the horizontal cross-sectional shape of the dirt collection barrel includes a rectangle, and the four probes are disposed near four corners of the rectangle, respectively; the four probes are equidistant from the bottom of the dirt collecting barrel.

With reference to the first aspect, in certain implementations of the first aspect, the surface cleaning apparatus includes a lower cover covering the upper opening of the dirt collection tub, the surface cleaning apparatus having at least one oblique direction, at least two probes being disposed at an edge region of the lower cover near the oblique direction.

With reference to the first aspect, in certain implementations of the first aspect, the probe assembly further includes: the protective shell is fixedly connected with a machine head assembly of the surface cleaning equipment and is provided with an opening, and the machine head assembly is arranged at the upper opening of the dirt collecting barrel; wherein, the probe sets up in the inside of protective housing, and liquid can be through the opening and the probe contact of protective housing.

With reference to the first aspect, in certain implementations of the first aspect, a side of the handpiece assembly proximate to the probe includes a reference plane and a protrusion, wherein a distance between the side of the protective housing distal from the handpiece assembly and the reference plane is greater than or equal to a distance between the protrusion and the reference plane.

In a second aspect, an embodiment of the present application provides a liquid level detection apparatus, including: the probe assembly of any one of the first aspects; and the control unit is electrically connected with the probe assembly.

In a third aspect, an embodiment of the present application provides a surface cleaning apparatus comprising: the liquid level detection device according to the second aspect.

The probe assembly comprises a plurality of probes which are all arranged in a dirt collecting barrel, wherein the distance between the probes and the bottom of the dirt collecting barrel is larger than a first preset distance, the plurality of probes are respectively in one-to-one correspondence with a plurality of wheels, and the distance between the corresponding probes and the projection center point of the wheels at the bottom of the dirt collecting barrel is smaller than a second preset distance; in the case where two probes among the plurality of probes are in contact with the liquid in the dirt collection tub, the two probes are electrically connected through the liquid. Because the plurality of wheels can limit the tilting direction of the surface cleaning device, the plurality of probes are respectively in one-to-one correspondence with the plurality of wheels, which is equivalent to arranging the probes in each tilting direction, and the problem that the probes are easy to generate detection liquid level failure or misjudgment when the surface cleaning device is in a tilting state is reduced.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing embodiments of the present application in more detail with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts.

Fig. 1 is a schematic diagram of an application scenario of a probe assembly according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram illustrating a side view of an application scenario of a probe assembly according to another embodiment of the present application.

Fig. 3 is a schematic structural diagram of the application scenario shown in fig. 2 from a top view.

Fig. 4 is a schematic diagram illustrating a structure of a side view of a working scene of the application scene shown in fig. 2.

Fig. 5 is a schematic diagram showing a probe arrangement in a probe assembly according to an embodiment of the present application.

Fig. 6 is a schematic diagram showing a probe arrangement in a probe assembly according to another embodiment of the present application.

Fig. 7 is a schematic view showing a probe arrangement in a probe assembly according to another embodiment of the present application.

Fig. 8 is a schematic structural diagram of a top view of a lower cover including four probes according to an embodiment of the present application.

Fig. 9 is a schematic diagram of an application scenario of a probe assembly according to another embodiment of the present application.

Fig. 10 is a schematic diagram of an application scenario of a probe assembly according to another embodiment of the present application.

Reference numerals:

100. A surface cleaning apparatus; 110. a handpiece assembly; 111. a lower cover; 112. a reference plane; 113. a protrusion; 120. a dirt collecting barrel; 121. a corner; 130. a probe; 140. a protective shell; 141. an opening; 142. a hollow structure; 150. and (3) wheels.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

As a cleaning tool, surface cleaning apparatuses are often used in households or workplaces, and are various, and with technological development, functions are becoming more and more perfect. Some of these surface cleaning apparatuses have a dirt collection tank, in which it is necessary to detect the liquid level in the dirt collection tank.

Conventional surface cleaning apparatus detect the liquid level in the dirt collection tub by providing 1 liquid level probe. When the surface cleaning apparatus is in an inclined state, there may be a case where the liquid level detection fails or erroneous judgment. For example, when the fluid level probe is on the lower side of the fluid level, it may not be possible to detect that the fluid level on the other side is too high, resulting in failure of the surface cleaning apparatus to stop functioning. When the liquid level probe is on the side with higher liquid level, the liquid level probe can be misjudged to be with higher liquid level, so that the surface cleaning equipment stops working in advance.

Fig. 1 is a schematic diagram of an application scenario of a probe assembly according to an embodiment of the present application.

As shown in fig. 1, the probe assembly is applied to a surface cleaning apparatus 100 including a soil collecting tub 120 and a plurality of wheels 150, each of the plurality of wheels 150 being disposed at a bottom of the soil collecting tub 120. Wherein, the probe subassembly includes: the plurality of probes 130 are arranged in the dirt collecting barrel 120, the distance between the probes 130 and the bottom of the dirt collecting barrel 120 is larger than a first preset distance, the plurality of probes 130 are respectively in one-to-one correspondence with the plurality of wheels 150, and the distance between the corresponding probes 130 and the projection center point of the wheels 150 at the bottom of the dirt collecting barrel 120 is smaller than a second preset distance; wherein, in case that two probes 130 among the plurality of probes 130 are in contact with the liquid in the soil collecting barrel 120, the two probes 130 are electrically connected through the liquid.

Specifically, the surface cleaning apparatus 100 includes a dirt collection tub 120 and a plurality of wheels 150, each of the plurality of wheels 150 being disposed at a bottom of the dirt collection tub 120. The soil collecting bucket 120 is a hollow container for collecting sewage. The shape of the soil collecting bucket 120 may be a cylinder, a cube, or other shapes, and the present application is not particularly limited. The wheels 150 may be universal wheels. The specific structure of the wheel 150 may be set according to the actual situation. The surface cleaning apparatus 100 may be a wet or wet-dry cleaner.

In some embodiments, surface cleaning apparatus 100 further includes a hand piece assembly 110. In some embodiments, handpiece assembly 110 includes a motor and/or a filter, etc. Handpiece assembly 110 can also include other structures or functional units, the specific structure of which can be set according to the actual situation, and the present application is not limited in particular.

The probe assembly includes a plurality of probes 130 disposed in the dirt collecting barrel 120 for detecting a liquid level in the dirt collecting barrel 120 and stopping the surface cleaning apparatus 100 when the liquid level in the dirt collecting barrel 120 reaches a preset liquid level threshold. The liquid in the dirt collecting barrel 120 may be one liquid or a liquid level of a mixture of a plurality of liquids such as water, sewage, sundries and the like. The probe 130 is any detection device capable of making an electrical connection in a liquid, for example, an electrically conductive structure such as an electrode rod. The distance between the probe 130 and the bottom of the dirt collection barrel 120 is greater than a first preset distance such that the probe 130 cannot be too close to the bottom of the dirt collection barrel 120 to achieve effective control of the liquid level in the dirt collection barrel 120.

In some embodiments, the first preset distance may be set according to a preset liquid level threshold and a distance from the bottom of the sump bucket 120. For example, the first preset distance may be 5cm, 10 cm, etc.

In some embodiments, the detection end of the probe is positioned below the location of the filter in the surface cleaning apparatus 100 to ensure that the liquid in the dirt collection tank 120 does not wet the filter.

The plurality of probes 130 are respectively in one-to-one correspondence with the plurality of wheels 150, and the distance between the projection center points of the probes 130 and the wheels 150 corresponding to each other at the bottom of the dirt collection tub 120 is smaller than the second preset distance. During movement of the surface cleaning apparatus 100, tilting may occur, for example, the surface cleaning apparatus 100 operates on a incline. The plurality of wheels can limit the tilting direction of the surface cleaning apparatus, so that by enabling the plurality of probes 130 to correspond to the plurality of wheels 150 one by one, which is equivalent to arranging the probes in each tilting direction, the problem that the probes are easy to fail or misjudge the detection liquid level when the surface cleaning apparatus is in a tilting state is reduced.

Illustratively, the surface cleaning apparatus includes two front wheels and two rear wheels, and when the surface cleaning apparatus is tilted forward, the tilt direction is the forward direction; when the surface cleaning device is inclined backwards, the inclination direction is the backward direction; when the surface cleaning equipment is inclined leftwards, the inclination direction is the leftwards direction; when the surface cleaning apparatus is tilted to the right, the tilt direction is the right direction.

The distance between the projection center points of the probes and the wheels corresponding to each other at the bottom of the dirt collecting barrel is smaller than the second preset distance, so that the probes corresponding to each other can be arranged near the wheels corresponding to each other. The second preset distance may be 1 cm by way of example, and the present application is not particularly limited thereto.

The probe assembly comprises a plurality of probes which are all arranged in the dirt collecting barrel, the distance between the probes and the bottom of the dirt collecting barrel is larger than a first preset distance, and under the condition that two probes in the plurality of probes are contacted with liquid in the dirt collecting barrel, the two probes are electrically connected through the liquid, so that the liquid level on at least one line can be detected instead of the liquid level of a single point, the detection range of the liquid level is increased, and the situations of failure and misjudgment of the liquid level detected when the surface cleaning equipment is in an inclined state are reduced.

In addition, as the plurality of wheels can limit the tilting direction of the surface cleaning device, the plurality of probes are respectively in one-to-one correspondence with the plurality of wheels, which is equivalent to arranging the probes in each tilting direction, and the problem that the probes are easy to generate detection liquid level failure or misjudgment when the surface cleaning device is in a tilting state is further reduced.

In some embodiments, the distance between the probe and the inner wall of the dirt collection barrel is less than or equal to a third predetermined distance. That is, the probe may be disposed closer to the inner wall of the dirt collection tub. Because the liquid level contacted with the inner wall of the dirt collecting barrel is generally the highest liquid level or the lowest liquid level, the liquid level close to the inner wall of the dirt collecting barrel can more accurately reflect the liquid level of the liquid in the dirt collecting barrel, so that the probe can more accurately detect the liquid level, the response of the probe to the liquid level change can be more sensitive, and the condition that the detection liquid level is invalid and misjudged when the surface cleaning equipment is in an inclined state is reduced. The third preset distance may be 1 cm, for example, and may be set according to practical situations.

In some embodiments, the plurality of probes are arranged in an array, and the distance between the probes and the inner wall of the dirt collection barrel is smaller than or equal to a preset distance threshold, so that the liquid level in the dirt collection barrel can be detected more accurately and sensitively, and the situations of liquid level failure and misjudgment detection when the surface cleaning equipment is in an inclined state are reduced.

Fig. 2 is a schematic structural diagram illustrating a side view of an application scenario of a probe assembly according to another embodiment of the present application. Fig. 3 is a schematic structural diagram of the application scenario shown in fig. 2 from a top view. Fig. 4 is a schematic diagram illustrating a structure of a side view of a working scene of the application scene shown in fig. 2.

In some embodiments, as shown in fig. 2 and 3, the number of wheels (not shown) is two, and the probe assembly includes two probes 130 corresponding to the two wheels 150 one by one, and the two probes 130 are disposed at a center position of one side of the head assembly 110 near the soil collecting barrel 120. The center position may be a position where a distance from a geometric center of a side of the head assembly 110 near the soil collecting barrel 120 is less than a preset distance. In some embodiments, the distance between the projected center points of the probes 130 and the wheels 150, which correspond to each other, at the bottom of the soil collecting bucket 120 is less than a second preset distance. The probe 130 includes a connection end for connection with the head assembly 110 and a detection end for detecting a liquid level in the dirt collection barrel 120. Since the two probes 130 are disposed at the center of the head assembly 110, as shown in fig. 4, when the surface cleaning apparatus 100 is tilted, the liquid level detected by the probes 130 is not the highest liquid level (the highest liquid level is the liquid level contacting the dirt collecting barrel 120 at the rightmost side as shown in fig. 4), and thus the distance between the detection ends of the two probes 130 and the bottom of the dirt collecting barrel 120 can be set smaller (i.e., the length of the probes 130 extending into the dirt collecting barrel 120 is longer), so that the liquid level when the two probes 130 are tilted can be detected in time, so as to more accurately determine whether the liquid level reaches the preset liquid level threshold value when the surface cleaning apparatus 100 is tilted.

Fig. 5 is a schematic diagram showing a probe arrangement in a probe assembly according to an embodiment of the present application. Fig. 6 is a schematic diagram showing a probe arrangement in a probe assembly according to another embodiment of the present application. Fig. 7 is a schematic view showing a probe arrangement in a probe assembly according to another embodiment of the present application.

In some embodiments, as shown in fig. 5-7, the number of wheels (not shown) may also be three, four, or more. The plurality of wheels 150 and the plurality of probes 130 are in one-to-one correspondence, and the distance between the projected center points of the probes 130 and the wheels 150, respectively, at the bottom of the soil collecting tub 120 is smaller than a second preset distance. The plurality of probes 130 may be in an array arrangement, and the array arrangement may be at least one of a linear array arrangement, a rectangular array arrangement, or a circumferential array arrangement. Illustratively, as shown in fig. 2 and 3, the probe assembly includes two probes 130, and the two probes 130 may be arranged in a linear array. Illustratively, fig. 5 shows a schematic layout of the probe 130 when the horizontal cross-sectional shape of the dirt collection tub 120 is circular or approximately circular. Illustratively, as shown in FIG. 5, the plurality of probes 130 may be arranged in a circumferential array. Fig. 6 is a schematic view showing an arrangement of the probe 130 in a case where the horizontal sectional shape of the soil collecting barrel 120 is rectangular or nearly rectangular. Illustratively, as shown in fig. 6, the plurality of probes 130 may be arranged in a rectangular array. Fig. 7 is a schematic view showing an arrangement of the probe 130 in a case where the horizontal sectional shape of the soil collecting barrel 120 is hexagonal or approximately hexagonal. Illustratively, as shown in fig. 7, the probe 130 may be disposed at a midpoint of a corner 121 or a side of the horizontal sectional shape of the soil collecting bucket 120 to more uniformly detect the liquid level. The shape approximating a circle, rectangle, hexagon or other shape may be a shape in which chamfering, rounding or edge portion bulging or recessing is performed on the basis of the circle, rectangle, hexagon or other shape. The plurality of probes 130 are arranged in an array, so that the detection of the liquid level can be more uniformly realized, and the situations of liquid level failure and misjudgment in detection when the surface cleaning equipment is in an inclined state are reduced. This arrangement also enables the arrangement of the probes to be adapted to various shaped dirt collection barrels.

In some embodiments, the plurality of probes may be in a rectangular array arrangement, a trapezoidal arrangement, or a parallelogram arrangement. The rectangular array, the trapezoidal array, the parallelogram array may be an array that approximates a rectangle, a trapezoid, a parallelogram, i.e. there may be some error. This arrangement allows for a surface cleaning apparatus with multiple arrangements of wheels, better enabling level detection.

Fig. 8 is a schematic structural diagram of a top view of a lower cover including four probes according to an embodiment of the present application.

Referring to fig. 8, the projection of the probe 130 at the bottom of the soil collecting barrel 120 has an overlapping portion with the projection of the wheel 150 (the wheel on the other side of the bottom of the soil collecting barrel 120 is shown in fig. 8 by a dotted line frame) at the bottom of the soil collecting barrel 120. The arrangement is such that the probe is arranged in a position directly above the wheel, and when the surface cleaning apparatus is tilted, the reaction to the tilted liquid level is more sensitive and the liquid level in the dirt collection tub is more accurately detected.

Referring to fig. 1 and 8, the probe assembly includes four probes 130, the horizontal sectional shape of the soil collecting barrel 120 includes a rectangle, the four probes are respectively disposed at positions near four corners 121 of the rectangle, and the four probes 130 are equidistant from the bottom of the soil collecting barrel 120. The horizontal cross-sectional shape of the water collecting tub 120 may include a rectangular shape, which is approximately rectangular after being rounded, or the edge portion thereof is protruded or recessed. When the horizontal cross-sectional shape is rectangular, four probes are respectively disposed at positions near four corners 121 of the rectangle, i.e., vertices of the rectangle. In some embodiments, the surface cleaning apparatus includes a lower cover 111, and four probes 130 are disposed on a side of the lower cover 111 adjacent to the dirt collection tub 120. When the horizontal cross-sectional shape is approximately rectangular, four probes are respectively disposed at positions near four corners 121 of the rectangle, that is, bent corners of the vertex of the rectangle after being subjected to chamfering or rounding or the like. This arrangement makes the placement of the probe closer to the edge of the shape of the water collection tub, more sensitive to the changing reaction of the liquid level. The probes are arranged at the corners of the water collecting barrel with the rectangular horizontal cross section, each side comprises two probes, and when the surface cleaning equipment is inclined, the probes are more sensitive to the response of liquid level change, so that the liquid level can be detected more accurately.

In addition, the probes at each corner are shared by two adjacent edges, so that the utilization rate of the probes is improved, and the liquid level can be accurately detected by using fewer probes. In some embodiments, a plurality of probes may be provided according to shape characteristics of the water collecting tub. For example, other water collection tanks of horizontal cross-sectional shapes may also be provided with probes at each corner. For example, when the horizontal sectional shape of the water collecting tub is a trapezoid or approximately a trapezoid, a probe may be provided at each corner thereof.

Because the two probes can be electrically connected through the liquid when the two probes are simultaneously contacted with the liquid, the distance between the two probes and the bottom of the dirt collection barrel can be set to be equal, and the overlong or too short of a certain probe is avoided. The distance between the probes and the bottom of the dirt collecting barrel is set to be equal, when the liquid level in the dirt collecting barrel is inclined, at least two probes can contact the liquid level as much as possible, and the risk of misjudgment caused by miscontact due to different distances between the probes and the bottom of the dirt collecting barrel is reduced.

In some embodiments, the surface cleaning apparatus includes four wheels and four probes, the surface cleaning apparatus having four wheels being tilted in four directions.

Fig. 9 is a schematic diagram of an application scenario of a probe assembly according to another embodiment of the present application.

As shown in fig. 9, the surface cleaning apparatus includes a lower cover 111, the upper opening surface cleaning apparatus of the lower cover 111 covering the soil collecting barrel 120 has at least one inclined direction, at least two probes 130 (the remaining probes 130 are not shown) are disposed at an edge region of the lower cover 111 near the inclined direction, at least two wheels 150 are in one-to-one correspondence with the at least two probes 130, and a distance between projected center points of the probes 130 and the wheels 150 corresponding to each other at the bottom of the soil collecting barrel 120 is less than a second preset distance. The edge region may be a region having a distance from the inner wall of the dirt collection tub within a preset threshold.

In some use scenarios, the surface cleaning apparatus is easily tilted in one or more directions, for example, the surface cleaning apparatus is used on a plane having a gradient or on uneven ground. At least two probes 130 are arranged in the edge area of the machine head assembly, which is close to any one of the inclined directions, and when the dirt collecting barrel is inclined, the probes 130 can timely and accurately reflect the liquid level condition in the dirt collecting barrel.

In some embodiments, the surface cleaning apparatus includes four wheels and four probes in one-to-one correspondence with the four wheels, the surface cleaning apparatus having the four wheels being tilted in four directions.

Fig. 10 is a schematic diagram of an application scenario of a probe assembly according to another embodiment of the present application.

Referring to fig. 1 and 10, in some embodiments, the probe assembly further comprises: the protective shell 140 is fixedly connected with the machine head assembly 110 of the surface cleaning device 100, the protective shell 140 is provided with an opening 141, and the machine head assembly 110 is arranged at the upper opening of the dirt collection barrel 120; the probe 130 is disposed inside the protective case 140, and the liquid can contact with the probe 130 through the opening 141 of the protective case 140 to realize liquid level detection. In some embodiments, opening 141 may be located at an end remote from handpiece assembly 110. The probe 130 may be disposed inside the protective case 140 and extend toward the opening 141. The specific structure of the protective case 140 may be set according to practical requirements, and embodiments of the present application are not limited in particular.

In some embodiments, the protective case 140 further includes a hollow structure 142, and the probe 130 is received in the hollow structure 142. When the liquid level rises to the detection end of the probe 130, the liquid in the dirt collecting barrel 120 can contact the probe 130 through the opening 141 and the hollow structure 142, so as to realize liquid level detection. In some embodiments, the protective case 140 is threadably coupled to the probe 130. In other embodiments, the protective case 140 may also be connected to the probe 130 by a fixed connection or a snap connection. The connection manner between the protective case 140 and the probe 130 may be set according to practical requirements, and the embodiment of the application is not limited in particular. According to the embodiment of the application, the protective shell is arranged to protect the probe, prevent the probe from being damaged and prolong the service life of the probe.

In some embodiments, referring to fig. 10, a side of handpiece assembly 110 proximate probe 130 includes a datum plane 112 and a protrusion 113, wherein a distance between a side of protective housing 140 distal from handpiece assembly 110 and datum plane 112 is greater than or equal to a distance between protrusion 113 and datum plane 112. The bump 113 may be a bump structure of the side of the head assembly 110 near the probe 130 except for the protective case 140. Datum plane 112 is any plane of handpiece assembly 110 that is proximal to the side of probe 130 and distal to boss 113. Since the distance between the side of the protective case 140 away from the head assembly and the reference plane 112 is greater than or equal to the distance between the protrusion 113 and the reference plane 112, the protective case 140 can serve as a support post to support the head assembly 110 on an arbitrary plane when the head assembly 110 is removed. In some embodiments, head assembly 110 includes a lower cover, and the protective shell and the lower cover of the head assembly may be integrally formed or may be assembled after being manufactured separately.

The embodiment of the application also provides a liquid level detection device. The liquid level detection device includes: the probe assembly of any of the above embodiments, and a control unit, wherein the control unit is electrically connected to the probe assembly. The composition, structure, and advantages of the probe assembly are described in detail above and will not be described in detail herein. The control unit may comprise a computing unit, which may take the form of essentially any suitable type of processor Circuit or microcomputer, for example, a Circuit for digital signal processing (e.g., a digital signal processor), a central processing unit (Central Processing Unit, CPU), a processing Circuit, a processor, an Application-specific integrated Circuit (ASIC), a microprocessor, etc.

The liquid level detection device provided by the embodiment of the application comprises a plurality of probes which are arranged in the dirt collection barrel, wherein the distance between the probes and the bottom of the dirt collection barrel is larger than a first preset distance, and under the condition that two probes in the plurality of probes are contacted with liquid in the dirt collection barrel, the two probes are electrically connected through the liquid, so that the liquid level on at least one line can be detected instead of the liquid level of a single point, the detection range of the liquid level is increased, and the situations of liquid level failure and misjudgment detection detected when the surface cleaning equipment is in an inclined state are reduced.

In addition, as the plurality of wheels can limit the tilting direction of the surface cleaning device, the plurality of probes are respectively in one-to-one correspondence with the plurality of wheels, which is equivalent to arranging the probes in each tilting direction, so that the problem that the probes are easy to generate detection liquid level failure or misjudgment when the surface cleaning device is in a tilting state is solved.

In some embodiments, the control unit is connected to the plurality of probes through wires, respectively, and the control unit detects the liquid level of the liquid in the dirt collection barrel by detecting the on-off state of a loop between the liquid in the dirt collection barrel and the plurality of probes. In some embodiments, the control unit can detect the resistance value and/or the relation between the resistance value and time among the plurality of probes, and when the resistance value meets a preset condition, it is determined that electrical connection is achieved between at least two probes, that is, the liquid level of the liquid in the dirt collection barrel reaches a preset liquid level threshold. The relation between the detection resistance value and time can be used for reducing interference of liquid drops scattered accidentally on the liquid level detection process of the probe. In some embodiments, the preset conditions include that the resistance value reaches a preset resistance threshold and reaches a state to be maintained for a certain time, and the preset conditions may be set according to actual requirements, which is not limited in the embodiments of the present application.

In some embodiments, the control unit is capable of being electrically or communicatively connected to a motor in the surface cleaning apparatus, and when the control unit detects that the resistance value between the at least two probes reaches a preset resistance threshold and reaches a state for a certain time, the control unit controls the motor to stop working. In some embodiments, the control unit of the probe assembly is used to control the motor to stop working and also to prevent the liquid in the dirt collection barrel from entering certain structures or functional units in the head assembly, such as the motor or the filter device, so as not to cause damage. For example, when the probe assembly detects that the liquid level reaches a preset liquid level threshold, the control unit initiates a water stop program to deactivate the surface cleaning apparatus. The liquid level detection device can also comprise an alarm which is electrically connected with the control unit. When the liquid level in the dirt collecting barrel reaches a preset liquid level threshold value, the control unit controls the alarm to alarm. Other specific structures of the liquid level detection device can be set according to actual requirements, and the liquid level detection device is not particularly limited.

Referring to fig. 1, an embodiment of the present application also provides a surface cleaning apparatus 100. The surface cleaning apparatus includes: the liquid level detection device mentioned in the above embodiment. The components, structures, advantages, etc. of the liquid level detection device have been described in detail above, and will not be described here again. Surface cleaning apparatus 100 also includes other structures such as head assembly 110, dirt collection barrel 120, and the like. Other specific structures of the surface cleaning apparatus may be set according to actual requirements, and the present application is not particularly limited. The probe assembly provided by the embodiment of the application is used by the surface cleaning equipment, and comprises a plurality of probes which are all arranged in the dirt collecting barrel, wherein the distance between the probes and the bottom of the dirt collecting barrel is larger than a first preset distance, and under the condition that two probes in the plurality of probes are contacted with liquid in the dirt collecting barrel, the two probes are electrically connected through the liquid, so that the liquid level on at least one line can be detected instead of the liquid level of a single point, the detection range of the liquid level is increased, and the situations of liquid level failure and misjudgment detection when the surface cleaning equipment is in an inclined state are reduced.

In addition, as the plurality of wheels can limit the tilting direction of the surface cleaning device, the plurality of probes are respectively in one-to-one correspondence with the plurality of wheels, which is equivalent to arranging the probes in each tilting direction, so that the problem that the probes are easy to generate detection liquid level failure or misjudgment when the surface cleaning device is in a tilting state is solved.

The basic principles of the present application have been described above in connection with specific embodiments, but it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be construed as necessarily possessed by the various embodiments of the application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims (10)

1. A probe assembly for use with a surface cleaning apparatus comprising a dirt collection tub and a plurality of wheels, a plurality of the wheels being disposed on a bottom of the dirt collection tub, the probe assembly comprising:

The plurality of probes are arranged in the sewage collection barrel, the distance between the probes and the bottom of the sewage collection barrel is larger than a first preset distance, the plurality of probes are respectively in one-to-one correspondence with the plurality of wheels, and the distance between the corresponding probes and the corresponding wheels at the projection center point of the bottom of the sewage collection barrel is smaller than a second preset distance;

Wherein, in the case that two probes are in contact with the liquid in the dirt collection barrel among the plurality of probes, the two probes are electrically connected through the liquid.

2. The probe assembly of claim 1, wherein a distance between the probe and the inner wall of the dirt collection barrel is less than or equal to a third predetermined distance.

3. The probe assembly of claim 2, wherein a plurality of the probes are arranged in a rectangular array, a trapezoidal arrangement, or a parallelogram arrangement.

4. The probe assembly of claim 1, wherein a projection of the probe at the bottom of the dirt collection barrel and a projection of the wheel at the bottom of the dirt collection barrel have overlapping portions.

5. The probe assembly of claim 1, wherein the probe assembly comprises four probes, the horizontal cross-sectional shape of the dirt collection barrel comprises a rectangle, and the four probes are respectively arranged near four corners of the rectangle; the four probes are equal to the distance between the bottom of the dirt collecting barrel.

6. The probe assembly of any one of claims 1 to 5, wherein the surface cleaning apparatus comprises a lower cover covering an upper opening of the dirt collection tub, the surface cleaning apparatus having at least one oblique orientation, at least two of the probes being disposed at an edge region of the lower cover proximate the oblique orientation.

7. The probe assembly of any one of claims 1 to 5, further comprising:

The protective shell is fixedly connected with a machine head assembly of the surface cleaning equipment and is provided with an opening, and the machine head assembly is arranged on the upper opening of the dirt collection barrel;

wherein, the probe set up in the inside of protective housing, the liquid can pass through the opening of protective housing with the probe contact.

8. The probe assembly of claim 7, wherein a side of the handpiece assembly proximate to the probe includes a datum plane and a protrusion, wherein a distance between a side of the protective housing distal from the handpiece assembly and the datum plane is greater than or equal to a distance between the protrusion and the datum plane.

9. A liquid level detection apparatus, comprising:

The probe assembly of any one of claims 1 to 8;

And the control unit is electrically connected with the probe assembly.

10. A surface cleaning apparatus comprising: the fluid level detection apparatus of claim 9.