Clothes processing equipment capable of intelligently adjusting level and control method

Abstract

The invention discloses clothes processing equipment capable of intelligently adjusting the level and a control method. The clothes processing equipment comprises a cavity formed in the clothes processing equipment and a weight which is placed in the cavity and can move freely. The pressure sensor is used for detecting the pressure of the four side walls and the bottom surface of the cavity; the control unit judges the inclination direction of the equipment according to the received pressure value and the gravity of the heavy object; the adjusting assembly is used for reversely adjusting the equipment according to the inclination direction of the clothes treating equipment, so that the equipment is horizontal. The horizontal state of the clothes treatment equipment is judged according to comparison of the pressure of the four side walls and the bottom face of the cavity and the gravity of the weight, the adjusting assembly is controlled by the control unit to conduct automatic height adjustment on all the positions in a targeted mode, simplicity and convenience are achieved, time and labor are saved, strenuous vibration and abrasion of the clothes treatment equipment in the using process are avoided, and the service life of the clothes treatment equipment is prolonged. And the user experience and the product competitiveness are improved.

Description

Technical Field

[0001] The present invention belongs to the field of clothing processing equipment, and in particular, relates to a clothing processing equipment with intelligent adjustment level and a control method. Background Art

[0002] Washing machines are essential household appliances for modern families, especially drum washing machines, which occupy a large share of the home appliance market due to their convenience, water saving, and less wear on the laundry. However, during use, the equipment needs to be kept level, otherwise it will cause severe vibration and component wear. This seriously affects the user experience and is not conducive to the long-term use of the product. Therefore, it is very important to reduce vibration and prevent balance failure. At present, the main solution to the level is that after-sales personnel perform manual operations during installation, and after long-term use, they need to go to after-sales for operation, which affects the user experience.

[0003] The Chinese patent application number 202211541685.1 discloses a washing machine with intelligent level adjustment and a control method thereof. By setting four water level sensors, four lifting feet and a control unit on the washing machine, the four water level sensors can intelligently identify the water level at each corner of the washing machine, and automatically adjust the height of each position through the four lifting feet. The automation is high and the leveling efficiency is fast, which greatly improves the user experience. However, the four water level sensors are fixedly installed on the inner wall of the outer barrel and are on the same reference plane. If the water level is low, the water level cannot be identified and the washing machine cannot be leveled; if the dehydration program is used alone, the horizontal state of the washing machine cannot be identified and the washing machine cannot be leveled.

[0004] The Chinese patent with application number 202211541685.1 discloses a washing machine with an automatic leveling function, which is achieved by setting a fixed seat at the bottom of the washing machine, setting a base at the bottom of the fixed seat, and setting a column and a connecting column between the fixed seat and the base. A pressure sensor is provided at the bottom of the fixed seat. When the pressure inside the column is insufficient, the pressure sensor controls the rotation of the blower, thereby supplementing the pressure inside the column, so that the fixed seat remains horizontal, thereby automatically adjusting the horizontal angle of the washing machine and prolonging the service life of the washing machine. However, the addition of a base at the bottom of the washing machine increases the space occupied by the washing machine, and the balance adjustment process requires the operation of the blower, which increases the possibility of noise generation and complicates the adjustment process.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a clothing processing device and a control method with intelligent adjustable level. The horizontal state of the equipment is judged by detecting the pressure of the four walls and the bottom and the gravity of the movable weight, and then the control unit controls the adjustment component to make corresponding adjustments to make it level, thereby avoiding severe vibration and wear of the equipment during use, and improving user experience and product competitiveness.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] According to a first aspect of the present invention, there is provided a clothes processing device with intelligent adjustment level, comprising:

[0009] A chamber is provided on the clothes processing device; a freely movable heavy object is placed in the chamber;

[0010] A pressure sensor is used to detect the pressure on the four side walls and bottom of the chamber;

[0011] The control unit receives the pressure value detected by the pressure sensor, compares the bottom surface pressure with the weight of the weight, and obtains the horizontal state of the device; compares the weight of the weight and the pressure values ​​of the four side walls to obtain the tilt direction of the clothing processing device;

[0012] The adjusting component adjusts the clothes processing device in the opposite direction according to the tilt direction of the clothes processing device, so that the difference between the bottom surface pressure and the gravity of the weight is kept within a certain range.

[0013] Furthermore, the pressure sensor is communicatively connected to the control unit.

[0014] Furthermore, the adjustment component includes a leveling foot and a driving unit arranged at the bottom of the clothing processing equipment body, the driving unit drives the lifting and lowering of the leveling foot, and the driving unit is communicatively connected with the control unit.

[0015] Another aspect of the present invention provides a control method for a clothes treating device with intelligent adjustment level, comprising:

[0016] S1: The clothes processing device is powered on, and the clothes processing device automatically starts the level adjustment program;

[0017] S2: pressure sensor detects the pressure on the four side walls and bottom of the chamber;

[0018] S3: The control unit receives the pressure value detected by the pressure sensor;

[0019] S4: deriving a tilt direction of the clothing processing device according to the gravity of the weight and the received pressure value;

[0020] S5: The control unit adjusts the leveling feet according to the tilt direction and the set program to achieve horizontal adjustment of the clothing processing device;

[0021] S6: After the adjustment is completed, steps S2 to S5 are repeated until the difference between the gravity of the weight and the pressure of the bottom surface is within the set range;

[0022] S7: End the leveling procedure and complete the leveling operation.

[0023] Optionally, in S1, if the clothes treating device does not automatically start the program for adjusting the level, the user starts the program for adjusting the level of the clothes treating device through the control unit.

[0024] Optionally, S4 includes:

[0025] S41: If the difference between the weight of the weight and the bottom surface pressure is not within the set range, it is determined that the clothing processing device is not in a horizontal state;

[0026] S42: The control unit obtains the tilt direction of the clothes processing device according to the gravity of the weight and the pressure values ​​of the four side walls.

[0027] Optionally, in S4, if the difference between the gravity of the weight and the bottom surface pressure is within a set range, S7 is executed: the leveling procedure is ended to complete the leveling operation.

[0028] Optionally, in the setting procedure in S6, if the judgment result is that the clothing processing device is tilted forward, the front leveling feet are adjusted to be raised or the rear leveling feet are adjusted to be lowered; if the judgment result is that the clothing processing device is tilted backward, the rear leveling feet are adjusted to be raised or the front leveling feet are adjusted to be lowered.

[0029] Optionally, in the setting procedure in S6, if the judgment result is that the clothing processing device is tilted to the right, the right leveling foot is adjusted to be raised or the left leveling foot is adjusted to be lowered; if the judgment result is that the clothing processing device is tilted to the left, the left leveling foot is adjusted to be raised or the right leveling foot is adjusted to be lowered.

[0030] Optionally, in S1, the clothes treating device automatically starts a clothes treating device level adjustment program every once in a while to adjust the level of the clothes treating device.

[0031] Optionally, in S1, if the clothes treating device does not automatically start the clothes treating device level adjustment program after a period of time, the user is prompted to adjust the level of the clothes treating device.

[0032] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: a chamber is arranged on the main body of the clothing processing device, and a movable heavy object is arranged in the chamber, and the pressure of the four side walls and the bottom of the chamber is detected. According to the pressure value and the gravity of the heavy object, the horizontal state and the tilt direction of the device can be intelligently and automatically determined. The control unit controls the lifting and lowering of the leveling feet according to the tilt direction to automatically adjust the level of the clothing processing device instead of manual adjustment, which saves time and labor and has a fast leveling speed, thereby avoiding severe vibration and wear of the equipment during use, and improving user experience and product competitiveness.

[0033] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0035] Figure 1 The control method of the clothes processing device with intelligent adjustment level of the present invention is shown in the flowchart Figure 1 ;

[0036] Figure 2 The control method of the clothes processing device with intelligent adjustment level of the present invention is shown in the flowchart Figure 2 ;

[0037] Figure 3 is a schematic diagram of a clothes processing device for intelligently adjusting the level of the clothes in the present invention;

[0038] Figure 4 It is a schematic diagram of communication between modules of the clothing processing equipment with intelligent adjustment level of the present invention.

[0039] In the figure: 1. Clothes processing equipment; 2. Heavy objects.

[0040] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0042] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In a first aspect of the present invention, there is provided a clothes processing device with intelligent level adjustment, the clothes processing device comprising a chamber, which is arranged on the clothes processing device; a freely movable heavy object is placed in the chamber;

[0045] A pressure sensor is used to detect the pressure on the four side walls and bottom of the chamber;

[0046] The control unit receives the pressure value detected by the pressure sensor, compares the bottom surface pressure with the weight of the weight, and obtains the horizontal state of the device; compares the weight of the weight and the pressure values ​​of the four side walls to obtain the tilt direction of the clothing processing device;

[0047] The adjusting component adjusts the clothes processing device in the opposite direction according to the tilt direction of the clothes processing device, so that the difference between the bottom surface pressure and the gravity of the weight is kept within a certain range.

[0048] Furthermore, the pressure sensor is communicatively connected with the control unit to detect the pressure on the four side walls and the bottom of the chamber; a weight 2 is placed in the chamber, and the tilt direction of the clothing processing device 1 is determined by the gravity of the weight 2 and the detected pressure value.

[0049] Specifically, a chamber is provided on the clothing processing device 1, and a freely movable weight 2 and a pressure sensor are provided in the chamber, and the pressure sensor is communicatively connected with the control unit. After the clothing processing device 1 is powered on, the pressure sensor is also powered on and works. The weight 2 rolls in the chamber due to the tilt problem of the clothing processing device 1. After the weight 2 stops, the pressure sensor detects the pressure of the four side walls and the bottom of the chamber to determine the tilt direction of the clothing processing device 1. The control unit adjusts the level of the clothing processing device 1 according to the determined horizontal state of the clothing processing device 1.

[0050] Furthermore, the adjustment assembly includes a leveling foot and a driving unit disposed at the bottom of the body of the laundry processing device 1. The driving unit drives the lifting and lowering of the leveling foot and is in communication connection with the control unit.

[0051] Specifically, when the control unit receives the pressure value detected by the pressure sensor and compares it with the gravity of the weight 2, it obtains the tilt direction of the clothing processing device 1. The control unit sends a signal to the corresponding drive unit according to the obtained tilt direction. After receiving the signal, the drive unit drives the leveling foot to rise and fall to adjust the level of the clothing processing device 1.

[0052] In a second aspect of the present invention, a control method for a clothes processing device with intelligent adjustment level is provided. Figure 1 and Figure 2 As shown, it includes steps S1 to S7.

[0053] In step S1 , the laundry treating apparatus is powered on, and the laundry treating apparatus automatically starts a level adjustment program.

[0054] Specifically, the clothes processing device 1 is powered on, and the control unit of the clothes processing device 1 automatically starts the clothes processing device 1 level adjustment program. At this time, the pressure sensor is powered on and starts working to detect the pressure of the four side walls and the bottom surface of the chamber arranged on the device.

[0055] Optionally, if the clothes treating device 1 does not automatically start the level adjustment program after the clothes treating device 1 is powered on, the clothes treating device 1 reminds the user to start the automatic level adjustment program to complete the work of adjusting the level of the clothes treating device 1.

[0056] Optionally, in step S1 , the clothes treating device 1 automatically starts a clothes treating device 1 level adjustment program every once in a while to adjust the level of the clothes treating device 1 .

[0057] Optionally, in step S1 , if the clothes treating device 1 does not automatically start the clothes treating device 1 level adjustment program after a period of time, the user is prompted to adjust the level of the clothes treating device 1 .

[0058] In step S2, the pressure sensor detects the pressure of the four side walls and the bottom surface.

[0059] In step S3, the control unit receives the detected pressure value;.

[0060] In step S4, the tilt direction of the clothes processing device is obtained according to the gravity of the weight and the received pressure value.

[0061] Optionally, a method for obtaining the tilt direction of the clothes processing device 1 is to execute steps S41 to S42.

[0062] In step S41, if the difference between the weight of the weight and the bottom surface pressure is not within the set range, it is determined that the clothes processing device is not in a horizontal state.

[0063] In step S42, the control unit obtains the tilt direction of the clothes processing device according to the gravity of the weight and the pressure values ​​of the four side walls.

[0064] In step S5: the control unit adjusts the four lifting feet according to the tilt direction and the set program to achieve horizontal adjustment of the clothes processing device.

[0065] Optionally, in step S5, the set procedure can be divided into: according to the comparison result of the gravity of the heavy object 2 and the pressure of the four side walls and the bottom of the chamber, it is concluded that the clothing processing device 1 tilts forward, and the control unit sends an adjustment signal to the drive unit, and the drive unit drives the rear leveling feet to lower or the front leveling feet to raise; according to the comparison result of the gravity of the heavy object 2 and the pressure of the four side walls and the bottom of the chamber, it is concluded that the clothing processing device 1 tilts backward, and the control unit sends an adjustment signal to the drive unit, and the drive unit drives the rear leveling feet to raise or the front leveling feet to lower.

[0066] Optionally, in step S6, the set program also includes: based on the comparison result of the gravity of the weight 2 and the pressure of the four side walls and the bottom surface of the chamber, it is concluded that the clothing processing device 1 is tilted to the right, and the control unit sends an adjustment signal to the drive unit, and the drive unit drives the leveling foot on the right side to rise or the leveling foot on the left side to lower; based on the comparison result of the gravity of the weight 2 and the pressure of the four side walls and the bottom surface of the chamber, it is concluded that the clothing processing device 1 is tilted to the left, and the control unit sends an adjustment signal to the drive unit, and the drive unit drives the amplitude of the left tilt to control the leveling foot on the left side to rise or the leveling foot on the right side to lower.

[0067] The control unit of this embodiment detects the pressure of the four side walls of the chamber and the ground, and the control unit analyzes the pressure of the four side walls and the bottom surface and the gravity of the weight 2 to determine that the clothing processing device 1 is in an unbalanced state, and automatically adjusts the height of each position in a targeted manner by adjusting the corresponding leveling feet, thereby solving the problem of the clothing processing device 1 shifting due to washing or the unevenness of the clothing processing device 1 during installation. It has a high degree of automation and a fast leveling efficiency, thereby improving user experience and product competitiveness.

[0068] Optionally, in step S4, if the difference between the gravity of the weight and the bottom surface pressure is within a set range, step S7 is executed to end the leveling procedure and complete the leveling operation.

[0069] In step S6, after the adjustment is completed, steps S2 to S5 are repeated until the difference between the gravity of the weight and the pressure of the bottom surface is within the set range.

[0070] In step S7, the leveling procedure ends and the leveling operation is completed.

[0071] In the specific use process, the user places the clothes processing device 1 in an appropriate position and powers on the clothes processing device 1. The clothes processing device 1 starts the automatic level adjustment program. If the clothes processing device 1 does not automatically start the automatic level adjustment program, the control unit reminds the user to start the automatic level adjustment program of the clothes processing device 1. The adjustment process is: detecting the pressure values ​​of the four side walls and the bottom surface of the chamber set on the main body of the clothes processing device 1, and according to the result of comparing the pressure values ​​of the four side walls and the bottom surface pressure with the gravity of the weight 2, it is determined whether the clothes processing device 1 is in a horizontal state, and the tilt direction of the clothes processing device 1 is obtained. The control unit controls the driving unit to adjust the lifting and lowering of the corresponding leveling feet according to the obtained tilt direction of the clothes processing device 1 to adjust the level of the clothes processing device 1.

[0072] If the clothes processing device 1 is not in a horizontal state after analysis, the set program is called according to the specific situation to adjust the corresponding feet so that the clothes processing device 1 is adjusted to a horizontal state. Specifically: if the clothes processing device 1 tilts forward, the control unit sends an adjustment signal to the drive unit, and the drive unit drives the rear leveling feet to lower or the front leveling feet to rise; if the clothes processing device 1 tilts backward, the control unit sends an adjustment signal to the drive unit, and the drive unit drives the rear leveling feet to rise or the front leveling feet to lower; if the clothes processing device 1 tilts to the right, the control unit sends an adjustment signal to the drive unit, and the drive unit drives the right leveling feet to rise or the left leveling feet to lower; if the clothes processing device 1 tilts to the left, the control unit sends an adjustment signal to the drive unit, and the drive unit drives the left leveling feet to rise or the right leveling feet to lower; if the clothes processing device 1 is in a horizontal state after analysis, the automatic adjustment program is turned off and the leveling work is ended.

[0073] After one adjustment is completed, the horizontal state of the clothes processing device 1 is detected again. If it is found that the clothes processing device 1 is still in a non-horizontal state, the adjustment is continued until the clothes processing device 1 is in a horizontal state, the horizontal adjustment program is terminated, and the leveling operation is completed; if the clothes processing device 1 is in a horizontal state after one adjustment is completed, the horizontal adjustment program is terminated, and the current leveling operation is completed. During the operation of the clothes processing device 1 and in subsequent use, the horizontal state of the clothes processing device 1 is periodically detected.

[0074] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details, for example, adjustment devices and control methods, etc. In some embodiments, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0075] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim.

[0076] Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment.The claims following the Detailed Description are thus hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

[0077] All features disclosed in this specification (including accompanying claims, abstracts and drawings) and all processes or units of any device disclosed in this specification (including accompanying claims, abstracts and drawings) may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless otherwise explicitly stated, each feature disclosed in this specification (including accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0078] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0079] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

[0080] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A clothes processing device with intelligent adjustment level, characterized in that: include, A chamber is provided on the clothes processing device; a freely movable heavy object is placed in the chamber; A pressure sensor is used to detect the pressure on the four side walls and bottom of the chamber; A control unit receives the pressure value detected by the pressure sensor, compares the bottom surface pressure with the gravity of the weight, and obtains the horizontal state of the device; Compare the gravity of the weight and the pressure values ​​of the four side walls to obtain the tilt direction of the clothes processing device; The adjusting component adjusts the clothes processing device in the opposite direction according to the tilt direction of the clothes processing device, so that the difference between the bottom surface pressure and the gravity of the weight is kept within a certain range.

2. The clothes treatment device with intelligent adjustment level according to claim 1, characterized in that: The pressure sensor is communicatively connected to the control unit.

3. The clothes treatment device with intelligent adjustment level according to claim 1, characterized in that: The adjustment component comprises a leveling foot arranged at the bottom of a box body of the clothing processing device and a driving unit, wherein the driving unit drives the lifting and lowering of the leveling foot; and the driving unit is in communication connection with the control unit.

4. A control method for a clothes processing device with intelligent adjustment level as claimed in any one of claims 1 to 3, characterized in that: include: S1, the clothes processing device is powered on, and the clothes processing device automatically starts the level adjustment program; S2, pressure sensor detects the pressure on the four side walls and bottom of the chamber; S3, the control unit receives the detected pressure value; S4. Determining the tilt direction of the clothing processing device according to the gravity of the weight and the received pressure value; S5, the control unit adjusts the leveling feet according to the tilt direction and the set program to achieve horizontal adjustment of the clothing processing device; S6, after the adjustment is completed, repeat steps S2 to S5 until the difference between the gravity of the weight and the pressure of the bottom surface is within the set range; S7, end the leveling procedure and complete the leveling operation.

5. The control method according to claim 4, characterized in that: In S1, if the laundry treatment device does not automatically start the program for adjusting the water level, the user starts the program for adjusting the water level of the laundry treatment device through the control unit.

6. The control method according to claim 4, characterized in that: In S4, S41: If the difference between the weight of the weight and the bottom surface pressure is not within the set range, it is determined that the clothing processing device is not in a horizontal state; S42: The control unit obtains the tilt direction of the clothes processing device according to the gravity of the weight and the pressure values ​​of the four side walls.

7. The control method according to claim 4, characterized in that: In the above S4, if the difference between the weight of the weight and the bottom surface pressure is within the set range, S7 is executed: the leveling procedure is ended to complete the leveling operation.

8. The control method according to claim 4, characterized in that: The setting procedure in S6, if the judgment result is that the clothes processing device is tilted forward, then the front leveling feet are adjusted to be raised or the rear leveling feet are adjusted to be lowered; if the judgment result is that the clothes processing device is tilted backward, then the rear leveling feet are adjusted to be raised or the front leveling feet are adjusted to be lowered.

9. The control method according to claim 5, characterized in that: In S1, the clothes treating device automatically starts a clothes treating device level adjustment program every once in a while to adjust the level of the clothes treating device.

10. The control method according to claim 9, characterized in that: In S1, if the clothes treating device does not automatically start the clothes treating device level adjustment program after a period of time, the user is prompted to adjust the level of the clothes treating device.

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