Ice maker and control method

Abstract

The invention provides an ice maker and a control method. The ice maker comprises a waterway system, a gravity sensor, a liquid level adjusting device and a control module. The waterway system comprises a water pan and an ice mold. And the ice mold sucks the water in the water pan and makes the water into ice. And the gravity sensor is used for measuring the weight of ice removed from the ice mold. The liquid level adjusting device is arranged on the water pan and comprises a first liquid level sensor and a second liquid level sensor. The first liquid level sensor is located above the second liquid level sensor. And the control module controls the ice mold to deice through the liquid level detected by the second liquid level sensor. And the height of the first liquid level sensor in the water pan is adjustable. The ice maker solves the technical problem of large energy loss of the ice maker.

Description

Technical Field

[0001] The present invention relates to the technical field of ice making, and in particular to an ice making machine and a control method thereof. Background Art

[0002] The existing ice maker consists of a machine room and an ice bucket. The machine room contains a refrigeration system, an ice mold, a water tray and a water system. The ice-making effect of the unit depends on the ice thickness sensor on the ice mold and the liquid level sensor fixed on the water tray. The ice thickness sensor controls the thickness of the ice, and the liquid level sensor controls the amount of water used in ice making. In this case, the water on the water tray must be much larger than the water required for ice making to ensure the success of ice making each time. When ice making is completed, the excess water will be discharged, causing energy loss. At the same time, it is also difficult to ensure the balance of the water tray during the installation process, which makes it difficult to control the amount of water in the water tray, resulting in the inability to remove ice or a large amount of ice-making water remaining, and the quality of ice making cannot be guaranteed. Therefore, the existing technology needs to be further developed. Summary of the invention

[0003] The purpose of the present invention is to overcome the above technical deficiencies and provide an ice maker and a control method to solve the technical problem of large energy loss of ice makers in the related art.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: an ice maker is provided, including: a water system, a gravity sensor, a liquid level regulating device, and a control module. The water system includes a water receiving tray and an ice mold. The ice mold absorbs water in the water receiving tray and makes the water into ice. The gravity sensor is used to measure the weight of ice removed from the ice mold. The liquid level regulating device is arranged on the water receiving tray, and the liquid level regulating device includes a first liquid level sensor and a second liquid level sensor. The first liquid level sensor is located above the second liquid level sensor. The control module controls the ice mold to remove ice through the liquid level detected by the second liquid level sensor. The first liquid level sensor is arranged at an adjustable height in the water receiving tray.

[0005] The liquid level regulating device further comprises: an regulating rack and a driving motor, wherein a rotating gear is arranged on the output shaft of the driving motor, and the rotating gear is meshed with the regulating rack; and a first liquid level sensor is connected to the output shaft of the driving motor.

[0006] The liquid level regulating device also includes: a mounting frame, the mounting frame is connected to the water receiving tray, and a guide groove is arranged on the mounting frame, and the guide groove extends along the moving direction of the first liquid level sensor.

[0007] The mounting frame further comprises a first side plate and a second side plate; the first side plate and the second side plate are arranged at intervals; and guide grooves are arranged on the first side plate and the second side plate.

[0008] The liquid level regulating device further includes: a first display component, the first display component is located outside the water receiving tray; the first display component is connected to the first liquid level sensor; the first display component is connected to the output shaft of the driving motor; The liquid level regulating device also includes: a second display component, which is located outside the water receiving tray; the second display component is connected to the second liquid level sensor, and the second display component is connected to the mounting bracket.

[0009] The mounting frame comprises: a display panel, on which a evacuation groove for evading the first display component is provided; and a second display component is connected to the display panel; The hanging plate is connected with the display panel, and the hanging plate is hung on the water receiving tray.

[0010] The water receiving tray comprises a first water receiving tray and a second water receiving tray; the first water receiving tray is located below the ice mold; the second water receiving tray is connected to the first water receiving tray; a water receiving pipe connected to the ice mold is arranged in the second water receiving tray; and the liquid level regulating device is connected to the second water receiving tray.

[0011] The liquid level regulating device also includes a water outlet pipe, which is connected to the water receiving pipe to control the water in the water receiving tray to be discharged through the water outlet pipe according to the measurement value of the first liquid level sensor.

[0012] The liquid level regulating device also includes an ice bucket, which is located below the ice mold; the ice mold is connected to the water receiving tray; the water receiving tray is rotatably arranged; and a gravity sensor is arranged on the ice bucket.

[0013] The control method includes: ice mold de-icing; gravity sensor detects the actual weight of de-icing; The difference between the actual weight and the set weight is determined to be the same as the set difference, and the position of the first liquid level sensor is adjusted.

[0014] The method for adjusting the position of the first liquid level sensor includes: when the difference between the actual weight and the set weight is greater than the first set difference, controlling the first liquid level sensor to move upward; when the difference between the actual weight and the set weight is less than or equal to the first set difference, and greater than or equal to the second set difference, controlling the position of the first liquid level sensor to remain unchanged; when the difference between the actual weight and the set weight is less than the first set difference, controlling the first liquid level sensor to move upward.

[0015] Beneficial effects: 1. The ice maker of the present invention comprises a water system, wherein the water system comprises a water receiving tray and an ice mold; the ice mold absorbs water in the water receiving tray and makes ice from the water; a gravity sensor is used to measure the weight of ice removed from the ice mold; a liquid level regulating device is arranged on the water receiving tray, wherein the liquid level regulating device comprises a first liquid level sensor and a second liquid level sensor; the first liquid level sensor is located above the second liquid level sensor; a control module, wherein the control module controls the ice mold to remove ice through the liquid level detected by the second liquid level sensor; the first liquid level sensor is arranged in an adjustable height in the water receiving tray.

[0016] 2. The ice maker of the present invention automatically adjusts the position of the liquid level sensor by controlling the rotation of the motor according to the detection of the gravity sensor, thereby ensuring the consistency of ice made by the ice maker.

[0017] 3. The ice-making machine of the present invention improves the utilization rate of ice-making water, reduces energy loss, and improves ice-making efficiency.

[0018] 4. The ice making machine of the present invention can realize the diversification of ice cube sizes according to customer needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the structure of an ice making machine used in an embodiment of the present invention; Figure 2 yes Figure 1 A local enlarged schematic diagram of part I in FIG. Figure 3 is a structural schematic diagram of a liquid level regulating device of an ice making machine used in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a first liquid level sensor of a liquid level regulating device of an ice maker used in an embodiment of the present invention when it is lowered; Figure 5 is a schematic diagram of the gear transmission structure of the ice maker used in the embodiment of the present invention; Figure 6 is a logic block diagram of an ice maker provided by an embodiment of the present invention; Figure 7 It is a schematic diagram of the interior of the second water receiving tray provided in an embodiment of the present invention.

[0020] The above drawings include the following reference numerals: 1. Water system; 11. Water receiving tray; 111. First water receiving tray; 112. Second water receiving tray; 12. Ice mold; 13. Water receiving pipe; 2. Gravity sensor; 3. Liquid level adjustment device; 31. First liquid level sensor; 32. Second liquid level sensor; 33. Water outlet pipe; 4. Control module; 5. Drive motor; 51. Rotating gear; 52. Adjusting rack; 6. Mounting frame; 61. Guide groove; 62. First side panel; 63. Second side panel; 71. First display component; 72. Second display component; 8. Display panel; 9. Avoidance groove; 10. Hanging plate; 101. Ice bucket. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0022] According to an embodiment of the present invention, an ice making machine is provided. Figures 1 to 7 , including a water system 1, the water system 1 includes a water receiving tray 11 and an ice mold 12; the ice mold 12 absorbs water in the water receiving tray 11 and makes the water into ice; a gravity sensor 2, used to measure the weight of ice removed by the ice mold 12; a liquid level regulating device 3, arranged on the water receiving tray 11, the liquid level regulating device 3 includes a first liquid level sensor 31 and a second liquid level sensor 32; the first liquid level sensor 31 is located above the second liquid level sensor 32; a control module 4, the control module 4 controls the ice mold 12 to remove ice through the liquid level detected by the second liquid level sensor 32; the first liquid level sensor 31 is arranged in an adjustable height in the water receiving tray 11.

[0023] With the above arrangement, the ice maker is used to measure the weight of the ice removed from the ice mold 12 through the gravity sensor 2, thereby judging whether the amount of water used for ice making is too much or too little, and controlling the rise or fall of the first liquid level sensor 31, and then adjusting the pressure according to the actual ice weight M. t , Set ice making weight M 0 , set weight difference M, liquid surface area S after water collection tray 11 is filled with water 表 , the density ρ of water, and the accurate height h to which the first liquid level sensor 31 needs to move is determined by calculation, so as to accurately control the height of the liquid level of water used for ice making; improve the rational use of water in the ice maker, reduce energy loss, and at the same time, automatically adjust the position of the liquid level sensor according to customer requirements to achieve diversified ice making, thereby solving the technical problem of large energy loss of ice makers in related technologies.

[0024] See also Figure 3 , Figure 4 , Figure 7 In the ice maker of this embodiment, the ice maker includes: an adjusting rack 52; a driving motor 5, a rotating gear 51 is arranged on the output shaft of the driving motor 5, and the rotating gear 51 is engaged with the adjusting rack 52 to make the rotating gear 51 rotate more smoothly; the first liquid level sensor 31 is connected to the output shaft of the driving motor 5 by a design that can complete the operation of driving the first liquid level sensor 31 to move together during the rotation of the rotating gear 51 on the adjusting rack 52.

[0025] See also Figure 1 and Figure 3 In the ice maker of this embodiment, the ice maker further includes: a mounting frame 6, wherein the mounting frame 6 is connected to the water receiving tray 11 so as to detect the height of water in the water receiving tray 11 through the first liquid level sensor 31 on the mounting frame 6, and a guide groove 61 is provided on the mounting frame 6, wherein the guide groove 61 guides the movement of the first liquid level sensor 31 and provides sufficient space for the movement of the first liquid level sensor 31 in the moving direction.

[0026] See also Figure 2 In the ice maker of this embodiment, the ice maker further includes: a mounting frame 6; the mounting frame 6 further includes a first side plate 62 and a second side plate 63; the first side plate 62 and the second side plate 63 are arranged at intervals to better fix the liquid level regulating device 3, thereby avoiding errors in water level detection caused by the instability of the liquid level regulating device 3; the first side plate 62 and the second side plate 63 are both provided with the guide groove 61.

[0027] See also Figure 1 and Figure 3 In the ice maker of this embodiment, the ice maker further includes: a first display component 71, which is used to display the water level information detected by the first liquid level sensor 31. The first display component 71 is located outside the water receiving tray 11; the first display component 71 is connected to the first liquid level sensor 31 to more accurately display the water level information and reduce the error; the first display component 71 is connected to the output shaft of the driving motor 5 so that the first liquid level sensor 31 and the first display component 71 can move synchronously.

[0028] See also Figure 1 , Figure 3 , Figure 7In the ice maker of this embodiment, the ice maker further includes: a second display component 72; the second display component 72 is located outside the water receiving tray 11; the second display component 72 is connected to the second liquid level sensor 32, and displays the water level information detected by the second liquid level sensor 32. The second display component 72 is connected to the mounting bracket 6 to more firmly fix the second liquid level sensor 32 and the second display component 72.

[0029] See also Figure 1 , Figure 3 , Figure 4 In the ice maker of this embodiment, the mounting frame 6 further includes: a display panel 8, on which a avoidance groove 9 for avoiding the first display component 71 is provided to facilitate the movement of the first display component 71; the second display component 72 is connected to the display panel 8; a hanging plate 10, which is connected to the display panel 8, and the hanging plate 10 is hung on the water receiving tray 11 to enhance the stability of the liquid level regulating device 3.

[0030] See also Figure 1 In the ice maker of this embodiment, the water receiving tray 11 includes a first water receiving tray 111 and a second water receiving tray 112; the first water receiving tray 111 is located below the ice mold 12 and is used to receive water used to make ice through the ice mold 12; the second water receiving tray 112 is connected to the first water receiving tray 111, and water flows into the second water receiving tray 112 after passing through the first water receiving tray 111, so that the liquid level sensor can more conveniently detect the water level in the second water receiving tray 112; the second water receiving tray 112 is provided with a water receiving pipe 13 connected to the ice mold 12 to form a water flow route loop, thereby reducing the loss of water energy.

[0031] See also Figure 1 In the ice maker of this embodiment, the liquid level regulating device further comprises a water outlet pipe 33. When there is too much water for making ice, the excess water can be discharged from the liquid level regulating device 3 through the water outlet pipe 33. The water outlet pipe 33 is connected with the water receiving pipe 13, and a part of the channel is shared, which saves materials and makes the liquid level regulating device 3 simpler. According to the measurement value of the first liquid level sensor 31, the water in the water receiving tray 11 is controlled. After detection, if there is too much water in the water receiving tray 11, the excess water can be discharged from the water receiving tray 11 through the water outlet pipe 33.

[0032] See also Figure 1In the ice maker of this embodiment, the liquid level regulating device 3 also includes an ice bucket 101. The ice bucket 101 is located below the ice mold 12 and can accurately catch the ice cubes removed from the ice mold 12. The ice mold 12 is connected to the water receiving tray 11. The water receiving tray 11 can recover the water that flows down from the ice mold 12 when it fails to make ice, and continue to recycle it, thereby reducing the loss of water resources; the water receiving tray 11 is rotatably arranged, and when the water receiving tray 11 is unstable or when necessary, it is convenient to stabilize or adjust it. Gravity sensor 2, the gravity sensor 2 is arranged on the ice bucket 101. The ice cubes are weighed in the ice bucket 101 by the gravity sensor 2.

[0033] See also Figure 1 and Figure 7 In the control method of this embodiment, the control method includes: the ice mold 12 receives the deicing water level information of the second liquid level sensor 32 to de-ice; the gravity sensor 2 detects the actual weight of the ice in the ice bucket after the ice mold 12 is de-iced; it is determined that the difference between the actual weight and the set weight is the relationship between the actual weight and the set difference, and the position of the first liquid level sensor 31 is adjusted.

[0034] With the above arrangement, the ice maker is used to measure the weight of the ice removed from the ice mold 12 through the gravity sensor 2, thereby judging the amount of water used for ice making, and controlling the position of the liquid level sensor, thereby controlling the height of the liquid level of the water used for ice making; the rational use of water in the ice maker is improved, and energy loss is reduced. At the same time, the position of the liquid level sensor can be automatically adjusted according to customer requirements to achieve diversified ice making, thereby solving the technical problem of large energy loss of ice makers in related technologies.

[0035] See also Figure 4 , Figure 6 , Figure 7 In the ice making machine of this embodiment, the method for controlling the position of the first liquid level sensor 31 includes: when the difference between the actual weight and the set weight is greater than the first set difference, controlling the first liquid level sensor 31 to move downward; when the difference between the actual weight and the set weight is less than or equal to the first set difference and greater than or equal to the second set difference, controlling the position of the first liquid level sensor 31 to remain unchanged; when the difference between the actual weight and the set weight is less than the first set difference, controlling the first liquid level sensor 31 to move upward.

[0036] With the above arrangement, when the difference between the actual weight and the set weight is greater than the first set difference, it indicates that too much water is actually used for ice making, resulting in waste. At this time, the first liquid level sensor 31 is controlled to move downward to lower the water level in the water receiving tray 11, thereby reducing water consumption.

[0037] When the difference between the actual weight and the set weight is less than or equal to the first set difference and greater than or equal to the second set difference, it indicates the amount of water used for ice making, and the position of the first liquid level sensor 31 is controlled to remain unchanged.

[0038] When the difference between the actual weight and the set weight is less than the first set difference, it means that the amount of water in the water receiving tray 11 is insufficient to make ice according to the set weight. The first liquid level sensor 31 is controlled to move upward to increase the amount of water in the water receiving tray 11 and improve the rational use of water in the ice maker.

[0039] The ice making machine of this embodiment is described as follows: Usually, the water on the water tray 11 of the ice maker must be much larger than the water required for ice making to ensure the success of each ice making. This will result in the remaining water to be discharged after the ice making is completed, resulting in energy loss. At the same time, the water tray 11 may be slightly unbalanced during the installation process, which may result in the inability to remove ice or a large amount of ice making water remaining, and the quality of ice making cannot be guaranteed.

[0040] When the ice maker is in the process of making ice, the second liquid level sensor 32 is installed at the low water level of the water receiving tray 11 and starts to detect at the same time. When the water level cannot be sensed, it means that the ice making is completed, and the ice mold 12 is controlled to start de-icing, and the gravity sensor 2 is synchronously controlled to detect the weight M before de-icing. n After defrosting, detect M m , then the weight of this de-icing is M t =M m -M n .

[0041] When the actual ice making weight M is found t Greater than the set ice making weight M 0 , and satisfies M t -M 0 >M, and time T>T 0 (The time set in this patent is 1s), indicating that the first liquid level sensor 31 is too high and the water storage volume of the water receiving tray 11 is large, then the driving motor 5 is started, and the first liquid level sensor 31 is driven to move down by rotating the gear 51 for h, where M is the set weight difference, S 表 is the surface area of ​​the liquid after the water receiving tray 11 is filled with water, and ρ is the density of water. The downward movement of the first liquid level sensor 31 satisfies the following formula: After the first liquid level sensor 31 moves downward, the water receiving tray 11 continues to draw water to make ice. When the actual ice weight M is found t Or is it greater than the set ice making weight M? 0 , and satisfies M t-M0>M, and time T>T0 (the time set in this patent is 1s), indicating that the first liquid level sensor 31 is still too high, the drive motor 5 is started, and the first liquid level sensor 31 is driven to continue to move down by rotating the gear 51, indicating that the water tray 11 is seriously tilted, and adjustment is recommended.

[0042] After the first liquid level sensor 31 moves downward, the water receiving tray 11 continues to draw water to make ice. When the actual ice weight M is found t Set ice making weight M 0 The weight difference, and -M<M t -M 0 <M, and time T>T 0 (The time set in this patent is 1s), indicating that the first liquid level sensor 31 meets the ice-making requirements and the ice-making machine does not need to be adjusted.

[0043] As the unit continues to make ice, the actual ice weight M t Set ice making weight M 0 The weight difference, and satisfy M t -M 0 <-M, and time T>T 0 (The time set in this patent is 1s), indicating that the position of the first liquid level sensor 31 is too low, the drive motor 5 is started, and the first liquid level sensor 31 is driven to continue to move upward by rotating the gear 51. Control the weight of each deicing to meet -M<M t -M 0 <M, to ensure the overall effect of ice making.

[0044] This patent provides an ice-making liquid level regulating device, which detects the weight of ice shedding of the unit each time through a gravity sensor 2 to control the position of the liquid level sensor to achieve ice-making stability. At the same time, the diversity of ice size can be achieved by adjusting parameters.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0047] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0048] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0049] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An ice making machine, characterized in that: include: A water system (1), the water system (1) comprising a water receiving tray (11) and an ice mold (12); the ice mold (12) absorbs water in the water receiving tray (11) and makes ice from the water; A gravity sensor (2) for measuring the weight of ice removed from the ice mold (12); A liquid level regulating device (3) is arranged on the water receiving tray (11), the liquid level regulating device (3) comprising a first liquid level sensor (31) and a second liquid level sensor (32); the first liquid level sensor (31) is located above the second liquid level sensor (32); A control module (4), wherein the control module (4) controls the deicing of the ice mold (12) through the liquid level detected by the second liquid level sensor (32); the first liquid level sensor (31) is arranged in an adjustable height in the water receiving tray (11).

2. The ice making machine according to claim 1, characterized in that: The ice making machine comprises: Adjusting rack (52); A driving motor (5), wherein a rotating gear (51) is arranged on an output shaft of the driving motor (5), and the rotating gear (51) is meshed with the adjusting rack (52); and the first liquid level sensor (31) is connected to the output shaft of the driving motor (5).

3. The ice making machine according to claim 2, characterized in that: The ice making machine also includes: A mounting frame (6), the mounting frame (6) being connected to the water receiving tray (11), the mounting frame (6) being provided with a guide groove (61), the guide groove (61) extending along the moving direction of the first liquid level sensor (31).

4. The ice making machine according to claim 3, characterized in that: The mounting frame (6) further comprises a first side plate (62) and a second side plate (63); the first side plate (62) and the second side plate (63) are arranged at intervals; and the guide groove (61) is provided on both the first side plate (62) and the second side plate (63).

5. The ice making machine according to claim 3, characterized in that: The ice making machine also includes: a first display component (71), the first display component (71) being located outside the water receiving tray (11); the first display component (71) being connected to the first liquid level sensor (31); the first display component (71) being connected to an output shaft of the drive motor (5); A second display component (72), the second display component (72) is located outside the water receiving tray (11); the second display component (72) is connected to the second liquid level sensor (32), and the second display component (72) is connected to the mounting frame (6).

6. The ice making machine according to claim 5, characterized in that: The mounting frame (6) comprises: a display panel (8), wherein the display panel (8) is provided with an avoidance groove (9) for avoiding the first display component (71); the second display component (72) is connected to the display panel (8); A hanging plate (10) is connected to the display panel (8), and the hanging plate (10) is hung on the water receiving tray (11).

7. The ice making machine according to claim 1, characterized in that: The water receiving tray (11) comprises a first water receiving tray (111) and a second water receiving tray (112); the first water receiving tray (111) is located below the ice mold (12); the second water receiving tray (112) is connected to the first water receiving tray (111); a water receiving pipe (13) connected to the ice mold (12) is arranged in the second water receiving tray (112); and the liquid level regulating device (3) is connected to the second water receiving tray (112).

8. The ice making machine according to claim 7, characterized in that: The ice maker also includes a water outlet pipe (33), which is connected to the water receiving pipe (13) so as to control the water in the water receiving tray (11) to be discharged through the water outlet pipe (33) according to the measurement value of the first liquid level sensor (31).

9. The ice making machine according to claim 1, characterized in that: The ice maker further comprises an ice bucket (101), wherein the ice bucket (101) is located below the ice mold (12); the ice mold (12) is connected to the water receiving tray (11); and the water receiving tray (11) is rotatably arranged.

10. The ice making machine according to claim 9, characterized in that The gravity sensor (2) is arranged on the ice bucket (101).

11. A control method, applicable to the ice making machine according to any one of claims 1 to 10, characterized in that: The control method comprises: Deicing the ice mold (12); The gravity sensor (2) detects the actual weight of the de-iced ice; It is determined that the difference between the actual weight and the set weight is in relation to the set difference, and the position of the first liquid level sensor (31) is adjusted.

12. The control method according to claim 11, characterized in that: The method for adjusting the position of the first liquid level sensor (31) comprises: When the difference between the actual weight and the set weight is greater than a first set difference, controlling the first liquid level sensor (31) to move downward; When the difference between the actual weight and the set weight is less than or equal to a first set difference, and greater than or equal to a second set difference, controlling the position of the first liquid level sensor (31) to remain unchanged; When the difference between the actual weight and the set weight is less than the first set difference, the first liquid level sensor (31) is controlled to move upward.

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