Dish washing machine water level detection mechanism and detection method thereof

Abstract

The water level detection mechanism comprises a washing pump, a water tank and a drainage pump, a water outlet of the washing pump is communicated with the water tank through a waterway channel, a water inlet of the drainage pump is communicated with the water tank, the water level detection mechanism is characterized by further comprising a water level detection device, and the water level detection device is fixedly installed on the waterway channel. The water level detection device is closed under the water outlet pressure of the washing pump to generate and output a detection signal, and then the current water level state of the water outlet tank is fed back. The water level detection device is additionally arranged in the water outlet connecting pipeline of the washing pump of the dish-washing machine, the water level detection device detects the water volume through the water pressure, namely the water pressure generated by working of the washing pump triggers the water level detection device to feed back a signal, the water use condition in the dish-washing machine is known more accurately, and the water use condition of the dish-washing machine is protected in a reinforced mode; water overflow can be prevented, dry burning caused by water shortage can also be prevented, the protection effect of water for the dish-washing machine is enhanced, and the reliability of the dish-washing machine is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and in particular to a dishwasher water level detection mechanism and a detection method thereof. Background Art

[0002] When using a dishwasher, water is an essential cleaning substance. However, it is particularly important to control the amount of water. Too much water will cause overflow, while too little water will cause the dishwasher to fail to operate normally, or even cause the heating tube to dry out, leading to a fire. Therefore, in addition to the commonly used flow meters and water level switches for dishwasher water volume control, a dishwasher water level detection mechanism and its detection method are reintroduced to distinguish it from the traditional single control method and increase double protection.

[0003] Therefore, further improvements are necessary. Summary of the invention

[0004] The purpose of the present invention is to provide a dishwasher water level detection mechanism and detection method which are simple in structure, can prevent water overflow, can also prevent dry burning caused by water shortage, and are highly practical, so as to overcome the shortcomings of the prior art.

[0005] A dishwasher water level detection mechanism designed for this purpose includes a washing pump, a water tank and a drainage pump. The water outlet of the washing pump is connected to the water tank through a water channel, and the water inlet of the drainage pump is connected to the water tank. The invention is characterized in that it also includes a water level detection device, which is fixedly installed on the water channel. The water level detection device is closed under the action of the water pressure of the washing pump to generate and output a detection signal, thereby feeding back the current water level status of the water tank.

[0006] The water level detection device includes a water level switch and a trigger spring. The trigger spring is installed on the water channel. The trigger spring is deformed under the water pressure of the washing pump to squeeze the water level switch, thereby triggering the water level switch to close. The water level switch generates a detection signal and outputs it.

[0007] The water level detection device also includes a mounting support, the mounting support is mounted on the trigger spring piece, and the water level switch is fixed on the mounting support.

[0008] A deformation action part is arranged on the trigger spring piece, and a trigger part is arranged on the water level switch. The deformation action part is deformed under the action of the water pressure of the washing pump and acts on the trigger part, thereby triggering the water level switch to close.

[0009] The water channel is provided with an installation opening, the trigger spring is clamped on the installation opening, the trigger spring is provided with a plug-in groove, the installation support is provided with a plug-in rib, the plug-in rib and the plug-in groove are plugged into each other to fix the installation support on the trigger spring.

[0010] The water channel is a washing pump water outlet connecting pipe, and the water outlet of the washing pump is connected to the water tank through the washing pump water outlet connecting pipe.

[0011] The trigger spring is made of rubber material.

[0012] A detection method for a dishwasher water level detection mechanism designed for this purpose is characterized by comprising the following steps: 1) The dishwasher starts running. Before the dishwasher is filled with water, the washing pump starts running; 2) Perform water level detection through the water level detection device. If the water level detection device is closed, the output signal indicates that there is water in the water tank. The washing pump stops working and the drainage pump starts working to discharge the residual water in the water tank. After the drainage pump finishes working, the washing pump starts running again and the water level detection device is used to detect the water level again. 3) In step 2), if the water level detection device is not closed, the feedback signal indicates that there is no water in the sink, and then the dishwasher is filled with water normally; 4) After the dishwasher is filled with water, the washing pump starts running and the water level is detected by the water level detection device. If the water level detection device is not closed, it means that the water inflow is abnormal, and then the dishwasher is filled with water normally again. After the dishwasher is filled with water, the washing pump starts running again and the water level is detected by the water level detection device again; 5) In step 4), if the water level detection device is closed, it means that the water inflow is normal and there is water in the sink, and then the dishwasher operates normally.

[0013] In step 2), the washing pump is started again and the water level is detected by the water level detection device again. If the water level detection device is closed, the drainage alarm is triggered.

[0014] In step 4), the washing pump is started again and the water level is detected by the water level detection device again. If the water level detection device is not closed, the water inlet alarm is triggered.

[0015] The present invention adds a water level detection device in the water outlet connection pipeline of the dishwasher washing pump. The water level detection device detects the water volume by water pressure, that is, the water pressure generated by the operation of the washing pump triggers the feedback signal of the water level detection device, so as to more accurately understand the water usage status inside the dishwasher, strengthen the protection of the water usage status of the dishwasher, prevent water overflow, and prevent dry burning caused by lack of water, thereby realizing the enhanced protection effect of the dishwasher water, and further improving the practical reliability of the dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of a water level detection mechanism in one embodiment of the present invention.

[0017] Figure 2Schematic diagram of a partial structure of a water level detection mechanism in one embodiment of the present invention.

[0018] Figure 3 It is a partial structural cross-sectional view of a water level detection mechanism in one embodiment of the present invention.

[0019] Figure 4 The figure is a detection flow chart of a water level detection mechanism in one embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] See also Figure 1-Figure 4 The water level detection mechanism of the dishwasher includes a washing pump 1, a water tank 2 and a drainage pump 13. The water outlet of the washing pump 1 is connected to the water tank 2 through a water channel, and the water inlet of the drainage pump 13 is connected to the water tank 2. It also includes a water level detection device 3, which is fixedly installed on the water channel. The water level detection device 3 is closed under the water pressure of the washing pump 1 to generate and output a detection signal, thereby feeding back the current water level state of the water tank 2, that is, detecting the current water level of the water tank 2.

[0022] The water level detection device 3 includes a water level switch 4 and a trigger spring 5. The trigger spring 5 is installed on the water channel. The trigger spring 5 is deformed under the water pressure of the washing pump 1 to squeeze the water level switch 4, thereby triggering the water level switch 4 to close. The water level switch 4 generates a detection signal and outputs it, thereby feeding back the current water level status of the water tank 2.

[0023] The water level detection device 3 further comprises a mounting support 6 , which is mounted on the trigger spring 5 , and the water level switch 4 is fixed on the mounting support 6 . A buckle 14 for fixing the water level switch 4 is provided on the mounting support 6 .

[0024] A deformation action part 7 is provided on the trigger spring piece 5, and a trigger part 8 is provided on the water level switch 4. The deformation action part 7 is deformed under the water pressure of the washing pump 1 and acts on the trigger part 8, thereby triggering the water level switch 4 to close. The trigger part 8 is a contact on the water level switch 4.

[0025] An installation opening 9 is provided on the water channel, and the trigger spring piece 5 is clamped on the installation opening 9. An insertion groove 10 is provided on the trigger spring piece 5, and an insertion rib 11 is provided on the mounting support 6. The insertion rib 11 and the insertion groove 10 are plugged into each other to fix the mounting support 6 on the trigger spring piece 5.

[0026] The water channel is the washing pump outlet connecting pipe 12, and the water outlet of the washing pump 1 is connected to the water tank 2 through the washing pump outlet connecting pipe 12. The water channel is not limited to the washing pump outlet connecting pipe 12, and only needs to be in the water channel with negative pressure of the washing pump outlet.

[0027] The trigger spring piece 5 is made of rubber material.

[0028] The detection method of the dishwasher water level detection mechanism comprises the following steps: 1) The dishwasher starts running. Before water enters the dishwasher, the washing pump 1 starts running; 2) Perform water level detection through the water level detection device 3 (water level switch 4). If the water level detection device 3 (water level switch 4) is closed, the output signal indicates that there is water in the water tank 2, the washing pump 1 stops working, and the drainage pump 13 starts working to discharge the original residual water in the water tank 2. After the drainage pump 13 finishes working, the washing pump 1 starts running again, and the water level detection device 3 is used again to detect the water level; 3) In step 2), if the water level detection device 3 is not closed, the feedback signal indicates that there is no water in the water tank 2, and then the dishwasher is filled with water normally; 4) After the dishwasher is filled with water, the washing pump 1 starts to run, and the water level detection device 3 is used to detect the water level. If the water level detection device 3 is not closed, it means that the water inflow is abnormal, and then the dishwasher is filled with water normally again. After the dishwasher is filled with water, the washing pump 1 starts to run again, and the water level detection device 3 is used to detect the water level again; 5) In step 4), if the water level detection device 3 is closed, it means that the water inflow is normal and there is water in the water tank 2, and then the dishwasher operates normally.

[0029] In step 2), the washing pump 1 is started again and the water level detection device 3 is used to detect the water level again. If the water level detection device 3 is closed, the drainage alarm is triggered; that is, the drainage alarm is triggered when the above cycle steps occur again.

[0030] In step 4), the washing pump 1 is started again and the water level detection device 3 is used to detect the water level again. If the water level detection device 3 is not closed, the water inlet alarm is triggered; that is, the water inlet alarm is triggered when the above cycle steps occur again.

[0031] The detection method of the dishwasher water level detection mechanism is different from the traditional single control method, and adds double protection, thereby realizing the enhanced protection effect of the dishwasher water and further improving the reliability of the dishwasher.

[0032] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for illustrating the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dishwasher water level detection mechanism, comprising a washing pump (1), a water tank (2) and a drainage pump (13), wherein the water outlet of the washing pump (1) is connected to the water tank (2) through a water channel, and the water inlet of the drainage pump (13) is connected to the water tank (2), characterized in that: It also includes a water level detection device (3), which is fixedly mounted on the water channel. The water level detection device (3) is closed under the action of the water pressure of the washing pump (1) to generate and output a detection signal, thereby feeding back the current water level state of the water tank (2).

2. The dishwasher water level detection mechanism according to claim 1, characterized in that: The water level detection device (3) comprises a water level switch (4) and a trigger spring (5). The trigger spring (5) is mounted on the water channel. The trigger spring (5) is deformed under the action of the water pressure discharged from the washing pump (1) to press the water level switch (4), thereby triggering the water level switch (4) to close. The water level switch (4) generates and outputs a detection signal.

3. The dishwasher water level detection mechanism according to claim 2, characterized in that: The water level detection device (3) further comprises a mounting support (6), wherein the mounting support (6) is mounted on the trigger spring (5), and the water level switch (4) is fixed on the mounting support (6).

4. The dishwasher water level detection mechanism according to claim 2, characterized in that: The trigger spring piece (5) is provided with a deformation action portion (7), and the water level switch (4) is provided with a trigger portion (8). The deformation action portion (7) is deformed under the action of the water pressure of the washing pump (1) and acts on the trigger portion (8), thereby triggering the water level switch (4) to close.

5. The dishwasher water level detection mechanism according to claim 3, characterized in that: The water channel is provided with a mounting opening (9), the trigger spring piece (5) is clamped on the mounting opening (9), the trigger spring piece (5) is provided with a plug-in groove (10), the mounting support (6) is provided with a plug-in rib (11), and the plug-in rib (11) and the plug-in groove (10) are plugged into each other, so that the mounting support (6) is fixed on the trigger spring piece (5).

6. The dishwasher water level detection mechanism according to claim 5, characterized in that: The water channel is a washing pump water outlet connecting pipe (12), and the water outlet of the washing pump (1) is connected to the water tank (2) via the washing pump water outlet connecting pipe (12).

7. The dishwasher water level detection mechanism according to claim 5, characterized in that: The trigger spring (5) is made of rubber material.

8. The detection method of the dishwasher water level detection mechanism according to any one of claims 1 to 7, characterized in that: The following steps are involved: 1) The dishwasher is started and operated. Before water is introduced into the dishwasher, the washing pump (1) is started and operated; 2) The water level is detected by the water level detection device (3). If the water level detection device (3) is closed, the output signal indicates that there is water in the water tank (2). The washing pump (1) stops working and the drainage pump (13) starts working to discharge the residual water in the water tank (2). After the drainage pump (13) finishes working, the washing pump (1) starts running again and the water level is detected again by the water level detection device (3); 3) In step 2), if the water level detection device (3) is not closed, the feedback signal indicates that there is no water in the sink (2), and then the dishwasher is filled with water normally; 4) After the dishwasher is completely filled with water, the washing pump (1) is started and the water level is detected by the water level detection device (3). If the water level detection device (3) is not closed, it indicates that the water inflow is abnormal. Then the dishwasher is filled with water normally again. After the dishwasher is completely filled with water, the washing pump (1) is started and the water level is detected again by the water level detection device (3); 5) In step 4), if the water level detection device (3) is closed, it means that the water inflow is normal and there is water in the water tank (2), and then the dishwasher operates normally.

9. The detection method of the dishwasher water level detection mechanism according to claim 8, characterized in that: In step 2), the washing pump (1) is started again and the water level is detected again by the water level detection device (3). If the water level detection device (3) is closed, a drainage alarm is triggered.

10. The detection method of the dishwasher water level detection mechanism according to claim 8, characterized in that: In step 4), the washing pump (1) is started again and the water level detection device (3) is used to detect the water level again. If the water level detection device (3) is not closed, a water inflow alarm is triggered.

Images