A sink dishwasher

Abstract

The present invention relates to a sink dishwasher, comprising a dishwasher body, a sink arranged beside the dishwasher body, a drain outlet arranged below the dishwasher body, a drain valve arranged below the drain outlet, a dishwasher drain pipe connected to the drain, a sink drain pipe arranged below the sink, the dishwasher drain pipe being connected to the sink drain pipe, characterized in that a backflow detection assembly is provided on a pipeline connecting the dishwasher drain pipe and the sink drain pipe, the backflow detection assembly comprising a detection chamber having an opening at one end and a closed end at the other end, a turbine assembly arranged in the detection chamber, and a Hall sensor capable of detecting whether the turbine assembly rotates, the open end of the detection chamber facing the sink drain pipe, and the closed end of the detection chamber facing the dishwasher body. Compared with the prior art, the backflow detection assembly provided by the present invention has a novel structure, which can ensure that water will not enter the turbine assembly during the drainage stage of the dishwasher body, and water will pass through the turbine assembly when backflow occurs.

Description

Technical Field

[0001] The invention relates to a dishwasher sink. Background Art

[0002] Dishwashers have become an essential part of daily household use. A typical dishwasher uses a circulation pump to send water to the sink during the wash cycle to wash dishes and tableware. The dishwasher may include a sink, a spray arm, a pump motor, an inlet valve, and a drain valve. The wash water is pumped into the spray arm by the pump motor and the impeller connected to the pump motor, and the spray arm sprays the wash water onto the dishes in the sink. After the wash water falls, it is again pumped into the spray arm by the pump motor and the impeller connected to the pump motor, so that the wash water circulates to clean the dishes in the sink. After the wash cycle is completed, the dirt leaves the sink through the filter, the drain valve, and the drain pipe.

[0003] The sink dishwashers on the market generally have two tanks, a household sink and a dishwasher, and the drain pipes of the two are connected. When the household sink is full of water, if the water is drained at once, the drain pipe at the bottom of the household sink will not be able to drain the water in time, and under the action of water pressure, some water will flow back into the dishwasher through the dishwasher drain pipe, resulting in backflow. The water that returns to the dishwasher will accumulate in the dishwasher. After a period of time without being discharged, it will have an odor, affecting user use. In order to solve the backflow problem, a baffle is generally set in the middle of the drain pipe connected to the dishwasher or the drain outlet of the dishwasher is raised. Since the dishwasher is used to wash dishes, if the dishes are washed with heavy oil, the baffle is at risk of being stuck to the oil and blocked; if the drain outlet of the dishwasher is raised, the volume of the dishwasher may be reduced due to limited space. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new sink dishwasher capable of detecting whether water backflow occurs in the dishwasher tank body in view of the above-mentioned prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a sink dishwasher, including a dishwasher body, a sink arranged next to the dishwasher body, a drain outlet arranged below the dishwasher body, a drain valve arranged below the drain outlet, a dishwasher drain pipe connected to the drain, a sink drain pipe arranged below the sink, and the dishwasher drain pipe is connected to the sink drain pipe, characterized in that: a backflow detection component is provided on the pipeline connecting the dishwasher drain pipe and the sink drain pipe, and the backflow detection component includes a detection cavity with an opening at one end and a closed end at the other end, a turbine assembly arranged in the detection cavity, and a Hall sensor capable of detecting whether the turbine assembly is rotating, wherein the open end of the detection cavity faces the sink drain pipe, and the closed end of the detection cavity faces the dishwasher body.

[0006] As an improvement, the backwater detection assembly includes a detection tube and an L-shaped water retaining plate arranged on the upper side of the detection tube, the detection cavity is formed between the L-shaped water retaining plate and the inner wall of the detection tube, and the turbine assembly is arranged in the detection cavity and located on the top side of the detection tube.

[0007] As a further improvement, the dishwasher drain pipe is connected to the sink drain pipe through a pipe joint, one end of the backwater detection component is connected to the pipe joint, and the other end is connected to the dishwasher drain pipe.

[0008] Preferably, the backflow detection assembly is detachably connected between the pipe joint and the dishwasher drain pipe.

[0009] As a further improvement, the drain valve is in an open state when the dishwasher is not in operation. When the water backflow detection component detects water backflow in the dishwasher tank, the drain valve is controlled to be closed.

[0010] Further improvement, the sink dishwasher has the following parameters pre-stored: Tmax, Cmax, T 关阀 , C 返 , and C 初始 , △T, △C, T 区间限值 , where Tmax is the time required for the water flowing through the sink drain pipe to contact the turbine assembly and then return to the dishwasher tank body, and Cmax is the value T detected by the Hall sensor when the water flowing through the sink drain pipe contacts the turbine assembly and then returns to the dishwasher tank body. 关阀 To control the time required for the drain valve to close, C 返 is the increase in the Hall sensor value within the valve closing time Tmax-T, △T is the preset time margin constant, △C is the preset Hall value margin constant, C 初始 To preset the initial Hall value when judging whether there is rebate, T 区间限值 The upper limit value of interval timing;

[0011] The sink dishwasher detects whether there is water backflow in the dishwasher tank in the following way: when the sink dishwasher is not in operation, open the drain valve, and then regularly start the following initial detection process:

[0012] Initial detection process: When the Hall sensor detects the value C 霍尔 Greater than C 初始 , it is considered that there is water causing the turbine assembly to rotate. At this time, the water return timing flag is set, and the water return timing T1 is started. The interval timing flag is set, and the interval timing T2 is started. The Hall sensor value at this time is assigned to C 区间初始， Then the valve closing detection process and the interval detection process are carried out simultaneously:

[0013] The valve closing detection process is as follows: when the return water valve closing flag is not set, when T1>(Tmax-T 关阀-△ T) if C 霍尔 >(C 返-△ C), then close the drain valve, set the return valve closing flag, and clear the interval timer T2. Since the return valve closing flag has been set, the valve closing detection process is no longer performed, and the interval detection process is still in progress;

[0014] The interval detection process is as follows: when the interval timing flag is in position, when the interval timing T2 is greater than T 区间限值 , judge the Hall sensor value C at this time 霍尔 Is it greater than C? 区间初始 +10, if it is, it is considered that there is still rebate, so the T2 timing is cleared and the Hall sensor value at this time is assigned to C 区间初始 If not, it is considered that there is no return water to cause the turbine to rotate. If it is considered that there is no return water for three consecutive times, it is considered that there is no return water. The return water timing flag is cleared, the interval timing flag is cleared, the return water valve closing flag is cleared, and the drain valve is opened.

[0015] Preferably, the time interval between periodically starting the initial inspection process of the under-sink dishwasher is 1 to 2 hours.

[0016] Compared with the prior art, the advantages of the present invention are: a backflow detection assembly is provided on the pipeline connecting the dishwasher drain pipe and the sink drain pipe, the backflow detection assembly is a detection chamber with an opening at one end and a closed end at the other end, a turbine assembly arranged in the detection chamber, and a Hall sensor capable of detecting whether the turbine assembly is rotating. The open end of the detection chamber is directed toward the sink drain pipe, and the closed end of the detection chamber is directed toward the dishwasher tank body, so that water will not enter the turbine assembly during the drainage stage of the dishwasher tank body, and when the household sink is drained, if the drainage pressure is too high to cause backflow, the water will pass through the turbine assembly, and the backflow situation is judged by the detection value of the Hall sensor. In the improved scheme, the drain valve is normally open in the non-working stage, and will only be closed when there is backflow to ensure that water will not return to the dishwasher tank, so that the ventilation inside the tank body is unobstructed and the odor will not always exist. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a sink dishwasher in an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the structure of the backflow detection component in an embodiment of the present invention.

[0019] Figure 3 This is a flow chart of valve closing detection in an embodiment of the present invention.

[0020] Figure 4 This is a flow chart of interval detection in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 The sink dishwasher shown includes a dishwasher body 1, a sink 2 arranged next to the dishwasher body, a drain outlet arranged below the dishwasher body, a drain valve 3 arranged below the drain outlet, a dishwasher drain pipe 4 connected to the drain, a sink drain pipe 5 arranged below the sink, the dishwasher drain pipe 4 is connected to the sink drain pipe 5, and a backflow detection component 6 is provided on the pipeline connecting the dishwasher drain pipe 4 and the sink drain pipe 5. The backflow detection component 6 includes a detection cavity 61 with an opening at one end and a closed end at the other end, a turbine component 62 arranged in the detection cavity, and a Hall sensor 63 capable of detecting whether the turbine component is rotating, wherein the open end of the detection cavity 61 faces the sink drain pipe 5, and the closed end of the detection cavity faces the dishwasher body 4.

[0023] In this embodiment, the backflow detection assembly 6 includes a detection tube 64 and an L-shaped water retaining sheet 65 arranged on the upper side of the inner part of the detection tube. Figure 2 As shown, the detection chamber 61 is formed between the L-shaped water retaining piece 65 and the inner wall of the detection tube 64, the turbine assembly 62 is arranged in the detection chamber 61 and located at the top side of the detection tube; the Hall sensor 63 is arranged at the top of the outside of the detection tube 64. The dishwasher drain pipe 4 is connected to the sink drain pipe 5 through the pipe joint 7, one end of the detection tube 64 is connected to the pipe joint, and the other end is connected to the dishwasher drain pipe. And the detection tube 64 is detachably connected between the pipe joint and the dishwasher drain pipe, so that the entire backwater detection assembly can be replaced.

[0024] The drain valve is in an open state when the dishwasher is not in operation. When the backflow detection component detects backflow in the dishwasher tank, the drain valve is controlled to close.

[0025] Specifically, the following parameters are pre-stored in the sink dishwasher: Tmax, Cmax, T 关阀 , C 返 , and C 初始 , △T, △C, T 区间限值 , where Tmax is the time required for the water flowing through the sink drain pipe to contact the turbine assembly and then return to the dishwasher tank body, and Cmax is the value T detected by the Hall sensor when the water flowing through the sink drain pipe contacts the turbine assembly and then returns to the dishwasher tank body. 关阀 To control the time required for the drain valve to close, C 返is the increase in the Hall sensor value within the valve closing time Tmax-T, △T is the preset time margin constant, △C is the preset Hall value margin constant, C 初始 To preset the initial Hall value when judging whether there is rebate, T 区间限值 The upper limit value of interval timing;

[0026] The sink dishwasher detects whether there is water backflow in the dishwasher tank in the following way: when the sink dishwasher is not in operation, open the drain valve, and then regularly start the following initial detection process. The time interval for regularly starting the initial detection process is 1 to 2 hours:

[0027] Initial detection process: When the Hall sensor detects the value C 霍尔 Greater than C 初始 , it is considered that there is water causing the turbine assembly to rotate. At this time, the water return timing flag is set, and the water return timing T1 is started. The interval timing flag is set, and the interval timing T2 is started. The Hall sensor value at this time is assigned to C 区间初始， Then the valve closing detection process and the interval detection process are carried out simultaneously:

[0028] The valve closing detection process is as follows: when the return water valve closing flag is not set, when T1>(Tmax-T 关阀 -△T), if C 霍尔 >(C 返 -△C), then close the drain valve, set the return valve closing flag, and clear the interval timer T2. Since the return valve closing flag has been set, the valve closing detection process will no longer be carried out. During this period, the interval detection process is still in progress. Figure 3 As shown;

[0029] The interval detection process is as follows: when the interval timing flag is set, when the interval timing T2 is greater than T 区间限值 , judge the Hall sensor value C at this time 霍尔 Is it greater than C? 区间初始 +10, if it is, it is considered that there is still rebate, so the T2 timing is cleared and the Hall sensor value at this time is assigned to C 区间初始 If not, it is considered that there is no return water to cause the turbine to rotate. If it is considered that there is no return water for three consecutive times, it is considered that there is no return water. Clear the return water timing flag, clear the interval timing flag, clear the return water valve closing flag, open the drain valve, and participate in Figure 4 shown.

Claims

1. A sink dishwasher, comprising a dishwasher body, a sink disposed next to the dishwasher body, a drain outlet disposed below the dishwasher body, a drain valve disposed below the drain outlet, a dishwasher drain pipe connected to the drain valve, a sink drain pipe disposed below the sink, the dishwasher drain pipe being connected to the sink drain pipe, characterized in that: A backflow detection assembly is provided on a pipeline connecting the dishwasher drain pipe and the sink drain pipe. The backflow detection assembly includes a detection cavity with an opening at one end and a closed end at the other end, a turbine assembly arranged in the detection cavity, and a Hall sensor capable of detecting whether the turbine assembly is rotating. The open end of the detection cavity faces the sink drain pipe, and the closed end of the detection cavity faces the dishwasher tank body. The backflow detection assembly includes a detection tube, and an L-shaped water retaining plate arranged on the upper side of the detection tube. The detection cavity is formed between the L-shaped water retaining plate and the inner wall of the detection tube. The turbine assembly is arranged in the detection cavity and is located on the top side of the detection tube.

2. The under-sink dishwasher according to claim 1, characterized in that: The dishwasher drain pipe is connected to the sink drain pipe through a pipe joint, one end of the backwater detection component is connected to the pipe joint, and the other end is connected to the dishwasher drain pipe.

3. The under-sink dishwasher according to claim 1, characterized in that: The backflow detection assembly is detachably connected between the pipe joint and the dishwasher drain pipe.

4. The under-sink dishwasher according to claim 1, characterized in that: The drain valve is in an open state when the dishwasher is not in operation. When the backflow detection component detects backflow in the dishwasher tank, the drain valve is controlled to close.

5. The under-sink dishwasher according to claim 1, characterized in that: The following parameters are pre-stored in the sink dishwasher: Tmax, Cmax, T 关阀 , C 返 , and C 初始 , △T, △C, T 区间限值 , where Tmax is the time required for the water flowing through the sink drain pipe to contact the turbine assembly and then return to the dishwasher tank body, and Cmax is the value T detected by the Hall sensor when the water flowing through the sink drain pipe contacts the turbine assembly and then returns to the dishwasher tank body. 关阀 To control the time required for the drain valve to close, C 返 is the increase in the Hall sensor value within the valve closing time Tmax-T, △T is the preset time margin constant, △C is the preset Hall value margin constant, C 初始 To preset the initial Hall value when judging whether there is rebate, T 区间限值 The upper limit value of interval timing; The sink dishwasher detects whether there is water backflow in the dishwasher tank in the following way: when the sink dishwasher is not in operation, open the drain valve, and then regularly start the following initial detection process: Initial detection process: When the Hall sensor detects the value C 霍尔 Greater than C 初始 , it is considered that there is water causing the turbine assembly to rotate. At this time, the water return timing flag is set, and the water return timing T1 is started. The interval timing flag is set, and the interval timing T2 is started. The Hall sensor value at this time is assigned to C 区间初始， Then the valve closing detection process and the interval detection process are carried out simultaneously: The valve closing detection process is as follows: when the return water valve closing flag is not set, when T1>(Tmax-T 关阀 -△T), if C 霍尔 >(C 返 -△C), the drain valve is closed, and the return water valve closing flag is set, and the interval timer T2 is cleared. Since the return water valve closing flag has been set, the valve closing detection process is no longer carried out, and the interval detection process is still in progress; The interval detection process is as follows: when the interval timing flag is set, when the interval timing T2 is greater than T 区间限值 , judge the Hall sensor value C at this time 霍尔 Is it greater than C? 区间初始 +10, if it is, it is considered that there is still rebate, so the T2 timing is cleared and the Hall sensor value at this time is assigned to C 区间初始 If not, it is considered that there is no return water to cause the turbine to rotate. If it is considered that there is no return water for three consecutive times, it is considered that there is no return water. The return water timing flag is cleared, the interval timing flag is cleared, the return water valve closing flag is cleared, and the drain valve is opened.

6. The under-sink dishwasher according to claim 5, characterized in that: The time interval for the initial inspection process of the sink dishwasher to be started regularly is 1 to 2 hours.

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