A residual water detection and drying control method for a cleaning machine

Abstract

A residual water detection and drying control method for a washing machine, wherein a hot air component is installed on the side wall of the cavity of the washing machine, an exhaust component is installed on the inner door body, and a humidity sensor detects the humidity inside the cavity. After the washing machine is dried, the residual water detection and drying control method detects the humidity inside the cavity twice by means of the humidity sensor, and judges whether the user has added a rinse agent and whether there is residual water inside the cavity according to the detected humidity change, and then turns on the drying mode or dehumidification mode accordingly. The residual water detection and drying control method for the washing machine can judge whether the user uses a rinse agent and the residual water inside the dishwasher according to the change in the moisture content of the cavity, and intelligently select different drying modes, which can ensure that after the drying is completed, the inside of the dishwasher is in a dry state without residual water, improve the user experience, and reduce energy consumption. In addition, the working interval time of the heating element can be intelligently adjusted according to the rate of change of the moisture content, thereby extending the service life of the heating element.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent control of cleaning equipment, and in particular to a residual water detection and drying control method of a cleaning machine. Background Art

[0002] A washing machine is a device that sprays cold or hot water onto dishes to remove dirt adhering to dishes or fruits and vegetables and wash the dishes or fruits and vegetables. Dishwashers are one of the common washing machines, and the popularity of dishwashers has greatly improved the convenience of washing dishes. In daily life, many users do not add rinse aid when using dishwashers, so that after the dishwasher is dried, there is a lot of residual water at the bottom of the inner tank, which is easy to breed bacteria and affect the user experience. In order to make the dishwasher reach a completely dry state without using rinse aid, many dishwashers use a long-term heating and drying method. Long-term heating and drying will increase energy consumption, and the continuous long-term operation of the heating PTC will shorten the service life. Moreover, it is impossible to intelligently adjust the drying mode according to the changes in the moisture content inside the dishwasher and the residual water situation inside, and the degree of intelligence is low. In summary, the existing drying control method of the dishwasher needs to be further improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a residual water detection and drying control method for a cleaning machine that can intelligently enter a drying mode according to the residual water situation in the cavity and the rate of change of moisture content in response to the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a residual water detection and drying control method of the washing machine, the washing machine includes a cavity and an inner door body arranged on the front of the cavity, a hot air component is installed on the side wall of the cavity, the hot air component includes an air inlet duct, a heating element and an air inlet fan are installed in the air inlet duct, an exhaust component is installed on the inner door body, the exhaust component includes an exhaust duct, an exhaust fan is installed in the exhaust duct, and also includes a humidity sensor that can detect the humidity inside the cavity, and is characterized in that: after the washing machine finishes drying, the residual water detection and drying control method detects the humidity inside the cavity twice by using the humidity sensor, and judges whether the user adds rinse agent and whether there is residual water in the cavity according to the detected humidity changes, and then turns on the drying mode or dehumidification mode accordingly.

[0005] Preferably, based on the change in humidity, when no rinse agent is added and there is residual water, the air intake fan and the heating element are turned on for heating and drying; when rinse agent is added and there is no residual water or a small amount of residual water, the exhaust fan is turned on for dehumidification.

[0006] Further preferably, the residual water detection and drying control method comprises the following steps:

[0007] Step 1: After the washing machine is finished drying, the humidity sensor detects the humidity in the exhaust duct and calculates the humidity content Q1 inside the cavity based on the humidity;

[0008] Step 2: After the standby time T1, the exhaust fan is turned on, and the humidity sensor calculates the humidity content Q2 inside the cavity based on the humidity in the exhaust duct;

[0009] Step 3: Determine whether Q1 is less than Q2. If so, go to step 4. If not, go to step 7.

[0010] Step 4: The user does not use rinse agent, and there is a lot of residual water in the cavity. The cleaning machine enters the heating and drying mode, turns on the air intake fan and the heating element, and lasts for T2;

[0011] Step 5: Detect whether the humidity change rate of the exhaust duct of the cleaning machine is 0, if so, execute step 6, if not, stop the heating element for T3 time, and then execute step 4;

[0012] Step 6: Turn off the intake fan, exhaust fan, and heating element;

[0013] Step 7: The user uses a rinse agent, and there is no or little residual water in the cavity, and the cleaning machine enters the dehumidification mode;

[0014] Step 8: The air intake fan and the exhaust fan are turned on for T4 time;

[0015] Step 9: Determine whether the moisture content inside the cavity is lower than the preset value Q3. If so, turn off the air inlet fan and the exhaust fan and the drying is finished. If not, execute step 8.

[0016] The humidity sensor may be located in a plurality of different positions. Preferably, the humidity sensor is installed in the exhaust duct.

[0017] In order to realize intelligent control, a controller is also included, which can receive the output signal of the humidity sensor and control the air inlet fan, exhaust fan and heating element accordingly according to the output signal.

[0018] In order to connect the air inlet duct with the inside of the cavity, the air inlet duct has an air inlet and an air outlet, and an air inlet hole connected to the air outlet is opened on the side wall of the cavity.

[0019] In order to connect the exhaust duct with the interior of the cavity, the exhaust duct has an exhaust inlet and an exhaust outlet, and an exhaust hole connected to the exhaust inlet is opened on the inner door body.

[0020] Compared with the prior art, the advantages of the present invention are that the residual water detection and drying control method of the washing machine can judge whether the user uses rinse agent and the residual water situation inside the dishwasher according to the change of the moisture content of the cavity, and then intelligently select different drying modes according to the residual water situation inside the dishwasher, which can ensure that the inside of the dishwasher is in a dry state without residual water after the drying is completed, thereby improving the user experience and reducing energy consumption. In addition, the working interval time of the heating element can be intelligently adjusted according to the rate of change of the moisture content, which is beneficial to extending the service life of the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a cleaning machine according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 The schematic diagram of the cleaning machine shown is exploded;

[0023] Figure 3 is a schematic structural diagram of the hot air assembly of this embodiment;

[0024] Figure 4 is a schematic structural diagram of the exhaust assembly of this embodiment;

[0025] Figure 5 is a flow chart of the control method of this embodiment. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 4 As shown, the washing machine of this embodiment is a dishwasher, which includes a cavity 1 and an inner door body 2 arranged on the front of the cavity. In this embodiment, a hot air component 3 is installed on the right side wall of the cavity 1, and the hot air component 3 includes an air inlet duct 31, and a heating element 32 and an air inlet fan 33 are installed in the air inlet duct 31. The air inlet duct 31 has an air inlet 311 and an air outlet 312, and an air inlet hole 11 connected to the air outlet 312 is opened on the side wall of the cavity 1. An exhaust component 4 is installed on the inner door body 2, and the exhaust component 4 includes an exhaust duct 41, and an exhaust fan 42 and a humidity sensor 43 are installed in the exhaust duct 41. The exhaust duct 41 has an exhaust inlet 411 and an exhaust outlet 412, and an air outlet 21 connected to the exhaust inlet 411 is opened on the inner door body 2. The air in the cavity enters the exhaust duct 41 and flows through the humidity sensor 43, and the humidity sensor 43 can detect the humidity inside the cavity 1. The specific working principles of the hot air component 3 and the exhaust component 4 are the same as those of the existing cleaning machine and will not be described in detail here.

[0028] The washing machine of this embodiment also includes a controller (not shown in the figure), which can receive the output signal of the humidity sensor 43 and can control the air intake fan 33, the exhaust fan 42 and the heating element 32 accordingly according to the output signal. The control principle is as follows: after the washing machine is dried, the humidity sensor 43 detects the humidity inside the cavity 1 twice before and after, and the controller calculates the moisture content inside the cavity 1. According to the change of moisture content, it is judged whether the user has used the rinse agent and the residual water situation inside the dishwasher, and different drying modes (heating and drying mode, dehumidification mode) are selected according to the residual water situation, and finally the dishwasher is dry and free of residual water, thereby improving the user experience. Specifically, according to the judgment of humidity change, when the rinse agent is not added and there is residual water, the air intake fan 33 and the heating element 32 are turned on for heating and drying, and when the rinse agent is added and there is no residual water or a small amount of residual water, the exhaust fan 42 is turned on for dehumidification.

[0029] like Figure 5 As shown, the residual water detection and drying control method of this embodiment specifically includes the following steps:

[0030] Step 1: After the washing machine is finished drying, the humidity sensor 43 detects the humidity in the exhaust duct 41 and calculates the moisture content Q1 inside the cavity 1 according to the humidity;

[0031] Step 2: After the standby time T1, the exhaust fan 42 is turned on, and the humidity sensor 43 calculates the humidity content Q2 inside the cavity 1 according to the humidity in the exhaust duct 41;

[0032] Step 3: Determine whether Q1 is less than Q2. If so, go to step 4. If not, go to step 7.

[0033] Step 4: The user does not use a rinse agent, and there is a lot of residual water in the cavity 1. The cleaning machine enters the heating and drying mode, and turns on the air inlet fan 33 and the heating element 32 for a duration of T2;

[0034] Step 5: Detect whether the humidity change rate of the exhaust duct 41 of the cleaning machine is 0, if so, execute step 6, if not, stop the heating element 32 for T3 time, and then execute step 4;

[0035] Step 6: Turn off the air inlet fan 33, the exhaust fan 42 and the heating element 32;

[0036] Step 7: The user uses a rinse agent, and there is no or little residual water in the cavity 1, and the cleaning machine enters a dehumidification mode;

[0037] Step 8: The air inlet fan 33 and the exhaust fan 42 are turned on for a time period of T4;

[0038] Step 9: Determine whether the humidity inside the cavity 1 is lower than the preset value Q3. If so, turn off the air inlet fan 33 and the exhaust fan 42 to end the drying. If not, execute step 8.

Claims

1. A method for detecting residual water and controlling drying of a cleaning machine, the cleaning machine comprising a cavity (1) and an inner door (2) arranged on the front of the cavity, a hot air component (3) is installed on the side wall of the cavity (1), the hot air component (3) comprises an air inlet duct (31), a heating element (32) and an air inlet fan (33) are installed in the air inlet duct (31), an exhaust component (4) is installed on the inner door (2), the exhaust component (4) comprises an exhaust duct (41), an exhaust fan (42) is installed in the exhaust duct (41), and also comprises a humidity sensor (43) capable of detecting the humidity inside the cavity (1), characterized in that: After the washing machine has finished drying, the residual water detection and drying control method detects the humidity inside the cavity (1) twice by means of the humidity sensor (43), and judges whether the user has added a rinse agent and whether there is residual water inside the cavity (1) according to the detected humidity change, and then turns on the drying mode or the dehumidification mode accordingly. According to the judgment of the humidity change, when the rinse agent is not added and there is residual water, the air inlet fan (33) and the heating element (32) are turned on for heating and drying, and when the rinse agent is added and there is no residual water or a small amount of residual water, the exhaust fan (42) is turned on for dehumidification. The residual water detection and drying control method comprises the following steps: Step 1: After the washing machine has finished drying, the humidity sensor (43) detects the humidity in the exhaust duct (41), and calculates the moisture content Q1 inside the cavity (1) based on the humidity; Step 2: After a standby time T1, the exhaust fan (42) is turned on, and the humidity sensor (43) calculates the humidity content Q2 inside the cavity (1) based on the humidity in the exhaust duct (41); Step 3: Determine whether Q1 is less than Q2. If so, go to step 4. If not, go to step 7. Step 4: The user does not use a rinse agent, and there is a lot of residual water inside the cavity (1). The cleaning machine enters a heating and drying mode, and turns on the air inlet fan (33) and the heating element (32) for a duration of T2; Step 5: Detect whether the humidity change rate of the exhaust duct (41) of the cleaning machine is 0, if so, execute step 6, if not, stop the heating element (32) for T3 time, and then execute step 4; Step 6: Turn off the air inlet fan (33), the exhaust fan (42) and the heating element (32); Step 7: The user uses a rinse agent, and there is no or little residual water in the cavity (1), and the cleaning machine enters a dehumidification mode; Step 8: The air inlet fan (33) and the exhaust fan (42) are turned on for a time period of T4; Step 9: Determine whether the humidity inside the cavity (1) is lower than a preset value Q3. If so, turn off the air inlet fan (33) and the exhaust fan (42) to end the drying process. If not, execute step 8.

2. The residual water detection and drying control method of a cleaning machine according to claim 1, characterized in that: The humidity sensor (43) is installed in the exhaust duct (41).

3. The residual water detection and drying control method of a cleaning machine according to claim 1, characterized in that: A controller is also included, which can receive the output signal of the humidity sensor (43) and can control the air intake fan (33), the exhaust fan (42) and the heating element (32) accordingly according to the output signal.

4. The residual water detection and drying control method of a cleaning machine according to any one of claims 1 to 3, characterized in that: The air inlet duct (31) has an air inlet (311) and an air outlet (312), and an air inlet hole (11) connected to the air outlet (312) is provided on the side wall of the cavity (1).

5. The residual water detection and drying control method of a cleaning machine according to any one of claims 1 to 3, characterized in that: The exhaust pipe (41) has an exhaust inlet (411) and an exhaust outlet (412), and an exhaust hole (21) communicating with the exhaust inlet (411) is formed on the inner door body (2).

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