Defoaming cleaning method for washing and drying machines and washing and drying machines

Abstract

The present invention provides a defoaming and cleaning method for a washing machine and a washing machine. In the defoaming and cleaning method for a washing machine, the present invention generates an airflow through the fan of the washing machine to blow the water flow in the drying duct to the door seal of the washing machine to perform water flow compensation for cleaning the door seal and defoaming. The washing machine includes a drying duct, a fan and a door seal. A first water nozzle is provided on the drying duct, and a second water nozzle is provided on the door seal. The present invention is provided with multi-point spray cleaning, which can achieve an all-round flushing effect on multiple parts inside the washing machine, especially the key cleaning parts; while achieving the cleaning of the drying duct, it is used in conjunction with the fan to achieve compensation for the water used for door seal cleaning, thereby improving the defoaming efficiency and enhancing the lint flushing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of washing and drying equipment, and in particular to a defoaming cleaning method for a washing and drying machine and a washing and drying machine. Background Art

[0002] Currently, washing machines and dryers all use a hot air drying mode, directing a stream of hot air into the inner drum to dry the clothes. During the drying or conditioning cycle, lint inevitably sheds from the clothes in the inner drum. This lint circulates with the dry air and adheres to the inner surfaces of the drying duct, filter, and door seal. If this lint accumulates over time and is not promptly flushed out, it can lead to a decline in the drying performance of the device and secondary contamination of the drying load (primarily clothing).

[0003] Furthermore, during the washing process, residual foam will remain on the door seal and observation window (also known as the glass bowl) of a washing machine. If the residual foam is not cleaned promptly, white precipitate and black mold will appear, seriously affecting the user experience. To address the residual foam problem, newly released washing machines and dryers on the market will have separate spray water circuits for flushing foam from the door seal and observation window. As a more optimized technology, some products will also have spray water circuits for the drying air duct to achieve spray flushing of the drying air duct.

[0004] To ensure high-speed flushing at individual locations, the two spray water paths are independently connected to the water inlet valves to form branches, preventing them from interfering with each other. However, this design not only complicates the piping system structure but also increases the cost of the water inlet valves and piping, leading to increased overall water intake, water consumption, and power consumption. Furthermore, when spraying at multiple locations, insufficient water pressure can lead to poor cleaning results. Summary of the Invention

[0005] In summary, how to solve the problem of complex piping system and poor cleaning effect caused by setting multiple independent spray water channels in the prior art has become an urgent problem to be solved by those skilled in the art.

[0006] In order to solve the above problems, the present invention provides a defoaming and cleaning method for a washing and drying machine. In the defoaming and cleaning method for a washing and drying machine provided by the present invention, water used to flush the drying duct, filter and condenser is sprayed into the drying duct of the washing and drying machine; the fan of the washing and drying machine generates an airflow to guide the water flow in the drying duct to the door seal of the washing and drying machine to perform water flow compensation for cleaning and defoaming the door seal.

[0007] Preferably, the defoaming cleaning method for a washing machine and dryer provided by the present invention includes: step 1, obtaining the operating mode of the washing machine and dryer; step 2, performing a dander flushing operation or a defoaming operation according to the operating mode of the washing machine and dryer; when performing the dander flushing operation, water for flushing the drying duct, the filter and the condenser is sprayed into the drying duct of the washing machine and dryer, and the fan of the washing machine and dryer generates an airflow to guide the water in the drying duct to the door seal of the washing machine and dryer to perform water flow compensation for the cleaning of the door seal; when performing the defoaming operation, water for flushing the drying duct, the filter and the condenser is sprayed into the drying duct of the washing machine and dryer, and the fan of the washing machine and dryer generates an airflow to guide the water in the drying duct to the door seal of the washing machine and dryer to perform water flow compensation for the defoaming of the door seal; the operating modes include a normal mode and a drum self-cleaning mode.

[0008] Preferably, in the defoaming and cleaning method for a washing and drying machine provided by the present invention, in the normal mode, the step 2 includes: step 2a, obtaining the pressure value P1 in the drying duct in the operating state, and comparing the pressure value P1 with the benchmark pressure value P0; step 2b, when P1>0.9P0, ending this operation, and when P1≤0.9P0, determining whether an instruction to perform a dander flushing operation is received, if so, executing step 2c, and if not, ending this operation; step 2c, performing a dander flushing operation, and obtaining the pressure value P3 in the drying duct in real time, comparing the pressure value P3 with the benchmark pressure value P0, until P3≥P0 ending this operation; the operation is a washing or drying operation performed by the washing and drying machine.

[0009] Preferably, in the defoaming and cleaning method for a washing machine and dryer provided by the present invention, step two c includes: spraying and flushing the drying duct and the door seal separately, and obtaining the pressure value P2 in the drying duct in real time, comparing the pressure value P2 with the benchmark pressure value P0, and when 0.9P0<P2<0.95P0, continuing the separate spraying and flushing; when 0.95P0≤P2<P0, turning on the fan to compensate for the water flow of the door seal flushing; obtaining the pressure value P3 in the drying duct in real time, comparing the pressure value P3 with the benchmark pressure value P0, and ending the operation until P3≥P0.

[0010] Preferably, in the defoaming cleaning method for a washing machine and dryer provided by the present invention, in the drum self-cleaning mode, the step two includes: step two a1, obtaining the pressure value P1 in the drying duct, and comparing the pressure value P1 with the benchmark pressure value P0; step two b1, when P1>0.9P0, performing the drum self-cleaning operation, and when P1≤0.9P0, performing separate spraying and flushing on the drying duct and the door seal; step two c1, when performing separate spraying and flushing on the drying duct and the door seal, obtaining the pressure value P2 in the drying duct, and comparing the pressure value P2 with the benchmark pressure value P0; step two d, when 0.9P0<P2<0.95P0, continuing to spray and flush separately, and when 0.95P0≤P2<P0, turning on the fan to perform water flow compensation for flushing the door seal until the drum self-cleaning mode ends.

[0011] Preferably, in the defoaming cleaning method for a washing machine and dryer provided by the present invention, the step two also includes: step two e, obtaining the pressure value P3 in the drying air duct, and comparing the pressure value P3 with the benchmark pressure value P0; step two f, when P3 < P0, continuing the current cleaning state; when P3 ≥ P0, continuing the drum self-cleaning mode until the end.

[0012] Preferably, the defoaming and cleaning method for a washing machine and a clothes dryer provided by the present invention further includes: step three, turning on the drying mode to dry the drying duct, the inner drum and the outer drum.

[0013] Preferably, in the defoaming and cleaning method for a washing and drying machine provided by the present invention, the fan operates intermittently during the process in which the fan generates airflow to blow the water in the drying duct to the door seal of the washing and drying machine to clean the door seal and perform water flow compensation for defoaming.

[0014] The present invention also provides a washing and drying machine, comprising a drying duct, a fan and a door seal, wherein the fan is arranged on the drying duct, a first water nozzle is provided on the drying duct, and a second water nozzle is provided on the door seal; the first water nozzle sprays water into the drying duct for flushing the drying duct, and the fan generates an airflow to blow the water in the drying duct to the door seal to cooperate with the second water nozzle to perform water flow compensation for cleaning and defoaming the door seal.

[0015] Preferably, in the washing and drying machine provided by the present invention, a drying duct spray pipe is connected to the first water nozzle, and a door seal pleated spray pipe is connected to the second water nozzle, and the drying duct spray pipe and the door seal pleated spray pipe are connected in parallel through a tee.

[0016] The present invention provides a first water nozzle on the drying duct and a second water nozzle on the door seal. Water is sprayed into the drying duct through the first water nozzle to flush the drying duct, filter, and condenser. The present invention also uses the fan of the washing and drying machine to generate airflow to guide the water flow in the drying duct to the door seal of the washing and drying machine to compensate for the water flow of the door seal and defoaming. The present invention provides multi-point spray cleaning, which can achieve a full-scale flushing effect on multiple parts inside the washing and drying machine, especially the key cleaning parts. In addition, the creative spray cleaning of the drying duct, used in conjunction with the fan, can also achieve compensation for the water used for door seal cleaning. Under low water pressure and low flow conditions, it can also improve the defoaming efficiency and enhance the lint flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0018] Figure 1 Schematic diagram of the cross-sectional structure of a washing and drying machine according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the cross-sectional structure of a washing and drying machine in an embodiment of the present invention from a top view;

[0020] Figure 3 Schematic diagram of the layout of the spray pipes in the washing and drying machine according to an embodiment of the present invention;

[0021] Figure 4 for Figure 3 The diagram after changing the perspective;

[0022] Figure 5 for Figure 3 The diagram after changing the perspective again;

[0023] Figure 6 for Figure 3 Diagram from a bird's-eye view;

[0024] Figure 7 1 is a flowchart of an implementation of a defoaming cleaning method for a washing machine and a clothes dryer in a normal mode according to an embodiment of the present invention;

[0025] Figure 8 1 is a flowchart of an implementation of a defoaming cleaning method for a washing and drying machine in a drum self-cleaning mode according to an embodiment of the present invention.

[0026] exist Figures 1 to 6 , the corresponding relationship between component names and reference numerals is as follows:

[0027] 1. Outer cylinder; 2. Condenser; 3. Drying air duct; 4. Fan; 5. Flow channel plate; 6. Door seal; 7. Pressure sensor;

[0028] A, spray main water inlet pipe; A0, main spray pipe; A1, drying duct spray pipe; A2, glass bowl spray pipe; A3, door seal pleated spray pipe;

[0029] B. Condensation water inlet pipe;

[0030] C. Wash the water inlet pipe. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Please refer to Figures 1 to 8 .

[0033] The present invention provides a defoaming and cleaning method for a washing machine and a dryer. The difference between the defoaming and cleaning method for a washing machine and a dryer and a traditional washing machine and a dryer is that, through the structural improvement of the hardware equipment, on the premise of achieving the cleaning of the drying duct 3 (including other cleanable components arranged on the drying duct 3), the water flow used for cleaning the drying duct 3 can also be compensated to the door seal to clean the door seal 6. Specifically, the core concept of the defoaming and cleaning method for a washing machine and a dryer provided by the present invention is: spraying water flow for flushing the drying duct 3, the filter and / or the condenser 2 into the drying duct 3 of the washing machine and the dryer, and generating an airflow through the fan 4 of the washing machine and blowing the water flow in the drying duct 3 to the door seal of the washing machine and the dryer to perform water flow compensation for cleaning the door seal 6 and defoaming.

[0034] The hardware structure for implementing the above-mentioned defoaming and cleaning method for a washing machine and a dryer is as follows: the washing machine and the dryer include a drying air duct 3, a fan 4 is provided on the drying air duct 3, a condenser 2 is provided in the drying air duct 3 (of course, it can also be a heating tube), and the washing machine and the dryer are also provided with a door seal 6 (the door seal 6 is a sealing ring with a pleated structure, which is used to seal after the washing machine door is closed). An air outlet is provided on the door seal 6, and the air outlet end of the drying air duct 3 is connected to the air outlet. The airflow (which can be the hot airflow heated by the condenser 2) can enter the inner drum of the washing machine and the dryer through the air outlet to dry the clothes. A reflux port is provided on the outer drum 1 of the washing machine and the airflow in the drum will be discharged from the outer drum 1. The reflux port returns to the drying air duct 3 to realize circulation, a first water nozzle is provided on the drying air duct 3, and a second water nozzle is provided on the door seal 6, and the first water nozzle and the second water nozzle are connected to pipelines for conveying water flow, specifically, the drying air duct spray pipe A1 is connected to the first water nozzle, and the door seal pleated spray pipe A3 is connected to the second water nozzle, the drying air duct spray pipe A1 and the door seal pleated spray pipe A3 are connected in parallel through a tee, and the first water nozzle sprays water into the drying air duct 3 for flushing the drying air duct 3, and the fan 4 can generate airflow to blow the water flow in the drying air duct 3 to the door seal 6 to cooperate with the second water nozzle to clean and defoam the door seal 6 for water flow compensation.

[0035] Based on the above structural design, the present invention can spray water into the drying duct 3 through the first water nozzle to achieve flushing in the drying duct 3, and can spray water into the door seal 6 through the second water nozzle to achieve flushing of the door seal 6. When water flow compensation is required for flushing the door seal 6 (for example, when the water flow for flushing the door seal 6 is small), the fan 4 can be turned on (only the fan 4 is turned on without heating), and the airflow generated by the fan 4 drives a part of the water flow in the drying duct 3 to be sprayed out from the air outlet, thereby achieving compensation for the water flow for flushing the door seal 6, so as to ensure the flushing effect of the door seal 6.

[0036] Specifically, for a washing and drying machine product, the implementation of the above defoaming cleaning method includes the following two steps:

[0037] Step 1: Get the operating mode of the washing machine and dryer.

[0038] Generally speaking, a washing and drying machine has two modes, one is the normal mode, which completes the washing and drying operations, and the other is the drum self-cleaning mode, which is the automatic cleaning mode of the washing and drying machine (without washing and drying clothes).

[0039] Step 2: Perform dander flushing or defoaming operation according to the operating mode of the washing and drying machine (the operation of the washing and drying machine is different in different modes). During the dander flushing and defoaming operation, the water flow in the drying duct 3 compensates for the dander flushing or defoaming at the door seal 6.

[0040] For the normal mode, in the normal mode, step 2 includes:

[0041] Step 2a: Obtain the pressure value P1 within the drying duct 3 in the operating state and compare it with the reference pressure value P0 (the pressure value within the drying duct 3 when the drying duct 3 is in a clean state and drying is proceeding normally). First, the washer-dryer has begun executing the washing (washing includes a drying step at the end) or single-drying (single-drying means drying only without washing) program. During the washing or drying program, drying air will circulate in the drying duct 3. If the drying duct 3 is not blocked, the flow of the drying air will not be affected, and there will be no pressure drop. If the drying duct 3 is blocked, the flow of the drying air will be affected, resulting in a pressure drop. The present invention determines whether lint flushing is required in the drying duct 3 based on whether the drying airflow generates a pressure drop and the value of the pressure drop.

[0042] Step 2b: When P1>0.9P0, end this operation; when P1≤0.9P0, obtain an instruction on whether to perform the dander flushing operation; if yes, proceed to step 2c; if not, end this operation.

[0043] In step 2b, when P1>0.9P0, it is determined that the drying duct 3 does not need to be cleaned, so the washing or drying operation is directly ended after the washing or drying is completed; when P1≤0.9P0, it is determined that the drying duct 3 needs to be cleaned. At this time, the washing and drying machine prompts the user and the user makes an instruction on whether to clean. If yes, that is, the user chooses to clean, then enter step 2c; if no, that is, the user does not choose to clean, then end this operation.

[0044] Step 2 c: perform the lint flushing operation, and obtain the pressure value P3 in the drying air duct 3 in real time, and compare it with the reference pressure value P0, until P3 ≥ P0, and end this operation.

[0045] Specifically, in step 2c, when performing the dander flushing operation, the drying duct 3 and the door seal 6 are first sprayed and flushed separately, and the pressure value P2 in the drying duct 3 is obtained in real time, and compared with the benchmark pressure value P0. When 0.9P0<P2<0.95P0, continue to spray and flush separately. When 0.95P0≤P2<P0, turn on the fan 4 to compensate for the water flow of the flushing of the door seal 6. Finally, the pressure value P3 in the drying duct 3 is obtained in real time, and compared with the benchmark pressure value P0, until P3≥P0 to end this operation.

[0046] For the drum self-cleaning mode, in the drum self-cleaning mode, step 2 includes:

[0047] Step 2 a. Drum self-cleaning mode is started. The normal drum self-cleaning operation begins. At this time, the pressure value P1 in the drying air duct 3 is obtained and compared with the reference pressure value P0.

[0048] Step 2b: When P1>0.9P0, it is determined that the drying duct 3 does not need to be cleaned, and the normal drum self-cleaning operation is performed. When P1≤0.9P0, it is determined that the drying duct 3 needs to be cleaned, and the drying duct 3 and the door seal 6 are first sprayed and flushed separately.

[0049] Step 2 c: When the drying duct 3 and the door seal 6 are sprayed and flushed separately, the blockage inside the drying duct 3 will be improved. During this period, the pressure value P2 in the drying duct 3 is obtained in real time and compared with the benchmark pressure value P0.

[0050] Step 2d. When 0.9P0<P2<0.95P0, it means that the drying air duct 3 still needs to be cleaned, so continue to spray and flush it separately. When 0.95P0≤P2<P0, it means that the drying air duct 3 does not need to be cleaned, so the water flow in the drying air duct 3 can be diverted and compensated to the door seal 6 for use. At this time, turn on the fan 4 to compensate for the water flow of the flushing of the door seal 6 until the drum self-cleaning mode ends.

[0051] In the drum self-cleaning mode, step 2 also includes: step 2e, obtaining the pressure value P3 in the drying air duct 3, and comparing it with the benchmark pressure value P0; step 2f, when P3<P0, continuing the current cleaning state, and when P3≥P0, continuing the drum self-cleaning mode until the end.

[0052] Step 3: Heat and dry the system to keep the inside of the washing and drying machine dry.

[0053] Furthermore, in the process where the fan 4 generates airflow to blow the water in the drying duct 3 to the door seal 6 of the washing and drying machine to clean and defoam the door seal 6 and perform water flow compensation, the fan 4 operates intermittently. This intermittent operation mode can form a regular "beating" effect to improve the cleaning effect.

[0054] From the above, it can be seen that the technical problems to be solved by the present invention include: 1. Spraying water from multiple locations with a single water source can easily cause low water pressure, and the door seal 6 and the glass bowl cannot be defoamed or rinsed of hair; 2. Traditional washing and drying machines do not have the function of cleaning the drying duct 3, and the condenser 2 and the drying duct 3 will have detergent and softener residues after overflowing.

[0055] In the face of the above problems, the solution of the present invention is: without increasing the number of existing water inlet valve branches (each branch can provide cleaning water to a certain place in the washing and drying machine, and the water inlet valve is a valve structure arranged on the branch), the drying duct 3 or the self-cleaning flushing water inlet pipe of the filter cylinder (specifically the drying duct spray pipe A1) and the door seal 6 for washing and defoaming and the observation window spraying water inlet pipe (specifically the door seal pleated spray pipe A3) share a water inlet waterway (specifically the main spraying water inlet pipe A), and a three-way structure is used for diversion to flush the air duct, filter, door seal 6 and observation window respectively. At the same time, by cooperating to open the fan 4 components in the drying duct 3, most of the water sprayed out of the duct is guided to the door seal 6 through the air outlet provided on the door seal 6, and the door seal 6 and the observation window are defoamed or cleaned of dander, thereby achieving the effect of thorough flushing of the drying flow duct, door seal 6 and observation window, fan 4 and other places. Direct spraying in the drying duct 3 can spray and clean the structural components provided in the drying duct 3, so that there is no need to add an additional flushing water channel in the fan 4 area, reducing the problem of reduced branch flow caused by re-diversion, and also reducing the risk of overload caused by foam accumulation and the risk of reduced drying efficiency caused by dander accumulation.

[0056] The present invention provides a defoaming and cleaning method for a washing machine and a dryer. In the defoaming and cleaning method for a washing machine and a dryer, the present invention sprays water into the drying duct 3 of the washing machine and a dryer for flushing the drying duct 3, the filter, and / or the condenser 2. The fan 4 of the washing machine and a dryer generates an airflow to blow the water in the drying duct 3 to the door seal 6 of the washing machine and a dryer for cleaning and defoaming the door seal 6 to compensate for the water flow. In addition, the present invention also provides a washing machine and a dryer, comprising a drying duct 3, a fan 4, and a door seal 6. The fan 4 is disposed on the drying duct 3. Specifically, a first water nozzle is disposed on the drying duct 3, and a second water nozzle is disposed on the door seal 6. The first water nozzle sprays water into the drying duct 3 for flushing the drying duct 3. The fan 4 generates an airflow to blow the water in the drying duct 3 to the door seal to cooperate with the second water nozzle to clean and defoam the door seal 6 to compensate for the water flow.

[0057] Through the above design, the advantages of the present invention include at least: 1. Multi-point spray cleaning is set up to achieve an all-round flushing effect on multiple parts inside the washing and drying machine, especially the key cleaning parts; 2. Creatively spray cleaning is performed on the drying duct 3 to achieve the effect of "one-point water outlet, multi-point cleaning". At the same time, when used in conjunction with the fan 4, it can also achieve compensation for the cleaning water of the door seal 6. Under low water pressure and low flow conditions, it can also improve the defoaming efficiency and the enhanced effect of dander flushing; 3. Optimized dander flushing operation or defoaming operation can reduce the risk of overload caused by foam accumulation and the risk of reduced drying efficiency caused by dander accumulation; 4. Cooperating with the drum self-cleaning mode, an all-round drum self-cleaning effect of the whole machine is achieved. In the above-mentioned "one-point water outlet, multi-point cleaning", one point refers to the water nozzle (first water nozzle) set on the drying duct 3, and multiple points refer to the fan 4, the filter and the condenser 2.

[0058] like Figure 1 and Figure 2 As shown, the washing and drying machine includes an outer drum 1, an inner drum, a drying air duct 3, a condenser 2, a water box and other components. Among them, the condenser 2 and the drying air duct 3 are key components for drying. As the drying cycle increases, they are also the components that are most seriously blocked by hair and dirt.

[0059] like Figures 3 to 5As shown, the water inlet valve of the washing and drying machine is connected to two or more branches, two of which are the washing water inlet pipe C and the condensing water inlet pipe B, and two or more branches are the spray main water inlet pipe A, the condensing water inlet pipe B, the washing water inlet pipe C, and the water inlets of other functions (such as the steam generator). The present invention is explained using three-branch water inlet pipes as an example, including the spray main water inlet pipe A, the condensing water inlet pipe B, and the washing water inlet pipe C. The water flow of the condensing water inlet pipe B is mainly used to cool the hot and humid air entering the condenser 2 to achieve the purpose of dehumidification. The washing water inlet pipe C is mainly used for the main wash, pre-wash, and rinse water to achieve the purpose of normal washing. The water flow of the spray main water inlet pipe A is mainly used to rinse parts such as the door seal 6 and the drying air duct 3 where foam and dander are easily accumulated. To flush as many dirty and clogged areas as possible, the main water inlet pipe A is split through a tee into a main spray pipe A0 and a drying duct spray pipe A1. Main spray pipe A0 passes through the bottom of the flow channel plate 5 and then connects to a tee to branch out into a glass bowl spray pipe A2 and a door seal pleated spray pipe A3. (In fact, the drying duct spray pipe A1 and the door seal pleated spray pipe A3 are connected by two tees.) Thus, the main water inlet pipe A ultimately branches into three spray pipes for flushing key areas such as the interior of the drying duct 3, the glass bowl, and the door seal 6.

[0060] like Figure 6 As shown, in order to make up for the defect that each part cannot be thoroughly rinsed due to the small flow rate allocated to each branch of the same water channel due to multiple diversions, the present invention turns on the drying fan 4 components while performing spray flushing, and guides most of the water flow sprayed out of the drying duct 3 to the door seal 6 and the glass bowl through the air outlet provided on the door seal 6, thereby increasing the defoaming and hair-dandruff flushing effect at these two places. When flushing key areas, the hair-dandruff on the fan 4 components and the heating structure in the drying duct 3 is also flushed, achieving the effect of multiple thorough flushing of all drying channels and key foam and hair-dandruff accumulation areas. The present invention increases the way to turn on the fan 4, and the spray water in the drying duct 3 is guided to the door seal 6 and the glass bowl along with the air flow, thereby enhancing the flushing effect of various parts. At the same time, it also solves the problem of detergent and softener residues after the condenser 2 and the drying duct 3 overflow.

[0061] In order to prevent dander from entering the drum and contaminating clothes due to spraying and flushing at the door seal 6 parts, drying duct 3, condenser 2 and other positions when defoaming in washing and rinsing modes, the dander flushing and defoaming functions need to be distinguished and not performed at the same time, and the dander flushing should be performed before the defoaming function.

[0062] In normal mode, in order to avoid unnecessary lint flushing and flushing to achieve efficient water saving, the present invention adds a pressure sensor 7 on the top of the condenser 2 to detect the pressure value at this position and compare it with the reference pressure value P0. Figure 7As shown, when a drying cycle is over, the washing and drying machine reminds the user to take out the clothes, and obtains the pressure value P1 at the pressure sensor 7. If P1>0.9P0, it means that there is less hair in the drying duct 3, and there is no need to flush this time, and the washing and drying machine is directly shut down. In the next washing stage, when the system detects that defoaming is needed, the fan 4 and the spray flushing valve are turned on to flush the drying duct 3 and the door seal 6 components, especially the door seal 6 fold position and the glass bowl part of the door seal 6 components, and the defoaming will be focused. This defoaming method not only prevents the hair in the drying duct 3 from entering the washing stage and contaminating the clothes, but also can completely defoam. Due to the addition of pressure detection, excessive flushing can be prevented, saving water and electricity. When P1≤0.9P0 is detected at the end of the drying cycle, it means that the drying duct 3 is clogged with lint. The washing and drying machine reminds the user to flush the lint. If the user does not want to flush the lint, it will shut down directly. When the defoaming logic is executed next time, only the spray flushing valve will be opened to flush the condenser 2 and the door seal 6 components respectively, so that the lint in the duct will not be brought into the door seal 6 components to contaminate the clothes; if the user confirms that the lint needs to be flushed, only the spray flushing valve will be opened to flush the inside of the drying duct 3 and the door seal 6 components. When the system detects the pressure value P2≥0.95P0 of the pressure sensor 7, the fan 4 will be turned on synchronously to flush the entire air duct, and the door seal 6 components will be cleaned in particular. When the system detects the pressure value P3≥P0, the flushing ends, the electric heating and fan 4 are turned on, the water inlet of the flushing valve is closed, and the system is thoroughly dried to prevent moisture from breeding bacteria in the system.

[0063] In the drum self-cleaning mode, the spray flushing process is implemented as follows Figure 8 As shown. Pressure detection and judgment are performed at the early stage of water intake in the cylinder self-cleaning mode. The flushing process is the same as the conventional method. When the pressure value P3 ≥ P0 is detected, water intake begins in the conventional cylinder self-cleaning manner. After the cylinder self-cleaning is completed, the electric heating and fan 4 are turned on to thoroughly dry the system to prevent moisture from breeding bacteria in the system. During spray flushing, in order to ensure the flushing effect inside the drying duct 3 (mainly flushing the condenser 2), the present invention adopts the method of intermittently turning on the drying fan 4 to achieve the purpose of local key flushing of the condenser 2 and full flushing of the drying duct 3, door seal 6, and glass bowl, so as to truly flush all components without dead angles.

[0064] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, 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 limiting the present invention.

[0065] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. A defoaming cleaning method for a washing and drying machine, characterized in that: The water used to flush the drying duct, filter and condenser is sprayed into the drying duct of the washing and drying machine; The fan of the washing and drying machine generates airflow to guide the water flow in the drying air duct to the door seal of the washing and drying machine to perform water flow compensation for cleaning and defoaming the door seal; the steps include: Step 1: Obtain the operating mode of the washing and drying machine; the operating mode includes a normal mode and a drum self-cleaning mode; Step 2: Perform a dander flushing operation or a defoaming operation according to the operating mode of the washer-dryer. When performing the dander flushing operation, water for flushing the drying duct, the filter, and the condenser is sprayed into the drying duct of the washer-dryer. The fan of the washer-dryer generates an airflow to guide the water in the drying duct to the door seal of the washer-dryer to perform water flow compensation for cleaning the door seal. When performing the defoaming operation, water for flushing the drying duct, the filter, and the condenser is sprayed into the drying duct of the washer-dryer. The fan of the washer-dryer generates an airflow to guide the water in the drying duct to the door seal of the washer-dryer to perform water flow compensation for defoaming the door seal. In the normal mode, the second step includes: Step 2a: Obtain the pressure value P1 in the drying air duct in the operating state, and compare the pressure value P1 with the reference pressure value P0; Step 2b: When P1>0.9P0, end this operation; when P1≤0.9P0, determine whether an instruction to perform a lint flushing operation is received; if so, execute step 2c; if not, end this operation; Step 2c: perform the lint flushing operation and obtain the pressure value P3 in the drying duct in real time, compare the pressure value P3 with the reference pressure value P0, and terminate the operation until P3 ≥ P0; The current operation is a washing or drying operation performed by the washing and drying machine, and the benchmark pressure value P0 refers to the pressure value in the drying duct when the drying duct is in a clean state and drying is proceeding normally.

2. The defoaming cleaning method for a washing and drying machine according to claim 1, characterized in that: The step 2c includes: spraying and flushing the drying duct and the door seal separately, and obtaining a pressure value P2 in the drying duct in real time, comparing the pressure value P2 with a reference pressure value P0, and continuing the separate spraying and flushing when 0.9P0 < P2 < 0.95P0; and turning on the fan to compensate for the flushing of the door seal with water flow when 0.95P0 ≤ P2 < P0; The pressure value P3 in the drying air duct is obtained in real time, and the pressure value P3 is compared with the reference pressure value P0, and the operation is terminated until P3 ≥ P0.

3. The defoaming cleaning method for a washing and drying machine according to claim 1, characterized in that: In the drum self-cleaning mode, the second step includes: Step 2 a1: obtaining a pressure value P1 in the drying air duct, and comparing the pressure value P1 with a reference pressure value P0; Step 2 b1: When P1>0.9P0, perform the drum self-cleaning operation; when P1≤0.9P0, spray and flush the drying duct and door seal separately; Step 2 c1: When spraying and flushing the drying duct and the door seal separately, obtain a pressure value P2 in the drying duct, and compare the pressure value P2 with the reference pressure value P0; Step 2d: When 0.9P0<P2<0.95P0, continue to spray and flush separately. When 0.95P0≤P2<P0, turn on the fan to compensate for the water flow of the door seal until the drum self-cleaning mode ends.

4. The defoaming and cleaning method for a washing and drying machine according to claim 3, characterized in that: The second step also includes: Step 2e: Obtain the pressure value P3 in the drying air duct, and compare the pressure value P3 with the reference pressure value P0; Step 2f: When P3 < P0, continue the current cleaning state; when P3 ≥ P0, continue the drum self-cleaning mode until the end.

5. The defoaming and cleaning method for a washing and drying machine according to claim 1, characterized in that: Also includes: Step 3: Turn on the drying mode to dry the drying duct, inner drum and outer drum.

6. The defoaming and cleaning method for a washing and drying machine according to any one of claims 1 to 5, characterized in that: During the process in which the fan generates airflow to blow the water in the drying duct to the door seal of the washing and drying machine to clean the door seal and defoam and perform water flow compensation, the fan operates intermittently.

7. A washing and drying machine for defoaming and cleaning using the defoaming and cleaning method according to claim 1, comprising a drying duct, a fan, and a door seal, wherein the fan is arranged on the drying duct, and is characterized in that: The drying air duct is provided with a first water spray nozzle, and the door seal is provided with a second water spray nozzle; The first water nozzle sprays water into the drying duct to flush the drying duct, and the fan generates airflow to blow the water in the drying duct to the door seal to cooperate with the second water nozzle to clean and defoam the door seal for water flow compensation.

8. The washing and drying machine according to claim 7, characterized in that: A drying air duct spray pipe is connected to the first water nozzle, and a door seal pleated spray pipe is connected to the second water nozzle. The drying air duct spray pipe and the door seal pleated spray pipe are connected in parallel through a tee.

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