Dishwasher and self-cleaning method therefor, and self-cleaning method for waste heat recovery system

Abstract

A self-cleaning method for a waste heat recovery system, a self-cleaning method for a dishwasher, a control apparatus for a dishwasher, a computer-readable storage medium, and a dishwasher. The dishwasher comprises a water intake unit, a water cup (10), a washing pump (41), and a heat exchange unit (22). The heat exchange unit (22) comprises a first flow channel. An inlet of the washing pump (41) is connected to the water cup (10), and an outlet of the washing pump (41) is connected to one end of the first flow channel. The other end of the first flow channel is connected to the water cup (10). The self-cleaning method for a waste heat recovery system comprises: controlling a water intake unit to feed water into a water cup (10); performing a first self-cleaning process, the first self-cleaning process comprising controlling a washing pump (41) to drive a fluid in the water cup (10) to flow to a first flow channel, and controlling the water cup (10) to drain when a first condition is satisfied.

Description

Dishwasher and self-cleaning method thereof, self-cleaning method of waste heat recovery system

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411340393.0, filed on September 24, 2024, and entitled "Dishwasher and self-cleaning method thereof, self-cleaning method of waste heat recovery system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of dishwashers, and in particular to a self-cleaning method of a waste heat recovery system, a self-cleaning method of a dishwasher, a control device of a dishwasher, a computer readable storage medium, and a dishwasher. BACKGROUND

[0004] In related technologies, dishwashers generally use electrically heated high-temperature hot water to wash dishes, and the waste water after washing is directly discharged, thereby wasting a large amount of heat and increasing the energy consumption of the dishwasher.

[0005] SUMMARY

[0006] One purpose of the present application is to provide a self-cleaning method of a waste heat recovery system, a self-cleaning method of a dishwasher, a control device of a dishwasher, a computer readable storage medium, and a dishwasher, which is provided with a waste heat recovery system and provides a method for self-cleaning the waste heat recovery system.

[0007] According to the self-cleaning method of the waste heat recovery system of the embodiments of the present application, the dishwasher comprises a water inlet unit, a water cup, a washing pump, and a heat exchange unit, the heat exchange unit comprises a first flow channel, the inlet of the washing pump is connected to the water cup, and the outlet of the washing pump is connected to one end of the first flow channel, the other end of the first flow channel is communicated with the water cup, and the self-cleaning method of the waste heat recovery system comprises: controlling the water inlet unit to supply water to the water cup; performing a first self-cleaning process, the first self-cleaning process comprising controlling the washing pump to drive the fluid in the water cup to flow to the first flow channel, and controlling the water cup to drain water when a first condition is met.

[0008] According to the self-cleaning method of the waste heat recovery system of the embodiments of the present application, a method for self-cleaning the waste heat recovery system is provided to improve the stability of the operation process of the dishwasher.

[0009] In addition, the self-cleaning method of the waste heat recovery system according to the above embodiments of the present application can also have the following additional technical features:

[0010] In some embodiments, the self-cleaning method of the waste heat recovery system further comprises: performing a second self-cleaning procedure, the second self-cleaning procedure comprising controlling the water inlet unit to supply water to the water cup, controlling the washing pump to drive fluid flow in the water cup to the first flow channel, and controlling the water cup to drain water when a second condition is met.

[0011] In some embodiments, the first condition comprises a time duration that the washing pump drives fluid flow in the water cup to the first flow channel being greater than or equal to a first time threshold.

[0012] In some embodiments, the second condition comprises a time duration that the washing pump drives fluid flow in the water cup to the first flow channel being greater than or equal to a second time threshold, wherein the first time threshold is greater than the second time threshold.

[0013] In some embodiments, the dishwasher further comprises a water tank and a water pump, and the heat exchange unit further comprises a second flow channel in heat exchange cooperation with the first flow channel, the water tank, the water pump and the second flow channel being connected into a loop, and the second self-cleaning procedure further comprises: controlling the water pump to drive fluid flow in the water tank between the water tank and the second flow channel.

[0014] In some embodiments, the first self-cleaning procedure further comprises heating water in the water cup to a first temperature threshold.

[0015] In some embodiments, the second self-cleaning procedure further comprises heating water in the water cup to a second temperature threshold, wherein the first temperature threshold is greater than the second temperature threshold.

[0016] In some embodiments, the dishwasher further comprises a water tank and a water pump, and the heat exchange unit further comprises a second flow channel in heat exchange cooperation with the first flow channel, the water tank, the water pump and the second flow channel being connected into a loop, and the first self-cleaning procedure further comprises: controlling the water pump to drive fluid flow in the water tank between the water tank and the second flow channel.

[0017] In some embodiments, the dishwasher further comprises a consumable dispensing module and a dispenser connected to an outlet of the washing pump, and the first self-cleaning procedure further comprises: controlling the dispenser to open, controlling the washing pump to open to drive and heat fluid, controlling the consumable dispensing module to dispense detergent; and controlling a flow path between the washing pump and the first flow channel to be connected when a third condition is met.

[0018] According to the self-cleaning method of the dishwasher, the dishwasher comprises a water inlet unit, a water cup, a washing pump and a heat exchange unit, the heat exchange unit comprises a first flow channel, an inlet of the washing pump is connected to the water cup, an outlet of the washing pump is connected to one end of the first flow channel, and the other end of the first flow channel is communicated with the water cup, the self-cleaning method of the dishwasher comprises: controlling the water inlet unit to supply water to the water cup; and performing a self-cleaning main washing process, the self-cleaning main washing process comprises an inner tank main washing process and a first self-cleaning process, the first self-cleaning process comprises controlling the washing pump to drive fluid in the water cup to flow to the first flow channel, and controlling the water cup to drain water when a first condition is met.

[0019] In some embodiments, the method further comprises: performing at least one self-cleaning rinsing process, the self-cleaning rinsing process comprising an inner tank rinsing process and a second self-cleaning process, the second self-cleaning process comprising controlling the water inlet unit to supply water to the water cup, controlling the washing pump to drive fluid in the water cup to flow to the first flow channel, and controlling the water cup to drain water when a second condition is met.

[0020] According to the control device of the dishwasher, the control device comprises: a detection unit configured to acquire a water inlet amount of the water cup; an execution unit comprising a washing pump; and a control unit in signal transmission with the detection unit and the execution unit.

[0021] In some embodiments, the control unit is configured to execute the self-cleaning method of the waste heat recovery system as described above when in operation.

[0022] In some embodiments, the control unit is configured to execute the self-cleaning method of the dishwasher as described above when in operation.

[0023] According to the computer readable storage medium, the computer readable storage medium comprises a computer program, the computer program is configured to control an electronic device in which the computer readable storage medium is located to execute the self-cleaning method of the waste heat recovery system as described above; and / or, execute the self-cleaning method of the dishwasher as described above.

[0024] According to the dishwasher, the dishwasher comprises a water inlet unit, a water cup, a washing pump and a heat exchange unit, the heat exchange unit comprises a first flow channel, an inlet of the washing pump is connected to the water cup, an outlet of the washing pump is connected to one end of the first flow channel, and the other end of the first flow channel is communicated with the water cup, the dishwasher further comprises a control unit, the control unit is configured to execute the self-cleaning method of the waste heat recovery system as described above when in operation; and / or, execute the self-cleaning method of the dishwasher as described above when in operation.

[0025] In some embodiments, the other end of the first flow channel is communicated with the water inlet unit and the water cup, a part of water inlet of the water inlet unit is communicated with the water cup, and another part is communicated with the first flow channel; or, the dishwasher further comprises an inner container, the water cup is arranged at the bottom of the inner container and communicated with the inner container, and the other end of the first flow channel is communicated with the inner container.

[0026] In some embodiments, the first flow channel extends in the up-down direction, and the lower end of the first flow channel is communicated with the washing pump. BRIEF DESCRIPTION OF DRAWINGS

[0027] FIG. 1 is a schematic view of a dishwasher according to an embodiment of the present application.

[0028] FIG. 2 is a flowchart of a self-cleaning method of a waste heat recovery system according to an embodiment of the present application.

[0029] FIG. 3 is a flowchart of a self-cleaning method of a waste heat recovery system according to another embodiment of the present application.

[0030] FIG. 4 is a flowchart of a first self-cleaning process according to an embodiment of the present application.

[0031] FIG. 5 is a flowchart of a self-cleaning method of a dishwasher according to an embodiment of the present application.

[0032] Reference signs: dishwasher 100, water cup 10, water tank 21, heat exchange unit 22, inner container 30, washing pump 41, water pump 42, drain pump 43, water distribution valve 44, water inlet valve 45, one-way valve 46, flow meter 47, spray arm 48, second on-off valve 49, first on-off valve 51, water distribution structure 52, first interface 521, second interface 522, third interface 523, water softener 60, water inlet flow channel 601. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and are not intended to limit the present application.

[0034] As shown in FIG. 1, the present application provides a dishwasher 100, which can comprise a water inlet unit and a water cup 10. The water inlet unit can be configured to supply water to the water cup 10. The water inlet unit can be connected to a water source (e.g., tap water) to supply water from the water source to the water cup 10. In addition, the dishwasher 100 can further comprise a water tank 21, and the water inlet unit can be further configured to be connected to the water tank 21 to supply water from the water tank to the water cup.

[0035] Optionally, the dishwasher 100 can further comprise a water tank 21 having a water storage space, which can be used to store water, and the water storage can facilitate the operation of the dishwasher 100, thereby improving the efficiency and effect of washing. The water inlet unit can have a water source interface (for external water source) and a water tank interface (for connecting the water tank). Specifically, the water inlet unit can be configured to control the water source to supply water to the water tank 21, to control the water source to supply water to the water cup 10, and to control the water tank 21 to supply water to the water cup 10. Optionally, the water inlet unit can comprise a first on-off valve 51, one end of which is communicated with the outlet of the water tank 21, and the first on-off valve 51 can be used to control the opening and closing of the outlet of the water tank 21. The water inlet unit can further comprise a water distribution structure 52 having a first interface 521, a second interface 522 and a third interface 523, the first interface 521 being communicated with the other end of the first on-off valve 51 and the water inlet channel 601, the second interface 522 being communicated with the inlet of the water tank 21, and the third interface 523 being connected to the inlet of the water cup 10. The water flow direction can be controlled by the water distribution structure 52. Of course, the water inlet unit of the present application can also be in other forms, and the present application mainly takes the water inlet unit comprising the first on-off valve 51 and the water distribution structure 52 as an example for description, but this is not a limitation on the protection scope of the present application. Among them, the water inlet unit in the present application can include but not limited to the following working modes.

[0036] The first working mode is that the first on-off valve 51 is closed and the first interface 521 and the second interface 522 are communicated for water replenishment to the water tank 21. In the first working mode, after the water in the water inlet channel 601 reaches the first interface 521, the water will flow to the second interface 522, thereby realizing water replenishment to the water tank 21, and a water level sensor can be arranged in the water tank 21 or a flow sensor is arranged in the water inlet channel 601, when the water amount in the water tank 21 reaches the preset water amount, the water inlet channel 601 will be closed, thereby completing the water replenishment of the water tank 21.

[0037] The second working mode is that the first on-off valve 51 is closed and the first interface 521 and the third interface 523 are communicated for water replenishment to the water cup 10. In the second working mode, after the water in the water inlet channel 601 reaches the first interface 521, the water will flow to the third interface 523, thereby realizing water supply to the water cup 10, and a flow sensor can be arranged in the water inlet channel 601, when the water amount in the water cup 10 reaches the preset water amount, the water inlet channel 601 will be closed, thereby completing the water supply to the water cup 10.

[0038] In the third working mode, the first switch valve 51 is opened, and the first interface 521 and the third interface 523 are communicated for supplying water to the water cup 10 through the water tank 21. In the third working mode, the water inlet flow channel 601 is closed, the water in the water tank 21 flows out from the outlet, flows to the first interface 521 after passing through the first switch valve 51, and then flows to the water cup 10 through the third interface 523, so as to realize the water supply to the water cup 10. When the water amount in the water cup 10 reaches the preset water amount, the first switch valve 51 can be closed, so as to complete the water supply to the water cup 10.

[0039] The water cup 10 is used for temporarily storing water and filtering washing water. During the use of the dishwasher 100, the water in the washing process can be stored in the water cup 10, so as to facilitate the centralized discharge of the washing water and collect the residues in the washing process. In addition, the dishwasher 100 can further include the inner container 30, and the inner container 30 is provided with a washing space for placing the tableware to be cleaned. The water cup 10 can be arranged at the bottom of the inner container 30 and communicated with the washing space.

[0040] The dishwasher further includes the heat exchange unit 22, which can be used for recycling the waste heat generated in the washing process. The heat exchange unit includes a first flow channel, the inlet of the washing pump is connected with the water cup, the outlet of the washing pump is connected with one end of the first flow channel, and the other end of the first flow channel is communicated with the water cup. The waste heat in the washing process can be recycled by using the heat exchange unit 22, for example, the recycled waste heat can be used to heat the water in the water tank in the foregoing embodiments.

[0041] Specifically, the heat exchange unit 22 is used for heat exchange between the waste water with waste heat in the water cup 10 and the water in the water tank 21. The heat exchange unit 22 can include but is not limited to the following examples.

[0042] Example one: the heat exchange unit 22 includes a first flow channel for heat exchange with the water in the water tank 21, and the water cup 10, the washing pump 41 and the first flow channel are connected to form a first heat exchange channel. The waste water with waste heat in the water cup 10 can be guided to exchange heat with the water in the water tank 21 by using the first heat exchange channel, so as to improve the water temperature in the water tank 21.

[0043] Example two: the heat exchange unit 22 has a second flow channel and a first flow channel for heat exchange, the second flow channel is communicated with the water storage space in the water tank 21 to form a heat exchange loop, and the water cup 10, the washing pump 41 and the first flow channel are connected to form a first heat exchange channel. The dishwasher 100 further includes a water pump 42, and the water tank 21, the water pump 42 and the second flow channel are connected to form a second heat exchange channel. In the use process, the water in the water cup 10 can be sent into the first flow channel, and the water in the water tank 21 can be circulated through the second flow channel, so as to realize the heat exchange between the water in the water tank 21 and the waste water in the water cup 10, thereby improving the energy utilization rate and avoiding the heat loss in the washing process of the dishwasher 100.

[0044] The dishwasher 100 can further comprise a water softener 60 connected between the water inlet channel 601 and the first interface 521 to supply softened water to the first interface 521. By providing the water softener 60, softened water can be supplied to improve the washing efficiency and effect of the dishwasher 100. In addition, the water softener 60 is arranged before the first interface 521 to supply softened water to the water tank 21 and the water cup 10 to achieve full-soft water washing. Optionally, the water distribution structure 52 can be installed in the water softener 60; and / or at least part of the pipeline between the water distribution structure 52 and the water tank 21 can be integrated in the water softener 60; and / or at least part of the pipeline between the water distribution structure 52 and the water cup 10 can be integrated in the water softener 60. The integration of the water softener 60 can facilitate the integration, simplify the structure of the dishwasher 100, facilitate the maintenance of the dishwasher 100, and optimize the space utilization of the dishwasher 100.

[0045] The first channel in the present application can guide the waste water with residual heat to exchange heat with the water in the water tank 21. The water path of the first channel can include but is not limited to the following embodiments and combinations thereof.

[0046] In the first embodiment, one end of the first channel is communicated with the washing pump 41, and the other end of the first channel is communicated with the water inlet unit and the water cup 10. A part of the water inlet of the water inlet unit is communicated with the water cup 10, and the other part is communicated with the first channel. The washing pump 41 can drive the water in the water cup 10 to flow into the first channel to exchange heat with the water in the water tank 21, and then return to the water cup 10 after heat exchange. In addition, when the water inlet unit is supplied with water, a part of the water inlet of the water inlet unit is supplied to the water cup 10, and the other part is supplied to the first channel, so as to realize reverse flushing of the first channel.

[0047] In the second embodiment, the dishwasher further comprises an inner container, and the water cup is arranged at the bottom of the inner container and communicated with the inner container. One end of the first channel is communicated with the washing pump 41, and the other end of the first channel is communicated with the inner container 30. The washing pump 41 can drive the water in the water cup 10 to flow into the first channel to exchange heat with the water in the water tank 21, and then flow to the inner container 30, and then gather in the water cup 10.

[0048] In the third embodiment, the first channel extends in the up-down direction, and the lower end of the first channel is communicated with the washing pump 41. During heat exchange, the washing pump 41 pumps the water in the water cup 10 into the first channel. When the washing pump 41 stops pumping, the water in the first channel can return, so as to avoid the problem of bacteria breeding caused by the waste water remaining in the first channel. In addition, even if the residual water enters the first channel to cause blockage, self-cleaning can be realized through backflow to reduce the possibility of blockage.

[0049] Some specific embodiments of the present application will be described below with reference to the accompanying drawings.

[0050] As shown in Figure 1 shows a kind of dish-washing machine 100, including inner container 30, water cup 10, water tank 21, heat exchange unit 22, water softener 60, water distribution structure 52, washing pump 41, water pump 42, drainage pump 43, water distribution valve 44, water inlet valve 45, check valve 46, flowmeter 47, first switch valve 51 and second switch valve 49 at least one.

[0051] Inner container 30 is provided with washing space, and washing space is provided with spray arm 48, spray arm 48 is connected with water distribution valve 44, water distribution valve 44 is connected with washing pump 41, and washing pump 41 is connected with the outlet of water cup 10.Water cup 10 is connected below inner container 30 and communicates with washing space.Water tank 21 is provided with storage space.Water tank 21 is an integrated device, which is arranged on the side plate of dish-washing machine 100.Second switch valve 49 is connected between washing pump 41 and heat exchange unit, for controlling the flow direction of washing water at the outlet of washing pump 41.

[0052] The overall structure of the utility model is more compact, the degree of integration is high, the required connecting pipeline is less, and the required tooling time is also shortened.Meanwhile, the heat exchange unit 22 used in the heat exchange system of the dish-washing machine 100 of the utility model is small in size, only 1 / 6 of the conventional heat exchange unit 22, which can be arranged in the water tank 21 or base of the dish-washing machine 100 more easily and flexibly.

[0053] Some specific embodiments of the utility model are described below with reference to the drawings.

[0054] As shown in Figure 1 shows a kind of dish-washing machine 100, including inner container 30, water cup 10, water tank 21, heat exchange unit 22, water softener 60, water distribution structure 52, washing pump 41, water pump 42, drainage pump 43, water distribution valve 44, water inlet valve 45, check valve 46, flowmeter 47, first switch valve 51 and second switch valve 49 at least one.

[0055] Inner container 30 is provided with washing space, and washing space is provided with spray arm 48, spray arm 48 is connected with water distribution valve 44, water distribution valve 44 is connected with washing pump 41, and washing pump 41 is connected with the outlet of water cup 10.Water cup 10 is connected below inner container 30 and communicates with washing space.Water tank 21 is provided with storage space.Water tank 21 is an integrated device, which is arranged on the side plate of dish-washing machine 100.Second switch valve 49 is connected between washing pump 41 and heat exchange unit, for controlling the flow direction of washing water at the outlet of washing pump 41.

[0056] The overall structure of the utility model is more compact, the degree of integration is high, the required connecting pipeline is less, and the required tooling time is also shortened.Meanwhile, the heat exchange unit 22 used in the heat exchange system of the dish-washing machine 100 of the utility model is small in size, only 1 / 6 of the conventional heat exchange unit 22, which can be arranged in the water tank 21 or base of the dish-washing machine 100 more easily and flexibly.

[0057] In addition, the dishwasher 100 of the present application further comprises a control unit, which, when in operation, performs the following self-cleaning method of the waste heat recovery system; and / or, performs the following self-cleaning method of the dishwasher.

[0058] As shown in FIG. 2, the present application further provides a self-cleaning method of a waste heat recovery system, which can be used in the dishwasher described above, and the waste heat recovery system can comprise the heat exchange unit described above, and the self-cleaning method of the waste heat recovery system comprises:

[0059] Step S1: controlling the water inlet unit to supply water to the water cup.

[0060] In combination with the foregoing, water can be supplied to the water cup through the water tank and / or the water source, and the water supply amount of the water cup can be detected by a flow sensor, a water level sensor, etc., and when the water supply amount of the water cup is less than the minimum water supply amount, the water inlet unit can be controlled to supply water to the water cup, and when the water supply amount of the water cup is greater than or equal to the minimum water supply amount, the water supply of the water cup is completed. Alternatively, the water supply method can comprise: when a fifth condition is met, controlling the water tank to supply water to the water cup, the fifth condition comprising that the water supply amount of the water cup is less than a first set water supply amount and the water level in the water tank is greater than a minimum water level; and when a sixth condition is met, controlling the water source to supply water to the water cup, the sixth condition comprising that the water supply amount of the water cup is less than the first set water supply amount and the water level in the water tank is less than or equal to the minimum water level.

[0061] Step S2: performing a first self-cleaning process.

[0062] The first self-cleaning process comprises controlling the washing pump to drive the fluid in the water cup to flow to the first flow channel. The water in the water cup flows along the water cup, the washing pump, the first flow channel, and the water cup; or the water in the water cup flows along the water cup, the washing pump, the first flow channel, the inner tank, and the water cup. The first flow channel can be flushed and cleaned by the water in the water cup, thereby achieving self-cleaning of the first flow channel. The first self-cleaning process can further comprise controlling the water cup to drain water when a first condition is met. The sewage after the first self-cleaning is discharged to complete the first self-cleaning process. Through the above cleaning, the residues in the first flow channel can be discharged in time to avoid problems such as blockage caused by the accumulation of residues in the first flow channel, improve the stability of the waste heat recovery system of the dishwasher, and prolong the cleaning period. Thus, the waste water in the water cup during the washing process can be conveniently recovered for waste heat, the stability of the dishwasher can be improved, and energy saving and environmental protection can be achieved.

[0063] As shown in FIG. 3, in some embodiments, the self-cleaning method of the waste heat recovery system further comprises:

[0064] Step S3: performing a second self-cleaning process.

[0065] By increasing the second self-cleaning process, the self-cleaning efficiency and effect of the waste heat recovery system can be improved under the joint action of the first and second self-cleaning processes. The second self-cleaning process includes controlling the water inlet unit to supply water to the water cup, at which time the wastewater in the water cup is discharged, and clean water is supplied to the water cup, and the clean water in the water cup is used for self-cleaning. The second self-cleaning process also includes controlling the washing pump to drive the fluid in the water cup to flow to the first flow channel, wherein the water in the water cup flows along the water cup, the washing pump, the first flow channel, and the water cup; or the water in the water cup flows along the water cup, the washing pump, the first flow channel, the inner container, and the water cup. The water in the water cup can be used to flush and clean the first flow channel, thereby achieving self-cleaning of the first flow channel. The second self-cleaning process also includes controlling the water cup to discharge water when the second condition is met. The wastewater after the second self-cleaning is discharged to complete the second self-cleaning process. Through the above cleaning, the residue in the first flow channel can be discharged in time to avoid problems such as blockage caused by the accumulation of residue in the first flow channel, improve the stability of the waste heat recovery system of the dishwasher, and prolong the cleaning period. Thus, the wastewater in the water cup during the washing process can be conveniently recovered for waste heat, the stability of the dishwasher can be improved, and energy saving and environmental protection can be achieved.

[0066] Optionally, the first condition includes that the time length of driving the fluid in the water cup to flow to the first flow channel by the washing pump is greater than or equal to a first time threshold; and the second condition includes that the time length of driving the fluid in the water cup to flow to the first flow channel by the washing pump is greater than or equal to a second time threshold. The working time length of the first and second self-cleaning processes can be limited to achieve stable operation of the self-cleaning process and improve the self-cleaning efficiency and effect of the waste heat recovery system.

[0067] Further, the first time threshold is greater than the second time threshold. Optionally, the first time threshold can be set to a range of 5 minutes to 100 minutes. The second time threshold can be set to a range of 5 minutes to 50 minutes. For example, the first time threshold can be set to 5 minutes, 10 minutes, 30 minutes, 60 minutes, or 90 minutes, etc.; and the second time threshold can be set to 5 minutes, 10 minutes, 15 minutes, 24 minutes, or 30 minutes, etc.

[0068] Optionally, the first self-cleaning process further includes heating the water in the water cup to a first temperature threshold; and / or the second self-cleaning process further includes heating the water in the water cup to a second temperature threshold. By heating the water in the water cup, the purpose of using hot water for self-cleaning of the waste heat recovery system can be achieved, and the efficiency and effect of self-cleaning can be improved.

[0069] Further, the first temperature threshold is greater than the second temperature threshold. In combination with the foregoing embodiments, the water temperature and flushing duration of the first self-cleaning process are higher than the water temperature and flushing duration of the second self-cleaning process, the first self-cleaning process can complete the self-cleaning main washing process of the waste heat recovery system, and the second self-cleaning process can complete the self-cleaning rinsing process of the waste heat recovery system, so that the cleaning efficiency and effect of the waste heat recovery system can be improved.

[0070] Optionally, the first temperature threshold can be set to a range of 5-80°C. The second temperature threshold can be set to a range of 5-50°C. For example, the first temperature threshold can be set to 5°C, 10°C, 30°C, 60°C, or 80°C, etc. The second temperature threshold can be set to 5°C, 10°C, 15°C, 24°C, or 30°C, etc.

[0071] Optionally, the dishwasher further comprises a water tank and a water pump, and the heat exchange unit further comprises a second flow channel in heat exchange cooperation with the first flow channel, and the water tank, the water pump, and the second flow channel are connected to form a loop.

[0072] In some embodiments, the first self-cleaning process further comprises: controlling the water pump to drive the fluid in the water tank to circulate between the water tank and the second flow channel. In the waste heat recovery process, the waste heat in the washing water can be recovered for heating the water in the water tank, so as to reduce the loss of heat and improve the energy utilization rate. In addition, in the process of performing the first self-cleaning on the waste heat recovery system, the washing water can be heated, at this time, through the combination of the water pump and the water tank, the waste heat in the water for cleaning the first flow channel can be recovered in the first self-cleaning process, the water in the water tank can be conveniently heated, and the waste heat can be recovered, so as to improve the energy efficiency of the dishwasher, save energy, and protect the environment.

[0073] In some embodiments, the second self-cleaning process further comprises: controlling the water pump to drive the fluid in the water tank to circulate between the water tank and the second flow channel. In the waste heat recovery process, the waste heat in the washing water can be recovered for heating the water in the water tank, so as to reduce the loss of heat and improve the energy utilization rate. In addition, in the process of performing the second self-cleaning on the waste heat recovery system, the washing water can be heated, at this time, through the combination of the water pump and the water tank, the waste heat in the water for cleaning the first flow channel can be recovered in the second self-cleaning process, the water in the water tank can be conveniently heated, and the waste heat can be recovered, so as to improve the energy efficiency of the dishwasher, save energy, and protect the environment.

[0074] In the first self-cleaning process in the present application, a detergent can also be put in to optimize the self-cleaning effect on the first flow channel, and the first flow channel is rinsed in the second self-cleaning process to avoid the influence of the residual detergent in the first flow channel on the operation of the dishwasher. Optionally, the dishwasher further comprises a consumable putting module and a distributor connected to the outlet of the washing pump.

[0075] As shown in FIG. 4, the first self-cleaning process further comprises:

[0076] Step S21, control the distributor to open, control the washing pump to open to drive and heat the fluid, and control the consumable putting module to put in the detergent.

[0077] In which, the consumable can be put in by the consumable putting module, and the water in the water cup is circulated along the water cup, the washing pump, the distributor, etc. to realize the dissolution and heating of the consumable, so as to improve the cleaning effect of the detergent. Through this step, the cleaning performance of the detergent can be improved, and in the next step, the waste heat recovery system can be quickly and effectively cleaned.

[0078] Step S22, when the third condition is met, control the distributor to close, and the flow path between the washing pump and the first flow channel is connected.

[0079] In which, after the detergent is dissolved in the water, the water in the water cup is the water with the detergent, and at this time the water in the water cup also has a certain temperature, which is equivalent to completing the preparation work before self-cleaning. At this time, the distributor is closed, and the flow path between the washing pump and the first flow channel is connected, and the water with the dissolved detergent is introduced into the first flow channel and circulated along the water cup, the washing pump, the first flow channel, the water cup, etc., which can effectively improve the efficiency and effect of washing.

[0080] In which, the third condition can include consumable putting completion, detergent dissolution completion, etc. For example, the third condition can include that the opening time of the washing pump and the distributor reaches a third time threshold. The third time threshold can be set to a range of 10 seconds to 10 minutes. The third time threshold can be set to 10 seconds, 50 seconds, 90 seconds, 5 minutes or 10 minutes, etc. The second time threshold can be set to 5 minutes, 10 minutes, 15 minutes, 24 minutes or 30 minutes, etc.

[0081] According to the foregoing, the present application provides some specific embodiments.

[0082] Embodiment 1 provides a self-cleaning method of a waste heat recovery system of an embodiment.

[0083] The first switch valve 51 is opened, and the water tank 21 starts to release water. The water flows through the first switch valve 51 and the water distribution structure 52 into the water cup 10. The first switch valve 51 is closed when the water cup 10 is filled with water. Then, the water amount in the water cup 10 is determined by the water amount determination function of the dishwasher 100. If the water amount in the water cup 10 reaches the preset value, the self-cleaning of the waste heat recovery system is started. If the water amount does not reach the preset value, the water inlet valve 45 is opened, and the water distribution structure 52 is switched so that the first interface 521 and the third interface 523 are connected. The tap water flows through the water inlet valve 45 and the flow meter 47, enters the water softener 60 for softening treatment, and then enters the water cup 10 through the water distribution structure 52. When the water amount reaches the set value (water amount range 3.0L-3.2L), the water inlet valve 45 and the water distribution structure 52 are powered off. The waste heat recovery system cleaning timing is executed.

[0084] The first self-cleaning process: the consumable feeding module feeds the detergent, the washing pump and the distribution valve are opened for washing distribution and heating for 90s, and then the washing pump and the distribution valve are opened for washing and heating for 5min. During the above time, the pump rotates at 2900, and the distributor executes the action logic of 3 top 2 in 2. Then the water inlet valve 45 is opened, and the water distribution structure 52 is switched so that the first interface 521 and the second interface 522 are connected. The tap water flows through the water inlet valve 45 and the flow meter 47, enters the water softener 60 for softening treatment, and then enters the water tank 21 through the water distribution structure 52. When the water amount reaches the set value (water amount range 2.5L-3.0L), the water inlet valve 45 is closed, and the water tank 21 is filled with water. Then the second switch valve 49 is opened to connect the washing pump with the first flow channel; the water pump 42 is opened, the water distribution structure 52 is adjusted to the closed state, and the water flows through the water cup 10, the washing pump, the second switch valve 49 into the heat exchange unit, and then back to the water cup 10 to complete the cleaning cycle. The process is executed for 30min, during which the washing pump keeps rotating at high speed and heating. When the temperature reaches 70℃, the heating is stopped, but the rotation continues to complete the remaining time. Then the water is drained and the residue is discharged, and the next washing stage is entered;

[0085] Second self-cleaning process: open the water inlet valve 45, switch the first interface 521 and the third interface 523 of the water distribution structure 52 to be connected, after the tap water enters the water softener 60 for softening treatment through the water inlet valve 45, it enters the water cup 10 through the water distribution structure 52, and when the water volume reaches the set value (water volume range 3.0L-3.2L), the water inlet valve 45 and the water distribution structure 52 are powered off. Then open the second switch valve 49 to connect the washing pump and the first flow channel; open the water pump 42, adjust the water distribution structure 52 to the closed state, let the water pass through the water cup 10, the washing pump, the second switch valve 49 into the heat exchange unit, and then back to the water cup 10 to complete the cleaning cycle. The process is executed for 10 minutes, during which the washing pump keeps rotating at high speed and heating until the temperature reaches 40℃, and then stops heating but continues to run for the remaining time. After that, drain and discharge, complete the self-cleaning process of the waste heat recovery system of the dishwasher 100.

[0086] Example 2 provides another embodiment of the self-cleaning method of the waste heat recovery system.

[0087] Open the first switch valve 51, the water tank 21 starts to release water, the water flow enters the water cup 10 through the first switch valve 51 and the water distribution structure 52, and the first switch valve 51 is closed after the water cup 10 is filled with water before washing. Then determine whether the water volume in the water cup 10 at this time reaches the preset value through the water volume determination function of the dishwasher 100. If it is determined that the water volume in the water cup 10 at this time reaches the preset value, start the self-cleaning of the waste heat recovery system. If it does not reach, open the water inlet valve 45 at this time, switch the water distribution structure 52 so that the first interface 521 and the third interface 523 are connected, and after the tap water enters the water softener 60 for softening treatment through the water inlet valve 45 and the flowmeter 47, it enters the water cup 10 through the water distribution structure 52. When the water volume reaches the set value (water volume range 3.0L-3.2L), the water inlet valve 45 and the water distribution structure 52 are powered off. Execute the waste heat recovery system cleaning timing.

[0088] The first self-cleaning process: the consumable feeding module feeds the detergent, the washing pump and the distribution valve are opened to perform washing distribution and heating for 90s, then the washing pump and the distribution valve are opened to perform washing and heating for 5min, during the above time, the pump rotates at 2900, and the dispenser executes the action logic of 2 / 3 / 2 of the second row of the second column. Then the water inlet valve 45 is opened, the water distribution structure 52 is switched to make the first interface 521 and the second interface 522 communicate, tap water enters the water softener 60 for softening treatment after passing through the water inlet valve 45 and the flow meter 47, then enters the water tank 21 through the water distribution structure 52, and when the water volume reaches the set value (water volume range 2.5L-3.0L), the water inlet valve 45 is closed, and the water tank 21 is filled with water. Then open the second switch valve 49 to connect the washing pump with the first flow channel; open the water pump 42, adjust the water distribution structure 52 to the closed state, let the water pass through the water cup 10, the washing pump and the second switch valve 49 into the heat exchange unit, and then back to the water cup 10 to complete the cleaning cycle. When the water pump 42 is opened, the water flow in the water tank 21 will complete the water tank 21 cold water circulation through the second flow channel. The cold water circulation and the hot water circulation are carried out in the heat exchange unit, the heat in the hot water circulation is transferred to the cold water circulation, and finally the heat is stored in the water tank 21. The process is executed for 30min, during which the washing pump keeps rotating at high speed and heating, and stops heating when the temperature reaches 70℃, but continues to run to complete the remaining time. Then drain and discharge the residue to enter the next washing stage;

[0089] The second self-cleaning process: open the first switch valve 51, and the water tank 21 starts to discharge water. The water flow enters the water cup 10 through the first switch valve 51 and the water distribution structure 52, and the first switch valve 51 is closed after the water cup 10 is filled with water before washing. Then open the second switch valve 49 and the water pump 42, adjust the water distribution structure 52 to the closed state, let the water pass through the water cup 10, the washing pump and the second switch valve 49 into the heat exchange unit, and then back to the water cup 10 to complete the cleaning cycle. The process is executed for 10min, during which the washing pump keeps rotating at high speed and heating, and stops heating when the temperature reaches 40℃, but continues to run to complete the remaining time. Then open the water inlet valve 45, switch the water distribution structure 52 to make the first interface 521 and the second interface 522 communicate, and then the tap water enters the water tank 21 after passing through the water inlet valve 45 and the water softener 60 for softening treatment. When the water volume reaches the set value (water volume range 2.5L-3.0L), the water inlet valve 45 is closed, and the water tank 21 is filled with water. Then drain and discharge the residue to complete the self-cleaning process of the heat recovery system of the dishwasher 100.

[0090] As shown in FIG. 5, the application also provides a self-cleaning method of a dishwasher. The dishwasher can be the dishwasher described in the foregoing embodiments. The self-cleaning method of the dishwasher includes:

[0091] Step S10: controlling the water inlet unit to fill water into the water cup.

[0092] In combination with the foregoing, water can be supplied to the water cup through the water tank and / or the water source, and the water inflow amount of the water cup can be detected by a flow sensor, a water level sensor, etc. When the water inflow amount of the water cup is less than the minimum water inflow amount, the water inflow unit can be controlled to supply water to the water cup, and when the water inflow amount of the water cup is greater than or equal to the minimum water inflow amount, the water inflow of the water cup is completed.

[0093] Specifically, from the start of the self-cleaning main washing procedure, the first switch valve 51 is opened, and the water tank 21 starts to supply water. The water flows through the first switch valve 51 and the water distribution structure 52 into the water cup 10, completing the pre-washing water inflow of the water cup 10, and then the first switch valve 51 is closed. Then, the water amount in the water cup 10 at this time is determined by the water amount determination function of the dishwasher 100. If the water amount does not reach the preset value, the water inflow valve 45 is opened at this time, and the water distribution structure 52 is switched so that the first interface 521 and the third interface 523 are in communication. After the tap water enters the water softener 60 for softening treatment, it enters the water cup 10 through the water distribution structure 52. When the water amount reaches the set value (water amount range 3.6L-4.0L), the water inflow valve 45 and the water distribution structure 52 are powered off, and the self-cleaning main washing timing sequence is started.

[0094] Step S20, execute the self-cleaning main washing procedure, which includes the inner tank main washing procedure and the first self-cleaning procedure, the first self-cleaning procedure including controlling the washing pump to drive the fluid in the water cup to flow to the first flow channel, and controlling the water cup to drain when the first condition is met.

[0095] Specifically, if the water amount in the water cup 10 at this time is determined by the water amount determination function of the dishwasher 100 to be less than the preset value, the water inflow valve 45 is opened at this time, and the water distribution structure 52 is switched so that the first interface 521 and the third interface 523 are in communication. After the tap water enters the water softener 60 for softening treatment, it enters the water cup 10 through the water distribution structure 52. When the water amount reaches the set value (water amount range 0.8L-1.0L), the water inflow valve 45 and the water distribution structure 52 are powered off, and the self-cleaning main washing timing sequence is started. Washing, distribution and heating are all performed, and the washing pump speed is greater than 2900 rpm at this time. This process lasts for 10 to 15 minutes, and heating is stopped when the cavity temperature reaches 60°C. Then, washing is performed for 10 minutes, and then heating is continued to 70°C, while the washing process continues.

[0096] Subsequently, the first self-cleaning process of the waste heat recovery system is performed, the water inlet valve 45 is opened, the water distribution structure 52 is switched so that the first interface 521 communicates with the water distribution structure 52, tap water enters the water softener 60 for softening treatment through the water inlet valve 45, and then enters the water tank 21 through the water distribution structure 52. When the water volume reaches the set value (water volume range 2.5L-3.0L), the water inlet valve 45 is closed, and the water tank 21 is filled with water. Then the second switch valve 49 and the water pump 42 are opened, and the water distribution valve 44 is adjusted to the closed state. The water in the water cup 10 flows through the second switch valve 49 into the heat exchange unit, and then returns to the water cup 10 to complete the hot water washing cycle (cleaning process). When the water pump 42 is opened, the water in the water tank 21 flows through the second flow channel and then returns to the water tank 21 to complete the cold water circulation of the water tank 21. The cold water circulation and the hot water circulation are performed in the heat exchange unit, the heat in the hot water circulation is transferred to the cold water circulation, and finally the heat is stored in the water tank 21 (the process is performed for 6-9 minutes). At the same time, the process completes the cleaning and washing of the waste heat recovery system. Subsequently, the timing of the subsequent self-cleaning main washing process is completed.

[0097] As shown in FIG. 5, the self-cleaning method of the dishwasher further comprises:

[0098] Step S30, performing at least one self-cleaning rinse process, the self-cleaning rinse process comprising an inner tank rinse process and a second self-cleaning process, the second self-cleaning process comprising controlling the water inlet unit to supply water to the water cup, controlling the washing pump to drive the fluid flow in the water cup to the first flow channel, and controlling the water cup to drain water when the second condition is met.

[0099] Specifically, when the first rinse self-cleaning timing starts, the first switch valve 51 is opened, the water tank 21 starts to drain water, the water flows through the first switch valve 51 and the water distribution structure 52 into the water cup 10, and the water cup 10 is filled with water before washing. Then the first switch valve 51 is closed, the water inlet valve 45 is opened, and the water distribution structure 52 is switched so that the first interface 521 communicates with the third interface 523. After tap water enters the water softener 60 for softening treatment through the water inlet valve 45, it enters the water cup 10 through the water distribution structure 52. When the water volume reaches the set value (water volume range 0.6L-1.2L), the water inlet valve 45 and the water distribution structure 52 are powered off, and the first rinse self-cleaning process is started. During this process, the cavity temperature will rise to 45℃. Eight minutes before the first rinse is completed, the water inlet valve 45 is opened, the water distribution structure 52 is switched so that the first interface 521 communicates with the second interface 522, and the water tank 21 is replenished. When the preset water volume (2.5L-3.0L) is reached, the water inlet valve 45 is closed.

[0100] Subsequently, the second self-cleaning process of the waste heat recovery system is performed, the second switch valve 49 and the water pump 42 are opened, the water distribution valve 44 is adjusted to the closed state, the water flow in the washing pump passes through the water cup 10 into the heat exchange unit, and then returns to the water cup 10 to complete the washing hot water circulation. When the water pump 42 is opened, the water flow in the water tank 21 is transported to the second flow channel and returns to the water tank 21 to complete the water tank 21 cold water circulation. The cold water circulation and the hot water circulation are performed in the heat exchange unit, the heat in the hot water circulation is transferred to the cold water circulation, and finally the heat is stored in the water tank 21 (the process is performed for 3-5 minutes). At the same time, the process completes the cleaning and washing of the heat exchange unit. Subsequently, the subsequent rinse self-cleaning timing is completed;

[0101] When the second rinse self-cleaning timing starts, the first switch valve 51 is opened, the water tank 21 starts to discharge water, the water flow passes through the first switch valve 51 and the water distribution structure 52 into the water cup 10 to complete the water cup 10 water before washing, then the first switch valve 51 is closed, then the water inlet valve 45 is opened, the water distribution structure 52 is switched to make the first interface 521 and the third interface 523 communicate, the tap water enters the water softener 60 after the water inlet valve 45, and then enters the water cup 10 after softening treatment, and then the water amount reaches the set value (water amount range 1L-1.6L), the water inlet valve 45 and the water distribution structure 52 are powered off, and the second rinse self-cleaning starts. During the process, the cavity temperature rises to 55°C. 8 minutes before the second rinse is completed, the water inlet valve 45 is opened, the water distribution structure 52 is switched to make the first interface 521 and the water distribution structure 52 communicate, and the water tank 21 is replenished. When the preset water amount (2.5L-3.0L) is reached, the water inlet valve 45 is closed.

[0102] Subsequently, the third self-cleaning process of the waste heat recovery system is performed, the second switch valve 49 and the water pump 42 are opened, the water distribution valve 44 is adjusted to the closed state, the water flow in the washing pump passes through the water cup 10 into the heat exchange unit, and then returns to the water cup 10 to complete the washing hot water circulation. When the water pump 42 is opened, the water flow in the water tank 21 is transported to the second flow channel and returns to the water tank 21 to complete the water tank 21 cold water circulation. The cold water circulation and the hot water circulation are performed in the heat exchange unit, the heat in the hot water circulation is transferred to the cold water circulation, and finally the heat is stored in the water tank 21 (the process is performed for 3-5 minutes). At the same time, the process completes the cleaning and washing of the heat exchange unit. Subsequently, the subsequent timing of the second rinse self-cleaning and the subsequent drying self-cleaning timing are completed.

[0103] The application also provides a control device of a dishwasher, comprising a detection unit, an execution unit and a control unit. The detection unit is used to obtain the water inlet amount of the water cup; the execution unit comprises a washing pump; the control unit is in signal transmission with the detection unit and the execution unit, and the control unit runs to execute the self-cleaning method of the waste heat recovery system as described above; and / or, executes the self-cleaning method of the dishwasher as described above.

[0104] The application also provides a computer readable storage medium comprising a computer program which, when executed, controls an electronic device in which the computer readable storage medium is located to perform the self-cleaning method of the waste heat recovery system as described above; and / or, to perform the self-cleaning method of the dishwasher as described above.

[0105] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0106] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0107] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0108] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0109] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0110] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A self-cleaning method of a waste heat recovery system for a dishwasher, wherein, The dishwasher comprises a water inlet unit, a water cup, a washing pump and a heat exchange unit, the heat exchange unit comprises a first flow channel, an inlet of the washing pump is connected to the water cup, an outlet of the washing pump is connected to one end of the first flow channel, the other end of the first flow channel is communicated with the water cup, and the self-cleaning method of the waste heat recovery system comprises: controlling the water inlet unit to supply water to the water cup; performing a first self-cleaning process, the first self-cleaning process comprising controlling the washing pump to drive the flow of fluid in the water cup to the first flow channel, and controlling the water cup to drain when a first condition is met.

2. The self-cleaning method of a waste heat recovery system according to claim 1, wherein, Further comprising: performing a second self-cleaning process, the second self-cleaning process comprising controlling the water inlet unit to supply water to the water cup, controlling the washing pump to drive the flow of fluid in the water cup to the first flow channel, and controlling the water cup to drain when a second condition is met.

3. The self-cleaning method of a waste heat recovery system according to claim 2, wherein, The first condition comprises that the duration of the washing pump driving the flow of fluid in the water cup to the first flow channel is greater than or equal to a first time threshold; the second condition comprises that the duration of the washing pump driving the flow of fluid in the water cup to the first flow channel is greater than or equal to a second time threshold, wherein the first time threshold is greater than the second time threshold.

4. The self-cleaning method of a waste heat recovery system according to claim 2 or 3, wherein, The dishwasher further comprises a water tank and a water pump, the heat exchange unit further comprises a second flow channel in heat exchange cooperation with the first flow channel, the water tank, the water pump and the second flow channel are connected to form a loop, and the second self-cleaning process further comprises: controlling the water pump to drive the flow of fluid in the water tank between the water tank and the second flow channel.

5. The self-cleaning method of a waste heat recovery system according to any one of claims 2-4, wherein, The first self-cleaning process further comprises heating the water in the water cup to a first temperature threshold; and / or, the second self-cleaning process further comprises heating the water in the water cup to a second temperature threshold, wherein the first temperature threshold is greater than the second temperature threshold.

6. The self-cleaning method of a waste heat recovery system according to any one of claims 1 to 5, wherein, The dishwasher further comprises a water tank and a water pump, the heat exchange unit further comprises a second flow channel in heat exchange cooperation with the first flow channel, the water tank, the water pump and the second flow channel are connected to form a loop, and the first self-cleaning process further comprises: controlling the water pump to drive the flow of fluid in the water tank between the water tank and the second flow channel.

7. The self-cleaning method of a waste heat recovery system according to any one of claims 1 to 6, wherein, The dishwasher further comprises a consumable feeding module and a distributor, the distributor is connected to the outlet of the washing pump, and the first self-cleaning process further comprises: controlling the distributor to open, controlling the washing pump to open to drive and heat the fluid, and controlling the consumable feeding module to feed the detergent; controlling the flow path between the washing pump and the first flow channel to be connected when a third condition is met. 8.A method of self-cleaning of a dishwasher, wherein, The dishwasher comprises a water inlet unit, a water cup, a washing pump and a heat exchange unit, the heat exchange unit comprises a first flow channel, an inlet of the washing pump is connected to the water cup, an outlet of the washing pump is connected to one end of the first flow channel, the other end of the first flow channel is communicated with the water cup, and the self-cleaning method of the dishwasher comprises: controlling the water inlet unit to supply water to the water cup; performing a self-cleaning main washing procedure, the self-cleaning main washing procedure comprising a tub main washing procedure and a first self-cleaning procedure, the first self-cleaning procedure comprising controlling the washing pump to drive fluid flow in the water cup to the first flow channel, and controlling the water cup to drain when a first condition is met. 9.The self-cleaning method of the dish washer according to claim 8, wherein, Further comprising: performing at least one self-cleaning rinsing procedure, the self-cleaning rinsing procedure comprising a tub rinsing procedure and a second self-cleaning procedure, the second self-cleaning procedure comprising controlling the water inlet unit to supply water to the water cup, controlling the washing pump to drive fluid flow in the water cup to the first flow channel, and controlling the water cup to drain when a second condition is met.

10. A control device of a dishwasher, wherein, Comprising: a detection unit configured to obtain a water inlet amount of the water cup; a performing unit comprising a washing pump; a control unit in signal transmission with the detection unit and the performing unit, wherein the control unit is configured to perform the self-cleaning method of the heat recovery system according to any one of claims 1-7; and / or, perform the self-cleaning method of the dishwasher according to claim 8 or 9.

11. A computer readable storage medium, wherein, The computer readable storage medium comprises a computer program, the computer program is configured to control the electronic device where the readable storage medium is located to perform the self-cleaning method of the heat recovery system according to any one of claims 1-7; and / or, perform the self-cleaning method of the dishwasher according to claim 8 or 9.

12. A dishwasher, wherein, The dishwasher comprises a water inlet unit, a water cup, a washing pump and a heat exchange unit, the heat exchange unit comprises a first flow channel, an inlet of the washing pump is connected to the water cup, and an outlet of the washing pump is connected to one end of the first flow channel, the other end of the first flow channel is communicated with the water cup, The dishwasher further comprises a control unit, the control unit is configured to perform the self-cleaning method of the heat recovery system according to any one of claims 1-7; and / or, perform the self-cleaning method of the dishwasher according to claim 8 or 9.

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