CN112515599A

CN112515599A - Dishwasher, control method for dishwasher, and storage medium

Info

Publication number: CN112515599A
Application number: CN202011379373.6A
Authority: CN
Inventors: 马曾文; 和家宝; 陈瑶洋; 梁桂源; 李胤媛
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-03-19
Anticipated expiration: 2040-11-30
Also published as: CN112515599B

Abstract

The present application relates to a dishwasher, a control method of the dishwasher, and a storage medium. The dishwasher includes: the steam spraying arm is arranged in the inner container; a steam generator; the steam spraying connecting pipe is communicated with the outlet of the steam generator and the inlet of the steam spraying arm; the circulating fan is arranged in the inner container; a steam circulation pipe; the air inlet is connected with the air outlet of the circulating fan, and the air outlet is communicated with the steam spraying connecting pipe through a steam circulating pipe; a reduction heater disposed inside the sorbent cartridge for thermal reduction; the controller is connected with the circulating fan and the reduction heater and is used for controlling the circulating fan to be started to drive the hot steam in the inner container to circulate after the steam generator is closed, and the hot steam in the circulation is dried through the adsorbent box; and controlling the reduction heater to be started after the disinfection work is finished, so that the adsorbent in the adsorbent box is subjected to thermal reduction desorption. The dishwasher can shorten the operation time, reduce the energy consumption and avoid the secondary pollution of tableware.

Description

Dishwasher, control method for dishwasher, and storage medium

Technical Field

The present application relates to the field of dishwasher technology, and in particular, to a dishwasher, a control method for a dishwasher, and a storage medium.

Background

A dishwasher is a household appliance for automatically cleaning dishes. With the improvement of living standard of people, the dish washing machine is more and more popular. Most of the conventional dish washing machines generally have only washing and drying functions, and although the dish washing machines can simply sterilize dishes by using hot water, the disinfection effect cannot be achieved. In order to enable dishwashers to disinfect dishware, sterilizable dishwashers have been developed.

However, most existing sterilizable dishwashers are both ultraviolet and steam sterilizable. Wherein, the existing steam disinfection mostly arranges the steam generator on the top of the inner container of the dish washer, and the steam is sprayed downwards from the top to sterilize the tableware at high temperature. After the sterilization is finished, the air is further heated by a PTC (Positive Temperature Coefficient) heater, and the hot air is conveyed into the inner container to dry the tableware by the hot air. However, the high-temperature sterilization and the hot air drying cannot be performed simultaneously, resulting in a long operation time and high power consumption of the dishwasher. In addition, the PTC heater is adopted to lead the outside air into the inner container, which is very easy to cause secondary pollution to the tableware.

Disclosure of Invention

The invention provides a dish washer, a control method of the dish washer and a storage medium, aiming at the problems that the disinfection and the drying can not be carried out simultaneously by utilizing a PTC heater, so that the dish washer has long operation time, high energy consumption and easy secondary pollution.

A dishwasher, comprising:

an inner container;

the steam spraying arm is arranged in the inner container and is used for spraying steam to disinfect tableware in the inner container;

a steam generator for generating hot steam;

the steam spraying connecting pipe is used for communicating the outlet of the steam generator with the inlet of the steam spraying arm and is used for conveying hot steam to the steam spraying arm;

the circulating fan is arranged in the inner container and used for providing circulating power;

the steam circulating pipe is used for circularly conveying hot steam;

the adsorbent box is used for drying the circulated hot steam, and the air inlet of the adsorbent box is connected with the air outlet of the circulating fan;

the reduction heater is arranged in the adsorbent box and used for thermal reduction;

the controller is connected with the circulating fan and the reduction heater and is used for controlling the circulating fan to be started to drive hot steam in the inner container to circulate after the steam generator is closed, so that the circulated hot steam is dried through the adsorbent box; the controller is also used for controlling the reduction heater to be started after the disinfection work is finished, so that the adsorbent in the adsorbent box is subjected to thermal reduction desorption.

In one embodiment, the method further comprises the following steps:

the water inlet pipe is connected with an inlet of the steam generator and is used for conveying water to the steam generator;

a gas-liquid separator for drying the hot steam;

the first steam inlet pipe is used for communicating an outlet of the steam generator with a gas inlet of the gas-liquid separator and is used for conveying hot steam generated by the steam generator to the gas-liquid separator for drying;

the second steam inlet pipe is used for communicating the gas outlet of the gas-liquid separator with the steam spraying connecting pipe and is used for conveying the dried hot steam to the steam spraying connecting pipe;

the controller is connected with the steam generator and the water inlet electromagnetic valve and is used for controlling the water inlet electromagnetic valve to be opened and communicated with the water inlet pipe and the steam generator when the steam generator enters the disinfection work so as to enable the steam generator to start to feed water; the controller is also used for controlling the steam generator to be started to generate hot steam after water is fed into the steam generator, and the generated hot steam is conveyed to the gas-liquid separator through the first steam inlet pipe and then conveyed to the steam spraying connecting pipe through the second steam pipe after being dried.

In one embodiment, the method further comprises the following steps:

the steam heater is connected with the second steam inlet pipe and the steam circulating pipe at the inlet and connected with the steam spraying connecting pipe at the outlet and used for heating hot steam;

the steam electromagnetic valve is arranged on the steam spraying connecting pipe and is used for controlling the delivery of hot steam;

the temperature sensor is arranged on the steam spraying connecting pipe and used for detecting the temperature of hot steam;

the steam heater, the temperature sensor and the steam electromagnetic valve are connected with the controller, and the controller is also used for controlling the steam heater to start heating when the temperature of the hot steam in the steam spraying connecting pipe does not meet the sterilization temperature; when the temperature of the hot steam in the steam spraying connecting pipe reaches the sterilization temperature, the steam electromagnetic valve is controlled to be communicated with the steam spraying connecting pipe and the steam spraying arm, so that the hot steam is conveyed to the steam spraying arm.

In one embodiment, the method further comprises the following steps:

a drain pipe;

the draining pump is arranged on the draining pipe and used for pushing the draining water;

and the water storage tank is used for storing water generated by thermal reduction desorption of the adsorbent box.

In one embodiment, the method further comprises the following steps:

the pipeline is used for communicating the adsorbent box with the outside and discharging steam generated by thermal reduction desorption;

a pipeline electromagnetic valve arranged on the pipeline and a circulating electromagnetic valve arranged on the steam circulating pipe.

In one embodiment, the method further comprises the following steps:

the flow sensor is arranged on the steam spraying connecting pipe, is connected with the controller and is used for detecting the steam flow of the hot steam;

the controller is also used for controlling the steam generator to be closed according to the steam flow.

In one embodiment, the method further comprises the following steps:

the sensor is arranged at the bottom of the inner container, is connected with the controller and is used for detecting the amount of hot steam in the inner container;

the controller is further configured to control the steam generator to be turned off according to the amount of hot steam.

A method of controlling a dishwasher, the method comprising:

after the steam generator is closed, the circulating fan is controlled to be started to drive hot steam in the inner container to circulate, so that the circulated hot steam is dried through the adsorbent box;

and after the disinfection work is finished, controlling the reduction heater to be started, so that the adsorbent in the adsorbent box is subjected to thermal reduction desorption.

In one embodiment, the method further comprises:

when the disinfection work is carried out, the water inlet electromagnetic valve is controlled to be communicated with the water inlet pipe and the steam generator, so that the water inlet electromagnetic valve is communicated with the water inlet pipe and the steam generator, and the steam generator starts to feed water;

monitoring the water inlet state of the steam generator;

when the water inlet of the steam generator is determined to be finished, the water inlet electromagnetic valve is closed and the steam generator is controlled to be opened, so that the steam generator generates hot steam, the generated hot steam is conveyed to the gas-liquid separator through the first steam inlet pipe and dried, then conveyed to the steam spraying connecting pipe through the second steam pipe, and conveyed to the steam spraying arm through the steam spraying connecting pipe to spray tableware in the steam spraying disinfection inner container.

In one embodiment, the method further comprises:

acquiring the temperature of hot steam detected by a temperature sensor on the steam spray connecting pipe;

when the temperature is determined not to meet the sterilization temperature, starting a steam heater for heating, and returning to the step of acquiring the temperature of the hot steam detected by a temperature sensor on the steam spraying connecting pipe;

and when the temperature is determined to meet the sterilization temperature, controlling the steam electromagnetic valve on the steam spraying connecting pipe to open the steam spraying connecting pipe and the steam spraying arm, so that the hot steam meeting the sterilization temperature is conveyed to the steam spraying arm.

In one embodiment, after the sterilization is completed, the method further includes, before controlling the reduction heater to be turned on to cause the adsorbent in the adsorbent cartridge to undergo thermal reduction desorption:

and when the disinfection work is detected to meet the preset end condition, closing the steam heater and controlling the circulating fan to operate for a fixed time and then closing the steam heater.

In one embodiment, the controlling the reduction heater to be turned on after the sterilization is completed so that the adsorbent in the adsorbent box is subjected to thermal reduction desorption comprises:

after the disinfection work is finished, the reduction heater is started, the pipeline electromagnetic valve is opened, and the circulating electromagnetic valve is closed;

detecting the temperature of the adsorbent in the adsorbent box, and judging whether the reduction is finished according to the temperature of the adsorbent;

when it is determined that the reduction is completed, the reduction heater is closed, the pipe solenoid valve is closed, and the circulation solenoid valve is opened.

In one embodiment, the method further comprises:

acquiring steam flow detected by a flow sensor for hot steam;

and when the steam amount in the inner container meets the disinfection consumption amount according to the steam flow, closing the steam generator.

In one embodiment, the method further comprises:

acquiring the amount of hot steam in the inner container detected by a sensor;

and when the amount of the hot steam in the inner container meets the disinfection dosage, closing the steam generator.

A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of controlling a dishwasher according to any one of the preceding claims.

The dish washing machine comprises a steam generator, a steam spraying arm, a steam spraying connecting pipe for communicating an outlet of the steam generator with an inlet of the steam spraying arm, a circulating fan arranged in a liner, a steam circulating pipe, an air inlet connected with an air outlet of the circulating fan, an adsorbent box communicated with the steam spraying connecting pipe through the steam circulating pipe at the air outlet, and a reduction heater arranged inside the adsorbent box. And after the disinfection is finished, the reduction heater is started, so that the adsorbent in the adsorbent box is thermally reduced, adsorption and reactivation can be carried out for multiple times, and the drying cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a dishwasher in one embodiment;

FIG. 2 is a schematic view showing the construction of a dishwasher in another embodiment;

FIG. 3 is a schematic view showing the construction of a dishwasher in accordance with another embodiment;

FIG. 4 is a schematic view showing the construction of a dishwasher in accordance with another embodiment;

FIG. 5 is a schematic view showing the construction of a dishwasher in accordance with another embodiment;

FIG. 6 is a flow chart illustrating a method of controlling a dishwasher in accordance with one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1, there is provided a dishwasher, a steam generator 11, a tub 16, a steam spray arm 17, a steam spray connection pipe 18, a steam circulation pipe 24, a circulation fan 25, a sorbent box 26, a reducing heater 23, and a controller (not shown).

Wherein the steam generator 11 is used to generate hot steam. The inner container 16 is used for placing tableware, and a steam spray arm 17 is arranged in the inner container 16, for example, the steam spray arm 17 is arranged at the top of the inner container 16 and is used for spraying steam to sterilize the tableware in the inner container 16. The steam spray connecting pipe 18 communicates an outlet of the steam generator 11 with an inlet of the steam spray arm 17 for delivering hot steam to the steam spray arm 17. The circulating fan 25 is arranged in the inner container 16 and used for providing circulating power. The air inlet of the adsorbent box 26 is connected with the air outlet of the circulating fan 25, and the air outlet is communicated with the steam spraying connecting pipe 18 through the steam circulating pipe 24. The reducing heater 23 is provided inside the sorbent cartridge 26. The circulating fan 25 and the reducing heater 23 are connected with the controller. The adsorbent cartridge 26 includes an adsorbent, activated alumina, silica gel, or the like.

Specifically, when the steam generator 11 is controlled to be turned off, the controller controls the circulation fan 25 to be turned on. The circulating fan 25 provides circulating power to circulate the hot steam in the inner container 16 through the steam circulating pipe 24. During the cycle, the hot steam first passes through the sorbent cartridge 26, and the hot steam is dried by the sorbent cartridge 26. Further, after the sterilization is completed, the controller controls the reduction heater 23 to be turned on, so that the adsorbent in the adsorbent box is subjected to thermal reduction desorption. The adsorbent comprises activated alumina, silica gel, etc.

Above-mentioned dish washer, including steam generator, steam sprays the arm, spray the connecting pipe with steam generator's export and the steam of steam spray arm's import intercommunication, the circulating fan of setting in the inner bag, the steam circulating pipe, the air intake is connected with circulating fan's air outlet, the air outlet passes through the adsorbent box that steam circulating pipe and steam spray connecting pipe intercommunication, and locate the inside reduction heater of adsorbent box, and then after closing steam generator, open the hot steam circulation in the drive inner bag by controller control circulating fan, make endless hot steam dry through the adsorbent box, thereby realize disinfecting by dry hot steam, not only can shorten the operating time of dish washer, reduce the power consumption, can also avoid the secondary pollution of tableware. And after the disinfection is finished, the reduction heater is started, so that the adsorbent in the adsorbent box is thermally reduced, adsorption and reactivation can be carried out for multiple times, and the drying cost is reduced.

In one embodiment, as shown in fig. 2, the dishwasher further includes: a water inlet pipe 12, a gas-liquid separator 13, a first steam inlet pipe 14, a second steam inlet pipe 15 and a water inlet electromagnetic valve 19.

Wherein the water inlet pipe 12 communicates a water source outside the dishwasher with an inlet of the steam generator 11 for supplying water to the steam generator 11. The gas-liquid separator 13 serves to dry the hot steam generated by the steam generator 11. The first steam inlet pipe 14 communicates an outlet of the steam generator 11 with a gas inlet of the gas-liquid separator 13, and is used for conveying hot steam generated by the steam generator 11 to the gas-liquid separator 13 for drying. The second steam inlet pipe 15 communicates the gas outlet of the gas-liquid separator 13 with the steam spray connecting pipe 18, and is used for conveying the dried hot steam to the steam spray connecting pipe 18. The water inlet solenoid valve 19 is disposed on the water inlet pipe 12 for controlling the water inlet of the steam generator 11. The controller is connected with the steam generator 11 and the water inlet electromagnetic valve 19, and is used for controlling the water inlet electromagnetic valve 19 to be communicated with the water inlet pipe 12 and the steam generator 11, so that the steam generator 11 starts to feed water, and is also used for controlling the steam generator 11 to be opened after the water inlet of the steam generator 11 is finished.

Specifically, when the dishwasher is washed and enters the sterilization stage, the controller controls the water inlet solenoid valve 19 to be opened to connect the water inlet pipe 12 and the steam generator 11, so that the water inlet pipe 12 delivers the water at the water source to the steam generator 11. Then, when the detection determines that the water injection of the steam generator 11 is completed, the steam generator 11 is controlled to start to operate, and the water is converted into the hot steam. And the generated hot steam is first conveyed to the gas-liquid separator 13 via the first steam inlet pipe 14 for drying. The dried hot steam is conveyed to a steam spray connecting pipe 18 through a second steam inlet pipe 15, and is conveyed to a steam spray arm 17 arranged in the inner container 16 through the steam spray connecting pipe 18. The steam spraying arm 17 sprays the dried hot steam into the inner container 16 to sterilize the dishes in the inner container 16.

In the embodiment, the hot steam is dried through the gas-liquid separator before being conveyed to the inner container, so that the hot steam input into the inner container is dried in advance, and the hot steam input into the inner container can be prevented from bringing excessive water vapor.

In one embodiment, as shown in FIG. 3, the dishwashing wash further comprises: a steam heater 20, a steam electromagnetic valve 21 and a temperature sensor 22.

Wherein, the inlet of the steam heater 20 is connected with the second steam inlet pipe 15 and the steam circulating pipe 24, and the outlet is connected with the steam spraying connecting pipe 18 (not labeled in fig. 3) for heating the hot steam. A steam solenoid valve 21 is provided on the steam shower connection pipe 18 for controlling the delivery of the hot steam. The temperature sensor 22 is disposed on the steam spray connection pipe 18 and is used for detecting the temperature of the hot steam in the steam spray connection pipe 18. The steam heater 20, the temperature sensor 22 and the steam electromagnetic valve 21 are respectively connected with the controller, and the controller controls the steam heater 20 to heat the passing hot steam when the temperature of the hot steam does not meet the sterilization temperature; when the temperature of the hot steam in the steam spray connecting pipe 18 reaches the sterilization temperature, the steam electromagnetic valve 21 is controlled to connect the steam spray connecting pipe 18 and the steam spray arm 17, so that the hot steam is conveyed to the steam spray arm 17.

Specifically, during the start-up of the steam generator 11 to generate steam, the steam solenoid valve 21 may be closed so that the hot steam temporarily stays in the steam shower connection pipe 18 and cannot be delivered to the steam shower arm 17. Meanwhile, when the hot steam reaches the steam spray connection pipe 18, the temperature of the hot steam is detected by the temperature sensor 22, and whether the conveyed hot steam meets the sterilization temperature (110 ℃ to 150 ℃) is judged. When the controller determines that the hot steam does not satisfy the sterilizing temperature according to the temperature fed back from the temperature sensor 22, the controller activates the steam heater 20. Since the supplied hot steam needs to pass through the steam heater 20, it can be heated by the steam heater 20 being activated. Furthermore, when the temperature of the heated hot steam satisfies the sterilization temperature, the steam solenoid valve 21 is controlled to connect the steam spray connection pipe 18 and the steam spray arm 17, so that the hot steam satisfying the sterilization temperature is delivered to the steam spray arm 17. The steam solenoid valve 21 may be directly turned on without additional determination after the steam heater 20 is turned on. When the controller determines that the hot steam meets the sterilization temperature according to the temperature fed back by the temperature sensor 22, the steam heater 20 is not started to heat, and the steam electromagnetic valve 21 is directly controlled to be communicated with the steam spraying connecting pipe 18 and the steam spraying arm 17, so that the hot steam is conveyed to the steam spraying arm 17. It should be understood that the temperature of the hot steam may also be detected in real time by the temperature sensor 22 during the time when the steam solenoid valve 21 has been turned on for hot steam delivery. In the real-time detection process, once the temperature of the hot steam is determined not to satisfy the sterilization temperature, the controller can control the steam heater 20 to heat the subsequently conveyed hot steam in real time so as to ensure that the subsequently conveyed hot steam can satisfy the sterilization temperature.

In the embodiment, the steam heater, the steam electromagnetic valve and the temperature sensor are used for conveying the inner container to be disinfected after the temperature is determined to meet the sterilization temperature, so that the temperature of the conveyed inner container can play a role in sterilization and disinfection, and the phenomenon that the temperature is insufficient and the disinfection effect cannot be achieved is avoided. And after the steam heater is added, the circulating hot steam can be heated to meet the sterilization temperature in the circulating process, so that the effect of recycling is ensured while the energy is saved due to the secondary utilization of the hot steam.

In one embodiment, as shown in fig. 4, the dishwasher further includes: a drain pipe 33, a drain pump 35 and a water storage tank 32. Wherein, the water inlet of the water storage tank 32 is connected with the water outlet of the sorbent box 26, and the water outlet is connected with the drain pipe 33. The drain pump 33 is provided on the drain pipe 35 for pushing the drain.

Specifically, when the reduction heater 23 is turned on so that the adsorbent in the adsorbent cartridge 26 is thermally reduced, the water desorbed by the adsorbent cartridge 26 flows into the water storage tank 32 and is discharged to the outside of the dishwasher through the drain pipe 33.

In one embodiment, referring to fig. 4, the dishwasher further includes: a pipe 27 for communicating the adsorbent cartridge 26 with the outside for discharging the steam generated by the thermal reduction desorption. A pipe solenoid valve 34 provided on the pipe 27 and a circulation solenoid valve 43 provided on the steam circulation pipe 24. Wherein, the pipeline electromagnetic valve 34 is used for controlling the discharge of steam generated by thermal reduction desorption. The circulation solenoid valve 43 is used to prevent steam generated by thermal reduction desorption from flowing back into the inner container 16. The line solenoid valve 34 and the circulation solenoid valve 43 are connected to a controller, and the controller controls the states of the line solenoid valve 34 and the circulation solenoid valve 43.

Specifically, after the sterilization is completed, the controller controls to open the reducing heater 23 for thermal reduction of the adsorbent, and controls to open the pipeline solenoid valve 34 and to close the circulation solenoid valve 43. Then, the temperature of the adsorbent in the adsorbent cartridge 26 is detected, and whether or not the reduction is completed is judged based on the temperature of the adsorbent. When it is determined that the reduction is completed, the controller controls to close the pipe solenoid valve 34 and to open the circulation solenoid valve 43 while controlling to close the reduction heater 23. In this embodiment, the pipeline electromagnetic valve 34 is opened while the reducing heater 23 is opened, so that the steam generated by the thermal reduction can be discharged to the outside of the dishwasher through the pipeline 27, thereby avoiding the potential safety hazard caused by excessive pressure. Meanwhile, the steam generated by the thermal reduction is prevented from flowing back into the inner container 16 through the steam circulation pipe 24 by the closed circulation solenoid valve 43.

In one embodiment, referring to fig. 3, the dishwasher further includes a flow sensor 28 disposed on the steam spray connection pipe 18 (not labeled in fig. 3) and connected to the controller for detecting the steam flow of the hot steam.

Specifically, the flow sensor 28 is disposed on the steam spray connecting pipe 18, and when the hot steam is delivered to the steam spray arm 17 for spray sterilization, the flow sensor 28 detects the steam flow of the hot steam delivered to the inner container 16, and the steam flow can be obtained by integrating the time and the flow. When the controller determines that the hot steam delivered into the inner container 16 is sufficient for sterilization according to the steam flow, the controller controls the steam generator 11 to be turned off, and stops generating the hot steam. Wherein, whether satisfy the disinfection quantity can be confirmed with the flow threshold value comparison of flow and the flow of detection steam of predetermineeing. The flow threshold value may be set according to actual conditions, for example, according to the actual size of the inner container 16. For example, when the controller compares that the steam flow is greater than or equal to the flow threshold value, the controller controls the steam generator 11 to be turned off, and stops generating the hot steam. In this embodiment, the flow sensor detects the flow rate of the steam to be delivered to control and stop the generation of the hot steam, thereby preventing the steam generator 11 from generating steam all the time or generating an insufficient amount of steam.

In another embodiment, referring to FIG. 3, the dishwasher further includes a sensor disposed at the bottom of the tub 16 and connected to the controller for sensing the amount of hot steam in the tub 16. The controller controls the steam generator 11 to be turned off when it is determined that the hot steam is sufficiently used for sterilization based on the amount of the hot steam.

The sensor 29 may be a temperature sensor or a pressure sensor, among others. The temperature sensor detects the temperature of the bottom of the inner container 16. The pressure sensor detects the pressure at the bottom of inner container 16.

In particular, when sensor 29 is a temperature sensor, hot steam, due to its high temperature, generally collects in the upper portion of the cavity of bladder 16. Therefore, when the temperature sensor at the bottom of the cavity of the inner container 16 detects that the bottom temperature meets the preset temperature, for example, when the input is limited when the hot steam meets the sterilization temperature (110 ℃ -150 ℃), the temperature sensor detects that the temperature at the bottom is above 110 ℃, which indicates that the cavity of the inner container 16 is completely filled with steam and is sufficient for sterilization. The controller controls the steam generator 11 to be turned off to stop generating the hot steam. In this embodiment, the temperature sensor detects the bottom temperature to stop the generation of the hot steam, thereby preventing the steam generator 11 from generating steam all the time or generating an insufficient amount of steam.

When the sensor 29 is a pressure sensor, the temperature of the hot steam is generally concentrated at the upper part of the cavity of the inner container 16, and the pressure at the bottom of the inner container 16 changes as the amount of the hot steam increases. Thus, when a pressure sensor disposed at the bottom of bladder 16 detects a pressure threshold, it indicates that the cavity of bladder 16 is completely filled with steam, sufficient for sterilization purposes. The controller controls the steam generator 11 to be turned off to stop generating the hot steam. Wherein the pressure threshold is preferably 0.5 Mpa. That is, when the controller receives the pressure fed back by the pressure sensor as 0.5Mpa, the steam generator 11 is controlled to be turned off. In this embodiment, the pressure sensor detects the bottom pressure to stop the generation of the hot steam, thereby preventing the steam generator 11 from generating steam all the time or generating an insufficient amount of steam.

In one embodiment, the dishwasher may include both the flow sensor 28 and the sensor 29. When a plurality of sensors are included, the detection results of the plurality of sensors each indicate that steam is sufficient for sterilization use and then control the steam generator 11 to be turned off. In this embodiment, the accuracy of detection can be improved by simultaneously detecting a plurality of sensors with different detection dimensions.

In one embodiment, as shown in fig. 5, the dishwasher further includes a water storage tank 31, a drain solenoid valve 30, a washing pump 36, a washing water heater 37, a washing spray inlet pipe 38, a washing upper spray arm 39, a washing lower spray arm 40, an upper basket 41, and a lower basket 42.

Specifically, referring to fig. 5, a water storage tank 31 is provided at the bottom of the inner tub 16, connected to a drain pipe 33, for storing water after washing. The drain solenoid valve 30 is provided on the drain pipe 33 for controlling the drainage. The washing pump 36 and the washing water heater 37 are both disposed on the washing spray water inlet pipe 38, the washing pump 36 is used for providing power to push the washing water, and the washing water heater 37 is used for heating the washing water. The washing spray water inlet pipe 38 communicates the water inlet pipe 12 with the washing upper spray arm 39 and the washing lower spray arm 40, and is used for conveying washing water to the washing upper spray arm 39 and the washing lower spray arm 40. The upper and lower washing spray arms 39 and 40 are used to spray washing water to the dishes placed on the upper and lower baskets 41 and 42 for washing and cleaning. The sprinkler head of the upper wash spray arm 39 faces the upper bowl basket 41 and the sprinkler head of the lower wash spray arm 40 faces the lower bowl basket 42. The water outlet of the gas-liquid separator 13 is connected to a drain pipe 33 for discharging the condensed water generated by the gas-liquid separator 13.

In addition, since the steam generator 11 and the washing shower inlet pipe 38 share one inlet pipe 12 in the present embodiment, the inlet solenoid valve 19 may be an electromagnetic three-way valve, and the inlet direction is controlled by switching different directions through the electromagnetic three-way valve, in order to accurately control the inlet direction.

In one embodiment, as shown in fig. 6, there is provided a control method of a dishwasher, which is described by taking as an example a controller applied to the dishwasher shown in fig. 5, including the steps of:

step S601, controlling the dish washer to wash the dishes according to the washing mode selected by the user.

Step S602, determining whether the remaining time of the washing operation is less than or equal to a preset time, wherein the preset time may be set to 0-10 minutes, and preferably 3 minutes in this embodiment. That is, when it is determined that the washing job remaining time is less than or equal to 3 minutes, it proceeds to step S603. When it is determined that the washing job remaining time is greater than 3 minutes, it returns to step S601.

Step S603, controlling the water inlet solenoid valve 19 (solenoid three-way valve) to switch the water inlet direction, closing the water inlet channel to the washing shower water inlet pipe 38, and opening the water inlet channel to the steam generator 11, so that the steam generator 11 starts to feed water.

Step S604, monitoring and determining whether water is completely fed into the steam generator 11, if so, entering step S605, and if not, returning to step S603.

In step S605, the water inlet solenoid valve 19 is closed to stop water inlet (the solenoid three-way valve is controlled to switch to stop water inlet), the steam solenoid valve 21 is closed, and the steam generator 11 is opened to generate steam, so that the generated hot steam is filled in the first steam pipe 14, the second steam pipe 15 and the steam spray connecting pipe 18, and the hot steam completes drying through the gas-liquid separator 13 during the transportation of the first steam pipe 14, the second steam pipe 15 and the steam spray connecting pipe 18.

Step S606, determining whether the washing operation is completed, returning to step S605 when the washing operation is not completed, and proceeding to step S607 when the washing operation is completed.

In step S607, the line solenoid valve 34 and the drain solenoid valve 30 are closed, so that the inner container 16 forms a closed space.

In step S608, it is determined whether the temperature of the hot steam satisfies the sterilization temperature (110 to 150 ℃) based on the temperature detected by the temperature sensor 22. When not satisfied, the process proceeds to step S609, and when satisfied, the process proceeds to step S610.

In step S609, the steam heater 20 is turned on to heat the hot steam, and the process proceeds to step S610.

Step S610, the steam solenoid valve 21 is opened to connect the steam spray connection pipe 18 and the steam spray arm 17, so that the hot steam meeting the sterilization temperature is delivered to the steam spray arm 17, and then sprayed into the inner container 16 by the steam spray arm 17.

Step S611, it is detected by the sensor whether the amount of steam entering the inner bag 16 is sufficient for sterilization, and when it is determined to be sufficient, the process proceeds to step S612. When it is determined that the steam generation is insufficient, the process proceeds to step S605, where the steam generator 11 is kept turned on, and the hot steam is continuously generated.

Specifically, when the sensor is a flow sensor 28 provided on the steam shower connection pipe 18, the steam flow detected by the flow sensor 28 determines whether the amount of steam entering the inner tub 16 is sufficient for sterilization. When the sensor is a temperature sensor provided at the bottom of the inner container 16, it is determined whether the amount of steam introduced into the inner container 16 is sufficient for sterilization when the temperature sensor detects that the temperature of the bottom is 110 deg.c or more. And when the sensor is a pressure sensor provided at the bottom of the inner container 16, it is determined whether the amount of steam introduced into the inner container 16 is sufficient for sterilization when the pressure sensor detects that the pressure at the bottom is 0.5 Mpa.

Step S612, the steam generator 11 is turned off, and the circulation fan 25 is turned on.

Specifically, the circulating fan 25 provides circulating power to circulate the hot steam in the inner container 16 through the steam circulating pipe 24. At the same time, the circulating hot steam is dried by the sorbent cartridge 26 during the cycle. And further secondarily heating the circulated hot steam by the steam heater 20 connected to the steam circulation pipe 24 and activated, ensuring that the temperature of the hot steam satisfies the sterilization requirements.

In step S613, it is determined whether a predetermined end condition is satisfied, and if so, the process proceeds to step S614. If not, the process returns to step S611.

And step S614, when the sterilization and disinfection meet the preset end condition, closing the steam heater 20 and controlling the circulating fan 25 to operate for a fixed time and then closing. The preset ending condition may be a preset sterilization and disinfection duration, and when the sterilization and disinfection duration satisfies the preset sterilization and disinfection duration, it is determined that the preset ending condition is satisfied. The fixed time is preferably 2 minutes in this embodiment.

In step S615, the reduction heater 23 is turned on to thermally reduce the adsorbent in the adsorbent cartridge 26, and the reduced and desorbed water flows into the water storage tank 32. While opening the line solenoid valve 34 and closing the circulation solenoid valve 43.

In step S616, the temperature of the adsorbent in the adsorbent cartridge 26 is detected to determine whether the reduction is completed. When it is determined that the reduction is completed, the flow proceeds to step S617. When it is determined that the reduction is not completed, return is made to step S615.

In step S617, the reduction heater 23 is closed, the line solenoid valve 34 is closed, and the circulation solenoid valve 43 is opened.

In one embodiment, when the dishwasher includes the flow sensor 28, after step S612, the method further includes: and judging whether the steam flow of the circulated hot steam is less than a flow threshold value. When the steam flow of the circulated hot steam is determined to be less than the flow threshold value, the control starts the steam generator 11 to supplement the steam. The flow threshold may be set according to actual conditions, and 3L/min is preferred in this embodiment. That is, when the steam flow rate of the circulated hot steam is less than 3L/min, the steam generator 11 is turned on to supplement the steam. In this embodiment, through steam replenishment, can ensure that sufficient hot steam disinfects, ensure the disinfection effect.

It should be understood that, although the steps in the flowchart of fig. 6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 6 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

after the disinfection work is finished, the reduction heater is controlled to be started, so that the adsorbent in the adsorbent box is subjected to thermal reduction desorption.

In one embodiment, the computer program when executed by the processor further performs the steps of:

monitoring the water inlet state of the steam generator;

when the water inlet of the steam generator is determined to be finished, the water inlet electromagnetic valve is closed and the steam generator is controlled to be opened, so that the steam generator generates hot steam, the generated hot steam is conveyed to the gas-liquid separator through the first steam inlet pipe and is dried and then conveyed to the spraying connecting pipe through the second steam pipe, and the hot steam is conveyed to the steam spraying arm through the spraying connecting pipe to spray steam to sterilize tableware in the inner container.

In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the temperature of hot steam detected by a temperature sensor on the steam spray connecting pipe; when the temperature is determined not to meet the sterilization temperature, starting a steam heater for heating, and returning to the step of acquiring the temperature of the hot steam detected by a temperature sensor on the steam spraying connecting pipe; and when the temperature is determined to meet the sterilization temperature, controlling the steam electromagnetic valve on the steam spraying connecting pipe to open the steam spraying connecting pipe and the steam spraying arm, so that the hot steam meeting the sterilization temperature is conveyed to the steam spraying arm.

In one embodiment, the computer program when executed by the processor further performs the steps of: and when the disinfection work is detected to meet the preset end condition, closing the steam heater and controlling the circulating fan to operate for a fixed time and then closing the steam heater.

In one embodiment, the computer program when executed by the processor further performs the steps of: after the disinfection work is finished, the reduction heater is started, the pipeline electromagnetic valve is opened, and the circulating electromagnetic valve is closed; detecting the temperature of the adsorbent in the adsorbent box, and judging whether the reduction is finished according to the temperature of the adsorbent; when it is determined that the reduction is completed, the reduction heater is closed, the pipe solenoid valve is closed, and the circulation solenoid valve is opened.

In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring steam flow detected by a flow sensor for hot steam; and when the steam quantity in the inner container meets the disinfection consumption according to the steam flow, closing the steam generator.

In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the amount of hot steam in the inner container detected by a sensor; and when the amount of the hot steam in the inner container meets the disinfection dosage, closing the steam generator.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A dishwasher, comprising:

an inner container;

a steam generator for generating hot steam;

the steam circulating pipe is used for circularly conveying hot steam;

2. The dishwasher of claim 1, further comprising:

a gas-liquid separator for drying the hot steam;

3. The dishwasher of claim 2, further comprising:

4. The dishwasher of claim 1, further comprising:

a drain pipe;

5. The dishwasher of claim 1, further comprising:

6. The dishwasher of claim 1, further comprising:

7. The dishwasher of claim 1, further comprising:

8. A method of controlling a dishwasher, the method comprising:

9. The control method according to claim 8, characterized in that the method further comprises:

monitoring the water inlet state of the steam generator;

10. The method of claim 8, further comprising:

11. The method of claim 8, wherein after the sterilization is completed, controlling the reduction heater to be turned on so that the adsorbent in the adsorbent box is subjected to thermal reduction desorption, and further comprising:

12. The method of claim 8, wherein controlling the reduction heater to be turned on after the sterilization process is completed, so that the adsorbent in the adsorbent box is subjected to thermal reduction desorption comprises:

13. The method of claim 8, further comprising:

acquiring steam flow detected by a flow sensor for hot steam;

14. The method of claim 8, further comprising:

acquiring the amount of hot steam in the inner container detected by a sensor;

15. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 8-14.