WO2020107938A1

WO2020107938A1 - Dishwasher and control method therefor

Info

Publication number: WO2020107938A1
Application number: PCT/CN2019/099429
Authority: WO
Inventors: 汪春节; 封宗瑜; 程晨; 肖德玲; 肖利容; 王堃; 王贤波
Original assignee: 珠海格力电器股份有限公司
Priority date: 2018-11-26
Filing date: 2019-08-06
Publication date: 2020-06-04
Also published as: EP3845113A1; EP3845113A4

Abstract

The present application relates to the technical field of dishwashers, and specifically relates to a dishwasher and a control method therefor. The dishwasher comprises a housing, and further comprises a plasma sterilization and disinfection device. The plasma sterilization and disinfection device comprises a discharge electrode plate, a grounding electrode plate, a radio-frequency power supply and a grounding power supply. The discharge electrode plate and the grounding electrode plate form a dish accommodating space therebetween. The radio-frequency power supply and the discharge electrode plate are connected. The grounding power supply and the grounding electrode plate are connected. Glow plasma covering a large area of dishes are generated by selecting an appropriate power supply and designing a reasonable structure of a discharge electrode so that the dishwasher can use the plasma to perform high-efficiency sterilization and disinfection; therefore, the problem that the sterilization method of existing dishwashers has low efficiency and long processing time is solved, thus reducing sterilization time of the dishwasher and improving sterilization effect of the dishwasher.

Description

Dishwasher and its control method

Related application

This application requires the priority of the Chinese patent application with the application number of 201811419584.0 and the name of "a dishwasher and its control method" if it was applied on November 26, 2018, and the same day, the application number is 201811420522.1 and the name is "A new type of dishwasher and its control method", the entire contents of two patent applications are hereby incorporated by reference.

Technical field

The present application belongs to the technical field of dishwashers, and specifically relates to a dishwasher and its control method.

Background technique

With the improvement of the ability to remove oil stains, dishwashers are more and more recognized by consumers, and the related market is also growing, and there is a trend to replace household disinfection cabinets. This requires dishwashers to be efficient, fast, and broad-spectrum. Sterilization characteristics. At present, dishwashers often use hot water sterilization (70-80 ℃), high temperature and high pressure sterilization, ultraviolet sterilization, ozone sterilization and other methods. The efficiency is not high and can not effectively kill warm bacteria. Therefore, it is necessary to introduce efficient and rapid in dishwashers Environmentally friendly sterilization method.

Commonly used sterilization methods include thermal sterilization, ionizing radiation, plasma sterilization and chemical sterilization. The temperature of the hot water in the dishwasher is below 100°C, which does not reach the temperature required for thermal sterilization. Hot water sterilization cannot effectively remove the bacteria content in the dishwasher. High temperature and high pressure sterilization has poor stability and is difficult to control. The space of the dishwasher is narrow, and the space between the bowls is small, blocking each other, and the ultraviolet rays cannot effectively affect each bowl. If the ozone concentration in the dishwasher is too high, it will oxidize hypochlorous acid, etc. in the tap water, producing substances harmful to human health.

In comparison, plasma sterilization has the following characteristics: (1) It has broad-spectrum antibacterial properties, and it generally takes only a few minutes to reach the sterility assurance level; (2) The plasma gas temperature has the characteristics of close to room temperature, making it It can be used for sterilization of heat-sensitive materials, which is expected to greatly reduce the use of disposable medical materials and reduce medical costs; (3) It can effectively eliminate biological substances with strong resistance, including super bacteria with strong drug resistance, Prion with strong temperature resistance and bacterial biofilm with group protection function, etc.; and can effectively remove odorous gas. This sterilization method is expected to solve the sterilization problem faced by existing dishwashers, but the difficulty of generating plasma in a dishwasher is how to generate a large area of plasma under atmospheric pressure to cover the surface of tableware.

In theory, the generation of plasma is related to the electric field between the electrodes, the electrode spacing, and the initial electron number density. Therefore, a large area of plasma can be generated by designing a reasonable electrode structure.

Summary of the invention

In order to solve the above problem of how the dishwasher generates a large-area plasma under atmospheric pressure, the present application provides a dishwasher and a control method thereof.

In order to achieve the above object, the technical solution adopted in the present application is: a dishwasher, including a housing, and further including a plasma sterilization and disinfection device disposed in the housing, the plasma sterilization and disinfection device includes a discharge electrode plate and a grounding electrode plate 1. A radio frequency power supply and a grounded power supply. A tableware storage space is formed between the discharge electrode plate and the grounded electrode plate. The radio frequency power supply is connected to the discharge electrode plate. The grounded power supply is connected to the grounded electrode plate.

In an embodiment, the plasma sterilization and disinfection device includes a plurality of discharge electrode plates and a plurality of ground electrode plates, and the discharge electrode plates and the ground electrode plates are spaced apart from each other.

In one embodiment, the discharge electrode plate and the ground electrode plate are arranged parallel to each other and perpendicular to the horizontal plane of the housing.

In an embodiment, the distance between the discharge electrode plate and the ground electrode plate is 30-60 mm.

In an embodiment, a plurality of discharge electrode plates and the ground electrode plates are arranged at equal distances.

In one embodiment, the distance between the discharge electrode plate and the ground electrode plate is 50 mm.

In an embodiment, the discharge electrode plate is disposed on the top inside the casing, and the ground electrode plate is disposed on the bottom inside the casing.

In an embodiment, the discharge electrode plate and the ground electrode plate are arranged parallel to each other and parallel to the horizontal plane of the housing.

In an embodiment, the distance between the discharge electrode plate and the ground electrode plate is 150-250 mm.

In one embodiment, the area of the discharge electrode plate is larger than the area of the ground electrode plate.

In an embodiment, an isolation device is provided in the tableware storage space for isolating tableware.

In one embodiment, the discharge voltage of the RF power supply is 1-5 kV.

In one embodiment, the discharge electrode plate and the ground electrode plate are conductive materials.

A method for controlling a dishwasher. The method for controlling the above dishwasher is as follows:

Place the cutlery in the cutlery storage space formed between the discharge electrode plate and the ground electrode plate as an insulating medium;

Sterilize with electricity, apply voltage to the discharge electrode plate connected to the RF power supply, and then form an electric field with the ground electrode plate;

The air on the surface of the insulating medium is ionized to form a plasma, which covers the surface of the tableware for sterilization.

In one embodiment, the dishwasher cleans the dishes before the sterilization is powered on.

In one embodiment, after washing the dishes, the dishwasher heats and evaporates the moisture on the surfaces of the dishes.

The present application provides a dishwasher, including a housing, and a plasma sterilization and disinfection device provided in the housing. The plasma sterilization and disinfection device includes a discharge electrode plate and a grounding electrode plate, a radio frequency power supply, a grounding power supply, and the discharge electrode A tableware storage space is formed between the plate and the ground electrode plate, the radio frequency power supply is connected to the discharge electrode plate, and the ground power supply is connected to the ground electrode plate to realize a large area coverage through a reasonable design of the discharge electrode structure The glow plasma of the tableware uses the plasma to efficiently sterilize the tableware, which solves the problems of the low efficiency and long processing time of the existing dishwasher sterilization methods, thereby reducing the sterilization time of the dishwasher and improving The sterilization effect of the dishwasher.

BRIEF DESCRIPTION

1 is a schematic structural view of an embodiment of a dishwasher;

2 is a schematic structural diagram of a dishwasher according to another embodiment;

Fig. 3 is a flowchart of a control method of the dishwasher.

detailed description

The technical solutions in the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments.

As shown in FIG. 1, an embodiment of the present application provides a dishwasher including a housing 100 and a plasma sterilization and disinfection device provided in the housing 100. The plasma sterilization and disinfection device includes a plurality of

discharge electrode plates

101 and 103 , A plurality of

ground electrode plates

102, 104, radio frequency power supply 105 and ground power supply 106. The materials of the

discharge electrode plates

101 and 103 and the

ground electrode plates

102 and 104 are conductive materials. The discharge electrode plates and the ground electrode plates are spaced apart from each other, that is, a ground electrode plate 102 is provided between the two

discharge electrode plates

101, 103, and a discharge electrode plate 103 is provided between the two

ground electrode plates

102, 104, and The

discharge electrode plates

101, 103 and the

ground electrode plates

102, 104 are arranged parallel to each other and perpendicular to the horizontal plane of the housing 100, and the

discharge electrode plates

101, 103 are arranged at equal distances from the

ground electrode plates

102, 104. The distance between any one of the

discharge electrode plates

101 and 103 and any adjacent one of the

ground electrode plates

102 and 104 is 50 mm, which is convenient for placing tableware for sterilization and disinfection. The

discharge electrode plates

101, 103 and the

ground electrode plates

102, 104 form a tableware storage space to ensure that the tableware is not superimposed, so that the generated glow plasma can cover the surface of the tableware, and the sterilization and disinfection effect is more effective.

The radio frequency power supply 105 is connected to the

discharge electrode plates

101 and 103, and the ground power supply 106 is connected to the

ground electrode plates

102 and 104. The discharge voltage value of the radio frequency power supply 105 is 1-5 kV. By selecting an appropriate voltage and designing a reasonable discharge structure, the sterilization effect of the dishwasher is more efficient.

In this embodiment, by designing spaced metal electrodes, that is, multiple

discharge electrode plates

101, 103 and multiple ground electrode plates 102, the original bowl and basket spacing in the dishwasher is replaced, so that the tableware is placed between the two metal electrodes During operation, two adjacent electrodes are connected to radio frequency high voltage and ground respectively, and the tableware to be treated is used as an insulating medium to successfully generate a large-area glow plasma under atmospheric pressure. The module is installed in the dishwasher, so that a large area of glow discharge plasma is generated on the surface of the tableware inside, and the tableware is disinfected and sterilized. The plasma sterilization speed is fast, the effect is strong, and the range is wide. Secondary pollution. Due to ionized air, there will be no consumables consumption, long-term operation, and low power consumption.

As shown in FIG. 2, another embodiment of the present application provides a dishwasher including a housing 100 and a plasma sterilization and disinfection device provided in the housing 100. The plasma sterilization and disinfection device includes a discharge electrode plate 101 and a ground electrode The board 104, the radio frequency power supply 105 and the ground power supply 106. The discharge electrode plate 101 is disposed at the top inside the casing 100, and the ground electrode plate 104 is disposed at the bottom inside the casing 100. The materials of the discharge electrode plate 101 and the ground electrode plate 104 are conductive materials. The discharge electrode plate 101 and the ground electrode plate 104 are parallel to each other and parallel to the horizontal plane of the housing 100. The distance between the discharge electrode plate 101 and the ground electrode plate 104 is 200mm, and the area of the discharge electrode plate 101 is larger than the area of the ground electrode plate 104, so that a large area of glow plasma can be generated in the dishwasher, which has a sterilizing effect on tableware More effective.

A cutlery storage space is formed between the discharge electrode plate 101 and the ground electrode plate 104, and an isolation device 107 is provided in the cutlery storage space for isolating cutlery to make the cutlery sterilization effect more thorough. The radio frequency power supply 105 is connected to the discharge electrode plate 101, the discharge voltage value of the radio frequency power supply is 1-5kV, and the grounding power supply 106 is connected to the ground electrode plate 104. By selecting a suitable voltage and designing a reasonable discharge structure, the dishes are washed The machine sterilization effect is more efficient.

In this embodiment, by designing two plate electrodes facing each other, that is, the discharge electrode plate 101 and the ground electrode plate 104, and using the tableware to be treated as an insulating medium, a large-area glow plasma is successfully generated under atmospheric pressure. The module is installed in the dishwasher, so that a large area of glow discharge plasma is generated on the surface of the dishes inside the dishwasher, and the dishes are disinfected and sterilized. Plasma sterilization speed is fast, the effect is strong, the scope is wide, and no secondary pollution will occur after treatment. Due to ionized air, there will be no consumables consumption, long-term operation, low power consumption.

As shown in FIG. 3, an embodiment of the present application further provides a dishwasher control method. To control the dishwasher of any of the above embodiments, the method is as follows:

S1: Place the cutlery in the cutlery storage space formed between the discharge electrode plate and the ground electrode plate as an insulating medium;

S2: power-on sterilization, applying a voltage to the discharge electrode plate connected to the radio frequency power supply, and then forming an electric field with the ground electrode plate;

S3: ionize the air on the surface of the insulating medium to form a plasma, and cover the surface of the tableware for sterilization.

Before power-on sterilization, the dishwasher can wash the dishes. After washing, the dishwasher can be heated at high temperature to evaporate the water on the surface of the tableware. In steps S2 and S3, a voltage is applied to the discharge electrode plate by a radio frequency power supply to form a large-area high-voltage area between the discharge electrode plate and the ground electrode plate, and the cutlery between the discharge electrode plate and the ground electrode plate is used as an insulating medium The ionized air formed between the discharge electrode plate and the ground electrode plate ionizes the air on the surface of the tableware to form a glow plasma, and covers the surface of the insulating medium tableware, thereby killing bacteria and viruses therein, and achieving the purpose of sterilizing and disinfecting the tableware .

The above is only the preferred specific implementation manner of the present application, but the design concept of the present application is not limited to this, and any non-substantial changes to the application using this concept should be an act that violates the protection scope of the present application.

Claims

A dishwasher, including a housing, characterized in that it also includes a plasma sterilization and disinfection device provided in the housing, the plasma sterilization and disinfection device includes a discharge electrode plate, a grounding electrode plate, a radio frequency power supply, and a grounding power supply A tableware storage space is formed between the electrode plate and the ground electrode plate, the radio frequency power supply is connected to the discharge electrode plate, and the ground power supply is connected to the ground electrode plate.
The dishwasher according to claim 1, wherein the plasma sterilization and disinfection device includes a plurality of the discharge electrode plates and a plurality of the ground electrode plates, the discharge electrode plates and the ground electrode plates are mutually Arranged at intervals.
The dishwasher according to claim 2, wherein the discharge electrode plate and the ground electrode plate are arranged parallel to each other and perpendicular to the horizontal plane of the housing. 4. The dishwasher according to claim 2, wherein the distance between the discharge electrode plate and the ground electrode plate is 30-60 mm.
The dishwasher according to any one of claims 2 to 4, wherein the plurality of discharge electrode plates and the plurality of ground electrode plates are arranged at equal distances.
The dishwasher according to claim 5, wherein the distance between the discharge electrode plate and the ground electrode plate is 50 mm.
The new dishwasher according to claim 1, wherein the discharge electrode plate is disposed at the top of the housing, and the ground electrode plate is disposed at the bottom of the housing.
The new dishwasher according to claim 7, wherein the discharge electrode plate and the ground electrode plate are arranged parallel to each other and parallel to the horizontal plane of the housing.
The new dishwasher according to claim 7 or 8, wherein the distance between the discharge electrode plate and the ground electrode plate is 150-250 mm.
The new dishwasher according to claim 7, wherein the area of the discharge electrode plate is larger than the area of the ground electrode plate.
The new dishwasher according to claim 7, wherein an isolation device is provided in the tableware storage space for isolating tableware.
The dishwasher according to claim 1, wherein the discharge voltage of the radio frequency power source is 1-5kV.
The dishwasher according to claim 1, wherein the materials of the discharge electrode plate and the ground electrode plate are conductive materials.
A control method of a dishwasher, characterized in that: controlling the dishwasher of any one of claims 1-13, comprising the following steps:

Place the cutlery in the cutlery storage space formed between the discharge electrode plate and the ground electrode plate as an insulating medium;

Sterilize with electricity, apply voltage to the discharge electrode plate connected to the RF power supply, and then form an electric field with the ground electrode plate;

The air on the surface of the insulating medium is ionized to form a plasma, which covers the surface of the tableware for sterilization.
The control method of the dishwasher according to claim 14, wherein the dishwasher cleans the dishes before the sterilization by power-on.
The control method of the dishwasher according to claim 15, wherein the dishwasher heats and evaporates moisture on the surface of the dishes after washing the dishes.