CN105686777A - Supercritical carbon dioxide dish washing machine - Google Patents

Abstract

The invention discloses a supercritical carbon dioxide dish washing machine which comprises a cleaning kettle and a separating kettle located on the lower portion of the cleaning kettle. The cleaning kettle comprises a cleaning seal chamber which is composed of a shell and a seal door arranged on the shell, a constant temperature device is arranged on the shell, a bowl basket tray and a cleaning device are arranged in the cleaning seal chamber, and the cleaning device comprises a sprayer and an ultrasonic transducer; the sprayer and the ultrasonic transducer are both aligned to tableware contained in a bowl basket supported by the bowl basket tray, and a pipeline connecting port of the spraying device is located outside the shell; the separating kettle comprises a sealing bin, the upper portion of the seal bin is provided with a seal bin water inlet, a gaseous carbon dioxide outlet and an exhaust valve, the bottom of the seal bin is provided with a blowdown valve, and the bottom of the cleaning seal chamber is communicated with the upper portion of the seal bin through a back pressure valve. The supercritical carbon dioxide dish washing machine has the advantages of being high in cleaning cleanliness, green, environmentally friendly and the like.

Description

A supercritical carbon dioxide dishwasher

technical field

The invention relates to a supercritical carbon dioxide dishwasher.

Background technique

At present, the dishwashers used in our daily life are all washed with water, which has the following disadvantages: high water consumption, and the water consumption of a single use of the dishwasher is more than 10L. Today, when water resources are extremely precious, dishwashers are used as The products that are often used in household appliances undoubtedly consume a lot of water resources; to cause environmental pollution, in order to enhance the cleaning effect, traditional dishwashers will add appropriate amount of "dishwashing powder", "rinse agent", "softening salt" and so on during the cleaning process. additive. During the cleaning process, these chemical substances will be discharged into the natural environment together with the dishwashing wastewater, causing pollution to the environment; at the same time, because trace amounts of chemical substances remain on the tableware, they will have a certain impact on human health.

When the temperature of carbon dioxide is higher than the critical temperature Tc=31.26°C and the pressure is higher than the critical pressure Pc=72.9atm, the properties of carbon dioxide will change. Its density is close to that of liquid, its viscosity is close to that of gas, and its diffusion coefficient is 100 times that of liquid. It has amazing dissolving power and has wide application prospects. Supercritical carbon dioxide is one of the most widely studied fluids at present. It has the following characteristics: the critical temperature of CO2 is 31.26°C, the critical pressure is 72.9atm, and the critical conditions are easy to achieve; the chemical properties of CO2 are inactive, colorless, odorless and non-toxic. Good safety; cheap price, high purity, easy to obtain. Therefore, supercritical carbon dioxide is a good cleaning medium, and supercritical carbon dioxide dishwashers can clean tableware in an efficient, green and environmentally friendly manner.

Contents of the invention

The technical problem to be solved by the present invention is to provide a supercritical carbon dioxide dishwasher, which has the characteristics of high cleanliness, greenness, and environmental protection.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A supercritical carbon dioxide dishwasher includes a cleaning kettle and a separation kettle located at its lower part. The cleaning kettle includes a cleaning and sealing chamber composed of a shell and a sealing door arranged on the shell, and a constant temperature device is arranged on the shell. A basket tray and a cleaning device are arranged in the cleaning sealed room, and the cleaning device includes a shower and an ultrasonic transducer; the shower and the ultrasonic transducer are aimed at the tableware in the basket lifted by the basket tray, spray The pipeline connection port of the shower device is located outside the shell; the separation kettle includes a sealed chamber, the upper part of the sealed chamber is provided with a water inlet of the sealed chamber, a gaseous carbon dioxide outlet and an exhaust valve, and the bottom of the sealed chamber is provided with a drain valve to clean the sealed chamber. The bottom of the tank communicates with the upper part of the sealed chamber through the back pressure valve.

The present invention is further improved in that:

The position of the bowl basket tray can make the tableware in the bowl basket lifted by the bowl basket tray be in the middle of the space of the cleaning and sealing room; there are two showers in the washing and sealing room, which are respectively symmetrically arranged on the upper and lower sides of the bowl basket tray.

The cleaning and sealing chamber is in the shape of a horizontal tank, and the sealing door is located at the end of the cleaning and sealing chamber.

The constant temperature device on the shell is as follows: the shell is equipped with a jacket layer for circulating heat preservation water, the upper part of the jacket layer is provided with a jacket layer water inlet, and the lower part of the jacket layer is provided with a jacket layer water outlet .

The water outlet of the jacket layer at the lower part of the jacket layer arranged on the shell of the cleaning kettle communicates with the water inlet of the seal chamber at the upper part of the seal chamber of the separation kettle through a valve.

The sealed chamber of the separation kettle is composed of a cylindrical body at the upper end and a conical body at the lower end.

The beneficial effects produced by adopting the above-mentioned technical scheme are:

The invention includes a cleaning kettle which includes a cleaning and sealing room composed of a casing and a sealing door arranged on the casing, a constant temperature device is arranged on the casing to form a space for the existence of supercritical carbon dioxide; a bowl basket tray is arranged in the cleaning and sealing room And the cleaning device, the cleaning device includes a shower and an ultrasonic transducer; the shower and the ultrasonic transducer are all aimed at the tableware in the bowl basket lifted by the bowl basket tray, and the tableware is sprayed by supercritical carbon dioxide And the ultrasonic waves emitted by the ultrasonic transducer, when the bubbles generated in the liquid critical carbon dioxide on the surface of the tableware are closed, shock waves are generated to enhance the cleaning effect; the pipeline connection port of the spray device is located outside the shell, which is convenient for circulation with supercritical carbon dioxide System connection; the separation kettle includes a sealed chamber, and the bottom of the cleaning and sealing chamber communicates with the upper part of the sealing chamber through a back pressure valve, so that the pressure of the sealing chamber is lower than a certain pressure of the cleaning and sealing chamber, so that the carbon dioxide with the cleaning dirt undergoes a phase change. The inside of the sealed chamber becomes gaseous to separate the dirt. The bottom of the sealed chamber is equipped with a sewage valve for external discharge of sewage; the upper part of the sealed chamber is equipped with a water inlet of the sealed chamber, a gaseous carbon dioxide outlet and an exhaust valve for flushing. The sealed chamber is connected to the supercritical carbon dioxide circulation system for recycling, and the cleaning kettle and the separation kettle are depressurized; thereby completing the cleaning of the tableware, the separation of dirt and the recycling of carbon dioxide in the supercritical carbon dioxide circulation system; it has the function of cleaning and cleaning High density, water saving, green, environmental protection and other characteristics, can be widely used in households, restaurants, hotels and other catering industries.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

In the attached drawings: 1. Shell; 2. Sealed door; 3. Basket tray; 4. Sprayer; 4-1. Pipeline connection port; 5. Ultrasonic transducer; 6. Basket; 7. Sealed chamber; 7-1, cylindrical body; 7-2, conical body; 8, water inlet of sealed chamber; 9, exhaust valve; 10, sewage valve; 11, back pressure valve; 12, jacket layer; 13, folder Jacket layer water inlet; 14. Jacket layer water outlet.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

From the embodiment shown in Figure 1, it can be known that the present embodiment includes a cleaning tank and a separation tank positioned at its lower part, and the cleaning tank includes a cleaning and sealing chamber made up of a housing 1 and a sealing door 2 arranged on the housing 1. The body 1 is provided with a constant temperature device, and a bowl basket tray 3 and a cleaning device are provided in the cleaning sealed room, and the cleaning device includes a shower 4 and an ultrasonic transducer 5; the shower 4 and the ultrasonic transducer 5 are all aligned with the bowl The tableware in the bowl basket 6 lifted by the basket tray 3, the pipeline connection port 4-1 of the spray device is located outside the housing 1; the separation kettle includes a sealed chamber 7, and the upper part of the sealed chamber 7 is provided with a sealed chamber water inlet 8. A gaseous carbon dioxide outlet 15 and an exhaust valve 9. The bottom of the sealed chamber 7 is provided with a blowdown valve 10, and the bottom of the cleaned sealed chamber communicates with the top of the sealed chamber 7 through a back pressure valve 11.

The position of the bowl basket tray 3 can make the tableware in the bowl basket 6 lifted by the bowl basket tray 3 be in the middle of the space of the cleaning and sealing room; there are two showers 4 in the cleaning and sealing room, which are respectively symmetrically arranged on the bowl basket tray 3 the upper and lower sides.

The cleaning and sealing chamber is a horizontal tank-shaped structure, and the sealing door 2 is located at the end of the cleaning and sealing chamber.

The constant temperature device provided on the housing 1 is as follows: the housing 1 is provided with a jacket layer 12 for circulating heat preservation water, a jacket layer water inlet 13 is provided on the top of the jacket layer 12, and a jacket layer water inlet 13 is provided on the bottom of the jacket layer 12. Jacket layer water outlet 14 is arranged.

The jacket layer water outlet 14 at the lower part of the jacket layer 12 arranged on the shell 1 of the cleaning kettle communicates with the seal chamber water inlet 8 at the top of the seal chamber 7 of the separation kettle through a valve.

The airtight chamber 7 of separating kettle is combined by the cylindrical body 7-1 of upper end and the cone-shaped body 7-2 of its lower end.

working principle:

Connect the pipeline connection port 4-1 and the gaseous carbon dioxide outlet 15 of the spray device of the device to the corresponding connection port of the supercritical carbon dioxide circulation system, place the bowl basket with tableware on the bowl basket tray, close the airtight door, To start the supercritical carbon dioxide circulation system, since the supercritical carbon dioxide should be controlled at a temperature above 32°C, it is necessary to circulate the circulating water of the corresponding temperature through the jacket layer 12 through the jacket layer water inlet 13 and the jacket layer water outlet 14 to maintain cleaning The temperature of the sealed chamber, the sprayer 4 and the ultrasonic transducer 5 are turned on, and the high-frequency oscillation signal sent by the ultrasonic generator is converted into a high-frequency mechanical oscillation by the ultrasonic transducer 5 and propagated into the medium-cleaning solvent, Ultrasonic waves radiate forward in the cleaning liquid, causing the liquid to flow and generate tens of thousands of tiny bubbles with a diameter of 50-500 μm. The tiny bubbles in the liquid vibrate under the action of the sound field. These bubbles form and grow in the negative pressure zone where the ultrasonic wave travels longitudinally, while in the positive pressure zone, when the sound pressure reaches a certain value, the bubbles increase rapidly and then close suddenly. And when the bubble closes, a shock wave is generated, and thousands of atmospheric pressures are generated around it, destroying the insoluble dirt and making them disperse in the supercritical carbon dioxide cleaning liquid. When the group particles are wrapped in oil and adhere to the surface of the cleaning piece, the oil is emulsification, solid particles and detachment, so as to achieve the purpose of cleaning and purification. After cleaning, the supercritical carbon dioxide with dirt is depressurized by the back pressure valve 11 and undergoes phase transformation into gaseous carbon dioxide and enters the sealed chamber 7, while the dirt is still solid. The liquid mixture falls into the bottom of the separation tank and can be discharged through the drain valve 10. After the cleaning process is over, the exhaust valve 9 is opened to release the pressure on the separation kettle and the cleaning kettle. After the pressure relief is completed, the valve can be opened to allow the water in the jacket layer 12 to flow into the separation kettle through the jacket layer water outlet 14 for flushing, and the gaseous carbon dioxide in the separation kettle is circulated in the supercritical carbon dioxide circulation system through the gaseous carbon dioxide outlet 15 , so as to ensure the continuity of equipment work.

Claims (6)

1. A supercritical carbon dioxide dishwasher, characterized in that: it includes a cleaning kettle and a separation kettle located at its lower part, and the cleaning kettle includes a casing (1) and a sealed door ( 2) A cleaning and sealing room consisting of a constant temperature device on the housing (1), a bowl basket tray (3) and a cleaning device in the cleaning and sealing room, and the cleaning device includes a sprayer (4 ) and the ultrasonic transducer (5); the sprayer (4) and the ultrasonic transducer (5) are aimed at the tableware in the bowl basket (6) held by the basket tray (3), and the The pipeline connection port (4-1) of the spraying device is located outside the casing (1); the separation kettle includes a sealed chamber (7), and the upper part of the sealed chamber (7) is provided with a water inlet of the sealed chamber (8), gaseous carbon dioxide outlet (15) and exhaust valve (9), the bottom of the sealed chamber (7) is provided with a blowdown valve (10), and the bottom of the cleaned sealed chamber is connected with the back pressure valve (11) The upper part of the sealed chamber (7) is connected. 2. A supercritical carbon dioxide dishwasher according to claim 1, characterized in that: the basket tray (3) is located so that the basket (6) lifted by the basket tray (3) The tableware inside is in the middle of the space of the cleaning and sealing room; there are two showers (4) in the cleaning and sealing room, which are symmetrically arranged on the upper and lower sides of the bowl basket tray (3). 3. A supercritical carbon dioxide dishwasher according to claim 1, characterized in that: the cleaning and sealing chamber is in the shape of a lying tank, and the sealing door (2) is located at the end of the cleaning and sealing chamber. 4. A supercritical carbon dioxide dishwasher according to claim 1, characterized in that: the constant temperature device provided on the housing (1) is: the housing (1) is provided with a heat preservation water Jacket layer (12), the upper part of the jacket layer (12) is provided with a jacket layer water inlet (13), and the lower part of the jacket layer (12) is provided with a jacket layer water outlet (14 ). 5. A supercritical carbon dioxide dishwasher according to claim 4, characterized in that: the jacket layer jacket layer at the lower part of the jacket layer (12) on the shell (1) of the cleaning kettle The water outlet (14) communicates with the water inlet (8) of the sealed chamber on the upper part of the sealed chamber (7) of the separation kettle through a valve. 6. A supercritical carbon dioxide dishwasher according to claim 5, characterized in that: the sealed chamber (7) of the separation tank consists of a cylindrical body (7-1) at the upper end and a conical body (7-1) at the lower end -2) combined.