Hot air circulating system and energy-saving dish washing machine

Abstract

The utility model belongs to the technical field of dish-washing machines, and particularly relates to a hot air circulating system and an energy-saving dish-washing machine. The hot air circulating system comprises a main water tank, a hot air inlet and a hot air outlet which are formed in the main water tank, a small heat extraction fan connected with the hot air outlet through a pipeline, a hot air exchange box communicated with the small heat extraction fan through a pipeline, an air blower connected with the hot air exchange box through a pipeline, and a hot air inlet pipeline communicated with the hot air inlet; the blower communicates with the hot air inlet pipeline; an air inlet hole with a downward opening is formed in the bottom of the hot air exchange box. Hot air is blown into the hot air inlet through the air blower, the small heat extraction fan extracts the hot air from the hot air outlet, flowing of the hot air is accelerated, water vapor in the water tank is extracted, the water vapor drips out from the air inlet with the downward opening in the bottom of the hot air exchange box after being pre-cooled and condensed, and safe use of the air blower is effectively protected; the drying speed is increased through the hot air circulating system, and the safety of electric appliances is effectively protected through the design of the air inlet with the opening facing downwards.

Description

Technical Field

[0001] The utility model belongs to the technical field of dishwashers, and particularly relates to a hot air circulation system and an energy-saving dishwasher. Background Art

[0002] The drying process of a traditional dishwasher uses electrically heated air to blow towards the dishes for drying. Excess heat and water vapor are discharged through the overflow vents. The heat is not well utilized, and the water vapor evaporates slowly, resulting in a slow drying speed. In addition, since the heat is not utilized to the maximum extent, it is more energy-consuming. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art in that the drying process consumes too much electricity and has a slow drying speed, and to provide a hot air circulation system that has a fast drying speed and effectively utilizes heat.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A hot air circulation system, characterized in that it includes: a main water tank, a hot air inlet and a hot air outlet arranged on the main water tank, a small heat extraction fan connected to the hot air outlet pipe, a hot air exchange box connected to the small heat extraction fan pipe, a blower connected to the hot air exchange box pipe and a hot air inlet pipe connected to the hot air inlet; the blower is connected to the hot air inlet pipe; the bottom of the hot air exchange box has an air inlet hole opening downward.

[0006] Furthermore, it also includes a drying and heating module connected to the blower pipeline, the drying and heating module includes an air cavity and a heater arranged in the air cavity, the blower blows air into the air cavity, and the heater heats the air.

[0007] Furthermore, an anti-backflow air duct is provided between the hot air inlet duct and the drying and heating module; the anti-backflow air duct is an arched duct, and the top of the arched duct is higher than the top of the main water tank.

[0008] Furthermore, an air nozzle for blowing air toward the inside of the water tank is provided on the hot air inlet duct below the hot air inlet, and an air duct solenoid valve is provided on the hot air inlet duct between the air nozzle and the hot air inlet.

[0009] The utility model also discloses an energy-saving dishwasher, which is characterized by comprising the above-mentioned hot air circulation system.

[0010] Furthermore, an overflow port is provided above the main water tank, and the main water tank is connected to the overflow port through an overflow pipe.

[0011] The beneficial effects of the hot air circulation system and energy-saving dishwasher of the utility model are:

[0012] 1. Hot air is blown into the hot air inlet through the blower, and the heat extraction fan extracts it from the hot air outlet, which speeds up the flow of hot air and extracts the water vapor in the water tank at the same time. The water vapor is pre-cooled and condensed and then drips out from the downward-opening air inlet at the bottom of the hot air exchange box, effectively protecting the safe use of the blower. The utility model speeds up the drying speed through the hot air circulation system and effectively protects the safety of the appliance through the downward-opening air inlet design.

[0013] 2. The windproof backflow duct of the arched pipe with the top higher than the top of the main water tank can effectively prevent the water entering from the air nozzle from flowing back into the drying heating module and blower, effectively protecting the safety of the appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 This is a schematic front view of an energy-saving dishwasher according to an embodiment of the present utility model;

[0016] Figure 2 1 is a schematic top view of an energy-saving dishwasher according to an embodiment of the present utility model;

[0017] Figure 3 This is an overall structural diagram of the rotary spray disc of an embodiment of the present utility model;

[0018] Figure 4 This is a diagram showing the internal structure of the cylindrical cavity of the rotary spray disk according to an embodiment of the present utility model;

[0019] Figure 5 This is a diagram showing the internal structure of the arc-shaped cavity of the rotary spray disk according to an embodiment of the present utility model;

[0020] Figure 6 It is a cross-sectional view of the rotary spray disc using the new embodiment.

[0021] In the figure: 1, main water tank, 2, upper spray arm, 21, spray head, 3, rotating spray disk, 31, cylindrical cavity, 32, arc cavity, 33, spiral channel, 34, first water spray hole, 35, second water spray hole, 4, hot air inlet, 5, hot air outlet, 6, ultrasonic generator, 7, drying and heating module, 71, heater, 72, air cavity, 8, small heat extraction fan, 9, hot air exchange box, 91, air inlet, 10, blower, 11, small water tank, 1 2. Water inlet pipe, 13. Hot air inlet duct, 14. Anti-backflow air duct, 15. Air nozzle, 16. Bottom air duct, 17. Air duct solenoid valve, 18. Low water level switch, 19. High water level switch, 20. Drain main pipe, 21. Oil overflow pipe, 22. Waste collection tank, 23. Control cabinet, 24. Sliding cover, 25. Overflow duct, 26. Overflow port, 27. Sink heating pipe, 28. Automatic drain ball valve, 29. Water inlet solenoid valve, 30. Partition screen. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0023] like Figures 1-6 The specific embodiment of the energy-saving dishwasher of the present invention shown in the figure includes: a main water tank 1, an upper spray arm 2 arranged above the main water tank 1, a plurality of rotating spray disks 3 arranged at the lower part of the main water tank 1, a hot air inlet 4 and a hot air outlet 5 arranged at the upper part of the main water tank 1, a hot air circulation system connecting the hot air inlet 4 and the hot air outlet 5, an ultrasonic generator 6 arranged in the main water tank 1, and a small water tank 11 arranged on the side of the main water tank 1.

[0024] The hot air circulation system includes a heat extraction fan 8 connected to the hot air outlet 5, a hot air exchange box 9 connected to the heat extraction fan 8, a blower 10 connected to the hot air exchange box 9, a drying and heating module 7 connected to the blower 10, a hot air inlet duct 13 connected to the hot air inlet 4, and a backflow prevention duct 14 connected between the hot air inlet duct 13 and the drying and heating module 7. The backflow prevention duct 14 is an arched duct with its top higher than the top of the main water tank 1. The hot air inlet duct 13 below the hot air inlet 4 has an air nozzle 15 that blows air toward the inside of the water tank. A duct solenoid valve 17 is installed on the hot air inlet duct 13 between the air nozzle 15 and the hot air inlet 4. A bottom air duct 16 is provided on the bottom surface of the main water tank 1, connected to the hot air inlet duct 13 and also equipped with multiple air nozzles 15 that blow air upward.

[0025] The bottom of the hot air exchange box 9 has an air inlet 91 opening downward.

[0026] During the cleaning phase, the air duct solenoid valve 17 is closed, the drying and heating module 7 does not start heating, and the blower 10 continues to operate to extract air. The gas is ejected from the air nozzle 15 into the cleaning water in the main water tank 1, and the bubbling principle is used to speed up the cleaning process. When the cleaning is completed, the blower 10 stops running. At this time, the water in the main water tank 1 will flow back into the hot air inlet duct 13 through the air nozzle 15. There is a risk that the water will flow back from the hot air inlet duct 13 into the blower 10 and the drying and heating module 7, affecting the safety and service life of the blower 10 and the drying and heating module 7. The present invention provides an arched anti-backflow air duct 14 between the hot air inlet duct 13 and the blower 10. As long as the top of the anti-backflow air duct 14 is above the water surface, water will not flow back into the blower 10.

[0027] The drying and heating module 7 includes an air cavity 72 and a heater 71 disposed in the air cavity 72 . The blower 10 blows air into the air cavity 72 , and the heater 71 heats the air.

[0028] See also Figure 3-Figure 6 The rotating spray disc 3 of the present invention is mounted to the water inlet pipe 12 via a bearing. The rotating spray disc 3 includes a cylindrical cavity 31 and an arcuate cavity 32 disposed above the cylindrical cavity 31. The lower end of the cylindrical cavity 31 is sleeved over the outer ring of the bearing. The water inlet pipe 12 is mounted in conjunction with the inner ring of the bearing. A spiral channel 33 is formed at the top of the cylindrical cavity 31, connecting to the arcuate cavity 32. A first water spray hole 34, opening obliquely upward, is formed within the spiral channel 33. Preferably, the central axis of the first water spray hole 34 forms an angle of 30°-45° with the central axis of the cylindrical cavity 31. A plurality of upward-facing second water spray holes 35 are disposed in the cylindrical cavity 31. Preferably, the central axis of the second water spray hole 35 forms an angle of 15°-45° with the central axis of the cylindrical cavity 31.

[0029] Since tap water itself has a certain water pressure, after the water inlet pipe 12 enters the spiral channel 33 of the rotating spray disc 3, the spiral spray disc 3 automatically rotates due to the pressure of the incoming water impacting the spiral channel 33. During the automatic rotation, water is sprayed out from the first water spray hole 34 and the second water spray hole 35 to rinse the tableware.

[0030] In order to ensure that the rotating spray disc 3 sprays water upward with greater spray force on the tableware, the water flow is pressurized by a booster pump before the water inlet pipe 12 enters the rotating spray disc 3.

[0031] The upper spray arm 2 of the present invention comprises a spray rod with multiple spray heads 21 arranged in different orientations. The spray rod is connected to the water inlet pipe 12 via a bearing. Due to the specific orientations of the spray heads 21, the upper spray arm 2 can rotate around the water inlet pipe 12 under the action of tap water pressure. This type of rotatable upper spray arm 2 is relatively common in the art and will not be described in detail here.

[0032] To enhance the rinsing of tableware by spraying water upward from below, the present invention incorporates a rotating spray disc 3. This is because the bottom of the main sink 1 can often hold long items like chopsticks and spoons. Conventional rotating spray arms often jam the spray arm, but the present invention addresses this problem with a disc-shaped rotating spray disc 3. The top of the rotating spray disc 3 is curved or semicircular, and the diameters of the first and second spray holes 34 and 35 are small, preventing chopsticks from becoming lodged. Furthermore, the rotating disc's small rotational volume prevents interference with the tableware at the bottom of the main sink 1.

[0033] The main water tank 1 is equipped with a low water level switch 18 and a high water level switch 19. A water tank heating pipe 27 is also installed in the tank. A main drain pipe 20 is located below the main water tank 1. This main drain pipe 20 is connected to the main water tank 1 via an automatic drain ball valve 28. The drain pipe of the small water tank 11 is also connected to the main drain pipe 20. An oil overflow pipe 21 is also installed in the main water tank 1. The upper end of the oil overflow pipe 21 is at approximately the same height as the high water level switch 19, and the lower end is connected to the main drain pipe 20.

[0034] The utility model is designed with two water level switches. When water is put into the low water level switch 18, the program for heating the water in the main water tank 1 can be started, and then water can be added to the high water level switch 19 while heating, saving heating and the entire cleaning time.

[0035] The control electric cabinet 23 of the present invention can be arranged below the small water tank 11 to effectively utilize the product space.

[0036] The bottom surface of the main water tank 1 is designed as an inclined surface, and a sewage collection tank 22 is provided at the lowest end of the inclined surface. The sewage collection tank 22 is connected to the main drainage pipe 20.

[0037] The upper part of the main water tank 1 is sealed by two sliding covers 24 that slide against each other. The sliding covers 24 are hollow covers, which have a good heat preservation effect on the one hand, and prevent water droplets from splashing out during the dishwashing process on the other hand, and isolate noise.

[0038] An overflow port 26 is provided above the main water tank 1 , and the main water tank 1 is connected to the overflow port 26 through an overflow pipe 25 .

[0039] In order to ensure the orderly arrangement of the tableware, a plurality of parallel partitions 30 are provided in the main sink 1 to separate the rows of tableware.

[0040] The energy-saving dishwasher of this utility model is an automated device that can be used to wash tableware, vegetables, fruits, etc. Taking washing tableware as an example, the specific working process is as follows:

[0041] Cleaning phase: Drain water to the minimum water level switch 18, start the water tank heating pipe 27, and stop adding water after reaching the maximum water level. Start the ultrasonic generator 6, and use the ultrasonic transducer to emit high frequency to separate food residues, stains, pesticide residues, etc. After several minutes, start the blower 10 and inject fresh air into the water tank through the air nozzle 15. The bubbling principle facilitates the faster removal of residues from the surface of the tableware. In addition, the separated oil stains are agitated by the water surface and overflow into the oil overflow pipe 21 and are directly discharged. During the cleaning phase, the heat extraction fan 8, the drying and heating module 7, and the air duct solenoid valve 17 are closed.

[0042] After the cleaning is completed, the ultrasonic wave and bubbling are stopped, and the automatic drainage ball valve 28 is opened to automatically drain the water.

[0043] Rinsing: Conventional methods often require a sink of hot water for rinsing. This new method uses a direct, upward and downward spraying system, saving significant water and energy. The water inlet solenoid valve 29 on the water inlet pipe 12 is activated to supply water to the upper rotating spray arm and rotating spray plate 3. Clean water is then sprayed through the upper spray arm 2 and rotating spray plate 3 to rinse the washed dishes.

[0044] Drying stage: Turn on the small heat extraction fan 8, blower 10, drying heating module 7, and air duct solenoid valve 17. The blower 10 draws air from the hot air exchange box 9 into the air cavity 72 of the drying heating module 7. After being heated into hot air, it is ejected from the air nozzle 15 and the hot air inlet 4 to dry the tableware. At the same time, the small heat extraction fan sucks the hot air in the main water tank 1 out of the hot air outlet 5 into the hot air exchange box 9. Due to the contact between the hot air and the pipeline and the contact between the hot air and the air entering from the air inlet 91, small water droplets will be generated in the hot air exchange box 9 after condensation. The small water droplets can drip out through the air inlet 91 with the opening facing downward.

[0045] The design of the small water tank 11 provided in the present invention ensures that the machine can wash while also meeting the manual cleaning needs.

[0046] It should be understood that the specific embodiments described above are only used to explain the present invention and are not intended to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A hot air circulation system, characterized in that: The invention comprises a main water tank, a hot air inlet (4) and a hot air outlet (5) arranged on the main water tank, a small heat extraction fan (8) connected to the hot air outlet (5) through a pipeline, a hot air exchange box (9) connected to the small heat extraction fan (8) through a pipeline, a blower (10) connected to the hot air exchange box (9) through a pipeline, and a hot air inlet pipeline (13) connected to the hot air inlet (4); the blower (10) is connected to the hot air inlet pipeline (13); and the bottom of the hot air exchange box (9) has an air inlet hole (91) with an opening facing downward.

2. A hot air circulation system according to claim 1, characterized in that: The invention also includes a drying and heating module (7) connected to the blower pipe. The drying and heating module (7) includes an air cavity (72) and a heater (71) arranged in the air cavity (72). The blower (10) blows air into the air cavity (72), and the heater (71) heats the air.

3. A hot air circulation system according to claim 1, characterized in that: An anti-backflow air duct (14) is provided between the hot air inlet duct (13) and the drying and heating module (7); the anti-backflow air duct (14) is an arched duct, the top of which is higher than the top of the main water tank (1).

4. A hot air circulation system according to claim 3, characterized in that: The hot air inlet duct (13) below the hot air inlet (4) is provided with an air nozzle (15) for blowing air toward the inside of the water tank, and an air duct solenoid valve (17) is provided on the hot air inlet duct (13) between the air nozzle (15) and the hot air inlet (4).

5. An energy-saving dishwasher, characterized by: The invention comprises the hot air circulation system according to claim 1.

6. The energy-saving dishwasher according to claim 5, characterized in that: An overflow port (26) is provided above the main water tank (1), and the main water tank (1) is connected to the overflow port (26) via an overflow pipe (25).

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