阅读说明：本技术 一种节水节能型蒸汽洗碗机 (water-saving and energy-saving steam dish-washing machine ) 是由 胡晓兵 陈博洋 邓希 李航 张欣 周邵武 于 2019-09-19 设计创作，主要内容包括：本发明公开了一种节水节能型蒸汽洗碗机,涉及洗碗机领域,包括内胆、蒸汽发生装置、蒸汽喷射系统、上碗篮和下碗篮；上碗篮和下碗篮依次固设于内胆内,蒸汽发生装置用于给蒸汽喷射系统提供蒸汽,蒸汽喷射系统包括上喷气装置、中喷气装置和下喷气装置,中喷气装置的上下两侧均有喷头,上喷气装置设置于上碗篮上方,下喷气装置设置于下碗篮下方,中喷气装置设置于上碗篮和下碗篮之间；蒸汽喷射系统可在喷射蒸汽时转动,且能实现单独对下碗篮进行清洗和统一对上下碗篮都进行清洗两种模式的切换选择；蒸汽发生装置包括绝热外壳和水箱,绝热外壳与内胆通过管道连通。该蒸汽洗碗机的清洗方式灵活,并能进行蒸汽余热回收利用,实现节水节能的效果。(The invention discloses a water-saving and energy-saving steam dish-washing machine, which relates to the field of dish-washing machines and comprises an inner container, a steam generating device, a steam spraying system, an upper dish basket and a lower dish basket; the upper bowl basket and the lower bowl basket are sequentially and fixedly arranged in the inner container, the steam generating device is used for providing steam for the steam injection system, the steam injection system comprises an upper air injection device, a middle air injection device and a lower air injection device, spray heads are arranged on the upper side and the lower side of the middle air injection device, the upper air injection device is arranged above the upper bowl basket, the lower air injection device is arranged below the lower bowl basket, and the middle air injection device is arranged between the upper bowl basket and the lower bowl basket; the steam injection system can rotate when injecting steam, and can realize the switching selection of two modes of independently cleaning the lower bowl basket and uniformly cleaning the upper bowl basket and the lower bowl basket; the steam generating device comprises a heat insulation shell and a water tank, and the heat insulation shell is communicated with the inner container through a pipeline. The steam dish washing machine has flexible cleaning mode, can recycle the waste heat of the steam, and realizes the effects of water and energy saving.)

1. a water-saving and energy-saving steam dish-washing machine is characterized by comprising an inner container (100), a steam generating device (200), a steam spraying system (300), an upper bowl basket (400) and a lower bowl basket (500);

The upper bowl basket (400) and the lower bowl basket (500) are sequentially and fixedly arranged in the inner container (100);

the steam injection system (300) comprises a lower inner pipe (310), a lower outer pipe (320), an upper pipe (330), a middle flow dividing head (340), a plurality of lower air injection devices (350), a plurality of middle air injection devices (360) and a plurality of upper air injection devices (370),

The middle flow dividing head (340) comprises a communication outer pipe (341), a communication inner pipe (342), a plurality of connecting pipes (344) and a flow dividing clapboard (343), the communication inner pipe (342) is arranged in the communication outer pipe (341) in a penetrating way, a flow cavity is formed between the outer wall of the communication inner pipe (342) and the inner wall of the communication outer pipe (341), one ends of the connecting pipes (344) are fixedly connected with the outer wall of the communication outer pipe (341), the flow dividing clapboard (343) is fixedly arranged in the connecting pipes (344) along the axial direction of the connecting pipes (344) and divides the connecting pipes (344) into a communication upper cavity (346) and a communication lower cavity (345), the communication upper cavity (346) is communicated with the inner cavity of the communication inner pipe (342), and the communication lower cavity (345) is communicated with the flow cavity,

The middle air injection device (360) comprises a two-way air injection pipe (361), a central partition plate (362) and a plurality of sprayers, the two-way air injection pipe (361) is of a hollow structure with one open end, the central partition plate (362) is fixedly arranged in the two-way air injection pipe (361) along the axial direction of the two-way air injection pipe (361) and divides the two-way air injection pipe (361) into an upper cavity (363) and a lower cavity (364), the sprayers are fixedly connected with the upper side and the lower side of the two-way air injection pipe (361), the sprayer positioned on the upper side of the two-way air injection pipe (361) is communicated with the upper cavity (363), the sprayer positioned on the lower side of the two-way air injection pipe (361) is communicated with the lower cavity (364), the open ends of the two-way air injection pipe (361) are fixedly connected with one ends, far away from the communication outer pipe (341), of the, the lower chamber (364) is communicated with the communication lower chamber (345),

the lower inner pipe (310) is arranged in the lower outer pipe (320) in a penetrating manner, one end of the lower inner pipe (310) is fixedly connected with one end of the communicating inner pipe (342), one end of the lower outer pipe (320) is fixedly connected with one end of the communicating outer pipe (341), one end of the upper pipe (330) is fixedly connected with the other end of the communicating outer pipe (341), a lower air injection channel is formed between the outer wall of the lower inner pipe (310) and the inner wall of the lower outer pipe (320), the lower air injection channel is communicated with the circulation cavity, the upper pipe (330) is of a hollow structure with one closed end, an upper air injection channel is formed in the upper pipe, and the upper air injection channel is communicated with both the inner cavity of the communicating inner pipe (342) and the inner cavity of the lower inner pipe (310),

The lower air injection device (350) and the upper air injection device (370) both comprise a one-way air injection pipe (351) and a plurality of nozzles, the one-way air injection pipe (351) is of a hollow structure with one open end, the plurality of nozzles are fixedly arranged on the side wall of the one-way air injection pipe (351) and communicated with the inner cavity of the one-way air injection pipe, the open end of the one-way air injection pipe (351) of the upper air injection device (370) is fixedly connected with the outer wall of the upper pipe (330), the inner cavity of the one-way air injection pipe (351) of the upper air injection device (370) is communicated with the upper air injection channel, the open end of the one-way air injection pipe (351) of the lower air injection device (350) is fixedly connected with the outer wall of the lower outer pipe (320), and the inner cavity of the one-way air injection pipe (351) of the lower;

the upper air injection device (370) is arranged above the upper bowl basket (400), the nozzle outlet of the upper air injection device (370) is arranged towards the direction of the upper bowl basket (400), the lower air injection device (350) is arranged below the lower bowl basket (500), the nozzle outlet of the lower air injection device (350) is arranged towards the direction of the lower bowl basket (500), the middle air injection device (360) is arranged between the upper bowl basket (400) and the lower bowl basket (500), and the nozzle outlets at two sides of the middle air injection device (360) are respectively arranged towards the directions of the upper bowl basket (400) and the lower bowl basket (500);

and the air outlet of the steam generating device (200) is communicated with the inner cavity of the lower inner pipe (310) and the inner cavity of the lower outer pipe (320).

2. the water-saving and energy-saving steam dishwasher of claim 1, further comprising a lower electric air injection valve (380) and an upper electric air injection valve (390), wherein the lower electric air injection valve (380) is used for controlling the on-off or flow rate of the air flow in the inner cavity of the lower outer pipe (320), and the upper electric air injection valve (390) is used for controlling the on-off or flow rate of the air flow in the inner cavity of the lower inner pipe (310).

3. the water-saving and energy-saving steam dishwasher of claim 2, characterized in that the inner container (100) is internally provided with a pressure sensor and further comprises a controller, and the pressure sensor, the lower electric air injection valve (380) and the upper electric air injection valve (390) are all electrically connected with the controller.

4. the water and energy saving type steam dishwasher of claim 3, wherein the steam generating device (200) comprises a bottom case (210), an electric heating pipe (220), a heat conducting shell (230) and a heat insulating shell (240), the heat conducting shell (230) and the heat insulating shell (240) are both fixedly connected with the bottom case (210), the heat conducting shell (230) is disposed in the heat insulating shell (240), a recycling cavity is formed between the heat conducting shell (230) and the heat insulating shell (240), a water tank is formed between the heat conducting shell (230) and the bottom case (210), the electric heating pipe (220) is disposed in the water tank,

An air outlet pipe (231) communicated with the water tank is arranged at the top of the heat conducting shell (230), and the air outlet pipe (231) penetrates through the heat insulating shell (240) and is communicated with the inner part of the lower outer pipe (320) and the inner part of the lower inner pipe (310);

The steam recovery device is characterized by further comprising a steam recovery pipe (241), wherein two ends of the steam recovery pipe (241) are respectively communicated with the inner container (100) and the recovery cavity.

5. The water and energy saving type steam dishwasher of claim 4, further comprising a suction pump (244), wherein a suction inlet of the suction pump (244) is communicated with the inner tub (100), a discharge outlet of the suction pump 244 is communicated with the recovery chamber through the steam recovery pipe (241), and the suction pump (244) is electrically connected with the controller.

6. The water-saving and energy-saving steam dish washing machine as claimed in claim 4, wherein a temperature sensor is arranged in the inner container (100), and the temperature sensor and the electric heating pipe (220) are electrically connected with the controller.

7. The water and energy saving steam dish washer of claim 4, wherein a water level sensor is arranged in the water tank, further comprising a water pump (232), the water pump (232) is used for supplying water to the water tank, and the water level sensor and the water pump (232) are both electrically connected with the controller.

8. The water and energy saving type steam dishwasher of claim 1, wherein the steam injection system (300) is rotatable within the inner tub (100).

9. The water-saving and energy-saving steam dish washing machine according to claim 8, wherein the lower inner pipe (310), the lower outer pipe (320) and the upper pipe (330) are straight pipes which are vertically arranged, the spraying directions of the spray heads are all inclined to the vertical direction, and steam can drive the steam spraying system (300) to rotate when being sprayed out of the spray heads.

Technical Field

the invention relates to the field of dish washing machines, in particular to a water-saving and energy-saving steam dish washing machine.

background

The dish washer is used for automatically cleaning tableware such as dishes, chopsticks, dishes, knives and forks, and can be divided into two types of box type and conveying type according to the structure. With the development of dishwasher technology, various types of vortex dishwashers, steam dishwashers, etc. have been gradually developed. Among them, the washing method of the steam dish washer is mainly to soften and wash the contaminants on the surface of the dishes through the steam pretreatment. The existing steam dish-washing machine is mainly of an integrated structure, the tableware in the inner container can be integrally washed no matter how many pieces of tableware are, the washing mode is single, and when the quantity of the tableware is small, the dish-washing machine can consume the same water quantity and heat to complete the washing, so that the unnecessary energy consumption and the water consumption of the dish-washing machine are increased. Meanwhile, when the steam dish-washing machine in the prior art washes dishes, part of steam is directly discharged out of the inner container without cleaning in the cleaning process, so that heat waste is caused.

Disclosure of Invention

the invention aims to overcome the defects of the prior art and provides a water-saving and energy-saving steam dish-washing machine, which has a flexible cleaning mode, can recycle steam waste heat and realize the effects of saving water and energy.

The purpose of the invention is realized by the following technical scheme:

A water-saving and energy-saving steam dish-washing machine comprises an inner container, a steam generating device, a steam spraying system, an upper bowl basket and a lower bowl basket;

The upper bowl basket and the lower bowl basket are fixedly arranged in the inner container in sequence;

The steam injection system comprises a lower inner pipe, a lower outer pipe, an upper pipe, a middle flow dividing head, a plurality of lower air injection devices, a plurality of middle air injection devices and a plurality of upper air injection devices,

The middle flow head comprises a communicating outer pipe, a communicating inner pipe, a plurality of connecting pipes and a flow dividing clapboard, the communicating inner pipe is arranged in the communicating outer pipe in a penetrating way, a flow cavity is formed between the outer wall of the communicating inner pipe and the inner wall of the communicating outer pipe, one end of each of the connecting pipes is fixedly connected with the outer wall of the communicating outer pipe, the flow dividing clapboard is fixedly arranged in the connecting pipe along the axial direction of the connecting pipe and divides the connecting pipe into a communicating upper cavity and a communicating lower cavity, the communicating upper cavity is communicated with the inner cavity of the communicating inner pipe, and the communicating lower cavity is communicated with the flow cavity,

The middle part gas injection device comprises a two-way gas injection pipe, a central clapboard and a plurality of sprayers, the two-way gas injection pipe is of a hollow structure with one end open, the central clapboard is fixedly arranged in the two-way gas injection pipe along the axial direction of the two-way gas injection pipe and separates the two-way gas injection pipe into an upper cavity and a lower cavity, the sprayers are respectively fixedly connected with the upper side and the lower side of the two-way gas injection pipe, the sprayer at the upper side of the two-way gas injection pipe is communicated with the upper cavity, the sprayer at the lower side of the two-way gas injection pipe is communicated with the lower cavity, the open end of the two-way gas injection pipe is respectively and fixedly connected with the connecting pipe to keep away from the end of,

The lower inner pipe penetrates through the lower outer pipe, one end of the lower inner pipe is fixedly connected with one end of the communicating inner pipe, one end of the lower outer pipe is fixedly connected with one end of the communicating outer pipe, one end of the upper pipe is fixedly connected with the other end of the communicating outer pipe, a lower air injection channel is formed between the outer wall of the lower inner pipe and the inner wall of the lower outer pipe and is communicated with the circulating cavity, the upper pipe is of a hollow structure with one closed end and is internally provided with an upper air injection channel, and the upper air injection channel is communicated with the inner cavity of the communicating inner pipe and the inner cavity of the lower inner pipe,

The lower air injection device and the upper air injection device both comprise one-way air injection pipes and a plurality of nozzles, the one-way air injection pipes are of a hollow structure with one open end, the plurality of nozzles are fixedly arranged on the side walls of the one-way air injection pipes and communicated with the inner cavities of the one-way air injection pipes, the open ends of the one-way air injection pipes of the upper air injection device are fixedly connected with the outer wall of the upper pipe, the inner cavities of the one-way air injection pipes of the upper air injection device are communicated with the upper air injection channel, the open ends of the one-way air injection pipes of the lower air injection device are fixedly connected with the outer wall of the lower outer pipe, and the inner cavities of the one-way air injection;

The upper air injection device is arranged above the upper bowl basket, a nozzle outlet of the upper air injection device is arranged towards the upper bowl basket, the lower air injection device is arranged below the lower bowl basket, a nozzle outlet of the lower air injection device is arranged towards the lower bowl basket, the middle air injection device is arranged between the upper bowl basket and the lower bowl basket, and nozzle outlets positioned at two sides of the middle air injection device are respectively arranged towards the upper bowl basket and the lower bowl basket;

And the air outlet of the steam generating device is communicated with the inner cavity of the lower inner pipe and the inner cavity of the lower outer pipe.

The lower air injection electric valve is used for controlling the on-off or flow of the air flow in the inner cavity of the lower outer pipe, and the upper air injection electric valve is used for controlling the on-off or flow of the air flow in the inner cavity of the lower inner pipe.

Further, be provided with pressure sensor in the inner bag, still include the controller, pressure sensor, lower jet-propelled motorised valve and last jet-propelled motorised valve all with the controller electricity federation.

Further, the steam generating device comprises a bottom shell, an electric heating tube, a heat conducting shell and a heat insulating shell, wherein the heat conducting shell and the heat insulating shell are both fixedly connected with the bottom shell, the heat conducting shell is arranged in the heat insulating shell, a recovery cavity is formed between the heat conducting shell and the heat insulating shell, a water tank is formed between the heat conducting shell and the bottom shell, the electric heating tube is arranged in the water tank,

The top of the heat conduction shell is provided with an air outlet pipe communicated with the water tank, and the air outlet pipe penetrates through the heat insulation shell and is communicated with the lower outer pipe and the lower inner pipe;

the steam recovery pipe is arranged in the inner container, and the two ends of the steam recovery pipe are communicated with the recovery cavity.

The steam recovery device further comprises an air pump, a suction inlet of the air pump is communicated with the inner container, an exhaust outlet of the air pump is communicated with the recovery cavity through the steam recovery pipe, and the air pump is electrically connected with the controller.

Furthermore, a temperature sensor is arranged in the inner container, and the temperature sensor and the electric heating tube are electrically connected with the controller.

further, be provided with level sensor in the water tank, still include the water pump, the water pump is used for the water tank supplies water, level sensor and water pump all with the controller electricity federation.

further, the steam injection system can rotate in the inner container.

Furthermore, the lower inner pipe, the lower outer pipe and the upper pipe are straight pipes which are vertically arranged, the spraying directions of the spray heads are all inclined to the vertical direction, and steam can drive the steam spraying system to rotate when being sprayed out from the spray heads.

The invention has the beneficial effects that:

Two-layer bowl basket about setting up in this water conservation energy-saving steam dish washer's the inner bag to set up steam injection system and steam generating device, this steam injection system's lower jet device and middle part jet device's lower part shower nozzle can wash bowl basket down to the pertinence, go up jet device and middle part jet device's upper portion shower nozzle can rinse bowl basket on the pertinence, and can realize wasing bowl basket down alone and unifying all wasing the switching of two kinds of modes to bowl basket from top to bottom. Compared with the prior art, the cleaning mode of the device is more flexible, namely when more bowls need to be cleaned at one time, the bowls can be placed in the two bowl baskets to be cleaned simultaneously, so that the single cleaning scale is ensured; and when a small number of bowls are cleaned, the bowls can be placed in the lower bowl basket for independent cleaning, so that the amount of steam used for cleaning is reduced, and the purposes of saving water and energy are achieved.

the steam injection system can rotate in the inner container, so that dead cleaning corners are effectively avoided, the cleaning time does not need to be prolonged due to the fact that the cleaning effect is guaranteed, the using amount of steam can be reduced, and the purposes of saving water and energy are achieved. Each nozzle is obliquely arranged, and the steam can directly drive the steam injection system to rotate when being sprayed out from the nozzles, so that additional power equipment is not needed.

the steam generating device is provided with a water tank, and steam is generated by heating water in the water tank. The water tank shell is a heat-conducting shell, a layer of insulating shell is arranged outside the water tank shell, and a steam recovery space is formed between the two shells. The steam after being used is cleaned in the inner container is introduced into the steam recovery space through the steam recovery pipe, the water tank is heated by utilizing the waste heat of the steam, the temperature of the water tank is kept, and therefore the energy consumption required by steam generation can be reduced, and the purpose of saving energy is achieved.

drawings

FIG. 1 is a schematic structural view of a water and energy saving steam dishwasher according to the present invention;

FIG. 2 is a schematic diagram of a vapor injection system;

FIG. 3 is a schematic sectional view of the lower structure of the steam injection system;

FIG. 4 is a schematic view of the structure of the central flow distribution head;

FIG. 5 is a schematic structural view of a middle air injection device;

FIG. 6 is a schematic structural view of a lower air injection device;

FIG. 7 is a schematic structural view of an upper air injection device;

fig. 8 is an exploded view of the steam generator.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

As shown in fig. 1, a water and energy saving type steam dish washer includes a housing, in which a partition is provided to divide the housing into an upper inner tub 100 and a lower installation chamber. An upper bowl basket 400 and a lower bowl basket 500 are fixed in the inner container 100 in sequence from top to bottom through a bracket, a steam injection system 300 is provided, and a steam generating device 200 is installed in the installation cavity.

As shown in fig. 2 and 3, the steam injection system 300 includes a lower inner pipe 310, a lower outer pipe 320, an upper pipe 330, a middle flow head 340, a plurality of lower jet devices 350, a plurality of middle jet devices 360, and a plurality of upper jet devices 370.

As shown in fig. 4, the middle flow-dividing head 340 includes a communication outer tube 341, a communication inner tube 342, a plurality of connection tubes 344, and a flow-dividing partition 343. The communicating inner tube 342 is arranged in the communicating outer tube 341 in a penetrating manner, a circulation cavity is formed between the outer wall of the communicating inner tube 342 and the inner wall of the communicating outer tube 341, one ends of a plurality of connecting tubes 344 are fixedly connected with the outer wall of the communicating outer tube 341, a flow dividing partition plate 343 is fixedly arranged in the connecting tubes 344 along the axial direction of the connecting tubes 344 and divides the connecting tubes 344 into communicating upper cavities 346 and communicating lower cavities 345, the communicating upper cavities 346 are communicated with the inner cavity of the communicating inner tube 342, and the communicating lower cavities 345 are communicated with the circulation cavity.

as shown in fig. 5, the middle air injection device 360 includes a bidirectional air injection tube 361, a central partition 362 and a plurality of nozzles, the bidirectional air injection tube 361 is a hollow structure with an open end, the central partition 362 is fixedly disposed in the bidirectional air injection tube 361 along an axial direction of the bidirectional air injection tube 361 and divides the bidirectional air injection tube 361 into an upper chamber 363 and a lower chamber 364, the plurality of nozzles are respectively fixedly connected to upper and lower sides of the bidirectional air injection tube 361, the nozzles located at an upper side of the bidirectional air injection tube 361 are communicated with the upper chamber 363, the nozzles located at a lower side of the bidirectional air injection tube 361 are communicated with the lower chamber 364, open ends of the plurality of bidirectional air injection tubes 361 are respectively fixedly connected to ends of the plurality of connection tubes 344 far away from the communication outer tube 341, the.

As shown in fig. 2 and 3, the lower inner tube 310 is inserted into the lower outer tube 320, one end of the lower inner tube 310 is fixedly connected to one end of the communicating inner tube 342, one end of the lower outer tube 320 is fixedly connected to one end of the communicating outer tube 341, one end of the upper tube 330 is fixedly connected to the other end of the communicating outer tube 341, a lower air injection channel is formed between the outer wall of the lower inner tube 310 and the inner wall of the lower outer tube 320, the lower air injection channel is communicated with the circulation cavity, the upper tube 330 is a hollow structure with one closed end and an upper air injection channel is formed therein, and the upper air injection channel is communicated with both the inner cavity of the communicating inner tube 342 and the inner cavity of the.

As shown in fig. 6 and 7, the lower jet device 350 and the upper jet device 370 both comprise a one-way jet pipe 351 and a plurality of nozzles, the one-way jet pipe 351 is of a hollow structure with one open end, the plurality of nozzles are all fixedly arranged on the side wall of the one-way jet pipe 351 and communicated with the inner cavity of the one-way jet pipe 351, the open end of the one-way jet pipe 351 of the upper jet device 370 is fixedly connected with the outer wall of the upper pipe 330, the inner cavity of the one-way jet pipe 351 of the upper jet device 370 is communicated with the upper jet channel, the open end of the one-way jet pipe 351 of the lower jet device 350 is fixedly connected with the outer wall of the lower outer pipe 320, and the inner cavity of the one-way.

As shown in fig. 1 to 3, the upper jet device 370 is disposed above the upper bowl basket 400, the nozzle outlet of the upper jet device 370 is disposed in the direction of the upper bowl basket 400, the lower jet device 350 is disposed below the lower bowl basket 500, the nozzle outlet of the lower jet device 350 is disposed in the direction of the lower bowl basket 500, the middle jet device 360 is disposed between the upper bowl basket 400 and the lower bowl basket 500, and the nozzle outlets at two sides of the middle jet device 360 are disposed in the directions of the upper bowl basket 400 and the lower bowl basket 500, respectively; the air outlet of the steam generating device 200 is communicated with the inner cavity of the lower inner pipe 310 and the inner cavity of the lower outer pipe 320.

this steam dish washer will set up bowl basket 400 and bowl basket 500 down in the inner bag layering, and the steam injection system 300 blowout steam through integrated setting can utilize the air current to wash simultaneously to the bowl utensil softening treatment in last bowl basket 400 and the bowl basket 500 down, reaches the purpose of washing the dishes, and steam possesses the high temperature simultaneously, can play certain disinfection's purpose. The steam injection system 300 is an integrated split design, and when it works, the steam generated by the steam generator 200 enters the steam injection system 300 and can be divided into two paths for delivery, one path is delivered by a lower air injection channel formed between the outer wall of the lower inner pipe 310 and the inner wall of the lower outer pipe 320, and the other path is delivered by the inner cavity of the lower inner pipe 310. The steam delivered by the lower jet channel is divided into two parts, one part enters the lower cavity 364 of the bidirectional jet pipe 361 through the circulation cavity in the middle part flow dividing head 340 and the communicating lower cavity 345, is jetted by the nozzle, and performs targeted cleaning on the bowls on the upper part of the lower bowl basket 500; the other part directly enters the lower air injection device 350 and is injected by the nozzle thereof to carry out targeted cleaning on the bowls at the lower part of the lower bowl basket 500. The steam delivered through the inner cavity of the lower inner tube 310 enters the middle flow head 340 and then is divided into two parts, one part enters the upper cavity 363 of the two-way gas injection tube 361 through the upper cavity 346, and is sprayed out by the spray head of the upper cavity 363, so that the bowl at the lower part of the upper bowl basket 400 is cleaned in a targeted manner; the other part flows into the upper jet device 370 through the upper pipe 330, and is jetted out by the jet head to clean the upper part of the upper bowl basket 400. The device can specifically clean bowls in two layered bowl baskets, and can realize the switching of two modes of simultaneously cleaning the bowls in the two bowl baskets or only cleaning the bowls in the lower bowl basket by arranging the switch valve on the lower inner tube 310. Compared with the prior art, the cleaning mode of the device is more flexible, namely when more bowls need to be cleaned at one time, the bowls can be placed in the two bowl baskets to be cleaned simultaneously, so that the single cleaning scale is ensured; and when a small number of bowls are cleaned, the bowls can be placed in the lower bowl basket for independent cleaning, so that the amount of steam used for cleaning is reduced, and the purposes of saving water and energy are achieved.

when in implementation, the steam dishwasher further comprises a lower air injection electric valve 380 and an upper air injection electric valve 390, wherein the lower air injection electric valve 380 is used for controlling the on-off or flow of air flow in the inner cavity of the lower outer pipe 320, so that the automatic control of the flow and the on-off of the steam entering the whole dishwasher can be realized; the upper air injection electric valve 390 is used for controlling the on-off or flow of the air flow in the inner cavity of the lower inner tube 310, and can realize the automatic control of the steam flow and the on-off for cleaning the upper bowl basket. By arranging the electric valve, automatic control and remote control can be realized, and the mode switching operation is convenient; meanwhile, the electric valve can adjust the opening of the valve, and proper flow is selected, so that the waste of steam during cleaning is reduced, and the purposes of saving water and energy are achieved.

A pressure sensor is arranged in the inner container 100, the steam dish washing machine is also provided with a controller, and the pressure sensor, the lower air injection electric valve 380 and the upper air injection electric valve 390 are all electrically connected with the controller. In practical application, in order to achieve a good high-temperature sterilization effect, the inner container 100 of the steam dish-washing machine needs to be sealed to reduce heat loss, and the sealed space is prone to potential safety hazards caused by excessive air pressure. The pressure sensor is arranged, so that the air pressure in the inner container 100 can be monitored in real time, once the air pressure value is too high, the electric valve can be controlled by the controller to be closed, the steam entering is reduced, and the safety accident caused by the continuous rising of the air pressure in the inner container 100 is avoided. The controller controls the actions of the lower air injection electric valve 380 and the upper air injection electric valve 390, and the functions of automatic control and remote control can be conveniently realized.

In the above structure, if the positions of the lower air injection device 350, the middle air injection device 360 and the upper air injection device 370 are fixed, it is very easy to directly wash only a certain part of the bowls of the bowl basket, and it is very easy to wash dead corners of the bowls which are far away. In order to ensure the cleaning effect, the number of each air injection device is increased to enable the coverage of the air injection device to be wider, or the time of the injection cleaning is prolonged, and the positions which are not easy to clean are cleaned. The increase of the number of each air injection device leads to more complex structure and higher cost; prolonging the time of jet cleaning will lead to a great waste of steam and water and energy consumption. Further, the steam injection system 300 may rotate within the inner tub 100. In practice, the steam injection system 300 can be rotatably connected to the partition and the top plate of the housing at both ends thereof, and is driven to rotate by an external driving device. The positions of the lower air injection device 350, the middle air injection device 360 and the upper air injection device 370 can be adjusted through rotation, so that the cleaning dead angle is avoided.

In this embodiment, the steam injection system 300 is integrally made of a light material, the lower inner pipe 310, the lower outer pipe 320 and the upper pipe 330 are straight pipes which are vertically arranged, and the injection directions of the nozzles are all inclined to the vertical direction, specifically, as shown in fig. 1 to 3 and 5 to 7, an upper air injection device 370, a middle air injection device 360 and a lower air injection device 350 are positioned on the same plane on the longitudinal plane, and the nozzles are inclined to one direction. When the device is specifically arranged, the inclination angle of the spray head is set to be 10-15 degrees, so that on one hand, the travelling distance of steam sprayed out of the spray head is reduced as much as possible, the steam can act on bowls as soon as possible, the washing pressure is maintained, and the cleaning effect is ensured; on the other hand, the magnitude of the horizontal component force is controlled to only slowly rotate the steam injection system 300, so that the operation is kept stable.

The steam generating device 200 may be any device capable of generating high-temperature steam without affecting the use of the above structure. In this embodiment, the steam generator 200 is shown in fig. 8, and includes a bottom shell 210, an electric heating tube 220, a heat conducting shell 230 and a heat insulating shell 240, wherein the heat conducting shell 230 and the heat insulating shell 240 are both fixedly connected to the bottom shell 210, the heat conducting shell 230 is disposed in the heat insulating shell 240, a recycling cavity is formed between the heat conducting shell 230 and the heat insulating shell 240, a water tank is formed between the heat conducting shell 230 and the bottom shell 210, the electric heating tube 220 is disposed in the water tank, an air outlet tube 231 communicated with the water tank is disposed at the top of the heat conducting shell 230, and the air outlet tube 231 penetrates through the heat insulating shell 240 and is communicated with the inside of the; the water in the water tank can be evaporated by the heating electric heating tube 220, and the generated steam enters the lower outer tube 320 and the lower inner tube 310 through the air outlet tube 231 for the steam injection system 300 to work. A steam recovery pipe 241 communicating with the recovery chamber is provided in the heat insulating casing 240, and the other end of the steam recovery pipe 241 communicates with the inner container 100. After the steam sprayed by each spray head washes the bowls, the steam is recycled to the heat insulation shell 240 through the steam recycling pipe 241, the steam still has a part of waste heat, and the part of waste heat can be conducted through the heat conduction shell 230 to preheat the water tank and keep the temperature of the water tank, so that the energy consumption required by the generation of the steam can be reduced, and the purpose of saving energy is achieved. The excess steam preheated in the heat insulating case 240 for the water tank is finally discharged through the exhaust pipe disposed opposite to the steam recovery pipe 241.

further, an air pump 244 is provided, an air suction inlet of the air pump 244 is communicated with the inner container 100, an air exhaust outlet of the air pump 244 is communicated with the recovery cavity through a steam recovery pipe 240, and the air pump 244 is electrically connected with the controller. The air pump 244 is used to pump the steam in the inner container 100 into the heat insulation shell 240 to complete the heat exchange process. The air pump 244 is electrically connected with the controller to realize automatic control, and particularly, when the pressure sensor senses that the temperature in the liner 100 is high, the pressure can be relieved by the operation of the air pump, so that the safety is ensured.

Further, a temperature sensor is arranged in the inner container 100, and the temperature sensor and the electric heating tube 220 are both electrically connected with the controller. The temperature in the liner 100 is monitored by the temperature sensor and fed back to the controller, and finally the heating power of the electric heating tube 220 is controlled by the controller according to the requirement, so that the feedback closed-loop control can realize more accurate heating and reduce unnecessary energy loss.

further, be provided with level sensor in the water tank, still include water pump 232, water pump 232 is used for the feed tank to supply water, and level sensor and water pump 232 all are connected with the controller electricity. The water level condition in the water tank is monitored by the water level sensor and fed back to the controller, and the water pump 232 can automatically replenish water for the water tank under the control of the controller, so that automation is realized.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.