CN115381270A - Steam cooking utensil - Google Patents

Abstract

The invention discloses a steam cooking appliance, belongs to the technical field of food processing, and aims to overcome the defect that the existing steam rice cooker cannot be used at a high risk. The steam cooking appliance comprises a machine body, wherein a steam generator and a water tank are arranged on the machine body, a first flow passage and a second flow passage are arranged between the water tank and the steam generator, and the second flow passage is connected with a water purifying unit; and is provided with a flow direction control valve. Under the control action of the flow direction control valve, the water tank can be communicated with the steam generator selectively through the first flow passage or the second flow passage, under the condition that the water purifying unit cannot be used, the water tank can supply water for the steam generator through the first flow passage, the basic cooking function of the steam cooking appliance can still be used, and the risk that the steam cooking appliance cannot be used is reduced.

Description

Steam cooking utensil

Technical Field

The invention belongs to the technical field of food processing, and relates to a steam rice cooker.

Background

There is a RO water purification unit that has integrateed among the prior art steam rice cooker, and RO water purification unit installs in the pot body of steam rice cooker, and the polyphone is between water tank and steam generator, carries out water purification treatment to the water that gets into steam generator, avoids steam generator to produce the residual incrustation scale in the steam process.

Water in a water tank of the existing steam rice cooker can enter a steam generator only through a water purifying unit, and once the water purifying unit breaks down, the whole steam rice cooker cannot be used, so that the risk that the steam rice cooker cannot be used is increased. In addition, for the steam rice cooker with the automatic water adding function, when the steam rice cooker is in a water adding mode, the steam generator does not work or works at a low power, the steam generator does not generate steam, water flow does not need to be filtered by the water purifying unit, and the water adding efficiency is low due to the fact that the water flow in the prior art must pass through the water purifying unit.

Disclosure of Invention

The invention provides a steam cooking utensil aiming at the problems in the prior art and aims to overcome the defect that the existing steam rice cooker cannot be used and has high risk.

The invention is realized by the following steps:

a steam cooking appliance comprises a machine body, a steam generator and a water tank for supplying water to the steam generator are arranged on the machine body,

a first flow passage and a second flow passage are arranged between the water tank and the steam generator, and the second flow passage is connected with a water purifying unit;

and a flow direction control valve is provided to communicate the water tank with the steam generator through the first flow passage or the second flow passage.

The water tank may be selectively communicated with the steam generator through the first flow passage or the second flow passage under the control of a flow direction control valve.

When the water tank is communicated with the steam generator through the first flow channel, water flow entering the steam generator does not pass through the water purification unit, the water purification unit does not act, and even if the water purification unit is damaged, fails or has a service life ending and the like, the water tank can still supply water to the steam generator, so that the basic cooking function of the steam cooking appliance is not influenced; in addition, after the user has installed other water purifiers, the water of adding the water tank has been through filterable, need not to carry out the secondary filter to the water of water tank, also can stop using the water purification unit that steam cooking utensil corresponds this moment, avoids water purification unit unnecessary to damage, prolongs water purification unit's life.

When the water tank passes through the second runner and steam generator communicates, because the second runner is connected with the water purification unit, impurity and/or mineral element in former aquatic can be filtered to the water purification unit, promote the health nature and the edible taste of culinary art food, also can reduce the incrustation scale and pile up in steam generator, extension steam generator's life, the reduction is maintained or the frequency of maintenance to steam generator.

Preferably, the flow direction control valve comprises a three-way flow passage, and three connecting ports of the three-way flow passage are respectively communicated with the water tank, the first flow passage and the second flow passage;

a valve core is movably arranged in the three-way flow passage to block the first flow passage or the second flow passage. The flow direction of water flow is controlled by matching the three-way flow channel with the valve core, the structure is more compact, and the failure rate is reduced.

Preferably, the flow direction control valve comprises a first solenoid valve and a second solenoid valve;

the first electromagnetic valve is arranged corresponding to the first flow channel and used for controlling the opening or closing of the first flow channel;

the second electromagnetic valve is arranged corresponding to the second flow passage and used for controlling the opening or closing of the second flow passage. The first electromagnetic valve controls the first flow passage to be opened, the second electromagnetic valve controls the second flow passage to be opened, the water tank is communicated with the steam generator through the first flow passage, and water flow does not pass through the water purification unit; the first electromagnetic valve controls the second flow passage to be closed, the second electromagnetic valve controls the second flow passage to be opened, the water tank is communicated with the steam generator through the second flow passage, and water flows through the water purification unit.

Preferably, the machine body is provided with a water purification joint, and the water purification unit is detachably connected to the water purification joint;

when the water purification unit is connected with the water purification joint, the water purification unit is connected in series on the second flow passage. When the raw water of water tank need not to get into steam generator through filtering, the water tank passes through first runner intercommunication steam generator, just can dismantle the water purification unit this moment and preserve, perhaps is used for the water purification unit on other products that can pass through the water purification unit, has also improved the convenience that the water purification unit was maintained, was maintained.

Preferably, the machine body is provided with a water purification joint, the water purification joint comprises a raw water interface and a water purification interface, and the water purification unit is provided with a raw water inlet and a water purification outlet which are respectively butted with the raw water interface and the water purification interface;

when the raw water inlet is inserted into the raw water interface, the raw water inlet props against the valve core, the valve core blocks the first flow passage, and the water tank is communicated with the steam generator through a second flow passage;

and a return piece is arranged between the three-way flow passage and the valve core, when the raw water inlet is separated from the raw water interface, the return piece enables the valve core to block the second flow passage, and the water tank is communicated with the steam generator through the first flow passage. After the water purification unit is installed, the water tank is automatically communicated with the steam generator through the second flow channel, after the water purification unit is disassembled, the water tank is automatically communicated with the steam generator through the first flow channel, corresponding sensors, controllers or specific additional operation cooperation is not needed, and convenience and reliability of switching of the water tank and the steam generator communication flow channel are improved.

Preferably, a push rod is arranged at a raw water inlet of the water purification unit, a sealing ring is arranged on the periphery of the raw water interface, the outer wall of the raw water inlet is in sealing contact with the sealing ring, and the push rod is inserted into the raw water interface and abuts against the valve core. The valve core is propped by the ejector rod, so that the influence of the side wall of the raw water inlet on the flow of the valve core can be avoided.

Preferably, a butt-joint coupling structure is arranged on the machine body and protrudes out of one side of the machine body, the water purifying joint is located on the butt-joint coupling structure, and the water purifying joint is arranged upwards. The butt-joint coupling structure is convenient for the water purification unit and is plugged into the water purification joint.

Preferably, the water purification unit is provided with a hidden groove, and when the water purification unit is connected with the water purification joint, the butt-joint coupling structure is embedded in the hidden groove. The compactness of the whole appearance of the water purification unit and the machine body is convenient to realize, and the accumulation of external oil smoke or dust at the water purification joint can be reduced so as to keep the water purification joint clean.

Preferably, the butt-joint coupling structure is slidably or rotatably mounted on the machine body, the machine body is provided with an accommodating cavity corresponding to the butt-joint coupling structure, and when the water purification unit is separated from the butt-joint coupling structure, the butt-joint coupling structure is accommodated in the accommodating cavity. Like this when not using the water purification unit, just can accomodate butt joint coupling structure in holding the chamber after dismantling the water purification unit, reduce the outside irregular shape of organism, promote the aesthetic property, reduce steam cooking utensil occupation space, avoid the water purification joint to be contaminated.

Preferably, the water purification unit comprises an RO filter element and a water purification pump, a power panel is arranged in the machine body, and the water purification pump is coupled with the power panel through an electric coupler; therefore, the water purifying pump does not need to be powered by an additional power supply or an additional controller to control the operation of the water purifying pump, and the control program can be integrated on a power panel of the steam cooking appliance.

The water purification joint comprises a raw water interface, a water purification interface and a wastewater interface, the wastewater interface is communicated with the water tank, the water purification unit comprises a wastewater outlet, the wastewater outlet is in butt joint with the wastewater interface, and the water purification interface and/or the wastewater interface are/is provided with a one-way valve. Need not special waste water collection unit like this, also need not to place steam cooking utensil near kitchen water drainage tank for steam cooking utensil's the position of placing can be more random, promotes to use and experiences, and waste water also can supply the water tank water yield to a certain extent, and the volume of water tank can be done lessly like this, is favorable to the miniaturized design of product.

According to the steam cooking appliance provided by the invention, under the control action of the flow control valve, the water tank can be selectively communicated with the steam generator through the first flow channel or the second flow channel, and under the condition that the water purifying unit cannot be used, the water tank can supply water to the steam generator through the first flow channel, so that the basic cooking function of the steam cooking appliance can be still used, and the risk that the steam cooking appliance cannot be used is reduced.

Drawings

FIG. 1 is a schematic view of a steam rice cooker;

FIG. 2 is a schematic view of the steam rice cooker without the water purifying unit;

FIG. 3 is a schematic view of the flow path of the water tank communicating with the steam generator through the first flow path;

FIG. 4 is a schematic view of the flow path of the water tank communicating with the steam generator through the second flow path;

FIG. 5 is a schematic view of the bottom of the water purification unit;

FIG. 6 is a schematic structural diagram of a butt-coupling structure;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is a schematic view of a flow control valve;

FIG. 9 is a schematic diagram of an exploded view of the flow control valve;

FIG. 10 is a schematic view of the valve cartridge;

fig. 11 is a schematic structural view of the steam rice cooker when the butt-coupling structure is received in the body.

Reference is made to the accompanying drawings in which: 100. a body; 110. a steam generator; 120. a water tank; 200. a butt coupling structure; 210. a first flow passage; 220. a second flow passage; 230. a flow direction control valve; 231. a water inlet channel; 232. a raw water interface; 233. a raw water joint; 234. a guide post; 235. inserting grooves; 236. a seal ring; 237. a limiting ring; 238. a valve seat; 239. a valve body; 240. a valve core; 241. a first seal ring; 242. a second seal ring; 243. a guide portion; 244. a water flow channel; 245. a flow guiding rib; 250. a water purification joint; 251. a water purification interface; 252. a one-way valve; 253. a waste water interface; 260. a housing; 261. a handle groove; 270. a return member; 280. an electric coupler; 290. a seal member; 300. a water purification unit; 310. a raw water inlet; 311. a top rod; 320. a purified water outlet; 330. hiding the groove; 340. and a waste water outlet.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings for the purpose of facilitating understanding and understanding of the technical solutions of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides a steam rice cooker, which is a specific application of the innovative scheme of the invention on the steam rice cooker, and the innovative scheme of the invention can also be applied to other cooking appliances adopting steam for heating.

As shown in fig. 1-2, the steam rice cooker includes a body 100, and a steam generator 110 and a water tank 120 for supplying water to the steam generator 110 are provided on the body 100.

As shown in fig. 3 to 4, a first flow passage 210 and a second flow passage 220 are provided between the water tank 120 and the steam generator 110, and a water purification unit 300 is connected to the second flow passage 220. The water purifying unit 300 is a component of the steam rice cooker, and is attached to the steam rice cooker. In other alternative embodiments, the steam rice cooker may not have the water purification unit 300, as long as the second flow channel 220 can be connected to the water purification unit 300, for example, the steam rice cooker is connected to an existing water purifier in a kitchen, and the water purification unit 300 is a feature of the use environment.

As shown in fig. 3 to 4, a flow direction control valve 230 is provided to communicate between the water tank 120 and the steam generator 110 through the first flow passage 210 or the second flow passage 220.

The water tank 120 may selectively communicate with the steam generator 110 through the first flow passage 210 or the second flow passage 220 under the control of the flow direction control valve 230.

As shown in fig. 3, when the water tank 120 is communicated with the steam generator 110 through the first flow channel 210, the water flow entering the steam generator 110 does not pass through the water purification unit 300, the water purification unit 300 does not function, the service life of the water purification unit 300 is limited, and it cannot be guaranteed that a user can replace the new water purification unit 300 in time, rice is used as an inexhaustible requirement in daily life, cooking of rice can be guaranteed to be completed under an emergency condition, the double flow channels are selectively opened, so that basic cooking can be completed when the service life of the water purification unit 300 expires, and user experience is improved. In addition, after the user has installed another water purifier, the water added into the water tank 120 is filtered, and the water in the water tank 120 does not need to be filtered for the second time, and at this time, the water purifying unit 300 corresponding to the steam cooking appliance can be stopped, so that unnecessary damage to the water purifying unit 300 is avoided, and the service life of the water purifying unit 300 is prolonged.

As shown in fig. 4, when the water tank 120 is communicated with the steam generator 110 through the second flow passage 220, since the second flow passage 220 is connected with the water purifying unit 300, the water purifying unit 300 can filter impurities and/or mineral elements in the raw water, improve the health and eating mouthfeel of cooked food, reduce the accumulation of scale in the steam generator 110, prolong the service life of the steam generator 110, and reduce the maintenance or repair frequency of the steam generator 110.

Furthermore, the amount of water for cooking in the steam rice cooker is strictly limited, and the first flow passage 210 and the second flow passage 220 are supplied with water from the same water tank 120, so that the risk of insufficient water supply for a user can be reduced, and water resources can be saved. If the first flow passage 210 and the second flow passage 220 are supplied with water through different water tanks, for example, the first flow passage 210 is supplied with water from the water tank 120 of the steam rice cooker, the second flow passage 220 is supplied with water from another water tank disposed in the water purification unit 300 itself, and when cooking is started, purified water passing through the second flow passage 220 is used for cooking, a situation that the water purification unit 300 cannot be used may occur in the cooking process, at this time, cooking is switched to raw water passing through the first flow passage 210, if the water in the water tank corresponding to the first flow passage 210 is insufficient, cooking cannot be completed by the steam rice cooker, and if the water in the water tank corresponding to the first flow passage 210 is sufficient, when the water purification unit 300 can be used normally all the time, waste of water resources in the water tank may be caused. It can be seen that the first runner 210 and the second runner 220 are supplied with water by the same water tank 120, so that the problem that the user cannot finish rice cooking due to insufficient water in a certain water tank can be avoided, the user is not required to ensure that the water in the plurality of water tanks has basic water volume, the trouble that the user adds water in the plurality of water tanks is avoided, and the waste of water resources is avoided.

In addition, when the water purification unit 300 is detachably connected to the machine body 100, the first flow passage 210 and the second flow passage 220 supply water through the same water tank 120, and an additional water tank is not required to be disposed on the water purification unit, so that the structure of the detachable water purification unit 300 can be simplified, and the docking is convenient.

Further, a cooking cavity for holding food is provided on the body 100, and the steam rice cooker includes a steam supply mode and a water adding mode. The steam supply mode is when the steam generator 110 supplies steam to the cooking cavity. When the steam generator 110 is not operated or is operated with a small power, the steam generator 110 supplies liquid water to the cooking cavity in a water adding mode. When the water purifying unit 300 is detachably coupled to the body 100, it is convenient to realize multi-functions of the steam rice cooker. For example, a sensor is provided on the body 100 to detect whether the water purifying unit 300 is mounted. When it is detected that the water purifying unit 300 is installed, the controller in the machine body 100 may complete the water adding mode or the steam supplying mode by controlling whether the steam generator 110 operates; when the water purification unit 300 is not installed, the controller controls the steam generator 110 not to work or to work only with low power, so as to limit the steam rice cooker to realize the water adding mode only, or when the current cooking program is completed preferentially and the steam rice cooker enters the steam supplying mode when the next cooking program needs to be completed, the user is prompted to install the water purification unit 300.

The water tank 120 may selectively communicate with the steam generator 110 through the first flow passage 210 or the second flow passage 220, which may satisfy different cooking scenarios. When the steam generator 110 is operated, water may pass through the water purification unit 300 to ensure that the steam generator 110 is not scaled; when the steam generator 110 does not work or works with small power, water can be added or heated to the cooking cavity through the first flow passage 210 by water flow, so that the loss of the water purifying unit 300 is reduced, and the water adding efficiency is improved.

As shown in fig. 3 to 4, the flow direction control valve 230 includes a three-way flow passage, three connection ports of the three-way flow passage are a water inlet channel 231, a raw water port 232 and a raw water joint 233, respectively, and the water inlet channel 231, the raw water port 232 and the raw water joint 233 are respectively communicated with the water tank 120, the second flow passage 220 and the first flow passage 210; a valve core 240 is movably disposed in the three-way flow passage to block the first flow passage 210 or the second flow passage 220. The flow direction of water flow is controlled by matching the three-way flow channel with the valve core 240, the structure is more compact, and the failure rate is reduced.

In other alternative embodiments, control valves may be disposed on the first flow channel 210 and the second flow channel 220 to control the flow of the first flow channel 210 and the second flow channel 220, respectively. For example, the flow direction control valve 230 includes a first solenoid valve and a second solenoid valve; the first electromagnetic valve is disposed corresponding to the first flow channel 210, and is used for controlling the opening or closing of the first flow channel 210; the second electromagnetic valve is disposed corresponding to the second flow passage 220, and is used for controlling the opening or closing of the second flow passage 220. The first solenoid valve controls the first flow passage 210 to be opened, and the second solenoid valve controls the second flow passage 220 to be opened, so that the water tank 120 is communicated with the steam generator 110 through the first flow passage 210, and water does not pass through the water purification unit 300; the first solenoid valve controls the second flow passage 220 to be closed, and the second solenoid valve controls the second flow passage 220 to be opened, so that the water tank 120 is communicated with the steam generator 110 through the second flow passage 220, and water flows through the water purifying unit 300.

As shown in fig. 2, a water purifying joint 250 is provided on the machine body 100, and the water purifying unit 300 is detachably connected to the water purifying joint 250; when the water purifying unit 300 is connected to the water purifying joint 250, the water purifying unit 300 is connected to the second flow path 220 in series. When the raw water in the water tank 120 enters the steam generator 110 without being filtered, the water tank 120 is communicated with the steam generator 110 through the first flow passage 210, and at this time, the water purification unit 300 can be detached and stored, or the water purification unit 300 can be used for other products which can pass through the water purification unit 300, so that the convenience of maintenance and repair of the water purification unit 300 is also improved.

In other alternative embodiments, the water purification unit 300 may also be integrated in the body 100. When the flow direction control valve 230 is a mechanical valve, a control switch may be provided to control the switching of the water flow path. When the flow direction control valve 230 is an electromagnetic valve, the switching of the water flow path may be controlled by a controller in the machine body 100.

As shown in fig. 2 and 6, a butt coupling structure 200 is disposed on the machine body 100, the butt coupling structure 200 includes a housing 260, the butt coupling structure 200 protrudes out of one side of the machine body 100, the water purifying joint 250 is disposed on the butt coupling structure 200, the flow direction control valve 230 is disposed in the housing 260, and the water purifying joint 250 is disposed upward. Therefore, the water purification unit 300 and the butt-joint coupling structure 200 can be applied with force downwards when being plugged, a corresponding table board support is arranged below the butt-joint coupling structure 200, a user does not need to raise hands to hold the machine body 100 when being plugged, and both hands of the user can be used for holding the water purification unit 300, so that the plugging can be carried out smoothly. In other alternative embodiments, the water purifying joint 250 may face to the side, but the water purifying unit 300 is inserted by hand, which is not beneficial to the alignment and insertion operations of the water purifying unit 300 and the water purifying joint 250.

As shown in fig. 2 and 5, the water purifying joint 250 includes a raw water interface 232 and a purified water interface 251, and the water purifying unit 300 is provided with a raw water inlet 310 and a purified water outlet 320 respectively connected with the raw water interface 232 and the purified water interface 251.

When the raw water inlet 310 is inserted into the raw water port 232, the raw water inlet 310 abuts against the valve element 240, one end of the valve element 240 close to the raw water port 232 is pressed, the valve element 240 blocks the raw water joint 233, the raw water port 232 is opened, so that the valve element 240 blocks the first flow passage 210, and the water tank 120 is communicated with the steam generator 110 through a second flow passage.

As shown in fig. 3, 4, and 9, the valve body 240 is provided with a first seal ring 241 and a second seal ring 242, the first seal ring 241 being used to block the raw water port 232, and the second seal ring 242 being used to block the raw water joint 233.

As shown in fig. 3, a return member 270 is disposed between the three-way flow passage and the valve core 240, when the raw water inlet 310 is separated from the raw water port 232, that is, when one end of the valve core 240 close to the raw water joint 233 is released, the valve core 240 blocks the raw water port 232 under the action of the return member 270, the raw water joint 233 is opened, that is, the return member 270 makes the valve core 240 block the second flow passage 220, and the water tank 120 is communicated with the steam generator 110 through the first flow passage 210. The return member 270 is a spring.

After the water purifying unit 300 is installed, the water tank 120 is automatically communicated with the steam generator 110 through the second flow passage 220, and after the water purifying unit 300 is disassembled, the water tank 120 is automatically communicated with the steam generator 110 through the first flow passage 210 without corresponding sensors, controllers or specific additional operation cooperation, thereby improving convenience and reliability of switching of the flow passages communicating the water tank 120 with the steam generator 110.

In other alternative embodiments, the flow direction control valve 230 having a three-way flow passage may also be a three-way solenoid valve, and the three-way solenoid valve is connected to a controller in the machine body 100, and a signal is sent to the controller whether to use the water purification unit 300 through a sensor or a user operation, so that the controller controls the three-way solenoid valve to switch the flow direction of the water.

As shown in fig. 5, an ejector 311 is disposed at the raw water inlet 310 of the water purification unit 300, and the ejector 311 is inserted into the raw water port 232 and abuts against the valve element 240. The valve core 240 is supported by the top rod 311, so that the influence of the side wall of the raw water inlet 310 on the flow rate of the valve core 240 can be avoided. In other alternative embodiments, the plunger 311 may not be provided, and the valve core 240 may be directly abutted by the sidewall of the raw water inlet 310.

As shown in fig. 3 to 4 and 9 to 10, a guide post 234 is provided on the flow direction control valve 230, the raw water port 232 is located on the guide post 234, the valve body 240 has a guide portion 243, the guide portion 243 extends into the raw water port 232, and a water flow passage 244 is provided on the guide portion 243. The guide posts 234 and the guide portions 243 are arranged, so that the movement of the valve core 240 is more stable, the deflection of the valve core 240 is avoided, and the failure risk of the valve core 240 is reduced.

As shown in fig. 10, the guide portion 243 has a plurality of flow guiding ribs 245 distributed along the circumferential direction of the guide portion 243, and a water flowing channel 244 is formed between the flow guiding ribs 245. The arrangement of the flow guide rib 245 ensures that the water flowing channel 244 is formed, meanwhile, the contact surface between the guide part 243 and the inner wall of the raw water interface 232 is reduced, the moving smoothness of the valve core 240 is improved, and the ejector rod 311 abuts against the middle part of the guide part 243, so that the flow of the water flowing channel 244 is not influenced. In other alternative embodiments, a flow guide middle hole extending along the axis of the guide portion 243 may be disposed in the middle of the guide portion 243, and the bottom of the flow guide middle hole is communicated with the outside of the guide portion 243 from the side wall of the guide portion 243 to form the water flowing channel 244, in this embodiment, the top bar 311 is preferably not disposed, and the side wall of the raw water inlet 310 directly abuts against the guide portion 243 to prevent the top bar 311 from blocking the flow guide middle hole.

An insertion groove 235 is formed in the flow direction control valve 230, a sealing ring 236 is formed on the inner wall of the insertion groove 235, that is, the sealing ring 236 is formed on the periphery of the raw water port 232, and the outer wall of the raw water inlet 310 is in sealing contact with the sealing ring 236. Thus, the sealing performance of the water purification unit 300 and the raw water port 232 after insertion can be improved. The upper end of the inner wall of the insertion groove 235 is provided with a limit groove, the outer side of the sealing ring 236 is provided with a limit ring 237, the limit ring 237 is embedded in the limit groove, and the shell 260 presses the sealing ring 236.

As shown in fig. 8 to 9, the flow direction control valve 230 includes a valve seat 238 and a valve body 239 detachably connected to each other, the raw water port 232 and the water inlet channel 231 are located on the valve body 239, and the raw water joint 233 is located on the valve seat 238. The detachable valve seat 238 and the valve body 239 facilitate the installation of the valve core 240, and the raw water joint 233 is positioned on the valve seat 238 to facilitate the adjustment of the relative positions of the raw water joint 233 and the water inlet channel 231 to adapt to different installation positions of the water tank 120 and the steam generator 110. The valve seat 238 and the valve body 239 are sealed by a seal 290.

The housing 260 is provided with a check valve 252 at the clean water port 251. In the case of detaching the water purifying unit 300, the check valve 252 may control the water purifying port 251 to be closed, so as to prevent external air from entering the steam generator 110, or prevent water vapor of the steam generator 110 from flowing out of the water purifying port 251.

As shown in fig. 1 and 5, a hidden groove 330 is provided on the water purification unit 300, and when the water purification unit 300 is connected to the water purification joint 250, the butt coupling structure 200 is inserted into the hidden groove 330. This facilitates the compactness of the overall shape of the water purification unit 300 and the machine body 100, and also reduces the accumulation of external oil smoke or dust at the water purification joint 250 to keep the water purification joint 250 clean.

As shown in fig. 2 and 11, the docking coupling structure 200 is slidably mounted on the machine body 100, the machine body 100 is provided with a receiving cavity corresponding to the docking coupling structure 200, and when the water purification unit 300 is detached from the docking coupling structure 200, the docking coupling structure 200 is received in the receiving cavity. When not using water purification unit 300 like this, just can accomodate butt joint coupling structure 200 in holding the chamber after dismantling water purification unit 300, reduce the outside irregular shape of organism 100, promote the aesthetic property, reduce steam cooking utensil occupation space, avoid water purification joint 250 to be contaminated. A pull tab slot 261 is also provided on the counter coupling structure 200, and the pull tab slot 261 facilitates pulling the counter coupling structure 200 out of the receiving cavity. In other alternative embodiments, the docking coupling structure 200 may also be rotatably connected to the machine body 100.

As shown in fig. 5 to 6, the water purifying unit 300 includes an RO cartridge and a purified water pump, a power board is provided in the machine body 100, and the purified water pump is coupled to the power board through an electric coupler 280; therefore, the water purifying pump does not need to be powered by an additional power supply or an additional controller to control the operation of the water purifying pump, and the control program can be integrated on a power panel of the steam cooking appliance. In other alternative embodiments, the water purification unit 300 may also employ a ceramic filter element, and the electric coupler 280 is not required to be disposed on the docking coupling structure 200.

Further, as shown in fig. 5 to 6, the water purification joint 250 further includes a waste water interface 253, the waste water interface 253 is communicated with the water tank 120, the water purification unit 300 includes a waste water outlet 340, the waste water outlet 340 is in butt joint with the waste water interface 253, and a one-way valve is disposed at the waste water interface 253. Need not special waste water collection unit like this, also need not to place steam cooking utensil near kitchen water drainage tank for steam cooking utensil's the position of placing can be more random, promote to use and experience, and waste water also can supply water tank 120 water yield to a certain extent, and the volume of water tank 120 can be done lessly like this, is favorable to the miniaturized design of product.

In the description of the present invention, it is to be understood that the terms "central," "lateral," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the figures, merely to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be understood by those skilled in the art that the embodiments of the present invention are described above, but the descriptions are only for the purpose of facilitating understanding of the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the embodiments of the invention as defined by the appended claims.

Claims (10)

1. A steam cooking appliance comprises a machine body, a steam generator and a water tank for supplying water to the steam generator are arranged on the machine body, and is characterized in that,

a first flow passage and a second flow passage are arranged between the water tank and the steam generator, and the second flow passage is connected with a water purification unit;

and a flow direction control valve is provided to communicate the water tank with the steam generator through the first flow passage or the second flow passage.

2. The steam cooking appliance of claim 1, wherein the flow direction control valve comprises a three-way flow passage, and three connection ports of the three-way flow passage are respectively communicated with the water tank, the first flow passage and the second flow passage;

a valve core is movably arranged in the three-way flow passage to block the first flow passage or the second flow passage.

3. The steam cooking appliance of claim 1, wherein the flow direction control valve comprises a first solenoid valve and a second solenoid valve;

the first electromagnetic valve is arranged corresponding to the first flow passage and used for controlling the opening or closing of the first flow passage;

the second electromagnetic valve is arranged corresponding to the second flow passage and used for controlling the opening or closing of the second flow passage.

4. The steam cooking appliance according to any one of claims 1 to 3, wherein a water purifying joint is provided on the machine body, and the water purifying unit is detachably connected to the water purifying joint;

when the water purification unit is connected with the water purification joint, the water purification unit is connected in series on the second flow passage.

5. The steam cooking appliance according to claim 2, wherein the body is provided with a water purifying joint, the water purifying joint comprises a raw water port and a water purifying port, and the water purifying unit is provided with a raw water inlet and a purified water outlet which are respectively butted with the raw water port and the water purifying port;

when the raw water inlet is inserted into the raw water interface, the raw water inlet props against the valve core, the valve core blocks the first flow passage, and the water tank is communicated with the steam generator through a second passage;

and a return piece is arranged between the three-way flow passage and the valve core, when the raw water inlet is separated from the raw water interface, the return piece enables the valve core to block the second flow passage, and the water tank is communicated with the steam generator through the first flow passage.

6. The steam cooking appliance as claimed in claim 5, wherein a plunger is provided at the raw water inlet of the water purification unit, a sealing ring is provided at the periphery of the raw water inlet, the outer wall of the raw water inlet is in sealing contact with the sealing ring, and the plunger is inserted into the raw water inlet and abuts against the valve core.

7. The steam rice cooker of any one of claims 1-3, wherein the body is provided with a butt-joint coupling structure, the butt-joint coupling structure protrudes out of one side of the body, the water purifying joint is positioned on the butt-joint coupling structure, and the water purifying joint is arranged upward.

8. The steam cooking appliance of claim 7, wherein the water purification unit is provided with a hidden slot, and when the water purification unit is connected with the water purification joint, the butt-joint coupling structure is embedded in the hidden slot.

9. The steam cooking appliance of claim 7, wherein the docking coupling structure is slidably or rotatably mounted on the body, the body is provided with a receiving cavity corresponding to the docking coupling structure, and the docking coupling structure is received in the receiving cavity when the water purifying unit is detached from the docking coupling structure.

10. The steam cooking appliance according to any one of claims 1 to 3, wherein the water purifying unit comprises an RO cartridge and a water purifying pump, a power supply board is arranged in the machine body, and the water purifying pump is coupled with the power supply board through an electric coupler;

the water purification connector comprises a raw water connector, a water purification connector and a wastewater connector, the wastewater connector is communicated with the water tank, the water purification unit comprises a wastewater outlet, the wastewater outlet is in butt joint with the wastewater connector, and the water purification connector and/or the wastewater connector are/is provided with a one-way valve.

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