CN215383145U - Steam cooking utensil - Google Patents

Abstract

The utility model discloses a steam cooking appliance, which comprises a base and a steam generator arranged in the base, wherein a purification device is also arranged in the base, the purification device comprises a shell with a filter chamber, and a raw water inlet, a waste water outlet and a purified water outlet which are respectively communicated with the filter chamber, and the purified water outlet is communicated with the steam generator; the flow path of interior edge liquid of filter chamber has set gradually one-level and has filtered piece and second grade and filter the piece, and the one-level is filtered the piece and is used for carrying out the one-level to the liquid that gets into from the raw water inlet and filter, and the second grade filters the piece and is used for carrying out the second grade to the liquid that the one-level filtered piece was filtered. The primary filter piece and the secondary filter piece are integrated in the filter cavity, so that primary filtration and secondary filtration are realized in the filter cavity by raw water, the number of the filter cavity is reduced, the volume of the purifying device is reduced, the purifying device can be integrated in the base of the steam cooking appliance, the water channel interface of the purifying device is reduced, and the water leakage risk is reduced.

Description

Steam cooking utensil

Technical Field

The utility model belongs to the technical field of kitchen utensils, and particularly relates to a steam cooking utensil.

Background

Compared with cooking appliances with traditional heating modes, steam cooking appliances (such as a steam rice cooker, a steam pressure cooker and the like) have the advantages of energy conservation, environmental protection, high efficiency, convenience, health, nutrition and the like, and are widely applied.

Steam cooking appliances generally feed water into a steam generator in a pot body and heat the water, and the water is heated and vaporized to generate steam, and then enters a cooking cavity to heat food.

However, since a large amount of calcium and magnesium ions are contained in municipal tap water in part of regions, in the process of heating and vaporizing, the calcium and magnesium ions and impurities in the water are separated out to generate scale, the scale is attached to the inner wall of a water pipe in the steam generator and is difficult to remove, and the water pipe is easily blocked after a long time, so that the water entering the steam generator is reduced, the generation efficiency of steam is influenced, the service life of the steam generator is greatly reduced, and the heating efficiency of the steam cooking appliance is reduced.

Some purifier in be provided with the two-stage purification filter core, after two successive times of two-stage purification filter core filter, can filter the impurity in the municipal administration water to obtain comparatively pure water, however, two-stage purification filter core in the current purifier are usually independent respectively, and this whole volume that just causes purifier is great, weight is heavier, and the pipeline is complicated, and this purification filter core that just makes to be difficult to with the purifier is applied to small-size household appliances such as steam cooking utensil.

In addition, have more attach fitting between the two-stage purification filter core, this also means increased the risk that the product leaked, if take place rivers and leak, then cause the flow efficiency of water to reduce in the steam cooking utensil easily, the water yield to steam generator supply is not enough, leads to steam generator dry combustion method, influences life, and makes steam cooking utensil's heating efficiency lower.

SUMMERY OF THE UTILITY MODEL

The present invention provides a steam cooking appliance to solve at least one of the above technical problems.

The technical scheme adopted by the utility model is as follows:

a steam cooking appliance comprises a base and a steam generator arranged in the base, wherein a purifying device is also arranged in the base and comprises an installing head and a shell which is connected with the installing head and is provided with a filter cavity, the installing head is provided with a raw water inlet, a waste water outlet and a purified water outlet which are respectively communicated with the filter cavity, and the purified water outlet is communicated with the steam generator; the flow path of liquid is followed in the filter chamber and has been set gradually one-level filter piece and second grade filter piece, one-level filter piece be used for right certainly the raw water inlet gets into the liquid carry out the one-level filtration, second grade filter piece be used for right the liquid after one-level filter piece filters carries out the second grade and filters.

The purifying device also comprises a first mounting head and a second mounting head, the first mounting head and the second mounting head are respectively positioned at two sides of the shell, the raw water inlet is arranged at the first mounting head, the purified water outlet and the waste water outlet are arranged at the second mounting head, the primary filtering piece and the secondary filtering piece are sequentially arranged along the axial direction of the filtering cavity, the primary filtering piece is close to the first mounting head, and the secondary filtering piece is close to the second mounting head; or the purification device also comprises a mounting head for mounting the shell, and the raw water inlet, the waste water outlet and the purified water outlet are all arranged on the mounting head; the primary filter piece is at least partially wound on the outer side of the secondary filter piece, or the secondary filter piece is at least partially wound on the outer side of the primary filter piece.

The purifying device also comprises an installation head used for installing the shell, the raw water inlet, the waste water outlet and the purified water outlet are all arranged on the installation head, the primary filter element and the secondary filter element are sequentially arranged along the axial direction of the filter cavity, and the primary filter element is positioned on one side far away from the installation head compared with the secondary filter element; the one-level filtering piece is internally provided with a flow passage, the second-level filtering piece is internally provided with a water purification passage, the water purification passage is communicated with the water purification outlet, and the water purification passage is internally provided with a backflow prevention baffle plate for preventing the liquid in the water purification passage from flowing to the flow passage.

The first-stage filter element has a first radial gap between the inner wall of the shell, the second-stage filter element has a second radial gap between the inner wall of the shell, and fluid sequentially flows through the second radial gap and the first radial gap to flow to the first-stage filter element.

The primary filter element and the secondary filter element are coaxially arranged, and the primary filter element and the secondary filter element are arranged at intervals along the axis direction so as to form an overflowing gap between the primary filter element and the secondary filter element; the periphery of the secondary filter piece is provided with a water-resisting piece, and the liquid flowing out of the flow passage penetrates through the flow passage gap to the secondary filter piece and enters the water purification passage after the secondary filter piece.

The first-stage filter piece and the second-stage filter piece are provided with a conversion piece therebetween, and the conversion piece is provided with a water passing opening communicated with the overflowing channel and the overflowing gap.

One side of the conversion piece facing the secondary filter piece is provided with a plurality of support ribs, and two adjacent support ribs are matched to form the overflowing gap.

The purification device also comprises a positioning piece, and one end of the primary filter piece, which is back to the secondary filter piece, is arranged on the positioning piece; the positioning piece is fixedly connected with the shell, or the positioning piece can be placed in the shell in a pick-and-place mode.

The casing is including the parcel is in the outer first casing of one-level filter piece, and the parcel is in the outer second casing of second grade filter piece, first casing with second casing detachably connects.

The filtering particle size of the first-stage filtering piece is larger than that of the second-stage filtering piece, the steam cooking appliance further comprises a supercharging device, the supercharging device is provided with a water outlet communicated with the raw water inlet, and the second-stage filtering piece is a reverse osmosis filtering piece.

Due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. the fluid passes through the purification device before entering the steam generator, and is subjected to two-stage filtration and purification in the purification device, so that the fluid entering the steam generator is pure water with less impurities, thereby reducing the generation of scale and avoiding the blockage of pipelines by the scale.

In addition, the primary filter member and the secondary filter member are integrated in the filter chamber, so that the primary and secondary filtration of the raw water is realized in the filter chamber, the number of filter chambers is reduced, and the volume of the purification device is reduced, so that the purification device can be integrated in the base of the steam cooking appliance. Moreover, the one-level filter piece with the second grade filter piece all set up in the filter chamber, reduced purifier's water route interface, and then reduced the risk of leaking, improved the reliability of steam cooking utensil work has enjoyed user experience.

2. As a preferred embodiment of the present invention, the purification apparatus further includes a first mounting head and a second mounting head, the first mounting head and the second mounting head are respectively located at two sides of the housing, the raw water inlet is disposed at the first mounting head, the purified water outlet and the waste water outlet are disposed at the second mounting head, the primary filter member and the secondary filter member are sequentially arranged along an axial direction of the filter chamber, the primary filter member is close to the first mounting head, and the secondary filter member is close to the second mounting head. Raw water by casing one side the raw water import gets into behind the filter chamber, successively pass through the one-level filter piece with the second grade filters piece, the water purification after the filtration is followed the casing opposite side the water purification export flows, has shortened the fluid and has been in flow path in the filter chamber has improved flow efficiency, and fluidic flow path is simple, has avoided leading to fluidic flow direction to be difficult to control because of the water route is complicated, takes place the turbulent flow.

3. As a preferred embodiment of the present invention, the purifying apparatus further includes a mounting head for mounting the housing, the raw water inlet, the waste water outlet, and the purified water outlet are disposed at the mounting head, the primary filter member and the secondary filter member are sequentially arranged along an axial direction of the filter cavity, and the primary filter member is located on a side away from the mounting head than the secondary filter member; the first-stage filtering piece is internally provided with a flow passage, the second-stage filtering piece is internally provided with a water purifying passage, and the water purifying passage is communicated with the water purifying outlet. The one-level filters and keeps away from the installation head has optimized arranging of filter intracavity water route makes the raw water from keeping away from the position infiltration of installation head extremely the one-level filters piece, water after the one-level filtration gets into in the passageway overflows, and permeate to the second grade filters piece, and the water purification after the secondary filtration is followed the water purification passageway flows, the fluid with the one-level filters piece with the second grade filters piece and takes place abundant contact filtration, and the filter effect is better, just the water purification passageway is located inside the second grade filters piece, it is located to overflow the passageway inside the one-level filters piece, rational utilization filter cavity structure has effectively reduced holistic volume, avoids seting up extra water route, leads to the volume increase.

4. In a preferred embodiment of the present invention, the primary filter element has a first radial gap with the inner wall of the housing, and the secondary filter element has a second radial gap with the inner wall of the housing, and the fluid flows through the second radial gap and the first radial gap in this order to flow toward the primary filter element. Raw water flows through the radial gap, and generates larger water pressure in the radial gap to accelerate the flow speed, and the flow speed of the water filtered by the filter element is attenuated, so that the generation speed of purified water is accelerated, and the sufficient supply amount of the purified water is ensured. When the steam cooking appliance works, purified water always enters the steam generator, so that the steam generator is prevented from being dried.

Further, the periphery of the secondary filter piece is provided with a water stop piece. The water stop piece enables raw water to flow according to an ideal flow path, namely the raw water sequentially flows through the second radial gap and the first radial gap and firstly permeates into the primary filter piece, so that the raw water is prevented from directly permeating into the secondary filter piece when flowing to the second radial gap.

5. In a preferred embodiment of the present invention, the housing includes a first housing wrapped around the primary filter element, and a second housing wrapped around the secondary filter element, the first housing being removably attached to the second housing. First casing with the connection can be dismantled to the second casing, makes and works as the one-level filter piece or the second grade filter piece need be changed or when clean, can with first casing with the second casing is dismantled, changes respectively or washs, and need not to change purifier's whole subassemblies have made things convenient for the loading and unloading of filtering the piece, and have reduced maintenance's cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a sectional view of the steam cooking appliance according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the purification apparatus according to an embodiment of the present invention, in which arrows indicate the flow direction of a fluid;

FIG. 3 is an enlarged view of area A of FIG. 2;

FIG. 4 is an exploded view of the purification apparatus in accordance with one embodiment of the present invention;

FIG. 5 is a schematic structural view of the converting element according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of the transition piece of FIG. 5;

fig. 7 is a schematic structural view of the steam cooking appliance according to another embodiment of the present invention.

Wherein:

1, a base; 11 a water tank;

2, a purification device; 21 a housing; 211 a first radial gap; 212 a second radial gap; 22 a filter chamber; 23 primary filter elements; 24 a secondary filter element; 25 mounting a head; 251 a raw water inlet; 252 a purified water outlet; 253 a waste water outlet; 26 a flow passage; 27 a water purification channel; 28 overcurrent gap; 29 anti-reflux baffle;

3 a conversion member; 31 annular limiting ribs; 32 support ribs; 33, a water outlet;

4, a water-resisting piece;

5, positioning parts; 51 annular positioning ribs.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it is to be understood that the terms "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

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; the connection can be mechanical connection, electrical connection or communication; 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.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the terms "implementation," "embodiment," "one embodiment," "example" or "specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 7, a steam cooking appliance includes a base 1 and a steam generator disposed in the base 1, a purifying device 2 is further disposed in the base 1, the purifying device 2 includes a housing 21 having a filter chamber 22, and a raw water inlet 251, a waste water outlet 253 and a purified water outlet 252 respectively communicated with the filter chamber 22, and the purified water outlet 252 is communicated with the steam generator; a primary filtering piece 23 and a secondary filtering piece 24 are sequentially arranged in the filtering cavity 22 along the flow path of the liquid, the primary filtering piece 23 is used for primary filtering of the liquid entering from the raw water inlet 251, and the secondary filtering piece 24 is used for secondary filtering of the liquid filtered by the primary filtering piece 23.

It should be noted that the "raw water" refers to unfiltered liquid, for example, it may be ordinary municipal tap water, the "waste water" refers to water blocked by the purification device 2 and having a high impurity concentration, and the "purified water" refers to water which is filtered by the purification device 2 and has less impurities and is relatively pure.

The fluid passes through the purification device 2 before entering the steam generator, and is subjected to two-stage filtration and purification in the purification device 2, so that the fluid entering the steam generator is pure water with less impurities, thereby reducing the generation of scale and avoiding the blockage of pipelines by the scale.

The primary filter member 23 and the secondary filter member 24 are integrated in the filter chamber 22, so that the primary and secondary filtration of the raw water is realized in the filter chamber 22, the number of filter chambers is reduced, and the volume of the purification apparatus 2 is reduced, so that the purification apparatus 2 can be integrated in the base 1 of the steam cooking appliance.

Moreover, the one-level filtration piece 23 with the second grade filtration piece 24 all set up in the filter chamber 22, reduced purifier 2's water route interface, and then reduced the risk of leaking, improved steam cooking utensil reliability of work has enjoyed user experience.

The present invention is not limited to the type of the primary filter member 23 and the secondary filter member 24, and as a specific example, the primary filter member 23 is a polyester fiber filter element (e.g., a PP cotton filter element) for performing primary filtration on raw water, and the secondary filter member 24 is a reverse osmosis filter member (e.g., an RO membrane) for performing reverse osmosis filtration on water filtered by the primary filter member 23 to realize fine filtration.

The present invention is not particularly limited to the positions of the primary filter member 23 and the secondary filter member 24, and includes, but is not limited to, the following embodiments:

the first implementation mode comprises the following steps: in this embodiment, the purifying device 2 further includes a first mounting head and a second mounting head, the first mounting head and the second mounting head are respectively located at two sides of the housing 21, the raw water inlet is disposed at the first mounting head, the purified water outlet and the waste water outlet are disposed at the second mounting head, the primary filtering member 23 and the secondary filtering member 24 are sequentially arranged along the axial direction of the filter cavity 22, the primary filtering member 23 is close to the first mounting head, and the secondary filtering member 24 is close to the second mounting head.

The primary filter member 23 is close to the first mounting head, when raw water enters the filter cavity 22 from the raw water inlet of the first mounting head, the raw water firstly permeates into the primary filter member 23, the water filtered by the primary filter member 23 continuously flows to the secondary filter member 24, the purified water filtered by the secondary filter member 24 flows out from the purified water outlet of the second mounting head, enters the steam generator and is heated and converted into steam, and the wastewater with higher impurity concentration blocked by the primary filter member 23 and the secondary filter member 24 is discharged from the wastewater outlet.

The primary filter element 23 and the secondary filter element 24 are arranged along the axis of the filter chamber 22, reducing the radial dimensions of the filter chamber 22, and thus reducing the overall dimensions of the purification device 2, saving internal space of the steam cooking appliance. And the first-stage filter element 23 and the second-stage filter element 24 are sequentially arranged on the flow path of the fluid in the filter cavity 22, so that the water path is simple, the flow path of the fluid is short, the flow efficiency of the fluid is improved, the production efficiency of purified water is improved, the purified water outlet and the raw water inlet are positioned on two sides of the shell 21, namely, the flow direction of the fluid always flows from one side to the other side of the shell 21, the flow direction of the fluid is prevented from generating large corners, the flow speed of the fluid is reduced, and turbulence occurs.

It should be noted that the term "two sides of the housing 21" should be interpreted broadly, that is, the first mounting head and the second mounting head may be disposed on two opposite sides of the housing 21 (such as upper and lower sides, left and right sides, or front and rear sides, which are distinguished according to the placement angle of the purifying device 2), or may be disposed on two non-corresponding sides of the housing 21, for example, the first mounting head is disposed on the upper side of the housing disposed near the primary filter member 23, and the second mounting head is disposed on the left side of the housing disposed near the secondary filter member 24. As long as satisfy the assembly back, the one-level filter piece 23 is corresponding to be set up in the position of being close to first installation head, the second level filter piece 24 is set up in the position of being close to second installation head, can make things convenient for the inflow of raw water and the outflow of water purification and waste water.

In addition, the phrase "the primary filter member 23 and the secondary filter member 24 are sequentially arranged along the axial direction of the filter cavity 22" means that, when the axial line of the housing 21 is a single straight line (without bending), the primary filter member 23 and the secondary filter member 24 are coaxially arranged, and when the housing 21 is irregular and the axial line thereof has a certain bending angle, the primary filter member 23 and the secondary filter member 24 are sequentially arranged along the length direction of the axial line, and at this time, the axial line of the primary filter member 23 does not coincide with the axial line of the secondary filter member 24.

The second embodiment: in this embodiment, the purification device 2 further includes a mounting head for mounting the housing 21, and the raw water inlet, the waste water outlet and the purified water outlet are disposed at the mounting head; the primary filter member 23 is at least partially wound around the outside of the secondary filter member 24, or the secondary filter member 24 is at least partially wound around the outside of the primary filter member 23.

As a specific example of this embodiment, the primary filter element 23 is wound around the secondary filter element 24, so as to reduce the axial size of the filter chamber 22, thereby reducing the overall size of the purification device 2 and saving the internal space of the steam cooking appliance. Raw water enters the filter cavity 22 through the raw water inlet, flows into a gap between the primary filter member 23 and the shell 21, permeates into the primary filter member 23, flows out along the radial direction of the filter cavity 22 after being filtered by the primary filter member 23, permeates into the secondary filter member 24, and completes secondary filtration. Preferably, a purified water passage communicating with the purified water outlet is provided in the secondary filter member 24, and the purified water flowing out of the secondary filter member 24 flows out of the purified water outlet through the purified water passage.

Of course, when the secondary filter member 24 is wound around the outer side of the primary filter member 23, the fluid entering the filter chamber 22 sequentially permeates from the inside to the outside into the primary filter member 23 and the secondary filter member 24, thereby performing secondary filtration, and flows out from the purified water outlet.

The third embodiment is as follows: in the present embodiment, as shown in fig. 2 to 4, the purifying device 2 further includes a mounting head 25 for mounting the housing 21, the raw water inlet 251, the waste water outlet 253 and the purified water outlet 252 are all provided on the mounting head 25, the primary filter member 23 and the secondary filter member 24 are arranged in sequence along the axial direction of the filter chamber 22, and the primary filter member 23 is located on the side away from the mounting head 25 compared with the secondary filter member 24; be equipped with in the primary filter piece 23 and overflow passageway 26, be equipped with water purification passageway 27 in the secondary filter piece 24, water purification passageway 27 with water purification export 252 intercommunication.

The one-level is filtered 24 and is kept away from installation head 25 has optimized arranging of water route in the filter chamber 22 makes the raw water from keeping away from installation head 25's position infiltration extremely the one-level filters piece 23, and water after the one-level filtration gets into in the passageway 26 overflows, and the infiltration extremely the second grade filters piece 24, and the clean water after the secondary filtration is followed water purification passageway 27 flows out, fluid with the one-level filter piece 23 with the second grade filters piece 24 and takes place abundant contact filtration, and the filter effect is better, just water purification passageway 27 is located inside the second grade filters piece 24, it is located to overflow passageway 26 inside the one-level filters piece 23, rational utilization the inner space of filter chamber 22 has effectively reduced holistic volume, avoids seting up extra water route, leads to the volume increase.

In this embodiment, the primary filter element 23 may be disposed on a side close to the mounting head 25, and the secondary filter element 24 may be disposed on a side away from the mounting head 25, so as to shorten the flow path of the fluid and increase the flow speed.

Further, as shown in fig. 2 to 3, a backflow preventing baffle 29 for preventing the liquid in the water purifying channel 27 from flowing to the overflow channel 26 is disposed in the water purifying channel 27.

The backflow prevention baffle 29 prevents the purified water in the purified water channel 27 from flowing back into the overflow channel 26, and ensures the outflow efficiency of the purified water.

As a specific example of the present embodiment, the backflow-preventing baffle 29 is a one-way conduction structure such as a one-way valve, so that fluid can only flow from the overflow channel 26 to the water purification channel 27, and backflow of purified water to the overflow channel 26 is prevented.

As another specific example of the present embodiment, the backflow-preventing baffle 29 is a closed structure to close the water purifying channel 27, so that the portion of the water purifying channel 27 below the backflow-preventing baffle 29 is separated from the portion above the backflow-preventing baffle 29, thereby preventing raw water which is not filtered below from entering the upper portion of the water purifying channel 27 and then flowing out from the water purifying outlet 252, which affects the purifying effect of the purifying apparatus.

Further, as shown in fig. 2-3, the primary filter element 23 has a first radial gap 211 with the inner wall of the housing 21, and the secondary filter element 24 has a second radial gap 212 with the inner wall of the housing 21, and fluid flows through the second radial gap 212 and the first radial gap 211 in sequence to flow toward the primary filter element 23.

The raw water flows through the first radial gap 211 and the second radial gap 212, and generates a large water pressure in the first radial gap 211 and the second radial gap 212 to accelerate the flow rate, and the flow rate of the water filtered by the primary filter member 23 and the secondary filter member 24 is attenuated, so that the generation rate of the purified water is accelerated, and the supply of the purified water is ensured to be sufficient. When the steam cooking appliance works, purified water always enters the steam generator, so that the steam generator is prevented from being dried.

In addition, raw water gradually permeates and filters from the second radial gap 212 and the first radial gap 211 to the center of the filter cavity 22, so that the fluid and the primary filter piece 23 and the secondary filter piece 24 are in full contact and permeation, the filtering effect is improved, the water path arrangement is reasonable, an additional water path structure is not required to be arranged, and the occupied space of the purifying device 2 is reduced.

It should be noted that the direction of the raw water permeating into the primary filter member 23 is not particularly limited, and may be one of the following embodiments:

example 1: in this embodiment, when the raw water flows into the first radial gap 211, the raw water directly penetrates into the water passage in the primary filter member 23 along the radial direction of the primary filter member 23, so as to shorten the flow path of the raw water, so that the raw water can penetrate into the primary filter member 23 as early as possible, thereby improving the purification efficiency.

Example 2: in this embodiment, when the raw water flows to the first radial gap 211, the raw water continues to flow to the end away from the mounting head 25 until the raw water flows to the end of the primary filter member 23, then permeates into the primary filter member 23 along the axial direction of the primary filter member 23 and finally permeates into the water passage in the primary filter member 23, so as to improve the filtering effect of the primary filter member 23 on the raw water.

Example 3: in the present embodiment, when the raw water flows to the first radial gap 211, a part of the raw water permeates into the water passage in the primary filter member 23 in the radial direction of the primary filter member 23, and another part of the raw water flows to the end of the primary filter member 23 and permeates into the primary filter member 23 in the axial direction of the primary filter member 23, so that the raw water can permeate into the primary filter member 23 from all directions of the outer periphery of the primary filter member 23, thereby improving the efficiency of primary filtration and preventing the raw water from accumulating in the first radial gap 211 or the end of the primary filter member 23.

As a preferred example of this embodiment, as shown in fig. 2 to 4, the primary filter member 23 and the secondary filter member 24 are coaxially arranged, and the primary filter member 23 and the secondary filter member 24 are arranged at a distance from each other in the axial direction so as to form a flow gap 28 between the primary filter member 23 and the secondary filter member 24; the periphery of the secondary filter member 24 is provided with a water stop member 4, and liquid flowing out from the flow passage 26 permeates into the secondary filter member 24 through the flow gap 28 and enters the water purification passage 27 after passing through the secondary filter member 24.

The water stop 4 allows the raw water to flow along a desired flow path, i.e., to flow through the second radial gap 212 into the first radial gap 211, and to first penetrate into the primary filter member 23, thereby preventing the raw water from directly penetrating into the secondary filter member 24 when flowing into the second radial gap 212.

Preferably, the water-stop piece 4 is a water-stop film, the periphery of the secondary filter piece 24 is coated by the water-stop film, the water-stop film is thin, and the radial occupied space of the shell 21 is small, so that the overall miniaturization is facilitated.

It should be noted that the "outer periphery" is the side of the secondary filter element 24 facing the second radial gap 212.

The water filtered by the primary filter element 23 enters the overflowing gap 28 through the overflowing channel 26, and permeates into the secondary filter element 24 along the axial direction of the secondary filter element 24 in the overflowing gap 28, so that the filtering effect of the secondary filter element 24 on the fluid is improved.

Further, as shown in fig. 2 to 6, a conversion element 3 is disposed between the primary filter element 23 and the secondary filter element 24, and the conversion element 3 is provided with a water passing opening 33 communicating the passing channel 26 and the passing gap 28.

The water gap 33 makes the water filtered by the primary filter element 23 flow into the water gap 28, and the converter 3 can assist in fixing the primary filter element 23 and the secondary filter element 24, so that the primary filter element 23 and the secondary filter element 24 are more stable and avoid deformation.

Preferably, as shown in fig. 2 to 6, the primary filter member 23 and the secondary filter member 24 are both of a flexible structure, and the periphery of the conversion member 3 is provided with an annular limiting rib 31, and the annular limiting rib 31 is in interference fit with the outer surfaces of the primary filter member 23 and the secondary filter member 24, so that the primary filter member 23 and the secondary filter member 24 are more firmly mounted, and the primary filter member 23 and the secondary filter member 24 are prevented from being deformed by being pressed, and the first radial gap 211 and the second radial gap 212 are prevented from being blocked. In addition, the annular limiting rib 31 can also seal the opposite ends of the primary filter element 23 and the secondary filter element 24, so that raw water is prevented from directly flowing into the overflowing gap 28 without being filtered by the primary filter element 23, and the filtering and purifying effects are ensured.

Furthermore, as shown in fig. 2-3 and 5-6, a plurality of support ribs 32 are disposed on a side of the conversion member 3 facing the secondary filter member 24, and two adjacent support ribs 32 cooperate to form the flow passing gap 28.

The support ribs 32 can lift the secondary filter element 24, so that the overflowing gap 28 is large, more water can permeate into the secondary filter element 24 from the overflowing gap, and the purification effect and the purification efficiency are improved.

Preferably, as shown in fig. 5, the support ribs 32 are radially distributed along the center of the conversion member 3.

As a preferred embodiment of the present invention, as shown in fig. 2 and 4, the purifying device 2 further includes a positioning member 5, and an end of the primary filter member 23 facing away from the secondary filter member 24 is mounted on the positioning member 5.

Further, as shown in fig. 4, the positioning member 5 is further provided with an annular positioning rib 51 on the outer periphery thereof.

In the present embodiment, the primary filter element 23 is of a flexible construction. Since the primary filter member 23 is soft, it is easily deformed by being pressed, and the first radial gap 211 is blocked. Setting element 5's setting, it is convenient on the one hand the assembly of one-level filter piece 23, just annular location muscle 51 can also be right the deformation of one-level filter piece 23 is spacing, guarantees the size of first radial gap 211 is in the within range of ideal, and keeps unobstructed. In addition, the setting element 5 can also be right the one-level filter piece 23 is fixed a position, prevents that it from receiving the extrusion and taking place deformation to changed the flow direction of raw water around the one-level filter piece 23 influences the filter effect.

It should be noted that, the assembly manner of the positioning element 5 and the housing 21 is not specifically limited, and may be one of the following embodiments:

example 1: in this embodiment, the positioning element 5 is fixedly connected to the housing 21.

The setting element 5 can through with casing 21 integrated into one piece to reduce the assembly degree of difficulty, improve assembly efficiency, also can with casing components of a whole that can function independently shaping, and link firmly through modes such as welding, cementing. Of course, the housing 21 may also be fixedly connected to the base body by a detachable connection manner such as a screw connection, a snap connection, and the like, which is not limited herein.

Example 2: in this embodiment, the positioning element 5 is disposed in the housing 21 in a removable manner.

In this embodiment, the positioning element 5 is disposed in the housing 21, and there is no connection relationship between the positioning element and the housing 21, so that the assembly of the positioning element 5 is facilitated, and the productivity is further improved.

In a preferred embodiment of the present invention, the housing 21 includes a first housing wrapped around the primary filter element 23, and a second housing wrapped around the secondary filter element 24, the first housing being removably attached to the second housing.

The one-level is filtered 23 and is being in first casing, the second grade is filtered 24 and is being in the second casing, has made things convenient for the one-level filter 23 with the assembly of second grade filter 24 has reduced the assembly degree of difficulty. Moreover, when the primary filter element 23 or the secondary filter element 24 needs to be replaced or cleaned, the first housing and the second housing can be detached and replaced or cleaned separately, so that the maintenance cost is saved, and the user experience is enjoyed.

This embodiment is not particularly limited to the connection between the primary filter member 23 and the first housing and between the secondary filter member 24 and the second housing, and the primary filter member 23 may be detachably connected to the first housing, and similarly, the secondary filter member 24 may be detachably connected to the second housing, and when it is replaced, only the primary filter member 23 or the secondary filter member 24 is taken out from the corresponding housing and replaced. Of course, the present invention is not limited to the manner of replacing the filter elements of the purification device, and as mentioned above, in the case that the primary filter element 23 and the secondary filter element 24 are accessible from the housing 21, only the primary filter element 23 and/or the secondary filter element 24 may be replaced, depending on the application; as an alternative, the housing 21 can be replaced simultaneously with the mounting head 25, i.e. with its corresponding housing, when the primary filter element 23 or the secondary filter element 24 is replaced.

In a preferred embodiment of the present invention, the primary filter member 23 has a filtering particle size larger than that of the secondary filter member 24, the steam cooking appliance further includes a pressurizing means having a water outlet communicating with the raw water inlet 251, and the secondary filter member 24 is a reverse osmosis filter member.

The primary filter member 23 is used for primary filtration of raw water, and the secondary filter member 24 is used for reverse osmosis filtration of water filtered by the primary filter member 23 so as to realize fine filtration and improve the purification effect of fluid.

The pressurizing device further increases the water pressure of the raw water entering the purification device 2, thereby increasing the flow speed of the raw water. Through pressure boost device with reverse osmosis filters's cooperation utilizes reverse osmosis technique, makes the hydrone can pass through reverse osmosis filters, and inorganic salt, heavy metal ion, organic matter, colloid, bacterium, virus in the former aquatic impurity can't pass through reverse osmosis filters to the messenger can see through the water purification and can't see through the waste water strict distinction come.

Preferably, the steam cooking appliance further comprises a water tank 11, the purifying device 2 further comprises a first branch and a second branch, one end of the first branch is communicated with the purified water outlet 252, the other end of the first branch is communicated with the steam generator, one end of the second branch is communicated with the purified water outlet 252, and the other end of the second branch is communicated with the pressure boosting device or the water tank 11.

In order to ensure that the purifying device 2 produces sufficient purified water and avoid the steam generator to dry, the purified water quantity produced by the purifying device 2 needs to be larger than the water consumption of the steam generator, so that if the purified water produced by the purifying device 2 cannot be completely consumed for a long time, the water pressure between the purifying device 2 and the steam generator is too high, and the second branch is arranged to guide redundant purified water into the front end of the supercharging device so as to be recycled for the second time.

The purified water which flows back to the supercharging device has a certain pressure, so that the returned purified water can be preferentially used, the water at the front end of the purifying device 2 is neutralized and optimized, the water quality is obviously improved, impurities in the water are reduced, the service life of the primary filter element 23 and the secondary filter element 24 in the purifying device 2 is prolonged, and the reliability and the service life of the whole machine are improved.

It should be noted that the structure of the steam cooking appliance is not specifically limited, and the steam cooking appliance may be a built-in structure of a pot as shown in fig. 1, that is, the steam cooking appliance has a cooking cavity, and the pot is placed in the cooking cavity, or may be an external structure of a pot as shown in fig. 7, that is, the steam cooking appliance has an open cooking area, and the pot is placed in the cooking area.

The method can be realized by adopting or referring to the prior art in places which are not described in the utility model.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A steam cooking appliance comprises a base and a steam generator arranged in the base, and is characterized in that a purifying device is also arranged in the base, the purifying device comprises a shell with a filter chamber, and a raw water inlet, a waste water outlet and a purified water outlet which are respectively communicated with the filter chamber, and the purified water outlet is communicated with the steam generator;

the flow path of liquid is followed in the filter chamber and has been set gradually one-level filter piece and second grade filter piece, one-level filter piece be used for right certainly the raw water inlet gets into the liquid carry out the one-level filtration, second grade filter piece be used for right the liquid after one-level filter piece filters carries out the second grade and filters.

2. Steam cooking appliance according to claim 1,

the purifying device also comprises a first mounting head and a second mounting head, the first mounting head and the second mounting head are respectively positioned at two sides of the shell, the raw water inlet is arranged at the first mounting head, the purified water outlet and the waste water outlet are arranged at the second mounting head, the primary filtering piece and the secondary filtering piece are sequentially arranged along the axial direction of the filtering cavity, the primary filtering piece is close to the first mounting head, and the secondary filtering piece is close to the second mounting head; alternatively, the first and second electrodes may be,

the purification device also comprises a mounting head for mounting the shell, and the raw water inlet, the waste water outlet and the purified water outlet are all arranged on the mounting head; the primary filter piece is at least partially wound on the outer side of the secondary filter piece, or the secondary filter piece is at least partially wound on the outer side of the primary filter piece.

3. Steam cooking appliance according to claim 1,

the purifying device also comprises an installation head used for installing the shell, the raw water inlet, the waste water outlet and the purified water outlet are all arranged on the installation head, the primary filter element and the secondary filter element are sequentially arranged along the axial direction of the filter cavity, and the primary filter element is positioned on one side far away from the installation head compared with the secondary filter element; the one-level filtering piece is internally provided with a flow passage, the second-level filtering piece is internally provided with a water purification passage, the water purification passage is communicated with the water purification outlet, and the water purification passage is internally provided with a backflow prevention baffle plate for preventing the liquid in the water purification passage from flowing to the flow passage.

4. Steam cooking appliance according to claim 3,

the first-stage filter element has a first radial gap between the inner wall of the shell, the second-stage filter element has a second radial gap between the inner wall of the shell, and fluid sequentially flows through the second radial gap and the first radial gap to flow to the first-stage filter element.

5. Steam cooking appliance according to claim 4,

the primary filter element and the secondary filter element are coaxially arranged, and the primary filter element and the secondary filter element are arranged at intervals along the axis direction so as to form an overflowing gap between the primary filter element and the secondary filter element; the periphery of the secondary filter piece is provided with a water-resisting piece, and the liquid flowing out of the flow passage penetrates through the flow passage gap to the secondary filter piece and enters the water purification passage after the secondary filter piece.

6. Steam cooking appliance according to claim 5,

the first-stage filter piece and the second-stage filter piece are provided with a conversion piece therebetween, and the conversion piece is provided with a water passing opening communicated with the overflowing channel and the overflowing gap.

7. Steam cooking appliance according to claim 6,

one side of the conversion piece facing the secondary filter piece is provided with a plurality of support ribs, and two adjacent support ribs are matched to form the overflowing gap.

8. Steam cooking appliance according to claim 1,

the purification device also comprises a positioning piece, and one end of the primary filter piece, which is back to the secondary filter piece, is arranged on the positioning piece; the positioning piece is fixedly connected with the shell, or the positioning piece can be placed in the shell in a pick-and-place mode.

9. Steam cooking appliance according to any of claims 1 to 8,

the casing is including the parcel is in the outer first casing of one-level filter piece, and the parcel is in the outer second casing of second grade filter piece, first casing with second casing detachably connects.

10. The steam cooking appliance according to any one of claims 1 to 8,

the filtering particle size of the first-stage filtering piece is larger than that of the second-stage filtering piece, the steam cooking appliance further comprises a supercharging device, the supercharging device is provided with a water outlet communicated with the raw water inlet, and the second-stage filtering piece is a reverse osmosis filtering piece.

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