CN220453734U - Kitchen range - Google Patents
Kitchen range Download PDFInfo
- Publication number
- CN220453734U CN220453734U CN202322106052.4U CN202322106052U CN220453734U CN 220453734 U CN220453734 U CN 220453734U CN 202322106052 U CN202322106052 U CN 202322106052U CN 220453734 U CN220453734 U CN 220453734U
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- Prior art keywords
- air inlet
- air
- air outlet
- bottom shell
- head
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- 230000000712 assembly Effects 0.000 claims abstract description 26
- 238000000429 assembly Methods 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000010411 cooking Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 10
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 21
- 239000002737 fuel gas Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Gas Burners (AREA)
Abstract
The embodiment of the utility model provides a kitchen range. The kitchen range comprises an air inlet main pipe, at least two burner assemblies and a flow dividing piece, wherein the flow dividing piece is provided with an air inlet channel and at least two air outlet channels, and the at least two air outlet channels are respectively communicated with the air inlet channels; the air inlet channels are communicated with the air inlet header pipe, and the at least two burner assemblies are communicated with the at least two air outlet channels in a one-to-one correspondence mode. According to the kitchen range provided by the embodiment of the utility model, the flow dividing piece is arranged, the air inlet channel on the flow dividing piece is communicated with the air inlet main pipe, and the at least two burner assemblies are respectively communicated with the at least two air outlet channels on the flow dividing piece in a one-to-one correspondence manner, so that the at least two burner assemblies are connected at the same position of the air inlet main pipe, and the air inlet pressure balance of each burner assembly is realized. In this way, the gas injection flow rates of the individual burner assemblies can be kept uniform, so that the combustion state can be kept uniform.
Description
Technical Field
The utility model relates to the technical field of kitchen appliances, in particular to a kitchen range.
Background
With the increasing demands of people on life quality, cookers have become essential living goods basically.
In order to improve cooking efficiency, existing cooktops are typically provided with an intake manifold and a plurality of burner assemblies, each connected to the intake manifold. In this way, the combustion gases may pass through the intake manifold and then into the various burner assemblies, respectively, for combustion.
However, the connection between the plurality of burner assemblies and the intake manifold is as follows: the same air inlet main pipe is shared, the connection points of the plurality of burner assemblies and the air inlet main pipe are sequentially distributed along the air conveying direction of the air inlet main pipe, and as the pressure of fuel gas in the air inlet main pipe is reduced along the air conveying direction of the air inlet main pipe, the pressure in different positions of the air inlet main pipe is different, the pressure distribution in the air inlet main pipe is easy to generate an unbalanced phenomenon, and the air inlet pressure entering each burner assembly is greatly different. The gas discharge flow rate of the burner assembly is easily changed, thereby affecting the ability to inject primary air. In this way, the flame condition of each burner assembly is susceptible to change, thereby directly affecting the condition and/or thermal efficiency of the flue gas, and the stability of combustion is poor.
Disclosure of Invention
In order to at least partially solve the problems in the prior art, embodiments of the present utility model provide a cooktop. The kitchen range comprises an air inlet main pipe, at least two burner assemblies and a flow dividing piece, wherein the flow dividing piece is provided with an air inlet channel and at least two air outlet channels, and the at least two air outlet channels are respectively communicated with the air inlet channels; the air inlet channels are communicated with the air inlet header pipe, and the at least two burner assemblies are communicated with the at least two air outlet channels in a one-to-one correspondence mode.
According to the kitchen range provided by the embodiment of the utility model, the flow dividing piece is arranged, the air inlet channel on the flow dividing piece is communicated with the air inlet main pipe, and the at least two burner assemblies are respectively communicated with the at least two air outlet channels on the flow dividing piece in a one-to-one correspondence manner, so that the at least two burner assemblies are connected at the same position of the air inlet main pipe, and the air inlet pressure balance of each burner assembly is realized. In this way, the gas injection flow rates of the individual burner assemblies can be kept uniform, so that the combustion state can be kept uniform. By the arrangement, deviation of the smoke state and/or the thermal efficiency of each burner assembly can be avoided, and accordingly good combustion stability can be ensured. Therefore, the stability of the kitchen range is better.
Illustratively, the flow divider includes a connecting portion provided with a connection mating portion on the intake manifold, the connecting portion being threadably connected to the connection mating portion. In this way, the splitter may be threadably connected to the intake manifold. So set up, the reposition of redundant personnel piece is higher with intake manifold's joint strength. And the tightness between the flow dividing piece and the air inlet main pipe is good, so that the risk of air leakage can be prevented.
The flow divider further comprises a head portion having an end face and a side face, the connecting portion protruding from the end face, the air inlet passage extending into the head portion from an end of the connecting portion remote from the head portion, the air outlet passage extending into the head portion from the side face in communication with the air inlet passage. The structure of the flow dividing piece is simple, and the flow dividing piece is convenient to process and manufacture.
Illustratively, the burner assembly comprises a regulating valve and a burner main body, wherein the regulating valve is provided with an air inlet and an air outlet, the air inlet is connected with an air inlet branch pipe, one end of the air inlet branch pipe, which is far away from the air inlet, is connected to an air outlet channel, the air outlet is connected with an air pipe, and one end of the air pipe, which is far away from the air outlet, is connected to the burner main body. After passing through the air outlet channel, the fuel gas can sequentially pass through the air inlet branch pipe, the regulating valve and the air delivery pipe, so that the fuel gas can enter the combustor main body for combustion. The structure of the burner assembly is simple, and the manufacturing cost of the kitchen range is low.
Illustratively, the cross-sectional flow area of the inlet manifold is less than the cross-sectional flow area of the inlet manifold. Since the gas is split after passing through the splitter, the flow rate of the gas passing through one of the intake branches may be smaller than the flow rate of the gas passing through the intake manifold. Therefore, the flow cross section area of the air inlet branch pipe can be properly reduced, so that the consumable material can be reduced, and the manufacturing cost of the kitchen range can be further reduced.
Illustratively, the air outlet channel is formed with an internal thread section, and an end of the air inlet branch pipe, which is far away from the air inlet, is provided with an external thread section, and the external thread section is connected with the internal thread section. In this way, the inlet manifold may be screwed to the splitter. So set up, the air inlet is in charge of and the junction strength of reposition of redundant personnel spare is higher. And the tightness between the air inlet branch pipe and the flow dividing piece is good, so that the risk of air leakage can be prevented.
The cooktop also includes a bottom shell, at least a portion of the flow divider being located above the bottom shell, and the intake manifold being located below the bottom shell. So set up, intake manifold can not receive the drain pan influence to can be convenient for be connected with the gas source.
The air inlet main pipe is provided with a pipe joint, the connecting matching part is a threaded hole formed in the pipe joint, the connecting part is configured as a stud, and the stud vertically penetrates through the bottom shell from the upper side of the bottom shell downwards and then is connected to the threaded hole. So set up, the reposition of redundant personnel piece is higher with intake manifold's joint strength. And the tightness between the flow dividing piece and the air inlet main pipe is good, so that the risk of air leakage can be prevented.
Illustratively, the cooktop further includes a bottom shell, the head and bottom shell being connected by fasteners. Thus, the head and the bottom shell can be relatively fixed, and the kitchen range has better stability.
Illustratively, the head portion is provided with a threaded hole extending from the end surface in a direction parallel to the intake passage, and the bottom case is provided with a connecting hole corresponding to the threaded hole, through which the fastener is connected to the threaded hole. So set up, joint strength between head and the drain pan is higher to be convenient for connect and dismantle.
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
Advantages and features of the utility model are described in detail below with reference to the accompanying drawings.
Drawings
The following drawings are included to provide an understanding of the utility model and are incorporated in and constitute a part of this specification. Embodiments of the present utility model and their description are shown in the drawings to explain the principles of the utility model. In the drawings of which there are shown,
FIG. 1 is an internal block diagram of a cooktop according to an exemplary embodiment of the present utility model;
FIG. 2 is an exploded view of the cooktop shown in FIG. 1;
FIG. 3 is a perspective view of the splitter shown in FIG. 1;
FIG. 4 is a bottom view of the splitter shown in FIG. 3;
FIG. 5 is a cross-sectional view A-A of the splitter shown in FIG. 4;
FIG. 6 is a B-B cross-sectional view of the splitter shown in FIG. 4; and
fig. 7 is a gas trend schematic of the hob shown in fig. 1, wherein the arrows schematically show the trend of the gas.
Wherein the above figures include the following reference numerals:
100. an intake manifold; 110. a connection mating portion; 120. a pipe joint; 200. a burner assembly; 201. a first burner assembly; 202. a second burner assembly; 203. a third burner assembly; 210. a regulating valve; 220. a burner body; 230. an air inlet branch pipe; 240. a gas pipe; 300. a shunt; 310. an air intake passage; 320. an air outlet channel; 321. a first outlet channel; 322. a second outlet channel; 323. a third outlet channel; 324. an internal thread segment; 330. a connection part; 340. a head; 341. an end face; 342. a side surface; 343. a threaded hole; 400. and a bottom shell.
Detailed Description
In the following description, numerous details are provided to provide a thorough understanding of the utility model. However, it will be understood by those skilled in the art that the following description illustrates preferred embodiments of the utility model by way of example only and that the utility model may be practiced without one or more of these details. Furthermore, some technical features that are known in the art have not been described in detail in order to avoid obscuring the utility model.
The embodiment of the utility model provides a kitchen range. The cooktop includes, but is not limited to, a gas cooker or a natural gas cooker. The cooktop of the embodiment of the present utility model will be described in detail below with reference to the drawings.
As shown in fig. 1-6, the cooktop may include an intake manifold 100, a burner assembly 200, and a splitter 300.
Intake manifold 100 may be adapted to be connected to a fuel gas source such as a fuel gas storage tank or municipal fuel gas line. Thus, the gas source can supply gas. The gas may enter the cooktop through the intake manifold 100. The fuel gas can be coal gas or natural gas and the like according to different stoves.
The number of burner assemblies 200 may be at least two, for example, two, three, or more. The structure of the different burner assemblies 200 may be the same or different. The burner assembly 200 may be arranged in a straight line or in any other suitable form. In the embodiment shown in the figures, the burner assembly 200 may include a first burner assembly 201, a second burner assembly 202, and a third burner assembly 203. The second burner assembly 202 may be located between the first burner assembly 201 and the third burner assembly 203 in the left-right direction of the cooktop.
The splitter 300 may be connected between the intake manifold 100 and a plurality of burner assemblies 200. The splitter 300 may have an inlet channel 310 and at least two outlet channels 320 disposed thereon. At least two outlet channels 320 may be respectively in communication with the inlet channels 310. Intake manifold 100 may be in communication with an intake passage 310. The number of outlet channels 320 may be the same as the number of burner assemblies 200. The burner assemblies 200 and the outlet channels 320 may be in one-to-one communication, respectively. In the embodiment shown in the figures, the outlet channels 320 may include a first outlet channel 321, a second outlet channel 322, and a third outlet channel 323. The first outlet channel 321 may be in communication between the inlet channel 310 and the first burner assembly 201. The second outlet passage 322 may be in communication between the inlet passage 310 and the second burner assembly 202. The third outlet passage 323 may be in communication between the inlet passage 310 and the third burner assembly 203.
In practical use of the stove, as shown in connection with the arrow direction shown in fig. 7, the gas may sequentially pass through the inlet manifold 100 and the inlet channels 310, and then through at least two outlet channels 320 and the burner assembly 200 in communication therewith, respectively. As such, the burner assembly 200 may mix the fuel gas and air for combustion.
According to the kitchen range provided by the embodiment of the utility model, the flow dividing piece 300 is arranged, the air inlet channel 310 on the flow dividing piece 300 is communicated with the air inlet main pipe 100, and the at least two burner assemblies 200 are respectively communicated with the at least two air outlet channels 320 on the flow dividing piece 300 in a one-to-one correspondence manner, so that the at least two burner assemblies 200 are connected at the same position of the air inlet main pipe 100, and the air inlet pressure balance of each burner assembly 200 is realized. In this way, the gas injection flow rates of the individual burner assemblies 200 can be kept uniform, so that the combustion state can be kept uniform. By such arrangement, deviations in the smoke state and/or thermal efficiency of the respective burner assemblies 200 can be avoided, so that the combustion stability can be ensured to be good. Therefore, the stability of the kitchen range is better.
Illustratively, the shunt 300 may include a connection 330. The intake manifold 100 may be provided with a connection fitting 110. The connection part 330 and the connection fitting part 110 may be screw-coupled. In this way, the splitter 300 may be threadably coupled to the intake manifold 100. So configured, the strength of the connection of the flow splitter 300 to the intake manifold 100 is high. Also, the sealability between the flow divider 300 and the intake manifold 100 is good, so that the risk of occurrence of air leakage can be prevented.
Illustratively, the shunt 300 may also include a head 340. The head 340 may have an end surface 341 and a side surface 342. The connection portion 330 may protrude above the end surface 341. The air intake channel 320 may extend into the head 340 from an end of the connection 330 remote from the head 340. The outlet channels 320 may extend from the sides 342 into the head 340 in communication with the inlet channels 310. The sides 342 may have different numbers depending on the shape of the head 340. In the embodiment shown in the figures, the head 340 may be generally cube-shaped. As such, the sides 342 may have five. The outlet channels 320 may extend from the same side 342 into the head 340; or the outlet channels 320 may extend into the head 340 from different sides 342. So set up, the structure of reposition of redundant personnel 300 is comparatively succinct, is convenient for manufacturing.
Illustratively, the combustor assembly 200 may include a regulator valve 210 and a combustor body 220. The regulating valve 210 may be provided with an air inlet and an air outlet. The air inlet may be connected to the air inlet branch pipe 230 by welding, clamping or screwing. The end of the inlet manifold 230 distal from the inlet port may be connected to the outlet channel 320 by any suitable means, such as welding, clamping, or threading. The air outlet may be connected to the air delivery pipe 240 by any suitable means, such as welding, clamping, or threaded connection. The end of the air delivery tube 240 remote from the air outlet may be coupled to the burner body 220 by any suitable means, such as welding, clamping, or threading.
After passing through the outlet passage 320, the gas may pass through the inlet branch pipe 230, the regulating valve 210, and the gas pipe 240 in order, as shown by the arrows shown in fig. 7, so as to be introduced into the burner body 220 for combustion. Among other things, the regulator valve 210 may employ various types of regulator valves known in the art or that may occur in the future, including but not limited to plug valves. The regulating valve 210 may be used to regulate the flow of the gas. The number of air delivery tubes 240 may be arbitrary. The number of air delivery pipes 240 may be the same as the number of injector pipes of the burner body 220. So arranged, the burner assembly 200 has a simpler structure and low manufacturing cost.
Illustratively, the cross-sectional flow area of the inlet manifold 230 is less than the cross-sectional flow area of the inlet manifold 100. Since the gas is split after passing through the splitter 300, the flow rate of the gas passing through one of the inlet branches 230 may be smaller than the flow rate of the gas passing through the inlet manifold 100. Therefore, the flow cross-sectional area of the air inlet branch pipe 230 can be properly reduced, so that the consumable material can be reduced, and the manufacturing cost of the kitchen range can be reduced.
Illustratively, the outlet passageway 320 may have an internally threaded section 324 formed thereon. The end of the inlet manifold 230 remote from the inlet port may have an externally threaded section (not shown). The male threaded section and the female threaded section 324 may be connected. In this way, the inlet manifold 230 may be threadably connected to the splitter 300. So arranged, the strength of the connection of the inlet manifold 230 and the splitter 300 is high. Also, the sealability between the inlet branch pipe 230 and the flow divider 300 is good, so that the risk of occurrence of air leakage can be prevented.
Illustratively, the cooktop may also include a bottom shell 400. At least a portion of the flow splitter 300 may be located above the bottom chassis 400. Intake manifold 100 may be located below bottom shell 400. So configured, intake manifold 100 may be unaffected by bottom shell 400, and may thus facilitate connection to a fuel gas source.
For example, a pipe joint 120 may be provided on the intake manifold 100. The connection fitting 110 may be a screw hole provided on the pipe joint 120. The connection 330 may be configured as a stud. The studs may penetrate out of the bottom chassis 400 vertically downward from above the bottom chassis 400 and then be connected to the screw holes. So configured, the strength of the connection of the flow splitter 300 to the intake manifold 100 is high. Also, the sealability between the flow divider 300 and the intake manifold 100 is good, so that the risk of occurrence of air leakage can be prevented.
Illustratively, the head 340 and the bottom chassis 400 may be connected by fasteners. Fasteners include, but are not limited to, screws, bolts or rivets. Thus, the head 340 and the bottom case 400 can be relatively fixed, and the stability of the kitchen range is better.
Illustratively, the head 340 of the splitter 300 may be provided with a threaded bore 343. The screw hole 343 may extend from the end surface 341 in a direction parallel to the intake passage 310. The number of threaded holes 343 may be any number including, but not limited to, two as shown in the figures, for example, one, three, or others. The bottom chassis 400 may have a coupling hole (not shown) thereon corresponding to the screw hole 343. The fastener may be coupled to the threaded hole 343 through the coupling hole. The fastener may be a threaded fastener such as a screw. So arranged, the strength of connection between the head 340 and the bottom chassis 400 is high, and connection and disconnection are facilitated.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front", "rear", "upper", "lower", "left", "right", "transverse", "vertical", "horizontal", and "top", "bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, without limiting the scope of protection of the present utility model; the orientation terms "inner" and "outer" refer to the inner and outer relative to the outline of the components themselves.
For ease of description, regional relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein to describe regional positional relationships of one or more components or features to other components or features illustrated in the figures. It will be understood that the relative terms of regions include not only the orientation of the components illustrated in the figures, but also different orientations in use or operation. For example, if the element in the figures is turned over entirely, elements "over" or "on" other elements or features would then be included in cases where the element is "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". Moreover, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and all such cases are intended to be encompassed herein.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, components, assemblies, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
The present utility model has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. In addition, it will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. The kitchen range comprises an air inlet main pipe and at least two combustor assemblies, and is characterized by further comprising a flow dividing piece, wherein the flow dividing piece is provided with an air inlet channel and at least two air outlet channels, and the at least two air outlet channels are respectively communicated with the air inlet channels;
the air inlet channels are communicated with the air inlet header pipe, and at least two burner assemblies are communicated with at least two air outlet channels in a one-to-one correspondence mode.
2. The hob according to claim 1, characterized in, that the shunt comprises a connection part, on which a connection fitting is provided, the connection part being in threaded connection with the connection fitting.
3. The cooktop of claim 2, wherein the flow divider further comprises a head having an end face and a side face, the connecting portion protruding above the end face, the inlet passage extending into the head from an end of the connecting portion remote from the head, the outlet passage extending into the head from the side face in communication with the inlet passage.
4. The cooktop of claim 3, wherein the burner assembly includes a regulating valve and a burner body, the regulating valve is provided with an air inlet and an air outlet, the air inlet is connected with an air inlet branch pipe, one end of the air inlet branch pipe away from the air inlet is connected to the air outlet channel, the air outlet is connected with an air pipe, and one end of the air pipe away from the air outlet is connected to the burner body.
5. The cooktop of claim 4, wherein the cross-sectional flow area of the inlet manifold is less than the cross-sectional flow area of the inlet manifold.
6. The cooking appliance according to claim 4, wherein the air outlet passage is formed with an internal thread section, and an end of the air inlet branch pipe, which is far away from the air inlet, is provided with an external thread section, and the external thread section is connected with the internal thread section.
7. The cooktop of any of claims 2 to 6, further comprising a bottom shell, at least a portion of the diverter being located above the bottom shell, and the intake manifold being located below the bottom shell.
8. The cooking appliance according to claim 7, wherein a pipe joint is provided on the air inlet manifold, the connection fitting is a threaded hole provided on the pipe joint, the connection part is configured as a stud, and the stud penetrates through the bottom shell vertically downwards from above the bottom shell and then is connected to the threaded hole.
9. The cooktop of any of claims 3 to 6, further comprising a bottom shell, the head and bottom shell being connected by a fastener.
10. The hob according to claim 9, characterized in that the head is provided with a threaded hole extending from the end face in a direction parallel to the air intake channel, the bottom shell being provided with a connecting hole corresponding to the threaded hole, the fastener being connected to the threaded hole through the connecting hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202322106052.4U CN220453734U (en) | 2023-08-07 | 2023-08-07 | Kitchen range |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202322106052.4U CN220453734U (en) | 2023-08-07 | 2023-08-07 | Kitchen range |
Publications (1)
Publication Number | Publication Date |
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CN220453734U true CN220453734U (en) | 2024-02-06 |
Family
ID=89728427
Family Applications (1)
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CN202322106052.4U Active CN220453734U (en) | 2023-08-07 | 2023-08-07 | Kitchen range |
Country Status (1)
Country | Link |
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CN (1) | CN220453734U (en) |
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2023
- 2023-08-07 CN CN202322106052.4U patent/CN220453734U/en active Active
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