CN219572266U - Water heater and water heating system - Google Patents
Water heater and water heating system Download PDFInfo
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- CN219572266U CN219572266U CN202321005685.XU CN202321005685U CN219572266U CN 219572266 U CN219572266 U CN 219572266U CN 202321005685 U CN202321005685 U CN 202321005685U CN 219572266 U CN219572266 U CN 219572266U
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Abstract
The utility model relates to the field of water heaters, and provides a water heater and a water heating system, wherein the water heater comprises a controller, a heat preservation liner, a water inlet channel, a water outlet channel, a connecting channel and a flow control mechanism, one end of the connecting channel is communicated with the water inlet channel, the other end of the connecting channel is communicated with the water outlet channel, the flow control mechanism comprises a first flow control mechanism for adjusting the flow of a downstream part of the water inlet channel, which is positioned at the communication position of the connecting channel and the water outlet channel, and a second flow control mechanism for adjusting the flow of the connecting channel, and the first flow control mechanism and the second flow control mechanism are electrically connected with the controller. The flow control mechanism is convenient to control the flow of cold water mixed with hot water and the flow of cold water entering the heat preservation liner simultaneously, so that the water temperature at the outlet of the water outlet channel is kept constant, and the convenience of using hot water by a user is improved.
Description
Technical Field
The utility model relates to the field of water heaters, in particular to a water heater and a water heating system.
Background
The electric water heater comprises a heat preservation inner container for storing water, a water inlet channel for conveying cold water to the heat preservation inner container, and a water outlet channel for conveying hot water from the heat preservation inner container, wherein a water tap is generally arranged in the existing electric water heater to be communicated with the water outlet channel and a tap water pipe, the water outlet temperature of the water tap reaches the temperature required by a user through adjusting the flow of the water outlet channel and the tap water pipe, along with the consumption of hot water in the heat preservation inner container, cold water is continuously conveyed into the heat preservation inner container, the water temperature in the heat preservation inner container is reduced, the water outlet temperature of the water tap is gradually reduced under the same water tap position, the water outlet temperature of the water tap is required to be continuously adjusted by the user, so that the water outlet temperature of the water tap is basically stable, and the operation is inconvenient when the user uses the hot water.
Disclosure of Invention
The utility model aims to overcome the defect that a user cannot operate conveniently by using hot water in the prior art, and provides a water heater and a hot water system.
The utility model solves the technical problems by the following technical scheme:
the utility model provides a water heater, its includes controller, heat preservation inner bag, intercommunication heat preservation inner bag's inlet channel and outlet channel, water heater still includes:
one end of the connecting channel is communicated with the water inlet channel, and the other end of the connecting channel is communicated with the water outlet channel;
the flow control mechanism comprises a first flow control mechanism for adjusting the flow of a downstream part of the water inlet channel, which is positioned at the communication part of the connecting channel and the water outlet channel, and a second flow control mechanism for adjusting the flow of the connecting channel, wherein the first flow control mechanism and the second flow control mechanism are electrically connected with the controller.
In the technical scheme, the downstream part of the water inlet channel, which is positioned at the communication part of the connecting channel and the water outlet channel, is a water inlet section of the inner container, and the water inlet section of the inner container is used for supplying cold water to the heat-preserving inner container; the connecting channel is used for supplying cold water to the water outlet channel so as to mix hot water from the heat preservation liner, so that the water temperature at the outlet of the water outlet channel is proper. The flow control mechanism is arranged to adjust the flow of the communication channel and the water inlet section of the inner container so as to control cold water entering the heat-preserving inner container, and the excessive drop of the water temperature of the heat-preserving inner container caused by excessive cold water entering the heat-preserving inner container is avoided, so that more hot water with higher temperature is provided; the amount of cold water used for mixing with hot water is convenient to control, so that the water temperature at the outlet of the water outlet channel is proper; the water outlet device is convenient to control the flow of the connecting channel and the water inlet section of the liner simultaneously, so that the water temperature at the water outlet of the water outlet channel is kept constant, a user is not required to continuously adjust the water tap in the process of using hot water, and the convenience of using hot water by the user is improved.
Preferably, the first flow control mechanism and the second flow control mechanism are electromagnetic valves;
and/or the communication position of the connecting channel and the water inlet channel is a first communication position, and the first flow control mechanism and the second flow control mechanism are both arranged at the first communication position.
In the technical scheme, the electromagnetic valve is adopted to regulate the flow, and the flow control device is simple, reliable, high in accuracy and low in cost. The first flow control mechanism and the second flow control mechanism are arranged at the first communication position, so that the water heater is compact in structure. The first communication position corresponds to the inlet of the water inlet section of the inner container and the inlet of the connecting channel, the first flow control mechanism is arranged corresponding to the inlet of the water inlet section of the inner container, and the second flow control mechanism is arranged corresponding to the inlet of the connecting channel, so that the connection and maintenance of the pipeline and the flow control mechanism are facilitated.
Preferably, the communication position of the connecting channel and the water outlet channel is a second communication position;
a temperature sensor is arranged at the downstream of the second communication part, and the temperature sensor is electrically connected with the controller;
or, a temperature sensor is arranged at the second communication position, and the temperature sensor is electrically connected with the controller.
In this technical scheme, set up temperature sensor to detect the temperature after the hot water that keeps warm the inner bag provided and the cold water that the connecting channel provided mix in the play water passageway, so that form the feedback to flow control mechanism's regulation effect, improve flow control's accuracy. Compared with the second communication position, the mixing of cold water and hot water in the downstream of the second communication position is more sufficient, the temperature sensor is arranged in the downstream of the second communication position, and the detected water temperature information is more accurate.
Preferably, the temperature sensor is arranged at the downstream of the second communication part, and a first turbulence mechanism is arranged between the second communication part and the temperature sensor.
In this technical scheme, set up first vortex mechanism for cold water from the connecting channel and the hot water from the heat preservation inner bag mix more fully. The temperature sensor is arranged at the downstream of the first turbulence mechanism, so that the accuracy of the detected water temperature information is further improved.
Preferably, a first flow sensor is arranged at the downstream of the communication part of the connecting channel and the water outlet channel, and the first flow sensor is positioned at the downstream of the first flow control mechanism; a second flow sensor is arranged in the connecting channel and is positioned at the downstream of the second flow control mechanism; the first flow sensor and the second flow sensor are electrically connected with the controller.
In the technical scheme, a first flow sensor is arranged to collect the flow of cold water entering the heat preservation liner, and a second flow sensor is arranged to collect the flow of cold water used for mixing with hot water, so that on one hand, a controller can conveniently determine a control instruction according to the two flow information; on the other hand, the first flow sensor is arranged to form feedback on the adjusting action of the first flow control mechanism, and the second flow sensor is arranged to form feedback on the adjusting action of the second control mechanism, so that the adjustment is more accurate.
Preferably, the water heater further comprises a housing, and the connecting channel is arranged in the housing.
In the technical scheme, the connecting channel is arranged in the shell, so that the water heater is compact in structure.
Preferably, the outer wall of the heat preservation inner container and the inner wall of the shell jointly define an isolation cavity, and the connecting channel and/or the flow control mechanism are/is arranged in the isolation cavity.
In this technical scheme, connecting channel and/or flow control mechanism set up in the isolation intracavity, only need open the casing and can maintain convenient operation.
Preferably, the heat preservation inner container and the isolation cavity are distributed in sequence along the length direction of the shell.
In this technical scheme, keep warm the inner bag and keep apart the chamber and distribute in proper order along the length direction of casing, can avoid for setting up the size of other directions of keeping apart the chamber and increase the water heater, the installation of being convenient for the water heater.
Preferably, a second turbulence mechanism is arranged at the downstream of the communication part of the connecting channel and the water outlet channel, and the second turbulence mechanism is coated with a scale inhibiting material;
and/or a magnesium rod is arranged in the heat preservation liner.
In the technical scheme, the second turbulence mechanism is arranged to disturb water flow, so that scale deposition in the water inlet section of the liner is reduced or avoided. The scale inhibiting material is coated on the second turbulence mechanism, so that water flow and the scale inhibiting material are convenient to fully contact to remove scale, and water flowing through the water inlet section of the liner is also convenient to flow into the heat insulation liner to remove the scale in the heat insulation liner. The magnesium rod is arranged to avoid corrosion of the heat preservation liner.
A water heating system comprising the water heater.
The utility model has the positive progress effects that:
the downstream part of the water inlet channel, which is positioned at the communication part of the connecting channel and the water outlet channel, is a water inlet section of the inner container, and the flow control mechanism is arranged to adjust the flow of the communication channel and the water inlet section of the inner container so as to control the cold water entering the heat-preserving inner container, and avoid excessive water temperature drop of the heat-preserving inner container caused by excessive cold water entering the heat-preserving inner container so as to provide more hot water with higher temperature; the amount of cold water used for mixing with hot water is convenient to control, so that the water temperature at the outlet of the water outlet channel is proper; the water outlet device is convenient to control the flow of the connecting channel and the water inlet section of the liner simultaneously, so that the water temperature at the water outlet of the water outlet channel is kept constant, a user is not required to continuously adjust the water tap in the process of using hot water, and the convenience of using hot water by the user is improved.
Drawings
FIG. 1 is a schematic diagram of a hot water system according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a water heater according to an embodiment of the present utility model;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic view of a water heater according to an embodiment of the present utility model at a second connection;
fig. 5 is a schematic structural view of a water heater according to an embodiment of the present utility model at a first connection point.
Reference numerals illustrate:
a hot water system 1000;
the water heater 100, the heat preservation liner 1, the water inlet channel 2, the water outlet channel 3, the connecting channel 4, the first connecting position 5, the second connecting position 6, the liner water inlet section 7, the liner water outlet section 8, the temperature sensor 9, the first flow sensor 10, the second flow sensor 11, the first turbulence mechanism 12, the second turbulence mechanism 13, the isolation cavity 15, the magnesium rod 16, the heating rod 17, the first flow control mechanism 18 and the second flow control mechanism 19;
a shower head 20, a tap 21;
the length direction L of the housing.
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
It should be noted that:
the unlabeled arrowed line segments in the figures are used to indicate the direction of water flow;
in the direction of water flow, water flows from upstream to downstream.
Fig. 1-5 are schematic structural diagrams of a water heating system 1000 according to an embodiment of the utility model.
As shown in fig. 1-3, the water heating system 1000 includes a water heater 100, a shower head 20, a faucet 21, the water heater 100 including:
the heat preservation liner 1 is used for storing water;
the water inlet channel 2 is communicated with the heat preservation liner 1 and is used for providing cold water for the heat preservation liner 1;
the water outlet channel 3 is communicated with the heat preservation liner 1;
the connecting channel 4, one end of the connecting channel 4 is communicated with the water inlet channel 2 and forms a first communicating position 5, and the part of the water inlet channel 2 positioned at the downstream of the first communicating position 5 is a liner water inlet section 7; the other end of the connecting channel 4 is communicated with the water outlet channel 3 and forms a second communication position 6, and the part of the connecting channel 4 positioned at the upstream of the second communication position 6 is a liner water outlet section 8; the inner container water inlet section 7 is used for providing cold water for the heat preservation inner container 1, and the connecting channel 4 is used for conveying the cold water to the second communication position 6 and mixing the cold water with the hot water from the inner container water outlet section 8;
the flow control mechanism comprises a first flow control mechanism 18 for adjusting the flow of the liner water inlet section 7 and a second flow control mechanism 19 for adjusting the flow of the connecting channel 4;
the controller is electrically connected with the first flow control mechanism 18 and the second flow control mechanism 19, and is used for controlling the actions of the first flow control mechanism 18 and the second flow control mechanism 19.
The flow control mechanism is arranged to adjust the flow of the communication channel and the water inlet section 7 of the inner container so as to control cold water entering the heat-preserving inner container 1, and the phenomenon that the water temperature of the heat-preserving inner container 1 drops too much due to excessive cold water entering the heat-preserving inner container 1 is avoided, so that hot water is saved, and the service time of the hot water is long; the flow rate of the connecting channel 4 is convenient to control, namely the amount of cold water used for mixing with the hot water from the heat preservation liner 1 is convenient to control, so that the water temperature at the outlet of the water outlet channel 3 is suitable; the water temperature at the outlet of the water outlet channel 3 is kept constant by simultaneously controlling the flow of the connecting channel 4 and the water inlet section 7 of the inner container, the tap 21 is not required to be continuously adjusted by a user in the process of using hot water, and the convenience of using the hot water by the user is improved.
Optionally, the water heater 100 is an electric water heater. Alternatively, in other embodiments, the water heater 100 may be an electric water heater, a solar water heater, or the like having the heat preservation liner 1 and the heating function.
Alternatively, the first flow control mechanism 18 and the second flow control mechanism 19 are solenoid valves. The electromagnetic valve is adopted to regulate the flow, so that the flow control device is simple, reliable, high in accuracy and low in cost. In other embodiments, the flow control mechanism may employ a power device to drive a ball valve, cone valve, or the like to control flow.
Optionally, the first flow control mechanism 18 and the second flow control mechanism 19 are both disposed at the first communication position 5, the first communication position 5 corresponds to the inlet of the liner water inlet section 7 and the inlet of the connecting channel 4, the first flow control mechanism 18 corresponds to the inlet of the liner water inlet section 7, and the second flow control mechanism 19 corresponds to the inlet of the connecting channel 4, so that connection and maintenance of the pipeline and the flow control mechanism are facilitated.
Alternatively, the first flow control mechanism 18 and the second flow control mechanism 19 are both solenoid valves, and the first flow control mechanism 18 and the second flow control mechanism 19 are both disposed at the first communication site 5, and in one embodiment, only either one of these two schemes may be adopted, and both schemes may be adopted simultaneously.
Optionally, as shown in fig. 3 and fig. 4, a temperature sensor 9 is disposed at the downstream of the second communication portion 6, and the temperature sensor 9 is electrically connected to the controller, so as to detect the temperature of the hot water provided by the heat insulation liner 1 and the cold water provided by the connection channel 4 after being mixed in the water outlet channel 3, so that feedback is formed on the adjustment effect of the flow control mechanism, and the accuracy of flow adjustment is improved. The cold water and the hot water in the downstream of the second communication part 6 are fully mixed, and the temperature sensor 9 is arranged in the downstream of the second communication part 6, so that the detected water temperature information is more accurate.
Alternatively, the temperature sensor 9 may be provided at the second communication 6.
Alternatively, the temperature sensor 9 is arranged downstream of the second communication point 6, and a first spoiler mechanism 12 is arranged between the second communication point 6 and the temperature sensor 9. The first turbulence mechanism 12 is provided so that the cold water from the connection channel 4 and the hot water from the insulation liner 1 are mixed more sufficiently. The temperature sensor 9 is arranged at the downstream of the first turbulence mechanism 12, so that the accuracy of the detected water temperature information is further improved.
As shown in fig. 3-5, a first flow sensor 10 is arranged in the liner water inlet section 7, and the first flow sensor 10 is positioned downstream of the first flow control mechanism 18; a second flow sensor 11 is arranged in the connecting channel 4, and the second flow sensor 11 is positioned at the downstream of the second flow control mechanism; the first flow sensor 10 and the second flow sensor 11 are electrically connected to a controller. The first flow sensor 10 is arranged to collect the flow of cold water entering the heat preservation liner 1, the second flow sensor 11 is arranged to collect the flow of cold water used for mixing with hot water, and on one hand, the controller is convenient to determine a control instruction according to the two flow information; on the other hand, the adjustment of the first flow sensor 10 to the first flow control mechanism 18 is provided as feedback, and the adjustment of the second flow sensor 11 to the second control mechanism is provided as feedback, so that the adjustment is more accurate.
When the user uses hot water, the controller may control the water outlet of the water heater 100 in sequence according to the following steps:
s1, a user opens the tap 21;
s2, adjusting the flow of the connecting channel 4 and the flow of the inner container water inlet section 7 to the maximum flow, respectively obtaining the maximum flow of the connecting channel 4 and the maximum flow of the inner container water inlet section 7, and judging the position of the valve body of the water faucet 21 according to any one or two of the two maximum flows, thereby judging the water temperature required by a user to be the preset temperature;
s3, maintaining the flow of the connecting channel 4 unchanged, and reducing the flow of the water inlet section 7 of the liner to enable the water temperature at the outlet of the water outlet channel 3 to reach a preset temperature;
s4, reducing the flow of the connecting channel 4 so that the water temperature at the outlet of the water outlet channel 3 maintains a preset temperature;
s5, when the flow of the connecting channel 4 reaches the minimum flow, reducing the flow of the water inlet section 7 of the liner so as to maintain the water temperature at the outlet of the water outlet channel 3 at a preset temperature.
And S6, when the flow of the liner water inlet section 7 is reduced to the minimum flow, maintaining the flow of the liner water inlet section 7 at the minimum flow.
The controller controls the water outlet of the water heater 100 according to the steps S2-S6, on one hand, the water outlet temperature at the water tap 21 can be kept constant in the steps S3-S5, the water tap 21 is not required to be manually adjusted by a user, and the convenience of use of the user is improved; on the other hand, too much cold water entering the heat-preserving liner 1 can lead to the mixing of hot water in the heat-preserving liner 1, the water temperature after mixing is lower than the preset temperature, and in the steps S3-S5, the cold water entering the heat-preserving liner 1 is reduced by controlling the flow of the water inlet section 7 of the liner, so that the too much cold water entering the heat-preserving liner 1 can be prevented from causing too fast reduction of the water temperature in the heat-preserving liner 1, hot water can be saved, and more hot water with the preset temperature can be provided for users, and the service time of the hot water is long.
Optionally, the minimum flow of the liner water inlet section 7 is 2.5L/min.
Alternatively, in other embodiments, a touch panel or key, etc. electrically connected to the controller may be provided for the user to input a desired preset temperature.
Optionally, the water heater 100 further comprises a housing, and the connection channel 4 is disposed in the housing, so that the water heater 100 is compact.
Alternatively, as shown in fig. 2 and 3, the outer wall of the heat-insulating liner 1 and the inner wall of the housing jointly define an isolation cavity 15, and the connecting channel 4 and the flow control mechanism are disposed in the isolation cavity 15. The connecting channel 4 and the flow control mechanism are arranged in the isolation cavity 15, and maintenance can be performed by only opening the shell, so that the operation is convenient.
Alternatively, in other embodiments, one of the connection channel 4 and the flow control mechanism may be disposed within the isolation chamber 15, and the other may be disposed outside the isolation chamber 15.
Alternatively, as shown in fig. 2, the insulating liner 1 and the isolation chamber 15 are sequentially distributed along the length direction L of the housing, so that the size of the water heater 100 in other directions can be prevented from being increased for setting the isolation chamber 15, and the water heater 100 can be conveniently installed.
Optionally, as shown in fig. 3 and 5, a second turbulence mechanism 13 is arranged in the water inlet section 7 of the inner container, so as to reduce or avoid scale deposition in the water inlet section 7 of the inner container. The second turbulence mechanism 13 is coated with a scale inhibiting material, so that water flow and the scale inhibiting material are convenient to fully contact to remove scale, and water in the water inlet section 7 of the liner enters the heat insulation liner 1 to remove the scale in the heat insulation liner 1.
The scale inhibiting material is commercially available, alternatively, the scale inhibiting material is a farafol scale inhibitor.
Optionally, the second turbulence mechanism 13 is a spiral plate, so that the turbulence effect is good.
Optionally, as shown in fig. 2, a magnesium rod 16 is arranged in the heat-preserving liner 1 to prevent the corrosion of the metal heat-preserving liner 1.
Optionally, in other embodiments, a second turbulence mechanism 13 is arranged in the water inlet section 7 of the liner, and the second turbulence mechanism 13 is coated with a scale inhibiting material; a magnesium rod 16 is arranged in the heat preservation liner 1; either of these two solutions may be employed.
Optionally, the water heater 100 heats the water in the heat preservation liner 1 through the heating rod 17, and the heating rod 17 is a zirconium gold heating rod 17.
Optionally, holes with consistent shapes and sizes are arranged on the water inlet section 7 of the inner container at intervals, so that water entering the heat-insulation inner container 1 from the water inlet section 7 of the inner container forms a laminar structure, and uniform heating of the water in the heat-insulation inner container 1 is facilitated.
Optionally, the highest heating temperature of the heat preservation liner 1 is set to 80 ℃, the heat preservation temperature of the heat preservation liner 1 is set to 60 ℃, when the water temperature in the heat preservation liner 1 is lower than 60 ℃, the heating rod 17 is electrified to heat the water in the heat preservation liner 1, and the heating is stopped when the water temperature is heated to 80 ℃. The highest heating temperature is set to 80 ℃, so that the formation of more scale due to the fact that the highest heating temperature is too high can be avoided. The heat preservation temperature is set to 60 ℃, so that the heat preservation temperature is prevented from being heated frequently due to overhigh heat preservation temperature, and the energy-saving effect is achieved.
Alternatively, when the water tap 21 is not turned on, the water temperature in the insulating liner 1 may be detected by the above temperature sensor 9 to determine whether heating needs to be started or continued.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.
Claims (10)
1. The utility model provides a water heater, its includes controller, heat preservation inner bag, intercommunication heat preservation inner bag's inlet channel and play water channel, its characterized in that, water heater still includes:
one end of the connecting channel is communicated with the water inlet channel, and the other end of the connecting channel is communicated with the water outlet channel;
the flow control mechanism comprises a first flow control mechanism for adjusting the flow of a downstream part of the water inlet channel, which is positioned at the communication part of the connecting channel and the water outlet channel, and a second flow control mechanism for adjusting the flow of the connecting channel, wherein the first flow control mechanism and the second flow control mechanism are electrically connected with the controller.
2. The water heater of claim 1, wherein the first flow control mechanism and the second flow control mechanism are solenoid valves;
and/or the communication position of the connecting channel and the water inlet channel is a first communication position, and the first flow control mechanism and the second flow control mechanism are both arranged at the first communication position.
3. The water heater as claimed in claim 1, wherein the connection passage and the water outlet passage are in communication with a second connection;
a temperature sensor is arranged at the downstream of the second communication part, and the temperature sensor is electrically connected with the controller;
or, a temperature sensor is arranged at the second communication position, and the temperature sensor is electrically connected with the controller.
4. A water heater as claimed in claim 3, wherein the temperature sensor is provided downstream of the second communication, and a first spoiler mechanism is provided between the second communication and the temperature sensor.
5. The water heater as claimed in any one of claims 1-4, wherein a first flow sensor is provided downstream of where the connecting passage and the water outlet passage communicate, the first flow sensor being downstream of the first flow control mechanism; a second flow sensor is arranged in the connecting channel and is positioned at the downstream of the second flow control mechanism; the first flow sensor and the second flow sensor are electrically connected with the controller.
6. The water heater as recited in claim 1 further comprising a housing, said connecting passage being disposed within said housing.
7. The water heater as recited in claim 6, wherein an outer wall of the insulating liner and an inner wall of the housing together define an isolation cavity, the connecting channel and/or the flow control mechanism being disposed within the isolation cavity.
8. The water heater of claim 7, wherein the insulating liner and the isolation chamber are sequentially distributed along the length of the housing.
9. The water heater as claimed in claim 1, wherein a second turbulence mechanism is arranged downstream of the connection channel and the water outlet channel, and the second turbulence mechanism is coated with a scale inhibiting material;
and/or a magnesium rod is arranged in the heat preservation liner.
10. A water heating system comprising a water heater as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321005685.XU CN219572266U (en) | 2023-04-28 | 2023-04-28 | Water heater and water heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321005685.XU CN219572266U (en) | 2023-04-28 | 2023-04-28 | Water heater and water heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219572266U true CN219572266U (en) | 2023-08-22 |
Family
ID=87647597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321005685.XU Active CN219572266U (en) | 2023-04-28 | 2023-04-28 | Water heater and water heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219572266U (en) |
-
2023
- 2023-04-28 CN CN202321005685.XU patent/CN219572266U/en active Active
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