CN219934262U - Self-adaptive drainage anti-freezing gas water heater - Google Patents
Self-adaptive drainage anti-freezing gas water heater Download PDFInfo
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- CN219934262U CN219934262U CN202320935993.6U CN202320935993U CN219934262U CN 219934262 U CN219934262 U CN 219934262U CN 202320935993 U CN202320935993 U CN 202320935993U CN 219934262 U CN219934262 U CN 219934262U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 253
- 238000007710 freezing Methods 0.000 title claims abstract description 41
- 230000009471 action Effects 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 48
- 238000002485 combustion reaction Methods 0.000 claims description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 208000001034 Frostbite Diseases 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 claims 9
- 239000000498 cooling water Substances 0.000 claims 3
- 238000005336 cracking Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The utility model relates to a self-adaptive water drainage anti-freezing type gas water heater, which is characterized in that a water flow sensor provided with a temperature sensor is used for detecting the water temperature of water inflow, if the water temperature of the water inflow is low, a main control board MCU is used for controlling a first electromagnetic valve to be closed so as to break water inflow, a main control board MCU is used for controlling a second electromagnetic valve to be opened so as to open an anti-freezing water outlet, the main control board MCU is used for controlling a fan to start, a valve of a one-way valve is opened under the action of the fan, cold water on a connecting pipeline between the anti-freezing water outlet and a cold water inlet is discharged to the anti-freezing water outlet under the action of wind power so as to realize automatic cold water discharge of the anti-freezing water outlet, a drain valve is not required to be opened manually, and cold water with too low temperature is prevented from the water inflow end of the gas water heater to enter the gas water heater, and thus the frost cracking problem of the gas water heater can be effectively prevented.
Description
Technical Field
The utility model relates to the technical field of gas water heaters, in particular to a self-adaptive drainage anti-freezing gas water heater.
Background
Chinese patent No. CN206269377U discloses a gas water heater with one-key drainage and anti-freezing functions, comprising a water heater main body and a heat exchanger, a water inlet pipe, a water outlet pipe, a drainage channel, a fan and a main controller which are arranged in the water heater main body, wherein the water inlet pipe and the water outlet pipe are connected with the heat exchanger, the main controller is connected with the control fan, an air outlet of the fan is connected with a water inlet pipe of the heat exchanger in series, a one-way valve is arranged between the fan and the water inlet pipe, the drainage channel is connected with the water outlet pipe, and a drainage valve is arranged on the drainage channel. Referring to the 16 th section of the patent specification, when a user bathes, the wind force F1 of the fan is insufficient to push the check valve open because the rotation speed of the fan is not maximum, and the branch of the check valve is in a closed state. After the bath of the user is finished, the drain valve is opened, the start button of one-key drainage is pressed, the main controller sends out a command, the fan is started at the moment, the rotating speed reaches the maximum, and the pushing force F is larger than the resistance of the one-way valve; the branch of the one-way valve is opened, water in the heat exchanger is discharged through the drain valve under the action of blowing force F2 of the fan, and the fan is automatically closed after running for a period of time; at this time, the water stored in the heat exchanger is completely discharged, so that the problem of frost cracking of the heat exchanger is fundamentally prevented.
The gas water heater has the following defects:
the water discharge valve is required to be opened manually, the patent does not mention how to plug the water inlet of the gas water heater, namely, the water inlet end of the gas water heater is firstly disconnected, and then the water discharge valve can be opened.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides the self-adaptive drainage anti-freezing type gas water heater, the water flow sensor provided with the temperature sensor is used for detecting the water temperature of the water, if the water temperature of the water is low, the main control board MCU is used for controlling the first electromagnetic valve to be closed so as to break the water, the main control board MCU is used for controlling the second electromagnetic valve to be opened so as to open the anti-freezing water outlet, the main control board MCU is used for controlling the fan to start, the valve of the one-way valve is opened under the action of the fan, cold water on the connecting pipeline between the anti-freezing water outlet and the cold water inlet is discharged to the anti-freezing water outlet under the action of wind force, so that the automatic discharge of the cold water from the anti-freezing water outlet is realized, the drain valve is not required to be opened manually, and cold water with too low temperature is prevented from the water inlet end of the gas water heater to enter the gas water heater, and the frost cracking problem of the gas water heater can be effectively prevented.
The purpose of the utility model is realized in the following way:
the utility model provides a self-adaptation drainage type gas heater that prevents frostbite, including main control board MCU, the freeze outlet of setting on the organism, the cold water inlet, be equipped with the fan in the organism, be equipped with first solenoid valve on the connecting tube between freeze outlet and the cold water inlet, water flow sensor, the second solenoid valve, first solenoid valve, water flow sensor, the second solenoid valve is connected gradually through the pipeline respectively, and first solenoid valve, pipeline between the water flow sensor extends through first communication valve and is equipped with first subchannel, be equipped with the check valve on the subchannel, air intake one end of fan is connected with the check valve through the pipeline, be equipped with the temperature sensor who detects the temperature in the water flow sensor, first solenoid valve, water flow sensor, the second solenoid valve, the fan is automatically controlled through lead wire and main control board MCU respectively, cold water passes through first solenoid valve in proper order through the cold water inlet, water flow sensor, when water temperature sensor to main control board MCU transmission information signal is low, in order to break water, main control board MCU controls the second solenoid valve and opens, in order to open the freeze outlet, main control board control fan starts, the valve is opened under the effect of the fan, the automatic cold water outlet is connected under the effect of preventing frostbite to the cold water outlet down to the cold water outlet. The water discharge valve does not need to be manually opened, cold water with too low temperature is prevented from entering the gas water heater from the water inlet end of the gas water heater, so that the problem of frost cracking of the gas water heater can be effectively prevented, excessive cold water with low temperature is prevented from entering the gas water heater through the water flow sensor, the water flow sensor is prevented from being easily frost cracked, and the service life of a product is prolonged.
The machine body is also provided with a hot water outlet, an antifreezing water outlet, a cold water inlet and a hot water outlet which are respectively connected through pipelines, a second sub-runner connected with the antifreezing water outlet is arranged on the connecting pipeline between the hot water outlet and the cold water inlet in an extending way through a second communication valve, and when the first electromagnetic valve is opened and the second electromagnetic valve is closed, cold water flows to the hot water outlet through the cold water inlet; when the first electromagnetic valve is closed and the second electromagnetic valve is opened, cold water flows to the anti-freezing water outlet through the cold water inlet, and under the condition that water outlet of the gas water heater is not affected, the anti-freezing water outlet and the second electromagnetic valve are additionally arranged, so that the problem of frost cracking of the gas water heater is prevented.
The main control board MCU controls the opening and closing of the first electromagnetic valve and the second electromagnetic valve according to the water temperature information of the temperature sensor of the water flow sensor. When the temperature information detected by the temperature sensor of the water flow sensor is lower than the control temperature value of minus 5 ℃, the main control board MCU controls the first electromagnetic valve to be closed, the second electromagnetic valve to be opened, and the main control board MCU controls the opening and closing of the first electromagnetic valve and the second electromagnetic valve to change the flow direction of water.
The heat exchanger is also arranged in the machine body, the water inlet end of the heat exchanger is sequentially connected with the water flow sensor, the first electromagnetic valve and the cold water inlet through pipelines, the water outlet end of the heat exchanger is sequentially connected with the hot water outlet through pipelines, and the second sub-runner is arranged on a connecting pipeline between the heat exchanger and the hot water outlet.
The second electromagnetic valve is arranged on a connecting pipeline between the second sub-runner and the anti-freezing water outlet.
The body is also provided with a combustion chamber which acts on the heat exchanger, and high-temperature flue gas generated by the combustion chamber acts on the heat exchanger to heat cold water entering the heat exchanger.
Be equipped with the wiFi module on the main control board MCU, the wiFi module carries out automatically controlled connection through the lead wire with main control board MCU, and external information display terminal is connected through the wiFi module to the gas heater, and external information display terminal carries out information intercommunication through wiFi module and gas heater to acquire gas heater's working information.
The temperature sensor of the water flow sensor transmits a water temperature information signal to the main control board MCU, and the main control board MCU transmits the water temperature information signal and the cold water signal information discharged from the anti-freezing water outlet to the external information display terminal through the WiFi module, so that a user is reminded, the gas water heater cannot be used any more, and the problem that the gas water heater is frozen and cracked due to too low external temperature is effectively avoided.
The check valve comprises a check valve body, a first cavity valve body connected with one end of the check valve body and a second cavity valve body connected with the other end of the check valve body, an elastically movable valve core is arranged in the check valve body, a sealing piece used for opening or closing the opening of the first cavity valve body is arranged on the valve core, the valve core moves towards the second cavity valve body under the action of the fan to open the opening of the first cavity valve body, and then the first cavity valve body is communicated with the second cavity valve body, and flowing air entering the fan enters the second cavity valve body through the first cavity valve body towards the check valve body.
One end of the first cavity valve body is connected with an air inlet of the fan through a pipeline, and one end of the second cavity valve body is connected with the first sub-runner through a pipeline.
The beneficial effects of the utility model are as follows:
cold water flows through a water flow sensor (a temperature sensor is embedded in the water flow sensor) through a first electromagnetic valve (a normally open valve), then flows to a heat exchanger, is connected with a three-way valve, and is connected with a second electromagnetic valve (a normally closed valve) at the front end of an anti-freezing water outlet, and a fan is connected with the one-way valve and is communicated with the first electromagnetic valve and the water flow sensor. The control program is set on the MCU of the gas water heater whole machine through computer software, when the temperature sensor detects that the water temperature is lower than a certain value (generally set to 5 ℃), the MCU of the main control board automatically closes the normally open valve, namely, the water inlet is pinched off, and then the normally closed valve is controlled to be opened, namely, the anti-freezing water outlet is opened, and the air heater is operated by a fan to accelerate rotation, so that the one-way valve can be opened by wind power, accumulated water can be discharged through a pipeline at the moment, the fault can be uploaded to the cloud through the WiFi module, a user can be reminded through the APP of the mobile phone, the water heater can not be used any more, and the frost cracking of the gas water heater due to the fact that the external temperature is too low can be effectively avoided.
Through the arrangement, the gas water heater has the self-adaptive function, manual treatment is not needed, namely, when a user is not at home, the user forgets to drain water, and even if the temperature is too low, the gas water heater can be prevented from frost cracking;
the cloud end can be uploaded through the WiFi module, so that a user is informed in advance that the water heater cannot be used any more, and faults are effectively avoided.
Drawings
FIG. 1 is a schematic view of a structure of cold water discharged from a gas water heater according to an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of a normal operation of a gas water heater according to an embodiment of the present utility model.
Fig. 3 is a schematic structural view of a check valve according to an embodiment of the present utility model.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
Referring to 1-3, a self-adaptive drainage anti-freezing gas water heater comprises a main control board MCU4, an anti-freezing water outlet 2 arranged on a machine body 1, a cold water inlet 3, a fan 9 arranged in the machine body 1, a first electromagnetic valve 5, a water flow sensor 6 and a second electromagnetic valve 7 arranged on a connecting pipeline between the anti-freezing water outlet 2 and the cold water inlet 3, wherein the first electromagnetic valve 5, the water flow sensor 6 and the second electromagnetic valve 7 are respectively connected in sequence through pipelines, a first sub-runner 8 is arranged on the sub-runner 8 through the extension of the first communication valve, a one-way valve 10 is arranged on the sub-runner 8, one end of an air inlet of the fan 9 is connected with the one-way valve 10 through the pipeline, a temperature sensor for detecting water temperature is arranged in the water flow sensor 6, the first electromagnetic valve 5, the water flow sensor 6, the second electromagnetic valve 7 and the fan 9 are respectively connected with the main control board MCU4 in an electric control manner through leads, cold water passes through the first electromagnetic valve 5 and the water flow sensor 6 in sequence, the temperature sensor of the water flow sensor 6 is connected with the main control board 4 in a low-temperature information signal, the main control board 4 controls the first electromagnetic valve 5 to open the water inlet 2, the first electromagnetic valve 5 is controlled by the main control board 4 to open the water inlet 2, the anti-freezing water outlet 2 is opened under the control board 2, the anti-freezing water outlet 2 is opened by the fan 9 is opened, the anti-freezing water outlet 2 is opened, and the anti-freezing water outlet 2 is controlled by the main control board 2 is opened, and the anti-freezing water outlet 2 is opened, and the function is opened by the main control valve 2.
The machine body 1 is also provided with a hot water outlet 11, an antifreezing water outlet 2, a cold water inlet 3 and a hot water outlet 11 which are respectively connected through pipelines, a second sub-runner 12 connected with the antifreezing water outlet 2 is extended on the connecting pipeline between the hot water outlet 11 and the cold water inlet 3 through a second communication valve, the first electromagnetic valve 5 is opened, and cold water flows to the hot water outlet 11 through the cold water inlet 3 when the second electromagnetic valve 7 is closed; when the first electromagnetic valve 5 is closed and the second electromagnetic valve 7 is opened, cold water flows to the anti-freezing water outlet 2 through the cold water inlet 3.
The main control board MCU4 controls the opening and closing of the first electromagnetic valve 5 and the second electromagnetic valve 7 according to the water temperature information of the temperature sensor of the water flow sensor 6.
The heat exchanger 13 is also arranged in the machine body 1, the water inlet end of the heat exchanger 13 is sequentially connected with the water flow sensor 6, the first electromagnetic valve 5 and the cold water inlet 3 through pipelines, the water outlet end of the heat exchanger 13 is sequentially connected with the hot water outlet 11 through pipelines, and the second sub-runner 12 is arranged on a connecting pipeline between the heat exchanger 13 and the hot water outlet 11.
Referring to fig. 1, cold water passes through a first electromagnetic valve 5 (normally open valve) and flows through a water flow sensor 6 (a temperature sensor is embedded in the water flow sensor), then flows to a heat exchanger 13 and is connected with a three-way valve, the front end of an anti-freezing water outlet 2 is connected with a second electromagnetic valve 7 (normally closed valve), and a fan 9 is connected with a one-way valve 10 and is communicated with the first electromagnetic valve 5 and the water flow sensor 6. The control program is set on the MCU4 of the whole main control board of the gas water heater through computer software, when the temperature sensor detects that the water temperature is lower than a certain value (generally set to 5 ℃), the MCU4 of the main control board automatically closes the normally open valve, namely, pinching off water inlet, then opens the normally closed valve, namely, opens the anti-freezing water outlet, and through the action of a fan, the air force can open the one-way valve, water is discharged through a pipeline at the moment, the fault can be uploaded to the cloud through the WiFi module, a user is reminded through the APP of the mobile phone, the water heater cannot be used any more, and the situation that the gas water heater is frozen and cracked due to the fact that the external temperature is too low is effectively avoided.
The second electromagnetic valve 7 is provided on a connecting pipe between the second sub flow passage 12 and the antifreeze drain port 2.
The body 1 is also provided with a combustion chamber 14 which acts on the heat exchanger 13, and the high-temperature flue gas generated by the combustion chamber 14 acts on the heat exchanger 13 to heat the cold water entering the heat exchanger 13.
Be equipped with the wiFi module on the main control board MCU4, the wiFi module carries out automatically controlled connection through the lead wire with main control board MCU4, and external information display terminal is connected through the wiFi module to the gas heater, and external information display terminal carries out information intercommunication through the wiFi module with the gas heater to acquire gas heater's working information.
The temperature sensor of the water flow sensor 6 transmits a water temperature information signal to the main control board MCU4, and the main control board MCU4 transmits the water temperature information signal and the cold water signal information discharged by the anti-freezing water outlet 2 to an external information display terminal through the WiFi module.
The external information display terminal comprises a mobile phone APP, an after-sales internet background cloud and the like.
Referring to fig. 3, the check valve 10 includes a check valve body 15, a first cavity valve body 16 connected with one end of the check valve body 15, and a second cavity valve body 17 connected with the other end of the check valve body 15, an elastically movable valve core 18 is disposed in the check valve body 15, a sealing member 19 for opening or closing the opening of the first cavity valve body 16 is disposed on the valve core 18, the valve core 18 moves towards the second cavity valve body 17 under the action of the fan 9, so as to open the opening of the first cavity valve body 16, and further realize that the first cavity valve body 16 is communicated with the second cavity valve body 17, and flowing air entering the fan 9 enters the second cavity valve body 17 through the first cavity valve body 16 towards the check valve body 15.
One end of the first cavity valve body 16 is connected with an air inlet of the fan 9 through a pipeline, and one end of the second cavity valve body 17 is connected with the first sub-runner 8 through a pipeline.
In this embodiment, one side of the air inlet of the blower 9 is communicated with the outside air, the other side of the air inlet of the blower 9 is connected with the first cavity valve body 16 of the one-way valve 10 through a wind scooper and a wind guide pipeline structure, and the air outlet of the blower 9 is connected with the air inlet of the combustion chamber 14 through the wind scooper and the wind guide pipeline structure.
The foregoing is a preferred embodiment of the utility model showing and describing the general principles, features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing description merely illustrates the principles of the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a self-adaptation drainage gas heater that prevents frostbite, includes main control board MCU (4), sets up anti-freezing outlet (2) on organism (1), cold water inlet (3), is equipped with fan (9), its characterized in that in organism (1): the utility model provides a water-cooling water inlet (3) and a water outlet (2), be equipped with first solenoid valve (5) on the connecting tube between the water-cooling water inlet (3), water flow sensor (6), second solenoid valve (7), first solenoid valve (5), water flow sensor (6), second solenoid valve (7) are connected gradually through the pipeline respectively, and the pipeline between first solenoid valve (5), water flow sensor (6) is equipped with first subchannel (8) through first communicating valve extension, be equipped with check valve (10) on the subchannel (8), air intake one end of fan (9) is connected with check valve (10) through the pipeline, be equipped with the temperature sensor who detects the temperature in water flow sensor (6), first solenoid valve (5), water flow sensor (6), second solenoid valve (7), fan (9) are connected through the lead wire with main control board MCU (4) automatically controlled respectively, cold water passes through first solenoid valve (5), water flow sensor (6) temperature sensor to main control board (4) transmission information signal low through first solenoid valve (6), main control board (4) control first solenoid valve (5) are closed with the opening of water-cooling water inlet (4), the main control board MCU (4) controls the fan (9) to start, the valve of the one-way valve (10) is opened under the action of the fan, and cold water on the connecting pipeline between the anti-freezing water outlet (2) and the cold water inlet (3) is discharged to the anti-freezing water outlet (2) under the action of wind power, so that the anti-freezing water outlet (2) can automatically discharge cold water.
2. The adaptive drainage freeze protection gas water heater of claim 1, wherein: the machine body (1) is also provided with a hot water outlet (11), the anti-freezing water outlet (2), the cold water inlet (3) and the hot water outlet (11) are respectively connected through pipelines, a second sub-runner (12) connected with the anti-freezing water outlet (2) is arranged on a connecting pipeline between the hot water outlet (11) and the cold water inlet (3) in an extending way through a second communication valve, the first electromagnetic valve (5) is opened, and when the second electromagnetic valve (7) is closed, cold water flows to the hot water outlet (11) through the cold water inlet (3); when the first electromagnetic valve (5) is closed and the second electromagnetic valve (7) is opened, cold water flows to the anti-freezing water outlet (2) through the cold water inlet (3).
3. The adaptive drainage freeze protection gas water heater according to claim 1 or 2, wherein: the main control board MCU (4) controls the opening and closing of the first electromagnetic valve (5) and the second electromagnetic valve (7) according to the water temperature information of the temperature sensor of the water flow sensor (6).
4. The adaptive drain freeze protection gas water heater of claim 2, wherein: a heat exchanger (13) is further arranged in the machine body (1), a water inlet end of the heat exchanger (13) is sequentially connected with the water flow sensor (6), the first electromagnetic valve (5) and the cold water inlet (3) through pipelines, a water outlet end of the heat exchanger (13) is sequentially connected with the hot water outlet (11) through pipelines, and the second sub-runner (12) is arranged on a connecting pipeline between the heat exchanger (13) and the hot water outlet (11).
5. The adaptive drainage freeze protection gas water heater of claim 2 or 4, wherein: the second electromagnetic valve (7) is arranged on a connecting pipeline between the second sub-runner (12) and the anti-freezing water outlet (2).
6. The adaptive drain freeze protection gas water heater of claim 4, wherein: the engine body (1) is also internally provided with a combustion chamber (14) acting on the heat exchanger (13), and high-temperature flue gas generated by the combustion chamber (14) acts on the heat exchanger (13) to heat cold water entering the heat exchanger (13).
7. The adaptive drainage freeze protection gas water heater of claim 1, wherein: be equipped with the wiFi module on main control board MCU (4), the wiFi module carries out automatically controlled connection through the lead wire with main control board MCU (4), and external information display terminal is connected through the wiFi module to gas heater, and external information display terminal carries out information intercommunication through the wiFi module with gas heater to acquire gas heater's working information.
8. The adaptive drain freeze protection gas water heater of claim 7, wherein: the temperature sensor of the water flow sensor (6) transmits a water temperature information signal to the main control board MCU (4), and the main control board MCU (4) transmits the water temperature information signal and the cold water signal information discharged from the anti-freezing water outlet (2) to the external information display terminal through the WiFi module.
9. The adaptive drainage freeze protection gas water heater of claim 1, wherein: the check valve (10) comprises a check valve body (15), a first cavity valve body (16) connected with one end of the check valve body (15), a second cavity valve body (17) connected with the other end of the check valve body (15), an elastically movable valve core (18) is arranged in the check valve body (15), a sealing piece (19) used for opening or closing the opening of the first cavity valve body (16) is arranged on the valve core (18), the valve core (18) moves towards the second cavity valve body (17) under the action of the fan (9) so as to open the opening of the first cavity valve body (16), and then the first cavity valve body (16) is communicated with the second cavity valve body (17), and flowing air entering the fan (9) enters the second cavity valve body (17) through the first cavity valve body (16) towards the check valve body (15).
10. The adaptive drain freeze protection gas water heater of claim 9, wherein: one end of the first cavity valve body (16) is connected with an air inlet of the fan (9) through a pipeline, and one end of the second cavity valve body (17) is connected with the first sub-runner (8) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320935993.6U CN219934262U (en) | 2023-04-23 | 2023-04-23 | Self-adaptive drainage anti-freezing gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320935993.6U CN219934262U (en) | 2023-04-23 | 2023-04-23 | Self-adaptive drainage anti-freezing gas water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219934262U true CN219934262U (en) | 2023-10-31 |
Family
ID=88486495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320935993.6U Active CN219934262U (en) | 2023-04-23 | 2023-04-23 | Self-adaptive drainage anti-freezing gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219934262U (en) |
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2023
- 2023-04-23 CN CN202320935993.6U patent/CN219934262U/en active Active
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