CN112833546B - External pressurization system of water heater, control method and water heater with external pressurization system - Google Patents
External pressurization system of water heater, control method and water heater with external pressurization system Download PDFInfo
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- CN112833546B CN112833546B CN202010411045.3A CN202010411045A CN112833546B CN 112833546 B CN112833546 B CN 112833546B CN 202010411045 A CN202010411045 A CN 202010411045A CN 112833546 B CN112833546 B CN 112833546B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
The invention discloses an external pressurization system of a water heater, a control method and the water heater with the external pressurization system, wherein the external pressurization system comprises a water inlet connector and a water outlet connector; the pipeline is connected with the water inlet joint and the water outlet joint; the water pump is arranged on the pipeline and used for pressurizing water flow in the pipeline; the sensor is arranged on the pipeline and used for detecting relevant parameters of water flow in the pipeline; and the controller is respectively connected with the water pump and the sensor. According to the external water heater pressurization system, the control method and the water heater with the external water heater pressurization system, the external pressurization system is used for judging the arrangement of the relevant parameters of water flow, and the control is realized by detecting the far-end temperature of the pipeline instead of the detection, so that a faster and more comfortable use experience is provided for a user in use.
Description
Technical Field
The invention belongs to the technical field of household appliances, and particularly relates to an external water heater pressurization system, a control method and a water heater with the external water heater pressurization system.
Background
Along with the requirement of users for bathing water experience is improved, more and more users want to start the machine to use hot water and the water outlet flow is larger, so that a zero-cold-water function and a pressurization function are needed, and for the users who are installed with gas water heaters without pressurization and zero-cold-water functions, the same experience can be obtained only by replacing the gas water heaters, and the cost and the pressure are higher. The prior art has the defects that a water pump is integrated with a gas water heater and is not easy to replace for old users; after the circulation function is finished, the whole circulation pipeline is hot water, and when a user wants to use cold water, the hot water comes out, so that waste and complaints are caused; after a user closes water outlet in the middle of a bathing process, the water outlet is opened again, and a section of cold water can be generated in a pipeline due to the fact that a fan cleaning/ignition program needs to be executed again on the water heater, so that water using experience is influenced.
Chinese patent with application number CN201910063106.9 discloses a water path circulation system of a water heater, which comprises a water heater, a booster pump is arranged on a water outlet pipe of the water heater, an inlet pipe of the water heater is respectively connected with a water supply pipe and a return pipe, and the water path circulation system further comprises a stop device, wherein two ends of the stop device are respectively connected with the water outlet pipe and the return pipe, and are used for controlling the communication or the closing of the water outlet pipe and the return pipe.
Although the technical scheme that the water heater circularly prevents the temperature of water flow in the pipeline from becoming low is provided in the prior art, the control of the temperature has errors, temperature feedback is not carried out from a user end, ideal use experience cannot be provided for a user, and meanwhile the use requirement under a low-pressure environment cannot be met.
The present invention has been made in view of this situation.
Disclosure of Invention
The present invention is directed to overcoming the deficiencies in the art and providing an external pressurization system for a water heater that overcomes or at least partially solves the above mentioned problems.
The invention also aims to provide a control method of the external pressurization system of the water heater.
The invention aims to provide a water heater with the external water heater pressurization system and the control method of the external water heater pressurization system.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides an external pressurization system of a water heater, which comprises
A water inlet joint and a water outlet joint;
the pipeline is connected with the water inlet joint and the water outlet joint;
the water pump is arranged on the pipeline and used for pressurizing water flow in the pipeline;
the sensor is arranged on the pipeline and used for detecting relevant parameters of water flow in the pipeline;
and the controller is respectively connected with the water pump and the sensor.
The pipeline comprises a first branch pipe and a second branch pipe which are connected with the water outlet joint, and a water inlet pipe which is connected with the water inlet joint;
the water outlet joint comprises a hot water outlet joint connected with the first branch pipe and a cold water outlet joint connected with the second branch pipe, the hot water outlet joint is connected with the water inlet end of the water using terminal, and the cold water outlet joint is at least connected with the water inlet end of the water heater, so that the water flow in the system is shunted, and the low-temperature water flow flows back to the inside of the water heater to be heated.
Furthermore, a water path switch is arranged at the joint of the water inlet pipe and the first branch pipe and the joint of the second branch pipe, the water path switch is connected with the controller, and particularly, the on-off control of the first branch pipe and the second branch pipe is realized through the water path switch.
In addition, a water storage device used for reducing the temperature difference of water flow in the pipeline is arranged on the water inlet pipe;
the water flow in the water inlet pipe enters the water storage device, and enters the first branch pipe and/or the second branch pipe after heat exchange is carried out on the water flow and the water stored in the water storage device, and particularly, the water flow in the water inlet pipe is used for carrying out heat exchange on the water flow flowing through the water inlet pipe, so that the phenomenon that when cold water or hot water enters, the temperature of the water flow in the shell changes too fast, and the experience of the water using terminal is influenced is avoided;
further, still include the casing, set up as the shell of external pressure system of water heater.
The invention provides a control method of the external water heater pressurization system, which comprises the following steps: the sensor acquires water flow related parameters in the pipeline and sends the related parameters to the controller, the controller judges according to the related parameters, and if preset conditions are met, the controller sends a starting signal to the water pump.
Wherein the sensor comprises a temperature sensor for acquiring related information of water flow in the pipeline, the temperature sensor sends the related information of water flow to the controller, the controller judges the related information, the judging step is as follows,
if the preset conditions are met, the controller sends a heating signal to the water heater after sending a starting signal to the water pump, water flow in the pipeline flows back to the water heater from the water outlet connector to be heated, in detail, through collection of water flow related parameters, detection and control of water flow temperature in the system are achieved, and guarantee is provided for low-temperature water flow circulation heating.
Further, the relevant parameters include temperature information of water flow in the pipeline, and if the temperature information is lower than a set value, it is determined that a preset condition is met.
In addition, the sensor comprises a pressure sensor for acquiring relevant information of water flow in the pipeline, the pressure sensor sends the relevant information of the water flow to the controller, and the controller judges the relevant information, and the judging step is as follows,
if satisfy the preset condition, then the controller sends closing signal to water route switch, water route switch closes water connectors with behind the passageway of tube coupling, the controller to the water pump sends start signal, and is right rivers in the pipeline carry out the pressure boost, and in detail, through the collection to rivers relevant parameter, realized the detection and the control to rivers pressure in the system, when water pressure is low or when needing rivers circulation, through the start-up of water pump, realize the pressure boost to rivers.
Further, the relevant parameters include pressure information of water flow in the pipeline, and if the pressure information is lower than a set value, it is determined that a preset condition is met.
A water heater is provided with the external water heater pressurization system or adopts a control method of the external water heater pressurization system, the water outlet end of the water heater is connected with the water inlet joint, and the water inlet end of the water heater is connected with the water outlet joint.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects: according to the external water heater pressurization system, the control method and the water heater with the external water heater pressurization system, the external pressurization system is used for judging the discharge of the relevant parameters of water flow, and the control is realized by detecting the far-end temperature of the pipeline instead of the detection, so that a faster and more comfortable use experience is provided for a user in use.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments and that for a person skilled in the art, other drawings can also be derived from them without inventive effort.
In the drawings:
FIG. 1 is a schematic view of an external pressurization system of a water heater according to the present invention;
FIG. 2 is a schematic diagram of the application of the external pressurization system of the water heater of the present invention.
In the figure: 1. a water inlet joint; 2. a water outlet joint; 201. a hot water outlet joint; 202. a cold water outlet joint; 3. a water heater; 4. a water using terminal; 5. a water pump; 6. a sensor; 7. a controller; 8. a first branch pipe; 9. a second branch pipe; 10. a water inlet pipe; 11. a waterway switch; 12. a water reservoir; 13. a housing; 14. a hot water pipe; 15. a cold water pipe; 16. and the water inlet communicating pipe.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic view of an external water heater pressurization system according to the present invention, and it can be seen from the figure that the external water heater pressurization system according to the present invention includes a housing 13, and a water inlet joint 1 and a water outlet joint 2 which are arranged on the housing 13, where the water outlet joint 2 includes a hot water outlet joint 201 and a cold water outlet joint 202, and a water inlet pipe 10, a first branch pipe 8, and a second branch pipe 9 which are respectively connected to the water inlet joint 1, the hot water outlet joint 201, and the cold water outlet joint 202 are arranged inside the housing 13.
The water inlet pipe 10 is connected with the water outlet end of the water heater 3, the first branch pipe 8 is connected with the water inlet end of the user terminal, the second branch pipe 9 is connected with the water inlet end of the water heater 3, and when the temperature of water flow in the pipeline is lower than a preset value, a circulating water path is formed to heat the water flow in the pipeline.
Further, still be provided with sensor 6 and controller 7 in the casing 13, controller 7 passes through sensor 6 acquires the rivers relevant parameter in the pipeline, when the preset condition takes place, triggers the circulation heating of rivers or carries out the pressure boost to rivers, and this in-process all passes through set up in the casing 13 controller 7 realizes controlling, for example among the rivers circulation process, controller 7 judges that the rivers temperature is lower, when needing circulation heating, the corresponding pipeline of switching, and to water heater 3 sends heating signal, sets up like this and makes the detection and the feedback to rivers temperature in the pipeline more timely water terminal 4 department can in time make the feedback, avoids the delay phenomenon of the rivers heating in the pipeline, has promoted user's experience.
Further, still include the switching the waterway switch 11 of first branch pipe 8 with second branch pipe 9, and set up in water pump 5 on inlet tube 10, water pump 5 provides the pressure boost of rivers for water cycle or with water terminal 4.
Further, a water storage device 12 is further arranged in the housing 13 and used for exchanging heat with water flowing through the water inlet pipe 10, so that when cold water or hot water enters, the temperature of the water flowing through the housing 13 changes too fast, which results in affecting the experience of the water terminal 4.
Fig. 2 is an application schematic diagram of an external water heater pressurization system, and it can be seen from the application schematic diagram that the external water heater pressurization system of the present invention is disposed in a water path, the housing 13 is externally connected with three water pipes, including a hot water pipe 14, a cold water pipe 15 and a water inlet communicating pipe 16, as shown in fig. 1, the water inlet connector 1 is connected with a water outlet end of the water heater 3 through the water inlet communicating pipe 16, the water outlet connector 201 is connected with the water using terminal 4 through the hot water pipe 14, the cold water outlet connector 202 is communicated with a water inlet end of the water heater 3 through the cold water pipe 15, when it is detected that a water flow temperature in a pipeline in the housing 13 is lower than a preset value, the water flows back to the water heater 3 through the cold water pipe 15 to be heated, wherein a back flow heating signal comes from the controller 7 in the housing 13, in the present invention, water flowing in the cold water pipe 15 is water at a temperature lower than the preset value, and the cold water pipe 15 serves as a water return pipeline to guide the water flow at a temperature lower than the preset value back to the water heater 3 to be heated.
According to the external water heater pressurization system and the control method of the external water heater pressurization system, the external pressurization system carries out discharge judgment on the related parameters of water flow, and control is not realized by detecting the far-end temperature of a pipeline, so that a faster and more comfortable use experience is provided for a user in use, and when the external water heater pressurization system is applied to a specific scheme, the following steps are carried out.
In one embodiment, as shown in fig. 1 and fig. 2, the external pressurization system of a water heater according to the present invention comprises a water inlet joint 1 for connecting with a water outlet end of a water heater 3; the water outlet connector 2 is used for being connected with a water using terminal 4 and a water inlet end of the water heater 3 respectively; the pipeline is connected with the water inlet joint 1 and the water outlet joint 2; the water pump 5 is arranged on the pipeline and used for pressurizing water flow in the pipeline; the sensor 6 is arranged on the pipeline and used for detecting relevant parameters of water flow in the pipeline; and the controller 7 is respectively connected with the water pump 5 and the sensor 6.
Wherein the pipeline comprises a first branch pipe 8 and a second branch pipe 9; the water outlet joint 2 comprises a hot water outlet joint 201 connected with the first branch pipe 8, and the hot water outlet joint 201 is connected with the water inlet end of the water terminal 4; and the cold water outlet joint 202 is connected with the second branch pipe 9, and the cold water outlet joint 202 is at least connected with the water inlet end of the water heater 3, so that water flow in the system is divided, and low-temperature water flow flows back to the water heater 3 to be heated.
Furthermore, the pipeline also comprises a water inlet pipe 10 connected with the water inlet joint 1, and water flow at the water outlet end of the water heater 3 enters the water inlet pipe 10 from the water inlet joint 1.
Furthermore, a waterway switch 11 is arranged at the joint of the water inlet pipe 10 and the first branch pipe 8 and the second branch pipe 9, the waterway switch 11 is connected with the controller 7, and particularly, the on-off control of the first branch pipe 8 and the second branch pipe 9 is realized through the waterway switch 11.
In addition, the water inlet pipe 10 is provided with a water storage device 12 for reducing the temperature difference of water flow in the pipeline; the water in the water inlet pipe 10 enters the water storage device 12, and enters the first branch pipe 8 after exchanging heat with the water stored in the water storage device 12, and/or the second branch pipe 9, specifically, is used for exchanging heat with the water flowing through the water inlet pipe 10, so as to avoid that the temperature of the water in the housing 13 changes too fast when cold water or hot water enters, which may affect the experience of the water terminal 4;
further, the water heater further comprises a shell 13 which is arranged as a shell of the external pressurization system of the water heater.
In a specific embodiment, the control method of the external water heater pressurization system is applied to a water using terminal 4, wherein the water using terminal 4 is connected with the water outlet connector 2; the method comprises the following steps: the sensor 6 acquires related parameters of water flow in the pipeline and sends the related parameters to the controller 7, the controller 7 judges according to the related parameters, and if preset conditions are met, the controller 7 sends a starting signal to the water pump 5.
Wherein, the sensor 6 comprises a temperature sensor 6 for acquiring the related information of the water flow in the pipeline, the temperature sensor 6 sends the related information of the water flow to the controller 7, the controller 7 judges the related information, the judging steps are as follows,
if the preset conditions are met, the controller 7 sends a heating signal to the water heater 3 after sending a starting signal to the water pump 5, water flow in the pipeline flows back to the water heater 3 from the water outlet connector 2 to be heated, in detail, through collection of relevant water flow parameters, detection and control of water flow temperature in the system are achieved, and guarantee is provided for low-temperature water flow circulation heating.
Further, the relevant parameters include temperature information of water flow in the pipeline, and if the temperature information is lower than a set value, it is determined that a preset condition is met.
In a specific embodiment, the control method of the external water heater pressurization system is applied to a water using terminal 4, wherein the water using terminal 4 is connected with the water outlet connector 2; the method comprises the following steps: the sensor 6 acquires water flow related parameters in the pipeline and sends the related parameters to the controller 7, the controller 7 judges according to the related parameters, and if preset conditions are met, the controller 7 sends a starting signal to the water pump 5.
Wherein, the sensor 6 comprises a pressure sensor 6 for acquiring the related information of the water flow in the pipeline, the pressure sensor 6 sends the related information of the water flow to the controller 7, the controller 7 judges the related information, the judging steps are as follows,
if satisfy the preset condition, then controller 7 sends shut off signal to waterway switch 11, waterway switch 11 closes water connectors 2 with behind the passageway of tube coupling, controller 7 to water pump 5 sends start signal, right rivers in the pipeline carry out the pressure boost, and in detail, through the collection to rivers relevant parameter, realized the detection and the control to rivers pressure in the system, when water pressure is low or when needing rivers circulation, through the start-up of water pump 5, realize the pressure boost to rivers.
Further, the relevant parameters include pressure information of water flow in the pipeline, and if the pressure information is lower than a set value, it is determined that a preset condition is met.
In a specific embodiment, the water heater of the present invention is equipped with the external pressurization system of the water heater or a control method using the external pressurization system of the water heater, wherein the water outlet end of the water heater 3 is connected to the water inlet joint, and the water inlet end of the water heater 3 is connected to the water outlet joint (see fig. 2).
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Moreover, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments, not others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can combine the technical solutions and technical problems to be solved by the present application.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides an external pressure boost system of water heater which characterized in that: comprises that
The shell (13) is arranged as a shell of the water heater externally connected with a pressurization system;
the water inlet joint (1) and the water outlet joint (2) are arranged on the shell (13);
the pipeline is connected with the water inlet joint (1) and the water outlet joint (2);
the pipeline comprises a first branch pipe (8) and a second branch pipe (9) which are connected with the water outlet joint (2), and a water inlet pipe (10) which is connected with the water inlet joint (1) and is arranged in the shell (13);
the water outlet joint (2) comprises a hot water outlet joint (201) connected with the first branch pipe (8) and a cold water outlet joint (202) connected with the second branch pipe (9);
the water inlet joint is used for being communicated with a water outlet end of the water heater, the hot water outlet joint (201) is used for being communicated with a water using terminal, and the cold water outlet joint (202) is used for being communicated with a water inlet end of the water heater;
the water pump (5) is arranged on the water inlet pipe (10) and is used for pressurizing water flow in the pipeline;
the sensor (6) is arranged on the pipeline and used for detecting relevant parameters of water flow in the pipeline;
a water path switch (11) is arranged at the joint of the water inlet pipe (10) and the first branch pipe (8) and the second branch pipe (9), and the water path switch (11) is connected with a controller (7); the sensor (6) is arranged on the second branch pipe (9) and comprises a temperature sensor and a pressure sensor;
the controller (7) is respectively connected with the water pump (5) and the sensor (6), when the temperature of water flow obtained by the temperature sensor is lower than a preset value, the controller (7) sends an opening signal to a water path switch (11), when the controller (7) sends a starting signal to the water pump (5), the controller is used for sending a heating signal to the water heater (3), and the water flow in the pipeline flows back to the water heater (3) from the water outlet joint (2) to be heated;
when the pressure information of the water flow acquired by the pressure sensor is lower than a set value, the controller (7) sends a closing signal to the waterway switch (11), and the controller (7) sends a starting signal to the water pump (5) to pressurize the water flow in the pipeline.
2. The external water heater pressurization system according to claim 1, characterized in that:
the water inlet pipe (10) is provided with a water storage device (12) for reducing the temperature difference of water flow in the pipeline;
the water flow in the water inlet pipe (10) enters the water storage device (12) and enters the first branch pipe (8) and/or the second branch pipe (9) after being subjected to heat exchange with the water stored in the water storage device (12).
3. A method for controlling an external water heater pressurization system according to any one of claims 1-2, wherein the method comprises: the sensor (6) acquires water flow related parameters in the pipeline and sends the related parameters to the controller (7), the controller (7) judges according to the related parameters, and if preset conditions are met, the controller (7) sends a starting signal to the water pump (5).
4. The control method of the external water heater pressurization system according to claim 3, characterized in that:
the sensor (6) comprises a temperature sensor for acquiring related information of water flow in the pipeline, the temperature sensor sends the related information of the water flow to the controller (7), the controller (7) judges the related information, the judging step is as follows,
if the preset conditions are met, the controller (7) sends a heating signal to the water heater (3) after sending a starting signal to the water pump (5), and water flow in the pipeline flows back to the water heater (3) from the water outlet connector (2) to be heated.
5. The control method of the external water heater pressurization system according to claim 4, characterized in that: the related parameters comprise temperature information of water flow in the pipeline, and if the temperature information is lower than a set value, the condition that a preset condition is met is judged.
6. The control method of the external water heater pressurization system according to claim 5, characterized in that:
the sensor (6) comprises a pressure sensor for acquiring related information of water flow in the pipeline, the pressure sensor sends the related information of the water flow to the controller (7), the controller (7) judges the related information, the judging step is as follows,
if the preset conditions are met, the controller (7) sends a closing signal to a waterway switch (11), and after the waterway switch (11) closes a channel connected with the water outlet joint (2) and the pipeline, the controller (7) sends a starting signal to the water pump (5) to pressurize the water flow in the pipeline.
7. The control method of the external water heater pressurization system according to claim 6, characterized in that: the related parameters comprise pressure information of water flow in the pipeline, and if the pressure information is lower than a set value, the preset condition is judged to be met.
8. A water heater, which is provided with the external water heater pressurization system as claimed in any one of claims 1 to 2 or adopts the control method of the external water heater pressurization system as claimed in any one of claims 3 to 7, and is characterized in that: the water outlet end of the water heater (3) is connected with the water inlet connector (1), and the water inlet end of the water heater (3) is connected with the water outlet connector (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010411045.3A CN112833546B (en) | 2020-05-15 | 2020-05-15 | External pressurization system of water heater, control method and water heater with external pressurization system |
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| CN202010411045.3A CN112833546B (en) | 2020-05-15 | 2020-05-15 | External pressurization system of water heater, control method and water heater with external pressurization system |
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| GB2485162B (en) * | 2010-11-02 | 2015-12-16 | Energetix Genlec Ltd | Boiler Unit |
| CN102401471A (en) * | 2011-12-02 | 2012-04-04 | 苏州科博思流体科技有限公司 | Backflow type water-saving device |
| CN207146934U (en) * | 2017-08-28 | 2018-03-27 | 广东美的暖通设备有限公司 | It is pressurized backwater controller and water heater |
| CN207702743U (en) * | 2017-12-21 | 2018-08-07 | 广东万家乐燃气具有限公司 | Automatic-boosting hot water circulating device and its application system |
| CN109945494A (en) * | 2019-01-23 | 2019-06-28 | 青岛经济技术开发区海尔热水器有限公司 | A kind of water passage circulation system of water heater |
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