CN201652814U - Water heater circulation and return device and system - Google Patents

Abstract

A water heater circulation and return device, which is arranged between the cold water inlet pipe and the water heater, is characterized in that it includes a casing, a controller, a motor arranged in the casing, a first solenoid valve and a second solenoid valve, and a The first water inlet connector, the second water inlet connector, the first water outlet connector, and the second water outlet connector on the motor are arranged on the pipeline connected to the first water inlet connector and the first water outlet connector; one end of the first solenoid valve is connected to the second water outlet connector. The water inlet joint is connected to the pipeline, and the other end is connected to the pipeline between the first water inlet joint and the motor; one end of the second solenoid valve is connected to the second water outlet joint, and the other end is connected to the first water outlet joint On the pipeline between the motor and the motor; the controller controls the opening and closing of the motor, the first solenoid valve and the second solenoid valve. Also disclosed is a water heater circulation return system. The system provides hot water as soon as the hot water faucet is turned on, saving water, gas and electricity; and can increase the outlet water pressure, which can improve the comfort of the water heater.

Description

Water heater circulation and return device and system

technical field

The utility model relates to the technical field of water heaters, in particular to a water heater circulation return device and system.

Background technique

At present, water heaters on the market can realize multi-point water supply. There can be 2, 3 or even more water points. The external piping system is relatively complicated and there are many waterways. Before the water heater works, the water in the external pipeline is cold water. When using hot water, you must first open the faucet to drain the remaining cold water in the hot water pipe. After the cold water is drained, the hot water will flow out. This process generally requires More than ten seconds. Therefore, existing water heaters have the following problems: 1. Waste of water, gas and electricity: the cold water in the pipeline generally cannot be used for bathing, and is generally directly discharged, resulting in waste of water resources; The hot water will be cooled slowly in the natural state, and will be discharged again when it is used next time. 2. Inconvenient to use: Since it takes more than ten seconds to discharge the cold water in the pipeline before use, it takes a long time to wait for use, which is not comfortable and convenient to use. 3. Insufficient water pressure often occurs in daily life, especially when the floor is used on a high floor, this phenomenon is more obvious. When the cold water passes through a long pipeline, many elbows, and the water heater, the water pressure loss is large, so that the pressure of the hot or cold water released from the faucet is small, and the water flow is slow, so the comfort during use is poor. .

Utility model content

The purpose of the utility model is to avoid the deficiencies in the prior art and provide a water heater circulating water return device and system which are convenient to use, energy-saving, comfortable for the water heater, and have hot water when the faucet is turned on.

The purpose of this utility model is achieved through the following technical measures:

The water heater circulation return device provided by the utility model is arranged between the cold water inlet pipe and the water heater. The first water inlet connector, the second water inlet connector, the first water outlet connector, and the second water outlet connector on the body, the motor is arranged on the pipeline connected to the first water inlet connector and the first water outlet connector; the first electromagnetic One end of the valve is connected to the second water inlet joint pipeline, and the other end is connected to the pipeline between the first water inlet joint and the motor; one end of the second solenoid valve is connected to the second water outlet joint pipeline, and the other end is connected to the pipeline between the first water inlet joint and the motor One end of the pipeline is connected to the pipeline between the first water outlet joint and the motor; the controller controls the opening and closing of the motor, the first solenoid valve and the second solenoid valve.

Preferably, the water heater circulating return device is further provided with a pressure sensor electrically connected to the controller, and the pressure sensor is arranged on the pipeline between the motor and the first water outlet joint.

Preferably, the water heater circulating return device is further provided with a water flow sensor electrically connected to the controller, and the water flow sensor is arranged on the pipeline between the motor and the first water outlet joint.

Preferably, the water heater circulating return device is further provided with a temperature sensor electrically connected to the controller, and the temperature sensor is arranged on the pipeline between the first solenoid valve and the second water inlet joint.

The present invention also provides a water heater circulating water return system, comprising a water heater provided with a water heater inlet pipe and a water heater outlet pipe, a cold water inlet pipe, a cold water faucet, and a hot water faucet. A water heater circulation return device, a one-way valve, a hot water pipe, a cold water pipe and a first water return pipe, the cold water inlet pipe is connected to the first water inlet joint, and the water heater water inlet pipe is connected to the first water outlet joint , the cold water tap is connected to the cold water pipe; both ends of the hot water pipe are respectively connected to the outlet pipe of the water heater and the inlet port of the one-way valve, and the hot water tap is connected to the hot water pipe; Both ends of the cold water pipe are respectively connected to the second water outlet joint and the outlet end of the one-way valve; one end of the first return water pipe is connected to the second water inlet joint, and the other end is connected to the cold water pipe.

Preferably, the water heater circulating return device is further provided with a pressure sensor electrically connected to the controller, and the pressure sensor is arranged on the pipeline between the motor and the first water outlet joint.

Preferably, the water heater circulating return device is further provided with a water flow sensor electrically connected to the controller, and the water flow sensor is arranged on the pipeline between the motor and the first water outlet joint.

Preferably, the water heater circulating return device is further provided with a temperature sensor electrically connected to the controller, and the temperature sensor is arranged on the pipeline between the first solenoid valve and the second water inlet joint.

Preferably, the water heater circulation return device is further provided with a temperature sensor electrically connected to the controller, and the temperature sensor is arranged on the hot water pipe.

The present invention also provides another circulating water return system for a water heater, which includes a water heater provided with a water heater inlet pipe and a water heater outlet pipe, a cold water inlet pipe, a cold water faucet, and a hot water faucet. A water heater circulation return device, a hot water pipe, a cold water pipe and a second return pipe, the cold water inlet pipe is connected to the first water inlet joint, the water heater water inlet pipe is connected to the first water outlet joint; the heat The two ends of the water pipe are respectively connected to the outlet pipe of the water heater and one end of the second return pipe, and the hot water faucet is connected to the hot water pipe; the other end of the second return pipe is connected to the second outlet pipe. joint connection; both ends of the cold water pipe are respectively connected with the second water outlet joint and the cold water faucet.

Compared with the prior art, the utility model has the following advantages: the controller of the water heater circulation return device and the system of the utility model controls the on-off of the motor and the first electromagnetic valve, and before using the water heater, it is automatically or manually opened by the controller. The motor, the first electromagnetic valve and the water heater, after the cold water is heated by the water heater, the circulation loop is circulated, so that the hot water pipe connected to the hot water faucet is filled with hot water, so when the hot water faucet is turned on, there is hot water, without the need In this way, the cold water in the hot water pipe is discharged before hot water comes out, which makes the water heater more convenient to use and saves water, gas and electricity; and because a motor is arranged in the water heater circulating return device, the water pressure of the faucet can be increased, and it is easier to use. comfortable.

Description of drawings

The utility model is further described by using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present utility model.

Fig. 1 is a schematic structural view of a water heater circulation return device of the present invention;

Fig. 2 is a structural schematic diagram of Embodiment 1 of a water heater circulation return system of the present invention;

Fig. 3 is a structural schematic diagram of Embodiment 2 of a water heater circulation return system of the present invention.

Detailed ways

The utility model is further described in conjunction with the following examples:

Below in conjunction with accompanying drawing, the utility model will be further described:

As shown in Figure 1, a water heater 15 circulating water return device 1 of the present utility model is arranged between the cold water inlet pipe 22 and the water heater 15, and the water heater 15 circulating water return device 1 includes a housing 2, a controller 13, a set The motor 3, the first solenoid valve 7 and the second solenoid valve 8 in the housing 2, the first water inlet connector 9, the second water inlet connector 11, the first water outlet connector 10, the second The water outlet joint 12 and the motor 3 are arranged on the pipeline connected between the first water inlet joint 9 and the first water outlet joint 10; one end of the first solenoid valve 7 is connected to the second water inlet joint 11 pipeline, and the other end pipeline is connected to the first water inlet joint 10. On the pipeline between the water inlet joint 9 and the motor 3; one end of the second electromagnetic valve 8 is connected to the pipeline of the second water outlet joint 12, and the other end pipeline is connected to the pipeline between the first water outlet joint 10 and the motor 3; the control The device 13 controls the opening and closing of the motor 3, the first solenoid valve 7 and the second solenoid valve 8.

The utility model water heater 15 circulating water return device 1 is arranged between the cold water inlet pipe 22 and the water heater 15, the motor 3 can be controlled by the controller 13 to open, and the water heater 15 heats the hot water in the pipeline. Thereby, the problem of waiting for the cold water in the pipeline to be discharged when using the water heater 15 is overcome, and the comfort of the water heater 15 is improved.

Preferably, the water circulation return device 1 of the water heater 15 is also provided with a pressure sensor 4 electrically connected to the controller 13 , and the pressure sensor 4 is provided on the pipeline between the motor 3 and the first water outlet joint 10 . The pressure sensor 4 can detect the water pressure in the pipeline. When the water pressure is not enough, the motor 3 can be controlled by the controller 13 to pressurize the pipeline. When the water pressure meets the demand, the controller 13 can stop the motor 3 running.

Preferably, the water circulation return device 1 of the water heater 15 is also provided with a water flow sensor 5 electrically connected to the controller 13 , and the water flow sensor 5 is arranged on the pipeline between the motor 3 and the first water outlet joint 10 . Whether the user is using water can be detected by detecting the water flow velocity in the pipeline through the water flow sensor 5 .

Preferably, the water heater 15 circulation return device 1 is also provided with a temperature sensor 6 electrically connected to the controller 13 , and the temperature sensor 6 is provided on the pipeline between the first solenoid valve 7 and the second water inlet joint 11 . The temperature of the water in the pipeline is detected by the temperature sensor 6, and the motor 3 can be switched on and off by the water temperature control.

The present invention also provides a water heater 15 circulating water return system, as shown in FIG. , the water heater 15 circulation return system also includes a water heater 15 circulation return device 1, a one-way valve 18, a hot water pipe 17, a cold water pipe 19 and a first return pipe 14, wherein,

The water heater 15 circulating water return device 1 includes a housing 2, a controller 13, a motor 3 disposed in the housing 2, a first solenoid valve 7 and a second solenoid valve 8, and a first water inlet valve disposed on the housing 2. Connector 9, the second water inlet connector 11, the first water outlet connector 10, the second water outlet connector 12, the motor 3 is arranged on the pipeline connected to the first water inlet connector 9 and the first water outlet connector 10; The second water inlet joint 11 is connected to the pipeline, and the other end is connected to the pipeline between the first water inlet joint 9 and the motor 3; one end of the second electromagnetic valve 8 is connected to the second water outlet joint 12, and the other end is connected to the pipeline The road is connected to the pipeline between the first water outlet joint 10 and the motor 3; the controller 13 controls the opening and closing of the motor 3, the first solenoid valve 7 and the second solenoid valve 8.

The cold water inlet pipe 22 is connected with the first water inlet joint 9, the water heater 15 water inlet pipe 16 is connected with the first water outlet joint 10, the cold water tap 21 is communicated with the cold water pipe 19; the two ends of the hot water pipe 17 are respectively connected with the water heater 15 outlet pipe 23 and the single Connect to the inlet of the valve 18, and the hot water faucet 20 communicates with the hot water pipe 17; the two ends of the cold water pipe 19 are respectively connected to the second water outlet joint 12 and the outlet of the one-way valve 18; one end of the first return pipe 14 is connected to the second water inlet Joint 11 is connected, and the other end communicates with cold water pipe 19.

Wherein, the hot water faucet 20 and the cold water faucet 21 can be set to one or more than one according to actual needs.

Preferably, the water circulation return device 1 of the water heater 15 is also provided with a pressure sensor 4 electrically connected to the controller 13 , and the pressure sensor 4 is provided on the pipeline between the motor 3 and the first water outlet joint 10 .

Preferably, the water circulation return device 1 of the water heater 15 is also provided with a water flow sensor 5 electrically connected to the controller 13 , and the water flow sensor 5 is arranged on the pipeline between the motor 3 and the first water outlet joint 10 .

Preferably, the water heater 15 circulation return device 1 is also provided with a temperature sensor 6 electrically connected to the controller 13 , and the temperature sensor 6 is provided on the pipeline between the first solenoid valve 7 and the second water inlet joint 11 . Certainly, the temperature sensor 6 can also be arranged on the hot water pipe 17 .

The pressure sensor 4, the water flow sensor 5 and the temperature sensor 6 respectively detect the pressure signal, the water flow signal and the temperature signal and send them to the controller 13; after the controller 13 processes the received signal, it sends a start or stop signal to the motor 3, and A conducting or closing signal is sent to the first solenoid valve 7 and the second solenoid valve 8 .

Specifically, the controller 13 can be installed on the water heater 15 circulating water return device 1, or can be independently installed in a place where it is easy to operate. The controller 13 includes four input terminals, one of which is connected to an external power supply, and the other three input terminals are respectively connected to the pressure sensor 4 , the water flow sensor 5 and the temperature sensor 6 . The controller 13 has functions such as system operating parameter display, temperature parameter setting, time parameter setting, operating mode setting, fault alarm, fault query, winter low temperature anti-freezing, etc., wherein the operating mode can be selected from different control modes according to the type of water heater 15 . The controller 13 can be controlled by means of manual control, automatic control, remote control and the like. After the motor 3 is started manually or by remote control, the controller 13 processes the signals detected by the pressure sensor 4 , the water flow sensor 5 and the temperature sensor 6 to determine when to stop the motor 3 from running.

The user can start the water heater 15 circulating water return device 1 manually or by remote control. The specific working process of the water heater 15 circulating water return system is: the controller 13 controls the first solenoid valve 7 to be powered on, the motor 3 is powered on, and the second solenoid valve 8 closed. Now water heater 15 starts according to the following situations: if the water heater 15 used is non-volume water heater 15, water heater 15 is opened; If the water heater 15 used is volume water heater 15, then water heater 15 decides whether to start according to its own control Specifically: if the temperature sensor 6 that comes with senses whether the water temperature is higher than a certain set value, if so, it will not start; if not, it will start automatically. Driven by the power of the motor 3, the cold water passes through the first water inlet joint 9, the motor 3, and the first water outlet joint 10 successively from the cold water inlet pipe 22, and then enters the water heater 15 for heating, and the hot water coming out of the water outlet pipe 23 of the water heater 15 passes through the hot water. The pipe 17 and the one-way valve 18 enter the first return pipe 14, and then pass through the second water inlet joint 11, the first solenoid valve 7, and the motor 3 along the pipeline, so that the circulation continues, and the hot water gradually fills the circulating return pipe , so that the hot water pipe 17 is filled with hot water, and when the hot tap is opened, hot water will flow out.

Therefore, before the user uses the hot water, the cold water is heated by the water heater 15 to be heated into hot water in advance, which solves the problem of waiting and wasting water when using hot water, and achieves the purpose of saving energy and water and reducing waiting time.

In addition, the controller 13 can automatically start or stop the motor 3 according to the water pressure parameters, that is, when the pressure sensor 4 detects that the water pressure is small, the motor 3 is started to increase the water pressure; when the pressure sensor 4 detects that the water pressure meets the conditions, the motor is turned off. 3. When the user turns on the hot water tap 20 to use water, the controller 13 automatically starts or stops the motor 3 according to the water pressure parameter, that is, when the pressure sensor 4 detects that the water pressure is small, the motor 3 is automatically started to increase the water pressure; When the pressure meets the conditions, the motor 3 is turned off; in this way, the outlet water pressure of the hot water faucet 20 can meet a certain pressure, so as to satisfy the user's water comfort requirements.

Similarly, when the user opens the cold water faucet 21, the controller 13 controls the first solenoid valve 7 to close and the second solenoid valve 8 to open, and the cold water flows out from the cold water inlet pipe 22 through the first water inlet joint 9, the motor 3, and the second solenoid valve. Electromagnetic valve 8, second water outlet joint 12, cold water pipe 19 and cold water faucet 21. The controller 13 automatically starts or stops the motor 3 according to the water pressure parameters, that is, when the pressure sensor 4 detects that the water pressure is small, the motor 3 is started to increase the water pressure; when the pressure sensor 4 detects that the water pressure meets the conditions, the motor 3 is turned off; The outlet water pressure of the cold water faucet 21 can meet a certain pressure, which can meet the user's water comfort requirements.

Of course, the user can also start or turn off the motor 3 manually. When the user uses cold water or hot water and finds that the water outlet pressure of the cold water faucet 21 or the hot water faucet 20 is not enough, the motor 3 is turned on manually, and the motor 3 provides the water pressure. The pipeline is pressurized; when it is found that the water pressure meets the user's requirements, the motor 3 is turned off manually.

When the user manually starts the water heater 15 circulating water return device 1 through the controller 13 or by remote control, the water return device 1 can be detected by the temperature sensor 6 to automatically stop the circulating water return. The specific working process is: when the temperature sensor 6 detects the water temperature in the pipe When the temperature is higher than the set value, the motor 3 stops running, the first solenoid valve 7 is closed, and the return water cycle ends. As an embodiment of the present invention, the temperature value can be 42° C., which is set on the controller 13 and can be flexibly adjusted within a certain range.

The user can also automatically start the water heater 15 through the controller 13 to circulate the water return device 1, specifically: the temperature sensor 6 is arranged on the hot water pipe 17, when the temperature sensor 6 detects that the water temperature in the hot water pipe 17 is lower than a certain setting When the temperature value is above 1, the first electromagnetic valve 7 is energized and opened, the motor 3 is energized to run, and the water heater 15 starts automatically (note: if it is a volumetric water heater 15, whether the water heater 15 starts is determined by its own control), and the water circulation starts. As an embodiment of the present invention, the temperature value can be 38° C., which is set on the controller 13 and can be flexibly adjusted within a certain range.

The user automatically starts the water heater 15 to circulate the water return device 1 through the controller 13. When the water flow sensor 5 detects that there is a water flow signal in the pipeline and lasts for more than 10 seconds, the time can be set according to needs. The motor 3 is powered on and the water heater 15 automatically Start (note: if it is a volumetric water heater 15, whether the water heater 15 starts is determined according to its own control). When there is no water flow signal and the water pressure value detected by the pressure sensor 4 is higher than the set value (eg: 0.15Mpa, this value can be set), the motor 3 stops running. During this process, the temperature signal detected by the temperature sensor 6 has no effect.

Since the water heater 15 circulating water return device 1 of the utility model is provided with the motor 3, the water heater 15 circulating water return device 1 has both the water circulating function and the cold/hot water boosting function.

The present invention also provides another water heater 15 circulating water return system, as shown in FIG. 20. The water heater 15 circulation return system also includes the water heater 15 circulation return device 1 as above, the hot water pipe 17, the cold water pipe 19 and the second return water pipe 24, wherein,

The water heater 15 circulating water return device 1 includes a housing 2, a controller 13, a motor 3 disposed in the housing 2, a first solenoid valve 7 and a second solenoid valve 8, and a first water inlet valve disposed on the housing 2. Connector 9, the second water inlet connector 11, the first water outlet connector 10, the second water outlet connector 12, the motor 3 is arranged on the pipeline connected to the first water inlet connector 9 and the first water outlet connector 10; The second water inlet joint 11 is connected to the pipeline, and the other end is connected to the pipeline between the first water inlet joint 9 and the motor 3; one end of the second electromagnetic valve 8 is connected to the second water outlet joint 12, and the other end is connected to the pipeline The road is connected to the pipeline between the first water outlet joint 10 and the motor 3; the controller 13 controls the opening and closing of the motor 3, the first solenoid valve 7 and the second solenoid valve 8.

The cold water inlet pipe 22 is connected with the first water inlet joint 9, and the water heater 15 water inlet pipe 16 is connected with the first water outlet joint 10; the two ends of the hot water pipe 17 are respectively connected with one end of the water heater 15 outlet pipe 23 and the second return pipe 24, and The hot water tap 20 communicates with the hot water pipe 17; the other end of the second return pipe 24 is connected with the second water outlet joint 12; the two ends of the cold water pipe 19 are respectively connected with the second water outlet joint 12 and the cold water tap 21.

Preferably, the water circulation return device 1 of the water heater 15 is also provided with a pressure sensor 4 electrically connected to the controller 13 , and the pressure sensor 4 is provided on the pipeline between the motor 3 and the first water outlet joint 10 .

Preferably, the water circulation return device 1 of the water heater 15 is also provided with a water flow sensor 5 electrically connected to the controller 13 , and the water flow sensor 5 is arranged on the pipeline between the motor 3 and the first water outlet joint 10 .

Preferably, the water heater 15 circulation return device 1 is also provided with a temperature sensor 6 electrically connected to the controller 13 , and the temperature sensor 6 is provided on the pipeline between the first solenoid valve 7 and the second water inlet joint 11 . Certainly, the temperature sensor 6 can also be arranged on the hot water pipe 17 .

The pressure sensor 4, the water flow sensor 5 and the temperature sensor 6 respectively detect the pressure signal, the water flow signal and the temperature signal and send them to the controller 13; after the controller 13 processes the received signal, it sends a start or stop signal to the motor 3, and A conducting or closing signal is sent to the first solenoid valve 7 and the second solenoid valve 8 .

Specifically, the controller 13 can be installed on the water heater 15 circulating water return device 1, or can be independently installed in a place where it is easy to operate. The controller 13 includes four input terminals, one of which is connected to an external power supply, and the other three input terminals are respectively connected to the pressure sensor 4 , the water flow sensor 5 and the temperature sensor 6 . The controller 13 has functions such as system operating parameter display, temperature parameter setting, time parameter setting, operating mode setting, fault alarm, fault query, winter low temperature anti-freezing, etc., wherein the operating mode can be selected from different control modes according to the type of water heater 15 . The controller 13 can be controlled by means of manual control, automatic control, remote control and the like. After the motor 3 is started manually or by remote control, the controller 13 processes the signals detected by the pressure sensor 4 , the water flow sensor 5 and the temperature sensor 6 to determine when to stop the motor 3 from running.

The user can start the water heater 15 circulating water return device 1 manually or by remote control. The specific working process of the water heater 15 circulating water return system is: the controller 13 controls the first solenoid valve 7 to be powered on, the motor 3 is powered on, and the second solenoid valve 8 closed. Now water heater 15 starts according to the following situations: if the water heater 15 used is non-volume water heater 15, water heater 15 is opened; If the water heater 15 used is volume water heater 15, then water heater 15 decides whether to start according to its own control Specifically: if the temperature sensor 6 that comes with senses whether the water temperature is higher than a certain set value, if so, it will not start; if not, it will start automatically. Driven by the power of the motor 3, the cold water passes through the first water inlet joint 9, the motor 3, and the first water outlet joint 10 successively from the cold water inlet pipe 22, and then enters the water heater 15 for heating, and the hot water coming out of the water outlet pipe 23 of the water heater 15 passes through the hot water. Pipe 17, the second return water pipe 24, and then pass through the second water inlet joint 11, the first solenoid valve 7, and the motor 3 along the pipeline in sequence, so that the circulation continues, and the hot water gradually fills the circulating return water pipe, so that the hot water pipe 17 It is filled with hot water, and hot water will flow out when the hot faucet is turned on.

Therefore, before the user uses the hot water, the cold water is heated by the water heater 15 to be heated into hot water in advance, which solves the problem of waiting and wasting water when using hot water, and achieves the purpose of saving energy and water and reducing waiting time.

In addition, the controller 13 can automatically start or stop the motor 3 according to the water pressure parameters, that is, when the pressure sensor 4 detects that the water pressure is small, the motor 3 is started to increase the water pressure; when the pressure sensor 4 detects that the water pressure meets the conditions, the motor is turned off. 3. When the user turns on the hot water tap 20 to use water, the controller 13 automatically starts or stops the motor 3 according to the water pressure parameter, that is, when the pressure sensor 4 detects that the water pressure is small, the motor 3 is automatically started to increase the water pressure; When the pressure meets the conditions, the motor 3 is turned off; in this way, the outlet water pressure of the hot water faucet 20 can meet a certain pressure, so as to satisfy the user's water comfort requirements.

Similarly, when the user opens the cold water faucet 21, the controller 13 controls the first solenoid valve 7 to close and the second solenoid valve 8 to open, and the cold water flows out from the cold water inlet pipe 22 through the first water inlet joint 9, the motor 3, and the second solenoid valve. Electromagnetic valve 8, second water outlet joint 12, cold water pipe 19 and cold water faucet 21. The controller 13 automatically starts or stops the motor 3 according to the water pressure parameter, that is, when the pressure sensor 4 detects that the water pressure is small, the motor 3 is started to increase the water pressure; when the pressure sensor 4 detects that the water pressure meets the conditions, the motor 3 is turned off; The outlet water pressure of the cold water faucet 21 can meet a certain pressure, which can meet the user's water comfort requirements.

Of course, the user can also start or turn off the motor 3 manually. When the user uses cold water or hot water and finds that the water outlet pressure of the cold water faucet 21 or the hot water faucet 20 is not enough, the motor 3 is turned on manually, and the motor 3 provides the water pressure. The pipeline is pressurized; when it is found that the water pressure meets the user's requirements, the motor 3 is turned off manually.

When the user manually starts the water heater 15 circulating water return device 1 through the controller 13 or by remote control, the water return device 1 can be detected by the temperature sensor 6 to automatically stop the circulating water return. The specific working process is: when the temperature sensor 6 detects the water temperature in the pipe When the temperature is higher than the set value, the motor 3 stops running, the first solenoid valve 7 is closed, and the return water cycle ends. As an embodiment of the present invention, the temperature value can be 42° C., which is set on the controller 13 and can be flexibly adjusted within a certain range.

The user can also automatically start the water heater 15 through the controller 13 to circulate the water return device 1, specifically: the temperature sensor 6 is arranged on the hot water pipe 17, when the temperature sensor 6 detects that the water temperature in the hot water pipe 17 is lower than a certain setting When the temperature value is above 1, the first electromagnetic valve 7 is energized and opened, the motor 3 is energized to run, and the water heater 15 starts automatically (note: if it is a volumetric water heater 15, whether the water heater 15 starts is determined by its own control), and the water circulation starts. As an embodiment of the present invention, the temperature value can be 38° C., which is set on the controller 13 and can be flexibly adjusted within a certain range.

The user automatically starts the water heater 15 to circulate the water return device 1 through the controller 13. When the water flow sensor 5 detects that there is a water flow signal in the pipeline and lasts for more than 10 seconds, the time can be set according to needs. The motor 3 is powered on and the water heater 15 automatically Start (note: if it is a volumetric water heater 15, whether the water heater 15 starts is determined according to its own control). When there is no water flow signal and the water pressure value detected by the pressure sensor 4 is higher than the set value (eg: 0.15Mpa, this value can be set), the motor 3 stops running. During this process, the temperature signal detected by the temperature sensor 6 has no effect.

Since the water heater 15 circulating water return device 1 of the utility model is provided with the motor 3, the water heater 15 circulating water return device 1 has both the water circulating function and the cold/hot water boosting function.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (10)

1. A water heater circulating water return device, which is arranged between the cold water inlet pipe and the water heater, is characterized in that it includes a housing, a controller, a motor arranged in the housing, a first solenoid valve and a second solenoid valve, and is arranged in The first water inlet connector, the second water inlet connector, the first water outlet connector, and the second water outlet connector on the housing, The motor is arranged on the pipeline connected to the first water inlet joint and the first water outlet joint; One end of the first solenoid valve is connected to the second water inlet joint pipeline, and the other end pipeline is connected to the pipeline between the first water inlet joint and the motor; One end of the second solenoid valve is connected to the second water outlet joint pipeline, and the other end pipeline is connected to the pipeline between the first water outlet joint and the motor; The controller controls the opening and closing of the motor, the first solenoid valve and the second solenoid valve. 2. A water heater circulating water return device according to claim 1, characterized in that: the water heater circulating water return device is also provided with a pressure sensor electrically connected to the controller, and the pressure sensor is arranged on the on the pipeline between the motor and the first water outlet joint. 3. A water heater circulation and return device according to claim 1, characterized in that: the water heater circulation and return device is also provided with a water flow sensor electrically connected to the controller, and the water flow sensor is arranged on the on the pipeline between the motor and the first water outlet joint. 4. A water heater circulating water return device according to claim 1, characterized in that: the water heater circulating water return device is also provided with a temperature sensor electrically connected to the controller, and the temperature sensor is arranged on the On the pipeline between the first solenoid valve and the second water inlet joint. 5. A water heater circulating return system, comprising a water heater provided with a water heater inlet pipe and a water heater outlet pipe, a cold water inlet pipe, a cold water faucet and a hot water faucet, characterized in that: the water heater return water circulation system also includes a The water heater circulation return device, one-way valve, hot water pipe, cold water pipe and first return pipe described in 1, The cold water inlet pipe is connected to the first water inlet joint, the water heater inlet pipe is connected to the first water outlet joint, and the cold water tap is connected to the cold water pipe; Both ends of the hot water pipe are respectively connected to the outlet pipe of the water heater and the inlet port of the one-way valve, and the hot water faucet is connected to the hot water pipe; Both ends of the cold water pipe are respectively connected to the second water outlet joint and the outlet end of the one-way valve; One end of the first water return pipe is connected to the second water inlet joint, and the other end is connected to the cold water pipe. 6. A water heater circulation return system according to claim 5, characterized in that: the water heater circulation return system is also provided with a pressure sensor electrically connected to the controller, and the pressure sensor is arranged on the on the pipeline between the motor and the first water outlet joint. 7. A water heater circulation return system according to claim 5, characterized in that: the water heater circulation return system is also provided with a water flow sensor electrically connected to the controller, and the water flow sensor is arranged on the on the pipeline between the motor and the first water outlet joint. 8. A water heater circulating water return system according to claim 5, characterized in that: the water heater circulating water return system is also provided with a temperature sensor electrically connected to the controller, and the temperature sensor is set on the On the pipeline between the first solenoid valve and the second water inlet joint. 9. A water heater circulating return system according to claim 5, characterized in that: the water heater circulating return system is also provided with a temperature sensor electrically connected to the controller, and the temperature sensor is arranged on the on the hot water pipe. 10. A water heater circulation and return system, comprising a water heater provided with a water heater inlet pipe and a water heater outlet pipe, a cold water inlet pipe, a cold water faucet and a hot water faucet, characterized in that: the water heater circulation return system also includes a The water heater circulation return device, hot water pipe, cold water pipe and second return water pipe described in 1, The cold water inlet pipe is connected to the first water inlet joint, and the water heater inlet pipe is connected to the first water outlet joint; Two ends of the hot water pipe are respectively connected to the outlet pipe of the water heater and one end of the second return pipe, and the hot water faucet communicates with the hot water pipe; The other end of the second water return pipe is connected to the second water outlet joint; Both ends of the cold water pipe are respectively connected to the second water outlet joint and the cold water faucet.

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