Branch circulation water heater, branch circulation water return device and water supply system design structure

Abstract

The utility model discloses a branch circulating water heater and a water return device, which comprise a multifunctional component arranged in a common water heater and the water return device, and a water return controller and a wireless switch which are arranged at the tail end of each water branch, the multifunctional assembly comprises a water inlet temperature sensor, a water pump, a check valve, a pressure sensor, a water storage electromagnetic valve, a water storage temperature sensor, a water outlet temperature sensor, a water storage pressure stabilizing tank, a three-way electromagnetic valve, a first water quantity sensor, a pressure reducing valve, an internal circulation electromagnetic valve, a first controller and an internal circulation pipeline. According to the utility model, the functions of branch water return, heating stopping, cooling and heating alternation eliminating, stable-pressure water supply and the like can be realized; the defects of an existing water heater and an existing water return device are overcome, the problems of non-circulating water return, local circulating water return, full-pipeline circulating water return, repeated circulating water return and low effective utilization rate of the return water are solved, the problem of alternate cooling and heating caused by restarting of the water heater after water return is finished and water consumption is interrupted is solved, and the problem that residual hot water in a pipeline cannot be utilized is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters and water return devices, in particular to a branch circulation water heater, a branch circulation water return device and a water supply system design structure. Background Art

[0002] Currently, the installation methods of household water heaters mainly adopt the following several schemes:

[0003] 1) For households without a water return pipeline, they use ordinary water heaters without a water return function and without installing a water return device;

[0004] 2) For households without a water return pipeline, they use ordinary water heaters and install a water return device, and install a one-way valve at the most distant washbasin to achieve water return in the main pipeline;

[0005] 3) For households without a water return pipeline, they use a zero - cold - water water heater with a self - contained water return function, and install a one - way valve at the most distant washbasin to achieve water return in the main pipeline;

[0006] 4) For households without a water return pipeline, they use a special water return device and install a plug - free constant - temperature valve at the vegetable - washing basin and washbasin at the end of each branch hot - water circuit to achieve water return in each branch;

[0007] 5) For households with a water return pipeline installed, all water - using points are connected in series for water supply, and a water return pipe is set at the most end to be connected to a zero - cold - water water heater or a water return device to achieve full - pipeline circulating water return;

[0008] 6) For households with a water return pipeline installed, only the main pipeline has circulating water return, and the ends of each branch water - using points do not have circulating water.

[0009] In Scheme 1, when using hot water, it is necessary to drain the cold water in the hot - water pipeline, which cannot save water, and it also takes a long time to get hot water, resulting in inconvenient use; when using water intermittently, it will cause the problem of cold - hot alternation due to the water heater shutting down and restarting; when the hot water is not used, the hot water remaining in the hot - water pipeline cannot be utilized, causing waste.

[0010] In Schemes 2 and 3, when starting the circulating water return, only the main pipeline has water return. When using water at the front end, it is necessary to drain the cold water in the branch pipeline, which cannot save water, and the hot water heated at the end cannot be utilized; when the water return heating ends or when using hot water intermittently, it will cause the problem of cold - hot alternation due to the water heater shutting down and restarting; when the hot water is not used, the hot water remaining in the hot - water pipeline cannot be utilized, causing waste.

[0011] In Scheme 4, when starting the circulating water return, water return in each branch is achieved, but some of the hot water heated by circulation cannot be utilized; when the water return heating ends or when using hot water intermittently, it will cause the problem of cold - hot alternation due to the water heater shutting down and restarting; when the hot water is not used, the hot water remaining in the hot - water pipeline cannot be utilized, causing waste.

[0012] In Solution 5, when starting the circulating return water, full-pipeline circulating return water is achieved. The hot water pipeline is relatively long, and the hot water heated by post-use-point circulation cannot be utilized. When the return water heating ends or hot water is used intermittently, it will cause the problem of cold and hot alternation when the water heater shuts down and restarts. When hot water is not in use, the hot water remaining in the hot water pipeline cannot be utilized, resulting in waste.

[0013] In Solution 6, when starting the circulating return water, only the main pipeline circulating return water is achieved. When using water, the cold water in each branch hot water pipeline still needs to be drained. The hot water heated by post-use-point circulation cannot be utilized. When the return water heating ends or hot water is used intermittently, it will cause the problem of cold and hot alternation when the water heater shuts down and restarts. When hot water is not in use, the hot water remaining in the hot water pipeline cannot be utilized, resulting in waste.

[0014] Moreover, the following deficiencies also exist in most of the above-mentioned return water systems:

[0015] 1. Remote control startup, with a single remote control. The water usage points are not fixed, and the remote control needs to be found before using hot water. 2. Timed startup, automatically heating and circulating during the set time period, or temperature control startup, 24-hour all-weather circulating heating, continuously consuming heat and energy. 3. Water flow switch startup, generally the water valve needs to be switched twice in 5 seconds to start. The interruption of water flow will cause the water heater to shut down and restart, and it is also easy to misoperate the cold and hot water valves to cause incorrect return water instructions, resulting in ineffective return water and wasting energy. 4. Connecting to Wifi, operating and controlling with a mobile phone APP. The operation of simple return water is too intelligent and complex, which is difficult to accept in terms of habit and not suitable for the general public to use. 5. For the return water system with a one-way valve at the end, only a delay stop can be set after startup. It is difficult to grasp the time. If the setting is short, the hot water has not reached the end one-way valve and the return water ends. If the setting is long, the hot water will flow into the cold water pipeline, not only causing energy waste, but also the temperature of both the cold and hot water pipelines is too high to be used when they are both hot water. 6. The return water pump is connected in series to the main water inlet pipe of the water heater. When it is not started, it will generate resistance and reduce the water pressure. 7. When the water consumption changes, there are obvious pressure differences and temperature differences at the end of water use.

[0016] In addition, a small number of residential designs have installed return water pipes. The pipeline length of full-pipeline circulating return water is about twice that of branch circulating return water, and the diameter of the front end of the hot water pipe is required to be above DN20, resulting in higher construction costs. At the same time, to meet the use of hot water at a certain point, the entire return water pipeline needs to be heated, consuming gas and electricity. In addition, due to the long return water pipeline, the return water time is relatively long. If it is timely water use, the waiting time is relatively long. And when using hot water at multiple points, the pressure and flow attenuation of series connection water supply are larger than those of conventional branch water supply, and the water distribution is uneven, with the front end being significantly greater than the rear end, which is not conducive to using hot water at multiple points. Therefore, the design scheme of the return water pipe is uneconomical and not practical. Utility Model Content

[0017] The purpose of the present utility model is to provide a branch circulating water heater and a branch circulating water return device. A water return controller and a wireless switch are configured at the end of each branch to achieve functions such as branch circulating water return, stop heating, eliminate cold and hot alternation, and stable water supply. At the same time, the water heater or water return device of the present utility model enables each branch pipeline to circulate water return separately or simultaneously, solves the water return defects of the existing water heaters and water return devices above, solves the problems of no circulating water return, partial circulating water return, full pipeline circulating water return, repeated circulating water return, and low effective utilization rate of water return. In addition, it also solves the problem of cold and hot alternation caused by the shutdown and restart of the water heater when hot water is not used after the water return heating is completed or when hot water is used intermittently, and can also solve the problem that the remaining hot water in the hot water pipeline cannot be utilized. Its operation is simple and convenient, saving water, electricity and gas, and has strong practicability.

[0018] To achieve the above object, the following technical solutions are adopted:

[0019] A branch circulating water heater includes a multi-functional component installed in a common water heater, as well as a water return controller and a wireless switch installed at the end of each water-using branch. The multi-functional component includes an inlet water temperature sensor, a water pump, a check valve, a pressure sensor, a water storage solenoid valve, a water storage temperature sensor, an outlet water temperature sensor, a water storage pressure stabilizing tank, a three-way solenoid valve, a first water volume sensor, a pressure reducing valve, an internal circulation solenoid valve, a first controller, a water volume servo, and an internal circulation pipeline; the inlet water temperature sensor is connected to the cold water inlet of the common water heater, and the water pump and the check valve are connected in parallel to the water inlet pipeline of the common water heater; one end of the pressure sensor is connected to the rear end of the water pump, and the other end of the pressure sensor is also connected to the water volume servo; the rear end of the water volume servo is connected to the water inlet end of the heat exchange component in the common water heater; the water outlet end of the heat exchange component is connected with a water storage pipeline and a non-water storage pipeline; the two ends of the water storage pipeline are respectively connected to the water outlet end of the heat exchange component and the first water inlet end of the three-way solenoid valve, and the water storage solenoid valve, the water storage temperature sensor, and the water storage pressure stabilizing tank are sequentially connected to the water storage pipeline; the two ends of the non-water storage pipeline are respectively connected to the water outlet end of the heat exchange component and the second water inlet end of the three-way solenoid valve, and the outlet water temperature sensor is connected to the non-water storage pipeline; the water outlet end of the three-way solenoid valve is connected to the hot water outlet of the common water heater; the first water volume sensor and the pressure reducing valve are sequentially connected to the pipeline between the water outlet end of the three-way solenoid valve and the hot water outlet of the common water heater; the two ends of the internal circulation pipeline are respectively connected to the second water inlet end of the three-way solenoid valve and the front end of the inlet water temperature sensor, and the internal circulation solenoid valve is connected to the internal circulation pipeline; the first controller is provided with a first wireless control receiving module.

[0020] Further, the return water controller includes a hot water inlet, a hot water outlet, a cold water outlet, a cold water inlet, a first temperature sensor, a one-way solenoid valve, a second water volume sensor, a second controller, and a first battery; the hot water inlet is used to connect to the hot water angle valve at the water-using end, and the hot water outlet is used to connect to the hot water hose of the cold and hot water valve at the water-using end; the cold water outlet is used to connect to the cold water hose of the cold and hot water valve at the water-using end, and the cold water inlet is used to connect to the cold water angle valve at the water-using end; the first temperature sensor is connected between the hot water inlet and the hot water outlet; the front end of the one-way solenoid valve is connected to the first temperature sensor and the hot water outlet, and the end of the one-way solenoid valve is connected to one end of the second water volume sensor; the other end of the second water volume sensor is connected to the cold water outlet and the cold water inlet; the second controller is provided with a temperature control module, a second wireless control receiving module, a first wireless control sending module, a sound module, a time delay relay, and a control panel.

[0021] Further, the wireless switch includes a return water start button, a stop heating button, a third controller, and a second battery; the third controller is provided with a second wireless control sending module and a voice control module; the first wireless control receiving module, the second wireless control receiving module, the first wireless control sending module, and the second wireless control sending module adopt any one of the following communication units: RF communication unit, Bluetooth communication unit, ZigBee communication unit.

[0022] Also provided is a branch circulating water return device, which includes a multifunctional component installed in a common water return device, and a water return controller and a wireless switch installed at the end of each water-using branch; the common water return device is installed at the front end of the water inlet of a common water heater, and the multifunctional component includes an inlet water temperature sensor, a water pump, a check valve, a pressure sensor, a water storage solenoid valve, a water storage temperature sensor, an outlet water temperature sensor, a water storage pressure stabilizing tank, a three-way solenoid valve, a first water volume sensor, a pressure reducing valve, an internal circulation solenoid valve, a first controller, a cold water inlet, a hot water outlet, an electromagnetic shut-off valve, a cold water outlet, a hot water inlet, and an internal circulation pipeline; the inlet water temperature sensor is connected to the cold water inlet of the water return device, and the water pump and the check valve are connected in parallel to the cold water inlet pipeline of the water return device; the pressure sensor is connected between the rear end of the water pump and the front end of the electromagnetic shut-off valve, and the rear end of the electromagnetic shut-off valve is connected to the cold water outlet of the water return device; the cold water outlet of the water return device is connected to the cold water inlet of the common water heater; the hot water inlet of the water return device is connected to the hot water outlet of the common water heater, and a water storage pipeline and a non-water storage pipeline are connected between the hot water inlet and the hot water outlet of the water return device; the two ends of the water storage pipeline are respectively connected to the hot water inlet of the water return device and the first inlet end of the three-way solenoid valve, and the water storage solenoid valve, the water storage temperature sensor, and the water storage pressure stabilizing tank are sequentially connected to the water storage pipeline; the two ends of the non-water storage pipeline are respectively connected to the hot water inlet of the water return device and the second inlet end of the three-way solenoid valve, and the outlet water temperature sensor is connected to the non-water storage pipeline; the outlet end of the three-way solenoid valve is connected to the hot water outlet of the water return device; the first water volume sensor and the pressure reducing valve are sequentially connected to the pipeline between the outlet end of the three-way solenoid valve and the hot water outlet of the water return device; the two ends of the internal circulation pipeline are respectively connected to the second inlet end of the three-way solenoid valve and the front end of the inlet water temperature sensor, and the internal circulation solenoid valve is connected to the internal circulation pipeline; the first controller is provided with a first wireless control receiving module.

[0023] Further, the water return controller includes a hot water inlet, a hot water outlet, a cold water outlet, a cold water inlet, a first temperature sensor, a one-way solenoid valve, a second water volume sensor, a second controller, and a first battery; the hot water inlet is used to connect to the hot water angle valve at the end of the water use, and the hot water outlet is used to connect to the hot water hose of the cold and hot water valve at the end of the water use; the cold water outlet is used to connect to the cold water hose of the cold and hot water valve at the end of the water use, and the cold water inlet is used to connect to the cold water angle valve at the end of the water use; the first temperature sensor is connected between the hot water inlet and the hot water outlet; the front end of the one-way solenoid valve is connected to the first temperature sensor and the hot water outlet, and the end of the one-way solenoid valve is connected to one end of the second water volume sensor; the other end of the second water volume sensor is connected to the cold water outlet and the cold water inlet; the second controller is provided with a temperature control module, a second wireless control receiving module, a first wireless control transmitting module, a sound module, a time delay relay, and a control panel.

[0024] Further, the wireless switch includes a return water start button, a stop heating button, a third controller, and a second storage battery; the third controller is provided with a second wireless control sending module and a voice control module; the first wireless control receiving module, the second wireless control receiving module, the first wireless control sending module, and the second wireless control sending module adopt any one of the following communication units: RF communication unit, Bluetooth communication unit, ZigBee communication unit.

[0025] Further, the water inlet of the water storage pressure stabilizing tank on the water storage pipeline is arranged at the upper end, and the water outlet of the water storage pressure stabilizing tank is arranged at the lower end. When using water, the water flows in a cycle, playing a role of buffering for constant temperature and constant pressure; when the return water heating is completed and hot water is not used or hot water is stopped, the cold and hot alternation elimination instruction is executed: start the water pump to first circulate the cold water in the non-water storage pipeline to the water inlet end of the water heater, then pressurize and store water in the water storage pressure stabilizing tank, and then the water heater stops heating; when the stored water temperature is greater than the set value and return water heating or intermittent hot water use is performed, the cold and hot alternation elimination instruction is executed: first supply water from the non-water storage pipeline, and when there is cold and hot alternation when the water heater starts, switch to supply water from the water storage pipeline, start the water pump to circulate the cold water to the water inlet end of the water heater, and then open the water storage solenoid valve to supply stable water from the water storage pipeline; when the first wireless control receiving module of the first controller receives the return water start instruction, if the water heater or the return water device is executing the stop heating instruction, the return water instruction is not executed; if the water heater or the return water device does not execute the stop heating instruction, the return water instruction is executed, the water pump is started to circulate the return water, and the cold and hot alternation elimination instruction is executed at the same time; during the return water circulation process, when the all return water completion instruction is received, the return water circulation ends, and the cold and hot alternation elimination instruction is executed at the same time.

[0026] Further, when the first wireless control receiving module of the first controller receives a stop heating instruction, when using hot water at multiple points, if the first water volume sensor feedback > the preset first water volume threshold or the return water instruction is being executed, the stop heating instruction is not executed; when using hot water at a single point or without water use, and the first water volume sensor feedback ≤ the preset first water volume threshold, the water heater or the return water device executes the stop heating instruction. The water heater disconnects the heating start module or the return water device acts to intercept the flow to stop the water heater from heating, and the hot water remaining in the hot water pipeline is utilized; when receiving a resume heating instruction, a reset is performed to resume heating of the water heater; the wireless switch can send a return water start instruction and a stop heating instruction to the return water controller through button operation or intelligent voice control via the second wireless control sending module; after the second wireless control receiving module of the return water controller receives the return water start instruction from the wireless switch, if the return water controller is executing a stop heating instruction or when the first temperature sensor feedback ≥ the preset first temperature threshold, the return water instruction is not executed; when the return water controller is not executing a stop heating instruction and the first temperature sensor feedback < the preset first temperature threshold, the return water instruction is executed, the sound module of the second controller emits a return water start voice, the first wireless control sending module sends a return water start instruction to the water heater or the return water device, and the one-way solenoid valve opens to start the return water of the water heater or the return water device; during the return water process, when the first temperature sensor feedback ≥ the preset first temperature threshold, the one-way solenoid valve resets and closes, the sound module of the second controller emits a return water completion voice, and the first wireless control sending module sends a return water completion instruction to the water heater or the return water device to end the return water of the water heater or the return water device.

[0027] Further, after the second wireless control receiving module of the return water controller receives the stop heating instruction from the wireless switch, if the return water controller is executing a return water instruction, the stop heating instruction is not executed; if the return water controller is not executing a return water instruction, the stop heating instruction is executed, the sound module of the second controller emits a stop heating voice, the first wireless control sending module sends a stop heating instruction to the water heater or the return water device, and the delay relay starts timing to stop the water heater or the return water device from heating; when the delay relay operates, the sound module of the second controller emits a resume heating voice, and the first wireless control sending module sends a resume heating instruction to the water heater or the return water device to resume heating of the water heater or the return water device.

[0028] A water supply system design structure is also provided. The indoor cold and hot water pipelines are designed with a tree-type pipe layout. The water supply main pipe is connected to the branch pipe systems in the kitchen and each bathroom area. Each branch hot water pipe is designed to be connected in series for water supply. The hot water points of the washbasin or the vegetable sink are at the end, which is convenient for installing the return water controller to execute the return water instruction and the stop heating instruction.

[0029] Adopting the above solution, the beneficial effects of the present utility model are:

[0030] 1) The problems described in Solution 1. When using hot water, there is no need to drain the cold water in the hot water pipeline, achieving zero cold water, saving water, providing real-time return water before using water, and the operation is quick and convenient; when using water intermittently, there will be no problem of hot and cold alternation due to the shutdown and restart of the water heater; when stopping using hot water, the hot water remaining in the hot water pipeline is utilized without causing waste.

[0031] 2) The problems described in Solution 2, Solution 3 and Solution 6. When starting the circulating return water, fixed-point circulation of each branch is achieved, achieving zero cold water, saving water, avoiding unnecessary circulating heating, and saving time, electricity and gas; when the return water heating ends or when using hot water intermittently, there will be no problem of hot and cold alternation due to the shutdown and restart of the water heater; when stopping using hot water, the hot water remaining in the hot water pipeline is utilized without causing waste.

[0032] 3) The problems described in Solution 4 and Solution 5. Fixed-point circulation of each branch is achieved, avoiding unnecessary circulating heating, and saving time, electricity and gas; when the return water heating ends or when using hot water intermittently, there will be no problem of hot and cold alternation due to the shutdown and restart of the water heater; when stopping using hot water, the hot water remaining in the hot water pipeline is utilized without causing waste.

[0033] At the same time, it can also solve the following deficiencies existing in most return water systems:

[0034] 1) Starting with a remote control, equipped with a single remote control, the water usage point is not fixed, and the remote control needs to be found before using hot water; compared with the solution of the present application, a wireless switch is set at the water usage place, and the operation is carried out through buttons or intelligent voice in real time, which is quick and convenient.

[0035] 2) Starting at a fixed time, automatically heating and circulating during the set time period; starting with a temperature controller, circulating heating all day long for 24 hours, continuously consuming heat and energy; compared with the solution of the present application, the water is returned and used at a fixed point in real time, without unnecessary return water and no waste.

[0036] 3) Starting with a water flow switch, generally the water valve needs to be switched twice in 5 seconds to start, and the interruption of water flow will cause the water heater to shut down and restart, and it is also easy to misoperate the cold and hot water valves to cause incorrect return water instructions, resulting in ineffective return water and wasting energy; compared with the solution of the present application, wireless technology and intelligent voice control are adopted, and the operation is convenient and reliable.

[0037] 4) Connecting to Wifi and operating and controlling through a mobile phone APP, the operation of simple return water is too intelligent and complicated, which is difficult to accept in terms of habits and is not suitable for the general public; compared with the solution of the present application, the operation is simple and convenient and suitable for the general population of the whole family, including the elderly and children.

[0038] 5) The return water system with a one-way valve at the end can only set a delayed stop after startup, and it is difficult to grasp the time. If set short, the return water ends before the hot water reaches the one-way valve at the end; if set long, the hot water will flow into the cold water pipe, not only causing energy waste, but also making it impossible to use when the cold and hot water pipes are both hot water. Compared with the solution of the present application, through the control of the temperature sensors at the ends of each branch, the return water is accurately controlled, and there is no situation of less return, more return, or water mixing.

[0039] 6) When the return water pump is connected in series to the main inlet pipe of the water heater (return water device), it will generate resistance and reduce the water pressure when not started. Compared with the solution of the present application, the return water pump is connected in parallel to the inlet pipe of the water heater (inlet pipe), and at any time, it will not generate resistance to reduce the water pressure.

[0040] 7) When the water consumption changes, there are obvious pressure differences and temperature differences at the end of water use. Compared with the solution of the present application, by using a water storage and pressure stabilizing tank for water supply, when the water consumption changes, due to the buffering effect of the water storage and pressure stabilizing tank, the obvious pressure differences and temperature differences at the end of water use are effectively reduced. Description of the Drawings

[0041] Figure 1 It is a schematic diagram of the actual application of the branch circulation water heater and the branch circulation return water device of the present utility model;

[0042] Figure 2 It is the water supply system diagram of the branch circulation water heater of the present utility model;

[0043] Figure 3 It is the water supply system diagram of the branch circulation return water device of the present utility model;

[0044] Figure 4 It is the structural schematic diagram of the branch circulation water heater of the present utility model;

[0045] Figure 5 It is the structural schematic diagram of the branch circulation return water device of the present utility model;

[0046] Figure 6 It is the structural schematic diagram of the return water controller of the present utility model;

[0047] Figure 7 It is the structural schematic diagram of the first perspective of the wireless switch of the present utility model;

[0048] Figure 8 It is the structural schematic diagram of the second perspective of the wireless switch of the present utility model;

[0049] Figure 9 It is the control principle flow chart of the first part of the present utility model;

[0050] Figure 10 It is the control principle flow chart of the second part of the present utility model;

[0051] Figure 11 It is the control principle flowchart of the third part of the present utility model;

[0052] Figure 12 It is the control principle flowchart of the fourth part of the present utility model;

[0053] Figure 13 It is the control principle flowchart of the fifth part of the present utility model;

[0054] Among them, the description of the attached drawing signs:

[0055] 12. Wireless switch; 13. Return water controller; 101. Inlet water temperature sensor; 102. Water pump; 103. Check valve; 104. Pressure sensor; 105. Water storage solenoid valve; 106. Water storage temperature sensor; 107. Outlet water temperature sensor; 108. Water storage pressure stabilizing tank; 109. Three-way solenoid valve; 110. First water volume sensor; 111. Pressure reducing valve; 112. Inner circulation solenoid valve; 113. First controller; 114. Water volume servo; 121. Return water start button; 122. Stop heating button; 123. Third controller; 124. Second battery; 131. Hot water inlet; 132. Hot water outlet; 133. Cold water outlet; 134. Cold water inlet; 135. First temperature sensor; 136. One-way solenoid valve; 137. Second water volume sensor; 138. Second controller; 139. First battery; 201. Cold water inlet; 202. Hot water outlet; 203. Electromagnetic shut-off valve; 204. Cold water outlet; 205. Hot water inlet. Specific embodiments

[0056] The present utility model will be described in detail below with reference to the attached drawings and specific embodiments.

[0057] Refer to Figures 1 to 13As shown, in one embodiment, the present utility model provides a branch circulating water heater, which includes a multi-functional component installed in a common water heater, as well as a return water controller 13 and a wireless switch 12 installed at the end of each water-using branch. The multi-functional component includes an inlet water temperature sensor 101, a water pump 102, a check valve 103, a pressure sensor 104, a water storage solenoid valve 105, a water storage temperature sensor 106, an outlet water temperature sensor 107, a water storage pressure stabilizing tank 108, a three-way solenoid valve 109, a first water volume sensor 110, a pressure reducing valve 111, an internal circulation solenoid valve 112, a first controller 113, a water volume servo device 114, and an internal circulation pipeline. The inlet water temperature sensor 101 is connected to the cold water inlet of the common water heater. The water pump 102 and the check valve 103 are connected in parallel to the water inlet pipeline of the common water heater. One end of the pressure sensor 104 is connected to the rear end of the water pump 102, and the other end of the pressure sensor 104 is also connected to the water volume servo device 114. The rear end of the water volume servo device 114 is connected to the water inlet end of the heat exchange component in the common water heater. The water outlet end of the heat exchange component is connected with a water storage pipeline and a non-water storage pipeline. The two ends of the water storage pipeline are respectively connected to the water outlet end of the heat exchange component and the first water inlet end of the three-way solenoid valve 109. The water storage solenoid valve 105, the water storage temperature sensor 106, and the water storage pressure stabilizing tank 108 are sequentially connected to the water storage pipeline. The two ends of the non-water storage pipeline are respectively connected to the water outlet end of the heat exchange component and the second water inlet end of the three-way solenoid valve 109. The outlet water temperature sensor 107 is connected to the non-water storage pipeline. The water outlet end of the three-way solenoid valve 109 is connected to the hot water outlet of the common water heater. The first water volume sensor 110 and the pressure reducing valve 111 are sequentially connected to the pipeline between the water outlet end of the three-way solenoid valve 109 and the hot water outlet of the common water heater. The two ends of the internal circulation pipeline are respectively connected to the second water inlet end of the three-way solenoid valve 109 and the front end of the inlet water temperature sensor 101. The internal circulation solenoid valve 112 is connected to the internal circulation pipeline. The first controller 113 is provided with a first wireless control receiving module.

[0058] Continue to refer to Figures 1 to 13As shown, in another embodiment, a branch circulating water return device is further provided, which includes a multifunctional component installed in a common water return device, and a water return controller 13 and a wireless switch 12 installed at the end of each water - using branch; the common water return device is installed at the front end of the water inlet of a common water heater; the multifunctional component includes an inlet water temperature sensor 101, a water pump 102, a check valve 103, a pressure sensor 104, a water storage solenoid valve 105, a water storage temperature sensor 106, an outlet water temperature sensor 107, a water storage pressure stabilizing tank 108, a three - way solenoid valve 109, a first water volume sensor 110, a pressure reducing valve 111, an internal circulation solenoid valve 112, a first controller 113, a cold water inlet 201, a hot water outlet 202, an electromagnetic shut - off valve 203, a cold water outlet 204, a hot water inlet 205, and an internal circulation pipeline; the inlet water temperature sensor 101 is connected to the cold water inlet 201 of the water return device, and the water pump 102 and the check valve 103 are connected in parallel to the cold water inlet pipeline of the water return device; the pressure sensor 104 is connected between the rear end of the water pump 102 and the front end of the electromagnetic shut - off valve 203, and the rear end of the electromagnetic shut - off valve 203 is connected to the cold water outlet 204 of the water return device; the cold water outlet 204 of the water return device is connected to the cold water inlet of the common water heater; the hot water inlet 205 of the water return device is connected to the hot water outlet of the common water heater, and a water storage pipeline and a non - water storage pipeline are connected between the hot water inlet 205 and the hot water outlet 202 of the water return device; the two ends of the water storage pipeline are respectively connected to the hot water inlet 205 of the water return device and the first inlet end of the three - way solenoid valve 109, and the water storage solenoid valve 105, the water storage temperature sensor 106, and the water storage pressure stabilizing tank 108 are sequentially connected to the water storage pipeline; the two ends of the non - water storage pipeline are respectively connected to the hot water inlet 205 of the water return device and the second inlet end of the three - way solenoid valve 109, and the outlet water temperature sensor 107 is connected to the non - water storage pipeline; the outlet end of the three - way solenoid valve 109 is connected to the hot water outlet 202 of the water return device; the first water volume sensor 110 and the pressure reducing valve 111 are sequentially connected to the pipeline between the outlet end of the three - way solenoid valve 109 and the hot water outlet 202 of the water return device; the two ends of the internal circulation pipeline are respectively connected to the second inlet end of the three - way solenoid valve 109 and the front end of the inlet water temperature sensor 101, and the internal circulation solenoid valve 112 is connected to the internal circulation pipeline; the first controller 113 is internally provided with a first wireless control receiving module.

[0059] In the above two embodiments, the return water controller 13 includes a hot water inlet 131, a hot water outlet 132, a cold water outlet 133, a cold water inlet 134, a first temperature sensor 135, a one-way solenoid valve 136, a second water volume sensor 137, a second controller 138, and a first storage battery 139; the hot water inlet 131 is used to connect to the hot water angle valve at the water-using end, and the hot water outlet 132 is used to connect to the hot water hose of the cold and hot water valve at the water-using end; the cold water outlet 133 is used to connect to the cold water hose of the cold and hot water valve at the water-using end, and the cold water inlet 134 is used to connect to the cold water angle valve at the water-using end; the first temperature sensor 135 is connected between the hot water inlet 131 and the hot water outlet 132; the front end of the one-way solenoid valve 136 is connected to the first temperature sensor 135 and the hot water outlet 132, and the end of the one-way solenoid valve 136 is connected to one end of the second water volume sensor 137; the other end of the second water volume sensor 137 is connected to the cold water outlet 133 and the cold water inlet 134; the second controller 138 is provided with a temperature control module, a second wireless control receiving module, a first wireless control transmitting module, a sound module, a time-delay relay, and a control panel, and the control panel can control the power supply, set the temperature, adjust the volume, and display information.

[0060] In the above two embodiments, the wireless switch 12 includes a return water start button 121, a stop heating button 122, a third controller 123, and a second storage battery 124; the third controller 123 is provided with a second wireless control transmitting module and a voice control module;

[0061] In the above two embodiments, the first wireless control receiving module, the second wireless control receiving module, the first wireless control transmitting module, and the second wireless control transmitting module of the branch circulation water heater adopt any one of the following communication units: RF communication unit, Bluetooth communication unit, ZigBee communication unit.

[0062] In the above two embodiments, the ordinary water heater is not limited to a gas (coal gas) water heater, and can also be an instant water heater such as an electric water heater, a wall-mounted boiler, etc.; the return water controller 13 is matched with a branch circulation water heater or a branch circulation return water device for use, and the return water controller 13 is generally installed in a washbasin or a vegetable washing basin cabinet; the wireless switch 12 is used to operate and control the return water controller 13 to work, and the wireless switch 12 is generally set at a convenient operation position in the bathroom or the kitchen. The wireless switch 12 can send a return water start instruction and a stop heating instruction to the return water controller 13 through button operation or intelligent voice control, so that its second wireless control transmitting module sends a return water start instruction and a stop heating instruction to the return water controller 13.

[0063] In the above two embodiments, when the pressure sensor 104 of the branch circulation water heater (return water device) feeds back < 0.02 MP (can be set), the water stop protection does not work; when the pressure sensor 104 feeds back ≥ 0.02 MP (can be set), it works normally.

[0064] In the above two embodiments, when using hot water, at the water-using location, press the return water start button 121 of the wireless switch 12, or use voice to wake up the voice control module of the third controller 123 to start the return water. The second wireless control sending module of the third controller 123 sends a return water instruction to the return water controller 13; when the use of hot water at a single point is about to stop, at the water-using location, press the stop heating button 122 of the wireless switch 12, or use voice to wake up the voice control module of the third controller 123 to stop heating (can be repeatedly woken up). The second wireless control sending module of the third controller 123 sends a stop heating instruction to the return water controller 13.

[0065] In the above two embodiments, when the second wireless control receiving module of the return water controller 13 receives the return water start instruction of the wireless switch 12, if the return water controller 13 is executing a stop heating instruction or when the first temperature sensor 135 feeds back ≥ the preset first temperature threshold (in a feasible embodiment, the first temperature threshold is 36°), the return water instruction is not executed; if the return water controller 13 has not executed the stop heating instruction and the first temperature sensor 135 feeds back < the preset first temperature threshold (in a feasible embodiment, the first temperature threshold is 36°), the return water instruction is executed. The sound module of the second controller 138 emits a return water start voice, and the first wireless control sending module sends a return water start instruction to the branch circulation water heater (return water device). The one-way solenoid valve 136 opens to start the return water of the water heater (return water device); during the return water process, when the first temperature sensor 135 feeds back ≥ the preset first temperature threshold (in a feasible embodiment, the first temperature threshold is 36°), the one-way solenoid valve 136 resets and closes. The sound module of the second controller 138 emits a return water completion voice, and the first wireless control sending module sends a return water completion instruction to the water heater (return water device) to end the return water of the water heater (return water device).

[0066] In the above two embodiments, when the second wireless control receiving module of the return water controller 13 receives the stop heating instruction of the wireless switch 12, if the return water controller 13 is executing a return water instruction, the stop heating instruction is not executed; if the return water controller 13 has not executed the return water instruction, the stop heating instruction is executed. The sound module of the second controller 138 emits a stop heating voice, and the first wireless control sending module sends a stop heating instruction to the branch circulation water heater (return water device). The delay relay starts timing (can be set to 45s) to stop the heating of the water heater (return water device); when the delay relay operates, the sound module of the second controller 138 emits a resume heating voice, and the first wireless control sending module sends a resume heating instruction to the branch circulation water heater (return water device) to resume the heating of the water heater (return water device).

[0067] In the above two embodiments, when the return water controller 13 executes the return water instruction, if the one-way solenoid valve 136 fails to open, the cold and hot water angle valve is closed, the water heater does not start heating, the water consumption at multiple positions is extremely large, or the stop heating instruction is being executed, the second water volume sensor 137 feeds back a no-water signal, the sound module of the second controller 138 issues an invalid return water voice, and the return water controller 13 resets; when the return water controller 13 finishes executing the return water instruction, if the one-way solenoid valve 136 fails to close, the second water volume sensor 137 feeds back a water use signal, and the first wireless control sending module of the second controller 138 sends a valve closing failure instruction to the branch circulating water heater (return water device).

[0068] In the above two embodiments, when the branch circulating water heater (return water device) receives the return water start instruction, if the water heater (return water device) is executing the stop heating instruction, it does not execute the return water instruction; if the water heater (return water device) does not execute the stop heating instruction, it executes the return water instruction, starts the water pump 102 for return water circulation, and simultaneously executes the instruction to eliminate cold and heat alternation; during the return water circulation process, when the full return water completion instruction is received and hot water has been used, the water pump 102 stops after a delay (5S); when hot water has not been used, the instruction to eliminate cold and heat alternation is executed.

[0069] In the above two embodiments, when the branch circulating water heater (return water device) receives the stop heating instruction, if hot water is used at multiple positions and the first water volume sensor 110 feeds back > the preset first water volume threshold (in a feasible embodiment, the first water volume threshold is 10 L / min) or the return water instruction is being executed, the stop heating instruction is not executed; if hot water is used at a single position or there is no water use and the first water volume sensor 110 feeds back ≤ the preset first water volume threshold (in a feasible embodiment, the first water volume threshold is 10 L / min), the water heater (return water device) executes the stop heating instruction, stops the water heater by disconnecting the heating start module of the water heater or by the action of the return water device to intercept the flow, and uses the hot water remaining in the hot water pipeline; when the branch circulating water heater (return water device) receives the resume heating instruction, it is reset to resume heating of the water heater.

[0070] In the above two embodiments, when the branch circulating water heater (return water device) executes the return water instruction or uses hot water, if the water storage temperature sensor 106 feedback < 38° (settable), the instruction to eliminate cold and hot alternation is not executed, and the water supply is stabilized by the water storage pipeline; when the branch circulating water heater (return water device) executes the return water instruction or uses hot water, if the water storage temperature sensor 106 feedback ≥ 38° (settable), the instruction to eliminate cold and hot alternation is executed. First, the non-water storage pipeline supplies water. When there is cold and hot alternation when the water heater starts, the three-way solenoid valve 109 resets and switches to supply water from the water storage pipeline. After opening the internal circulation solenoid valve 112 and starting the water pump 102 to circulate the cold water to the water heater inlet end, then open the water storage solenoid valve 105, and the water supply is stabilized by the water storage pipeline; when the water heater (return water device) receives the full return water completion instruction and does not use hot water or stops using hot water during the hot water use process, if the water storage temperature sensor 106 feedback ≥ 38° (settable), the instruction to eliminate cold and hot alternation is executed. Open the internal circulation solenoid valve 112 and start the water pump 102 to first circulate the cold water in the non-water storage pipeline (if any) to the water heater inlet end, then pressurize and store water in the water storage pipeline, the three-way solenoid valve 109 operates to switch to supply water from the non-water storage pipeline, and the water heater stops heating; when the branch circulating water heater (return water device) receives the full return water completion instruction and does not use hot water or stops using hot water during the hot water use process, if the water storage temperature sensor 106 feedback < 38° (settable), the instruction to eliminate cold and hot alternation is not executed, and the water heater (return water device) resets and stops working.

[0071] In the first embodiment above, when the branch circulating water heater executes the return water instruction or uses hot water, if the water heater fails to start heating, the water heater feedbacks a water heater heating fault, and the water heater resets and stops working; in the second embodiment above, when the branch circulating return water device executes the return water instruction or uses hot water, if the water heater fails to start heating, when the return water device does not execute the instruction to eliminate cold and hot alternation, the water storage temperature sensor 106 feedback < 38° (settable), or when the return water device executes the instruction to eliminate cold and hot alternation, the outlet water temperature sensor 107 feedback < 38° (settable), and the delay relay of the return water device operates, feedbacking a water heater heating fault, and the return water device resets and stops working.

[0072] In the above two embodiments, when the branch circulating water heater (return water device) executes the return water instruction, if the return water controller 13 fails to send or the water heater (return water device) fails to receive the return water completion instruction, the water volume servo 114 of the water heater feedbacks a no-water-use signal, or the first water volume sensor 110 of the return water device feedbacks a no-water-use signal, and the pressure sensor 104 feedbacks ≥ 0.5MP or ΔF < 0.05MP within 1s (settable), the water heater (return water device) feedbacks a return water fault, and the water heater (return water device) resets and stops working.

[0073] In the above two embodiments, when the branch circulation water heater (return water device) executes the return water instruction, if a valve closing failure instruction is received, or when the water inlet temperature sensor 101 feeds back ≥ 38° (can be set) (caused by the first temperature sensor 135 of the return water controller 13 mis-measuring low temperature), the water heater (return water device) feeds back a water cross-fault, the water heater (return water device) resets and does not work. After the return water controller 13 is repaired, the water cross-fault of the water heater (return water device) is reset, and the water heater (return water device) can work normally.

[0074] In the above two embodiments, when the branch circulation water heater (return water device) executes the stop heating instruction, if the return water controller 13 fails to send or the water heater (return water device) fails to receive the resume heating instruction, the time-delay relay operates, and the water heater (return water device) feeds back a resume heating signal fault, and the water heater (return water device) resets to resume heating.

[0075] In the above two embodiments, in the above embodiments, a branch circulation water heater or a branch circulation return water device is adopted. Households without a return water pipe can also control the return water through the controllers at the ends of each branch; the operation is simpler, more convenient and practical. It can realize the return water of each branch separately or simultaneously. The hot water circulation is in place and will not cross into the cold water pipe. When the return water ends or the water use is interrupted, it can avoid the problem of cold and hot water alternation after the water heater restarts. The single return water volume is small, the return water speed is fast, the hot water utilization rate is improved, and there is no redundant return water, only the most effective return water, which is the most time-saving, water-saving, power-saving and gas-saving, improving the user experience and saving energy. By disconnecting the heating start module of the water heater or the return water device acts as a throttling to stop the water heater from heating, the hot water stored in the hot water pipe can be used up without wasting hot water; when the water consumption changes, due to the buffering effect of the water storage and pressure stabilizing tank 108, the obvious pressure difference and temperature difference at the end of water use can be effectively reduced, improving the water use quality.

[0076] In addition, a water supply system design structure is also provided. For the indoor cold and hot water pipe design, the tree-type pipe laying is adopted. The water supply main pipe is connected to the branch pipe systems in the kitchen and each bathroom area. Each branch hot pipe is designed to be connected in series for water supply. The hot water point of the washbasin or the vegetable washing basin is the endmost, which is convenient for installing the return water controller 13 to execute the return water instruction and the stop heating instruction; this innovative design of the water supply system (see Figure 1 ) is beneficial to the hot water return water circulation. Without designing a return water pipe, zero cold water can be achieved at all points. The branch circulation utilization rate is high, the speed is fast, and energy is saved; it solves the problem that the local part at the end of the branch cannot circulate in the conventional tree-type pipe laying branch system; it solves the problems of long pipeline length, high cost, low return water utilization rate, large pipeline flow attenuation, uneven water distribution, slow return water speed, etc. in the return water system with a designed return water pipe; it can be applied to high-rise residences, villas and civil houses.

[0077] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A branch-circulation water heater, comprising a multifunctional component installed in a common water heater, and a return water controller and a wireless switch installed at the end of each water-using branch, characterized in that, The multifunctional component includes an inlet water temperature sensor, a water pump, a check valve, a pressure sensor, a water storage solenoid valve, a water storage temperature sensor, an outlet water temperature sensor, a water storage pressure stabilizing tank, a three-way solenoid valve, a first water volume sensor, a pressure reducing valve, an internal circulation solenoid valve, a first controller, a water volume servo, and an internal circulation pipeline; the inlet water temperature sensor is connected to the cold water inlet of a common water heater, and the water pump and the check valve are connected in parallel to the water inlet pipeline of the common water heater; one end of the pressure sensor is connected to the rear end of the water pump, and the other end of the pressure sensor is also connected to the water volume servo; the rear end of the water volume servo is connected to the water inlet end of the heat exchange component in the common water heater; the water outlet end of the heat exchange component is connected to a water storage pipeline and a non-water storage pipeline; the two ends of the water storage pipeline are respectively connected to the water outlet end of the heat exchange component and the first water inlet end of the three-way solenoid valve, and the water storage solenoid valve, the water storage temperature sensor, and the water storage pressure stabilizing tank are sequentially connected to the water storage pipeline; the two ends of the non-water storage pipeline are respectively connected to the water outlet end of the heat exchange component and the second water inlet end of the three-way solenoid valve, and the outlet water temperature sensor is connected to the non-water storage pipeline; the water outlet end of the three-way solenoid valve is connected to the hot water outlet of the common water heater; the first water volume sensor and the pressure reducing valve are sequentially connected to the pipeline between the water outlet end of the three-way solenoid valve and the hot water outlet of the common water heater; the two ends of the internal circulation pipeline are respectively connected to the second water inlet end of the three-way solenoid valve and the front end of the inlet water temperature sensor, and the internal circulation solenoid valve is connected to the internal circulation pipeline; the first controller is provided with a first wireless control receiving module.

2. The branch circulation water heater according to claim 1, wherein The return water controller includes a hot water inlet, a hot water outlet, a cold water outlet, a cold water inlet, a first temperature sensor, a one-way solenoid valve, a second water volume sensor, a second controller, and a first storage battery; the hot water inlet is used to connect to the hot water angle valve at the water using end, and the hot water outlet is used to connect to the hot water hose of the cold and hot water valve at the water using end; the cold water outlet is used to connect to the cold water hose of the cold and hot water valve at the water using end, and the cold water inlet is used to connect to the cold water angle valve at the water using end; the first temperature sensor is connected between the hot water inlet and the hot water outlet; the front end of the one-way solenoid valve is connected to the first temperature sensor and the hot water outlet, and the end of the one-way solenoid valve is connected to one end of the second water volume sensor; the other end of the second water volume sensor is connected to the cold water outlet and the cold water inlet; the second controller is provided with a temperature control module, a second wireless control receiving module, a first wireless control transmitting module, a sound module, a time delay relay, and a control panel.

3. The branch-circulation water heater according to claim 2, wherein, The wireless switch includes a return water start button, a stop heating button, a third controller, and a second storage battery; the third controller is provided with a second wireless control transmitting module and a voice control module; the first wireless control receiving module, the second wireless control receiving module, the first wireless control transmitting module, and the second wireless control transmitting module adopt any one of the following communication units: RF communication unit, Bluetooth communication unit, ZigBee communication unit.

4. A branch loop water return device, comprising a multifunctional component installed in a common water return device, and a water return controller and a wireless switch installed at the end of each water-using branch; the common water return device is installed at the front end of the water inlet of a common water heater, and is characterized in that, The multifunctional component includes an inlet water temperature sensor, a water pump, a check valve, a pressure sensor, a water storage solenoid valve, a water storage temperature sensor, an outlet water temperature sensor, a water storage pressure stabilizing tank, a three-way solenoid valve, a first water volume sensor, a pressure reducing valve, an internal circulation solenoid valve, a first controller, a cold water inlet, a hot water outlet, an electromagnetic shut-off valve, a cold water outlet, a hot water inlet, and an internal circulation pipeline; the inlet water temperature sensor is connected to the cold water inlet of the water return device, and the water pump and the check valve are connected in parallel to the cold water inlet pipeline of the water return device; the pressure sensor is connected between the rear end of the water pump and the front end of the electromagnetic shut-off valve, and the rear end of the electromagnetic shut-off valve is connected to the cold water outlet of the water return device; the cold water outlet of the water return device is connected to the cold water inlet of the ordinary water heater; the hot water inlet of the water return device is connected to the hot water outlet of the ordinary water heater, and a water storage pipeline and a non-water storage pipeline are connected between the hot water inlet and the hot water outlet of the water return device; the two ends of the water storage pipeline are respectively connected to the hot water inlet of the water return device and the first inlet end of the three-way solenoid valve, and the water storage solenoid valve, the water storage temperature sensor, and the water storage pressure stabilizing tank are sequentially connected to the water storage pipeline; the two ends of the non-water storage pipeline are respectively connected to the hot water inlet of the water return device and the second inlet end of the three-way solenoid valve, and the outlet water temperature sensor is connected to the non-water storage pipeline; the outlet end of the three-way solenoid valve is connected to the hot water outlet of the water return device; the first water volume sensor and the pressure reducing valve are sequentially connected to the pipeline between the outlet end of the three-way solenoid valve and the hot water outlet of the water return device; the two ends of the internal circulation pipeline are respectively connected to the second inlet end of the three-way solenoid valve and the front end of the inlet water temperature sensor, and the internal circulation solenoid valve is connected to the internal circulation pipeline; the first controller is provided with a first wireless control receiving module.

5. The branch circulating water return device according to claim 4, characterized in that The water return controller includes a hot water inlet, a hot water outlet, a cold water outlet, a cold water inlet, a first temperature sensor, a one-way solenoid valve, a second water volume sensor, a second controller, and a first battery; the hot water inlet is used to connect to the hot water angle valve at the water using end, and the hot water outlet is used to connect to the hot water hose of the cold and hot water valve at the water using end; the cold water outlet is used to connect to the cold water hose of the cold and hot water valve at the water using end, and the cold water inlet is used to connect to the cold water angle valve at the water using end; the first temperature sensor is connected between the hot water inlet and the hot water outlet; the front end of the one-way solenoid valve is connected to the first temperature sensor and the hot water outlet, and the end of the one-way solenoid valve is connected to one end of the second water volume sensor; the other end of the second water volume sensor is connected to the cold water outlet and the cold water inlet; the second controller is provided with a temperature control module, a second wireless control receiving module, a first wireless control transmitting module, a sound module, a time delay relay, and a control panel.

6. The branched circulating water return device according to claim 5, characterized in that, The wireless switch includes a return water start button, a stop heating button, a third controller, and a second battery; the third controller is provided with a second wireless control sending module and a voice control module; any one of the following communication units is adopted by the first wireless control receiving module, the second wireless control receiving module, the first wireless control sending module, and the second wireless control sending module: RF communication unit, Bluetooth communication unit, ZigBee communication unit.

7. A water supply system design structure, characterized in that, The indoor cold and hot water pipeline design adopts a tree-type pipeline layout. The main water supply pipe is connected to the branch pipeline systems in the kitchen and each bathroom area. Each branch hot water pipeline is designed to be connected in series for water supply. The hot water points of the washbasin or the vegetable washing basin are at the end, which is convenient for installing the return water controller to execute the return water instruction and the stop heating instruction.

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