Auto-induction pressurizing water return device

Abstract

The invention discloses an automatic induction pressurization water return device which drives cold water retained in a hot water pipe to flow back to a water heater to be heated through a cold water pipe through cooperative control of human body induction and temperature induction (human body approaching trigger starting and water temperature reaching standard trigger stopping), and an instant hot water circulation system is formed. The device is composed of a booster pump, a human body induction module, a temperature control module, a check valve and an integrated shell. A water outlet of the booster pump is connected with a cold water pipe through a check valve to form a one-way circulation loop; the human body induction module triggers the booster pump to start when detecting that a user approaches the water terminal to push cold water to flow back to the water heater for heating; the temperature control module monitors the water temperature in real time and cuts off the power supply to stop circulation after a threshold value is reached. The existing water pipe layout does not need to be transformed, backflow heating of the cold water retained in the hot water pipe is achieved by constructing the temporary circulation loop, instant heating is achieved, zero cold water discharge is achieved, the characteristics of being low in cost, high in adaptability and intelligent in control are achieved, and the method is suitable for indoor hot water system improvement scenes.

Description

Technical Field

[0001] The present invention relates to the field of hot water supply technology, and specifically to a pressurized water return device based on coordinated control of human body sensing and temperature sensing. It solves the problem of cold water reflux heating in the hot water pipe when the water heater is far away from the water terminal, achieves instant heating, and reduces water resource waste. Background Art

[0002] Currently, water heaters in indoor hot water systems are installed far from the water supply terminals. Many homes lack return pipes or are lacking return water recirculation heating. This necessitates manually draining the cold water from the hot water pipe between the water heater and the water supply terminal before each use. This not only compromises the user experience but also wastes water resources. For example, in a 90-square-meter home, the water heater is typically installed in the kitchen, approximately 20 meters from the bathroom showerhead's hot water pipe. This results in a shower requiring a 0.5-1 minute wait for hot water to be drawn, wasting approximately 5L of water. This prevents instant heating and creates the need to endure the cold weather while waiting for hot water. For hot water systems with return pipes, high-end water heaters with recirculation heating are required. However, these systems often use a timer or water temperature sensor at the water inlet to stop recirculation heating, causing continuous heating of the water in the return pipe and increasing energy consumption. Therefore, a low-cost, easy-to-install, and intelligent device that does not require modifications to existing water pipes is urgently needed.

[0003] The automatic sensing pressurized return water device of this invention is installed at the angle valve closest to the water terminal (such as the showerhead connection or the hot and cold water angle valve under the bathroom sink). The device's water inlet is connected to the hot water pipe, and the water outlet is connected to the cold water pipe, with one-way communication. The device's human body sensor is installed near the water terminal. When it senses a person approaching, the device automatically activates, directing cold water from the hot water pipe into the cold water pipe in a single direction, while the water flow drives the water heater. When the device's thermostat senses the incoming hot water, the device stops operation. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic sensing booster return water device, which, through dual sensing collaborative control and return water circulation design, can realize the reflux heating and automatic start-stop control of cold water retained in the hot water pipe without changing the existing water pipe layout, thereby realizing instant heating and forming an automatic sensing instant hot water system, which not only improves the hot water usage experience, but also saves water, electricity and gas resources.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] The automatic sensing booster return water device is mainly composed of a booster pump, a human body sensing module, a temperature control module, a check valve, and an integrated shell. The temperature control module, the human body sensing module and the booster pump are connected in series to form a dual-signal trigger control.

[0007] The booster pump is the power core. The water inlet is connected to the hot water pipe through a tee, the water outlet is connected to a check valve, and then connected to the cold water pipe through a tee. When powered on, it drives the water in the hot water pipe to flow back to the water heater through the cold water pipe, forming a one-way circulation loop.

[0008] The temperature control module includes a magnetic temperature probe and a digital thermostat. The magnetic temperature probe is attached to the booster pump's water inlet or outlet pipe to monitor the water temperature in real time. The digital thermostat has a preset start / stop water temperature threshold (T). When the water temperature is less than T, the power remains on; when the water temperature is greater than or equal to T, the power is cut off.

[0009] The human body sensing module includes a human body sensor and a human body sensing receiver. The human body sensor uses a wireless infrared sensor and is installed at a water terminal (such as next to a bathroom shower). When it detects a human body approaching, it sends a signal to the human body sensing receiver. The human body sensing receiver is connected to the booster pump. When it receives the signal from the human body sensor, it triggers the booster pump to start.

[0010] The check valve is installed at the water inlet or outlet of the booster pump. When it is forward-conducting, it allows the water in the hot water pipe to flow to the cold water pipe (heating stage). When it is reverse-conducting, it prevents the water in the cold water pipe from flowing into the hot water pipe (normal hot water use stage).

[0011] The integrated shell adopts a waterproof box body, with built-in booster pump, check valve, human body sensing receiver, temperature control module and other circuits, and reserved interfaces for external hot and cold water pipes.

[0012] Working principle of the present invention:

[0013] In the triggering stage, the temperature control module detects that the water temperature is less than T → the human body sensor detects that the user is approaching → sends a booster pump start signal → the water in the hot water pipe is pushed into the cold water pipe through the booster pump.

[0014] During the heating phase: the water heater detects water flow and ignites the heater to gradually fill the hot water pipe; the temperature control module detects the water temperature in real time.

[0015] During the stop phase: the temperature control module detects that the water temperature has risen to T → sends a signal to stop the booster pump → the gas water heater is shut off and stops heating → the user uses hot water directly.

[0016] Beneficial effects of the present invention:

[0017] By implementing the present invention, it can be adapted to most indoor hot water systems, and cold water discharge can be eliminated without changing the existing water pipe layout, thus saving a large amount of water resources; the device cost is low, and it has both high adaptability and economy.

[0018] Compared with existing solutions, the present invention supports dual-signal triggering (human body sensing + water temperature threshold), realizes automatic control, and avoids ineffective operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : Structural diagram of automatic induction pressurized water return device;

[0020] Figure 2 : Schematic diagram of the connection between the automatic induction pressurized water return device and the hot and cold water pipes;

[0021] Figure 3 : Implementation diagram of automatic induction pressurized water return device;

[0022] Figure 4 : Design drawing of the automatic sensing booster return water device shell. DETAILED DESCRIPTION

[0023] The present invention is composed of Figure 1 、 Figure 4 As shown, it consists of a booster pump 101, a human body sensing receiver 102, a human body sensor 103, a digital temperature controller 104, a magnetic temperature probe 105, a check valve 106, a housing 107, a power cord 108, and a power plug 109.

[0024] For the booster pump 101, a lift of ≥15 meters (suitable for high-rise water pressure), a power of 30-50W, support for power-on start / power-off stop, and a 4-point caliber for the water inlet and outlet; for the human body sensor 103, a wireless infrared sensor is selected, and the sensing distance is adjustable from 0.5 to 3 meters; the human body sensor receiver 102 can be paired with the human body sensor 103, and it will be powered on after receiving the signal, and the power-on state can be set; for the digital display thermostat 104, a digital display wired magnetic temperature probe 105 is selected, with a temperature measurement range of 0-99°C, an accuracy of ±0.5°C, and support for temperature threshold setting, which will power on when the temperature is greater than the threshold and power off when the temperature is less than the threshold; for the check valve 106, a 4-point caliber is selected; for the power cord 108 and the power plug 109, models with a power greater than the power of the booster pump are selected.

[0025] Housing 107 such as Figure 4 As shown, a waterproof plastic box body with a length of 180 mm × a width of 80 mm × a height of 150 mm is used. A circular slot slightly larger than the water inlet 110 of the booster pump is provided at the lower left side, a circular slot slightly larger than the check valve 106 is provided at the lower right side, and a slot slightly larger than the display screen of the digital display thermostat 104 is provided at the upper right side; a water leakage hole 401 is provided at the bottom to facilitate the installation process or the smooth discharge of water in case of leakage in the later stage.

[0026] Device packaging such as Figure 1 、 Figure 4As shown, the check valve 106 is installed on the booster pump outlet 112 and fixed to the bottom of the waterproof housing 107, the booster pump water inlet 110 is inserted into the circular slot at the bottom of the left side, and the check valve 106 is inserted into the circular slot at the bottom of the right side; the human body sensing receiver 102, the digital temperature controller 104, and the power plug 109 are connected through the power cord 108 to form a series control; the magnetic temperature probe 105 is fixed to the booster pump outlet 112 and is connected to the digital temperature controller 104 by wire; the digital temperature controller 104 is fixed to the display screen slot opened at the top of the right side; after the human body sensor 103 is paired with the human body sensing receiver 102, it is reserved outside the housing 107.

[0027] The device is connected to the hot and cold water pipes as follows Figure 2 As shown, the device 201 is installed at the angle valve of the hot and cold water pipes below the bathroom wash basin 206 near the shower head 204. The booster pump water inlet 110 is connected to the hot water pipe 202 of the water heater 205, and the check valve 106 at the water outlet is connected to the cold water pipe 203; the human body sensor 103 is installed near the shower head 204, and the installation position and angle are paid attention to, and it is only facing the bathing area.

[0028] The specific installation and implementation of the device is as follows Figure 3 As shown, the check valves 106 at the water inlet 110 and the water outlet of the device 201 are connected to the hot water pipe angle valve 303 and the cold water pipe angle valve 304 respectively through the water pipe 301 and the tee 302. The water flow direction 111 is from the hot water pipe angle valve 303 to the cold water pipe angle valve 304. The direction of the check valve 106 is consistent with the water flow direction 111; the other outlet of the tee 302 is connected to the faucet of the bathroom wash basin 206 without affecting the normal use of the wash basin 206; the power plug 109 of the device 201 is inserted into the panel 307 in the bathroom to power on the device 201.

[0029] Before use, the device parameters are set. The human body sensor 103 is set to the "short-distance sensing (0.5-1 meter)" mode to avoid false triggering; the human body sensing receiver 102 is paired with the human body sensor 103, and the power-on time is set to 1 minute; the digital display thermostat 104 is set to the start and stop water temperature threshold (T) greater than the cold water temperature after standing in the hot water pipe 202 (such as 25°C).

[0030] The digital thermostat 104 monitors the water temperature in real time through the magnetic temperature probe 105; when the water temperature is less than T, the digital thermostat 104 energizes the human body sensor receiver 102. When a person walks under the shower head 204 in the bathroom, the human body sensor 103 detects that someone is there and sends a start signal; after receiving the signal, the human body sensor receiver 102 energizes and starts the booster pump 101; the booster pump 101 pushes the cold water in the hot water pipe 202 into the cold water pipe 203; the water heater 205 detects the water flow from the cold water pipe 203 and ignites and heats it, and the heated hot water flows into the hot water pipe 202. The direction of water flow during the heating process is as follows: Figure 2 As shown by the black arrow in the middle and the dotted arrow 111 under the device 201. When the digital thermostat 104 detects that the water temperature has risen to the start-stop water temperature threshold (T) through the magnetic temperature probe 105, the power is cut off and the booster pump 101 stops working. Then the bathroom shower 204 can be turned on and used normally. The normal bathing water flow direction is as follows Figure 2 Indicated by black and white arrows.

[0031] Through the intelligent dual-control loop, the present invention combines human body sensing with water temperature threshold for the first time, realizing fully automatic control of "people enter water circulation, water heat circulation stops", which is different from the inefficient modes of traditional timed circulation or manual and remote control switches, and saves about 5L of water each time; the device is combined with the existing water heater and hot and cold water pipe layout to build a temporary circulation loop, breaking through the limitation of no return pipe (also applicable to the situation where a return pipe is laid), and forming an automatic sensing instant hot water system; the device is easy to install, does not require large-scale modification, and the total cost is less than 200 yuan, which lowers the threshold for installation and use.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any person skilled in the art can, without departing from the scope of the present invention, utilize the above-mentioned technical means and technical content to make many possible variations or modifications to the present invention's technical solution into equivalent embodiments with equivalent variations. Therefore, any equivalent variations made in accordance with the shape, structure, and principle of the present invention that do not depart from the content of the present invention's technical solution should be included within the scope of protection of the present invention.

Claims

1. Automatic induction booster water return device, characterized by It consists of a booster pump, a human body sensing module, a temperature control module, a check valve, and an integrated shell; the human body sensing module includes a human body sensor and a human body sensing receiver; the temperature control module includes a magnetic temperature probe and a digital display temperature controller.

2. The automatic induction pressurized water return device according to claim 1 is characterized in that The human body sensing module and the temperature control module are connected in series to form a dual-signal collaborative control of "human body sensing trigger start-water temperature sensing control stop".

3. The automatic induction pressurized water return device according to claim 1 is characterized in that The device is installed at the angle valve of the hot and cold water pipes of the water terminal accessories, and connects the hot water pipe and the cold water pipe respectively through a hose to build a temporary one-way circulation loop. There is no need to lay a dedicated return pipe, and at the same time prevents the water flow from the cold water pipe from flowing back into the hot water pipe.

4. The automatic induction pressurized water return device according to claim 1 is characterized in that Automatic control includes the following steps: (1) Initial state: The water temperature of the hot water pipe is less than the start-stop water temperature threshold (T), and the temperature control module is powered on; (2) Triggering stage: The human body sensor detects the user approaching → sends a signal to the human body sensor receiver → triggers the booster pump to start; (3) Heating stage: The booster pump pushes the cold water back → the water heater detects the water flow and ignites the water for heating; (4) Stop phase: The temperature control module detects that the water temperature is ≥T → the power supply of the booster pump is cut off → the user directly uses hot water.

5. The control method according to claim 4, characterized in that The automatic sensing booster return water device is used in conjunction with the existing water heater and hot and cold water pipe layout to form an automatic sensing instant hot water system, realizing the instant-on and instant-heating function at the water terminal.

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