Mechanical fully automatic hot water pipe cold water recycling system and recycling method

Abstract

This invention discloses a fully automatic mechanical hot water pipe cold water recycling system and method, comprising: a hot water pipe, one end connected to a water heater and the other end equipped with a water outlet device; a first thermostatic valve installed on the hot water pipe; a connecting thin pipe, both ends connected to the two sides of the first thermostatic valve for balancing water pressure; a cold water recycling pipe installed on the hot water pipe between the water heater and the first thermostatic valve; a second thermostatic valve and a first externally controlled sequence valve sequentially installed on the cold water recycling pipe, the temperature control setting of the second thermostatic valve being the same as that of the first thermostatic valve; a pressure sensing device for the first externally controlled sequence valve located between the first thermostatic valve and the hot water outlet device; an elevated water tank equipped with an inlet and an outlet, the inlet being connected to the other end of the cold water recycling pipe; and a cold water utilization pipe, one end connected to the outlet and the other end equipped with a cold water outlet device. This invention can solve the problem of cold water waste in hot water pipes and is energy-saving and environmentally friendly.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water-saving technology, in particular to a mechanical full-automatic hot water pipe cold water recycling system and recycling method. BACKGROUND

[0002] Taking the commonly used hot water in production and life as an example, there is a certain distance between the set point and the use point of the water heater, and when using hot water, the cold water in the hot water pipe often needs to be discharged, causing water resource waste. Statistics show that the distance from the gas water heater in the kitchen to the shower faucet in the bathroom is calculated at an average of 6 meters, and about 8 liters of cold water is discharged before each shower. The cold water discharge during this waiting period, calculated by the number of households, results in a very large total amount of water waste.

[0003] In view of the problem of cold water discharge waste, the mainstream solution on the market at present is to increase the cold water recycling system of the return pipe and the return pump. Although this scheme can solve the problem of cold water discharge waste, it needs to increase the return pipe system and produce additional energy consumption (pump operation and solenoid valve control, etc.), and has the problems of complex pipe system, high operation cost, etc.

[0004] Therefore, based on the waste problem caused by the cold water discharge of the hot water pipe, combined with the pure mechanical power structure, a more effective and economical full-automatic, simple and practical cold water recycling system is established, which will have obvious benefits to the environment and economy.

[0005] Therefore, it is necessary to improve the prior art to solve the above problems. SUMMARY

[0006] The purpose of the present application is to disclose a mechanical full-automatic hot water pipe cold water recycling system and recycling method, which is used to solve the waste problem caused by the cold water discharge in the hot water pipe.

[0007] To achieve the above purpose, the present application provides the following technical solutions:

[0008] A mechanical full-automatic hot water pipe cold water recycling system, comprising:

[0009] a hot water pipe, one end of which is connected with a water heater, and the other end is provided with a hot water outlet device;

[0010] a first temperature control valve, which is arranged on the hot water pipe, the first temperature control valve is provided with a temperature control setting value, when the water temperature in the hot water pipe is higher than the temperature control setting value, the first temperature control valve is opened, otherwise it is closed;

[0011] a communication thin pipe, both ends of which are connected on both sides of the first temperature control valve, for balancing water pressure;

[0012] A cold water recovery pipe is arranged on the hot water pipe between the water heater and the first temperature control valve;

[0013] A second temperature control valve and a first external control sequence valve are arranged on the cold water recovery pipe in sequence along the water flow direction, the temperature control setting value of the second temperature control valve is the same as that of the first temperature control valve, when the water temperature is higher than the temperature control setting value, the second temperature control valve is closed, otherwise it is opened;

[0014] The pressure sensing device of the first external control sequence valve is arranged between the first temperature control valve and the hot water outlet device, when the water pressure is higher than the opening pressure of the first external control sequence valve, the first external control sequence valve is closed, otherwise it is opened;

[0015] A high-level water tank is provided with a water inlet and a water outlet, the water inlet is connected to the other end of the cold water recovery pipe;

[0016] A cold water utilization pipe is connected to the water outlet at one end and provided with a cold water outlet device at the other end.

[0017] Further, it further comprises:

[0018] A cold water pipe is connected to a cold water source at one end and connected to the cold water utilization pipe at the other end;

[0019] An internal control sequence valve is arranged on the cold water utilization pipe, the internal control sequence valve is opened or closed according to the water pressure before the valve;

[0020] A second external control sequence valve is arranged on the cold water pipe, the pressure sensing device of the second external control sequence valve is arranged on the cold water utilization pipe before the internal control sequence valve, the second external control sequence valve is closed or opened according to the water pressure at the pressure sensing device thereof.

[0021] Further, the high-level water tank is arranged higher than the hot water pipe and the cold water pipe.

[0022] Further, the temperature control setting value of the first temperature control valve and the second temperature control valve is 35℃.

[0023] Further, the control pressure of the first external control sequence valve is set to 0.01-0.03MPa.

[0024] Further, the control pressure of the second external control sequence valve and the internal control sequence valve is the difference between the bottom of the high-level water tank and the installation elevation of the internal control sequence valve.

[0025] Further, the water heater is any one of a gas water heater, an electric water heater, a wall-mounted stove water heater and an air energy water heater.

[0026] A hot water pipe cold water recycling method, comprising the following steps:

[0027] Step one, open the hot water outlet device, when the water temperature in the hot water pipe is lower than the first temperature control valve temperature setting value, the first temperature control valve remains closed state, the second temperature control valve remains open state, the first external control type sequence valve adjusts to open state when the pressure is less than before, the water temperature lower than the first temperature control valve temperature setting value enters the high-level water tank, when the water temperature in the hot water pipe reaches the first temperature control valve temperature setting value, the first temperature control valve adjusts to open state, the second temperature control valve adjusts to closed state, hot water flows out from the hot water outlet device;

[0028] Step two, when the high-level water tank stores cold water, the internal control type sequence valve adjusts to open state when the water pressure before the valve is greater than before, the second external control type sequence valve also adjusts to closed state when the water pressure is greater than before, the cold water outlet device is opened, and the recycled cold water flows out from the cold water outlet device, when the high-level water tank is empty, the internal control type sequence valve remains closed, and the second external control type sequence valve remains open state, at this time, the cold water from the cold water source flows out from the cold water outlet device.

[0029] Compared with the prior art, the hot water pipe cold water recycling method has the following beneficial effects:

[0030] (1) The hot water pipe cold water recycling method has the cold water recycling pipe, the cold water utilization pipe, the high-level water tank, the temperature control valve and the sequence valve, and the residual cold water in the hot water pipe can be recycled to the high-level water tank through the cooperation of the opening and closing of the sequence valve and the temperature control valve, the water in the high-level water tank can be recycled through the cold water utilization pipe, and therefore, the hot water pipe cold water recycling method can realize the recycling and recycling of the residual cold water in the hot water pipe.

[0031] (2) The hot water pipe cold water recycling method does not need to install a return pipe and a power supply line, has a simple and reliable structure, and has no leakage safety hazard.

[0032] (3) The hot water pipe cold water recycling method is a pure hydraulic mechanical structure design, and full-automatic cold water recycling and recycling can be realized only by relying on the water pressure of the pipe itself, without the need of an additional power device, without noise, energy saving and environmental protection.

[0033] (4) The hot water pipe cold water recycling method has small modification to the existing pipe system, is convenient to install, and can be hidden and installed in a ceiling and buried in a wall. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a system pipe structure schematic view of the present application.

[0035] Fig. 1: 1, first temperature control valve; 2, second temperature control valve; 3, first external control sequence valve; 4, second external control sequence valve; 5, internal control sequence valve; 6, high water tank; 7, water heater; 8, hot water pipe; 9, cold water pipe; 10, cold water recovery pipe; 11, cold water utilization pipe; 12, communication pipe; 13, hot water outlet device; 14, cold water outlet device. Embodiment

[0036] The present application will be described in detail below in connection with the embodiments shown in the drawings, but it should be noted that these embodiments are not a limitation on the present application, and equivalent transformations or substitutions of function, method, or structure made by those of ordinary skill in the art based on these embodiments are within the scope of the present application.

[0037] Please refer to Figure 1 A specific embodiment of a mechanical full-automatic hot water pipe cold water recovery and utilization system and recovery and utilization method of the present application is shown.

[0038] In the present application, the front and back are defined by the direction of water flow, with the upstream being the front and the downstream being the back.

[0039] A mechanical full-automatic hot water pipe cold water recovery and utilization system includes: hot water pipe 8, first temperature control valve 1, communication pipe 12, cold water recovery pipe 10, second temperature control valve 2, first external control sequence valve 3, high water tank 6.

[0040] One end of the hot water pipe 8 is connected to the water heater 7, and the other end is provided with a hot water outlet device 13, which can be adjusted to an open or closed state. When the hot water outlet device 13 is adjusted to be open, the water in the hot water pipe 8 can flow out from the hot water outlet device 13;

[0041] The first temperature control valve 1 is provided on the hot water pipe 8, and the first temperature control valve 1 can set a temperature setting value. When the water temperature before the first temperature control valve 1 is higher than the temperature setting value, the first temperature control valve 1 is opened. When the water temperature before the valve is lower than the temperature setting value, the first temperature control valve 1 is closed. In the prior art (Xingchong brass intelligent temperature control valve automatic constant temperature on-off valve), the temperature control valve has two types: the first type is low temperature opening and high temperature closing, and the temperature adjustment range is 20-65 degrees. For example, if the setting is 38 degrees, the water inlet temperature is less than 38 degrees, and the water inlet temperature is higher than 38 degrees. The second type is low temperature closing and high temperature opening, and the temperature adjustment range is 20-65 degrees. For example, if the setting is 38 degrees, the water inlet temperature is less than 38 degrees, and the water inlet temperature is higher than 38 degrees. The first temperature control valve 1 belongs to the second type.

[0042] The communication tube 12 is arranged on the hot water pipe 8, one end of which is connected to the position before the valve of the first temperature control valve 1, and the other end is connected to the position after the valve of the first temperature control valve 1. The communication tube 12 has a very small diameter, and is only used to balance the water pressure before and after the valve of the first temperature control valve 1.

[0043] The cold water recovery pipe 10 is connected to the hot water pipe 8 through a tee pipe, and the connection end is between the water heater 7 and the first temperature control valve 1.

[0044] The second temperature control valve 2 and the first external control type sequence valve 3 are arranged in sequence along the water flow direction of the cold water recovery pipe 10. The temperature control setting value of the second temperature control valve 2 is the same as that of the first temperature control valve 1. However, when the water temperature before the valve of the second temperature control valve 2 is higher than the temperature setting value, the second temperature control valve 2 is closed, and the first temperature control valve 1 is opened. When the water temperature before the valve is lower than the temperature setting value, the second temperature control valve 2 is opened, and the first temperature control valve 1 is closed. The second temperature control valve 2 belongs to the first type in the above-mentioned prior art.

[0045] The first temperature control valve 1 and the second temperature control valve 2 are arranged near the tee pipe for connecting the cold water recovery pipe 10 and the hot water pipe 8, so as to prevent the pipe distance from being too long and the heat loss of hot water from being too large, thereby causing the temperatures sensed by the two temperature control valves to be different.

[0046] The first external control type sequence valve 3 has a pressure sensing device arranged between the first temperature control valve 1 and the hot water outlet device 13. The first external control type sequence valve 3 is closed or opened according to the water pressure sensed by the pressure sensing device. In addition, when hot water is not used in a static state, the first external control type sequence valve 3 is used to prevent the cold water in the hot water pipe 8 from entering the high-level water tank 6 under the action of pressure.

[0047] The external control type sequence valve is prior art, which generally includes a control unit and a pressure sensing unit in communication with the control unit. The pressure sensing unit is used to sense the size of the external pressure, and transmit the sensed pressure to the control unit. When the pressure reaches or exceeds the closing pressure, the control unit adjusts the external control type sequence valve to a closed state, and vice versa.

[0048] The high-level water tank 6 is used to store the recovered cold water. The tank body is provided with a water inlet and a water outlet. The water inlet is connected to the other end of the cold water recovery pipe 10.

[0049] The cold water utilization pipe 11 has one end connected to the water outlet of the high-level water tank 6, and the other end is provided with a cold water outlet device 14.

[0050] In the initial state, the hot water outlet device 13 and the cold water outlet device 14 are in a closed state. When hot water is needed, the hot water outlet device 13 is opened, so that the pressure after the valve of the first temperature control valve 1 becomes smaller. Since the first temperature control valve 1 is provided with the communication tube 12 at both ends, the pressure before the valve of the first temperature control valve 1 also becomes smaller, and the water in the hot water pipe 8 flows to the position before the valve of the first temperature control valve 1.

[0051] If there is cold water left in the hot water pipe 8, the first temperature control valve 1 remains closed because the temperature of the cold water is lower than the set temperature value, and the second temperature control valve 2 remains open because the water temperature is lower than the set temperature value. The pressure sensing device of the first external control sequence valve 3 is arranged between the first temperature control valve 1 and the hot water outlet device 13. When the hot water outlet device 13 is opened, a small amount of cold water left at the end of the hot water pipe 8 flows out through the hot water outlet device 13. The small amount of cold water left before the first temperature control valve 1 flows out through the communication pipe (the resistance of the communication pipe is very large) and then from the hot water outlet device 13. The pressure sensing device of the first external control sequence valve 3 senses that the pressure is lower than the previous pipe water pressure, and the first external control sequence valve 3 is adjusted to the open state. The cold water left in the hot water pipe 8 enters the high-level water tank 6 under the action of water pressure, realizing cold water recovery. When the cold water left in the hot water pipe 8 all flows into the high-level water tank 6, the water temperature flowing through the hot water pipe 8 from the water heater 7 rises. Because the water temperature reaches the set temperature value, the first temperature control valve 1 senses the temperature rise and is adjusted to the open state, and the second temperature control valve 2 senses the temperature rise and is closed. At this time, the hot water pipe 8 and the hot water outlet device 13 form a passage, and hot water flows out from the hot water outlet device 13, starting to use hot water. When it is necessary to use the cold water in the high-level water tank 6, the cold water outlet device 14 is opened, and the cold water stored in the high-level water tank 6 flows out from the cold water outlet device 14 through the cold water utilization pipe 11, realizing re-use.

[0052] If the water left in the hot water pipe 8 is hot water, the second temperature control valve 2 is closed, the first temperature control valve 1 is opened, the hot water outlet device 13 is opened, and hot water flows out from the hot water outlet device 13.

[0053] As a preferred embodiment of the present application, the present application further comprises a cold water pipe 9, an internal control sequence valve 5, and a second external control sequence valve 4.

[0054] One end of the cold water pipe 9 is connected to a cold water source, and the other end is connected to the cold water utilization pipe 11 through a three-way pipe;

[0055] The internal control sequence valve 5 is installed on the cold water utilization pipe 11 and is opened or closed according to the size of the water pressure before the valve. The internal control sequence valve 5 is a prior art that directly uses the hydraulic pressure at the inlet before the valve to control the action of the valve core. When the pressure before the valve reaches or exceeds the opening pressure, the internal control sequence valve 5 is adjusted to the open state, and vice versa.

[0056] The second outer control sequence valve 4 is arranged on the cold water pipe 9, and the pressure sensing device thereof is arranged on the cold water utilization pipe 11 before the inner control sequence valve 5. The second outer control sequence valve 4 is closed or opened according to the pressure of the water at the pressure sensing device. The structure and working principle of the second outer control sequence valve 4 are the same as those of the first outer control sequence valve 3.

[0057] When the high-position water tank 6 stores cold water, the cold water flows before the inner control sequence valve 5, the pressure before the inner control sequence valve 5 is greater than the opening pressure of the inner control sequence valve 5, the inner control sequence valve 5 is adjusted to be in an open state, the second outer control sequence valve 4 senses that the water pressure before the inner control sequence valve 5 increases, and is adjusted to be in a closed state. The cold water outlet device is opened, and the cold water stored in the high-position water tank 6 flows out from the cold water outlet device through the cold water utilization pipe 11. When the high-position water tank 6 does not store cold water, compared with when the high-position water tank 6 stores cold water, the water pressure of the pipeline before the inner control sequence valve 5 decreases, the inner control sequence valve 5 is closed, the second outer control sequence valve 4 is opened, the cold water outlet device is opened, and the cold water flowing out from the cold water source is used.

[0058] As a preferred embodiment of the present application, the high-position water tank 6 is arranged at a position higher than the hot water pipe 8 and the cold water pipe 9.

[0059] As a preferred embodiment of the present application, the temperature setting values of the first temperature control valve 1 and the second temperature control valve 2 are the same, and can be set according to actual needs. The water temperature of hot water used in daily life is about 40-60℃, and the water temperature of tap water is about 10-30℃. The control water temperature can be set to about 35℃. When the water temperature in the hot water pipe 8 reaches 35℃, the first temperature control valve 1 is adjusted to be in an open state, and the second temperature control valve 2 is adjusted to be in a closed state.

[0060] As a preferred embodiment of the present application, the control pressure of the first outer control sequence valve 3 is set to 0.01-0.03MPa. When the pressure signal received by the first outer control sequence valve 3 is lower than 0.01-0.03MPa, the first outer control sequence valve 3 is adjusted to be in an open state.

[0061] As a preferred embodiment of the present application, the control pressure of the second outer control sequence valve 4 and the inner control sequence valve 5 is equal to the difference between the bottom of the high-position water tank 6 and the installation elevation of the inner control sequence valve 5.

[0062] As a preferred embodiment of the present application, the water heater 7 is any one of a gas water heater, an electric water heater, a wall-mounted boiler water heater, and an air energy water heater.

[0063] As a preferred embodiment of the present application, the hot water outlet device 13 and the cold water outlet device 14 are water taps.

[0064] A hot water pipe cold water recycling method, step one, when the water temperature in the hot water pipe 8 is lower than the temperature setting value of the first temperature control valve 1, the first temperature control valve 1 remains in a closed state, and the second temperature control valve 2 remains in an open state. The hot water outlet device 13 is opened, and because the pressure sensing device of the first external control type sequence valve 3 is arranged behind the first temperature control valve 1, compared with before the hot water outlet device 13 is opened, when the first external control type sequence valve 3 senses that the water pressure behind the first temperature control valve 1 is reduced, it is adjusted to an open state, and the cold water with a water temperature lower than the temperature setting value of the first temperature control valve 1 enters the high-level water tank 6, when the water temperature in the hot water pipe 8 reaches the temperature setting value of the first temperature control valve 1, the first temperature control valve 1 is adjusted to an open state, and the second temperature control valve 2 is adjusted to a closed state, the path is switched, and hot water flows out of the hot water outlet device 13. When the hot water is not used, the hot water outlet device 13 is closed, the water pressure in the hot water pipe 8 rises, and the first external control type pressure valve 3 is closed after sensing the pressure rising signal. At this time, the hot water pipe 8 still contains hot water, the first temperature control valve 1 remains in an open state, and the second temperature control valve 2 remains in a closed state. After a period of time, the hot water cools down, the first temperature control valve 1 is closed, and the second temperature control valve 2 is opened, and the initial default state is entered.

[0065] Step two, when the high-level water tank 6 stores cold water, the internal control type sequence valve 5 senses that the water pressure before the valve increases, and is adjusted to an open state, the pressure sensed at the second external control type sequence valve 4 is the same as the water pressure before the internal control type sequence valve 5, compared with when the high-level water tank 6 does not store cold water, the water pressure sensed by the second external control type sequence valve 4 increases, and is adjusted to a closed state, the cold water outlet device 14 is opened, and the cold water recycled to the high-level water tank flows out of the cold water outlet device 14, when the high-level water tank 6 is empty, the water pressure of the cold water utilization pipe 11 decreases, the internal control type sequence valve 5 remains closed, the second external control type sequence valve 4 remains open, and the path is switched. The cold water outlet device 14 is opened, and the cold water from the cold water source flows out of the cold water outlet device 14.

[0066] In order to reduce the loss of cold water after the first temperature control valve 1, the cold water recycling pipe 10 is installed as close to the hot water outlet device 13 as possible.

[0067] In the present application, the water pressure in all pipes can meet the pressure of the opening and closing of the first external control type sequence valve 3, the second external control type sequence valve 4, and the internal control type sequence valve 5.

[0068] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A mechanical full-automatic hot water pipe cold water recycling system, characterized in that, The utility model relates to a hot water supply system, comprising: a hot water pipe, one end of which is connected to a water heater and the other end of which is provided with a hot water outlet device; a first temperature control valve, which is arranged on the hot water pipe and is provided with a temperature control setting value, the first temperature control valve being opened when the water temperature in the hot water pipe is higher than the temperature control setting value and being closed otherwise; a communication pipe, two ends of which are respectively connected to the two sides of the first temperature control valve, for balancing water pressure; a cold water recovery pipe, one end of which is arranged on the hot water pipe between the water heater and the first temperature control valve; the cold water recovery pipe is sequentially provided with a second temperature control valve and a first externally controlled sequence valve along the water flow direction, the temperature control setting value of the second temperature control valve being the same as that of the first temperature control valve, the second temperature control valve being closed when the water temperature is higher than the temperature control setting value and being opened otherwise; the first externally controlled sequence valve is provided with a pressure sensing device between the first temperature control valve and the hot water outlet device, the first externally controlled sequence valve being closed when the water pressure is higher than the opening pressure of the first externally controlled sequence valve and being opened otherwise; a high-position water tank, which is provided with a water inlet and a water outlet, the water inlet being connected to the other end of the cold water recovery pipe; a cold water utilization pipe, one end of which is connected to the water outlet and the other end of which is provided with a cold water outlet device.

2. A mechanical full-automatic hot water pipe cold water recycling system according to claim 1, characterized in that, The utility model relates to a hot water supply system, comprising: a cold water pipe, one end of which is connected to a cold water source and the other end of which is connected to the cold water utilization pipe; an internally controlled sequence valve, which is arranged on the cold water utilization pipe and is opened or closed according to the water pressure before the valve; a second externally controlled sequence valve, which is arranged on the cold water pipe and is provided with a pressure sensing device on the cold water utilization pipe at a position before the internally controlled sequence valve, the second externally controlled sequence valve being closed or opened according to the water pressure at the position of the pressure sensing device.

3. A mechanical full-automatic hot water pipe cold water recycling system according to claim 2, characterized in that, The high-position water tank is arranged at a position higher than the hot water pipe and the cold water pipe.

4. The mechanical full-automatic hot water pipe cold water recycling system according to claim 2, characterized in that, The temperature control setting values of the first temperature control valve and the second temperature control valve are 35℃.

5. The mechanical full-automatic hot water pipe cold water recycling system according to claim 2, characterized in that, The control pressure of the first externally controlled sequence valve is set to 0.01-0.03MPa.

6. A mechanical full-automatic hot water pipe cold water recycling system according to claim 2, characterized in that, The control pressure of the second externally controlled sequence valve and the internally controlled sequence valve is the difference between the bottom of the high-position water tank and the installation elevation of the internally controlled sequence valve.

7. A mechanical full-automatic hot water pipe cold water recycling system according to claim 2, characterized in that, The water heater can be any one of a gas water heater, an electric water heater, a wall-mounted boiler water heater and an air energy water heater.

8. A hot water pipe cold water recycling method based on any one of the mechanical full-automatic hot water pipe cold water recycling systems according to claims 2 to 7, characterized in that, The utility model relates to a hot water supply system, comprising the following steps: Step one, the hot water outlet device is opened, when the water temperature in the hot water pipe is lower than the temperature setting value of the first temperature control valve, the first temperature control valve remains in a closed state, the second temperature control valve remains in an opened state, the first externally controlled sequence valve is adjusted to an opened state when the sensed pressure is lower than before, cold water with a water temperature lower than the temperature setting value of the first temperature control valve enters the high-position water tank, when the water temperature in the hot water pipe reaches the temperature setting value of the first temperature control valve, the first temperature control valve is adjusted to an opened state, the second temperature control valve is adjusted to a closed state, and hot water flows out from the hot water outlet device. Step two, when the high water tank stores cold water, the inner control sequence valve senses that the water pressure before the valve is larger than before, and adjusts to the open state, the second outer control sequence valve also senses that the water pressure is larger than before, and adjusts to the closed state, the cold water outlet device is opened, and the recovered cold water flows out from the cold water outlet device, when the high water tank is empty, the inner control sequence valve remains closed, and the second outer control sequence valve remains open, at this time the cold water from the cold water source flows out from the cold water outlet device.

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