TW201908670A - Plumbing preheating system and control method thereof - Google Patents

Abstract

This invention provides a plumbing preheating system and a control method thereof. The pipe preheating system includes a hot water pipe connected to a water heater and a preheating device. The preheating device includes a water storage tank, a heater, an output module and a control module. The plumbing preheating system measure a work water content of the hot water pipe in a water measurement stage and calculate a require quantity of heat by the water content, the preset water temperature and the water temperature of the measurement stage, so as to make the heater heating the work water in the storage tank. Then, the output module mix the work water in the water storage tank and the work water in the hot water pipe to output the work water which temperature approaches the preset temperature.

Description

 Preheating pipeline system and control method thereof  

The invention relates to a preheating pipeline system and a control method thereof, which is a preheating pipeline system and a control thereof for preheating working water in a water storage tank so that the output working water reaches a preset outlet water temperature. method.

Please refer to the first figure, which shows a schematic plan view of a prior art water heater structure. As shown in the figure, in the prior art, a water heater PA1 includes a water heater body PA11, a water inlet pipe PA12, and a water outlet pipe PA13. The water inlet pipe PA12 and the water outlet pipe PA13 are both connected to the heater body PA11, and the water inlet pipe PA12 is connected to the water supply source, so that the user can use the cold water switch PA121 of the water inlet pipe PA12 to obtain cold water; When hot water is used, one of the hot water switch PA131 of the water discharge pipe PA13 can be controlled to supply hot water. Wherein, since the water heater body PA11 is generally burning gas to heat the water sent by the water inlet pipe PA12, when the user turns on the hot water switch PA131, it takes a period of time to feel the outflow of the hot water, resulting in the user. It is not possible to use hot water directly.

Please refer to the second figure, which is a schematic plan view showing the prior art water heater structure installation circulation line. As shown, a water heater PA2 includes a water heater body PA21, a water inlet pipe PA22, a water outlet pipe PA23, and a circulation pipe PA24. The water inlet pipe PA22 and the water outlet pipe PA23 are both connected to the water heater body PA21, and the water inlet pipe PA22 has a cold water switch PA221, and the water outlet pipe PA23 has a hot water switch PA231. In order to improve the problem that the water heater PA1 cannot supply hot water immediately, the prior art further connects the circulation pipeline PA24 to the water heater body PA21 and the water outlet pipeline PA23, thereby returning water through the circulation pipeline PA24, so that the water heater body PA21 can be circulated all the time. The hot water is supplied to the water outlet pipe PA23, so that the hot water is directly supplied when the user turns on the hot water switch PA231.

However, although the water heater PA2 can supply hot water instantaneously, since the hot water in the water outlet pipe PA23 flows back to the heater body PA21 through the circulation pipe PA24, some heat is still lost, and when the hot water switch PA231 When shutting down, in order to return the hot water in the water outlet pipe PA23, an additional pump is needed to circulate the hot water in the closed pipeline, thereby further wasting energy.

As described above, since the above-mentioned water heater PA2 is a gas-heating type water heater, the circulation pipe PA24 can be used for the return water heating, but in fact, the electric heating type water heater uses high power for instantaneous heating, although high The electric electric water heater of the power can be quickly heated to supply hot water, but also because of the high power, it is easy to generate steam due to overheating during the heating process, and then an explosion occurs.

In view of the prior art, the existing gas-type water heater can heat the water circulation in the pipe through the circulation pipeline, but it will cause waste of energy, and the electric heating water heater can be heated quickly to supply hot water, but it is easy because If the heating power is too large, steam is generated during the heating process, thereby increasing the risk of explosion; thus, the object of the present invention is to provide a preheating piping system and a control method thereof, thereby solving the problem of excessive energy waste and being effective. Supply stable hot water.

In order to achieve the above object, the necessary technical means adopted by the present invention is to provide a preheating piping system and a control method therefor. The preheating piping system is configured to sequentially operate in a water quantity measuring stage, a preheating stage and a hot water supply stage, and is connected to a water heater, the preheating piping system comprising a hot water pipe and a preheating Device. The hot water pipe is connected to the water heater, and is pre-filled with working water before the water quantity measuring stage. The preheating device comprises a water storage tank, a heater, an output component and a control module.

The water storage tank is connected to the hot water pipe, and the working water is pre-filled before the water quantity measuring stage, and the amount of water filled in the water storage tank is an immediate water capacity of the water storage tank. A heater is disposed in the water storage tank for heating the working water in the water storage tank during the preheating phase, and the heater has a heating power. The output assembly is in communication with the water heater and the water storage tank to output the working water during the water quantity measurement phase and the hot water supply stage.

The control module is configured for the user to set a preset water temperature, and includes a flow detector, an outlet water temperature detector, an in-tank water temperature detector, and a processing unit.

The flow detector is disposed in the hot water pipe for measuring the working water flow in one of the working waters in the hot water pipe during the water quantity measuring phase.

The outlet water temperature detector is disposed at the output component for detecting the outlet water temperature and a hot water supply in a measurement phase of the working water flowing out of the output component during the water quantity measurement phase and the hot water supply phase respectively Stage water temperature.

The in-tank water temperature detector is disposed in the water storage tank for detecting the water temperature in the preheating stage of the working water in the water storage tank and the hot water supply stage respectively The water temperature in the tank during the hot water supply phase.

The processing unit is electrically connected to the flow detector, the water outlet temperature detector, the in-tank water temperature detector, and the heater.

Wherein, the processing unit calculates, according to the beginning of the water quantity measurement phase, one of the working water flow time experienced by one of the water temperature in the water quantity measurement stage being greater than a preset temperature change amount, thereby determining the working water flow time according to the working water flow time Calculating the water content of one pipe in the hot water pipe with the working water flow meter in the pipe; the processing unit further calculating the hot water pipe according to the water content of the pipe, the preset water discharge temperature and the water temperature thermometer of the measuring stage in the preheating stage One of the demanding heat, and controlling the heater to preheat the working water in the water storage tank according to the required heat; the processing unit further controls the output component according to the water supply temperature of the hot water supply stage during the hot water supply stage The output ratio of the working water preheated in the water storage tank to the working water in the hot water pipe is such that the water outlet temperature of the hot water supply stage approaches the preset outlet water temperature.

The preheating pipeline system further includes a water level detector disposed in the water storage tank and electrically connected to the control module for detecting the auxiliary technology. The water level of the working water generates a water level height value, so that the processing unit calculates the instantaneous water capacity of the water storage tank according to the water level height value and the maximum water capacity of the water storage tank of the water storage tank.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the output component further comprises a mixing valve, a water storage pipe outlet pipe and a hot water outlet pipe. The mixing valve is connected to the hot water pipe; the water storage outlet pipe is connected to the mixing valve and the water storage tank; the hot water outlet pipe is connected to the mixing valve for outputting the working water mixed by the mixing valve.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the hot water pipe further comprises a water storage tank connecting section, and the flow detecting device and the water inlet temperature detecting device are disposed in the water storage tank connecting section.

Another necessary technical means adopted by the present invention is to provide a control method for a preheating piping system, which is applied to the preheating piping system as described above, and the control method comprises the following steps: First, the step (a) is in the amount of water In the measuring phase, the flow detector is used to measure the working water flow of the working water in the hot water pipe, and the working water flow time is calculated by the processing unit to calculate the working water flow in the pipe. Calculating the water content of the pipe with the working water flow time; then, in step (b), calculating the hot water pipe according to the water content of the pipe, the preset water temperature, and the water temperature thermometer of the measuring stage Requiring heat, and controlling the heater to preheat the working water in the water storage tank according to the required heat; then, in step (c), controlling the output according to the outlet water temperature of the hot water supply stage in the hot water supply stage The assembly adjusts an output ratio of the working water preheated in the water storage tank to the working water in the hot water pipe, so that the water outlet temperature of the hot water supply stage approaches the preset water discharge temperature.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the step (a) further comprises the following steps: the step (a1) is to open the output component, and the working water in the hot water pipe flows to the flow detector, and further Causing the flow detector to start recording the flow of the working water through the hot water pipe, and the processing unit starts timing; step (a2) is when the water outlet temperature detector detects the working water passing through the output component When the outlet water temperature in the measurement stage is greater than a preset temperature value, the flow detector stops recording and generates the working water flow in the tube, and the processing unit stops timing and generates the working water flow time; step (a3) is a processing unit. The amount of water in the tube is calculated according to the working water flow rate in the pipe and the working water flow time.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the step (b) further comprises the following steps: the step (b1) is to calculate the hot water pipe according to the water content of the pipe, the preset water temperature and the water temperature thermometer of the measuring stage. The required heating amount; the step (b2) is to calculate a target heating temperature according to the water capacity of the water tank, the water content of the pipe, the preset water temperature, the water temperature of the measuring stage and the water temperature of the water tank; the step (b3) is A heating time is calculated based on the required heat and the heating power.

In an auxiliary technical means derived from the above-mentioned necessary technical means, the step (c) further comprises the following steps: the step (c1) is to open the output component; the step (c2) is that the processing unit controls the water temperature according to the hot water supply phase. The output assembly adjusts an output ratio of the pre-heated working water in the water storage tank to the working water in the hot water pipe.

As described above, the preheating piping system and the control method thereof according to the present invention preheat the working water in the water storage tank according to the water capacity of the hot water pipe in the hot water pipe, so that the working water in the hot water pipe can be preheated. The working water is mixed, and the working water reaching the preset outlet temperature is directly output, which effectively saves energy and water resources, and can accurately output stable hot water.

PA1‧‧‧ water heater

PA11‧‧‧Water heater body

PA12‧‧‧ water inlet pipe

PA121‧‧‧ cold water switch

PA13‧‧‧Water outlet

PA131‧‧‧ hot water switch

PA2‧‧‧ water heater

PA21‧‧‧Water heater body

PA22‧‧‧ water inlet pipe

PA221‧‧‧ cold water switch

PA23‧‧‧Water supply pipeline

PA231‧‧‧ hot water switch

PA24‧‧‧Circulation line

100‧‧‧Preheating piping system

1‧‧‧ hot water pipe

11‧‧‧Sink connection section

2‧‧‧Preheating device

21‧‧‧Water storage tank

22‧‧‧heater

23‧‧‧Output components

231‧‧‧Mixed valve

232‧‧‧Water storage pipe

233‧‧‧ hot water outlet pipe

24‧‧‧Control Module

241‧‧‧Flow detector

242‧‧‧Inlet water temperature detector

243‧‧‧Water temperature detector

244‧‧‧In-tank water temperature detector

245‧‧‧Water level detector

246‧‧‧Processing unit

247‧‧‧Operator interface

200‧‧‧ water heater

S1‧‧‧ first signal

S2‧‧‧ second signal

S3‧‧‧ third signal

S4‧‧‧fourth signal

S5‧‧‧ fifth signal

S6‧‧‧6th signal

The first figure shows a schematic plan view of a prior art water heater structure; the second figure shows a schematic plan view of a prior art water heater structure installation circulation line; and the third figure shows a preheating tube provided by a preferred embodiment of the present invention; A schematic diagram of a system of a road system; a fourth diagram showing a circuit diagram of a control module of a preheating piping system provided by a preferred embodiment of the present invention; and a fifth drawing showing a preheating tube provided by a preferred embodiment of the present invention The flow chart of the control method of the road system; the sixth figure is a detailed step flow chart of the step S1 of the fifth figure; the seventh figure is the detailed step flow chart of the step S2 of the fifth figure; and the eighth figure is the step of the fifth figure Detailed step flow chart of S3.

Specific embodiments of the present invention will be described in more detail below with reference to the drawings. Advantages and features of the present invention will be apparent from the description and appended claims. It should be noted that the drawings are all in a very simplified form and both use non-precise proportions, and are only for convenience and clarity to assist the purpose of the embodiments of the present invention.

Please refer to the third drawing, which is a schematic diagram showing the system of the preheating piping system provided by the preferred embodiment of the present invention. As shown, a preheating line system 100 includes a hot water pipe 1 and a preheating device 2. The preheating piping system 100 is configured to operate in a water quantity measuring stage, a preheating stage and a hot water supply stage in sequence.

The hot water pipe 1 is connected to a water heater 200, and is pre-filled with working water before the water quantity measuring stage, wherein the hot water pipe 1 has a water storage tank connecting section 11. The preheating device 2 includes a water storage tank 21, a heater 22, an output assembly 23, and a control module 24.

The water storage tank 21 is connected to the hot water pipe 1, and is filled with working water before the water quantity measuring stage, and the amount of working water filled in the water storage tank 21 is an immediate water capacity of the water storage tank.

The heater 22 is disposed in the water storage tank 21 for heating the working water in the water storage tank 21 during the preheating phase, and the heater 22 has a heating power.

The output assembly 23 includes a mixing valve 231, a sump outlet line 232, and a hot water outlet line 233. A mixing valve 231, a water storage outlet pipe 232, and a hot water outlet pipe 233.

The mixing valve 231 is in communication with the hot water pipe 1 to receive the working water delivered from the water heater 200 through the hot water pipe 1. The water storage tank outlet pipe 232 is connected to the mixing valve 231 and the water storage tank 21 for conveying the working water in the water storage tank 21 to the mixing valve 231, so that the working water in the hot water pipe 1 and the water storage tank 21 are transmitted through the mixing valve 231. The working water inside is mixed output. The hot water outlet pipe 233 is connected to the mixing valve 231 for outputting the mixed working water of the mixing valve 231.

Please refer to the fourth figure, which is a circuit diagram showing the control module of the preheating pipeline system provided by the preferred embodiment of the present invention. As shown, the control module 24 includes a flow detector 241, a water inlet temperature detector 242, an outlet water temperature detector 243, an in-slot water temperature detector 244, a water level detector 245, and A processing unit 246.

The flow detector 241 is disposed in the water storage tank connecting section 11 of the hot water pipe 1 for measuring the working water flow in one of the working water in the hot water pipe 1 in the water quantity measuring stage, and transmitting a loaded pipe The first signal S1 of the internal working water flow. The water inlet temperature detector 242 is disposed at the water tank connection section 11 of the hot water pipe 1 for detecting the temperature of the working water flowing from the hot water pipe 1 into the water storage tank 21, and transmitting a temperature of the working water. Signal S2.

The outlet water temperature detector 243 is disposed in the hot water outlet pipe 233 of the output unit 23 for detecting the temperature of the working water flowing out from the hot water outlet pipe 233 after being mixed by the mixing valve 231, thereby respectively respectively The measuring stage and the hot water supply stage detect the outflow water temperature of one of the working water flowing out of the hot water outlet pipe 233 of the output component 23 and the outlet water temperature of a hot water supply stage, and transmit a water with a measuring stage The third signal S3 of the temperature of the water or the hot water supply stage.

The in-tank water temperature detector 244 is disposed in the water storage tank 21 for detecting the water temperature and the hot water in the preheating stage of the working water in the water storage tank 21 in the preheating stage and the hot water supply stage, respectively. The water temperature in the tank is supplied and the fourth signal S4 of the water temperature in the tank in the preheating stage or the water temperature in the tank in the hot water supply stage is transmitted.

The water level detector 245 is disposed in the water storage tank 21 for detecting the water level of the water storage tank 21 and transmitting a fifth signal S5 carrying the water level.

The processing unit 246 is electrically connected to the flow detector 241, the water inlet temperature detector 242, the water outlet temperature detector 243, the in-tank water temperature detector 244, the water level detector 245, and the heater 22. In addition, in practice, the processing unit 246 further includes an over-temperature protection mechanism for turning off the power of the heater 22 when the water temperature detector 244 detects that the water temperature in the water storage tank 21 is too high. In more detail, when the in-tank water temperature detector 244 detects the water temperature in the preheating stage of the water storage tank 21 in the preheating stage or the water supply stage in the hot water supply stage of the hot water supply stage When the temperature of the water in the temperature is too high, the processing unit 246 cuts off the power supplied to the heater 22.

As described above, the processing unit 246 calculates a working water flow time experienced by one of the water temperature measurement stages when the water volume measurement phase is greater than a preset temperature change amount, based on the working water flow time and The working water flow meter in the pipe calculates the amount of water in one of the hot water pipes 1; and the processing unit 246 calculates the heat demand of one of the hot water pipes 1 according to the water content of the pipe, the preset water temperature, and the measuring stage water temperature thermometer in the preheating stage. And sending a heater 22 carrying the sixth signal S6 of the required heat to control the heater 22 to preheat the working water in the water storage tank 21 according to the required heat; moreover, the processing unit 246 is further in the hot water supply stage. The mixing valve 231 of the hot water supply stage outlet water temperature control output unit 23 adjusts the output ratio of the preheated working water in the water storage tank 21 to the working water in the hot water pipe 1, so that the water supply temperature in the hot water supply stage approaches the preset. Outlet temperature.

The operation interface 247 is electrically connected to the processing unit 246 for the user to set a preset water temperature, and is used to display a water storage tank temperature, a water storage capacity, a warm-up time, a water content, and a tank. The internal water target temperature and the preset water temperature. Wherein, in the water quantity measurement stage, a preheating stage and a hot water supply stage

Please refer to the fifth figure, which is a flow chart showing the control method of the preheating piping system provided by the preferred embodiment of the present invention. As shown in the figure, the control method of the preheating pipeline system 100 includes the following steps: First, in step S1, in the water volume measurement phase, the flow detector 241 is used to measure the working water in the tube in the hot water pipe 1. The water flow rate is calculated by the processing unit 246 to calculate the water content of the pipe according to the working water flow rate in the pipe and the working water flow time. In practical practice, the calculation method of the water content of the pipe is as follows: pipe content water quantity: Q _p

Working water flow time: △t

Working water flow in the tube: ω

Q _p =k*ω*△t

Next, in step S2, in the preheating stage, the required heat of the hot water pipe 1 is calculated according to the water content of the pipe, the preset water temperature and the water quality thermometer of the measuring stage, and the heater 22 controls the working water in the water storage tank 21 according to the required heat. Preheat. In practice, the calculation of the heat demand of the hot water pipe 1 is as follows: Demand heat: P _nd

Working water heat capacity: C

Preset water temperature: T _dir

Measurement water temperature: T _out

P _nd =Q _p *C*(T _dir -T _out )

Finally, in step S3, in the hot water supply phase, according to the hot water supply stage, the outlet water temperature control output assembly 23 adjusts the ratio of the output of the preheated working water in the water storage tank 21 to the working water in the hot water pipe 1, thereby making the hot water The outlet water temperature in the supply stage approaches the preset outlet temperature. In practical practice, the valve opening degree calculation method of the mixing valve 231 is as follows: the hot water pipe inlet opening degree: V _in

Water inlet opening degree: V _out (V _out +V _in =1)

Working water temperature for hot water supply: T _in

Working water temperature for storage tank supply: T _tank

T _dir =T _tank *V _out +T _in *V _in

Please continue to refer to the sixth figure, and the sixth figure is a detailed step flow chart of step S1 of the fifth figure. As shown in the figure, the step S1 further includes the following steps: First, in step S11, the output component 231 is first turned on, so that the working water in the hot water pipe 1 flows to the flow detector 241, so that the flow detector 241 starts recording the working water. The flow through the hot water pipe 1 and the processing unit 246 begins timing.

Next, in step S12, when the outlet water temperature detector 243 detects that the outlet water temperature of the working water passing through the output unit 23 is greater than the preset temperature value, the flow detector 241 stops recording and generates the working water flow in the tube. And processing unit 246 stops timing and generates a working water flow time. In more detail, due to the activation of the output assembly 23, the water heater 200 starts to heat the working water in the hot water pipe 1, so when the heated working water flows to the outlet water temperature detector 243, it means that the original hot water pipe 1 is not The working water heated by the water heater 200 has flowed out.

Finally, step S13 is that the processing unit 246 calculates the tube content water amount according to the working water flow rate in the tube and the working water flow time.

Please continue to refer to the seventh figure, and the seventh figure is a detailed step flow chart of step S2 of the fifth figure. As shown in the figure, the above step S2 further includes the following steps: First, step S21 calculates the required heat of the hot water pipe 1 according to the water content of the pipe, the preset water temperature, and the water quality thermometer of the measurement stage.

Next, in step S22, a target heating temperature is calculated according to the water capacity of the water tank, the water content of the pipe, the preset water temperature, the water temperature of the measuring stage, and the water temperature of the water tank.

Finally, step S23 calculates a heating time based on the required heat and the heating power. The calculation time is calculated by the required heat and the heating power of the heater 22.

Please continue to refer to the eighth figure, and the eighth figure is a detailed step flow chart of step S3 of the fifth figure. As shown in the figure, the above step S3 further includes the following steps: First, step S31 is to turn on the output component 23. More specifically, the mixing valve 231 of the output unit 23 is opened to mix and discharge the working water in the hot water pipe 1 with the working water in the water storage tank 21.

Next, in step S32, the processing unit 246 adjusts the output ratio of the pre-heated working water in the water storage tank 21 and the working water in the hot water pipe 1 according to the hot water supply stage outlet water temperature control output unit 23, that is, according to the hot water supply stage. The temperature is adjusted to adjust the output ratio so that the outlet water temperature in the hot water supply phase approaches the preset outlet temperature.

Compared with the existing water heaters, whether it is gas-type or electric-heat type, energy is wasted or increased risk in order to directly supply hot water; however, the preheating piping system and the preheating piping system of the present invention are controlled. The method preheats the working water in the water storage tank according to the water capacity of the hot water pipe in the hot water pipe, so that the working water in the hot water pipe can be mixed with the preheated working water, and directly outputs the working water reaching the preset water temperature. Effectively save energy and water resources, and accurately output stable hot water.

The above is only a preferred embodiment of the invention and is not intended to limit the invention. Any changes in the technical means and technical contents disclosed in the present invention may be made by those skilled in the art without departing from the technical means of the present invention. The content is still within the scope of protection of the present invention.

Claims (8)

 A preheating pipeline system is configured to sequentially operate in a water quantity measurement stage, a preheating stage and a hot water supply stage, and is connected to a water heater, the preheating pipeline system comprising: a hot water pipe, Connected to the water heater, and pre-filled with a working water before the water quantity measuring stage; and a preheating device comprising: a water storage tank connected to the hot water pipe, pre-filled before the water quantity measuring stage Working water, and the amount of water filled in the water storage tank is an immediate water capacity of the water storage tank; a heater is disposed in the water storage tank for the work in the water storage tank during the preheating stage Water heating, and the heater has a heating power; an output component is connected to the water heater and the water storage tank to output the working water in the water quantity measuring stage and the hot water supply stage; and a control module For the user to set a preset water temperature, the control module includes: a flow detector disposed in the hot water pipe for measuring the working water in the hot water pipe during the water quantity measuring phase tube Working water flow; an outlet water temperature detector is disposed in the output component for respectively detecting water in a measuring stage of the working water flowing out of the output component during the water quantity measuring phase and the hot water supply stage a temperature and a water supply temperature of the hot water supply stage; a water temperature detector in the tank is disposed in the water storage tank for detecting the inside of the water storage tank during the preheating stage and the hot water supply stage a water temperature in the preheating stage of the working water and a water temperature in the tank in the hot water supply stage; and a processing unit electrically connected to the flow detector, the water temperature detector, and the water temperature in the tank a detector and the heater; wherein the processing unit calculates a working water flow time experienced by a rate of change of one of the water temperature in the water quantity measuring stage from a start of the water quantity measuring stage And calculating a water content of the tube in the hot water pipe according to the working water flow time and the working water flow meter in the tube; the processing unit is further in the preheating stage according to the water content of the tube, the preset water temperature The measuring stage discharge water thermometer calculates a required heat of the hot water pipe, and controls the heater to preheat the working water in the water storage tank according to the required heat; the processing unit further relies on the heat in the hot water supply stage Water supply stage outlet water temperature control The output assembly adjusts the ratio of the pre-heated working water in the water storage tank to the working water in the hot water pipe, so that the hot water supply stage outlet water temperature approaches the preset water output temperature.    The preheating piping system of claim 1, further comprising a water level detector disposed in the water storage tank and electrically connected to the control module for detecting the working water The water level generates a water level height value, so that the processing unit calculates the immediate water capacity of the water storage tank according to the water level height value and the maximum water capacity of the water storage tank of the water storage tank.    The preheating piping system of claim 1, wherein the output assembly further comprises: a mixing valve connected to the hot water pipe; a water storage pipe outlet pipe connected to the mixing valve and the a water storage tank; and a hot water outlet pipe. The utility model is connected to the mixing valve for outputting the working water mixed by the mixing valve.    The preheating piping system of claim 1, wherein the hot water pipe further comprises a water storage tank connecting section, and the water flow detecting device and the water inlet temperature detecting device are disposed at the water storage tank connecting section.    A method for controlling a preheating piping system is applied to a preheating piping system as described in claim 1, wherein the control method comprises the following steps: (a) utilizing the flow during the water quantity measuring phase The detector measures the working water flow of the working water in the hot water pipe, and uses the processing unit to calculate the working water flow time, according to the working water flow in the pipe and the working water flowing time (b) in the preheating stage, calculating the required heat of the hot water pipe according to the water content of the pipe, the preset water temperature and the water temperature thermometer of the measuring stage, and controlling the heater according to the Requiring heat to preheat the working water in the water storage tank; and (c) controlling the output assembly to adjust the preheating operation in the water storage tank according to the outlet water temperature of the hot water supply stage during the hot water supply phase The ratio of the output of the water to the working water in the hot water pipe is such that the outlet water temperature of the hot water supply stage approaches the preset outlet temperature.    The method for controlling a preheating piping system according to claim 5, wherein the step (a) further comprises the step of: (a1) opening the output assembly to cause the working water in the hot water pipe to flow to the flow a detector, wherein the traffic detector starts to record the flow of the working water through the hot water pipe, and the processing unit starts timing; (a2) when the water temperature detector detects the work through the output component When the water outlet temperature of the water is greater than a preset temperature value, the flow detector stops recording and generates the working water flow in the tube, and the processing unit stops timing and generates the working water flow time; and (a3) The processing unit calculates the amount of water in the tube according to the working water flow rate in the tube and the working water flowing time.    The method for controlling a preheating piping system according to claim 5, wherein the step (b) further comprises the following steps: (b1) according to the water content of the pipe, the preset water temperature, and the water output of the measuring stage. The thermometer calculates the required heat of the hot water pipe; (b2) calculating a target heating temperature according to the water capacity of the water tank, the water content of the pipe, the preset water temperature, the water temperature of the measuring stage, and the water temperature of the water tank; B3) Calculating a heating time based on the required heat and the heating power.    The method for controlling a preheating piping system according to claim 5, wherein the step (c) further comprises the steps of: (c1) opening the output component; and (c2) processing the heating unit according to the hot water supply Stage Outlet Temperature Control The output assembly regulates the ratio of the pre-heated working water in the water reservoir to the working water in the hot water pipe.