A centralized hot water intelligent return system

Abstract

The application discloses a centralized hot water intelligent return water system, which is characterized in that: a water outlet temperature meter for detecting the water outlet temperature is arranged in a water outlet channel between a hot water tank and a hot water pipe network; a pump for adjusting the return water quantity is arranged in a return water channel between the hot water pipe network and the hot water tank; and a return water temperature meter for detecting the return water temperature and a flow meter for detecting the return water quantity are arranged respectively behind the water outlet of the pump; the problems of large hot water temperature fluctuation, poor return water in some areas and the like caused by the start and stop of the return water pump according to the fixed return water pipe temperature are solved, the problem of the use comfort is affected, the best temperature used at the end is automatically calculated according to the weather change, the uniformity of the hot water temperature is ensured, and the use comfort is improved.

Description

TECHNICAL FIELD

[0001] The application is a centralized hot water intelligent backwater system, belonging to the technical field of centralized hot water system backwater control. BACKGROUND

[0002] In order to ensure the hot water temperature in the pipe network, the hot water pipe network needs to be circulated. The current backwater control methods mainly include the following two kinds: 1. backwater pipe water temperature detection backwater: when the backwater pipe water temperature is detected to be lower than the set temperature, the backwater pump / backwater valve is opened to force backwater; 2. constant flow backwater: the backwater pump / backwater valve is always open, and the backwater is constant.

[0003] The above two kinds of backwater control have the following industry difficulties: 1. backwater pipe water temperature detection backwater will cause large fluctuations in the hot water temperature in the pipe network, resulting in hot and cold hot water, affecting the comfort of hot water use, and the frequent start and stop of the backwater pump / backwater valve will produce water hammer phenomenon, producing noise and affecting the service life of the pipe and equipment. 2. The constant flow backwater always circulates the pipe network, and cannot backwater according to the actual heat loss change of the pipe network, resulting in waste of heat and electric energy. SUMMARY

[0004] In view of the deficiencies of the prior art, the application aims to provide a centralized hot water intelligent backwater system to solve the problem.

[0005] In order to achieve the above-mentioned purpose, the application is realized by the following technical scheme: a centralized hot water intelligent backwater system, which comprises a hot water tank for providing hot water, an outlet channel for conveying hot water, and a backwater channel for backwater; the hot water tank is circulated by backflowing from the outlet channel to the hot water tank through the backwater channel after the hot water tank to the hot water pipe network; an outlet thermometer for detecting the outlet temperature is arranged in the outlet channel between the hot water tank and the hot water pipe network; a pump for adjusting the backwater amount is arranged in the backwater channel between the hot water pipe network and the hot water tank; and a backwater thermometer for detecting the backwater temperature and a flowmeter for detecting the backwater amount are arranged respectively at the outlet of the pump; the outlet thermometer, backwater thermometer and flowmeter are all controlled by a processing unit as information collection devices; the processing unit processes the information of the devices to adjust the outlet amount of the pump.

[0006] Preferably, an external temperature and humidity detection module is arranged outdoors, which feeds back the detection information to the processing unit.

[0007] Preferably, the detection module is a temperature and humidity sensor distributed around the hot water pipe network, and the processing unit receives temperature and humidity information from the temperature and humidity sensor.

[0008] Preferably, the detection module is an internet cloud, and the processing unit receives local temperature and humidity information.

[0009] Preferably, an electric valve for regulating the water flow is provided in the water outlet channel between the hot water tank and the hot water pipe network, and the electric valve is controlled by the processing unit.

[0010] Preferably, the return water channel has multiple diversion channels, each of which is connected to a set of pumps, and the diversion channels will re-converge after passing through the pumps to supply the return water thermometer and flow meter for detection.

[0011] A control method for a centralized intelligent hot water return system, based on such a system, includes the following steps:

[0012] Step 1: The hot water tank operates and supplies hot water. The processing unit starts to detect the supply water temperature through the outlet water thermometer and detects the external temperature and humidity through the detection module.

[0013] Step 2: The processing unit calculates the optimal return water temperature based on the water supply temperature information and ambient temperature and humidity information provided in Step 1, according to a predetermined algorithm.

[0014] Step 3: Calculate the heat dissipation of the hot water circulation under the current return water temperature conditions;

[0015] Step 4: Calculate the amount of hot water return required to meet the heat dissipation of the hot water circulation in Step 3 under the current conditions;

[0016] Step 5; Based on the hot water return volume calculated in Step 4;

[0017] Step 6: Compare the current return water temperature with the optimal return water temperature calculated in Step 2;

[0018] Step 7: The processing unit adjusts the pump's output power based on the values ​​from Step 6.

[0019] Step 8: If the return water temperature deviation is within the range, the return water pump will continue to operate.

[0020] Preferably, the return water temperature is divided into different ranges according to the ambient temperature to determine the current optimal return water temperature.

[0021] Beneficial effects

[0022] This invention solves the problems of large hot water temperature fluctuations and poor return water flow in some areas caused by starting and stopping the return water pump based on a fixed return water pipe temperature, thus affecting user comfort. It automatically calculates the optimal temperature for end-user use based on weather changes, ensuring uniform hot water temperature and improving user comfort. It avoids the noise problems and high pump failure rate caused by water hammer due to frequent start-stop of the return water pump, extending the equipment's lifespan. It automatically adjusts the return water temperature and return water volume according to weather changes and the heat dissipation of hot water, avoiding the energy waste caused by constantly running the return water pump. Attached Figure Description

[0023] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the structure of a centralized hot water intelligent return system according to Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a centralized hot water intelligent return system according to Embodiment 2 of the present invention;

[0026] Figure 3 This is a schematic diagram of the control method for a centralized intelligent hot water return system according to the present invention. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0028] Example 1

[0029] This embodiment provides a method such as Figure 1 The centralized hot water intelligent return system shown includes a hot water tank 1 for providing hot water, an outlet channel A for conveying hot water, and a return channel B for returning water; the hot water tank 1 is connected to the hot water pipe network 4 through the outlet channel A and then returns to the hot water tank 1 through the return channel B to form a circulation.

[0030] A water outlet thermometer 3 is installed in the water outlet channel A between the hot water tank 1 and the hot water pipe network 4 to detect the water outlet temperature. The water outlet temperature can be determined by the water outlet thermometer 3.

[0031] A pump 5 is installed in the return water channel B between the hot water pipe network 4 and the hot water tank 1 to adjust the return water volume. The pump 5 stabilizes the temperature change in the hot water pipe network 4 by regulating the return water volume.

[0032] A return water thermometer 6 for detecting the return water temperature and a flow meter 7 for detecting the return water flow are installed after the outlet of the pump 5, so that the temperature and flow rate of the return water can be known.

[0033] An outdoor temperature and humidity detection module is installed. The detection module consists of temperature and humidity sensors 9 distributed around the hot water pipe network 4, so that the current ambient temperature and humidity information can be obtained.

[0034] An electric valve 2 for regulating the water output is installed in the water outlet channel A between the hot water tank 1 and the hot water pipe network 4. The hot water output can be regulated by the electric valve 2, so as to cooperate with the pump 5 to further stabilize the temperature change in the hot water pipe network 4.

[0035] The return water channel B has multiple diversion channels, each of which is connected to a set of pumps 5. After passing through the pumps 5, the diversion channels will re-converge to supply the return water thermometer 6 and flow meter 7 for detection. After diversion, each set of pumps 5 can work independently or together, making the return water volume change conditions more detailed, and further stabilizing the temperature change in the hot water pipe network 4.

[0036] The outlet water thermometer 3, return water thermometer 6, return water flow meter 7, and temperature and humidity sensor all feed back the detected information to the processing unit 8, while the electric valve 2 and pump 5 are controlled by the processing unit 8.

[0037] Example 2

[0038] like Figure 2 The detection module is located in the Internet cloud 10, such as the temperature and humidity data released by the meteorological bureau for multiple time periods. The processing unit 8 can adjust the temperature and humidity in advance according to the forecast of the meteorological bureau, so that the temperature fluctuation is smaller.

[0039] like Figure 3 A control method for a centralized intelligent hot water return system includes the following steps:

[0040] Step 1: The hot water tank 1 operates and supplies hot water. The controller starts to detect the water supply temperature through the outlet thermometer 3 and detects the external temperature and humidity through the detection module.

[0041] Step 2: The controller calculates the optimal return water temperature based on the supply water temperature information and ambient temperature and humidity information provided in Step 1, according to a predetermined algorithm. This algorithm divides the return water temperature into different ranges based on the ambient temperature to determine the optimal return water temperature. For example, if the ambient temperature is below 15℃, the return water temperature should not be lower than 45℃; if the ambient temperature is between 15-25℃, the return water temperature should not be lower than 42℃; if the ambient temperature is above 25℃, the hot water return water temperature should not be lower than 40℃.

[0042] Step 3: Calculate the heat dissipation of hot water circulation under the current return water temperature conditions. This heat dissipation is calculated based on the heat transfer coefficients of the outlet channel A and return channel B, including the material, insulation material, and thickness. The heat loss is calculated based on the heat transfer coefficients, supply water temperature, ambient temperature, pipe length, and the calculated return water temperature. A general formula is Q = (k × A × ΔT) / L (where Q represents the heat dissipation of hot water circulation; k represents the thermal conductivity of the pipe; A represents the cross-sectional area of ​​the pipe; ΔT represents the temperature difference between the supply water temperature and the ambient temperature; and L represents the length of the pipe).

[0043] Step 4: Calculate the amount of hot water return required to meet the heat dissipation of the hot water circulation in Step 3 under the current conditions; the amount of hot water return can be roughly calculated as follows: heat dissipation / (supply enthalpy - preset return enthalpy) = hot water return.

[0044] Step 5: Based on the hot water return volume calculated in Step 4, the processing unit 8 outputs the operating frequency command of the pump 5 to adjust the circulating water volume of the pump 5.

[0045] Step 6: Compare the current return water temperature with the optimal return water temperature calculated in Step 2;

[0046] Step 7: The controller adjusts the output power of pump 5 according to the values ​​in step 6;

[0047] Step 8: If the return water temperature deviation is within the range, keep pump 5 running.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. 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 can be understood by those skilled in the art.

Claims

1. A centralized intelligent hot water return system, comprising a hot water tank for providing hot water, an outlet channel for conveying hot water, and a return channel for returning hot water; wherein the hot water flows from the outlet channel to the hot water pipe network and then returns to the hot water tank through the return channel to form a circulation; characterized in that: A thermometer for detecting the outlet water temperature is installed in the outlet water channel between the hot water tank and the hot water pipe network; a pump for adjusting the return water volume is installed in the return water channel between the hot water pipe network and the hot water tank; and a return water thermometer for detecting the return water temperature and a flow meter for detecting the return water volume are installed after the outlet of the pump. The outlet water thermometer, return water thermometer, and flow meter will all be controlled by a processing unit as electrical devices for collecting information. The processing unit collects and processes information from electrical components, thereby adjusting the pump's output water volume. The centralized intelligent hot water return system includes the following control methods: Step 1: The hot water tank operates and supplies hot water. The processing unit starts to detect the supply water temperature through the outlet water thermometer and detects the external temperature and humidity through the detection module. Step 2: The controller calculates the current optimal return water temperature based on the water supply temperature information and ambient temperature and humidity information provided in Step 1 according to a predetermined algorithm. This algorithm divides the return water temperature into different ranges according to the ambient temperature to determine the current optimal return water temperature. Step 3: Calculate the heat dissipation of hot water circulation under the current return water temperature conditions. This heat dissipation is calculated based on the heat transfer coefficients of the outlet channel A and return channel B, the insulation material, and the thickness. The heat loss is calculated based on the heat transfer coefficients, supply water temperature, ambient temperature, pipe length, and the calculated return water temperature. The calculation formula is Q=(k×A×ΔT) / L, where Q represents the heat dissipation of hot water circulation; k represents the thermal conductivity of the pipe; A represents the cross-sectional area of ​​the pipe; ΔT represents the temperature difference between the supply water temperature and the ambient temperature; and L represents the length of the pipe. Step 4; Calculate the amount of hot water return required to meet the heat dissipation of the hot water circulation in Step 3 under the current conditions; the amount of hot water return is calculated as follows: heat dissipation / (supply enthalpy - preset return enthalpy) = hot water return. Step 5; Based on the hot water return volume calculated in Step 4; Step 6: Compare the current return water temperature with the optimal return water temperature calculated in Step 2; Step 7: The processing unit adjusts the pump's output power based on the values ​​from Step 6. Step 8; If the return water temperature deviation is within the range, the return water pump will continue to operate. The return water temperature is divided into different ranges according to the ambient temperature to determine the current optimal return water temperature.

2. The centralized intelligent hot water return system according to claim 1, characterized in that: An outdoor temperature and humidity detection module is installed, which feeds the detection information back to the processing unit.

3. A centralized intelligent hot water return system according to claim 2, characterized in that: The detection module consists of temperature and humidity sensors distributed around the hot water pipe network, and its processing unit receives temperature and humidity information from the temperature and humidity sensors.

4. A centralized intelligent hot water return system according to claim 2, characterized in that: The detection module is located in the cloud, and its processing unit receives local temperature and humidity information.

5. A centralized intelligent hot water return system according to claim 1, characterized in that: An electric valve for regulating the water flow is installed in the water outlet channel between the hot water tank and the hot water pipe network. This electric valve is controlled by the processing unit.

6. A centralized intelligent hot water return system according to claim 1, characterized in that: The return water channel has multiple diversion channels, each of which is connected to a set of pumps. After passing through the pumps, the diversion channels will re-converge to supply the return water thermometer and flow meter for detection.

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