Intelligent energy-saving hot water supply device

Abstract

The utility model relates to the technical field of energy supply, in particular to an intelligent energy-saving hot water supply device. Comprising a preheating heat preservation water tank, a constant-temperature heat preservation water tank, a preheating heat pump, a constant-temperature heat pump, a preheating circulating pump, a constant-temperature circulating pump, a water supply pump, a temperature difference pump, a cold water electromagnetic valve, a water return electromagnetic valve, a water supply pump, a temperature sensor T1, a temperature sensor T2, a temperature sensor T3, a pressure sensor P, a PLC, an edge gateway and a mobile phone APP. According to the intelligent energy-saving hot water supply device, the preheating heat preservation water tank is matched with the preheating heat pump and the preheating circulating pump, the constant-temperature heat preservation water tank is matched with the constant-temperature heat pump and the constant-temperature circulating pump, low-temperature water is heated, the constant temperature of a water supply pipe network is maintained, work division is clear, and the hot water heating and supplying efficiency is improved; and the temperature difference pump is linked with the water feeding pump, high-temperature water in the constant-temperature heat preservation water tank is conveyed to the preheated heat preservation water tank to heat low-temperature water, reasonable utilization of energy is achieved, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This application relates to the field of energy supply technology, specifically to an intelligent energy-saving hot water supply device. Background Technology

[0002] As people's living standards improve and the demand for hot water supply in various places increases, traditional hot water supply equipment has gradually revealed many drawbacks. Many conventional hot water systems typically use a single water tank for heating, making it difficult to simultaneously balance heating efficiency and energy consumption. This method not only heats slowly, failing to meet the immediate demand for large amounts of hot water during peak periods, but also results in significant energy waste during continuous heating, leading to high operating costs.

[0003] An existing patent (publication number: CN115264962B) discloses a temperature difference sensing-based intelligent temperature control solar water heater regulating device, including solar collector tubes, a pipe rack, and a water tank. The solar collector tubes are installed on the pipe rack, and a sealing structure exists between the water tank and the solar collector tubes. An angle converter is located at the bottom of the pipe rack, and a pair of relatively inclined protective plates are located at the upper part of the water tank. A pull-down plate is provided at the bottom of the protective plates, and both the protective plates and the pull-down plate are made of transparent tempered glass. The beneficial effects of this invention are: 1. The water heater based on this invention has an energy storage device, which can convert solar energy into electrical energy through solar panels and store it in a battery; 2. The system itself can heat water on cloudy days, and the water heater based on this invention can use the electrical energy in the battery to heat water.

[0004] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: Although the device combines solar and electrical energy, the system still mainly relies on a single heat source. Under extreme weather conditions, the battery's electrical energy may not be sufficient to meet the hot water demand. The device's temperature control mainly relies on temperature difference sensing, lacking multi-level temperature regulation and intelligent feedback mechanisms, which may lead to large water temperature fluctuations and a poor user experience. Furthermore, the system does not fully utilize the residual heat in the return water pipe, resulting in energy waste. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides an intelligent energy-saving hot water supply device with advantages such as multi-stage heating, temperature difference energy recovery, and intelligent control, which solves the problems of low energy efficiency and inaccurate temperature control in traditional hot water supply systems.

[0006] To achieve the above objectives, this application provides the following technical solution: an intelligent energy-saving hot water supply device, comprising: a preheated insulated water tank, a constant-temperature insulated water tank, a preheating heat pump, a constant-temperature heat pump, a preheating circulating pump, a constant-temperature circulating pump, a water delivery pump, a differential temperature pump, a cold water solenoid valve, a return water solenoid valve, a water supply pump, a temperature sensor T1, a temperature sensor T2, a temperature sensor T3, a pressure sensor P, a PLC controller, an edge gateway, and a mobile APP;

[0007] The preheated insulated water tank is connected to a cold water solenoid valve via a preheating heat pump and a preheating circulation pump to heat low-temperature water. The constant-temperature insulated water tank is connected to a water delivery pump via a constant-temperature heat pump and a constant-temperature circulation pump to maintain a constant temperature in the water supply network. The differential temperature pump is linked with the water delivery pump to deliver high-temperature water from the constant-temperature insulated water tank to the preheated insulated water tank to heat its low-temperature water. The water delivery pump is controlled by a pressure sensor P for variable frequency constant-pressure water supply. The return water solenoid valve is controlled by a temperature sensor T3 to maintain a stable temperature in the return water pipeline. The PLC controller communicates with a mobile APP via an edge gateway to achieve remote intelligent control.

[0008] Through the above scheme, the preheating and heat preservation water tank and the constant temperature heat preservation water tank are connected in series by a water pump to form a two-stage temperature control water circuit system, which effectively recovers the heat in the preheating stage and improves the overall energy utilization rate.

[0009] Furthermore, the preheated insulated water tank and the constant-temperature insulated water tank are connected in series by a water pump, and the outlet of the preheated insulated water tank is connected to the inlet of the constant-temperature insulated water tank.

[0010] Through the above scheme, the preheating heat pump and the constant temperature heat pump adopt a graded temperature control strategy. When the preheating water tank does not reach the set temperature, the preheating heat pump is started first, and when the temperature of the constant temperature water tank exceeds the standard, the constant temperature heat pump is started, thus achieving precise energy consumption management.

[0011] Furthermore, the operating modes of the preheating heat pump and the constant temperature heat pump are controlled by temperature sensor T1 and temperature sensor T2 respectively. When the temperature detected by temperature sensor T1 is lower than the set temperature and the temperature detected by temperature sensor T2 is higher than the set temperature, the temperature difference pump starts and links with the water pump.

[0012] Through the above solution, the water level self-control function of the cold water solenoid valve ensures that the system replenishes water as needed, avoids the water tank from running dry or overflowing, and improves the safety of equipment operation.

[0013] Furthermore, the cold water solenoid valve automatically opens and closes according to the water level in the preheated insulated water tank, opening when the water level is lower than the starting water level and closing when the stopping water level is reached.

[0014] Through the above solution, the temperature feedback control of the return water solenoid valve maintains a stable return water temperature in the pipeline network, prevents low-temperature backflow from affecting the supply water temperature, and ensures user comfort.

[0015] Furthermore, the opening and closing of the return water solenoid valve is controlled by temperature sensor T3. It opens when the return water temperature is lower than the set value and closes when the set value is reached.

[0016] Through the above solution, the PLC controller integrates multi-sensor data to achieve global optimized control, and the communication architecture between the edge gateway and the mobile APP supports IoT remote monitoring and has fault early warning and intelligent scheduling functions.

[0017] Furthermore, the PLC controller integrates signals from temperature sensors T1, T2, and T3, as well as pressure sensor P, and uploads the data to a mobile app via an edge gateway to achieve real-time monitoring and remote operation of the system's operating status.

[0018] The above solution employs a combination of technologies such as dual-tank staged heating, heat recovery, and variable frequency constant pressure, achieving a comprehensive energy-saving efficiency of over 30% while meeting the dynamic needs of different water usage scenarios.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0020] This intelligent energy-saving hot water supply device utilizes a preheated insulated water tank paired with a preheating heat pump and a preheating circulation pump, and a constant-temperature insulated water tank paired with a constant-temperature heat pump and a constant-temperature circulation pump. These components respectively heat low-temperature water and maintain a constant temperature in the water supply network. This clear division of labor improves the efficiency of hot water heating and supply. A temperature difference pump, linked to the delivery pump, transports high-temperature water from the constant-temperature insulated water tank to the preheated insulated water tank to heat the low-temperature water, effectively utilizing the temperature difference and achieving rational energy use and energy conservation. The supply pump, controlled by a pressure sensor, enables variable frequency constant-pressure water supply, ensuring stable supply pressure and improving the user experience. The return water solenoid valve, controlled by a temperature sensor, maintains a stable return water pipe temperature, avoiding problems caused by return water temperature fluctuations and further ensuring the stability of the entire hot water supply system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device in the embodiments of this application;

[0022] Figure 2 This is a schematic diagram of a partial structure of the device in an embodiment of this application;

[0023] In the picture:

[0024] 1. Preheated insulated water tank; 2. Constant temperature insulated water tank; 3. Preheating heat pump; 4. Constant temperature heat pump;

[0025] 5. Preheating circulating pump; 6. Constant temperature circulating pump; 7. Water supply pump; 8. Differential temperature pump; 9. Cold water solenoid valve; 10. Return water solenoid valve; 11. Water supply pump; 12. Temperature sensor T1; 13. Temperature sensor T2; 14. Temperature sensor T3; 15. Pressure sensor P; 16. PLC controller; 17. Edge gateway; 18. Mobile APP. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Please see Figure 1 An intelligent energy-saving hot water supply device in this embodiment includes: a preheated insulated water tank 1, a constant temperature insulated water tank 2, a preheating heat pump 3, a constant temperature heat pump 4, a preheating circulation pump 5, a constant temperature circulation pump 6, a water supply pump 7, a temperature difference pump 8, a cold water solenoid valve 9, a return water solenoid valve 10, a water supply pump 11, a temperature sensor T112, a temperature sensor T213, a temperature sensor T314, a pressure sensor P15, a PLC controller 16, an edge gateway 17, and a mobile APP 18.

[0028] Please see Figure 2 The preheated insulated water tank 1 is connected to the cold water solenoid valve 9 via the preheating heat pump 3 and the preheating circulation pump 5 to heat low-temperature water; the constant-temperature insulated water tank 2 is connected to the water supply pump 7 via the constant-temperature heat pump 4 and the constant-temperature circulation pump 6 to maintain the constant temperature of the water supply network; the temperature difference pump 8 is linked with the water supply pump 7 to transport the high-temperature water from the constant-temperature insulated water tank 2 to the preheated insulated water tank 1 to heat its low-temperature water; the water supply pump 11 is controlled by the pressure sensor P15 for variable frequency constant pressure water supply; the return water solenoid valve 10 is controlled by the temperature sensor T314 to maintain the stable temperature of the return water pipeline; the PLC controller 16 communicates with the mobile APP 18 through the edge gateway 17 to realize remote intelligent control.

[0029] The preheated insulated water tank 1 and the constant-temperature insulated water tank 2 are connected in series by a water pump 7, and the outlet of the preheated insulated water tank 1 is connected to the inlet of the constant-temperature insulated water tank 2.

[0030] The operating modes of the preheating heat pump 3 and the constant temperature heat pump 4 are controlled by temperature sensor T112 and temperature sensor T213 respectively. When the temperature detected by temperature sensor T112 is lower than the set temperature and the temperature detected by temperature sensor T213 is higher than the set temperature, the temperature difference pump 8 starts and links with the water pump 7.

[0031] The cold water solenoid valve 9 automatically opens and closes according to the water level in the preheated insulated water tank 1. It opens when the water level is lower than the starting water level and closes when the stopping water level is reached.

[0032] The opening and closing of the return water solenoid valve 10 is controlled by the temperature sensor T314. It opens when the return water temperature is lower than the set value and closes when the set value is reached.

[0033] The PLC controller 16 integrates the signals from temperature sensors T112, T213, T314, and pressure sensor P15, and uploads the data to the mobile APP 18 through the edge gateway 17 to realize real-time monitoring and remote operation of the system's operating status.

[0034] This embodiment presents an intelligent energy-saving hot water supply device. This device utilizes a preheated insulated water tank paired with a preheating heat pump and a preheating circulation pump, and a constant-temperature insulated water tank paired with a constant-temperature heat pump and a constant-temperature circulation pump. These components respectively heat low-temperature water and maintain a constant temperature in the water supply network. This clear division of labor improves the efficiency of hot water heating and supply. A temperature difference pump, linked to the delivery pump, transports high-temperature water from the constant-temperature insulated water tank to the preheated insulated water tank to heat the low-temperature water, effectively utilizing the temperature difference and achieving rational energy utilization and energy saving. The water supply pump, controlled by a pressure sensor, enables variable frequency constant-pressure water supply, ensuring stable water supply pressure and improving the user's water experience. The return water solenoid valve, controlled by a temperature sensor, maintains a stable return water pipe temperature, avoiding problems caused by return water temperature fluctuations and further ensuring the stability of the entire hot water supply system.

[0035] It should be noted that this intelligent energy-saving hot water supply device has multiple and efficient functions. It is equipped with a preheating insulated water tank 1 and a constant-temperature insulated water tank 2. The former can efficiently heat low-temperature water with the help of a preheating heat pump 3 and a preheating circulation pump 5; the latter relies on a constant-temperature heat pump 4 and a constant-temperature circulation pump 6 to maintain the constant temperature of the water supply network. The temperature difference pump 8 and the water supply pump 7 in the device are linked, cleverly using the high-temperature water in the constant-temperature insulated water tank 2 to heat the low-temperature water in the preheating insulated water tank 1, realizing the rational use of energy. The water supply pump 11 is controlled by a pressure sensor P15 and can achieve variable frequency constant temperature operation. The system provides pressurized water supply to ensure stable water pressure for users. The return water solenoid valve 10, controlled by temperature sensor T314, maintains a stable temperature in the return water pipeline, ensuring stable overall system operation. The cold water solenoid valve 9 automatically switches on and off based on the water level in the preheated insulated water tank 1 to maintain a reasonable water level. In addition, remote intelligent control is achieved through the cooperation of PLC controller 16, edge gateway 17, and mobile APP 18, allowing users to conveniently manage the equipment. This device comprehensively ensures efficient, energy-saving, stable, and intelligent control of the hot water supply, greatly improving the performance of the hot water supply system and the user experience.

[0036] The working principle of the above embodiments is as follows:

[0037] First, in the heating stage, the preheated insulated water tank 1 is connected to the cold water solenoid valve 9 via the preheating heat pump 3 and the preheating circulation pump 5. Once the cold water solenoid valve 9 is opened, low-temperature water flows into the preheated insulated water tank 1. At this time, the preheating heat pump 3 starts, absorbing heat through heat pump technology, and then driving the water in the tank to circulate continuously through the preheating circulation pump 5, thereby efficiently heating the low-temperature water. At the same time, the constant-temperature insulated water tank 2 is connected to the water delivery pump 7 via the constant-temperature heat pump 4 and the constant-temperature circulation pump 6. The constant-temperature heat pump 4 works to maintain a constant water temperature in the tank, thereby ensuring a constant temperature state of the water supply network and ensuring that the temperature of hot water is stable when it is transported through the network.

[0038] Secondly, the energy-saving mechanism starts to operate. The temperature difference pump 8 and the water pump 7 work together. When the temperature sensor T112 detects that the temperature in the preheated insulated water tank 1 is lower than the set value, and the temperature sensor T213 detects that the temperature in the constant-temperature insulated water tank 2 is higher than the set value, the temperature difference pump 8 starts to transport the high-temperature water in the constant-temperature insulated water tank 2 to the preheated insulated water tank 1. The heat of the high-temperature water is used to heat the low-temperature water, realizing the secondary utilization of energy and achieving the purpose of energy saving.

[0039] Next, regarding water supply, the water supply pump 11 is controlled by the pressure sensor P15. When the user uses water, causing the pipeline pressure to drop, the pressure sensor P15 senses the pressure change and transmits the signal to the water supply pump 11. The water supply pump 11 then starts the frequency conversion regulation function, automatically adjusting the pump speed according to the pressure change to increase the water supply, thereby maintaining the pipeline pressure constant, realizing frequency conversion constant pressure water supply, and ensuring stable water pressure for users.

[0040] Next, the return water principle comes into play. The temperature sensor T314 on the return water pipe monitors the return water temperature in real time. Once the return water temperature is lower than the set value, the temperature sensor T314 transmits a signal to the return water solenoid valve 10. The return water solenoid valve 10 opens, allowing the water in the return water pipe to flow back into the system for heating, keeping the return water temperature stable and ensuring the stability of the entire hot water supply system.

[0041] Finally, the control principle runs through the entire equipment operation process. The core control of the equipment is undertaken by the PLC controller 16. The PLC controller 16 collects data from temperature sensors 12, 13, and 14 and pressure sensor P15. According to the preset program logic, it controls the operating status of equipment such as preheating heat pump 3, constant temperature heat pump 4, preheating circulation pump 5, constant temperature circulation pump 6, water supply pump 7, temperature difference pump 8, cold water solenoid valve 9, and return water solenoid valve 10. At the same time, the PLC controller 16 communicates with the mobile APP 18 through the edge gateway 17. Users can remotely send commands to the PLC controller 16 through the mobile APP 18 to operate the equipment, realize remote intelligent control, and greatly facilitate the user's management of the equipment.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intelligent energy-saving hot water supply device, characterized by comprising: The application relates to a preheating and constant-temperature water heating system. The preheating water tank (1) is connected with the cold water electromagnetic valve (9) through the preheating heat pump (3) and the preheating circulating pump (5) and is used for heating low-temperature water; the constant-temperature water tank (2) is connected with the water feeding pump (7) through the constant-temperature heat pump (4) and the constant-temperature circulating pump (6) and is used for maintaining constant temperature of a water supply pipe network; the temperature difference pump (8) is linked with the water feeding pump (7) and is used for conveying high-temperature water in the constant-temperature water tank (2) to the preheating water tank (1) to heat the low-temperature water; the water feeding pump (11) is controlled by the pressure sensor P (15) and is used for frequency conversion constant-pressure water supply; the return water electromagnetic valve (10) is controlled by the temperature sensor T3 (14) and is used for maintaining stable return water pipe temperature; the PLC controller (16) communicates with the mobile phone APP (18) through the edge gateway (17) to realize remote intelligent control. The preheating water tank (1) and the constant-temperature water tank (2) are connected in series through the water feeding pump (7), and the water outlet of the preheating water tank (1) is communicated with the water inlet of the constant-temperature water tank (2).

2. The energy-saving hot water supply device according to claim 1, characterized in that: The working modes of the preheating heat pump (3) and the constant-temperature heat pump (4) are respectively controlled by the temperature sensor T1 (12) and the temperature sensor T2 (13), when the temperature detected by the temperature sensor T1 (12) is lower than the set temperature and the temperature detected by the temperature sensor T2 (13) is higher than the set temperature, the temperature difference pump (8) is started and linked with the water feeding pump (7).

3. The energy-saving hot water supply device according to claim 1, characterized in that: The cold water electromagnetic valve (9) is automatically opened and closed according to the water level of the preheating water tank (1), is opened when the water level is lower than the starting water level and is closed when the water level reaches the stopping water level.

4. The energy-saving hot water supply device according to claim 1, characterized in that: The opening and closing of the return water electromagnetic valve (10) is controlled by the temperature sensor T3 (14) and is opened when the return water temperature is lower than the set value and is closed when the return water temperature reaches the set value.

5. The energy-saving hot water supply device according to claim 1, characterized in that: The PLC controller (16) integrates the signals of the temperature sensor T1 (12), the temperature sensor T2 (13), the temperature sensor T3 (14) and the pressure sensor P (15), uploads data to the mobile phone APP (18) through the edge gateway (17) to realize real-time monitoring and remote operation of system running states.

6. The energy-saving hot water supply device according to claim 1, characterized in that: ​

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