Energy-saving dual-purpose electric heating stove for bathing and heating
By integrating a small programmable logic controller and a solid-state relay into an electric heating boiler, combined with a high-precision temperature sensor and heat exchanger, the problems of inaccurate temperature control, large size, and complex operation have been solved, achieving precise temperature control and ease of use, thus improving user experience and market competitiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI GECHENG SHENGHONG ELECTRIC CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-03
AI Technical Summary
Existing integrated electric boilers suffer from problems such as poor temperature control accuracy, excessive size, and complex operation, which affect user experience and market competitiveness.
It integrates heating and domestic hot water functions using a small programmable logic controller and solid-state relay, combined with an industrial-grade PT100 temperature sensor and a three-way valve to achieve precise temperature control, and separates hot and cold water through a plate heat exchanger. It is equipped with an intuitive and easy-to-use touch screen operating interface.
It achieves precise temperature control, is compact in size, and easy to operate, thus improving the user experience and enhancing market competitiveness and market penetration.
Smart Images

Figure CN224454899U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of electric boilers, and in particular to an energy-saving electric heating boiler that can be used for both heating and bathing. Background Technology
[0002] While current integrated electric boilers on the market offer dual functions of heating and domestic hot water, they generally suffer from the following problems: First, early designs lacked precise temperature control for heating, resulting in poor domestic hot water temperature control and a subpar user experience. Second, in an effort to improve temperature control accuracy, some products were designed to be excessively bulky, failing to meet miniaturization requirements. Third, cost constraints often lead to unfriendly user interfaces and complex, difficult-to-understand operations. These issues collectively contribute to a decline in user experience, affecting not only comfort but also operational difficulty, thus limiting product adoption and market competitiveness.
[0003] Therefore, there is an urgent need in the market for an integrated electric boiler solution that can accurately control temperature, is compact in size, and has a user-friendly operating interface. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides an energy-saving electric heating furnace that can be used for both heating and bathing, with precise temperature control, small size, and a user-friendly operating interface.
[0005] This utility model discloses an energy-saving electric heating boiler that can be used for both heating and bathing. It includes an inner tank with multiple sets of electric heating elements inside. A temperature sensor is installed on the inner tank, and a controller is connected to the temperature sensor via a wire, a relay via a wire, and the relay via the electric heating elements. It also includes a heating component and a domestic hot water component. The heating component supplies hot water heated in the inner tank to the heating system for heating, while the domestic hot water component heats domestic water using the hot water from the inner tank. In use, tap water is poured into the inner tank. The temperature sensor inside the inner tank detects the temperature of the water and feeds the detected temperature value back to the controller. The controller then... The preset temperature and the actual water temperature are controlled by a relay to power the electric heating element, which then heats the tap water inside the inner tank to form hot water. This hot water then flows through the heating element into the home's heating system for warmth, before returning to the inner tank for reheating. The hot water also flows through the domestic hot water component to heat household water for washing or bathing. After heating the domestic water, the hot water returns to the inner tank for reheating. The controller integrates heating and domestic hot water functions into the same inner tank, using precise relay control to regulate temperature and ensure efficient system operation.
[0006] Preferably, the heating assembly includes a hot water pipe, a three-way valve, a heating hot water pipe, a heating return water pipe, a one-way valve, and a return water pipe. The inlet of the hot water pipe is connected to the outlet of the inner tank, the outlet of the hot water pipe is connected to the inlet of the three-way valve, the first set of outlets of the three-way valve is connected to the inlet of the heating hot water pipe, the outlet of the return water pipe is connected to the inlet of the inner tank, the one-way valve is a multi-inlet single-outlet one-way valve, the outlet of the heating return water pipe is connected to one set of inlets of the one-way valve, and the outlet of the one-way valve is connected to the inlet of the return water pipe. In use... The output end of the heating hot water pipe is connected to the input end of the radiator or underfloor heating system in the house. The output end of the radiator or underfloor heating system is connected to the input end of the heating return water pipe. Adjust the three-way valve so that the input end of the three-way valve is connected to the first set of output ends of the three-way valve. This allows the hot water generated in the inner tank to enter the radiator or underfloor heating system through the hot water pipe and the heating hot water pipe for indoor heating. After heating is completed, the hot water returns to the inner tank through the heating return water pipe and the return water pipe for reheating. The one-way valve prevents water backflow and improves safety protection.
[0007] Preferably, the domestic hot water assembly includes a displacement supply pipe, a plate heat exchanger, a displacement return pipe, a tap water pipe, a domestic water pipe, and a domestic hot water pipe. The output end of the tap water pipe is connected to the second set of input ends of a one-way valve, the second set of output ends of a three-way valve is connected to the input end of the displacement supply pipe, the output end of the displacement supply pipe is connected to the first inlet of the plate heat exchanger, the input end of the displacement return pipe is connected to the first outlet of the plate heat exchanger, a domestic water pipe is installed on the tap water pipe, the output end of the domestic water pipe is connected to the second inlet of the plate heat exchanger, the second outlet of the plate heat exchanger is connected to the input end of the domestic hot water pipe, and the output end of the displacement return pipe is connected to the third set of input ends of the one-way valve. When using domestic hot water, the three-way valve is operated to rotate, so that the input end of the three-way valve is connected to the third set of input ends of the one-way valve. The second set of output terminals of the three-way valve is connected, and the input terminal of the three-way valve is physically isolated from the first set of output terminals of the three-way valve. This allows the hot water heated in the inner tank to enter the plate heat exchanger through the hot water pipe and the displacement water supply pipe. Tap water enters the plate heat exchanger through the tap water pipe and the domestic water pipe. The hot water heats the tap water in the plate heat exchanger. The heated tap water is then supplied to people for washing and bathing through the domestic hot water pipe. After the hot water in the plate heat exchanger heats the tap water, its temperature drops and it returns to the inner tank through the displacement return pipe and the return pipe for reheating. The three-way valve automatically cuts off the heating cycle when domestic hot water is needed, and the heat is transferred to the domestic water side through the efficient plate heat exchanger, thus achieving separation of hot and cold water without interference.
[0008] Preferably, the controller is a small programmable logic controller (PLC), and the relay is a solid-state relay. The PLC integrates heating and domestic hot water functions into the same inner tank, and achieves temperature regulation through precise control of the solid-state relay, ensuring efficient system operation.
[0009] Preferably, the temperature sensor is an industrial-grade PT100 temperature sensor; the industrial-grade PT100 temperature sensor can provide high-precision measurement results of ±0.1℃, ensuring the stability and reliability of the system, and adopts industrial standard design, which extends the overall service life of the equipment.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, tap water is injected into the inner tank. The temperature sensor inside the inner tank detects the temperature of the water inside the tank and feeds the detected temperature value back to the controller. The controller, based on the preset temperature and the actual water temperature, supplies power to the electric heating element through a relay, thereby heating the tap water inside the inner tank to form hot water. The hot water can then enter the home's heating system through the heating component for heating, and then return to the inner tank for recirculation and heating. The hot water also heats domestic water through the domestic hot water component, and after heating, it is used for washing or bathing. After heating the domestic water, the hot water returns to the inner tank for reheating. The controller integrates heating and domestic hot water functions into the same inner tank, and achieves temperature regulation through precise control of the relay, ensuring efficient system operation. Attached Figure Description
[0011] Figure 1 This is a structural block diagram of the present invention. Detailed Implementation
[0012] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.
[0013] Example 1
[0014] like Figure 1 As shown, this utility model discloses an energy-saving electric heating boiler that can be used for both heating and bathing. It includes an inner tank for heating hot water, multiple sets of electric heating tubes inside the inner tank, a temperature sensor on the inner tank, a controller connected to the temperature sensor, a controller connected to a relay, and a relay connected to the electric heating tubes. It also includes a heating component and a domestic hot water component. The heating component is used to input the hot water heated by the inner tank into the heating equipment for heating, and the domestic hot water component is used to heat domestic water with the hot water heated by the inner tank.
[0015] The heating components include a hot water pipe, a three-way valve, a heating hot water pipe, a heating return water pipe, a one-way valve, and a return water pipe. The inlet of the hot water pipe is connected to the outlet of the inner tank, and the outlet of the hot water pipe is connected to the inlet of the three-way valve. The first set of outlets of the three-way valve is connected to the inlet of the heating hot water pipe, and the outlet of the return water pipe is connected to the inlet of the inner tank. The one-way valve is a multi-inlet, single-outlet one-way valve. The outlet of the heating return water pipe is connected to one set of inlets of the one-way valve, and the outlet of the one-way valve is connected to the inlet of the return water pipe.
[0016] In this embodiment, during use, the output end of the heating hot water pipe is connected to the input end of the household radiator or underfloor heating system, and the output end of the radiator or underfloor heating system is connected to the input end of the heating return water pipe. The three-way valve is adjusted so that the input end of the three-way valve is connected to the first set of output ends of the three-way valve, thereby allowing the hot water generated in the inner tank to enter the radiator or underfloor heating system through the hot water pipe and the heating hot water pipe for indoor heating. After heating is completed, the hot water returns to the inner tank through the heating return water pipe and the return water pipe for reheating. The one-way valve prevents backflow of water. The controller integrates the heating and domestic hot water functions into the same inner tank and achieves temperature regulation through precise control of the relay to ensure efficient system operation.
[0017] Example 2
[0018] like Figure 1 As shown, the energy-saving electric heating furnace of this utility model includes an inner tank, which is responsible for heating hot water. The inner tank has multiple sets of electric heating tubes built into it. A temperature sensor is installed on the inner tank. The controller is connected to the temperature sensor wire, the controller is connected to the relay wire, and the relay is connected to the electric heating tube wire. It also includes a heating component and a domestic hot water component. The heating component is used to input the hot water heated by the inner tank into the heating equipment for heating. The domestic hot water component is used to heat the domestic water with the hot water heated by the inner tank.
[0019] The heating components include a hot water pipe, a three-way valve, a heating hot water pipe, a heating return water pipe, a one-way valve, and a return water pipe. The inlet of the hot water pipe is connected to the outlet of the inner tank, the outlet of the hot water pipe is connected to the inlet of the three-way valve, the first set of outlets of the three-way valve is connected to the inlet of the heating hot water pipe, the outlet of the return water pipe is connected to the inlet of the inner tank, the one-way valve is a multi-inlet single-outlet one-way valve, the outlet of the heating return water pipe is connected to one set of inlets of the one-way valve, and the outlet of the one-way valve is connected to the inlet of the return water pipe.
[0020] The domestic hot water assembly includes a displacement supply pipe, a plate heat exchanger, a displacement return pipe, a tap water pipe, a domestic water pipe, and a domestic hot water pipe. The output end of the tap water pipe is connected to the second set of input ends of a one-way valve. The second set of output ends of a three-way valve is connected to the input end of the displacement supply pipe. The output end of the displacement supply pipe is connected to the first inlet of the plate heat exchanger. The input end of the displacement return pipe is connected to the first outlet of the plate heat exchanger. A domestic water pipe is installed on the tap water pipe. The output end of the domestic water pipe is connected to the second inlet of the plate heat exchanger. The second outlet of the plate heat exchanger is connected to the input end of the domestic hot water pipe. The output end of the displacement return pipe is connected to the third set of input ends of a one-way valve.
[0021] The controller is a small programmable logic controller, and the relay is a solid-state relay;
[0022] The temperature sensor is an industrial-grade PT100 temperature sensor.
[0023] In this embodiment, during use, the output end of the heating hot water pipe is connected to the input end of the household radiator or underfloor heating system, and the output end of the radiator or underfloor heating system is connected to the input end of the heating return water pipe. The three-way valve is adjusted so that its input end is connected to the first set of output ends. This allows the hot water generated in the inner tank to enter the radiator or underfloor heating system through the hot water pipe and the heating hot water pipe for indoor heating. After heating is complete, the water returns to the inner tank through the heating return water pipe and the return water pipe for reheating. A one-way valve prevents backflow. When using domestic hot water, the three-way valve is operated to connect its input end to the second set of output ends, and also to connect the input end of the three-way valve to the three-way... The first set of output terminals of the valve is physically isolated, allowing hot water heated in the inner tank to enter the plate heat exchanger through the hot water pipe and the displacement water supply pipe. Tap water enters the plate heat exchanger through the tap water pipe and the domestic water pipe. The hot water heats the tap water in the plate heat exchanger, and the heated tap water is then supplied to people for washing and bathing through the domestic hot water pipe. After the hot water in the plate heat exchanger heats the tap water, its temperature drops and it returns to the inner tank through the displacement return pipe and the return pipe for reheating. The three-way valve automatically cuts off the heating cycle when domestic hot water is needed, and the heat is transferred to the domestic water side through the high-efficiency plate heat exchanger, thus achieving separation of hot and cold water without interference.
[0024] The main functions achieved by this utility model are:
[0025] 1. This solution uses a small programmable logic controller (PLC) to integrate heating and domestic hot water functions into the same heating tank, and achieves temperature regulation through precise control of solid-state relays to ensure efficient system operation;
[0026] 2. The heating cycle is automatically cut off when domestic hot water is needed using a three-way valve, and the heat is transferred to the domestic water side through a high-efficiency plate heat exchanger, thereby achieving separation of hot and cold water without interference.
[0027] 3. The system utilizes an industrial-grade PT100 temperature sensor, providing high-precision measurement results of ±0.1℃, ensuring system stability and reliability. Furthermore, all key control components are designed to industrial standards, extending the overall service life of the equipment.
[0028] 4. Equipped with an intuitive and easy-to-use touchscreen as the human-computer interaction platform, supporting customized operation interface development to meet the personalized needs of different customers. The software interface is user-friendly, allowing non-professionals to quickly get started;
[0029] 5. More precise temperature control, achieving a temperature difference within ±0.5℃. This ensures that customers using domestic water will not experience sudden temperature fluctuations.
[0030] 6. Smaller size, allowing for installation in kitchens, bathrooms, and storage rooms with just 0.5 square meters of wall space;
[0031] 7. Easy to operate, with a simple and intuitive interface and Chinese prompts, allowing users to understand more than 80% of the operating functions without reading the manual.
[0032] The controller and relay of this energy-saving electric heating boiler that can be used for both heating and bathing are commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.
[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. An energy-saving electric heating boiler for both heating and bathing, comprising an inner tank, multiple sets of electric heating tubes built into the inner tank, a temperature sensor installed on the inner tank, a controller connected to the temperature sensor wire, a controller connected to a relay wire, and a relay connected to the electric heating tube wires, characterized in that, It also includes heating components and domestic hot water components. The heating components are used to input the hot water heated in the inner tank into the heating equipment for heating, and the domestic hot water components are used to heat the domestic water supply with the hot water heated in the inner tank.
2. The energy-saving electric heating boiler for both heating and bathing as described in claim 1, characterized in that, The heating components include a hot water pipe, a three-way valve, a heating hot water pipe, a heating return water pipe, a one-way valve, and a return water pipe. The inlet of the hot water pipe is connected to the outlet of the inner tank, and the outlet of the hot water pipe is connected to the inlet of the three-way valve. The first set of outlets of the three-way valve is connected to the inlet of the heating hot water pipe, and the outlet of the return water pipe is connected to the inlet of the inner tank. The one-way valve is a multi-inlet, single-outlet one-way valve. The outlet of the heating return water pipe is connected to one set of inlets of the one-way valve, and the outlet of the one-way valve is connected to the inlet of the return water pipe.
3. The energy-saving electric heating stove according to claim 2, wherein the heating element is arranged in the heating chamber. The domestic hot water assembly includes a displacement supply pipe, a plate heat exchanger, a displacement return pipe, a tap water pipe, a domestic water pipe, and a domestic hot water pipe. The output end of the tap water pipe is connected to the second set of input ends of a one-way valve. The second set of output ends of a three-way valve is connected to the input end of the displacement supply pipe. The output end of the displacement supply pipe is connected to the first inlet of the plate heat exchanger. The input end of the displacement return pipe is connected to the first outlet of the plate heat exchanger. A domestic water pipe is installed on the tap water pipe. The output end of the domestic water pipe is connected to the second inlet of the plate heat exchanger. The second outlet of the plate heat exchanger is connected to the input end of the domestic hot water pipe. The output end of the displacement return pipe is connected to the third set of input ends of the one-way valve.
4. The energy-saving electric heating stove according to claim 1, wherein the heating element is arranged in the heating chamber. The controller is a small programmable logic controller, and the relay is a solid-state relay.
5. The energy-saving electric heating stove for both heating and bathing according to claim 1, wherein The temperature sensor is an industrial-grade PT100 temperature sensor.