Boiler and heat pump coupled heating and domestic hot water supply system
By coupling the boiler with the air source heat pump unit, the problem of equipment redundancy caused by the independent setting of heating and domestic hot water supply systems is solved, and the system achieves efficient, stable operation and energy-saving effect.
Patent Information
- Application Number
- CN202520640424.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-07
AI Technical Summary
When heating and domestic hot water supply systems are set up independently in northern regions, boilers are often left idle as backup equipment, failing to play their full role and resulting in equipment redundancy and wasted costs.
By coupling the boiler with an air source heat pump unit, and through the cooperation of heat exchangers and electric regulating valves, the system can achieve coordinated operation of heating and domestic hot water supply. By utilizing the complementarity between the air source heat pump unit and the boiler, the water flow rate can be adjusted according to temperature requirements to ensure the system is stable and efficient.
It achieves efficient and stable operation of heating and domestic hot water supply systems, reduces equipment redundancy, maximizes energy saving, and meets the needs of different seasons and temperatures.
Smart Images
Figure CN223939514U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating equipment technology, specifically to a boiler and heat pump coupled heating and domestic hot water supply system. Background Technology
[0002] In northern regions, air source heat pumps are widely used for heating and domestic hot water supply, and their energy-saving and environmentally friendly advantages are becoming increasingly prominent, aligning with the green and low-carbon theme.
[0003] Currently, in air source heat pump applications, the outlet water temperature of the equipment is low, generally around 50℃. In domestic hot water systems, it is often necessary to run the system with high-temperature water (above 70℃) for a period of time to sterilize the pipes. When outdoor temperatures are low in winter, the air source equipment operates inefficiently or even fails to operate. To ensure system stability under extreme winter weather conditions, a boiler is usually set up as a backup heat source. However, this results in equipment redundancy, as the boiler is mostly idle and inefficient. Due to differences in usage time and temperature, independent setups for heating and domestic hot water systems, each ensuring its own operation and stability, further increase equipment redundancy.
[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0005] To overcome the shortcomings of existing technologies, a boiler-heat pump coupled heating and domestic hot water supply system is provided to solve the problem that in northern regions, heating and domestic hot water supply systems are set up independently, with the boiler used as a backup device and left idle most of the time, failing to fully utilize its function.
[0006] To achieve the above objectives, a boiler-heat pump coupled heating and domestic hot water supply system is provided, comprising:
[0007] The boiler is connected to domestic hot water users via a first output pipe and a first input pipe, respectively.
[0008] An air source heat pump unit is connected to a heating user via a second output pipe and a second input pipe, respectively. The second output pipe is connected to the first output pipe via a first branch pipe, and the first input pipe is connected to the second input pipe via a second branch pipe.
[0009] A heat exchanger having a high-temperature flow channel and a low-temperature flow channel, wherein the inlet of the high-temperature flow channel is connected to the first output channel via a third input pipe, the outlet of the high-temperature flow channel is connected to the first input channel via a third output pipe, the inlet of the low-temperature flow channel is connected to the second input channel via a fourth input pipe, and the outlet of the low-temperature flow channel is connected to the second output channel via a fourth output pipe.
[0010] A temperature sensor is installed at the end of the second output pipe;
[0011] An electric regulating valve is installed in the fourth output pipeline.
[0012] Furthermore, valves are installed on the first output pipe, the first input pipe, the second output pipe, the second input pipe, the third input pipe, the third output pipe, the fourth input pipe, the fourth output pipe, the first branch pipe, and the second branch pipe, respectively.
[0013] Furthermore, the valve is an electric valve.
[0014] Furthermore, the number of air source heat pump units is two sets, the second output pipes of the two sets of air source heat pump units are connected through a first connecting pipe, and the second input pipes of the two sets of air source heat pump units are connected through a second connecting pipe.
[0015] Furthermore, the first input pipeline and the second input pipeline are each equipped with a circulating water pump.
[0016] Furthermore, the heat exchanger is a plate heat exchanger.
[0017] The beneficial effects of this utility model are that the boiler and heat pump coupled heating and domestic hot water supply system of this utility model combines the advantages of heating and domestic hot water supply equipment through coupling. The coupled system can provide heating and domestic hot water at the same time. The system is energy-saving and stable. Moreover, by coordinating the use time, the equipment capacity is complemented, which will not cause system redundancy and enable the system to operate stably and efficiently all year round.
[0018] The present invention relates to a boiler and heat pump coupled heating and domestic hot water supply system, wherein the air source heat pump unit is a high-temperature hot water type, which can meet the temperature requirements for domestic hot water.
[0019] The boiler of this utility model is coupled with a heat pump to provide heating and domestic hot water to supplement the heating system. The boiler provides indirect heat supplementation through a heat exchanger, which will not affect the pressure of the heating system.
[0020] The air source heat pump unit of this utility model, which is a boiler and heat pump coupled heating and domestic hot water supply system, is split into two groups that can operate independently.
[0021] In this utility model, an electric regulating valve is installed on the heat exchanger pipeline of a boiler and heat pump coupled heating and domestic hot water supply system to adjust the water flow rate based on the feedback from the temperature sensor of the heating pipeline.
[0022] This utility model's boiler-heat pump coupled heating and domestic hot water supply system operates via an air-source heat pump unit during spring, summer, and autumn to provide domestic hot water. In winter, the air-source heat pump unit and boiler operate in conjunction to provide both heating and domestic hot water. The air-source heat pump unit and boiler in this system complement each other, prioritizing system stability and maximizing energy savings. Attached Figure Description
[0023] Other features, objects, and advantages of this application 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 boiler and heat pump coupled heating and domestic hot water supply system according to an embodiment of the present invention. Detailed Implementation
[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.
[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0027] Reference Figure 1 As shown, this utility model provides a boiler and heat pump coupled heating and domestic hot water supply system, including: boiler 1, air source heat pump unit 2, heat exchanger 3, temperature sensor 26 and electric regulating valve 25.
[0028] Boiler 1 is connected to domestic hot water users through the first output pipe a and the first input pipe b.
[0029] The air source heat pump unit 2 is connected to the heating user through the second output pipe c and the second input pipe d. The second output pipe c is connected to the first output pipe a through the first branch pipe e. The first input pipe b is connected to the second input pipe d through the second branch pipe f.
[0030] Heat exchanger 3 has a high-temperature flow channel and a low-temperature flow channel. The inlet of the high-temperature flow channel is connected to the first output channel a via the third input pipe g. The outlet of the high-temperature flow channel is connected to the first input channel b via the third output pipe h. The inlet of the low-temperature flow channel is connected to the second input channel d via the fourth input pipe i. The outlet of the low-temperature flow channel is connected to the second output channel c via the fourth output pipe j.
[0031] Temperature sensor 26 is installed at the end of the second output pipe c.
[0032] The electric regulating valve 25 is installed on the fourth output line j.
[0033] In this embodiment, valves are installed on the first output pipe a, the first input pipe b, the second output pipe c, the second input pipe d, the third input pipe g, the third output pipe h, the fourth input pipe i, the fourth output pipe j, the first branch pipe e, and the second branch pipe f.
[0034] In this embodiment, the valve is an electric valve. Specifically, the valve includes valves 7 to 20.
[0035] There are two air source heat pump units 2. The second output pipes c of the two air source heat pump units 2 are connected through the first connecting pipe k, and the second input pipes d of the two air source heat pump units 2 are connected through the second connecting pipe l.
[0036] The two air source heat pump units 2 can be used independently or switched between systems.
[0037] The first input pipe b and the second input pipe d are each equipped with a circulating water pump.
[0038] Specifically, the first input pipeline b is equipped with a circulating water pump 23.
[0039] A circulating water pump 21 is installed on the second input pipe d of an air source heat pump unit 2.
[0040] Another air source heat pump unit 2 has a circulating water pump 22 installed on its second input pipe d.
[0041] As a preferred embodiment, heat exchanger 3 is a plate heat exchanger.
[0042] In some embodiments, the heat exchanger is a shell-and-tube heat exchanger or a double-tube heat exchanger.
[0043] This utility model's boiler and heat pump coupled heating and domestic hot water supply system has the following multiple usage modes to adapt to different seasons:
[0044] During spring, summer, and autumn, there is only a demand for domestic hot water. At this time, the air source heat pump units operate at high efficiency, and the supply of domestic hot water is mainly provided by the operation of the air source heat pump units. Two sets of air source heat pump units are in operation to provide hot water for domestic hot water user 5. At the same time, boiler 1 stops operating, valves 7-10 are closed, valves 11-14 are opened, valves 15-20 are closed, circulating water pumps 21 and 22 are in operation, and circulating water pump 23 is closed.
[0045] During stable operation in winter, the two air source heat pump units provide hot water to heating user 6. Boiler 1 provides hot water to domestic hot water user 5. At this time, valves 7-10 are open, valves 11-14 are open and closed, valves 15-16 are open, valves 17-20 are closed, and circulating water pumps 21-23 are running. The heating and domestic hot water supply systems operate independently, provided by the two air source heat pump units and boiler 1 respectively.
[0046] During extreme outdoor weather conditions in winter, the two sets of air source heat pump units may experience insufficient heating, requiring boiler 1 to supplement the heat. At this time, boiler 1 operates, providing hot water to domestic hot water users 5, and simultaneously supplementing the heating system through the plate heat exchanger to ensure normal use by heating users 6. Simultaneously, both sets of air source heat pump units are operating, boiler 1 is operating, plate heat exchanger 4 is operating, valves 7-10 are open, valves 11-14 are open / closed, valves 15-20 are open, circulating water pumps 21-23 are operating, and electric regulating valves 24 and 25 are open and adjusted according to temperature sensor 26 to ensure the heating water supply temperature.
[0047] At the beginning and near the end of winter, the hot water demand of heating user 6 is relatively low, and one air source heat pump unit can meet the demand. To fully utilize the high energy efficiency of the air source heat pump unit, another air source heat pump unit is connected in parallel with boiler 1 to provide hot water for domestic hot water user 5. At this time, both air source heat pump units are operating, boiler 1 is operating at partial load, the plate heat exchanger is not operating, valves 7-8 are open, valves 9-10 are closed, valves 11-12 are closed, valves 13-14 are open, valves 15-16 are open, valves 17-20 are closed, and circulating water pumps 21-23 are operating. To ensure stable system operation, the two air source heat pump units can switch between each other's systems. At this time, valves 7-8 and 9-10 switch between open and closed states, and valves 11-12 and 13-14 switch between open and closed states.
[0048] When the domestic hot water pipeline system requires high-temperature water sterilization, boiler 1 is turned on to provide high-temperature water above 70℃. At this time, the domestic hot water system is only supplied by boiler 1.
[0049] This utility model relates to a boiler and heat pump coupled heating and domestic hot water supply system. By coupling, the advantages of heating and domestic hot water supply equipment are combined. The coupled system can provide heating and domestic hot water simultaneously. The system is energy-saving and stable. Furthermore, by coordinating the usage time, the equipment capacity is complemented, which will not cause system redundancy and ensure that the system operates stably and efficiently throughout the year.
[0050] The present invention relates to a boiler and heat pump coupled heating and domestic hot water supply system, wherein the air source heat pump unit is a high-temperature hot water type, which can meet the temperature requirements for domestic hot water.
[0051] The boiler of this utility model is coupled with a heat pump to provide heating and domestic hot water to supplement the heating system. The boiler provides indirect heat supplementation through a heat exchanger, which will not affect the pressure of the heating system.
[0052] The air source heat pump unit of this utility model, which is a boiler and heat pump coupled heating and domestic hot water supply system, is split into two groups that can operate independently.
[0053] In this utility model, an electric regulating valve is installed on the heat exchanger pipeline of a boiler and heat pump coupled heating and domestic hot water supply system to adjust the water flow rate based on the feedback from the temperature sensor of the heating pipeline.
[0054] This utility model's boiler-heat pump coupled heating and domestic hot water supply system operates via an air-source heat pump unit during spring, summer, and autumn to provide domestic hot water. In winter, the air-source heat pump unit and boiler operate in conjunction to provide both heating and domestic hot water. The air-source heat pump unit and boiler in this system complement each other, prioritizing system stability and maximizing energy savings.
[0055] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.
Claims
1. A boiler-heat pump coupled heating and domestic hot water supply system, characterized in that, include: The boiler is connected to domestic hot water users via a first output pipe and a first input pipe, respectively. An air source heat pump unit is connected to a heating user via a second output pipe and a second input pipe, respectively. The second output pipe is connected to the first output pipe via a first branch pipe, and the first input pipe is connected to the second input pipe via a second branch pipe. A heat exchanger having a high-temperature flow channel and a low-temperature flow channel, wherein the inlet of the high-temperature flow channel is connected to the first output channel via a third input pipe, the outlet of the high-temperature flow channel is connected to the first input channel via a third output pipe, the inlet of the low-temperature flow channel is connected to the second input channel via a fourth input pipe, and the outlet of the low-temperature flow channel is connected to the second output channel via a fourth output pipe. A temperature sensor is installed at the end of the second output pipe; An electric regulating valve is installed in the fourth output pipeline.
2. The boiler and heat pump coupled heating and domestic hot water supply system according to claim 1, characterized in that, Valves are installed on the first output pipeline, the first input pipeline, the second output pipeline, the second input pipeline, the third input pipeline, the third output pipeline, the fourth input pipeline, the fourth output pipeline, the first branch pipe, and the second branch pipe, respectively.
3. The boiler and heat pump coupled heating and domestic hot water supply system according to claim 2, characterized in that, The valve is an electric valve.
4. The boiler and heat pump coupled heating and domestic hot water supply system according to claim 1, characterized in that, The number of air source heat pump units is two sets. The second output pipes of the two sets of air source heat pump units are connected through a first connecting pipe, and the second input pipes of the two sets of air source heat pump units are connected through a second connecting pipe.
5. The boiler and heat pump coupled heating and domestic hot water supply system according to claim 1, characterized in that, The first input pipeline and the second input pipeline are each equipped with a circulating water pump.
6. The boiler and heat pump coupled heating and domestic hot water supply system according to claim 1, characterized in that, The heat exchanger is a plate heat exchanger.