Two-stage heating system of air source heat pump

Abstract

According to the air source heat pump two-stage heating system, an air source heat pump unit compresses a low-temperature and low-pressure refrigerant into high-temperature and high-pressure gas through a compressor, and heat is transferred to outdoor air / circulating water through a water side / air side heat exchanger. The first-stage heating system is connected with the air energy collecting device and used for primarily increasing the water temperature; the second-stage heating system is connected with the first-stage heating system and is used for further raising the water temperature to the required supply temperature; according to the system, through a series-parallel connection two-stage heating mechanism of air energy, the system flow is effectively reduced, matching with an existing heating system with a small pipe diameter becomes possible, the temperature of supplied water and returned water is remarkably increased, and therefore the good tail end heating effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of heat pump technology, and in particular to a two-stage heating system for an air source heat pump. Background Technology

[0002] With increasing awareness of energy issues and environmental protection, efficient, energy-saving, and environmentally friendly heating technologies are receiving more and more attention. While traditional single-stage air-source heat pump systems can provide some heating capacity, their efficiency and stability are often unsatisfactory in extreme weather or high-demand heating scenarios. This is especially true in the renovation of older buildings, where traditional single-stage heating systems struggle to achieve ideal heating results due to the small diameter of the existing pipes. Therefore, developing a technical solution that can adapt to small-diameter systems while improving heating efficiency is particularly important. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by proposing a two-stage heating system for air source heat pumps that significantly improves the supply and return water temperatures, thereby ensuring good terminal heating effect.

[0004] The technical problem to be solved by this utility model is achieved through the following technical solution: a two-stage heating system for an air source heat pump, characterized by:

[0005] Including air energy harvesting devices,

[0006] Air source heat pump systems include air source heat pump units, heat exchangers, and outdoor circulation systems.

[0007] Air source heat pump units use a compressor to compress low-temperature, low-pressure refrigerant into high-temperature, high-pressure gas, and then transfer heat to the air / circulating water of the outdoor circulation system through a water-side / air-side heat exchanger.

[0008] A primary heating system, connected to the air energy harvesting device, is used to initially raise the water temperature;

[0009] A secondary heating system, connected to the primary heating system, is used to further increase the water temperature to the required supply temperature;

[0010] A circulating water pump, installed on the return water pipeline, is used to maintain the flow of water within the system;

[0011] The control system is used to monitor and adjust the operating status of the air energy harvesting device, primary heating, secondary heating and circulating water pump;

[0012] The return water pipeline is connected to the primary heating system via a circulating water pump;

[0013] The outlet pipe is connected to the secondary heating system and is used to deliver the heated hot water to the user.

[0014] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: the primary heater and the secondary heater adopt an independent control mode, and the number of units in operation and the heating power can be adjusted according to actual needs such as ambient temperature and terminal load.

[0015] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: the control system includes a temperature sensor, a pressure sensor and a controller, wherein the temperature sensor and the pressure sensor are used to detect temperature and pressure changes in the system, respectively, and the controller automatically adjusts the working state of each component according to the detection data.

[0016] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: a bidirectional flushing pipeline is provided between the primary heater and the secondary heater.

[0017] Compared with the prior art, this utility model proposes a two-stage heating system for air source heat pumps. This system, through a series-parallel two-stage heating mechanism of air energy, not only effectively reduces the system flow rate, making it possible to match existing heating systems with smaller pipe diameters, but also significantly increases the supply and return water temperatures, thereby ensuring good terminal heating effect. Attached Figure Description

[0018] Figure 1 This is a simplified structural diagram of the present invention. Detailed Implementation

[0019] The specific technical solutions of the present invention are further described below. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, and to facilitate a better understanding of the present invention by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments, and do not constitute a limitation on its rights. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] A two-stage heating system for air source heat pumps.

[0021] Including air energy harvesting devices,

[0022] Air source heat pump systems include air source heat pump units, heat exchangers, and outdoor circulation systems.

[0023] Air source heat pump units use a compressor to compress low-temperature, low-pressure refrigerant into high-temperature, high-pressure gas, and then transfer heat to the air / circulating water of the outdoor circulation system through a water-side / air-side heat exchanger.

[0024] The primary heating system 1 is connected to the air energy collection device and is used to initially raise the water temperature;

[0025] Secondary heating system 2, connected to the primary heating system, is used to further increase the water temperature to the required supply temperature;

[0026] The circulating water pump 3 is installed on the return water pipe 6 to maintain the flow of water in the system;

[0027] Control system 7 is used to monitor and adjust the working status of the air energy collection device, primary heating, secondary heating and circulating water pump;

[0028] Return water pipe 6 is connected to the primary heating system via a circulating water pump;

[0029] Water outlet pipe 4 is connected to the secondary heating system and is used to deliver heated hot water to the user.

[0030] The primary and secondary heaters are controlled independently, and the number of units in operation and the heating power can be adjusted according to actual needs such as ambient temperature and terminal load.

[0031] The control system includes a temperature sensor, a pressure sensor, and a controller. The temperature sensor and pressure sensor are used to detect temperature and pressure changes within the system, respectively, while the controller automatically adjusts the operating status of each component based on the detected data. The temperature sensor may include an ambient temperature sensor or an internal system temperature sensor.

[0032] A bidirectional flushing pipeline is installed between the primary heater and the secondary heater, including a bidirectional flushing valve designed for the main pipeline. By using different valve opening and closing methods, the system end and the heat source section can be flushed separately, effectively preventing debris from entering the unit and causing damage.

[0033] Primary heating: First, the air energy harvesting device absorbs heat from the outside air and transfers this energy to the water in the primary heating system through refrigerant circulation, thus initially raising the water temperature.

[0034] Secondary heating: Subsequently, the water that has been heated in the first stage enters the secondary heating system. In this stage, the water temperature is further increased to the required level by the second stage air energy.

[0035] Flow control: By adjusting the working status of the circulating water pump and the connection method between the heaters (series or parallel), the water flow rate in the system can be flexibly adjusted to meet the needs of pipes with different diameters.

[0036] More stable and reliable: The air source heat pump adopts a two-stage heating mechanism in series and parallel, which effectively solves the problem of excessive flow in small-diameter systems.

[0037] Excellent heating effect: The increased supply and return water temperatures ensure good heating performance even in extremely low temperature environments.

[0038] Wide range of applications: The system is flexibly designed and can be customized according to actual application scenarios, making it suitable for various types of building heating needs.

Claims

1. A two-stage heating system for an air source heat pump, characterized in that: Including air energy harvesting devices, Air source heat pump systems include air source heat pump units, heat exchangers, and outdoor circulation systems. Air source heat pump units use a compressor to compress low-temperature, low-pressure refrigerant into high-temperature, high-pressure gas, and then transfer heat to the air / circulating water of the outdoor circulation system through a water-side / air-side heat exchanger. A primary heating system, connected to the air energy harvesting device, is used to initially raise the water temperature; A secondary heating system, connected to the primary heating system, is used to further increase the water temperature to the required supply temperature; A circulating water pump, installed on the return water pipeline, is used to maintain the flow of water within the system; The control system is used to monitor and adjust the operating status of the air energy harvesting device, primary heating, secondary heating and circulating water pump; The return water pipeline is connected to the primary heating system via a circulating water pump; The outlet pipe is connected to the secondary heating system and is used to deliver the heated hot water to the user.

2. The two-stage heating system of the air source heat pump according to claim 1, characterized in that: The primary and secondary heating systems are controlled independently, adjusting the number of operating units and heating power according to the actual needs of ambient temperature and terminal load.

3. The two-stage heating system of an air source heat pump according to claim 1, characterized in that: The control system includes a temperature sensor, a pressure sensor, and a controller. The temperature sensor and the pressure sensor are used to detect temperature and pressure changes within the system, respectively, while the controller automatically adjusts the operating status of each component based on the detection data.

4. The two-stage heating system of an air source heat pump according to claim 1, characterized in that: A bidirectional flushing pipeline is installed between the primary heating system and the secondary heating system.

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