Combined heat supply system based on air source-water source heat pump

Abstract

The utility model discloses a combined heat supply system based on an air source-water source heat pump, which comprises an air source heat pump unit, a water source heat pump unit, a user terminal and a controller, the air source heat pump unit is connected with the user terminal through a first circulating pipeline, and the water source heat pump unit is connected with the user terminal through a second circulating pipeline. The water source heat pump unit is connected with the first circulation pipeline through a third circulation pipeline, the controller is connected with the air source heat pump unit and the water source heat pump unit, and the controller controls the air source heat pump unit and the water source heat pump unit to work. The device has the beneficial effect of lower operation cost. And on the other hand, if electric heating or fuel gas or other modes are adopted for local heating, the system is complex, energy consumption is high, implementation is more tedious, and the combined heating system is simple in structure, convenient to operate and easier to implement.

Description

Technical Field

[0001] This utility model relates to a combined heating system, and more particularly to a combined heating system based on an air source-water source heat pump. Background Technology

[0002] Currently, in cold regions, air source heat pumps, with their low energy consumption and high efficiency, are suitable for heating and hot water needs in residential, commercial, and industrial sectors. However, the performance of air source heat pumps is often affected by ambient temperature. At lower outside temperatures, the heating efficiency and outlet water temperature of the heat pump decrease significantly, making its heating capacity insufficient in cold regions or applications requiring high-temperature hot water. Water source heat pumps utilize water bodies (such as groundwater, lakes, and rivers) as a heat source, featuring stable heat supply and high efficiency. Compared to air source heat pumps, water source heat pumps perform better in high-temperature heating, meeting the needs of industrial and civil buildings for high-temperature hot water and heating. However, suitable water sources are limited by practical conditions. For example, using an air source heat pump to create the conditions required for a water source heat pump—that is, combining both heat pumps to produce high-temperature hot water to meet the building's heating needs—solves the problem of a single air source heat pump being unable to produce high-temperature water, and also addresses the issue of water source heat pumps lacking suitable water sources. Summary of the Invention

[0003] The main purpose of this invention is to solve the problems of single air source heat pumps being unable to reach high-temperature water and water source heat pumps lacking suitable water sources, and to provide a combined air source and water source heat pump heating system.

[0004] The air-source heat pump combined heating system provided by this utility model includes an air-source heat pump unit, a water-source heat pump unit, a user terminal, and a controller. The air-source heat pump unit is connected to the user terminal through a first circulation pipeline, the water-source heat pump unit is connected to the user terminal through a second circulation pipeline, and the water-source heat pump unit is connected to the first circulation pipeline through a third circulation pipeline. The controller is connected to both the air-source heat pump unit and the water-source heat pump unit, and controls the operation of the air-source heat pump unit and the water-source heat pump unit.

[0005] The first circulation pipeline is equipped with a first electric valve, a second electric valve, and a first circulating water pump. The first electric valve, the second electric valve, and the first circulating water pump are all connected to a controller, which controls the operation of the first electric valve, the second electric valve, and the first circulating water pump.

[0006] The second circulation pipeline is equipped with a third electric valve and a second circulating water pump. Both the third electric valve and the second circulating water pump are connected to the controller, which controls the operation of the third electric valve and the second circulating water pump.

[0007] The third circulation pipeline is equipped with a fourth electric valve and a third circulation water pump. Both the fourth electric valve and the third circulation water pump are connected to a controller, which controls the operation of the fourth electric valve and the third circulation water pump.

[0008] The user terminal is equipped with a first temperature sensor, the first circulation pipeline is equipped with a second temperature sensor, and the third circulation pipeline is equipped with a third temperature sensor. The first, second, and third temperature sensors are all connected to the controller. The controller controls the operation of the air source heat pump unit, the water source heat pump unit, the first electric valve, the second electric valve, the first circulating water pump, the third electric valve, the second circulating water pump, the fourth electric valve, and the third circulating water pump respectively based on the data transmitted by the first, second, and third temperature sensors.

[0009] The controller includes a monitor, a server, a NAE network control engine, and a DDC field controller. The server is connected to both the monitor and the NAE network control engine via network cables. The NAE network control engine is connected to the DDC field controller via signal cables. The NAE network control engine is model MS-NAE451L-2, and the DDC field controller is model MS-FAC3613-0. The DDC field controller is connected to analog input channels AI and digital input channels DI. The analog input channels AI and DI are used to collect real-time field data. The analog signals are converted into digital signals that can be processed by the computer through A / D conversion for control output. The control signals are converted into analog signals through D / A conversion, and the analog output channels AO and DO connected to the DDC field controller directly control the operation of the equipment.

[0010] The first, second, and third temperature sensors are connected to the analog input channel AI of the DDC field controller via signal lines. These sensors transmit temperature parameters to the DDC field controller through the AI. The air-source heat pump unit and the water-source heat pump unit are connected to the analog input channel AI and analog output channel AO of the DDC field controller via signal lines, respectively. These units provide temperature and flow information back to the DDC field controller through the AI. The DDC field controller controls the start and stop of the air-source and water-source heat pump units through the analog output channel AO. The first circulating water pump, the second circulating water pump... The circulating water pump, the third circulating water pump, the first electric valve, the second electric valve, the third electric valve, and the fourth electric valve are connected to the digital input channel DI and the digital output channel DO of the DDC field controller via signal lines. The first circulating water pump, the second circulating water pump, the third circulating water pump, the first electric valve, the second electric valve, the third electric valve, and the fourth electric valve provide feedback on their operating status and fault alarms to the DDC field controller via the digital input channel DI. The DDC field controller controls the start and stop of the first circulating water pump, the second circulating water pump, the third circulating water pump, the first electric valve, the second electric valve, the third electric valve, and the fourth electric valve via the digital output channel DO based on the temperature data transmitted by the first temperature sensor, the second temperature sensor, and the third temperature sensor.

[0011] The air source heat pump unit, water source heat pump unit, first electric valve, second electric valve, first circulating water pump, third electric valve, second circulating water pump, fourth electric valve, third circulating water pump, first temperature sensor, second temperature sensor, third temperature sensor, display and server mentioned above are all assemblies of existing equipment, so the specific models and specifications are not described in detail.

[0012] The working principle of this utility model:

[0013] This utility model provides an air-source-water-source heat pump combined heating system that intelligently adjusts its operation to save energy based on the user's required ambient temperature, actual operating needs, and sensor feedback parameters during operation. The controller commands the first circulating water pump to start, after which the air-source heat pump unit operates, and the water-source heat pump unit stops operating. A first temperature sensor monitors the user's ambient temperature in real time. When the building's specific ambient temperature reaches the required set T1, the first temperature sensor transmits a signal to the controller, which then controls the start / stop status of the air-source heat pump unit.

[0014] When the first temperature sensor fails to reach the desired set temperature T1, the water source heat pump unit is activated, and the second and third temperature sensors are monitored in real time. When the third temperature sensor reaches the minimum return water temperature of the air source heat pump unit (25°C), it transmits a signal to the controller, which then instructs the water source heat pump unit and the third circulating water pump to stop operating. If the second temperature sensor installed on the first circulation pipeline reaches above 30°C within a short period, the above operation is repeated.

[0015] The beneficial effects of this utility model are:

[0016] The air-source-water-source heat pump combined heating system provided by this invention addresses the issue of high-temperature heat loads in buildings with special environmental conditions, where these loads constitute a relatively small proportion of the building's total heat load. This invention utilizes a water-source heat pump to extract heat from the return water of the air-source heat pump heating system, without affecting the overall heating effect of the air source, thus improving overall energy efficiency. For buildings, industrial plants, or other special locations during the day, the system optimizes the operating time of both air-source and water-source heat pumps, resulting in lower operating costs. Furthermore, using electric or gas heating for localized heating is not only complex and energy-intensive but also more cumbersome to implement. The combined heating system provided by this invention is simple in structure, easy to operate, and easier to implement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the air-source-water-source heat pump combined heating system described in this utility model.

[0018] Figure 2 This is a schematic diagram of the control logic described in this utility model.

[0019] Figure 3 This is a block diagram of the controller structure described in this utility model.

[0020] The annotations in the image above are as follows:

[0021] 1. Air source heat pump unit; 2. Water source heat pump unit; 3. User terminal; 4. Controller

[0022] 5. First circulation pipeline; 6. Second circulation pipeline; 7. Third circulation pipeline

[0023] 8. First electric valve; 9. Second electric valve; 10. First circulating water pump

[0024] 11. Third electric valve; 12. Second circulating water pump; 13. Fourth electric valve

[0025] 14. Third circulating water pump; 15. First temperature sensor; 16. Second temperature sensor

[0026] 17. Third temperature sensor; 18. Display; 19. Server; 20. NAE network control engine

[0027] 21. DDC Field Controller; 22. Analog Input Channel (AI); 23. Digital Input Channel (DI)

[0028] 24. Analog output channel AO 25. Digital output channel DO Detailed Implementation

[0029] Please see Figures 1 to 3 As shown:

[0030] The air-source heat pump combined heating system provided by this utility model includes an air-source heat pump unit 1, a water-source heat pump unit 2, a user terminal 3, and a controller 4. The air-source heat pump unit 1 is connected to the user terminal 3 through a first circulation pipe 5, the water-source heat pump unit 2 is connected to the user terminal 3 through a second circulation pipe 6, and the water-source heat pump unit 2 is connected to the first circulation pipe 5 through a third circulation pipe 7. The controller 4 is connected to both the air-source heat pump unit 1 and the water-source heat pump unit 2, and controls the operation of the air-source heat pump unit 1 and the water-source heat pump unit 2.

[0031] The first circulation pipeline 5 is equipped with a first electric valve 8, a second electric valve 9 and a first circulating water pump 10. The first electric valve 8, the second electric valve 9 and the first circulating water pump 10 are all connected to the controller 4. The controller 4 controls the operation of the first electric valve 8, the second electric valve 9 and the first circulating water pump 10.

[0032] The second circulation pipeline 6 is equipped with a third electric valve 11 and a second circulating water pump 12. Both the third electric valve 11 and the second circulating water pump 12 are connected to the controller 4, and the controller 4 controls the operation of the third electric valve 11 and the second circulating water pump 12.

[0033] The third circulation pipeline 7 is equipped with a fourth electric valve 13 and a third circulation water pump 14. Both the fourth electric valve 13 and the third circulation water pump 14 are connected to the controller 4, and the controller 4 controls the operation of the fourth electric valve 13 and the third circulation water pump 14.

[0034] The user terminal 3 is equipped with a first temperature sensor 15, the first circulation pipeline 5 is equipped with a second temperature sensor 16, and the third circulation pipeline 7 is equipped with a third temperature sensor 17. The first temperature sensor 15, the second temperature sensor 16, and the third temperature sensor 17 are all connected to the controller 4. The controller 4 controls the operation of the air source heat pump unit 1, the water source heat pump unit 2, the first electric valve 8, the second electric valve 9, the first circulating water pump 10, the third electric valve 11, the second circulating water pump 12, the fourth electric valve 13, and the third circulating water pump 14 respectively based on the data transmitted by the first temperature sensor 15, the second temperature sensor 16, and the third temperature sensor 17.

[0035] Controller 4 includes a display 18, a server 19, a NAE network control engine 20, and a DDC field controller 21. The server 19 is connected to the display 18 and the NAE network control engine 20 via network cables. The NAE network control engine 20 is connected to the DDC field controller 21 via signal lines. The NAE network control engine 20 is model MS-NAE451L-2, and the DDC field controller 21 is model MS-FAC3613-0. The DDC field controller 21 is connected to an analog input channel AI22 and a digital input channel DI23. The analog input channel AI22 and the digital input channel DI23 are used to collect real-time field data. The analog signals are converted into digital signals that can be processed by the computer through A / D conversion for control output. The control signals are converted into analog signals through D / A conversion and are directly controlled by the analog output channel AO24 and the digital output channel DO25 connected to the DDC field controller 21 to control the operation of the equipment.

[0036] The first temperature sensor 15, the second temperature sensor 16, and the third temperature sensor 17 are connected to the analog input channel AI22 of the DDC field controller 21 via signal lines. These sensors transmit temperature parameters to the DDC field controller 21 through AI22. Air source heat pump unit 1 and water source heat pump unit 2 are connected to the analog input channel AI22 and analog output channel AO24 of the DDC field controller 21 via signal lines, respectively. They provide temperature and flow information to the DDC field controller 21 via AI22. The DDC field controller 21 controls the start and stop of air source heat pump unit 1 and water source heat pump unit 2 via AO24. The first circulating water pump 10 and the second circulating water pump 12... The third circulating water pump 14, the first electric valve 8, the second electric valve 9, the third electric valve 11, and the fourth electric valve 13 are connected to the digital input channel DI23 and the digital output channel DO25 of the DDC field controller 21 via signal lines. The first circulating water pump 10, the second circulating water pump 12, the third circulating water pump 14, the first electric valve 8, the second electric valve 9, the third electric valve 11, and the fourth electric valve 13 provide feedback on their operating status and fault alarms to the DDC field controller 21 through the digital input channel DI23. The DDC field controller 21 controls the start and stop of the first circulating water pump 10, the second circulating water pump 12, the third circulating water pump 14, the first electric valve 8, the second electric valve 9, the third electric valve 11, and the fourth electric valve 13 through the digital output channel DO25 based on the temperature data transmitted by the first temperature sensor 15, the second temperature sensor 16, and the third temperature sensor 17.

[0037] The air source heat pump unit 1, water source heat pump unit 2, first electric valve 8, second electric valve 9, first circulating water pump 10, third electric valve 11, second circulating water pump 12, fourth electric valve 13, third circulating water pump 14, first temperature sensor 15, second temperature sensor 16, third temperature sensor 17, display 18 and server 19 mentioned above are all assemblies of existing equipment, so their specific models and specifications are not described in detail.

[0038] The working principle of this utility model:

[0039] The air-source-water-source heat pump combined heating system provided by this utility model intelligently adjusts its operation to save energy based on the ambient temperature requirements of the user terminal, actual operating needs, and sensor feedback parameters during operation. After the controller 4 commands the first circulating water pump 10 to start, the air-source heat pump unit 1 operates, while the water-source heat pump unit 2 stops operating. The first temperature sensor 15 monitors the temperature changes of the user terminal 3 in real time. When the building's specific ambient temperature reaches the required set T1, the first temperature sensor 15 transmits a signal to the controller 4 in real time, and the controller 4 then controls the start / stop status of the air-source heat pump unit 1.

[0040] When the first temperature sensor 15 fails to reach the required set temperature T1, the water source heat pump unit 2 is turned on and the second temperature sensor 16 and the third temperature sensor 17 are monitored in real time. When the third temperature sensor 17 reaches the minimum return water temperature of the air source heat pump unit 1 (25°C), the third temperature sensor 17 transmits a signal to the controller 4, and the controller 4 instructs the water source heat pump unit 2 and the third circulating water pump 14 to stop working. When the second temperature sensor 16 installed on the first circulating pipeline 5 reaches above 30°C within a short period of time, the above operation is repeated.

Claims

1. An air source-water source heat pump combined heating system based on, characterized in that: It includes an air source heat pump unit, a water source heat pump unit, a user terminal, and a controller. The air source heat pump unit is connected to the user terminal through a first circulation pipeline, the water source heat pump unit is connected to the user terminal through a second circulation pipeline, and the water source heat pump unit is connected to the first circulation pipeline through a third circulation pipeline. The controller is connected to both the air source heat pump unit and the water source heat pump unit, and controls the operation of the air source heat pump unit and the water source heat pump unit.

2. The air source-water source heat pump combined heating system according to claim 1, wherein: The first circulation pipeline is equipped with a first electric valve, a second electric valve, and a first circulating water pump. The first electric valve, the second electric valve, and the first circulating water pump are all connected to a controller, which controls the operation of the first electric valve, the second electric valve, and the first circulating water pump.

3. The air source-water source heat pump combined heating system according to claim 1, wherein: The second circulation pipeline is equipped with a third electric valve and a second circulation water pump. Both the third electric valve and the second circulation water pump are connected to a controller, which controls the operation of the third electric valve and the second circulation water pump.

4. The air source-water source heat pump combined heating system according to claim 1, characterized in that: The third circulation pipeline is equipped with a fourth electric valve and a third circulation water pump. Both the fourth electric valve and the third circulation water pump are connected to a controller, which controls the operation of the fourth electric valve and the third circulation water pump.

5. The air source-water source heat pump combined heating system according to claim 1 or 2 or 3 or 4, characterized in that: The user terminal is equipped with a first temperature sensor, a second temperature sensor is equipped on the first circulation pipeline, and a third temperature sensor is equipped on the third circulation pipeline. The first, second, and third temperature sensors are all connected to the controller. The controller controls the operation of the air source heat pump unit, the water source heat pump unit, the first electric valve, the second electric valve, the first circulating water pump, the third electric valve, the second circulating water pump, the fourth electric valve, and the third circulating water pump respectively based on the data transmitted by the first, second, and third temperature sensors.

6. The air source-water source heat pump combined heating system according to claim 5, characterized in that: The controller includes a display, a server, a NAE network control engine, and a DDC field controller. The server is connected to both the display and the NAE network control engine via network cables. The NAE network control engine is connected to the DDC field controller via signal lines. The NAE network control engine is model MS-NAE451L-2, and the DDC field controller is model MS-FAC3613-0. The DDC field controller is connected to analog input channels AI and digital input channels DI. The analog input channels AI and DI are used to collect real-time field data. The analog signals are converted into digital signals that can be processed by the computer through A / D conversion for control output. The control signals are converted into analog signals through D / A conversion, and the operation of the equipment is directly controlled by the analog output channels AO and DO connected to the DDC field controller.

7. The air source-water source heat pump combined heating system according to claim 6, characterized in that: The first, second, and third temperature sensors are connected to the analog input channel AI of the DDC field controller via signal lines. These sensors transmit temperature parameters to the DDC field controller through the AI. The air-source heat pump unit and the water-source heat pump unit are connected to the analog input channel AI and analog output channel AO of the DDC field controller via signal lines, respectively. The air-source heat pump unit and the water-source heat pump unit provide temperature and flow information back to the DDC field controller through the analog input channel AI. The DDC field controller controls the start and stop of the air-source heat pump unit and the water-source heat pump unit through the analog output channel AO. The first circulating water pump, the second... The circulating water pump, the third circulating water pump, the first electric valve, the second electric valve, the third electric valve, and the fourth electric valve are connected to the digital input channel (DI) and the digital output channel (DO) of the DDC field controller via signal lines. The first circulating water pump, the second circulating water pump, the third circulating water pump, the first electric valve, the second electric valve, the third electric valve, and the fourth electric valve provide feedback on their operating status and fault alarms to the DDC field controller via the digital input channel (DI). The DDC field controller controls the start and stop of the first circulating water pump, the second circulating water pump, the third circulating water pump, the first electric valve, the second electric valve, the third electric valve, and the fourth electric valve via the digital output channel (DO) based on the temperature data transmitted by the first temperature sensor, the second temperature sensor, and the third temperature sensor.

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