Multifunctional adjusting type air source heat pump system

Abstract

A multifunctional adjusting type air source heat pump system comprises a plurality of heat pump unit units, each heat pump unit unit comprises a first-stage machine group and a second-stage machine group, each first-stage machine group comprises a plurality of first-stage heat pump units, each second-stage machine group comprises a plurality of second-stage heat pump units, an inlet of each first-stage heat pump unit is communicated with a user side water return port through a water inlet pipe, and an outlet of each second-stage heat pump unit is communicated with a user side water return port through a water outlet pipe. An outlet of the first-stage heat pump unit is communicated with an inlet of the second-stage heat pump unit through a first water outlet pipe, an outlet of the second-stage heat pump unit is communicated with a user side water supply port through a second water outlet pipe, a first control valve controlled by the central control system is installed on the second water outlet pipe, and a bypass pipe is installed between the first water outlet pipe and the second water outlet pipe. And a second control valve controlled by the central control system is mounted on the bypass pipe. The system can flexibly and accurately control series connection and parallel connection between the heat pump units, meanwhile, capacity increase and reduction between the heat pump units can be achieved, the system operation modes are diversified and flexible, the system energy efficiency can be improved, and energy conservation and emission reduction can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a multifunctional regulating air source heat pump system. Background Art

[0002] The air source heat pump system has both summer cooling conditions and winter heating conditions. It can achieve energy-saving operation with large temperature difference and low flow rate, and can also achieve high-efficiency operation of the system under low load conditions.

[0003] The existing air source heat pump system includes multiple air source heat pump units, and the air source heat pump units include multiple heat pump units. Each heat pump unit includes an evaporator and a condenser. A refrigerant circulation pipe is arranged between the evaporator and the condenser. The inlet of the condenser is connected to the return water port of the user-side water loop through the water inlet pipe, and the outlet of the condenser is connected to the water supply port of the user-side water loop through the water outlet pipe. The return water port and the water supply port of the user-side water loop are connected to the refrigeration equipment or heating equipment at the user end. The water inlet pipes connected to the multiple heat pump units of each air source heat pump unit are connected in parallel, the water outlet pipes connected to the multiple air source heat pump units are connected in parallel, the water inlet pipes between the multiple air source heat pump units are connected in parallel, and the water outlet pipes between the multiple air source heat pump units are connected in parallel. The water outlet pipes of each air source heat pump unit are respectively installed with control valves controlled by the central control system. Temperature sensors and flow sensors are installed on the water inlet pipe and the water outlet pipe. The heat pump system transmits the data measured by the temperature sensors and flow sensors on the water inlet pipe and the water outlet pipe to the central control system, and the central control system controls the corresponding control valves according to the data, thereby realizing the operation of the air source heat pump system.

[0004] However, the existing air source heat pump system has a single operation mode, low system energy efficiency, and waste of resources.

[0005] How to design a multifunctional adjustable air source heat pump system so that it can realize flexible series or parallel connection between various air source heat pump units, and can simultaneously realize capacity increase and capacity reduction of each air source heat pump unit, with diverse and flexible movement modes, which can improve system energy efficiency and achieve energy conservation and emission reduction, is a topic that the inventor has devoted himself to studying. Utility Model Content

[0006] The purpose of the utility model is to provide a multifunctional adjustable air source heat pump system, which can flexibly and accurately control the series and parallel connections between heat pump units, and at the same time can realize the capacity increase and reduction between the units of each heat pump unit, and the system operation mode is diverse and flexible, which can improve the system energy efficiency under various operating conditions and achieve energy saving and emission reduction.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a multifunctional regulating air source heat pump system, comprising a plurality of heat pump unit units, wherein the heat pump unit units include a primary group and a secondary group, the primary group includes a plurality of primary heat pump units, the secondary group includes a plurality of secondary heat pump units, the inlet of the primary heat pump unit is connected with the return water port on the user side through a water inlet pipe, the outlet of the primary heat pump unit is connected with the inlet of the secondary heat pump unit through a first water outlet pipe, the outlet of the secondary heat pump unit is connected with the water supply port on the user side through a second water outlet pipe, and the second water outlet pipe is installed with a first control valve controlled by a central control system.

[0008] The utility model discloses a multifunctional regulating air source heat pump system, wherein a bypass pipe is connected between the first water outlet pipe and the second water outlet pipe, and a second control valve controlled by the central control system is installed on the bypass pipe.

[0009] The utility model discloses a multifunctional regulating air source heat pump system, wherein a user side circulating water pump is installed on the user side water return port.

[0010] The utility model discloses a multifunctional regulating air source heat pump system, wherein a water quality processor is installed on the water return port at the user side.

[0011] The utility model discloses a multifunctional regulating air source heat pump system, wherein a constant pressure water replenishment system is installed on the water return port at the user side.

[0012] The utility model discloses a multifunctional regulating air source heat pump system, wherein a first temperature sensor and an electromagnetic flow meter are installed on the water return port on the user side, and the first temperature sensor and the electromagnetic flow meter are connected to the central control system through a signal line.

[0013] The utility model discloses a multifunctional regulating air source heat pump system, wherein a second temperature sensor and a first flow sensor are installed on the first water outlet pipe, and the second temperature sensor and the first flow sensor are connected to the central control system through a signal line.

[0014] The utility model discloses a multifunctional regulating air source heat pump system, wherein a third temperature sensor and a second flow sensor are installed on the second water outlet pipe, and the third temperature sensor and the second flow sensor are connected to the central control system through a signal line.

[0015] After adopting the above scheme, the utility model provides a multifunctional regulating air source heat pump system, based on the collected user-end operation data, that is, collecting the measurement information of temperature sensors, flow sensors, etc. on each pipeline, and under the control support of the central control system, by controlling the opening and closing of the first control valve and the second control valve, and utilizing different conversion connections between the pipelines, to realize the series and parallel relationship between the first-stage heat pump unit and the second-stage heat pump unit in the heat pump unit, and also realize the capacity increase and reduction between the heat pump units, which not only increases the operation mode of the heat pump system, but also improves the flexibility of the operation mode, and also improves the system energy efficiency under the operation mode, thereby realizing energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of a multifunctional regulating air source heat pump system of the utility model.

[0017] Number Description:

[0018] 1-First level cluster 2-Second level cluster

[0019] 3-First-stage heat pump unit 4-Second-stage heat pump unit

[0020] 5-water inlet pipe 6-water return port on user side

[0021] 7-First water outlet pipe 8-Second water outlet pipe

[0022] 9- User side water supply port 10- First control valve

[0023] 11-Bypass pipe 12-Second control valve

[0024] 13-User side circulating water pump 14-Water quality processor

[0025] 15-Constant pressure water supply system 16-First temperature sensor

[0026] 17-Electromagnetic flow meter 18-Second temperature sensor

[0027] 19-First flow sensor 20-Third temperature sensor

[0028] 21- Second flow sensor 22- Central control system DETAILED DESCRIPTION

[0029] The present invention is described below based on the embodiments shown in the accompanying drawings. The embodiments disclosed this time can be considered to be illustrative in all aspects and not restrictive. The scope of the present invention is not limited by the description of the following embodiments, but is only shown by the scope of the claims, and includes all variations with the same meaning as the scope of the claims and within the scope of the claims.

[0030] The structure of a multifunctional regulating air source heat pump system of the utility model is explained below in conjunction with specific embodiments.

[0031] like Figure 1 The schematic diagram of the structure of an embodiment of a multifunctional regulating air source heat pump system is shown, which includes a plurality of heat pump unit units, and the heat pump unit units include a primary group 1 and a secondary group 2. The primary group 1 includes a plurality of primary heat pump units 3, and the secondary group 2 includes a plurality of secondary heat pump units 4. The primary heat pump unit 3 and the secondary heat pump unit 4 can be equipment of the same brand, specification and model, or equipment of different brands, specifications and models.

[0032] The primary heat pump unit 3 and the secondary heat pump unit 4 both include a shell, the inner cavity of which is provided with components such as an evaporator, a condenser, and a compressor, a refrigerant circulation pipe is provided between the evaporator and the condenser, and a four-way conversion valve is provided, which can freely convert the evaporator and the condenser. Under the heating (cooling) working condition, the condenser (evaporator) inlet of the primary heat pump unit 3 is connected to the user-side return water port 6 through the water inlet pipe 5, the condenser (evaporator) outlet of the primary heat pump unit 3 is connected to the condenser (evaporator) inlet of the secondary heat pump unit 4 through the first water outlet pipe 7, and the condenser (evaporator) outlet of the secondary heat pump unit 4 is connected to the user-side water supply port 9 through the second water outlet pipe 8. The inlet and outlet of each condenser (evaporator) in this embodiment are respectively connected to the corresponding water inlet pipe 5, the first water outlet pipe 7 and the second water outlet pipe 8 through a flexible joint. The user-side return water port 6 and the user-side water supply port 9 are used to connect with the refrigeration equipment or heating equipment at the user end. The refrigeration equipment may be fan coil units, radiant air conditioning terminals, fresh air units, full air units, etc.; the heating equipment may be radiators, floor heating, fan coil units, radiant air conditioning terminals, etc.

[0033] The second water outlet pipe 8 is provided with a first control valve 10 controlled by a central control system 22. A bypass pipe 11 is connected between the first water outlet pipe 7 and the second water outlet pipe 8, and a second control valve 12 controlled by the central control system 22 is provided on the bypass pipe 11. The central control system 22 has the functions of monitoring the data of each device and each sensor in the heat pump system, data recording, data analysis, reasonably matching the system operation strategy through energy-saving control calculation, calculating the energy efficiency and energy consumption of the system and main equipment, and notifying system failures.

[0034] The user-side water return port 6 is equipped with a user-side circulating water pump 13, a water quality processor 14 and a constant pressure water supply system 15. The main function of the water quality processor 14 is to deal with the four major problems of corrosion, scaling, algae and water quality deterioration that are common in various circulating water systems. The heat pump system replaces the defect that the traditional treatment of the above problems requires multiple devices to complete, and has the functions of comprehensive optimization of water quality, anti-scaling, anti-corrosion, sterilization, sterilization and ultra-clean filtration.

[0035] A first temperature sensor 16 and an electromagnetic flow meter 17 are also installed at the user-side water return port 6 . The first temperature sensor 16 and the electromagnetic flow meter 17 are connected to the central control system 22 via signal lines for monitoring the temperature and flow at the user-side water return port 6 .

[0036] A second temperature sensor 18 and a first flow sensor 19 are installed on the first water outlet pipe 7 . The second temperature sensor 18 and the first flow sensor 19 are connected to the central control system 22 via signal lines for monitoring the temperature and flow on the first water outlet pipe 7 .

[0037] A third temperature sensor 20 and a second flow sensor 21 are installed on the second water outlet pipe 8 . The third temperature sensor 20 and the second flow sensor 21 are connected to the central control system 22 via signal lines for monitoring the temperature and flow on the second water outlet pipe 8 .

[0038] When a large temperature difference and low flow state is required, the heat pump system of the utility model adopts a refrigeration mode, which can adopt a series large temperature difference operation system mode, in which the central control system 22 controls each first control valve 10 to open, each second control valve 12 to close, so that the corresponding water inlet pipe 5, the first water outlet pipe 7 and the second water outlet pipe 8 are connected to the air source heat pump unit module formed by the primary machine group 1 and the secondary machine group 2 to operate in a refrigeration / operation state. In this embodiment, the refrigeration equipment connected to the heat pump system adopts the fan coil terminal.

[0039] By monitoring the measured values ​​of the first temperature sensor 16 and the electromagnetic flowmeter 17 on the user-side return water port 6, the third temperature sensor 20 and the second flow sensor 21 on the second water outlet pipe 8, the terminal air conditioning refrigeration load demand is judged. The greater the cooling capacity required by the air conditioning terminal, the more heat pump units of the heat pump system of the utility model are opened. In each heat pump unit, the terminal air conditioning return water enters the primary group 1 through the water inlet pipe 5 to achieve primary cooling, and then enters the secondary group 2 through the first water outlet pipe 7 and the intermediate pipeline to achieve secondary cooling, and finally is transported to the user terminal through the second water outlet pipe 8, realizing the system's large temperature difference (about 10°C temperature difference) and low flow operation, which saves the energy consumption of the transmission and distribution equipment in the heat pump system and improves the system energy efficiency. The conventional air source heat pump system only has single-stage cooling, and the temperature difference between the user-side return water port 6 and the user-side water supply port 9 is about 5°C. The same cooling capacity requires a larger water flow, and the water pump configuration is larger, and the energy consumption is higher.

[0040] When the terminal air conditioning load is reduced, the parameters measured by the temperature sensors and flow sensors in the system can be fed back to the central control system 22 to shut down some heat pump units, which can still achieve the system operating conditions of large temperature difference and low flow.

[0041] The refrigeration condition of the heat pump system of the utility model can also adopt a single-stage parallel operation system mode. The central control system 22 controls each second control valve 12 to open, closes each first control valve 10, and uses the bypass pipe 11 to bypass the secondary machine group 2 of each heat pump unit. At this time, the secondary machine group 2 does not work. The air source heat pump unit refrigeration module formed by the primary machine group 1 in the corresponding connecting pipeline is operated. In each heat pump unit, the terminal air conditioning return water first enters the primary machine group 1 through the water inlet pipe 5 to achieve cooling, and is transported to the user terminal through the user side water supply port to achieve the refrigeration operation condition of the system. Its working mode is the same as that of the conventional air source heat pump system.

[0042] This single-stage parallel operation system mode is suitable for partial load conditions. When the air-conditioning system load demand is low, the temperature difference between the user-side return water inlet 6 and the user-side water supply inlet 9 cannot be widened by the water pump variable frequency low flow rate. In order to avoid excessive opening of the host and energy waste, this working condition can achieve system requirements by controlling the number of running units of the first-level group. In the low-load state, the energy efficiency of the system is improved as much as possible.

[0043] The utility model heat pump system can also adopt the heating condition - series large temperature difference operation system mode. This operation mode is basically the same as the cooling mode using the series large temperature difference operation system mentioned above, and the similarities are not repeated here. The difference is: first, the central control system 22 is used to control each first control valve 10 to open, and each second control valve 12 to close, so that the corresponding water inlet pipe 5, the first water outlet pipe 7 and the second water outlet pipe 8 are connected to the primary group 1 and the secondary group 2 to form the air source heat pump unit module heating condition operation.

[0044] The heating condition of the heat pump system of the utility model can also adopt a single-stage parallel operation system mode. This operation mode is basically the same as the above-mentioned parallel operation system cooling mode, and the similarities are not repeated. The difference is that the central control system 22 controls each second control valve 12 to open and each first control valve 10 to close, so that the air source heat pump unit heating module formed by the first-stage group 1 in the corresponding connecting pipeline operates, and its working mode is the same as the heating working mode of the conventional air source heat pump system.

[0045] The utility model discloses a multifunctional regulating air source heat pump system which can flexibly and accurately control the series and parallel connection between the primary heat pump unit 3 and the secondary heat pump unit 4, and can realize the capacity increase and reduction between the heat pump unit units at the same time. The system operation modes are diverse and flexible, which can improve the system energy efficiency under various operating conditions and realize energy saving and emission reduction.

[0046] The above-described embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope of the claims of the present invention.

Claims

1. A multifunctional regulating air source heat pump system, comprising a plurality of heat pump units, characterized in that: The heat pump unit includes a primary group and a secondary group. The primary group includes multiple primary heat pump units, and the secondary group includes multiple secondary heat pump units. The inlet of the primary heat pump unit is connected to the return water port on the user side through a water inlet pipe, and the outlet of the primary heat pump unit is connected to the inlet of the secondary heat pump unit through a first water outlet pipe. The outlet of the secondary heat pump unit is connected to the water supply port on the user side through a second water outlet pipe. The second water outlet pipe is equipped with a first control valve controlled by a central control system.

2. A multifunctional regulating air source heat pump system as claimed in claim 1, characterized in that: A bypass pipe is connected between the first water outlet pipe and the second water outlet pipe, and a second control valve controlled by the central control system is installed on the bypass pipe.

3. A multifunctional regulating air source heat pump system as claimed in claim 1, characterized in that: A user-side circulating water pump is installed on the user-side water return port.

4. A multifunctional regulating air source heat pump system as claimed in claim 1, characterized in that: A water quality processor is installed on the user-side water return port.

5. The multifunctional regulating air source heat pump system according to claim 1, characterized in that: A constant pressure water replenishment system is installed on the user-side water return port.

6. A multifunctional regulating air source heat pump system as claimed in claim 1, characterized in that: A first temperature sensor and an electromagnetic flow meter are installed on the user-side water return port, and both the first temperature sensor and the electromagnetic flow meter are connected to the central control system via a signal line.

7. The multifunctional regulating air source heat pump system according to claim 1, characterized in that: A second temperature sensor and a first flow sensor are installed on the first water outlet pipe, and the second temperature sensor and the first flow sensor are both connected to the central control system via a signal line.

8. The multifunctional regulating air source heat pump system according to claim 1, characterized in that: A third temperature sensor and a second flow sensor are installed on the second water outlet pipe, and both the third temperature sensor and the second flow sensor are connected to the central control system via a signal line.

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