Water source heat pump energy supply system

Abstract

The utility model discloses a water source heat pump energy supply system which comprises a water source heat pump main machine, a heat source water pipeline is arranged on the water source heat pump main machine, and the system is connected with a sewage source through the heat source water pipeline. A filtering device and a water volume adjusting device are sequentially connected between the heat source water pipeline and the sewage source in series, the water volume adjusting device comprises a first water tank and a second water tank, the first water tank is a fixed water tank, the front end of the first water tank is connected with a water inlet, and the second water tank is assembled on a movable support. The first water tank can move up and down relative to the first water tank through the movable bracket; and the bottom of the other side, opposite to the water inlet, of the first water tank is communicated with the second water tank through a communicating pipe, so that the second water tank can adjust the water storage amount in the water amount adjusting device according to the communicating vessel principle through the action of moving up and down. The device has the advantages of high efficiency, energy conservation, stable and reliable operation, remarkable environmental benefit, good operation effect, remarkable economic benefit and easiness in popularization.

Description

Technical Field

[0001] The utility model relates to a water source heat pump technology in the field of energy storage and application, in particular to a water source heat pump energy supply system. Background Art

[0002] A water source heat pump is a highly efficient heat utilization system that uses water sources on the earth's surface or shallow layers (such as groundwater, rivers and lakes), or artificially recycled water sources (such as industrial wastewater, geothermal tail water, etc.) for both heating and cooling. Its working principle is to transfer heat from buildings to water sources in summer to achieve cooling; in winter, it extracts energy from relatively stable and warm water sources, uses the heat pump principle to raise the temperature through air or water as a coolant, and then sends it to the building to achieve heating. It has the advantages of low operating cost, high efficiency, stability and reliability, multi-purpose machine, and a wide range of applications.

[0003] Compared with the technical and environmental obstacles caused by the available water sources and the geographical structure of the water layers in natural water body heat sources, the application restrictions of sewage sources are lower, and they have better application prospects in cities and urban-rural fringe areas. However, due to the volatility and discontinuity of urban raw sewage, and the large particles may easily block the pipes, the sewage source heat pump is prone to cause changes in the flow rate and flow of sewage through the heat exchanger when used, affecting the normal operation of the heat pump, resulting in temperature changes in the energy supply water, and a decrease in comfort. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a water source heat pump energy supply system to solve the shortcomings of the above-mentioned background technology.

[0005] The technical problem solved by the utility model is achieved by the following technical solutions:

[0006] A water source heat pump energy supply system, comprising a water source heat pump main unit, the water source heat pump main unit is provided with a heat source water pipeline, and the system is connected to a sewage water source through the heat source water pipeline;

[0007] A filtering device and a water volume regulating device are also connected in series between the heat source water pipeline and the sewage water source. The water volume regulating device includes a first water tank and a second water tank. The first water tank is a fixed water tank whose front end is connected to the water inlet. The second water tank is assembled on a movable bracket and can be moved up and down relative to the first water tank through the movable bracket. The first water tank is connected to the second water tank through a connecting pipe at the bottom of the other side opposite to the water inlet, so that the second water tank can adjust the water storage capacity in the water volume regulating device by moving up and down according to the principle of a communicating vessel.

[0008] As a further limitation, the water source heat pump host includes a refrigerant circulation loop and a condenser, an evaporator, a compressor, a refrigerant storage tank and an expansion valve connected in series in the refrigerant circulation loop; the heat source water pipeline is connected to the low-temperature heat source end of the evaporator;

[0009] The discharge end of the refrigerant medium storage tank is provided with a plurality of parallel discharge pipelines, and each parallel discharge pipeline is provided with a filter and an expansion valve;

[0010] The condenser end is also provided with an electric heater as an auxiliary heating device.

[0011] As a further limitation, the sewage source is a sewage well that receives urban raw sewage, and a combined grille for blocking large-sized debris is arranged in the sewage well along the height direction.

[0012] As a further limitation, the filtering device is a filtering water tank, including a water tank body, the water tank body is a heat-insulating body, the body is provided with a water inlet and a water outlet at the upper part of both ends, and a combined filtering device is provided in the body;

[0013] The combined filtering device comprises a plurality of filter frames arranged along the length direction of the filtering water tank, the filter frames are filled with filter materials of different particle sizes, the rear of the filter frames is provided with a side baffle with an overflow structure, and a buffer space is reserved between the rear of the side baffle and the side wall of the water tank body where the water outlet is arranged;

[0014] The filter frame is a detachable structure;

[0015] The setting plane of the water inlet is located below the corresponding plane of the top surface of the filter frame; the corresponding plane of the top surface of the side block is located below the corresponding plane of the top surface of the filter frame; the setting plane of the water outlet is located below the corresponding plane of the top surface of the side block.

[0016] As a further limitation, the first water tank and the second water tank of the water volume regulating device are encapsulated in an outer shell, and the inner side of the outer shell is lined with a heat-insulating material.

[0017] As a further limitation, the water outlet end of the water volume regulating device is also connected to a buffer water tank.

[0018] Beneficial effects: The water source heat pump energy supply system of the utility model has better adaptability to the sewage water body and sewage production cycle of urban sewage. It has better filtering and treating effect on sewage and high heat recovery efficiency. Compared with traditional sewage source water pumps, its heat utilization efficiency is higher, and the fluctuation range in the heat utilization process is small, more reliable and stable, and compared with natural water and groundwater heat sources, it is more environmentally friendly and has the advantages of low initial investment and low operating costs. These advantages make the sewage source heat pump have broad application prospects in the fields of air conditioning and heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a preferred embodiment of the utility model.

[0020] Among them: 1. Sewage well; 2. Water source heat pump main unit; 3. Filter device; 4. Water volume regulating device; 5. Buffer water tank; 6. Evaporator; 7. Compressor; 8. Condenser; 9. Refrigerant medium storage tank; 10. Refrigerant medium filter; 11. Expansion valve; 12. First water tank; 13. Second water tank; 14. Movable bracket; 15. Filter rack; 16. Side stop. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0022] See also Figure 1 A preferred embodiment of a water source heat pump energy supply system. In this embodiment, the water source heat pump energy supply system includes a heat source water pipeline, which is a closed-loop water circulation pipeline. The pipeline includes a sewage well 1, a water source heat pump main unit 2, a filtering device 3, a water volume regulating device 4 and a buffer water tank 5 connected in sequence.

[0023] The sewage well 1 is used as the water source of the sewage source heat pump, and is mainly used to receive urban primary domestic sewage within a specified range. A combined grid is arranged in the sewage well 1, and the combined grid includes four groups of grid units arranged from top to bottom. The grid grids in the four groups of grid units are connected from top to bottom with decreasing connections. The combined grid can be used to intercept and remove larger suspended matter and floating matter in sewage, such as coarse floating matter and suspended matter. This can prevent these substances from clogging and entanglement with water pump units, aerators, valves and other equipment, ensure the normal operation of the facility, and reduce the scum generated by subsequent treatment. These grids in this embodiment are made of stainless steel, and have the advantages of corrosion resistance, easy management, few failures, and low maintenance rate.

[0024] After the sewage treated by the combined grid accumulates to a certain amount in the sewage well 1, it is sent to the filter device 3 through the valve and the pump body. The main body of the filter device 3 is a closed water tank body structure. A water inlet is arranged on the upper right side of the water tank body. The heat source sewage in the sewage well 1 is discharged into the filter device 3 through the water inlet for secondary filtration treatment. The structure for the secondary filtration treatment is three filter frames 15 arranged in sequence. The filter frame 15 is a detachable plug-in structure for easy maintenance. It is fixed in the water tank body of the filter device 3 by plug-in. The two sides and the bottom of the filter frame 15 are against the wall of the water tank body. The filter frame 15 is filled with filter filler. The sewage entering the filter device 3 can be filtered three times in sequence through the three groups of filter frames 15 to further reduce the impact on subsequent equipment.

[0025] The filter device 3 is further provided with a side baffle 16 on the left side of the three groups of filter frames 15. The setting height of the side baffle 16 is lower than the filter frame 15 to ensure that the sewage will not pass over the upper part of the filter frame 15. An overflow port is reserved on the top surface of the side baffle 16. The filtered sewage slowly flows into the buffer space between the side baffle 16 and the left box wall of the filter device 3 through the overflow port, and after accumulating to a certain liquid level height in the buffer space, it flows into the water volume regulating device 4 from the water outlet set at the liquid level height position.

[0026] The water volume regulating device 4 comprises a first water tank 12 and a second water tank 13. The first water tank 12 and the second water tank 13 are enclosed in an outer shell with a larger size, and the inner side of the outer shell is lined with a heat-insulating material. In this embodiment, after the entire water volume regulating device 4 is assembled in place, the position of the first water tank 12 in the outer shell is fixed, and a movable bracket 14 is provided on the left side of the first water tank 12, and the movable bracket 14 is equipped with the second water tank 13. The second water tank 13 can be moved up and down relative to the first water tank 12 through the movable bracket 14. The bottom of the first water tank 12 is connected with the bottom of the second water tank 13 through a connecting pipe to form a communicating vessel. The communicating vessel structure of the water volume regulating device 4 can make the first water tank 12 and the second water tank 13 have a maximum water storage capacity when they are in the same horizontal position. The maximum water storage capacity is the sum of the volumes of the first water tank 12 and the second water tank 13. When the second water tank 13 is below the plane of the first water tank 12, the minimum water storage capacity is the volume of the second water tank 13; and the movement of the second water tank 13 at different horizontal positions can make the volume of the water volume regulating device 4 continuously change between the maximum water storage capacity and the minimum water storage capacity to adapt to the changes in the sewage production and the actual application requirements of the system.

[0027] The water volume regulating device 4 is connected to a buffer water tank 5 at the rear thereof, and is connected to the water source heat pump host 2 as a working element at the rear thereof. When the water source heat pump host 2 is not started, the water volume regulating device 4 and the buffer water tank 5 can be used as temporary storage containers for sewage of low-heat heat source.

[0028] When the water source heat pump main unit 2 is started, the compressor 7 works to drive the refrigerant in the refrigerant storage tank 9 to flow in the refrigerant circulation loop in the water source heat pump main unit 2. During this period, the discharge end of the refrigerant storage tank 9 is provided with multiple parallel discharge pipelines, and each parallel discharge pipeline is provided with a refrigerant filter 10 and an expansion valve 11 to ensure the supply efficiency of the refrigerant. At the same time, the sewage in the water volume regulating device 4 and the buffer water tank 5 is pumped into the evaporator 6, and the evaporator 6 is used to absorb the heat energy in the sewage as a low-temperature heat source and convert it into high-level heat energy, and then the condenser 8 is used to release heat and utilize heat energy, which can be used to meet the needs of heating and hot water supply. The sewage after heat conversion by the evaporator 6 continues to flow back to the sewage well 3.

[0029] In another embodiment, an electric heater is further provided at the end of the condenser 8 as an auxiliary heating device for performing auxiliary heating when the heating effect of the condenser 8 is insufficient, thereby ensuring the heat utilization effect.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A water source heat pump energy supply system, characterized in that: It includes a water source heat pump host, on which a heat source water pipeline is provided, and the system is connected to a sewage water source through the heat source water pipeline; A filtering device and a water volume regulating device are also connected in series between the heat source water pipeline and the sewage water source. The water volume regulating device includes a first water tank and a second water tank. The first water tank is a fixed water tank whose front end is connected to the water inlet. The second water tank is assembled on a movable bracket and can be moved up and down relative to the first water tank through the movable bracket. The first water tank is connected to the second water tank through a connecting pipe at the bottom of the other side opposite to the water inlet, so that the second water tank can adjust the water storage capacity in the water volume regulating device by moving up and down according to the principle of a communicating vessel.

2. The water source heat pump energy supply system according to claim 1, characterized in that: The water source heat pump host includes a refrigerant circulation loop and a condenser, an evaporator, a compressor, a refrigerant storage tank and an expansion valve connected in series in the refrigerant circulation loop; the heat source water pipeline is connected to the low-temperature heat source end of the evaporator.

3. The water source heat pump energy supply system according to claim 2, characterized in that: The discharge end of the refrigerant medium storage tank is provided with a plurality of parallel discharge pipelines, and each of the parallel discharge pipelines is provided with a filter and an expansion valve.

4. The water source heat pump energy supply system according to claim 2, characterized in that: The condenser end is also provided with an electric heater as an auxiliary heating device.

5. The water source heat pump energy supply system according to claim 1, characterized in that: The sewage source is a sewage well that receives urban primary sewage, and a combined grid for blocking large-sized debris is arranged in the sewage well along the height direction.

6. The water source heat pump energy supply system according to claim 1, characterized in that: The filtering device is a filtering water tank, comprising a water tank body, wherein the water tank body is a heat-insulating body, and a water inlet and a water outlet are respectively arranged at the upper parts of both ends of the body, and a combined filtering device is arranged in the body.

7. The water source heat pump energy supply system according to claim 6, characterized in that: The combined filtering device includes a plurality of detachable filter frames arranged along the length direction of the filtered water tank, the filter frames are filled with filter materials of different particle sizes, the rear of the filter frames are provided with side baffles with overflow structures, and a buffer space is reserved between the rear of the side baffles and the side wall of the water tank body where the water outlet is arranged.

8. The water source heat pump energy supply system according to claim 7, characterized in that: The setting plane of the water inlet is located below the corresponding plane of the top surface of the filter frame; the corresponding plane of the top surface of the side block is located below the corresponding plane of the top surface of the filter frame; the setting plane of the water outlet is located below the corresponding plane of the top surface of the side block.

9. The water source heat pump energy supply system according to claim 1, characterized in that: The first water tank and the second water tank of the water volume regulating device are encapsulated in an outer shell, and the inner side of the outer shell is lined with a heat-insulating material.

10. The water source heat pump energy supply system according to claim 1, characterized in that: The water outlet end of the water volume regulating device is also connected to a buffer water tank.

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