阅读说明：本技术 一种地源热泵节能系统 (Ground source heat pump economizer system ) 是由 李海军 于 2020-07-03 设计创作，主要内容包括：本发明涉及地源热泵技术领域,公开了一种地源热泵节能系统,包括第一膨胀罐,其出水口连接有N次供回水循环系统；N次供回水循环系统分为并联的第1供回水循环系统、第2供回水循环系统、……、第N供回水循环系统；第N供回水循环系统均包括地源热泵主机,及连接其上的出水管、回水管。应用本发明的技术方案,设有N次供回水循环系统,起到多次往复循环,多次交换地热,充分利用地热资源,节能环保效果更佳。PLC控制器获取并分析空调电磁阀及地暖热电阀的电磁信号,根据风机盘管装置或地暖分集水器装置的实际运行情况,来决定启动地源热泵主机和运行功率并加以控制,从而有效调整或控制整个地源热泵节能系统的运行情况,达到系统优化及节能的效果。(The invention relates to the technical field of ground source heat pumps, and discloses a ground source heat pump energy-saving system which comprises a first expansion tank, wherein a water outlet of the first expansion tank is connected with a water supply and return circulating system for N times; the N times of water supply and return circulation systems are divided into a 1 st water supply and return circulation system, a 2 nd water supply and return circulation system, … … and an Nth water supply and return circulation system which are connected in parallel; the Nth water supply and return circulating system comprises a ground source heat pump host, and a water outlet pipe and a water return pipe which are connected with the ground source heat pump host. By applying the technical scheme of the invention, the N times of water supply and return circulation systems are arranged, so that repeated reciprocating circulation and repeated geothermal heat exchange are realized, geothermal resources are fully utilized, and the effects of energy conservation and environmental protection are better. The PLC acquires and analyzes electromagnetic signals of the air conditioner electromagnetic valve and the floor heating thermoelectric valve, and determines to start the ground source heat pump host and control the running power according to the actual running condition of the fan coil device or the floor heating water distribution and collection device, so that the running condition of the whole ground source heat pump energy-saving system is effectively adjusted or controlled, and the effects of system optimization and energy conservation are achieved.)

1. The energy-saving system of the ground source heat pump is characterized by comprising a first expansion tank, wherein a water outlet of the first expansion tank is connected with an outdoor N-time water supply and return circulation system, wherein N is an integer greater than 1; the N times of water supply and return circulation systems are divided into a 1 st water supply and return circulation system, a 2 nd water supply and return circulation system, … … and an Nth water supply and return circulation system which are connected in parallel; the 1 st water supply and return circulation system, the 2 nd water supply and return circulation system, the … … th water supply and return circulation system and the Nth water supply and return circulation system respectively comprise a ground source heat pump host, the ground source heat pump host is connected with a water outlet pipe and one end of a water return pipe, the other end of the water outlet pipe is connected with an underground heat exchanger which exchanges heat with geothermal heat, and the underground heat exchanger is connected with the other end of the water return pipe and returns water to the ground source heat pump host; and the ground source heat pump host is connected with an indoor air conditioning system and/or a floor heating system.

2. The ground source heat pump energy saving system of claim 1, wherein a ground source heat pump host control panel is arranged on the ground source heat pump host, an air conditioning system control panel is arranged on the air conditioning system, and a floor heating system control panel is arranged on the floor heating system; the ground source heat pump system further comprises a PLC, and the PLC is in communication connection with the ground source heat pump host control panel, the air conditioning system control panel and the floor heating system control panel.

3. The ground source heat pump energy saving system of claim 2, wherein the air conditioning system comprises a coupling water tank and a fan coil device, the coupling water tank is connected with the ground source heat pump host through a first circulation pipeline; and the coupling water tank is also connected with a second circulating pipeline, the second circulating pipeline is connected with a fan coil device, and the fan coil device exchanges heat indoors and then is connected to the coupling water tank through a second circulating pipeline loop.

4. The ground source heat pump energy saving system of claim 3, wherein the ground heating system comprises a ground heating water collecting and collecting device connected to the second circulation pipeline, and the ground heating water collecting and collecting device exchanges heat indoors and then is connected to the coupling water tank through the second circulation pipeline loop.

5. The ground source heat pump energy saving system of claim 4, wherein the number of the fan coil unit and the number of the ground heating water collecting and distributing device are both multiple and are connected in parallel.

6. The ground source heat pump energy saving system of claim 5, wherein a solenoid valve is connected to a second circulation pipeline between each of the fan coil unit, the floor heating water collection and diversion device and the coupling water tank, and the solenoid valves are in communication connection with the PLC controller.

7. The ground source heat pump energy saving system of any one of claims 3 to 6, wherein a second expansion tank is provided on the second circulation pipeline, a water outlet of the second expansion tank is communicated with the second circulation pipeline, a second circulation pump is further connected to the second circulation pipeline, a second circulation pump control panel is provided on the second circulation pump, and the second circulation pump control panel is in communication connection with the PLC controller.

8. The ground source heat pump energy saving system of claim 1, wherein the number of the first expansion tank is N corresponding to N water supply and return circulation systems, and the water outlet thereof is communicated with a water outlet pipe.

9. The ground source heat pump energy saving system of claim 1, wherein a water supply pump is connected to the water outlet pipe.

10. The ground source heat pump energy saving system of claim 1, wherein the underground heat exchanger is a buried pipe, and the buried pipe is a horizontal buried pipe and/or a vertical buried pipe.

Technical Field

The invention relates to the technical field of ground source heat pumps, in particular to an energy-saving system of a ground source heat pump.

Background

The ground source heat pump system is a high-efficiency energy-saving device which can supply heat and refrigerate by utilizing underground shallow geothermal resources (including underground water, underground rock soil or surface water and the like). In which the ground source heat pump system is less limited by environmental conditions and is therefore increasingly gaining attention. The characteristic that the temperature of underground soil is relatively stable is utilized, and on the basis of inputting a small amount of high potential energy, the heat exchanger of the buried pipe buried underground is used for exchanging heat with the ground to realize refrigeration in summer and heating in winter; in addition, domestic hot water can be provided. In the annual operation process of a ground source heat pump system, heat is absorbed from the ground through a heat pump host machine in winter and then heat is supplied to a building, and meanwhile, the temperature around the ground heat exchanger is reduced; in summer, the heat in the building is transmitted to the ground through the heat pump, the building is cooled, and meanwhile, the temperature around the ground heat exchanger is increased.

In the prior art, when a ground source heat pump system is in operation, cold and hot energy sources are not fully utilized, and the cold and hot energy sources are excessively lost, so that the energy-saving and environment-friendly effects are poor.

Disclosure of Invention

The invention aims to provide an energy-saving system of a ground source heat pump, which aims to solve the technical problems in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a ground source heat pump energy saving system, including a first expansion tank, a water outlet of which is connected with an outdoor N times water supply and return circulation system, where N is an integer greater than 1; the N times of water supply and return circulation systems are divided into a 1 st water supply and return circulation system, a 2 nd water supply and return circulation system, … … and an Nth water supply and return circulation system which are connected in parallel; the 1 st water supply and return circulation system, the 2 nd water supply and return circulation system, the … … th water supply and return circulation system and the Nth water supply and return circulation system respectively comprise a ground source heat pump host, the ground source heat pump host is connected with a water outlet pipe and one end of a water return pipe, the other end of the water outlet pipe is connected with an underground heat exchanger which exchanges heat with geothermal heat, and the underground heat exchanger is connected with the other end of the water return pipe and returns water to the ground source heat pump host; and the ground source heat pump host is connected with an indoor air conditioning system and/or a floor heating system.

Further, a ground source heat pump host control panel is arranged on the ground source heat pump host, an air conditioning system control panel is arranged on the air conditioning system, and a floor heating system control panel is arranged on the floor heating system; the ground source heat pump system further comprises a PLC, and the PLC is in communication connection with the ground source heat pump host control panel, the air conditioning system control panel and the floor heating system control panel.

Further, the air conditioning system comprises a coupling water tank and a fan coil device, wherein the coupling water tank is connected with the ground source heat pump host through a first circulating pipeline; and the coupling water tank is also connected with a second circulating pipeline, the second circulating pipeline is connected with a fan coil device, and the fan coil device exchanges heat indoors and then is connected to the coupling water tank through a second circulating pipeline loop.

Furthermore, the floor heating system comprises a floor heating water distribution and collection device connected to the second circulation pipeline, and the floor heating water distribution and collection device is connected to the coupling water tank through the second circulation pipeline loop after indoor heat exchange.

Furthermore, the fan coil device and the floor heating water collecting and distributing device are provided with a plurality of devices which are connected in parallel.

Furthermore, a second circulating pipeline between each fan coil device, the floor heating water collecting and distributing device and the coupling water tank is connected with an electromagnetic valve, and the electromagnetic valves are in communication connection with the PLC.

Furthermore, a second expansion tank is arranged on the second circulation pipeline, a water outlet of the second expansion tank is communicated with the second circulation pipeline, a second circulation pump is further connected onto the second circulation pipeline, a second circulation pump control panel is arranged on the second circulation pump, and the second circulation pump control panel is in communication connection with the PLC.

Furthermore, the number of the first expansion tank is N corresponding to the N times of water supply and return circulation systems, and water outlets of the first expansion tank are communicated with a water outlet pipe.

Furthermore, a water supply pump is connected to the water outlet pipe.

Further, the underground heat exchanger is a ground buried pipe, and the ground buried pipe is a horizontal buried pipe and/or a vertical buried pipe.

By applying the technical scheme of the invention, the ground source heat pump host exchanges heat with geothermal resources through the underground heat exchanger, so that the heat utilization rate is improved. N times of water supply and return circulating systems are arranged between the ground source heat pump host and the underground heat exchanger, so that repeated reciprocating circulation is realized, geothermal heat is exchanged for multiple times, geothermal resources are fully utilized, the heat utilization rate is greatly improved, and the energy-saving and environment-friendly effects are better.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

reference numerals:

the system comprises a fan coil device 1, a floor heating water distribution and collection device 2, a second circulating pump 3, a coupling water tank 4, a ground source heat pump host 5, a first expansion tank 6, a PLC (programmable logic controller) 7, a floor heating control signal line 8, an air conditioner control signal line 9, a ground source heat pump host control signal line 10, a primary circulating pump 11, an automatic exhaust valve 12, a vertical buried pipe 13, a second expansion tank 14, an air conditioner electromagnetic valve 15, a floor heating thermoelectric valve 16, a water supply pump 17, a 1 st water supply and return circulation system 18, a 2 nd water supply and return circulation system 19, a first circulation pipeline 20 and a second circulation pipeline 21.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; of course, mechanical connection and electrical connection are also possible; alternatively, they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

As shown in fig. 1, the invention provides a ground source heat pump energy-saving system, which comprises a first expansion tank 6, wherein a water outlet of the first expansion tank is connected with an outdoor N-time water supply and return circulation system, wherein N is an integer greater than 1; the N times of water supply and return circulation systems are divided into a 1 st water supply and return circulation system, a 2 nd water supply and return circulation system, … … and an Nth water supply and return circulation system which are connected in parallel; the 1 st water supply and return circulation system, the 2 nd water supply and return circulation system, the … … th water supply and return circulation system and the N th water supply and return circulation system respectively comprise a ground source heat pump host 5, a water outlet pipe and a water return pipe which are connected with the ground source heat pump host 5, wherein one end of the water outlet pipe and one end of the water return pipe are connected with the ground source heat pump host 5, the other end of the water outlet pipe is connected with an underground heat exchanger which exchanges heat with geothermal heat, and the underground heat exchanger is connected with the other end of the water return pipe and returns water to the ground source heat pump host 5; and the ground source heat pump host 5 is connected with an indoor air conditioning system and/or a floor heating system.

The N times of water supply and return circulation systems can be set as 2 times of water supply and return circulation systems and are divided into a 1 st water supply and return circulation system 18 and a 2 nd water supply and return circulation system 19 which are connected in parallel. The 1 st water supply and return circulation system 18 and the 2 nd water supply and return circulation system 19 can work simultaneously, and the water supply and return circulation is realized, so that the heat utilization rate is improved. The first expansion tank 6 is used for supplementing water for pipelines of the No. 1 water supply and return circulation system and the No. 2 water supply and return circulation system.

In one of the water supply and return circulating systems, the ground source heat pump host 5 is provided with an outdoor water outlet, an outdoor water return port, an indoor water outlet and an indoor water return port. The outdoor water outlet is connected with the water outlet pipe, the outdoor water return port is connected with the water return pipe, and the outlet water is subjected to heat exchange by the underground heat exchanger and then returns to the ground source heat pump host 5 to form circulation; the water discharged from the water outlet at the indoor side is drained to the coupling water tank 4 by the first circulating pipeline 20 for energy storage, and then is returned by the first circulating pipeline 20 and enters the ground source heat pump host 5 through the water return port at the indoor side.

The ground source heat pump host 5 is provided with a ground source heat pump host control panel, the air conditioning system is provided with an air conditioning system control panel, and the floor heating system is provided with a floor heating system control panel; the ground source heat pump air conditioner further comprises a PLC (programmable logic controller) 7, and the PLC 7 is in communication connection with the control panel of the ground source heat pump host machine, the control panel of the air conditioning system and the control panel of the floor heating system.

The PLC 7 is in communication connection with a ground source heat pump host control panel, an air conditioning system control panel and a floor heating system control panel to form a control system. The communication connection is a wired communication connection formed by a signal line connection. The signal lines are divided into a ground source heat pump host control signal line 10 (used for connecting a ground source heat pump host control panel with the PLC controller 7), an air conditioner control signal line 9 (used for connecting an air conditioner system control panel with the PLC controller 7), and a floor heating control signal line 8 (used for connecting the floor heating system control panel with the PLC controller 7). The PLC controller 7 is a Siemens brand product with the model number of S7-200CN (6ES 7216-2 BD23-OXB8) (made in China).

The air conditioning system comprises a coupling water tank 4 and a fan coil device 1, wherein the coupling water tank 4 is connected with a ground source heat pump host 5 through a first circulating pipeline 20; the coupling water tank 4 is also connected with a second circulating pipeline 21, the second circulating pipeline 21 is connected with a fan coil device 1, and the fan coil device 1 exchanges heat indoors and then returns to the coupling water tank 4 through the second circulating pipeline 21. The first circulation line 20 is provided with a primary circulation pump 11. The primary circulation pump 11 is used for coupling the water circulation of the water tank 4 to the ground source heat pump host 5. The primary circulation pump 11 is a Glan brand product with a model number of CM10-2 (made in China). Two sets of the first circulation line 20 are provided.

The floor heating system comprises a floor heating water collecting and collecting device 2 connected to a second circulating pipeline 21, and the floor heating water collecting and collecting device 2 exchanges heat indoors and then is connected to the coupling water tank 4 through a loop of the second circulating pipeline 21.

The coupling water tank 4 mainly has the function of storing energy, and the principle is that the ground source heat pump host 5 circulates water in the coupling water tank 4 into the ground source heat pump host 5 through the primary circulating pump 11 to heat or refrigerate through the underground heat exchanger. When the water temperature reaches the set temperature, the ground source heat pump host 5 stops running, the indoor side circulates the hot water or the cold water stored in the coupling water tank 4 to the indoor through the second circulating pump 3 on the second circulating pipeline 21 (at this time, the second circulating pump 3 is called as an indoor side variable frequency circulating pump), and the indoor environment is heated or cooled under the action of an air conditioning system or a floor heating system. The coupling water tank 4 can store energy in advance, plays a role in caching, can reduce the starting frequency of the ground source heat pump host 5, and reduces the fault occurrence rate of the ground source heat pump host 5. Meanwhile, the opening effect of the indoor air conditioning system and the indoor floor heating system is rapid. The coupling water tank 4 can be a product of double seasons, and the model is 300L (made in China).

The fan coil device 1 and the floor heating water collecting and distributing device 2 are both provided with a plurality of parallel connections. Can provide heating or cooling for a plurality of indoor places, and has wider applicability.

And each fan coil device 1, the floor heating water collecting and distributing device 2 and the coupling water tank 4 are connected with an electromagnetic valve on a second circulating pipeline 21, and the electromagnetic valves are in communication connection with the PLC 7.

The communication connection is a wired communication connection formed by the air conditioner control signal line 9 and the floor heating control signal line 8. The electromagnetic valve is used for controlling the on-off of a pipeline, is applied to an air conditioning system and is called as an air conditioning electromagnetic valve 15, and is made of a product of a Konikov brand, and the model is 7320 (made in China). The electromagnetic valve is applied to a floor heating system, is called as a floor heating thermoelectric valve 16, and is made of a Helmannich brand product, and the model of the Helmannich brand product is HZ120 (made in China).

Be equipped with second expansion tank 14 on the second circulation pipeline 21, the delivery port intercommunication second circulation pipeline 21 of second expansion tank 14 still is connected with second circulating pump 3 on the second circulation pipeline 21, is equipped with the control panel of second circulating pump on the second circulating pump 3, the control panel of second circulating pump and PLC controller 7 communication connection. Specifically, the air conditioner control signal line 9 or the floor heating control signal line 8 is referred to for wired communication connection. The second circulation pipeline 21 is also provided with an automatic exhaust valve 12 which is a safety device.

The second expansion tank 14 serves to replenish the second circulation line 21.

And the number of the first expansion tank 6 is N corresponding to the N times of water supply and return circulation systems, and the water outlet of the first expansion tank is communicated with the water outlet pipe.

In this embodiment, two first expansion tanks 6 are provided because the water supply and return circulation system is provided for 2 times. The water outlet pipe is connected with a water supply pump 17.

The first expansion tank 6 is used for supplementing water, and the water supply pump 17 provides water supply power.

The underground heat exchanger is a ground buried pipe, and the ground buried pipe is a horizontal buried pipe and/or a vertical buried pipe 13.

Horizontal pipe burying: a plurality of heat exchange tubes are placed in soil in a flat-laying mode to take heat. The construction method has the advantages that the construction is simple, the occupied area is large, the influence of external factors is large, and the construction method is suitable for being used in places with wide land areas.

Vertically burying the pipe: a plurality of heat exchange tubes are vertically buried in soil to take heat. The mode has small floor area, is hardly influenced by external factors, has very reliable use effect, has low maintenance cost after construction, and is very suitable for areas with dense population in China.

By adopting the technical scheme, the fan coil device 1 and the floor heating water collecting and collecting device 2 are controlled by the electromagnetic valves, and cold and hot water can circulate only in the running state of the fan coil device 1 and the floor heating water collecting and collecting device 2, so that energy waste caused by the circulation of the cold and hot water through a bypass pipeline of a traditional ground source heat pump energy-saving system when a user is not started is avoided, and the energy-saving and environment-friendly effects are achieved.

The local source heat pump energy-saving system utilizes the linkage of an indoor air-conditioning system or a floor heating system, and gives a one-to-one signal to the second circulating pump 3 through the PLC 7, so that the running power of the second circulating pump 3 is increased or reduced, and the water flow condition in the second circulating pipeline 21 is adjusted. Meanwhile, the PLC 7 acquires and analyzes electromagnetic signals of an air conditioning electromagnetic valve 15 of the air conditioning system and a floor heating thermoelectric valve 16 of the floor heating system, and determines to start the ground source heat pump host 5 and control the running power according to the actual running condition of the fan coil device 1 or the floor heating water distribution and collection device 2, so that the running condition of the whole ground source heat pump energy-saving system is effectively adjusted or controlled, and the effects of system optimization and energy conservation are achieved. In the above, the PLC controller 7 dynamically controls the ground source heat pump host 5 (for example, start-up on demand, control start-up power) so as not to cause frequent start-up of the ground source heat pump host 5, thereby avoiding the phenomena of accelerating aging of the ground source heat pump host 5, increasing failure probability, and causing excessive energy consumption.

Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and the patent scope of the present invention is not limited; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the invention.