CN113587492B - Ground source heat pump with redundant heat source selection and convenient maintenance - Google Patents
Ground source heat pump with redundant heat source selection and convenient maintenance Download PDFInfo
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- CN113587492B CN113587492B CN202110784022.1A CN202110784022A CN113587492B CN 113587492 B CN113587492 B CN 113587492B CN 202110784022 A CN202110784022 A CN 202110784022A CN 113587492 B CN113587492 B CN 113587492B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/002—Compression machines, plants or systems with reversible cycle not otherwise provided for geothermal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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Abstract
The invention discloses a ground source heat pump with redundant heat source selection and convenient maintenance, which comprises a four-way reversing valve, a heat pump compressor, a user side heat exchanger, a throttle valve, a data acquisition module and a ground source side heat exchanger with a heat source selection function, wherein the four-way reversing valve is connected with the heat pump compressor; the data acquisition module acquires operation data; the four-way reversing valve is connected with two ends of the heat pump compressor, the user side heat exchanger and the ground source side heat exchanger, and the ground source side heat exchanger is connected with the user side heat exchanger through the throttle valve; the ground source side heat exchanger is composed of a plurality of heat exchange modules, each heat exchange module comprises a branched inner pipe and an outer cavity wrapping the inner pipe, the branched inner pipes can be used for circulating a circulating medium, and the space between the outer cavities and the inner pipes can be used for heat source liquid to flow. The ground source side heat exchanger is improved to be capable of being connected with the main heat source and the standby heat source at the same time, so that the purpose of selecting and switching the heat sources is achieved, and meanwhile, due to the relative independence of the heat exchange modules, the ground source side heat exchanger can be isolated from the heat exchanger to be maintained and replaced, and the ground source side heat exchanger is more convenient.
Description
Technical Field
The invention relates to the field of ground source heat pumps, in particular to a ground source heat pump which has redundant heat source selection and is convenient to maintain.
Background
The cold and heat of the ground source heat pump system are obtained from a rock-soil layer with a constant temperature working condition, the energy efficiency ratio (COP) value of a unit is kept above 4, namely, 1kW of high-grade electric energy is consumed, so that about 4kW of cold or heat can be obtained, and the operation efficiency is extremely high; under the refrigeration working condition, compared with a common central air-conditioning system, the ground source heat pump air-conditioning system can save energy by 30-40 percent; under the heating working condition, compared with a gas boiler floor heating, the energy can be saved by 40% -50%, and the energy conservation and emission reduction are remarkable.
A ground source heat pump system disclosed in Chinese patent literature, with publication number CN112361658A and publication date 2021-02-12, comprises a heat exchange tube set, a first circulating pump, a ground source heat pump unit, a water heater, a coil and a second circulating pump, wherein the heat exchange tube set is buried in soil and connected with the first circulating pump through a first water tube, the first circulating pump is connected with the ground source heat pump unit through a first branch tube, the ground source heat pump unit is connected with a water inlet end of the coil through a second water tube, the coil is pre-buried in a building room, a water outlet end of the coil is connected with the second circulating pump through the second branch tube, and the second circulating pump is connected with the heat exchange tube set through a return tube. The invention can effectively improve the indoor heating effect, but the heat source selection is single, when the heat source condition is not favorable for the ground source heat pump to work, the heat source can not be changed, and simultaneously, the running state can not be monitored in real time, and the invention is not favorable for detecting the fault of the system pipeline.
Disclosure of Invention
The invention aims to overcome the problems that the working stability and efficiency are influenced due to too single heat source selection of a ground source heat pump and parts are inconvenient to detect, maintain and replace in the prior art, and provides the ground source heat pump which has redundant heat source selection and is convenient to overhaul; in addition, by adding the data collection device, the electromagnetic valve and other configurations, the running state is monitored in real time, the running of the ground source heat pump is controlled, and the heat source switching is controlled, so that the maintenance and replacement work of related personnel is facilitated.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ground source heat pump with redundant heat source selection and convenient maintenance is characterized by comprising a data acquisition module and a ground source side heat exchanger; the data acquisition module acquires the operation data of the ground source heat pump; the heat exchanger on the ground edge side has a heat source selection function, the heat exchanger on the ground edge side is connected with a four-way reversing valve, and the four-way reversing valve is also connected with two ends of a heat pump compressor and a heat exchanger on a user side; the ground source side heat exchanger is connected with the user side heat exchanger through a throttle valve; the ground source side heat exchanger consists of a plurality of heat exchange modules, each heat exchange module comprises an inner pipe and an outer cavity wrapping the inner pipe, the inner pipe is in a branch shape and can be used for circulating a circulating medium, and the interfaces at the two ends of the inner pipe are provided with electromagnetic valves; the space between the outer cavity and the inner tube can be used for heat source liquid to flow, and each input and output interface of the outer cavity is provided with an electromagnetic valve.
In the invention, the four-way reversing valve is used for changing a pipeline path so as to switch two working states of refrigeration and heating of the ground source heat pump; the heat pump compressor is used for compressing the circulating medium, so that the pressure and the temperature of the circulating medium passing through the heat pump compressor are improved, and circulating power is provided for the medium; the user side heat exchanger is used for heat exchange between the circulating gas and the indoor space, and achieves the indoor refrigerating or heating effect through heat absorption or heat release of the circulating gas; the throttle valve is also called an expansion valve, and can play the roles of throttling, reducing pressure and regulating flow. The data acquisition module can collect and arrange the operation data of the ground source heat pump and provide data support for detection, maintenance and operation state judgment of the heat pump. The ground source side heat exchanger is used for carrying out heat exchange between the circulating medium and the heat source liquid, and also can be used for switching the heat source and selecting different heat sources for working.
Preferably, the branched inner pipe is a net pipe formed by a plurality of transverse pipes and a plurality of vertical pipes in a criss-cross manner; the input end of the network management pipe is a circulating medium input pipe of the branched inner pipe, and the output end of the network management pipe is a circulating medium output pipe of the branched inner pipe.
Preferably, the outer cavity covers the inner tube and leaves a space for flowing heat source liquid; one end of the outer cavity is connected with the circulating medium input pipe of the inner pipe in a waterproof sealing manner, and a first output interface and a second output interface are distributed around the outer cavity; the other end of the outer cavity is connected with a circulating medium output pipe of the inner pipe in a waterproof sealing mode, and a third input interface and a fourth input interface are distributed on the periphery of the outer cavity.
The single heat exchange module consists of an inner pipe with a branch structure and an outer cavity wrapping the inner pipe, the inner pipe adopts the branch structure, so that the heat exchange area between a circulating medium and heat source liquid can be increased, and the heat exchange efficiency is improved; the outer cavity wraps the inner tube according to the outline of the inner tube, and the gap distance between the outer cavity and the inner tube is the same, so that heat source liquid can completely cover the surface of the whole inner tube when flowing in the gap between the inner tube and the outer cavity, the effective heat exchange area is increased, and the heat exchange effect is improved. In addition, the two ends of the outer cavity are respectively connected with the input pipe and the output pipe of the inner pipe in a waterproof and sealing manner, so that the leakage of heat source liquid can be prevented, and the positions of the outer cavity and the inner pipe can be fixed to form a complete heat exchange module. And with regard to the arrangement of the output interface and the input interface, the first output interface and the third input interface can be positioned on the opposite surface of the outer cavity, and the second output interface and the fourth input interface are positioned on the opposite surface of the outer cavity, so that the circulating flow of the heat source liquid is more sufficient.
Preferably, the circulating medium input pipes of all the inner pipes in the ground source side heat exchanger are connected in parallel to the total circulating medium inlet; the circulating medium output pipes of all the inner pipes are connected in parallel to the total circulating medium outlet.
The circulating medium can be distributed to the circulating medium input pipe of each heat exchange module after flowing in from the total circulating medium inlet, so that heat exchange can be carried out in a plurality of heat exchange modules at the same time, the heat exchange speed is improved, and then the circulating medium is gathered from each circulating medium output pipe to the total circulating medium outlet to continue circulation. Meanwhile, due to the fact that the electromagnetic valves are installed at the positions of the joints such as the input and the output of the heat exchange module, the electromagnetic valves at the positions of the joints of part of the heat exchange module can be closed, so that part of the heat exchange module does not work, and the rest of the heat exchange module continues to perform heat exchange work. By the mode, when relevant personnel carry out overhauling and maintenance work on the ground source heat pump, the ground source heat pump can still carry out indoor refrigeration or heating operation, and meanwhile, the relative independence of the heat exchange module can also facilitate the maintenance and replacement of the relevant personnel aiming at specific parts, so that the heat exchange module is more convenient.
Preferably, the first output interfaces of all the outer cavities in the ground source side heat exchanger are connected in parallel to the first heat source liquid main interface; the second output interfaces of all the outer cavities are connected in parallel to the second heat source liquid main interface; the third input interfaces of all the outer cavities are connected in parallel to the third heat source liquid main interface; and the fourth input interfaces of all the outer cavities are connected in parallel to the fourth heat source liquid main interface.
In all heat exchange modules of the ground source side heat exchanger, all the outer cavity input and output interfaces have the same connection mode as the input and output interfaces of the inner tube and are connected in parallel and gathered to the first heat source liquid main interface, the second heat source liquid main interface, the third heat source liquid main interface and the fourth heat source liquid main interface. When the work of a part of heat exchange modules is required to be stopped, the electromagnetic valve between the outer cavity input/output interface and the heat source liquid main inlet/outlet can be continuously closed while the electronic valve of the inner tube input/output port is closed before the work of the part of heat exchange modules is closed, so that the part of heat exchange modules is isolated from the whole ground source side heat exchanger, and the whole ground source side heat exchanger cannot be influenced by the subsequent operation of the part of heat exchange modules. So that the ground source side heat exchanger can be maintained in the working process, such as overhauling, replacing and the like.
Preferably, in the ground source side heat exchanger, a first heat source liquid main interface and a third heat source liquid main interface are connected with a main heat source for circulation; the second heat source liquid main interface and the fourth heat source liquid main interface are connected with a standby heat source for circulation.
When the heat source is switched, the electromagnetic valves of the first heat source liquid main interface and the third heat source liquid main interface are conducted, and the electromagnetic valves of the second heat source liquid main interface and the fourth heat source liquid main interface are closed, so that the heat exchanger can be communicated with the main heat source for circulation; and the electromagnetic valves of the first heat source liquid main interface and the third heat source liquid main interface are closed, and the electromagnetic valves of the second heat source liquid main interface and the fourth heat source liquid main interface are switched on, so that the heat exchanger is communicated with a standby heat source for circulation.
Preferably, the data acquisition module comprises a temperature sensor, a flow sensor and an electric energy meter. The temperature sensor and the flow sensor form a temperature and flow detection assembly which is respectively connected with an input port and an output port of the user side heat exchanger and an input port and an output port of the ground source side heat exchanger and used for detecting the temperature and the flow of the input and the output of the circulating medium and the heat source liquid and judging the working state of the heat pump and the part with possible problems according to the data change; the electric energy meter is respectively connected to the heat pump compressor, the main heat source water pump and the standby heat source water pump, and the consumed electric quantity of the electric energy meter is measured and used as a basis for calculating energy efficiency ratio judgment.
Preferably, the ground source heat pump further comprises a control center, the control center automatically analyzes working data, controls the switching of the refrigeration mode and the heating mode, controls the selection of a heat source, and can isolate the heat exchange module by controlling the on-off of the electromagnetic valve.
The control center controls the on-off of the electromagnetic valve, and the ground source side heat exchanger is connected with the main heat source or the standby heat source through the on-off of the electromagnetic valve so as to achieve the purpose of heat source selection. In addition, the control center compares and analyzes the data of the data acquisition module with a preset standard threshold value, and judges the working state of the ground source heat pump and the operating conditions of all parts, so that the ground source heat pump can be maintained and overhauled by related personnel conveniently.
The invention has the following beneficial effects: by optimizing and improving the heat exchange module in the ground source side heat exchanger, the inner pipe with a branched structure and the outer cavity which is simultaneously connected with the main heat source and the standby heat source are adopted, so that the ground source side heat exchanger has a heat source selection function; the switching of the heat source is flexibly controlled by opening and closing the electromagnetic valve through the electromagnetic valve arranged at the input and output interface of the heat exchange module; a thermometer, a flowmeter and an electric energy meter are additionally arranged in the system, so that the running data of the system can be acquired in real time, the working state can be judged, and the equipment maintenance is facilitated; the ground source side heat exchanger is formed by connecting a plurality of relatively independent heat exchange modules in parallel, partial modules are isolated out of the heat exchanger through closing of the electromagnetic valve, the partial modules can be overhauled and the like when the heat pump works, and the heat exchange modules can be conveniently replaced.
Drawings
FIG. 1 is a schematic diagram of a heat exchange unit of a source side heat exchanger of the present invention;
FIG. 2 is a side view of a heat exchange unit of a ground source side heat exchanger of the present invention;
FIG. 3 is a schematic illustration of a source side heat exchanger of the present invention;
FIG. 4 is a schematic view of the ground source heat pump refrigeration mode of the present invention;
fig. 5 is a schematic diagram of the heating mode of the ground source heat pump of the present invention;
in the figure: 1. a user side heat exchanger; 2. a four-way reversing valve; 3. a heat pump compressor; 4. a ground source side heat exchanger; 5. a throttle valve; 6. a temperature flow detection assembly; 7. an electric energy meter; 8. an electromagnetic valve; 9. a heat exchange module; 10. a water pump; 41. a total circulating medium inlet; 42. a total circulating medium outlet; 43. a first heat source liquid main interface; 44. a fourth heat source liquid main interface; 45. a second heat source liquid main interface; 46. a third heat source liquid main interface; 91. a circulating medium input pipe; 92. a circulating medium output pipe; 93. a first output interface; 94. a second output interface; 95. a fourth output interface; 96. a third output interface; 97. an outer cavity; 98. an inner tube; 981. a transverse tube; 982. a standpipe.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 3, a ground source heat pump with redundant heat source selection and convenient maintenance includes a four-way reversing valve, a heat pump compressor, a user side heat exchanger and a throttle valve, and further includes a data acquisition module and a ground source side heat exchanger with a heat source selection function; the data acquisition module acquires the operation data of the ground source heat pump; the four-way reversing valve is respectively connected with two ends of the heat pump compressor, the user side heat exchanger and the ground source side heat exchanger, and the ground source side heat exchanger is connected with the user side heat exchanger through the throttle valve; the ground source side heat exchanger consists of a plurality of heat exchange modules, each heat exchange module comprises a branched inner pipe and an outer cavity wrapping the inner pipe, the branched inner pipe can be used for circulating a circulating medium, and interfaces at two ends of the inner pipe are provided with electromagnetic valves; the space between the cavity and the inner pipe can be used for the flow of heat source liquid, and each input/output interface of the outer cavity is provided with an electromagnetic valve.
As shown in fig. 1, the branched inner tube is a mesh tube formed by six transverse tubes and six vertical tubes which are criss-crossed; the input end of the network management pipe is a circulating medium input pipe of the branched inner pipe, and the output end of the network management pipe is a circulating medium output pipe of the branched inner pipe. The outer cavity wraps the inner tube, the distance between the outer cavity and the inner tube is the same, a space for flowing heat source liquid is reserved, one end of the outer cavity is connected with the circulating medium input tube of the inner tube in a waterproof sealing mode, and a first output interface and a second output interface are distributed on the left side and the right side of the outer cavity; the other end is connected with the circulating medium output pipe of the inner pipe in a waterproof and sealing way, and the left side and the right side of the inner pipe are distributed with a third input interface and a fourth input interface.
As shown in fig. 2, the circulating medium input pipes of all the inner pipes in the ground source side heat exchanger are connected in parallel to the total circulating medium inlet; the circulating medium output pipes of all the inner pipes are connected in parallel to the total circulating medium outlet. The first output interfaces of all outer cavities in the ground source side heat exchanger are connected in parallel to the first heat source liquid main interface; the second output interfaces of all the outer cavities are connected in parallel to the second heat source liquid main interface; the third input interfaces of all the outer cavities are connected in parallel to the third heat source liquid main interface; and the fourth input interfaces of all the outer cavities are connected in parallel to the fourth heat source liquid main interface. In the ground source side heat exchanger, a first heat source liquid main interface and a third heat source liquid main interface are connected with a main heat source for circulation; the second heat source liquid main interface and the fourth heat source liquid main interface are connected with a standby heat source for circulation.
The data acquisition module also comprises a temperature sensor, a flow sensor and an electric energy meter. The temperature sensor and the flow sensor form a temperature and flow detection assembly which is respectively connected with an input port and an output port of the user side heat exchanger and an input port and an output port of the ground source side heat exchanger and used for detecting the temperature and the flow of the input and the output of the circulating medium and the heat source liquid and judging the working state of the heat pump and the part with possible problems according to the data change; the electric energy meter is respectively connected to the heat pump compressor, the main heat source water pump and the standby heat source water pump, and the consumed electric quantity of the electric energy meter is measured and used as a basis for calculating the energy efficiency ratio.
The ground source heat pump also comprises a control center, wherein the control center automatically analyzes working data, controls the switching of the refrigeration mode and the heating mode, controls the selection of a heat source, and can also isolate the heat exchange module by controlling the on-off of the electromagnetic valve so as to be convenient to overhaul and replace. The control center controls the on-off of the electromagnetic valve, and the ground source side heat exchanger is connected with the main heat source or the standby heat source through the on-off of the electromagnetic valve so as to achieve the purpose of heat source selection. In addition, the control center compares and analyzes the data of the data acquisition module with a preset standard threshold value, and judges the working state of the ground source heat pump and the operating conditions of all parts, so that the ground source heat pump can be maintained and overhauled by related personnel conveniently.
In the invention, the four-way reversing valve is used for changing a pipeline path so as to switch two working states of refrigeration and heating of the ground source heat pump; the heat pump compressor is used for compressing the circulating medium, so that the pressure and the temperature of the circulating medium passing through the heat pump compressor are improved, and circulating power is provided for the medium; the user side heat exchanger is used for heat exchange between the circulating gas and the indoor space, and achieves the indoor refrigerating or heating effect through heat absorption or heat release of the circulating gas; the throttle valve is also called an expansion valve, and can play the roles of throttling, reducing pressure and regulating flow. The data acquisition module collects and arranges the operation data of the ground source heat pump and provides data support for detection and maintenance and judgment of the operation state of the heat pump.
The ground source side heat exchanger having the heat source selection function is an important part of the present invention, and can control the heat exchange of the main heat source liquid circulation or the heat exchange of the standby heat source liquid circulation by the on-off of the solenoid valve installed at each interface. Meanwhile, the ground source side heat exchanger consists of a plurality of heat exchange modules, so that part of the heat exchange modules work through the on-off of the electromagnetic valve, and the rest of the heat exchange modules do not work or are maintained; meanwhile, a part of heat exchange modules can perform main heat source circulation, and a part of heat exchange modules can perform standby heat source circulation; the heat source selection of the heat exchanger is more flexible, the working performance of the ground source heat pump cannot be influenced due to the problem of a single heat source, and the working efficiency of the ground source heat pump can be improved by adjusting the circulation ratio of the two heat sources as necessary.
The single heat exchange module consists of an inner pipe with a branched structure and an outer cavity wrapping the inner pipe, the inner pipe adopts the branched structure, so that the heat exchange area between a circulating medium and heat source liquid can be increased, and the heat exchange efficiency is improved; the outer cavity wraps the inner tube according to the outline of the inner tube, and the gap distance between the outer cavity and the inner tube is the same, so that heat source liquid can completely cover the surface of the whole inner tube when flowing in the gap between the inner tube and the outer cavity, the effective heat exchange area is increased, and the heat exchange effect is improved. In addition, the two ends of the outer cavity are respectively connected with the input pipe and the output pipe of the inner pipe in a waterproof and sealing way, so that the leakage of heat source liquid is prevented, and the positions of the outer cavity and the inner pipe are fixed, thereby forming a complete heat exchange module. And with regard to the arrangement of the output interface and the input interface, the first output interface and the third input interface can be positioned on the opposite surface of the outer cavity, and the second output interface and the fourth input interface are positioned on the opposite surface of the outer cavity, so that the circulating flow of the heat source liquid is more sufficient.
The circulating medium can be distributed to the circulating medium input pipe of each heat exchange module after flowing in from the total circulating medium inlet, so that heat exchange can be simultaneously carried out in a plurality of heat exchange modules, the heat exchange speed is improved, and then the circulating medium is gathered from each circulating medium output pipe to the total circulating medium outlet to be continuously circulated. Meanwhile, because the solenoid valves are installed at the interfaces of the input and the output of the heat exchange module, the solenoid valves at the interfaces of part of the heat exchange modules can be closed, so that part of the heat exchange modules do not work, and the rest of the heat exchange modules continue to perform heat exchange work. By the mode, when relevant personnel carry out overhauling and maintenance work on the ground source heat pump, the ground source heat pump can still carry out indoor refrigeration or heating operation, and meanwhile, the relative independence of the heat exchange module can also facilitate the maintenance and replacement of the relevant personnel aiming at specific parts, so that the heat exchange module is more convenient.
In all heat exchange modules of the ground source side heat exchanger, all the outer cavity input and output interfaces have the same connection mode as the input and output interfaces of the inner tube and are connected in parallel and gathered to the first heat source liquid main interface, the second heat source liquid main interface, the third heat source liquid main interface and the fourth heat source liquid main interface. When the work of a part of heat exchange modules is required to be stopped, the electromagnetic valve between the input and output ports of the outer cavity and the main inlet and outlet of the heat source liquid can be continuously closed while the electronic valve of the input and output ports of the inner tube is closed before the work, so that the part of heat exchange modules is isolated from the whole ground source side heat exchanger, and the whole ground source side heat exchanger cannot be influenced by the subsequent operation of the part of heat exchange modules. So that the ground source side heat exchanger can be maintained in the process of working, such as overhaul, replacement and the like.
When the main heat source is used for heat exchange, after the heat source liquid releases heat or absorbs heat, the heat source liquid flows into and flows out of the ground source side heat exchanger through the first heat source liquid main interface and the third heat source liquid main interface and then returns to the main heat source; when the standby heat source is used for heat exchange work, heat source liquid flows into the ground source side heat exchanger through the second heat source liquid main interface and the fourth heat source liquid main interface after releasing heat or absorbing heat in the standby heat source and returns to the standby heat source. When the heat source is switched, the electromagnetic valves of the first heat source liquid main interface and the third heat source liquid main interface are switched on, and the electromagnetic valves of the second heat source liquid main interface and the fourth heat source liquid main interface are switched off to enable the heat exchanger to be communicated with the main heat source for circulation; and closing the electromagnetic valves of the first heat source liquid main interface and the third heat source liquid main interface, and switching on the electromagnetic valves of the second heat source liquid main interface and the fourth heat source liquid main interface to enable the heat exchanger to be communicated with a standby heat source for circulation.
The refrigeration mode of the ground source heat pump is shown in figure 3, and the process is as follows: the system comprises a user side heat exchanger (circulating medium evaporates and absorbs indoor heat), a four-way reversing valve, a heat pump compressor (compressing to raise the temperature and raise the pressure of the circulating medium), a four-way reversing valve, a ground source side heat exchanger (the circulating medium and heat source liquid perform full heat exchange, the circulating medium releases heat and the heat source liquid absorbs heat), a throttling valve (throttling and reducing pressure), and a user side heat exchanger (the circulating medium continuously absorbs heat).
The heating mode of the ground source heat pump in the invention is shown in figure 4, and the process is as follows: the method comprises the steps of a ground source side heat exchanger (heat exchange between circulating medium and heat source liquid, heat absorption of the circulating medium and heat release of the heat source liquid), a four-way reversing valve, a heat pump compressor (compression enables the circulating medium to be heated and boosted), the four-way reversing valve, a user side heat exchanger (heat dissipation of the circulating medium and indoor temperature increase), a throttling valve (throttling and pressure reduction), and the ground source side heat exchanger (continuous heat absorption of the circulating medium).
In the embodiment of the invention, a closed circulation mode is adopted, and water is used as heat source liquid in the main heat source and the standby heat source to carry heat to circulate between the heat source and the ground source side heat exchanger. The main heat source is directly buried, the occupied area is small, the heat source is positioned at a deeper position from the ground, and the periphery of the heat source is stable; the standby heat source adopts a horizontal pipe burying mode, is close to the ground, is convenient to carry out subsequent operation after installation, and is beneficial to being adopted and replaced by other standby heat sources; the standby heat source can also adopt surface water such as flowing river water, lake water, underground water and the like, and is suitable for users with rich water resources to select as the standby heat source.
In the following, how the ground source heat pump of the present invention can be maintained while operating is further described, taking the refrigeration mode of the ground source heat pump as an example, the ground source heat pump performs the circulation of the user side heat exchanger, the four-way reversing valve, the heat pump compressor, the four-way reversing valve, the ground source side heat exchanger, the throttle valve and the user side heat exchanger.
When a fault is analyzed on the part of the ground source side heat exchanger or a maintenance worker needs to maintain and replace the ground source side heat exchanger, the ground source side heat exchanger is composed of a plurality of heat exchange modules, and the heat exchange modules can be divided into a first group, a second group and a third group for alternate detection. When the ground source heat pump is in an initial state, the first group of heat exchange modules, the second group of heat exchange modules and the third group of heat exchange modules are in a working state, firstly, the first group of heat exchange modules are isolated from the heat exchanger by closing electromagnetic valves of all interfaces of the first group of heat exchange modules, and the first group of heat exchange modules are maintained or replaced, and meanwhile, the second group of heat exchange modules and the third group of heat exchange modules still work to refrigerate the ground source heat pump; after the first group of heat exchange modules are maintained, the electromagnetic valve is conducted again to connect the first group of heat exchange modules into the heat exchanger, isolate the second group of heat exchange modules from the heat exchanger, and maintain and replace the second group of heat exchange modules; the electromagnetic valves of the second group of heat exchange modules are switched on, the electromagnetic valves of the third group of heat exchange modules are switched off, and the third group of heat exchange modules are maintained and replaced. The maintenance and the replacement of the ground source side heat exchanger are finished after the whole process.
When the heat exchanger on the ground source side is not in a problem, a maintenance worker can carry a machine cabinet with the same functions of the heat exchanger on the user side, the four-way reversing valve, the heat pump compressor, the throttle valve and the like, the inlet and the outlet of a total circulating medium of the heat exchanger on the ground source side in a ground source heat pump system of the user are isolated from the system through the electromagnetic valve, and then the machine cabinet is connected into the machine cabinet carried by the maintenance worker, so that the machine cabinet and the heat exchanger on the ground source side form a temporary ground source heat pump for refrigerating the indoor space. Meanwhile, maintenance personnel can carry out maintenance and replacement operations on the original ground source heat pump system with problems.
During the initial refrigeration mode, the ground source heat pump adopts a directly-buried main heat source as a heat release object, the standby heat pump is in a standby state, when the problem of a directly-buried pipeline in the main heat source is detected or a maintenance worker needs to overhaul the pipeline of the main heat source, the electromagnetic valves between all the main heat source and the ground source side heat exchanger (namely all the electromagnetic valves on the first heat source liquid main interface and the third heat source liquid main interface) are closed, the main heat source pipeline is isolated from the ground source heat pump system, the electromagnetic valves between the standby heat source and the ground source side heat exchanger (namely all the electromagnetic valves on the second heat source liquid main interface and the third heat source liquid main interface) are conducted at the same time, the standby heat source pipeline is connected with the ground source heat pump system, and in the refrigeration mode, the standby heat source heat pump takes the standby heat source as the heat release object and can still work. And maintenance personnel can also overhaul the main heat source pipeline simultaneously, and the refrigeration working state of the ground source heat pump can not be influenced.
The above embodiments are illustrative and described for the purposes of description, not limitation, and all changes, equivalents and modifications that come within the spirit and scope of the invention are desired to be protected.
Claims (5)
1. A ground source heat pump with redundant heat source selection and convenient maintenance is characterized by comprising a data acquisition module and a ground source side heat exchanger; the data acquisition module acquires the operation data of the ground source heat pump; the ground source side heat exchanger has a heat source selection function, is connected with a four-way reversing valve, and is also connected with two ends of a heat pump compressor and a user side heat exchanger; the ground source side heat exchanger is connected with the user side heat exchanger through a throttle valve;
in the ground source side heat exchanger, a first heat source liquid main interface and a third heat source liquid main interface are connected with a main heat source for circulation; the second heat source liquid main interface and the fourth heat source liquid main interface are connected with a standby heat source for circulation; the ground source side heat exchanger consists of a plurality of heat exchange modules, and each heat exchange module comprises an inner pipe and an outer cavity wrapping the inner pipe;
the first output interfaces of all the outer cavities are connected in parallel to the first heat source liquid main interface; all the second output interfaces of the outer cavities are connected in parallel to the second heat source liquid main interface; all the third input interfaces of the outer cavities are connected in parallel to the third heat source liquid main interface; all the fourth input interfaces of the outer cavity are connected in parallel to the fourth heat source liquid main interface;
the inner pipe is branched and can be used for circulating a medium, and the interfaces at the two ends of the inner pipe are provided with electromagnetic valves; the space between the outer cavity and the inner tube can be used for heat source liquid to flow, and each input/output interface of the outer cavity is provided with an electromagnetic valve; by switching on and off the electromagnetic valve, part of the heat exchange modules work, and the rest of the heat exchange modules do not work or are maintained; meanwhile, a part of heat exchange modules can perform main heat source circulation, and a part of heat exchange modules perform standby heat source circulation, so that the circulation ratio of the two heat sources is adjusted to improve the working efficiency of the ground source heat pump;
the branched inner pipe is a net pipe formed by a plurality of transverse pipes and a plurality of vertical pipes in a criss-cross manner; the input end of the mesh pipe is a branched circulating medium input pipe of the inner pipe, and the output end of the mesh pipe is a branched circulating medium output pipe of the inner pipe; the outer cavity covers the inner pipe and a space for heat source liquid to flow is reserved;
in the ground source side heat exchanger, each heat exchange module is relatively independent, and the input and output interfaces of the heat exchange modules are provided with electromagnetic valves.
2. The ground source heat pump with redundant heat source selection and convenient maintenance as claimed in claim 1, wherein one end of the outer cavity is connected with the circulating medium input pipe of the inner pipe in a waterproof and sealed manner, and a first output interface and a second output interface are distributed around the outer cavity; the other end of the outer cavity is connected with a circulating medium output pipe of the inner pipe in a waterproof and sealed mode, and a third input interface and a fourth input interface are distributed on the periphery of the outer cavity.
3. The ground source heat pump with redundant heat source selection and convenient maintenance as claimed in claim 1, characterized in that the circulating medium input pipes of all inner pipes in the ground source side heat exchanger are connected in parallel to the total circulating medium inlet; the circulating medium output pipes of all the inner pipes are connected in parallel to the total circulating medium outlet.
4. The ground source heat pump with redundant heat source selection and convenient maintenance as claimed in claim 1, wherein the data acquisition module comprises temperature sensors for measuring the working temperature everywhere; the flow sensor is used for measuring the flow of the circulating medium and the heat source liquid; and the electric energy meter is used for measuring the power consumption of the ground source heat pump.
5. The ground source heat pump with redundant heat source selection and convenient maintenance as claimed in claim 1, further comprising a control center, wherein the control center automatically analyzes the working data, controls the switching of the cooling and heating modes, controls the selection of the heat source, and can also isolate the heat exchange module by controlling the on/off of the solenoid valve.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4437124A1 (en) * | 1993-06-04 | 1996-04-11 | Ver Energiewerke Ag | Geothermal heating system using water |
| CN1788152A (en) * | 2003-05-10 | 2006-06-14 | 沃尔夫冈·费特 | Motot vehicle and fuel cooler with lamellar inner structures for connecting to the air-conditioning system |
| CN101846467A (en) * | 2010-04-28 | 2010-09-29 | 东南大学 | Shell-tube heat exchanger |
| CN202204208U (en) * | 2011-07-27 | 2012-04-25 | 挪信能源技术（上海）有限公司 | Combined-type ground source heat pump system for surface water peak regulation |
| CN204043107U (en) * | 2014-08-31 | 2014-12-24 | 江苏省地矿地热能有限公司 | modular heat exchanger |
| CN206281382U (en) * | 2016-12-26 | 2017-06-27 | 孙翔 | A kind of heat exchanger for earth source heat pump |
| CN210891998U (en) * | 2019-09-19 | 2020-06-30 | 山东省聊城市新鹏都置业有限公司 | Capillary network ground source heat pump air conditioning system |
| CN210980432U (en) * | 2019-12-17 | 2020-07-10 | 吉林建筑科技学院 | Ground source heat pump heat exchanger |
| CN112903332A (en) * | 2021-02-25 | 2021-06-04 | 中国人民解放军军事科学院国防工程研究院 | Multifunctional ground source heat pump system test bed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841528B (en) * | 2016-03-29 | 2017-08-01 | 上海理工大学 | The double thermal source heat exchangers of heat pipe-type and double thermal source heat-exchange systems |
-
2021
- 2021-07-12 CN CN202110784022.1A patent/CN113587492B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4437124A1 (en) * | 1993-06-04 | 1996-04-11 | Ver Energiewerke Ag | Geothermal heating system using water |
| CN1788152A (en) * | 2003-05-10 | 2006-06-14 | 沃尔夫冈·费特 | Motot vehicle and fuel cooler with lamellar inner structures for connecting to the air-conditioning system |
| CN101846467A (en) * | 2010-04-28 | 2010-09-29 | 东南大学 | Shell-tube heat exchanger |
| CN202204208U (en) * | 2011-07-27 | 2012-04-25 | 挪信能源技术（上海）有限公司 | Combined-type ground source heat pump system for surface water peak regulation |
| CN204043107U (en) * | 2014-08-31 | 2014-12-24 | 江苏省地矿地热能有限公司 | modular heat exchanger |
| CN206281382U (en) * | 2016-12-26 | 2017-06-27 | 孙翔 | A kind of heat exchanger for earth source heat pump |
| CN210891998U (en) * | 2019-09-19 | 2020-06-30 | 山东省聊城市新鹏都置业有限公司 | Capillary network ground source heat pump air conditioning system |
| CN210980432U (en) * | 2019-12-17 | 2020-07-10 | 吉林建筑科技学院 | Ground source heat pump heat exchanger |
| CN112903332A (en) * | 2021-02-25 | 2021-06-04 | 中国人民解放军军事科学院国防工程研究院 | Multifunctional ground source heat pump system test bed |
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