CN108387030B - Heat pump system based on open type cold water solidification heat exchanger - Google Patents
Heat pump system based on open type cold water solidification heat exchanger Download PDFInfo
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- CN108387030B CN108387030B CN201810014734.3A CN201810014734A CN108387030B CN 108387030 B CN108387030 B CN 108387030B CN 201810014734 A CN201810014734 A CN 201810014734A CN 108387030 B CN108387030 B CN 108387030B
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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
- F25B30/02—Heat pumps of the compression type
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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Abstract
The invention relates to a heat pump system based on an open cold water solidification heat exchanger, which comprises a refrigerant circulation loop, a heating circulation loop, a condenser and an evaporator, and is characterized by also comprising a cold water pipeline, a refrigerant heat exchange circulation loop, an open cold water solidification heat exchanger, a deicing loop and a deicing heat exchanger, wherein the cold water pipeline exchanges heat with the refrigerant heat exchange circulation loop through the open cold water solidification heat exchanger, the refrigerant heat exchange circulation loop exchanges heat with the refrigerant circulation loop through the evaporator, the deicing loop exchanges heat with the heating circulation loop through the deicing heat exchanger, the heated refrigerant is used for deicing the open cold water solidification heat exchanger, and the inlet end of a condenser circulating water channel is simultaneously communicated with a first pipeline and the outlet end of a circulating water channel in the deicing heat exchanger. The ice removing machine deicing method has the advantages that the mode of combining the hot medium ice melting and the gravity ice removing is adopted for deicing, the deicing speed is high, the deicing is thorough, the power consumption is low, the continuous extraction of the solidification heat of cold water for indoor heat supply can be realized, and meanwhile, the long-term efficient and stable operation of a unit can be guaranteed.
Description
Technical Field
The invention relates to the field of heat pump air conditioners, in particular to a heat pump system based on an open type cold water solidification heat exchanger.
Background
The water source heat pump is an energy-saving device for heating and cooling buildings by acquiring low-grade heat from water sources (such as surface water, underground water, domestic sewage and the like) by adopting a heat pump technology, and compared with the conventional fossil fuel combustion heating, the water source heat pump is environment-friendly and pollution-free, has high efficiency, generally COP (coefficient of performance) of about 4 and has great market advantage. As for the surface water source heat pump, it is known that the temperature of the surface water decreases with the decrease of the outdoor air temperature, and research shows that when the outdoor air temperature reaches-10 ℃, the temperature of the surface water is only 4 ℃, obviously, the surface water with the temperature has little sensible heat available, so that in this case, the heat supply by using the surface water source heat pump system is obviously infeasible; as for the sewage source heat pump, although the temperature of the sewage is relatively high (generally about 20 ℃), research shows that even if the sensible heat of the sewage is utilized to the maximum extent, the available heat in the sewage discharged by 7 to 10 buildings on average can be used for heating only one building, and obviously, the sewage source heat pump also has the problem of insufficient sewage source. Based on the reasons, the application of the water source heat pump is greatly limited, and particularly, in severe cold regions, special technical measures are urgently needed to solve the problem.
The latent heat of solidification of water is 335kj/kg, which is 80 times of the heat released by 1kg of water at 1 ℃, and if a heat pump unit using cold water solidification heat as a low-temperature heat source can be developed, most areas (including severe cold areas) in China have inexhaustible water source heat sources, and all water below the frozen surface of natural water can be used as the heat source of the water source heat pump. When urban sewage is used as a heat source, the problem of insufficient water near a building does not exist any more. Research shows that about 15% of latent heat contained in sewage is extracted by a method for extracting solidification heat, and the heat energy of the sewage discharged by each building can be basically ensured to be self-sufficient. If the technology for extracting cold water solidification heat is mature, the water source heat pump is used for replacing fire coal to supply heat for the building, and the problem of insufficient water source is solved.
The Chinese patent application No. 2006100096160 entitled cold water solidification heat collecting device removes ice layers generated when cold water in a pipe and ethylene glycol outside the pipe exchange heat through arranging a flood dragon scraper in a heat exchange pipe. Meanwhile, the flow resistance of water in the pipe can be increased, and the power consumption of the water pump is increased.
The Chinese patent application No. 2006100096175 entitled "solidification latent heat pump for defrosting by using sensible heat of low-level heat source water supply" is mainly composed of an icing chamber and two evaporation chambers, wherein cold water is used for heating and humidifying air in the icing chamber, the temperature of the air after heating and humidifying is close to 0 ℃, the humidity is close to saturation, the cold water is solidified into ice, then the air enters the evaporation chamber which is not defrosting and exchanges heat with refrigerant, the temperature and the humidity of the air after exchanging heat with the refrigerant are reduced, and the air returns to the icing chamber again for heating and humidifying. The technical scheme has the advantages of complex system, large occupied area, high frosting speed, high defrosting frequency, poor system operation stability and no energy conservation.
As is known, the extraction of the freezing heat of cold water is to utilize the heat released by the cold water freezing into ice, and the processes of freezing and deicing water are similar to the principle of the existing ice making machine and can be developed by referring to the principle. For example, in a patent of chinese patent application No. 2015108645983 entitled "a shower heat pump unit using water as a heat source", a half brazed plate heat exchanger is used as an evaporator, and a shower device is provided above the evaporator to allow cold water to fall along a wall surface to exchange heat with a refrigerant on the other side of the wall surface, while the cold water freezes on the wall surface. The technical scheme has the defects that the four-way valve is required to be reversed during deicing (similar to the reverse cycle defrosting principle of the air-cooled heat pump), so that the room temperature of a heat user can be reduced (by about 5 ℃), the indoor comfort is poor, and the running stability of the unit is poor due to frequent switching of the unit, and the service life of the unit is shortened. Meanwhile, the existence of the spraying device can also increase the power consumption of the water pump.
The Chinese patent with the application number of '2015106093894' and the name of 'a solidification hot water source heat pump system suitable for low-temperature environment' also has the problem of 'four-way valve reversing', and the technical scheme has the advantages that the ice layer is not easy to fall off due to the large contact area between the ice layer and the heat exchange tube during deicing, and the power consumption required by deicing is large.
Therefore, the key of the technology for extracting cold water solidification heat lies in how to minimize deicing power consumption, and meanwhile, the continuous heat supply and long-term efficient and stable operation of a unit are ensured.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the heat pump system based on the open type cold water solidification heat exchanger can continuously extract solidification heat of cold water to supply heat indoors, and is small in deicing power consumption and stable in unit operation.
The invention solves the technical problem by adopting the technical scheme that a heat pump system based on an open cold water solidification heat exchanger comprises a refrigerant circulation loop, a heating circulation loop, a condenser and an evaporator, wherein the refrigerant circulation loop and the heating circulation loop exchange heat through the condenser to heat for user heating, and the heat pump system is characterized by also comprising a cold water pipeline, a refrigerant heat exchange circulation loop, a first open cold water solidification heat exchanger, a second open cold water solidification heat exchanger, a deicing loop and a deicing heat exchanger, wherein the cold water pipeline and the refrigerant heat exchange circulation loop exchange heat through the first open cold water solidification heat exchanger and the second open cold water solidification heat exchanger to heat for refrigerants, the refrigerant heat exchange circulation loop and the refrigerant circulation loop exchange heat through the evaporator to heat for refrigerants, and the deicing loop and the heating circulation loop exchange heat through the deicing heat exchanger to heat for refrigerants, the heated refrigerant is subjected to heat exchange with the first open type cold water solidification heat exchanger or the second open type cold water solidification heat exchanger in the deicing loop to be deiced, the inlet end of a circulating water channel in the condenser is simultaneously communicated with the outlet end of the first pipeline and the outlet end of the circulating water channel in the deicing heat exchanger, and the first electromagnetic valve is arranged on the first pipeline and used for cutting off or connecting the deicing heat exchanger;
the refrigerant circulation loop of the heat pump system comprises a compressor and a throttle valve, wherein an exhaust port of the compressor is communicated with an inlet end of a refrigerant channel in a condenser, an outlet end of the refrigerant channel in the condenser is communicated with an inlet end of a refrigerant channel in an evaporator through the throttle valve, and an outlet end of the refrigerant channel in the evaporator is communicated with an air suction port of the compressor to form a closed refrigerant circulation loop;
the heating circulation loop of the heat pump system comprises a heating water return pipe and a heating water supply pipe, the heating water return pipe is simultaneously communicated with the inlet end of a circulating water channel in the deicing heat exchanger and the inlet end of a first pipeline, the heating water supply pipe is communicated with the outlet end of a circulating water channel in the condenser, the heating water return pipe, the started first electromagnetic valve, the circulating water channel in the condenser and the heating water supply pipe form a heating circulation loop in an icing state, and the heating water return pipe, the circulating water channel in the deicing heat exchanger, the circulating water channel in the condenser and the heating water supply pipe form a heating circulation loop in a refrigerant deicing state;
the cold water pipeline of the heat pump system comprises a cold water pump, a first pressure gauge, a second electromagnetic valve, a second pressure gauge and a third electromagnetic valve, wherein the outlet of the cold water pump is simultaneously connected with the cold water inlet of the first open type cold water solidification heat exchanger and the cold water inlet of the second open type cold water solidification heat exchanger, the inlet of the cold water pump is connected with a water source, and the first pressure gauge and the second electromagnetic valve are sequentially arranged between the cold water inlet of the first open type cold water solidification heat exchanger and the outlet of the cold water pump to form a first cold water pipeline; a second pressure gauge and a third electromagnetic valve are sequentially arranged between a cold water inlet of the second open type cold water solidification heat exchanger and an outlet of the cold water pump to form a second path of cold water pipeline;
the refrigerant heat exchange circulation loop of the heat pump system comprises a first refrigerant pump, a second refrigerant pump, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve and a seventh electromagnetic valve, wherein an inlet of the first refrigerant pump is connected with a refrigerant outlet of the first open type cold water solidification heat exchanger, an outlet of the first refrigerant pump is connected with an inlet end of a refrigerant channel in the evaporator through the fourth electromagnetic valve, and an outlet end of the refrigerant channel in the evaporator is connected with the refrigerant inlet of the first open type cold water solidification heat exchanger through the fifth electromagnetic valve to form a first path of refrigerant heat exchange circulation loop; an inlet of the second refrigerant pump is connected with a refrigerant outlet of the second open type cold water solidification heat exchanger, an outlet of the second refrigerant pump is connected with an inlet end of a refrigerant channel in the evaporator through a sixth electromagnetic valve, and an outlet end of the refrigerant channel in the evaporator is connected with a refrigerant inlet of the second open type cold water solidification heat exchanger through a seventh electromagnetic valve to form a second path of refrigerant heat exchange circulation loop;
the deicing loop of the heat pump system comprises an eighth electromagnetic valve, a ninth electromagnetic valve, a tenth electromagnetic valve and an eleventh electromagnetic valve, wherein the eighth electromagnetic valve is arranged between the outlet end of the first refrigerant pump and the inlet end of a refrigerant channel in the deicing heat exchanger, and the ninth electromagnetic valve is arranged between the outlet end of the refrigerant channel in the deicing heat exchanger and the refrigerant inlet of the first open type cold water solidification heat exchanger to form a first deicing loop; the tenth electromagnetic valve is arranged between the outlet end of the second refrigerant pump and the inlet end of the refrigerant channel in the deicing heat exchanger, and the eleventh electromagnetic valve is arranged between the outlet end of the refrigerant channel in the deicing heat exchanger and the refrigerant inlet of the second open type cold water solidification heat exchanger, so that a second deicing loop is formed.
The second electromagnetic valve and the third electromagnetic valve of the heat pump system are replaced by a first electric three-way valve, the fourth electromagnetic valve and the sixth electromagnetic valve are replaced by a second electric three-way valve, and the fifth electromagnetic valve and the seventh electromagnetic valve are replaced by a third electric three-way valve; the eighth electromagnetic valve and the tenth electromagnetic valve are replaced by a fourth electric three-way valve; and the ninth electromagnetic valve and the eleventh electromagnetic valve are replaced by a fifth electric three-way valve.
The open cold water solidification heat exchanger for the heat pump system based on the open cold water solidification heat exchanger comprises a heat exchange body, a cold water inlet end socket, a refrigerant inlet end socket and a refrigerant outlet end socket, wherein the heat exchange body comprises a cold water channel and a refrigerant channel, a plurality of cold water channels and the refrigerant channel are alternately arranged, the cold water inlet end socket is arranged right above the heat exchange body and is in close contact with the heat exchange body, the cold water inlet end socket is communicated with the inlet end of the cold water channel, the outlet end of the cold water channel is communicated with the atmosphere, and cold water flows from top to bottom in the cold water channel; the refrigerant inlet end socket and the refrigerant outlet end socket are respectively arranged at the lowest end and the uppermost end of the side face of the heat exchange body and are in close contact with the heat exchange body, the refrigerant inlet end socket is communicated with the inlet end of the refrigerant channel, the refrigerant outlet end socket is communicated with the outlet end of the refrigerant channel, and the refrigerant is in countercurrent heat exchange with cold water flowing from top to bottom through the partition plate while flowing from bottom to top in the refrigerant channel.
The cold water channel comprises partition plates and sealing strips, every two adjacent partition plates are fixedly connected through the sealing strips at the left end and the right end, the upper end of the cold water channel is an inlet end, and the lower end of the cold water channel is an outlet end.
The refrigerant channel comprises partition plates and sealing strips, every two adjacent partition plates are fixedly connected through the sealing strips at the upper end, the lower end, the left end and the right end, and the lower end and the upper end of the refrigerant channel are inlet ends and outlet ends respectively.
The open type cold water solidification heat exchanger is characterized in that a plurality of heat exchange fins are arranged in a cold water channel of a heat exchange body of the open type cold water solidification heat exchanger, the length direction of the heat exchange fins is vertical, one ends of the heat exchange fins are in contact with a cold water inlet end socket, and the other ends of the heat exchange fins are in contact with the atmosphere.
The open type cold water solidification heat exchanger is characterized in that a plurality of heat exchange fins, inlet guide fins and outlet guide fins are arranged in a refrigerant channel of a heat exchange body of the open type cold water solidification heat exchanger, the length directions of the heat exchange fins are vertical, the length directions of the inlet guide fins and the outlet guide fins are horizontal, the lower end of each heat exchange fin is fixedly connected with one inlet guide fin, the upper end of each heat exchange fin is fixedly connected with one outlet guide fin, a refrigerant inlet seal head is in contact with the inlet guide fins, and a refrigerant outlet seal head is in contact with the outlet guide fins.
The open type cold water solidification heat exchanger comprises a cylinder body, an upper tube plate, a lower tube plate, an upper sealing cover and a heat exchange tube, the upper end of the cylinder is fixedly connected with an upper tube plate in a sealing way, the lower end of the cylinder is fixedly connected with a lower tube plate in a sealing way, the cylinder and the upper tube plate and the lower tube plate which are fixedly connected in the sealing way form a closed cavity, the lower end of the cylinder is an inlet end of a refrigerant, the upper end of the cylinder is an outlet end of the refrigerant, the upper sealing cover is arranged on the upper tube plate and fixedly connected with the upper tube plate, the plurality of heat exchange tubes are arranged in the barrel, two ends of each heat exchange tube are respectively and fixedly connected with the upper tube plate and the lower tube plate in a sealing mode, the upper ends of the heat exchange tubes extend out of the upper tube plate and are communicated with the upper sealing cover, the lower ends of the heat exchange tubes extend out of the lower tube plate and are communicated with the atmosphere, cold water flows from top to bottom in the heat exchange tubes, and when the refrigerant flows from bottom to top in the formed closed cavity, countercurrent heat exchange is carried out on the cold water flowing from top.
The open type cold water solidification heat exchanger is characterized in that a plurality of flow guide partition plates are arranged in a barrel of the open type cold water solidification heat exchanger from bottom to top, one side of each flow guide partition plate is fixedly connected with the barrel, a gap is reserved between the other side of each flow guide partition plate and the barrel, adjacent flow guide partition plates are fixedly connected to two opposite sides of the barrel respectively, and the reserved gaps between the plurality of flow guide partition plates and the barrel form a turn-back type overflowing channel for flowing of a refrigerant.
The refrigerant is ethylene glycol.
The working process of the invention comprises refrigerant cycle heat exchange heating while icing and refrigerant cycle heat exchange heating while deicing, and the specific process is as follows:
1 refrigerant circulating heat exchange heating while freezing
⑴, when the pressure value of the first pressure gauge or the second pressure gauge of the cold water pipeline is lower than a set value a, the corresponding first open type cold water solidification heat exchanger or the second open type cold water solidification heat exchanger exchanges heat and freezes;
⑵ freezing of the first open cold water freezing heat exchanger:
① opening a cold water pipeline, a refrigerant circulating heat exchange loop and a refrigerant circulating loop, opening a first electromagnetic valve, closing an eighth electromagnetic valve, a ninth electromagnetic valve, a tenth electromagnetic valve and an eleventh electromagnetic valve, and cutting off the deicing loop, wherein cold water of a water source enters the cold water pipeline and enters the cold water pipeline from a cold water inlet of the first open type cold water solidification heat exchanger, flows from top to bottom, one part enters the atmosphere through the first open type cold water solidification heat exchanger, and the other part is frozen in the first open type cold water solidification heat exchanger;
② refrigerant flows from bottom to top in the first open type cold water solidification heat exchanger, and is in countercurrent heat exchange with cold water entering the first open type cold water solidification heat exchanger, the temperature is raised, the refrigerant flows out of the first open type cold water solidification heat exchanger, enters the refrigerant circulating heat exchange loop, and enters the refrigerant channel of the evaporator through the first refrigerant pump;
③ the refrigerant entering the evaporator exchanges heat with the refrigerant in the evaporator, the temperature is reduced, the refrigerant flows out of the evaporator and flows back to the first open type cold water solidification heat exchanger;
④ the refrigerant exchanges heat with the refrigerant in the refrigerant channel in the evaporator, is sucked by the compressor after vaporization, and enters the refrigerant channel in the condenser after being discharged out of the compressor, and reduces the temperature after exchanging heat with the heating circulating water, flows out of the condenser, and returns to the evaporator through the throttle valve;
⑤ a heating circulation loop is opened, the heating circulation water enters the heating circulation loop from a heating return pipe, enters the circulation water channel of the condenser through the first electromagnetic valve, exchanges heat with the refrigerant channel of the condenser, flows out of the condenser after the temperature is raised, and returns to the heating system through a heating water supply pipe to supply heat for users;
⑶ icing of the second open cold water freezing heat exchanger:
① opening a cold water pipeline, a refrigerant circulating heat exchange loop and a refrigerant circulating loop, opening a first electromagnetic valve, closing an eighth electromagnetic valve, a ninth electromagnetic valve, a tenth electromagnetic valve and an eleventh electromagnetic valve, and cutting off the deicing loop, wherein cold water of a water source enters the cold water pipeline and enters the cold water pipeline from a cold water inlet of the second open type cold water solidification heat exchanger, flows from top to bottom, one part enters the atmosphere through the second open type cold water solidification heat exchanger, and the other part is frozen in the second open type cold water solidification heat exchanger;
② refrigerant flows from bottom to top in the second open type cold water solidification heat exchanger, and exchanges heat with cold water in the second open type cold water solidification heat exchanger in a countercurrent manner, the temperature is raised to flow out of the second open type cold water solidification heat exchanger, the refrigerant enters the refrigerant circulating heat exchange loop and enters the refrigerant channel of the evaporator through the second refrigerant pump,
③ the refrigerant entering the evaporator exchanges heat with the refrigerant in the evaporator, the temperature is reduced, the refrigerant flows out of the evaporator and flows back to the second open type cold water solidification heat exchanger;
④ the refrigerant exchanges heat with the refrigerant in the refrigerant channel in the evaporator, is sucked by the compressor after vaporization, and enters the refrigerant channel in the condenser after being discharged out of the compressor, and reduces the temperature after exchanging heat with the heating circulating water, flows out of the condenser, and returns to the evaporator through the throttle valve;
⑤ a heating circulation loop is opened, the heating circulation water enters the heating circulation loop from a heating return pipe, enters the circulation water channel of the condenser through the first electromagnetic valve, exchanges heat with the refrigerant channel of the condenser, flows out of the condenser after the temperature is raised, and returns to the heating system through a heating water supply pipe to supply heat for users;
2 deicing and refrigerant circulating heat exchange heating
⑴, the pressure of the cold water pipeline is continuously increased along with the lengthening of the working time of the heat pump system, when the pressure value of the first pressure gauge or the second pressure gauge is higher than a set value b (a < b), the corresponding first open type cold water solidification heat exchanger or the second open type cold water solidification heat exchanger needs to be deiced;
⑵ deicing of the first open cold water freezing heat exchanger:
① closing the second solenoid valve to cut off the first path of cold water pipeline, closing the fourth solenoid valve and the fifth solenoid valve to cut off the first path of refrigerant circulating heat exchange loop, closing the first solenoid valve, opening the eighth solenoid valve and the ninth solenoid valve to open the first path of deicing loop;
② heating circulating water enters into the heating circulating loop from the heating return pipe, enters into the circulating water channel of the condenser through the circulating water channel of the deicing heat exchanger, exchanges heat with the refrigerant channel of the condenser, rises the temperature, flows out of the condenser, returns to the heating system through the heating water supply pipe, and supplies heat for users;
③ the refrigerant flowing out of the first open type cold water solidification heat exchanger enters a first path of deicing loop through a first refrigerant pump, enters a refrigerant channel of the deicing heat exchanger through the first refrigerant pump and an eighth electromagnetic valve, exchanges heat with the heating circulating water entering the circulating water channel of the deicing heat exchanger, rises the temperature, flows out of the deicing heat exchanger, enters the first open type cold water solidification heat exchanger through a ninth electromagnetic valve, flows from bottom to top to deice the first open type cold water solidification heat exchanger, and the ice melted in the first open type cold water solidification heat exchanger flows out from a lower outlet end;
④, after deicing is finished, opening the second electromagnetic valve to open a first path of cold water pipeline, opening the fourth electromagnetic valve and the fifth electromagnetic valve to open a first path of refrigerant circulating heat exchange loop, opening the first electromagnetic valve, and closing the eighth electromagnetic valve and the ninth electromagnetic valve to cut off the first path of deicing loop;
⑤ when the first open type cold water solidification heat exchanger deices, the second open type cold water solidification heat exchanger, the second path of cold water pipeline, the second path of refrigerant circulating heat exchange loop, the second path of refrigerant circulating loop and the heating circulating loop continue to work to heat users;
⑶ second open cold water freezing heat exchanger deicing:
① closing the third solenoid valve to cut off the second path of cold water pipeline, closing the sixth solenoid valve and the seventh solenoid valve to cut off the second path of refrigerant circulation heat exchange loop, closing the first solenoid valve, opening the tenth solenoid valve and the eleventh solenoid valve to open the second path of deicing loop;
② heating circulating water enters into the heating circulating loop from the heating return pipe, enters into the circulating water channel of the condenser through the circulating water channel of the deicing heat exchanger, exchanges heat with the refrigerant channel of the condenser, rises the temperature, flows out of the condenser, returns to the heating system through the heating water supply pipe, and supplies heat for users;
③ the refrigerant flowing out of the second open type cold water solidification heat exchanger enters a second path of deicing loop through a second refrigerant pump, enters a refrigerant channel of the deicing heat exchanger through the second refrigerant pump and a tenth electromagnetic valve, exchanges heat with the heating circulating water entering the circulating water channel of the deicing heat exchanger, rises the temperature, flows out of the deicing heat exchanger, enters the second open type cold water solidification heat exchanger through an eleventh electromagnetic valve, flows from bottom to top to deice the second open type cold water solidification heat exchanger, and the ice melted in the second open type cold water solidification heat exchanger flows out from a lower outlet end;
④, after the deicing is finished, opening the third electromagnetic valve to open the second path of cold water pipeline, opening the sixth electromagnetic valve and the seventh electromagnetic valve to open the second path of refrigerant circulating heat exchange loop, opening the first electromagnetic valve, and closing the tenth electromagnetic valve and the eleventh electromagnetic valve to cut off the second path of deicing loop;
⑤ when the second open type cold water solidification heat exchanger deices, the first open type cold water solidification heat exchanger, the first path of cold water pipeline, the first path of refrigerant circulating heat exchange loop, the first path of refrigerant circulating loop and the heating circulating loop continue to work to heat users;
and 3, after the ice is removed, the pressure of the cold water pipeline is reduced, the pressure value of the first pressure gauge or the second pressure gauge is lower than a set value a (a < b), and the heat pump system is in the process of refrigerant circulation heat exchange heating while freezing again.
Compared with the prior art, the invention has the following beneficial effects:
(1) the cold water solidification heat exchanger provided by the invention has the advantages of compact structure, high heat exchange efficiency, convenience for deicing, easiness in processing and manufacturing and strong practicability;
(2) the invention adopts a mode of combining the hot medium ice melting and the gravity ice removing to remove ice, thereby not only having fast ice removing speed, thorough ice removing, but also having small ice removing power consumption, and having no problems of abrasion of mechanical ice removing, easy equipment damage, difficult maintenance and repair and the like;
(3) the invention can realize the continuous extraction of the solidification heat of cold water to supply heat to the indoor, and the unit can keep high-efficiency and stable operation for a long time.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump system based on an open type cold water freezing heat exchanger in the embodiment 1;
FIG. 2 is a schematic view of the overall structure of a first open type cold water freezing heat exchanger used in embodiment 1;
FIG. 3 is a schematic illustration of FIG. 2 after detachment;
FIG. 4 is a schematic view of the overall structure of a first open type cold water freezing heat exchanger used in embodiment 2;
fig. 5 is a schematic view of the overall structure of the first open type cold water freezing heat exchanger used in embodiment 3.
In the figure: 1 compressor, 2 evaporator, 2-1 refrigerant channel of evaporator, 2-2 refrigerant channel of evaporator, 3 throttle valve, 4 condenser, 4-1 refrigerant channel of condenser, 4-2 circulating water channel of condenser, 5 deicing heat exchanger, 5-1 refrigerant channel of deicing heat exchanger, 5-2 circulating water channel of deicing heat exchanger, 6 fifth pipeline, 7 seventh electromagnetic valve, 8 seventh pipeline, 9 fifth electromagnetic valve, 10 eleventh pipeline, 11 eleventh electromagnetic valve, 12 ninth pipeline, 13 ninth electromagnetic valve, 14 first open type cold water solidification heat exchanger, 14a cold water inlet, 14b refrigerant inlet, 14c refrigerant outlet, 14-1 cold water inlet end enclosure, 14-2 refrigerant inlet end sockets, 14-3 refrigerant outlet end sockets, 14-4 heat exchange bodies, 14-5 sealing strips, 14-6 heat exchange fins, 14-7 inlet guide fins, 14-8 outlet guide fins, 14-9 partition plates, 14-10 upper tube plates, 14-11 lower tube plates, 14-12 upper sealing covers, 14-13 heat exchange tubes, 14-14 cylinders, 14-15 guide partition plates, 15 first pressure gauges, 16 second pipelines, 17 second electromagnetic valves, 18 cold water pumps, 20 third electromagnetic valves, 21 third pipelines, 22 second open type cold water solidification heat exchangers, 22a cold water inlet, 22b refrigerant inlets, 22c refrigerant outlets and 23 second pressure gauges, 24 a first refrigerant pump, 25 a second refrigerant pump, 26 an eighth pipe, 27 an eighth solenoid valve. 28 sixth solenoid valve, 29 sixth conduit, 30 fourth solenoid valve, 31 fourth conduit, 32 tenth solenoid valve, 33 tenth conduit, 34 first solenoid valve, 35 first conduit.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Referring to fig. 1 to 3, in embodiment 1, a refrigerant of a heat pump system based on an open cold water solidification heat exchanger is ethylene glycol, and the heat pump system includes a refrigerant circulation loop, a heating circulation loop, a condenser 4 and an evaporator 2, the refrigerant circulation loop and the heating circulation loop exchange heat with each other through the condenser 4 to heat for user heating, and further includes a cold water pipeline, a refrigerant heat exchange circulation loop, a first open cold water solidification heat exchanger 14, a second open cold water solidification heat exchanger 22, a deicing loop and a deicing heat exchanger 5, the cold water pipeline and the refrigerant heat exchange circulation loop exchange heat with each other through the first open cold water solidification heat exchanger 14 and the second open cold water solidification heat exchanger 22 to heat for a refrigerant, and the refrigerant heat exchange circulation loop and the refrigerant circulation loop exchange heat with each other through the evaporator 2 to heat for a refrigerant temperature rise, the deicing loop and the heating circulation loop are subjected to heat exchange through the deicing heat exchanger 5 to be heated as refrigerants, the heated refrigerants are subjected to heat exchange through the deicing loop and the first open type cold water solidification heat exchanger 14 or the second open type cold water solidification heat exchanger 22 to be deiced, the inlet end of a circulation water channel 4-2 of the condenser is simultaneously communicated with the outlet end of a first pipeline 35 and the outlet end of the circulation water channel 5-2 of the deicing heat exchanger, and a first electromagnetic valve 34 is arranged on the first pipeline 35 and used for cutting off or connecting the deicing heat exchanger 5.
The refrigerant circulation loop of the heat pump system comprises a compressor 1 and a throttle valve 3, wherein an exhaust port of the compressor 1 is communicated with an inlet end of a refrigerant channel 4-1 of a condenser, an outlet end of the refrigerant channel 4-1 of the condenser is communicated with an inlet end of a refrigerant channel 2-1 of an evaporator through the throttle valve 3, and an outlet end of the refrigerant channel 2-1 of the evaporator is communicated with an air suction port of the compressor 1 to form a closed refrigerant circulation loop.
The heating circulation loop of the heat pump system comprises a heating water return pipe and a heating water supply pipe, wherein the heating water return pipe is simultaneously communicated with the inlet end of a circulating water channel 5-2 of the deicing heat exchanger and the inlet end of a first pipeline 35, the heating water supply pipe is communicated with the outlet end of a circulating water channel 4-2 of the condenser, the heating water return pipe, a started first electromagnetic valve 34, the circulating water channel 4-2 of the condenser and the heating water supply pipe form a heating circulation loop in an icing state, and the heating water return pipe, the circulating water channel 5-2 of the deicing heat exchanger, the circulating water channel 4-2 of the condenser and the heating water supply pipe form a heating circulation loop in a deicing state.
The cold water pipeline of the heat pump system comprises a cold water pump 18, a first pressure gauge 15, a second electromagnetic valve 17, a second pressure gauge 23 and a third electromagnetic valve 20, the outlet of the cold water pump 18 is connected with the cold water inlet 14c of the first open type cold water solidification heat exchanger 14 through a second pipeline 16, and is connected with the cold water inlet 22c of the second open type cold water solidification heat exchanger 22 through a third pipeline 21, the inlet of the cold water pump 18 is connected with a water source, and the first pressure gauge 15 and the second electromagnetic valve 17 are sequentially arranged between the cold water inlet 14c of the first open type cold water solidification heat exchanger 14 and the outlet of the cold water pump 18 to form a first cold water pipeline; and a second pressure gauge 23 and a third electromagnetic valve 20 are sequentially arranged between a cold water inlet 22c of the second open type cold water solidification heat exchanger 22 and an outlet of the cold water pump 18 to form a second cold water pipeline.
The refrigerant heat exchange circulation loop of the heat pump system comprises a first refrigerant pump 24, a second refrigerant pump 25, a fourth electromagnetic valve 30, a fifth electromagnetic valve 9, a sixth electromagnetic valve 28 and a seventh electromagnetic valve 7, wherein an inlet of the first refrigerant pump 24 is connected with a refrigerant outlet 14b of the first open type cold water solidification heat exchanger 14, an outlet of the first refrigerant pump 24 is connected with an inlet end of a refrigerant channel 2-2 of the evaporator through a fourth pipeline 31 and the fourth electromagnetic valve 30 thereon, and an outlet end of the refrigerant channel 2-2 of the evaporator is connected with a refrigerant inlet 14a of the first open type cold water solidification heat exchanger 14 through a fifth pipeline 6 and the fifth electromagnetic valve 9 thereon, so that a first path of refrigerant heat exchange circulation loop is formed; an inlet of the second refrigerant pump 25 is connected with a refrigerant outlet 22b of the second open type cold water solidification heat exchanger 22, an outlet of the second refrigerant pump 25 is connected with an inlet end of a refrigerant channel 2-2 of the evaporator through a sixth pipeline 29 and a sixth electromagnetic valve 28 arranged on the sixth pipeline, an outlet end of the refrigerant channel 2-2 of the evaporator is connected with a refrigerant inlet 22a of the second open type cold water solidification heat exchanger 22 through a seventh pipeline 8 and a seventh electromagnetic valve 7 arranged on the seventh pipeline, and a second path of refrigerant heat exchange circulation loop is formed.
The deicing circuit of the heat pump system comprises an eighth electromagnetic valve 27, a ninth electromagnetic valve 13, a tenth electromagnetic valve 32 and an eleventh electromagnetic valve 11, wherein the eighth electromagnetic valve 27 is arranged on an eighth pipeline 26 between the outlet of the first refrigerant pump 24 and the inlet end of a refrigerant channel 5-1 of the deicing heat exchanger, and the ninth electromagnetic valve 13 is arranged on a ninth pipeline 12 between the outlet end of the refrigerant channel 5-1 of the deicing heat exchanger and a refrigerant inlet 14a of the first open type cold water solidification heat exchanger 14 to form a first deicing circuit; the tenth electromagnetic valve 32 is arranged on a tenth pipeline 33 between the outlet of the second refrigerant pump 25 and the inlet end of the refrigerant channel 5-1 of the deicing heat exchanger, and the eleventh electromagnetic valve 11 is arranged on an eleventh pipeline 10 between the outlet end of the refrigerant channel 5-1 of the deicing heat exchanger and the refrigerant inlet 22a of the second open type cold water solidification heat exchanger 22, so that a second deicing loop is formed.
The first open type cold water solidification heat exchanger 14 for the heat pump system based on the open type cold water solidification heat exchanger comprises a heat exchange body 14-4, a cold water inlet end socket 14-1, a refrigerant inlet end socket 14-2 and a refrigerant outlet end socket 14-3, wherein the heat exchange body 14-4 comprises a cold water channel and a refrigerant channel, the cold water channels and the refrigerant channel are alternately arranged, the cold water inlet end socket 14-1 is arranged right above the heat exchange body 14-4 and is tightly contacted with the heat exchange body, the cold water inlet end socket 14-1 is communicated with the inlet end of the cold water channel, the outlet end of the cold water channel is communicated with the atmosphere, and cold water flows from top to bottom in the cold water channel; the refrigerant inlet end socket 14-2 and the refrigerant outlet end socket 14-3 are respectively arranged at the lowest end and the uppermost end of the side surface of the heat exchanger 14-4 and are tightly contacted with the heat exchanger 14-4, the refrigerant inlet end socket 14-2 is communicated with the inlet end of the refrigerant channel, the refrigerant outlet end socket 14-3 is communicated with the outlet end of the refrigerant channel, and the refrigerant flows from bottom to top in the refrigerant channel and simultaneously carries out countercurrent heat exchange with cold water flowing from top to bottom through the partition plate 14-9.
The cold water channel of the heat exchange body 14-4 comprises partition plates 14-9 and sealing strips 14-5, two adjacent partition plates 14-9 are fixedly connected through the sealing strips 14-5 at the left end and the right end, and the upper end of the cold water channel is an inlet end and the lower end of the cold water channel is an outlet end.
The refrigerant channel of the heat exchange body 14-4 comprises partition plates 14-9 and sealing strips 14-5, two adjacent partition plates 14-9 are fixedly connected through the sealing strips 14-5 at the upper, lower, left and right ends, and the lower end of the refrigerant channel is an inlet end and the upper end is an outlet end.
A plurality of heat exchange fins 14-6 are arranged in a cold water channel of the heat exchange body 14-4 of the first open type cold water solidification heat exchanger 14, the length direction of the heat exchange fins 14-6 is a vertical direction, one end of each heat exchange fin 14-6 is in contact with the cold water inlet end socket 14-1, and the other end of each heat exchange fin is in contact with the atmosphere.
A plurality of heat exchange fins 14-6, inlet guide fins 14-7 and outlet guide fins 14-8 are arranged in a refrigerant channel of the heat exchanger 14-4 of the first open type cold water solidification heat exchanger 14, the length direction of the heat exchange fins 14-6 is a vertical direction, the length directions of the inlet guide fins 14-7 and the outlet guide fins 14-8 are both a horizontal direction, the lower end of each heat exchange fin 14-6 is fixedly connected with one inlet guide fin 14-7, the upper end of each heat exchange fin is fixedly connected with one outlet guide fin 14-8, a refrigerant inlet end socket 14-2 is in contact with the inlet guide fin 14-7, and a refrigerant outlet end socket 14-3 is in contact with the outlet guide fins 14-8.
The second open cold water freezing heat exchanger 22 for the heat pump system based on the open cold water freezing heat exchanger is identical to the first open cold water freezing heat exchanger 14.
The compressor 1, the evaporator 2, the throttle valve 3, the condenser 4, the deicing heat exchanger 5, the cold water pump 18, the first refrigerant pump 24, the second refrigerant pump 25 and various electromagnetic valves are all commercially available products in the prior art.
The working process of this embodiment is refrigerant circulation heat transfer heating when freezing and refrigerant circulation heat transfer heating when deicing, and concrete process is:
1 refrigerant circulating heat exchange heating while freezing
⑴ when the pressure value of the first pressure gauge 15 or the second pressure gauge 23 of the cold water pipeline is lower than the set value a, the corresponding first open type cold water freezing heat exchanger 14 or the second open type cold water freezing heat exchanger 22 exchanges heat and freezes;
⑵ freezing of the first open cold water freezing heat exchanger 14:
① opening a cold water pipeline, a refrigerant circulating heat exchange loop and a refrigerant circulating loop, opening the first electromagnetic valve 34, closing the eighth electromagnetic valve 27, the ninth electromagnetic valve 13, the tenth electromagnetic valve 32 and the eleventh electromagnetic valve 11, and cutting off the deicing loop, wherein the cold water of the water source enters the cold water pipeline and enters the cold water pipeline from the cold water inlet 14c of the first open type cold water solidification heat exchanger 14, flows from top to bottom, one part enters the atmosphere through the first open type cold water solidification heat exchanger 14, and the other part is frozen in the first open type cold water solidification heat exchanger 14;
② refrigerant flows from bottom to top in the first open type cold water solidification heat exchanger 14, performs countercurrent heat exchange with the cold water entering the first open type cold water solidification heat exchanger, increases the temperature, flows out of the first open type cold water solidification heat exchanger, enters the refrigerant circulating heat exchange loop, and enters the refrigerant channel 2-2 of the evaporator 2 through the first refrigerant pump 24;
③ the refrigerant entering the evaporator 2 exchanges heat with the refrigerant in the evaporator 2, the temperature is reduced, the refrigerant flows out of the evaporator 2, and flows back to the first open type cold water freezing heat exchanger 14;
④ the refrigerant exchanges heat with the refrigerant in the refrigerant channel 2-1 of the evaporator, after being vaporized, the refrigerant is sucked by the compressor 1, and is discharged from the compressor 1, then enters the refrigerant channel 4-1 of the condenser, after exchanging heat with the heating circulating water, the temperature is reduced, and the refrigerant flows out of the condenser 4, and returns to the evaporator 2 through the throttle valve 3;
⑤, a heating circulation loop is opened, heating circulation water enters the heating circulation loop from a heating water return pipe, enters a circulation water channel 4-2 of the condenser through the first electromagnetic valve 34, exchanges heat with a refrigerant channel 4-1 of the condenser, flows out of the condenser 4 after the temperature is raised, and returns to a heating system through a heating water supply pipe to supply heat to users;
⑶ freezing of the second open cold water freezing heat exchanger 22:
①, opening a cold water pipeline, a refrigerant circulating heat exchange loop and a refrigerant circulating loop, opening the first electromagnetic valve 34, closing the eighth electromagnetic valve 27, the ninth electromagnetic valve 13, the tenth electromagnetic valve 32 and the eleventh electromagnetic valve 11, and cutting off the deicing loop, wherein cold water of a water source enters the cold water pipeline and enters the cold water pipeline from the cold water inlet 22c of the second open type cold water solidification heat exchanger 22, flows from top to bottom, one part enters the atmosphere through the second open type cold water solidification heat exchanger 22, and the other part is frozen in the second open type cold water solidification heat exchanger 22;
② refrigerant flows from bottom to top in the second open type cold water solidification heat exchanger 22, and countercurrent heat exchange is carried out with the cold water entering the second open type cold water solidification heat exchanger, the temperature is raised to flow out of the second open type cold water solidification heat exchanger, the refrigerant enters the refrigerant circulating heat exchange loop, enters the refrigerant channel 2-2 of the evaporator through the second refrigerant pump 25,
③ the refrigerant entering the evaporator 2 exchanges heat with the refrigerant in the evaporator 2, the temperature is reduced, the refrigerant flows out of the evaporator 2 and flows back to the second open type cold water freezing heat exchanger 22;
④ the refrigerant exchanges heat with the refrigerant in the refrigerant channel 2-1 of the evaporator, after being vaporized, the refrigerant is sucked by the compressor 1, and is discharged from the compressor 1, then enters the refrigerant channel 4-1 of the condenser, after exchanging heat with the heating circulating water, the temperature is reduced, and the refrigerant flows out of the condenser 4, and returns to the evaporator 2 through the throttle valve 3;
⑤, a heating circulation loop is opened, heating circulation water enters the heating circulation loop from a heating water return pipe, enters a circulation water channel 4-2 of the condenser through the first electromagnetic valve 34, exchanges heat with a refrigerant channel 4-1 of the condenser, flows out of the condenser 4 after the temperature is raised, and returns to a heating system through a heating water supply pipe to supply heat to users;
2 deicing and refrigerant circulating heat exchange heating
⑴, the pressure of the cold water pipeline is continuously increased along with the lengthening of the working time of the heat pump system, when the pressure value of the first pressure gauge 15 or the second pressure gauge 23 is higher than a set value b (a < b), the corresponding first open type cold water solidification heat exchanger 14 or the second open type cold water solidification heat exchanger 22 needs to be deiced;
⑵ first open cold water freezing heat exchanger 14, to remove ice:
① closing the second solenoid valve 17 to cut off the first path of cold water pipeline, closing the fourth solenoid valve 30 and the fifth solenoid valve 9 to cut off the first path of refrigerant circulation heat exchange loop, closing the first solenoid valve 34, opening the eighth solenoid valve 27 and the ninth solenoid valve 13 to open the first path of deicing loop;
② heating circulating water enters a heating circulating loop from a heating water return pipe, enters a circulating water channel 4-2 of a condenser through a circulating water channel 5-2 of a deicing heat exchanger, exchanges heat with a refrigerant channel 4-1 of the condenser, flows out of the condenser 4 after the temperature is raised, and returns to a heating system through a heating water supply pipe to supply heat to users;
③ the refrigerant flowing out of the first open type cold water solidification heat exchanger 14 enters a first deicing loop through the first refrigerant pump 24, enters the refrigerant channel 5-1 of the deicing heat exchanger through the first refrigerant pump 24 and the eighth electromagnetic valve 27, exchanges heat with the heating circulating water entering the circulating water channel 5-2 of the deicing heat exchanger, rises the temperature, flows out of the deicing heat exchanger 5, enters the first open type cold water solidification heat exchanger 14 through the ninth electromagnetic valve 13, flows from bottom to top to deice the first open type cold water solidification heat exchanger 14, and the ice melted in the first open type cold water solidification heat exchanger 14 flows out from the outlet end at the lower part;
④, after the deicing is finished, opening the second solenoid valve 17 to open a first path of cold water pipeline, opening the fourth solenoid valve 30 and the fifth solenoid valve 9 to open a first path of cold water circulating heat exchange loop, opening the first solenoid valve 34, and closing the eighth solenoid valve 27 and the ninth solenoid valve 13 to cut off the first path of deicing loop;
⑤ when the first open type cold water solidification heat exchanger 14 is used for deicing, the second open type cold water solidification heat exchanger 22, the second cold water pipeline, the second refrigerant circulating heat exchange loop, the second refrigerant circulating loop and the heating circulating loop continue to work for heating users;
⑶ second open cold water freezing heat exchanger 22 deicing:
① closing the third solenoid valve 20 to cut off the second path of cold water circuit, closing the sixth solenoid valve 28 and the seventh solenoid valve 7 to cut off the second path of refrigerant circulation heat exchange circuit, closing the first solenoid valve 34, opening the tenth solenoid valve 32 and the eleventh solenoid valve 11 to open the second path of deicing circuit;
② heating circulating water enters a heating circulating loop from a heating water return pipe, enters a circulating water channel 4-2 of a condenser through a circulating water channel 5-2 of a deicing heat exchanger, exchanges heat with a refrigerant channel 4-1 of the condenser, flows out of the condenser 4 after the temperature is raised, and returns to a heating system through a heating water supply pipe to supply heat to users;
③ the refrigerant flowing out of the second open type cold water solidification heat exchanger 22 enters a second path of deicing loop through the second refrigerant pump 25, enters the refrigerant channel 5-1 of the deicing heat exchanger through the second refrigerant pump 25 and the tenth electromagnetic valve 32, exchanges heat with the heating circulating water entering the circulating water channel 5-2 of the deicing heat exchanger, rises the temperature, flows out of the deicing heat exchanger 5, enters the second open type cold water solidification heat exchanger 22 through the eleventh electromagnetic valve 11, flows from bottom to top to deice the second open type cold water solidification heat exchanger 22, and the ice melted in the second open type cold water solidification heat exchanger 22 flows out from the outlet end at the lower part;
④, after the deicing is finished, opening the third solenoid valve 20 to open the second path of cold water circuit, opening the sixth solenoid valve 28 and the seventh solenoid valve 7 to open the second path of cold water circulating heat exchange circuit, opening the first solenoid valve 34, and closing the tenth solenoid valve 32 and the eleventh solenoid valve 11 to cut off the second path of deicing circuit;
⑤ when the second open type cold water solidification heat exchanger 22 is used for deicing, the first open type cold water solidification heat exchanger 14, the first cold water pipeline, the first refrigerant circulating heat exchange loop, the first refrigerant circulating loop and the heating circulating loop continue to work for heating users;
3 after deicing, the pressure of the cold water pipeline is reduced, the pressure value of the first pressure gauge 15 or the second pressure gauge 23 is lower than a set value a (a < b), and the heat pump system is in the process of refrigerant circulation heat exchange heating while icing again.
Referring to fig. 1, 4, embodiment 2, the heat pump system based on the open type cold water freezing heat exchanger of this embodiment 2 has substantially the same structure and work flow as the heat pump system based on the open type cold water freezing heat exchanger of embodiment 1, except that the structure of the open type cold water freezing heat exchanger is different, and the structure of the first open type cold water freezing heat exchanger 14 is: the heat exchanger comprises a cylinder 14-14, an upper tube plate 14-10, a lower tube plate 14-11, an upper sealing cover 14-12 and heat exchange tubes 14-13, wherein the upper end of the cylinder 14-14 is fixedly connected with the upper tube plate 14-10 in a sealing manner, the lower end of the cylinder 14-14 is fixedly connected with the lower tube plate 14-11 in a sealing manner, the cylinder 14-14 and the upper tube plate 14-10 and the lower tube plate 14-11 which are fixedly connected in a sealing manner form a closed cavity, the lower end of the cylinder 14-14 is an inlet end of a refrigerant, the upper end of the cylinder 14-14 is an outlet end of the refrigerant, the upper sealing cover 14-12 is arranged on the upper tube plate 14-10 and fixedly connected with the upper tube plate 14-10, the plurality of heat exchange tubes 14-13 are arranged in the cylinder 14-14, two ends of the heat exchange tubes are respectively fixedly connected with the upper, The heat exchange tube is communicated with the upper sealing cover 14-12, the lower end of the heat exchange tube 14-13 extends out of the lower tube plate 14-11 and is communicated with the atmosphere, cold water flows from top to bottom in the heat exchange tube 14-13, and the refrigerant flows from bottom to top in the formed closed cavity and simultaneously carries out countercurrent heat exchange with the cold water flowing from top to bottom through the heat exchange tube 14-13.
The second open cold water freezing heat exchanger 22 for the heat pump system based on the open cold water freezing heat exchanger is identical to the first open cold water freezing heat exchanger 14.
Referring to fig. 1, 5 and 3, the heat pump system based on the open cold water freezing heat exchanger of the embodiment 3 has the same structure and work flow as the heat pump system based on the open cold water freezing heat exchanger of the embodiment 2, except that the structure of the open cold water freezing heat exchanger is different, and the structure of the first open cold water freezing heat exchanger 14 is: a plurality of flow guide partition plates 14-15 are arranged in a cylinder 14-14 of the open type cold water solidification heat exchanger from bottom to top, one side of each flow guide partition plate 14-15 is fixedly connected with the cylinder 14-14, a gap is reserved between the other side of each flow guide partition plate 14-14 and the cylinder 14-14, the adjacent flow guide partition plates 14-15 are fixedly connected to two opposite sides of the cylinder 14-14 respectively, and the gaps reserved between the plurality of flow guide partition plates 14-15 and the cylinder 14-14 form a return type overflowing channel for flowing of a refrigerant.
Claims (7)
1. A heat pump system based on an open cold water solidification heat exchanger comprises a refrigerant circulation loop, a heating circulation loop, a condenser and an evaporator, wherein the refrigerant circulation loop and the heating circulation loop exchange heat through the condenser to heat for user heating, and is characterized by further comprising a cold water pipeline, a refrigerant heat exchange circulation loop, a first open cold water solidification heat exchanger, a second open cold water solidification heat exchanger, a deicing loop and a deicing heat exchanger, wherein the cold water pipeline and the refrigerant heat exchange circulation loop exchange heat through the first open cold water solidification heat exchanger and the second open cold water solidification heat exchanger to heat for refrigerants, the refrigerant heat exchange circulation loop and the refrigerant circulation loop exchange heat through the evaporator to heat for refrigerants, the deicing loop and the heating circulation loop exchange heat through the deicing heat exchanger to heat for refrigerants, the heated refrigerant is subjected to heat exchange with the first open type cold water solidification heat exchanger or the second open type cold water solidification heat exchanger in the deicing loop to be deiced, the inlet end of a circulating water channel in the condenser is simultaneously communicated with the outlet end of the first pipeline and the outlet end of the circulating water channel in the deicing heat exchanger, and the first electromagnetic valve is arranged on the first pipeline and used for cutting off or connecting the deicing heat exchanger;
the refrigerant circulation loop of the heat pump system comprises a compressor and a throttle valve, wherein an exhaust port of the compressor is communicated with an inlet end of a refrigerant channel in a condenser, an outlet end of the refrigerant channel in the condenser is communicated with an inlet end of a refrigerant channel in an evaporator through the throttle valve, and an outlet end of the refrigerant channel in the evaporator is communicated with an air suction port of the compressor to form a closed refrigerant circulation loop;
the heating circulation loop of the heat pump system comprises a heating water return pipe and a heating water supply pipe, the heating water return pipe is simultaneously communicated with the inlet end of a circulating water channel in the deicing heat exchanger and the inlet end of a first pipeline, the heating water supply pipe is communicated with the outlet end of a circulating water channel in the condenser, the heating water return pipe, the started first electromagnetic valve, the circulating water channel in the condenser and the heating water supply pipe form a heating circulation loop in an icing state, and the heating water return pipe, the circulating water channel in the deicing heat exchanger, the circulating water channel in the condenser and the heating water supply pipe form a heating circulation loop in a refrigerant deicing state;
the cold water pipeline of the heat pump system comprises a cold water pump, a first pressure gauge, a second electromagnetic valve, a second pressure gauge and a third electromagnetic valve, wherein the outlet of the cold water pump is simultaneously connected with the cold water inlet of the first open type cold water solidification heat exchanger and the cold water inlet of the second open type cold water solidification heat exchanger, the inlet of the cold water pump is connected with a water source, and the first pressure gauge and the second electromagnetic valve are sequentially arranged between the cold water inlet of the first open type cold water solidification heat exchanger and the outlet of the cold water pump to form a first cold water pipeline; a second pressure gauge and a third electromagnetic valve are sequentially arranged between a cold water inlet of the second open type cold water solidification heat exchanger and an outlet of the cold water pump to form a second path of cold water pipeline;
the refrigerant heat exchange circulation loop of the heat pump system comprises a first refrigerant pump, a second refrigerant pump, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve and a seventh electromagnetic valve, wherein an inlet of the first refrigerant pump is connected with a refrigerant outlet of the first open type cold water solidification heat exchanger, an outlet of the first refrigerant pump is connected with an inlet end of a refrigerant channel in the evaporator through the fourth electromagnetic valve, and an outlet end of the refrigerant channel in the evaporator is connected with the refrigerant inlet of the first open type cold water solidification heat exchanger through the fifth electromagnetic valve to form a first path of refrigerant heat exchange circulation loop; an inlet of the second refrigerant pump is connected with a refrigerant outlet of the second open type cold water solidification heat exchanger, an outlet of the second refrigerant pump is connected with an inlet end of a refrigerant channel in the evaporator through a sixth electromagnetic valve, and an outlet end of the refrigerant channel in the evaporator is connected with a refrigerant inlet of the second open type cold water solidification heat exchanger through a seventh electromagnetic valve to form a second path of refrigerant heat exchange circulation loop;
the deicing loop of the heat pump system comprises an eighth electromagnetic valve, a ninth electromagnetic valve, a tenth electromagnetic valve and an eleventh electromagnetic valve, wherein the eighth electromagnetic valve is arranged between the outlet end of the first refrigerant pump and the inlet end of a refrigerant channel in the deicing heat exchanger, and the ninth electromagnetic valve is arranged between the outlet end of the refrigerant channel in the deicing heat exchanger and the refrigerant inlet of the first open type cold water solidification heat exchanger to form a first deicing loop; the tenth electromagnetic valve is arranged between the outlet end of the second refrigerant pump and the inlet end of the refrigerant channel in the deicing heat exchanger, and the eleventh electromagnetic valve is arranged between the outlet end of the refrigerant channel in the deicing heat exchanger and the refrigerant inlet of the second open type cold water solidification heat exchanger, so that a second deicing loop is formed.
2. The heat pump system based on the open type cold water freezing heat exchanger as claimed in claim 1, characterized in that: the second electromagnetic valve and the third electromagnetic valve of the heat pump system are replaced by a first electric three-way valve, the fourth electromagnetic valve and the sixth electromagnetic valve are replaced by a second electric three-way valve, and the fifth electromagnetic valve and the seventh electromagnetic valve are replaced by a third electric three-way valve; the eighth electromagnetic valve and the tenth electromagnetic valve are replaced by a fourth electric three-way valve; and the ninth electromagnetic valve and the eleventh electromagnetic valve are replaced by a fifth electric three-way valve.
3. The open cold water freezing heat exchanger for the heat pump system based on the open cold water freezing heat exchanger as claimed in claim 1, wherein: the open type cold water solidification heat exchanger comprises a heat exchange body, a cold water inlet end socket, a refrigerant inlet end socket and a refrigerant outlet end socket, wherein the heat exchange body comprises a cold water channel and a refrigerant channel, the cold water channels and the refrigerant channel are alternately arranged, the cold water inlet end socket is arranged right above the heat exchange body and is tightly contacted with the heat exchange body, the cold water inlet end socket is communicated with the inlet end of the cold water channel, the outlet end of the cold water channel is communicated with the atmosphere, and cold water flows from top to bottom in the cold water channel; the refrigerant inlet end socket and the refrigerant outlet end socket are respectively arranged at the lowest end and the uppermost end of the side face of the heat exchange body and are in close contact with the heat exchange body, the refrigerant inlet end socket is communicated with the inlet end of the refrigerant channel, the refrigerant outlet end socket is communicated with the outlet end of the refrigerant channel, and the refrigerant is in countercurrent heat exchange with cold water flowing from top to bottom through the partition plate while flowing from bottom to top in the refrigerant channel.
4. The open cold water freezing heat exchanger for the heat pump system based on the open cold water freezing heat exchanger as claimed in claim 3, wherein: the cold water channel comprises partition plates and sealing strips, every two adjacent partition plates are fixedly connected through the sealing strips at the left end and the right end, the upper end of the cold water channel is an inlet end, and the lower end of the cold water channel is an outlet end.
5. The open cold water freezing heat exchanger for the heat pump system based on the open cold water freezing heat exchanger as claimed in claim 3, wherein: the refrigerant channel comprises partition plates and sealing strips, every two adjacent partition plates are fixedly connected through the sealing strips at the upper end, the lower end, the left end and the right end, and the lower end and the upper end of the refrigerant channel are inlet ends and outlet ends respectively.
6. An open cold water freezing heat exchanger for a heat pump system based on the open cold water freezing heat exchanger according to claim 3 or 4, characterized in that: a plurality of heat exchange fins are arranged in a cold water channel of a heat exchange body of the open type cold water solidification heat exchanger, the length direction of the heat exchange fins is vertical, one ends of the heat exchange fins are in contact with a cold water inlet end socket, and the other ends of the heat exchange fins are in contact with the atmosphere.
7. An open cold water freezing heat exchanger for a heat pump system based on the open cold water freezing heat exchanger according to claim 3 or 5, characterized in that: the open type cold water solidification heat exchanger is characterized in that a plurality of heat exchange fins, inlet guide fins and outlet guide fins are arranged in a refrigerant channel of a heat exchange body of the open type cold water solidification heat exchanger, the length directions of the heat exchange fins are vertical, the length directions of the inlet guide fins and the outlet guide fins are horizontal, the lower end of each heat exchange fin is fixedly connected with one inlet guide fin, the upper end of each heat exchange fin is fixedly connected with one outlet guide fin, a refrigerant inlet seal head is in contact with the inlet guide fins, and a refrigerant outlet seal head is in contact with the outlet guide fins.
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| CN110849098A (en) * | 2019-12-02 | 2020-02-28 | 佛山铠耐空调设备有限公司 | Two-stage heat exchange drying unit |
| CN112361657A (en) * | 2020-11-12 | 2021-02-12 | 青岛大学 | Novel water source phase change heat exchange device and heat pump system |
| CN112378129A (en) * | 2020-12-02 | 2021-02-19 | 珠海格力电器股份有限公司 | Water chilling unit and control method thereof |
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| CN1800749A (en) * | 2006-01-12 | 2006-07-12 | 哈尔滨工业大学 | solidification latent heat type heat pump utilizing low-level heat source water supply sensible heat to defrost |
| CN1800746A (en) * | 2006-01-12 | 2006-07-12 | 哈尔滨工业大学 | Collection device for cold water solidification heat |
| CN106152612A (en) * | 2016-08-22 | 2016-11-23 | 青岛科创蓝新能源股份有限公司 | A kind of heat pump heating and cooling system extracting heat of solidification or ice making |
-
2018
- 2018-01-08 CN CN201810014734.3A patent/CN108387030B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19839867A1 (en) * | 1998-09-02 | 2000-05-11 | Franz Hegele | Heat pump for buildings has ice making and storage unit using water and glycol fluid medium to separate ice sheet from evaporator plate |
| CN1800749A (en) * | 2006-01-12 | 2006-07-12 | 哈尔滨工业大学 | solidification latent heat type heat pump utilizing low-level heat source water supply sensible heat to defrost |
| CN1800746A (en) * | 2006-01-12 | 2006-07-12 | 哈尔滨工业大学 | Collection device for cold water solidification heat |
| CN106152612A (en) * | 2016-08-22 | 2016-11-23 | 青岛科创蓝新能源股份有限公司 | A kind of heat pump heating and cooling system extracting heat of solidification or ice making |
Non-Patent Citations (1)
| Title |
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| 新型采集凝固热热泵技术及系统综合供热性能分析;钱剑峰等;《大连理工大学学报》;20110331;第51卷(第2期);244-249 * |
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|---|---|
| CN108387030A (en) | 2018-08-10 |
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