CN113566452A - Cold water phase change energy and air source coupling heat pump system - Google Patents
Cold water phase change energy and air source coupling heat pump system Download PDFInfo
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- CN113566452A CN113566452A CN202110919753.2A CN202110919753A CN113566452A CN 113566452 A CN113566452 A CN 113566452A CN 202110919753 A CN202110919753 A CN 202110919753A CN 113566452 A CN113566452 A CN 113566452A
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
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Abstract
A cold water phase change energy and air source coupling heat pump system belongs to the technical field of energy. The tail end water supply main pipe and the tail end water return main pipe are communicated with the phase-change energy heat pump unit, and the intermediate water supply main pipe is communicated with the phase-change energy heat pump unit and a second phase-change intermediate water supply branch pipe; the second phase-change intermediate water supply branch pipe is communicated with the second phase-change machine, and the intermediate water return main pipe is communicated with the phase-change energy heat pump unit and the second phase-change intermediate water return branch pipe; the first phase-change intermediate backwater branch pipe and the second phase-change intermediate backwater branch pipe are communicated with a first phase-change machine and a second phase-change intermediate backwater branch pipe; the first phase-change ice-melting water return branch pipe and the second phase-change intermediate water return branch pipe are communicated, the ice-melting water supply main pipe is communicated with the plate heat exchanger and the first phase-change ice-melting water supply branch pipe and the second phase-change ice-melting water supply branch pipe are communicated, and the hot water supply and return pipelines are communicated between the plate heat exchanger and the heat storage water tank. The invention is used for supplying heat to buildings.
Description
Technical Field
The invention belongs to the technical field of energy, and particularly relates to a heat pump system with cold water phase change energy and air source coupling for supplying heat by clean energy.
Background
The heat pump technology is adopted to extract low-grade clean energy for heating and refrigerating buildings, so that the energy-saving, emission-reducing and economic benefits are great, and particularly the water source heat pump technology is widely applied.
However, the application of the conventional water source heat pump is limited by the water amount, and can only be applied to areas with rich water resources (sewage, seawater, river and lake water, and the like). In addition, the conventional water source heat pump is limited by water temperature, when the water source temperature is lower than 3 ℃, the icing phenomenon can occur in the evaporator of the heat pump unit, the heat exchange efficiency is influenced, and the copper pipe can be frozen and cracked. Therefore, the application of the conventional water source heat pump has a large limitation.
The cold water phase-change energy heat pump supplies heat to the building by extracting the phase-change latent heat in the cold water, the water source consumption is obviously reduced compared with the conventional water source heat pump, and if the conventional water source heat pump is applied, the water consumption of the cold water phase-change energy heat pump is only 1/16 according to the temperature drop of the water source at 5 ℃. In addition, the cold water phase-change energy heat pump system utilizes the phase-change latent heat of cold water, and can still normally operate when the water temperature is close to 0 ℃ in extremely cold weather. Therefore, the cold water phase change energy heat pump has wider application prospect. However, the cold water phase change energy heat pump technology still needs to solve the problems of excessive ice melting energy consumption and poor ice melting effect in the application process.
The utility model patent with the application number of '201621417002.1', the name of 'a solar energy ice source heat pump heating system' adopts solar energy to melt ice, but solar energy utilizes the limitation big, and is not good at continuous overcast and rainy weather and night effect.
The invention has the application number of '201810748604.2', and is named as 'a cold water phase change machine and heat pump system', and the invention patent application utilizes the heat of the hot water at the tail end to remove ice, when the system runs to the ice melting stage, a part of the water at the tail end is bypassed to the plate heat exchanger, the hot water at the tail end exchanges heat with the intermediate water of the phase change machine, and the heat at the tail end is utilized to melt and remove ice, thus, although the purpose of melting ice is achieved, a part of the heat at the tail end is consumed, the temperature of the return water supplied from the tail end can be greatly reduced in the ice melting process, the temperature of the return water supplied from the tail end fluctuates periodically and greatly, the ice melting temperature is unstable, the ice melting effect is poor, and the heat at the tail end is wasted.
Disclosure of Invention
The invention aims to provide a cold water phase-change energy and air source coupling heat pump system to solve the problem of poor ice melting effect of the cold water phase-change energy heat pump system.
According to the invention, the phase change energy heat pump unit and the air source heat pump are reasonably configured, on one hand, one phase change energy heat pump unit corresponds to two (sets of) phase change machines, and the cold water phase change energy heat pump unit can continuously operate under the configuration, wherein when one (set of) phase change machine melts ice, the other (set of) phase change machine is switched to freeze, and the system does not need to be stopped in the operation process, so that the continuity of the heat supply effect of the system is ensured; on the other hand, a cold water phase change energy heat pump system (the cold water phase change energy and air source coupling heat pump system is characterized in that an air source heat pump unit is added on the basis of the cold water phase change energy heat pump system) is coupled with the air source heat pump system, the air source heat pump serves as an ice melting heat source of the cold water phase change energy heat pump system and also serves as an auxiliary heat source system of the cold water phase change energy heat pump system, the machine is multifunctional, and stability, comfort and high efficiency of the heat supply effect of the whole system are guaranteed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cold water phase change energy and air source coupling heat pump system comprises a phase change energy heat pump unit, a first phase change machine, a second phase change machine, a plate heat exchanger, a heat storage water tank, a tail end water supply main pipe, a tail end water return main pipe, an intermediate water supply main pipe, an intermediate water return main pipe, a first phase change intermediate water supply branch pipe, a first phase change intermediate water return branch pipe, a second phase change intermediate water supply branch pipe, a second phase change intermediate water return branch pipe and an ice melting water return main pipe, the system comprises an ice melting and water supplying main pipe, a first phase change ice melting and water supplying branch pipe, a first phase change ice melting and water returning branch pipe, a second phase change ice melting and water supplying branch pipe, a second phase change ice melting and water returning branch pipe, a hot water returning pipeline, a hot water supplying pipeline, a temperature controller, an air source hot water returning pipe, an air source hot water supplying pipe, an air source water supplying main pipe, an air source water returning main pipe, an air source tail end water supplying branch pipe, an air source tail end water returning branch pipe and an air source heat pump;
the tail end water supply main pipe and the tail end water return main pipe are communicated with the phase-change energy heat pump unit, one end of the intermediate water supply main pipe is communicated with the phase-change energy heat pump unit, and the other end of the intermediate water supply main pipe is communicated with the first phase-change intermediate water supply branch pipe and the second phase-change intermediate water supply branch pipe; the first phase change intermediary water supply branch pipe is communicated with the first phase change machine, and the second phase change intermediary water supply branch pipe is communicated with the second phase change machine; one end of the intermediate water return main pipe is communicated with the phase-change energy heat pump unit, and the other end of the intermediate water return main pipe is communicated with the first phase-change intermediate water return branch pipe and the second phase-change intermediate water return branch pipe; the first phase change intermediate backwater branch pipe is communicated with a first phase change machine, and the second phase change intermediate backwater branch pipe is communicated with a second phase change machine;
one end of the ice melting backwater main pipe is communicated with the plate type heat exchanger, and the other end of the ice melting backwater main pipe is communicated with the first phase change ice melting backwater branch pipe and the second phase change ice melting backwater branch pipe; the first phase change ice melting backwater branch pipe is communicated with the first phase change intermediary backwater branch pipe, and the second phase change ice melting backwater branch pipe is communicated with the second phase change intermediary backwater branch pipe; one end of the ice melting and water supplying main pipe is communicated with the plate type heat exchanger, and the other end of the ice melting and water supplying main pipe is communicated with the first phase change ice melting and water supplying branch pipe and the second phase change ice melting and water supplying branch pipe; the first phase change ice melting water supply branch pipe is communicated with the first phase change intermediary water supply branch pipe, and the second phase change ice melting water supply branch pipe is communicated with the second phase change intermediary water supply branch pipe; the hot water return pipeline and the hot water supply pipeline are communicated and arranged between the plate heat exchanger and the heat storage water tank;
the temperature controller is arranged on the heat storage water tank; the air source hot water supply pipe is communicated between the heat storage water tank and the air source water supply main pipe, and the air source hot water return pipe is communicated between the heat storage water tank and the air source water return main pipe; the air source water supply main pipe is communicated with the air source heat pump and the air source tail end water supply branch pipe, the air source water return main pipe is communicated with the air source heat pump and the air source tail end water return branch pipe, the air source tail end water supply branch pipe is communicated with the tail end water supply main pipe, and the air source tail end water return branch pipe is communicated with the tail end water return main pipe.
Further, the cold water phase change energy and air source coupling heat pump system further comprises a tail end pump, an intermediate pump, an ice melting pump, a hot water circulating pump and an air source circulating pump; the ice melting system is characterized in that the tail end pump is connected to the tail end water return main pipe, the medium pump is connected to the medium water return main pipe, the ice melting pump is connected to the ice melting water return main pipe, the hot water circulating pump is connected to a hot water return line, and the air source circulating pump is connected to an air source hot water return pipe.
Further, the cold water phase change energy and air source coupling heat pump system further comprises an air source tail end water return switching valve, an air source tail end water supply switching valve, an air source hot water return switching valve and an air source hot water supply switching valve; the air source terminal backwater switching valve is connected to the air source terminal backwater branch pipe, the air source terminal water supply switching valve is connected to the air source terminal water supply branch pipe, the air source hot water backwater switching valve is connected to the air source hot water return pipe, and the air source hot water supply switching valve is connected to the air source hot water supply pipe.
The cold water phase-change energy and air source coupling heat pump system further comprises a first phase-change intermediary water supply switching valve, a first phase-change intermediary water return switching valve, a second phase-change intermediary water supply switching valve, a second phase-change intermediary water return switching valve, a first phase-change ice-melting water supply switching valve, a first phase-change ice-melting water return switching valve, a second phase-change ice-melting water supply switching valve and a second phase-change ice-melting water return switching valve; the first phase change intermediary water supply switching valve is connected to the first phase change intermediary water supply branch pipe; the first phase change intermediate backwater switching valve is connected to the first phase change intermediate backwater branch pipe; the second phase change intermediary water supply switching valve is connected to the second phase change intermediary water supply branch pipe; the second phase-change intermediate backwater switching valve is connected to the second phase-change intermediate backwater branch pipe; the first phase change ice melting water supply switching valve is connected to the first phase change ice melting water supply branch pipe; the first phase change ice-melting backwater switching valve is connected to the first phase change ice-melting backwater branch pipe; the second phase change ice melting water supply switching valve is connected to the second phase change ice melting water supply branch pipe; and the second phase-change ice-melting backwater switching valve is connected to the second phase-change ice-melting backwater branch pipe.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
1. the phase-change energy heat pump unit, the air source heat pump and the pipeline are reasonably configured, one phase-change energy heat pump unit corresponds to two (groups of) phase change machines, the system can continuously operate under the configuration, one (group of) phase change machine is switched to the other (group of) phase change machine for icing when the ice of the phase change machine is melted, the system does not need to be stopped in the operation process, and the continuity of the heat supply effect of the system is ensured.
2. The phase change energy heat pump unit is coupled with the air source heat pump, the air source heat pump is used for providing heat to heat the heat storage water tank to melt ice for the cold water phase change energy heat pump system, and meanwhile, the cold water phase change energy system operates in a cycle comprising multiple processes of freezing, melting ice, ice discharging and the like, the air source heat pump is only needed to provide a small amount of heat for the cold water phase change energy heat pump system in the ice melting process, and the air source heat pump can meet the heat required by the melting ice only by operating for a small amount of time, so that the air source heat pump can be used as an auxiliary heat source system of the cold water phase change energy system in other time periods meeting the ice melting heat of the cold water phase change energy system, and the stability, the comfort and the high efficiency of the heat supply effect of the whole heat pump system are ensured under the condition of extremely cold weather or problems of part of the cold water phase change energy system.
3. The PLC automatic control system is adopted to realize the automatic control of the on-off of the system pipeline and the start-stop of the equipment by the linkage control of the phase change energy heat pump unit, the air source heat pump, all the water pumps (including the tail end pump, the intermediate pump, the ice melting pump and the hot water circulating pump) and the electric switching valve (including all the switching valves), and the operation modes of the system are switched.
Drawings
Fig. 1 is a schematic structural diagram of a cold water phase change energy and air source coupled heat pump system according to the present invention.
The names and the reference numbers of the parts in the drawings are respectively as follows:
phase-change energy heat pump unit 1, phase-change machine 2-2, plate heat exchanger 3, end pump 4, intermediary pump 5, ice-melting pump 6, hot water circulating pump 7, heat storage water tank 8, end water supply main pipe 9, end water return main pipe 10, intermediary water supply main pipe 11, intermediary water return main pipe 12, phase-change intermediary water supply branch pipe 13, phase-change intermediary water return branch pipe 14, phase-change intermediary water supply branch pipe 15, phase-change intermediary water return branch pipe 16, ice-melting water return main pipe 17, ice-melting water supply main pipe 18, phase-change ice-melting water supply branch pipe 19, phase-change ice-melting water return branch pipe 20, phase-change ice-melting water supply branch pipe 21, phase-change ice-melting water return branch pipe 22, hot water return pipe 23, hot water supply pipe 24, phase-change intermediary water supply switching valve 25-1, phase-change water return switching valve 25-2, 25-3 parts of a second phase-change intermediary water supply switching valve, 25-4 parts of a second phase-change intermediary water return switching valve, 25-5 parts of a first phase-change ice-melting water supply switching valve, 25-6 parts of a first phase-change ice-melting water return switching valve, 25-7 parts of a second phase-change ice-melting water supply switching valve, 25-8 parts of a second phase-change ice-melting water return switching valve, 26 parts of an air source circulating pump, 27 parts of a temperature controller, 28 parts of an air source hot water return pipe, 29 parts of an air source hot water supply pipe, 30 parts of an air source water supply main pipe, 31 parts of an air source water return main pipe, 32 parts of an air source tail end water supply branch pipe, 33 parts of an air source tail end water return switching valve, 34-1 parts of the air source tail end water supply switching valve, 34-2 parts of the air source hot water return switching valve, 34-3 parts of the air source hot water supply switching valve, 34-4 parts of the air source hot water supply switching valve and 35 parts of the air source heat pump.
Detailed Description
The first embodiment is as follows: as shown in FIG. 1, the embodiment discloses a cold water phase-change energy and air source coupling heat pump system, which comprises a phase-change energy heat pump unit 1, a first phase-change machine 2-1, a second phase-change machine 2-2, a plate heat exchanger 3, a heat storage water tank 8, a tail end water supply main pipe 9, a tail end water return main pipe 10, an intermediate water supply main pipe 11, an intermediate water return main pipe 12, a first phase-change intermediate water supply branch pipe 13, a first phase-change intermediate water return branch pipe 14, a second phase-change intermediate water supply branch pipe 15, a second phase-change intermediate water return branch pipe 16, an ice-melting water return main pipe 17, an ice-melting water supply main pipe 18, a first phase-change water supply branch pipe 19, a first phase-change water-melting branch pipe 20, a second phase-change ice-melting water supply branch pipe 21, a second phase-change ice-melting water return branch pipe 22, a hot water return pipe 23, a hot water supply line 24, a temperature controller 27, an air source hot water return pipe 28, an air source hot water supply pipe 29, An air source water supply main pipe 30, an air source water return main pipe 31, an air source tail end water supply branch pipe 32, an air source tail end water return branch pipe 33 and an air source heat pump 35;
the tail end water supply main pipe 9 and the tail end water return main pipe 10 are communicated with the phase-change energy heat pump unit 1, one end of the medium water supply main pipe 11 is communicated with the phase-change energy heat pump unit 1, and the other end of the medium water supply main pipe 11 is communicated with a first phase-change medium water supply branch pipe 13 and a second phase-change medium water supply branch pipe 15; the first phase change intermediary water supply branch pipe 13 is communicated with a first phase change machine 2-1, and the second phase change intermediary water supply branch pipe 15 is communicated with a second phase change machine 2-2; one end of the intermediate water return main pipe 12 is communicated with the phase-change energy heat pump unit 1, and the other end of the intermediate water return main pipe 12 is communicated with a first phase-change intermediate water return branch pipe 14 and a second phase-change intermediate water return branch pipe 16; the first phase change intermediate backwater branch pipe 14 is communicated with a first phase change machine 2-1, and the second phase change intermediate backwater branch pipe 16 is communicated with a second phase change machine 2-2;
one end of the ice melting backwater main pipe 17 is communicated with the plate heat exchanger 3, and the other end of the ice melting backwater main pipe 17 is communicated with the first phase change ice melting backwater branch pipe 20 and the second phase change ice melting backwater branch pipe 22; the first phase change ice melting backwater branch pipe 20 is communicated with the first phase change intermediate backwater branch pipe 14, and the second phase change ice melting backwater branch pipe 22 is communicated with the second phase change intermediate backwater branch pipe 16; one end of the ice melting and water supplying main pipe 18 is communicated with the plate heat exchanger 3, and the other end of the ice melting and water supplying main pipe 18 is communicated with the first phase change ice melting and water supplying branch pipe 19 and the second phase change ice melting and water supplying branch pipe 21; the first phase change ice melting water supply branch pipe 19 is communicated with the first phase change intermediary water supply branch pipe 13, and the second phase change ice melting water supply branch pipe 21 is communicated with the second phase change intermediary water supply branch pipe 15; the hot water return pipeline 23 and the hot water supply pipeline 24 are communicated between the plate heat exchanger 3 and the heat storage water tank 8;
the temperature controller 27 is arranged on the heat storage water tank 8; the air source hot water supply pipe 29 is communicated between the heat storage water tank 8 and the air source water supply main pipe 30, and the air source hot water return pipe 28 is communicated between the heat storage water tank 8 and the air source water return main pipe 31; the air source water supply main pipe 30 is communicated with an air source heat pump 35 and an air source tail end water supply branch pipe 32, the air source water return main pipe 31 is communicated with the air source heat pump 35 and an air source tail end water return branch pipe 33, the air source tail end water supply branch pipe 32 is communicated with a tail end water supply main pipe 9, and the air source tail end water return branch pipe 33 is communicated with a tail end water return main pipe 10.
The beneficial effects of the embodiment are as follows: the air source heat pump system comprises an air source heat pump and a circulating pump, the air source comprises the air source heat pump and the circulating pump, the temperature of hot water in the heat storage water tank 8 is constant, the ice melting effect is good, the tail end heat is not consumed, the phase change energy heat pump unit 1 runs stably, the efficiency is high, the tail end heat supply effect is good, and the comfort is high. The air source heat pump 35 can be used as an auxiliary heat source system of the cold water phase-change energy system, and the stability, the comfort and the high efficiency of the heat supply effect of the whole system are guaranteed in extremely cold weather or under the condition that a part of the cold water phase-change energy system has problems.
Further, as shown in fig. 1, the cold water phase change energy and air source coupling heat pump system further includes a tail end pump 4, an intermediate pump 5, an ice melting pump 6, a hot water circulating pump 7 and an air source circulating pump 26; the tail end pump 4 is connected to the tail end water return main pipe 10, the medium pump 5 is connected to the medium water return main pipe 12, the ice melting pump 6 is connected to the ice melting water return main pipe 17, the hot water circulating pump 7 is connected to the hot water return pipeline 23, and the air source circulating pump 26 is connected to the air source hot water return pipe 28.
Further, as shown in fig. 1, the cold water phase change energy and air source coupling heat pump system further includes an air source end water return switching valve 34-1, an air source end water supply switching valve 34-2, an air source hot water return switching valve 34-3, and an air source hot water supply switching valve 34-4; the air source end water return switching valve 34-1 is connected to the air source end water return branch pipe 33, the air source end water supply switching valve 34-2 is connected to the air source end water supply branch pipe 32, the air source hot water return switching valve 34-3 is connected to the air source hot water return pipe 28, and the air source hot water supply switching valve 34-4 is connected to the air source hot water supply pipe 29.
Further, as shown in fig. 1, the cold water phase-change energy and air source coupling heat pump system further comprises a first phase-change intermediary water supply switching valve 25-1, a first phase-change intermediary water return switching valve 25-2, a second phase-change intermediary water supply switching valve 25-3, a second phase-change intermediary water return switching valve 25-4, a first phase-change ice-melting water supply switching valve 25-5, a first phase-change ice-melting water return switching valve 25-6, a second phase-change ice-melting water supply switching valve 25-7 and a second phase-change ice-melting water return switching valve 25-8;
the first phase change intermediary water supply switching valve 25-1 is connected to the first phase change intermediary water supply branch pipe 13; the first phase change intermediate backwater switching valve 25-2 is connected to the first phase change intermediate backwater branch pipe 14; the second phase change intermediary water supply switching valve 25-3 is connected to the second phase change intermediary water supply branch pipe 15; the second phase change intermediate backwater switching valve 25-4 is connected to the second phase change intermediate backwater branch pipe 16; the first phase change ice melting water supply switching valve 25-5 is connected to the first phase change ice melting water supply branch pipe 19; the first phase change ice-melting backwater switching valve 25-6 is connected to the first phase change ice-melting backwater branch pipe 20; the second phase change ice-melting water supply switching valve 25-7 is connected to the second phase change ice-melting water supply branch pipe 21; and the second phase change ice-melting backwater switching valve 25-8 is connected to the second phase change ice-melting backwater branch pipe 22. The beneficial effects of the embodiment are as follows: the system does not need to be shut down in the running process, and the continuity of the heat supply effect of the system is ensured.
The operation principle of the invention is as follows:
the phase change energy heat pump unit 1 is respectively circulated with the first phase change machine 2-1 and the second phase change machine 2-2 in the operation process. When the phase-change energy heat pump unit 1 is communicated with the first phase-change machine 2-1, cold water exchanges heat with intermediate water at a temperature lower than 0 ℃ through a heat exchange pipe wall in the first phase-change machine 2-1, partial cold water releases phase-change latent heat and then freezes on the heat exchange pipe wall, when the ice thickness meets the requirement, the first phase-change intermediate water supply switching valve 25-1 and the first phase-change intermediate water return switching valve 25-2 are closed, the second phase-change intermediate water supply switching valve 25-3 and the second phase-change intermediate water return switching valve 25-4 are opened, the phase-change energy heat pump unit 1 is communicated with the second phase-change machine 2-2, and the cold water starts to freeze in the second phase-change machine 2-2; meanwhile, a first phase change ice melting and water supply switching valve 25-5 and a first phase change ice melting and water return switching valve 25-6 are opened, a first phase change machine 2-1 is communicated with a plate heat exchanger 3, an ice melting pump 6 and a hot water circulating pump 7 are opened in a linkage manner with the first phase change ice melting and water supply switching valve 25-5, heat in a heat storage water tank 8 is transferred to the first phase change machine 2-1 through the plate heat exchanger 3 for melting ice, and the first phase change machine 2-1 is suspended after ice melting and ice discharging; at the moment, cold water is frozen in the second phase change machine 2-2, after the ice thickness meets the requirement, the second phase change intermediary water supply switching valve 25-3 and the second phase change intermediary water return switching valve 25-4 are closed, the first phase change intermediary water supply switching valve 25-1 and the first phase change intermediary water return switching valve 25-2 are opened, and the cold water starts to be frozen in the first phase change machine 2-1; meanwhile, a second phase change ice melting and water supply switching valve 25-7 and a second phase change ice melting and water return switching valve 25-8 are opened, a second phase change machine 2-2 is communicated with the plate heat exchanger 3, an ice melting pump 6 and a hot water circulating pump 7 are opened in a linkage manner with the second phase change ice melting and water supply switching valve 25-7, heat in a heat storage water tank 8 is transferred to the second phase change machine 2-2 through the plate heat exchanger 3 for melting ice, and the second phase change machine 2-2 is suspended after ice melting and ice discharging; at the moment, cold water is frozen in the first phase change machine 2-1, then the first phase change machine 2-1 starts to melt ice and discharge ice after the ice thickness meets the requirement, and the second phase change machine 2-2 starts to freeze, so that the steps are repeated, continuously, stably and efficiently operated, and heat is continuously provided for the tail end.
The heat required by the ice melting of the cold water phase change energy heat pump system is provided by the heat storage water tank 8, the temperature controller 27 is arranged in the heat storage water tank 8, the temperature controller 27 transmits a temperature signal to the air source heat pump 35, and the heat provided by the air source heat pump 35 controls the temperature of hot water in the heat storage water tank 8 to be kept constant. When the temperature of hot water in the heat storage water tank 8 is reduced, the air source heat pump 35 starts to operate, the air source circulating pump 26 is started, the air source hot water return switching valve 34-3 and the air source hot water supply switching valve 34-4 are opened, and after the temperature of hot water in the heat storage water tank 8 is increased to a set temperature, the air source heat pump 35, the air source circulating pump 26, the air source hot water return switching valve 34-3 and the air source hot water supply switching valve 34-4 are closed.
In the time period that the air source heat pump 35 does not need to heat the heat storage water tank 8, the air source tail end water return switching valve 34-1 and the air source tail end water supply switching valve 34-2 can be controlled to be opened, the air source tail end water supply branch pipe 32 and the air source tail end water return branch pipe 33 are respectively connected to the tail end water supply main pipe 9 and the tail end water return main pipe 10, the air source heat pump 33 is opened, and the air source heat pump 35 serves as an auxiliary heat source system of the whole system to supply heat to the tail end.
The foregoing merely illustrates the principles and features of the invention and is presented in some detail and not to be construed as limiting the scope of the invention. There are numerous variations and modifications of this invention that fall within the scope of the claimed invention without departing from its spirit and scope. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a cold water phase transition can and air source coupling heat pump system which characterized in that: the phase-change energy heat pump unit comprises a phase-change energy heat pump unit (1), a first phase-change machine (2-1), a second phase-change machine (2-2), a plate heat exchanger (3), a heat storage water tank (8), a tail-end water supply main pipe (9), a tail-end water return main pipe (10), an intermediate water supply main pipe (11), an intermediate water return main pipe (12), a first phase-change intermediate water supply branch pipe (13), a first phase-change intermediate water return branch pipe (14), a second phase-change intermediate water supply branch pipe (15), a second phase-change intermediate water return branch pipe (16), an ice-melting water return main pipe (17), an ice-melting water supply main pipe (18), a first phase-change ice-melting water supply branch pipe (19), a first phase-change ice-melting water return branch pipe (20), a second phase-change ice-melting water supply branch pipe (21), a second phase-change ice-melting water return branch pipe (22), a hot water return pipeline (23), a hot water supply line (24), a temperature controller (27), a hot water return pipe (28), an air source and a heat exchanger, An air source hot water supply pipe (29), an air source water supply main pipe (30), an air source water return main pipe (31), an air source tail end water supply branch pipe (32), an air source tail end water return branch pipe (33) and an air source heat pump (35);
the tail end water supply main pipe (9) and the tail end water return main pipe (10) are communicated with the phase-change energy heat pump unit (1), one end of the intermediate water supply main pipe (11) is communicated with the phase-change energy heat pump unit (1), and the other end of the intermediate water supply main pipe (11) is communicated with a first phase-change intermediate water supply branch pipe (13) and a second phase-change intermediate water supply branch pipe (15); the first phase change intermediary water supply branch pipe (13) is communicated with the first phase change machine (2-1), and the second phase change intermediary water supply branch pipe (15) is communicated with the second phase change machine (2-2); one end of the intermediate backwater main pipe (12) is communicated with the phase-change energy heat pump unit (1), and the other end of the intermediate backwater main pipe (12) is communicated with a first phase-change intermediate backwater branch pipe (14) and a second phase-change intermediate backwater branch pipe (16); the first phase change intermediate water return branch pipe (14) is communicated with the first phase change machine (2-1), and the second phase change intermediate water return branch pipe (16) is communicated with the second phase change machine (2-2);
one end of the ice melting backwater main pipe (17) is communicated with the plate type heat exchanger (3), and the other end of the ice melting backwater main pipe (17) is communicated with the first phase change ice melting backwater branch pipe (20) and the second phase change ice melting backwater branch pipe (22); the first phase change ice melting backwater branch pipe (20) is communicated with the first phase change intermediate backwater branch pipe (14), and the second phase change ice melting backwater branch pipe (22) is communicated with the second phase change intermediate backwater branch pipe (16); one end of the ice melting and water supplying main pipe (18) is communicated with the plate type heat exchanger (3), and the other end of the ice melting and water supplying main pipe (18) is communicated with the first phase change ice melting and water supplying branch pipe (19) and the second phase change ice melting and water supplying branch pipe (21); the first phase change ice melting water supply branch pipe (19) is communicated with the first phase change intermediary water supply branch pipe (13), and the second phase change ice melting water supply branch pipe (21) is communicated with the second phase change intermediary water supply branch pipe (15); the hot water return pipeline (23) and the hot water supply pipeline (24) are communicated and arranged between the plate heat exchanger (3) and the heat storage water tank (8);
the temperature controller (27) is arranged on the heat storage water tank (8); the air source hot water supply pipe (29) is communicated between the heat storage water tank (8) and the air source water supply main pipe (30), and the air source hot water return pipe (28) is communicated between the heat storage water tank (8) and the air source water return main pipe (31); the air source water supply main pipe (30) is communicated with an air source heat pump (35) and an air source tail end water supply branch pipe (32), the air source water return main pipe (31) is communicated with the air source heat pump (35) and the air source tail end water return branch pipe (33), the air source tail end water supply branch pipe (32) is communicated with a tail end water supply main pipe (9), and the air source tail end water return branch pipe (33) is communicated with a tail end water return main pipe (10).
2. The cold water phase change energy and air source coupled heat pump system of claim 1, wherein: the cold water phase change energy and air source coupling heat pump system further comprises a tail end pump (4), an intermediate pump (5), an ice melting pump (6), a hot water circulating pump (7) and an air source circulating pump (26); the ice melting system is characterized in that the tail end pump (4) is connected to the tail end water return main pipe (10), the medium pump (5) is connected to the medium water return main pipe (12), the ice melting pump (6) is connected to the ice melting water return main pipe (17), the hot water circulating pump (7) is connected to the hot water return pipeline (23), and the air source circulating pump (26) is connected to the air source hot water return pipe (28).
3. The cold water phase change energy and air source coupled heat pump system of claim 1, wherein: the cold water phase change energy and air source coupling heat pump system further comprises an air source tail end water return switching valve (34-1), an air source tail end water supply switching valve (34-2), an air source hot water return switching valve (34-3) and an air source hot water supply switching valve (34-4); the air source tail end water return switching valve (34-1) is connected to an air source tail end water return branch pipe (33), the air source tail end water supply switching valve (34-2) is connected to an air source tail end water supply branch pipe (32), the air source hot water return switching valve (34-3) is connected to an air source hot water return pipe (28), and the air source hot water supply switching valve (34-4) is connected to an air source hot water supply pipe (29).
4. The cold water phase change energy and air source coupled heat pump system of claim 1, wherein: the cold water phase-change energy and air source coupling heat pump system further comprises a first phase-change intermediary water supply switching valve (25-1), a first phase-change intermediary water return switching valve (25-2), a second phase-change intermediary water supply switching valve (25-3), a second phase-change intermediary water return switching valve (25-4), a first phase-change ice-melting water supply switching valve (25-5), a first phase-change ice-melting water return switching valve (25-6), a second phase-change ice-melting water supply switching valve (25-7) and a second phase-change ice-melting water return switching valve (25-8);
the first phase change intermediary water supply switching valve (25-1) is connected to the first phase change intermediary water supply branch pipe (13); the first phase change intermediate backwater switching valve (25-2) is connected to the first phase change intermediate backwater branch pipe (14); the second phase change intermediary water supply switching valve (25-3) is connected to the second phase change intermediary water supply branch pipe (15); the second phase change intermediate backwater switching valve (25-4) is connected to the second phase change intermediate backwater branch pipe (16); the first phase change ice melting water supply switching valve (25-5) is connected to the first phase change ice melting water supply branch pipe (19); the first phase change ice-melting backwater switching valve (25-6) is connected to the first phase change ice-melting backwater branch pipe (20); the second phase change ice melting water supply switching valve (25-7) is connected to the second phase change ice melting water supply branch pipe (21); and the second phase-change ice-melting backwater switching valve (25-8) is connected to the second phase-change ice-melting backwater branch pipe (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110919753.2A CN113566452A (en) | 2021-08-11 | 2021-08-11 | Cold water phase change energy and air source coupling heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110919753.2A CN113566452A (en) | 2021-08-11 | 2021-08-11 | Cold water phase change energy and air source coupling heat pump system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4336692A (en) * | 1980-04-16 | 1982-06-29 | Atlantic Richfield Company | Dual source heat pump |
| CN102384586A (en) * | 2010-08-28 | 2012-03-21 | 陈则韶 | Parallel-connection type mutually-helped defrosting water heater of air source heat pump |
| CN106918100A (en) * | 2017-03-03 | 2017-07-04 | 燕山大学 | A kind of solar energy aids in ice accumulation of energy seawater source heat pump air conditioning systems |
| CN112361657A (en) * | 2020-11-12 | 2021-02-12 | 青岛大学 | Novel water source phase change heat exchange device and heat pump system |
| WO2021094787A1 (en) * | 2019-11-15 | 2021-05-20 | University Of Hull | A heat pump adaptor system |
-
2021
- 2021-08-11 CN CN202110919753.2A patent/CN113566452A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4336692A (en) * | 1980-04-16 | 1982-06-29 | Atlantic Richfield Company | Dual source heat pump |
| CN102384586A (en) * | 2010-08-28 | 2012-03-21 | 陈则韶 | Parallel-connection type mutually-helped defrosting water heater of air source heat pump |
| CN106918100A (en) * | 2017-03-03 | 2017-07-04 | 燕山大学 | A kind of solar energy aids in ice accumulation of energy seawater source heat pump air conditioning systems |
| WO2021094787A1 (en) * | 2019-11-15 | 2021-05-20 | University Of Hull | A heat pump adaptor system |
| CN112361657A (en) * | 2020-11-12 | 2021-02-12 | 青岛大学 | Novel water source phase change heat exchange device and heat pump system |
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