CN111336721B - Air source heat pump air conditioner and heat pump water heater combined operation system - Google Patents
Air source heat pump air conditioner and heat pump water heater combined operation system Download PDFInfo
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- CN111336721B CN111336721B CN202010131911.3A CN202010131911A CN111336721B CN 111336721 B CN111336721 B CN 111336721B CN 202010131911 A CN202010131911 A CN 202010131911A CN 111336721 B CN111336721 B CN 111336721B
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a combined operation system of an air source heat pump air conditioner and a heat pump water heater, which comprises an air source heat pump air conditioner mechanism, a water storage tank mechanism and an air source heat pump water heater mechanism, wherein the air source heat pump air conditioner mechanism is connected with the water storage tank mechanism through a pipeline; the air source heat pump air conditioning mechanism is connected with the water storage tank mechanism in a heat exchange manner, and the water storage tank mechanism is connected with the air source heat pump water heater mechanism in a heat exchange manner. Compared with the prior art, the invention realizes the collection of waste heat of the air source heat pump air conditioning mechanism and the transmission of the waste heat to the heat source of the air source heat pump water heater mechanism, and optimizes the energy utilization efficiency of the system; the efficiency of the heat pump during defrosting in winter is improved, the energy of a heat source during defrosting is from the energy of a supercooling section which cannot be utilized during heating in the original cycle, and the energy does not need to be introduced from the outside or occupy the heat of hot water supply or heating of the original heat pump, so that the extra energy consumption is avoided; the construction of the scheme can be completed based on common facilities in public buildings; the system has strong universality and wide application range; the system is easy to control, and the control scheme is simple.
Description
Technical Field
The invention relates to the field of heat pump systems, in particular to a combined operation system of an air source heat pump air conditioner and a heat pump water heater.
Background
In large public buildings, there is a huge building energy consumption, wherein the requirements of domestic hot water and air conditioning account for the largest proportion of the building energy consumption. In order to save energy, an air source heat pump is usually adopted in the market for supplying heat, and the heat is taken from outdoor air, so that the high-efficiency utilization of electric energy is realized, and the purposes of energy conservation and environmental protection are achieved. However, when the air source heat pump is used under a low-temperature working condition, the frosting condition is easy to occur. In addition, different heat pump systems are lack of connection, and the design of an energy utilization scheme is deficient.
The defrosting schemes commonly used in the market at present are electric heating defrosting and heat pump reverse operation defrosting, wherein the electric heating defrosting consumes more energy due to the use of an auxiliary power supply, and is not beneficial to energy conservation and environmental protection; the latter heat pump is difficult to heat during defrosting operation, and the service efficiency of the equipment can be greatly reduced after a long time. In the design aspect of the whole system scheme, the existing domestic hot water system and the air conditioning system are often not effectively connected, the energy scheme is not optimized, for example, under the refrigeration working condition in summer, the air source heat pump air conditioner can generate high-temperature energy while conveying cold energy to the indoor, but directly discharges the high-temperature energy into the environment, meanwhile, the hot water supply heat pump is lack of a high-quality heat source and needs to re-heat from the environment, the uncoordinated situation causes the inefficient energy utilization, and great waste is formed.
The closest technical scheme of the invention mainly comprises the following steps: chinese patent CN 207095144U proposes an air source heat pump defrosting device, which utilizes solar energy to heat water and store the water in a circulating water tank, and then leads the hot water out of the circulating water tank to enter a circulating pipe wrapped outside an evaporator, thereby avoiding frosting, but this technology needs to take heat from outside, not based on the energy of the heat pump itself, and meanwhile, the solar energy is greatly influenced by the environment; chinese patent CN 107990608A proposes a scheme of connecting a set of heat exchangers in parallel with a condenser, and heat is stored by a heat storage material, so that energy is provided for defrosting when frosting, but the heat stored by the technology is the heat originally supplied by a heat pump, and extra energy is consumed; chinese patent CN 105318550 a proposes a heat storage water tank and a heat pump water heater, which optimizes the heat storage capacity and the heat exchange capacity by optimizing the structure of the refrigerant pipeline, the water side flow path and the water tank. However, the core of the technology lies in the design of the water storage tank, the heat storage and heat exchange capacity of the water storage tank is improved, the design of the scheme of the integral heat pump system is not provided, and the energy in the scheme of the integral heat pump system is not utilized.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a combined operation system of an air source heat pump air conditioner and a heat pump water heater, solves the problem that the energy utilization of a heat pump system in a building is not efficient enough, and provides a complete solution from the design aspect of the whole system for the frosting problem.
The purpose of the invention can be realized by the following technical scheme:
the air source heat pump air conditioner and heat pump water heater combined operation system comprises an air source heat pump air conditioner mechanism, a water storage tank mechanism and an air source heat pump water heater mechanism, wherein the water storage tank mechanism is connected with the air source heat pump air conditioner mechanism through a water pipe, and the water storage tank mechanism is connected with the air source heat pump water heater mechanism.
The air source heat pump air conditioning mechanism has two structural forms:
the first structural form of the air source heat pump air conditioning mechanism comprises a first compressor, a first four-way reversing valve, a second four-way reversing valve, a first outdoor coil, an indoor coil, a first throttling device and a first plate type heat exchanger, wherein the flow direction of a refrigerant is switched through the first four-way reversing valve and the second four-way reversing valve, so that the refrigeration and heating, and the heat storage and heat extraction switching from a water storage tank are realized. In refrigerant circulation, a first interface, a second interface, a third interface and a fourth interface of the first four-way reversing valve are respectively connected with an outlet end of a first compressor, a first outdoor coil pipe, an inlet end of the first compressor and an indoor coil pipe through refrigerant pipes, a first interface, a second interface, a third interface and a fourth interface of the second four-way reversing valve are respectively connected with the first outdoor coil pipe, a first throttling device, an indoor coil pipe and a first plate heat exchanger through refrigerant pipes, and the first throttling device is connected with the first plate heat exchanger through refrigerant pipes; in waterway circulation, the first plate heat exchanger is connected with the water storage tank mechanism through a water pipe and exchanges heat; in the air circulation, the first outdoor coil pipe and the indoor coil pipe are respectively connected with the air of the environment through the air duct and exchange heat.
The second structural form of the air source heat pump air conditioning mechanism comprises a first compressor, a first four-way reversing valve, a first two-way electromagnetic valve, a second two-way electromagnetic valve, a first outdoor coil pipe, an indoor coil pipe, a first throttling device, a third throttling device and a first plate type heat exchanger, and the difference of the first structural form is that the second four-way reversing valve is replaced by the first two-way electromagnetic valve, the second two-way electromagnetic valve and the third throttling device. The specific connection form is that a first throttling device and a first bidirectional solenoid valve are connected in parallel through a refrigerant pipe and then connected between a first outdoor coil and a first plate heat exchanger, and a third throttling device and a second bidirectional solenoid valve are connected in parallel and then connected between the first plate heat exchanger and an indoor coil.
The water storage tank mechanism comprises a water storage tank, a first water pump and a second water pump, and water is pumped from the water storage tank through the first water pump and the second water pump, so that heat exchange with the air source heat pump air conditioning mechanism and the air source heat pump water heater mechanism is realized. In waterway circulation, the water storage tank, the first water pump and the first plate heat exchanger form closed-loop connection through water pipes; the water storage tank, the second water pump and the third plate heat exchanger form closed-loop connection through water pipes.
The air source heat pump water heater mechanism has two structural forms:
the first structural form of the air source heat pump water heater mechanism comprises a second compressor, a third four-way reversing valve, a fourth four-way reversing valve, a second outdoor coil, a second throttling device, a second plate type heat exchanger and a third plate type heat exchanger, wherein the flow direction of a refrigerant is switched through the third four-way reversing valve and the fourth four-way reversing valve, so that the refrigeration and heating, and the heat storage and heat extraction switching from a water storage tank are realized. In refrigerant circulation, a first interface, a second interface, a third interface and a fourth interface of the third four-way reversing valve are respectively connected with an outlet end of a second compressor, a second plate heat exchanger, an inlet end of the second compressor and a second outdoor coil pipe through refrigerant pipes, the first interface, the second interface, the third interface and the fourth interface of the fourth four-way reversing valve are respectively connected with the second outdoor coil pipe, the third plate heat exchanger, the second plate heat exchanger and a second throttling device through refrigerant pipes, and the second throttling device is connected with the third plate heat exchanger through refrigerant pipes; in the waterway circulation, the second plate heat exchanger introduces hot water through a water pipe, and the third plate heat exchanger is connected with the water storage tank mechanism through a water pipe and exchanges heat; in the air circulation, the second outdoor coil pipe is respectively connected with the air of the environment through an air duct and performs heat exchange.
The second structural form of the air source heat pump water heater mechanism comprises a second compressor, a third four-way reversing valve, a third two-way electromagnetic valve, a fourth two-way electromagnetic valve, a second outdoor coil pipe, a second throttling device, a fourth throttling device, a second plate heat exchanger and a third plate heat exchanger. The difference from the first structural form is that the fourth four-way reversing valve is replaced by a third two-way electromagnetic valve, a fourth two-way electromagnetic valve and a fourth throttling device. The specific connection form is that the second throttling device and the third two-way electromagnetic valve are connected in parallel and then connected between the second outdoor coil pipe and the third plate heat exchanger through the refrigerant pipe, and the fourth throttling device and the fourth two-way electromagnetic valve are connected in parallel and then connected between the second plate heat exchanger and the third plate heat exchanger.
Under summer working conditions, for a first structural form of the air source heat pump air conditioning mechanism and the domestic hot water system, the outlet end of the first compressor is communicated with the first outdoor coil pipe through the first four-way reversing valve, and the inlet end of the first compressor is communicated with the indoor coil pipe. The second four-way reversing valve enables the first outdoor coil to be communicated with the first plate type heat exchanger, and the first throttling device is communicated with the indoor coil. The inlet end of the second compressor is communicated with the second outdoor coil pipe through the third four-way reversing valve, and the outlet end of the second compressor is communicated with the second plate heat exchanger. And the fourth four-way reversing valve enables the second outdoor coil pipe to be communicated with the third plate heat exchanger, and the second throttling device is communicated with the second plate heat exchanger. Compared with the first structural form, the second structural form of the air source heat pump air conditioning mechanism and the domestic hot water system only needs to close the second bidirectional electromagnetic valve and the fourth bidirectional electromagnetic valve, so that the first outdoor coil, the first bidirectional electromagnetic valve, the first plate type heat exchanger, the third throttling device and the indoor coil are sequentially communicated through the refrigerant, and the second outdoor coil, the third bidirectional electromagnetic valve, the third plate type heat exchanger, the fourth throttling device and the second plate type heat exchanger are sequentially communicated through the refrigerant.
Under the working condition in winter, when two sets of heat pump systems are not frosted, for the first structural form of the air source heat pump air conditioning mechanism and the domestic hot water system, the outlet end of the first compressor is communicated with the indoor coil pipe through the first four-way reversing valve, and the inlet end of the first compressor is communicated with the first outdoor coil pipe. The second four-way reversing valve enables the first outdoor coil pipe to be communicated with the first throttling device, and the first plate type heat exchanger is communicated with the indoor coil pipe. The inlet end of the second compressor is communicated with the second outdoor coil pipe through the third four-way reversing valve, and the outlet end of the second compressor is communicated with the second plate heat exchanger. And the fourth four-way reversing valve enables the second plate heat exchanger to be communicated with the third plate heat exchanger, and the second throttling device is communicated with the second outdoor coil pipe. Compared with the first structural form, the second structural form of the air source heat pump air conditioning mechanism and the domestic hot water system only needs to close the first two-way electromagnetic valve and the third two-way electromagnetic valve, so that the first outdoor coil, the first throttling device, the first plate type heat exchanger, the second two-way electromagnetic valve and the indoor coil are sequentially communicated through the refrigerant, and the second outdoor coil, the second throttling device, the third plate type heat exchanger, the fourth two-way electromagnetic valve and the second plate type heat exchanger are sequentially communicated through the refrigerant.
Under the working condition in winter, when the air source heat pump air-conditioning mechanism frosts, for the first structural form, the first four-way reversing valve enables the outlet end of the first compressor to be communicated with the first outdoor coil pipe, and the inlet end of the first compressor is communicated with the indoor coil pipe. The second four-way reversing valve enables the first outdoor coil pipe to be communicated with the first throttling device, and the first plate type heat exchanger is communicated with the indoor coil pipe. For the second structural form, compared with the first structural form, only the first bidirectional electromagnetic valve needs to be closed, so that the first outdoor coil, the first throttling device, the first plate heat exchanger, the second bidirectional electromagnetic valve and the indoor coil are sequentially communicated through the refrigerant.
Under the working condition in winter, when the air source heat pump water heater mechanism frosts, for the first structural form, the third four-way reversing valve enables the outlet end of the second compressor to be communicated with the second outdoor coil pipe, and the inlet end of the second compressor is communicated with the second plate heat exchanger. And the fourth four-way reversing valve enables the second plate heat exchanger to be communicated with the third plate heat exchanger, and the second throttling device is communicated with the second outdoor coil pipe. For the second structural form, compared with the first structural form, the third bidirectional electromagnetic valve is only required to be closed, so that the second outdoor coil pipe, the second throttling device, the third plate heat exchanger, the fourth bidirectional electromagnetic valve and the second plate heat exchanger pipe are sequentially communicated through the refrigerant.
Based on the technical scheme, the invention has the following technical advancement:
1. the water storage tank is connected with the air source heat pump air conditioning mechanism and the air source heat pump water heater mechanism, and a bridge is built for energy transfer between the two sets of heat pump systems;
2. in a summer mode, the air source heat pump air-conditioning mechanism is additionally provided with a subcooler, and the air source heat pump water heater mechanism is additionally provided with a set of evaporator, so that waste heat which cannot be dissipated to the environment by the air source heat pump air-conditioning mechanism can be further collected in the water tank and can be used for conveying heat to the air source heat pump water heater mechanism;
3. in a non-defrosting mode in winter, the design of the subcooler is added for the air source heat pump air-conditioning mechanism and the air source heat pump water heater mechanism, so that waste heat which cannot be used for heating indoor by the air source heat pump air-conditioning mechanism and waste heat which cannot be used for supplying hot water by the air source heat pump water heater mechanism can be stored in the water tank;
4. in the defrosting mode in winter, the air source heat pump air-conditioning mechanism and the air source heat pump water heater mechanism are additionally provided with evaporators, so that the air source heat pump air-conditioning mechanism or the air source heat pump water heater mechanism directly takes heat from the water storage tank, and the defrosting efficiency is improved;
5. two structural forms capable of realizing the switching of the three modes are designed, the first structure is that a four-way reversing valve and a plate heat exchanger are respectively added in front of and behind the throttling devices of the air source heat pump air-conditioning mechanism and the air source heat pump water heater mechanism, and the second structure is that two sets of two-way electromagnetic valves, two sets of throttling devices and a plate heat exchanger are respectively added in the rear of the outdoor coil pipes of the air source heat pump air-conditioning mechanism and the air source heat pump water heater mechanism.
Compared with the prior art, the invention has the following obvious advantages:
1. the waste heat of the air-source heat pump air-conditioning mechanism is collected and conveyed to the heat source of the air-source heat pump water heater mechanism, and the energy utilization efficiency of the system is optimized;
2. the efficiency of the heat pump during defrosting in winter can be improved, the energy of a heat source during defrosting is from the energy of a supercooling section which cannot be utilized during heating in the original cycle, and the energy does not need to be introduced from the outside or occupy the heat of hot water supply or heating of the original heat pump, so that the extra energy consumption is avoided;
3. the system scheme is mature in technology and low in cost, the construction of the scheme can be completed based on common facilities in a public building, and components needing to be added are mature in technology and low in price;
4. the system has strong universality, and the scheme has small change on the original facilities in the public building, so the application range is wide;
5. the system is easy to control, the control scheme is simple, energy transmission and energy storage between the two sets of heat pump systems are realized, and the coupling performance of the two sets of heat pump systems is low.
Drawings
FIG. 1 is a schematic structural diagram of a four-way reversing valve-based combined operation system of an air source heat pump air conditioner and a heat pump water heater of the invention;
FIG. 2 is a schematic structural diagram of a combined operation system of an air source heat pump air conditioner and a heat pump water heater based on a two-way electromagnetic valve;
FIG. 3 is a schematic diagram of the working process of the combined operation system of the air source heat pump air conditioner and the heat pump water heater in summer;
FIG. 4 is a schematic view of the working process of the combined operation system of the air source heat pump air conditioner and the heat pump water heater under the non-defrosting working condition in winter according to the present invention;
FIG. 5 is a schematic view of the working flow of the air source heat pump air-conditioning mechanism under the working condition of defrosting in winter in the combined operation system of the air source heat pump air-conditioner and the heat pump water heater of the invention;
fig. 6 is a schematic view of the working flow of the air source heat pump water heater mechanism in the combined operation system of the air source heat pump air conditioner and the heat pump water heater under the working condition of defrosting in winter.
In the figure: A. the system comprises an outer machine case of an air source heat pump air-conditioning mechanism, a water storage tank B, an outer machine case of an air source heat pump water heater mechanism and a water storage tank C;
1. the system comprises a first compressor, 2, a first four-way reversing valve, 3, a first outdoor coil, 4, a second four-way reversing valve, 5, a first throttling device, 6, a first plate heat exchanger, 7, an indoor coil, 8, a first water pump, 9, a second water pump, 10, a second compressor, 11, a third four-way reversing valve, 12, a second outdoor coil, 13, a fourth four-way reversing valve, 14, a second throttling device, 15, a third plate heat exchanger, 16, a second plate heat exchanger, 17, a first bidirectional solenoid valve, 18, a second bidirectional solenoid valve, 19, a third throttling device, 20, a third bidirectional solenoid valve, 21, a fourth bidirectional solenoid valve, 22 and a fourth throttling device.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
The combined operation system of the air source heat pump air conditioner and the heat pump water heater in the embodiment, as shown in fig. 1, includes:
a refrigerant circulation circuit: the system mainly comprises a refrigerant cycle of an air source heat pump air conditioning mechanism and a refrigerant cycle of an air source heat pump water heater mechanism. The connection relationship among all parts in the air source heat pump air conditioning mechanism refrigerant circulation is as follows: a first interface, a second interface, a third interface and a fourth interface of the first four-way reversing valve 2 are respectively connected with an outlet end of the first compressor 1, the first outdoor coil 3, an inlet end of the first compressor 1 and the indoor coil 7 through refrigerant pipes, a first interface, a second interface, a third interface and a fourth interface of the second four-way reversing valve 4 are respectively connected with the first outdoor coil 3, the first throttling device 5, the indoor coil 7 and the first plate heat exchanger 6 through refrigerant pipes, and the first throttling device 5 is connected with the first plate heat exchanger 6 through refrigerant pipes; the connection relationship of all parts in the refrigerant cycle of the air source heat pump water heater mechanism is as follows: the first interface, the second interface, the third interface and the fourth interface of the third four-way reversing valve 11 are respectively connected with the outlet end of the second compressor 10, the second plate heat exchanger 16, the inlet end of the second compressor 10 and the second outdoor coil pipe 12 through refrigerant pipes, the first interface, the second interface, the third interface and the fourth interface of the fourth four-way reversing valve 13 are respectively connected with the second outdoor coil pipe 12, the third plate heat exchanger 15, the second plate heat exchanger 16 and the second throttling device 14 through refrigerant pipes, and the second throttling device 14 is connected with the third plate heat exchanger 15 through refrigerant pipes.
A water path circulation loop: the air source heat pump water heater mainly comprises an air source heat pump air conditioning mechanism, a water storage tank mechanism, an air source heat pump water heater mechanism and a water path circulation between the air source heat pump water heater mechanism and heating hot water. The air-source heat pump air-conditioning mechanism and the water storage tank mechanism are in closed circulation, and the connection relationship of the components is as follows: the first plate heat exchanger 6 is connected with a first water pump 8 and a water storage tank B in sequence through a water pipe; the water storage tank mechanism and the air source heat pump water heater mechanism are in closed circulation, and the connection relationship of the components is as follows: the third plate heat exchanger 15 is connected with the second water pump 9 and the water storage tank B in sequence through water pipes; the air source heat pump water heater mechanism is connected with hot water through a second plate type heat exchanger 16.
An air circulation circuit: mainly including first outdoor coil 3 is connected with the air of outdoor environment through the wind channel, and second outdoor coil 12 is connected with the air of outdoor environment through the wind channel and indoor coil 7 is connected with the room air through the wind channel.
In the specific operation process:
fig. 3 shows the working process of the system in summer:
a refrigerant of the air source heat pump air conditioning mechanism becomes high-temperature and high-pressure gas under the action of the first compressor 1, enters the first outdoor coil 3 through the first four-way reversing valve 2 for heat dissipation, then dissipates heat and supercools the circulating water connected with the water storage tank B through the first plate heat exchanger 6, throttles the dissipated refrigerant through the first throttling device 5, enters the indoor coil 7 through the second four-way reversing valve 4 for conveying cold energy indoors, and finally enters the inlet of the first compressor 1 through the first four-way reversing valve 2;
the water storage tank mechanism stores heat into the stored water in the water storage tank B after exchanging heat with the first plate heat exchanger 6 through the first water pump 8, and then supplies hot water to the third plate heat exchanger 15 through the second water pump 9;
after absorbing heat from the third plate heat exchanger 15, the refrigerant of the air source heat pump water heater mechanism enters the second outdoor coil 12 through the refrigerant pipe via the fourth four-way reversing valve 13 to further absorb heat, then enters the second compressor 10 through the third four-way reversing valve 11 to become high-temperature and high-pressure gas, then enters the second plate heat exchanger 16 through the third four-way reversing valve 11 to provide heat for hot water, and then returns to the third plate heat exchanger 15 after being throttled by the second throttling device 14 through the fourth four-way reversing valve 13.
Fig. 4 shows the working process of the system under the non-defrosting condition in winter:
a refrigerant of the air source heat pump air conditioning mechanism becomes high-temperature and high-pressure gas under the action of the first compressor 1, enters the indoor coil 7 through the first four-way reversing valve 2 for heat dissipation, then enters the first plate heat exchanger 6 through the second four-way reversing valve 4 for heat dissipation and supercooling through circulating water connected with the water storage tank B, is throttled by the first throttling device 5, enters the first outdoor coil 3 through the second four-way reversing valve 4 and absorbs energy from outdoor air, and finally enters an inlet of the first compressor 1 through the first four-way reversing valve 2;
after absorbing heat from the environment through the second outdoor coil pipe 12, a refrigerant of the air source heat pump water heater mechanism enters the second compressor 10 through a refrigerant pipe through the third four-way reversing valve 11 to become high-temperature and high-pressure gas, then enters the second plate heat exchanger 16 through the third four-way reversing valve 11 to provide heat for supplying hot water, then enters the third plate heat exchanger 15 through the refrigerant pipe through the fourth four-way reversing valve 13 to dissipate heat and supercool, and then enters the second outdoor coil pipe 12 through the fourth four-way reversing valve 13 after being throttled by the second throttling device 14;
after the water storage tank mechanism exchanges heat with the first plate heat exchanger 6 and the third plate heat exchanger 15, heat is stored in the storage water in the water storage tank B through the first water pump 8 and the second water pump 9 respectively.
Fig. 5 shows the working process of the air source heat pump air conditioning mechanism under the working condition of defrosting in winter:
the water storage tank mechanism provides hot water for the first plate type heat exchanger 6 through a first water pump 8, so that heat is conveyed to the air source heat pump air conditioning mechanism;
a refrigerant of the air source heat pump air conditioning mechanism absorbs heat through the first plate heat exchanger 6, enters the first compressor 1 through the refrigerant pipe through the second four-way reversing valve 4, the indoor coil 7 and the first four-way reversing valve 2 to become high-temperature and high-pressure gas, is conveyed to the first outdoor coil 3 through the first four-way reversing valve 2 to be defrosted, enters the first throttling device 5 through the second four-way reversing valve 4 to be throttled, and then enters the first plate heat exchanger 6 again.
Fig. 6 shows the working process of the air source heat pump water heater mechanism under the working condition of defrosting in winter:
the water storage tank mechanism supplies hot water to the third plate heat exchanger 15 through the second water pump 9, so that heat is conveyed to the air source heat pump water heater mechanism;
the refrigerant of the air source heat pump water heater mechanism absorbs heat through the third plate heat exchanger 15, enters the second compressor 10 through the refrigerant pipe through the fourth four-way reversing valve 13, the second plate heat exchanger 16 and the third four-way reversing valve 11 to become high-temperature and high-pressure gas, is conveyed to the second outdoor coil pipe 12 through the third four-way reversing valve 11 to be defrosted, and enters the second throttling device 14 through the fourth four-way reversing valve 13 to be throttled and then enters the third plate heat exchanger 15 again.
Example 2
Fig. 2 shows another structure form of the combined operation system of the air source heat pump air conditioner and the heat pump water heater. The difference from fig. 1 is that the second four-way reversing valve 4 and the fourth four-way reversing valve 13 are replaced with a first two-way solenoid valve 17, a second two-way solenoid valve 18, a third throttling device 19, a third two-way solenoid valve 20, a fourth two-way solenoid valve 21, and a fourth throttling device 22.
The specific implementation form is as follows: in summer, the first two-way solenoid valve 17 (the third two-way solenoid valve 20) is opened, and the second two-way solenoid valve 18 (the fourth two-way solenoid valve 21) is closed; in winter conditions, the second two-way solenoid valve 18 (the fourth two-way solenoid valve 21) is opened, and the first two-way solenoid valve 17 (the third two-way solenoid valve 20) is closed.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (7)
1. A combined operation system of an air source heat pump air conditioner and a heat pump water heater is characterized by comprising an air source heat pump air conditioner mechanism, a water storage tank mechanism and an air source heat pump water heater mechanism, wherein the air source heat pump air conditioner mechanism is in heat exchange connection with the water storage tank mechanism and the water storage tank mechanism is in heat exchange connection with the air source heat pump water heater mechanism;
the air source heat pump air conditioning mechanism comprises a first compressor (1), a first four-way reversing valve (2), a second four-way reversing valve (4), a first outdoor coil (3), an indoor coil (7), a first throttling device (5) and a first plate type heat exchanger (6), wherein a first interface, a second interface, a third interface and a fourth interface of the first four-way reversing valve (2) are respectively connected with an outlet end of the first compressor (1), the first outdoor coil (3), an inlet end of the first compressor (1) and the indoor coil (7) through refrigerant pipes; a first interface, a second interface, a third interface and a fourth interface of the second four-way reversing valve (4) are respectively connected with the first outdoor coil (3), the first throttling device (5), the indoor coil (7) and the first plate heat exchanger (6) through refrigerant pipes, the first throttling device (5) is connected with the first plate heat exchanger (6) through the refrigerant pipes, the flow direction of the refrigerant is switched through the first four-way reversing valve (2) and the second four-way reversing valve (4), and the switching of refrigeration and heating and heat storage/heat extraction from the water storage tank mechanism is realized;
or the like, or, alternatively,
the air source heat pump air-conditioning mechanism comprises a first compressor (1), a first four-way reversing valve (2), a first two-way solenoid valve (17), a second two-way solenoid valve (18), a first outdoor coil (3), an indoor coil (7), a first throttling device (5), a third throttling device (19) and a first plate heat exchanger (6), the first throttling device (5) and the first two-way solenoid valve (17) are connected in parallel and then are connected between the first outdoor coil pipe (3) and the first plate heat exchanger (6), the third throttling device (19) and the second two-way solenoid valve (18) are connected in parallel and then are connected between the first plate heat exchanger (6) and the indoor coil pipe (7), the flow direction of the refrigerant is switched by the first two-way solenoid valve (17) and the second two-way solenoid valve (18), so that the switching of cooling and heating and the heat storage/heat extraction from the water storage tank mechanism is realized.
2. The combined operation system of the air source heat pump air conditioner and the heat pump water heater as claimed in claim 1, wherein the first plate heat exchanger (6) is connected with the water storage tank mechanism through a water pipe and performs heat exchange;
the first outdoor coil (3) and the indoor coil (7) are respectively connected with the air of the environment through air channels and perform heat exchange.
3. The system of claim 1, wherein the air source heat pump water heater mechanism comprises a second compressor (10), a third four-way reversing valve (11), a fourth four-way reversing valve (13), a second outdoor coil (12), a second throttling device (14), a second plate heat exchanger (16) and a third plate heat exchanger (15);
the flow direction of the refrigerant is switched by the third four-way reversing valve (11) and the fourth four-way reversing valve (13), so that the refrigeration and heating as well as the heat storage/heat extraction from the water storage tank are switched.
4. The system of claim 3, wherein the first port, the second port, the third port and the fourth port of the third four-way reversing valve (11) are respectively connected with the outlet end of the second compressor (10), the second plate heat exchanger (16), the inlet end of the second compressor (10) and the second outdoor coil (12) through refrigerant pipes;
a first interface, a second interface, a third interface and a fourth interface of the fourth four-way reversing valve (13) are respectively connected with a second outdoor coil (12), a third plate heat exchanger (15), a second plate heat exchanger (16) and a second throttling device (14) through refrigerant pipes, and the second throttling device (14) is connected with the third plate heat exchanger (15) through the refrigerant pipes;
the second plate heat exchanger (16) is used for introducing hot water through a water pipe, and the third plate heat exchanger (15) is connected with the water storage tank mechanism through a water pipe and exchanges heat;
the second outdoor coil (12) is respectively connected with the air of the environment through an air duct and performs heat exchange.
5. The system of claim 1, wherein the air source heat pump water heater mechanism comprises a second compressor (10), a third four-way reversing valve (11), a third two-way solenoid valve (20), a fourth two-way solenoid valve (21), a second outdoor coil (12), a second throttling device (14), a fourth throttling device (22), a second plate heat exchanger (16) and a third plate heat exchanger (15);
the flow direction of the refrigerant is switched by the third two-way electromagnetic valve (20) and the fourth two-way electromagnetic valve (21), so that the cooling and heating as well as the heat storage/heat extraction from the water storage tank are switched.
6. The system of claim 5, wherein the second throttling device (14) is connected in parallel with the third two-way solenoid valve (20) and then connected between the second outdoor coil (12) and the third plate heat exchanger (15), and the fourth throttling device (22) is connected in parallel with the fourth two-way solenoid valve (21) and then connected between the second plate heat exchanger (16) and the third plate heat exchanger (15).
7. The system of claim 1, wherein the water storage tank mechanism comprises a water storage tank, a first water pump (8) and a second water pump (9);
and water is pumped from the water storage tank through the first water pump (8) and the second water pump (9), so that heat exchange between the air source heat pump air conditioning mechanism and the air source heat pump water heater mechanism is realized.
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| CN111121133A (en) * | 2020-01-06 | 2020-05-08 | 中国科学院广州能源研究所 | Hot water combined supply system applied by low-grade multi-heat source combination and control method thereof |
| CN111795517A (en) * | 2020-06-17 | 2020-10-20 | 同济大学 | Air source heat pump based on liquid excess cold and heat recovery defrosting technology |
| CN112665183B (en) * | 2021-01-20 | 2022-07-22 | 同济大学 | Air source heat pump double-water-tank hot water system and control method thereof |
| CN114413362B (en) * | 2022-01-21 | 2023-04-28 | 宁波奥克斯电气股份有限公司 | Coupling system of air conditioner and heat pump water heater and control method thereof |
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| JP4949325B2 (en) * | 2008-06-03 | 2012-06-06 | 本田技研工業株式会社 | Cogeneration equipment |
| CN101514845B (en) * | 2009-03-25 | 2011-11-23 | 滁州扬子必威中央空调有限公司 | Novel efficient high temperature air-source heat pump hot water unit |
| CN103411351B (en) * | 2013-08-19 | 2015-06-17 | 东南大学 | Heat-source tower heat pump for realizing solution regeneration and heat reutilization on basis of vacuum boiling |
| CN105333641B (en) * | 2014-07-02 | 2017-10-03 | 约克广州空调冷冻设备有限公司 | Air-source air conditioning and water heating system |
| CN105135676A (en) * | 2015-10-10 | 2015-12-09 | 浙江万宝新能源科技有限公司 | Cascade heat accumulating type air source heat pump water heater |
| CN208652794U (en) * | 2018-08-02 | 2019-03-26 | 北京庆达节能环保工程技术有限公司 | A kind of trilogy supply air-conditioning ground heating hot-water heating system |
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