CN111271893A - Air-conditioning heat pump hot water system and control method thereof - Google Patents

Air-conditioning heat pump hot water system and control method thereof Download PDF

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Publication number
CN111271893A
CN111271893A CN202010120254.2A CN202010120254A CN111271893A CN 111271893 A CN111271893 A CN 111271893A CN 202010120254 A CN202010120254 A CN 202010120254A CN 111271893 A CN111271893 A CN 111271893A
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CN
China
Prior art keywords
heating
water
hot water
starting
refrigeration
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Pending
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CN202010120254.2A
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Chinese (zh)
Inventor
喻宝生
张树前
孙建良
王磊
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Zhejiang Zhongguang Electric Appliances Co Ltd
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Zhejiang Zhongguang Electric Appliances Co Ltd
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Priority to CN202010120254.2A priority Critical patent/CN111271893A/en
Publication of CN111271893A publication Critical patent/CN111271893A/en
Pending legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • 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
    • 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
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • 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
    • 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
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Abstract

The invention provides an air-conditioning heat pump hot water system and an operation method thereof, belonging to the technical field of refrigeration air-conditioning and heat pumps. The water heater solves the problems that heating and hot water heating cannot be really realized in the prior art. The air-conditioning heat pump hot water system comprises a heat pump hot water subsystem and an air-conditioning subsystem, wherein the heat pump hot water subsystem comprises a first compressor, a double four-way valve assembly, a first air side heat exchanger, a first hot water side heat exchanger, an air-conditioning side heat exchanger and a first throttling element, the hot water side heat exchanger is communicated with a water tank through a hot water side water inlet pipe and a hot water side water outlet pipe, and a hot water pump and the like are arranged on the hot water side water inlet pipe and/or the hot water side water. The air-conditioning heat pump hot water system and the control method thereof have the advantages that: the water heater solves the problems of installation land occupation and high investment and operation cost in areas needing refrigeration, heating and hot water due to the adoption of an air conditioner and a water heater, and solves the problem that heating and hot water cannot be realized in the true sense at present.

Description

Air-conditioning heat pump hot water system and control method thereof
Technical Field
The invention relates to the technical field of refrigeration air conditioners and heat pumps, in particular to a triple supply system which integrates refrigeration, heating and hot water production and can simultaneously produce heat and hot water or simultaneously produce refrigeration and hot water.
Background
The existing air-conditioning heat pump hot water unit, namely a triple supply unit, is not a true triple supply unit, but only divides hot water from a condenser into two paths in a heating mode on an air-conditioning cold and hot water unit, one path is connected with an air disc for heating, the other path is connected with a water tank for supplying domestic hot water, but refrigeration can not be realized while heating water, and some triple supply units have refrigeration, heating and hot water heating functions, but can not realize hot water while heating. .
Disclosure of Invention
A first object of the present invention is to provide an air conditioning heat pump hot water system that solves the above problems.
The second purpose of the present invention is to provide a method for operating and controlling an air-conditioning heat pump hot water system, which uses the above air-conditioning heat pump hot water system to realize five modes, namely single refrigeration, single heating, single hot water heating, simultaneous heating and hot water heating, and simultaneous refrigeration and hot water heating.
In order to achieve the purpose, the invention adopts the following technical scheme: the invention relates to an air-conditioning heat pump hot water system, which comprises a heat pump hot water subsystem and an air-conditioning subsystem, wherein the heat pump hot water subsystem comprises a compressor I, a double four-way valve component, a wind side heat exchanger I, a hot water side heat exchanger, an air-conditioning side heat exchanger and a throttle component I, the hot water side heat exchanger is communicated with a water tank through a hot water side water inlet pipe and a hot water side water outlet pipe, a hot water pump is arranged on the hot water side water inlet pipe and/or the hot water side water outlet pipe, the air-conditioning side heat exchanger is communicated with a user use side heat exchanger in an air conditioner through an air-conditioning side water inlet pipe and an air-conditioning side water outlet pipe, an air-conditioning water pump is arranged on the air-conditioning side water inlet pipe and/or the air-conditioning side water outlet pipe, the double four-way valve component, the air-conditioning subsystem comprises a compressor II, a four-way valve III, a wind-side heat exchanger II and a throttle member II, the four-way valve III is respectively communicated with the compressor II, the wind-side heat exchanger II and the air-conditioning side heat exchanger, and the compressor II, the wind-side heat exchanger II and the throttle member II form another path for the circulation of the refrigerant.
In the air-conditioning heat pump hot water system, the double four-way valve assembly comprises a first four-way valve and a second four-way valve, the first four-way valve is respectively communicated with the exhaust end and the suction end of the first compressor, a port on the second four-way valve and a refrigerant port on the air-conditioning side heat exchanger, and the second four-way valve is respectively communicated with a port on the first four-way valve, a refrigerant port on the hot water side heat exchanger and a refrigerant port on the first air side heat exchanger.
In the air-conditioning heat pump hot water system, the refrigerant sub-pipe assembly includes a first refrigerant sub-pipe, a second refrigerant sub-pipe, a third refrigerant sub-pipe, a fourth refrigerant sub-pipe and a fifth refrigerant sub-pipe, the first refrigerant sub-pipe is disposed between another refrigerant port on the hot water side heat exchanger and one port of the first throttling element, the second refrigerant sub-pipe is disposed between another port of the first throttling element and another refrigerant port on the air-conditioning side heat exchanger, the third refrigerant sub-pipe is disposed between the second refrigerant sub-pipe and another refrigerant port on the first air side heat exchanger, the fourth refrigerant sub-pipe is disposed on the second refrigerant sub-pipe at a position between the third refrigerant sub-pipe and one end of another refrigerant port adjacent to the air-conditioning side heat exchanger, and the fifth refrigerant sub-pipe is disposed between the first refrigerant sub-pipe and the third refrigerant sub-pipe.
In the air-conditioning heat pump hot water system, the valve assembly includes an on-off valve subassembly composed of a valve with an on-off function, and the on-off valve subassembly includes a first electromagnetic valve disposed on the second refrigerant sub-pipe and a second electromagnetic valve disposed on the third refrigerant sub-pipe.
In the air-conditioning heat pump hot water system, the valve assembly further comprises a check valve subassembly for preventing the counter flow of the refrigerant, wherein the check valve subassembly comprises a first check valve arranged on the first refrigerant sub-pipe and only allowing the refrigerant to flow to the first throttling element, a second check valve arranged on the fifth refrigerant sub-pipe and only allowing the refrigerant to flow to the first refrigerant sub-pipe, a third check valve arranged on the third refrigerant sub-pipe and positioned between the second solenoid valve and the fifth refrigerant sub-pipe and only allowing the refrigerant to flow in the direction away from the second solenoid valve, a fourth check valve arranged on the fourth refrigerant sub-pipe and only allowing the refrigerant to flow to the first refrigerant sub-pipe, and a fifth check valve arranged on the second refrigerant sub-pipe and positioned between the first solenoid valve and the fourth refrigerant sub-pipe and only allowing the refrigerant to flow in the direction away from the first solenoid valve.
In the air-conditioning heat pump hot water system, the air supplementing assembly is arranged between the first refrigerant sub-pipe and the first refrigerant main pipe which is positioned between the double four-way valve assembly and the air suction end on the first compressor.
In the air-conditioning heat pump hot water system, the air supplement component comprises a refrigerant air supplement sub-pipe, the refrigerant air supplement sub-pipe is arranged between the first refrigerant sub-pipe and a first refrigerant main pipe between the double four-way valve component and the air suction end on the compressor I, and the refrigerant air supplement sub-pipe is sequentially provided with a third electromagnetic valve and a third throttling element towards the first refrigerant main pipe.
The control method of the air-conditioning heat pump hot water system is characterized by comprising the following steps:
after the single refrigeration mode is selected to enter, judging whether a single refrigeration starting condition is met, if so, entering and completing a single refrigeration running process, otherwise, judging whether a single refrigeration standby condition is met, if so, entering and completing a single refrigeration standby process, and circulating the steps until the mode is exited;
selecting a single heating mode to enter, judging whether a single heating starting condition is met, if so, entering and completing a single heating operation process, otherwise, judging whether a single heating standby condition is met, if so, entering and completing a single heating standby process, and circulating the steps until the mode is exited;
selecting to enter a single hot water making mode, judging whether a single hot water making starting condition is met, if so, entering and completing a single hot water making operation flow, otherwise, judging whether a single hot water making standby condition is met, if so, entering and completing a single hot water making standby flow, and circulating the steps until the mode is exited;
selecting a mode of entering refrigeration and heating water, judging whether the starting condition of the refrigeration and heating water is met, if so, entering and completing a running process of the refrigeration and heating water, otherwise, judging whether the standby condition of the refrigeration and heating water is met, if so, entering and completing a standby process of the refrigeration and heating water, and circulating the steps until the mode is exited;
and selecting to enter a heating and hot water making mode, judging whether the starting conditions of heating and hot water making are met, if so, entering and finishing a heating and hot water making operation flow, otherwise, judging whether the standby conditions of heating and hot water making are met, if so, entering and finishing a heating and hot water making standby flow, and repeating the steps until the mode is exited.
In the control method of the air-conditioning heat pump hot water system, the single refrigeration operation flow comprises a single refrigeration operation flow I and a single refrigeration operation flow II, the single refrigeration starting condition comprises a single refrigeration starting condition I and a single refrigeration starting condition II, the single refrigeration operation flow I is entered if the single refrigeration starting condition I is met, the single refrigeration operation flow II is entered if the single refrigeration starting condition II is met, and the single refrigeration starting condition I comprises a single refrigeration operation flow IIT2+TReturn difference 1＞TInto≥T2+TReturn difference 2The T2 is the preset air-conditioning refrigeration set temperature, TIntoFor detecting the inlet water temperature, T, of the air conditionerReturn difference 1Setting temperature T for preset first water temperature return differenceReturn difference 2Setting the temperature for the preset second water temperature return difference, wherein the single refrigeration starting condition II comprises TInto≥T2+TReturn difference 1The single refrigeration operation process I comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of an air conditioner side water flow switch, delaying S2, starting a fan, electrifying a first electromagnetic valve and electrifying a second four-way valve, starting a compressor, wherein S1 is preset first delay time, S2 is preset second delay time, the single refrigeration operation process II comprises the steps of starting the air conditioner water pump, delaying S1, detecting the closing signal of the air conditioner side water flow switch, delaying S2, starting the fan, the solenoid valve, electrifying the four-way valve, delaying S3, starting the compressor, delaying S4, starting the compressor, detecting the S3 is preset third delay time, and delaying S4 is preset fourth delay time, and the single refrigeration standby condition comprises T3IntoT2 is not more than, the single refrigeration standby process comprises the first compressor stop, the second compressor stop, the time delay S4, the first fan stop and the second fan stop, if the system is in the shutdown state or the alarm state, the first electromagnetic valve, the second four-way valve lose power and the air-conditioning water pump stops running after the time delay S5, and the S5 is the preset fifth time delay;
the single heating operation process comprises a single heating operation process I and a single heating operation process II, the single heating starting condition comprises a single heating starting condition I and a single heating starting condition II, the single heating operation process I is entered if the single heating starting condition I is met, otherwise, the single heating operation process II is entered if the single heating starting condition II is met, and the single heating starting condition I comprises T3-TReturn difference 2≥TInto＞T3-TReturn difference 1The T3 is a preset heating set temperature of the air conditioner, and the single heating starting condition II comprises TInto≤T3-TReturn difference 1The single heating operation process I comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, starting a fan II, electrifying a four-way valve III, delaying S3, starting a compressor II and packing a single heating operation process IIThe method comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch at the air conditioner side, starting a fan I, a fan II, electrifying an electromagnetic valve II, electrifying a four-way valve I and a four-way valve III, delaying S3, starting a compressor II, delaying S4, starting the compressor I, and performing single heating standby conditions comprising TIntoT3, wherein the single heating standby flow comprises a first compressor stop, a second compressor stop, a time delay S4, a first fan stop and a second fan stop, and if the system is in a shutdown state or an alarm state, a second electromagnetic valve, a first four-way valve, a third four-way valve and an air-conditioning water pump stop running after S5 is delayed;
the single-heating water starting condition comprises TWater tank≤T1-TReturn difference 1The T isWater tankFor the detected water tank temperature and the preset water tank set temperature of T1, the single-system hot water operation process comprises the steps of starting a hot water pump, delaying S1, detecting a closing signal of a water flow switch on a hot water side, starting a fan I, electrifying an electromagnetic valve II, delaying S3, starting a compressor I, and enabling the single-system hot water to stand by under the condition that T is includedWater tankT1, the single-water-making standby flow comprises the first stop of the compressor, the delay of S4 and the first stop of the fan, and if the system is in a shutdown state or an alarm state at the moment, the delay of S5 is carried out, then the electromagnetic valve II is powered off, and the hot water pump stops running;
the refrigerating and heating water operation flow comprises a refrigerating and heating water operation flow I, a refrigerating and heating water operation flow II, a refrigerating and heating water operation flow III, a refrigerating and heating water operation flow IV and a refrigerating and heating water operation flow V, the refrigerating and heating water starting conditions comprise a refrigerating and heating water starting condition I, a refrigerating and heating water starting condition II, a refrigerating and heating water starting condition III, a refrigerating and heating water starting condition IV and a refrigerating and heating water starting condition V, if the refrigerating and heating water starting condition I is met, the refrigerating and heating water operation flow I is entered, if the refrigerating and heating water starting condition II is met, the refrigerating and heating water operation flow II is entered, if the refrigerating and heating water starting condition III is met, the refrigerating and heating water operation flow III is entered, if the refrigerating and heating water starting condition IV is met, the refrigerating and heating water operation flow IV is entered, if the starting condition V of refrigeration and heating water is met, entering a refrigeration and heating water operation flow V, wherein the starting condition I of refrigeration and heating water comprises T2+TReturn difference 1＞TInto≥T2+TReturn difference 2And TWater tank≤T1-TReturn difference 1The starting conditions of refrigeration and heating water II comprise TInto≥T2+TReturn difference 1And TWater tank≤T1-TReturn difference 1The starting conditions of refrigeration and heating water III comprise TWater tank≤T1-TReturn difference 1The refrigeration and heating water starting condition IV comprises T2+ TReturn difference 1＞TInto≥T2+TReturn difference 2The refrigeration and heating water starting condition V comprises TInto≥T2+TReturn difference 1The refrigeration and heating water operation flow I comprises starting a hot water pump, an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch at the air conditioner and the hot water side, delaying S2, electrifying a solenoid valve, delaying S3, starting a compressor, and the refrigeration and heating water operation flow II comprises starting the hot water pump, the air conditioner water pump, delaying S1, detecting a closing signal of the water flow switch at the air conditioner and the hot water side, delaying S2, starting a fan, electrifying a solenoid valve, delaying S3, starting a compressor, delaying S4, starting a compressor, starting a refrigeration and heating water operation flow III comprises starting the hot water pump, delaying S1, detecting a closing signal of the water flow switch at the hot water side, delaying S2, starting a fan, electrifying a four-way valve, delaying S3, starting a compressor, starting a refrigeration and heating water operation flow IV comprises starting the water pump at the air conditioner water pump, delaying S1, detecting a closing signal of the water flow switch at the air conditioner, the time delay S2, the first fan, the first electromagnetic valve, the second four-way valve, the time delay S3, the first compressor, the refrigeration and hot water operation process V comprises the steps of starting the air conditioner water pump, the time delay S1, detecting the closing signal of the air conditioner side water flow switch, the time delay S2, the first fan, the second fan and the first electromagnetic valve are started, the first electromagnetic valve is electrified, the four-way valve II is powered on, the time delay S3 is realized, the compressor I is started, the time delay S4 is realized, the compressor II is started, the refrigerating and hot water making standby conditions comprise a refrigerating and hot water making standby condition I, a refrigerating and hot water making standby condition II and a refrigerating and hot water making standby condition III, the refrigerating and hot water making standby flow comprises a refrigerating and hot water making standby flow I, a refrigerating and hot water making standby flow II and a refrigerating and hot water making standby flow III, the refrigerating and hot water making standby flow I is started if the refrigerating and hot water making standby condition I is met, and the refrigerating and hot water making standby flow I is started if the refrigerating and hot water making standby condition II is met.A hot water standby flow II, entering a refrigeration and hot water heating standby flow III if a refrigeration and hot water heating standby condition III is met, wherein the refrigeration and hot water heating standby condition I comprises TWater tankNot less than T1 and TIntoNot more than T2, and the standby conditions of refrigeration and hot water production II comprise TWater tankNot less than T1, and the standby condition of refrigeration and hot water production III includes TIntoT2 is not more than, the refrigeration + hot water preparation standby flow I comprises a compressor first stop, a compressor second stop, a time delay S4, a fan first stop, a fan second stop, a time delay S5 and a hot water pump stop running, if the system is in a shutdown state or an alarm state at the moment, the solenoid valve first power-off and the air conditioner water pump stop running, the refrigeration + hot water preparation standby flow II comprises a fan first start, a time delay S2, a four-way valve second power-on, a time delay S5 and a hot water pump stop running, the refrigeration + hot water preparation standby flow III comprises a compressor second stop, a fan first running, a time delay S2, a fan second running, a solenoid valve second power-on and a solenoid valve first power-off;
the heating and hot water making operation process comprises a heating and hot water making operation process I and a heating and hot water making operation process II, the heating and hot water making starting condition comprises a heating and hot water making starting condition I and a heating and hot water making starting condition II, if the heating and hot water making starting condition I is met, the heating and hot water making operation process I is entered, if the heating and hot water making starting condition II is met, the heating and hot water making operation process II is entered, and the heating and hot water making starting condition I comprises TWater tank≤T1-TReturn difference 1The heating and hot water starting conditions II comprise TInto≤T3-TReturn difference 2The heating and water-heating operation process I comprises a hot water pump, the time delay S1 is realized, a hot water side water flow switch closing signal is detected, the time delay S2 is realized, the first fan is started, the second electromagnetic valve is powered, the time delay S3 is realized, the first compressor is started, the heating and water-heating operation process II comprises an air conditioner water pump, the time delay S1 is realized, an air conditioner side water flow switch closing signal is detected, the time delay S2 is realized, the second fan is started, the four-way valve is powered, the time delay S3 is realized, the second compressor is started, the heating and water-heating standby conditions comprise a heating and water-heating standby condition I and a heating and water-heating standby condition II, the heating and water-heating standby processes comprise a heating and water-heating standby process I and a heating and water-heating standby process II, and if the heatingIf the standby condition I of heating and hot water making is met, the standby condition II of heating and hot water making is entered, wherein the standby condition I of heating and hot water making comprises TWater tankNot less than T1 and TInto≥T3-TReturn difference 2The standby conditions of heating and hot water heating II comprise TIntoNot less than T3 and TWater tank≥T1-TReturn difference 1The heating and hot water making standby process I comprises a compressor I shutdown, time delay S4 and a fan I shutdown, the heating and hot water making standby process II comprises a compressor I shutdown and a compressor II shutdown, a fan I shutdown and a fan II shutdown, and if the system is in a shutdown state or an alarm state at the moment, the power loss of a solenoid valve II, a four-way valve I and a four-way valve III and the stop of an air-conditioning water pump are delayed after S5.
In the above method for operating an air-conditioning heat pump hot water system, the operation process of heating and hot water production i further includes the step of starting the compressor and then performing the operation process TWater tankAfter T is not less than T1, if T is not less than TInto≤T3-TReturn difference 2If the four-way valve is powered on until TWater tank≤T1-TReturn difference 1And when the four-way valve is in power failure, the four-way valve loses power.
Compared with the prior art, this air conditioner heat pump hot water system's advantage lies in: the water heater solves the problems of installation land occupation and high investment and operation cost in areas needing refrigeration, heating and hot water due to the adoption of an air conditioner and a water heater, and solves the problem that heating and hot water cannot be realized in the true sense at present. .
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 provides a schematic diagram of the operation of a single refrigeration mode in an embodiment of the present invention.
FIG. 2 provides a flow chart of a single refrigeration mode in an embodiment of the present invention.
Figure 3 provides a schematic diagram of the operation of a single heating mode in an embodiment of the invention.
FIG. 4 provides a flow chart of a single heating mode in an embodiment of the present invention.
Fig. 5 provides a schematic diagram of the operation of the single hot water mode in an embodiment of the present invention.
Fig. 6 provides a flow chart of a single hot water mode in an embodiment of the present invention.
Fig. 7 provides a schematic diagram of the operation of the cooling and heating water modes in an embodiment of the present invention.
Fig. 8 provides a flow chart of a first operation flow in the cooling and heating water modes in an embodiment of the present invention.
Fig. 9 provides a flowchart of a second operation procedure in the cooling and heating water modes in the embodiment of the present invention.
Fig. 10 provides a flow chart of the operation flow three in the cooling and heating water modes in the embodiment of the present invention.
Fig. 11 provides a flow chart of the fourth operational flow in the cooling and heating water modes in an embodiment of the present invention.
Fig. 12 provides a flow chart of the flow five of the operations in the cooling and heating water modes in an embodiment of the present invention.
Fig. 13 provides a flow chart of a first standby flow in the cooling and heating water modes in an embodiment of the present invention.
Fig. 14 provides a flowchart of a standby flow in the cooling and heating water modes in the embodiment of the present invention.
Fig. 15 provides a flowchart of a standby flow three in the cooling and heating water modes in the embodiment of the present invention.
Fig. 16 provides a schematic diagram of the operation of the heating and hot water modes in an embodiment of the present invention.
FIG. 17 provides a flow chart of the heating and hot water modes in an embodiment of the present invention.
In the figure, a heat pump hot water subsystem 1, an air-conditioning subsystem 2, a first refrigerant main pipe a, a second refrigerant main pipe b, a first compressor 101, a second compressor 102, a first four-way valve 201, a second four-way valve 202, a third four-way valve 203, a hot water side heat exchanger 301, a first wind side heat exchanger 302, a second wind side heat exchanger 303, a second air-conditioning side heat exchanger 304, a first fan 305, a second fan 306, a first throttling part 401, a second throttling part 402, a third throttling part 403, a first electromagnetic valve 501, a second electromagnetic valve 502, a third electromagnetic valve 503, a first one-way valve 601, a second one-way valve 602, a third one-way valve 603, a fourth one-way valve 604, a fifth one-way valve 605, a first reservoir 701, a second reservoir 702, a first gas-liquid separator 801, a second gas-liquid separator 802, a hot water side water inlet pipe 902, a hot water side water outlet pipe 903, an air-side water inlet pipe 904, a fourth refrigerant sub-pipe 909, a fifth refrigerant sub-pipe 910, and a gas supplement sub-pipe 911.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1, 3, 5, 7 and 16, the air-conditioning heat pump hot water system comprises a heat pump hot water subsystem and an air-conditioning subsystem, wherein the heat pump hot water subsystem comprises a first compressor 101, a double four-way valve assembly, a first air-side heat exchanger 302, a first hot water-side heat exchanger 301, a first air-conditioning-side heat exchanger 304 and a first throttling element 401, the hot water-side heat exchanger 301 is communicated with a water tank through a hot water-side water inlet pipe 902 and a hot water-side water outlet pipe 903, a hot water pump is arranged on the hot water-side water inlet pipe 902 and/or the hot water-side water outlet pipe 903, the air-conditioning-side heat exchanger 304 is communicated with a user-using-side heat exchanger in an air conditioner through an air-conditioning-side water inlet pipe 904 and an air-conditioning-side water outlet pipe 905, an air-conditioning pump is arranged on the, One refrigerant port on the first air side heat exchanger 302 and one refrigerant port on the first air-conditioning side heat exchanger 304 are communicated, the other refrigerant port on the hot water side heat exchanger 301, the other refrigerant port on the first air side heat exchanger 302, the other refrigerant port on the first air-conditioning side heat exchanger 304 and the first throttling element 401 are connected through a refrigerant sub-pipeline assembly, a valve assembly is arranged on the refrigerant sub-pipeline assembly, any two of the first compressor 101, the first throttling element 401 and the three heat exchangers in the heat pump hot water subsystem form a passage for refrigerant circulation through the double four-way valve assembly and the valve assembly, the air-conditioning subsystem comprises a second compressor 102, a third four-way valve 203, a second air side heat exchanger 303 and a second throttling element 402, the third four-way valve 203 is respectively communicated with the second compressor 102, the second air side heat exchanger 303 and the first air-conditioning side heat exchanger 304, and the second refrigerant port on the second air-conditioning side heat exchanger 304 and the second throttling element 402 form another passage for circulation through a second refrigerant A path of travel.
Through one or two of the above two paths for the refrigerant to circularly operate, five modes of single refrigeration, single heating, single hot water heating, heating + hot water heating, and refrigeration + hot water heating are realized.
It should be noted that, the hot water side heat exchanger 301 transfers heat of a refrigerant in operation in the heat pump hot water subsystem to water flowing into the hot water side heat exchanger through the hot water side water inlet pipe 902, and the water absorbing the heat flows to the water tank through the hot water side water outlet pipe 903; the first throttling element 401 and the second throttling element 402 are electronic throttling valves, and of course, other components with throttling functions, such as capillary tubes and the like, can be adopted according to the needs; the air-conditioning side heat exchanger 304 transfers heat of the operating refrigerant in the heat pump hot water subsystem and the air-conditioning subsystem to water flowing into the air-conditioning side water inlet pipe 904, and the water absorbing heat or releasing heat flows to the user-using side heat exchanger in the air conditioner through the air-conditioning side water outlet pipe 905, so that the user of the air conditioner can heat or refrigerate at the position.
Specifically, the dual four-way valve assembly includes a first four-way valve 201 and a second four-way valve 202, the first four-way valve 201 is respectively communicated with an exhaust end and a suction end of a first compressor 101, a port on the second four-way valve 202 and a refrigerant port on an air-conditioning side heat exchanger 304, the second four-way valve 202 is respectively communicated with a port on the first four-way valve 201, a refrigerant port on a hot water side heat exchanger 301 and a refrigerant port on a wind side heat exchanger 302, as shown in fig. 1, 3, 5, 7 and 16, as an embodiment, a C port on the first four-way valve 201 is communicated with a D port on the second four-way valve 202, a D port and an S port on the first four-way valve 201 are respectively communicated with an exhaust end and a suction end of the first compressor 101, an E port on the first four-way valve 201 is communicated with a refrigerant port on the air-, The S port and the E port are respectively communicated with a refrigerant port on the hot water side heat exchanger 301, a suction end on the compressor first 101, and a refrigerant port on the air side heat exchanger first 302, and the connection mode between the four-way valve first 201 and the four-way valve second 202 and the connection mode between the S port and the air side heat exchanger first 302 and the air conditioner side heat exchanger 304 may be different from that of the present embodiment.
In one embodiment, as shown in fig. 1, 3, 5, 7 and 16, the refrigerant sub-pipe assembly includes a first refrigerant sub-pipe 906, a second refrigerant sub-pipe 907, a third refrigerant sub-pipe 908, a fourth refrigerant sub-pipe 909 and a fifth refrigerant sub-pipe 910, the first refrigerant sub-pipe 906 is disposed between another refrigerant port of the hot water side heat exchanger 301 and one port of the throttle one 401, the second refrigerant sub-pipe 907 is disposed between another port of the throttle one 401 and another refrigerant port of the air-conditioning side heat exchanger 304, the third refrigerant sub-pipe 908 is disposed between the second refrigerant sub-pipe 907 and another refrigerant port of the air-conditioning side heat exchanger 302, the fourth refrigerant sub-pipe 909 is disposed at a portion of the second refrigerant sub-pipe 907 between the third refrigerant sub-pipe 908 and one end adjacent to another port of the air-conditioning side heat exchanger 304, the fifth refrigerant sub-pipe 910 is disposed between the first refrigerant sub-pipe 906 and the third refrigerant sub-pipe 907, of course, the number and distribution positions of the tubes in the refrigerant sub-pipeline assembly can be different from the present embodiment according to the requirement.
Additionally, as an embodiment, as shown in fig. 1, 3, 5, 7 and 16, the valve assembly includes an on-off valve subassembly composed of a valve with an on-off function, and the on-off valve subassembly includes a first solenoid valve 501 disposed on the second refrigerant sub-pipe 907 and a second solenoid valve 502 disposed on the third refrigerant sub-pipe 908.
The valve having an opening/closing function herein is an electromagnetic valve, but it is needless to say that a valve having an opening/closing function having another structure may be selected as necessary.
Preferably, the valve assembly further includes a check valve subassembly for preventing the backflow of the refrigerant, and the check valve subassembly includes a first check valve 601 disposed on the first refrigerant sub-pipe 906 and allowing the refrigerant to flow only to the first refrigerant sub-pipe 906, a second check valve 602 disposed on the fifth refrigerant sub-pipe 910 and allowing the refrigerant to flow only to the first refrigerant sub-pipe 906, a third check valve 603 disposed on the third refrigerant sub-pipe 908 and allowing the refrigerant to flow only in a direction away from the second solenoid valve 502 and between the second solenoid valve 502 and the fifth refrigerant sub-pipe 910, a fourth check valve 604 disposed on the fourth refrigerant sub-pipe 909 and allowing the refrigerant to flow only to the first refrigerant sub-pipe 906, and a fifth check valve 605 disposed on the second refrigerant sub-pipe 907 and allowing the refrigerant to flow only in a direction away from the first solenoid valve 501 and between the first solenoid valve 501 and the fourth refrigerant sub-pipe 909.
It should be noted that the type of the valve, the number of the valves and the arrangement of the valves in the refrigerant sub-pipeline assembly are not exclusive, and may be additionally arranged according to the requirement.
Preferably, a gas supplementing assembly is arranged between the first refrigerant sub-pipe 906 and the first refrigerant main pipe a located between the double four-way valve assembly and the suction end of the first compressor 101, specifically, the gas supplementing assembly comprises a refrigerant gas supplementing sub-pipe 911, the refrigerant gas supplementing sub-pipe 911 is arranged between the first refrigerant sub-pipe 906 and the first refrigerant main pipe a located between the double four-way valve assembly and the suction end of the first compressor 101, and the refrigerant gas supplementing sub-pipe 911 is sequentially provided with a solenoid valve iii 503 and a throttling element iii 403 towards the first refrigerant main pipe a. The purpose of the air supplement component is to increase the temperature of the gaseous refrigerant sucked by the suction end of the first compressor 101 according to needs, so that the operation energy efficiency of the subsystem is improved.
It should be noted that the third throttle 403 is a capillary tube, but the third throttle 403 and the third solenoid 503 may be replaced by an electronic throttle.
The control method of the air-conditioning heat pump hot water system is characterized in that the system is the air-conditioning heat pump hot water system, and five modes of single cooling, single heating, single hot water heating, heating + hot water heating and cooling + hot water heating can be realized through the system.
The five modes are realized by a four-way valve operation one 201, a four-way valve two 202, a four-way valve three 203, a solenoid valve one 501 and a solenoid valve two 502, and the following table lists the states of the valves in each mode.
Mode(s) Electromagnetic valve 1 Electromagnetic valve II Four-way valve 1 Four-way valve 2 Four-way valve III
Single refrigeration ON OFF OFF ON OFF
Heating only OFF ON ON OFF ON
Single hot water OFF ON OFF OFF OFF
Refrigeration and hot water ON OFF OFF OFF OFF
Heating and hot water OFF ON OFF OFF ON
In addition, in the system, the default states of the first compressor 101, the second compressor 102, the first four-way valve 201, the second four-way valve 202, the third four-way valve 203, the first fan 305 and the second fan 306 are all power-off states, and the system is shut down when the 5 modes are switched (that is, the first compressor 101, the second compressor 102, the first four-way valve 201, the second four-way valve 202, the third four-way valve 203, the first fan 305 and the second fan 306 are all switched to the power-off states when the modes are switched).
Additionally, the following table lists the parameters involved in the present manipulation method.
Figure BDA0002392744720000091
Figure BDA0002392744720000101
The operation steps of the single refrigeration mode in the present manipulation method are as follows.
After entering the single refrigeration mode shown in fig. 1 and 2, judging whether a single refrigeration starting condition is met, if so, entering and completing a single refrigeration running process, otherwise, judging whether a single refrigeration standby condition is met, if so, entering and completing a single refrigeration standby process, and repeating the steps until the mode is exited.
Specifically, as shown in fig. 2, the single refrigeration operation flow includes a single refrigeration operation flow i and a single refrigeration operation flow ii, the single refrigeration start condition includes a single refrigeration start condition i and a single refrigeration start condition ii, the single refrigeration operation flow i is entered if the single refrigeration start condition i is satisfied, and the single refrigeration operation flow ii is entered if the single refrigeration start condition ii is satisfied.
As shown in FIG. 2, the single refrigeration start condition I includes T2+ TReturn difference 1＞TInto≥T2+TReturn difference 2The single refrigeration operation process I comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, delaying S2, starting a first fan 305, electrifying a first electromagnetic valve 501, electrifying a second four-way valve 202, starting a first compressor 101, wherein S1 is preset first delay time, and S2 is preset second delay time.
As shown in FIG. 2, the single refrigeration start condition II includes TInto≥T2+TReturn difference 1The single refrigeration operation process II comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, delaying S2, starting a first fan 305 and a second fan 306, electrifying a first electromagnetic valve 501, electrifying a second four-way valve 202, delaying S3, starting a first compressor 101, delaying S4 and starting a second compressor 102.
As shown in FIG. 2, the single refrigeration standby condition includes TIntoAnd (4) less than or equal to T2, wherein the single refrigeration standby process comprises the steps of stopping the first compressor 101, stopping the second compressor 102, delaying S4, stopping the first fan 305 and stopping the second fan 306, and if the system is in a shutdown state or an alarm state, delaying S5, then powering off the first electromagnetic valve 501, the second four-way valve 202 and stopping the operation of the air-conditioning water pump.
The working principle of the single refrigeration mode is as follows: the working process of the heat pump hot water subsystem in the mode comprises the following steps: high-temperature and high-pressure refrigerant coming out of an exhaust port of a first compressor 101 flows to a first wind side heat exchanger 302 through a first four-way valve 201 and a second four-way valve 202 respectively to release heat to the environment and become normal-temperature and high-pressure liquid refrigerant, the normal-temperature and high-pressure liquid refrigerant enters a first liquid storage device 701 through a first one-way valve 601, the coming out super-cooled refrigerant is throttled and decompressed through a first throttling part 401 to become low-temperature and low-pressure saturated refrigerant, the low-temperature and low-pressure saturated refrigerant enters a first air conditioner side heat exchanger 304 through a first electromagnetic valve 501 and a fifth one-way valve 605 to absorb heat in water (heat release, temperature reduction and refrigeration), the coming out superheated refrigerant after heat exchange; the working process of the air conditioning subsystem in the mode is as follows: high-temperature and high-pressure refrigerant coming out of an exhaust port of the second compressor 102 enters the second air-side heat exchanger 303 through the third four-way valve 203 and releases heat to the environment to become normal-temperature and high-pressure liquid refrigerant, the refrigerant is throttled and depressurized through the second throttling element 402 and then enters the second liquid reservoir 702 to the heat exchanger on the air conditioner side to absorb heat in water (water releases heat and cools and refrigerates), superheated refrigerant coming out of heat exchange flows to an air suction port of the second compressor 102 after passing through the third four-way valve 203 to the second gas-liquid separator 802, and finally flows out of the.
A specific example of the present single cooling mode operation method is given below.
In the case, the refrigeration set temperature T2 of the air conditioner is 15 ℃ and TReturn difference 1At 5 ℃ and TReturn difference 2Is at 2 ℃:
if the actually detected air conditioner inlet water temperature TIntoAt 21 ℃ (T)Into≥T2+TReturn difference 1) The actual water temperature is far away from the target water temperature, and the first compressor 101 and the second compressor 102 are both started to accelerate the water temperature to drop;
if TIntoAt 19.5 ℃ (T2+ T)Return difference 1≥TInto≥T2+TReturn difference 1) When the actual water temperature is not greatly different from the target water temperature, the second compressor 102 does not only start the first compressor 101 system to enable the water temperature to slightly and slowly approach the target water temperature, so that energy waste caused by excessive fluctuation of water temperature adjustment is avoided;
if TIntoWhen the temperature is reduced to 14.5 ℃ (T)IntoT2) the actual water temperature has reached the target set point and both the first 101 and second 102 compressors are shut down.
The operation steps of the single heating mode in the present manipulation method are as follows.
And selecting to enter a single heating mode shown in fig. 3 and 4, judging whether a single heating starting condition is met, if so, entering and completing a single heating operation flow, otherwise, judging whether a single heating standby condition is met, if so, entering and completing a single heating standby flow, and repeating the steps until the mode is exited.
Specifically, as shown in fig. 4, the single heating operation flow includes a single heating operation flow i and a single heating operation flow ii, the single heating start condition includes a single heating start condition i and a single heating start condition ii, the single heating operation flow i is entered if the single heating start condition i is satisfied, and the single heating operation flow ii is entered if the single heating start condition ii is satisfied.
As shown in FIG. 4, the single heating start condition I includes T3-TReturn difference 2≥TInto＞T3-TReturn difference 1And the single heating operation process I comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, starting a second fan 306, electrifying a third four-way valve 203, delaying S3 and starting a second compressor 102.
As shown in FIG. 4, the single heating start condition II includes TInto≤T3-TReturn difference 1And the single heating operation flow II comprises the steps of starting the air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, starting the first fan 305, the second fan 306, electrifying the second electromagnetic valve 502, electrifying the first four-way valve 201, electrifying the third four-way valve 203, delaying S3, starting the second compressor 102, delaying S4 and starting the first compressor 101.
As shown in FIG. 4, the single heating standby condition includes TIntoThe single heating standby flow comprises the first compressor 101 stopping, the second compressor 102 stopping, the time delay S4, the first fan 305 stopping and the second fan 306 stopping, and if the system is in a shutdown state or an alarm state, the time delay S5 is carried out, then the solenoid valve II 502, the four-way valve I201, the four-way valve III 203 lose power, and the air-conditioning water pump stops running.
The working principle of the single heating mode is as follows: the working process of the heat pump hot water subsystem in the mode comprises the following steps: high-temperature and high-pressure refrigerant coming out of an air outlet of the first compressor 101 enters the air-conditioning side heat exchanger 304 through the four-way valve 201 respectively to release heat (absorb heat and raise temperature and heat) into water to become normal-temperature and high-pressure liquid refrigerant, the normal-temperature and high-pressure liquid refrigerant enters the first liquid reservoir 701 through the four-way valve 604, the super-cooled refrigerant coming out is throttled and reduced in pressure through the first throttling part 401 to become low-temperature and low-pressure saturated refrigerant, the low-temperature and low-pressure saturated refrigerant enters the first wind side heat exchanger 302 through the second electromagnetic valve 502 and the third one-way valve 603 to absorb heat in air, the superheated refrigerant coming out after heat exchange passes through the second four-way valve; the working process of the air conditioning subsystem in the mode is as follows: the high-temperature high-pressure refrigerant from the air outlet of the second compressor 102 enters the air-conditioning side heat exchanger 304 through the third four-way valve 203 to release heat (absorb heat to raise temperature and heat) into water and turns into normal-temperature high-pressure liquid refrigerant, the refrigerant flows out of the second liquid reservoir 702, is throttled and reduced in pressure by the second throttling element 402 and then enters the air-side heat exchanger to absorb heat in air, the superheated refrigerant after heat exchange flows to the second compressor 102 air inlet through the third four-way valve 203 and the second gas-liquid separator 802, and finally flows out of the air outlet after being compressed and boosted by the.
A specific example of the manipulation method of the single heating mode is given below.
In the case, the refrigeration set temperature T3 of the air conditioner is 40 ℃, TReturn difference 1At 5 ℃ and TReturn difference 2Is at 2 ℃:
if the actually detected air conditioner inlet water temperature TIntoAt 33 ℃ (T)Into≤T3-TReturn difference 1) The actual water temperature is far away from the target water temperature, and the first compressor 101 and the second compressor 102 are both started to accelerate the water temperature to rise;
if TIntoAt 36.5 ℃ (T3-T)Return difference 2≥TInto≥T3-TReturn difference 1) When the actual water temperature is not greatly different from the target water temperature, the system of the compressor II 102 does not only start the compressor I101 to enable the water temperature to slightly and slowly approach the target water temperature, so that energy waste caused by excessive fluctuation of water temperature adjustment is avoided;
if TIntoWhen the temperature rises to 40.5 ℃ (T)IntoT3) the actual water temperature has reached the target set point and both compressor one 101 and compressor two 102 are shut down.
The operation steps of the single heating water mode in the control method are as follows.
And selecting to enter a single hot water making mode shown in fig. 5 and 6, judging whether a single hot water making starting condition is met, if so, entering and completing a single hot water making operation process, otherwise, judging whether a single hot water making standby condition is met, if so, entering and completing a single hot water making standby process, and repeating the steps until the mode is exited.
Specifically, as shown in fig. 6, the single heating water start condition includes TWater tank≤T1-TReturn difference 1The T isWater tankFor the detected water tank temperature and the preset water tank set temperature of T1, the single-heating operation process comprises the steps of starting a hot water pump, delaying S1, detecting a closing signal of a water flow switch at a hot water side, starting a first fan 305, electrifying a second electromagnetic valve 502, delaying S3 and starting a first compressor 101.
As shown in fig. 6, the stand-by condition of single heating water includes TWater tankThe standby flow of the single-system hot water comprises that the first compressor 101 is shut down, S4 is delayed, the first fan 305 is shut down, if the system is shut down or in an alarm state, the second electromagnetic valve 502 is powered off after S5 is delayed, and the hot water pump stops running;
the working principle of the single hot water making mode is as follows: the working process of the heat pump hot water subsystem in the mode comprises the following steps: high-temperature and high-pressure refrigerant coming out of an exhaust port of a first compressor 101 enters a hot water side heat exchanger 301 through a first four-way valve 201 to release heat (absorb heat and raise temperature of water and produce hot water) into water to become normal-temperature and high-pressure liquid refrigerant, the normal-temperature and high-pressure liquid refrigerant enters a first liquid storage device 701 through a first one-way valve 601, the coming out super-cooled refrigerant is throttled and reduced pressure through a first throttling part 401 to become low-temperature and low-pressure saturated refrigerant, the low-temperature and low-pressure saturated refrigerant enters a first wind side heat exchanger 302 through a second electromagnetic valve 502 and a third one-way valve 603 to absorb heat in air, the heat-exchanged super-heated refrigerant flows to a first gas; the working process of the air conditioning subsystem in the mode is as follows: and does not work.
A specific example of the control method of the single heating water mode is given below.
The set temperature T1 of the water tank is 50 ℃, TReturn difference 1Is at 5 ℃:
when the actually detected water tank temperature TWater tankAt 44 ℃ (T)Water tank≤T1-TReturn difference 1) Starting a first compressor 101, and starting to raise the water temperature;
when T isWater tankWhen the temperature rises to 50.5 ℃ (T)Water tankT1) when the actual water temperature in the water tank reaches the target set value, the first compressor 101 is shut down.
The operation steps of the refrigeration and heating water mode in the control method are as follows.
Selecting a mode of entering refrigeration and heating water as shown in fig. 7 to 15, judging whether a starting condition of the refrigeration and heating water is met, if so, entering and completing a running process of the refrigeration and heating water, otherwise, judging whether a standby condition of the refrigeration and heating water is met, if so, entering and completing a standby process of the refrigeration and heating water, and circulating the steps until the mode is exited.
Specifically, as shown in fig. 8 to 12, the cooling + heating water operation flow includes a cooling + heating water operation flow i, a cooling + heating water operation flow ii, a cooling + heating water operation flow iii, a cooling + heating water operation flow iv, and a cooling + heating water operation flow v, the cooling + heating water start condition includes a cooling + heating water start condition i, a cooling + heating water start condition ii, a cooling + heating water start condition iii, a cooling + heating water start condition iv, and a cooling + heating water start condition v, the cooling + heating water operation flow i is entered if the cooling + heating water start condition i is satisfied, the cooling + heating water operation flow ii is entered if the cooling + heating water start condition ii is satisfied, the cooling + heating water operation flow iii is entered if the cooling + heating water start condition iii is satisfied, the cooling + heating water operation flow iv is entered if the cooling + heating water start condition iv is satisfied, and entering a refrigeration and heating water operation flow V if the refrigeration and heating water starting condition V is met.
As shown in FIG. 8, the cooling + heating water start condition I includes T2+ TReturn difference 1＞TInto≥T2+TReturn difference 2And TWater tank≤T1-TReturn difference 1The operation flow I of refrigeration and hot water production comprises starting a hot water pump and an air conditionerAnd (4) adjusting the water pump, delaying S1, detecting a closing signal of a water flow switch at the air conditioner side and the hot water side, delaying S2, electrifying the first electromagnetic valve 501, delaying S3 and starting the first compressor 101.
As shown in fig. 9, the cooling + heating water start condition ii includes TInto≥T2+TReturn difference 1And TWater tank≤T1-TReturn difference 1And the refrigeration and hot water production operation process II comprises the steps of starting a hot water pump and an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner and the hot water side, delaying S2, starting a second fan 306, electrifying a first electromagnetic valve 501, delaying S3, starting a first compressor 101, delaying S4 and starting a second compressor 102.
As shown in fig. 10, the cooling + heating water start condition iii includes TWater tank≤T1-TReturn difference 1The refrigeration and heating water operation process III comprises the steps of starting a hot water pump, delaying S1, detecting a closing signal of a water flow switch on a hot water side, delaying S2, starting a first fan 305, electrifying a second four-way valve 202, delaying S3 and starting a first compressor 101.
As shown in fig. 11, the cooling + heating water start condition iv includes T2+ TReturn difference 1＞TInto≥T2+TReturn difference 2The operation process IV of refrigeration and water heating comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, delaying S2, starting a first fan 305, electrifying a first electromagnetic valve 501, electrifying a second four-way valve 202, delaying S3 and starting a first compressor 101.
As shown in fig. 12, the cooling + heating water start condition v includes TInto≥T2+TReturn difference 1The operation process V of refrigeration and heating water comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, delaying S2, starting a first fan 305 and a second fan 306, electrifying a first electromagnetic valve 501, electrifying a second four-way valve 202, delaying S3, starting a first compressor 101, delaying S4 and starting a second compressor 102.
Additionally, as shown in fig. 13 to 15, the cooling + heating water standby condition includes a cooling + heating water standby condition i, a cooling + heating water standby condition ii, and a cooling + heating water standby condition iii, the cooling + heating water standby flow includes a cooling + heating water standby flow i, a cooling + heating water standby flow ii, and a cooling + heating water standby flow iii, and if the cooling + heating water standby condition i is satisfied, the cooling + heating water standby flow i is entered, if the cooling + heating water standby condition ii is satisfied, the cooling + heating water standby flow ii is entered, and if the cooling + heating water standby condition iii is satisfied, the cooling + heating water standby flow iii is entered.
As shown in fig. 13, the cooling + heating standby condition i includes TWater tankNot less than T1 and TIntoT2 is less than or equal to, the refrigeration and hot water production standby process I comprises the steps of stopping the compressor I101, stopping the compressor II 102, delaying S4, stopping the fan I305, stopping the fan II 306, delaying S5, stopping the hot water pump, if the system is in a shutdown state or an alarm state at the moment, the electromagnetic valve I501 loses power, the air conditioner water pump stops running,
as shown in fig. 14, the cooling + heating standby condition ii includes TWater tankNot less than T1, the cooling and hot water preparing standby flow II comprises the starting of the first fan 305, the time delay S2, the electrification of the second four-way valve 202, the time delay S5, the stop of the hot water pump,
as shown in fig. 15, the cooling + heating standby condition iii includes TIntoAnd (3) less than or equal to T2, wherein the refrigerating and hot water making standby flow III comprises the steps of stopping the compressor II 102, operating the fan I305, delaying S2, operating the fan II 306, electrifying the electromagnetic valve II 502 and losing the electricity of the electromagnetic valve I501.
The working principle of the refrigeration and heating water mode is as follows: the working process of the heat pump hot water subsystem in the mode comprises the following steps: high-temperature and high-pressure refrigerant coming out of an exhaust port of a first compressor 101 enters a hot water side heat exchanger 301 through a first four-way valve 201 to release heat (absorb heat and raise temperature of water and produce hot water) into water to become normal-temperature and high-pressure liquid refrigerant, the normal-temperature and high-pressure liquid refrigerant enters a first liquid storage device 701 through a first one-way valve 601, the coming out supercooled refrigerant is throttled and reduced in pressure through a first throttling part 401 to become low-temperature and low-pressure saturated refrigerant, the low-temperature and low-pressure saturated refrigerant enters an air conditioner side heat exchanger 304 through a first electromagnetic valve 501 and a fifth one-way valve 605 to absorb heat (release heat and lower temperature and refrigerate) in water, the heat-exchanged superheated refrigerant; the working process of the air conditioning subsystem in the mode is as follows: high-temperature and high-pressure refrigerant coming out of an exhaust port of the second compressor 102 enters the second wind side heat exchanger 303 through the third four-way valve 203 and releases heat to the environment to be changed into normal-temperature and high-pressure liquid refrigerant, the refrigerant is throttled and depressurized through the second throttling element 402 and then enters the second liquid reservoir 702 to the heat exchanger 304 on the air conditioner side to absorb heat in water (water releases heat and cools and refrigerates), superheated refrigerant coming out of heat exchange flows to an air suction port of the second compressor 102 after passing through the third four-way valve 203 to the second gas-liquid separator 802, and finally flows out of.
A specific example of the operation and control method of the cooling and heating water mode is given below.
The set temperature T2 of the air conditioner is 15 ℃, the set temperature T1 of the water tank is 50 ℃, and TReturn difference 1At 5 ℃ and TReturn difference 2Is at 2 ℃:
1) the operation flow is divided into five conditions:
if the actually detected air conditioner inlet water temperature TIntoAt 19 ℃ (T2+ T)Return difference 1≥TInto≥T2+TReturn difference 2)、TWater tankAt 44 ℃ (T)Water tank≤T1-TReturn difference 1) If yes, starting the first compressor 101, refrigerating while the heat pump hot water subsystem operates to produce hot water, and keeping the air conditioning subsystem in a standby state;
if the actually detected air conditioner inlet water temperature TIntoAt 21 ℃ (T)Into≥T2+TReturn difference 1)、TWater tankAt 44 ℃ (T)Water tank≤T1-TReturn difference 1) If the system runs to produce hot water and simultaneously refrigerates the first compressor 101, the second compressor 102 is started, and the air-conditioning subsystem runs to a refrigeration mode;
if the actually detected air conditioner inlet water temperature TIntoAt 16.5 ℃ (T)Into≤T2+TReturn difference 2)、TWater tankAt 44 ℃ (T)Water tank≤T1-TReturn difference 1) If the temperature of the air conditioner subsystem is higher than the set temperature, the first compressor 101 is started, the heat pump hot water subsystem only operates to produce hot water, and the air conditioner subsystem is in a standby state;
if the actually detected air conditioner inlet water temperature TIntoAt 19 ℃ (T2+ T)Return difference 1≥TInto≥T2+TReturn difference 2)、TWater tankAt 50.5 ℃ (T)Water tankNot less than T1), compressor 101, starting, wherein the heat pump hot water subsystem only operates for refrigeration, and the air conditioning subsystem is in a standby state;
if the actually detected air conditioner inlet water temperature TIntoAt 21 ℃ (T)Into≥T2+TReturn difference 1)、TWater tankAt 50.5 ℃ (T)Water tankNot less than T1), starting the first compressor 101, enabling the heat pump hot water subsystem to only run for refrigeration, starting the second compressor 102, and enabling the air conditioning subsystem to run for a refrigeration mode;
2) the standby flow is divided into three cases:
if the actually detected air conditioner inlet water temperature TIntoAt 14.5 ℃ (T)Into≤T2)、TWater tankAt 50.5 ℃ (T)Water tankNot less than T1), stopping the first compressor 101 and the second compressor 102 to be in a standby state, and stopping the hot water pump;
if the actually detected air conditioner inlet water temperature TIntoAt 15.5 ℃ (T)Into＞T2)、TWater tankAt 50.5 ℃ (T)Water tankNot less than T1), starting the first compressor 101, converting the hot water subsystem of the heat pump into single refrigeration operation, and stopping the operation of the hot water pump;
if the actually detected air conditioner inlet water temperature TIntoAt 14.5 ℃ (T)Into≤T2)、TWater tankAt 49.5 ℃ (T)Water tankIf the temperature is less than T1), the first compressor 101 is started, the heat pump hot water subsystem is converted into single-water-making operation, the second compressor 102 is stopped, and the air-conditioning subsystem is in a standby state.
The operation steps of the heating and water heating mode in the control method are as follows.
And selecting to enter a heating and hot water making mode shown in fig. 16 and 17, judging whether a heating and hot water making starting condition is met, if so, entering and completing a heating and hot water making operation process, otherwise, judging whether a heating and hot water making standby condition is met, if so, entering and completing a heating and hot water making standby process, and circulating the steps until the mode is exited.
Specifically, as shown in fig. 17, the heating + heating water operation flow includes a heating + heating water operation flow i and a heating + heating water operation flow ii, the heating + heating water start condition includes a heating + heating water start condition i and a heating + heating water start condition ii, if the heating + heating water start condition i is satisfied, the heating + heating water operation flow i is entered, and if the heating + heating water start condition ii is satisfied, the heating + heating water operation flow ii is entered.
As shown in FIG. 17, the heating + heating water start condition I includes TWater tank≤T1-TReturn difference 1The heating and hot water production operation process I comprises the steps of starting a hot water pump, delaying S1, detecting a closing signal of a water flow switch on a hot water side, delaying S2, starting the first fan 305, electrifying the second electromagnetic valve 502, delaying S3 and starting the first compressor 101.
Preferably, as shown in fig. 17, the heating + hot water operation flow i further includes when T is after the compressor one 101 is startedWater tankAfter T is not less than T1, if T is not less than TInto≤T3-TReturn difference 2And the four-way valve I201 is electrified till TWater tank≤T1-TReturn difference 1And when the four-way valve I201 loses power.
As shown in fig. 17, the heating + heating water start condition ii includes TInto≤T3-TReturn difference 2And the heating and hot water producing operation process II comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, delaying S2, starting a second fan 306, electrifying a third four-way valve 203, delaying S3 and starting a second compressor 102.
The heating and hot water making standby condition comprises a heating and hot water making standby condition I and a heating and hot water making standby condition II, the heating and hot water making standby flow comprises a heating and hot water making standby flow I and a heating and hot water making standby flow II, if the heating and hot water making standby condition I is met, the heating and hot water making standby flow I is entered, otherwise, if the heating and hot water making standby condition II is met, the heating and hot water making standby flow II is entered.
The standby conditions I of heating and hot water heating comprise TWater tankNot less than T1 and TInto≥T3-TReturn difference 2And the heating and hot water standby process I comprises the first compressor 101 shutdown, the time delay S4 and the first fan 305 shutdown.
The standby conditions of heating and hot water heating II comprise TIntoNot less than T3 and TWater tank≥T1-TReturn difference 1The standby process II of heating and water heating comprises a compressor IAnd (4) stopping the machine 101, stopping the machine 102, stopping the machine 305, stopping the machine 306, delaying the power failure of the electromagnetic valve II 502, the four-way valve I201, the four-way valve III 203 and stopping the operation of the air-conditioning water pump after S5 if the system is in a shutdown state or an alarm state.
The working principle of the heating and water heating mode is as follows: the working process of the heat pump hot water subsystem in the mode comprises the following steps: high-temperature and high-pressure refrigerant coming out of an exhaust port of a first compressor 101 enters a hot water side heat exchanger 301 through a first four-way valve 201 to release heat (absorb heat and raise temperature of water and produce hot water) into water to become normal-temperature and high-pressure liquid refrigerant, the normal-temperature and high-pressure liquid refrigerant enters a first liquid storage device 701 through a first one-way valve 601, the coming out supercooled refrigerant is throttled and reduced in pressure through a first throttling part 401 to become low-temperature and low-pressure saturated refrigerant, the low-temperature and low-pressure saturated refrigerant enters a wind side heat exchanger through a second electromagnetic valve 502 and a third one-way valve 603 to absorb heat in air, the heat-exchanged superheated refrigerant flows to a first gas-liquid; the working process of the air conditioning subsystem in the mode is as follows: the high-temperature high-pressure refrigerant from the air outlet of the second compressor 102 enters the air-conditioning side heat exchanger 304 through the third four-way valve 203 to release heat (absorb heat to raise temperature and heat) into water and turns into normal-temperature high-pressure liquid refrigerant, the refrigerant flows out of the second liquid reservoir 702, is throttled and reduced in pressure by the second throttling element 402 and then enters the air-side heat exchanger to absorb heat in air, the superheated refrigerant after heat exchange flows to the second compressor 102 air inlet through the third four-way valve 203 and the second gas-liquid separator 802, and finally flows out of the air outlet after being compressed and boosted by the.
A specific example of the control method of the heating + hot water mode is given below.
The set temperature T3 of air conditioning and heating is 40 ℃, the set temperature T1 of the water tank is 50 ℃, and TReturn difference 1At 5 ℃ and TReturn difference 2Is at 2 ℃:
when the actually detected water tank temperature TWater tankIs 44 ℃ (T)Water tank≤T1-TReturn difference 1) And the temperature T of the inlet water of the air conditionerIntoAt 36 ℃ (T)Into≤T3-TReturn difference 2) The first compressor 101 is started and preferentially enters a hot water heating mode, and the second compressor 102 is systematically startedEntering a heating mode;
when T isWater tankIncreasing the temperature to 50.1 ℃ (T)Water tank≧ T1):
A. at this time, if TIntoIs 38.5 ℃ (T)Into≥T3-TReturn difference 2) The first compressor 101 is shut down;
B. at this time, if TIntoIs 37.5 ℃ (T)Into≤T3-TReturn difference 2) The four-way valve I201 is switched to a heating mode, and the heat pump hot water subsystem and the air conditioner subsystem both operate in the heating mode;
C. when T isIntoTo 40.2 ℃ (T)IntoT3) is stopped for both the first compressor 101 and the second compressor 102.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the heat pump hot water subsystem 1, the air-conditioning subsystem 2, the first refrigerant main pipe a, the second refrigerant main pipe b, the first compressor 101, the second compressor 102, the first four-way valve 201, the second four-way valve 202, the third four-way valve 203, the hot water side heat exchanger 301, the first wind side heat exchanger 302, the second wind side heat exchanger 303, the air-conditioning side heat exchanger 304, the first fan 305, the second fan 306, the first throttle part 401, the second throttle part 402, the third throttle part 403, the first solenoid valve 501, the second solenoid valve 502, the third solenoid valve 503, the first check valve 601, the second check valve 602, the third check valve 603, the fourth check valve 604, the fifth check valve 605, the first reservoir 701, the second reservoir 702, the first gas-liquid separator 801, the second gas-hot water separator 802, the hot water side water inlet pipe 902, the refrigerant side outlet pipe 903, the air-conditioning side inlet pipe 904, the air-side outlet pipe 905, the first refrigerant sub-pipe 906, the second, The terms of the fourth refrigerant sub-pipe 909, the fifth refrigerant sub-pipe 910, and the gas sub-pipe 911 are not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (10)

1. The utility model provides an air conditioner heat pump hot water system, includes heat pump hot water subsystem and air conditioner subsystem, its characterized in that: the heat pump hot water subsystem comprises a compressor I (101), a double four-way valve assembly, a wind side heat exchanger I (302), a hot water side heat exchanger (301), an air conditioner side heat exchanger (304) and a throttling element I (401), wherein the hot water side heat exchanger (301) is communicated with a water tank through a hot water side water inlet pipe (902) and a hot water side water outlet pipe (903), a hot water pump is arranged on the hot water side water inlet pipe (902) and/or the hot water side water outlet pipe (903), the air conditioner side heat exchanger (304) is communicated with a user use side heat exchanger in an air conditioner through an air conditioner side water inlet pipe (904) and an air conditioner side water outlet pipe (905), an air conditioner water pump is arranged on the air conditioner side water inlet pipe (904) and/or the air conditioner side water outlet pipe (905), and an exhaust end and an air suction end on the compressor I (101) are respectively communicated with the double four-way valve, A refrigerant port on the hot water side heat exchanger (301), a refrigerant port on the wind side heat exchanger (302) and a refrigerant port on the air conditioner side heat exchanger (304) are communicated, the other refrigerant port on the hot water side heat exchanger (301), the other refrigerant port on the wind side heat exchanger (302), the other refrigerant port on the air conditioner side heat exchanger (304) and the first throttling element (401) are connected through a refrigerant sub-pipeline assembly, a valve assembly is arranged on the refrigerant sub-pipeline assembly, any two of the compressor (101), the first throttling element (401) and the three heat exchangers in the heat pump hot water subsystem form a passage for the refrigerant to circularly run through the double four-way valve assembly and the valve assembly, the air conditioner subsystem comprises a second compressor (102), a third four-way valve (203), a second wind side heat exchanger (303) and a second throttling element (402), and the four-way valve III (203) is respectively communicated with the compressor II (102), the wind side heat exchanger II (303) and the air conditioner side heat exchanger (304), and the compressor II (102), the wind side heat exchanger II (303), the air conditioner side heat exchanger (304) and the throttling element II (402) form another passage for circulating the refrigerant through a second refrigerant header pipe (b).
2. A heat pump water heating system with an air conditioner according to claim 1, characterized in that the double four-way valve assembly comprises a first four-way valve (201) and a second four-way valve (202), the first four-way valve (201) is respectively communicated with the exhaust end and the suction end of the first compressor (101), a port on the second four-way valve (202) and a refrigerant port on the heat exchanger (304) at the air conditioner side, and the second four-way valve (202) is respectively communicated with a port on the first four-way valve (201), a refrigerant port on the heat exchanger (301) at the hot water side and a refrigerant port on the heat exchanger (302) at the wind side.
3. An air-conditioning heat pump hot water system as claimed in claim 1, wherein the refrigerant sub-pipeline assembly comprises a first refrigerant sub-pipe (906), a second refrigerant sub-pipe (907), a third refrigerant sub-pipe (908), a fourth refrigerant sub-pipe (909) and a fifth refrigerant sub-pipe (910), the first refrigerant sub-pipe (906) is arranged between another refrigerant port of the hot water side heat exchanger (301) and one port of the first throttling element (401), the second refrigerant sub-pipe (907) is arranged between another port of the first throttling element (401) and another refrigerant port of the air-conditioning side heat exchanger (304), the third refrigerant sub-pipe (908) is arranged between the second refrigerant sub-pipe (907) and another refrigerant port of the first air-side heat exchanger (302), and the fourth refrigerant sub-pipe (909) is arranged between the third refrigerant sub-pipe (908) and one end of another refrigerant port adjacent to the air-conditioning side heat exchanger (304) on the second refrigerant sub-pipe (907) The fifth refrigerant sub-pipe (910) is arranged between the first refrigerant sub-pipe (906) and the third refrigerant sub-pipe (908).
4. A heat pump water heating system with air conditioner according to claim 3, characterized in that the valve assembly comprises an on-off valve subassembly composed of a valve with on-off function, and the on-off valve subassembly comprises a first solenoid valve (501) arranged on the second refrigerant sub-pipe (907) and a second solenoid valve (502) arranged on the third refrigerant sub-pipe (908).
5. An air-conditioning heat pump hot water system as claimed in claim 4, wherein the valve assembly further comprises a check valve subassembly for preventing the backflow of the refrigerant, the check valve subassembly comprising a first check valve (601) disposed on the first refrigerant sub-pipe (906) for allowing the refrigerant to flow only to the first throttling member (401), a second check valve (602) disposed on the fifth refrigerant sub-pipe (910) for allowing the refrigerant to flow only to the first refrigerant sub-pipe (906), a third check valve (603) disposed on the third refrigerant sub-pipe (908) at a position between the second solenoid valve (502) and the fifth refrigerant sub-pipe (910) for allowing the refrigerant to flow only in a direction away from the second solenoid valve (502), a fourth check valve (604) disposed on the fourth refrigerant sub-pipe (909) for allowing the refrigerant to flow only to the first refrigerant sub-pipe (906), and a solenoid valve disposed on the second refrigerant sub-pipe (907) at a position between the first solenoid valve (501) and the fourth sub-pipe (909) And a check valve five (605) allowing the refrigerant to flow in a direction away from the solenoid valve one (501).
6. A heat pump water heating system with air conditioner according to claim 3, characterized in that an air supplement component is arranged between the first refrigerant sub-pipe (906) and the first refrigerant main pipe (a) between the double four-way valve component and the suction end of the first compressor (101).
7. An air-conditioning heat pump hot water system as claimed in claim 6, wherein the air supplement component comprises a refrigerant air supplement sub-pipe (911), the refrigerant air supplement sub-pipe (911) is arranged between the first refrigerant sub-pipe (906) and a first refrigerant main pipe (a) between the double four-way valve component and a suction end of the first compressor (101), and the refrigerant air supplement sub-pipe (911) is sequentially provided with a solenoid valve III (503) and a throttling element III (403) towards the first refrigerant main pipe (a).
8. A control method of an air-conditioning heat pump hot water system is characterized by comprising the following steps: the system is the air-conditioning heat pump hot water system as claimed in any one of claims 1 to 7, and the control method comprises the following steps:
after the single refrigeration mode is selected to enter, judging whether a single refrigeration starting condition is met, if so, entering and completing a single refrigeration running process, otherwise, judging whether a single refrigeration standby condition is met, if so, entering and completing a single refrigeration standby process, and circulating the steps until the mode is exited;
selecting a single heating mode to enter, judging whether a single heating starting condition is met, if so, entering and completing a single heating operation process, otherwise, judging whether a single heating standby condition is met, if so, entering and completing a single heating standby process, and circulating the steps until the mode is exited;
selecting to enter a single hot water making mode, judging whether a single hot water making starting condition is met, if so, entering and completing a single hot water making operation flow, otherwise, judging whether a single hot water making standby condition is met, if so, entering and completing a single hot water making standby flow, and circulating the steps until the mode is exited;
selecting a mode of entering refrigeration and heating water, judging whether the starting condition of the refrigeration and heating water is met, if so, entering and completing a running process of the refrigeration and heating water, otherwise, judging whether the standby condition of the refrigeration and heating water is met, if so, entering and completing a standby process of the refrigeration and heating water, and circulating the steps until the mode is exited;
and selecting to enter a heating and hot water making mode, judging whether the starting conditions of heating and hot water making are met, if so, entering and finishing a heating and hot water making operation flow, otherwise, judging whether the standby conditions of heating and hot water making are met, if so, entering and finishing a heating and hot water making standby flow, and repeating the steps until the mode is exited.
9. An operation and control method for an air-conditioning heat pump hot water system as claimed in claim 8, wherein the single refrigeration operation flow comprises a single refrigeration operation flow I and a single refrigeration operation flow II, the single refrigeration starting condition comprises a single refrigeration starting condition I and a single refrigeration starting condition II, the single refrigeration operation flow I is entered if the single refrigeration starting condition I is met, the single refrigeration operation flow II is entered if the single refrigeration starting condition II is met, and the single refrigeration starting condition I comprises T2+ TReturn difference 1＞TInto≥T2+TReturn difference 2The T2 is the preset air-conditioning refrigeration set temperature, TIntoFor detecting the inlet water temperature of the air conditioner、TReturn difference 1Setting temperature T for preset first water temperature return differenceReturn difference 2Setting the temperature for the preset second water temperature return difference, wherein the single refrigeration starting condition II comprises TInto≥T2+TReturn difference 1The single refrigeration operation process I comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of an air conditioner side water flow switch, delaying S2, starting a fan I (305), electrifying a solenoid valve I (501), electrifying a four-way valve II (202), starting a compressor I (101), wherein S1 is a preset first delay time, and S2 is a preset second delay time, the single refrigeration operation process II comprises the steps of starting the air conditioner water pump, delaying S1, detecting an closing signal of the air conditioner side water flow switch, delaying S2, starting the fan I (305), the fan II (306), electrifying the solenoid valve I (501), electrifying the four-way valve II (202), delaying S3, starting the compressor I (101), delaying S4, starting the compressor II (102), starting the S3 is a preset third delay time, and S4 is a preset fourth delay time, wherein the single refrigeration operation process condition comprises the step T of starting the air conditioner water pump and the condition that the compressor I (101) and the compressor II (102) are started, and the single refrigeration operation process condition comprises the step ofIntoT2 is not more than, the single refrigeration standby process comprises the steps of stopping the compressor I (101), stopping the compressor II (102), delaying S4, stopping the fan I (305) and stopping the fan II (306), delaying S5 for the first electromagnetic valve (501), the four-way valve II (202) lose power and stopping the air-conditioning water pump if the system is in a shutdown state or an alarm state, and the S5 is preset fifth delay time;
the single heating operation process comprises a single heating operation process I and a single heating operation process II, the single heating starting condition comprises a single heating starting condition I and a single heating starting condition II, the single heating operation process I is entered if the single heating starting condition I is met, otherwise, the single heating operation process II is entered if the single heating starting condition II is met, and the single heating starting condition I comprises T3-TReturn difference 2≥TInto＞T3-TReturn difference 1The T3 is a preset heating set temperature of the air conditioner, and the single heating starting condition II comprises TInto≤T3-TReturn difference 1The single heating operation process I comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch on the air conditioner side, starting a fan II (306), electrifying a four-way valve III (203), delaying S3, starting a compressor II (102), and performing heat exchangeThe single heating operation process II comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch at the air conditioner side, starting a first fan (305), a second fan (306), electrifying a second electromagnetic valve (502), electrifying a first four-way valve (201), electrifying a third four-way valve (203), delaying S3, starting a second compressor (102), delaying S4 and starting a first compressor (101), wherein the single heating standby condition comprises TIntoThe single heating standby flow comprises a first compressor (101) shutdown, a second compressor (102) shutdown, a time delay S4, a first fan (305) shutdown and a second fan (306) shutdown, and if the system is in a shutdown state or an alarm state, a second rear electromagnetic valve (502), a first four-way valve (201), a third four-way valve (203) lose power and an air-conditioning water pump stops running after a time delay S5;
the starting condition of the single heating water comprises TWater tank≤T1-TReturn difference 1The T isWater tankFor the detected water tank temperature and the preset water tank set temperature T1, the single-system hot water operation process comprises the steps of starting a hot water pump, delaying S1, detecting a closing signal of a water flow switch at a hot water side, starting a fan I (305), electrifying an electromagnetic valve II (502), delaying S3 and starting a compressor I (101), wherein the standby condition of the single-system hot water comprises the TWater tankThe standby flow of the single-heating water comprises that the compressor I (101) stops, S4 is delayed, the fan I (305) stops, if the system is in a shutdown state or an alarm state, the electromagnetic valve II (502) is powered off after S5 is delayed, and the hot water pump stops running;
the refrigerating and heating water operation process comprises a refrigerating and heating water operation process I, a refrigerating and heating water operation process II, a refrigerating and heating water operation process III, a refrigerating and heating water operation process IV and a refrigerating and heating water operation process V, the refrigerating and heating water starting conditions comprise a refrigerating and heating water starting condition I, a refrigerating and heating water starting condition II, a refrigerating and heating water starting condition III, a refrigerating and heating water starting condition IV and a refrigerating and heating water starting condition V, if the refrigerating and heating water starting condition I is met, the refrigerating and heating water operation process I is entered, if the refrigerating and heating water starting condition II is met, the refrigerating and heating water operation process II is entered, if the refrigerating and heating water starting condition III is met, the refrigerating and heating water operation process III is entered, and if the refrigerating and heating water starting condition III is full, the refrigerating and heating water operation process III is entered, and if the refrigerating and heating water starting condition V isIf the starting conditions of sufficient refrigeration and heating water IV are met, the operation flow enters a refrigeration and heating water operation flow IV, if the starting conditions of the refrigeration and heating water V are met, the operation flow enters a refrigeration and heating water operation flow V, and the refrigeration and heating water starting conditions I comprise T2+ TReturn difference 1＞TInto≥T2+TReturn difference 2And TWater tank≤T1-TReturn difference 1And the refrigeration and heating water starting condition II comprises TInto≥T2+TReturn difference 1And TWater tank≤T1-TReturn difference 1And the refrigeration and heating water starting condition III comprises TWater tank≤T1-TReturn difference 1And the refrigeration and heating water starting condition IV comprises T2+ TReturn difference 1＞TInto≥T2+TReturn difference 2The refrigeration and heating water starting condition V comprises TInto≥T2+TReturn difference 1The refrigeration and heating operation process I comprises the steps of starting a hot water pump, an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch at the air conditioner side and the hot water side, delaying S2, electrifying a first electromagnetic valve (501), delaying S3, starting a first compressor (101), the refrigeration and heating operation process II comprises the steps of starting the hot water pump and the air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch at the air conditioner side and the hot water side, delaying S2, starting a second fan (306), electrifying a first electromagnetic valve (501), delaying S3, starting a first compressor (101), delaying S4 and starting a second compressor (102), the refrigeration and heating operation process III comprises the steps of starting the hot water pump, delaying S1, detecting a closing signal of a water flow switch at the hot water side, delaying S2, starting a first fan (305), electrifying a second four-way valve (202), delaying S3 and starting a first compressor (101), the cooling and heating water operation process IV comprises the steps of starting an air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch at the air conditioner side, delaying S2, starting a fan I (305), electrifying a solenoid valve I (501), electrifying a four-way valve II (202), delaying S3, starting a compressor I (101), and the cooling and heating water operation process V comprises the steps of starting the air conditioner water pump, delaying S1, detecting a closing signal of a water flow switch at the air conditioner side, delaying S2, starting the fan I (305) and the fan II (306), electrifying the solenoid valve I (501), electrifying a four-way valve II (202), delaying S3, starting the compressor I (101), delaying S4 and starting the compressor II (102), wherein the cooling and heating water standby mode is standbyThe conditions comprise a refrigeration and hot water making standby condition I, a refrigeration and hot water making standby condition II and a refrigeration and hot water making standby condition III, wherein the refrigeration and hot water making standby flow comprises a refrigeration and hot water making standby flow I, a refrigeration and hot water making standby flow II and a refrigeration and hot water making standby flow III, the refrigeration and hot water making standby flow I is entered if the refrigeration and hot water making standby condition I is met, the refrigeration and hot water making standby flow II is entered if the refrigeration and hot water making standby condition II is met, the refrigeration and hot water making standby flow III is entered if the refrigeration and hot water making standby condition III is met, and the refrigeration and hot water making standby condition I comprises TWater tankNot less than T1 and TIntoT2 is not more than, the standby condition II of refrigeration and hot water production comprises TWater tankNot less than T1, the standby condition of refrigeration and heating water III includes TIntoT2 or less, wherein the refrigeration and hot water preparation standby flow I comprises a first compressor (101) shutdown, a second compressor (102) shutdown, a time delay S4, a first fan (305) shutdown, a second fan (306) shutdown, a time delay S5 and a hot water pump shutdown, if the system is in a shutdown state or an alarm state, a first electromagnetic valve (501) loses power and the air-conditioning water pump stops running, the refrigeration and hot water preparation standby flow II comprises a first fan (305) startup, a time delay S2, a second four-way valve (202) is powered on, a time delay S5 and the hot water pump stops running, and the refrigeration and hot water preparation standby flow III comprises a second compressor (102) shutdown, a first fan (305) running, a time delay S2, a second fan (306) running, a second electromagnetic valve (502) is powered on and a first electromagnetic valve (501) loses power;
heating + heating water operation flow including heating + heating water operation flow I and heating + heating water operation flow II, heating + heating water starting condition including heating + heating water starting condition I and heating + heating water starting condition II, if satisfy heating + heating water starting condition I then get into heating + heating water operation flow I, if satisfy heating + heating water starting condition II then get into heating + heating water operation flow II, heating + heating water starting condition I include TWater tank≤T1-TReturn difference 1And the heating and water heating starting condition II comprises TInto≤T3-TReturn difference 2The heating and hot water producing operation process I comprises the steps of starting a hot water pump, delaying S1 and detectingA hot water side water flow switch closing signal is received, time delay S2 is carried out, a first fan (305) is started, a second solenoid valve (502) is powered on, time delay S3 is carried out, a first compressor (101) is started, a heating and hot water making operation process II comprises starting an air conditioner water pump, time delay S1 is carried out, the air conditioner side water flow switch closing signal is detected, time delay S2 is carried out, a second fan (306) is started, a third four-way valve (203) is powered on, time delay S3 is carried out, a second compressor (102) is started, the heating and hot water making standby conditions comprise a heating and hot water making standby condition I and a heating and hot water making standby condition II, the heating and hot water making standby process comprises a heating and hot water making standby process I and a heating and hot water making standby process II, if the heating and hot water making standby condition I is met, the heating and hot water making standby process II is carried out, the standby conditions I of heating and hot water heating comprise TWater tankNot less than T1 and TInto≥T3-TReturn difference 2The standby condition of heating and hot water heating II comprises TIntoNot less than T3 and TWater tank≥T1-TReturn difference 1The heating and water heating standby process I comprises the first compressor (101) stopping, the time delay S4 is realized, the first fan (305) is stopped, the heating and water heating standby process II comprises the first compressor (101) stopping, the second compressor (102) stopping, the first fan (305) stopping and the second fan (306) stopping, and if the system is in a shutdown state or an alarm state at the moment, the power loss of the second electromagnetic valve (502), the first four-way valve (201), the third four-way valve (203) and the stop of the air-conditioning water pump are realized after the time delay S5.
10. An operation method for an air-conditioning heat pump hot water system as claimed in claim 9, wherein the heating + hot water operation process i further comprises the step of starting the compressor one (101) and then starting the compressor one (101) when T is reachedWater tankAfter T is not less than T1, if T is not less than TInto≤T3-TReturn difference 2If the four-way valve I (201) is electrified till TWater tank≤T1-TReturn difference 1And when the power is not supplied, the four-way valve I (201) loses power.
CN202010120254.2A 2020-02-26 2020-02-26 Air-conditioning heat pump hot water system and control method thereof Pending CN111271893A (en)

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CN112781274A (en) * 2020-12-25 2021-05-11 珠海格力电器股份有限公司 Heat pump unit control method
CN114151883A (en) * 2021-11-29 2022-03-08 宁波奥克斯电气股份有限公司 Air conditioning system and control method and device thereof
CN114413362A (en) * 2022-01-21 2022-04-29 宁波奥克斯电气股份有限公司 Air conditioner and heat pump water heater coupling system and control method thereof

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CN112781274A (en) * 2020-12-25 2021-05-11 珠海格力电器股份有限公司 Heat pump unit control method
CN114151883A (en) * 2021-11-29 2022-03-08 宁波奥克斯电气股份有限公司 Air conditioning system and control method and device thereof
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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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