CN110594920A - Air conditioner, heat pump system, heat pump control method, device and storage medium - Google Patents

Air conditioner, heat pump system, heat pump control method, device and storage medium Download PDF

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Publication number
CN110594920A
CN110594920A CN201910951293.4A CN201910951293A CN110594920A CN 110594920 A CN110594920 A CN 110594920A CN 201910951293 A CN201910951293 A CN 201910951293A CN 110594920 A CN110594920 A CN 110594920A
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CN
China
Prior art keywords
valve
mode
way reversing
port
electronic expansion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910951293.4A
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Chinese (zh)
Inventor
周鹏飞
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Nanjing Jinghua Intelligent Technology Co Ltd
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Nanjing Jinghua Intelligent Technology Co Ltd
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Priority to CN201910951293.4A priority Critical patent/CN110594920A/en
Publication of CN110594920A publication Critical patent/CN110594920A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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
    • 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
    • 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
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel

Abstract

The embodiment of the invention discloses an air conditioner, a heat pump system, a heat pump control method, a heat pump control device and a storage medium, wherein the heat pump system comprises: the double-stage compressor comprises a low-pressure stage cylinder, a high-pressure stage cylinder and an intermediate cavity, and the intermediate cavity is arranged between the low-pressure stage cylinder and the high-pressure stage cylinder; the system comprises a medium-temperature evaporator and a low-temperature evaporator which is connected with the medium-temperature evaporator in parallel, wherein the first end of the medium-temperature evaporator and the first end of the low-temperature evaporator are both communicated with a port B of a four-way reversing valve, and the second end of the medium-temperature evaporator and the second end of the low-temperature evaporator are both communicated with a port D of the four-way reversing valve; the fresh air heating function of the air conditioner is realized, and the service performance of the air conditioner is improved.

Description

Air conditioner, heat pump system, heat pump control method, device and storage medium
Technical Field
The embodiment of the invention relates to the technical field of air conditioners, in particular to an air conditioner, a heat pump system, a heat pump control method, a heat pump control device and a storage medium.
Background
Along with the increasing requirements of people on the comfort and the energy conservation of the living room environment, the independent temperature and humidity adjusting technology is more and more emphasized, and evaporators with two temperatures are required to respectively process the temperature and the humidity in an independent temperature and humidity adjusting system. However, in the prior art, the heat pump system cannot simultaneously heat two sets of evaporators for adjusting temperature and humidity, that is, under the heating condition in winter, the heat pump system cannot simultaneously heat in a temperature adjusting mode and a fresh air adjusting mode, and lacks a fresh air heating function, thereby limiting the service performance of the heat pump system.
Disclosure of Invention
Therefore, the embodiment of the invention provides an air conditioner, a heat pump system, a heat pump control method, a heat pump control device and a storage medium, and aims to solve the technical problem that the heat pump system in the prior art cannot realize heating in a fresh air mode.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to a first aspect of embodiments of the present invention, there is provided a heat pump system for an air conditioner, including:
the double-stage compressor comprises a low-pressure stage cylinder, a high-pressure stage cylinder and an intermediate cavity, and the intermediate cavity is arranged between the low-pressure stage cylinder and the high-pressure stage cylinder;
the system comprises a medium-temperature evaporator and a low-temperature evaporator connected in parallel with the medium-temperature evaporator, wherein the first end of the medium-temperature evaporator and the first end of the low-temperature evaporator are communicated with a port B of a four-way reversing valve, and the second end of the medium-temperature evaporator and the second end of the low-temperature evaporator are communicated with a port D of the four-way reversing valve.
Further, when the air conditioner is in a heating mode, the heating fluid passage comprises an outlet end of the high-pressure-stage cylinder, an opening a of the four-way reversing valve, an opening B of the four-way reversing valve, a solenoid valve V2, a solenoid valve V17, a medium-temperature evaporator, a low-temperature evaporator, a solenoid valve V5, an electronic expansion valve V6, a flash tank, an electronic expansion valve V8, a condenser, an opening D of the four-way reversing valve, an opening C of the four-way reversing valve, and an inlet end of the low-pressure-stage cylinder, which are sequentially communicated;
when the air conditioner is in the heating mode, the air conditioner can be simultaneously in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode;
when the air conditioner is in a fresh air heating mode, the heating fluid passage comprises an outlet end of the high-pressure-level cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, an electromagnetic valve V17, the low-temperature evaporator, the electronic expansion valve V6, the flash tank, the electronic expansion valve V8, the condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure-level cylinder which are sequentially communicated;
when the air conditioner is in a return air heating mode, the heating fluid passage comprises an outlet end of the high-pressure-level cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, a solenoid valve V2, a medium-temperature evaporator, a solenoid valve V5, an electronic expansion valve V6, a flash tank, an electronic expansion valve V8, a condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure-level cylinder which are sequentially communicated;
when the air conditioner is in an air-supplementing enthalpy-increasing mode, a part of heating fluid comprises the outlet end of the high-pressure-level cylinder, the port A of the four-way reversing valve, the port B of the four-way reversing valve, the low-temperature evaporator or the medium-temperature evaporator, the electromagnetic valve V6, the flash tank, the electromagnetic valve V3 and the middle cavity which are sequentially communicated through an air-supplementing passage.
Further, when the air conditioner is in a cooling temperature adjusting mode, the cooling fluid passage comprises an outlet end of the high-pressure stage cylinder, an opening a of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V7, the solenoid valve V4, the medium-temperature evaporator, the solenoid valve V1 and the intermediate chamber which are sequentially communicated;
when the air conditioner is in the refrigeration temperature regulation mode, the air conditioner is also in a refrigeration humidity regulation mode;
when the air conditioner is in a refrigeration humidity adjusting mode, the refrigeration humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V8 in a full-open state, an electronic expansion valve V6, a low-temperature evaporator and a solenoid valve V17 which are sequentially communicated, an opening B of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder.
Furthermore, a parallel branch where the medium temperature evaporator is located and a parallel branch where the low temperature evaporator is located are respectively provided with a flow regulating valve.
The invention also provides an air conditioner which comprises the heat pump system.
The present invention also provides a heat pump control method for controlling the operation of the heat pump system as described above, the method including:
acquiring an operation mode of an air conditioner;
when the air conditioner is judged to be in a heating mode, a first reversing instruction and a first valve switching instruction are sent, so that an opening A of the four-way reversing valve is communicated with an opening B, an opening D of the four-way reversing valve is communicated with an opening C, and a solenoid valve V2, a solenoid valve V5 and a solenoid valve V17, an electronic expansion valve V6 and an electronic expansion valve V8 are opened or adjusted in opening degree according to the first valve switching instruction, and a solenoid valve V1, a solenoid valve V3, a solenoid valve V4 and an electronic expansion valve V7 are closed according to the first valve switching instruction; the formed heating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, a solenoid valve V2 and a solenoid valve V17 which are sequentially communicated, and the medium-temperature evaporator, the low-temperature evaporator, the solenoid valve V5, the electronic expansion valve V6, the flash evaporator, the electronic expansion valve V8, the condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure stage cylinder are sequentially communicated;
when the air conditioner is in the heating mode, the air conditioner can be simultaneously or respectively in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode; the third sub-mode is opened or closed under the heating mode;
in the heating mode, the solenoid valve V17 is opened or closed to control the starting and stopping of the first sub-mode;
in the heating mode, the electromagnetic valve V2 and the electromagnetic valve V5 are opened or closed simultaneously to control the start and stop of the second sub-mode;
in the heating mode, the opening degree of the electronic expansion valve V6 is adjusted, and the solenoid valve V3 is opened or closed to control the start and stop of the third submodule.
Further, the method further comprises:
when the air conditioner is judged to be in a cooling temperature regulation mode, a second reversing instruction and a second valve switching instruction are sent, so that an A port and a D port of the four-way reversing valve are communicated, a B port and a C port of the four-way reversing valve are communicated, the solenoid valve V1, the solenoid valve V4 and the electronic expansion valve V7 are opened or regulated in opening degree according to the second valve switching instruction, and the solenoid valve V2, the solenoid valve V3, the solenoid valve V5, the solenoid valve V17, the electronic expansion valve V6 and the electronic expansion valve V8 are closed according to the second valve switching instruction; the formed refrigerating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a D port of the four-way reversing valve, the condenser, an electronic expansion valve V7, the solenoid valve V4, the medium-temperature evaporator, the solenoid valve V1 and the middle cavity which are communicated in sequence;
when the air conditioner is in the refrigeration temperature regulation mode, the air conditioner is also in a refrigeration humidity regulation mode;
when the air conditioner is judged to be in a refrigerating humidity adjusting mode, a third reversing instruction and a third valve switching instruction are sent so that the port A and the port D of the four-way reversing valve are communicated, the port B and the port C of the four-way reversing valve are communicated, an electronic expansion valve V8 and an electronic expansion valve V6 are facilitated, a solenoid valve V17 is opened or the opening degree is adjusted according to the third valve switching instruction, and a solenoid valve V2, a solenoid valve V3 and a solenoid valve V5 are closed according to the third valve switching instruction; the formed refrigerating humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V8, an electronic expansion valve V6, the low-temperature evaporator and an electromagnetic valve V17 which are sequentially communicated, and an opening B of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder.
The present invention also provides a heat pump control device, based on the method as described above, the device comprising:
the mode acquisition unit is used for acquiring the operation mode of the air conditioner;
a heating mode output unit, configured to issue a first reversing instruction and a first valve switching instruction, so that the port a of the four-way reversing valve is communicated with the port B, the port D of the four-way reversing valve is communicated with the port C, and so that the solenoid valve V2, the solenoid valve V5, the solenoid valve V17, the electronic expansion valve V6, and the electronic expansion valve V8 open or adjust the opening degree according to the first valve switching instruction, and so that the solenoid valve V1, the solenoid valve V3, the solenoid valve V4, and the electronic expansion valve V7 close according to the first valve switching instruction; the formed heating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, a solenoid valve V2 and a solenoid valve V17 which are sequentially communicated, and the medium-temperature evaporator, the low-temperature evaporator, the solenoid valve V5, the electronic expansion valve V6, the flash evaporator, the electronic expansion valve V8, the condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure stage cylinder are sequentially communicated;
when the air conditioner is in the heating mode, the air conditioner can be simultaneously or respectively in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode; the third sub-mode is opened or closed under the heating mode;
in the heating mode, the solenoid valve V17 is opened or closed to control the starting and stopping of the first sub-mode;
in the heating mode, the electromagnetic valve V2 and the electromagnetic valve V5 are opened or closed simultaneously to control the start and stop of the second sub-mode;
in the heating mode, the opening degree of the electronic expansion valve V6 is adjusted, and the solenoid valve V3 is opened or closed to control the start and stop of the third submodule.
Further, the apparatus further comprises:
a refrigeration temperature regulation mode output unit, configured to send a second reversing instruction and a second valve switching instruction when determining that the air conditioner is in a refrigeration temperature regulation mode, so that the port a of the four-way reversing valve is communicated with the port D, the port B of the four-way reversing valve is communicated with the port C, and so that the solenoid valve V1, the solenoid valve V4, and the electronic expansion valve V7 open or regulate the opening degree according to the second valve switching instruction, and so that the solenoid valve V2, the solenoid valve V3, the solenoid valve V5, the solenoid valve V17, the electronic expansion valve V6, and the electronic expansion valve V8 close according to the second valve switching instruction; the formed refrigerating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a D port of the four-way reversing valve, the condenser, an electronic expansion valve V7, the solenoid valve V4, the medium-temperature evaporator, the solenoid valve V1 and the middle cavity which are communicated in sequence;
when the air conditioner is in the refrigeration temperature regulation mode, the air conditioner is also in a refrigeration humidity regulation mode;
when the air conditioner is judged to be in a refrigerating humidity adjusting mode, a third reversing instruction and a third valve switching instruction are sent, so that the port A and the port D of the four-way reversing valve are communicated, the port B and the port C of the four-way reversing valve are communicated, an electronic expansion valve V8, an electronic expansion valve V6 and a solenoid valve V17 are opened or the opening degree of the four-way reversing valve is adjusted according to the third valve switching instruction, and a solenoid valve V2, a solenoid valve V3 and a solenoid valve V5 are closed according to the third valve switching instruction; the formed refrigerating humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V8, an electronic expansion valve V6, the low-temperature evaporator and an electromagnetic valve V17 which are sequentially communicated, and an opening B of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder.
The present invention provides a computer storage medium having one or more program instructions embodied therein for execution by a heat pump control system to perform a method as described above.
According to the air conditioner, the heat pump system, the heat pump control method and device and the storage medium, the medium-temperature evaporator and the low-temperature evaporator which are arranged in parallel are utilized, air return in a heating chamber can be realized, and meanwhile, heating in a fresh air mode is realized, so that fresh air is heated in winter, the fresh air heating function of the air conditioner is realized, and the service performance of the air conditioner is improved. Meanwhile, the second end of the medium-temperature evaporator is directly connected into an intermediate cavity (namely the intermediate cavity) of the compressor after gas-liquid separation, so that the energy-saving performance of the air conditioner is better, and the COP is higher.
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 should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic diagram of a refrigeration temperature and humidity conditioning mode of an embodiment of a heat pump system according to the present invention;
FIG. 2 is a schematic diagram of the heat pump system of FIG. 1 in a heating mode;
FIG. 3 is a schematic diagram of a refrigeration temperature and humidity conditioning mode of another embodiment of the heat pump system provided by the present invention;
fig. 4 is a schematic structural diagram of the heat pump system shown in fig. 3 in a heating mode;
FIG. 5 is a schematic diagram illustrating a refrigeration temperature and humidity conditioning mode of yet another embodiment of a heat pump system according to the present invention;
fig. 6 is a schematic structural diagram of the heat pump system shown in fig. 5 in a heating mode.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a specific implementation mode, the heat pump system provided by the invention is used for an air conditioner, has a double-stage heating function, can realize heating in a fresh air mode in winter use, and has better service performance and energy saving performance. Specifically, the heat pump system comprises a two-stage compressor, a medium-temperature evaporator, a low-temperature evaporator, a four-way reversing valve, a condenser, a flash tank, a plurality of groups of electromagnetic valves and a plurality of groups of electronic expansion valves, wherein the four-way reversing valve, the condenser and the flash tank are arranged on a pipeline. The double-stage compressor comprises a low-pressure stage cylinder, a high-pressure stage cylinder and an intermediate cavity, wherein the intermediate cavity is arranged between the low-pressure stage cylinder and the high-pressure stage cylinder; the two-stage compressor includes various configurations, which may be as shown in fig. 1 and 2, that is, the two-stage compressor 16 is an inverter compressor having a low-pressure stage cylinder and a high-pressure stage cylinder, which are both variable volume cylinders, as shown in fig. 1 and 2, the two-stage compressor 16 includes a low-pressure stage variable volume cylinder 162 and a high-pressure stage variable volume cylinder 163, and an intermediate chamber 161 is formed between the low-pressure stage variable volume cylinder 162 and the high-pressure stage variable volume cylinder 163. Or the two-stage compressor is a variable frequency compressor, as shown in fig. 3 and 4, the two-stage compressor is provided with a low-pressure stage cylinder and two high-pressure stage cylinders, wherein one high-pressure stage cylinder is a constant volume cylinder, the other high-pressure stage cylinder is a variable volume cylinder, and the low-pressure stage cylinder is a variable volume cylinder, as shown in fig. 3 and 4, the two-stage compressor includes a low-pressure stage variable volume cylinder 162, a high-pressure stage variable volume cylinder 163 and a high-pressure stage constant volume cylinder 164. Or, the two-stage compressor is a variable frequency compressor, as shown in fig. 5 and 6, the two-stage compressor is provided with two low-pressure stage cylinders and two high-pressure stage cylinders, wherein one low-pressure stage cylinder and one high-pressure stage cylinder are constant volume, and the other two cylinders are variable volume; as shown in fig. 5 and 6, the two-stage compressor includes a low-pressure stage variable volume cylinder 162, a high-pressure stage variable volume cylinder 163, a high-pressure stage constant volume cylinder 164, and a low-pressure stage constant volume cylinder 165. In theory, the variable volume cylinder and the fixed volume cylinder of the two-stage compressor may also be combined with the fixed volume compressor and the variable volume compressor, respectively, and are not limited to the above embodiments.
The system comprises a medium-temperature evaporator and a low-temperature evaporator which is connected with the medium-temperature evaporator in parallel, wherein the first end of the medium-temperature evaporator and the first end of the low-temperature evaporator are both communicated with a port B of a four-way reversing valve, and the second end of the medium-temperature evaporator and the second end of the low-temperature evaporator are both communicated with a port D of the four-way reversing valve; a first gas-liquid separator 10 is provided between the intermediate temperature evaporator 13 and the intermediate chamber, and a second gas-liquid separator 11 is provided in a branch where the low temperature evaporator is located.
When the air conditioner is in a heating mode, the heating fluid passage comprises an outlet end of the high-pressure cylinder, an opening A of the four-way reversing valve 9, an opening B of the four-way reversing valve, a solenoid valve V2, a solenoid valve V17, a medium-temperature evaporator and a low-temperature evaporator (wherein the medium-temperature evaporator and the low-temperature evaporator are both heat exchangers), a solenoid valve V5, an electronic expansion valve V6, a flash evaporator 12, an electronic expansion valve V8, a condenser, an opening D of the four-way reversing valve 9, an opening C of the four-way reversing valve 9 and an inlet end of the low-pressure cylinder which are sequentially communicated. Thus, when the air conditioner is in a heating mode, the solenoid valve V2, the solenoid valve V5, the solenoid valve V17 are opened, the electronic expansion valve V6 and the electronic expansion valve V8 are adjusted to proper opening degrees, the other valves are all closed, the refrigerant processed in the compressor flows out through the outlet end of the high-pressure stage cylinder, the port A and the port B of the four-way reversing valve 9 are communicated, the refrigerant enters through the port A of the four-way reversing valve 9, the refrigerant enters through the port B in an output state, enters the medium-temperature evaporator and the low-temperature evaporator through the solenoid valve V2 and the solenoid valve V17 which are opened in parallel, is subjected to heat exchange in the medium-temperature evaporator and the low-temperature evaporator to supply heat indoors, then the heating fluid passing through the medium-temperature evaporator is converged with the heating fluid passing through the low-temperature evaporator through the opened solenoid valve V5, enters the flash evaporator through the electronic expansion valve V6, then passes through the electronic expansion valve V8, the condenser, returning to the two-stage compressor 16 through the inlet end of the low-pressure stage cylinder.
When the air conditioner is in the heating mode, the air conditioner can be simultaneously in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode.
When the air conditioner is in a fresh air heating mode, the heating fluid passage comprises an outlet end of the high-pressure cylinder, an opening A of the four-way reversing valve 9, an opening B of the four-way reversing valve 9, an electromagnetic valve V17, the low-temperature evaporator 14, an electronic expansion valve V6, a flash tank 12, an electronic expansion valve V8, a condenser 15, an opening D of the four-way reversing valve 9, an opening C of the four-way reversing valve 9 and an inlet end of the low-pressure cylinder which are sequentially communicated.
When the air conditioner is in a return air heating mode, the heating fluid passage comprises an outlet end of the high-pressure cylinder, an opening A of the four-way reversing valve, an opening B of the four-way reversing valve, a solenoid valve V2, a medium-temperature evaporator, a solenoid valve V5, an electronic expansion valve V6, a flash tank, an electronic expansion valve V8, a condenser, an opening D of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure cylinder which are sequentially communicated.
When the air conditioner is in an air-supplying enthalpy-increasing mode, a part of heating fluid comprises the outlet end of the high-pressure-level cylinder, the port A of the four-way reversing valve 9, the port B of the four-way reversing valve 9, the low-temperature evaporator 14 or the medium-temperature evaporator, the electromagnetic valve V6, the flash tank 12, the electromagnetic valve V3 and the middle cavity 161 which are sequentially communicated through an air-supplying passage.
Besides being used for heating and fresh air heating modes in winter, the heat pump system can also be applied to a cooling temperature regulation mode and a cooling humidity regulation mode in summer. Specifically, when the air conditioner is in the cooling temperature adjustment mode, the cooling fluid passage includes the outlet end of the high-pressure stage cylinder, the port a of the four-way selector valve 9, the port D of the four-way selector valve 9, the condenser 15, the electronic expansion valve V7, the electromagnetic valve V4, the medium-temperature evaporator 13, the electromagnetic valve V1, and the intermediate chamber, which are sequentially communicated. Thus, when the air conditioner is in a cooling temperature regulation mode, the electronic expansion valve V7, the solenoid valve V4 and the solenoid valve V1 are opened, the refrigerant treated in the compressor flows out through the outlet end of the high-pressure stage cylinder, at the moment, the port a of the four-way reversing valve 9 is communicated with the port D, the refrigerant enters through the port a of the four-way reversing valve 9, after being output from the port D, the refrigerant enters the condenser 15, and then the refrigerant enters the medium-temperature evaporator 13 through the electronic expansion valve V7 and the solenoid valve V4 in a regulated state, and then returns to the intermediate cavity 161 of the two-stage compressor through the solenoid valve V1.
And when the air conditioner is in the refrigeration temperature adjusting mode, the air conditioner is also in a refrigeration humidity adjusting mode.
When the air conditioner is in a refrigeration humidity adjusting mode, the refrigeration humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve 9, an opening D of the four-way reversing valve 9, the condenser 15, an electronic expansion valve V8 in a full-open state, an electronic expansion valve V6, the low-temperature evaporator 14 and an electromagnetic valve V17 which are sequentially communicated, an opening B of the four-way reversing valve 9, an opening C of the four-way reversing valve 9 and an inlet end of the low-pressure-level cylinder. Thus, when the air conditioner is in a cooling humidity adjusting mode, the electronic expansion valve V8 is fully opened, the electronic expansion valve V6 is opened and adjusted, the solenoid valve V5, the solenoid valve V2 and the solenoid valve V3 are closed, so that the cooling fluid processed in the compressor flows out through the outlet end of the high-pressure stage cylinder, the port a of the four-way reversing valve 9 is communicated with the port D, the cooling fluid enters through the port a of the four-way reversing valve 9, the cooling fluid enters the condenser after being output from the port D, then the cooling fluid for cooling humidity adjustment enters the low-temperature evaporator 14 through the opened electronic expansion valve V8 and the electronic expansion valve V6, and then returns to the two-stage compressor through the solenoid valve V17, the port B and the port C of the four-way reversing valve 9 and the inlet end of the low-pressure stage cylinder.
Further, when the room only needs refrigeration temperature adjustment and does not need refrigeration humidity adjustment, the air conditioner closes the electromagnetic valve V1 and opens the electromagnetic valve V2 in the refrigeration temperature adjustment mode, and the refrigeration fluid passage comprises the outlet end of the high-pressure stage cylinder, the port a of the four-way reversing valve 9, the port D of the four-way reversing valve 9, the condenser 15, the electronic expansion valve V7, the electromagnetic valve V4, the medium-temperature evaporator 13, the electromagnetic valve V2, and enters the low-pressure stage air inlet of the compressor through the four-way reversing valve B and the port C of the four-way reversing valve, which are sequentially communicated.
Further, a parallel branch where the medium temperature evaporator 13 is located and a parallel branch where the low temperature evaporator 14 is located are respectively provided with a flow rate regulating valve so as to control refrigerant distribution and pressure after valve passing through the medium temperature evaporator 13 and the low temperature evaporator 14.
The heating fluid or the refrigerating fluid is a refrigerant.
In the above specific embodiment, the heat pump system provided by the invention utilizes the intermediate-temperature evaporator and the low-temperature evaporator which are arranged in parallel, so that the heating in a fresh air mode can be realized while air returns in a heating chamber, thereby heating fresh air in winter, realizing the fresh air heating function of the air conditioner, and improving the service performance of the air conditioner. Meanwhile, the second end of the medium-temperature evaporator is directly connected into an intermediate cavity (namely the intermediate cavity) of the compressor after gas-liquid separation, so that the energy-saving performance of the air conditioner is better, and the COP is higher.
In addition to the heat pump system, the present invention provides an air conditioner including the heat pump system, and other structures of the air conditioner are referred to the prior art and are not described herein again.
In order to achieve the above automatic control of the heat pump system, in one embodiment, the present invention provides a heat pump control method for controlling the operation of the heat pump system as described above, the method comprising:
s101: acquiring an operation mode of an air conditioner;
s102: when the air conditioner is judged to be in a heating mode, a first reversing instruction and a first valve switching instruction are sent, so that an opening A of the four-way reversing valve is communicated with an opening B, an opening D of the four-way reversing valve is communicated with an opening C, and a solenoid valve V2, a solenoid valve V5, a solenoid valve V17, an electronic expansion valve V6 and an electronic expansion valve V8 are opened or adjusted in opening degree according to the first valve switching instruction, and a solenoid valve V1, a solenoid valve V3, a solenoid valve V4 and an electronic expansion valve V7 are closed according to the first valve switching instruction; the formed heating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, a solenoid valve V2 and a solenoid valve V17 which are sequentially communicated, and the medium-temperature evaporator, the low-temperature evaporator, the solenoid valve V5, the electronic expansion valve V6, the flash evaporator, the electronic expansion valve V8, the condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure stage cylinder are sequentially communicated;
when the air conditioner is in the heating mode, the air conditioner can be simultaneously or respectively in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode; the third sub-mode is opened or closed under the heating mode;
in the heating mode, the solenoid valve V17 is opened or closed to control the starting and stopping of the first sub-mode;
in the heating mode, the electromagnetic valve V2 and the electromagnetic valve V5 are opened or closed simultaneously to control the start and stop of the second sub-mode;
in the heating mode, the opening degree of the electronic expansion valve V6 is adjusted, and the solenoid valve V3 is opened or closed to control the start and stop of the third submodule.
Further, the method further comprises:
when the air conditioner is judged to be in a cooling temperature regulation mode, a second reversing instruction and a second valve switching instruction are sent, so that an A port and a D port of the four-way reversing valve are communicated, a B port and a C port of the four-way reversing valve are communicated, the solenoid valve V1, the solenoid valve V4 and the electronic expansion valve V7 are opened or regulated in opening degree according to the second valve switching instruction, and the solenoid valve V2, the solenoid valve V3, the solenoid valve V5, the solenoid valve V17, the electronic expansion valve V6 and the electronic expansion valve V8 are closed according to the second valve switching instruction; the formed refrigerating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a D port of the four-way reversing valve, the condenser, an electronic expansion valve V7, the solenoid valve V4, the medium-temperature evaporator, the solenoid valve V1 and the middle cavity which are communicated in sequence;
when the air conditioner is in the refrigeration temperature regulation mode, the air conditioner is also in a refrigeration humidity regulation mode;
when the air conditioner is judged to be in a refrigerating humidity adjusting mode, a third reversing instruction and a third valve switching instruction are sent so that the port A and the port D of the four-way reversing valve are communicated, the port B and the port C of the four-way reversing valve are communicated, an electronic expansion valve V8 and an electronic expansion valve V6 are facilitated, a solenoid valve V17 is opened or the opening degree is adjusted according to the third valve switching instruction, and a solenoid valve V2, a solenoid valve V3 and a solenoid valve V5 are closed according to the third valve switching instruction; the formed refrigerating humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V8, an electronic expansion valve V6, the low-temperature evaporator and an electromagnetic valve V17 which are sequentially communicated, and an opening B of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder.
In the above specific embodiment, the heat pump control method provided by the invention utilizes the intermediate temperature evaporator and the low temperature evaporator which are arranged in parallel, and can realize heating in a fresh air mode while returning air in the heating chamber, thereby realizing heating of fresh air in winter, realizing a fresh air heating function of the air conditioner, and improving the service performance of the air conditioner. Meanwhile, the second end of the medium-temperature evaporator is directly connected into an intermediate cavity (namely the intermediate cavity) of the compressor after gas-liquid separation, so that the energy-saving performance of the air conditioner is better, and the COP is higher.
In accordance with the above control method, the present invention also provides a heat pump control apparatus, in one embodiment, the apparatus includes:
the mode acquisition unit is used for acquiring the operation mode of the air conditioner;
a heating mode output unit, configured to issue a first reversing instruction and a first valve switching instruction, so that the port a of the four-way reversing valve is communicated with the port B, the port D of the four-way reversing valve is communicated with the port C, and so that the solenoid valve V2, the solenoid valve V5, the solenoid valve V17, the electronic expansion valve V6, and the electronic expansion valve V8 open or adjust the opening degree according to the first valve switching instruction, and so that the solenoid valve V1, the solenoid valve V3, the solenoid valve V4, and the electronic expansion valve V7 close according to the first valve switching instruction; the formed heating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, a solenoid valve V2 and a solenoid valve V17 which are sequentially communicated, and the medium-temperature evaporator, the low-temperature evaporator, the solenoid valve V5, the electronic expansion valve V6, the flash evaporator, the electronic expansion valve V8, the condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure stage cylinder are sequentially communicated;
when the air conditioner is in the heating mode, the air conditioner can be simultaneously or respectively in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode; the third sub-mode is opened or closed under the heating mode;
in the heating mode, the solenoid valve V17 is opened or closed to control the starting and stopping of the first sub-mode;
in the heating mode, the electromagnetic valve V2 and the electromagnetic valve V5 are opened or closed simultaneously to control the start and stop of the second sub-mode;
in the heating mode, the opening degree of the electronic expansion valve V6 is adjusted, and the solenoid valve V3 is opened or closed to control the start and stop of the third submodule.
Further, the apparatus further comprises:
a refrigeration temperature regulation mode output unit, configured to send a second reversing instruction and a second valve switching instruction when determining that the air conditioner is in a refrigeration temperature regulation mode, so that the port a of the four-way reversing valve is communicated with the port D, the port B of the four-way reversing valve is communicated with the port C, and so that the solenoid valve V1, the solenoid valve V4, and the electronic expansion valve V7 open or regulate the opening degree according to the second valve switching instruction, and so that the solenoid valve V2, the solenoid valve V3, the solenoid valve V5, the solenoid valve V17, the electronic expansion valve V6, and the electronic expansion valve V8 close according to the second valve switching instruction; the formed refrigerating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a D port of the four-way reversing valve, the condenser, an electronic expansion valve V7, the solenoid valve V4, the medium-temperature evaporator, the solenoid valve V1 and the middle cavity which are communicated in sequence;
when the air conditioner is in the refrigeration temperature regulation mode, the air conditioner is also in a refrigeration humidity regulation mode;
when the air conditioner is judged to be in a refrigerating humidity adjusting mode, a third reversing instruction and a third valve switching instruction are sent so that the port A and the port D of the four-way reversing valve are communicated, the port B and the port C of the four-way reversing valve are communicated, an electronic expansion valve V8 and an electronic expansion valve V6 are facilitated, a solenoid valve V17 is opened or the opening degree is adjusted according to the third valve switching instruction, and a solenoid valve V2, a solenoid valve V3 and a solenoid valve V5 are closed according to the third valve switching instruction; the formed refrigerating humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V8, an electronic expansion valve V6, the low-temperature evaporator and an electromagnetic valve V17 which are sequentially communicated, and an opening B of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder.
In the above embodiment, the heat pump control device provided by the invention utilizes the intermediate temperature evaporator and the low temperature evaporator which are arranged in parallel, so that the heating in a fresh air mode can be realized while air returns in the heating chamber, the heating of fresh air in winter is realized, the fresh air heating function of the air conditioner is realized, and the use performance of the air conditioner is improved. Meanwhile, the second end of the medium-temperature evaporator is directly connected into an intermediate cavity (namely the intermediate cavity) of the compressor after gas-liquid separation, so that the energy-saving performance of the air conditioner is better, and the COP is higher.
In accordance with the above embodiments, the present invention provides a computer storage medium having one or more program instructions embodied therein for execution by a heat pump control system to perform a method as described above.
In an embodiment of the invention, the processor may be an integrated circuit chip having signal processing capability. The processor may be a general-purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component.
The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The processor reads the information in the storage medium and completes the steps of the method in combination with the hardware.
The storage medium may be a memory, for example, which may be volatile memory or nonvolatile memory, or which may include both volatile and nonvolatile memory.
The nonvolatile memory may be a Read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash memory.
The volatile memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (staticlam, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DRRAM).
The storage media described in connection with the embodiments of the invention are intended to comprise, without being limited to, these and any other suitable types of memory.
Those skilled in the art will appreciate that the functionality described in the present invention may be implemented in a combination of hardware and software in one or more of the examples described above. When software is applied, the corresponding functionality may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above embodiments are only for illustrating the embodiments of the present invention and are not to be construed as limiting the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the embodiments of the present invention shall be included in the scope of the present invention.

Claims (10)

1. A heat pump system for an air conditioner, comprising:
the double-stage compressor comprises a low-pressure stage cylinder, a high-pressure stage cylinder and an intermediate cavity, and the intermediate cavity is arranged between the low-pressure stage cylinder and the high-pressure stage cylinder;
the system comprises a medium-temperature evaporator and a low-temperature evaporator connected in parallel with the medium-temperature evaporator, wherein the first end of the medium-temperature evaporator and the first end of the low-temperature evaporator are communicated with a port B of a four-way reversing valve, and the second end of the medium-temperature evaporator and the second end of the low-temperature evaporator are communicated with a port D of the four-way reversing valve.
2. The heat pump system of claim 1,
when the air conditioner is in a heating mode, the heating fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening B of the four-way reversing valve, a solenoid valve V2 and a solenoid valve V17 which are sequentially communicated, and the heating fluid passage passes through the medium-temperature evaporator, the low-temperature evaporator, the solenoid valve V5, the electronic expansion valve V6, the flash tank, the electronic expansion valve V8, the condenser, an opening D of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder in parallel;
when the air conditioner is in the heating mode, the air conditioner can be simultaneously in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode;
when the air conditioner is in a fresh air heating mode, the heating fluid passage comprises an outlet end of the high-pressure-level cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, an electromagnetic valve V17, the low-temperature evaporator, the electronic expansion valve V6, the flash tank, the electronic expansion valve V8, the condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure-level cylinder which are sequentially communicated;
when the air conditioner is in a return air heating mode, the heating fluid passage comprises an outlet end of the high-pressure-level cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, a solenoid valve V2, a medium-temperature evaporator, a solenoid valve V5, an electronic expansion valve V6, a flash tank, an electronic expansion valve V8, a condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure-level cylinder which are sequentially communicated;
when the air conditioner is in an air-supplementing enthalpy-increasing mode, a part of heating fluid comprises the outlet end of the high-pressure-level cylinder, the port A of the four-way reversing valve, the port B of the four-way reversing valve, the low-temperature evaporator or the medium-temperature evaporator, the electromagnetic valve V6, the flash tank, the electromagnetic valve V3 and the middle cavity which are sequentially communicated through an air-supplementing passage.
3. The heat pump system of claim 1,
when the air conditioner is in a refrigerating temperature adjusting mode, a refrigerating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a D port of the four-way reversing valve, the condenser, an electronic expansion valve V7, the solenoid valve V4, the medium-temperature evaporator, the solenoid valve V1 and the middle cavity which are sequentially communicated;
when the air conditioner is in the refrigeration temperature regulation mode, the air conditioner is also in a refrigeration humidity regulation mode;
when the air conditioner is in a refrigeration humidity adjusting mode, the refrigeration humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V8 in a full-open state, an electronic expansion valve V6, a low-temperature evaporator and a solenoid valve V17 which are sequentially communicated, an opening B of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder.
4. The heat pump system according to claim 1, wherein a flow regulating valve is disposed on each of the parallel branch where the medium temperature evaporator is located and the parallel branch where the low temperature evaporator is located.
5. An air conditioner characterized by comprising the heat pump system according to any one of claims 1 to 4.
6. A heat pump control method for controlling an operation of the heat pump system according to any one of claims 1 to 4, characterized in that the method comprises:
acquiring an operation mode of an air conditioner;
when the air conditioner is judged to be in a heating mode, a first reversing instruction and a first valve switching instruction are sent, so that an opening A of the four-way reversing valve is communicated with an opening B, an opening D of the four-way reversing valve is communicated with an opening C, and a solenoid valve V2, a solenoid valve V5, a solenoid valve V17, an electronic expansion valve V6 and an electronic expansion valve V8 are opened or adjusted in opening degree according to the first valve switching instruction, and a solenoid valve V1, a solenoid valve V3, a solenoid valve V4 and an electronic expansion valve V7 are closed according to the first valve switching instruction; the formed heating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, a solenoid valve V2 and a solenoid valve V17 which are sequentially communicated, and the medium-temperature evaporator, the low-temperature evaporator, the solenoid valve V5, the electronic expansion valve V6, the flash evaporator, the electronic expansion valve V8, the condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure stage cylinder are sequentially communicated;
when the air conditioner is in the heating mode, the air conditioner can be simultaneously or respectively in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode; the third sub-mode is opened or closed under the heating mode;
in the heating mode, the solenoid valve V17 is opened or closed to control the starting and stopping of the first sub-mode;
in the heating mode, the electromagnetic valve V2 and the electromagnetic valve V5 are opened or closed simultaneously to control the start and stop of the second sub-mode;
in the heating mode, the opening degree of the electronic expansion valve V6 is adjusted, and the solenoid valve V3 is opened or closed to control the start and stop of the third submodule.
7. The heat pump control method according to claim 6, characterized in that the method further comprises: when the air conditioner is judged to be in a refrigeration temperature regulation mode, a second reversing instruction and a second valve switching instruction are sent, so that an opening A and an opening D of the four-way reversing valve are communicated, an opening B and an opening C of the four-way reversing valve are communicated, and the electromagnetic valve V1, the electromagnetic valve V4 and the electronic expansion valve V7 are opened or regulated in opening degree according to the second valve switching instruction, so that a formed refrigeration fluid passage comprises an outlet end of the high-pressure stage cylinder, the opening A of the four-way reversing valve, the opening D of the four-way reversing valve, the condenser, the electronic expansion valve V7, the electromagnetic valve V4, the medium-temperature evaporator, the electromagnetic valve V1 and the middle cavity which are sequentially communicated;
when the air conditioner is in the refrigeration temperature regulation mode, the air conditioner is also in a refrigeration humidity regulation mode;
when the air conditioner is judged to be in a refrigerating humidity adjusting mode, a third reversing instruction and a third valve switching instruction are sent so that the port A and the port D of the four-way reversing valve are communicated, the port B and the port C of the four-way reversing valve are communicated, an electronic expansion valve V8 and an electronic expansion valve V6 are facilitated, a solenoid valve V17 is opened or the opening degree is adjusted according to the third valve switching instruction, and a solenoid valve V2, a solenoid valve V3 and a solenoid valve V5 are closed according to the third valve switching instruction; the formed refrigerating humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V8, an electronic expansion valve V6, the low-temperature evaporator and an electromagnetic valve V17 which are sequentially communicated, and an opening B of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder.
8. A heat pump control apparatus based on the heat pump control method according to claim 6 or 7, characterized in that the apparatus comprises:
the mode acquisition unit is used for acquiring the operation mode of the air conditioner;
a heating mode output unit, configured to issue a first reversing instruction and a first valve switching instruction, so that the port a of the four-way reversing valve is communicated with the port B, the port D of the four-way reversing valve is communicated with the port C, and so that the solenoid valve V2, the solenoid valve V5, the solenoid valve V17, the electronic expansion valve V6, and the electronic expansion valve V8 open or adjust the opening degree according to the first valve switching instruction, and so that the solenoid valve V1, the solenoid valve V3, the solenoid valve V4, and the electronic expansion valve V7 close according to the first valve switching instruction; the formed heating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a B port of the four-way reversing valve, a solenoid valve V2 and a solenoid valve V17 which are sequentially communicated, and the medium-temperature evaporator, the low-temperature evaporator, the solenoid valve V5, the electronic expansion valve V6, the flash evaporator, the electronic expansion valve V8, the condenser, a D port of the four-way reversing valve, a C port of the four-way reversing valve and an inlet end of the low-pressure stage cylinder are sequentially communicated;
when the air conditioner is in the heating mode, the air conditioner can be simultaneously or respectively in a first sub-mode, a second sub-mode and a third sub-mode, wherein the first sub-mode is a fresh air heating mode, the second sub-mode is a return air heating mode, and the third sub-mode is an air supplementing and enthalpy increasing mode; the third sub-mode is opened or closed under the heating mode;
in the heating mode, the solenoid valve V17 is opened or closed to control the starting and stopping of the first sub-mode;
in the heating mode, the electromagnetic valve V2 and the electromagnetic valve V5 are opened or closed simultaneously to control the start and stop of the second sub-mode;
in the heating mode, the opening degree of the electronic expansion valve V6 is adjusted, and the solenoid valve V3 is opened or closed to control the start and stop of the third submodule.
9. The heat pump control apparatus according to claim 7, characterized in that the apparatus further comprises:
a refrigeration temperature regulation mode output unit, configured to send a second reversing instruction and a second valve switching instruction when determining that the air conditioner is in a refrigeration temperature regulation mode, so that the port a of the four-way reversing valve is communicated with the port D, the port B of the four-way reversing valve is communicated with the port C, and so that the solenoid valve V1, the solenoid valve V4, and the electronic expansion valve V7 open or regulate the opening degree according to the second valve switching instruction, and so that the solenoid valve V2, the solenoid valve V3, the solenoid valve V5, the solenoid valve V17, the electronic expansion valve V6, and the electronic expansion valve V8 close according to the second valve switching instruction; the formed refrigerating fluid passage comprises an outlet end of the high-pressure stage cylinder, an A port of the four-way reversing valve, a D port of the four-way reversing valve, the condenser, an electronic expansion valve V7, the solenoid valve V4, the medium-temperature evaporator, the solenoid valve V1 and the middle cavity which are communicated in sequence;
when the air conditioner is in the refrigeration temperature regulation mode, the air conditioner is also in a refrigeration humidity regulation mode;
when the air conditioner is judged to be in a refrigerating humidity adjusting mode, a third reversing instruction and a third valve switching instruction are sent so that the port A and the port D of the four-way reversing valve are communicated, the port B and the port C of the four-way reversing valve are communicated, an electronic expansion valve V8 and an electronic expansion valve V6 are facilitated, a solenoid valve V17 is opened or the opening degree is adjusted according to the third valve switching instruction, and a solenoid valve V2, a solenoid valve V3, a solenoid valve V5 are facilitated to be closed according to the third valve switching instruction; the formed refrigerating humidity adjusting fluid passage comprises an outlet end of the high-pressure-level cylinder, an opening A of the four-way reversing valve, an opening D of the four-way reversing valve, the condenser, an electronic expansion valve V8, an electronic expansion valve V6, the low-temperature evaporator and an electromagnetic valve V17 which are sequentially communicated, and an opening B of the four-way reversing valve, an opening C of the four-way reversing valve and an inlet end of the low-pressure-level cylinder.
10. A computer storage medium containing one or more program instructions for execution by a heat pump control system to perform the method of claim 6 or 7.
CN201910951293.4A 2019-10-08 2019-10-08 Air conditioner, heat pump system, heat pump control method, device and storage medium Pending CN110594920A (en)

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CN201910951293.4A Pending CN110594920A (en) 2019-10-08 2019-10-08 Air conditioner, heat pump system, heat pump control method, device and storage medium

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JPH1076837A (en) * 1996-09-06 1998-03-24 Calsonic Corp Heating system for automobile
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CN1667331A (en) * 2005-04-07 2005-09-14 上海交通大学 Refrigerating unit of double-temperature refrigerator car
CN101216225A (en) * 2008-01-11 2008-07-09 清华大学 Double temperature cold water/cold air unit
CN103759468A (en) * 2014-01-08 2014-04-30 浙江理工大学 Heat pump system with dual-temperature heat sources
CN109827353A (en) * 2018-12-25 2019-05-31 珠海格力电器股份有限公司 A kind of air-conditioning system
CN208952452U (en) * 2018-07-25 2019-06-07 中国科学院广州能源研究所 A kind of quasi- second level ultralow-temperature air energy heat pump of double-condenser
CN211424586U (en) * 2019-10-08 2020-09-04 南京晶华智能科技有限公司 Air conditioner and heat pump system thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1076837A (en) * 1996-09-06 1998-03-24 Calsonic Corp Heating system for automobile
JP2003294274A (en) * 2002-04-05 2003-10-15 Kajima Corp Constant temperature and humidity air-conditioning system
CN1667331A (en) * 2005-04-07 2005-09-14 上海交通大学 Refrigerating unit of double-temperature refrigerator car
CN101216225A (en) * 2008-01-11 2008-07-09 清华大学 Double temperature cold water/cold air unit
CN103759468A (en) * 2014-01-08 2014-04-30 浙江理工大学 Heat pump system with dual-temperature heat sources
CN208952452U (en) * 2018-07-25 2019-06-07 中国科学院广州能源研究所 A kind of quasi- second level ultralow-temperature air energy heat pump of double-condenser
CN109827353A (en) * 2018-12-25 2019-05-31 珠海格力电器股份有限公司 A kind of air-conditioning system
CN211424586U (en) * 2019-10-08 2020-09-04 南京晶华智能科技有限公司 Air conditioner and heat pump system thereof

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