CN115507474B - Air conditioner and control method thereof - Google Patents

Air conditioner and control method thereof Download PDF

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Publication number
CN115507474B
CN115507474B CN202211185534.7A CN202211185534A CN115507474B CN 115507474 B CN115507474 B CN 115507474B CN 202211185534 A CN202211185534 A CN 202211185534A CN 115507474 B CN115507474 B CN 115507474B
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Prior art keywords
port
unit
heat storage
compressor
heat
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CN202211185534.7A
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CN115507474A (en
Inventor
王宝龙
石乔波
栾承志
罗紫怡
岳桓羽
牛恒
石文星
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Tsinghua University
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Tsinghua University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

The invention relates to the technical field of air conditioners, and provides an air conditioner and a control method of the air conditioner, wherein the air conditioner comprises the following components: the external machine unit is provided with a first port, a second port and a compressor; the two ends of the inner machine unit are respectively communicated with the first port and the second port of the outer machine unit; and the three ports of the heat storage unit are respectively connected with the first port, the second port and the compressor. According to the air conditioner provided by the embodiment of the invention, the heat storage units are arranged in the outer unit and the inner unit, so that part of heat energy supplied by the outer unit can be stored by the heat storage units in the process that the outer unit supplies heat for the inner unit. Because the user has the characteristics of intermittently using the air conditioner, when the air conditioner is closed for a period of time and then is opened again, the temperature of the inner unit can be quickly increased through the heat release of the heat storage unit, and then the room can be quickly increased, so that the comfort of people can be improved.

Description

Air conditioner and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method of the air conditioner.
Background
With the improvement of living standard of residents, air conditioners are becoming more and more commonly used. Because the air conditioner has the advantages of dual purposes of cooling and heating, energy saving and the like, the air conditioner can supply cold or heat for the areas with summer heat and winter cold.
According to the energy-saving habit of residents, the air conditioner is generally characterized by intermittent use. When outdoor is cold, when starting the air conditioner and heating, because the initial temperature of the outer machine of the air conditioner is lower, the circulation working condition of the air conditioner can be influenced, the heating speed of the air conditioner is low when the air conditioner is started, the temperature of a room is slowly increased, and the comfort requirement of people is difficult to meet.
Disclosure of Invention
The invention provides an air conditioner and a control method of the air conditioner, which are used for solving the defects that in the prior art, when the air conditioner is started to heat outdoors and is cold, the heating speed of the air conditioner is low when the air conditioner is started, the temperature of a room is slowly increased, and the comfort requirement of people is difficult to meet.
The invention provides an air conditioner, comprising:
the external machine unit is provided with a first port, a second port and a compressor;
The two ends of the inner machine unit are respectively communicated with the first port and the second port of the outer machine unit;
the three ports of the heat storage unit are respectively connected with the first port, the second port and the compressor;
In a first working state, the first port is communicated with the second port through the heat storage unit, the refrigerant flows into the heat storage unit and the inner unit through the first port from the outer unit, and the refrigerant flows into the outer unit through the second port from the heat storage unit and the inner unit;
in a second working state, the second port is communicated with the compressor through the heat storage unit, the refrigerant flows into the inner unit from the outer unit through the first port, and the refrigerant flows into the outer unit and the heat storage unit from the inner unit through the second port.
According to the air conditioner provided by the invention, the air supplementing port is arranged on the compressor and is used for supplementing air for the compressor.
According to the present invention, there is provided an air conditioner, the outdoor unit comprising:
An outdoor heat exchanger is arranged on the outside of the heat exchanger,
Four ports of the four-way valve are respectively connected with the outdoor heat exchanger, the first port, the inlet of the compressor and the outlet of the compressor, and the four-way valve is used for enabling the outdoor heat exchanger to be communicated between the inlet of the compressor and the outlet of the compressor in a switching mode;
And in the first working state or the second working state, the outdoor heat exchanger is communicated with the inlet of the compressor through the four-way valve, and the outlet of the compressor is communicated with the first port through the four-way valve.
According to the present invention, there is provided an air conditioner, the indoor unit comprising:
An internal machine;
A first throttle valve disposed between the inner machine and the second port;
And in a third working state, the first throttle valve is closed, the first port is communicated with the inlet of the compressor through the four-way valve, and the outlet of the compressor is communicated with the outdoor heat exchanger through the four-way valve.
According to one type of air conditioner provided by the present invention,
The external unit further includes:
And the gas-liquid separator is arranged between the four-way valve and the inlet of the compressor and is used for filtering out the refrigerant in a liquid state.
According to the present invention, there is provided an air conditioner, further comprising:
An economizer having a temperature raising passage and a temperature lowering passage which are not communicated with each other and are capable of exchanging heat with each other,
The heating passage is communicated between a first branch of the internal unit and the second port;
the cooling passage is communicated between the second branch of the internal unit and the heat storage unit.
The invention also provides a control method of the air conditioner, which comprises the following steps:
in a state where the heat storage unit has completed heat storage:
when a rapid heating signal is received, controlling the inner unit to respectively convey the refrigerant to the heat storage unit and the outer unit through the second port;
controlling the heat storage unit to deliver the refrigerant to the compressor;
And controlling the outer machine unit to convey the refrigerant to the inner machine unit through the first port.
According to the control method of the air conditioner provided by the invention, the heat storage process of the heat storage unit comprises the following steps:
Controlling the outer machine unit to respectively convey the refrigerant to the inner machine unit and the heat storage unit through the first port so as to enable the heat storage unit to store heat;
And controlling the heat storage unit and the inner unit to convey the refrigerant to the outer unit through the second port.
The invention also provides a control method of the air conditioner, which comprises the following steps:
in a state where the heat storage unit has completed heat storage:
When a defrosting signal is received, controlling a second port of the external unit to convey the refrigerant to the heat storage unit;
and controlling the heat storage unit to convey the refrigerant to the first port of the external machine unit.
According to the technical scheme provided by the invention, the heat storage units are arranged in the outer unit and the inner unit, so that part of heat energy supplied by the outer unit can be stored by the heat storage units in the process that the outer unit supplies heat for the inner unit. Because the user has the characteristics of intermittently using the air conditioner, when the air conditioner is closed for a period of time and then is opened again, the temperature of the inner unit can be quickly increased through the heat release of the heat storage unit, and then the room can be quickly increased, so that the comfort of people can be improved.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an air conditioner according to the present invention;
FIG. 2 is a second schematic diagram of an air conditioner according to the present invention;
FIG. 3 is a third schematic diagram of an air conditioner according to the present invention;
FIG. 4 is a schematic diagram of an air conditioner according to the present invention;
FIG. 5 is a schematic diagram of an air conditioner according to the present invention;
FIG. 6 is a schematic diagram of an air conditioner according to the present invention;
fig. 7 is a flowchart of a control method of an air conditioner according to the present invention;
fig. 8 is a flowchart of another control method of an air conditioner provided by the present invention;
reference numerals:
100: an external unit;
110: a first port;
120: a second port;
130: a compressor;
140: an outdoor heat exchanger;
150: a four-way valve;
160: a gas-liquid separator;
170: a third throttle valve;
200: an internal unit;
210: an internal machine;
220: a first throttle valve;
300: a heat storage unit;
310: a three-way valve;
320: a heat accumulator;
330: a second throttle valve;
400: an economizer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The examples provided by the present invention will now be described with reference to fig. 1 to 8, it being understood that the following are merely illustrative embodiments of the present invention and are not to be construed as limiting the present invention in any way.
Fig. 1 is a schematic structural diagram of an air conditioner according to the present invention, please refer to fig. 1. The air conditioner provided by the invention can be applied to one-to-one machine set of a room air conditioner and can also be applied to one-to-many machine sets of a multi-split air conditioner. The air conditioner includes: the external unit 100, the internal unit 200, and the heat storage unit 300, the external unit 100 and the heat storage unit 300 are typically installed outdoors, and the internal unit 200 is typically installed indoors. The outer unit 100 has a first port 110, a second port 120 and a compressor 130, two ends of the inner unit 200 are respectively connected to the first port 110 and the second port 120 of the outer unit 100, and the compressor 130 drives the refrigerant to circulate between the inner unit 200 and the outer unit 100, so as to supply heat to the inner unit 200.
The three ports of the thermal storage unit 300 are connected to the first port 110, the second port 120, and the compressor 130, respectively. The heat storage unit 300 stores part of the thermal energy supplied from the external unit 100 during the process of supplying heat to the internal unit 200 from the external unit 100. Because the user has the characteristic of intermittently using the air conditioner, when the air conditioner is turned on again after the air conditioner is turned off for a while, the temperature of the indoor unit 200 is rapidly raised by the heat release of the heat storage unit 300.
In the first working state, the first port 110 is communicated with the second port 120 through the heat storage unit 300, the high-temperature refrigerant flows into the inner unit 200 and the heat storage unit 300 from the outer unit 100 through the first port 110, and after the heat of the inner unit 200 and the heat storage unit 300 is released, the refrigerant flows back to the outer unit 100 through the second port 120. In this operating state, the indoor unit 200 releases heat indoors, the heat storage unit 300 stores heat, and the air conditioner is in a heated and heat storage state.
Fig. 2 is a schematic diagram of a second embodiment of an air conditioner according to the present invention, please refer to fig. 2. In the second operating state, the second port 120 communicates with the medium pressure suction port of the compressor 130 through the heat storage unit 300. Part of the refrigerant absorbs heat in the heat storage unit 300 and then enters the medium-pressure suction port of the compressor 130. Meanwhile, another part of the refrigerant absorbs heat in the outdoor unit 100 and then enters the low pressure suction port of the compressor 130, and the refrigerant after absorbing heat flows to the indoor unit 200 through the first port 110 by the driving of the compressor 130, so that the indoor unit 200 rapidly heats up and releases heat. Part of the refrigerant after heat release flows back to the external unit 100 through the second port 120, and the remaining part flows back to the heat storage unit 300. After the air conditioner is turned on, in this operating state, the heat storage unit 300 releases heat, and the heat energy released from the heat storage unit 300 and the heat absorbed in the outdoor unit are transferred to the indoor unit 200 through the flow of the refrigerant, and the indoor unit 200 rapidly heats up and releases heat, so that the air conditioner can reach a rapid heating state.
According to the air conditioner provided by the embodiment of the invention, the heat storage unit 300 is arranged between the outer unit 100 and the inner unit 200, and in the process that the outer unit 100 supplies heat to the inner unit 200, the heat storage unit 300 can store part of heat energy supplied by the outer unit 100. Because the user has the characteristic of intermittently using the air conditioner, when the air conditioner is turned on again after the air conditioner is turned off for a while, the temperature of the indoor unit 200 is rapidly raised by the heat release of the heat storage unit 300, and thus the room can be rapidly raised, and the comfort of people can be improved.
In the above embodiment, the thermal storage unit 300 includes: three ports of the three-way valve 310 are connected to the first port 110, the third port of the heat accumulator 320, and the compressor 130, respectively, and the fourth port of the heat accumulator 320 communicates with the second port 120.
Wherein, through the switching of the three-way valve 310, the intercommunication between the three ports can be completed. The heat accumulator 320 in this embodiment is a vapor container using a refrigerant as a heat storage medium, and has the characteristics of high efficiency, energy saving and emission reduction. By the cooperation of the three-way valve 310 and the heat accumulator 320, switching of the heat accumulator 320 between heat accumulation and heat release can be achieved.
Specifically, the structure of the heat accumulator 320 may be in a non-limiting form, and the phase transition temperature of the heat accumulating material of the present invention may be 10 to 30 ℃.
In an embodiment of the present invention, the compressor 130 is provided with a gas-compensating port, and the gas-compensating port is used for compensating gas for the compressor 130, and the gas-compensating port can increase the circulation amount of the refrigerant for the compressor 130, thereby significantly improving the low-temperature heating effect of the air conditioner. The smaller heat accumulator 320 can be used in the air conditioner provided with the air supply port, that is, the heat accumulating capability of the heat accumulating unit 300 can be ensured, so that the volume of the whole air conditioner can be reduced. Specifically, the compressor 130 may be a scroll compressor, for example, and the embodiment is not limited thereto.
In one embodiment of the present invention, the external unit 100 includes: an outdoor heat exchanger 140 and a four-way valve 150. Specifically, the four ports of the four-way valve 150 are respectively connected to the outdoor heat exchanger 140, the first port 110, the inlet of the compressor 130, and the outlet of the compressor 130, and the four-way valve 150 is configured to switch the communication between the inlet of the compressor 130 and the outlet of the compressor 130 by switching the communication between the ports of the four-way valve 140. Specifically, the four-way valve 150 may be switched manually, or may be switched automatically based on an automatic control technology, which is not limited in this embodiment.
Specifically, in the first operating state, in the outdoor unit 100, the outdoor heat exchanger 140 is connected to the inlet of the compressor 130 through the four-way valve 150, and the outlet of the compressor 130 is connected to the first port 110 through the four-way valve 150. The refrigerant flows to the compressor 130 along the outdoor heat exchanger 140, and the refrigerant warmed in the compressor 130 flows from the compressor 130 to the first port 110. The first port 110 is communicated with the second port 120 through the heat storage unit 300, the first port 110 is used for conveying high-temperature refrigerant into the internal unit 200 and the heat storage unit 300, and the refrigerant flows back to the external unit 100 through the second port 120 after heat is released from the internal unit 200 and the heat storage unit 300. In this operating state, the indoor unit 200 releases heat indoors while the heat storage unit 300 stores heat, and the air conditioner is in a heated and heat storage state. That is, by adjusting the air conditioner to the first operation state, the heat storage unit 300 may automatically store heat during the heating process of the air conditioner so as to release heat later.
In the second operating state, in the outdoor unit 100, the outdoor heat exchanger 140 communicates with the inlet of the compressor 130 through the four-way valve 150, and the outlet of the compressor 130 communicates with the first port 110 through the four-way valve 150. The refrigerant flows along the outdoor heat exchanger 140 to the compressor 130. And, the second port 120 communicates with the inlet end of the compressor 130 through the heat storage unit 300. The refrigerant is heated in the heat storage unit 300 and then enters the compressor 130, and the refrigerant from the outdoor heat exchanger 140 and the heat storage unit 300 is further heated by the driving of the compressor 130, and the heated refrigerant flows to the internal unit 200 through the first port 110, so that the internal unit 200 rapidly heats up and releases heat. The refrigerant having released heat flows back to the external unit 100 through the second port 120. After the air conditioner is turned on, in this operating state, the heat storage unit 300 releases heat, and the heat energy released from the heat storage unit 300 and the heat energy transferred by the compressor 130 are transferred to the indoor unit 200 through the flow of the refrigerant, and the indoor unit 200 rapidly heats up and releases heat, so that the air conditioner can reach a rapid heating state. The working mode is suitable for the condition that the air conditioner is turned on again after the air conditioner is turned off in the intermittent use process, and the air conditioner is adjusted to a second working state, so that the air conditioner can be heated rapidly, the rapid rise of the indoor temperature is realized, and the comfort requirement is met.
In one embodiment of the present invention, the internal unit 200 includes: an inner machine 210 and a first throttle valve 220, the first throttle valve 220 being disposed between the inner machine 210 and the second port 120 for controlling whether or not refrigerant flows through the inner machine 210.
By switching the three-way valve 310, the four-way valve 150 and the first throttle valve 220, the air conditioner can be put into different operation states. For example, fig. 3 is a schematic diagram of a third embodiment of an air conditioner according to the present invention, please refer to fig. 3. In the third operating state, the first throttle valve 220 may be closed and the three-way valve 310 may be switched to allow the second port 120 to communicate with the first port 110 through the regenerator 320 and the three-way valve 310. In the outdoor unit 100, the first port 110 communicates with an inlet of the compressor 130 through the four-way valve 150, and an outlet of the compressor 130 communicates with the outdoor heat exchanger 140 through the four-way valve 150. The refrigerant flows to the outdoor heat exchanger 140 after being warmed up in the compressor 130, and can defrost the outdoor heat exchanger 140 quickly without taking heat from the room.
In one embodiment provided by the present invention, the external unit 100 further includes: the gas-liquid separator 160 is disposed between the four-way valve 150 and the inlet of the compressor 130, and is used for filtering out the refrigerant in a liquid state, protecting the compressor 130, and improving the service effect and service life of the compressor 130.
In the first operating state, the second operating state, or other operating states, the heat storage rate or the heat release rate of the heat storage 320 may also be adjusted by adjusting the opening of the first throttle valve 220 to adjust the flow rate in the heat storage 320.
In a further embodiment, the thermal storage unit 300 further includes: a second throttle valve 330, the second throttle valve 330 being disposed between the regenerator 320 and the second port 120.
In the first operating state, the second operating state, and the third operating state, the flow rate in the heat accumulator 320 may be adjusted by adjusting the opening degree of the above-described second throttle valve 330, thereby adjusting the heat accumulation amount of the heat accumulator 320. In other operating states, the heat accumulator 320 may be disabled by closing the second throttle valve 330 to place the air conditioner in a normal heating mode (see fig. 4) or a normal cooling mode (see fig. 5).
In a further embodiment, the external unit 100 further includes: a third throttle valve 170, the third throttle valve 170 being disposed between the outdoor heat exchanger 140 and the second port 120. The third throttle valve 170 is used to cooperate with the first throttle valve 220 and the second throttle valve 330 to achieve synchronous regulation of the refrigerant flow in each branch of the air conditioner.
Fig. 6 is a schematic diagram of an air conditioner according to the present invention, please refer to fig. 6. In one embodiment provided by the present invention, the air conditioner further includes: an economizer 400. The economizer 400 is one type of heat exchanger, and one portion of the refrigerant itself is throttled, vaporized and absorbs heat, while the other portion is subcooled. In this embodiment, the economizer 400 has a temperature increasing passage and a temperature decreasing passage which are not communicated with each other and can exchange heat with each other. Wherein the cooling passage is communicated between the first branch of the internal unit 200 and the second port 120; the temperature raising passage communicates between the second branch of the internal unit 200 and the heat storage unit 300.
In the second operating state, i.e., the rapid heating state, the refrigerant transferred through the indoor unit 200 is divided into a first branch and a second branch. Wherein, the first branch is communicated with the second port 120 through the cooling passage to realize cooling. The second branch is communicated with the heat storage unit 300 through a heating passage to realize heating.
By providing the economizer 400 described above, the enthalpy of the refrigerant reaching the outdoor unit 100 can be made lower, that is, the temperature can be lower, and more outdoor heat can be absorbed, and more heat energy can be supplied to the indoor unit 200 in a shorter time.
According to the air conditioner provided by the embodiment of the invention, the heat storage unit 300 is arranged between the outer unit 100 and the inner unit 200, and in the process that the outer unit 100 supplies heat to the inner unit 200, the heat storage unit 300 can store part of heat energy supplied by the outer unit 100. Because the user has the characteristic of intermittently using the air conditioner, when the air conditioner is turned on again after the air conditioner is turned off for a while, the temperature of the indoor unit 200 is rapidly raised by the heat release of the heat storage unit 300, and thus the room can be rapidly raised, and the comfort of people can be improved.
Further, the thermal storage unit 300 includes: three ports of the three-way valve 310 are connected to the first port 110, the third port of the heat accumulator 320, and the compressor 130, respectively, and the fourth port of the heat accumulator 320 communicates with the second port 120. By switching the three-way valve 310, the intercommunication between the three ports can be completed. By the cooperation of the three-way valve 310 and the heat accumulator 320, switching of the heat accumulator 320 between heat accumulation and heat release can be achieved.
Fig. 7 is a flowchart of a control method of an air conditioner according to the present invention, please refer to fig. 7. The control method of the air conditioner comprises the following steps:
701. the heat storage unit 300 completes the heat storage.
In this step, the heat storage unit 300 may store heat during heating of the air conditioner, or may store heat during separate heat storage, which is not limited in this embodiment.
In one embodiment of the present invention, the heat storage process of the heat storage unit 300 is heat storage during heating. Specifically, the first port 110 of the external unit 100 may be controlled to respectively convey the refrigerant to the internal unit 200 and the heat storage unit 300 to store heat in the heat storage unit 300. The inner unit 200 is controlled to convey the refrigerant to the outer unit 100, thereby realizing the circulation flow of the refrigerant. Thereby heat is stored in the heating process of the air conditioner so as to release heat later.
Specifically, referring to fig. 1, the d and e ends of the four-way valve 150 are connected, the c and s ends are connected, the first throttle valve 220 is fully opened, the third throttle valve 170 is opened, and the three-way valve 310 is communicated with the A, C ports. At this time, the high temperature and high pressure gaseous refrigerant is discharged from the discharge port of the compressor 130, and the main fluid enters the inner unit 210, i.e., the indoor heat exchanger, through the d and e ends of the four-way valve 150, is condensed and heat-released to be liquefied into high temperature and high pressure liquid refrigerant, and then passes through the first throttle valve 220 which is fully opened. Part of the fluid enters the heat accumulator 320 to release heat through the d and e ends of the four-way valve 150, is combined with the main fluid after passing through the second throttle valve 330, is depressurized into low-pressure two-phase refrigerant through the third throttle valve 170, absorbs heat and gasifies into low-pressure gaseous refrigerant in the outdoor heat exchanger 140, enters the gas-liquid separator 160 through the c and s sections of the four-way valve 150, and returns to the inlet of the compressor 130.
In the step, a smaller heat storage device is used for storing heat, so that the problem of rapid heating and defrosting can be solved.
702. Upon receiving the rapid heating signal, the inner unit 200 is controlled to deliver the refrigerant to the heat storage unit 300 and the outer unit 100, respectively.
Because the user has the characteristic of intermittently using the air conditioner, when the air conditioner is turned on again after the air conditioner is turned off for a while, the air conditioner receives the rapid heating signal, and the refrigerant is rapidly warmed up by the heat release of the heat storage unit 300.
703. The heat storage unit 300 is controlled to deliver refrigerant to the compressor 130.
In the compressor 130, the refrigerant is further warmed.
704. The first port 110 of the outer unit 100 is controlled to deliver refrigerant to the inner unit 200.
After the heat storage unit 300 and the compressor 130 emit heat together, the refrigerant carries a large amount of heat to the indoor unit 200, and the indoor unit 200 is rapidly warmed up.
Referring to fig. 2, the steps 702 to 704 specifically include: the d and e ends of the four-way valve 150 are connected, the c and s ends are connected, the first throttle valve 220 is fully opened, the second throttle valve 330 and the third throttle valve 170 are opened, and the three-way valve 310 is communicated with the A, B ports. At this time, the high-temperature and high-pressure gaseous refrigerant is discharged from the discharge port of the compressor 130, enters the inner machine 210 through the d and e ends of the four-way valve 150, condenses and releases heat to be liquefied into a high-temperature and high-pressure liquid refrigerant, and after passing through the fully opened first throttle valve 220, the fluid is divided into two parts, the main fluid passes through the third throttle valve 170 and then passes through the outdoor heat exchanger 140, absorbs heat to be vaporized into a low-pressure liquid refrigerant, and passes through the c and s sections of the four-way valve 150, enters the gas-liquid separator 160, and returns to the inlet of the compressor 130. The other fluid passes through the second throttle valve 330 and then enters the heat accumulator 320, absorbs heat and is vaporized into gaseous refrigerant, and then enters the medium-pressure air suction port of the compressor 130.
The heat in the heat accumulator 320 is extracted at the start-up stage, and meanwhile, the heat is extracted from the outdoor air, so that the efficient heating operation in the start-up state is realized.
Fig. 8 is a flowchart of another control method of an air conditioner provided by the present invention, please refer to fig. 8, the control method includes:
801. The heat storage unit 300 completes the heat storage.
In this step, the heat storage unit 300 may store heat during heating of the air conditioner, or may store heat during separate heat storage, which is not limited in this embodiment.
In one embodiment of the present invention, the heat storage process of the heat storage unit 300 is heat storage during heating. Specifically, the first port 110 of the external unit 100 may be controlled to respectively convey the refrigerant to the internal unit 200 and the heat storage unit 300 to store heat in the heat storage unit 300. The inner unit 200 is controlled to convey the refrigerant to the outer unit 100, thereby realizing the circulation flow of the refrigerant. Thereby heat is stored in the heating process of the air conditioner so as to release heat later.
In the step, a smaller heat storage device is used for storing heat, so that the problem of rapid heating and defrosting can be solved.
802. Upon receiving the defrost signal, the second port 120 of the external unit 100 is controlled to deliver the refrigerant to the heat storage unit 300.
Because the user has a characteristic of intermittently using the air conditioner, the outdoor heat exchanger 140 may be covered with frost after the air conditioner is turned off for a while. When the air conditioner is turned on again, the air conditioner receives the defrost signal, and the refrigerant is rapidly warmed up by the heat release of the heat storage unit 300.
In this step, the indoor unit 200 does not participate in the circulation of the refrigerant, so as to avoid heat extraction from the room.
803. The heat storage unit 300 is controlled to deliver the refrigerant to the first port 110 of the external unit 100.
The refrigerant flows to the outdoor heat exchanger 140 after being warmed up in the compressor 130, and can defrost the outdoor heat exchanger 140 quickly without taking heat from the room.
Referring to fig. 3, the steps 802 to 803 specifically include: the ends c and d of the four-way valve 150 are connected, the ends e and s are connected, the second throttle valve 330 and the third throttle valve 170 are opened, the first throttle valve 220 is closed, and the three-way valve 310 is communicated with the A, C ports. At this time, the high-temperature and high-pressure gaseous refrigerant is discharged from the exhaust port of the compressor 130, enters the outdoor heat exchanger 140 through the c and d ends of the four-way valve 150, condenses and releases heat to be liquefied into high-temperature and high-pressure liquid refrigerant, then reduces pressure to be liquefied into low-pressure liquid refrigerant through the second throttle valve 330 and the third throttle valve 170, absorbs heat to be vaporized into low-pressure gaseous refrigerant through the heat accumulator 320, enters the gas-liquid separator 160 through the e and s sections of the four-way valve 150, and then returns to the inlet of the compressor 130.
Indoor heat is not required to be extracted in the defrosting operation mode, the indoor temperature does not obviously fluctuate, and the comfort of the defrosting state is improved.
The invention also provides a control method of the air conditioner, which corresponds to a common heating mode: the control method comprises the following steps:
Referring to fig. 4, the d and e ends of the four-way valve 150 are connected, the c and s ends are connected, the first throttle valve 220 is fully opened, the third throttle valve 170 is opened, the second throttle valve 330 is closed, and the three-way valve 310 is connected to the A, C ports. At this time, the high temperature and high pressure gaseous refrigerant is discharged from the discharge port of the compressor 130, enters the inner unit 210, i.e., the indoor heat exchanger, through the d and e ends of the four-way valve 150, is liquefied into high temperature and high pressure liquid refrigerant by condensation heat release, passes through the fully opened first throttle valve 220, is reduced in pressure into low pressure liquid refrigerant by the third throttle valve 170, is vaporized into low pressure liquid refrigerant by heat absorption through the outdoor heat exchanger 140, enters the gas-liquid separator 160 through the c and s sections of the four-way valve 150, and returns to the inlet of the compressor 130.
The invention also provides a control method of the air conditioner, which corresponds to the common refrigeration mode: the control method comprises the following steps:
Referring to fig. 5, the ends c and d of the four-way valve 150 are connected, the ends s and e are connected, the first throttle valve 220 is fully opened, the third throttle valve 170 is opened, the second throttle valve 330 is closed, and the three-way valve 310 is connected to the A, C ports. At this time, the high temperature and high pressure gaseous refrigerant is discharged from the discharge port of the compressor 130, enters the outdoor heat exchanger 140 through the c and d ends of the four-way valve 150, is condensed and released to be liquefied into high temperature and high pressure liquid refrigerant, is depressurized into low pressure liquid refrigerant through the third throttle valve 170, enters the inner machine 210 through the fully opened first throttle valve 220, absorbs heat and is vaporized into low pressure liquid refrigerant, enters the gas-liquid separator 160 through the four-way valve 150s and e sections, and is returned to the inlet of the compressor 130.
The air conditioner has simple structure, and can realize the functions of common heating, heat storage, rapid heating, efficient defrosting and common refrigeration through the switching of valves such as a throttle valve and the like.
Referring to fig. 6, in an embodiment provided by the present invention, the air conditioner further includes: an economizer 400. The economizer 400 is one type of heat exchanger, and one portion of the refrigerant itself is throttled, vaporized and absorbs heat, while the other portion is subcooled. The control method of the air conditioner provided based on the above-described embodiments is consistent with the above-described circulation principle, and the economizer 400 may be added to the circulation system using the heat storage 320 device as a medium-temperature heat source to improve the system efficiency. The scheme is composed of a compressor 130, a four-way valve 150, a heat accumulator 320, an indoor unit 210, a third throttle valve 170, a second throttle valve 330, an economizer 400, a throttle valve, an outdoor heat exchanger 140, a three-way valve 310 and a gas-liquid separator 160; or it is contemplated that the heat accumulator 320 is wound around the compressor 130 housing using the compressor 130 housing waste heat.
In the second operating state, i.e., the rapid heating state, the refrigerant transferred through the indoor unit 200 is divided into a first branch and a second branch. Wherein, the first branch is communicated with the second port 120 through the cooling passage to realize cooling. The second branch is communicated with the heat storage unit 300 through a heating passage to realize heating. By providing the economizer 400 described above, the enthalpy of the refrigerant reaching the outdoor unit 100 can be made lower, that is, the temperature can be lower, and more outdoor heat can be absorbed, and more heat energy can be supplied to the indoor unit 200 in a shorter time.
The control method of the air conditioner provided by the embodiment of the invention can realize the functions of heating, heat storage, rapid heating and defrosting. By storing heat, the heat pump auxiliary heat source is used as a heat pump auxiliary heat source and the outdoor side is used as a main heat source for rapid heating in the starting stage, and the heat accumulator 320 side is used as a defrosting heat source during defrosting, so that the problem of uncomfortable heating of room air conditioners in summer, winter and cold areas is solved efficiently and rapidly. Besides, the common heating and cooling functions can be realized.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. An air conditioner, comprising:
the external machine unit is provided with a first port, a second port and a compressor;
The two ends of the inner machine unit are respectively communicated with the first port and the second port of the outer machine unit;
The three ports of the heat storage unit are respectively connected with the first port, the second port and the compressor, the heat storage unit comprises a three-way valve and a heat accumulator, the three ports of the three-way valve are respectively connected with the first port, the third port of the heat accumulator and the compressor, and the fourth port of the heat accumulator is communicated with the second port;
the inner machine unit comprises an inner machine and a first throttle valve, and the first throttle valve is arranged between the inner machine and the second port;
In a first working state, the first port is communicated with the second port through the heat storage unit, the refrigerant flows into the heat storage unit and the inner unit through the first port from the outer unit, and the refrigerant flows into the outer unit through the second port from the heat storage unit and the inner unit;
in a second working state, the second port is communicated with the compressor through the heat storage unit, the refrigerant flows into the inner unit from the outer unit through the first port, and the refrigerant flows into the outer unit and the heat storage unit from the inner unit through the second port;
in a third working state, the first throttle valve is closed, the first port is communicated with the inlet of the compressor through a four-way valve, and the outlet of the compressor is communicated with an outdoor heat exchanger through the four-way valve;
the external unit further comprises a gas-liquid separator, and the gas-liquid separator is arranged between the four-way valve and the inlet of the compressor and is used for filtering out the refrigerant in a liquid state.
2. An air conditioner according to claim 1, wherein a gas supply port is provided on the compressor, the gas supply port being for supplying gas to the compressor.
3. The air conditioner according to claim 2, wherein the outdoor unit includes:
An outdoor heat exchanger is arranged on the outside of the heat exchanger,
Four ports of the four-way valve are respectively connected with the outdoor heat exchanger, the first port, the inlet of the compressor and the outlet of the compressor, and the four-way valve is used for enabling the outdoor heat exchanger to be communicated between the inlet of the compressor and the outlet of the compressor in a switching mode;
And in the first working state or the second working state, the outdoor heat exchanger is communicated with the inlet of the compressor through the four-way valve, and the outlet of the compressor is communicated with the first port through the four-way valve.
4. An air conditioner according to any one of claims 1 to 3, further comprising:
An economizer having a temperature raising passage and a temperature lowering passage which are not communicated with each other and are capable of exchanging heat with each other,
The heating passage is communicated between a first branch of the internal unit and the second port;
the cooling passage is communicated between the second branch of the internal unit and the heat storage unit.
5. A control method of an air conditioner, characterized in that it is applied to the air conditioner of any one of claims 1 to 4, comprising:
in a state where the heat storage unit has completed heat storage:
when a rapid heating signal is received, controlling the inner unit to respectively convey the refrigerant to the heat storage unit and the outer unit through the second port;
controlling the heat storage unit to deliver the refrigerant to the compressor;
And controlling the outer machine unit to convey the refrigerant to the inner machine unit through the first port.
6. The control method of an air conditioner according to claim 5, wherein the heat storage process of the heat storage unit includes:
Controlling the outer machine unit to respectively convey the refrigerant to the inner machine unit and the heat storage unit through the first port so as to enable the heat storage unit to store heat;
And controlling the heat storage unit and the inner unit to convey the refrigerant to the outer unit through the second port.
7. A control method of an air conditioner, characterized in that it is applied to the air conditioner of any one of claims 1 to 4, comprising:
in a state where the heat storage unit has completed heat storage:
When a defrosting signal is received, controlling a second port of the external unit to convey the refrigerant to the heat storage unit;
and controlling the heat storage unit to convey the refrigerant to the first port of the external machine unit.
CN202211185534.7A 2022-09-27 2022-09-27 Air conditioner and control method thereof Active CN115507474B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104061705A (en) * 2014-06-12 2014-09-24 珠海格力电器股份有限公司 Two-stage compression air conditioning system and control method thereof
CN104567074A (en) * 2013-10-28 2015-04-29 珠海格力电器股份有限公司 Air conditioner circulating device and control method thereof
CN206269278U (en) * 2016-10-31 2017-06-20 广东美的制冷设备有限公司 Air-source heat pump air conditioning system and the air-conditioning comprising it
CN110145826A (en) * 2019-05-17 2019-08-20 青岛海尔空调电子有限公司 Air-conditioning system and its control method
CN111692708A (en) * 2020-06-16 2020-09-22 珠海格力电器股份有限公司 Air conditioning system with frosting inhibition function and frosting inhibition control method
CN211739245U (en) * 2020-01-20 2020-10-23 天津大学 Air source heat pump heating system capable of realizing cascade heat storage, heat supply and defrosting

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104567074A (en) * 2013-10-28 2015-04-29 珠海格力电器股份有限公司 Air conditioner circulating device and control method thereof
CN104061705A (en) * 2014-06-12 2014-09-24 珠海格力电器股份有限公司 Two-stage compression air conditioning system and control method thereof
CN206269278U (en) * 2016-10-31 2017-06-20 广东美的制冷设备有限公司 Air-source heat pump air conditioning system and the air-conditioning comprising it
CN110145826A (en) * 2019-05-17 2019-08-20 青岛海尔空调电子有限公司 Air-conditioning system and its control method
CN211739245U (en) * 2020-01-20 2020-10-23 天津大学 Air source heat pump heating system capable of realizing cascade heat storage, heat supply and defrosting
CN111692708A (en) * 2020-06-16 2020-09-22 珠海格力电器股份有限公司 Air conditioning system with frosting inhibition function and frosting inhibition control method

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