CN111322784A - Air conditioning unit capable of continuously heating and control method thereof - Google Patents
Air conditioning unit capable of continuously heating and control method thereof Download PDFInfo
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- CN111322784A CN111322784A CN202010208931.6A CN202010208931A CN111322784A CN 111322784 A CN111322784 A CN 111322784A CN 202010208931 A CN202010208931 A CN 202010208931A CN 111322784 A CN111322784 A CN 111322784A
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- heat exchanger
- way valve
- outdoor heat
- defrosting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning unit for continuous heating and a control method thereof, wherein the air conditioning unit comprises: the air conditioner comprises a compressor, an indoor heat exchanger, a first outdoor heat exchanger, a second outdoor heat exchanger, a first four-way valve, a second four-way valve, a first throttling element and a second throttling element; the first four-way valve and the second four-way valve are used for controlling the first outdoor heat exchanger and the second outdoor heat exchanger to defrost in turn. The invention solves the problem that the indoor unit can not output heat continuously in the defrosting process of the air conditioner in the prior art, and can ensure that the outdoor heat exchanger can defrost quickly and the indoor side room can supply heat continuously.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning unit capable of continuously heating and a control method thereof.
Background
For the existing unit type cooling and heating air conditioner, under the heating working condition of the whole unit type cooling and heating air conditioner system, the outdoor heat exchanger is used as an evaporator, the surface temperature is lower than the ambient temperature, and the surface frosting phenomenon can occur after the unit type cooling and heating air conditioner is operated for a period of time. After the frost layer is formed, the heat transfer resistance of the heat exchanger is increased, and the heat exchange efficiency of the outdoor heat exchanger is reduced. Therefore, when the heat pump system operates in a heating mode, the frost layer needs to be timely defrosted according to the temperature detection of the outdoor coil pipe sensor, the defrosting process can be converted into the cooling mode, the indoor unit cannot continuously output heat, the indoor environment temperature can be absorbed, and the customer experience is seriously influenced.
Therefore, there is an urgent need for an air conditioner that can continuously heat and operate in a low temperature environment, and that can completely defrost without affecting the long-term operation of the whole air conditioner.
Aiming at the problem that the indoor unit can not continuously output heat in the defrosting process of the air conditioner in the related art, an effective solution is not provided at present.
Disclosure of Invention
The invention provides an air conditioning unit capable of continuously heating and a control method thereof, which at least solve the problem that an indoor unit cannot continuously output heat in the defrosting process of an air conditioner in the prior art.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an air conditioning unit including: the system comprises a compressor 1, an indoor heat exchanger 2, a first outdoor heat exchanger 3, a second outdoor heat exchanger 4, a first four-way valve 5, a second four-way valve 6, a first throttling element 7 and a second throttling element 8; wherein, the first end of the first outdoor heat exchanger 3 is connected with the compressor 1 and the second four-way valve 6 through the first four-way valve 5, and the second end of the first outdoor heat exchanger 3 is connected with the second throttling element 8 through the first throttling element 7; a first end of the second outdoor heat exchanger 4 is connected with the compressor 1 and the indoor heat exchanger 2 through a second four-way valve 6, and a second end of the second outdoor heat exchanger 4 is connected with a second throttling element 8; wherein, the second throttling element 8 is also connected with the indoor heat exchanger 2; the first four-way valve 5 and the second four-way valve 6 are used for controlling the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 to defrost in turn.
Further, a port C of the first four-way valve 5 is connected to the first end of the first outdoor heat exchanger 3, a port D of the first four-way valve 5 is connected to the exhaust port of the compressor 1, a port S of the first four-way valve 5 is connected to the suction port of the compressor 1, and a port E of the first four-way valve 5 is connected to the first end of the second outdoor heat exchanger 4.
Further, a port C of the second four-way valve 6 is connected to the first end of the second outdoor heat exchanger 4 and a port E of the first four-way valve 5, a port D of the second four-way valve 6 is connected to an exhaust port of the compressor 1, a port S of the second four-way valve 6 is connected to an intake port of the compressor 1, and a port E of the first four-way valve 5 is connected to the first end of the indoor heat exchanger 2.
Further, the operation modes of the air conditioning unit at least comprise a complete heating mode; in the complete heating mode, the first four-way valve 5 and the second four-way valve 6 are both energized, and the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 both serve as evaporators for heat exchange.
Further, the operation modes of the air conditioning unit at least comprise a continuous heating defrosting mode; in the continuous heating and defrosting mode, the first four-way valve 5 is powered off and the second four-way valve 6 is powered on to defrost the first outdoor heat exchanger 3, or the first four-way valve 5 is powered on and the second four-way valve 6 is powered off to defrost the second outdoor heat exchanger 4.
Further, still include: the first check valve 9 is positioned between the port E of the second four-way valve 6 and the indoor heat exchanger 2 and used for preventing the refrigerant from flowing back to the second four-way valve 6 from the indoor heat exchanger 2; and the second check valve 10 is located between the port E of the first four-way valve 5 and the second outdoor heat exchanger 4, and is used for preventing the refrigerant from flowing back to the second outdoor heat exchanger 4 from the first four-way valve 5.
Further, the lower parts of the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 comprise water receiving trays for containing defrosting water and electric heating belts for assisting defrosting.
According to another aspect of the embodiments of the present invention, there is provided an air conditioning unit control method, applied to the air conditioning unit, including: detecting the temperature T of the outdoor defrosting bulb in the complete heating modeOuter tube(ii) a According to TOuter tubeJudging whether the air conditioning unit needs to be continuously heated and defrosted; if yes, on-off of the first four-way valve 5 and the second four-way valve 6 is controlled, and defrosting is carried out on the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 in turn.
Further, in the complete heating mode, the first four-way valve 5 and the second four-way valve 6 are both energized, and the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 both function as evaporators for heat exchange.
Further, according to TOuter tubeJudge whether air conditioning unit need carry out the defrosting of heating in succession, include: judgment of TOuter tubeWhether or not less than or equal to defrosting entry temperature T1(ii) a If so, determining that the air conditioning unit needs to continuously heat and defrost; otherwise, determining that the air conditioning unit does not need to carry out continuous heating defrosting.
Further, the on-off of the first four-way valve 5 and the second four-way valve 6 is controlled to enable the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 to defrost in turn, and the defrosting method comprises the following steps: and controlling the second four-way valve 6 to maintain the original state, powering off the first four-way valve 5, defrosting the first outdoor heat exchanger 3, and exchanging heat by using the second outdoor heat exchanger 4 as an evaporator.
Further, after the second four-way valve 6 is controlled to maintain the original state and the first four-way valve 5 is powered off, the method further comprises the following steps: judging whether the first outdoor heat exchanger 3 finishes defrosting; if yes, controlling the compressor 1 to reduce the frequency, controlling the second four-way valve 6 to be powered off, and powering on the first four-way valve 5 to defrost the second outdoor heat exchanger 4, wherein the first outdoor heat exchanger 3 is used as an evaporator to exchange heat; otherwise, the current states of the first four-way valve 5 and the second four-way valve 6 are maintained.
Further, judging whether the first outdoor heat exchanger 3 completes defrosting includes: detect the defrosting bulb temperature T of the first outdoor heat exchanger 3Outer tube 1(ii) a Judgment of TOuter tube 1Whether it is higher than defrosting entrance temperature T1(ii) a If yes, the first outdoor heat exchanger 3 is determined to be defrosted, otherwise, the first outdoor heat exchanger 3 is determined to be defrosted incompletely.
Further, after controlling the second four-way valve 6 to be powered off and the first four-way valve 5 to be powered on, the method further comprises the following steps: detects the defrosting bulb temperature T of the second outdoor heat exchanger 4Outer tube 2(ii) a Judgment of TOuter tube 2Whether it is higher than defrosting entrance temperature T1(ii) a If yes, determining that the second outdoor heat exchanger 4 finishes defrosting, and quitting continuous heating defrosting; otherwise, the current states of the first four-way valve 5 and the second four-way valve 6 are maintained.
According to yet another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
In the invention, the outdoor unit condenser is divided into two sections to be respectively controlled, a continuous heating system is formed by two four-way valves, and the two sections of the outdoor unit condenser are subjected to phase-by-phase alternate defrosting under the reversing action of the four-way valves. The outdoor heat exchanger can ensure that the shell of the existing air conditioner is not changed, the target requirement can be met only by adding the four-way valve, the problem that the indoor unit can not continuously output heat after defrosting in the heating process of the air conditioner in winter is effectively solved, quick defrosting of the outdoor heat exchanger can be ensured, and uninterrupted heat supply of an indoor room can be ensured.
Drawings
Fig. 1 is an alternative schematic diagram of refrigerant flow direction in a full heating mode according to an embodiment of the invention;
FIG. 2 is an alternative schematic diagram of the refrigerant flow direction in the continuous heating mode according to the embodiment of the invention;
fig. 3 is another alternative schematic diagram of the refrigerant flow direction in the continuous heating mode according to the embodiment of the invention;
FIG. 4 is an alternative flow chart of a defrosting control method according to an embodiment of the present invention;
FIG. 5 is another alternative flow chart of a defrost control method according to an embodiment of the present invention;
fig. 6 is a state diagram of the indoor heat exchanger and the outdoor heat exchanger in the full heating mode according to the embodiment of the present invention;
fig. 7 is a state diagram of an indoor heat exchanger and an outdoor heat exchanger in a continuous heating and defrosting mode according to an embodiment of the present invention; and
fig. 8 is another state diagram of the indoor heat exchanger and the outdoor heat exchanger in the continuous heating and defrosting mode according to the embodiment of the present invention.
Description of reference numerals:
1. a compressor; 2. an indoor heat exchanger; 3. a first outdoor heat exchanger; 4. a second outdoor heat exchanger; 5. a first four-way valve; 6. a second four-way valve; 7. a first throttling element; 8. a second throttling element; 9. a first check valve; 10. a second one-way valve.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, an air conditioning unit is provided, and specifically, fig. 1 shows an alternative structural block diagram of the apparatus, as shown in fig. 1, the unit includes:
the system comprises a compressor 1, an indoor heat exchanger 2, a first outdoor heat exchanger 3, a second outdoor heat exchanger 4, a first four-way valve 5, a second four-way valve 6, a first throttling element 7 and a second throttling element 8;
wherein, the first end of the first outdoor heat exchanger 3 is connected with the compressor 1 and the second four-way valve 6 through the first four-way valve 5, and the second end of the first outdoor heat exchanger 3 is connected with the second throttling element 8 through the first throttling element 7; a first end of the second outdoor heat exchanger 4 is connected with the compressor 1 and the indoor heat exchanger 2 through a second four-way valve 6, and a second end of the second outdoor heat exchanger 4 is connected with a second throttling element 8; wherein, the second throttling element 8 is also connected with the indoor heat exchanger 2;
the first four-way valve 5 and the second four-way valve 6 are used for controlling the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 to defrost in turn.
In the above embodiment, the outdoor unit condenser is divided into two sections to be controlled respectively, a continuous heating system is formed by two four-way valves, and the two sections of the outdoor unit condenser are defrosted in turn in stages under the reversing action of the four-way valves. The outdoor heat exchanger can ensure that the shell of the existing air conditioner is not changed, the target requirement can be met only by adding the four-way valve, the problem that the indoor unit can not continuously output heat after defrosting in the heating process of the air conditioner in winter is effectively solved, quick defrosting of the outdoor heat exchanger can be ensured, and uninterrupted heat supply of an indoor room can be ensured.
In the above embodiment, the outdoor heat exchanger is divided into the upper and lower two parts, i.e., the first outdoor heat exchanger 3 (upper part of the outdoor heat exchanger) and the second outdoor heat exchanger 4 (lower part of the outdoor heat exchanger). The matched fan can adopt a double-blade outer machine, and the upper part and the lower part of the double-blade outer machine are respectively matched with the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4.
As shown in fig. 1, a port C of the first four-way valve 5 is connected to a first end of the first outdoor heat exchanger 3, a port D of the first four-way valve 5 is connected to an exhaust port of the compressor 1, a port S of the first four-way valve 5 is connected to an intake port of the compressor 1, and a port E of the first four-way valve 5 is connected to a first end of the second outdoor heat exchanger 4. Further, a port C of the second four-way valve 6 is connected to the first end of the second outdoor heat exchanger 4 and a port E of the first four-way valve 5, a port D of the second four-way valve 6 is connected to an exhaust port of the compressor 1, a port S of the second four-way valve 6 is connected to an intake port of the compressor 1, and a port E of the first four-way valve 5 is connected to the first end of the indoor heat exchanger 2.
Preferably, the operation mode of the air conditioning unit at least comprises a complete heating mode; fig. 1 also shows a schematic flow direction diagram of a refrigerant in a complete heating mode, in the complete heating mode, the first four-way valve 5 and the second four-way valve 6 are both powered on, and the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 both serve as evaporators for heat exchange, as shown in fig. 1, the refrigerant completely enters the indoor heat exchanger through the four-way valve, exchanges heat with the indoor side, is throttled by the second throttling element 8, enters the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4, and returns to an air suction port of the compressor 1 after being evaporated.
The invention has the main invention points that the operation mode of the air conditioning unit also comprises a continuous heating defrosting mode; in the continuous heating and defrosting mode, the first four-way valve 5 is powered off and the second four-way valve 6 is powered on to defrost the first outdoor heat exchanger 3, or the first four-way valve 5 is powered on and the second four-way valve 6 is powered off to defrost the second outdoor heat exchanger 4.
Before entering the continuous heating defrosting mode, the unit is generally in a complete heating mode, namely the first four-way valve 5 and the second four-way valve 6 are powered on. After entering continuous heating and defrosting, the second four-way valve 6 maintains the original mode, the first four-way valve 5 is powered off, the refrigerant flows to the direction shown in fig. 2, a port D and a port C of the first four-way valve 5 are communicated, the high-temperature refrigerant discharged by the compressor enters the first outdoor heat exchanger 3 through DC to be condensed and release heat, the refrigerant is defrosted, and then enters the second outdoor heat exchanger 4 through the first throttling element 7 after being throttled to be evaporated and then returns to the air suction port of the compressor 1; meanwhile, when the second four-way valve 6 is electrified, the port D is communicated with the port E, and a high-temperature exhaust refrigerant of the compressor 1 enters the indoor unit heat exchanger through the port DE, then enters the second outdoor heat exchanger 4 after being throttled by the second throttling element 8, and then returns to the suction port of the compressor 1. Preferably, the opening of the second restriction element 8 is adjusted to 480 b. This control can ensure that the defrosting of the upper section of the outdoor unit, i.e., the first outdoor heat exchanger 3, is completed, while the indoor unit heats.
After the defrosting of the upper section of the external machine is finished, the continuous heating defrosting control mode enters the lower section of the external machine for defrosting: the first four-way valve 5 is powered on, the second four-way valve 6 is powered off, the flow direction of the refrigerant is as shown in figure 3, a port D and a port E of the first four-way valve 6 are communicated, the exhausted high-temperature refrigerant enters the indoor machine heat exchanger through the first four-way valve 6 to be condensed and release heat, enters the first outdoor heat exchanger 3 after being throttled by the second throttling element 8 and the first throttling element 7 to be evaporated and then returns to the suction port of the compressor 1; and a port D and a port C of the second four-way valve 6 are communicated, and a high-temperature exhaust refrigerant of the compressor enters the second outdoor heat exchanger 4 to be condensed and defrosted, is throttled by the first throttling element 7, enters the first outdoor heat exchanger 3 to be evaporated and then returns to an air suction port of the compressor 1.
The system further comprises: the first check valve 9 is positioned between the port E of the second four-way valve 6 and the indoor heat exchanger 2 and used for preventing the refrigerant from flowing back to the second four-way valve 6 from the indoor heat exchanger 2; and the second check valve 10 is located between the port E of the first four-way valve 5 and the second outdoor heat exchanger 4, and is used for preventing the refrigerant from flowing back to the second outdoor heat exchanger 4 from the first four-way valve 5.
Through this system, the implementation and the operation of this scheme can be satisfied to the outer machine of current unit formula air conditioner double fan blade, for guaranteeing to change the smoothness of frost process, the condenser middle part has the water collector, guarantees to change the frost and discharges smoothly after the liquid water, simultaneously, avoids freezing for satisfying under the abominable operating mode, still can place electric heating band, and supplementary chassis ice melting.
Example 2
Based on the air conditioning unit provided in the above embodiment 1, in a preferred embodiment 1 of the present invention, there is provided an air conditioning unit control method, which can be directly applied to various air conditioning units, especially a unit type air conditioner, and in a specific implementation, the control method can be implemented by installing software, APP, or writing a program corresponding to a controller in the air conditioning unit. In particular, fig. 4 shows an alternative flow chart of the method, which, as shown in fig. 4, comprises the following steps S402-S406:
s402: detecting the temperature T of the outdoor defrosting bulb in the complete heating modeOuter tube；
S404: according to TOuter tubeJudging whether the air conditioning unit needs to be continuously heated and defrosted;
s406: if yes, on-off of the first four-way valve 5 and the second four-way valve 6 is controlled, and defrosting is carried out on the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 in turn.
In the above embodiment, the outdoor unit condenser is divided into two sections to be controlled respectively, a continuous heating system is formed by two four-way valves, and the two sections of the outdoor unit condenser are defrosted in turn in stages under the reversing action of the four-way valves. The outdoor heat exchanger can ensure that the shell of the existing air conditioner is not changed, the target requirement can be met only by adding the four-way valve, the problem that the indoor unit can not continuously output heat after defrosting in the heating process of the air conditioner in winter is effectively solved, quick defrosting of the outdoor heat exchanger can be ensured, and uninterrupted heat supply of an indoor room can be ensured.
Regarding the above defrosting steps, fig. 5 shows a specific alternative flow chart of the method, as shown in fig. 5, the method mainly includes the following steps S501-S512:
s501: a full heating mode; in the complete heating mode, the first four-way valve 5 and the second four-way valve 6 are both energized, and the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 both serve as evaporators for heat exchange. As shown in fig. 1, the refrigerant completely enters the indoor heat exchanger through the four-way valve, exchanges heat with the indoor side, is throttled by the second throttling element 8, enters the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4, and returns to the suction port of the compressor 1 after being evaporated. The states of the indoor heat exchanger and the outdoor heat exchanger in the complete heating mode are shown in fig. 6, the indoor heat exchanger is a condensation section, and the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 are evaporation sections.
S502: detecting TOuter tubeWhether T1 is less than or equal to; if yes, entering a continuous heating defrosting mode, and then entering S504; otherwise, go to S503; wherein, according to TOuter tubeJudging whether the air conditioning unit needs to be connectedContinuing to make heat and defrost, comprising: judgment of TOuter tubeWhether or not less than or equal to defrosting entry temperature T1(ii) a If so, determining that the air conditioning unit needs to continuously heat and defrost; otherwise, determining that the air conditioning unit does not need to carry out continuous heating defrosting.
S503: maintaining the original heating mode;
s504: the second four-way valve is switched, and the opening degree of a second throttling element is 480 b; under the continuous heating defrosting, the on-off of the first four-way valve 5 and the second four-way valve 6 is controlled, so that the first outdoor heat exchanger 3 and the second outdoor heat exchanger 4 are defrosted in turn, and the defrosting method comprises the following steps: and controlling the second four-way valve 6 to maintain the original state, powering off the first four-way valve 5, defrosting the first outdoor heat exchanger 3, and exchanging heat by using the second outdoor heat exchanger 4 as an evaporator. The states of the indoor heat exchanger and the outdoor heat exchanger in the continuous heating and defrosting mode are shown in fig. 7, the indoor heat exchanger is a condensation section, the first outdoor heat exchanger 3 is a condensation section, and the second outdoor heat exchanger 4 is an evaporation section.
S505: detecting TOuter tube 1Whether > T1; if yes, entering S507; otherwise, go to S506; after the second four-way valve 6 is controlled to maintain the original state and the first four-way valve 5 is powered off, the method further comprises the following steps: judging whether the first outdoor heat exchanger 3 finishes defrosting; wherein, judge whether first outdoor heat exchanger 3 accomplishes the defrosting, include: detect the defrosting bulb temperature T of the first outdoor heat exchanger 3Outer tube 1(ii) a Judgment of TOuter tube 1Whether it is higher than defrosting entrance temperature T1(ii) a If yes, the first outdoor heat exchanger 3 is determined to be defrosted, otherwise, the first outdoor heat exchanger 3 is determined to be defrosted incompletely. If yes, controlling the compressor 1 to reduce the frequency, controlling the second four-way valve 6 to be powered off, and powering on the first four-way valve 5 to defrost the second outdoor heat exchanger 4, wherein the first outdoor heat exchanger 3 is used as an evaporator to exchange heat; otherwise, the current states of the first four-way valve 5 and the second four-way valve 6 are maintained. Another state of the indoor heat exchanger and the outdoor heat exchanger in the continuous heating and defrosting mode is shown in fig. 8, the indoor heat exchanger is a condensation section, the first outdoor heat exchanger 3 is an evaporation section, and the second outdoor heat exchanger 4 is a condensation section.
S506: maintaining the original action;
s507: the frequency of the compressor is reduced to 30hz, and the first four-way valve and the second four-way valve are reversed; after the defrosting of the upper section of the external machine is finished, the continuous heating defrosting control mode enters the lower section of the external machine for defrosting: the first four-way valve 5 is powered on, and the second four-way valve 6 is powered off.
S508: detecting TOuter tube 2Whether > T1; if yes, go to S310; otherwise, go to S509;
s509: maintaining the original action;
s510: reversing the first four-way valve;
after controlling the second four-way valve 6 to be powered off and the first four-way valve 5 to be powered on, the method further comprises the following steps: detects the defrosting bulb temperature T of the second outdoor heat exchanger 4Outer tube 2(ii) a Judgment of TOuter tube 2Whether it is higher than defrosting entrance temperature T1(ii) a If yes, determining that the second outdoor heat exchanger 4 finishes defrosting, and quitting continuous heating defrosting; otherwise, the current states of the first four-way valve 5 and the second four-way valve 6 are maintained.
S511: defrosting is finished;
s512: and (4) completely heating.
When continuous heating defrosting, firstly, the upper half section is a condensation section for defrosting, the lower half section is an evaporation section, and then the four-way valve is reversed again, and is replaced by the upper half section for evaporation and the lower half section for condensation defrosting. And after defrosting is finished, all the external machine heat exchangers are used in the evaporation section.
The invention provides a continuous heating control method, which ensures the stable switching of defrosting and heating of an external unit of an air conditioner by controlling the reversing of a four-way valve, the opening steps of an electronic expansion valve and the adjustment of the running state of a compressor. Can satisfy the user demand, reach and continuously heat the ability demand, simultaneously, can just keep original casing size, make the air conditioner under the high humid environment of low temperature, continuously heat the operation, guarantee that the air conditioner defrosts totally and the reliability fortune.
Example 3
Based on the air conditioning unit control method provided in embodiment 2 above, there is also provided in a preferred embodiment 4 of the present invention a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
In the above embodiment, the outdoor unit condenser is divided into two sections to be controlled respectively, a continuous heating system is formed by two four-way valves, and the two sections of the outdoor unit condenser are defrosted in turn in stages under the reversing action of the four-way valves. The outdoor heat exchanger can ensure that the shell of the existing air conditioner is not changed, the target requirement can be met only by adding the four-way valve, the problem that the indoor unit can not continuously output heat after defrosting in the heating process of the air conditioner in winter is effectively solved, quick defrosting of the outdoor heat exchanger can be ensured, and uninterrupted heat supply of an indoor room can be ensured.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (15)
1. An air conditioning assembly, comprising: the outdoor heat exchanger comprises a compressor (1), an indoor heat exchanger (2), a first outdoor heat exchanger (3) and a second outdoor heat exchanger (4), a first four-way valve (5) and a second four-way valve (6), a first throttling element (7) and a second throttling element (8);
wherein a first end of the first outdoor heat exchanger (3) is connected with the compressor (1) and the second four-way valve (6) through the first four-way valve (5), and a second end of the first outdoor heat exchanger (3) is connected with the second throttling element (8) through the first throttling element (7);
a first end of the second outdoor heat exchanger (4) is connected with the compressor (1) and the indoor heat exchanger (2) through the second four-way valve (6), and a second end of the second outdoor heat exchanger (4) is connected with the second throttling element (8); wherein the second throttling element (8) is also connected with the indoor heat exchanger (2);
the first four-way valve (5) and the second four-way valve (6) are used for controlling the first outdoor heat exchanger (3) and the second outdoor heat exchanger (4) to defrost in turn.
2. Air conditioning assembly according to claim 1,
the port C of the first four-way valve (5) is connected with the first end of the first outdoor heat exchanger (3), the port D of the first four-way valve (5) is connected with the exhaust port of the compressor (1), the port S of the first four-way valve (5) is connected with the suction port of the compressor (1), and the port E of the first four-way valve (5) is connected with the first end of the second outdoor heat exchanger (4).
3. Air conditioning assembly according to claim 1,
the port C of the second four-way valve (6) is connected with the first end of the second outdoor heat exchanger (4) and the port E of the first four-way valve (5), the port D of the second four-way valve (6) is connected with the exhaust port of the compressor (1), the port S of the second four-way valve (6) is connected with the suction port of the compressor (1), and the port E of the first four-way valve (5) is connected with the first end of the indoor heat exchanger (2).
4. Air conditioning assembly according to claim 1, characterized in that the operating modes of the air conditioning assembly comprise at least a full heating mode;
in the complete heating mode, the first four-way valve (5) and the second four-way valve (6) are both electrified, and the first outdoor heat exchanger (3) and the second outdoor heat exchanger (4) are both used as evaporators for heat exchange.
5. The air conditioning assembly as set forth in claim 1, wherein the operating modes of the air conditioning assembly include at least a continuous heating and defrosting mode;
in the continuous heating and defrosting mode, the first four-way valve (5) is powered off and the second four-way valve (6) is powered on, so that the first outdoor heat exchanger (3) is defrosted, or the first four-way valve (5) is powered on and the second four-way valve (6) is powered off, so that the second outdoor heat exchanger (4) is defrosted.
6. The air conditioning assembly as set forth in claim 1, further comprising:
the first check valve (9) is positioned between the E port of the second four-way valve (6) and the indoor heat exchanger (2) and is used for preventing the refrigerant from flowing back to the second four-way valve (6) from the indoor heat exchanger (2);
and the second one-way valve (10) is positioned between the E port of the first four-way valve (5) and the second outdoor heat exchanger (4) and is used for preventing the refrigerant from reversely flowing to the second outdoor heat exchanger (4) from the first four-way valve (5).
7. Air conditioning assembly according to claim 1, characterized in that the lower part of said first (3) and second (4) outdoor heat exchangers comprises a water pan for containing defrosting water and an electric heating belt for assisting defrosting.
8. An air conditioning unit control method applied to the air conditioning unit according to any one of claims 1 to 7, characterized by comprising:
detecting the temperature T of the outdoor defrosting bulb in the complete heating modeOuter tube；
According to the TOuter tubeJudging whether the air conditioning unit needs to be continuously heated and defrosted;
if yes, on-off of the first four-way valve (5) and the second four-way valve (6) is controlled, and defrosting is carried out on the first outdoor heat exchanger (3) and the second outdoor heat exchanger (4) in turn.
9. The method according to claim 8, wherein in the full heating mode, the first four-way valve (5) and the second four-way valve (6) are both energized, and the first outdoor heat exchanger (3) and the second outdoor heat exchanger (4) both exchange heat as evaporators.
10. The method of claim 8, wherein the T is based onOuter tubeJudge whether air conditioning unit need carry out the defrosting of heating in succession, include:
judging the TOuter tubeWhether or not less than or equal to defrosting entry temperature T1；
If so, determining that the air conditioning unit needs to continuously heat and defrost;
otherwise, determining that the air conditioning unit does not need to carry out continuous heating and defrosting.
11. The method as claimed in claim 9, wherein controlling the on/off of the first four-way valve (5) and the second four-way valve (6) to defrost the first outdoor heat exchanger (3) and the second outdoor heat exchanger (4) in turn comprises:
and controlling the second four-way valve (6) to maintain the original state, switching off the first four-way valve (5) to defrost the first outdoor heat exchanger (3), and using the second outdoor heat exchanger (4) as an evaporator to exchange heat.
12. The method of claim 11, wherein after controlling the second four-way valve (6) to remain in an original state and the first four-way valve (5) to be de-energized, further comprising:
judging whether the first outdoor heat exchanger (3) finishes defrosting or not;
if yes, controlling the compressor (1) to reduce the frequency, controlling the second four-way valve (6) to be powered off, and powering on the first four-way valve (5) to defrost the second outdoor heat exchanger (4), wherein the first outdoor heat exchanger (3) is used as an evaporator to exchange heat;
otherwise, the current states of the first four-way valve (5) and the second four-way valve (6) are maintained.
13. The method according to claim 12, wherein determining whether the first outdoor heat exchanger (3) is defrosted comprises:
detecting the defrosting bulb temperature T of the first outdoor heat exchanger (3)Outer tube 1；
Judging the TOuter tube 1Whether it is higher than defrosting entrance temperature T1；
If yes, determining that the first outdoor heat exchanger (3) finishes defrosting, otherwise, determining that the first outdoor heat exchanger (3) does not finish defrosting.
14. The method of claim 12, wherein after controlling the second four-way valve (6) to be de-energized and the first four-way valve (5) to be energized, further comprising:
detecting the defrosting bulb temperature T of the second outdoor heat exchanger (4)Outer tube 2；
Judging the TOuter tube 2Whether it is higher than defrosting entrance temperature T1；
If yes, determining that the second outdoor heat exchanger (4) completes defrosting, and quitting continuous heating defrosting;
otherwise, the current states of the first four-way valve (5) and the second four-way valve (6) are maintained.
15. A storage medium containing computer-executable instructions for performing the air conditioning pack control method of any of claims 8 to 14 when executed by a computer processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010208931.6A CN111322784A (en) | 2020-03-23 | 2020-03-23 | Air conditioning unit capable of continuously heating and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010208931.6A CN111322784A (en) | 2020-03-23 | 2020-03-23 | Air conditioning unit capable of continuously heating and control method thereof |
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| CN111322784A true CN111322784A (en) | 2020-06-23 |
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| CN202010208931.6A Pending CN111322784A (en) | 2020-03-23 | 2020-03-23 | Air conditioning unit capable of continuously heating and control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161378A (en) * | 2020-09-07 | 2021-01-01 | 珠海格力电器股份有限公司 | Outdoor unit defrosting control method and device and air conditioner |
| CN115419965A (en) * | 2022-09-14 | 2022-12-02 | 珠海格力电器股份有限公司 | Air conditioner and control method and device thereof |
| WO2023060882A1 (en) * | 2021-10-11 | 2023-04-20 | 青岛海尔空调器有限总公司 | Air conditioner |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997041398A1 (en) * | 1996-05-02 | 1997-11-06 | Store Heat And Produce Energy, Inc. | Defrost operation for heat pump and refrigeration systems |
| CN202598949U (en) * | 2012-03-23 | 2012-12-12 | 上海金龙制冷技术有限公司 | Hot water defrosting system and air source and air conditioner water heating all-in-one machine |
| CN103968503A (en) * | 2014-04-14 | 2014-08-06 | 广东美的暖通设备有限公司 | Air conditioner outdoor unit, and defrosting method and device for air conditioner |
| CN104654461A (en) * | 2015-01-29 | 2015-05-27 | 珠海格力电器股份有限公司 | Air conditioner capable of continuously heating and defrosting and control method of air conditioner |
| CN105758075A (en) * | 2016-04-01 | 2016-07-13 | 珠海格力电器股份有限公司 | Sectional type heating and defrosting air-conditioning system and heating and defrosting control method implemented by same |
| CN106871345A (en) * | 2017-02-06 | 2017-06-20 | 邯郸美的制冷设备有限公司 | Defrosting system and air-conditioner are not shut down |
| CN108800687A (en) * | 2018-05-21 | 2018-11-13 | 顺德职业技术学院 | Dual chamber external heat exchanger heat pump with defrosting function and defrosting method |
| CN110173917A (en) * | 2019-06-21 | 2019-08-27 | 珠海格力电器股份有限公司 | Air-conditioning system and its control method |
| WO2020055653A1 (en) * | 2018-09-14 | 2020-03-19 | Carrier Corporation | Heat pump system, defrosting method for a heat pump system, and controller |
| CN211876411U (en) * | 2020-03-23 | 2020-11-06 | 珠海格力电器股份有限公司 | Air conditioning unit capable of continuously heating |
-
2020
- 2020-03-23 CN CN202010208931.6A patent/CN111322784A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997041398A1 (en) * | 1996-05-02 | 1997-11-06 | Store Heat And Produce Energy, Inc. | Defrost operation for heat pump and refrigeration systems |
| CN202598949U (en) * | 2012-03-23 | 2012-12-12 | 上海金龙制冷技术有限公司 | Hot water defrosting system and air source and air conditioner water heating all-in-one machine |
| CN103968503A (en) * | 2014-04-14 | 2014-08-06 | 广东美的暖通设备有限公司 | Air conditioner outdoor unit, and defrosting method and device for air conditioner |
| CN104654461A (en) * | 2015-01-29 | 2015-05-27 | 珠海格力电器股份有限公司 | Air conditioner capable of continuously heating and defrosting and control method of air conditioner |
| CN105758075A (en) * | 2016-04-01 | 2016-07-13 | 珠海格力电器股份有限公司 | Sectional type heating and defrosting air-conditioning system and heating and defrosting control method implemented by same |
| CN106871345A (en) * | 2017-02-06 | 2017-06-20 | 邯郸美的制冷设备有限公司 | Defrosting system and air-conditioner are not shut down |
| CN108800687A (en) * | 2018-05-21 | 2018-11-13 | 顺德职业技术学院 | Dual chamber external heat exchanger heat pump with defrosting function and defrosting method |
| WO2020055653A1 (en) * | 2018-09-14 | 2020-03-19 | Carrier Corporation | Heat pump system, defrosting method for a heat pump system, and controller |
| CN110173917A (en) * | 2019-06-21 | 2019-08-27 | 珠海格力电器股份有限公司 | Air-conditioning system and its control method |
| CN211876411U (en) * | 2020-03-23 | 2020-11-06 | 珠海格力电器股份有限公司 | Air conditioning unit capable of continuously heating |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161378A (en) * | 2020-09-07 | 2021-01-01 | 珠海格力电器股份有限公司 | Outdoor unit defrosting control method and device and air conditioner |
| WO2023060882A1 (en) * | 2021-10-11 | 2023-04-20 | 青岛海尔空调器有限总公司 | Air conditioner |
| CN115419965A (en) * | 2022-09-14 | 2022-12-02 | 珠海格力电器股份有限公司 | Air conditioner and control method and device thereof |
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