CN111102774A - Air conditioning system capable of realizing uninterrupted heating, control method of air conditioning system and air conditioning equipment - Google Patents
Air conditioning system capable of realizing uninterrupted heating, control method of air conditioning system and air conditioning equipment Download PDFInfo
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- CN111102774A CN111102774A CN202010121494.4A CN202010121494A CN111102774A CN 111102774 A CN111102774 A CN 111102774A CN 202010121494 A CN202010121494 A CN 202010121494A CN 111102774 A CN111102774 A CN 111102774A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 169
- 238000004378 air conditioning Methods 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005338 heat storage Methods 0.000 claims abstract description 118
- 238000010257 thawing Methods 0.000 claims abstract description 67
- 230000005611 electricity Effects 0.000 claims abstract description 3
- 239000003507 refrigerant Substances 0.000 claims description 98
- 239000007788 liquid Substances 0.000 claims description 83
- 238000011084 recovery Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 11
- 238000005057 refrigeration Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000004044 response Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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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
- F25B47/022—Defrosting cycles hot gas defrosting
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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
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F25B31/00—Compressor 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
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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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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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses an air conditioning system capable of continuously heating, a control method thereof and air conditioning equipment. Wherein, this air conditioning system includes: a four-way valve and a heat storage module; the four-way valve is used for obtaining electricity when the air conditioning system needs to enter a normal heating mode, and a first end of the four-way valve is communicated with a second end and a fourth end of the four-way valve is communicated with a third end; when the air conditioning system needs to enter a defrosting and heating mode, the air conditioning system loses power, the first end of the air conditioning system is communicated with the fourth end, and the second end of the air conditioning system is communicated with the third end; the heat storage module is used for conducting in the direction from the second end of the heat storage module to the second end of the outdoor unit heat exchanger to store heat when the air conditioning system needs to enter a normal heating mode; and when the air conditioning system needs to enter a defrosting and heating mode, the heat storage module is communicated in the direction from the second end of the indoor unit heat exchanger to the second end of the heat storage module, so that heating circulation in the defrosting and heating mode is realized. By the invention, uninterrupted heating can be realized when the outdoor unit heat exchanger is defrosted, and the comfort of an air conditioning system is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system capable of continuously heating, a control method of the air conditioning system and air conditioning equipment.
Background
When the heat pump air conditioner is in heating operation, the outdoor heat exchanger serves as an evaporator, a flowing refrigerant evaporates and absorbs heat, the temperature is low, when the temperature is lower than 0 ℃, and an outdoor environment has certain humidity, the outdoor heat exchanger can gradually frost, and the heat exchange effect of the outdoor heat exchanger is affected after the frosting is serious. In a conventional air conditioning system, when the frosting of an outdoor heat exchanger is detected to be serious, a unit is reversed through a four-way valve, and the outdoor heat exchanger is switched to a high-pressure side for defrosting. But at this moment, the heat exchanger of the indoor unit is in a refrigerating state, evaporation and heat absorption are carried out, the indoor temperature is reduced, and the comfort is affected. In the existing market, aiming at the problem of poor heating comfort in defrosting, a scheme of adding an electric auxiliary heating device to an indoor unit heat exchanger is mainly adopted, but the scheme is not energy-saving due to large power of the electric auxiliary heating device, and the phenomena of frequent defrosting and low heating capacity of an air-conditioning system during low-temperature heating are not relieved.
Aiming at the problem that the comfort is influenced by refrigeration of an air conditioning system during defrosting in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides an air conditioning system capable of heating without interruption, a control method thereof and air conditioning equipment, and aims to solve the problem that comfort is affected when the air conditioning system is refrigerated during defrosting in the prior art.
In order to solve the above technical problem, the present invention provides an air conditioning system with uninterrupted heating, wherein the system comprises:
compressor, indoor set heat exchanger and off-premises station heat exchanger, the exhaust end of compressor with the first end intercommunication of indoor set heat exchanger, its characterized in that, the system still includes: a four-way valve and a heat storage module;
the first end of the four-way valve is communicated with the exhaust end of the compressor, the second end of the four-way valve is communicated with the first end of the heat storage module, the third end of the four-way valve is communicated with the air suction end of the compressor, the fourth end of the four-way valve is communicated with the first end of the outdoor unit heat exchanger and used for obtaining electricity when the air conditioning system needs to enter a normal heating mode, the first end of the four-way valve is communicated with the second end of the four-way valve, and the fourth end of; when the air conditioning system needs to enter a defrosting and heating mode, the air conditioning system loses power, the first end of the air conditioning system is communicated with the fourth end, and the second end of the air conditioning system is communicated with the third end;
the second end of the heat storage module is respectively communicated with the second end of the indoor unit heat exchanger and the second end of the outdoor unit heat exchanger; the heat storage module is used for conducting in the direction from the second end of the heat storage module to the second end of the outdoor unit heat exchanger to store heat when the air conditioning system needs to enter a normal heating mode; and when the air conditioning system needs to enter a defrosting and heating mode, the heat storage module is communicated in the direction from the second end of the indoor unit heat exchanger to the second end of the heat storage module, so that heating circulation in the defrosting and heating mode is realized.
Furthermore, the heat storage module is further configured to conduct in a direction from the second end of the outdoor unit heat exchanger to the second end of the heat storage module when the air conditioning system needs to enter the defrosting and heating mode, so that the heat storage module heats a liquid refrigerant discharged after defrosting of the outdoor unit heat exchanger, and defrosting circulation in the defrosting and heating mode is achieved.
Further, the system further comprises:
and the gas-liquid separator is arranged between the third end of the four-way valve and the air suction end of the compressor and is used for separating gaseous refrigerants and liquid refrigerants.
Further, the system further comprises:
and the heating device is arranged between the gas-liquid separator and the air suction end of the compressor and is used for heating the liquid refrigerant separated by the gas-liquid separator so that the liquid refrigerant returns to the compressor after being converted into a gas state.
Further, the system further comprises:
and the first valve is arranged between the second end of the heat storage module and the second end of the indoor unit heat exchanger, is opened when the air conditioning system needs to enter a normal heating mode or a defrosting heating mode, and is closed when the air conditioner runs in a refrigeration mode.
Further, the system further comprises:
and the second valve is arranged between the second end of the four-way valve and the heat storage module and is used for being opened when the air conditioning system needs to enter a normal heating mode or a defrosting heating mode and being closed when the air conditioner runs in a refrigerating mode.
A control method of an air conditioning system for uninterrupted heating is applied to the air conditioning system, and is characterized by comprising the following steps:
judging whether the air conditioning system needs to enter a normal heating mode or a defrosting heating mode;
and controlling the power-on state of the four-way valve according to the heating mode which needs to be entered by the air conditioning system, and further controlling the conduction direction between the heat storage module and the outdoor unit heat exchanger or the conduction direction between the heat storage module and the indoor unit heat exchanger.
Further, according to the heating mode that air conditioning system need get into the on-state of control cross valve, and then control the direction of conducting between heat accumulation module and the off-premises station heat exchanger, include:
and if the air conditioning system needs to enter a normal heating mode, controlling the four-way valve to be electrified to enable the first end and the second end of the four-way valve to be communicated, and enabling the fourth end and the third end to be communicated, so as to control the second end of the heat storage module to be communicated with the second end of the outdoor unit heat exchanger.
Further, according to the heating mode control cross valve on-state that air conditioning system need get into, and then control the direction of conducting between heat accumulation module and the indoor set heat exchanger, include:
and if the air conditioning system needs to enter a defrosting and heating mode, controlling the four-way valve to lose power, controlling the conduction of the second end and the third end of the four-way valve, and further controlling the conduction of the second end of the heat exchanger of the indoor unit to the second end of the heat storage module.
Further, while controlling the direction conduction from the second end of the heat exchanger of the indoor unit to the second end of the heat storage module, the method further comprises: and controlling the direction conduction from the second end of the outdoor heat exchanger to the second end of the heat storage module.
Further, before determining whether the air conditioning system needs to enter the normal heating mode or the defrosting heating mode, the method further includes:
judging an operation mode to be entered by an air conditioning system and a last operation mode, wherein the operation modes comprise: a cooling mode and a heating mode;
and if the operation mode to be entered by the air conditioning system is a refrigerating mode and the last operation mode is a heating mode, controlling the air conditioning system to start a refrigerant recovery mode.
Further, control air conditioning system and start refrigerant and retrieve the mode, include:
controlling the first valve to be opened and the second valve to be closed;
after a preset time, controlling the first valve to be closed;
the first valve is arranged between the heat storage module and the second end of the indoor unit heat exchanger, and the second valve is arranged between the second end of the four-way valve and the first end of the heat storage module.
The invention also provides a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the above-mentioned method.
The invention also provides air conditioning equipment which comprises the air conditioning system for uninterrupted heating or a control method of the air conditioning system for uninterrupted heating.
By applying the technical scheme of the invention, when the air conditioner defrosts, the liquid refrigerant discharged by the heat exchanger of the indoor unit is heated by the heat storage module and is converted into a gas state to return to the compressor, so that the heating cycle in the defrosting and heating mode is realized, uninterrupted heating can be realized when the heat exchanger of the outdoor unit defrosts, and the comfort of the air conditioning system is improved.
Drawings
Fig. 1 is a structural view of an air conditioning system according to an embodiment of the present invention;
fig. 2 is a structural view of an air conditioning system according to another embodiment of the present invention;
fig. 3 is a structural view of an air conditioning system according to still another embodiment of the present invention;
fig. 4 is a refrigerant flow diagram of a cooling mode of the air conditioning system according to the embodiment of the present invention;
fig. 5 is a refrigerant flow diagram of a heating mode of the air conditioning system according to the embodiment of the present invention;
fig. 6 is a refrigerant flow diagram of a defrosting mode of an air conditioning system according to an embodiment of the present invention;
fig. 7 is a flowchart of a control method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe valves in embodiments of the present invention, the valves should not be limited to these terms. These terms are only used to distinguish the valves. For example, a first valve may also be referred to as a second valve, and similarly, a second valve may also be referred to as a first valve, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
Fig. 1 is a structural diagram of an air conditioning system according to an embodiment of the present invention, and as shown in fig. 1, the air conditioning system includes: compressor 11, indoor set heat exchanger 12 and outdoor unit heat exchanger 13, the first end intercommunication of compressor 11's exhaust end and indoor set heat exchanger 12, this air conditioning system still includes: a four-way valve 14 and a heat storage module 15;
a first end a of the four-way valve 14 is communicated with an exhaust end of the compressor 11, a second end b is communicated with a first end of the heat storage module 15, a third end c is communicated with a suction end of the compressor 11, a fourth end d is communicated with a first end of the outdoor unit heat exchanger 13, when the air conditioning system needs to enter a normal heating mode, the four-way valve 14 is powered on, so that the first end a and the second end b of the four-way valve 14 are conducted, and the fourth end d and the third end c are conducted, so that gas exhausted by the compressor 11 firstly passes through the heat storage module 15, then passes through the outdoor unit heat exchanger 13, sequentially passes through the fourth end d and the third end c of the four-way valve 14 and then returns; when the air conditioning system needs to enter a defrosting and heating mode, the four-way valve 14 loses power, the first end a and the fourth end d of the four-way valve are communicated, the second end b and the third end c of the four-way valve are communicated, and then liquid refrigerant discharged by the indoor unit heat exchanger 12 passes through the heat storage module 15, is evaporated into gas, enters the second end b of the four-way valve 14, passes through the third end c of the four-way valve 14 and then returns to the air suction end of the compressor 11, and heating circulation is completed;
the second end of the heat storage module 15 is respectively communicated with the second end of the indoor heat exchanger 12 and the first end of the outdoor heat exchanger 13; when the air conditioning system needs to enter a normal heating mode, because the conduction relationship inside the four-way valve 14 is that the first end and the second end are conducted, a high-temperature and high-pressure refrigerant discharged by the compressor 11 sequentially enters the first end of the heat storage module 15 through the first end a and the second end b of the four-way valve 14, heat is released in the heat storage module 15, so that the heat storage module 15 stores heat, the refrigerant after heat release flows to the direction of the second end of the outdoor unit heat exchanger 13 along the second end of the heat storage module 15, flows into the fourth end d of the four-way valve 14 through the first end of the outdoor unit heat exchanger 13, and because the fourth end d of the four-way valve 14 is conducted with the third end c, the refrigerant after heat release flows out from the third end c of the four-way; when the air conditioning system needs to enter the defrosting and heating mode, the air conditioning system is conducted in the direction from the second end of the indoor unit heat exchanger 12 to the second end of the heat storage module 15, and the heat storage module 15 heats the liquid refrigerant discharged by the indoor unit heat exchanger 12 to evaporate the liquid refrigerant, so that the heating cycle in the defrosting and heating mode is realized.
The heat storage module 15 may be configured to not only implement a heating cycle in the defrosting and heating mode, but also heat a liquid refrigerant discharged after defrosting the outdoor heat exchanger 13, so that the liquid refrigerant is evaporated and then returned to the compressor 11, so as to implement a defrosting cycle, and specifically, when the air conditioning system needs to enter the defrosting and heating mode, the heat storage module 15 is conducted in a direction from the second end of the outdoor heat exchanger 13 to the second end of the heat storage module 15, so that the heat storage module 15 heats the liquid refrigerant discharged after defrosting the outdoor heat exchanger 13, so as to implement a defrosting cycle in the defrosting and heating mode.
It should be noted that, in order to highlight the focus of the present invention, the flow direction of the refrigerant in the heat storage module 15 in different heating modes is described in detail in this embodiment, it should be understood by those skilled in the art that, in the heating process of a conventional air conditioner, a high-temperature and high-pressure gaseous refrigerant discharged from the compressor 11 first enters the indoor heat exchanger 12, is liquefied and releases heat in the indoor heat exchanger 12, then is discharged to the outdoor heat exchanger 13, passes through the outdoor heat exchanger 13 and returns to the compressor 11, and completes a heating cycle.
The air conditioning system of this embodiment, when defrosting, through the heating of heat accumulation module to the discharged liquid refrigerant of indoor set heat exchanger, make it turn into the gaseous state, get back to the compressor to realize the heating cycle, can realize when outdoor unit heat exchanger defrosting, incessant heating improves air conditioning system's travelling comfort.
Example 2
In this embodiment, another air conditioning system for heating without interruption is provided, and fig. 2 is a structural diagram of an air conditioning system according to another embodiment of the present invention, in order to prevent a refrigerant that has been changed into a liquid state by heat release in the heating system from entering a compressor 11, as shown in fig. 2, on the basis of the above embodiment, the air conditioning system further includes: and a gas-liquid separator 16 disposed between the third end c of the four-way valve 14 and a suction end of the compressor 11, for separating a gaseous refrigerant and a liquid refrigerant discharged from the third end c of the four-way valve 14, and collecting the liquid refrigerant, while allowing only the gaseous refrigerant to return to the compressor 11.
After the gas-liquid separator 16 collects the liquid refrigerant, the amount of refrigerant flowing in the heating cycle system is reduced, if the air-conditioning system is operated for a long time, the refrigerant participating in heating in the air-conditioning system is less and less, and in order to return the liquid refrigerant collected by the gas-liquid separator 16 to the heating cycle system, on the basis of the above embodiment, the air-conditioning system further includes: the heating device 17 is disposed between the gas-liquid separator and the air suction end of the compressor 11, and includes a tank 171 and a heating element 172, the tank 171 is used for containing liquid refrigerant, and the heating element 172 is used for heating the liquid refrigerant in the tank 172, so that the liquid refrigerant returns to the compressor 11 after being converted into gas.
The air conditioning system is not only used for heating but also for cooling, and the heat storage module 15 is not required to be opened during cooling of the air conditioner, and in order to adapt to different operation modes of the air conditioner, as shown in fig. 2, on the basis of the above embodiment, the air conditioning system further includes: the first valve 18 is arranged between the second end of the heat storage module 15 and the second end of the indoor unit heat exchanger 12, when the air conditioning system needs to enter a normal heating mode or a defrosting heating mode, the first valve 18 is opened so that a refrigerant discharged from the indoor unit heat exchanger 12 enters the heat storage module 15 to absorb heat and then is evaporated and returns to the compressor 11 to complete a heating cycle in the defrosting heating mode, and when the air conditioner runs in a cooling mode, the first valve 18 is closed to isolate the heat storage module 15 from a refrigeration cycle system.
The first valve 18 is closed, so that only the pipeline between the heat exchanger 12 of the indoor unit and the heat storage module 15 can be blocked, and the heat storage module 15 can still be conducted with the second end of the four-way valve 14, so that the high-temperature and high-pressure refrigerant discharged by the compressor 11 enters the heat storage module 15 and cannot be discharged, which not only results in the waste of the refrigerant, but also may affect the next use of the heat storage module 15, as shown in fig. 2, in order to solve the above problems, on the basis of the above embodiment, the air conditioning system further includes: and a second valve 19 disposed between the second end b of the four-way valve 14 and the heat storage module 15, wherein when the air conditioning system needs to enter a normal heating mode, the second valve 19 is opened to allow a high-temperature and high-pressure refrigerant discharged from the compressor 11 to enter and store heat, and when the air conditioning system needs to enter a defrosting heating mode, the second valve 19 is continuously opened to allow a gaseous refrigerant evaporated by heat absorption to enter the second end b of the four-way valve 14 through the heat storage module 15, and then discharged from the third end c of the four-way valve 14, and then returned to the compressor 11 through the gas-liquid separator and the heating device 17 to complete a heating cycle, and when the air conditioning system operates in a cooling mode, the second valve 19 is closed to completely isolate a refrigeration cycle system of the heat storage module 15.
Example 3
In this embodiment, another air conditioning system without continuous heating is provided, fig. 3 is a structural diagram of an air conditioning system according to another embodiment of the present invention, as shown in fig. 3, on the basis of a conventional heat pump system, a first four-way valve 33 and a second four-way valve 34 are respectively disposed at exhaust ports of an oil separator 32 at an exhaust end of a compressor 31, wherein the first four-way valve 33 includes a first port a1, a second port b1, a third port c1, and a fourth port d1, the second four-way valve 34 includes a first port a2, a second port b2, a third port c2, and a fourth port d2, the exhaust ports of the oil separator 32 are respectively communicated with the first port a1 of the first four-way valve 33 and the first port a2 of the second four-way valve 34, and a heat storage module 35 is disposed between a pipeline where a heating expansion valve EXV3 is located and the second port b1 of the first four-way valve 33.
Fig. 4 is a refrigerant flow diagram of a refrigeration mode of the air conditioning system according to an embodiment of the present invention, as shown in fig. 4, when the first four-way valve 33 and the second four-way valve 34 are both de-energized in the refrigeration mode, a high-temperature and high-pressure refrigerant discharged from the compressor flows through the oil-gas separator 32, sequentially passes through the first interface a1 and the second interface b1 of the first four-way valve 33, enters the outdoor heat exchanger 36 (i.e., the outdoor heat exchanger 13 in the above embodiment) to be condensed and release heat into a liquid refrigerant, is throttled and decompressed into a gas-liquid mixed state by the refrigeration expansion valve EXV1, passes through the indoor heat exchanger 37 (i.e., the indoor heat exchanger 12 in the above embodiment) to absorb heat and evaporate, and turns into a gas refrigerant, which returns to the gas-liquid separator 38, and is finally sucked by the suction end of the compressor 31 to be recompressed, so as to complete a refrigeration cycle, not used; the heating tank 39, the liquid inlet valve 310 and the gas outlet valve 312 are all closed and are not used.
When the system starts a refrigeration mode and detects that the last operation is heating operation, refrigerant exists in the heat storage module 35, at this time, the heat storage module 35 starts a refrigerant recovery mode, the second heat storage solenoid valve 314 is closed, the heat storage expansion valve EXV2 and the first heat storage solenoid valve 313 are opened, and after a refrigerant recovery time set value a, all the valves are closed, and in this mode, the rest of the system control is consistent with the normal refrigeration control.
Fig. 5 is a refrigerant flow diagram of a heating mode of the air conditioning system according to the embodiment of the present invention, as shown in fig. 5, in the heating mode, both the first four-way valve 33 and the second four-way valve 34 are powered, the first heat storage solenoid valve 313 and the second heat storage solenoid valve 314 and the heat storage expansion valve EXV2 are opened, most of the high-temperature and high-pressure refrigerant after passing through the oil-gas separator 32, which is discharged from the compressor 31, passes through the first a2 and the second b2 of the second four-way valve 34 in sequence, flows to the indoor heat exchanger 37 for heating, and is condensed to be in a liquid state after releasing heat, and returns to the outdoor heat exchanger; the other small part of the refrigerant flows into the heat storage module 35 for heat storage through the first interface a1 and the second interface b1 of the first four-way valve 33 in sequence, the gaseous refrigerant releases heat and is condensed into liquid in the heat storage module 35, then the liquid refrigerant is converged with the liquid refrigerant of the indoor heat exchanger 37, and then the liquid refrigerant is throttled and decompressed by the heating expansion valve EXV3 to become a gas-liquid mixed refrigerant, the gas refrigerant is absorbed and evaporated in the outdoor heat exchanger 36 to become the gaseous refrigerant, and the gaseous refrigerant passes through the fourth interface d1 and the third interface c1 of the first four-way valve 33 in sequence and returns to the compressor through the gas-liquid separator 38 and the heating tank 39, so that.
When the frost formation of the outdoor heat exchanger 36 is thick, the heat exchange effect is reduced, so that the liquid refrigerant is incompletely evaporated and is stored in the gas-liquid separator 38, and when the difference between the suction temperature of the compressor and the inlet pipe temperature of the gas-liquid separator 38 is detected to be smaller than a preset value B, the liquid inlet valve 310 is opened, the electric heating component 311 at the bottom of the heating tank 39 works to heat and evaporate the liquid refrigerant into a gaseous state, and then the gaseous refrigerant returns to the circulation of the system again through the exhaust valve, so that the heating quantity is improved.
Fig. 6 is a refrigerant flow diagram of a defrosting mode of the air conditioning system according to an embodiment of the present invention, as shown in fig. 6, in the defrosting mode, the first four-way valve 33 is de-energized, the second four-way valve 34 is energized, the first heat storage solenoid valve 313, the second heat storage solenoid valve 314, and the heat storage expansion valve EXV2 are opened, a portion of the high-temperature and high-pressure refrigerant passes through the first port a2 and the second port b2 of the second four-way valve 34 in sequence to flow to the indoor heat exchanger 37 for heating, and the other portion of the high-temperature and high-pressure refrigerant passes through the first port a1 and the fourth port d1 of the first four-way valve 33 in sequence to flow into the outdoor heat exchanger 36 for defrosting, and after condensing, the refrigerant forms a liquid refrigerant, and after the liquid refrigerant is collected and flows into the branch where the heat storage module 35 is located, and after throttling, absorbing heat and evaporating through the heat storage expansion valve.
The bottom of the gas-liquid separator 38 is provided with a heating tank 39, a connecting pipeline with a liquid inlet valve 310 is arranged between the bottom of the gas-liquid separator 38 and the heating tank 39 and used for collecting liquid refrigerants accumulated in the gas-liquid separator 38, and the electric heating component 311 works to evaporate the liquid refrigerants into gaseous states, so that the situation that the liquid refrigerants are not completely evaporated when the system is heated at low temperature and the heating quantity is attenuated and frost is removed due to accumulated liquid in the gas-liquid separator 38 is avoided. The refrigerant from the heating tank enters the air suction end of the compressor to complete a heating and defrosting cycle.
In order to control the opening time of the gas-liquid separator 38, the gas-liquid separator 38 may be controlled to be opened according to a difference between the temperature of the suction end of the compressor 31 and the temperature of the inlet end of the gas-liquid separator 38, if it is detected that the difference between the temperature of the suction end of the compressor 31 and the temperature of the inlet end of the gas-liquid separator 38 is less than a preset value B, it indicates that the liquid refrigerant is not completely evaporated in the heat storage module 35 and is accumulated in the gas-liquid separator 38, the liquid inlet valve 310 is opened, and the electric heating component 311 in the heating tank operates to heat and evaporate the liquid refrigerant into a gaseous state, and then the gaseous refrigerant returns to the circulation of the system through the exhaust valve, so that no liquid refrigerant is accumulated in the gas-liquid separator.
In the embodiment, a double four-way valve structure is adopted, so that the exhaust gas of the compressor can be simultaneously supplied to an indoor heat exchanger and an outdoor heat exchanger for heating and defrosting when the system is defrosted; a heat storage module is arranged between the outdoor heat exchanger and the heating expansion valve pipeline, a first heat storage solenoid valve, a second heat storage solenoid valve and a heat storage expansion valve are arranged at two ends of the heat storage module, one end of the second heat storage solenoid valve is connected to a second interface of the first four-way valve, the heat storage module stores heat during normal heating, and during systematic defrosting, liquid refrigerants condensed by defrosting of the indoor heat exchanger and the outdoor heat exchanger flow through the branch, are throttled and depressurized by the heat storage electronic expansion valve, absorb heat in the heat storage module, are evaporated and return to the gas-liquid separator; the heating tank is arranged between the gas-liquid separator and the compressor, and collects liquid refrigerants which are not completely evaporated and flow through the heat storage module when the system is heated at a low temperature and defrosted by the heating tank, and then the refrigerants are evaporated by heating, so that the problem that the low-temperature heating gas-liquid separator is easy to accumulate liquid and reduce the heating quantity is solved; during defrosting, the liquid refrigerant can be completely evaporated, no liquid refrigerant is accumulated in the gas-liquid separator, the defrosting effect is improved, the damage caused by liquid return operation of the compressor is avoided, and the continuous heating function is realized; the electromagnetic valves in the front and the back of the heat storage module can realize the functions of automatically discharging and isolating the refrigerant of the heat storage module when the system is used for refrigerating, so that the heat storage module hardly influences the refrigerating of the system.
Example 4
The present embodiment provides a method for controlling an air conditioning system with uninterrupted heating, and fig. 7 is a flowchart of the control method according to the embodiment of the present invention, as shown in fig. 7, the method includes:
s101, judging whether the air conditioning system needs to enter a normal heating mode or a defrosting heating mode; the air conditioner is judged to be in a normal heating mode or a defrosting heating mode, and the judgment can be carried out by judging the difference value between the temperature value detected by a defrosting temperature sensing bulb arranged on an outdoor unit heat exchanger and the current environment temperature, specifically, if the difference value is smaller than or equal to a preset threshold value, the outdoor unit heat exchanger is judged to be frosted, the defrosting heating mode is required to be entered, and if the difference value is larger than the preset threshold value, the outdoor unit heat exchanger is judged not to be frosted, and the normal heating mode is required to be entered.
And S102, controlling the power-on state of the four-way valve according to a heating mode which needs to be entered by the air conditioning system, and further controlling the conduction direction between the heat storage module and the outdoor unit heat exchanger or the conduction direction between the heat storage module and the indoor unit heat exchanger.
In order to implement the normal heating mode for controlling the operation of the air conditioner, step S102 specifically includes: and if the air conditioning system needs to enter a normal heating mode, controlling the four-way valve to be electrified to enable the first end and the second end of the four-way valve to be communicated, and enabling the fourth end and the third end to be communicated, so as to control the second end of the heat storage module to be communicated with the second end of the outdoor unit heat exchanger.
In order to implement the defrosting and heating mode for controlling the operation of the air conditioner, step S102 further includes: and if the air conditioning system needs to enter a defrosting and heating mode, controlling the four-way valve to lose power so as to control the conduction of the second end and the third end of the four-way valve and further control the conduction of the second end of the heat exchanger of the indoor unit to the second end of the heat storage module.
After the defrosting and heating mode of the air conditioner is controlled to operate, the second end of the heat exchanger of the indoor unit is controlled to be communicated with the second end of the heat storage module, so that heating circulation is realized, and meanwhile, the refrigerant used for heat release and defrosting is required to be discharged out of the heat exchanger of the outdoor unit.
The steps are used for controlling the air conditioning system in the heating mode, but generally, the air conditioning system is not only used for heating, but also used for cooling, when the air conditioning system operates in the cooling mode, before, if the last operation is in the heating mode, residual refrigerants still exist in the heating module, and in order to recycle the residual refrigerants, before judging that the air conditioning system needs to enter a normal heating mode or a defrosting heating mode, the cooling mode or the heating mode which the air conditioning system is about to enter is judged, and before the air conditioning system operates in the cooling mode or the heating mode in the last time, the cooling mode or the heating mode is judged; if the operation mode that air conditioning system will get into is the refrigeration mode, and the operation mode of last time is the mode of heating, then control air conditioning system and start refrigerant recovery mode, specifically, control air conditioning system and start refrigerant recovery mode, include: controlling a first valve arranged between the heat storage module and the second end of the heat exchanger of the indoor unit to be opened, and controlling a second valve arranged between the second end of the four-way valve and the first end of the heat storage module to be closed, wherein at the moment, the refrigerant in the heat storage module flows out to pass through the heat exchanger of the indoor unit and returns to a circulating system of the air conditioner; after the preset time, the refrigerant recovery is expected to be completed, and the first valve is controlled to be closed.
According to the control method of the air conditioning system, whether the four-way valve is powered on or not is controlled according to the heating mode which needs to enter the air conditioning system, so that the internal conduction state of the four-way valve is controlled, the flowing direction of the refrigerant in the heat storage module is controlled, heat storage and heating circulation are respectively realized, when the air conditioning is defrosted, the liquid refrigerant discharged by the heat exchanger of the indoor unit is heated through the heat storage module and is converted into a gas state to return to the compressor, so that the heating circulation is realized, when the heat exchanger of the outdoor unit is defrosted, uninterrupted heating can be realized, and the comfort of the air conditioning system is.
Example 5
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the above-described control method.
Example 6
The embodiment provides an air conditioning device which comprises the air conditioning system for uninterrupted heating or a control method of the air conditioning system for uninterrupted heating.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (15)
1. An air conditioning system comprising: compressor, indoor set heat exchanger and off-premises station heat exchanger, the exhaust end of compressor with the first end intercommunication of indoor set heat exchanger, its characterized in that, the system still includes: a four-way valve and a heat storage module;
the first end of the four-way valve is communicated with the exhaust end of the compressor, the second end of the four-way valve is communicated with the first end of the heat storage module, the third end of the four-way valve is communicated with the air suction end of the compressor, the fourth end of the four-way valve is communicated with the first end of the outdoor unit heat exchanger and used for obtaining electricity when the air conditioning system needs to enter a normal heating mode, the first end of the four-way valve is communicated with the second end of the four-way valve, and the fourth end of; when the air conditioning system needs to enter a defrosting and heating mode, the air conditioning system loses power, the first end of the air conditioning system is communicated with the fourth end, and the second end of the air conditioning system is communicated with the third end;
the second end of the heat storage module is respectively communicated with the second end of the indoor unit heat exchanger and the second end of the outdoor unit heat exchanger; the heat storage module is used for conducting in the direction from the second end of the heat storage module to the second end of the outdoor unit heat exchanger to store heat when the air conditioning system needs to enter a normal heating mode; and when the air conditioning system needs to enter a defrosting and heating mode, the heat storage module is communicated in the direction from the second end of the indoor unit heat exchanger to the second end of the heat storage module, so that heating circulation in the defrosting and heating mode is realized.
2. The system of claim 1, wherein the heat storage module is further configured to conduct in a direction from the second end of the outdoor heat exchanger to the second end of the heat storage module when the air conditioning system needs to enter the defrosting and heating mode, so that the heat storage module heats a liquid refrigerant discharged after defrosting of the outdoor heat exchanger, thereby implementing a defrosting cycle in the defrosting and heating mode.
3. The system of claim 1, further comprising:
and the gas-liquid separator is arranged between the third end of the four-way valve and the air suction end of the compressor and is used for separating gaseous refrigerants and liquid refrigerants.
4. The system of claim 3, further comprising:
and the heating device is arranged between the gas-liquid separator and the air suction end of the compressor and is used for heating the liquid refrigerant separated by the gas-liquid separator so that the liquid refrigerant returns to the compressor after being converted into a gas state.
5. The system of claim 1, further comprising:
and the first valve is arranged between the second end of the heat storage module and the second end of the indoor unit heat exchanger, is opened when the air conditioning system needs to enter a normal heating mode or a defrosting heating mode, and is closed when the air conditioner runs in a refrigerating mode.
6. The system of claim 1, further comprising:
and the second valve is arranged between the second end of the four-way valve and the heat storage module and is used for being opened when the air conditioning system needs to enter a normal heating mode or a defrosting heating mode and being closed when the air conditioner runs in a refrigerating mode.
7. A control method of an air conditioning system applied to the air conditioning system according to any one of claims 1 to 6, characterized by comprising:
judging whether the air conditioning system needs to enter a normal heating mode or a defrosting heating mode;
and controlling the power-on state of the four-way valve according to the heating mode which needs to be entered by the air conditioning system, and further controlling the conduction direction between the heat storage module and the outdoor unit heat exchanger or the conduction direction between the heat storage module and the indoor unit heat exchanger.
8. The method of claim 7, wherein controlling the conduction direction between the heat storage module and the heat exchanger of the outdoor unit by controlling the energization state of the four-way valve according to a heating mode to be entered by the air conditioning system comprises:
and if the air conditioning system needs to enter a normal heating mode, controlling the four-way valve to be electrified to enable the first end and the second end of the four-way valve to be communicated, and enabling the fourth end and the third end to be communicated, so as to control the second end of the heat storage module to be communicated with the second end of the outdoor unit heat exchanger.
9. The method of claim 7, wherein controlling the conduction direction between the heat storage module and the heat exchanger of the indoor unit by controlling the power-on state of a four-way valve according to the heating mode to be entered by the air conditioning system comprises:
and if the air conditioning system needs to enter a defrosting and heating mode, controlling the four-way valve to lose power so as to control the conduction of the second end and the third end of the four-way valve and further control the conduction of the second end of the heat exchanger of the indoor unit to the second end of the heat storage module.
10. The method of claim 7, wherein while controlling the direction communication from the second end of the indoor unit heat exchanger to the second end of the thermal storage module, the method further comprises: and controlling the direction conduction from the second end of the outdoor heat exchanger to the second end of the heat storage module.
11. The method of claim 10, wherein controlling the direction from the second end of the outdoor heat exchanger to the second end of the heat storage module comprises:
and controlling the conduction of the first end and the fourth end of the four-way valve, so that the second end of the outdoor unit heat exchanger is conducted to the second end of the heat storage module.
12. The method of claim 7, further comprising:
judging an operation mode to be entered by an air conditioning system and a last operation mode, wherein the operation modes comprise: the refrigerator comprises a refrigerating mode and a heating mode, wherein the heating mode comprises a normal heating mode and a defrosting heating mode;
and if the operation mode to be entered by the air conditioning system is a refrigerating mode and the last operation mode is a heating mode, controlling the air conditioning system to start a refrigerant recovery mode.
13. The method of claim 12, wherein controlling the air conditioning system to initiate a refrigerant recovery mode comprises:
controlling the first valve to be opened and the second valve to be closed;
after a preset time, controlling the first valve to be closed;
the first valve is arranged between the second end of the heat storage module and the second end of the indoor unit heat exchanger, and the second valve is arranged between the second end of the four-way valve and the first end of the heat storage module.
14. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method of any one of claims 7 to 13.
15. An air conditioning apparatus comprising the system of any of claims 1 to 6, or the method of any of claims 7 to 13.
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| CN201911013492.7A CN110645745A (en) | 2019-10-23 | 2019-10-23 | Air conditioner capable of continuously heating and control method thereof |
| CN2019110134927 | 2019-10-23 |
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| CN202020214742.5U Active CN211876449U (en) | 2019-10-23 | 2020-02-26 | Circulating system capable of continuously heating and air conditioner |
| CN202010121492.5A Withdrawn CN111102773A (en) | 2019-10-23 | 2020-02-26 | Circulating system capable of continuously heating, control method thereof and air conditioner |
| CN202020213405.4U Active CN211739588U (en) | 2019-10-23 | 2020-02-26 | Air conditioner capable of improving heat exchange performance |
| CN202010120879.9A Pending CN111102771A (en) | 2019-10-23 | 2020-02-26 | Air conditioning system and control method thereof |
| CN202010120896.2A Pending CN111121353A (en) | 2019-10-23 | 2020-02-26 | Air conditioner capable of improving heat exchange performance and control method thereof |
| CN202010121467.7A Active CN111102772B (en) | 2019-10-23 | 2020-02-26 | Oil return system for low-temperature continuous heating, oil return control method and air conditioning equipment |
| CN202010120876.5A Pending CN111102770A (en) | 2019-10-23 | 2020-02-26 | Air conditioning system capable of continuously heating |
| CN202010121494.4A Active CN111102774B (en) | 2019-10-23 | 2020-02-26 | Uninterrupted heating air conditioning system, control method thereof and air conditioning equipment |
| CN202020214766.0U Active CN211739592U (en) | 2019-10-23 | 2020-02-26 | Air conditioning system capable of continuously heating |
| CN202020214741.0U Active CN211739591U (en) | 2019-10-23 | 2020-02-26 | Air conditioning system and air conditioning equipment that incessant heats |
| CN202020213424.7U Active CN211739589U (en) | 2019-10-23 | 2020-02-26 | Air conditioning system |
| CN202020214004.0U Active CN211739590U (en) | 2019-10-23 | 2020-02-26 | Oil return system for low-temperature continuous heating and air conditioning equipment |
| CN202010318282.5A Pending CN111288694A (en) | 2019-10-23 | 2020-04-21 | Air conditioner capable of continuously heating and control method thereof |
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| CN202020214742.5U Active CN211876449U (en) | 2019-10-23 | 2020-02-26 | Circulating system capable of continuously heating and air conditioner |
| CN202010121492.5A Withdrawn CN111102773A (en) | 2019-10-23 | 2020-02-26 | Circulating system capable of continuously heating, control method thereof and air conditioner |
| CN202020213405.4U Active CN211739588U (en) | 2019-10-23 | 2020-02-26 | Air conditioner capable of improving heat exchange performance |
| CN202010120879.9A Pending CN111102771A (en) | 2019-10-23 | 2020-02-26 | Air conditioning system and control method thereof |
| CN202010120896.2A Pending CN111121353A (en) | 2019-10-23 | 2020-02-26 | Air conditioner capable of improving heat exchange performance and control method thereof |
| CN202010121467.7A Active CN111102772B (en) | 2019-10-23 | 2020-02-26 | Oil return system for low-temperature continuous heating, oil return control method and air conditioning equipment |
| CN202010120876.5A Pending CN111102770A (en) | 2019-10-23 | 2020-02-26 | Air conditioning system capable of continuously heating |
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| CN202020214741.0U Active CN211739591U (en) | 2019-10-23 | 2020-02-26 | Air conditioning system and air conditioning equipment that incessant heats |
| CN202020213424.7U Active CN211739589U (en) | 2019-10-23 | 2020-02-26 | Air conditioning system |
| CN202020214004.0U Active CN211739590U (en) | 2019-10-23 | 2020-02-26 | Oil return system for low-temperature continuous heating and air conditioning equipment |
| CN202010318282.5A Pending CN111288694A (en) | 2019-10-23 | 2020-04-21 | Air conditioner capable of continuously heating and control method thereof |
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| CN110645746B (en) * | 2019-10-23 | 2024-03-19 | 珠海格力电器股份有限公司 | Continuous heating control system and method and air conditioning equipment |
| CN110645745A (en) * | 2019-10-23 | 2020-01-03 | 珠海格力电器股份有限公司 | Air conditioner capable of continuously heating and control method thereof |
| CN110836417A (en) * | 2019-11-18 | 2020-02-25 | 珠海格力电器股份有限公司 | Air conditioner and air conditioner control method |
| CN111306852A (en) * | 2020-02-26 | 2020-06-19 | 珠海格力电器股份有限公司 | Air conditioning system for preventing heat exchanger from frosting and control method thereof |
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| CN111102774B (en) | 2024-03-08 |
| CN111102771A (en) | 2020-05-05 |
| CN211739592U (en) | 2020-10-23 |
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| CN111102772B (en) | 2024-03-08 |
| WO2021169542A1 (en) | 2021-09-02 |
| CN111102773A (en) | 2020-05-05 |
| CN211739589U (en) | 2020-10-23 |
| CN211739588U (en) | 2020-10-23 |
| CN110645745A (en) | 2020-01-03 |
| WO2021169541A1 (en) | 2021-09-02 |
| CN111102770A (en) | 2020-05-05 |
| CN211739591U (en) | 2020-10-23 |
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