CN110779165A - Defrosting system, control method and air conditioner - Google Patents
Defrosting system, control method and air conditioner Download PDFInfo
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- CN110779165A CN110779165A CN201911121370.XA CN201911121370A CN110779165A CN 110779165 A CN110779165 A CN 110779165A CN 201911121370 A CN201911121370 A CN 201911121370A CN 110779165 A CN110779165 A CN 110779165A
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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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- Combustion & Propulsion (AREA)
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- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a defrosting system, a control method and an air conditioner, and relates to the technical field of air conditioners. The defrosting system comprises a compressor, an evaporator, an electronic expansion valve, a condenser group, an energy storage device, a gas-liquid separator and a control valve group; and the second exhaust pipe of the energy storage device is connected with the air inlet pipe of the condenser group, and the control valve group is arranged between the second exhaust pipe of the energy storage device and the air inlet pipe of the condenser group. According to the defrosting system, the control method and the air conditioner, the flow direction of the refrigerant from the electronic expansion valve and the energy storage device to the condenser group is controlled by controlling the opening and closing of the corresponding valves of the control valve group, so that the heating and defrosting processes of the condenser group are controlled, the defrosting process of the condenser group is completed on the premise that heating is not stopped, and compared with the condition that the heating effect is influenced by stopping defrosting, the comfort of an indoor environment is effectively improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting system, a control method and an air conditioner.
Background
When the air conditioner operates in heating in winter, because the outdoor unit frosts, channels among the fins are blocked, the heat exchange capacity is reduced, the evaporation temperature is reduced, the energy efficiency ratio is reduced, and finally the operation condition of the air conditioner is worsened, so that the air conditioner needs to be defrosted in time to avoid the condition that the air conditioner cannot normally operate.
The existing air conditioner mostly adopts the shutdown defrosting mode, and the refrigerant flow direction is converted under the shutdown defrosting mode, and the high-temperature and high-pressure refrigerant output by the compressor is conveyed to the frosted heat exchanger of the outdoor unit, so that the frost layer of the outdoor unit is melted, however, the shutdown defrosting needs to be carried out under the shutdown state, the indoor comfort is reduced, and the overall performance of the air conditioner is not promoted.
Disclosure of Invention
The invention solves the problem that the existing air conditioner stops to defrost so as to reduce the indoor comfort.
In order to solve the above problems, the present invention provides a defrosting system, which comprises a compressor, an evaporator, an electronic expansion valve, a condenser set, an energy storage device, a gas-liquid separator and a control valve set; the utility model discloses a condenser, including compressor, condenser, air inlet pipe, air outlet pipe, air inlet pipe, energy memory, air inlet pipe, condenser, control valve group, the blast pipe of compressor with the intake pipe of evaporator reaches energy memory's first intake-tube connection, the blast pipe of evaporator with electronic expansion valve's intake-tube connection, energy memory's first blast pipe with electronic expansion valve's intake-tube connection, electronic expansion valve's blast pipe with energy memory's second intake-tube reaches condenser group's intake-tube connection, energy memory's second blast pipe with be equipped with between condenser group's the intake-tube control valve group, condenser group with gas liquid separator connects, gas liquid separator's blast pipe with the intake.
According to the defrosting system, the flow direction of the refrigerant from the electronic expansion valve and the energy storage device to the condenser group is controlled by controlling the opening and closing of the corresponding valves of the control valve group, so that the heating and defrosting processes of the condenser group are controlled, the defrosting process of the condenser group is completed on the premise that heating is not stopped, and compared with the condition that the heating effect is influenced by stopping defrosting, the comfort of an indoor environment is effectively improved.
Preferably, the condenser group includes first condenser and second condenser, first condenser with second condenser parallel connection, first condenser with the intake pipe of second condenser respectively with electronic expansion valve's blast pipe is connected, just first condenser with the intake pipe of second condenser respectively with energy memory's second blast pipe is connected.
According to the defrosting system, the first condenser and the second condenser are alternately defrosted by controlling the corresponding inlets and outlets of the first three-way valve, the second three-way valve and the third three-way valve, so that the defrosting process of the condenser group is completed on the premise that heating is not stopped, and the comfort of the indoor environment is effectively improved.
Preferably, the control valve group includes a first three-way valve, a second three-way valve and a third three-way valve, the first three-way valve is located the energy storage device with the connecting pipeline of the condenser group, the second three-way valve is located the electronic expansion valve with the connecting pipeline of the first condenser, the third three-way valve is located the electronic expansion valve with the connecting pipeline of the second condenser.
According to the defrosting system, the control valve group comprises the first three-way valve, the second three-way valve and the third three-way valve, and by switching the valve switches of the corresponding three-way valves, the refrigerants in the electronic expansion valve and the energy storage device can respectively flow into the condenser in the heating mode and the defrosting mode, so that the defrosting process of the condenser group is completed on the premise that heating is not stopped, and the comfort of the indoor environment is effectively improved.
Preferably, an air inlet of the first three-way valve is connected with a second air outlet pipe of the energy storage device, a first air outlet of the first three-way valve is connected with a first air inlet of the second three-way valve, and a second air outlet of the first three-way valve is connected with a first air inlet of the third three-way valve; the exhaust pipe of the electronic expansion valve is connected with the second air inlet of the second three-way valve and the second air inlet of the third three-way valve, the exhaust port of the second three-way valve is connected with the air inlet pipe of the first condenser, and the exhaust port of the third three-way valve is connected with the air inlet pipe of the second condenser.
According to the defrosting system, the first condenser and the second condenser are alternately defrosted by controlling the corresponding inlets and outlets of the first three-way valve, the second three-way valve and the third three-way valve, so that the defrosting process of the condenser group is completed on the premise that heating is not stopped, and the comfort of the indoor environment is effectively improved.
Preferably, the energy storage device further comprises a third air inlet pipe and a third air outlet pipe, the third air inlet pipe is connected with the air outlet pipe of the condenser group, and the third air outlet pipe is connected with the air inlet pipe of the gas-liquid separator.
According to the defrosting system, the third air inlet pipe is connected with the exhaust pipe of the condenser group, and the third exhaust pipe is connected with the air inlet pipe of the gas-liquid separator, so that the refrigerant from the condenser group enters the energy storage device to be heated into a gas state and then enters the compressor, and the liquid impact phenomenon of the compressor is effectively prevented.
Preferably, the energy storage device is a plate heat exchanger or a heat storage device.
According to the defrosting system, energy is stored through the energy storage device consisting of the plate heat exchanger or the heat storage device, so that the condenser group is effectively heated, and the influence of normal operation of the air conditioner caused by frosting is prevented.
The invention also provides a defrosting control method, which is applied to any defrosting system and comprises the following steps: detecting an operation mode of an air conditioner; controlling the conduction state of the control valve group according to the operation mode; and controlling the flow direction of a refrigerant from the electronic expansion valve and the energy storage device to the condenser group according to the conduction state of the control valve group.
Preferably, the controlling the conduction state of the control valve group according to the operation mode specifically includes: controlling an air inlet of a first three-way valve in the control valve group to be closed when it is determined that a first condenser and a second condenser of the condenser group are operated in a heating mode; when it is determined that the first condenser is in a defrosting mode and the second condenser is in a heating mode, controlling a second exhaust port of a first three-way valve in the control valve group to be closed, a second air inlet of the second three-way valve to be closed and a first air inlet of the third three-way valve to be closed; when it is determined that the first condenser is in a heating mode and the second condenser is in a defrost mode, controlling a first exhaust port of a first three-way valve in the control valve bank to be closed and a first air inlet of the second three-way valve to be closed and a second air inlet of the third three-way valve to be closed.
The defrosting control method has the same advantages as any one of the defrosting systems compared with the prior art, and is not repeated herein.
The present invention also provides an air conditioner including a computer-readable storage medium storing a computer program and a processor, wherein when the computer program is read and executed by the processor, the defrosting control method according to any one of the above-described embodiments is implemented.
The air conditioner has the same advantages as any one of the defrosting systems compared with the prior art, and the detailed description is omitted here.
The present invention also provides a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the defrost control method of any of the above.
The computer readable storage medium has the same advantages as any of the above-described defrost systems over the prior art, and is not described herein again.
Drawings
FIG. 1 is a schematic diagram of a defrost control system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an energy storage device according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a control valve assembly according to an embodiment of the present invention.
Description of reference numerals:
1-compressor, 2-evaporator, 3-electronic expansion valve, 4-condenser bank, 41-first condenser, 42-second condenser, 5-energy storage device, 51-first intake pipe, 52-first exhaust pipe, 53-second intake pipe, 54-second exhaust pipe, 55-third intake pipe, 56-third exhaust pipe, 6-gas-liquid separator, 7-control valve bank, 71-first three-way valve, 711-intake port of first three-way valve, 712-first exhaust port of first three-way valve, 713-second exhaust port of first three-way valve, 72-second three-way valve, 721-first intake port of second three-way valve, 722-second intake port of second three-way valve, 723-exhaust port of second three-way valve, 73-third three-way valve, 731-a first inlet port of the third three-way valve, 732-a second inlet port of the third three-way valve, 733-an outlet port of the third three-way valve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that, in the description of the present invention, the inlet and outlet pipes of the device are named as inlet pipe, outlet pipe, etc. according to the common naming rules and conventions in the field, but the names of the inlet pipe, the outlet pipe, etc. are not limited to passing through gas, but may also pass through liquid.
As shown in fig. 1, an embodiment of the present invention provides a defrosting system, which includes a compressor 1, an evaporator 2, an electronic expansion valve 3, a condenser group 4, an energy storage device 5, a gas-liquid separator 6, and a control valve group 7; the exhaust pipe of the compressor 1 is connected with the air inlet pipe of the evaporator 2 and the first air inlet pipe 51 of the energy storage device 5, the exhaust pipe of the evaporator 2 is connected with the air inlet pipe of the electronic expansion valve 3, the first exhaust pipe 52 of the energy storage device 5 is connected with the air inlet pipe of the electronic expansion valve 3, the exhaust pipe of the electronic expansion valve 3 is connected with the second air inlet pipe 53 of the energy storage device 5 and the air inlet pipe of the condenser group 4, the second exhaust pipe 54 of the energy storage device 5 is connected with the air inlet pipe of the condenser group 4, the control valve group 7 is arranged between the condenser group 4 and the gas-liquid separator 6, and the exhaust pipe of the gas-liquid separator 6 is connected with the air inlet pipe.
Specifically, as shown in fig. 1, the defrosting system includes a compressor 1, an evaporator 2, an electronic expansion valve 3, a condenser bank 4, an energy storage device 5, a gas-liquid separator 6 and a control valve bank 7, in the present embodiment, the condenser bank 4 includes a first condenser 41 and a second condenser 42, and the control valve bank 7 includes a first three-way valve 71, a second three-way valve 72 and a third three-way valve 73, but it is understood that the number and arrangement of the respective sub-elements of the condenser bank 4 and the control valve bank 7 are not limited to the above form; wherein, the exhaust pipe of the compressor 1 is connected with the intake pipe of the evaporator 2 and the first intake pipe 51 of the energy storage device 5, in the heating cycle, one part of high-temperature and high-pressure gas from the compressor 1 passes through the evaporator 2 to exchange heat with the indoor space, the other part of the high-temperature and high-pressure gas passes through the energy storage device 5 to store heat in the energy storage device 5, the gas from the evaporator 2 is converged with the gas from the energy storage device 5 and enters the electronic expansion valve 3 to become low-temperature and low-pressure gas, and one part of the low-temperature and low-pressure gas enters the energy storage device 5 to be heated and heated, taking the example that the condenser set 4 includes the first condenser 41 and the second condenser 42, the heated gas passes through the first three-way valve 71 in sequence, for the case that the first condenser 41 needs defrosting, the gas enters the second three-way valve 72 and enters the first condenser 41 to heat and defrost the first condenser 41; for the case that the second condenser 42 needs defrosting, the gas enters the third three-way valve 73 again, enters the second condenser 42 to heat and defrost the second condenser 42, returns to the compressor 1 from the gas-liquid separator 6 to complete the defrosting cycle, and the other part of the low-temperature and low-pressure gas enters the second condenser 42 through the third three-way valve 73 and returns to the compressor 1 from the gas-liquid separator 6 to complete the heating cycle.
In this embodiment, the refrigerant flow direction to the condenser group by electronic expansion valve and energy memory is controlled through opening and closing the corresponding valve of control valve group, and then control the heating and the defrosting process of condenser group for under the prerequisite that the heating does not stop, accomplish the defrosting process of condenser group, compare in shut down the defrosting and can influence the effect of heating, effectively improved indoor environment's travelling comfort.
Preferably, the condenser group 4 includes a first condenser 41 and a second condenser 42, the first condenser 41 is connected to the second condenser 42 in parallel, the first condenser 41 is connected to the intake pipe of the second condenser 42, and the intake pipe of the first condenser 41 is connected to the exhaust pipe of the electronic expansion valve 3, and the intake pipe of the second condenser 42 is connected to the second exhaust pipe 54 of the energy storage device 5.
Specifically, as shown in fig. 1, the condenser group 4 includes a first condenser 41 and a second condenser 42 connected in parallel, intake pipes of the first condenser 41 and the second condenser 42 are connected to an exhaust pipe of the electronic expansion valve 3, intake pipes of the first condenser 41 and the second condenser 42 are connected to a second exhaust pipe 54 of the energy storage device 5, and the first condenser 41 and the second condenser 42 are in a heating mode or a defrosting mode by controlling opening and closing of valves of the control valve group 7, so that a heating process and a defrosting process are completed.
It can be understood that, besides the case that the condenser group 4 includes the first condenser 41 and the second condenser 42, the number of the condensers may be increased, and accordingly, the number of the three-way valves at the refrigerant inlets of the condensers is also increased, and the first three-way valve 71 is replaced by another flow dividing assembly, for example, in the case of three condensers, the first three-way valve 71 is replaced by a flow dividing assembly with one inlet and three outlets, and the heat in the energy storage device is brought into the condenser to be defrosted by switching the valves of the flow dividing assembly, so as to complete the defrosting process.
The defrosting system of this embodiment through the corresponding switch of importing and exporting of control first three-way valve, second three-way valve and third three-way valve for first condenser and second condenser defrost in turn, under the prerequisite that the heating does not stop, accomplish the defrosting process of condenser group, effectively improved indoor environment's travelling comfort.
Preferably, the control valve assembly 7 includes a first three-way valve 71, a second three-way valve 72 and a third three-way valve 73, the first three-way valve 71 is located on the connection pipeline between the energy storage device 5 and the condenser set 4, the second three-way valve 72 is located on the connection pipeline between the electronic expansion valve 3 and the first condenser 41, and the third three-way valve 73 is located on the connection pipeline between the electronic expansion valve 3 and the second condenser 42.
Specifically, as shown in fig. 1 and fig. 3, the control valve assembly 7 includes a first three-way valve 71, a second three-way valve 72, and a third three-way valve 73, where the first three-way valve 71 is located on a connection pipeline between the energy storage device 5 and the condenser bank 4, the second three-way valve 72 is located on a connection pipeline between the electronic expansion valve 3 and the first condenser 41, and the third three-way valve 73 is located on a connection pipeline between the electronic expansion valve 3 and the second condenser 42, and by switching valve switches of the corresponding three-way valves, refrigerants in the electronic expansion valve 3 and the energy storage device 5 can respectively flow into condensers in the heating mode and the defrosting mode, and a defrosting process of the condenser bank is completed without stopping heating.
The defrosting system comprises a control valve group, a first three-way valve, a second three-way valve and a third three-way valve, wherein the control valve group comprises the first three-way valve, the second three-way valve and the third three-way valve, and a valve switch for switching the corresponding three-way valves is used for enabling refrigerants in the electronic expansion valve and the energy storage device to respectively flow into a condenser in a heating mode and a defrosting mode.
Preferably, the inlet 711 of the first three-way valve 71 is connected to the second exhaust pipe 54 of the energy storage device 5, the first exhaust port 712 of the first three-way valve 71 is connected to the first inlet 721 of the second three-way valve 72, and the second exhaust port 713 of the first three-way valve 71 is connected to the first inlet 731 of the third three-way valve 73; an exhaust pipe of the electronic expansion valve 3 is connected to the second inlet 722 of the second three-way valve 72 and the second inlet 732 of the third three-way valve 73, an exhaust port 723 of the second three-way valve 72 is connected to an intake pipe of the first condenser 41, and an exhaust port 733 of the third three-way valve 73 is connected to an intake pipe of the second condenser 42.
Specifically, as shown in fig. 1 and 3 in conjunction, the intake port 711 of the first three-way valve 71 is connected to the second exhaust pipe 54 of the energy storage device 5, the first exhaust port 712 of the first three-way valve 71 is connected to the first intake port 721 of the second three-way valve 72, and the second exhaust port 713 of the first three-way valve 71 is connected to the first intake port 731 of the third three-way valve 73; an exhaust pipe of the electronic expansion valve 3 is connected to the second intake port 722 of the second three-way valve 72 and the second intake port 732 of the third three-way valve 73, an exhaust port 723 of the second three-way valve 72 is connected to an intake pipe of the first condenser 41, and an exhaust port 733 of the third three-way valve 73 is connected to an intake pipe of the second condenser 42.
In an actual control process, when the first condenser 41 needs defrosting, only the second exhaust port 713 of the first three-way valve 71 is closed, only the second air inlet 722 of the second three-way valve 72 is closed, only the first air inlet 731 of the third three-way valve 73 is closed, and gas exhausted from the energy storage device 5 enters the second three-way valve 72 and then enters the first condenser 41 to heat and defrost the first condenser 41; for the case where the second condenser 42 needs defrosting, only the first exhaust port 712 of the first three-way valve 71 is closed, only the first intake port 721 of the second three-way valve 72 is closed, only the second intake port 732 of the third three-way valve 73 is closed, and the gas discharged from the energy storage device 5 enters the third three-way valve 73 and then enters the second condenser 42 to heat and defrost the second condenser 42, and then returns from the gas-liquid separator 6 to the compressor 1, completing the defrosting cycle.
The defrosting system of this embodiment through the corresponding switch of importing and exporting of control first three-way valve, second three-way valve and third three-way valve for first condenser and second condenser defrost in turn, under the prerequisite that the heating does not stop, accomplish the defrosting process of condenser group, effectively improved indoor environment's travelling comfort.
Preferably, the energy storage device 5 further includes a third air inlet pipe 55 and a third air outlet pipe 56, the third air inlet pipe 55 is connected with the air outlet pipe of the condenser group 4, and the third air outlet pipe 56 is connected with the air inlet pipe of the gas-liquid separator 6.
Specifically, as shown in fig. 1, the third air inlet pipe 55 is connected to the air outlet pipe of the condenser group 4, and the third air outlet pipe 56 is connected to the air inlet pipe of the gas-liquid separator 6, because the refrigerant coming out of the condenser group 4 may be in a gas-liquid two-phase state, and directly enters the compressor 1 to cause liquid impact on the compressor 1, the third air inlet pipe 55 is connected to the air outlet pipe of the condenser group 4, and the third air outlet pipe 56 is connected to the air inlet pipe of the gas-liquid separator 6, so that the refrigerant coming out of the condenser group 4 enters the energy storage device 5 to be heated into a gas state and then enters the compressor 1, and the liquid impact phenomenon on the compressor is effectively prevented.
The defrosting system is connected with the exhaust pipe of the condenser group through the third air inlet pipe, and the third exhaust pipe is connected with the air inlet pipe of the gas-liquid separator, so that the refrigerant coming out of the condenser group enters the energy storage device to be heated into a gas state and then enters the compressor, and the phenomenon of liquid impact of the compressor is effectively prevented.
Preferably, the energy storage device 5 is a plate heat exchanger or a heat storage device.
Specifically, in this embodiment, energy storage device 5 is plate heat exchanger or heat accumulation device, wherein, the real-time heat transfer of plate heat exchanger, only opens when high temperature high-pressure gas passes through, and the heat accumulation device is heat accumulation all the time, and the heat of compressor 1 no longer passes through the heat accumulation device after holding full heat, waits to store up the heat and uses up, accepts the heat of compressor 1 once more, though plate heat exchanger is different with the working process of heat accumulation device, but finally can both realize the energy storage purpose, heats the refrigerant before getting into condenser group 4.
The defrosting system stores energy through the energy storage device formed by the plate heat exchanger or the heat storage device, realizes effective heating of the condenser group, and prevents frosting from causing normal operation of the air conditioner.
Another embodiment of the present invention provides a defrosting control method, which is applied to any one of the above defrosting systems, and includes the following steps: detecting an operation mode of an air conditioner; controlling the conduction state of the control valve group 7 according to the operation mode; and controlling the flow direction of the refrigerant from the electronic expansion valve 3 and the energy storage device 5 to the condenser group 4 according to the conducting state of the control valve group 7.
Specifically, the defrosting control method comprises the following steps: detecting an operation mode of an air conditioner; controlling the conduction state of the control valve group 7 according to the operation mode; and controlling the flow direction of the refrigerant from the electronic expansion valve 3 and the energy storage device 5 to the condenser group 4 according to the conducting state of the control valve group 7. Because the refrigerants of the electronic expansion valve 3 and the energy storage device 5 respectively flow to the first condenser 41 and the second condenser 42, the first condenser 41 and the second condenser 42 alternately defrost, the defrosting process of the condenser group 4 is completed on the premise that the heating is not stopped, and the comfort of the indoor environment is effectively improved.
The operation mode of the air conditioner specifically refers to the operation state of each condenser in the condenser group 4, and different condensers can operate in the heating mode or the defrosting mode, so that the operation state of each condenser is actually detected in the step of detecting the operation mode of the air conditioner, and the operation state of the whole air conditioner is directly reflected.
According to the defrosting control method, the flow direction of the refrigerant from the electronic expansion valve and the energy storage device to the condenser bank is controlled according to the conduction state of the control valve, so that the first condenser and the second condenser are alternately defrosted, the defrosting process of the condenser bank is completed on the premise that heating is not stopped, and the comfort of the indoor environment is effectively improved.
Preferably, the controlling the conduction state of the control valve group 7 according to the operation mode specifically includes: when the first condenser 41 and the second condenser 42 of the condenser group 4 are determined to be operated in the heating mode, controlling the air inlet 711 of the first three-way valve 71 in the control valve group 7 to be closed, blocking the energy storage device 5 from the condenser group 4, and conducting the electronic expansion valve 3 with the condenser group 4; when it is determined that the first condenser 41 is in the defrosting mode and the second condenser 42 is in the heating mode, controlling the second exhaust port 713 of the first three-way valve 71 in the control valve set 7 to be closed, the second intake port 722 of the second three-way valve 72 to be closed, and the first intake port 731 of the third three-way valve 73 to be closed, so that the first condenser 41 is connected with the energy storage device 5, the second condenser 42 is connected with the electronic expansion valve 3, and the refrigerant heated by the energy storage device 5 enters the first condenser 41, so that the first condenser 41 operates in the defrosting mode, the refrigerant not heated in the electronic expansion valve 3 enters the second condenser 42, and the second condenser 42 operates in the heating mode; when it is determined that the first condenser 41 is in the heating mode and the second condenser 42 is in the defrosting mode, the first exhaust port 712 of the first three-way valve 71 in the control valve set 7 is controlled to be closed, the first air inlet 721 of the second three-way valve 72 is controlled to be closed, and the second air inlet 732 of the third three-way valve 73 is controlled to be closed, so that the first condenser 41 is connected with the electronic expansion valve 3, the second condenser 42 is connected with the energy storage device 5, and the refrigerant heated by the energy storage device 5 enters the second condenser 42, so that the second condenser 42 operates in the defrosting mode, while the refrigerant not heated in the electronic expansion valve 3 enters the first condenser 41, and the first condenser 41 operates in the heating mode.
Specifically, the above description includes three cases: firstly, in a normal heating operation mode, the air inlet 711 of the first three-way valve 71 is closed, the refrigerant does not enter the energy storage device 5, and the condenser group 4 operates according to the heating operation mode; secondly, the first condenser 41 enters a defrosting mode, and gas exhausted from the energy storage device 5 enters the second three-way valve 72 and then enters the first condenser 41 to heat and defrost the first condenser 41; thirdly, the second condenser 42 enters the defrosting mode, the gas discharged from the energy storage device 5 enters the third three-way valve 73, enters the second condenser 42 again, heats and defrosts the second condenser 42, and returns to the compressor 1 from the gas-liquid separator 6, thereby completing the defrosting cycle.
According to the defrosting control method, the first condenser and the second condenser are alternately defrosted by controlling the corresponding inlet and outlet switches of the first three-way valve, the second three-way valve and the third three-way valve, the defrosting process of the condenser group is completed on the premise that heating is not stopped, and the comfort of the indoor environment is effectively improved.
Another embodiment of the present invention further provides an air conditioner including a computer-readable storage medium storing a computer program and a processor, wherein when the computer program is read and executed by the processor, the defrosting control method according to any one of the above embodiments is implemented.
Another embodiment of the present invention provides a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the defrost control method described in any one of the above.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The defrosting system is characterized by comprising a compressor (1), an evaporator (2), an electronic expansion valve (3), a condenser group (4), an energy storage device (5), a gas-liquid separator (6) and a control valve group (7);
the exhaust pipe of the compressor (1) is connected with the air inlet pipe of the evaporator (2) and the first air inlet pipe (51) of the energy storage device (5), the exhaust pipe of the evaporator (2) is connected with the air inlet pipe of the electronic expansion valve (3), the first exhaust pipe (52) of the energy storage device (5) is connected with the air inlet pipe of the electronic expansion valve (3), the exhaust pipe of the electronic expansion valve (3) is connected with the second air inlet pipe (53) of the energy storage device (5) and the air inlet pipe of the condenser group (4), the second exhaust pipe (54) of the energy storage device (5) is connected with the air inlet pipe of the condenser group (4), the control valve group (7) is arranged between the second exhaust pipe (54) of the energy storage device (5) and the air inlet pipe of the condenser group (4), and the condenser group (4) is connected with the gas-liquid separator (6), and the exhaust pipe of the gas-liquid separator (6) is connected with the air inlet pipe of the compressor (1).
2. Defrost system according to claim 1, characterized in that the condenser bank (4) comprises a first condenser (41) and a second condenser (42), the first condenser (41) and the second condenser (42) are connected in parallel, the inlet ducts of the first condenser (41) and the second condenser (42) are connected with the outlet duct of the electronic expansion valve (3), respectively, and the inlet ducts of the first condenser (41) and the second condenser (42) are connected with the second outlet duct (54) of the energy storage device (5), respectively.
3. Defrost system according to claim 2, characterized in that the control valve group (7) comprises a first three-way valve (71), a second three-way valve (72) and a third three-way valve (73), the first three-way valve (71) being located on the connection line of the energy storage device (5) and the condenser bank (4), the second three-way valve (72) being located on the connection line of the electronic expansion valve (3) and the first condenser (41), the third three-way valve (73) being located on the connection line of the electronic expansion valve (3) and the second condenser (42).
4. Defrost system according to claim 3, characterized in that the inlet (711) of the first three-way valve (71) is connected to the second exhaust duct (54) of the energy storage means (5), that the first exhaust (712) of the first three-way valve (71) is connected to the first inlet (721) of the second three-way valve (72), and that the second exhaust (713) of the first three-way valve (71) is connected to the first inlet (731) of the third three-way valve (73);
an exhaust pipe of the electronic expansion valve (3) is connected with a second air inlet (722) of the second three-way valve (72) and a second air inlet (732) of the third three-way valve (73), an exhaust port (723) of the second three-way valve (72) is connected with an air inlet pipe of the first condenser (41), and an exhaust port (733) of the third three-way valve (73) is connected with an air inlet pipe of the second condenser (42).
5. Defrost system according to claim 1, characterized in that the energy storage means (5) further comprises a third inlet duct (55) and a third vent duct (56), the third inlet duct (55) being connected with the vent ducts of the condenser bank (4), the third vent duct (56) being connected with the inlet duct of the gas-liquid separator (6).
6. Defrost system according to any of the claims 1-5, characterized in that the energy storage means (5) is a plate heat exchanger or a heat storage means.
7. A defrosting control method applied to the defrosting system according to any one of claims 1 to 6, comprising the steps of:
detecting an operation mode of an air conditioner;
controlling the conduction state of a control valve group (7) according to the operation mode;
and controlling the flow direction of the refrigerant from the electronic expansion valve (3) and the energy storage device (5) to the condenser group (4) according to the conduction state of the control valve group (7).
8. Defrost control method according to claim 7, wherein said controlling the conducting state of the control valve group (7) according to said operation mode comprises:
controlling an air inlet (711) of a first three-way valve (71) in the control valve group (7) to be closed when determining that a first condenser (41) and a second condenser (42) of the condenser group (4) are operated in a heating mode;
when it is determined that the first condenser (41) is in a defrosting mode and the second condenser (42) is in a heating mode, controlling a second exhaust port (713) of a first three-way valve (71) in the control valve group (7) to be closed and a second intake port (722) of the second three-way valve (72) to be closed and a first intake port (731) of the third three-way valve (73) to be closed;
controlling a first exhaust port (712) of a first three-way valve (71) in the control valve group (7) to be closed and a first intake port (721) of the second three-way valve (72) to be closed and a second intake port (732) of the third three-way valve (73) to be closed when it is determined that the first condenser (41) is in a heating mode and the second condenser (42) is in a defrosting mode.
9. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, wherein when the computer program is read and executed by the processor, the defrosting control method according to claim 7 or 8 is implemented.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the defrost control method according to claim 7 or 8.
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| CN201911121370.XA CN110779165A (en) | 2019-11-15 | 2019-11-15 | Defrosting system, control method and air conditioner |
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| CN201911121370.XA CN110779165A (en) | 2019-11-15 | 2019-11-15 | Defrosting system, control method and air conditioner |
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