CN110793096A - Air conditioning unit and control method and control device thereof - Google Patents
Air conditioning unit and control method and control device thereof Download PDFInfo
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- CN110793096A CN110793096A CN201911209900.6A CN201911209900A CN110793096A CN 110793096 A CN110793096 A CN 110793096A CN 201911209900 A CN201911209900 A CN 201911209900A CN 110793096 A CN110793096 A CN 110793096A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 289
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000005057 refrigeration Methods 0.000 claims abstract description 6
- 238000010257 thawing Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 6
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located 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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate 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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/42—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger characterised by the use of the condensate, e.g. for enhanced cooling
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
An air conditioning unit and a control method and a control device thereof are disclosed, the air conditioning unit comprises an indoor unit and an outdoor unit, the indoor unit is provided with a condensed water outlet, the outdoor unit comprises an outdoor heat exchanger and a compressor, the air conditioning unit also comprises a waterway system, the waterway system comprises a main water tank, a compressor water tank capable of exchanging heat with the compressor and a water heat exchanger capable of exchanging heat with the outdoor heat exchanger; the main water tank is divided into two paths through a four-way valve to switch water, one path is connected to the first end of the compressor water tank through a first valve, and the second end of the compressor water tank is connected to the first end of the water heat exchanger; and the other branch is divided into two branches behind the second valve, wherein one branch is connected to the second end of the water heat exchanger, and the other branch is connected to a condensed water outlet of the indoor unit through the first valve. The invention can solve the problems of overhigh temperature of the refrigeration mode compressor, frosting of the outdoor heat exchanger in the heating mode and the like, and has the effect of improving the heat exchange efficiency.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning unit and a control method and a control device thereof.
Background
When the air conditioner operates in a refrigerating mode in summer, the outdoor temperature is high, the temperature of the compressor is too high, and even the phenomenon of trip protection and the like can occur. The existing air conditioner generally protects the compressor by reducing the running frequency of the compressor, but the method is easy to cause the phenomena of insufficient indoor cold quantity and temperature fluctuation. When the existing air conditioner frosts outdoors, the four-way valve switches a refrigeration mode to defrost the outdoor heat exchanger, so that the outdoor heating is realized, and the defrosting effect is achieved; however, the indoor unit does not heat up in the defrosting process, so that the indoor temperature is unstable.
Disclosure of Invention
The invention solves the problems that the temperature of the compressor in the cooling mode is overhigh, the outdoor heat exchanger frosts in the heating mode and the like.
In order to solve the above problems, as an aspect of the present invention, an air conditioning unit is provided, including an indoor unit and an outdoor unit, the indoor unit having a condensed water outlet, the outdoor unit including an outdoor heat exchanger and a compressor, wherein the air conditioning unit further includes a waterway system, the waterway system including a main water tank, a compressor water tank capable of exchanging heat with the compressor, and a water heat exchanger capable of exchanging heat with the outdoor heat exchanger; the main water tank is divided into two paths through a four-way valve to switch water, one path is connected to the first end of the compressor water tank through a fourth valve, and the second end of the compressor water tank is connected to the first end of the water heat exchanger; and the other branch is divided into two branches behind the second valve, wherein one branch is connected to the second end of the water heat exchanger, and the other branch is connected to a condensed water outlet of the indoor unit through the first valve.
Therefore, the water path system is added on the existing air conditioning system, and the temperature of the compressor is reduced by utilizing condensed water of an indoor unit or water of a main water tank during refrigeration by controlling the operation of the water path, so that the compressor keeps high-frequency operation, the condensation temperature of the water heat exchanger can be reduced, the condensation heat exchange quantity is improved, and the heat exchange efficiency of the outdoor heat exchanger is improved; when heating, the heat that the compressor produced is absorbed to the water of total water tank, and the condenser of flowing through emits the heat, realizes the defrosting that does not shut down, can improve heat exchange efficiency, and indoor temperature fluctuation is less, promotes human comfort level.
In some embodiments of the present invention, the total water tank is formed between the double-layered hollow shells by providing a wind-isolating vertical plate having the double-layered hollow shells in the outdoor unit; or the main water tank is arranged between the outdoor fan blade and the outdoor heat exchanger, and the air conditioner has the advantages of simple structure and convenience in installation.
In some embodiments of the present invention, the compressor water tank is formed by disposing the annular cavity at the periphery of the compressor, so as to ensure a large heat exchange area between the compressor water tank and the compressor, which is beneficial to cooling the compressor.
In some embodiments of the invention, the water heat exchanger comprises a condensate pipe coiled on the outdoor heat exchanger; the condensate pipe is fixed on the outdoor heat exchanger through a limiting buckle. Therefore, the water heat exchanger can have a larger heat exchange area with the outdoor heat exchanger, and the defrosting effect can be improved.
In some embodiments of the present invention, a water outlet communicated with the outside is further provided at the bottom of the main water tank and/or the compressor water tank, and a valve is provided at the water outlet for replacing water in the main water tank or the compressor water tank or adjusting the water amount of the waterway system.
As another aspect of the present invention, there is provided a control method of an air conditioning unit as described above, including controlling a water pump, a four-way valve, and a valve of the air conditioning unit to perform the following steps: in a refrigeration mode, according to the exhaust temperature of the compressor, condensed water of an indoor unit or water of a main water tank sequentially passes through a water heat exchanger and a compressor water tank to respectively cool an outdoor heat exchanger and the compressor; in the heating mode, according to the temperature of an outer disc of the outdoor heat exchanger and the water temperature of the compressor water tank, the water in the main water tank sequentially passes through the compressor water tank and the water heat exchanger to defrost the outdoor heat exchanger.
Based on the control method, the compressor is cooled by selecting a proper water path to operate according to the exhaust temperature of the compressor in the refrigeration mode, so that the heat exchange efficiency is improved; in the heating mode, the compressor can be properly cooled while defrosting without stopping through water path operation according to the temperature of an outer disc of the outdoor heat exchanger and the temperature of a water tank of the compressor.
In some embodiments of the present invention, the step of cooling the outdoor heat exchanger and the compressor by passing the condensed water of the indoor unit or the water of the total water tank through the water heat exchanger and the compressor water tank in sequence according to the discharge temperature of the compressor includes: when the difference value between the exhaust temperature of the compressor and the exhaust set temperature is larger than a first threshold value, the water in the total water tank sequentially passes through the water heat exchanger and the compressor water tank to respectively cool the outdoor heat exchanger and the compressor; when the difference value between the exhaust temperature of the compressor and the exhaust set temperature is smaller than a second threshold value, respectively cooling the outdoor heat exchanger and the compressor by sequentially passing condensed water of the indoor unit through the water heat exchanger and the compressor water tank, wherein the second threshold value is smaller than the first threshold value; and when the difference value between the exhaust temperature of the compressor and the exhaust set temperature is smaller than or equal to a first threshold value and larger than or equal to a second threshold value, controlling to keep the former state unchanged.
In some embodiments of the present invention, the defrosting the outdoor heat exchanger by passing the water in the main tank through the compressor water tank and the water heat exchanger in sequence according to the temperature of the outer plate of the outdoor heat exchanger and the temperature of the water in the compressor water tank includes: when the water temperature of the compressor water tank is more than or equal to the set water temperature of the compressor water tank, or when the difference value between the outer plate temperature of the outdoor heat exchanger and the set outer plate temperature is less than or equal to a third threshold value, the water in the main water tank sequentially passes through the compressor water tank and the water heat exchanger to defrost the outdoor heat exchanger; when the water temperature of the compressor water tank is lower than the set water temperature of the compressor water tank and the difference value between the outer plate temperature of the outdoor heat exchanger and the set outer plate temperature is greater than or equal to a fourth threshold value, defrosting is not carried out, wherein the fourth threshold value is greater than the third threshold value; and when the difference value between the temperature of the outer disc of the outdoor heat exchanger and the set temperature of the outer disc is greater than a third threshold value and less than a fourth threshold value, controlling to keep the previous state unchanged.
Based on the embodiment, in the practical application process, reasonable set temperature and corresponding threshold values can be selected according to experience, so that the water path operation mode can be reasonably selected according to actual needs when the air conditioning unit operates, and the overall stability and reliability of the system are ensured.
As still another aspect of the present invention, there is provided a control apparatus of an air conditioning unit, including a controller for controlling a water pump, a four-way valve, and a valve of the air conditioning unit to perform the control method as described above.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an air conditioning unit according to an embodiment of the present invention;
fig. 2 is a schematic top view of an outdoor unit structure of an air conditioning unit according to an embodiment of the present invention;
fig. 3 is a schematic rear view of an outdoor unit structure of an air conditioning unit according to an embodiment of the present invention;
FIG. 4 is a control flow chart of the cooling mode of the air conditioning unit according to the embodiment of the invention;
fig. 5 is a control flow chart of the heating mode of the air conditioning unit according to the embodiment of the invention.
In the above drawings, the reference numerals have the following meanings:
1-indoor machine, 2-first valve, 3-condenser water pipe,
4-a second valve, 5-a water inlet, 6-a third valve,
7. 14-a water outlet, 8-a main water tank, 9-a water pump,
10-four-way valve, 11-fourth valve, 12-compressor,
13-fifth valve, 15-compressor water tank, 16-outdoor heat exchanger,
17-water heat exchanger, 18-limiting buckle, and 19-outer machine fan blade.
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.
Example 1
As a first exemplary embodiment of the present invention, an air conditioning unit is provided. Fig. 1 is a schematic diagram of an overall structure of an air conditioning unit according to an embodiment of the present invention, and please refer to fig. 1, the air conditioning unit is additionally provided with a water channel system on a conventional air conditioning system, the conventional air conditioning system generally includes an indoor unit 1 and an outdoor unit, the indoor unit has a condensed water outlet K5, the outdoor unit includes an outdoor heat exchanger 16 and a compressor 12, the water channel system includes a total water tank 8, a compressor water tank 15 capable of exchanging heat with the compressor 12, and a water heat exchanger 17 capable of exchanging heat with the outdoor heat exchanger 16; the main water tank 8 is divided into two paths by the four-way valve 10 to switch water, one path is connected to a first end K1 of the compressor water tank 15 through the fourth valve 11, and a second end K2 of the compressor water tank 15 is connected to a first end K3 of the water heat exchanger 17; the other branch is divided into two branches after the second valve 4, wherein one branch is connected to the second end K4 of the water heat exchanger 17, and the other branch is connected to the condensed water outlet K5 of the indoor unit 1 through the first valve 2.
In the present embodiment, the four-way valve 10, as a component capable of replacing the fluid flow channel, has four ports, namely, a terminal C, a terminal D, a terminal S and a terminal E, and taking the example that the terminal D and the terminal E are communicated when being energized and the terminal D and the terminal C are communicated when not being energized, different water path running directions can be realized in the cooling mode and the heating mode respectively by controlling whether the current is energized or not.
Specifically, when the four-way valve 10 is not powered on, condensed water generated by the indoor unit or water of the total water tank sequentially passes through the water heat exchanger 17 and the compressor water tank 15, the temperature of the compressor is as high as 80-100 ℃ due to the temperature of the condenser being about 40-50 ℃, and the temperature of the condensed water generated by the indoor unit or water of the total water tank is still not higher than 50 ℃ after passing through the water heat exchanger, so that the temperature of the compressor can be continuously reduced, the condensing temperature in the refrigerating process can be reduced, and the heat exchange efficiency is improved; the water may be discharged directly from the system after passing through the compressor water tank 15 or returned to the main water tank 8. Of course, the outdoor heat exchanger 16 and the compressor 12 may be cooled by the water in the main tank in other non-heating modes.
When the four-way valve 10 is powered on, water in the main water tank sequentially passes through the compressor water tank 15 and the water heat exchanger 17, the heat of the compressor can be absorbed after passing through the compressor water tank 15, the heat is released at the water heat exchanger 17 to defrost the outdoor heat exchanger 16, then the water returns to the main water tank, the defrosting without stopping is realized, the heat exchange efficiency is also improved, the indoor temperature fluctuation is small, and the human body comfort level is improved.
Fig. 2 is a schematic top view of an outdoor unit structure of an air conditioning unit according to an embodiment of the present invention, and fig. 3 is a schematic rear view of the outdoor unit structure according to the embodiment of the present invention. In the present embodiment, referring to fig. 2 and 3, the waterway system is integrally disposed on the outdoor unit.
Particularly, through set up the wind riser that separates that has double-deck ghost in the off-premises station, form total water tank 8 between this double-deck ghost, only need carry out the institutional transformation to separating the wind riser from this and can form total water tank 8, simple structure, simple to operate. In other embodiments, the header tank 8 may also be disposed between the outdoor fan blade 19 and the outdoor heat exchanger 16, or other convenient locations.
In the present embodiment, an annular cavity is provided at the outer periphery of the compressor 12 to form the compressor water tank 15, so that a large heat exchange area is provided between the compressor 12 and the compressor water tank 15. The water heat exchanger 17 comprises a condensate pipe coiled on the outdoor heat exchanger 16, and it can be understood that the condensate pipe is coiled to help increase the heat exchange area, and the condensate pipe is fixed on the outdoor heat exchanger 16 through a limiting buckle 18 to exchange heat with the outdoor heat exchanger 16.
In this embodiment, the bottom of the main water tank 8 is further provided with a water outlet 7 communicated with the outside, and the water outlet 7 is provided with a third valve 6, and/or the bottom of the compressor water tank 15 is further provided with a water outlet 14 communicated with the outside, and the water outlet 14 is provided with a fifth valve 13. The water in the water path system is replaced or the amount of water is adjusted through the water discharge ports 7 and 14.
In this embodiment, the total water tank 8 is further provided with a water inlet 5 for supplying water to the water channel system by itself for circulation, and the water in the water channel system includes the condensed water of the indoor unit 1 in addition to the self-supplied water. A water pump 9 is also arranged between the main water tank 8 and the four-way valve 10, and the main water tank 8 is pressurized by the water pump 9 and then discharges water through the four-way valve 10.
Example 2
Based on the air conditioning unit of embodiment 1, this embodiment provides a control method of an air conditioning unit. FIG. 4 is a control flow chart of the cooling mode of the air conditioning unit according to the embodiment of the invention; fig. 5 is a control flow chart of the heating mode of the air conditioning unit according to the embodiment of the invention.
Referring to fig. 4 and 5, the control method includes controlling a water pump, a four-way valve, a valve, etc. of the air conditioning unit to perform the following steps: in the cooling mode, according to the exhaust temperature of the compressor 12, the condensed water of the indoor unit 1 or the water of the total water tank 8 passes through the water heat exchanger 17 and the compressor water tank 15 in sequence to respectively cool the outdoor heat exchanger 16 and the compressor 12; in the heating mode, the water in the main tank 8 is sequentially passed through the compressor water tank 15 and the water heat exchanger 27 to defrost the outdoor heat exchanger, depending on the outer pan temperature of the outdoor heat exchanger 16 and the water temperature of the compressor water tank 15.
Referring to fig. 4, in the cooling mode, according to the discharge temperature of the compressor 12, the step of cooling the outdoor heat exchanger 16 and the compressor 12 by passing the condensed water of the indoor unit 1 or the water of the total water tank 8 through the water heat exchanger 17 and the compressor water tank 15 in sequence includes:
step S1: when the discharge temperature T of the compressorExhaust of gasesAnd a set exhaust gas temperature TExhaust gas settingIs greater than a first threshold value deltat1When the water in the main water tank 5 passes through the water heat exchanger 17 and the compressor water tank 15 in sequence to cool the outdoor heat exchanger and the compressor respectively;
wherein the exhaust gas is set to a temperature TExhaust gas settingPreferably 100 ℃, according to experience, when the exhaust temperature exceeds 100 ℃, the overall temperature of the compressor is higher, and the risk of trip burning exists. Delta T1The value range is preferably 2-5 ℃ as an empirical value.
Referring to fig. 1, in order to make the water in the main water tank 5 sequentially pass through the water heat exchanger 17 and the compressor water tank 15, the water pump 9 needs to be turned on, the four-way valve 10 is not energized, the C port and the D port are communicated, the second valve 4 and the fourth valve 11 are opened, and the first valve 2, the third valve 6 and the fifth valve 13 are closed.
Step S2: when the discharge temperature T of the compressor 12Exhaust of gasesAnd a set exhaust gas temperature TExhaust gas settingIs less than a second threshold value deltat2At this time, the condensed water of the indoor unit 1 passes through the water heat exchanger 17 and the compressor water tank 15 in sequence to cool the outdoor heat exchanger 16 and the compressor 12, respectively, wherein the second threshold value Δ T2Less than a first threshold value Δ T1(ii) a Wherein Δ T2The value range is preferably-5-0 ℃ as an empirical value.
Referring to fig. 1, in order to cool the outdoor heat exchanger 16 and the compressor 12 by passing the condensed water of the indoor unit 1 through the water heat exchanger 17 and the compressor water tank 15 in sequence, the water pump 9 needs to be turned off, the four-way valve 10 is not powered, the end C is communicated with the end D, the end E is communicated with the end S, the first valve 2 and the fourth valve 11 are opened, the second valve 4, the third valve 6 and the fifth valve 13 are closed, and finally the condensed water is returned to the header water tank 8 through the end E and the end S of the four-way valve 10. In other embodiments, the fourth valve 11 may be closed, and the fifth valve 13 may be opened, so that the condensed water directly flows out of the system.
Step S3: when the compressor 12 isExhaust temperature TExhaust of gasesAnd a set exhaust gas temperature TExhaust gas settingIs less than or equal to a first threshold value DeltaT1And is greater than or equal to a second threshold value Delta T2When so, control keeps the previous state unchanged.
In this step, "control to keep the previous state unchanged" means to keep the states of the current water pump, the four-way valve, and the first to fifth valves unchanged.
Further, the present embodiment further includes step S4: when the system is operating at one state1Thereafter, the exhaust gas temperature is re-detected to perform the control process of steps S1-S3, and so on. Where Δ t1The range of values is preferably 30s to 90s, which is an empirical value.
Referring to fig. 5, in the heating mode, the step of defrosting the outdoor heat exchanger by passing the water in the main water tank 8 through the compressor water tank 15 and the water heat exchanger 27 in sequence according to the temperature of the outer plate of the outdoor heat exchanger 16 and the temperature of the water in the compressor water tank 15 includes:
step S1': when the water temperature T of the compressor water tankCompressor water temperatureMore than or equal to the set water temperature T of the compressor water tankCompressor set water temperatureWhen the defrosting device is used, water in the main water tank sequentially passes through the compressor water tank and the water heat exchanger to defrost the outdoor heat exchanger;
compressor water tank set water temperature TCompressor set water temperatureThe optimized temperature is 50-60 ℃, the overheating of the compressor can be avoided, the defrosting is carried out after the water tank of the compressor reaches a certain temperature, and the defrosting efficiency and the heat exchange efficiency can be improved.
Referring to fig. 1, in order to make the water in the main water tank 8 sequentially pass through the compressor water tank 15 and the water heat exchanger 27, the water pump 9 is turned on, the four-way valve is energized to communicate the end D with the end E, the end C with the end S, the second valve 4 and the fourth valve 11 are turned on, and the first valve 2, the third valve 6 and the fifth valve 13 are turned off.
Step S2': if the water temperature T of the compressor water tankCompressor water temperatureLess than the set water temperature T of the compressor water tankCompressor set water temperatureWhen the temperature of the outer plate of the outdoor heat exchanger is TOuter plateSet temperature T with outer discOuter disc settingIs less than or equal to a third threshold value DeltaT3When the defrosting operation is performed, the water in the main water tank 8 passes through the compressor water tank 15 and the water heat exchanger 17 in sequence to defrost the outdoor heat exchanger 16;
wherein the outer disk is set with a temperature TOuter disc settingPreferably-3 ℃ to 0 ℃, more preferably-1 ℃, according to experience, the outdoor heat exchanger below 0 ℃ can generate frost, the temperature of the outer plate is too low, and the frost layer is thick, so that the heat exchange is influenced. Delta T3Is an empirical value, and the value range is preferably-3 ℃ to 0 ℃.
Similar to step S1', in this step, the water pump 9 is turned on, the four-way valve is energized to communicate the end D with the end E and the end C with the end S, the second valve 4 and the fourth valve 11 are opened, and the first valve 2, the third valve 6 and the fifth valve 13 are closed.
Step S3': when the water temperature T of the compressor water tank 15Compressor water temperatureIs less than the set water temperature T of the compressor water tank 15Compressor set water temperatureAnd the outer plate temperature T of the outdoor heat exchanger 16Outer plateSet temperature T with outer discOuter disc settingIs greater than or equal to a fourth threshold value DeltaT4If so, not defrosting, wherein the fourth threshold is greater than the third threshold; preferably,. DELTA.T4Is an empirical value with a value range of 2-5 ℃.
Referring to fig. 1, when defrosting is not performed, the water pump, the first to fifth valves are turned off, and the four-way valve is not energized.
Step S4': when the temperature T of the outer plate of the outdoor heat exchanger 16Outer disc settingSet temperature T with outer discOuter disc settingIs greater than a third threshold value deltat3And is less than a fourth threshold value DeltaT4When so, control keeps the previous state unchanged.
Further, the present embodiment further includes step S5': when the system is operating at one state2Then, T is re-detectedOuter plateAnd TCompressor water temperatureSo as to perform the control processes of steps S1 'to S4', and the process is repeated in a cycle. Where Δ t2The range of values is preferably 30s to 90s, which is an empirical value.
Secondly, this embodiment also provides a control device of an air conditioning unit, which includes a controller for controlling the water pump, the four-way valve and the valve of the air conditioning unit to execute the control method.
Furthermore, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the control method of the air conditioning unit as described in the above embodiments. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
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. An air conditioning unit comprises an indoor unit and an outdoor unit, wherein the indoor unit is provided with a condensate water outlet, and the outdoor unit comprises an outdoor heat exchanger and a compressor;
the main water tank is divided into two paths through a four-way valve to switch water, one path is connected to the first end of the compressor water tank through a fourth valve, and the second end of the compressor water tank is connected to the first end of the water heat exchanger; and the other branch is divided into two branches behind the second valve, wherein one branch is connected to the second end of the water heat exchanger, and the other branch is connected to a condensed water outlet of the indoor unit through the first valve.
2. The air conditioning assembly as set forth in claim 1, wherein said header tank is formed between double-layered hollow shells by providing a wind-blocking vertical plate having double-layered hollow shells in said outdoor unit.
3. The air conditioning assembly as set forth in claim 1, wherein said header tank is disposed between the outdoor fan blades and the outdoor heat exchanger.
4. The air conditioning assembly as set forth in claim 1 wherein said compressor water tank is formed by providing an annular cavity at the periphery of said compressor.
5. The air conditioning assembly as set forth in claim 1 wherein said water heat exchanger includes a condensate pipe coiled on said outdoor heat exchanger; the condensed water pipe is fixed on the outdoor heat exchanger through a limiting buckle.
6. Air conditioning assembly according to claim 1, wherein a drain opening communicating with the outside is further provided at the bottom of the main and/or compressor water tank, said drain opening being provided with a valve.
7. A control method for an air conditioning unit according to any of claims 1 to 6, characterized in that it comprises controlling the water pump, the four-way valve and the valves of the air conditioning unit to perform the following steps:
in a refrigeration mode, according to the exhaust temperature of the compressor, condensed water of an indoor unit or water of a main water tank sequentially passes through a water heat exchanger and a compressor water tank to respectively cool an outdoor heat exchanger and the compressor;
in the heating mode, according to the temperature of an outer disc of the outdoor heat exchanger and the water temperature of the compressor water tank, the water in the main water tank sequentially passes through the compressor water tank and the water heat exchanger to defrost the outdoor heat exchanger.
8. The control method according to claim 7, wherein the step of cooling the outdoor heat exchanger and the compressor by passing the condensed water of the indoor unit or the water of the total water tank through the water heat exchanger and the compressor water tank in sequence according to the discharge temperature of the compressor comprises:
when the difference value between the exhaust temperature of the compressor and the exhaust set temperature is larger than a first threshold value, the water in the total water tank sequentially passes through the water heat exchanger and the compressor water tank to respectively cool the outdoor heat exchanger and the compressor;
when the difference value between the exhaust temperature of the compressor and the exhaust set temperature is smaller than a second threshold value, respectively cooling the outdoor heat exchanger and the compressor by sequentially passing condensed water of the indoor unit through the water heat exchanger and the compressor water tank, wherein the second threshold value is smaller than the first threshold value;
and when the difference value between the exhaust temperature of the compressor and the exhaust set temperature is smaller than or equal to a first threshold value and larger than or equal to a second threshold value, controlling to keep the former state unchanged.
9. The control method according to claim 7, wherein the step of defrosting the outdoor heat exchanger by passing the water of the total tank through the compressor tank and the water heat exchanger in sequence according to the temperature of the outer plate of the outdoor heat exchanger and the temperature of the water of the compressor tank comprises:
when the water temperature of the compressor water tank is more than or equal to the set water temperature of the compressor water tank, or when the difference value between the outer plate temperature of the outdoor heat exchanger and the set outer plate temperature is less than or equal to a third threshold value, the water in the main water tank sequentially passes through the compressor water tank and the water heat exchanger to defrost the outdoor heat exchanger;
when the water temperature of the compressor water tank is lower than the set water temperature of the compressor water tank and the difference value between the outer plate temperature of the outdoor heat exchanger and the set outer plate temperature is greater than or equal to a fourth threshold value, defrosting is not carried out, wherein the fourth threshold value is greater than the third threshold value;
and when the difference value between the temperature of the outer disc of the outdoor heat exchanger and the set temperature of the outer disc is greater than a third threshold value and less than a fourth threshold value, controlling to keep the previous state unchanged.
10. A control apparatus of an air conditioning unit, characterized by comprising a controller for controlling a water pump, a four-way valve, and a valve of the air conditioning unit to perform the control method according to any one of claims 7 to 9.
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| CN115247907A (en) * | 2021-04-26 | 2022-10-28 | 苏州英维克温控技术有限公司 | Air conditioning unit and air conditioner |
| WO2024012034A1 (en) * | 2022-07-14 | 2024-01-18 | 青岛海尔空调器有限总公司 | Control method and apparatus for air conditioner, and electronic device, storage medium and air conditioner |
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| CN110793096B (en) | 2024-07-23 |
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