CN114963345A - Multi-system air conditioner outdoor unit - Google Patents
Multi-system air conditioner outdoor unit Download PDFInfo
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- CN114963345A CN114963345A CN202210636943.8A CN202210636943A CN114963345A CN 114963345 A CN114963345 A CN 114963345A CN 202210636943 A CN202210636943 A CN 202210636943A CN 114963345 A CN114963345 A CN 114963345A
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- 238000004378 air conditioning Methods 0.000 claims abstract description 44
- 230000017525 heat dissipation Effects 0.000 claims abstract description 27
- 206010010904 Convulsion Diseases 0.000 claims description 3
- 230000036461 convulsion Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 description 7
- 230000032683 aging Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 239000011087 paperboard Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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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
- 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
- F24F11/46—Improving electric energy efficiency or saving
-
- 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
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a multi-system air conditioning outdoor unit which comprises a fan, a first heat exchanger and a second heat exchanger, wherein the first heat exchanger and the second heat exchanger correspond to two air conditioning systems respectively, an air outlet side of the first heat exchanger and an air outlet side of the second heat exchanger are arranged oppositely, an air cavity is formed between the air outlet side of the first heat exchanger and the air outlet side of the second heat exchanger, and the fan is used for drawing air from the air cavity outwards. In the multi-system air conditioner, when the heat exchange quantity of different air conditioning systems is unbalanced, the air valves corresponding to the different air conditioning systems can be adjusted to open at different angles, so that the purpose of adjusting different heat dissipation quantities is achieved, and the air quantity of the outdoor unit can be reasonably distributed. In summary, the multi-system outdoor unit of an air conditioner can effectively solve the problem of large energy consumption of the multi-system outdoor unit of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-system air conditioner outdoor unit.
Background
The large-cooling-capacity-section machine room precision air conditioner outdoor unit in the current market derives a double-system outdoor unit for meeting different customer requirements. In order to achieve better heat dissipation, the outdoor unit is usually placed in a hollow space such as a roof and the like, and the air flow is better. At present, the following problems mainly exist:
first, the outdoor unit condenser is easily fouled and aged. No matter whether the air conditioner is opened, the outdoor unit condenser is exposed to the air for a long time and blows the sun, and along with the time lapse, the condenser can accumulate a large amount of impurities and the condenser corrodes the ageing condition and also aggravates, and then influences the heat dissipation and increases the consumption, shortens unit life.
And secondly, the heat exchange quantity of the double-system outdoor unit is in a non-optimal state. When only one system of the double systems works, the outdoor unit has invalid air volume, the two systems use the same fan system for heat exchange, and when only one system works, the condenser which does not need heat exchange also carries out air volume flow, so that the energy efficiency of the system is not favorably improved. When the heat exchange amount of the two systems is unbalanced, the outdoor unit still equally distributes the air intake amount of the two systems, so that the systems cannot exert better performance.
Thirdly, when the outdoor unit is operated, impurities such as foam, paper boards and plastic bags may be absorbed to block the condenser, so that the heat exchange amount of the system is reduced, and the power consumption is increased.
Fourthly, when the unit is started in the extreme low-temperature environment, the outdoor unit is placed in a position with a good ventilation environment, and the starting high-low pressure difference cannot be established for a long time, so that the starting failure of the unit is caused.
In summary, how to effectively solve the problem of large energy consumption of the multi-system outdoor unit of the air conditioner is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a multi-system outdoor unit of an air conditioner, which can effectively solve the problem of large energy consumption of the multi-system outdoor unit of the air conditioner.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a multi-system air condensing units, includes fan, first heat exchanger and second heat exchanger, first heat exchanger with the second heat exchanger is corresponding to two air conditioning system respectively, the air-out side of first heat exchanger with the air-out side of second heat exchanger sets up relatively and forms the wind chamber between, the fan is used for following the wind chamber is toward outer convulsions, its characterized in that, first blast gate has been arranged to the air inlet side of first heat exchanger, the second blast gate has been arranged to the air inlet side of second heat exchanger, first blast gate with the second blast gate can the independent control switching degree.
Preferably, a controller is also included; when the first heat exchanger and the second heat exchanger simultaneously generate heat exchange demands, the controller controls the first air valve and the second air valve to be opened and closed according to set opening and closing conditions, and controls the fan to be controlled according to a larger value of the rotating speed requirements of a system where the first heat exchanger is located and a system where the second heat exchanger is located; the controller controls the first air valve and the second air valve to be fully opened when the first heat exchanger and the second heat exchanger generate the same heat exchange requirement; when the heat dissipation requirement of the first heat exchanger is greater than the heat dissipation requirement of the second heat exchanger, the controller controls the first air valve to be opened fully, and the opening angle of the second air valve is b (Q) 2 /Q 1 ) Beta is set forth; when the heat dissipation requirement of the second heat exchanger is greater than the heat dissipation requirement of the first heat exchanger, the controller controls the second air valve to be opened fully, and the opening angle of the first air valve is b (Q) 1 /Q 2 ) Beta is set forth; wherein b is a full open angle, Q 1 The heat exchange quantity Q of the air conditioning system corresponding to the first heat exchanger 2 And the heat exchange quantity of the air conditioning system corresponding to the second heat exchanger is represented by beta, wherein the beta represents an angle compensation coefficient.
Preferably, the heat dissipation device further comprises a controller, and when the heat dissipation requirement of the first heat exchanger is greater than the heat dissipation requirement of the second heat exchanger, the controller controls the first air valve to be fully opened, and the opening angle of the second air valve is smaller than the full opening angle.
Preferably, the full open angle is 90 degrees.
Preferably, when the first heat exchanger needs to dissipate heat and the second heat exchanger stops dissipating heat, the controller controls the heat dissipation device according to the following steps:
when the system pressure corresponding to the first heat exchanger is greater than the set value of the air opening valve, the first air valve is controlled to be completely opened,
when the system pressure corresponding to the first heat exchanger is larger than the set value of the starting pressure of the fan, the fan is controlled to be started,
when the system pressure corresponding to the first heat exchanger is larger than the full-speed pressure set value of the fan, controlling the full speed of the outdoor fan, and controlling the rotating speed of the fan to keep increasing linearly between the starting pressure set value of the fan and the full-speed pressure set value of the fan;
when the second heat exchanger needs to dissipate heat and the first heat exchanger stops dissipating heat, the controller controls the heat dissipation according to the following steps:
when the system pressure corresponding to the second heat exchanger is larger than the set value of the air opening valve, the second air valve is controlled to be completely opened,
when the system pressure corresponding to the second heat exchanger is larger than the set value of the starting pressure of the fan, the fan is controlled to be started,
and when the system pressure corresponding to the second heat exchanger is greater than the full-speed pressure set value of the fan, controlling the full speed of the fan, and controlling the rotating speed of the fan to keep increasing linearly between the fan starting pressure set value and the full-speed pressure set value of the fan. .
Preferably, when the first heat exchanger needs to dissipate heat and the second heat exchanger stops dissipating heat, the controller controls the heat dissipation device according to the following steps:
when the system pressure corresponding to the first heat exchanger is smaller than a difference value obtained by subtracting a first pressure return difference from the set value of the starting pressure of the fan, controlling the fan to stop;
and when the system pressure corresponding to the first heat exchanger is smaller than a difference value obtained by subtracting a second pressure return difference from the set value of the air opening valve, controlling the first air valve to close.
Preferably, a first pressure sensor is arranged at the first heat exchanger, and a second pressure sensor is arranged at the second heat exchanger.
Preferably, the controller controls the fan to be turned on before controlling the first air valve and the second air valve to be turned on when the ambient temperature is lower than a preset limit low temperature.
Preferably, the first air valve and the first heat exchanger are arranged in an overlapping manner in the thickness direction, and the second air valve and the second heat exchanger are arranged in an overlapping manner in the thickness direction; when the first air valve is fully opened, the valve of the first air valve is vertically arranged with the first heat exchanger; and when the second air valve is fully opened, the valve of the second air valve is perpendicular to the second heat exchanger.
Preferably, the heat exchanger comprises a rack, the first heat exchanger and the second heat exchanger are arranged in the rack in a V shape, and the fan is arranged at the opening of the air cavity.
When the multi-system air conditioner outdoor unit is used, the following advantages are mainly achieved: firstly, when multi-system air conditioner, when no heat transfer demand, it can make wherein first blast gate and second blast gate keep the closed state, because set up in the outside air inlet side of heat exchanger, so, can reduce outdoor impurity and attach to the condenser, avoided the long-term sunshine of heat exchanger directly to shine moreover, extension off-premises station heat exchanger corrodes ageing cycle.
Secondly, when only one system in the multi-system air conditioner has a heat exchange requirement, the outdoor unit only opens the air valve corresponding to the air conditioning system to exchange heat, and the air valves corresponding to the other air conditioning systems are closed, so that the ineffective air volume can be effectively reduced, the heat exchange capacity of the single system is increased, and the reduction of the energy consumption of the system is facilitated.
Thirdly, in the multi-system air conditioner, when the heat exchange quantity of different air conditioning systems is unbalanced, the purpose of adjusting different heat dissipation quantities can be achieved by adjusting the opening angles of the air valves corresponding to the different air conditioning systems, and the air quantity of the outdoor unit can be reasonably distributed.
Fourthly, when the outdoor unit is opened, if sundries such as foam, paperboards and plastic bags are absorbed, the sundries can block the air valve and cannot be completely attached to the heat exchanger, the outdoor unit can normally exchange heat, and the risk that the heat exchange variation leads to overhigh pressure is avoided.
And fifthly, when the outdoor unit is started at a low temperature limit, the air valve can be kept in a fully closed state, so that a high-low pressure difference can be conveniently established for the system, and the normal starting of the unit can be smoothly completed.
In summary, the multi-system outdoor unit of an air conditioner can effectively solve the problem of large energy consumption of the multi-system outdoor unit of the air conditioner.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an outdoor unit of a multi-system air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an air valve from closed, half open to full open according to an embodiment of the present invention;
fig. 3 is a schematic side view of an outdoor unit of a multi-system air conditioner according to an embodiment of the present invention during shutdown;
fig. 4 is a schematic view of another side structure of the multi-system outdoor unit of the air conditioner during shutdown according to the embodiment of the present invention;
fig. 5 is a schematic side view of a multi-system outdoor unit of an air conditioner according to an embodiment of the present invention when a single heat exchanger operates;
fig. 6 is a schematic view of another side structure of a multi-system outdoor unit of an air conditioner according to an embodiment of the present invention when a single heat exchanger operates;
fig. 7 is a schematic side view of an outdoor unit of a multi-system air conditioner in which two heat exchangers are operated according to an embodiment of the present invention;
fig. 8 is a schematic structural view of another side of the multi-system outdoor unit of an air conditioner when both heat exchangers are operating according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an outdoor unit of a multi-system air conditioner according to an embodiment of the present invention when the outdoor unit meets sundries.
The drawings are numbered as follows:
the air conditioner comprises a fan 1, a controller 2, a first air valve 3, a second air valve 4, a first heat exchanger 5, a first pressure sensor 6, a second pressure sensor 7, a second heat exchanger 8, a frame 9, a valve 10 and sundries 11.
Detailed Description
The embodiment of the invention discloses a multi-system air conditioner outdoor unit, which aims to effectively solve the problem of high energy consumption of the multi-system air conditioner outdoor unit.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
Referring to fig. 1 to 9, fig. 1 is a schematic structural diagram of an outdoor unit of a multi-system air conditioner according to an embodiment of the present invention; FIG. 2 is a schematic structural view of an air valve from closed, half open to full open according to an embodiment of the present invention; fig. 3 is a schematic view of a side structure of an outdoor unit of a multi-system air conditioner during shutdown according to an embodiment of the present invention; fig. 4 is a schematic view of another side structure of the multi-system outdoor unit of the air conditioner during shutdown according to the embodiment of the present invention; fig. 5 is a schematic side view of a multi-system outdoor unit of an air conditioner according to an embodiment of the present invention when a single heat exchanger operates; fig. 6 is a schematic view of another side structure of a multi-system outdoor unit of an air conditioner when a single heat exchanger operates according to an embodiment of the present invention; fig. 7 is a schematic side view of an outdoor unit of a multi-system air conditioner in which two heat exchangers are operated according to an embodiment of the present invention; fig. 8 is a schematic structural view of another side of the multi-system outdoor unit of an air conditioner when both heat exchangers are operating according to an embodiment of the present invention; fig. 9 is a schematic structural diagram of an outdoor unit of a multi-system air conditioner according to an embodiment of the present invention when the outdoor unit meets sundries.
In some embodiments, a multi-system air conditioner outdoor unit is provided. The multi-system air conditioning equipment mainly comprises a plurality of groups of air conditioning systems, for example, the dual-system air conditioning equipment comprises two groups of air conditioning systems. One group of air conditioning systems mainly comprises a compressor and a heat exchanger. The multi-system air conditioning equipment mainly comprises an indoor unit and an outdoor unit, and heat exchange is carried out between the indoor unit and the outdoor unit. In the multiple air conditioning systems, the outdoor heat exchangers of the air conditioning systems are arranged in the same outdoor unit.
As shown in fig. 1, the multi-system outdoor unit of an air conditioner includes a fan 1, a first heat exchanger 5, a second heat exchanger 8, a first damper 3, and a second damper 4.
Wherein the first heat exchanger 5 and the second heat exchanger 8 correspond to two air conditioning systems, respectively. That is, the heat exchangers in the two air conditioning systems, for convenience of the subsequent description, at least one of the heat exchangers in one of the air conditioning systems is referred to as a first heat exchanger 5, and at least one of the heat exchangers in the other air conditioning system is referred to as a second heat exchanger 8. The first heat exchanger 5 and the second heat exchanger 8 are plate heat exchangers, a channel for refrigerant circulation is formed in the first heat exchanger and the second heat exchanger, air flows into the heat exchanger from the inlet side of the heat exchanger and flows out from the outlet side of the heat exchanger, and when the heat exchanger is arranged in a penetrating mode, heat exchange is carried out between the air and the refrigerant in the channel through the channel wall. Specifically, the first heat exchanger 5 and the second heat exchanger 8 are both air-cooled heat exchangers.
Wherein the air-out side of first heat exchanger 5 and the air-out side of second heat exchanger 8 set up relatively and form the wind chamber between, fan 1 is used for following the wind chamber and outwards convulsions to make fan 1 can be used for the wind body of first heat exchanger 5 and second heat exchanger 8 department to flow with higher speed simultaneously. Wherein the air outlet side of the first heat exchanger 5 and the air outlet side of the second heat exchanger 8 are oppositely arranged, for example, oppositely arranged in parallel, and arranged at intervals, so that a cavity with a certain volume is formed between the air outlet side of the first heat exchanger and the air outlet side of the second heat exchanger, namely, the air cavity. When the fan is used, when the fan 1 draws air outwards from the air cavity, the air outlet side of the first heat exchanger 5 and the air outlet side of the second heat exchanger 8 can be simultaneously in an air drawing state. It should be noted that, in order to enable the fan 1 to have higher working efficiency, the air cavity may be sealed, for example, only the air outlet of the first heat exchanger 5, the air outlet of the second heat exchanger 8, and the air inlet of the fan 1 may be communicated with the air cavity.
Wherein, a first air valve 3 is arranged at the air inlet side of the first heat exchanger 5, and a second air valve 4 is arranged at the air inlet side of the second heat exchanger 8. The air inlet side of the heat exchanger is provided with the air valve, the air inlet volume can be adjusted through the opening and closing degree of the air valve, and the heat dissipation efficiency of the radiator can be adjusted by adjusting the air inlet volume. Wherein the opening degree of ventilation valve is big more, then the intake is big more, and is corresponding, and the radiating efficiency of radiator will be higher. When the air valve is closed, the radiator basically passes through the air valve or the passing air quantity is ignored, so that the air inlet quantity of the radiator can be controlled.
Wherein the first air valve 3 and the second air valve 4 can independently control the opening and closing degree, such as: when the first air valve 3 is closed, the second air valve 4 can be closed, half-opened or full-opened, correspondingly, when the second air valve 4 is closed, the first air valve 3 can also be selectively closed, half-opened or full-opened. Wherein the first air valve 3 and the second air valve 4 are both preferably electric air valves so as to facilitate electric control. It should be noted that, the specific structure of the air valve can be referred to the prior art, and is not described herein.
In some embodiments, when the multi-system outdoor unit of an air conditioner is applied, the following advantages are mainly provided:
firstly, at multisystem air conditioner, when no heat transfer demand, it can make wherein first blast gate 3 and second blast gate 4 keep off-state, because set up in the outside air-out side of heat exchanger, so, can reduce outdoor impurity and attach to the condenser on, avoided the long-term sunshine of heat exchanger to shine directly moreover, extension off-premises station heat exchanger corrodes ageing cycle.
Secondly, when only one system in the multi-system air conditioner has a heat exchange requirement, the outdoor unit only opens the air valve corresponding to the air conditioning system to exchange heat, and the air valves corresponding to the other air conditioning systems are closed, so that the ineffective air volume can be effectively reduced, the heat exchange capacity of the single system is increased, and the reduction of the energy consumption of the system is facilitated.
Thirdly, in the multi-system air conditioner, when the heat exchange quantity of different air conditioning systems is unbalanced, the purpose of adjusting different heat dissipation quantities can be achieved by adjusting the opening angles of the air valves corresponding to the different air conditioning systems, and the air quantity of the outdoor unit can be reasonably distributed.
Fourthly, when the outdoor unit is opened, if sundries such as foam, paperboards and plastic bags are absorbed, the sundries can block the air valve and cannot be completely attached to the heat exchanger, the outdoor unit can normally exchange heat, and the risk that the heat exchange variation leads to overhigh pressure is avoided.
And fifthly, when the outdoor unit is started at a low temperature limit, the air valve can be kept in a fully closed state, so that a high-low pressure difference can be conveniently established for the system, and the normal starting of the unit can be smoothly completed.
In some implementations, the multi-system outdoor unit of an air conditioner is further provided with a controller 2, and the controller 2 establishes control connection with the first air valve 3, the second air valve 4, the fan 1 and the like. So as to conveniently control the opening and closing degree and the opening and closing degree of each air valve and control the starting and stopping of the fan 1.
In some implementations, when the heat exchanger heat exchange requirements corresponding to different air conditioning systems are different, the opening degrees of the first air valve 3 and the second air valve 4 are required to be different, the heat exchange requirement is large, the corresponding opening degree of the air valves is relatively large, the heat exchange requirement is small, and the corresponding opening degree of the air valves is relatively small.
In some implementations, when the first heat exchanger 5 of the first air conditioning system and the second heat exchanger 8 of the second air conditioning system simultaneously generate heat exchange requirements, both the first air damper 3 and the second air damper 4 need to be opened. In this case, the rotational speed control of the fan 1 may be performed by taking the larger value of the required values of the first heat exchanger 5 and the second heat exchanger 8.
The specific opening conditions of the damper may be controlled according to set opening/closing conditions. The method comprises the following specific steps:
the controller is controlled according to the following steps:
when the system pressure corresponding to the first heat exchanger 5 is greater than the set value of the air opening valve, the first air valve 3 is controlled to be opened, and when the system pressure corresponding to the second heat exchanger 8 is greater than the set value of the air opening valve, the second air valve 4 is controlled to be opened; and when the first air valve 3 and the second air valve 4 are both opened, the opening degree of the first air valve 3 and the second air valve 4 is also required to be controlled according to the following conditions.
And when any one of the system pressure corresponding to the first heat exchanger 5 and the system pressure corresponding to the second heat exchanger 8 is greater than the set value of the starting pressure of the fan 1, controlling the fan 1 to start.
And when any one of the system pressure corresponding to the first heat exchanger 5 and the system pressure corresponding to the second heat exchanger 8 is greater than the set value of the full-speed pressure of the fan 1, controlling the full speed of the fan 1. And between the set value of the starting pressure of the fan 1 and the set value of the full-speed pressure of the fan, controlling the rotating speed of the fan 1 to keep increasing linearly, namely, the rotating speed of the fan 1 is increased along with the gradual increase of the larger value of the system pressure corresponding to the first heat exchanger 5 and the system pressure corresponding to the second heat exchanger 8.
When the heat exchange requirements of the first heat exchanger 5 and the second heat exchanger 8 are the same, the first air valve 3 and the second air valve 4 can be kept in a fully-opened state when being opened.
When the heat exchange requirement of the first heat exchanger 5 is greater than that of the second heat exchanger 8, the first air valve 3 is fully opened, and the opening angle of the second air valve 4 is smaller than the full opening angle. Specifically, the second damper 4 may be opened at an angle b (Q) 2 /Q 1 ) Beta is set forth; wherein b is a full open angle, Q 1 The heat exchange quantity Q of the air conditioning system corresponding to the first heat exchanger 5 2 The heat exchange quantity of the air conditioning system corresponding to the second heat exchanger 8 is shown, wherein beta represents an angle compensation coefficient.
Correspondingly, when the heat exchange requirement of the second heat exchanger 8 is greater than that of the first heat exchanger 5, the second air valve 4 is fully opened, and the opening angle of the first air valve 3 is smaller than the full opening angle. Specifically, the first damper 3 may be opened at an angle b (Q) 1 /Q 2 ) Beta is set forth; wherein b is a full open angle, Q 1 The heat exchange quantity Q of the air conditioning system corresponding to the first heat exchanger 5 2 The heat exchange quantity of the air conditioning system corresponding to the second heat exchanger 8 is shown, wherein beta represents an angle compensation coefficient.
The fully open angle is generally 90 degrees, but may be other angles, such as 80 degrees, 70 degrees, etc. The opening angle of the air valve can be zero when the air valve is closed, and the full opening angle can be a design parameter value of the air valve, namely, the angle required to rotate when the air valve 10 rotates to the maximum opening position from the closed position, wherein when the air valve 10 is located at the maximum opening position, the flow of the air valve is maximum at the moment. Of course, the opening angle of the air valve can be determined according to the specific structure of the air valve, and the larger the opening angle is, the larger the ventilation quantity is.
Specifically, when being provided with controller 2, can be controller 2 is in when 5 heat dissipation demands of first heat exchanger are greater than 8 heat dissipation demands of second heat exchanger, control first blast gate 3 is full-open, second blast gate 4 opening angle is less than full-open angle. Specifically, when the heat dissipation requirement of the first heat exchanger 5 is greater than the heat dissipation requirement of the second heat exchanger 8, the controller 2 controls the first air valve 3 to be fully opened, and the opening angle of the second air valve 4 is b (Q) 2 /Q 1 ) Beta is set forth; wherein b is a full open angle, Q 1 The heat exchange quantity Q of the air conditioning system corresponding to the first heat exchanger 5 2 The heat exchange quantity of the air conditioning system corresponding to the second heat exchanger 8 is shown, wherein beta represents an angle compensation coefficient.
In some embodiments, when only one of the first radiator and the second radiator is opened, such as when the first heat exchanger 5 needs to dissipate heat and the second heat exchanger 8 stops dissipating heat, the second air valve 4 is controlled to keep a closed state. And for the first air valve 3, the controller 2 controls the following steps:
when the system pressure corresponding to the first heat exchanger 5 is greater than the set value of the air opening valve, controlling the first air valve 3 to be completely opened;
when the system pressure corresponding to the first heat exchanger 5 is greater than a set starting pressure value of the fan 1, controlling the fan 1 to be started;
and when the system pressure corresponding to the first heat exchanger 5 is greater than the full-speed pressure set value of the fan 1, controlling the fan 1 to be at full speed, and when the system pressure corresponding to the first heat exchanger 5 is between the starting pressure set value of the fan 1 and the full-speed pressure set value of the fan 1, controlling the rotating speed of the fan 1 to keep increasing linearly.
Correspondingly, when the second heat exchanger needs to dissipate heat and the first heat exchanger stops dissipating heat, the first air valve 3 is controlled to keep a closed state, and for the second air valve 4, the controller controls the following steps:
when the system pressure corresponding to the second heat exchanger 8 is greater than the set value of the air opening valve, the second air valve 4 is controlled to be completely opened,
when the system pressure corresponding to the second heat exchanger 8 is greater than the set value of the starting pressure of the fan 1, the fan 1 is controlled to be started,
and when the system pressure corresponding to the second heat exchanger 8 is greater than the full-speed pressure set value of the fan 1, controlling the full speed of the fan 1, and controlling the rotating speed of the fan 1 to keep increasing linearly between the starting pressure set value of the fan 1 and the full-speed pressure set value of the fan.
In some embodiments, on the basis of the above, when the system pressure corresponding to the first heat exchanger 5 is reduced, the fan 1 and the first air valve 3 need to be closed in sequence. Specifically, the controller 2 performs control according to the following steps: when the system pressure corresponding to the first heat exchanger 5 is smaller than a difference value obtained by subtracting a first pressure return difference from a set starting pressure value of the fan 1, controlling the fan 1 to stop; and when the system pressure corresponding to the first heat exchanger 5 is smaller than a difference value obtained by subtracting a second pressure return difference from the set value of the air opening valve, controlling the first air valve 3 to close.
It should be noted that, when the second heat exchanger 8 needs to dissipate heat and the first heat exchanger 5 stops dissipating heat, the first air damper 3 is kept closed, and the second air damper 4 is opened according to the above control steps.
In addition, when the first heat exchanger 5 and the second heat exchanger 8 simultaneously generate heat exchange requirements, the opening and closing conditions of the first air damper 3 and the second air damper 4 can be referred to the above embodiment.
In some embodiments, it is possible to provide the first heat exchanger 5 with a first pressure sensor 6 and the second heat exchanger 8 with a second pressure sensor 7, so as to enable feedback of the pressure conditions at the first and second heat exchangers 5, 8.
In some embodiments, when the ambient temperature is lower than the preset threshold low temperature, the controller 2 controls the fan 1 to be opened before controlling the first air valve 3 and the second air valve 4 to be opened, so as to ensure that the high-low pressure difference is established, and then the air valves are opened. For example, in the early stage of system startup, before high and low pressures are not established, the first air valve 3 and the second air valve 4 of the corresponding system are kept closed, and after the high pressure is established to reach the valve opening pressure, the air valves corresponding to the systems are opened. When the multi-system air conditioning outdoor unit is in a limit low-temperature state and the multi-system air conditioning equipment is started, the air valve is in a completely closed state when the pressure does not reach the opening pressure of the air valve, so that the influence of external natural wind can be effectively avoided, the high-low pressure difference is quickly established, and the normal starting of the unit is completed.
In some embodiments, the air valve is prevented from interfering with the air body, so that the maximum air quantity requirement is ensured. Here, it is preferable that the first damper 3 and the first heat exchanger 5 are arranged in a stacked manner in the thickness direction, and the second damper 4 and the second heat exchanger 8 are arranged in a stacked manner in the thickness direction; when the first air valve 3 is fully opened, a valve 10 of the first air valve 3 is vertically arranged with the first heat exchanger 5; and when the second air valve 4 is fully opened, a valve 10 of the second air valve 4 is perpendicular to the second heat exchanger 8. To minimize interference with the valve 10 when fully open. Of course, an included angle between the air valve and the heat exchanger can be set, but an air storage cavity is easily formed between the air valve and the heat exchanger.
In some embodiments, the heat exchanger comprises a frame 9, the first heat exchanger 5 and the second heat exchanger 8 are arranged in a V shape in the frame 9, so that the whole heat exchanger is protected by the frame 9, and the V shape can reduce the pressure of the air cavity. And the fan 1 is arranged at the opening of the air cavity.
In some embodiments, as shown in fig. 3 and 4, when the air conditioning system corresponding to the first heat exchanger 5 and the air conditioning system corresponding to the second heat exchanger 8 are both in a shutdown state or have no heat exchange requirement, both the first damper 3 and the second damper 4 are in a closed state, so that the airflow is prevented from flowing and impurities are prevented from attaching to the first heat exchanger 5 and the second heat exchanger 8. Meanwhile, the air-blowing sun-drying time is reduced, and the corrosion aging period of the outdoor unit heat exchanger is prolonged.
In some embodiments, as shown in fig. 5 and 6. When the double-system air conditioner outdoor unit detects that the first heat exchanger 5 has a heat exchange requirement and the second heat exchanger 8 has no heat exchange requirement, the first air valve 3 is completely opened at the moment, the second air valve 4 is closed, and the pressure detected by the first pressure sensor 6 is transmitted to the control panel to control the rotating speed of the fan 1. Compare in not adding the blast gate state, the amount of wind of first heat exchanger 5 department this moment increases by a wide margin, and heat transfer capacity increases, and complete machine high pressure and consumption reduce, and the efficiency promotes by a wide margin.
In some embodiments, as shown in fig. 7, 8. When the dual-system outdoor unit and the dual-system outdoor unit of the air conditioner detect that the first heat exchanger 5 and the second heat exchanger 8 both have heat exchange requirements, the first air valve 3 and the second air valve 4 are opened simultaneously. The specific opening degree can be referred to the above embodiment. The air inlet quantity is adjusted by adjusting the angle of the air valve, the air quantity is distributed according to requirements, and the system performance is brought into play to the optimal state.
In some embodiments, as shown in fig. 9, when the multi-system outdoor air-conditioning unit is opened, the corresponding air valve is in an open state, if impurities such as foam, paper boards, plastic films and the like are suddenly sucked in air, the impurities are isolated by the blades of the air inlet valve in front of the heat exchanger and cannot be completely attached to the heat exchanger, the unit can still exchange heat, and adverse conditions such as high-pressure alarm and the like caused by the influence of complete attachment on heat exchange of the system are avoided.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a multi-system air condensing units, includes fan, first heat exchanger and second heat exchanger, first heat exchanger with the second heat exchanger is corresponding to two air conditioning system respectively, the air-out side of first heat exchanger with the air-out side of second heat exchanger sets up relatively and forms the wind chamber between, the fan is used for following the wind chamber is toward outer convulsions, its characterized in that, first blast gate has been arranged to the air inlet side of first heat exchanger, the second blast gate has been arranged to the air inlet side of second heat exchanger, first blast gate with the second blast gate can the independent control switching degree.
2. The outdoor unit of claim 1, further comprising a controller; when the first heat exchanger and the second heat exchanger simultaneously generate heat exchange demands, the controller controls the first air valve and the second air valve to be opened and closed according to set opening and closing conditions, and controls the fan to be controlled according to a larger value of the rotating speed requirements of a system where the first heat exchanger is located and a system where the second heat exchanger is located; the controller controls the first air valve and the second air valve to be fully opened when the first heat exchanger and the second heat exchanger generate the same heat exchange requirement; when the heat dissipation requirement of the first heat exchanger is greater than the heat dissipation requirement of the second heat exchanger, the controller controls the first air valve to be opened fully, and the opening angle of the second air valve is b (Q) 2 /Q 1 ) Beta is set forth; when the heat dissipation requirement of the second heat exchanger is greater than the heat dissipation requirement of the first heat exchanger, the controller controls the second air valve to be opened fully, and the opening angle of the first air valve is b (Q) 1 /Q 2 ) Beta is set forth; wherein b is a full open angle, Q 1 The heat exchange quantity Q of the air conditioning system corresponding to the first heat exchanger 2 And the heat exchange quantity of the air conditioning system corresponding to the second heat exchanger is represented by beta, wherein the beta represents an angle compensation coefficient.
3. The outdoor unit of claim 1, further comprising a controller, wherein the controller controls the first damper to be fully open when the heat dissipation requirement of the first heat exchanger is greater than the heat dissipation requirement of the second heat exchanger, and the opening angle of the second damper is less than a full opening angle.
4. The outdoor unit of claim 3, wherein the full open angle is 90 degrees.
5. The outdoor unit of claim 4, wherein when the first heat exchanger needs to dissipate heat and the second heat exchanger stops dissipating heat, the controller performs the following steps:
when the system pressure corresponding to the first heat exchanger is greater than the set value of the air opening valve, the first air valve is controlled to be completely opened,
when the system pressure corresponding to the first heat exchanger is larger than the set value of the starting pressure of the fan, the fan is controlled to be started,
when the system pressure corresponding to the first heat exchanger is larger than the full-speed pressure set value of the fan, controlling the full speed of the fan, and controlling the rotating speed of the fan to keep increasing linearly between the starting pressure set value of the fan and the full-speed pressure set value of the fan;
when the second heat exchanger needs to dissipate heat and the first heat exchanger stops dissipating heat, the controller controls the heat dissipation device according to the following steps:
when the system pressure corresponding to the second heat exchanger is greater than the set value of the air opening valve, the second air valve is controlled to be completely opened,
when the system pressure corresponding to the second heat exchanger is larger than the set value of the starting pressure of the fan, the fan is controlled to be started,
and when the system pressure corresponding to the second heat exchanger is greater than the full-speed pressure set value of the fan, controlling the full speed of the fan, and controlling the rotating speed of the fan to keep increasing linearly between the starting pressure set value of the fan and the full-speed pressure set value of the fan.
6. The outdoor unit of claim 5, wherein when the first heat exchanger needs to dissipate heat and the second heat exchanger stops dissipating heat, the controller controls the heat exchanger according to the following steps:
when the system pressure corresponding to the first heat exchanger is smaller than a difference value obtained by subtracting a first pressure return difference from the set fan starting pressure value, controlling the fan to stop;
and when the system pressure corresponding to the first heat exchanger is smaller than a difference value obtained by subtracting a second pressure return difference from the set value of the air opening valve, controlling the first air valve to close.
7. The outdoor unit of claim 6, wherein a first pressure sensor is disposed at the first heat exchanger, and a second pressure sensor is disposed at the second heat exchanger.
8. The outdoor unit of claim 7, wherein the controller controls the fans to be turned on before the first and second dampers are turned on when the ambient temperature is lower than a preset threshold low temperature.
9. The outdoor unit of any one of claims 1 to 8, wherein the first damper is disposed to overlap the first heat exchanger in a thickness direction, and the second damper is disposed to overlap the second heat exchanger in the thickness direction; when the first air valve is fully opened, the valve of the first air valve is vertically arranged with the first heat exchanger; and when the second air valve is fully opened, the valve of the second air valve is perpendicular to the second heat exchanger.
10. The outdoor unit of claim 9, comprising a frame, wherein the first heat exchanger and the second heat exchanger are disposed in the frame in a V-shape, and the blower is disposed at the opening of the air chamber.
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| CN202210636943.8A CN114963345B (en) | 2022-06-07 | 2022-06-07 | Multi-system air conditioner outdoor unit |
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| CN202210636943.8A CN114963345B (en) | 2022-06-07 | 2022-06-07 | Multi-system air conditioner outdoor unit |
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