CN113251474A - Air conditioner with double compressors - Google Patents
Air conditioner with double compressors Download PDFInfo
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- CN113251474A CN113251474A CN202110468663.6A CN202110468663A CN113251474A CN 113251474 A CN113251474 A CN 113251474A CN 202110468663 A CN202110468663 A CN 202110468663A CN 113251474 A CN113251474 A CN 113251474A
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- heat exchange
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- outdoor
- air conditioner
- refrigerant circulation
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- 239000003507 refrigerant Substances 0.000 claims abstract description 138
- 230000009977 dual effect Effects 0.000 claims description 19
- 238000010257 thawing Methods 0.000 abstract description 38
- 230000000694 effects Effects 0.000 abstract description 23
- 238000000034 method Methods 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 16
- 238000001816 cooling Methods 0.000 description 9
- 238000005057 refrigeration Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F24F1/0003—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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners, and particularly provides a double-compressor air conditioner. The invention aims to solve the problem that the existing air conditioner has poor defrosting effect by additionally arranging a defrosting branch. Therefore, the air conditioner with the double compressors comprises the indoor unit and the outdoor unit, a first refrigerant circulation loop is arranged between the indoor unit and the outdoor unit, an indoor coil, a first compressor, an outdoor coil and a first throttling member are sequentially arranged on the first refrigerant circulation loop, a second refrigerant circulation loop is further arranged in the outdoor unit, a first heat exchange coil, a four-way valve, a second compressor, a second heat exchange coil and a second throttling member are arranged on the second refrigerant circulation loop, the first heat exchange coil can exchange heat with at least one part of the first refrigerant circulation loop between the first throttling member and the outdoor coil, so that a refrigerant can enter the outdoor coil after being subjected to temperature rise treatment, the temperature rise treatment can be performed on the refrigerant before entering the outdoor coil, and the defrosting efficiency can be effectively improved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides a double-compressor air conditioner.
Background
The air conditioner is provided with the refrigerant circulating loop, so that the refrigerant continuously exchanges heat between the indoor part and the outdoor part to meet the heat exchange requirement of a user, when the air conditioner operates in winter to heat, the outdoor unit is easy to frost, the heat exchange efficiency of the outdoor coil pipe can be greatly influenced by the frost, and the heat exchange efficiency of the whole air conditioner is further influenced; therefore, the defrosting problem is a technical problem that each air conditioner must solve.
In order to effectively solve the problem that the heat exchange efficiency is affected by frosting of the outdoor coil, a plurality of defrosting methods are designed by the prior art, and although the defrosting methods can achieve a certain defrosting effect, certain problems also exist. For example, most of the existing air conditioners achieve a defrosting effect by arranging a defrosting branch, when an outdoor coil needs defrosting, the defrosting branch is communicated, a refrigerant in the branch is heated, and the heated refrigerant is firstly converged with the refrigerant in a refrigerant circulation loop and then enters the outdoor coil, so that the defrosting effect is achieved; the refrigerant may be heated by adding a heating member or by another refrigerant circulation circuit. However, in any heating method, the heated refrigerant needs to be merged with the unheated refrigerant before entering the outdoor coil, which not only affects the temperature rise effect of the refrigerant, but also easily causes the problem of unstable refrigerant state.
Accordingly, there is a need in the art for a new dual compressor air conditioner that solves the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the conventional air conditioner has a poor defrosting effect by adding a defrosting branch, the present invention provides a new dual-compressor air conditioner, which includes an indoor unit and an outdoor unit, wherein a first refrigerant circulation loop is disposed between the indoor unit and the outdoor unit, an indoor coil, a first compressor, an outdoor coil, and a first throttling member are sequentially disposed on the first refrigerant circulation loop, the indoor coil is disposed in the indoor unit, the outdoor coil is disposed in the outdoor unit, a second refrigerant circulation loop is further disposed in the outdoor unit, a first heat exchange coil, a four-way valve, a second compressor, a second heat exchange coil, and a second throttling member are disposed on the second refrigerant circulation loop, and the first heat exchange coil can be connected to at least a portion of the first refrigerant between the first throttling member and the outdoor coil The circulation loop carries out heat exchange so that the refrigerant can enter the outdoor coil pipe after being subjected to temperature rise treatment.
In a preferred technical solution of the above dual-compressor air conditioner, the dual-compressor air conditioner further includes a shell-and-tube heat exchanger, and the first heat exchange coil exchanges heat with at least a part of the first refrigerant circulation loop between the first throttling member and the outdoor coil through the shell-and-tube heat exchanger.
In the preferable technical scheme of the air conditioner with the double compressors, the shell-and-tube heat exchanger comprises a shell and a heat exchange tube, a heat exchange cavity is formed in the shell, the heat exchange tube is arranged in the heat exchange cavity, the first heat exchange coil is communicated with the heat exchange tube, and at least one part of the first refrigerant circulation loop between the first throttling component and the outdoor coil is communicated with the heat exchange cavity.
In the preferable technical scheme of the air conditioner with the double compressors, the shell-and-tube heat exchanger comprises a shell, a first heat exchange tube and a second heat exchange tube, a heat exchange cavity is formed in the shell, the first heat exchange tube and the second heat exchange tube are arranged in the heat exchange cavity, the first heat exchange coil is communicated with the first heat exchange tube, and at least one part of the first refrigerant circulation loop between the first throttling member and the outdoor coil is communicated with the second heat exchange tube.
In the preferable technical scheme of the air conditioner with the double compressors, the heat exchange cavity is filled with a heat exchange medium.
In a preferred technical solution of the above dual-compressor air conditioner, the second heat exchange coil is disposed close to the outdoor coil.
In a preferred embodiment of the above-described air conditioner with two compressors, at least a part of the air intake section of the second compressor is provided close to the control device of the outdoor unit.
In a preferred embodiment of the above dual-compressor air conditioner, the control device includes a radiator, and at least a portion of the air intake section of the second compressor is disposed close to the radiator.
In a preferred embodiment of the above dual-compressor air conditioner, at least a portion of the air intake section of the second compressor is disposed in a curved manner, and the curved portion of the air intake section of the second compressor is disposed close to the heat sink.
In a preferred embodiment of the above-mentioned dual-compressor air conditioner, the first throttle member and/or the second throttle member is/are an electronic expansion valve.
As can be understood by those skilled in the art, in the technical solution of the present invention, the dual-compressor air conditioner of the present invention includes an indoor unit and an outdoor unit, a first refrigerant circulation loop is disposed between the indoor unit and the outdoor unit, an indoor coil, a first compressor, an outdoor coil and a first throttle member are sequentially disposed on the first refrigerant circulation loop, the indoor coil is disposed in the indoor unit, the outdoor coil is disposed in the outdoor unit, a second refrigerant circulation loop is further disposed in the outdoor unit, a first heat exchange coil, a four-way valve, a second compressor, a second heat exchange coil and a second throttle member are disposed on the second refrigerant circulation loop, the first heat exchange coil can exchange heat with at least a part of the first refrigerant circulation loop between the first throttle member and the outdoor coil, so that the refrigerant can enter the outdoor coil pipe after being subjected to temperature rise treatment. Based on the structural arrangement, the second refrigerant circulation loop is additionally arranged in the outdoor unit, so that when the outdoor coil pipe is frosted or has a frosting tendency, the second refrigerant circulation loop can exchange heat with at least one part of the first refrigerant circulation loop between the first throttling component and the outdoor coil pipe through the first heat exchange coil pipe, the second refrigerant circulation loop can directly heat the refrigerant flowing into the outdoor coil pipe, the refrigerant entering the outdoor coil pipe is effectively ensured to be subjected to heating treatment, and the defrosting efficiency of the air conditioner is effectively improved.
Drawings
Fig. 1 is a schematic view of the overall structure of a dual compressor air conditioner of the present invention in a first operating state;
FIG. 2 is a schematic view of the overall configuration of the dual compressor air conditioner of the present invention in a second operating condition;
FIG. 3 is a schematic view of the overall configuration of the dual compressor air conditioner of the present invention in a third operating state;
fig. 4 is a flowchart illustrating major steps of a control method of a dual compressor air conditioner according to the present invention;
FIG. 5 is a flowchart illustrating the detailed steps of a preferred embodiment of a control method of a dual compressor air conditioner according to the present invention;
reference numerals:
11. a first refrigerant circulation circuit; 111. an indoor coil pipe; 112. a first four-way valve; 113. a first compressor; 114. an outdoor coil pipe; 115. a first throttle member; 116. a first shut-off valve; 117. a second stop valve;
12. a second refrigerant circulation circuit; 121. a first heat exchange coil; 122. a second four-way valve; 123. a second compressor; 124. a second heat exchange coil; 125. a second throttling member;
13. a shell and tube heat exchanger;
14. a control device;
15. an outdoor fan.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, although the dual-compressor air conditioner described in the present preferred embodiment is a single-split type air conditioner, the dual-compressor air conditioner may obviously be a single-split type air conditioner. Such changes in the specific application object do not depart from the basic principle of the present invention and belong to the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, it should be noted that, unless otherwise explicitly stated or limited, the term "coupled" in the description of the present invention is to be interpreted broadly, and may be, for example, directly coupled or indirectly coupled through an intermediary member, or may be a communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. Although the steps of the control method of the present invention are described herein in a particular order, the order is not limiting and those skilled in the art can perform the steps in a different order without departing from the basic principles of the invention.
Referring first to fig. 1 to 3, wherein fig. 1 is a schematic view of an overall structure of a dual-compressor air conditioner according to the present invention in a first operating state; FIG. 2 is a schematic view of the overall configuration of the dual compressor air conditioner of the present invention in a second operating condition; fig. 3 is a schematic view of the overall structure of the dual compressor air conditioner of the present invention in a third operating state. As shown in fig. 1 to 3, the dual-compressor air conditioner of the present invention includes an indoor unit and an outdoor unit, wherein the indoor unit is a part in a left side frame, and the outdoor unit is a part in a right side frame.
Specifically, a first refrigerant circulation circuit 11 is provided between the indoor unit and the outdoor unit, the air conditioner with the double compressors continuously exchanges heat between the indoor and the outdoor through the first refrigerant circulation loop 11 to meet the heat exchange requirement of a user, an indoor coil 111, a first four-way valve 112, a first compressor 113, an outdoor coil 114 and a first throttling member 115 are arranged on the first refrigerant circulation loop 11, an outdoor fan 15 is arranged near the outdoor coil 114 to improve the heat exchange efficiency of the outdoor coil 114, wherein an indoor coil 111 is provided in the indoor unit, a first four-way valve 112, a first compressor 113, an outdoor coil 114, and a first throttling member 115 are provided in the outdoor unit, the refrigerant flow direction in the first refrigerant circulation circuit 11 can be controlled by controlling the communication state of the first four-way valve 112, thereby controlling the heat exchange state of the dual-compressor air conditioner. The first refrigerant circulation circuit 11 is further provided with a first stop valve 116 and a second stop valve 117, and the first stop valve 116 and the second stop valve 117 are respectively located on both sides of the indoor coil 111. As a preferred arrangement, the first throttling element 115 is an electronic expansion valve; of course, this is not restrictive, and the first throttling member 115 may also be other members having a throttling effect, such as a capillary tube, etc. It should be noted that, the present invention does not limit the specific structure of the first refrigerant circulation loop 11, and the technical staff can set the configuration according to the actual use requirement; for example, the first refrigerant circulation circuit 11 may not be provided with the first four-way valve 112, that is, the first refrigerant circulation circuit 11 may only perform a heating cycle; for example, other members may be provided in the first refrigerant circulation circuit 11. In addition, the present invention does not impose any limitation on the specific type of each component, for example, the first compressor 113 may be either an inverter compressor or a fixed frequency compressor. Changes in these specific constructions do not depart from the basic principles of the invention and are intended to be within the scope of the invention.
Further, in the technical scheme of the present invention, a second refrigerant circulation circuit 12 is further disposed in the outdoor unit, a first heat exchange coil 121, a second four-way valve 122, a second compressor 123, a second heat exchange coil 124 and a second throttling member 125 are disposed on the second refrigerant circulation circuit 12, the first heat exchange coil 121 can exchange heat with at least a portion of the first refrigerant circulation circuit 11 located between the first throttling member 115 and the outdoor coil 114, so that the refrigerant can enter the outdoor coil 114 after being subjected to a temperature rise process, and the flow direction of the refrigerant in the second refrigerant circulation circuit 12 can be controlled by controlling the communication state of the second four-way valve 122, thereby controlling the heat exchange state of the first heat exchange coil 121. It should be noted that the present invention does not limit the specific structure of the second refrigerant circulation circuit 12, and the skilled person can set it according to the actual use requirement. As a preferable configuration, the second compressor 123 is an inverter compressor, and the second throttle member 125 is an electronic expansion valve; of course, this is not restrictive, and the second compressor 123 may also be a fixed frequency compressor, and the second throttling member 125 may also be other members having a throttling effect, such as a capillary tube, etc. In addition, it should be noted that the specific types of the components disposed on the second refrigerant circulation circuit 12 are not limited, and the skilled person can set the types according to the actual use requirement. Such changes in the specific structure may be made without departing from the basic principles of the invention and are intended to be within the scope of the invention.
In addition, it should be noted that, the present invention does not limit any specific arrangement manner of the first heat exchanging coil 121 and at least a part of the first refrigerant circulation circuit 11 between the first throttling element 115 and the outdoor coil 114, as long as the first heat exchanging coil 121 can exchange heat with at least a part of the first refrigerant circulation circuit 11 between the first throttling element 115 and the outdoor coil 114; for example, the first heat exchanging coil 121 may be disposed close to at least a portion of the first refrigerant circulation circuit 11 between the first throttling element 115 and the outdoor coil 114, so as to achieve the heat exchanging effect, and a technician may set the heat exchanging effect according to actual use requirements.
Based on the above arrangement, the outdoor unit of the present invention is additionally provided with a small circulation loop, that is, the second refrigerant circulation loop 12, so that when the outdoor coil 114 needs defrosting, the first heat exchange coil 121 disposed on the second refrigerant circulation loop 12 can perform a temperature raising process on at least a part of the refrigerant in the first refrigerant circulation loop 11 located between the first throttling member 115 and the outdoor coil 114, so that the refrigerant can enter the outdoor coil 114 after the temperature raising process, thereby effectively improving defrosting efficiency, and further effectively improving heat exchange efficiency of the first refrigerant circulation loop 11. Meanwhile, since the reverse circulation of the second refrigerant circulation loop 12 does not affect the heat exchange effect of the indoor unit, after defrosting is finished, if the second heat exchange coil 124 is frosted, the frost condensed on the second heat exchange coil 124 can be directly eliminated by controlling the reverse circulation of the second refrigerant circulation loop 12, so that the heat exchange efficiency of the indoor unit can be effectively ensured while the defrosting effect is ensured.
With continuing reference to fig. 1 to 3, as shown in fig. 1 to 3, as a preferred arrangement, the dual-compressor air conditioner further includes a shell-and-tube heat exchanger 13, and the first heat exchanging coil 121 exchanges heat with at least a portion of the first refrigerant circulating loop 11 located between the first throttling member 115 and the outdoor coil 114 through the shell-and-tube heat exchanger 13, so as to effectively improve the heat exchanging efficiency of the shell-and-tube heat exchanger 13, and further improve the defrosting efficiency.
Further, as a preferred setting mode, the shell-and-tube heat exchanger 13 includes a shell and a heat exchange tube, the shell is formed with a heat exchange cavity, the heat exchange tube is disposed in the heat exchange cavity, of course, a technician can set the shell and the specific structure and shape of the heat exchange cavity according to the actual use requirement, which is not restrictive. Specifically, the first heat exchange coil 121 is communicated with the heat exchange pipe; it should be noted that the first heat exchanging coil 121 may be disconnected at this position, and two fractures are respectively connected to two ends of the heat exchanging pipe, so that the first heat exchanging coil 121 is communicated with the heat exchanging pipe; the first heat exchanging coil 121 can also be directly regarded as the heat exchanging pipe (i.e., the solution shown in fig. 1 to 3), which is not restrictive, as long as the refrigerant in the first heat exchanging coil 121 can exchange heat in the shell-and-tube heat exchanger 13 through the heat exchanging pipe. At least one part of the first refrigerant circulation loop 11 between the first throttling member 115 and the outdoor coil 114 is communicated with the heat exchange cavity, that is, the first refrigerant circulation loop 11 is disconnected at the position, and two fractures are respectively connected with two ends of the heat exchange cavity, so that the refrigerant in the first refrigerant circulation loop 11 can flow through the heat exchange cavity, and the refrigerant flowing through the heat exchange cavity can exchange heat with the refrigerant flowing through the heat exchange tube, and further the refrigerant in the first heat exchange coil 121 can heat the refrigerant in the first refrigerant circulation loop 11.
Further, as another preferred arrangement mode, the shell-and-tube heat exchanger 13 includes a shell, a first heat exchange tube and a second heat exchange tube, the shell is formed with a heat exchange cavity, the first heat exchange tube and the second heat exchange tube are arranged in the heat exchange cavity, of course, a technician can set the specific structure and shape of the shell and the heat exchange cavity according to the actual use requirement, which is not restrictive. Specifically, the first heat exchange coil 121 is communicated with the first heat exchange tube, it should be noted that the first heat exchange coil 121 may be disconnected at this position, and two fractures are respectively connected to two ends of the first heat exchange tube, so that the first heat exchange coil 121 is communicated with the first heat exchange tube; the first heat exchanging coil 121 can also be directly regarded as the first heat exchanging tube, which is not restrictive, as long as the refrigerant in the first heat exchanging coil 121 can exchange heat in the shell-and-tube heat exchanger 13 through the first heat exchanging tube. At least a part of the first refrigerant circulation circuit 11 between the first throttling member 115 and the outdoor coil 114 is communicated with the second heat exchange tube, it should be noted that the first refrigerant circulation circuit 11 can be disconnected at this point, and two fractures are respectively connected with two ends of the second heat exchange tube, so that the first refrigerant circulation circuit 11 is communicated with the second heat exchange tube; the first refrigerant circulation loop 11 of the portion may also be directly regarded as the second heat exchange tube, which is not restrictive, as long as the refrigerant in the first refrigerant circulation loop 11 can exchange heat in the shell-and-tube heat exchanger 13 through the second heat exchange tube. Further preferably, heat exchange media are filled in the heat exchange cavity, the heat exchange media preferably adopt water, and the first heat exchange tube and the second heat exchange tube can realize a better heat exchange effect through the heat exchange media filled in the heat exchange cavity, so that the defrosting efficiency is further improved. Of course, the heat exchange can also be carried out directly by air, which is not restrictive.
Also, as a preferred arrangement, the second heat exchanging coil 124 is disposed adjacent the outdoor coil 114. Of course, this is only a preferred arrangement and is not limiting. With this arrangement, when the second heat exchanging coil 124 serves as a condenser and the outdoor coil 114 serves as an evaporator, the outdoor coil 114 can absorb heat released from the second heat exchanging coil 124, so as to improve the evaporation efficiency of the outdoor coil 114; also, when the second heat exchanging coil 124 serves as an evaporator and the outdoor coil 114 serves as a condenser, the second heat exchanging coil 124 can also absorb heat released from the outdoor coil 114, so as to improve condensing efficiency of the outdoor coil 114.
With continuing reference to fig. 1 to 3, as shown in fig. 1 to 3, the dual-compressor air conditioner further includes a control device 14, the control device 14 is disposed in the outdoor unit, and at least a portion of the air inlet section of the second compressor 123 is disposed near the control device 14, so that the air inlet section of the second compressor 123 can perform a cooling process on the control device 14 only when the second refrigerant circulation loop 12 is in operation, thereby effectively reducing the temperature of the control device 14 and ensuring the reliability of the operation thereof. Specifically, the control device 14 includes a controller (not shown in the figure) and a heat sink (not shown in the figure) connected to the controller, wherein the heat sink can improve the heat dissipation efficiency of the controller to ensure the operating temperature of the controller. Of course, the present invention does not limit the specific structure of the control device 14, and the technician can set the configuration according to the actual use requirement as long as the control device 14 includes a controller. Based on this, at least a part of the air intake section of the second compressor 123 is disposed close to the radiator of the control device 14, so as to further enhance the cooling effect. It is further preferable that at least a portion of the air inlet section of the second compressor 123 is disposed in a curved manner, preferably in a bending manner of bending back and forth, and the curved portion of the air inlet section of the second compressor 123 is disposed close to the heat sink of the control device 14, so as to enhance the cooling effect of the portion of the pipeline on the control device 14 to the maximum extent.
In addition, the controller can obtain the frosting condition and frosting degree of each coil, and also can obtain the temperature of the environment where the outdoor unit is located and the temperature of the control device 14; of course, the present invention does not limit the specific obtaining method, and the technician can set the parameters according to the actual use requirement, for example, the parameters can be obtained by setting the temperature sensor. Based on the acquired data, the controller can also control the operating state of the dual-compressor air conditioner, for example, the operating state of the second refrigerant circulation circuit 12, the operating frequency of the compressor, the opening degree of the throttle member, and the like. In addition, it can be understood by those skilled in the art that the present invention does not limit the specific structure and model of the controller, and the controller may be the original controller of the dual-compressor air conditioner, or may be a controller separately configured to execute the control method of the present invention, and the structure and model of the controller may be set by a technician according to actual use requirements.
Referring next to fig. 4, there is shown a flow chart illustrating major steps of a control method of a dual compressor air conditioner according to the present invention. As shown in fig. 4, based on the air conditioner described in the above embodiment, the control method of the present invention mainly includes the following steps:
s1: acquiring the frosting condition of the outdoor coil pipe when the first refrigerant circulation loop executes the heating circulation;
s2: and if the outdoor coil has a frosting phenomenon or generates a frosting tendency, controlling the second refrigerant circulation loop to execute heating circulation so as to enable the first heat exchange coil to be used as a condenser to defrost the outdoor coil.
Further, in step S1, when the first refrigerant circulation circuit 11 performs a heating cycle, that is, the high-temperature gaseous refrigerant discharged from the first compressor 113 passes through the first four-way valve 112 and enters the indoor coil 111 (as shown by the path indicated by the dashed line in fig. 1 and 2), the indoor coil 111 serves as a condenser, and the outdoor coil 114 serves as an evaporator. In this case, the frosting of the outdoor coil 114 is captured; it should be noted that, the present invention does not limit the specific way in which the controller obtains the frosting condition of the outdoor coil 114, and the technician can set the frosting condition according to the actual use requirement; for example, the frosting condition may be determined by acquiring the temperature of the outdoor coil 114, the frosting condition may be determined by acquiring the current value of the outdoor fan 15, or the frosting condition may be determined by acquiring the image information of the outdoor coil 114, which is not limited.
Further, in step S2, if the outdoor coil 114 has frosting phenomenon or has frosting tendency, the technician can set its specific determination mode according to the actual use requirement; for example, when the temperature of the outdoor coil 114 is lower than a predetermined temperature, it is determined that the outdoor coil 114 has frosted; for another example, when the temperature of the outdoor coil 114 is lower than a predetermined temperature and the outdoor humidity is higher than a predetermined humidity, it is determined that the outdoor coil 114 has a frosting tendency. In this case, the controller controls the second refrigerant circulation circuit 12 to perform a heating cycle, that is, the high-temperature gaseous refrigerant discharged from the second compressor 123 enters the first heat exchange coil 121 through the second four-way valve 122 (as shown in a path of a dotted line in fig. 1), at this time, the first heat exchange coil 121 serves as a condenser, the second heat exchange coil 124 serves as an evaporator, and the first heat exchange coil 121 can perform a temperature raising process on the refrigerant before flowing into the outdoor coil 114 through the shell-and-tube heat exchanger 13, so as to perform a defrosting effect on the outdoor coil 114.
Referring next to fig. 5, there is shown a flowchart illustrating the detailed steps of a preferred embodiment of a control method of a dual compressor air conditioner in accordance with the present invention. As shown in fig. 5, based on the air conditioner described in the above preferred embodiment, the preferred embodiment of the control method of the present invention specifically includes the following steps:
s101: acquiring the frosting condition of the outdoor coil pipe when the first refrigerant circulation loop executes the heating circulation;
s102: if the outdoor coil pipe has frosting phenomenon or frosting tendency, controlling the second refrigerant circulation loop to execute heating circulation so as to enable the first heat exchange coil pipe to be used as a condenser to defrost the outdoor coil pipe;
s103: further acquiring the frosting degree of the outdoor coil pipe;
s104: controlling an operation frequency of the second compressor and/or an opening degree of the second throttling member according to a frosting degree of the outdoor coil pipe;
s105: acquiring the defrosting condition of the outdoor coil pipe;
s106: judging whether the defrosting of the outdoor coil pipe is finished; if yes, go to step S107; if not, step S103 is executed again;
s107: further acquiring the frosting condition of the second heat exchange coil;
s108: judging whether the second heat exchange coil has a frosting phenomenon; if yes, go to step S110; if not, go to step S109;
s109: controlling the second refrigerant circulation loop to stop running;
s110: and controlling the second refrigerant circulation loop to execute refrigeration cycle so that the second heat exchange coil is used as a condenser to defrost the second heat exchange coil.
Further, in step S101, when the first refrigerant circulation circuit 11 performs a heating cycle, that is, the high-temperature gaseous refrigerant discharged from the first compressor 113 passes through the first four-way valve 112 and enters the indoor coil 111, the indoor coil 111 serves as a condenser, and the outdoor coil 114 serves as an evaporator. In this case, the frosting of the outdoor coil 114 is captured; it should be noted that, the present invention does not limit the specific way in which the controller obtains the frosting condition of the outdoor coil 114, and the technician can set the frosting condition according to the actual use requirement; for example, the frosting condition may be determined by acquiring the temperature of the outdoor coil 114, the frosting condition may be determined by acquiring the current value of the outdoor fan 15, or the frosting condition may be determined by acquiring the image information of the outdoor coil 114, which is not limited.
Further, in step S102, if the outdoor coil 114 has a frosting phenomenon or a frosting tendency, the technician may set its specific determination mode according to the actual use requirement; for example, when the temperature of the outdoor coil 114 is lower than a predetermined temperature, it is determined that the outdoor coil 114 has frosted; for another example, when the temperature of the outdoor coil 114 is lower than a predetermined temperature and the outdoor humidity is higher than a predetermined humidity, it is determined that the outdoor coil 114 has a frosting tendency. In this case, the controller controls the second refrigerant circulation circuit 12 to perform a heating cycle, that is, the high-temperature gaseous refrigerant discharged from the second compressor 123 enters the first heat exchange coil 121 through the second four-way valve 122 (as shown in a path of a dotted line in fig. 1), at this time, the first heat exchange coil 121 serves as a condenser, the second heat exchange coil 124 serves as an evaporator, and the first heat exchange coil 121 can perform a temperature raising process on the refrigerant before flowing into the outdoor coil 114 through the shell-and-tube heat exchanger 13, so as to perform a defrosting effect on the outdoor coil 114.
Further, in the case where the second refrigerant circulation circuit 12 performs the heating cycle, the controller further acquires the degree of frosting of the outdoor coil 114 in step S103. It should be noted that, the present invention does not limit the specific manner of determining the frosting degree of the outdoor coil 114 by the controller, and a technician can set the frosting degree according to the actual use requirement, for example, the frosting degree of the outdoor coil 114 can be determined by an image contrast manner; for another example, the degree of frosting of the outdoor coil 114 may be determined by a numerical range in which the current value of the outdoor fan 15 is set.
Based on the judgment result of step S103, the controller can control the operation frequency of the second compressor 123 and/or the opening degree of the second throttling member 125 according to the frosting degree of the outdoor coil 114; of course, the technician can set the specific control mode according to the actual use requirement. As a preferable control manner, the more severe the degree of frosting of the outdoor coil 114 is, the higher the operation frequency of the second compressor 123 is, and the greater the opening degree of the second throttling member 125 is; on the contrary, the more slight the frost formation degree of the outdoor coil 114 is, the lower the operation frequency of the second compressor 123 is, and the smaller the opening degree of the second throttling member 125 is, so that the defrosting effect is ensured and the defrosting power consumption can be effectively saved. Of course, it is also possible to achieve the corresponding defrosting effect only by controlling the operation frequency of the second compressor 123 or the opening degree of the second throttling member 125.
Next, in step S105, the controller can obtain the defrosting condition of the outdoor coil 114, and of course, the invention does not limit the specific obtaining manner, and the technician can set the defrosting condition according to the actual use requirement. Based on the acquisition result of step S105, the controller can determine whether the defrosting of the outdoor coil 114 is finished in step S106, so as to perform different operations accordingly.
Based on the determination result in step S106, if the defrosting of the outdoor coil 114 is not finished, step S103 is executed again, so as to correspondingly control the operating frequency of the second compressor 123 and/or the opening degree of the second throttling element 125 according to the frosting degree of the outdoor coil 114 in different periods, and further enable the defrosting capacity of the second refrigerant circulation circuit 12 to be always adapted to the frosting degree of the outdoor coil 114, thereby effectively ensuring the defrosting efficiency. Meanwhile, if the outdoor coil 114 has been defrosted, step S107 is executed, that is, the controller further obtains the frosting condition of the second heat exchange coil 124; it should be noted that, the present invention does not limit the specific obtaining manner, and a technician may set the obtaining manner according to the actual use requirement as long as the controller can obtain the frosting condition of the second heat exchanging coil 124.
Based on the obtained result in step S107, the controller can correspondingly control the operation state of the second refrigerant circulation circuit 12 according to the frosting condition of the second heat exchange coil 124, so as to simultaneously consider the defrosting efficiency and the defrosting cost. Further, in step S108, the controller can determine whether the second heat exchanging coil 124 is frosted, so as to correspondingly control the operation state of the second refrigerant circulation loop 12 according to the determination result.
Specifically, if the second heat exchanging coil 124 is not frosted, step S109 is executed, that is, the controller controls the second refrigerant circulation circuit 12 to stop operating, so as to effectively save energy consumption. Meanwhile, if the second heat exchange coil 124 is frosted, step S110 is executed, the controller controls the second four-way valve 122 to change the direction, the second refrigerant circulation loop 12 is switched to the refrigeration cycle (as shown in fig. 2), that is, the high-temperature gaseous refrigerant discharged by the second compressor 123 enters the second heat exchange coil 124 through the second four-way valve 122 (as shown in the path of the dotted line part in fig. 2), at this time, the first heat exchange coil 121 serves as an evaporator, and the second heat exchange coil 124 serves as a condenser, so that the second heat exchange coil 124 can defrost itself. Because the reverse circulation of the second refrigerant circulation loop 12 does not affect the heat exchange effect of the indoor unit, after defrosting is finished, if the second heat exchange coil 124 is frosted, the frost condensed on the second heat exchange coil 124 can be directly eliminated by controlling the reverse circulation of the second refrigerant circulation loop 12, so that the heat exchange efficiency of the indoor unit can be effectively ensured while the defrosting effect is ensured.
In addition, aiming at the problem that the control device 14 is easy to be damaged due to high temperature, the invention also provides the following control modes:
in the case where the first refrigerant circulation circuit 11 performs a refrigeration cycle, the controller may acquire the temperature of the environment where the outdoor unit is located, and may acquire the temperature through its own temperature sensor or may acquire the temperature through a network. Under the working condition of high-temperature refrigeration, the operation load of the whole air conditioner is influenced by the temperature of the outdoor environment, and the control device 14 is also in the outdoor environment, so that under the condition, the temperature reduction requirement of the control device 14 is judged according to the temperature of the environment where the outdoor unit is located, and the judgment accuracy is effectively ensured. Then, the controller controls the operation state of the second refrigerant circulation circuit 12 according to the temperature of the environment where the outdoor unit is located. Specifically, if the temperature of the environment in which the outdoor unit is located is higher than the first preset temperature, the controller controls the second refrigerant circulation circuit 12 to perform a refrigeration cycle (as shown in fig. 3), that is, the high-temperature gaseous refrigerant discharged from the second compressor 123 passes through the second four-way valve 122 and enters the second heat exchange coil 124 (as shown in the path of the dotted line in fig. 3), at this time, the first heat exchange coil 121 serves as an evaporator, and the second heat exchange coil 124 serves as a condenser. In this case, the second refrigerant circulation circuit 12 not only can exert a cooling effect on the control device 14, thereby effectively protecting the safety of the controller, but also the first heat exchange coil 121 can perform a cooling process on the refrigerant in the first refrigerant circulation circuit 11 through the shell-and-tube heat exchanger 13, so that the degree of supercooling of the refrigerant is further increased, thereby effectively increasing the cooling capacity. It should be noted that a technician can set a specific value of the first preset temperature according to an actual use requirement, and can determine that the control device 14 has a cooling requirement as long as the temperature of the environment where the outdoor unit is located is greater than the first preset temperature; preferably, the first preset temperature is set to 40 ℃.
In the case where the first refrigerant circulation circuit 11 performs a heating cycle and the outdoor coil 114 does not frost, it can be understood that when the outdoor coil 114 frosts, the internal temperature of the outdoor unit is low, and the control device 14 usually does not overheat; the outdoor temperature is low, so the controller directly obtains the temperature of the control device 14 to judge whether the control device is overheated or not, so that the accuracy of judgment is effectively ensured. Then, the controller controls the operation state of the second refrigerant circulation circuit 12 according to the temperature of the control device 14. Specifically, if the temperature of the control device 14 is higher than the second preset temperature, the controller controls the second refrigerant circulation circuit 12 to perform a heating cycle (as shown in fig. 1), that is, the high-temperature gaseous refrigerant discharged from the second compressor 123 enters the first heat exchange coil 121 through the second four-way valve 122 (as shown in the path of the dotted line in fig. 1), at this time, the first heat exchange coil 121 serves as a condenser, and the second heat exchange coil 124 serves as an evaporator. In this case, the second refrigerant circulation circuit 12 not only can perform a cooling effect on the control device 14, so as to effectively protect the safety of the controller, but also the first heat exchange coil 121 can perform a heating process on the refrigerant before flowing into the outdoor coil 114 through the shell-and-tube heat exchanger 13, so as to effectively prevent the outdoor coil 114 from frosting. It should be noted that, a technician may set a specific value of the second preset temperature according to an actual use requirement, and as long as the temperature of the control device 14 is greater than the second preset temperature, it may be determined that the control device 14 has a cooling requirement.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent that the scope of the present invention is not limited to these specific embodiments, as will be readily understood by those skilled in the art. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A double-compressor air conditioner is characterized in that the double-compressor air conditioner comprises an indoor unit and an outdoor unit,
a first refrigerant circulation loop is arranged between the indoor unit and the outdoor unit,
an indoor coil pipe, a first compressor, an outdoor coil pipe and a first throttling component are sequentially arranged on the first refrigerant circulating loop, the indoor coil pipe is arranged in the indoor unit, the outdoor coil pipe is arranged in the outdoor unit,
the outdoor unit is also provided with a second refrigerant circulating loop,
the first heat exchange coil can exchange heat with at least one part of the first refrigerant circulation loop between the first throttling component and the outdoor coil, so that the refrigerant can enter the outdoor coil after being subjected to temperature rise treatment.
2. The dual compressor air conditioner of claim 1, further comprising a shell and tube heat exchanger,
the first heat exchange coil exchanges heat with at least one part of the first refrigerant circulation loop between the first throttling component and the outdoor coil through the shell-and-tube heat exchanger.
3. The dual compressor air conditioner of claim 2, wherein the shell-and-tube heat exchanger includes a shell formed with a heat exchange cavity and a heat exchange tube disposed in the heat exchange cavity,
the first heat exchange coil is communicated with the heat exchange tube, and at least one part of the first refrigerant circulation loop between the first throttling component and the outdoor coil is communicated with the heat exchange cavity.
4. The dual compressor air conditioner of claim 2, wherein the shell-and-tube heat exchanger includes a shell, a first heat exchange tube and a second heat exchange tube, the shell being formed with a heat exchange cavity, the first heat exchange tube and the second heat exchange tube being disposed in the heat exchange cavity,
the first heat exchange coil is communicated with the first heat exchange tube, and at least one part of the first refrigerant circulation loop between the first throttling component and the outdoor coil is communicated with the second heat exchange tube.
5. The dual compressor air conditioner of claim 4, wherein the heat exchange chamber is filled with a heat exchange medium.
6. The dual compressor air conditioner of claim 1, wherein the second heat exchanging coil is disposed proximate the outdoor coil.
7. The dual compressor air conditioner of any one of claims 1 to 6, wherein at least a portion of the air intake section of the second compressor is disposed near a control device of the outdoor unit.
8. The dual compressor air conditioner of claim 7, wherein the control means includes a heat sink, at least a portion of the air intake section of the second compressor being disposed proximate the heat sink.
9. The dual compressor air conditioner of claim 8, wherein at least a portion of the air intake section of the second compressor is disposed in a curved configuration, and the curved portion of the air intake section of the second compressor is disposed proximate the heat sink.
10. The dual compressor air conditioner of any one of claims 1 to 6, wherein the first throttle member and/or the second throttle member is an electronic expansion valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110468663.6A CN113251474A (en) | 2021-04-28 | 2021-04-28 | Air conditioner with double compressors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110468663.6A CN113251474A (en) | 2021-04-28 | 2021-04-28 | Air conditioner with double compressors |
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| CN113251474A true CN113251474A (en) | 2021-08-13 |
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| CN202110468663.6A Pending CN113251474A (en) | 2021-04-28 | 2021-04-28 | Air conditioner with double compressors |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022227567A1 (en) * | 2021-04-28 | 2022-11-03 | 青岛海尔空调器有限总公司 | Control method for dual compressor air conditioner |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012139429A1 (en) * | 2011-04-12 | 2012-10-18 | 海信科龙电器股份有限公司 | Defrosting and frequency variable heat pump/air conditioning apparatus |
| CN203375604U (en) * | 2013-06-28 | 2014-01-01 | 美的集团股份有限公司 | Heat pump air conditioner system |
| CN205137703U (en) * | 2015-11-17 | 2016-04-06 | 广东美的暖通设备有限公司 | Air -conditioner |
| CN106885404A (en) * | 2017-01-09 | 2017-06-23 | 美的集团股份有限公司 | The heating and defrosting system and method and heat pump air conditioner of a kind of heat pump air conditioner |
| CN108302839A (en) * | 2017-12-29 | 2018-07-20 | 青岛海尔空调器有限总公司 | Air-conditioner system |
| CN108931039A (en) * | 2018-08-23 | 2018-12-04 | 珠海格力电器股份有限公司 | A kind of air conditioner control system and air regulator |
| CN109974325A (en) * | 2019-03-07 | 2019-07-05 | 海信家电集团股份有限公司 | A kind of air-conditioning system and its control method and device, air conditioner |
| CN211526555U (en) * | 2019-11-29 | 2020-09-18 | 青岛海尔空调电子有限公司 | Air conditioning unit with double-pipe heat exchanger |
-
2021
- 2021-04-28 CN CN202110468663.6A patent/CN113251474A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012139429A1 (en) * | 2011-04-12 | 2012-10-18 | 海信科龙电器股份有限公司 | Defrosting and frequency variable heat pump/air conditioning apparatus |
| CN203375604U (en) * | 2013-06-28 | 2014-01-01 | 美的集团股份有限公司 | Heat pump air conditioner system |
| CN205137703U (en) * | 2015-11-17 | 2016-04-06 | 广东美的暖通设备有限公司 | Air -conditioner |
| CN106885404A (en) * | 2017-01-09 | 2017-06-23 | 美的集团股份有限公司 | The heating and defrosting system and method and heat pump air conditioner of a kind of heat pump air conditioner |
| CN108302839A (en) * | 2017-12-29 | 2018-07-20 | 青岛海尔空调器有限总公司 | Air-conditioner system |
| CN108931039A (en) * | 2018-08-23 | 2018-12-04 | 珠海格力电器股份有限公司 | A kind of air conditioner control system and air regulator |
| CN109974325A (en) * | 2019-03-07 | 2019-07-05 | 海信家电集团股份有限公司 | A kind of air-conditioning system and its control method and device, air conditioner |
| CN211526555U (en) * | 2019-11-29 | 2020-09-18 | 青岛海尔空调电子有限公司 | Air conditioning unit with double-pipe heat exchanger |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022227567A1 (en) * | 2021-04-28 | 2022-11-03 | 青岛海尔空调器有限总公司 | Control method for dual compressor air conditioner |
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