CN107477682B - Air conditioning system, indoor unit and control method thereof - Google Patents
Air conditioning system, indoor unit and control method thereof Download PDFInfo
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- CN107477682B CN107477682B CN201710751892.2A CN201710751892A CN107477682B CN 107477682 B CN107477682 B CN 107477682B CN 201710751892 A CN201710751892 A CN 201710751892A CN 107477682 B CN107477682 B CN 107477682B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000004378 air conditioning Methods 0.000 title claims abstract description 25
- 238000007791 dehumidification Methods 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 17
- 238000010257 thawing Methods 0.000 claims description 16
- 238000004590 computer program Methods 0.000 claims description 4
- 239000003507 refrigerant Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 12
- 230000006870 function Effects 0.000 description 12
- 238000005057 refrigeration Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 238000004883 computer application Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0234—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in series arrangements
- F25B2313/02342—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in series arrangements during 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2501—Bypass valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning system, an indoor unit and a control method thereof, wherein the air conditioning system comprises an outdoor unit, the indoor unit and a controller, wherein the outdoor unit comprises a compressor, a four-way valve and an outdoor heat exchanger; the indoor unit comprises an indoor main heat exchanger, an indoor auxiliary heat exchanger, a control switch and a throttling device, wherein one end of the indoor auxiliary heat exchanger is connected with the other end of the outdoor heat exchanger, the other end of the indoor auxiliary heat exchanger is connected with one end of the throttling device, the other end of the throttling device is connected with one end of the indoor main heat exchanger, the other end of the indoor main heat exchanger is connected with a fourth valve port of the four-way valve, one end of the control switch is connected with one end of the indoor auxiliary heat exchanger, and the other end of the control switch is connected with the other end of the; the controller controls the control switch according to the operation mode, wherein the control switch is controlled to be closed in the dehumidification mode. Can stabilize indoor temperature when the dehumidification mode of operation, avoid indoor temperature to reduce gradually and influence the travelling comfort.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioning system, an indoor unit and a control method of the indoor unit.
Background
When a traditional air conditioner indoor unit operates in a dehumidification mode, an indoor heat exchanger is used as an evaporator to absorb indoor heat, so that the indoor temperature is gradually reduced, and the comfort is reduced.
In some related technologies, an air conditioner with a constant temperature dehumidification function is divided into two parts by using an indoor unit, wherein one part of heat exchangers are used for refrigeration and dehumidification, and the other part of heat exchangers serve as condensers for heating.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the present invention needs to provide an air conditioning system, which can ensure stable indoor temperature and comfort during dehumidification. The invention also provides an indoor unit and a control method thereof.
In order to solve the above problem, an air conditioning system according to a first embodiment of the present invention includes: the outdoor unit comprises a compressor, a four-way valve and an outdoor heat exchanger, wherein a first valve port of the four-way valve is connected with an air outlet of the compressor, a second valve port of the four-way valve is connected with one end of the outdoor heat exchanger, and a third valve port of the four-way valve is connected with a return air port of the compressor; the indoor unit comprises an indoor main heat exchanger, an indoor auxiliary heat exchanger, a control switch and a throttling device, wherein one end of the indoor auxiliary heat exchanger is connected with the other end of the outdoor heat exchanger, the other end of the indoor auxiliary heat exchanger is connected with one end of the throttling device, the other end of the throttling device is connected with one end of the indoor main heat exchanger, the other end of the indoor main heat exchanger is connected with a fourth valve port of the four-way valve, one end of the control switch is connected with one end of the indoor auxiliary heat exchanger, and the other end of the control switch is connected with the other end of the indoor auxiliary heat exchanger; and the controller controls the control switch according to an operation mode, wherein the control switch is controlled to be closed in a dehumidification mode.
According to the air conditioning system provided by the embodiment of the invention, the independent indoor main heat exchanger and the independent indoor auxiliary heat exchanger are arranged, and the controller controls the control switch to be closed in the dehumidification mode, so that the indoor auxiliary heat exchanger participates in refrigerant circulation, and the indoor main heat exchanger is used for carrying out evaporation and heat absorption and the indoor auxiliary heat exchanger is used for carrying out condensation and heat release in the room, so that the indoor temperature can be stabilized during dehumidification operation, and the phenomenon that the comfort is influenced by temperature reduction is avoided.
In some embodiments of the present invention, for a multi-split air-conditioning system, the controller, in the heating and defrosting mode, obtains a ratio of a sum of capacities of the indoor units in the operating state to a total capacity of the indoor units, and when the ratio is smaller than a preset ratio, controls a control switch of the indoor unit in the operating state to be turned off, and controls a control switch of the indoor unit in the non-operating state to be turned on; or when the proportion is larger than or equal to the preset proportion, controlling the control switches of all the indoor units to be opened. The indoor temperature of the indoor unit in the running state can be guaranteed to be stable during defrosting operation, and the phenomenon that the comfort is affected due to the fact that the indoor temperature is gradually reduced in the defrosting process is avoided.
In some embodiments of the present invention, the indoor auxiliary heat exchanger has a capillary tube assembly, and the controller controls the control switch to be turned on in the cooling mode or the heating mode, so as to ensure a normal cooling or heating effect.
In some embodiments of the present invention, the indoor main heat exchanger includes a first heat exchanging portion and a second heat exchanging portion, and the first heat exchanging portion, the second heat exchanging portion and the indoor auxiliary heat exchanger are arranged in a triangle, wherein the indoor auxiliary heat exchanger is located on the air outlet side and forms a bottom side of the triangle, and the first heat exchanging portion and the second heat exchanging portion are arranged at a predetermined angle toward the air outlet direction to form a vertex angle of the triangle.
In some embodiments of the present invention, the fin pitch of the fins of the indoor auxiliary heat exchanger is greater than the fin pitch of the fins of the indoor main heat exchanger, so that wind resistance can be reduced.
In order to solve the above problem, an indoor unit according to a second aspect of the present invention includes: the indoor heat exchanger comprises an indoor main heat exchanger, an indoor auxiliary heat exchanger, a control switch and a throttling device; one end of the indoor auxiliary heat exchanger is connected with one end of the outdoor unit, the other end of the indoor auxiliary heat exchanger is connected with one end of the throttling device, the other end of the throttling device is connected with one end of the indoor main heat exchanger, the other end of the indoor main heat exchanger is connected with the other end of the outdoor unit, one end of the control switch is connected with one end of the indoor auxiliary heat exchanger, and the other end of the control switch is connected with the other end of the indoor auxiliary heat exchanger.
According to the indoor unit provided by the embodiment of the invention, the indoor main heat exchanger and the indoor auxiliary heat exchanger are arranged, and the on-off state of the control switch can be switched to switch whether the indoor auxiliary heat exchanger participates in refrigerant circulation, so that a hardware basis is provided for dehumidification constant temperature control.
In some embodiments of the present invention, the indoor main heat exchanger includes a first heat exchanging portion and a second heat exchanging portion, and the first heat exchanging portion, the second heat exchanging portion and the indoor auxiliary heat exchanger are arranged in a triangle, wherein the indoor auxiliary heat exchanger is located on the air outlet side and forms a bottom side of the triangle, and the first heat exchanging portion and the second heat exchanging portion are arranged at a predetermined angle toward the air outlet direction to form a vertex angle of the triangle.
In some embodiments of the present invention, the fin pitch of the fins of the indoor auxiliary heat exchanger is greater than the fin pitch of the fins of the indoor main heat exchanger, so that wind resistance can be reduced.
In order to solve the above problems, in an embodiment of the third aspect of the present invention, the indoor unit includes an indoor main heat exchanger, an indoor auxiliary heat exchanger, a control switch, and a throttling device, where one end of the indoor auxiliary heat exchanger is connected to one end of an outdoor unit, the other end of the indoor auxiliary heat exchanger is connected to one end of the throttling device, the other end of the throttling device is connected to one end of the indoor main heat exchanger, the other end of the indoor main heat exchanger is connected to the other end of the outdoor unit, one end of the control switch is connected to one end of the indoor auxiliary heat exchanger, and the other end of the control switch is connected to the other end of the indoor auxiliary heat exchanger; the control method comprises the following steps: determining a selected operating mode; and controlling the control switch according to the operation mode, wherein when the dehumidification mode is selected, the control switch is controlled to be closed.
According to the indoor unit control method, the indoor main heat exchanger and the indoor auxiliary heat exchanger are arranged on the basis of the indoor unit, the control switch is controlled to be closed when the dehumidification mode is performed, so that the indoor auxiliary heat exchanger participates in refrigerant circulation, evaporation and heat absorption are performed through the indoor main heat exchanger, condensation and heat release of the indoor auxiliary heat exchanger are performed indoors, the indoor temperature can be stabilized when dehumidification is performed, and the phenomenon that comfort is affected due to temperature reduction is avoided.
In some embodiments of the present invention, for a multi-split air conditioning system, when a heating and defrosting mode is selected, a ratio of a sum of capacities of indoor units in an operating state to a total capacity of the indoor units is obtained; when the proportion is smaller than a preset proportion, controlling a control switch of the indoor unit in the running state to be closed, and controlling a control switch of the indoor unit in the non-running state to be opened; or when the proportion is larger than or equal to the preset proportion, controlling the control switches of all the indoor units to be opened. The indoor temperature of the indoor unit in the running state can be guaranteed to be stable during defrosting operation, and the phenomenon that the comfort is affected due to the fact that the indoor temperature is gradually reduced in the defrosting process is avoided.
In some embodiments of the present invention, the indoor auxiliary heat exchanger has a capillary tube assembly, and the control method further includes:
when the refrigeration mode or the heating mode is selected, the control switch is controlled to be turned on, and the normal refrigeration or heating effect can be ensured.
In some embodiments of the present invention, a computer-readable storage medium is further provided, on which a computer program is stored, which when executed by a processor implements the indoor unit control method.
In some embodiments of the present invention, a computer application is further provided, which, when executed on a processor of a computer device, executes the indoor unit control method.
Drawings
FIG. 1 is a block diagram of an air conditioning system according to an embodiment of the present invention;
fig. 2 is a schematic view of the structural arrangement of an indoor unit according to an embodiment of the present invention;
fig. 3 is a block diagram of an indoor unit according to an embodiment of the present invention;
fig. 4 is a flowchart of an indoor unit control method according to an embodiment of the present invention.
Reference numerals:
an air conditioning system 100;
the system comprises a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, an indoor main heat exchanger 21, an indoor auxiliary heat exchanger 22, a control switch 23, a throttling device 24, an indoor fan 25 and a water pan 26;
a first heat exchanging part 211 and a second heat exchanging part 212.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An air conditioning system according to an embodiment of the present invention is described below with reference to the accompanying drawings.
Fig. 1 is a block diagram of an air conditioning system according to an embodiment of the present invention, and as shown in fig. 1, the air conditioning system 100 includes an outdoor unit 10, an indoor unit 20, and a controller (not shown).
The outdoor unit 10 includes a compressor 11, a four-way valve 12, and an outdoor heat exchanger 13, and may also include other pipes or components such as a gas-liquid separator, wherein a first port a of the four-way valve 12 is connected to an air outlet of the compressor 11, a second port D of the four-way valve 12 is connected to one end of the outdoor heat exchanger 13, and a third port C of the four-way valve 12 is connected to a return air inlet of the compressor 11.
The indoor unit 20 includes an indoor main heat exchanger 21, an indoor auxiliary heat exchanger 22, a control switch 23, and a throttling device 24, wherein one end of the indoor auxiliary heat exchanger 22 is connected to the other end of the outdoor heat exchanger 13, the other end of the indoor auxiliary heat exchanger 22 is connected to one end of the throttling device 24, the other end of the throttling device 24 is connected to one end of the indoor main heat exchanger 21, the other end of the indoor main heat exchanger 21 is connected to the fourth valve port B of the four-way valve 12, one end of the control switch 23 is connected to one end of the indoor auxiliary heat exchanger 22, and the other end of the control switch 23 is connected to the other end of the indoor auxiliary heat.
The controller 30 controls the control switch 23 according to an operation mode, wherein the control switch 23 is controlled to be turned off in a dehumidification mode.
Specifically, in the dehumidification mode, the compressor 11 outputs a high-temperature and high-pressure refrigerant, the refrigerant is output to the outdoor heat exchanger 13 through the four-way valve 12 to be condensed and released heat, the low-temperature and high-pressure refrigerant enters the indoor unit 20, the control switch 23 is turned off, the refrigerant is condensed and released heat through the indoor auxiliary heat exchanger 22, throttled by the throttling device 24 to become a low-temperature and low-pressure refrigerant, evaporated and refrigerated through the indoor main heat exchanger 21, and finally returned to the compressor 11 through the four-way valve, and the operation is repeated. It can be seen that, based on the structure of the indoor unit 20 of the embodiment of the present invention, when the dehumidification mode is operated, the indoor auxiliary heat exchanger 22 condenses to release heat, and the indoor main heat exchanger 21 evaporates to cool, so as to balance the indoor temperature, meet the requirement of no cooling during dehumidification, and avoid the indoor comfort from being affected by the lower indoor temperature during dehumidification operation.
In the related art, in the manner of dividing the indoor heat exchanger into a part of evaporation and a condensation, and reducing the effect during normal cooling or heating, the air conditioning system 100 according to the embodiment of the present invention is based on the above-mentioned structure of the indoor unit 20, wherein the indoor auxiliary heat exchanger 22 has a capillary tube assembly, and the controller 30 controls the control switch 23 to be turned on to bypass to perform cooling or heating during the cooling mode or the heating mode, so as to ensure the cooling or heating effect.
Specifically, in the normal refrigeration mode, the controller 30 controls the control switch 23 to be turned on, the indoor auxiliary heat exchanger 22 has a capillary tube assembly, and the refrigerant has a large flow resistance, so that when the control switch 23 is turned on, the indoor auxiliary heat exchanger 22 does not substantially pass through the refrigerant, and the refrigerant enters the indoor unit 20, flows through the pipeline of the control switch 23, is throttled and depressurized by the throttling device 24, such as an electronic expansion valve, and is evaporated, absorbed and cooled by the indoor main heat exchanger 21, thereby achieving the refrigeration effect. It can be seen that in the cooling mode, the indoor auxiliary heat exchanger 22 does not function, and the cooling effect is not affected similarly to the cooling process of the conventional air conditioner.
Similarly, in the normal heating mode, the controller 30 controls the control switch 23 to be turned on, since the indoor auxiliary heat exchanger 22 has the capillary tube assembly, the refrigerant flow resistance is large, and when the control switch 23 is turned on, the refrigerant does not substantially pass through the indoor auxiliary heat exchanger 22. The high-temperature and high-pressure refrigerant output by the compressor 11 enters the indoor unit 20, flows through the indoor main heat exchanger 21 to be condensed and release heat, is throttled and depressurized by the throttling device 24 to be changed into a low-temperature and low-pressure refrigerant, is distributed with the refrigerant quantity of each indoor unit, is output to the outdoor heat exchanger 13 through the pipeline of the control switch 23 to be evaporated and absorb heat, and finally flows back to the compressor 11 through the four-way valve 12, and the heating is realized in such a circulating way. It can be seen that in the cooling mode, the indoor auxiliary heat exchanger 22 does not function, and the heating effect is not affected similarly to the heating process of the existing air conditioner.
In addition, in some related arts, if the outdoor heat exchanger 13 needs to be defrosted for heating operation, the indoor heat exchanger also serves as an evaporator to absorb indoor heat, and thus, the indoor temperature is lowered during defrosting, which affects comfort. In the embodiment of the present invention, based on the indoor unit 20 provided with the indoor main heat exchanger 21 and the indoor auxiliary heat exchanger 22, it is possible to ensure that the indoor temperature of the indoor unit 20 in the operating state is constant during defrosting operation, and comfort is ensured.
In some embodiments of the present invention, for the multi-split air-conditioning system, in the heating and defrosting mode, the controller 30 obtains the ratio of the sum of the capacities of the indoor units in the operating state to the total indoor unit capacity, and when the ratio of the sum of the capacities of the operating indoor units to the total indoor unit capacity is smaller than a preset ratio, for example, 50%, the control switch 23 of the indoor unit 20 in the operating state is turned off, at this time, both the condensation heat release temperature rise and the evaporation heat absorption temperature fall of the indoor main heat exchanger 21 of the indoor unit 20 in the operating state are performed, so as to stabilize the indoor temperature as much as possible, defrost the outdoor heat exchanger 11 can be realized, and the control switch of the indoor unit in the non-operating state is turned on, that is, normal heating and defrost can be performed in a room without air-conditioning effect, at this time, the refrigerant bypasses the pipeline through the control switch 23, even if the indoor main heat exchanger 21 is used as an evaporator to absorb indoor heat, the comfort problem is not influenced, and the indoor auxiliary heat exchanger 22 does not act; or when the ratio of the sum of the capacities of the running indoor units to the total indoor unit capacity is greater than or equal to the preset ratio, the control switches 23 of all the indoor units are controlled to be opened, the indoor units are bypassed through the control switches 23, and then evaporated, absorbed and cooled through the indoor main heat exchanger 21, so that the outdoor defrosting function is realized.
In some embodiments of the present invention, as shown in fig. 2, the indoor main heat exchanger 21 includes a first heat exchanging portion 211 and a second heat exchanging portion 212, and the first heat exchanging portion 211, the second heat exchanging portion 212 and the indoor auxiliary heat exchanger 22 are arranged in a triangle, wherein the indoor auxiliary heat exchanger 22 is located on the air outlet side and forms a bottom edge of the triangle as a function of re-condensing heat release to raise the temperature, and the first heat exchanging portion 211 and the second heat exchanging portion 212 are arranged at a predetermined angle toward the air outlet direction to form a vertex angle of the triangle, so as to ensure that the air flows along the air flow direction in the unit first pass through the indoor main heat exchanger 21 and then pass through the indoor auxiliary heat exchanger 22 releasing heat, which is more energy-saving and has better effect. Fig. 2 also includes an indoor fan 25 and a water pan 26. It should be noted that this embodiment is only one implementation form of the indoor heat exchanger, and of course, other modifications or alternative forms based on this embodiment may also be adopted.
In some embodiments of the present invention, the fin pitch of the fins of the indoor auxiliary heat exchanger 22 is greater than the fin pitch of the fins of the indoor main heat exchanger 21, for example, the fin pitch of the indoor auxiliary heat exchanger 22 is 2.0 mm, which can reduce wind resistance.
In summary, in the air conditioning system 100 according to the embodiment of the present invention, by providing the indoor main heat exchanger 21 and the indoor auxiliary heat exchanger 22, in the dehumidification mode, the controller 30 controls the control switch 23 to be turned off, so that the indoor auxiliary heat exchanger 22 is connected to the refrigerant cycle, and the indoor main heat exchanger 21 performs evaporation heat absorption and the indoor auxiliary heat exchanger 22 performs condensation heat release indoors, so that the indoor temperature can be stabilized during dehumidification operation, and the comfort is prevented from being affected by temperature reduction. And, when normal refrigeration or heating, the control switch 23 is turned on, the indoor auxiliary heat exchanger 22 does not participate in indoor heat exchange, ensuring the effect of refrigeration or heating; when heating and defrosting, the indoor temperature of the indoor unit in the running state can be ensured to be stable, and the requirement of comfort is met. In addition, the indoor auxiliary heat exchanger 22 is arranged at the air outlet direction side of the indoor main heat exchanger 21, so that energy can be saved, and the effect is better.
An indoor unit according to an embodiment of a second aspect of the present invention will be described with reference to the accompanying drawings.
Fig. 3 is a block diagram of an indoor unit according to an embodiment of the present invention, and as shown in fig. 3, the indoor unit 20 according to an embodiment of the present invention includes an indoor main heat exchanger 21, an indoor auxiliary heat exchanger 22, a control switch 23, and a throttling device 24.
One end of the indoor auxiliary heat exchanger 22 is connected to one end of the outdoor unit, the other end of the indoor auxiliary heat exchanger 22 is connected to one end of the throttling device 24, the other end of the throttling device 24 is connected to one end of the indoor main heat exchanger 21, the other end of the indoor main heat exchanger 21 is connected to the other end of the outdoor unit, one end of the control switch 23 is connected to one end of the indoor auxiliary heat exchanger 22, and the other end of the control switch 23 is connected to the other end of the indoor auxiliary heat exchanger 22.
In the indoor unit 20 of the embodiment of the present invention, the indoor main heat exchanger 21 and the indoor auxiliary heat exchanger 22 are provided, and the on-off state of the control switch 23 can switch whether the indoor auxiliary heat exchanger 22 participates in the refrigerant circulation, so as to provide a hardware basis for dehumidification thermostatic control.
In some embodiments of the present invention, referring to fig. 2, the indoor main heat exchanger 21 includes a first heat exchanging portion 211 and a second heat exchanging portion 212, and the first heat exchanging portion 211, the second heat exchanging portion 212 and the indoor auxiliary heat exchanger 22 are arranged in a triangle, wherein the indoor auxiliary heat exchanger 22 is located on the air outlet side and forms a bottom edge of the triangle as a function of re-condensing heat release to raise the temperature, and the first heat exchanging portion 211 and the second heat exchanging portion 212 are arranged at a predetermined angle toward the air outlet direction to form a vertex angle of the triangle, so as to ensure that the air flows along the air flow direction in the unit first pass through the indoor main heat exchanger 21 and then pass through the indoor auxiliary heat exchanger 22 releasing heat, which is more energy-saving and has better effect. This embodiment is only one realization of the indoor heat exchanger, and of course, other variations or alternatives based on this embodiment may also be adopted.
In some embodiments of the present invention, the fin pitch of the fins of the indoor auxiliary heat exchanger 22 is greater than the fin pitch of the fins of the indoor main heat exchanger 21, for example, the fin pitch of the indoor auxiliary heat exchanger 22 is 2.0 mm, which can reduce wind resistance.
Based on the air conditioning system of the embodiment of the aspect described above, a control method of the indoor unit according to the embodiment of the third aspect of the present invention is described below with reference to the drawings. The indoor unit comprises an indoor main heat exchanger, an indoor auxiliary heat exchanger, a control switch and a throttling device, wherein one end of the indoor auxiliary heat exchanger is connected with one end of the outdoor unit, the other end of the indoor auxiliary heat exchanger is connected with one end of the throttling device, the other end of the throttling device is connected with one end of the indoor main heat exchanger, the other end of the indoor main heat exchanger is connected with the other end of the outdoor unit, one end of the control switch is connected with one end of the indoor auxiliary heat exchanger, and the other end of the control switch is connected with the other end of the indoor auxiliary heat exchanger.
Fig. 4 is a flowchart of an indoor unit control method according to an embodiment of the present invention, and as shown in fig. 4, the control method according to the embodiment of the present invention includes:
s1, determining the selected operation mode.
In some embodiments of the invention, the operating mode may be selected via a remote control or control panel. The operation modes may include a dehumidification mode, a defrost mode, a cooling or heating mode, and the like.
And S2, controlling the control switch according to the operation mode, wherein when the dehumidification mode is selected, the control switch is controlled to be closed.
Specifically, referring to fig. 1, when the dehumidification mode of operation, control switch closes, and then the refrigerant condenses through indoor supplementary heat exchanger again and is exothermic to throttle the step-down through throttling arrangement festival, evaporate the refrigeration through indoor main heat exchanger, thereby, can balance indoor temperature unchangeably, satisfy the requirement that the dehumidification was not cooled down, indoor temperature is more and more low and influence indoor travelling comfort when avoiding the dehumidification operation.
In some embodiments of the present invention, for a multi-split air conditioning system, when a heating and defrosting mode is selected, a ratio of a sum of capacities of indoor units in an operating state to a total capacity of the indoor units is obtained; when the proportion is smaller than the preset proportion, the control switch of the indoor unit in the running state is controlled to be turned off, and the control switch of the indoor unit in the non-running state is controlled to be turned on, so that the indoor temperature of the indoor unit in the running state is constant during heating and defrosting, and the requirement on comfort is met. Or when the proportion is larger than or equal to the preset proportion, the control switches of all the indoor units are controlled to be opened, bypass is carried out through the control switch pipelines, and the indoor main heat exchanger evaporates, absorbs heat and cools to achieve the outdoor defrosting function.
In some embodiments of the present invention, the indoor auxiliary heat exchanger has a capillary tube assembly, and when the cooling mode or the heating mode is selected, the control switch is turned on, and the indoor auxiliary heat exchanger does not participate in refrigerant circulation, thereby achieving normal cooling or heating operation similar to cooling or heating in the prior art.
In some embodiments of the present invention, a computer-readable storage medium is further provided, on which a computer program is stored, and the computer program, when executed by a processor, implements the indoor unit control method of the above-described aspect embodiments.
In some embodiments of the present invention, a computer application is further provided, which, when executed on a processor of a computer device, performs the indoor unit control method of the above aspect of embodiments.
It should be noted that in the description of this specification, any process or method description in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. An air conditioning system, comprising:
the outdoor unit comprises a compressor, a four-way valve and an outdoor heat exchanger, wherein a first valve port of the four-way valve is connected with an air outlet of the compressor, a second valve port of the four-way valve is connected with one end of the outdoor heat exchanger, and a third valve port of the four-way valve is connected with a return air port of the compressor;
the indoor unit comprises an indoor main heat exchanger, an indoor auxiliary heat exchanger, a control switch and a throttling device, wherein one end of the indoor auxiliary heat exchanger is connected with the other end of the outdoor heat exchanger, the other end of the indoor auxiliary heat exchanger is connected with one end of the throttling device, the other end of the throttling device is connected with one end of the indoor main heat exchanger, the other end of the indoor main heat exchanger is connected with a fourth valve port of the four-way valve, one end of the control switch is connected with one end of the indoor auxiliary heat exchanger, and the other end of the control switch is connected with the other end of the indoor auxiliary heat exchanger;
the controller controls the control switch according to an operation mode, wherein the control switch is controlled to be closed in a dehumidification mode;
for the multi-split system, the controller acquires the proportion of the sum of the capacities of the indoor units in the running state to the total capacity of the indoor units in the heating defrosting mode, controls a control switch of the indoor unit in the running state to be closed when the proportion is smaller than a preset proportion, and controls a control switch of the indoor unit in the non-running state to be opened; or when the proportion is larger than or equal to the preset proportion, controlling the control switches of all the indoor units to be opened.
2. The air conditioning system as claimed in claim 1, wherein the indoor auxiliary heat exchanger has a capillary tube assembly, and the controller controls the control switch to be turned on in a cooling mode or a heating mode.
3. The air conditioning system according to claim 1, wherein the indoor main heat exchanger includes a first heat exchanging portion and a second heat exchanging portion, and the first heat exchanging portion, the second heat exchanging portion and the indoor auxiliary heat exchanger are arranged in a triangle, wherein the indoor auxiliary heat exchanger is located on an air outlet side and forms a bottom side of the triangle, and the first heat exchanging portion and the second heat exchanging portion are arranged at a predetermined angle toward an air outlet direction to form a vertex angle of the triangle.
4. The air conditioning system as claimed in claim 3, wherein a fin pitch of the indoor secondary heat exchanger is greater than a fin pitch of the indoor primary heat exchanger.
5. The indoor unit control method is characterized in that the indoor unit comprises an indoor main heat exchanger, an indoor auxiliary heat exchanger, a control switch and a throttling device, wherein one end of the indoor auxiliary heat exchanger is connected with one end of an outdoor unit, the other end of the indoor auxiliary heat exchanger is connected with one end of the throttling device, the other end of the throttling device is connected with one end of the indoor main heat exchanger, the other end of the indoor main heat exchanger is connected with the other end of the outdoor unit, one end of the control switch is connected with one end of the indoor auxiliary heat exchanger, and the other end of the control switch is connected with the other end of the indoor auxiliary heat exchanger; the control method comprises the following steps:
determining a selected operating mode;
controlling the control switch according to the operation mode, wherein when the dehumidification mode is selected, the control switch is controlled to be closed, for the multi-split air conditioner system, when the heating and defrosting mode is selected, the proportion of the sum of the capacities of the indoor units in the operation state to the total capacity of the indoor units is obtained, when the proportion is smaller than the preset proportion, the control switch of the indoor unit in the operation state is controlled to be closed, and the control switch of the indoor unit in the non-operation state is controlled to be opened; or when the proportion is larger than or equal to the preset proportion, controlling the control switches of all the indoor units to be opened.
6. The indoor unit control method of claim 5, wherein the indoor sub heat exchanger has a capillary tube assembly, the control method further comprising:
and when the cooling mode or the heating mode is selected, controlling the control switch to be turned on.
7. A computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the indoor unit control method according to any one of claims 5 and 6.
8. A computer application program which, when executed on a processor of a computer device, performs the indoor unit control method of any one of claims 5 and 6.
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| CN201710751892.2A CN107477682B (en) | 2017-08-28 | 2017-08-28 | Air conditioning system, indoor unit and control method thereof |
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| CN201710751892.2A CN107477682B (en) | 2017-08-28 | 2017-08-28 | Air conditioning system, indoor unit and control method thereof |
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| CN108426315B (en) * | 2018-05-18 | 2023-07-04 | 珠海格力电器股份有限公司 | Air conditioner wall mounted unit, air conditioner and air outlet control method of wall mounted unit |
| CN108758811B (en) * | 2018-06-05 | 2024-06-18 | 广东美的暖通设备有限公司 | Three-pipe air pipe type indoor unit and air pipe type air conditioner |
| CN109341054B (en) * | 2018-08-17 | 2024-04-09 | 珠海格力电器股份有限公司 | Heat exchanger assembly and air conditioner |
| CN109780746B (en) * | 2019-02-01 | 2021-07-20 | 叶向前 | Two-pipe temperature and humidity balance environment regulation control air conditioning system |
| CN112161324B (en) * | 2020-09-30 | 2022-08-02 | 苏州甘鲁机电科技有限公司 | Air conditioner |
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| JP4312894B2 (en) * | 1999-09-09 | 2009-08-12 | 東芝キヤリア株式会社 | Air conditioner indoor unit |
| JP2002130794A (en) * | 2000-10-20 | 2002-05-09 | Fujitsu General Ltd | Air conditioner |
| JP2003004335A (en) * | 2001-06-20 | 2003-01-08 | Fujitsu General Ltd | Air conditioner |
| CN103075768B (en) * | 2013-02-01 | 2016-01-27 | 海信（山东）空调有限公司 | Thermostatic and humidistatic air conditioning unit group and control method |
| CN104832997A (en) * | 2015-05-26 | 2015-08-12 | 珠海格力电器股份有限公司 | Air conditioning unit and indoor unit thereof |
| CN107014102A (en) * | 2017-06-12 | 2017-08-04 | 广东美的暖通设备有限公司 | Air conditioner and its control method, device and computer-readable recording medium |
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