CN114867969A - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN114867969A CN114867969A CN202080085312.0A CN202080085312A CN114867969A CN 114867969 A CN114867969 A CN 114867969A CN 202080085312 A CN202080085312 A CN 202080085312A CN 114867969 A CN114867969 A CN 114867969A
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- Prior art keywords
- heat exchanger
- air
- indoor
- ventilation
- heat exchangers
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- 230000001954 sterilising effect Effects 0.000 claims abstract description 19
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000009423 ventilation Methods 0.000 claims description 53
- 239000003507 refrigerant Substances 0.000 claims description 51
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims 2
- 239000003570 air Substances 0.000 description 149
- 238000005057 refrigeration Methods 0.000 description 9
- 239000012080 ambient air Substances 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
Images
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
- F24F1/0007—Indoor units, e.g. fan coil units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
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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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
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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
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
- F24F2013/225—Means for preventing condensation or evacuating condensate for evacuating condensate by evaporating the condensate in the cooling medium, e.g. in air flow from the condenser
-
- 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
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/228—Treatment of condensate, e.g. sterilising
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Air Conditioning Control Device (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Abstract
Provided is an air conditioner which can perform sterilization of a plurality of indoor heat exchangers in an indoor unit in which the plurality of indoor heat exchangers are arranged. The first heat exchanger (14A) and the second heat exchanger (14B) are caused to function as condensers, and condensate water adhering to the first heat exchanger (14A) and the second heat exchanger (14B) is heated to a predetermined temperature, thereby performing heat sterilization of the first heat exchanger (14A) and the second heat exchanger (14B).
Description
Technical Field
The present invention relates to an indoor unit of an air conditioner.
Background
Among air conditioners, there is a ceiling-embedded air conditioner (hereinafter, referred to as a ceiling-embedded air conditioner) in which an outdoor unit installed outdoors and an indoor unit installed indoors of the air conditioner are connected by a refrigerant pipe and installed as the indoor unit on the back side of the ceiling.
As a ceiling-embedded air conditioner for increasing a heat exchange capacity, patent document 1 shown in fig. 4 discloses an indoor unit of a ceiling-embedded air conditioner 100A, which includes, in a casing 10 having an air outlet 14b disposed on a front surface side and an air inlet 14a disposed on a rear surface side: a first heat exchanger 20A as an indoor heat exchanger disposed near the front side; a second heat exchanger 20B also serving as an indoor heat exchanger disposed near the back surface side; a sirocco fan 30 disposed between the first heat exchanger 20A and the second heat exchanger 20B; a drain pan 40 disposed below the first heat exchanger 20A and the second heat exchanger 20B, for collecting the condensed water adhering to the first heat exchanger 20A and the second heat exchanger 20B; and a blowout guide 50 that links the blowout air passage 33B and the air blowout port 14B to guide the air blown out from the blowout air passage 33B of the sirocco fan 30 to the air blowout port 14B, a first space S1 that opens the air intake port 14a is formed between the second heat exchanger 20B and the back panel 12, a third space S3 is formed between the first heat exchanger 20A and the front panel 11, and a second space S2 that links the first space S1 and the third space S3 is formed between the drain pan 40 and the bottom panel 14.
Further, when the air conditioner performs a cooling operation, the surroundings of the indoor heat exchanger are in a high-humidity state, and therefore, since bacteria (including mold species) grow and bad odor is generated, the inside of the indoor unit is cleaned using a known cleaning unit such as an ion generator.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2019-203629
Disclosure of Invention
Problems to be solved by the invention
In the case of an indoor unit having a structure in which a plurality of indoor heat exchangers are arranged, as in the ceiling-embedded air conditioner disclosed in patent document 1, there is a problem that sterilization of each of the plurality of indoor heat exchangers cannot be sufficiently performed even when an ion generating device or the like as a purifying means is used.
In view of the above problems, the present invention provides an air conditioner comprising: an outdoor unit having a compressor and a four-way valve; and an indoor unit that includes a plurality of indoor heat exchangers and an indoor unit fan, and is connected to the outdoor unit, wherein the air conditioner controls at least the compressor, the indoor unit fan, and the four-way valve so that the plurality of indoor heat exchangers function as an evaporator in a case of cooling and as a condenser in a case of heating, thereby adjusting the temperature of the room in which the indoor unit is installed.
Means for solving the problems
One embodiment of the present invention is an air conditioner including: an outdoor unit having a compressor and a four-way valve; and an indoor unit that includes a plurality of indoor heat exchangers and an indoor unit fan, and is connected to the outdoor unit, wherein the air conditioner controls at least the compressor, the indoor unit fan, and the four-way valve to adjust a temperature of a room in which the indoor unit is installed by causing the plurality of indoor heat exchangers to function as evaporators when cooling and to function as condensers when heating, and wherein the plurality of indoor heat exchangers are caused to function as condensers to heat condensed water adhering to the indoor heat exchangers to a predetermined temperature when the plurality of indoor heat exchangers function as evaporators, thereby performing heat sterilization of the plurality of indoor heat exchangers.
Another aspect of the present invention is an air conditioner, wherein the indoor unit includes: a frame body having an air inlet and an air outlet, and having a plurality of ventilation passages in parallel relation to each other between the air inlet and the air outlet; at least one indoor heat exchanger disposed in each of the ventilation passages; and the indoor unit fan configured to guide the air sucked from the air suction port to the air discharge port via each of the plurality of air flow paths, wherein a flow resistance of one of the air flow paths is larger than a flow resistance of the other air flow paths, and an amount of refrigerant flowing through one of the indoor heat exchangers disposed in the one air flow path is set to be smaller than an amount of refrigerant flowing through the other indoor heat exchangers disposed in the other air flow paths in accordance with a magnitude of the flow resistance.
Effects of the invention
According to the present invention, it is possible to provide an air conditioner capable of performing sterilization of a plurality of indoor heat exchangers by heating condensed water attached to the indoor heat exchangers to a predetermined temperature when the plurality of indoor heat exchangers function as condensers and performing heating sterilization of the plurality of indoor heat exchangers when the plurality of indoor heat exchangers function as evaporators.
According to the present invention, it is possible to provide an air conditioner in which the ventilation resistance of one of the ventilation paths is larger than the ventilation resistance of the other ventilation paths, and the amount of refrigerant flowing through one of the indoor heat exchangers disposed in the one ventilation path is set to be smaller than the amount of refrigerant flowing through the other indoor heat exchangers disposed in the other ventilation paths in accordance with the magnitude of the ventilation resistance, so that the temperature of one of the indoor heat exchangers and the temperatures of the other indoor heat exchangers can be heated without any difference, and therefore, the bacteria removal imbalance among the indoor heat exchangers can be suppressed.
Drawings
Fig. 1 is a refrigeration circuit diagram of an indoor conditioner.
Fig. 2 is an enlarged view of the indoor heat exchanger in the refrigeration circuit diagram.
Fig. 3 is a sectional view of the indoor unit.
Fig. 4 is a sectional view of an indoor unit of a conventional ceiling-embedded air conditioner.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, an air conditioner in which an indoor unit is connected to an outdoor unit, two indoor heat exchangers are disposed in the indoor unit, and cooling operation and heating operation can be performed will be described as an example. The present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the present invention.
Examples
Fig. 1 schematically shows a configuration of a refrigeration circuit of an air conditioner 11 according to an embodiment of the present invention. The air conditioner 11 includes an indoor unit 12 and an outdoor unit 13. The indoor unit 12 is installed in, for example, an indoor space in a building. The indoor unit 12 may be installed in a space corresponding to an indoor space. An indoor heat exchanger 14 as a heat exchanger is incorporated in the indoor unit 12. The outdoor unit 13 incorporates a compressor 15, an outdoor heat exchanger 16, an expansion valve 17, and a four-way valve 18. The indoor heat exchanger 14, the compressor 15, the outdoor heat exchanger 16, the expansion valve 17, and the four-way valve 18 form a refrigeration circuit 19. The outdoor unit 13 may be installed outdoors to be capable of heat exchange with outdoor air.
The refrigeration circuit 19 includes a first circulation path 21. The first circulation path 21 connects the first port 18a and the second port 18b of the four-way valve 18 to each other. A compressor 15 is provided in the first circulation path 21. A suction pipe 15a of the compressor 15 is connected to a first port 18a of the four-way valve 18 via a refrigerant pipe. The gas refrigerant is supplied from the first port 18a to the suction pipe 15a of the compressor 15. The compressor 15 compresses a low-pressure gas refrigerant to a given pressure. The discharge pipe 15b of the compressor 15 is connected to the second port 18b of the four-way valve 18 via a refrigerant pipe. The gas refrigerant is supplied from the discharge pipe 15b of the compressor 15 to the second port 18b of the four-way valve 18. The refrigerant pipe may be a copper pipe, for example.
Although the four-way valve 18 is used as a flow path switching valve, a plurality of solenoid valves may be combined without using the four-way valve 18.
The refrigeration circuit 19 further includes a second circulation path 22. The second circulation path 22 connects the third port 18c and the fourth port 18d of the four-way valve 18 to each other. In the second circulation path 22, the outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 are assembled in this order from the third port 18c side. The outdoor heat exchanger 16 exchanges heat energy between the passing refrigerant and the ambient air. The indoor heat exchanger 14 exchanges heat energy between the passing refrigerant and the ambient air.
In fig. 1, the indoor heat exchanger 14 is shown as 1, but as will be described later in the description of fig. 2, the indoor heat exchanger 14 is configured of 2 first heat exchangers 14A and 2 second heat exchangers 14B.
The outdoor unit 13 incorporates a blower fan 23. The blower fan 23 ventilates the outdoor heat exchanger 16. The blower fan 23 generates an air flow in accordance with, for example, rotation of the impeller. The air flow passes through the outdoor heat exchanger 16 by the blower fan 23. The outdoor air passes through the outdoor heat exchanger 16 and exchanges heat with the refrigerant. The air flow of the cold air or the warm air after the heat exchange is blown out from the outdoor unit 13. The flow rate of the air flow passing through is adjusted according to the rotation speed of the impeller.
A sirocco fan 24 as an indoor unit fan is incorporated in the indoor unit 12. A sirocco fan 24 ventilates the indoor heat exchanger 14. The sirocco fan 24 generates an air flow in accordance with the rotation of the impeller. Indoor air is drawn into the indoor unit 12 by the sirocco fan 24. The indoor air passes through the indoor heat exchanger 14 and exchanges heat with the refrigerant. The air flow of the cold air or the warm air after the heat exchange is blown out from the indoor unit 12. The flow rate of the air flow passing through is adjusted according to the rotation speed of the impeller.
When the cooling operation is performed in the refrigeration circuit 19, the four-way valve 18 connects the second port 18b and the third port 18c to each other and connects the first port 18a and the fourth port 18d to each other. Therefore, the high-temperature and high-pressure refrigerant is supplied from the discharge pipe 15b of the compressor 15 to the outdoor heat exchanger 16. The refrigerant flows through the outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 in this order. In the outdoor heat exchanger 16, heat is radiated from the refrigerant to the outside air. The refrigerant is decompressed to a low pressure in the expansion valve 17. The refrigerant whose pressure has been reduced absorbs heat from the ambient air in the indoor heat exchanger 14. Cold air is generated. The cool air is blown out into the indoor space by the blower fan 24.
When the refrigeration circuit 19 performs a heating operation, the four-way valve 18 connects the second port 18b and the fourth port 18d to each other and connects the first port 18a and the third port 18c to each other. A high-temperature and high-pressure refrigerant is supplied from the compressor 15 to the indoor heat exchanger 14. The refrigerant flows through the indoor heat exchanger 14, the expansion valve 17, and the outdoor heat exchanger 16 in this order. In the indoor heat exchanger 14, heat is radiated from the refrigerant to the ambient air. Heating is generated. The warm air is blown out into the indoor space by the sirocco fan 24. The refrigerant is decompressed to a low pressure in the expansion valve 17. The refrigerant whose pressure has been reduced absorbs heat from the ambient air in the outdoor heat exchanger 16. After that, the refrigerant returns to the compressor 15. The maximum temperature of the indoor heat exchanger 14 during the heating operation is 53 ℃.
The air conditioner 11 includes a temperature sensor 26a and a humidity sensor 26 b. The temperature sensor 26a is connected to the indoor heat exchanger 14. The temperature sensor 26a measures the temperature of the indoor heat exchanger 14. The temperature sensor 26a outputs a temperature signal containing temperature information of the measured temperature. The humidity sensor 26b is provided in the indoor unit 12. The humidity sensor 26b measures the relative humidity inside the indoor unit 12. The humidity sensor 26b outputs a humidity signal containing humidity information of the measured humidity.
The air conditioner 11 includes a control unit 27. The control unit 27 is formed on, for example, a control panel, not shown, incorporated in the outdoor unit 13. The control unit 27 is electrically connected to the four-way valve 18, the expansion valve 17, and the compressor 15 in the outdoor unit 13 through separate signal lines. Similarly, the control unit 27 is electrically connected to the drive motor of the sirocco fan 24 in the indoor unit 12, the temperature sensor 26a, and the humidity sensor 26b through separate signal lines. The control unit 27 controls the operations of the four-way valve 18, the expansion valve 17, and the compressor 15 in the outdoor unit 13, and the sirocco fan 24 in the indoor unit 12, based on the temperature signal from the temperature sensor 26a and the humidity signal from the humidity sensor 26 b. As a result of such control, the air conditioner 11 performs cooling operation, heating operation, and heating sterilization operation, as will be described later. The control unit 27 can control the operation of the sirocco fan 24 during the cooling operation and the heating operation based on an operation signal input from the remote controller to the indoor unit 12, and can change the flow rate of the cold air or the warm air.
Fig. 3 schematically shows a cross section of the indoor unit 12 according to one embodiment. The indoor unit 12 is an indoor unit of a ceiling-embedded air conditioner, and is installed on the back side of the indoor ceiling 100. The indoor unit 12 is entirely surrounded by a casing 30. The housing 30 is a box-shaped housing having a front panel 31, a back panel 32, a top panel 33, a bottom panel 36 having an air inlet 34 and an air outlet 35, a left side panel, not shown, provided on the depth side of the drawing sheet of fig. 3, and a right side panel, not shown, provided on the front side of the drawing sheet of fig. 3, the air inlet 34 being disposed on the back panel 32 side, and the air outlet 35 being disposed on the front panel 31 side with respect to the air inlet 34. The bottom surface of the bottom panel 36 is exposed to the inside of the room, and therefore, a design, not shown, necessary as a decorative panel is provided on the bottom surface.
A first heat exchanger 14A having a flat plate shape is attached to the lower surface 33a of the top panel 33 on the front panel 11 side in a posture perpendicular to the top panel 33. On the rear plate 32 side of the lower surface 33a of the top plate 33, the second heat exchanger 14B having a flat plate shape is similarly attached in a posture perpendicular to the top plate 33. A sirocco fan 24 is disposed between the first heat exchanger 14A and the second heat exchanger 14B.
The sirocco fan 24 has: a fan motor 41; an impeller 42 fixed to a rotary shaft 41a of the fan motor 41; and a fan housing 43 having a suction port 44 formed in a side surface thereof to communicate with the impeller 42, and a blow-out ventilation passage 45 formed in a lower surface thereof to face an outer peripheral surface of the impeller 42.
A drain pan 40 for collecting the condensed water generated in the first heat exchanger 14A and the second heat exchanger 14B is disposed below the first heat exchanger 14A and the second heat exchanger 14B.
A first space S1 functioning as a ventilation passage is formed between the second heat exchanger 14B and the back plate 32 in the housing 30, and the air intake port 34 is directly opened in the first space S1. Further, a second space S2 functioning as a ventilation passage is also formed between the first heat exchanger 14A and the front panel 31, and a third space S3 functioning as a ventilation passage and connected to the first space S1 and the second space S2 is also formed between the drain pan 40 and the bottom panel 36.
Since the distance of the air flow path from air intake port 34 to air outlet port 35 in which first heat exchanger 14A is arranged is longer than the distance of the air flow path from air intake port 34 to air outlet port 35 in which second heat exchanger 14B is arranged, the air flow resistance of the air flow path in which first heat exchanger 14A is arranged is greater than the air flow resistance of the air flow path in which second heat exchanger 14B is arranged.
The blowout air passage 45 of the above-described sirocco fan 24 is connected to the upper end opening 51 of the blowout guide 50 inserted into the air blowout port 35 of the bottom surface plate 36. The air guide duct S4 between the upper end opening 51 and the lower end opening 52 is formed in a shape curved forward in the downward direction, and the opening surface 52a of the lower end opening 52 is disposed forward of the lower surface of the front panel 11. The outlet guide 50 penetrates the outlet opening 53 of the drain pan 40 and the air outlet 35 of the bottom panel 36, and the lower end opening 52 of the outlet guide 50 serves as a substantial air outlet. The air intake port 34 of the bottom panel 36 is provided between the air outlet opening 35 and the back panel 12.
When the fan motor 41 of the sirocco fan 24 is rotated, the indoor unit 12 sucks air into the second heat exchanger 14B from the air suction port 34 through the first space S1 between the second heat exchanger 14B and the back panel 12, and also sucks air into the first heat exchanger 14A through the third space S3 between the bottom panel 36 and the drain pan 40 and the second space S2 between the front panel 31 and the first heat exchanger 14A. The air that has exchanged heat with the refrigerant in the first heat exchanger 14A and the second heat exchanger 14B and has been drawn into the sirocco fan 24 is blown out from the outlet air duct 45 of the fan case 43 to the front below the front panel 31 via the air guide duct S4 of the outlet guide 50.
The air sucked into the housing 30 from the air inlet 34 by the operation of the sirocco fan 24 flows toward the first heat exchanger 14A and the second heat exchanger 14B separately, but the distance of the ventilation path from the air inlet 34 to the first heat exchanger 14A is longer than the distance of the ventilation path from the air inlet 34 to the second heat exchanger 14B, and therefore the amount of air sucked into the first heat exchanger 14A is smaller than the amount of air sucked into the second heat exchanger 14B due to the influence of the ventilation resistance.
Next, the structure of the indoor heat exchanger 14 of the present embodiment is schematically shown with reference to fig. 2.
In the refrigeration circuit 19, the indoor heat exchanger 14 is connected in parallel between the four-way valve 18 and the expansion valve 17 to the first heat exchanger 14A and the second heat exchanger 14B, is connected to a refrigerant pipe from the expansion valve 17 via the distributor 60, and is connected to a refrigerant pipe from the four-way valve 18 via the header 61. The distributor 60 has a function of branching the refrigerant flowing from the expansion valve 17 to the first heat exchanger 14A and the second heat exchanger 14B, or a function of merging the refrigerant flowing from the first heat exchanger 14A and the second heat exchanger 14B and flowing to the expansion valve 17. The header 61 has a function of merging the refrigerant flowing from the first heat exchanger 14A and the second heat exchanger 14B and flowing to the four-way valve 18, or a function of branching the refrigerant flowing from the four-way valve 18 to the first heat exchanger 14A and the second heat exchanger 14B.
The first heat exchanger 14A and the second heat exchanger 14B each have passages as pipes through which a plurality of refrigerants flow, and in the present embodiment, the first heat exchanger 14A has 3 passages 14A1, and the second heat exchanger 14B has 5 passages 14B 1.
Therefore, the amount of refrigerant flowing in the first heat exchanger 14A and the amount of refrigerant flowing in the second heat exchanger 14B are different, and the amount of refrigerant flowing in the second heat exchanger 14B is larger than the amount of refrigerant flowing in the first heat exchanger 14A.
The number of passages 14A1 of the first heat exchanger 14A and the number of passages 14B1 of the second heat exchanger 14B are determined by the difference between the amount of air drawn into the first heat exchanger 14A by the sirocco fan 24 and the amount of air drawn into the second heat exchanger 14B, and in the present embodiment, the amount of air drawn into the first heat exchanger 14A is smaller than the amount of air drawn into the second heat exchanger 14B, so the number of passages 14A1 of the first heat exchanger 14A is smaller than the number of passages 14B1 of the second heat exchanger 14B.
Therefore, even when the indoor heat exchangers 14 are 2 as in the present embodiment and the amount of air flowing through the first heat exchanger 14A and the amount of air flowing through the second heat exchanger 14B are different from each other in order to increase the heat exchange capacity, the imbalance between the temperature of the refrigerant flowing through the first heat exchanger 14A and the temperature of the refrigerant flowing through the second heat exchanger 14B can be reduced by determining the number of passages 14A1 constituting the first heat exchanger 14A and the number of passages 14B1 constituting the second heat exchanger 14B according to the difference in the amount of air flowing through the indoor heat exchangers 14A.
Thus, when the heat exchangers 14A and 14B are heated and sterilized, the temperatures of the heat exchangers 14A and 14B can be set to predetermined temperatures (for example, 55 ℃).
In the present embodiment, the distance of the ventilation passage from the air inlet 34 to the first heat exchanger 14A is longer than the distance of the ventilation passage from the air inlet 34 to the second heat exchanger 14B, and therefore the ventilation resistance of the ventilation passage from the air inlet 34 to the first heat exchanger 14A is greater than the ventilation resistance of the ventilation passage from the air inlet 34 to the second heat exchanger 14B.
Therefore, for example, even if the distance of the ventilation passage from air inlet 34 to first heat exchanger 14A is the same as the distance of the ventilation passage from air inlet 34 to second heat exchanger 14B, when the cross-sectional area of the ventilation passage from air intake port 34 to first heat exchanger 14A is smaller than the cross-sectional area of the ventilation passage from intake port 34 to second heat exchanger 14B, the ventilation resistance of the ventilation passage from air intake port 34 to first heat exchanger 14A is also greater than the ventilation resistance of the ventilation passage from air intake port 34 to second heat exchanger 14B, therefore, by setting the number of passages 14A1 of the first heat exchanger 14A to be smaller than the number of passages 14B1 of the second heat exchanger 14B, it is possible to achieve imbalance between the temperature of the refrigerant flowing through the first heat exchanger 14A and the temperature of the refrigerant flowing through the second heat exchanger 14B.
That is, the number of passages 14A1 constituting the first heat exchanger 14A and the number of passages 14B1 constituting the second heat exchanger 14B may be determined based on the ventilation resistance of the ventilation path from the air intake port 34 to the first heat exchanger 14A and the ventilation resistance of the ventilation path from the air intake port 34 to the second heat exchanger 14B.
When the number of passages 14A1 that constitute the first heat exchanger 14A and the number of passages 14B1 that constitute the second heat exchanger 14B are determined, the air flow resistance of the air flow path from each of the indoor heat exchangers 14A, 14B to the air outlet port 35 also affects the amount of air sucked into each of the indoor heat exchangers 14A, 14B, and therefore the air flow path from each of the indoor heat exchangers 14A, 14B to the air outlet port 35 needs to be included, and the air flow resistance of the air flow path from the air inlet 34 to the air outlet port 35 needs to be considered.
The indoor heat exchanger 14 is configured by 2 of the first heat exchanger 14A and the second heat exchanger 14B, but the temperature sensor 26a that measures the temperature of the indoor heat exchanger 14 and the humidity sensor 26B that measures the humidity of the indoor heat exchanger 14 need not be attached to each of the first heat exchanger 14A and the second heat exchanger 14B, and may be attached to either the first heat exchanger 14A or the second heat exchanger 14B. This is because, in the present embodiment, although the distance of the air flow path from the air intake port 34 to the first heat exchanger 14A is different from the distance of the air flow path from the air intake port 34 to the second heat exchanger 14B, the number of passages 14A1 constituting the first heat exchanger 14A and the number of passages 14B1 constituting the second heat exchanger 14B are determined in accordance with the distances, and therefore, the temperature of the refrigerant flowing through the first heat exchanger 14A and the temperature of the refrigerant flowing through the second heat exchanger 14B are unlikely to be unbalanced, and it is not necessary to attach the temperature sensor 26a to each of the first heat exchanger 14A and the second heat exchanger 14B.
In the present embodiment, as shown in fig. 3, the temperature sensor 26a and the humidity sensor 26B are disposed on the surface of the second heat exchanger 14B on the first space S1 side and on the lower side. Since the first space S1 is directly open at the air inlet 34, if the temperature sensor 26a is disposed on the surface of the second heat exchanger 14B on the first space S1 side and on the lower side, the temperature sensor 26a and the humidity sensor 26B can be easily inspected from the air inlet 34 during maintenance inspection.
The air conditioner 11 of the present embodiment performs the following heat sterilization operation: by causing the first heat exchanger 14A and the second heat exchanger 14B to function as condensers and controlling the rotation speed of the sirocco fan 24, the condensed water that has caused the first heat exchanger 14A and the second heat exchanger 14B to function as evaporators and has adhered to the first heat exchanger 14A and the second heat exchanger 14B due to the cooling operation is heated at temperatures in a temperature range different from that of the heating operation in the first heat exchanger 14A and the second heat exchanger 14B.
The heat sterilization operation is as follows: the rotation speed of the sirocco fan 24 is driven at a rotation speed lower than that in the case of the heating operation without aiming at the indoor temperature adjustment, and the temperature of the refrigerant flowing through the first heat exchanger 14A and the second heat exchanger 14B is heated in a temperature range different from that in the heating operation, for example, 55 to 59 ℃, so that the condensed water generated on the surfaces of the first heat exchanger 14A and the second heat exchanger 14B is heated without being evaporated, thereby performing moist heat sterilization of bacteria and mold in the condensed water.
In the case of the heating operation, the rotation speed of the sirocco fan 24 is about 500rpm to 1000rpm, but in the case of the heat sterilization operation, the rotation speed of the sirocco fan 24 is, for example, about 200 rpm. By setting the rotation speed of the sirocco fan 24 to be lower than that in the heating operation, the pressure of the high-pressure side refrigerant can be increased, and the temperatures of the first heat exchanger 14A and the second heat exchanger 14B can be maintained at 55 to 59 ℃.
In the air conditioner 11 of the present embodiment, the first heat exchanger 14A and the second heat exchanger 14B function as condensers, and condensed water adhering to the first heat exchanger 14A and the second heat exchanger 14B when the first heat exchanger 14A and the second heat exchanger 14B function as evaporators is heated at 55 to 59 ℃, which is a temperature range different from that of the heating operation, to perform heat sterilization of the first heat exchanger 14A and the second heat exchanger 14B, so that sterilization can be performed at low cost without providing a dedicated device, and sterilization can be performed even in a state where the inside of the indoor unit 12 is highly humid.
Further, even when the distance of the ventilation path from the air intake port 34 to the first heat exchanger 14A is different from the distance of the ventilation path from the air intake port 34 to the second heat exchanger 14B, the number of passages 14A1 constituting the first heat exchanger 14A and the number of passages 14B1 constituting the second heat exchanger 14B are determined in accordance with the above, and therefore, even in the state of the heat sterilization operation, the imbalance between the temperature of the refrigerant flowing through the first heat exchanger 14A and the temperature of the refrigerant flowing through the second heat exchanger 14B can be suppressed, and therefore, the imbalance between the sterilization of the first heat exchanger 14A and the sterilization of the second heat exchanger 14B can be suppressed.
While the foregoing has been described with respect to a limited number of embodiments, the scope of the claims is not limited thereto, and variations of the embodiments will become apparent to those skilled in the art based upon the foregoing disclosure.
Description of the symbols
11 … air conditioner, 13 … outdoor unit, 12 … indoor unit, 14 … indoor heat exchanger, 14a … first heat exchanger, 14B … second heat exchanger, 14a1, 14B1 … passage, 24 … sirocco fan, 26a … temperature sensor, 33 … frame, 34 … air inlet, 35 … air outlet, 40 … drain pan, S1 … first space, S2 … second space, S3 … third space, S4 … air guide passage, 45 … air guide passage.
Claims (5)
1. An air conditioner is characterized in that,
the air conditioner is characterized in that: an outdoor unit having a compressor and a four-way valve; and an indoor unit including a plurality of indoor heat exchangers and an indoor unit fan, and connected to the outdoor unit, wherein the air conditioner controls at least the compressor, the indoor unit fan, and the four-way valve to adjust a temperature of a room in which the indoor unit is installed by causing the plurality of indoor heat exchangers to function as evaporators when cooling and to function as condensers when heating,
the plurality of indoor heat exchangers are caused to function as condensers, and when the plurality of indoor heat exchangers function as evaporators, condensed water adhering to the indoor heat exchangers is heated to a predetermined temperature, thereby performing heat sterilization of the plurality of indoor heat exchangers.
2. The air conditioner according to claim 1,
the indoor unit is provided with:
a frame body having an air suction port and an air blowing port, and having a plurality of ventilation passages in parallel relation to each other between the air suction port and the air blowing port;
at least one indoor heat exchanger disposed in each of the ventilation passages; and
the indoor unit fan is configured to guide air sucked from the air suction port to the air blow-out port via each of the plurality of ventilation paths,
the ventilation resistance of one of the ventilation paths is larger than the ventilation resistances of the other ventilation paths, and the amount of refrigerant flowing through one of the indoor heat exchangers disposed in the one ventilation path is set to be smaller than the amount of refrigerant flowing through the other indoor heat exchangers disposed in the other ventilation paths according to the magnitude of the ventilation resistance.
3. The air conditioner according to claim 2,
each of the plurality of indoor heat exchangers has a plurality of passages through which refrigerant flows, and the number of passages of one heat exchanger is set to be smaller than the number of passages of the other indoor heat exchangers.
4. An air conditioner according to claim 2 or 3,
the frame is a box shape having a front panel, a back panel, a top panel, a bottom panel, a left side panel and a right side panel,
the bottom panel has the air outlet disposed on the front panel side and the air inlet disposed on the rear panel side,
the plurality of indoor heat exchangers includes a first heat exchanger as the one indoor heat exchanger installed near the front panel within the frame and a second heat exchanger as the other indoor heat exchanger installed near the rear panel,
the indoor unit fan has a blowout ventilation passage, the indoor unit fan is disposed at a position between the first heat exchanger and the second heat exchanger,
the air conditioner is provided with:
a drain pan disposed below the first heat exchanger and the second heat exchanger, and collecting the condensed water attached to the first heat exchanger and the second heat exchanger; and
a blowout guide that connects the blowout vent passage with the air outlet to guide the air blown out from the blowout vent passage of the indoor unit fan to the air outlet,
a first space in which the air intake port is opened is formed between the second heat exchanger and the back panel, a second space is formed between the first heat exchanger and the front panel, and a third space is formed between the drain pan and the bottom panel to connect the first space and the second space,
the first heat exchanger and the second heat exchanger are arranged such that the ventilation resistance of a ventilation passage extending from the air intake port to the first heat exchanger via the third space and the second space is greater than the ventilation resistance of a ventilation passage extending from the air intake port to the second heat exchanger via the first space.
5. An air conditioner according to any one of claims 1 to 4,
in the heat sterilization of the plurality of indoor heat exchangers, the rotation speed of the indoor fan is driven to be lower than the lowest rotation speed of the indoor fan in the case of heating.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-231287 | 2019-12-23 | ||
| JP2019231287A JP7031650B2 (en) | 2019-12-23 | 2019-12-23 | Air conditioner |
| PCT/JP2020/048318 WO2021132412A1 (en) | 2019-12-23 | 2020-12-23 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114867969A true CN114867969A (en) | 2022-08-05 |
Family
ID=76541267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080085312.0A Pending CN114867969A (en) | 2019-12-23 | 2020-12-23 | Air conditioner |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4083531A4 (en) |
| JP (1) | JP7031650B2 (en) |
| CN (1) | CN114867969A (en) |
| WO (1) | WO2021132412A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669868A (en) * | 2021-08-30 | 2021-11-19 | 海信（广东）空调有限公司 | Air conditioner and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001174047A (en) * | 1999-12-17 | 2001-06-29 | Matsushita Electric Ind Co Ltd | Indoor unit of air conditioner |
| CN102247707A (en) * | 2011-04-22 | 2011-11-23 | 李耀强 | Embedded dehumidifying and sterilizing device |
| JP2018119718A (en) * | 2017-01-24 | 2018-08-02 | 株式会社富士通ゼネラル | Ceiling-embedded air conditioner |
| WO2018159446A1 (en) * | 2017-02-28 | 2018-09-07 | 株式会社富士通ゼネラル | Air conditioner |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162052A (en) | 2000-11-20 | 2002-06-07 | Daikin Ind Ltd | Air conditioner and indoor heat exchanger |
| JP2016200338A (en) | 2015-04-13 | 2016-12-01 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Air conditioner |
| JP6824779B2 (en) * | 2017-02-28 | 2021-02-03 | 株式会社富士通ゼネラル | Antifungal method of air conditioner and air conditioner using it |
| JP2018189251A (en) | 2017-04-28 | 2018-11-29 | 株式会社富士通ゼネラル | Indoor unit for ceiling embedded type air conditioner |
| JP6737303B2 (en) | 2018-03-30 | 2020-08-05 | 株式会社富士通ゼネラル | Ceiling embedded air conditioner |
| JP2019203629A (en) | 2018-05-22 | 2019-11-28 | 株式会社富士通ゼネラル | Ceiling embedded type air conditioner |
-
2019
- 2019-12-23 JP JP2019231287A patent/JP7031650B2/en active Active
-
2020
- 2020-12-23 CN CN202080085312.0A patent/CN114867969A/en active Pending
- 2020-12-23 WO PCT/JP2020/048318 patent/WO2021132412A1/en unknown
- 2020-12-23 EP EP20906348.6A patent/EP4083531A4/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001174047A (en) * | 1999-12-17 | 2001-06-29 | Matsushita Electric Ind Co Ltd | Indoor unit of air conditioner |
| CN102247707A (en) * | 2011-04-22 | 2011-11-23 | 李耀强 | Embedded dehumidifying and sterilizing device |
| JP2018119718A (en) * | 2017-01-24 | 2018-08-02 | 株式会社富士通ゼネラル | Ceiling-embedded air conditioner |
| WO2018159446A1 (en) * | 2017-02-28 | 2018-09-07 | 株式会社富士通ゼネラル | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7031650B2 (en) | 2022-03-08 |
| EP4083531A4 (en) | 2024-01-17 |
| JP2021099191A (en) | 2021-07-01 |
| EP4083531A1 (en) | 2022-11-02 |
| WO2021132412A1 (en) | 2021-07-01 |
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