CN111712674B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- CN111712674B CN111712674B CN201980012954.5A CN201980012954A CN111712674B CN 111712674 B CN111712674 B CN 111712674B CN 201980012954 A CN201980012954 A CN 201980012954A CN 111712674 B CN111712674 B CN 111712674B
- Authority
- CN
- China
- Prior art keywords
- indoor
- capacity
- unit
- low
- indoor unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/48—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring prior to normal operation, e.g. pre-heating or pre-cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
Abstract
The air conditioner has an outdoor unit (10) to which a plurality of indoor units (20A-20C) can be connected. One of the indoor units (20A-20C) connected to the outdoor unit (10) is a low-capacity indoor unit (20C) having a capacity smaller than the other indoor units (20A, 20B). In a low-power indoor unit (20C), when a high-power operation is performed in which the starting capacity is higher than the maximum capacity during normal operation, the compressor (1) of the outdoor unit (10) is started at a higher rotation speed than the maximum rotation speed during start of normal operation.
Description
Technical Field
The present disclosure relates to an air conditioner.
Background
Conventionally, as an air conditioner, when the air conditioning capacity of an outdoor unit is insufficient, capacity control is performed on each indoor unit based on a priority order, and the amount of refrigerant supplied to the indoor unit having a low priority order is limited (see, for example, japanese patent laid-open No. 8-271017 (patent document 1)).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 8-271017
Disclosure of Invention
Problems to be solved by the invention
In addition, in the conventional air conditioner, when there is a strong operation request from an indoor unit, the capacity request of the indoor unit is maximized and the capacity request of another indoor unit having a low priority is reduced, but when the operation is started from a stopped state, it takes time from the room temperature to the target temperature, and the quick cooling performance and the quick heating performance cannot be said to be sufficient.
The present disclosure provides an air conditioner capable of improving a quick cooling performance and/or a quick heating performance.
Means for solving the problems
An air conditioner according to the present disclosure is characterized by comprising an outdoor unit to which a plurality of indoor units can be connected, at least one of the indoor units connected to the outdoor unit being a low-capacity indoor unit having a capacity smaller than that of the other indoor units, and in the low-capacity indoor unit, when a powerful operation having a starting capacity higher than the maximum capacity in a normal operation is started, a compressor of the outdoor unit is started at a rotation speed higher than the maximum rotation speed in the start of the normal operation.
According to the present invention, in the low-capacity indoor unit, the compressor of the outdoor unit is started at the rotation speed higher than the maximum rotation speed at the start of the normal operation, during the powerful operation in which the start-up capacity is higher than the maximum capacity during the normal operation, and therefore, the rapid cooling performance and/or the rapid heating performance can be improved.
In the air conditioner according to one aspect of the present disclosure, the outdoor unit has a warm-up operation function of warming up the compressor during an operation stop.
According to the above embodiment, since the compressor can be warmed up during the operation stop by the warm-up operation function of the outdoor unit, the compressor is not cut off even when the compressor of the outdoor unit is started at a higher rotation speed than the maximum rotation speed at the time of normal start in the powerful operation.
In the air conditioner according to the aspect of the present disclosure, in the power operation, the capacity of the low-capacity indoor unit is prioritized over the capacity of the other indoor units.
According to the present disclosure, when the low-capacity indoor unit and the other indoor units are operated, the capacity of the low-capacity indoor unit is prioritized over the capacity of the other indoor units during the forced operation, and thus, the small space in which the low-capacity indoor unit is installed can be quickly cooled or heated.
In the air conditioner according to one aspect of the present disclosure, the rated cooling capacity of the low-energy indoor unit is less than 2.2 kW.
According to the present disclosure, since the rated cooling capacity is less than 2.2kW, the present invention is suitable for air conditioning in a narrow space such as a toilet or a kitchen.
Drawings
Fig. 1 is a configuration diagram of a multi-type air conditioner including a low-capacity indoor unit according to embodiment 1 of the present disclosure.
Fig. 2 is a block diagram of an outdoor control device of the outdoor unit of the multi-type air conditioner.
Fig. 3 is an external view of the low capacity indoor unit as viewed obliquely from below.
Fig. 4 is a block diagram of an indoor control device of the low-capacity indoor unit.
Fig. 5 is a flowchart for explaining the operation of the multi-type air conditioner.
Fig. 6 is a graph showing a change in indoor temperature and the like during the powerful heating operation of the low-energy indoor unit of the multi-type air conditioner.
Fig. 7 is a configuration diagram of a multiple air conditioner including a low-capacity indoor unit according to embodiment 2 of the present disclosure.
Detailed Description
Hereinafter, embodiments will be described.
[ embodiment 1 ]
Fig. 1 is a configuration diagram of a multi-type air conditioner including a low-capacity indoor unit 20C according to embodiment 1 of the present disclosure.
As shown in fig. 1, the multi-type air conditioner according to embodiment 1 includes: an indoor unit 20A having an indoor heat exchanger 4A and an indoor fan 5A; an indoor unit 20B having an indoor heat exchanger 4B and an indoor fan 5B; a low-capacity indoor unit 20C having an indoor heat exchanger 4C and an indoor fan 5C; and an outdoor unit 10 connected to the indoor units 20A and 20B and the low-capacity indoor unit 20C via refrigerant pipes.
The outdoor unit 10 corresponds to a multi-type air conditioner to which a plurality of indoor units can be connected, and the low-power indoor unit 20C can operate as an indoor unit of the multi-type air conditioner.
In fig. 1, 1 is a compressor, 2 is a four-way switching valve, one end of which is connected to the discharge side of the compressor 1, 3 is an outdoor heat exchanger, one end of which is connected to the other end of the four-way switching valve 2, EVA, EVB, EVC are motor-operated expansion valves, one end of which is connected to the other end of the outdoor heat exchanger 3, 4A, 4B, 4C are indoor heat exchangers, one ends of which are connected to the other ends of the motor-operated expansion valves EVA, EVB, EVC, respectively, and 6 is an accumulator, one end of which is connected to the other ends of the indoor heat exchangers 4A, 4B, 4C via the four-way switching valve 2, and the other end of which is connected to the intake side of the compressor 1. Indoor fans 5A, 5B, and 5C are disposed near the indoor heat exchangers 4A, 4B, and 4C, respectively.
Further, a plurality of refrigerant pipe connection portions 7A, 7B, and 7C are connected to the other ends of the electric expansion valves EVA, EVB, and EVC, and one ends of the indoor heat exchangers 4A, 4B, and 4C are connected to the plurality of refrigerant pipe connection portions 7A, 7B, and 7C, respectively, via communication pipes (refrigerant pipes). Further, a plurality of refrigerant pipe connection portions 8A, 8B, and 8C are connected to the other ends of the indoor heat exchangers 4A, 4B, and 4C via communication pipes (refrigerant pipes).
The compressor 1, the four-way switching valve 2, the outdoor heat exchanger 3, the electric expansion valves EVA, EVB, EVC, the indoor heat exchangers 4A, 4B, 4C, and the accumulator 6 constitute a refrigerant circuit. This refrigerant circuit is filled with a slightly flammable R32 refrigerant.
Further, a discharge pipe temperature sensor 11 is provided on the discharge side of the compressor 1. Further, an outdoor heat exchanger temperature sensor 12 that detects the temperature of the outdoor heat exchanger is provided in the outdoor heat exchanger 3, and an outdoor temperature sensor 13 that detects the outdoor temperature is provided in the vicinity of the outdoor heat exchanger 3.
An indoor heat exchanger temperature sensor 15A for detecting the temperature of the indoor heat exchanger is provided in the indoor heat exchanger 4A, and an indoor temperature sensor 16A for detecting the indoor temperature is provided in the vicinity of the indoor heat exchanger 4A. An indoor heat exchanger temperature sensor 15B for detecting the temperature of the indoor heat exchanger is provided in the indoor heat exchanger 4B, and an indoor temperature sensor 16B for detecting the indoor temperature is provided in the vicinity of the indoor heat exchanger 4B. Further, an indoor heat exchanger temperature sensor 15C for detecting the temperature of the indoor heat exchanger is provided in the indoor heat exchanger 4C, and an indoor temperature sensor 16C for detecting the indoor temperature is provided in the vicinity of the indoor heat exchanger 4C.
The outdoor unit 10 includes an outdoor control device 100 including a microcomputer and an input/output circuit. The outdoor control device 100 includes a communication unit 100b and an operation control unit 100a that controls the compressor 1, the motor-operated expansion valves EVA, EVB, EVC, and the like. Each of the indoor units 20A and 20B includes an indoor control device not shown, and the low-capacity indoor unit 20C includes an indoor control device 200 shown in fig. 2.
The indoor control devices of the indoor units 20A and 20B and the indoor control device 200 of the low-capacity indoor unit 20C communicate with the outdoor control device 100 of the outdoor unit 10 via communication lines (not shown), and thus the outdoor control device 100 operates as a multi-split air conditioner by operating in coordination with the indoor control devices of the indoor units 20A and 20B and the indoor control device 200 of the low-capacity indoor unit 20C.
In the multi-type air conditioner, when the cooling operation is performed in the indoor units 20A and 20B and the low-capacity indoor unit 20C, the four-way switching valve 2 is switched to the position indicated by the broken line, and the operation of the compressor 1 is started. Then, the electric expansion valves EVA, EVB, EVC are opened to predetermined opening degrees, respectively. Then, by operating an outdoor fan (not shown) in the outdoor heat exchanger 3, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 exchanges heat with outdoor air and is condensed to become a liquid refrigerant. Next, the liquid refrigerant from the indoor heat exchangers 4A, 4B, and 4C is decompressed by the electric expansion valves EVA, EVB, and EVC, and then evaporated by heat exchange with the indoor air in the indoor heat exchangers 4A, 4B, and 4C by operating the indoor fans 5A, 5B, and 5C, thereby becoming a gas refrigerant, which is returned to the suction side of the compressor 1.
Here, the rated cooling capacity of the indoor units 20A and 20B is 2.2kW, and the rated cooling capacity of the low-capacity indoor unit 20C is 0.8 kW. That is, the low-capacity indoor unit 20C has lower capacity than the indoor units 20A and 20B, and is used for air conditioning a narrow space such as a toilet or a kitchen.
On the other hand, when the heating operation is performed in the indoor units 20A and 20B and the low-capacity indoor unit 20C, the four-way switching valve 2 is switched to the position indicated by the solid line, and the operation of the compressor 1 is started. Then, the electric expansion valves EVA, EVB, EVC are opened to predetermined opening degrees, respectively. Then, by operating the indoor fans 5A, 5B, and 5C, the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 exchanges heat with indoor air in the indoor heat exchangers 4A, 4B, and 4C, and is condensed to become liquid refrigerant. Next, the liquid refrigerant from the indoor heat exchangers 4A, 4B, and 4C is decompressed by the electric expansion valves EVA, EVB, and EVC, and then evaporated by operating an outdoor fan (not shown) in the outdoor heat exchanger 3 to exchange heat with outdoor air, thereby becoming a gas refrigerant, which is returned to the suction side of the compressor 1.
Fig. 2 is a block diagram of the outdoor control device 100 of the outdoor unit 10 of the multi-type air conditioner.
As shown in fig. 2, the outdoor unit 10 includes an outdoor control device 100 including a microcomputer, an input/output circuit, and the like. The discharge pipe temperature sensor 11, the outdoor heat exchanger temperature sensor 12, the outdoor temperature sensor 13, the compressor 1, the four-way switching valve 2, the fan motor 14, the motor-operated expansion valves EVA, EVB, and EVC are connected to the outdoor control device 100. The outdoor control apparatus 100 includes an operation control unit 100a and a communication unit 100 b.
The operation control unit 100a controls the compressor 1, the motor-operated expansion valves EVA, EVB, EVC, and the like based on detection signals of the discharge pipe temperature sensor 11, the outdoor heat exchanger temperature sensor 12, and the outdoor temperature sensor 13.
The communication unit 100b communicates with the indoor control device 200 (shown in fig. 4) connected to the low-capacity indoor unit 20C of the outdoor unit 10 via the communication unit 200 b.
Fig. 3 is an external view of the low-power indoor unit 20C as viewed obliquely from below. The indoor unit 20C is a ceiling-embedded type indoor unit.
As shown in fig. 3, the low-power indoor unit 20C includes a casing main body 101, a rectangular panel 102 attached to the lower side of the casing main body 101, and a grill 103 detachably attached to the panel 102.
On one side in the longitudinal direction of panel 102, air outlet 110 is provided along the short side of panel 102. Further, a shutter 120 is rotatably attached to the panel 102. Fig. 3 shows a state in which the outlet 110 is closed by the baffle 120.
Further, a drain socket 107 is provided so as to protrude from the side wall of the casing main body 101. A drain hose (not shown) is connected to the drain socket 107 from the outside. The pipe connection portions 105 and 106 are provided so as to protrude from the side walls of the casing main body 101. Refrigerant pipes (not shown) are connected to the pipe connection portions 105 and 106 from the outside.
In fig. 3, reference numeral 108 denotes an electrical component, and 111 to 113 denote suspension fittings provided to protrude laterally from the housing main body 101.
Fig. 4 is a block diagram of the indoor control device 200 of the low-power indoor unit 20C.
As shown in fig. 4, the low-capacity indoor unit 20C includes an indoor control device 200 including a microcomputer and an input/output circuit. The indoor controller 200 is connected to an indoor heat exchanger temperature sensor 15C, an indoor temperature sensor 16C, a fan motor 21, a damper drive unit 22, and a display unit 23. The indoor control device 200 includes an operation control unit 200a and a communication unit 200 b.
The operation control unit 200a controls the fan motor 21, the damper drive unit 22, and the like based on detection signals of the indoor heat exchanger temperature sensor 15C and the indoor temperature sensor 16C.
The communication unit 200b communicates with the outdoor control device 100 (shown in fig. 2) of the outdoor unit 10 connected to the low-capacity indoor unit 20C via the communication unit 100 b.
Fig. 5 is a flowchart for explaining the operation of the multi-type air conditioner.
<1 Chamber operation >
For example, when the low-capacity indoor unit 20C performs a normal heating operation and the indoor units 20A and 20B stop operating, first, an operation command signal from the indoor control device 200 of the low-capacity indoor unit 20C is received in step S1, and it is determined whether or not there is a request for a powerful operation by the outdoor control device 100 of the outdoor unit 10.
When the outdoor control apparatus 100 determines that there is no request for the powerful operation, the routine proceeds to step S2, where the compressor 1 is started at the maximum rotation speed a (for example, 55Hz) at the start of the normal operation.
Next, the process proceeds to step S3, and the outdoor control device 100 and the indoor control device 200 perform normal heating operation control. In the normal heating operation control, the capacity request Δ D of the low-capacity indoor unit 20C is determined based on the target set temperature and the indoor temperature.
On the other hand, when the low-capacity indoor unit 20C performs the powerful heating operation and the indoor units 20A and 20B stop operating, first, a signal from the indoor control device 200 of the low-capacity indoor unit 20C is received in step S1, and when the outdoor control device 100 of the outdoor unit 10 determines that there is a demand for the powerful operation, the routine proceeds to step S4, and the compressor 1 is started at a rotation speed (e.g., 70Hz) higher than the maximum rotation speed a (e.g., 55Hz) at the time of starting the normal operation.
Next, the process proceeds to step S5, and the outdoor control device 100 of the outdoor unit 10 and the indoor control device 200 of the low-capacity indoor unit 20C perform forced operation control by controlling the compressor 1, the motor-operated expansion valves EVA to EVC, and the indoor fan 5C. In the powerful operation control, the capacity request Δ D of the low-capacity indoor unit 20C is maximized and the indoor fan 5C is rotated at a rotation speed higher than the maximum rotation speed of the indoor fan in the normal operation.
< 2 Chamber operation >
For example, when the low-capacity indoor units 20C and 20A perform the normal heating operation and the indoor unit 20B stops operating, first, when the outdoor control device 100 of the indoor unit 20A determines that there is no request for the powerful operation in step S1, the process proceeds to step S2, and the compressor 1 is started at the maximum rotation speed a (for example, 55Hz) at the start of the normal operation.
Next, the process proceeds to step S3, where the outdoor control device 100 of the outdoor unit 10, the indoor control device 200 of the low-capacity indoor unit 20C, and the indoor control device of the indoor unit 20A perform normal heating operation control. In the normal heating operation control, the capacity request Δ D of the low-capacity indoor unit 20C and the indoor unit 20A is determined based on the target set temperature and the indoor temperature.
On the other hand, when the low-energy indoor unit 20C performs the forced heating operation and the indoor unit 20A performs the normal heating operation and the indoor unit 20B stops operating, first, in step S1, signals from the indoor control device 200 of the low-energy indoor unit 20C and the indoor control device of the indoor unit 20A are received, and it is determined whether there is a request for the forced operation by the outdoor control device 100 of the outdoor unit 10.
When the outdoor control apparatus 100 determines that there is a request for the powerful operation, the routine proceeds to step S4, where the compressor 1 is started at a higher rotation speed (e.g., 70Hz) than the maximum rotation speed a (e.g., 55Hz) at the start of the normal operation.
Next, the process proceeds to step S5, and the outdoor control device 100 of the outdoor unit 10 and the indoor control device 200 of the low-capacity indoor unit 20C perform forced operation control by controlling the compressor 1, the motor-operated expansion valves EVA to EVC, and the indoor fan 5C. In the powerful operation control, the capacity request Δ D of the low-capacity indoor unit 20C is maximized, and the indoor fan 5C is rotated at a rotation speed higher than the maximum rotation speed of the indoor fan in the normal operation. At this time, the capacity request Δ D of the indoor unit 20A performing the normal heating operation is determined based on the target set temperature and the indoor temperature.
Here, when the indoor unit 20A is set as the priority room, the indoor control device of the indoor unit 20A also performs the forced operation control.
In this multi-type air conditioner, at the time of installation, one of the plurality of indoor units can be set as a priority room by the setting unit provided in the outdoor unit 10.
< 3 Chamber operation >
When the low-capacity indoor unit 20C performs the intensive heating operation and the indoor units 20A and 20B perform the normal heating operation, the capacity requirement Δ D of the low-capacity indoor unit 20C is maximized and the indoor fan 5C is rotated at a rotation speed higher than the maximum rotation speed of the indoor fan in the normal operation. At this time, the capacity request Δ D of the indoor units 20A and 20B performing the normal heating operation is determined based on the target set temperature and the indoor temperature.
Here, when the indoor unit 20A is set as the priority room, the indoor control device of the indoor unit 20A performs the forced operation control. Alternatively, when the indoor unit 20B is set as the priority room, the indoor control device of the indoor unit 20B performs the forced operation control.
Fig. 6 is a graph showing changes in the indoor temperature and the like during the powerful heating operation of the low-capacity indoor unit 20C. Here, the indoor temperature is an average value of the indoor temperatures at a plurality of measurement points in the space of the room to be measured. In fig. 6, the horizontal axis represents time [ min ], and the vertical axis represents the operating frequency [ Hz ], the indoor temperature [ deg.c ], and the rotational speed of the indoor fan 5C [/10rpm ] of the compressor 1.
As shown in fig. 6, when the low-capacity indoor unit 20℃ starts the powerful heating operation, the capacity requirement Δ D of the low-capacity indoor unit 20℃ is set to the maximum, the rotation speed of the indoor fan 5C is set to 1670rpm, and when the compressor 1 is started at 70Hz, the outside air temperature is 2 ℃, and the indoor temperature reaches 20 ℃ from 10 ℃ within 10 minutes.
According to the multi-type air conditioner configured as described above, in the low-capacity indoor unit 20C, the compressor 1 of the outdoor unit 10 is started at a higher rotation speed than the maximum rotation speed at the start of the normal operation during the powerful operation in which the starting capacity is higher than the maximum capacity during the normal operation, and therefore the quick cooling performance and/or the quick heating performance can be improved.
In addition, when the low-energy indoor unit 20C and the other indoor units 20A and 20B perform the cooling operation or the heating operation, the low-energy indoor unit 20C can quickly perform cooling or heating in the small space in which the low-energy indoor unit 20C is installed by giving priority to the capacity of the low-energy indoor unit 20C over the other indoor units 20A and 20B during the powerful operation.
The operation that prioritizes the capacity of the low-capacity indoor unit 20C is an operation in which the capacity is concentrated on the low-capacity indoor unit 20C by setting the heat stop determination temperature at which the other indoor units 20A and 20B reach the set temperature to be higher in the cooling operation than in the normal operation and lower in the heating operation than in the normal operation.
The low-capacity indoor unit 20C has a rated cooling capacity of 0.8kW, and is therefore suitable for air conditioning in a narrow space such as a toilet or a kitchen.
In the multi-type air conditioner according to embodiment 1, the forced operation control during the heating operation is described, but the same forced operation control may be performed during the cooling operation.
[ 2 nd embodiment ]
Fig. 7 is a configuration diagram of a multi-type air conditioner including a low-capacity indoor unit 20C according to embodiment 2 of the present disclosure. The multiple air conditioner of embodiment 2 has the same configuration as that of embodiment 1 except that it has a preheating function of preheating the compressor 1 of the outdoor unit 10.
The preheating function is a function of preheating the compressor 1 by a preheating section 1a (a coil of the motor) provided in the compressor 1. The motor drive signal from the outdoor control device 100 is phase-lost, so that the coil itself generates heat without rotating the motor. The warm-up operation function of the outdoor unit 10 is, for example, to warm up the compressor 1 when the outside air temperature is equal to or lower than a predetermined temperature.
According to the multi-type air conditioner having the above configuration, since the compressor 1 can be warmed up during the operation stop by the warm-up operation function of the outdoor unit 10, even if the compressor 1 of the outdoor unit 10 is started at a rotation speed higher than the maximum rotation speed at the time of normal start during the powerful operation, the lubricating oil in the compressor 1 can be warmed up in advance to improve the lubricating performance, and the compressor 1 is not cut off.
In addition, in embodiment 2 described above, the preheating section 1a that preheats the compressor 1 is used as the coil of the motor in the compressor 1, but a heater or the like provided in the compressor 1 may be used as the preheating section.
In the above-described embodiment 1 and embodiment 2, the multi-type air conditioner having the low-power indoor unit 20C and the other indoor units 20A and 20B has been described, but the present invention may be applied to a multi-type air conditioner having a plurality of low-power indoor units, or a multi-type air conditioner having one or three or more other indoor units.
Although specific embodiments of the present disclosure have been described, the present disclosure is not limited to the above-described embodiment 1 and embodiment 2, and may be implemented with various modifications within the scope of the present disclosure. For example, an embodiment obtained by appropriately combining the contents described in embodiment 1 and embodiment 2 may be used as an embodiment of the present disclosure.
Description of the reference symbols
1: a compressor; 1 a: a preheating section; 2: a four-way switching valve; 3: an outdoor heat exchanger; 4A, 4B, 4C: an indoor heat exchanger; 5A, 5B, 5C: an indoor fan; 6: an accumulator; 7A, 7B, 7C: a refrigerant pipe connection section; 8A, 8B, 8C: a refrigerant pipe connection section; 10: an outdoor unit; 11: a discharge pipe temperature sensor; 12: an outdoor heat exchanger temperature sensor; 13: an outdoor temperature sensor; 15A, 15B, 15C: an indoor heat exchanger temperature sensor; 16A, 16B, 16C: an indoor temperature sensor; 20A, 20B: an indoor unit; 20C: a low-capacity indoor unit; 100: an outdoor control device; 100 a: an operation control unit; 100 b: a communication unit; 200: an indoor control device; 200 a: an operation control unit; 200 b: a communication unit; EVA, EVB, EVC: an electric expansion valve.
Claims (4)
1. An air conditioner is characterized in that,
the air conditioner comprises an outdoor unit (10) to which a plurality of indoor units (20A-20C) can be connected,
at least one of the indoor units (20A-20C) connected to the outdoor unit (10) is a low-capacity indoor unit (20C) having a capacity smaller than the other indoor units (20A, 20B),
the low-capacity indoor unit (20C) is configured to perform, during operation, either normal operation in which a capacity request (Δ D) for the low-capacity indoor unit (20C) is determined on the basis of a target set temperature and an indoor temperature, or forced operation in which the low-capacity indoor unit (20C) has a capacity higher than the maximum capacity in the normal operation,
the outdoor unit (10) starts a compressor (1) of the outdoor unit (10) at a maximum rotation speed at the start of the normal operation when it is determined that the request for the forced operation is not present on the basis of an operation command signal from the low-capacity indoor unit (20C),
when it is determined that the request for forced operation is present based on an operation command signal from the low-capacity indoor unit (20C), the outdoor unit (10) starts a compressor (1) of the outdoor unit (10) at a rotation speed higher than the maximum rotation speed at the start of the normal operation.
2. The air conditioner according to claim 1,
the outdoor unit (10) has a warm-up operation function for warming up the compressor (1) during an operation stop.
3. An air conditioner according to claim 1 or 2,
in the power operation, the capacity of the low-capacity indoor unit (20C) is prioritized over the capacities of the other indoor units (20A, 20B).
4. An air conditioner according to claim 1 or 2,
the rated refrigerating capacity of the low-capacity indoor unit (20C) is less than 2.2 kW.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-031167 | 2018-02-23 | ||
| JP2018031167A JP6624219B2 (en) | 2018-02-23 | 2018-02-23 | Air conditioner |
| PCT/JP2019/000444 WO2019163317A1 (en) | 2018-02-23 | 2019-01-10 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111712674A CN111712674A (en) | 2020-09-25 |
| CN111712674B true CN111712674B (en) | 2022-08-30 |
Family
ID=67687651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980012954.5A Active CN111712674B (en) | 2018-02-23 | 2019-01-10 | Air conditioner |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3742064B1 (en) |
| JP (1) | JP6624219B2 (en) |
| CN (1) | CN111712674B (en) |
| ES (1) | ES2911499T3 (en) |
| WO (1) | WO2019163317A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719412B (en) * | 2022-03-17 | 2023-08-22 | 浙江中广电器集团股份有限公司 | Control method for improving heating comfort of multi-connected machine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3101526B2 (en) | 1995-03-31 | 2000-10-23 | 三洋電機株式会社 | Control method of distributed arrangement type air conditioner |
| JP3275669B2 (en) * | 1995-11-28 | 2002-04-15 | 松下電器産業株式会社 | Multi-room air conditioning system |
| JP3799940B2 (en) * | 2000-03-07 | 2006-07-19 | ダイキン工業株式会社 | Air conditioner and control method thereof |
| JP4899549B2 (en) * | 2005-10-31 | 2012-03-21 | ダイキン工業株式会社 | Compressor operating method of refrigeration apparatus and refrigeration apparatus |
| US20120271460A1 (en) * | 2011-04-22 | 2012-10-25 | Rognli Roger W | Universal demand-response remote control for ductless split system |
| CN103890502B (en) * | 2011-10-24 | 2017-03-01 | 三菱电机株式会社 | Heat pump, control device, method for regulating temperature and program |
| JP6116087B2 (en) * | 2012-08-31 | 2017-04-19 | 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 and control method of air conditioner |
| JP6279310B2 (en) * | 2013-12-20 | 2018-02-14 | 三菱重工サーマルシステムズ株式会社 | Control device for air conditioner and control method for air conditioner |
| KR102295969B1 (en) * | 2015-03-24 | 2021-08-30 | 엘지전자 주식회사 | Air-conditioner and method for thereof |
-
2018
- 2018-02-23 JP JP2018031167A patent/JP6624219B2/en active Active
-
2019
- 2019-01-10 ES ES19757445T patent/ES2911499T3/en active Active
- 2019-01-10 CN CN201980012954.5A patent/CN111712674B/en active Active
- 2019-01-10 WO PCT/JP2019/000444 patent/WO2019163317A1/en unknown
- 2019-01-10 EP EP19757445.2A patent/EP3742064B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3742064B1 (en) | 2022-03-16 |
| EP3742064A4 (en) | 2021-03-17 |
| JP6624219B2 (en) | 2019-12-25 |
| JP2019143949A (en) | 2019-08-29 |
| CN111712674A (en) | 2020-09-25 |
| WO2019163317A1 (en) | 2019-08-29 |
| ES2911499T3 (en) | 2022-05-19 |
| EP3742064A1 (en) | 2020-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5858062B2 (en) | Air conditioning system | |
| WO2019163346A1 (en) | Air conditioner | |
| US20150276255A1 (en) | Air conditioning apparatus | |
| US10401060B2 (en) | Conditioner determining a closed condition of an expansion valve | |
| JP2006145204A (en) | Air conditioner | |
| WO2018179137A1 (en) | Air conditioning device | |
| JP3816782B2 (en) | Air conditioner | |
| JP6653588B2 (en) | Air conditioners and air conditioners | |
| CN111712674B (en) | Air conditioner | |
| JP2014126287A (en) | Air conditioning system | |
| WO2017119138A1 (en) | Air-conditioning device | |
| JPH03241260A (en) | Multi-room air-conditioner | |
| KR101152936B1 (en) | A multi air conditioner system and a pipe connection searching method of the multi air conditioner system | |
| JP4105413B2 (en) | Multi-type air conditioner | |
| JP2002147819A (en) | Refrigeration unit | |
| JP6853205B2 (en) | Low capacity indoor unit | |
| KR100667097B1 (en) | Operation method for multi type air conditioner | |
| CN113834248A (en) | Air conditioner | |
| JP2002048382A (en) | Air conditioner | |
| JP2019215134A (en) | Composite heat source heat pump device | |
| CN112041619B (en) | Air conditioning system | |
| JPH10332186A (en) | Air conditioner | |
| JP3443159B2 (en) | Air conditioner | |
| KR100707350B1 (en) | A air conditioner and control method thereof | |
| JPH0355729B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |