JP2007322037A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner where a plurality of indoor units are connected to one outdoor unit in the same room to perform air conditioning, capable of providing a comfortable space by conditioning the air in the whole room by simultaneously operating the indoor units, on the other hand, independently operating the indoor unit in every room in a case when the indoor layout is changed to partition the room, by having a simultaneous operating function and an independent operating function. <P>SOLUTION: A control device having the function for independently operating the indoor units and the function for simultaneously operating the indoor units to one outdoor unit, is disposed, and the functions are selected by a switch of the control device. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner, and is suitable for an air conditioner that connects a plurality of installed indoor units to one outdoor unit.

  As described in JP-A-5-312384, a conventional control system for individual operation functions of an air conditioner is provided with an electromagnetic valve in each indoor unit so that each individual indoor unit can be individually operated, and each is controlled to open and close. Thus, the compressor of the outdoor unit is operated without necessarily operating the indoor unit main unit simultaneously.

JP-A-5-312384

  The prior art described in the above Japanese Patent Application Laid-Open No. 5-312384 has only an individual operation function and cannot switch between simultaneous operation and individual operation with one outdoor unit. For example, when the partition of each indoor space that has been air-conditioned by the individual operation function is eliminated to form one indoor space, air conditioning of the simultaneous operation function is required. In addition, when one indoor space that has been air-conditioned by the simultaneous operation function is partitioned and changed to individual indoor spaces, air conditioning of the individual operation function is required.

  For a single outdoor unit, it must be equipped with a control device that has a function that enables individual operation of each indoor unit and a function that can be operated simultaneously, and can be selected with the selector switch of the control device.

  For one outdoor unit, it has a function that can be operated simultaneously with a function that can individually operate each indoor unit that has flow rate adjusting means for adjusting the amount of refrigerant supplied.

  A control device having a function capable of simultaneously operating each indoor unit having a flow rate adjusting means for adjusting the refrigerant supply amount for one outdoor unit and a function capable of simultaneous operation can be selected by a switch of the control device.

  According to the air conditioner of the present invention, in an air conditioner that performs air conditioning by connecting a plurality of installed indoor units to one outdoor unit in the same room, by having a simultaneous operation function and an individual operation function While the indoor units are operated simultaneously to provide a comfortable space by air-conditioning the entire room, the indoor unit can be individually controlled for each room in a case where the interior layout is changed and partitioned, thereby reducing the comfort space and energy saving. Can be planned.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings of the respective embodiments indicate the same or equivalent.
(First embodiment)
An air conditioner according to a first embodiment of the present invention will be described with reference to FIGS.
First, FIG. 1 shows a refrigeration cycle system. The air conditioner of this embodiment is shown in FIGS. 2 and 3 show a situation where the air conditioner according to the first embodiment of the present invention is installed, and FIG. 3 shows an operation situation of the air conditioner shown in FIG.

  Fig. 1 shows the refrigeration cycle system diagram. This refrigeration cycle consists of a compressor 7, a four-way valve 11, an outdoor unit heat exchanger 8, a blower fan (outdoor) 10, a receiver tank 12, an electronic expansion valve (outdoor) 17, an indoor unit heat exchanger 1a, 1b, It consists of blower fans (indoors) 3a and 3b, electronic expansion valves (indoors) 6a and 6b, etc., which are connected by a gas pipe connection pipe 15, a liquid pipe connection pipe 16, etc. It is configured.

Next, the operation during the refrigeration cycle operation will be described. During the cooling operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 7 passes through the four-way valve 11 and is cooled by the air blown by the blower fan (outdoor) 10 in the outdoor unit heat exchanger 8 to be gas refrigerant. Condensates. After the liquid refrigerant is held in the receiver tank 12, it is depressurized by the electronic expansion valves (indoors) 5a and 5b through the connecting pipe 16 for liquid pipes, and the blower fans (indoors) 3a and 3a in the indoor unit heat exchangers 1a and 1b It becomes a low-temperature and low-pressure gas refrigerant by absorbing heat from the air sent in 3b and evaporating it. The low-temperature and low-pressure gas refrigerant returns to the outdoor unit side again through the gas pipe connection pipe 15, passes through the four-way valve 11, and then returns to the compressor 7 to repeat the same cycle again.
During heating, the high-temperature and high-pressure gas refrigerant discharged from the compressor 7 passes through the four-way valve 10, passes through the gas pipe connection pipe 15, enters the indoor unit side, and is blown by the heat exchanger 1 as a blower fan (indoor ) The gas refrigerant is condensed and liquefied by cooling with the air blown from 3a and 3b. The liquid refrigerant is decompressed by the expansion valves (indoors) 5a and 5b, passes through the liquid pipe connection pipe 16, returns to the outdoor unit side again, and the liquid refrigerant is held in the receiver tank 12, and then the electronic expansion valve (outdoor) 17 In the outdoor unit heat exchanger 8, the pressure is reduced by absorbing heat from the air blown from the blower fan (outdoor) 10 and evaporates to return to the compressor 7 via the four-way valve 11. Repeat the same cycle again.

Next, the flow of the refrigerant by electronic expansion valve control during simultaneous operation during cooling and during individual operation is shown. In the case of simultaneous operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 7 is cooled by the air blown by the blower fan (outdoor) 10 in the outdoor unit heat exchanger 8 via the four-way valve 11. The gas refrigerant is condensed and liquefied. After the liquid refrigerant is held in the receiver tank 12, the indoor unit electronic expansion valves 5a and 5b are decompressed according to the set temperature of the remote controller 6a through the liquid pipe connection pipe 16, and the indoor unit heat exchangers 1a and 1b The heat is absorbed from the air sent by the blower fans (indoors) 3a and 3b and evaporated to become a low-temperature and low-pressure gas refrigerant. The low-temperature and low-pressure gas refrigerant returns to the outdoor unit side again through the gas pipe connection pipe 15, passes through the four-way valve 11, and then returns to the compressor 7. The refrigerant flow is controlled in such a cycle.
In the case of individual operation, the high-temperature and high-pressure gas refrigerant discharged from the compressor 7 is cooled by the air blown by the blower fan (outdoor) 10 in the outdoor unit heat exchanger 8 via the four-way valve 11. The gas refrigerant is condensed and liquefied. After the liquid refrigerant is held in the receiver tank 12, the electronic expansion valves 5a and 5b of the indoor units in each room are depressurized by different depressurization amounts according to the set temperatures of the individual remote controllers 6a and 6b through the liquid pipe connection pipe 16, The indoor unit heat exchangers 1a and 1b absorb the heat from the air sent by the blower fans (indoors) 3a and 3b and evaporate to become a low-temperature and low-pressure gas refrigerant. The low-temperature and low-pressure gas refrigerant returns to the outdoor unit side again through the gas pipe connection pipe 15, passes through the four-way valve 11, and then returns to the compressor 7. The refrigerant flow is controlled in such a cycle.

  FIG. 2 is a construction diagram of an air conditioner that simultaneously operates an air conditioner that performs air conditioning by connecting a plurality of indoor units and one outdoor unit in the same indoor space. A plurality of indoor units 22a and 22b installed in the indoor space 21 are connected to the indoor unit electronic expansion valve 5a and the indoor unit through the gas pipe connection pipe 15 and the liquid pipe connection pipe 16 from the outdoor unit 23 based on the set temperature set in the remote controller 6. The refrigerant is adjusted via 5b and supplied to the plurality of indoor units 22a and 22b to perform air conditioning and provide a comfortable space.

  Fig. 3 shows the air that is air-conditioned by connecting multiple indoor units and one outdoor unit when the indoor space 21 of Fig. 2 is partitioned by changing the layout to create multiple indoor spaces 21a and 21b. The construction drawing of the air conditioner that the harmony machine operates individually is shown. The plurality of indoor units 22a and 22b installed in the plurality of indoor spaces 21a and 21b pass through the indoor unit electronic expansion valves 5a and 5b from the outdoor unit 23 through the gas pipe connection pipe 15 and the liquid pipe connection pipe 16, respectively. The refrigerant supplied to the indoor units 22a.22b is air-conditioned for each of the plurality of indoor spaces 21a, 21b by individually adjusting the amount of refrigerant in the indoor units 22a.22b based on the set temperatures set in the remote controllers 6a, 6b. Provide a comfortable space.

  FIG. 4 is a time chart showing operations of the compressor, the indoor fan, and the electronic expansion valve during simultaneous operation and individual operation. Simultaneous operation is a time chart in which the compressor 7, the No. 1 indoor fan 3a, No. 2 indoor fan 3b, and the electronic expansion valves 5a and 5b all operate simultaneously, and the indoor units 22a and 22b are operating simultaneously. Show. In contrast, in the case of individual operation where the No. 1 indoor unit 22a is in operation and the No. 2 indoor unit 22b is in a stopped state, the indoor fan 3a and the electronic expansion valve 5a are in a state where the compressor 7 is operating. Is operated, the indoor fan 3b and the electronic expansion valve 5b are stopped, the indoor unit 22a is operated, and the indoor unit 22b is stopped, thereby enabling individual operation. As a result, the indoor layout is changed and the indoor space 21 in FIG. 2 is partitioned to create a plurality of indoor spaces 21a and 21b in FIG. 3. Air conditioning can be performed. Thereby, when the indoor space 21b is not used, only the indoor space 21a can be air-conditioned, and energy can be saved by stopping the unused indoor space 21b. When the indoor air conditioning load is different between the indoor space 21a and the indoor space 21b, the set temperature of the remote controllers 6a and 6b can be changed to vary the air conditioning capacity in accordance with the air conditioning load, so that the comfortable space can be preserved.

It is a figure which shows a refrigerating cycle system | strain. FIG. 2 is a diagram showing a state where an air conditioner performing simultaneous operation of the first embodiment of the present invention is installed. FIG. 2 is a diagram showing a state where an air conditioner performing an individual operation according to the first embodiment of the present invention is installed. It is a figure which shows a time chart about operation | movement of the compressor, an indoor fan, and an electronic expansion valve at the time of simultaneous operation and individual operation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Indoor heat exchanger, 2 ... Electric motor for ventilation (indoor), 3 ... Fan for ventilation (indoor), 4 ... Indoor control apparatus, 5 ... Electronic expansion valve (indoor), 6 ... Remote control, 7 ... Compressor, 8 ... outdoor heat exchanger, 9 ... motor for blowing (outdoor), 10 ... fan for blowing (outdoor), 11 ... four-way valve, 12 ... receiver tank, 13 ... outdoor control device, 14 ... changeover switch, 15 ... connection for gas pipe Pipe ... 16 ... Connection pipe for liquid pipe, 17 ... Electronic expansion valve (outdoor), 18 ... Pipe thermistor, 19 ... Pressure sensor, 20 ... Pressure blocking SW, 21 ... Indoor space, 22 ... Indoor unit, 23 ... Outdoor unit, 24 ... Transmission line

Claims (4)

  In an air conditioner that enables connection of multiple indoor units and one outdoor unit, both an individual operation function that can control the start and stop of individual indoor units and a simultaneous operation function that can control the start and stop of individual indoor units at the same time An air conditioner comprising the control device.   In an air conditioner that enables connection of multiple indoor units and one outdoor unit, both an individual operation function that can control the start and stop of individual indoor units and a simultaneous operation function that can control the start and stop of individual indoor units at the same time An air conditioner characterized in that it is possible to select both functions with a selector switch of the control device.   In an air conditioner that enables connection of a plurality of indoor units having a flow rate adjusting means for adjusting a refrigerant supply amount and a single outdoor unit, an individual operation function capable of controlling the start and stop of each indoor unit and each indoor unit An air conditioner comprising a control device for both simultaneous operation functions capable of simultaneously controlling start and stop. In an air conditioner that enables connection of a plurality of indoor units having a flow rate adjusting means for adjusting a refrigerant supply amount and a single outdoor unit, an individual operation function capable of controlling the start and stop of each indoor unit and each indoor unit An air conditioner comprising: a control device for both simultaneous operation functions capable of simultaneously controlling start and stop, and being able to select both functions with a changeover switch of the control device.

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