JP2005037020A - Heat accumulation type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat accumulation type air conditioner capable of enhancing the cleaning performance and cleaning pipes in a short time. <P>SOLUTION: In the heat accumulation type air conditioner comprises an outdoor unit, a heat accumulation unit and an indoor unit which are pipe-connected to each other. The heat accumulation type air conditioner has a first control valve 61 provided inside the heat accumulation unit between a heat accumulation expansion device 8 and an indoor expansion device 11, a second control valve 62 provided inside the heat accumulation unit between a first heat accumulation control valve 51 and an indoor heat exchanger 12, a first cleaning device connection port 71 provided inside the heat accumulation unit in the middle of the pipe between the first control valve 51 and the indoor expansion device 11, and a second cleaning device connection port 72 provided inside the heat accumulation unit in the middle of the pipe between a second control valve 52 and the indoor heat exchanger 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat storage type air conditioner.
[0002]
[Prior art]
Conventionally, CFC chlorofluorocarbons and HCFC hydrochlorofluorocarbons have been used as air conditioner refrigerants. When these refrigerants are released into the atmosphere, chlorine atoms contained in these refrigerants cause the ozone layer. There is a risk of destruction, and CFC is completely abolished, and HCFC is also abolished. Instead of these refrigerants, HFC hydrofluorocarbons not containing chlorine atoms are beginning to be used.
[0003]
However, the refrigerating machine oil used in the air conditioner using the HCFC refrigerant has very little compatibility with the HFC refrigerant. In addition, when an air conditioner that uses a CFC refrigerant or an HCFC refrigerant is changed to an air conditioner that uses an HFC refrigerant, it is preferable to use an existing pipe. It is necessary to perform cleaning to remove the. When cleaning the piping, connect the outdoor unit, the heat storage unit, and the indoor unit sequentially with the piping, and drive the outdoor unit compressor to connect the outdoor unit and the heat storage unit. It is known to clean the inside of piping to be performed, and is described in, for example, Japanese Patent Application Laid-Open No. 2003-90652.
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-90652
[Problems to be solved by the invention]
In the above-described conventional technology, the pressure loss due to the valve body inside the heat storage unit causes a decrease in the cleaning performance due to a decrease in the flow rate of the cleaning fluid, and it takes time to clean the piping from the heat storage unit to the indoor unit, and the refrigeration oil adheres. It will increase. In addition, since a plurality of pipes are arranged in parallel in the heat storage heat exchanger, the flow rate of the cleaning refrigerant is decreased, and oil dissolved in the refrigerant by the pipe cleaning is easily accumulated in the heat storage heat exchanger.
[0005]
The present invention provides a regenerative air conditioner that solves the above-mentioned problems of the prior art, improves the cleaning performance, and can perform pipe cleaning in a short time.
[0006]
[Means for Solving the Problems]
The present invention includes a compressor, an outdoor unit having an outdoor heat exchanger, a heat storage heat exchanger, a heat storage medium, a heat storage expansion device, a heat storage unit in which a first heat storage on-off valve is sequentially connected by piping, an indoor heat exchanger, In a heat storage air conditioner piped to an indoor unit having an indoor expansion device, a first on-off valve provided between the heat storage expansion device and the indoor expansion device and provided inside the heat storage unit; Between the first heat storage on-off valve and the indoor heat exchanger, in the middle of piping between the second on-off valve provided inside the heat storage unit, the first on-off valve and the indoor expansion device, A first cleaning device connection port provided in the heat storage unit, and a second cleaning device connection port provided in the heat storage unit that is in the middle of piping between the second on-off valve and the indoor heat exchanger. It is provided.
[0007]
In the above, when the cleaning device is operated by connecting the discharge side connection port of the cleaning device to the first cleaning device connection port and the suction side connection port of the cleaning device to the second cleaning device connection port. It is desirable to open the indoor expansion device.
[0008]
Further, in the above, the apparatus includes a plurality of the indoor units, the discharge side connection port of the cleaning device is connected to the first cleaning device connection port, and the suction side connection port of the cleaning device is connected to the second cleaning device connection port. When operating the cleaning device, it is preferable that some of the plurality of indoor expansion devices are opened and the other indoor expansion devices are closed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 shows an embodiment, in which an outdoor unit includes a compressor 1, a four-way valve 2, a heat exchanger 3, and an outdoor expansion device 4 sequentially connected by piping, and a heat storage unit includes a first heat storage on-off valve 51 and a second heat storage. On-off valve 52, third heat storage on-off valve 53, first on-off valve 61, second on-off valve 62, first cleaning device connection port 71, second cleaning device connection port 72, heat storage expansion device 8, heat storage medium 9, heat storage heat The indoor unit includes an indoor expansion device 11 and an indoor heat exchanger 12 that are sequentially connected by piping.
[0010]
The second heat storage on / off valve 52 is arranged in the middle of the piping connecting the outdoor expansion device 4 and the indoor expansion device 11, and the first on-off valve 61 is in the middle of the piping connecting the second heat storage on / off valve 52 and the indoor expansion device 11. Be placed. The second on-off valve 62 is disposed in the middle of the connection pipe between the four-way valve 2 and the indoor heat exchanger 12. A branch portion, a heat storage expansion device 8, a heat storage heat exchanger 10, a third heat storage on-off valve 53, a four-way valve 2, and a first on-off valve in the middle of a connection pipe between the second heat storage on-off valve 52 and the first on-off valve 61 The branch portion in the middle of the connection pipe to 62 is sequentially connected by the pipe.
A branch part in the middle of the pipe connecting the heat storage heat exchanger 10 and the third heat storage on / off valve 53 and a branch part in the middle of the pipe connecting the outdoor expansion device 4 and the second heat storage on / off valve 52 are the first heat storage on / off. The valve 51 is connected.
A cycle piping cleaning device is connected to the heat storage unit to remove oil in the cycle piping. The first cleaning device connection port 71 for connection is provided in the middle of the piping between the first on-off valve 61 and the indoor expansion device 11. Furthermore, the 2nd washing | cleaning apparatus connection port 72 is provided in the middle of piping of the 2nd on-off valve 62 and the indoor heat exchanger 12. FIG.
[0011]
FIG. 2 shows the wiring of the transmission line between the cleaning device, the outdoor unit, the heat storage unit, and the indoor unit. The transmission line connects the cleaning device control device, the outdoor unit control device, the heat storage unit control device, and the indoor unit control device in order. Yes.
FIG. 3 shows a cleaning device. The cleaning device is provided with a refrigerant circulation device that circulates a refrigerant and an oil recovery container that recovers oil in the cycle piping, and is provided with a cleaning device suction side connection port and a cleaning device discharge side connection port. It has been.
[0012]
The cleaning method will be described below with reference to the drawings.
The pipe connecting the indoor unit and the heat storage unit is a pipe used for a CFC refrigerant or HCFC refrigerant, and refrigeration oil is attached to the inner surface. Further, the pipe connecting the outdoor unit and the heat storage unit is a new pipe.
[0013]
The discharge side connection port of the cleaning device is connected to the first cleaning device connection port 71, the suction side connection port is connected to the second cleaning device connection port 72, and the first on-off valve 61 and the second on-off valve 62 are opened. The operation of opening the first on-off valve 61 and the second on-off valve 62 is performed manually or by a command from the cleaning device.
[0014]
When the operation of the cleaning device is started, control information of the indoor expansion device 11 is sent from the control device of the cleaning device via a transmission line, the indoor expansion device 11 is opened, the refrigerant circulation device of the cleaning device is driven, and the cleaning refrigerant is used. A certain CFC-based or HCHC-based refrigerant flows through the pipe between the heat storage unit and the indoor unit, and the refrigerant dissolves the refrigeration oil adhering to the inner surface of the pipe. Oil is collected in the collection container. When the control device of the cleaning device determines that the cleaning is completed, control information for the indoor expansion device 11 is sent via a transmission line, and the indoor expansion device 11 is closed.
[0015]
As shown in FIG. 4, when a plurality of indoor units are connected, the indoor expansion device 11 is opened only for the indoor unit a, and the indoor expansion devices 11 of the indoor units b and c are closed. To do. This command is sent from the control device of the cleaning device via a transmission line when the cleaning device operation is started, and the refrigerant circulation device of the cleaning device is driven to start the cleaning operation.
When the piping between the indoor unit a and the heat storage unit is completely cleaned, the indoor expansion device 11 is opened only in the indoor unit b to start the piping cleaning between the indoor unit b and the heat storage unit, and the indoor units a and c The expansion device 11 is also closed. As described above, when the cleaning operation in which a plurality of indoor units are connected is performed, the operation is performed such that only one indoor expansion device of the indoor unit is opened and the indoor expansion devices of the other indoor units are closed.
[0016]
As described above, by performing the cleaning operation in the pipe connecting the heat storage unit and the indoor unit, it is possible to prevent the cleaning fluid from being deteriorated due to the decrease in the flow rate of the cleaning fluid due to the pressure loss due to the valve body inside the heat storage unit. .
[0017]
【The invention's effect】
According to the present invention, it is possible to improve the cleaning performance and perform pipe cleaning in a short time.
[Brief description of the drawings]
FIG. 1 is a block diagram of an air conditioner showing an embodiment according to the present invention.
FIG. 2 is a block diagram showing the connection of transmission lines that connect the control device for the air conditioner and the cleaning device according to one embodiment.
FIG. 3 is a block diagram showing a cleaning device according to one embodiment.
FIG. 4 is a block diagram showing an air conditioner according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Four-way valve, 3 ... Outdoor heat exchanger, 4 ... Outdoor expansion apparatus, 51 ... 1st heat storage on-off valve, 52 ... 2nd heat storage on-off valve, 53 ... 3rd heat storage on-off valve, 61 ... 1st DESCRIPTION OF SYMBOLS 1 ... On-off valve, 62 ... 2nd on-off valve, 71 ... 1st washing | cleaning apparatus connection port, 72 ... 2nd washing | cleaning apparatus connection port, 8 ... Thermal storage expansion apparatus, 9 ... Thermal storage medium, 10 ... Thermal storage heat exchanger, 11 ... Indoor Expansion device, 12 ... indoor heat exchanger.

Claims (3)

An outdoor unit having a compressor, an outdoor heat exchanger, a heat storage heat exchanger, a heat storage medium, a heat storage expansion device, a heat storage unit in which a first heat storage on / off valve is sequentially connected by piping, an indoor heat exchanger, and an indoor expansion device In the regenerative air conditioner in which the indoor unit has a pipe connection,
A first on-off valve provided between the heat storage expansion device and the indoor expansion device and provided inside the heat storage unit;
A second on-off valve provided between the first heat storage on-off valve and the indoor heat exchanger, and provided inside the heat storage unit;
In the middle of piping between the first on-off valve and the indoor expansion device, a first cleaning device connection port provided in the heat storage unit,
In the middle of piping between the second on-off valve and the indoor heat exchanger, a second cleaning device connection port provided in the heat storage unit,
A regenerative air conditioner characterized by comprising 2. The apparatus according to claim 1, wherein the discharge side connection port of the cleaning device is connected to the first cleaning device connection port, the suction side connection port of the cleaning device is connected to the second cleaning device connection port, and the cleaning device is operated. A regenerative air conditioner is characterized in that when the indoor expansion device is opened. 2. The apparatus according to claim 1, comprising a plurality of the indoor units, wherein a discharge-side connection port of the cleaning device is connected to the first cleaning device connection port, and a suction-side connection port of the cleaning device is connected to the second cleaning device connection port. When connecting and operating the said washing | cleaning apparatus, some said indoor expansion apparatuses are opened among these units | sets, and the said other indoor expansion apparatus is closed, The thermal storage air conditioner characterized by the above-mentioned.

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