JP6154331B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner that air-conditions a room.

  A conventional air conditioner includes a GHP (gas heat pump air conditioner) including an outdoor unit configured to include an engine driven compressor using a gas engine as a drive source, and an electric drive compressor using an electric motor as a drive source. And an EHP (electric heat pump air conditioner) having an outdoor unit configured to include

  Since EHP does not include a gas engine, it is not necessary to perform maintenance such as replenishment and replacement of engine oil necessary for GHP, replacement of an oil filter, inspection and replacement of a spark plug, and the cost required for maintenance is not required.

  On the other hand, GHP can heat the air by collecting the exhaust heat of the gas engine in addition to heating by the heat pump (heating the room air), so it can heat the room more efficiently than EHP. It becomes. In addition, since GHP consumes little power, there is an advantage that power consumption can be greatly reduced compared to EHP.

  Thus, GHP and EHP have different advantages. Therefore, in order to take advantage of each advantage, an outdoor unit composed of one housing accommodates an engine driven compressor, an electrically driven compressor, an outdoor heat exchanger, and various sensors. An air conditioner that drives the compressors in parallel is disclosed (for example, Patent Document 1).

JP 2007-10291 A

  In the outdoor unit unit in which the engine-driven compressor and the electric drive compressor described above are integrally formed, the engine-driven compressor and the electric drive compressor share the sensor and the control mechanism. When a common part such as a sensor or a control mechanism fails, the entire outdoor unit becomes unavailable and the air conditioner cannot be operated.

  Furthermore, in the event of a power failure, not only the electric drive compressor cannot be driven, but also the indoor unit cannot be operated, so even if the engine drive compressor can be driven, the air conditioner cannot be operated. End up.

  The present invention has been made in view of such a problem, and an object thereof is to provide an air conditioner that includes both an engine-driven compressor and an electric drive compressor and can be operated even during a power failure. .

In order to solve the above problems, an air conditioner of the present invention is an air conditioner installed in a facility, and is provided with a continuous circulation path through which a refrigerant circulates, a gas engine, and a gas engine provided in the circulation path. Heat exchange between the refrigerant and the outdoor air, a generator that generates electricity using the generator, a battery that stores the electric power generated by the generator, an engine-driven compressor that compresses the refrigerant using the gas engine as a drive source, and the outdoor air a GHP unit having a GHP outdoor heat exchanger for performing, configured independently of the GHP unit, provided in the circulation path, the refrigerant motor driven by a commercial power or we supplied power as a driving source compression An EHP unit having an electrically driven compressor, an EHP outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air, a decompression unit that is provided in the circulation path and depressurizes the refrigerant, One or more indoor unit units having an indoor heat exchanger that exchanges heat with air and an indoor fan that is driven by electric power and sends air to the indoor heat exchanger to promote heat exchange, and the commercial power supply fails. A power failure determination unit that determines whether or not a power source is present, a first input terminal connected to the commercial power supply and the EHP unit via the first power line, and a second input connected to the generator via the second power line A terminal and an output terminal connected to the GHP unit and the indoor unit through a third power line, and when it is determined that the commercial power supply has not failed, the first input terminal and the output terminal When the power source of the power supplied to the GHP unit and the indoor unit is switched to a commercial power source and the commercial power source is determined to be out of power, connect the second input terminal and the output terminal. Te, GHP unit And a power system switching unit that switches a power source of power supplied to the indoor unit to the generator.

  According to the present invention, both an engine-driven compressor and an electric drive compressor are provided, and can be operated even during a power failure.

It is a figure for demonstrating the structure of the air conditioning apparatus concerning embodiment. It is a figure for demonstrating the process of an electric power grid | system switch part. It is a figure for demonstrating the process of an electric power grid | system switch part. It is a figure for demonstrating the structure of the air conditioning apparatus concerning a modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(Air conditioning apparatus 100)
FIG. 1 is a diagram for explaining a configuration of an air-conditioning apparatus 100 according to the present embodiment. The air conditioner 100 is installed in a facility such as a building or a school, and has a GHP unit 110 that functions as an outdoor unit and an EHP unit 150 that functions as an outdoor unit and is separate from the GHP unit 110. A plurality of indoor unit units 200, a GHP unit 110, an EHP unit 150, a refrigerant pipe 230 for circulating a refrigerant in the indoor unit 200, and an operation control unit that controls the GHP unit 110, the EHP unit 150, and the indoor unit 200 250, a power failure determination unit 260, and a power system switching unit 270. In FIG. 1, the flow of electric power is indicated by solid arrows, the signal line is indicated by a two-dot broken line, and the refrigerant flow during cooling is indicated by a one-dot chain line.

  The GHP unit 110 includes a gas engine 112, a generator 114, an inverter 116, a battery 118, an engine-driven compressor 120, a four-way valve 122, and a GHP outdoor heat that exchanges heat with refrigerant and outdoor air. It is configured to include an exchanger 130, a GHP blower 132 that sends air to the GHP outdoor heat exchanger 130 to promote heat exchange, and a GHP controller 140.

  The gas engine 112 is started with electric power supplied from a commercial power source or electric power supplied from a battery 118 described later. The generator 114 generates power using the gas engine 112 as a drive source. The inverter 116 converts the frequency of the electric power generated by the generator 114 to 50 Hz or 60 Hz. The battery 118 stores electric power supplied from a commercial power source or electric power generated by the generator 114. The engine-driven compressor 120 compresses the refrigerant using the gas engine 112 as a drive source.

  The outlet of the engine-driven compressor 120 is connected to the first port of the four-way valve 122 by the refrigerant pipe 230, and the inlet of the engine-driven compressor 120 is connected to the third port of the four-way valve 122 by the refrigerant pipe 230. . One end side of the GHP outdoor heat exchanger 130 is connected to the second port of the four-way valve 122 by the refrigerant pipe 230. The other end side of the GHP outdoor heat exchanger 130 is connected to the decompression unit 210 of the indoor unit 200 described later by the refrigerant pipe 230. The fourth port of the four-way valve 122 is connected to one end side of the indoor heat exchanger 220 of the indoor unit 200 described later by the refrigerant pipe 230. The GHP control unit 140 is configured by a semiconductor integrated circuit including a CPU (central processing unit), and based on a control command from an operation control unit 250 described later (for example, the gas engine 112, the generator 114, Inverter 116, GHP blower 132, various sensors, etc.) are controlled.

  The EHP unit 150 is configured independently of the GHP unit 110, and includes an electric motor 152 driven by electric power supplied from a commercial power source, an electric drive compressor 154 using the electric motor 152 as a drive source, and a four-way valve 160. And an EHP outdoor heat exchanger 170 that exchanges heat between the refrigerant and the outdoor air, an EHP blower 172 that sends air to the EHP outdoor heat exchanger 170 to promote heat exchange, and an EHP control unit 180. Is done. The outlet of the electrically driven compressor 154 is connected to the first port of the four-way valve 160 by the refrigerant pipe 230, and the inlet of the electrically driven compressor 154 is connected to the third port of the four-way valve 160 by the refrigerant pipe 230. . In addition, one end side of the EHP outdoor heat exchanger 170 is connected to the second port of the four-way valve 160 by the refrigerant pipe 230. The other end side of the EHP outdoor heat exchanger 170 is connected to the decompression unit 210 of the indoor unit 200 by a refrigerant pipe 230. The fourth port of the four-way valve 160 is connected to one end side of the indoor heat exchanger 220 of the indoor unit 200 by the refrigerant pipe 230. The EHP control unit 180 is configured by a semiconductor integrated circuit including a CPU (Central Processing Unit), and based on a control command from the operation control unit 250, the entire EHP unit 150 (for example, the electric motor 152, the EHP blower 172, various sensors). Etc.).

  In the present embodiment, the air conditioning apparatus 100 includes two indoor unit units 200 (indicated by 200a and 200b in FIG. 1). The indoor unit 200 includes a decompression unit 210 (expansion valve) that decompresses the refrigerant, an indoor heat exchanger 220 that is connected to the decompression unit 210 by a refrigerant pipe 230 and performs heat exchange between the refrigerant and indoor air, and indoor heat exchange. And an indoor air blowing unit 222 that sends air to the vessel 220 and promotes heat exchange. As described above, one end side of the decompression section 210 is connected to the other end side of the GHP outdoor heat exchanger 130 and the EHP outdoor heat exchanger 170 by the refrigerant pipe 230, and the other end side of the decompression section 210 is connected to the refrigerant pipe 230. The indoor heat exchanger 220 is connected to the other end side, and one end side of the indoor heat exchanger 220 is connected to the fourth ports of the four-way valves 122 and 160 by the refrigerant pipe 230.

  Therefore, when the engine-driven compressor 120 or the electrically driven compressor 154 is driven, the refrigerant circulates through the refrigerant pipe 230, and a series of circulation paths are formed by the refrigerant pipe 230. In the present embodiment, a series of circulation paths through which the refrigerant circulates is a circulation path that passes through the GHP unit 110, the EHP unit 150, and the indoor unit 200a, and a circulation that passes through the GHP unit 110, the EHP unit 150, and the indoor unit 200b. It is branched to the road.

  When functioning the indoor unit 200 as cooling, the first port and the second port of the four-way valve 122 are connected, the fourth port and the third port are connected, and the first port of the four-way valve 160 is connected. By connecting the second port and connecting the fourth port and the third port, the refrigerant is circulated in the direction indicated by the one-dot chain line arrow in FIG. 1, and the compressed refrigerant is transferred to the GHP outdoor heat exchanger 130. , And sent to the EHP outdoor heat exchanger 170. On the other hand, when the indoor unit 200 is caused to function as heating, the first port and the fourth port of the four-way valve 122 are connected, the second port and the third port are connected, and the first port of the four-way valve 160 is connected. By connecting the fourth port and connecting the second port and the third port, the refrigerant is circulated in the direction opposite to the direction indicated by the one-dot chain line in FIG. It is sent to the heat exchanger 220.

  The operation control unit 250 is composed of a semiconductor integrated circuit including a CPU (Central Processing Unit), reads programs and parameters for operating the CPU itself from the ROM, and cooperates with the RAM as a work area and other electronic circuits. Thus, the entire air conditioner 100 is managed and controlled. The operation control unit 250 switches the refrigerant circulation direction in accordance with an operation input by the user to the operation unit (for example, a remote controller), and switches the function of the indoor unit 200 to cooling or heating.

  The power failure determination unit 260 determines whether or not the commercial power source has a power failure. When it is determined that the power failure has occurred, the power failure determination unit 260 generates a power source of power to be supplied to the GHP unit 110 and the indoor unit 200 from the commercial power source. A switching signal for switching to the machine 114 is output to the power system switching unit 270. In the present embodiment, the power failure determination unit 260 measures the voltage value of the commercial power source, and determines that the commercial power source has a power failure when the voltage value becomes less than a predetermined value.

  The power system switching unit 270 switches the power source of power supplied to the GHP unit 110 and the indoor unit 200 to the commercial power source or the generator 114. Note that the power failure determination unit 260 and the power system switching unit 270 may acquire power from a commercial power source or may acquire power from the generator 114. Hereinafter, the processing of the power system switching unit 270 will be described in detail.

  2 and 3 are diagrams for explaining the processing of the power system switching unit 270. FIG. 2 illustrates a normal power system in which the commercial power supply is not interrupted, and FIG. Indicates the power system during a power outage. 2 and 3, connected power lines are indicated by solid arrows, and unconnected power lines are indicated by broken arrows.

  As shown in FIGS. 2 and 3, the commercial power source is connected to the first input terminal 272 a of the EHP unit 150, the power failure determination unit 260, and the power system switching unit 270 via the power line 300. Further, the second input terminal 272 b of the power system switching unit 270 is connected to the inverter 116 of the GHP unit 110 via the power line 310. The output terminal 274 of the power system switching unit 270 is connected to the GHP unit 110, the operation control unit 250, and the indoor unit units 200a and 200b via the power line 320.

  When the switching signal is not input by the power failure determination unit 260, the power system switching unit 270 switches so that the first input terminal 272a and the output terminal 274 are connected as shown in FIG. Note that when the first input terminal 272a and the output terminal 274 are already connected, the power system switching unit 270 does not switch the connection.

  Therefore, during normal times when the commercial power supply is not interrupted, the EHP unit 150 is directly supplied with power from the commercial power supply via the power line 300, and the supplied power drives the motor 152 and the EHP blower 172. Driving, switching of the four-way valve 160, and the like are executed. Further, power is supplied from the commercial power source to the operation control unit 250 through the power line 320, and various control processes are executed. Furthermore, electric power is supplied from the commercial power source to the indoor unit 200 through the power line 320, and the indoor air blowing unit 222 is driven.

  Further, during normal times, the GHP unit 110 is supplied with power from a commercial power source via the power line 320. Then, the gas engine 112 of the GHP unit 110 is started with power supplied from a commercial power source or power stored in the battery 118. Then, the generator 114 is driven by the operation of the gas engine 112. When the generator 114 is driven, charging of the battery 118, driving of the GHP blowing unit 132, switching of the four-way valve 122, and the like are performed by the electric power generated by the generator 114 and frequency-converted by the inverter 116. It becomes. Further, once the generator 114 is driven, the electric power generated by the generator 114 and frequency-converted by the inverter 116 is supplied to the operation control unit 250 and the indoor unit 200 through the power line 320.

  On the other hand, when the switching signal is input by the power failure determination unit 260, the power system switching unit 270 switches so that the second input terminal 272b and the output terminal 274 are connected as shown in FIG. When the second input terminal 272b and the output terminal 274 are already connected, the power system switching unit 270 does not switch the connection.

  Therefore, since electric power is not supplied to the EHP unit 150 at the time of a power failure when the commercial power supply is interrupted, the driving of the electric motor 152, the driving of the EHP blower 172, the switching of the four-way valve 160, etc. are not executed. The operation of 150 cannot be performed. Therefore, the circulation of the refrigerant is not executed in the circulation path passing through the EHP unit 150.

  On the other hand, even in the event of a power failure, in the GHP unit 110, the gas engine 112 is activated with the electric power supplied from the battery 118. Therefore, the generator 114 can generate power when the gas engine 112 is driven. In the GHP unit 110, it is possible to maintain the execution of driving the GHP blower 132, switching the four-way valve 122, and the like with the electric power generated by the generator 114.

  In addition, the electric power generated by the generator 114 is stored in the battery 118, converted in frequency by the inverter 116, and transmitted from the output terminal 274 through the second input terminal 272b.

  Then, since the electric power generated by the generator 114 is supplied to the operation control unit 250 via the power line 310, the second input terminal 272b, the output terminal 274, and the power line 320, the operation control unit 250 executes various control processes. can do. Furthermore, since the electric power generated by the generator 114 is supplied to the indoor unit 200 through the power line 320, it is possible to drive the indoor blower 222 and the like.

  As described above, the air-conditioning apparatus 100 according to the present embodiment includes the battery 118 that stores power for starting the gas engine 112 and the generator 114 that generates power by driving the gas engine 112. With the configuration including the configured GHP unit 110, the GHP unit 110, the indoor unit 200, and the operation control unit 250 can be operated even during a power failure. Thereby, even if it is at the time of a power failure, the situation where the driving | running of air conditioning apparatus 100 itself stops can be avoided, and it becomes possible to suppress the fall of the comfort of indoor environment.

  In addition, the air conditioner 100 according to the present embodiment includes the GHP unit 110 and the EHP unit 150 independently. As a result, even if one of the outdoor unit units of the GHP unit 110 and the EHP unit 150 breaks down during normal operation, the other outdoor unit can be driven to circulate the refrigerant in the indoor heat exchanger 220. It is possible to avoid a situation where the operation of the air conditioner 100 itself stops. Thereby, the fall of the comfort of an indoor environment can be suppressed like a power failure.

(Modification)
FIG. 4 is a diagram for explaining a configuration of an air-conditioning apparatus 400 according to a modification. As shown in FIG. 4, the air conditioner 400 differs from the air conditioner 100 described in the above embodiment only in the position of the power line connected to the EHP unit 150, and the other configurations are substantially the same. More specifically, as shown in FIG. 4, an output terminal 274 is connected to the EHP unit 150 via a power line 320. With this configuration, it is possible to supply a holding current to the EHP unit 150 even during a power failure.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the above-described embodiment, the configuration in which the power generated by the generator 114 is supplied not only to the members configuring the GHP unit 110 but also to the operation control unit 250 and the indoor unit 200 in the normal state has been described. . However, during normal times, the power generated by the generator 114 may be supplied only to the members constituting the GHP unit 110 such as the battery 118 of the GHP unit 110, the GHP blower 132, and the four-way valve 122.

  The present invention can be used for an air conditioner that air-conditions a room.

100, 400 Air conditioning apparatus 110 GHP unit 112 Gas engine 114 Generator 118 Battery 120 Engine-driven compressor 130 GHP outdoor heat exchanger 150 EHP unit 152 Electric motor 154 Electric drive compressor 170 EHP outdoor heat exchanger 200 Indoor unit 210 Decompression unit 222 Indoor fan unit 260 Power failure determination unit 270 Electric power system switching unit

Claims (1)

An air conditioner installed in a facility,
A continuous circulation path through which the refrigerant circulates;
A gas engine, a generator that generates electricity using the gas engine as a drive source, a battery that stores electric power generated by the generator, and the refrigerant that compresses the refrigerant using the gas engine as a drive source. A GHP unit having an engine-driven compressor and a GHP outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air;
Wherein the GHP unit is configured independently provided in the circulation path, and the electrically driven compressor for compressing the refrigerant motor driven by electric power supplied commercial power source or found as a drive source, said refrigerant An EHP unit having an EHP outdoor heat exchanger for exchanging heat with the outdoor air;
A pressure reducing unit that is provided in the circulation path and decompresses the refrigerant, an indoor heat exchanger that exchanges heat between the refrigerant and indoor air, and an electric power driven air to send heat to the indoor heat exchanger One or a plurality of indoor unit units having an indoor air blowing section to be promoted;
A power failure determination unit for determining whether or not the commercial power supply has a power failure;
A first input terminal connected to the commercial power source and the EHP unit via a first power line; a second input terminal connected to the generator via a second power line; and a third power line. and a output terminal connected to the GHP unit and the indoor unit Te, when the commercial power is determined not to power failure, connects the first input terminal and the output terminal the power source of the electric power supplied to the GHP unit and the indoor unit is switched to the commercial power supply, if it is determined that the power source quotient is power failure, the second input terminal and the output terminal connect the power system selector for switching the power source of the electric power supplied to the GHP unit and the indoor machine unit to the generator,
An air conditioner comprising:

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