JPH0743041A - Power supply device for engine driven type heat pump device - Google Patents

Abstract

PURPOSE:To enable an engine driving to be carried but without increasing a capacity of a commercial power supply by a method wherein an AC of the commercial power supply is changed into a DC and charged in a battery cell, when a voltage of the commercial power supply is more than a predetermined voltage, the commercial power supply is connected to an engine driving type heat pump device and in turn when the voltage is less than the predetermined value, a battery cell is connected. CONSTITUTION:An electrical charging means 103 in a power supply device 101 for an engine driving type heat pump device changes an AC of a commercial power supply 100 into a DC and charges in a battery cell 102. A DC/AC converting means 105 changes a DC of the battery cell 102 into an AC. In turn, the power supply device 101 detects a voltage of the commercial power supply 100 through a voltage sensing means 104. In the case that a voltage in the commercial power supply 100 is more than a predetermined value, the commercial power supply 100 is connected to an engine driving type heat pump device 1 through a changing-over means 106 and when the value is less than a predetermined value, the battery cell 102 is connected to the heat pump device 1. With such an arrangement as above, it is possible to prevent the engine driving type heat pump device from being rapidly stopped due to a voltage drop or a power failure and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for an engine driven heat pump device which is interposed between a commercial power supply and an engine driven heat pump device.

[0002]

2. Description of the Related Art An engine-driven heat pump device drives a compressor by an engine and circulates a refrigerant in a refrigerant circuit to cool and heat the compressor. In this engine-driven heat pump device, a commercial power source is a power source for starting and controlling the engine-driven heat pump device.

[0003]

As described above, since the engine-driven heat pump device is operated by the engine and the engine is started by the starter motor, a large amount of electric power is required when the engine is started as compared with the normal operation. Becomes

For this reason, when the power capacity of the commercial power source is set to a value suitable for normal operation, the voltage drops when the engine is started. Therefore, it is necessary to use a commercial power source having a large capacity, and the electricity charge increases accordingly.

Further, since the commercial power source serves as a power source for controlling the engine-driven heat pump device, the voltage drops more and more if it is operated until it stops due to, for example, a voltage drop or a power failure.
If stopped suddenly, preset data, operation data, etc. stored in the remote controller, main body controller, etc. are lost.

Further, when the engine-driven heat pump device suddenly stops, if the internal pressure of the refrigerant or the like remains in the refrigerant circuit or the like, a load is constantly applied to the piping and pressure vessel forming the circuit, such as an accumulator. However, it may cause deterioration of durability.

The present invention has been made in view of such circumstances, and it is possible to drive the engine without increasing the capacity of the commercial power source, and the internal pressure of the refrigerant or the like remains in the refrigerant circuit or the like. An object of the present invention is to provide a power supply device for an engine-driven heat pump device that prevents the engine-driven heat pump device from stopping.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is an engine drive for cooling and heating by circulating a refrigerant in a refrigerant circuit by a commercial power source and a compressor driven by an engine. In an engine-driven heat pump device power supply device interposed between a commercial heat pump device, a storage battery, charging means for converting alternating current of the commercial power supply into direct current to charge the storage battery, and voltage of the commercial power supply. Is greater than or equal to a predetermined value, the commercial power source is connected to the engine-driven heat pump device, and the storage battery is connected to the engine-driven heat pump device when the predetermined value or less.

According to a second aspect of the present invention, there is provided a power supply device for an engine-driven heat pump device, wherein voltage comparison means for comparing the voltage of the commercial power supply and the output voltage of the storage battery with a reference voltage, and the voltage of the commercial power supply are predetermined. It is characterized by comprising power supply monitoring means for outputting an operation stop signal of the engine-driven heat pump device when the output voltage of the storage battery becomes a predetermined value or less at the following times.

[0010]

According to the invention as set forth in claim 1, the voltage of the commercial power source is equal to or higher than a predetermined value during normal operation of the engine-driven heat pump device. At this time, the commercial power source is connected to the engine-driven heat pump device and the commercial power source is Supplied.

On the other hand, when the engine of the engine-driven heat pump device is started, the voltage of the commercial power source drops below a predetermined level. At this time, the storage battery is connected to the engine-driven heat pump device and the storage battery is used as the drive power source.

According to the second aspect of the invention, when the output voltage of the storage battery falls below a predetermined level when the commercial power source is below a predetermined level, an operation stop signal of the engine-driven heat pump device is output, for example, a voltage drop or a power failure. It is possible to prevent the engine driven heat pump device from suddenly stopping due to, for example, so that the internal pressure of the refrigerant or the like does not remain in the refrigerant circuit or the like.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A power supply unit for an engine driven heat pump device according to the present invention will be described in detail below with reference to the drawings.

First, FIG. 1 is a schematic configuration diagram of the engine-driven heat pump device during a cooling operation, and FIG. 2 is a schematic configuration diagram of the engine-driven heat pump device during a heating operation.

In the figure, reference numeral 1 is an engine-driven heat pump device, and this engine-driven heat pump device 1 is composed of an outdoor unit 2 and an indoor unit 3. The outdoor unit 2 of the engine-driven heat pump device 1 includes a compressor 4 and a water-cooled engine 5 that drives the compressor 4. The compressor 4 compresses and circulates a refrigerant such as CFC. It has a circuit 6 and a hot water circuit 7 for circulating the cooling water of the engine 5.

A mixer 8 is connected to the engine 5, and the gas solenoid valves 9 and 10 and the zero governor 1 are connected to the mixer 8.
The fuel gas is supplied via 1 and the air is supplied via the air cleaner 12. The mixer 8 mixes fuel gas and air and supplies the mixed gas to the engine 5. Further, oil is supplied to the engine 5 from the oil tank 13, and the blow-by gas of the engine 5 is returned to the air passage on the upstream side of the mixer 8 via the oil separator 14. The engine 5 is started by the starting motor 15.

Further, the refrigerant circuit 6 fulfills a heat pump function by compressing and circulating the refrigerant to vaporize and liquefy it. This refrigerant circuit 6 includes a compressor 4 and a four-way valve 1
A base circuit 17 forming circuits up to 6; an outdoor circuit 18 connected to the base circuit 17 and arranged in the outdoor unit 2;
Further, it is constituted by an indoor circuit 19 connected to the outdoor circuit 18 and arranged in the indoor unit 3.

The base circuit 17 is connected to the discharge port side of the compressor 4, and the discharge side circuit 20 communicating with the first port 16a of the four-way valve 16 and the second port 16b of the four-way valve 16 are connected to the compressor 4. The suction side circuit 21 communicates with the suction port side. The oil separator 2 is provided in the discharge side circuit 20.
2 is installed, and oil is returned to the suction side circuit 21 via the oil return 23 by this oil separator 22.
An accumulator 24 is installed in the suction side circuit 21, and the accumulator 24 is installed in the gas bypass 2
5 is connected to the discharge side circuit 20 to prevent an abnormal rise in pressure. The gas bypass 25 is provided with a bypass valve 35.

An outdoor circuit 18 is connected to the third port 16c of the four-way valve 16, and the outdoor circuit 18 has a heat exchanger 26 having a refrigerant passage 26a and a hot water passage 26b.
An outdoor heat exchanger 27 is installed, and a distributor 28, a drier 29, an electronic expansion valve 36, and a strainer 37 are connected between the outdoor heat exchanger 27 and the indoor circuit 19.

An indoor heat exchanger 30 for exchanging heat in the room is connected to the indoor circuit 19, and the indoor heat exchanger 30 communicates with the fourth port 16d of the four-way valve 16 of the base circuit 17.

On the other hand, the hot water circuit 7 of the engine-driven heat pump device 1 having the refrigerant circuit 6 is constructed as follows. The hot water circuit 7 is an engine 5 that serves as a heat source for hot water.
And has an exhaust gas heat exchanger 31, a water pump 32, a radiator 33, and a water tank 34.

Therefore, as shown in FIG. 1, the engine-driven heat pump device 1 thus constructed operates the four-way valve 16 to operate the four-way valve 16 to operate the first port 16a and the third port 16a. Communicates with port 16c of the
The port 16d and the second port 16b are in communication with each other.

As a result, the compressor 4 is driven by the engine 5.
Is driven to compress the refrigerant, and the compressed high-temperature, high-pressure refrigerant gas is liquefied by the outdoor heat exchanger 27 of the outdoor unit 2 by being cooled by the outside air. The liquefied refrigerant is decompressed by the operation of the electronic expansion valve 36, and the refrigerant liquid having a low pressure takes heat from the indoor air in the indoor heat exchanger 30 of the indoor unit 3 and evaporates. A cooling effect is generated by the heat of vaporization at this time to cool the room. The evaporated refrigerant gas returns to the compressor 4 again,
Repeat the same cycle.

In addition, when operating as heating, as shown in FIG.
As shown in, the four-way valve 16 is operated to operate the first port 1
6a communicates with the fourth port 16d, and
The port 16c is connected to the second port 16b.

As a result, the compressor 4 is driven by the engine 5.
Is driven to compress the refrigerant, and the compressed high-temperature, high-pressure refrigerant gas is liquefied in the indoor heat exchanger 30 of the indoor unit 3 by being cooled by indoor air. At this time, the indoor air is warmed by the heat of condensation to produce a heating effect. The liquefied refrigerant is decompressed by the operation of the electronic expansion valve 36, the low-pressure refrigerant liquid deprives the heat of the outside air in the outdoor heat exchanger 27 of the outdoor unit 2, and further heats the engine cooling water in the heat exchanger 26. Take away and evaporate. The evaporated refrigerant gas returns to the compressor 4 again, and the same cycle is repeated.

A power supply for an engine-driven heat pump device is provided between an engine-driven heat pump device 1 for cooling and heating by circulating a refrigerant in a refrigerant circuit 6 by a compressor 4 driven by the engine 5 and a commercial power supply 100. The device 101 is interposed.

The engine-driven heat pump device power supply device 101 is constructed as shown in FIGS.
Is a block diagram of a power supply device for an engine-driven heat pump device, FIG. 4 is an operation flowchart of power supply, and FIG. 5 is an operation flowchart of power supply monitoring means.

The engine-driven heat pump power supply device 101 includes a storage battery 102 and a charging means 10 for converting the alternating current of the commercial power supply 100 into direct current and charging the storage battery 102.
3 and voltage detection means 1 for detecting the voltage of the commercial power supply 100
04, a DC / AC conversion means 105 for converting the direct current of the storage battery 102 into an AC, and the commercial power supply 100 when the voltage of the commercial power supply 100 is higher than a predetermined value. Is connected to the engine-driven heat pump device 1.

In this engine-driven heat pump device power supply device 101, for example, when the engine 5 is started, the commercial power supply 10 is used.
When the voltage of 0 decreases, the switching means 106 operates to supply power from the built-in storage battery 102 to the engine-driven heat pump device 1 to keep the output voltage constant. Also, commercial power source 1
Even when 00 has a power failure, the switching means 106 operates to supply power to the engine-driven heat pump device 1 from the built-in storage battery 102.

Further, the engine-driven heat pump power supply device 101 has a voltage comparison means 1 for comparing the voltage of the commercial power supply 100 and the output voltage of the storage battery 102 with a reference voltage.
07 and the storage battery 102 when the commercial power source 100 is below a predetermined level.
Power supply monitoring means 108 that outputs an operation stop signal of the engine-driven heat pump device 1 when the output voltage of the engine is less than a predetermined value.

In the engine-driven heat pump device power supply device 101, for example, when the commercial power supply 100 is out of power, it is detected that the output voltage of the storage battery 102 is below a predetermined level, and the engine-driven heat pump device 1 is detected. The operation stop signal is given to, and the operation stop signal is released, for example, when the power failure is restored.

Next, the power supply of the engine-driven heat pump power supply device 101 will be described with reference to the power supply operation flowchart of FIG. During normal operation of the engine-driven heat pump device 1, the voltage detection means 104 detects the voltage of the commercial power source 100, and in step a1 it is determined whether the input voltage is below a predetermined value. When the voltage of the commercial power source 100 is equal to or higher than a predetermined value, the switching means 106 operates to connect the commercial power source 100 to the engine-driven heat pump device 1 and the commercial power source 100 is supplied (step b1). At this time, the charging means 103 converts the alternating current of the commercial power source 100 into direct current and charges the storage battery 102.

On the other hand, in the engine-driven heat pump device 1, the engine 5 is started by the starting motor 15, and the voltage detecting means 104 detects the voltage of the commercial power source 100 by the operation of the starting motor 15. When the voltage of the commercial power source 100 drops below a predetermined value in step a1, the DC / AC converter operates at this time to convert the DC of the storage battery 102 into AC (step c1), and the switching device 106 operates to drive the storage battery 102 to the engine. The heat pump device 1 is connected (step d1), and the storage battery 102 is supplied with power. As described above, when the engine-driven heat pump device 1 requires a large amount of power, the storage battery 102 is used as a driving power source to keep the output voltage constant.

Therefore, the power supply device 101 for the engine-driven heat pump device can reduce the voltage drop when an overcurrent flows at the time of start-up, and the power supply of the commercial power supply 100 according to the normal operation. Even with the capacity, it is possible to prevent the voltage from being lowered at the time of startup.

Further, when the commercial power supply 100 is out of power due to electric work, inspection, etc., and the commercial power supply 100 has a voltage drop, the storage means 102 is connected to the engine-driven heat pump device 1 by the operation of the switching means 106 (step d
1), the power of the storage battery 102 is supplied, and the engine-driven heat pump device power supply device 101 is operated.

At this time, the voltage comparing means 107 compares the voltage of the commercial power source 100 and the output voltage of the storage battery 102 with the reference voltage, and judges whether the voltage of the commercial power source 100 is below a predetermined level (step a2). When the voltage of the commercial power source 100 is not lower than the predetermined value, the operation stop signal is not output in step b2.

Therefore, when the commercial power supply 100 loses power due to electrical work, inspection, etc., power is supplied from the storage battery 102 of the engine-driven heat pump device power supply device 101 to the engine-driven heat pump device 1 to cause a power failure. At any time, the engine-driven heat pump device 1 can be used. Thus, when it is necessary to continuously operate the engine-driven heat pump device 1, for example, the engine-driven heat pump device 1 operates continuously even when a power failure occurs.

Then, in step a2, the voltage of the commercial power source 100 is lower than a predetermined value, and the voltage of the commercial power source 100 decreases.
When the output voltage of the storage battery 102 becomes less than or equal to a predetermined value in step c2 during a power outage, the power supply monitoring means 108 operates in step d2 and outputs an operation stop signal of the engine-driven heat pump device 1. In other words, if you continue driving, the voltage will drop rapidly, and if you suddenly stop, the preset data and operation data stored in the remote controller, main body controller, etc. will be lost, but if you stop it, the voltage of the power supply unit will be maintained. , The memory is protected.

Further, the engine driven heat pump device 1 is prevented from being suddenly stopped due to, for example, a voltage drop or a power failure, so that the internal pressure of the refrigerant or the like does not remain in the refrigerant circuit or the like. If the internal pressure of the refrigerant or the like remains in the refrigerant circuit or the like, a load is constantly applied to the pipes and the pressure vessel forming the circuit, such as an accumulator, which causes the durability to be impaired.

Further, the power consumption of the storage battery 102 provided in the engine-driven heat pump device 1 is further protected,
When the voltage of the commercial power supply 100 is restored, the voltage comparison means 1
07 operates and the power supply monitoring means 108 releases the operation stop signal.

[0041]

As described above, the invention according to claim 1 is
When the engine of the engine-driven heat pump device is started, the storage battery is connected to the engine-driven heat pump device, and when a large amount of electric power is required, the storage battery is used as a drive power source, so that a commercial power source suitable for normal operation can be obtained. It is possible to drive the engine with the power capacity of, and the electricity bill can be reduced accordingly.

According to the second aspect of the present invention, when the output voltage of the storage battery falls below a predetermined level when the commercial power source is below a predetermined level, an operation stop signal of the engine-driven heat pump device is output. It is possible to prevent the engine-driven heat pump device from suddenly stopping due to a power failure or the like, and prevent the internal pressure of the refrigerant or the like from remaining in the refrigerant circuit or the like.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an engine-driven heat pump device during a cooling operation.

FIG. 2 is a schematic configuration diagram of the engine-driven heat pump device during heating operation.

FIG. 3 is a block diagram of a power supply device for an engine-driven heat pump device.

FIG. 4 is an operation flowchart of power supply.

FIG. 5 is an operation flowchart of the power supply monitoring means.

[Explanation of symbols]

 1 Engine Driven Heat Pump Device 4 Compressor 5 Engine 6 Refrigerant Circuit 100 Commercial Power Supply 101 Engine Driven Heat Pump Device Power Supply Device 102 Storage Battery 103 Charging Means 106 Switching Means

Claims (2)

[Claims] 1. A power supply device for an engine driven heat pump device interposed between a commercial power supply and an engine driven heat pump device for cooling and heating by circulating a refrigerant in a refrigerant circuit by a compressor driven by an engine. In, the storage battery, charging means for converting the alternating current of the commercial power source into direct current and charging the storage battery, and when the voltage of the commercial power source is equal to or higher than a predetermined value, the commercial power source is connected to the engine-driven heat pump device, A power supply device for an engine-driven heat pump device, comprising: switching means for connecting the storage battery to the engine-driven heat pump device when the temperature is below a predetermined level. 2. A voltage comparing means for comparing the voltage of the commercial power source and the output voltage of the storage battery with a reference voltage, and the engine drive when the output voltage of the storage battery becomes less than a predetermined value when the voltage of the commercial power source is less than a predetermined value. The power supply device for an engine-driven heat pump device according to claim 1, further comprising power supply monitoring means for outputting an operation stop signal of the heat pump device.