KR102044308B1 - Gas engine-driven heat pump type air conditioning and hot water suppling apparatus - Google Patents

Abstract

The present disclosure relates to a gas heat pump type air conditioning and hot water supply device that can simultaneously provide additional functions such as hot water supply as well as an air conditioning function for indoor cooling.
The present disclosure relates to a gas tank in which compressed gas is stored, a gas engine connected to the gas tank and driven by gas supplied from the gas tank, and a compressor connected to a shaft of the gas engine and compressing a refrigerant. A condenser connected to the compressor and condensing the refrigerant discharged from the compressor, an expansion valve connected to the condenser and expanding the refrigerant passing through the condenser, and both ends of the condenser connected to the expansion valve and the compressor, respectively, An evaporator for evaporating the expanded refrigerant from the valve and providing it back to the compressor, an air conditioner for heat-exchanging the indoor air sucked into the evaporator and being discharged back to the evaporator, and connected to the gas tank in parallel; Instantaneous water heater that generates hot water by using the gas supplied from the gas tank, In one embodiment, a gas heat pump type air conditioning and hot water supply device including a hot water tank connected to the instantaneous water heater and storing hot water generated by the instantaneous water heater is stored.

Description

GAS ENGINE-DRIVEN HEAT PUMP TYPE AIR CONDITIONING AND HOT WATER SUPPLING APPARATUS}

The present disclosure relates to a gas heat pump type air conditioner for performing indoor air conditioning through a refrigeration cycle in which refrigerant is circulated by a compressor driven by a gas engine.

Unless otherwise indicated herein, the contents described in this identification are not prior art to the claims of this application and the description in this identification is not admitted to be prior art.

In general, a heat pump refers to absorbing heat from a low temperature heat source and transferring it to a high temperature heat source, and using a low temperature heat source is generally referred to as a freezer and using a high temperature heat. Generally referred to as heat pump.

Heat pumps are classified into various methods such as compression, chemical formula, absorption, and adsorption according to the method of absorbing heat and radiating heat. In particular, the use of an electric motor as a power source for driving a compressor in a compression type heat pump is called an electric heat pump (EHP), and a gas heat pump (Gas engine) is used as a driving source for driving a compressor. driven heat pump (GHP).

Among them, the gas heat pump type air conditioner operates the compressor by the power of a gas engine using gas such as LNG or LPG as a heat source to liquefy and vaporize as the refrigerant is circulated along the refrigerant pipe between the indoor unit and the outdoor unit. Repeatedly refers to an air conditioning system used as a cooler in summer and a heater in winter.

As an example of such a gas heat engine type air conditioner, Korean Patent Publication No. 10-2003-0019228 (published on June 6, 2003) includes a compressor for circulating a refrigerant to form a refrigeration cycle by using a gas engine as a driving source, and an outdoor unit installation space. A bypass conduit provided at a periphery of the gas engine and branched from the gas coolant system via a flow path switching means, and recovers the waste heat discharged from the gas engine to the engine coolant, and heats the refrigerant by the engine coolant. A gas heat pump type air conditioner for improving heating capability is disclosed.

In addition, Korean Patent Publication No. 10-2005-0014498 (published on Feb. 7, 2005) discloses an engine for driving a compressor of a refrigerant circuit, a circulation pump forcibly circulating coolant into the engine, and heat radiation for cooling the coolant discharged from the engine. A gas heat pump type air conditioner having a device and a thermo valve for selectively opening and closing a flow path in accordance with a temperature of cooling water in the engine to selectively allow the cooling water discharged from the engine to flow into the circulation pump or the heat radiating device. One end is connected to the discharge side of the engine and the other end is connected to the intake side of the heat dissipation device so that the coolant discharged from the engine flows to the heat dissipating device by bypassing the thermovalve during injection. Gas heat pump type air including a bypass line for bypassing the suction side of the device The firearm is disclosed.

In addition, Korean Patent Publication No. 10-2003-0084289 (published on November 1, 2003) discloses a plurality of indoor units that provide hot air or warm air into an indoor unit, and an outdoor unit that compresses and transfers refrigerant to provide cold or warm air to each indoor unit. And an outdoor unit for cooling the heat generated by the indoor unit and the outdoor unit, wherein the outdoor unit has a gas engine using gas as a fuel and a compressor driven by the outdoor unit, and oil included in the refrigerant at one side of the compressor It has an oil filter for filtering the oil filter, has a four-way valve in front of the oil filter, the first refrigerant circulation pipe connected to the four-way valve is connected to the indoor unit, the second refrigerant circulation pipe connected to the four-way valve is connected to the first storage tank. The third refrigerant circulation pipe connected to the four-way valve is connected to the refrigerant heat sink of the cooling chamber and the fourth refrigerant circulation pipe connected to the indoor unit. After being connected to the refrigerant storage tank is connected to the refrigerant heat sink of the cooling chamber outside the engine through the heat exchanger for the cooling water, the first storage tank is connected to the fifth refrigerant circulation pipe, the first storage tank is connected to the compressor to the fifth refrigerant circulation pipe. The second storage tank connected to the first storage tank is connected to the refrigerant heat dissipation plate of the cooling chamber outside as a sixth refrigerant circulation pipe, and the gas engine is a cooling water supply pipe and a cooling water recovery pipe, and the engine cooling water heat sink of the cooling outdoor unit. The coolant feed pipe has a first control valve for connecting the coolant to the engine coolant return pipe without passing through the engine coolant heat sink, and the coolant feed pipe transfers the coolant to the engine heat exchanger without passing through the engine coolant heat sink. While having a second control valve, the coolant recovery pipe has a coolant pump and a coolant temperature sensing To have, the group engine-coolant-water heat sink and between the coolant pump, the second coolant recovery air conditioner using a gas engine heat pump, characterized in that so as to have a pipe having a cooling water storage tank is disclosed.

However, in the case of the gas heat pump type air conditioner described above, only the air conditioning function for cooling or heating indoors is faithfully configured, and additional functions such as hot water supply cannot be provided at the same time.

Patent Document 1: Republic of Korea Patent Publication No. 10-2003-0019228 (2003.03.06.published) Patent Document 2: Republic of Korea Patent Publication No. 10-2005-0014498 (published on Feb. 7, 2005) Patent Document 3: Republic of Korea Patent Publication No. 10-2003-0084289 (published on November 1, 2003)

The present invention aims to provide a gas heat pump type air conditioning and hot water supply device capable of simultaneously providing additional functions such as hot water supply as well as air conditioning function for indoor cooling.

In addition, the heat efficiency can be significantly increased, as well as to provide a gas heat pump type air conditioning and hot water supply device to increase the efficiency of the refrigeration cycle.

In addition, it is not limited to the technical problems as described above, it is obvious that another technical problem may be derived from the following description.

Disclosed is a gas tank in which compressed gas is stored, a gas engine connected to the gas tank and driven by gas supplied from the gas tank, and connected to a shaft of the gas engine to compress a refrigerant. A compressor, a condenser connected to the compressor and condensing the refrigerant discharged from the compressor, an expansion valve connected to the condenser and expanding the refrigerant passing through the condenser, and both ends of the condenser connected to the expansion valve and the compressor, respectively. An evaporator for evaporating the refrigerant expanded from the expansion valve and providing the compressed air back to the compressor; an air conditioner having the built-in evaporator, inhaling indoor air, exchanging heat with the evaporator, and discharging it back to the room; Instant hot water heater that generates hot water by using gas supplied from tank as fuel, and Instantaneous water heater is connected to present a gas heat pump type air conditioning and hot water supply apparatus including a hot water tank the hot water that is stored generated by the instantaneous water heater as one embodiment.

The gas heat pump type air conditioning and hot water supply device according to the present disclosure can be provided simultaneously with additional functions such as hot water supply as well as air conditioning function for indoor cooling, thereby increasing convenience of use and satisfying the complex needs of users. have.

In addition, the gas heat pump type air conditioning and hot water supply device according to the disclosure, the heat efficiency can be significantly increased as the waste heat of the gas engine or instantaneous water heater is absorbed through the hot water storage tank, and the efficiency of the refrigeration cycle through the complete refrigerant evaporation It has the advantage of being.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a block diagram of a gas heat pump type air conditioning and hot water supply device according to an embodiment of the disclosed contents.
2 to 5 is another block diagram of a gas heat pump type air conditioning and hot water supply apparatus according to an embodiment of the disclosed contents.

Hereinafter, with reference to the accompanying drawings looks at the configuration, operation and effects of the gas heat pump type air conditioning and hot water supply apparatus according to a preferred embodiment. For reference, in the drawings, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals throughout the specification refer to the same components and reference numerals for the same components in the individual drawings will be omitted.

1 is a block diagram of a gas heat pump type air conditioning and hot water supply apparatus according to an embodiment of the disclosed contents.

Gas heat pump type air conditioning and hot water supply apparatus according to an embodiment of the present disclosure is connected to the gas tank 10 and the gas tank 10, the compressed gas is stored, as shown in Figure 1 and the gas tank 10 And a gas engine 20 driven by gas supplied from the fuel, a compressor 30 connected to the shaft 21 of the gas engine 20 to operate and compress the refrigerant, and a compressor 30 connected thereto. A condenser 40 for condensing the refrigerant discharged from the compressor 30, an expansion valve 50 connected to the condenser 40 and expanding the refrigerant passing through the condenser 40, and both ends of the expansion valve 50 and the compressor. The evaporator 60 and the evaporator 60 are built-in, respectively, connected to the 30 and evaporate the refrigerant expanded by the expansion valve 50 to the compressor 30 again, and the indoor air is sucked into the evaporator 60. The air conditioner 70 and the gas tank 10 are connected in parallel to the heat exchanger and discharged back into the room. Instantaneous water heater 80 to generate hot water by using the gas supplied from the fuel 10, and a hot water tank 90 is connected to the instantaneous water heater 80 and the hot water generated by the instantaneous water heater 80 is stored. do.

Here, the gas tank 10 is a component that is stored in a state where the gas to be used as the fuel of the gas engine 20 and the instant water heater 80 is compressed at a high pressure. The term 'tank' used in the gas tank 10 includes all kinds of gas containers capable of storing compressed gas.

The gas stored in the gas tank 10 is preferably liquefied petroleum gas (LPG), but not limited thereto, and all kinds of gases used as fuel may be applicable. In addition, the gas tank 10 is preferably formed of a small gas tank, that is, bulk, having a capacity such as 1 ton, 3 ton or 5 tons.

The gas engine 20 is connected to the above-described gas tank 10. The gas engine 20 is a constituent member that generates power for rotating the shaft using gas supplied from the gas tank 10 as fuel. The gas engine 20 is, for example, an internal combustion engine using gas such as liquefied petroleum gas (LPG) as a fuel. The gas engine 20 is mainly used by improving parts of a vaporizer in a gasoline engine for gas fuel.

Such a gas engine 20 is already known in the gas heat pump art, and further details will be omitted here for the sake of simplicity.

The compressor 30 is connected to and operated by the shaft 21 of the above-described gas engine 20. Compressor 30 is a component member that serves to generate a circulating pressure for refrigerant circulation as the refrigerant is compressed and discharged at a high pressure.

Compressor 30 is applicable to compressors of any configuration, such as compressors of known construction, such as reciprocating compressors, rotary compressors, scroll compressors, as well as to enable the compression of refrigerant.

The condenser 40 is connected to the compressor 30 described above. The condenser 40 corresponds to an outdoor heat exchanger that condenses the refrigerant discharged from the compressor 30 through heat exchange with outdoor air at the time of cooling, and may be formed as an air-cooled heat exchanger including a fin tube.

The expansion valve 50 is connected to the condenser 40 described above. Expansion valve 50 is a component that expands the refrigerant passing through the condenser 40 at the time of cooling, it is preferably formed of an electronic expansion valve.

An evaporator 60 is connected between the expansion valve 50 and the compressor 30 described above. The evaporator 60 corresponds to an indoor heat exchanger which provides the refrigerant expanded by the expansion valve 50 to the compressor 30 by evaporating the refrigerant expanded through the heat exchange with the indoor air, and may be formed as an air-cooled heat exchanger including a fin tube. Do.

The compressor 30, the condenser 40, the expansion valve 50 and the evaporator 60 described above constitute a known refrigeration cycle, and have been described on the basis of the cooling operation, but are provided on the rear end of the compressor 30. Cooling operation is also possible through the addition of a valve and a heating expansion valve. In this case, the refrigerant discharged from the compressor 30 by changing the flow path of the four-way valve is sequentially introduced into the compressor through the evaporator 60, the heating expansion valve and the condenser 40 in the air conditioner 70, and the evaporator 60 is It becomes the role of the condenser 40 and the condenser 40 is to serve as the evaporator 60.

Such cooling and heating operation is already known in the field of refrigeration cycle, and for the sake of brevity of the specification, further detailed description will be omitted.

In addition, the above-described evaporator 60 is installed in the air conditioner 70. The air conditioner 70 is a constituent member that sucks indoor air, exchanges heat with the evaporator 60, and discharges the air back into the room.

The air conditioner 70 includes a case 71, an intake grill 73 provided on one side of the case 71, an exhaust grill 75 provided on the other side of the case 71, and an inside of the case 71. It is provided and includes a fan 77 for generating a suction force so that the indoor air is sucked into the interior through the intake grill 73 and discharged back to the interior through the exhaust grill (75). The evaporator 60 is located between the intake grill 73 and the exhaust grill 75.

The air conditioner 70 may be formed in one of a conventional stand type air conditioner, a wall-mounted air conditioner, and a ceiling type air conditioner.

Instantaneous water heater 80 is connected to the above-described gas tank 10 in parallel. The instantaneous water heater 80 is a constituent member that generates hot water by using the gas supplied from the gas tank 10 as a fuel, and may be formed as a general gas instantaneous water heater including a gas burner 81 therein.

In addition, the above-mentioned instant water heater 80 is connected to the hot water tank 90. The hot water tank 90 corresponds to a kind of hot water tank in which hot water generated by the instant water heater 80 is temporarily stored for stable supply. The hot water tank 90 is made of stainless steel and the outer wall is preferably insulated for thermal insulation. . In addition, according to the embodiment, a separate heating heater may be installed in the hot water tank 90.

Gas heat pump type air conditioning and hot water supply apparatus according to an embodiment of the present disclosure performs the air conditioning function for the indoor air conditioning as the air conditioner 70 is driven by the gas heat pump method based on the gas engine 20.

In addition, the gas heat pump type air conditioning and hot water supply device according to an embodiment of the disclosure is a hot water tank for use after the hot water is heated by hot water heater 80 using the gas supplied from the gas tank 10 as a fuel As it is stored at 90, additional functions such as hot water supply may be provided, and hot water may be stably supplied due to hot water storage by the hot water tank 90.

In addition, the above-mentioned hot water tank 90 may be used as a waste heat recovery unit for absorbing waste heat of the gas engine 20 or the instantaneous water heater 80 and may also be used as a refrigerant heater for increasing the compression efficiency in the compressor 30. Do. 2 to 5 is a block diagram of a gas heat pump type air conditioning and hot water supply apparatus including such a hot water tank.

2, the exhaust pipe 23 of the gas engine 20 flows through the hot water tank 90 for waste heat recovery. In this case, as the thermal energy contained in the hot exhaust gas discharged from the gas engine 20 is absorbed by the hot water in the hot water tank 90, the overall thermal efficiency may be increased.

3, the exhaust pipe 83 of the instantaneous water heater 80 flows through the hot water tank 90 for waste heat recovery. In this case, as the thermal energy contained in the hot exhaust gas discharged from the instantaneous water heater 80 is absorbed by the hot water in the hot water tank 90, the overall thermal efficiency is increased.

Also, referring to Figure 4, the refrigerant pipe connecting between the evaporator 60 and the compressor 30 flows through the hot water tank 90. In this case, as the refrigerant passing through the evaporator 60 is heated again to a high temperature gas state by hot water in the hot water tank 90 immediately before the inflow to the compressor 30, the compression efficiency of the compressor 30 is increased and at the same time, a freezing cycle. The efficiency of is increased.

5, the exhaust pipe 23 of the gas engine 20 flows through the hot water tank 90 for waste heat recovery, and the exhaust pipe 83 of the instantaneous water heater 80 receives the hot water tank 90 for waste heat recovery. In order to increase the compression efficiency of the compressor (30) through the refrigerant pipe connecting between the evaporator 60 and the compressor 30 flows through the hot water tank (90).

In this case, the heat energy contained in the hot exhaust gas discharged from the gas engine 20 and the heat energy contained in the hot exhaust gas discharged from the instantaneous water heater 80 are absorbed by the hot water in the hot water tank 90. Thermal efficiency is increased.

In addition, as the refrigerant passing through the evaporator 60 is heated again to a high temperature gas state by hot water in the hot water tank 90 immediately before the inflow to the compressor 30, the compression efficiency of the compressor 30 increases and the efficiency of the refrigeration cycle. Is increased.

Although not shown, a refrigerant pipe connecting between the compressor 30 and the condenser may flow through the hot water tank 90. In this case, the heat contained in the high temperature refrigerant passing through the compressor 30 maintains the water in the hot water tank 90 at a constant temperature, and at the same time, the condenser 40 is more easily condensed through the pre-cooling of the refrigerant. To get up.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the embodiments described in the specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention and represent all of the technical idea of the present invention. It is to be understood that there may be various equivalents and variations in place of them at the time of the present application. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from an equivalent concept should be construed as being included in the scope of the present invention.

10 gas tank
20: gas engine
21: axis
23: exhaust pipe
30: compressor
40: condenser
50: expansion valve
60: evaporator
70: air conditioner
71: case
73: intake grill
75: exhaust grill
77: fan
80: instant water heater
81 gas burner
83: exhaust pipe
90: hot water tank

Claims (5)

A gas tank in which compressed gas is stored;
A gas engine connected to the gas tank and driven by using gas supplied from the gas tank as a fuel;
A compressor connected to the shaft of the gas engine and operated to compress the refrigerant;
A condenser connected to the compressor and condensing the refrigerant discharged from the compressor;
An expansion valve connected to the condenser and expanding the refrigerant passing through the condenser;
An evaporator whose both ends are connected to the expansion valve and the compressor, respectively, to evaporate the refrigerant expanded in the expansion valve and provide it back to the compressor;
An air conditioner having a built-in evaporator and discharging the indoor air sucked into the evaporator and discharging the indoor air to the evaporator;
An instantaneous water heater connected in parallel to the gas tank and generating hot water using the gas supplied from the gas tank as a fuel; And
A hot water tank connected to the instantaneous water heater and storing hot water generated by the instantaneous water heater,
The exhaust pipe of the gas engine flows through the hot water tank for waste heat recovery, and the exhaust pipe of the instantaneous water heater flows through the hot water tank for waste heat recovery, and a refrigerant pipe connecting the evaporator and the compressor connects the hot water tank. Gas heat pump type air conditioning and hot water supply device flowing through. delete delete delete The method according to claim 1,
The gas tank is a gas heat pump type air conditioning and hot water supply device, characterized in that the liquefied petroleum gas (LPG) bulk of 1 to 5 tons capacity.

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