KR200260439Y1 - Gas engine driven heat pump outdoor unit having pre-heating apparatus and apparatus and removable casing apparatus - Google Patents

Abstract

The present invention relates to a gas engine driven heat pump (hereinafter referred to as GHP) outdoor unit having a preheating device and a detachable case device. The purpose of the present invention is to install a preheating device in addition to the preheating device of the existing GHP outdoor unit to improve the efficiency of the evaporator in winter. The present invention provides a GHP outdoor unit having a case device configured to be fully assembled so as to facilitate replacement and cleaning of parts during maintenance.

In the GHP air conditioner, the exhaust gas exhaust pipe 1 discharged from the gas engine installed inside the GHP outdoor unit is formed so as to be supplied to the front end of the heat exchanger, and the outside of the exhaust pipe is formed outside. The heat pipe evaporation unit 21 and the heat pipe condensation unit 22 are divided around the partition wall 24 installed at the center of the case 23 to prevent the exhaust gas and the outside air from mixing. The heat pipe heat exchanger (2) consisting of a configuration is installed, and the panels forming the casing of the GHP outdoor unit are configured to be detachable in each direction.

Description

Gas engine driven heat pump outdoor unit having pre-heating apparatus and apparatus and removable casing apparatus

The present invention relates to a gas engine driven heat pump (hereinafter referred to as a GHP) outdoor unit having a preheating device and a detachable case device. The present invention relates to a GHP outdoor unit having a case device configured to be fully assembled to increase and facilitate replacement and cleaning of parts during maintenance.

Heat conversion technology using heat energy is a technology for releasing or absorbing heat energy in a target area using heat energy instead of electricity or chemical reaction. Heat conversion technology using heat energy such as absorption system technology, dehumidification system technology, and gas-driven system technology to be.

The absorption system technology is a technology capable of cooling and heating by using LNG, waste heat, etc. as a driving heat source instead of electric energy by using the principle that the refrigerant vapor is absorbed by the difference in the vapor pressure of the refrigerant.

The dehumidification system technology is a system technology for effectively treating the latent dehumidification load of the entire cooling load by using a desiccant having affinity for moisture in the air. It is used as a combined hybrid.

The gas-driven system technology is a heat pump cooling and heating system technology for replacing electric drive compression type with gas engine drive compression type for leveling and power leveling of gas demand during winter season using natural gas as a heat source.

The gas-driven system technology is divided into a technology using a sterling engine, a VM technology and a gas engine driven heat pump (GHP) .A high efficiency heat exchange technology is very important in a sterling engine and a VM technology. In the technology, high efficiency compressor technology and heat pump system technology are important.

The driving principle of the basic heat pump to the gas system using the GHP as described above is as follows.

Heat alone cannot move from a low temperature to a high temperature, and it takes work to move heat. Just as a water pump is a machine that pumps water from a low to a high position, a heat pump is a device that can move heat from a low temperature to a high temperature. The configuration and operation method of the cycle is the same as that of a freezer, which is a freezer only for the use of low temperature heat, and a heat pump for the use of high temperature heat.

Heat pumps are classified into compression type, chemical formula, absorption type, and absorption type according to the principle of absorbing heat and dissipating heat. Among them, the type of heat pump is a compression type heat pump.

This compressed heat pump can be thought of as a reverse cycle of a cooling system called an air conditioner. In other words, the air conditioner for cooling only absorbs heat from the heat exchanger of the indoor unit installed indoors and dissipates heat by using the heat exchanger of the outdoor unit installed outdoors. On the contrary, the heat pump absorbs heat from the heat exchanger of the outdoor unit and is installed indoors. Principle of heat dissipation using heat exchanger of indoor unit.

The basic components of the compressed heat pump cycle are divided into four elements: evaporator, which is a low temperature heat exchanger, a condenser, which is a high temperature heat exchanger, and an expansion valve. The refrigerant, which is a working fluid, circulates continuously changing evaporation, compression, condensation, and expansion. The low-temperature low-pressure wet steam refrigerant evaporates in the evaporator, absorbs latent heat of evaporation, and is discharged into the low-temperature, low-pressure dry saturated steam refrigerant evaporated. The refrigerant in the low temperature low pressure dry saturated vapor state discharged from the evaporator is adiabatically compressed in the compressor and becomes a refrigerant in the high temperature and high pressure superheated steam state and flows into the condenser.

The high temperature and high pressure superheated steam introduced into the condenser releases latent heat of condensation and becomes a refrigerant in a high temperature and high pressure saturated liquid state and flows into the expansion valve. Saturated liquid refrigerant at high temperature and high pressure expands isoenthalally at the expansion valve and flows into the evaporator as the refrigerant at low temperature and low pressure. Generally, an evaporator, which is a low temperature heat exchanger, is installed outdoors, and is installed in a condenser that is a high temperature heat exchanger. The low temperature evaporator is installed outdoors to absorb heat from the surroundings (called a heat source, and a lot of air is commonly used in homes), and the high temperature condenser is installed indoors to release heat to the surroundings (called heat sinks). To be used for heating)

Although only the basic driving principle for heating has been described above, it is obvious that both heating and cooling can be performed by changing the refrigerant condenser and reversing the role of the condenser and the evaporator in the configuration of the outdoor unit and the indoor unit by using a 4-way valve. Do.

1 is a schematic diagram illustrating a cooling principle of a general GHP system. The refrigerant, which is in a gaseous state of high temperature and high pressure by a compressor driven by a gas engine, condenses in an outdoor unit (condenser) and radiates heat and passes through an expansion valve. At the same time, it becomes a liquid at low temperature and low pressure, and when it enters an indoor unit (evaporator), it is a cycle for cooling by taking evaporation heat from the hot air in the room and vaporizing it.

Figure 2 is a schematic diagram illustrating the heating principle of a general GHP system, the refrigerant having a flow opposite to the cooling cycle (Cycle) by a four-way valve is a gas state of high temperature and high pressure in the compressor to the indoor unit (condenser) It is a cycle that heats while evaporating by taking heat from an outdoor unit (evaporator, evaporator) as it becomes a low-temperature low-pressure liquid state as it flows into the condenser and passes through an expansion valve.

Also, when the outside air temperature is significantly lower than the evaporation temperature of the refrigerant during heating operation, if the latent heat of evaporation cannot be obtained from the outside air, the heating performance becomes difficult and even the composition of the heating cycle becomes difficult. Below the set temperature, a device that raises the temperature of the outside air supplied to the evaporator by installing a heat exchanger in front of the evaporator using waste heat from the engine coolant.

That is, by forming a flow path to a heat exchanger installed in front of an evaporator by supplying a high temperature heat source generated from a gas engine engine radiator to heat contact with the heat source of the heat exchanger and the incoming air to raise the air temperature, and then supply it to the evaporator. .

However, the conventional preheating system as described above has a disadvantage in that its preheating performance is not satisfactory in a winter season such as a cold weather.

That is, when the outside air temperature is significantly lower than the evaporation temperature of the refrigerant during the heating operation, when the latent heat of evaporation cannot be obtained from the outside air, there is a disadvantage that it becomes difficult to compose the heating cycle as well as the heating performance.

In addition, the conventional GHP outdoor unit maintains the parts of the gas engine, compressor blower, evaporator, exhaust gas heat exchanger, etc., which are installed inside, when the parts are replaced and cleaned during the future maintenance. There is a disadvantage that it takes a lot of time to repair and is inefficient due to the inconvenience of workers.

The purpose of the present invention for solving the above problems is to install a preheating device in addition to the preheating device of the existing GHP outdoor unit to increase the efficiency of the evaporator in the winter, and to completely replace and clean the parts during maintenance The present invention provides a gas engine driven heat pump outdoor unit having a prefabricated case device.

1 is a schematic diagram illustrating a cooling principle of a general GHP system,

2 is a schematic diagram illustrating a heating principle of a general GHP system,

3 is a schematic view showing the principle of the auxiliary heating device through the exhaust heat recovery of the engine during heating using the GHP system of the present invention,

Figure 4 is a schematic diagram showing a heat exchange system diagram of the heat pipe used in the auxiliary heating device of the present invention,

Figure 5 is a block diagram showing a check device for maintenance of the subject innovation GHP.

<Description of the symbols for the main parts of the drawings>

(1): exhaust pipe (2): heat pipe heat exchanger

(3): frame (4): panel

(5): Hex bolt (6): Stopper

21: heat pipe evaporator 22: heat pipe condenser

23: case 24: bulkhead

(200): heat pipe

If described in detail in connection with the accompanying drawings the configuration and the operation of the embodiment of the present invention to achieve the object as described above and to perform the task for removing the conventional drawbacks.

3 is a schematic view showing the principle of the auxiliary heating device through the exhaust heat recovery of the engine during heating using the GHP system of the present invention, when the outside air temperature during heating operation is significantly lower than the evaporation temperature of the refrigerant can not obtain the latent heat of evaporation from the outside air In addition to the deterioration of the heating performance, even the configuration of the heating cycle (Cycle) becomes difficult.

Therefore, in order to compensate for the outside temperature, it is equipped with a system that recovers the waste heat of the engine coolant below the set temperature when heating and additionally recovers the exhaust heat of the engine and pre-heats the outside air under any extreme conditions in winter. Heating can be performed without deterioration of the engine. The composition is as follows.

From a gas engine that powers the inside, a compressor that provides compression, a four-way valve to switch the flow path, an evaporator (condenser) that evaporates the refrigerant, and a radiator that cools the high-temperature engine coolant generated during operation of the gas engine. In the GHP air-conditioning unit which is supplied with a heat source, a heat exchanger is installed in front of the evaporator is preheated to the outside air, the GHP outdoor unit consisting of a case surrounding it, and an indoor unit consisting of a condenser (evaporator) for condensing the refrigerant,

Position the exhaust pipe for exhaust gas discharged from the gas engine installed inside the GHP outdoor unit to be supplied to the front end of the heat exchanger, and heat pipe evaporate around the partition wall to prevent the exhaust gas and the outside air from mixing at the front end of the exhaust pipe. The heat pipe is divided into a part and a condenser so that the exhaust gas is supplied, the exhaust gas is discharged only to the evaporation part of the heat pipe, and the cold outside air is supplied to the heat exchanger through the heat pipe condensation part. .

Of course, the exhaust direction of the exhaust gas is positioned to face outward from the inside of the outdoor unit.

4 is a schematic view showing a heat exchange system diagram of a heat pipe used in the auxiliary heating device of the present invention, showing a plan view and one side cross-sectional view, and exhausting the central portion of the case 23 forming the outside of the heat pipe heat exchanger 2. The evaporation portion 21 and the condensation portion 22 of the heat pipe are divided around the partition 24 to prevent the mixing of gas and outside air, and a plurality of heat pipes 200 are provided inside the case. Showing the installed state,

The exhaust gas supplied from the gas engine passes through the evaporation unit 21 of the heat pipe, and cold outside air flows through the condensation unit 22 of the heat pipe.

When the exhaust gas of the GHP gas engine passes through the evaporator 21 of the heat pipe to heat the refrigerant sealed in the heat pipe 200, the refrigerant obtained by the latent heat of vaporization is vaporized to heat the heat pipe condenser 22. Is moved to.

At this time, the cold air introduced from the outside of the GHP outdoor unit passes through the condensation unit 22 of the heat pipe, takes out the latent heat of evaporation of the refrigerant, condenses the refrigerant again, and the heated air is supplied with a heat source from the radiator of the gas engine to heat the air. It is preheated again through the air conditioner and then introduced into the evaporator of the GHP outdoor unit.

In order to maintain the cycle of the heat pipe heat exchanger (2), the liquid level of the heat pipe condenser is higher than the liquid level of the evaporator so that the heat transfer is completed, and the condensed condensed water is allowed to recover naturally to the heat pipe evaporator. .

5 is a block diagram showing the maintenance device for the maintenance of the present invention GHP, the parts of the gas engine, compressor blower, evaporator, exhaust gas heat exchanger, etc. installed in the GHP outdoor unit during the future maintenance Instead of the existing one-piece casing for easy replacement and cleaning, manufactured as a fully assembled, the panel forming the case of the GHP outdoor unit is configured to be removable in all directions.

In detail, when the panels constituting the case of the GHP outdoor unit are detached in each direction, a plurality of nuts formed on the frame when fixing each panel 4 attached to the frame 3 constituting the skeleton of the GHP outdoor unit case ( Hexagon bolt (5) is inserted into the hex bolt (5) and a stopper (6) positioned between the hex bolt (5) and the frame (3) to secure the panel (4) at one end, hex bolt (5) Is coupled to the nut part of the frame through the stopper 6 so that the stopper fixes each panel.

Therefore, when assembling the GHP outer casing panel, it is manufactured as a fully assembled type so that the panel can be easily detached with one hexagon wrench without any additional parts or tools. Streamlined.

The present invention is not limited to the above-described specific preferred embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

The present invention as described above is configured to recover the waste heat of the engine coolant below the set temperature at the time of heating to compensate for the outside temperature and additionally recover the exhaust heat of the engine to configure the pre-heating of the outside air in winter The advantage of being able to perform heating without deterioration of the engine under the circumstances,

When assembling the GHP outer casing panel, it is fully assembled so that the panel can be easily detached with a single hexagon wrench without any parts or tools, eliminating the need for a separate door, reducing the working time for future maintenance and maximizing the convenience of the operator. It is such a design that it is expected that the industrial applicability is greatly expected.

Claims (3)

From a gas engine that powers the inside, a compressor that provides compression, a four-way valve to switch the flow path, an evaporator (condenser) that evaporates the refrigerant, and a radiator that cools the high-temperature engine coolant generated during operation of the gas engine. It is provided with a heat exchanger that receives a heat source, is installed in front of the evaporator, and preheats the incoming air, and consists of a gas engine driven heat pump (GHP) outdoor unit made of a case surrounding it, and an indoor unit including a condenser (evaporator) that condenses refrigerant. In a gas engine driven heat pump (GHP) air conditioning system, A case (23) is formed so that the exhaust gas discharge exhaust pipe (1) discharged from the gas engine installed inside the gas engine driving heat pump (GHP) outdoor unit is supplied to the front end of the heat exchanger, and the outside is formed at the front end of the exhaust pipe (23). The heat pipe evaporation unit 21 and the heat pipe condensation unit 22 are divided into a heat pipe evaporation unit 21 and a heat pipe condensation unit 22 around the partition 24 to prevent mixing of the exhaust gas and the outside air in the center of the heat. The pipe heat exchanger (2) is installed, and the exhaust gas is supplied through the exhaust gas, so that the exhaust gas is discharged only toward the evaporation unit 21 of the heat pipe, and the cold outside air is exchanged through the heat pipe condenser unit 22. To be fed to the A gas engine driven heat pump outdoor unit having a preheating device and a detachable case device, wherein the panel forming the case of the gas engine driven heat pump (GHP) outdoor unit is detachable in each direction. The method of claim 1, In order to maintain the cycle of the heat pipe heat exchanger 2 installed inside the gas engine driving heat pump (GHP) outdoor unit, the liquid level of the heat pipe condenser 22 is set higher than that of the heat pipe evaporator 21. A gas engine driven heat pump outdoor unit having a preheating device and a removable case device, wherein the condensed water condensed after the heat transfer is configured to be naturally recovered toward the heat pipe evaporator. The method of claim 1, Hexagon bolts (7) inserted into a plurality of nuts (not shown) formed in the frame when fixing each panel (6) attached to the frame (5) forming the skeleton of the gas engine drive heat pump (GHP) outdoor unit case and And a stopper (8) positioned between the hexagon bolt and the frame to fix the panel at one end thereof, wherein the gas engine drive heat pump outdoor unit has a preheating device and a detachable case device.