WO2021040308A1

WO2021040308A1 - Exhaust apparatus for gas engine heat pump

Info

Publication number: WO2021040308A1
Application number: PCT/KR2020/011002
Authority: WO
Inventors: 이진우; 정호종
Original assignee: 엘지전자 주식회사
Priority date: 2019-08-23
Filing date: 2020-08-19
Publication date: 2021-03-04
Also published as: KR20210023496A

Abstract

An exhaust apparatus is disclosed. The exhaust apparatus comprises: a first tank having a closed upper surface and an open lower surface; a second tank having a closed lower surface and an open upper surface, positioned below the first tank and connected to the first tank; a pipe installed inside the first tank, extending from the first tank to the second tank and having at least one hole formed therein; an inlet pipe communicating with the pipe from outside of the first tank; a first outlet pipe enabling communication between the inside and outside of the first tank; a second outlet pipe enabling communication between the inside and outside of the second tank; and a funnel installed in the second tank and positioned on the lower side of the pipe.

Description

Exhaust device for gas engine heat pump

The present invention relates to an exhaust device used in a device for driving a heat pump with a gas engine.

The heat pump refers to a system that supplies heat or absorbs heat to a required place by using a refrigerant circulation cycle. A heat pump is a device that compresses a refrigerant by driving a compressor and circulates the compressed refrigerant to a condenser, an expansion valve, and an evaporator to exchange heat with other fluids.

A gas engine heat pump is a device that drives a gas engine to drive a compressor. For example, a belt is connected between the engine and the compressor, and the compressor is driven to allow the refrigerant to circulate through the heat pump.

In the case of driving a gas engine, exhaust gas combusted and discharged from the engine contains a lot of heat, and the discharge pressure may also be considerable. An exhaust system is required to cool these exhaust gases and reduce noise caused by pressure changes.

Korean Patent Publication No. 10-2006-0099296 discloses a drain filter for an air conditioner that can be more simplified and effectively utilize space by using a circular shape as an optimal design condition for the drain filter of an air conditioner. .

This is to increase the purification efficiency when exhaust gas and condensed water are mixed by applying several diaphragms inside the drain filter. However, the flow of condensed water inside the drain filter is hindered by pressure on the exhaust side. If the pressure inside the drain filter increases due to various partition walls, condensate may not be properly discharged and may remain in the muffler. In addition, there is a possibility that the exhaust gas moves to the rail filter side without properly passing through the muffler and goes outside without attenuation of the engine noise.

The problem to be solved by the present invention may be to provide an exhaust device for a gas engine heat pump capable of effectively discharging water condensed from exhaust gas.

Another object of the present invention may be to provide an exhaust device for a gas engine heat pump capable of improving exhaust gas emission efficiency.

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

According to an aspect of the present invention for achieving the above object, the first tank the upper surface is closed, the lower surface is open; A second tank whose lower surface is closed and the upper surface is opened, located below the first tank, and coupled to the first tank; A pipe installed inside the first tank, extending from the first tank to the second tank, and having at least one hole formed therein; An inlet pipe communicating with the pipe from the outside of the first tank; A first outlet pipe communicating the inside and the outside of the first tank; A second outlet pipe communicating the inside and the outside of the second tank; And, it is installed in the second tank, it provides an exhaust system including a funnel (funnel) located below the pipe.

According to another aspect of the present invention, the funnel is: a tower having a cylindrical shape, extending from a lower surface of the second tank to one end of the pipe, and including at least one hole formed through an outer circumferential surface and an inner circumferential surface. ; In addition, it may include a loop extending from the outer circumferential surface of the tower toward the inner surface of the second tank.

According to another aspect of the present invention, the loop may have a wedge shape from the first tank to the second tank.

Further, according to another aspect of the present invention, a sidewall formed along the circumference of the loop and in contact with the inner circumferential surface of the first tank may be further included.

According to another aspect of the present invention, further comprising a plate positioned adjacent to the lower end of the tower and forming a section of the second tank, wherein the plate has an inclination with respect to the lower surface of the second tank. In addition, the second outlet pipe may be located on the upper side of the plate where the distance between the plate and the lower surface of the second tank is closest.

Further, according to another aspect of the present invention, a neutral fossil filled between the second tank and the funnel may be further included.

According to another aspect of the present invention, the upper end of the pipe is spaced apart from the upper surface of the first tank, and the lower end of the pipe may be supported or contacted to the upper side of the funnel.

According to the exhaust device for a gas engine heat pump of the present invention, one or more of the following effects are provided.

First, it is possible to provide an exhaust device for a gas engine heat pump capable of effectively discharging water condensed from the exhaust gas.

Second, it is possible to provide an exhaust device for a gas engine heat pump that can improve the exhaust gas emission efficiency.

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 schematic block diagram of a gas engine heat pump according to an embodiment of the present invention.

2 is a schematic diagram illustrating a structure for compressing a refrigerant in two stages according to an embodiment of the present invention.

3 to 6 are views showing examples of an exhaust device according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Hereinafter, a gas engine heat pump according to embodiments of the present invention will be described with reference to the drawings.

1 and 2, the gas engine heat pump drives the compressor 60 using the engine 30 to circulate the refrigerant of the heat pump II. That is, the gas engine heat pump includes a gas engine unit (I) for driving the engine 30 with gas fuel, a heat pump (II) for circulating a refrigerant by driving a compressor according to the operation of the driven engine 30, It includes a coolant circulation unit III through which coolant for cooling the engine 30 circulates.

The gas engine unit (I) is a mixer 14 that discharges a mixture of air and fuel, an engine 30 that operates by burning the mixer discharged from the mixer 14, and exhaust gas discharged from the engine 30. And a turbocharger 20 for compressing the mixer supplied to the engine 30 and an exhaust gas heat exchanger 50 for exchanging exhaust gas discharged from the engine 30 with cooling water.

The engine 30 is an internal combustion engine that operates through a process of burning compressed gas. The engine 30 may rotate the engine-side driving pulley 31 disposed on one side of the engine 30 through four strokes of suction, compression, explosion, and exhaust. The engine-side drive pulley 31 can rotate the compressor-side drive pulley 61 described below.

Engine 30 is a plurality of cylinders (36a, 36b, 36c, 36d) for reciprocating the piston inside by igniting the supplied fuel, and a connecting rod that converts the reciprocating motion of the piston (not shown) into rotational motion. It may include a (not shown) and a crankshaft (not shown) that is connected to the connecting rod and rotates.

The gas engine unit (I) distributes the throttle valve 38 that controls the amount of the mixer supplied to the engine 30 and the mixer supplied to the engine 30 through the throttle valve 38 to each of a plurality of cylinders. It may further include an intake manifold 32 and an exhaust manifold 34 in which exhaust gases discharged from the plurality of

cylinders

36a, 36b, 36c, and 36d are collected.

A plurality of distribution passages are formed in the intake manifold 32 so as to distribute the fuel supplied to the engine 30 to each of the plurality of cylinders. The exhaust manifold 34 is connected to each of the plurality of cylinders, and one exhaust A plurality of laminated flow paths may be formed that are laminated to the flow path.

The throttle valve 38 may adjust the amount of fuel supplied to the engine 30. The throttle valve 38 supplies compressed fuel to the combustion chamber of the engine 30.

The mixer 14 discharges the supplied fuel and air at a constant mixing ratio and supplies it to the engine. The mixer 14 is disposed upstream of the turbocharger 20, and supplies mixed fuel of a certain ratio to the turbocharger 20.

The gas engine unit (I) further includes an air cleaner 12 that filters air supplied to the mixer 14 to supply clean air, and a zero governor 10 that supplies fuel to the mixer 14 at a constant pressure. Can include.

The air cleaner 12 may block mixing of moisture and oil in the form of dust and mist by using a filter for external air supplied to the engine.

The zero-gar burner 10 always supplies fuel at a constant pressure regardless of the pressure of the fuel flowing into the zero-gar burner 10 or a change in flow rate. The zero-go burner 10 can obtain a stable outlet pressure over a wide range, and has a function of almost constantly adjusting the pressure of gaseous fuel supplied to the engine in the form of atmospheric pressure. In addition, the zero governor 10 may be provided with two solenoid valves to cut off the supplied fuel.

The turbocharger 20 can compress the mixer at high temperature and high pressure. The turbocharger 20 rotates the turbine with the force of the exhaust gas, compresses the mixer with the torque, and sends it to the engine 30.

The turbocharger 20 is a mixer in which the turbocharger turbine 22 is turned using exhaust gas discharged from the engine 30, and the turbocharger blades 24 connected to the turbocharger turbine 22 flow to the engine 30. Can be compressed. The turbocharger turbine 22 and the turbocharger blade 24 may be connected to one rotation shaft 26.

The exhaust gas heat exchanger 50 exchanges heat of exhaust gas discharged from the engine 30 with cooling water. In the exhaust gas heat exchanger 50, the exhaust gas discharged from the engine 30 and the cooling water flowing by the cooling water pump 52 may exchange heat with each other. The coolant that has passed through the exhaust gas heat exchanger 50 may flow into the engine again, thereby cooling the engine 30.

The heat pump II is a compressor 60 that compresses a refrigerant using the drive of the engine 30, an accumulator 62 that separates the gaseous refrigerant from the liquid refrigerant and sends the gaseous refrigerant to the compressor 60, and a compressor. An oil separator (64) that separates oil from the refrigerant discharged from 60, an outdoor heat exchanger (68) that heats the refrigerant with outdoor air or coolant, an indoor unit (80) that controls indoor air using a refrigerant, and indoors The refrigerant discharged from the expansion valve 72 and the compressor 60 is disposed between the unit 80 and the outdoor heat exchanger 68 to expand the flowing refrigerant to the outdoor heat exchanger 68 or the indoor unit 80. It further includes a flow path change valve 66 to be sent.

The compressor 60 may be driven by the engine 30. The compressor 60 may compress the refrigerant by rotating the engine-side drive pulley 31 and the compressor-side drive pulley 61 connected by the belt 31a.

Two compressors 60 may be disposed on both sides of the engine 30. Accordingly, the engine-side drive pulley 31 is connected to the compressor-side drive pulley 61 disposed on both sides, and can drive the two compressors 60. It is also possible for one compressor 60 to be arranged.

The accumulator 62 sends gaseous refrigerant among the refrigerants introduced through the flow path change valve 66 to the compressor 60. In the accumulator 62, as the liquid refrigerant and the gaseous refrigerant are separated and the gaseous refrigerant is discharged, it can act as a resistor in the refrigerant circulation.

The oil separator 64 may separate oil mixed with the refrigerant discharged from the compressor 60 and send it back to the compressor 60.

The outdoor heat exchanger 68 includes an outdoor fan 69 to exchange heat between outdoor air and a refrigerant. In addition, the outdoor heat exchanger 68 may exchange heat with the coolant that cools the engine 30 to achieve a phase change of the refrigerant. In the case of heat exchange with cooling water, a plate heat exchanger can be used.

The flow path change valve 66 may be sent to the outdoor heat exchanger 68 discharged from the compressor 60 or to the indoor unit 80 according to the operation mode of the heat pump.

The indoor unit 80 includes an indoor heat exchanger (not shown) and an indoor fan (not shown), and heat exchange between indoor air and a refrigerant flowing through the indoor heat exchanger to control the temperature of the indoor space.

The coolant circulation unit III may cool the engine 30 by circulating coolant through the coolant pump 52. The cooling water circulation unit III may be supplied to the engine 30 by passing the cooling water flowing by the cooling water pump 52 through the exhaust gas heat exchanger 50.

The gas engine heat pump uses a turbocharger 20 that compresses a mixer supplied to the engine 30 with exhaust gas discharged from the engine 30, and a compressor 60 using exhaust gas discharged from the turbocharger 20. It includes a turbine compressor (40) for compressing the refrigerant flowing into the.

The turbocharger 20 is connected to the engine 30 to rotate the turbocharger turbine 22 with high-pressure exhaust gas discharged from the engine 30, and a turbocharger connected to the turbocharger turbine 22 and the rotating shaft 26 By rotating the blade 24, it is possible to compress the mixer supplied to the engine 30.

The turbocharger 20 may include a turbocharger turbine chamber 23 in which the turbocharger turbine 22 is disposed, and a mixer compression chamber 25 in which the turbocharger blades 24 are disposed. In the turbocharger turbine chamber 23, an inlet 23a through which exhaust gas is introduced is formed in the radial direction of the turbocharger turbine 22, and an outlet 23b through which exhaust gas is discharged is in the direction of the rotation axis of the turbocharger turbine 22. It can be formed as

In the mixer compression chamber 25, an inlet 25a through which the mixer is introduced is formed in the direction of the rotational axis of the turbocharger blade 24, and an outlet 25b through which the mixer is discharged is formed in the radial direction of the turbocharger blade 24. I can.

The turbocharger turbine compartment 23 is disposed between the engine 30 and the turbine compressor 40, drives the turbocharger 20 with exhaust gas discharged from the engine 30, and exhausts the turbine compressor 40. Exhaust gas. The mixer compression chamber 25 is disposed between the mixer 14 and the engine 30 to compress the mixer mixed by the mixer 14 and supply it to the engine 30. In addition, the gas engine heat pump may cool a high-temperature mixer supplied to the engine 30 by disposing an intercooler (not shown) between the mixer compression chamber 25 and the engine 30 and supply it to the engine 30.

The turbine compressor 40 is disposed between the turbocharger 20 and the exhaust gas heat exchanger 50 in the flow direction of the exhaust gas. The turbine compressor 40 is disposed between the accumulator 62 and the compressor 60 in the flow direction of the refrigerant. The turbine compressor 40 can thus increase the speed of the refrigerant flowing into the compressor 60 or the amount of the refrigerant.

The turbine compressor 40 includes a driving unit 42 that rotates by exhaust gas discharged from the turbocharger 20, and a refrigerant compression unit that is connected to the driving unit 42 and rotates, and compresses the refrigerant flowing into the compressor 60. It includes (46).

The driving unit 42 includes a turbine 44 driven by exhaust gas and a turbine chamber 45 in which the turbine 44 is disposed, and the turbine chamber 45 includes an inlet 45a through which exhaust gas is introduced. The discharge port 45b formed in the radial direction of 44) and through which exhaust gas is discharged may be formed in the direction of the rotation axis of the turbine 44.

The refrigerant compression unit 46 includes a blade 48 connected to the turbine 44 and rotating, and a refrigerant compression chamber 49 in which the blade 48 is disposed, and the refrigerant is introduced into the refrigerant compression chamber 49. The inlet 49a may be formed in the direction of the rotational axis of the blade 48, and the discharge port 49b through which the refrigerant is discharged may be formed in the radial direction of the blade 48.

The turbine 44 and the blade 48 may be connected through a rotating shaft 43. Accordingly, the rotation shaft 43 may transmit the rotational force of the turbine 44 to the blade 48.

Referring to FIG. 3, exhaust gas that has passed through the exhaust gas heat exchanger 50 (see FIG. 1) may be introduced into the exhaust device 100.

The exhaust device 100 may include a first tank 110 and a second tank 120. The first tank 110 may have an upper surface closed and a lower surface open, and the second tank 120 may have an upper surface open and a lower surface closed. The first tank 110 may be located above the exhaust device 100, and the second tank 120 may be located below the exhaust device 100. The second tank 120 may be combined with the first tank 110. For example, the first tank 110 and the second tank 120 may have a cylinder shape as a whole, and the first tank 110 and the second tank 120 are coupled to each other, so that the exhaust device 100 is also a cylinder as a whole. It can be a shape.

The inlet pipe 113 may be in communication with the first tank 110. The first outlet pipe 111 may be in communication with the first tank 110, and the second outlet pipe 112 may be in communication with the second tank 120. For example, the first outlet pipe 111 may be positioned above the first tank 110, and the second outlet pipe 112 may be positioned below the second tank 120. The outlet pipe 111 may be for discharging gas, and the second outlet pipe 112 may be for discharging water (hereinafter, condensed water) condensed from exhaust gas.

3 and 4, the pipe 114 may be installed inside the first tank 110. The pipe 114 may have an elongated cylindrical shape and may have holes 114h. The holes 114h may be formed on the outer surface of the pipe 114. The holes 114h may be for noise reduction. The pipe 114 may extend in the longitudinal direction of the first tank 110 and may have the same longitudinal axis. One end 1141 of the pipe 114 may be spaced apart from the top surface of the first tank 110 by a certain distance (G1), and the other end 1142 of the pipe 114 will protrude to the outside of the first tank 110. I can. The other end 1142 of the pipe 114 may be positioned adjacent to the upper end of the roof 1212 and/or the tower 1214 of the funnel 121 to be described later, or may be supported or contacted with the upper end.

The inlet pipe 113 may pass through the first tank 110 and communicate with the pipe 114. One end of the inlet pipe 113 may be located outside the first tank 110, and the other end of the inlet pipe 113 may be connected to the outer circumferential surface of the pipe 114 inside the first tank 110. The first outlet pipe 111 may communicate with the upper surface of the tank 110.

5 and 6, the funnel 121 may be located or mounted inside the second tank 120. The funnel 121 may have

roofs

1211 and 1212 and a tower 1214. The roof 1211.1212 can form the top of the funnel 121 and the tower 1214 can form the bottom of the funnel 121.

The

roofs

1211 and 1212 may include a sidewall 1211 and an inclined portion 1212. The sidewall 1211 may have a cylindrical shape as a whole and may face or contact the inner surface of the second tank 120. The inclined portion 1212 may extend from the sidewall 1211 to form an inclination in the direction of the central axis of the second tank 120. The tower 1214 may have a cylindrical shape and may be connected to the inclined portion 1212. The center of the inclined portion 1212 may be opened in a circular shape, and may be connected to the tower 1214. The tower 1214 may include holes 1215 penetrating the inner and outer surfaces.

The plate 130 may be installed under the second tank 120. The plate 130 may have a disk shape as a whole, and the circumference of the plate 130 may contact the inner surface of the second tank 120. The plate 130 may have an inclined surface 131 that is inclined while forming a constant inclination with the lower surface of the second tank 120. The plate 130 may have an opening 132 formed in the center, and the tower 114 may be inserted into the opening 132 of the plate 131.

A neutralizing agent or neutral fossil (not shown) may be filled in the space S formed on the top of the plate 130 and outside the funnel 121 in the second tank 120.

3 to 6, the exhaust gas introduced into the tank 110 through the inlet pipe 113 may flow into the pipe 114. The exhaust gas introduced into the pipe 114 may flow to the outside of the pipe 114 through the holes 114h. The holes 114h may reduce noise that may be generated by a pressure change of the exhaust gas. At this time, water condensed on the inner wall of the first tank 110 from the exhaust gas may be collected through the

loops

1211 and 1212 of the funnel 121 and flow into the tower 1214.

The exhaust gas introduced into the pipe 114 may flow not only to the first tank 110 but also to the second tank 120. The exhaust gas can rotate in the funnel 121. That is, the exhaust gas may form a tornado by the funnel 121 installed inside the second tank 120. The tornado of exhaust gas formed by the funnel 121 transfers water flowing or moving into the tower 1214 of the funnel 121 through the holes 1215 of the tower 1214 and the tower 1214 and the second tank 120. ) It can be discharged to the space (S) formed between. As the condensed water W is collected in the neutralizing agent or neutral fossil (not shown) filling the space S, the exhaust device 100 may effectively purify the condensed water W.

The exhaust gas flowing in the first tank 110 and/or the second tank 120 may provide heat to the condensed water W filled in the space S. Accordingly, it is possible to prevent the condensed water (W) from freezing and lowering the exhaust efficiency of the exhaust device (100).

Water collected by the inclined surface 131 of the plate 130 may be discharged to the outside of the exhaust device through the second discharge pipe 112. The exhaust gas that has formed a tornado may flow back to the first tank 10 and be discharged to the outside of the exhaust device 100 through the first outlet pipe 111.

Accordingly, it is possible to improve the separation efficiency of the exhaust gas and the condensed water.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Various modifications may be possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

Claims

A first tank with an upper surface closed and an open lower surface;

A second tank whose lower surface is closed and the upper surface is opened, located below the first tank, and coupled to the first tank;

A pipe installed inside the first tank, extending from the first tank to the second tank, and having at least one hole formed therein;

An inlet pipe communicating with the pipe from the outside of the first tank;

A first outlet pipe communicating the inside and the outside of the first tank;

A second outlet pipe communicating the inside and the outside of the second tank; And,

An exhaust device installed in the second tank and including a funnel positioned under the pipe.
The method of claim 1,

The funnel is:

A tower having a cylindrical shape, extending from a lower surface of the second tank to one end of the pipe, and including at least one hole formed through an outer circumferential surface and an inner circumferential surface; And,

Exhaust device comprising a loop extending from the outer peripheral surface of the tower toward the inner surface of the second tank.
The method of claim 2,

The roof is an exhaust device having a wedge shape in a direction from the first tank to the second tank.
The method of claim 2,

The exhaust device further comprises a sidewall formed along the circumference of the roof and in contact with the inner circumferential surface of the first tank.
The method of claim 1,

Located adjacent to the lower end of the tower, further comprising a plate forming a section of the second tank,

The plate has an inclination with respect to the lower surface of the second tank,

The second outlet pipe is an exhaust system located above the plate in which the distance between the plate and the lower surface of the second tank is closest.
The method of claim 1,

Exhaust device further comprising neutral fossils filled between the second tank and the funnel.
The method of claim 1,

The upper end of the pipe is spaced apart from the upper surface of the first tank,

The lower end of the pipe is an exhaust device that is supported or in contact with the upper side of the funnel.