WO2024043768A2 - Variable intercooler having improved heat exchange efficiency, engine for power generator equipped with same, and biogas power generator - Google Patents

Abstract

The present invention relates to an intercooler which cools supply air that is to be provided to an engine and then provides same, an engine for a power generator equipped with same, and a biogas power generator. The variable intercooler having improved heat exchange efficiency, according to an embodiment of the present invention, comprises: a heat exchanger that carries out heat exchange between external air and supply air that is to be provided to an engine main body; and a cooling fan that provides external air so that the supply air passing through the heat exchanger and external air can undergo heat exchange, wherein the heat exchanger comprises a main heat exchange part through which the supply air passes and undergoes heat exchange with external air, and an expanding heat exchange part which, according to the efficiency of the heat exchanger, is inserted into or protrudes from the main heat exchange part so as to expand or reduce the size of the heat exchanger. Thus, the heat exchange efficiency is increased and the output of the engine can be increased.

Description

Variable intercooler with improved heat exchange efficiency, generator engine equipped with it, and biogas generator

The present invention relates to an intercooler that cools and supplies air supplied to an engine, a generator engine equipped with the same, and a biogas generator.

In general, a generator is a device that converts kinetic energy into electrical energy, and is classified into wind generators, hydroelectric generators, engine generators, etc. depending on the means of providing kinetic energy.

Among generators, engine generators that forcibly provide power are often used as emergency generators or in places where it is difficult to obtain natural power. Engine generators generate power by driving a power generation device by an engine that burns fuel.

However, since engine generators consume fuel, environmental pollution occurs due to harmful substances contained in exhaust gas. Recently, technologies have been developed to minimize environmental pollution caused by exhaust gas.

To solve this problem, a biogas generator using biogas has been introduced.

Biogas generators mix biogas with the supply air supplied to the engine, thereby increasing the combustion temperature by improving the explosiveness of the fuel, thereby minimizing environmental pollution by exhausting the exhaust gas with minimal harmful substances. I was able to.

Furthermore, an intercooler was installed to supercharge the engine's air supply to improve engine efficiency and power generation by supercharging the engine. It has been disclosed in “Biogas Generator”.

As for the conventional biogas generator described above, various embodiments related to the biogas generator including an intercooler capable of improving the fixing force to the external fixed frame have been described. According to one embodiment, the intercooler is an intercooler housing. ; A plurality of devices are disposed inside the intercooler housing, allow and move the high-temperature mixed gas therein, and heat exchange the high-temperature mixed gas using refrigerant that flows into and fills the interior of the intercooler housing when moved. heat exchange pipes; and a plurality of fixing structures disposed around the outer periphery of the intercooler housing and extending or shortening the length of the intercooler housing by sliding them in or out to be fixed to an external fixing frame. did.

The intercooler disclosed in this conventional biogas generator was able to prevent the intercooler housing from being easily separated from the external fixed frame due to the flow generated during operation of the generator.

However, the conventional intercooler can only prevent damage, but the size of the heat exchanger is limited, making it difficult to control the supply air temperature required by the engine, and it is difficult to control NOx emissions according to the supply air temperature. .

[Prior art literature]

[Patent Document]

(Patent Document 1) KR 10-2526437 B1

(Patent Document 2) KR 10-2526437 B1

(Patent Document 3) KR 10-2511015 B1

(Patent Document 4) KR 10-2532045 B1

(Patent Document 5) US 2021/0148660 A1

(Patent Document 6) US 11,085,364 B2

(Patent Document 7) US 11,137,218 B2

[Non-patent literature]

(Non-patent document 1) Oh Gwang-heon and two others, data from the 2019 Korean Society of Automotive Engineers Spring Conference, page. 219-223, Experimental study on factors affecting air-cooled intercooler performance

(Non-patent document 2) Oh Kwang-heon and 3 others, 2022 Korean Society of Automotive Engineers Spring Conference materials, page. 213-217, Experimental study on charge air pressure difference in intercooler tank

(Non-patent Document 3) Seonggeun Kim and 6 others, 2020 Korean Society of Automotive Engineers Fall Conference and Exhibition Materials, page. 61-62, prediction of the amount of condensate generated inside the intercooler in low temperature environments

The present invention was created to solve the above-mentioned problems, and the problem to be solved by the present invention is to adjust the supply air temperature by sliding the expansion heat exchanger in the main heat exchanger to expand or reduce the size of the heat exchanger, thereby increasing the heat exchange efficiency. The purpose is to provide a variable intercooler with improved heat exchange efficiency, a generator engine equipped with the same, and a biogas generator.

In addition, the present invention forms a variable support part that is elastically deformed on the expansion heat exchanger plate to widen the gap between the expansion heat exchanger plates when the expansion heat exchanger protrudes from the main heat exchanger, and when the expansion heat exchanger is inserted into the main heat exchanger, the expansion heat exchanger plate The purpose is to provide a variable intercooler with improved heat exchange efficiency that can prevent the inflow of foreign substances by narrowing the gap between the intercoolers, a generator engine equipped with the same, and a biogas generator.

In addition, the present invention is a variable intercooler with improved heat exchange efficiency that can improve heat exchange efficiency by installing an outside air guide cover on the heat exchanger to circulate outside air provided from the cooling fan to the main heat exchanger and the expansion heat exchanger, and a variable intercooler equipped with the same. The purpose is to provide a generator engine and a biogas generator.

In addition, the present invention is a variable intercooler that improves heat exchange efficiency by constructing an outside air intake at the location of the expansion heat exchanger to quickly discharge the outside air that is changed and discharged by the outside air guide cover. The purpose is to provide a generator engine and a biogas generator equipped with the same.

The variable intercooler, which improves heat exchange efficiency according to an embodiment of the present invention to achieve the above problem, includes a heat exchanger for heat exchange between the supply air and external air supplied to the engine body, and external air for heat exchange between the supply air and external air passing through the heat exchanger. A variable intercooler including a cooling fan, wherein the heat exchanger is a main heat exchanger that exchanges heat with outside air while passing through the supply air, and is inserted or protruded from the main heat exchanger depending on the efficiency of the heat exchanger and the size of the heat exchanger. It includes an expansion heat exchange unit that expands or reduces.

The main heat exchange part includes a plurality of main heat dissipation tubes through which the supply air passes, and the expansion heat exchange part is connected to the main heat dissipation tube through which the supply air passes, and slides on the main heat dissipation tube as it expands or contracts in the main heat exchange part. It may include an expansion heat dissipation tube that moves and appears.

The expansion heat exchanger includes a plurality of expansion heat dissipation plates arranged in parallel that radiate heat as the outside air passes, and the space between the plurality of expansion heat dissipation plates is narrowed when the size of the heat exchanger is changed, or It may include a variable support portion that protrudes from the expansion heat dissipation plate in a direction facing each other to widen the gap between the plurality of expansion heat dissipation plates and elastically deforms and supports the plurality of expansion heat dissipation plates.

In order to vary the size of the heat exchanger, it may include a variable driving mechanism that drives the expansion heat exchanger to appear and retract from the main heat exchanger.

When the heat exchanger is expanded, the cooling fan is installed in a position opposite to the position of the cooling fan with respect to the heat exchanger so that the outside air passing through the main heat exchanger is discharged while passing through the expansion heat exchanger. It may include an external guide cover that guides its movement.

The outside air guide cover opens the heat exchanger when the heat exchanger is reduced, and covers an end of the heat exchanger only when the heat exchanger is expanded. A cover hinge rotatably couples the outside air guide cover to guide the movement of the outside air. May include wealth.

The external air guide cover may include a cover driving part that rotates the external air guide cover around the cover hinge unit as the heat exchanger expands or contracts.

The generator engine equipped with a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention further includes the intercooler of the above-described embodiment and an engine body that mixes and combusts biogas.

A biogas generator equipped with a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention further includes a generator engine equipped with a variable intercooler according to the above embodiment, and a power generation device driven by the generator engine. do.

According to the present invention, the size of the heat exchanger is expanded or reduced by sliding the expansion heat exchanger in the main heat exchanger, and the size of the heat exchanger is expanded or reduced depending on the supply air temperature to increase or reduce the movement path of the supply air, thereby increasing or reducing the size of the heat exchanger. Heat exchange efficiency can be improved.

In addition, the present invention forms a protruding variable support on the expansion heat dissipation plate, so that when the expansion heat exchanger is inserted into the main heat exchanger, the gap between the expansion heat dissipation plates is narrowed to prevent foreign substances from penetrating between the expansion heat dissipation plates. , When the expansion heat exchanger is inserted into the main heat exchanger, the heat exchange efficiency can be improved by widening the gap between the expansion heat dissipation plates to allow outside air to pass through and exchange heat.

In addition, the present invention can improve heat exchange efficiency by installing an outdoor air guide cover at the rear of the heat exchanger to provide outdoor air supplied from the cooling fan to the expansion heat exchange unit.

In addition, the present invention installs the outdoor air guide cover to be rotatable to seal or open the rear of the heat exchanger as the size of the heat exchanger is expanded or reduced, so that when the heat exchanger is reduced, the outdoor air is quickly discharged and the heat exchanger is expanded. In this condition, heat exchange efficiency can be improved by circulating outside air.

In addition, in the present invention, an outdoor air suction unit for sucking in external air is installed at the location of the expansion heat exchange unit, thereby guiding the movement of external air to the expansion heat exchange unit, thereby improving heat exchange efficiency by quickly circulating external air.

Figure 1 is a perspective view showing a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention, with the heat exchanger in an expanded state.

Figure 2 is an exploded perspective view showing a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention.

Figure 3 is a perspective view showing a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention, with the heat exchanger in a reduced state.

Figure 4 is a side cross-sectional view showing a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention, with the heat exchanger in an expanded state.

Figure 5 is a side cross-sectional view showing a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention, with the heat exchanger in a reduced state.

Figure 6 is a perspective view of a heat exchanger constituting a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention, in an expanded state.

Figure 7 is a perspective view of a heat exchanger constituting a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention, in a reduced state.

Figure 8 is a partial cross-sectional view of a heat exchanger constituting a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention.

Figure 9 is a plan cross-sectional view showing a variable intercooler with improved heat exchange efficiency according to an embodiment of the present invention, with the heat exchanger in an expanded state.

Figure 10 is a plan cross-sectional view showing a variable intercooler with improved heat exchanger efficiency according to an embodiment of the present invention, with the heat exchanger in a reduced state.

Figure 11 is a side cross-sectional view showing a variable intercooler with improved heat exchanger efficiency according to an embodiment of the present invention, and shows the operating state of the external air guide cover with the heat exchanger expanded.

Figure 12 is a side cross-sectional view showing a variable intercooler with improved heat exchanger efficiency according to an embodiment of the present invention, and shows the operating state of the external air guide cover with the heat exchanger in a reduced state.

Figure 13 is a schematic configuration diagram showing a generator engine equipped with a variable intercooler with improved heat exchanger efficiency according to an embodiment of the present invention.

Figure 14 is a schematic configuration diagram showing a biogas generator equipped with a variable intercooler that improves heat exchanger efficiency according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

1 to 10, the variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention may include a heat exchanger 110.

The heat exchanger 110 can exchange heat with outside air to cool the supply air supplied to the engine body 250, which is driven by burning fuel.

The heat exchanger 110 can cool the supplied air in a way that the supplied air passes through it and the outside air passes around it, thereby exchanging heat with each other.

The heat exchanger 110 may expand or contract in size depending on the temperature of the outside air or the temperature of the supply air.

The heat exchanger 110 may include a main heat exchanger 111 and an expansion heat exchanger 115. As the expansion heat exchanger 115 appears in the main heat exchanger 111, the size of the heat exchanger 110 is increased. It can be expanded or collapsed.

Here, in a normal state, the heat exchanger 110 exchanges heat in a state where the expansion heat exchanger 115 is inserted into the main heat exchanger 111 and the size is reduced, and when the temperature of the outside air is high or the temperature of the supply air is increased, the heat exchanger 110 exchanges heat. When the supply is low, the expansion heat exchanger 115 protrudes from the main heat exchanger 111, thereby expanding the size of the heat exchanger 110.

The main heat exchange unit 111 may include a main heat dissipation tube 112 and a main heat dissipation plate 113.

The main heat dissipation tube 112 may be formed of a metal with high heat exchangeability in the form of a hollow pipe, and a plurality of main heat dissipation tubes 112 may be arranged at regular intervals.

Fixing plates 114 are installed on both sides of the main heat dissipation tube 112 to fix the main heat dissipation tubes 112 in an arranged state. The fixing plates 114 located on both sides of the main heat dissipation tube 112 are A plurality of main heat dissipation plates 113 may be installed in parallel with the fixing plate 114 between them.

A plurality of main heat dissipation plates 113 are arranged side by side, and a plurality of main heat dissipation tubes 112 pass through them to perform the function of supporting the main heat dissipation tube 112 and at the same time are in contact with the main heat dissipation tube 112. It can perform the function of dissipating heat by diffusing the heat of the main heat dissipation tube 112.

The expansion heat exchanger 115 can slide on one side of the main heat exchanger 111 to expand or reduce the size of the heat exchanger 110.

The expansion heat exchange unit 115 may include an expansion heat dissipation tube 116 and an expansion heat dissipation plate 117.

The expansion heat dissipation tube 116 may be formed in the form of a pipe through which the air supply for supplying to the engine body 250 passes. A plurality of expansion heat dissipation tubes 116 are arranged at regular intervals, and each expansion heat dissipation tube 116 The expansion heat dissipation tube 116 may be installed in the main heat dissipation tube 112 to be slidably movable in the longitudinal direction of one side of the main heat dissipation tube 112 by being inserted into the main heat dissipation tube 112 at a position corresponding to the .

At this time, a fixing plate 114 is installed at the outer end of the plurality of expansion heat dissipation tubes 116 to fix the expansion heat dissipation tubes 116 in an arranged state.

The expansion heat dissipation plate 117 is installed on the expansion heat dissipation tube 116 and can dissipate heat by diffusing the heat of the expansion heat dissipation tube 116. A plurality of expansion heat dissipation plates 117 are arranged side by side and can be divided into a plurality of expansions. The heat dissipation tube 116 may be installed to penetrate the plurality of expansion heat dissipation plates 117 in orthogonal directions.

The plurality of expansion heat dissipation plates 117 slide in the expansion heat dissipation tube 116 along the longitudinal direction of the expansion heat dissipation tube 116, so that the distance between the plurality of expansion heat dissipation plates 117 is narrowed or the distance between them is widened. It can be.

In order to maintain a distance between each expansion heat dissipation plate 117, a variable support portion 118 may be formed to protrude and support the expansion heat dissipation plates 117 by elastic force.

The variable support portion 118 may be formed by cutting a portion of the expansion heat dissipation plate 117 and then forcibly bending and protruding it in the direction in which the adjacent expansion heat dissipation plate 117 is located.

When the expansion heat exchange part 115 moves so that the variable support part 118 is inserted into the main heat exchange part 111, the variable support part 118, which was curved and protruded, unfolds and elastic force accumulates, thereby reducing the gap between the expansion heat dissipation plates 117. When it is reduced and moved so that the expansion heat exchange part 115 protrudes from the main heat exchange part 111, the expanded variable support part 118 bends and protrudes again, pushing the expansion heat dissipation plates 117 against each other by elastic force. It is possible to adjust the gap between the expansion heat dissipation plates (117).

For example, if the expansion heat exchanger 115 is inserted from the main heat exchanger 111 in the form of the expansion heat dissipation tube 116 being inserted into the main heat dissipation tube 112, and the size of the heat exchanger 110 is reduced. , the expansion heat dissipation plate 117 is pressed by the fixing plate 114 of the expansion heat exchanger 115, and the variable support portion 118 is expanded to minimize the gap between them.

On the other hand, when the expansion heat exchanger 115 protrudes from the main heat exchanger 111 in the form of the expansion heat dissipation tube 116 protruding from the main heat dissipation tube 112 and the size of the heat exchanger 110 is expanded, the expansion heat dissipation plate As the expanded variable support portion 118 of (117) protrudes and deforms to be bent again, the gap between them may widen.

A plurality of variable supports 118 formed on each of the plurality of expansion heat dissipation plates 117 may be formed on both sides or the upper and lower sides of each expansion heat dissipation plate 117, and the variable supports between the expansion heat dissipation plates 117 adjacent to each other may be formed. (118) may be formed alternately and repeatedly at positions offset from each other so as not to overlap each other.

As shown in Figures 1 to 5, the variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention may include an end cover 120 and a finishing cover 130.

The end cover 120 is installed on both sides of the heat exchanger 110 to supply air supply to the main heat dissipation tube 112 or the expansion heat dissipation tube 116, or to the main heat dissipation tube 112 or the expansion heat dissipation tube 116. The supply air that has passed through can be collected and provided to the engine.

The end cover 120 located on one side of the heat exchanger 110 is formed with an air supply port 121 through which air is introduced into the heat exchanger 110, and the end cover 120 is located on the other side of the heat exchanger 110. ), a supply air outlet 123 through which the cooled supply air is discharged through the heat exchanger 110 may be formed.

In the embodiment, the end cover 120 is installed on the outside of the main heat exchange part 111 and the outside of the expansion heat exchange part 115 located in the opposite direction to one side of the main heat exchange part 111, and the end cover 120 ) may be formed in the form of a cap that covers the outside of the fixing plate 114.

The finishing cover 130 may seal a portion of the circumference of the heat exchanger 110 to prevent outside air provided from the cooling fan 140 from escaping the circumference of the heat exchanger 110.

In the embodiment, both circumferences of the heat exchanger 110 are opened and a finishing cover 130 is installed on the upper side of the heat exchanger 110 to close the upper and lower sides of the heat exchanger 110. However, the finishing cover 130 is The heat exchanger 110 may be configured to have both sides sealed and the upper and lower sides open.

Meanwhile, the finishing cover 130 is slidably coupled with the first cover 131 and the second cover 133 overlapping, so that the expansion heat exchanger 115 appears from the main heat exchanger 111 and the heat exchanger ( Even if the size of 110) is expanded or reduced, the first finishing plane and the second cover 133 slide and expand or reduce in size, so that the outside air passing through the heat exchanger 110 can pass without leaking to the outside. 110) can be closed.

In addition, a guide groove is formed on one of the first cover 131 and the second cover 133 along the sliding direction so that the first cover 131 and the second cover 133 can slide while coupled to each other, and the other is inserted into the guide groove to provide a guide. A guide protrusion that moves along the groove may be formed.

Here, the side end of the first cover 131 is coupled to the main heat exchanger 111, and the side end of the second cover 133 is coupled to the expansion heat exchanger 115 to form the expansion heat exchanger in the main heat exchanger 111 ( When 115) slides, it slides in a state where the first cover 131 and the second cover 133 overlap, and the outflow of external air to the upper and lower parts of the heat exchanger 110 can be blocked.

As shown in FIGS. 1, 2, 11, and 12, the variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention may include an external air guide cover 150.

This outdoor air guide cover 150 expands the size of the heat exchanger 110 and allows the outdoor air of the cooling fan 140 located in the main heat exchange part 111 of the heat exchanger 110 to flow into the main heat exchange part 111. It is possible to guide the movement of outdoor air discharged from the main heat exchange unit 111 so that it is discharged through the expansion heat exchange unit 115.

The external air guide cover may be located in the opposite direction to the direction in which the cooling fan 140 is located, centered on the heat exchanger 110, and the external air guide cover 150 expands and heat exchanges the external air passing through the main heat exchange unit 111. It is possible to guide the movement of external air so that it moves to the unit 115 and is discharged again in the direction where the cooling fan 140 is located through the expansion heat exchange unit 115.

The outdoor air guide cover 150 is rotatably installed and seals the direction opposite to the direction in which the cooling fan 140 is located centered on the heat exchanger 110, thereby guiding outdoor air in the direction where the expansion heat exchange unit 115 is located. , the direction opposite to the direction in which the cooling fan 140 is located centered on the heat exchanger 110 may be opened to allow outdoor air passing through the main heat exchange unit 111 to be discharged directly without being guided to the expansion heat exchange unit 115. .

The outer ends of both sides of the outdoor air guide cover 150 may have the shape of an arc so that the outdoor air passing through the main heat exchange unit 111 changes direction in a “U” shape and is supplied to the expansion heat exchange unit 115.

The external air guide cover 150 rotates up and down only when the size of the heat exchanger 110 is expanded to the rear of the heat exchanger 110 (with respect to the direction in which the cooling fan 140 is located centered on the heat exchanger 110). It can be installed in the heat exchanger 110 by the cover hinge part 151 to cover or open the heat exchanger 110 (opposite direction).

For example, the lower edge of the external air guide cover 150 is rotatably coupled to the bottom of the heat exchanger 110 by the cover hinge part 151, and the expansion heat exchange part 115 is inserted into the main heat exchange part 111. In this state, the heat exchanger 110 rotates downward around the cover hinge 151 to open the rear, and the expansion heat exchanger 115 protrudes from the main heat exchanger 111, thereby increasing the size of the heat exchanger 110. In the expanded state, it can rotate upward around the cover hinge portion 151 to close the rear of the heat exchanger 110.

Meanwhile, the external guide cover can rotate to open and close the rear of the heat exchanger 110 as the size of the heat exchanger 110 is expanded or reduced by the cover drive unit.

For example, the cover drive unit slides and protrudes from the main heat exchange unit 111 to the position corresponding to the fixing plate 114 of the expansion heat exchange unit 115 on the external guide cover 150. It is configured to form an inclined protrusion 153 having an inclined portion that gradually becomes lower as the water flows, and to form a guide protrusion 114a that guides the inclined protrusion 153 on the fixing plate 114 of the expansion heat exchanger 115. You can.

The inclined protrusion 153 is not supported on the guide protrusion 114a of the expansion heat exchange unit 115 when the heat exchanger 110 is expanded (the expansion heat exchange unit 115 protrudes from the main heat exchange unit 111). The external air guide cover 150 is positioned to seal the rear of the heat exchanger 110, and the heat exchanger 110 is reduced (the expansion heat exchange part 115 is inserted into the main heat exchange part 111). In this case, the inclined protrusion 153 is guided by the guide protrusion 114a of the expansion heat exchange unit 115, and the guide protrusion 114a presses the inclined surface of the gradually increasing inclined protrusion 153, thereby forming the external air guide cover 150. ) can forcibly rotate to open the rear of the heat exchanger 110.

At this time, the external air guide cover 150 is rotated and positioned so that the rear of the heat exchanger 110 is sealed in a state in which the inclined protrusion 153 is not pressed by the guide protrusion 114a of the expansion heat exchange unit 115. A cover spring may be installed to support the outdoor air guide cover 150 in a direction to seal it to the rear of the heat exchanger 110 by elastic force.

In another example, the cover driving part is implemented with an electric motor, and as the heat exchanger 110 expands or contracts, the external guide cover 150 moves around the cover hinge part 151 in the heat exchanger 110. The rear can be rotated to open and close selectively.

As shown in FIGS. 1 to 5, the variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention may include a variable drive mechanism 160.

This variable drive mechanism 160 can drive the expansion heat exchange unit 115 to slide and appear in the main heat exchange unit 111.

The variable drive mechanism 160 may be implemented as a cylinder that operates by pneumatics, and one end of the variable drive mechanism 160 is connected to the end cover 120 of the main heat exchanger 111, and the variable drive mechanism 160 The other end of the expansion heat exchange unit 115 is connected to the end cover 120 of the expansion heat exchange unit 115, and the expansion heat exchange unit 115 slides and moves in the main heat exchange unit 111 by the rising and rising cylinder shaft, and the size of the heat exchanger 110 is adjusted. It can be expanded or collapsed.

As shown in FIGS. 1 to 3, 9, and 10, the variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention may include a cooling fan 140.

This cooling fan 140 can forcibly blow outside air toward the heat exchanger 110.

The cooling fan 140 may be located on the side in the direction in which the main heat exchange unit 111 is located, and the cooling fan 140 rotates the cooling fan 140 by a drive motor to force external air into the main heat exchange unit ( Outdoor air for heat exchange with the heat exchanger 110 can be provided in the form of blowing in the direction where 111) is located.

The variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention may include an outside air intake portion 145.

This outside air intake unit 145 is located on the side of the cooling fan 140 and sucks outside air while the heat exchanger 110 is expanded, and the outside air passing through the main heat exchange unit 111 is connected to the outside air guide cover 150. External air can be sucked in at the location of the expansion heat exchange unit 115 to be exhausted through the expansion heat exchange unit 115.

The outside air intake unit 145 is connected to the mixer 210, which mixes and supplies supply air with biogas, and can suck the supply air from the mixer 210 by the suction force of the outside air from the outside air intake unit 145. The outside air suction unit 145 and the mixer 210 (210) can be connected through the outside air suction line 145 in a state in which a plurality of pipes are spaced apart and arranged side by side in the height direction so as to be connected.

At this time, a suction valve that opens and closes the outside air intake line 146 is installed in the outside air intake line 146, and the expansion heat exchange part 115 protrudes from the main heat exchange part 111, thereby expanding the size of the heat exchanger 110. Only in the form where the suction valve opens the outside air suction line 146 can the outside air be sucked in through the outside air intake unit 145.

On the other hand, when the main heat exchanger 111 is inserted into the expansion heat exchanger 115 and the size of the heat exchanger 110 is reduced, the suction valve closes the outside air suction line 146 to open the outside air suction section 145. It can block the intake of external air.

Let us explain the actions and effects between each component described above.

The variable intercooler 100, which improves heat exchange efficiency according to an embodiment of the present invention, is configured to expand or reduce the size of the heat exchanger 110 by sliding the expansion heat exchange part 115 in the main heat exchange part 111.

The main heat exchange unit 111 is installed in a state where a plurality of main heat dissipation plates 113 are spaced apart from each other and arranged side by side, and a plurality of main heat dissipation tubes 112 penetrate the plurality of main heat dissipation plates 113, Both ends of the plurality of main heat dissipation tubes 112 are fixed and installed by fixing plates 114.

Meanwhile, an expansion heat exchange part 115 is located on one side of the main heat exchange part 111, and the expansion heat exchange part 115 is positioned on a plurality of main heat dissipation tubes 112 to slide to one side of each main heat dissipation tube 112. An expansion heat dissipation tube 116 is installed.

A plurality of expansion heat dissipation plates 117 are installed at right angles to the plurality of expansion heat dissipation tubes 116, and the plurality of expansion heat dissipation plates 117 are connected to the expansion heat dissipation tubes 116 in the plurality of expansion heat dissipation tubes 116. It is installed to be able to slide along the longitudinal direction.

In addition, a fixing plate 114 is installed at the outer end of the plurality of expansion heat dissipation tubes 116 to support the plurality of expansion heat dissipation tubes 116, and a fixing plate 114 is installed at the end of the expansion heat dissipation tube 116. And on the fixing plate 114 installed at the end of the main heat dissipation tube 112, an end cover 120 is installed, each having an air supply port 121 through which supply air is supplied and a supply air outlet 123 through which heat-exchanged supply air is discharged. do.

Meanwhile, the main heat exchange unit 111 and the expansion heat exchange unit 115 are configured so that the expansion heat exchange unit 115 slides and appears in the main heat exchange unit 111 by the variable drive mechanism 160.

The expansion heat exchange unit 115 is coupled to the main heat dissipation tube 112 so that the expansion heat dissipation tube 116 can be slidably moved. A plurality of heat dissipation plates are spaced apart from each other on the expansion heat dissipation tube 116, and each heat dissipation plate has an adjacent heat dissipation plate. Variable supports 118 for supporting the plate are formed and overlapped to support each other by the variable supports 118.

In addition, a cooling fan 140 is installed on the side where the main heat exchanger 111 is located, and provides external air for heat exchange with the heat exchanger 110, and the direction in which the cooling fan 140 is located in the heat exchanger 110 is In the opposite direction, an external air guide cover 150 is installed to guide the moving direction of external air and provide internal air passing through the main heat exchange unit 111 to the expansion heat exchange unit 115.

When the size of the heat exchanger 110 is expanded while the rear of the heat exchanger 110 (opposite direction of the direction in which the cooling fan 140 is located) is opened, the external air guide cover 150 is installed at the rear of the heat exchanger 110. It is rotatably coupled to the heat exchanger 110 by a cover driving member to seal it.

And, in the heat exchanger 110, at the upper and lower portions of the heat exchanger 110 where the outside air guide cover 150, cooling fan 140, and end cover 120 are not installed, outside air passing through the heat exchanger 110 is A finishing cover 130 is installed to block leakage to the outside.

The finishing cover 130 has the first cover 131 and the second cover 133 overlapping each other so that it can be finished even if the size of the heat exchanger 110 is expanded or reduced, and the first cover 131 is the main heat exchanger. It is attached to (111), and the second cover 133 is attached to the expansion heat exchanger 115 to prevent outside air from leaking into the upper and lower parts of the heat exchanger 110 even if the size of the heat exchanger 110 is expanded or reduced. You can block it.

On the side of the cooling fan 140 where the expansion heat exchanger 115 is located, the outside air guided by the outside air guide cover 150 can easily pass through the expansion heat exchanger 115 while the size of the heat exchanger 110 is expanded. An external air intake unit 145 is installed to assist the movement of external air so that it can be discharged.

The outside air intake unit 145 is connected to the mixer 210 and the outside air intake line 146, and can provide suction power to suck in outside air from the outside air intake unit 145 by the suction power of sucking in the supply air from the mixer 210. there is.

When the engine body 250 is driven, the variable intercooler 100, which improves heat exchange efficiency according to an embodiment of the present invention configured in this way, generates suction force of air supply through the air supply port of the engine body 250, and the mixer 210 ), biogas and supply air are mixed, compressed through the supply air compressor (230), and then supplied to the supply air supply port (121).

The supply air entering the air supply port 121 enters the inside of the main heat dissipation tube 112 of the heat exchanger 110 and dissipates main heat while passing through the expansion heat dissipation tube 116 inserted into the main heat dissipation tube 112. Heat is spread through the main heat dissipation plate 113 connected to the tube 112.

And, as outside air is supplied in the direction where the heat exchanger 110 is located by the cooling fan 140, the outside air exchanges heat while passing between the heat dissipation plates of the heat exchanger 110, and the supply air passes through the inside of the heat exchanger 110. lower the temperature.

At this time, since the rear of the heat exchanger 110 is opened by the outdoor air guide cover 150, the outdoor air forcibly supplied by the cooling fan 140 is discharged directly to the outside through the heat exchanger 110.

The lowered temperature supply air is introduced into the supply port of the engine main body 250 through the air supply outlet 123, mixes with the fuel of the engine main body 250, and explodes, driving the engine main body 250 and The power generation device 310 is driven by the driving force and generates power.

On the other hand, when the heat exchange performance of the heat exchanger 110 decreases or the temperature of the supply air passing through the heat exchanger 110 is higher than the temperature required in the engine body 250, a variable drive mechanism is installed to expand the heat exchanger 110. (160) works.

When the variable drive mechanism 160 operates, when the expansion heat exchange unit 115 slides to the side in the main heat exchange unit 111, the external air guide cover 150 is moved to the rear of the heat exchanger 110 by the cover drive member. The external air guide cover 150 is rotated by the cover drive unit and rotates around the cover hinge unit 151 to cover the rear of the heat exchanger 110.

At the same time, as the pressing force of the fixing plate 114 is released on the expansion heat dissipation plates 117, where the gap between them was minimized, the gap support portion of each expansion heat dissipation plate 117 returns to its initial shape, and the mutual support of the expansion heat dissipation plates 117 It unfolds on the expansion heat dissipation plate (117) in a way that the gap between them widens.

Then, the intake valve opens the outside air intake line 146 so that outside air is sucked from the outside air intake unit 145 located on the side of the cooling fan 140 to the outside air intake line 146 connected to the mixer 210.

In this state, the heat exchanger 110 is expanded, the supply air entering the main heat dissipation tube 112 enters the expansion heat dissipation tube 116, the length for heat exchange with the outside air is increased, and is discharged, and the cooling fan 140 ) As the air passes between the main heat dissipation plates 113 of the main heat exchange unit 111, it primarily exchanges heat to cool the supplied air.

Here, when the expansion heat exchange part 115 protrudes from the main heat exchange part 111 and the size of the heat exchanger 110 is expanded, the speed of the cooling fan 140 can be increased because the moving distance of the outside air increases. .

The outside air that has passed through the main heat exchange unit 111 is redirected in the direction where the expansion heat exchange unit 115 is located by the outside air guide cover 150 located at the rear of the heat exchanger 110.

In addition, the outside air entering the expansion heat exchange unit 115 passes between the expansion heat dissipation plates 117 to secondarily exchange heat to cool the supply air, and passes through the expansion heat exchange unit 115 in the direction where the cooling fan 140 is located. is discharged.

At this time, in the direction opposite to the direction in which the outdoor air guide cover 150 is located centering on the expansion heat exchange unit 115, the outdoor air is sucked in from the outdoor air intake unit 145 by the suction force of the air supply air being sucked in from the mixer 210. Since the outside air whose direction is changed from the guide cover 150 to the expansion heat exchange unit 115 quickly exchanges heat while passing through the expansion heat exchange unit 115, heat exchange performance can be improved.

On the other hand, when the temperature of the supply air required by the engine body 250 is the desired temperature, the variable drive mechanism 160 operates to quickly supply outside air and simultaneously lower the output of the cooling fan 140 to maintain the main heat exchange unit 111. As the expansion heat exchanger 115 is inserted into the inside, the size of the heat exchanger 110 is reduced.

When the expansion heat exchange part 115 is inserted into the main heat exchange part 111, the expansion heat dissipation tube 116 is inserted into the main heat dissipation tube 112, and the external guide cover 150 is covered by the cover driving part. The rear of the heat exchanger 110 is opened by rotating around the hinge portion 151.

Then, the suction line is closed through the suction valve to block the suction of outside air from the outside air suction unit 145.

When the size of the heat exchanger 110 is reduced in this way, the expansion heat dissipation tube 116 is inserted into the main heat dissipation tube 112, so the moving distance of the supply air is shortened and the supply air is quickly supplied, and the cooling fan 140 ) When operating, the outside air passes between the main heat dissipation plate 112, exchanges heat with the supply air, and the supply air is cooled.

In addition, the outside air that has passed through the heat exchanger 110 can be discharged directly to the rear of the heat exchanger 110 because the rear of the heat exchanger 110 is open.

Therefore, the variable intercooler 100, which improves heat exchange efficiency according to an embodiment of the present invention, has the expansion heat exchanger 115 appear from the main heat exchanger 111 depending on the temperature of the supply air, thereby reducing the overall size of the heat exchanger 110. By expanding or contracting, the heat exchange efficiency of the heat exchanger 110 can be improved and the output of the engine body 250 can be increased to minimize the generation of NOx.

In addition, the present invention forms a variable support portion 118 that is elastically deformed on the expansion heat dissipation plate 117, so that when the expansion heat exchange portion 115 protrudes from the main heat exchange portion 111, the gap between the expansion heat dissipation plates 117 is As it expands, heat dissipation performance can be improved by widening the passage of external air, and when the expansion heat exchange part 115 is inserted into the main heat exchange part 111, the gap between the expansion heat dissipation plates 117 is narrowed to expand the heat dissipation plate 117. The inflow of foreign substances into the space can be minimized.

In addition, in the present invention, an external air guide cover 150 is installed at the rear of the heat exchanger 110, so that external air supplied from the cooling fan 140 passes not only the main heat exchange unit 111 but also the expansion heat exchange unit 115. By exchanging heat, the heat exchange efficiency of the heat exchanger 110 can be improved.

In addition, the present invention configures an outside air intake unit 145 to suck outside air into the area where the expansion heat exchange unit 115 is located with the size of the heat exchanger 110 expanded, so that the outside air passes through the main heat exchange unit 111. The movement of outside air can be guided so that it is discharged through the expansion heat exchange unit 115, and the heat exchange efficiency of the heat exchanger 110 can be improved by quickly discharging outside air.

Hereinafter, a generator engine 200 equipped with a variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention will be described.

As shown in FIG. 13, the generator engine 200 equipped with the variable intercooler 100 with improved heat exchange efficiency according to the embodiment of the present invention includes the engine body 250 in the variable intercooler 100 of the above-described embodiment. It may further include.

The engine body 250 may be an internal combustion engine driven by burning fuel, and the engine body 250 may be implemented as a biodiesel engine body 250 that uses a mixture of biogas.

The engine body 250 may be formed with a supply port through which external air is supplied and an exhaust port through which combusted gas is exhausted. The variable intercooler 100 of the above-described embodiment may be installed at the supply port, and the variable intercooler 100 ) may be connected to the air supply compressor 230.

In addition, the air supply compressor 230 is connected to the mixer 210, mixes biogas and air at a preset ratio through the mixer 210, and then supplies the mixed biogas and air through the air supply compressor 230. It can be compressed and provided as a variable intercooler (100).

Here, the air supply compressor 230 may be in the form of a turbine or a compressor.

The generator engine 200 according to the embodiment configured as described above produces supply air by mixing biogas at a preset ratio with the outside air through the mixer 210, and the manufactured supply air is compressed in the supply air compressor 230. After being supplied to the variable intercooler (100), the temperature of the air supply compressed in the variable intercooler (100) is lowered and supplied to the air supply port of the engine body (250).

By supercharging the engine body 250 by the variable intercooler 100, the explosive power of the fuel is improved, and the combustion temperature of the fuel is increased to minimize the generation of NOx, thereby preventing environmental pollution.

Here, the variable intercooler 100 is a heat exchanger ( By adjusting the size of the heat exchanger 110), the temperature of the supply air can be adjusted and supplied to the engine body 250.

Hereinafter, a biogas generator 300 equipped with a variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention will be described.

As shown in Figure 14, the biogas generator 300 equipped with a variable intercooler 100 with improved heat exchange efficiency according to an embodiment of the present invention is a power generation device 310 in the generator engine 200 of the above-described embodiment. ) may further be included.

The power generation device 310 may be driven by the generator engine 200 of the embodiment to produce electric power. The power generation device 310 can generate power through electromagnetic induction by rotating the drive shaft using the driving force generated when the generator engine 200 burns fuel.

Since the power generation device 310 has a known configuration, detailed description is omitted.

The biogas generator 300 according to the embodiment configured as described above produces supply air by mixing biogas at a preset ratio with the outside air through the mixer 210, and the manufactured supply air is compressed in the supply air compressor 230. After being supplied to the intercooler, the temperature of the air compressed in the variable intercooler (100) is lowered and supplied to the air supply port of the engine body (250).

And in the engine body 250, the fuel supply air is mixed and burned to generate driving force, and the driving force generated causes the drive shaft of the power generation device 310 to rotate to generate power.

Here, the variable intercooler 100 is configured to cause the expansion heat exchanger 115 to appear in the main heat exchanger 111 through the variable drive mechanism 160 according to the temperature of the supply air or the NOx emissions required by the engine body 250. By adjusting the size of the heat exchanger 110, the temperature of the supply air can be adjusted and supplied to the engine body 250 by adjusting the heat exchange efficiency of the heat exchanger 110.

Therefore, the biogas generator 300 of the embodiment improves the explosive power of the fuel by supercharging the engine body 250 by the variable intercooler 100 and regulates the temperature of the supply air by the variable intercooler 100 to reduce the generation of NOx. By minimizing , environmental pollution caused by NOx can be prevented and power generation performance can be improved by improving driving force.

Although the embodiments of the present invention have been described above, the scope of the rights of the present invention is not limited thereto, and the embodiments of the present invention can be easily modified by those skilled in the art in the technical field to which the present invention belongs and are recognized as equivalent. Includes all changes and modifications to the extent permitted.

[Explanation of symbols]

100: Variable intercooler 110: Heat exchanger

111: main heat exchanger 112: main heat dissipation tube

113; Main heat dissipation plate 114: Fixed plate

114a: Guide protrusion 115: Expansion heat exchange part

116: Expansion heat dissipation tube 117: Expansion heat dissipation plate

118: variable support 120: end cover

121: air supply port 123: air supply port

130: Finishing cover 131: First cover

133: second cover 140: cooling fan

145: external air intake unit 146: external air intake line

150: External guide cover 151: Cover hinge part

153: Inclined protrusion 160: Variable driving mechanism

200: engine for generator 210: mixer

230: air supply compressor 250: engine body

300: biogas generator 210: power generation device

Claims (21)

1. A variable intercooler including a heat exchanger that exchanges heat with the supply air and outside air supplied to the engine body, and a cooling fan that provides outside air so that the supply air and outside air passing through the heat exchanger exchange heat,

   The heat exchanger is

   A main heat exchange unit that exchanges heat with external air as the supply air passes through it, and

   A variable intercooler with improved heat exchange efficiency, comprising an expansion heat exchanger that is inserted or protruded from the main heat exchanger to expand or reduce the size of the heat exchanger depending on the efficiency of the heat exchanger.
2. According to paragraph 1,

   The main heat exchange part

   It includes a plurality of main heat radiation tubes through which the supply air passes,

   The expansion heat exchange part

   A variable intercooler with improved heat exchange efficiency, comprising an expansion heat dissipation tube that is connected to the main heat dissipation tube, through which the supply air passes, and slides and moves in and out of the main heat dissipation tube as it expands or contracts in the main heat exchange part.
3. According to paragraph 1,

   The expansion heat exchange part

   It includes a plurality of expansion heat dissipation plates arranged in parallel to radiate heat as the outside air passes through,

   The expansion heat dissipation plate is

   When the size of the heat exchanger is changed, the gap between the plurality of expansion heat dissipation plates is narrowed, or the gap between the plurality of expansion heat dissipation plates is protruded in a direction facing each other from the expansion heat dissipation plate so that the gap between the plurality of expansion heat dissipation plates is widened. A variable intercooler with improved heat exchange efficiency, characterized by including a variable support portion that elastically deforms and supports the plates.
4. According to paragraph 1,

   A variable intercooler with improved heat exchange efficiency, comprising a variable driving mechanism that drives the expansion heat exchanger from the main heat exchanger to change the size of the heat exchanger.
5. According to paragraph 1,

   When the heat exchanger is expanded, the cooling fan is installed in a position opposite to the position of the cooling fan with respect to the heat exchanger so that the outside air passing through the main heat exchanger is discharged while passing through the expansion heat exchanger. A variable intercooler with improved heat exchange efficiency, characterized by including an external air guide cover that guides the movement of.
6. According to clause 5,

   The external guide cover is

   A cover hinge portion rotatably coupled to the outside air guide cover to open the heat exchanger when the heat exchanger is reduced, and cover an end of the heat exchanger only when the heat exchanger is expanded, thereby guiding the movement of the outside air. A variable intercooler that improves heat exchange efficiency.
7. According to clause 6,

   The external guide cover is

   A variable intercooler with improved heat exchange efficiency, comprising a cover drive unit that rotates the external air guide cover around the cover hinge unit as the heat exchanger expands or contracts.
8. Equipped with a variable intercooler including an engine body that mixes and combusts biogas, a heat exchanger that exchanges heat with the supply air and outside air supplied to the engine body, and a cooling fan that provides outside air so that the supply air and outside air passing through the heat exchanger exchange heat. As an engine for a generator,

   The heat exchanger is

   A main heat exchange unit that exchanges heat with external air as the supply air passes through it, and

   A generator engine equipped with a variable intercooler with improved heat exchange efficiency, comprising an expansion heat exchanger that is inserted or protruded from the main heat exchanger to expand or reduce the size of the heat exchanger depending on the efficiency of the heat exchanger. .
9. According to clause 8,

   The main heat exchange part

   It includes a plurality of main heat radiation tubes through which the supply air passes,

   The expansion heat exchange part

   A variable intercooler with improved heat exchange efficiency, including an expansion heat dissipation tube that is connected to the main heat dissipation tube, passes through the supply air, and slides and moves in and out of the main heat dissipation tube as it expands or contracts in the main heat exchange part. Equipped with a generator engine.
10. According to clause 8,

    The expansion heat exchange part

    It includes a plurality of expansion heat dissipation plates arranged in parallel to radiate heat as the outside air passes through,

    The expansion heat dissipation plate is

    When the size of the heat exchanger is changed, the gap between the plurality of expansion heat dissipation plates is narrowed, or the gap between the plurality of expansion heat dissipation plates is protruded in a direction facing each other from the expansion heat dissipation plate so that the gap between the plurality of expansion heat dissipation plates is widened. A generator engine equipped with a variable intercooler with improved heat exchange efficiency, characterized by including a variable support portion that elastically deforms and supports the plates.
11. According to clause 8,

    A generator engine with a variable intercooler with improved heat exchange efficiency, comprising a variable drive mechanism that drives the expansion heat exchanger to appear and retract from the main heat exchanger in order to vary the size of the heat exchanger.
12. According to clause 8,

    When the heat exchanger is expanded, the cooling fan is installed in a position opposite to the position of the cooling fan with respect to the heat exchanger so that the outside air passing through the main heat exchanger is discharged while passing through the expansion heat exchanger. A generator engine equipped with a variable intercooler with improved heat exchange efficiency, characterized by including an external guide cover that guides the movement of.
13. According to clause 12,

    The external guide cover is

    A cover hinge portion rotatably coupled to the outside air guide cover to open the heat exchanger when the heat exchanger is reduced, and cover an end of the heat exchanger only when the heat exchanger is expanded, thereby guiding the movement of the outside air. A generator engine equipped with a variable intercooler that improves heat exchange efficiency.
14. According to clause 13,

    The external guide cover is

    A generator engine with a variable intercooler with improved heat exchange efficiency, comprising a cover drive unit that rotates the external air guide cover around the cover hinge unit as the heat exchanger expands or contracts.
15. An engine body that mixes and combusts biogas, a power generation device driven by the engine body, a heat exchanger that exchanges heat with the supply air and outside air supplied to the engine body, and an engine body that provides outside air so that the supply air and outside air passing through the heat exchanger exchange heat. A biogas generator equipped with a variable intercooler including a cooling fan,

    The heat exchanger is

    A main heat exchange unit that exchanges heat with external air as the supply air passes through it, and

    A biogas generator equipped with a variable intercooler with improved heat exchange efficiency, comprising an expansion heat exchanger that is inserted or protruded from the main heat exchanger to expand or reduce the size of the heat exchanger depending on the efficiency of the heat exchanger. .
16. According to clause 15,

    The main heat exchange part

    It includes a plurality of main heat radiation tubes through which the supply air passes,

    The expansion heat exchange part

    A variable intercooler with improved heat exchange efficiency, comprising an expansion heat dissipation tube that is connected to the main heat dissipation tube, through which the supply air passes, and slides and moves in and out of the main heat dissipation tube as it expands or contracts in the main heat exchange part. Equipped with biogas generator.
17. According to clause 15,

    The expansion heat exchange part

    It includes a plurality of expansion heat dissipation plates arranged in parallel to radiate heat as the outside air passes through,

    The expansion heat dissipation plate is

    When the size of the heat exchanger is changed, the gap between the plurality of expansion heat dissipation plates is narrowed, or the gap between the plurality of expansion heat dissipation plates is protruded from the expansion heat dissipation plate in a direction facing each other so that the gap between the plurality of expansion heat dissipation plates is widened. A biogas generator equipped with a variable intercooler with improved heat exchange efficiency, characterized in that it includes a variable support portion that elastically deforms and supports the plates.
18. According to clause 15,

    A biogas generator equipped with a variable intercooler with improved heat exchange efficiency, comprising a variable drive mechanism that drives the expansion heat exchanger to appear and exit from the main heat exchanger in order to vary the size of the heat exchanger.
19. According to clause 15,

    When the heat exchanger is expanded, the cooling fan is installed in a position opposite to the position of the cooling fan with respect to the heat exchanger so that the outside air passing through the main heat exchanger is discharged while passing through the expansion heat exchanger. A biogas generator equipped with a variable intercooler with improved heat exchange efficiency, characterized by including an external guide cover that guides the movement of.
20. According to clause 19,

    The external guide cover is

    A cover hinge portion rotatably coupled to the outside air guide cover to open the heat exchanger when the heat exchanger is reduced and to cover an end of the heat exchanger only when the heat exchanger is expanded to guide the movement of the outside air. A biogas generator equipped with a variable intercooler that improves heat exchange efficiency.
21. According to clause 20,

    The external guide cover is

    A biogas generator with a variable intercooler with improved heat exchange efficiency, comprising a cover drive unit that rotates the external air guide cover around the cover hinge unit as the heat exchanger expands or contracts.

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