JP7315629B2 - air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air conditioner, and more particularly to an air conditioner in which an engine drives a compressor.

[Related technology]
The present invention claims priority under Article 4 of the Paris Convention based on Korean Patent Application No. 10-2020-0113761 (filing date: September 7, 2020) and is based on the disclosure of the Korean Patent Application. For reference, the contents of the specification and drawings of the Korean patent application are incorporated into the present specification.

An air conditioner is a device that cools or heats a room using a heat pump cycle that includes (includes, configures, etc.) a compressor, an outdoor heat exchanger, an expansion mechanism, and an indoor heat exchanger.

In the heat pump cycle, a compressor must be driven in order to circulate the refrigerant, and air conditioners are roughly classified into EHP (Electric Heat Pump) and GHP (Gasengine-driven Heat Pump) types according to the compressor driving method.

The GHP system is a system that drives a compressor using an engine that uses gas as fuel. Fuel costs are low, and cooling and heating capacity can be increased, making it suitable for use in industrial applications and large buildings.

Patent Document 1 (Korea Patent No. 10-2019-0051347) discloses a GHP air conditioner. However, the air conditioner in the above document discloses a structure in which an engine and a compressor are arranged in a plurality of configurations such as an outdoor heat exchanger and a radiator, and in one device. Since the engine produces power by using the explosive force of combustion of gas fuel, the vibration and noise are relatively large, and the heat generated by itself is generated, which may affect the performance and durability of other components including the outdoor heat exchanger. In particular, since the heat exchanger has a structure in which a plurality of refrigerant pipes are connected to each other, problems such as breakage of the connecting portions of the plurality of refrigerant pipes and the creation of gaps occur when vibrations from the engine are directly transmitted.

In addition, in the case of a structure that supplies fuel to the engine or exhausts combusted gas, it occupies a large volume, so there is a problem that the space occupied by the structure related to the compressor and the structure in which the cooling water flows is relatively narrow.

In addition, the outdoor unit of GHP is often installed on the roof of a building, etc., but the outdoor unit in which the engine is installed is very heavy, so it is very difficult to move, and the load acting on the limited area is excessive, which may limit installation.

Also, the outdoor unit of the GHP is internally provided with a controller for controlling the engine and engine-related components. Configurations other than the engine and its associated components can be driven by separate controllers. Controllers for controlling components other than the engine and its related components have the problem that the cost increases as the number of controllers increases.

In addition, when the outdoor unit of the GHP is arranged inside the outdoor heat exchanger, accessibility to the outdoor heat exchanger is reduced, which makes servicing difficult.

Korean Patent No. 10-2019-0051347

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide an air conditioner that minimizes the transmission of vibrations from the engine to the heat pump arrangement excluding the compressor.

Another object of the present invention is to provide an air conditioner that increases the efficiency of a radiator and a plate heat exchanger that exchange heat with cooling water.

Still another object of the present invention is to provide an air conditioner in which the components included in the outdoor unit of the air conditioner are efficiently arranged. In particular, in the case of a unit in which a heat exchanger is arranged, it is an object of the present invention to provide an air conditioner which is arranged so that the structure arranged inside the heat exchanger is highly accessible to service work.

Still another object of the present invention is to provide an air conditioner capable of reducing costs by minimizing the number of controllers arranged in the outdoor unit to control the components to be driven.

Another object of the present invention is to provide an air conditioner that can be easily inspected and repaired by an operator by arranging connectors for connecting a control box, refrigerant pipes, and cooling water pipes, which mainly require service in an outdoor unit, to adjacent parts of the panel. Another object of the present invention is to provide an air conditioner capable of quickly cooling the heat generated from the control box.

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

[One aspect of the present invention]
The present invention can propose the following as one aspect thereof.
[1] An air conditioner,
A first outdoor unit including an engine driven by fuel combustion and a compressor driven by the engine;
A second outdoor unit that is spaced apart from the first outdoor unit and includes an outdoor heat exchanger that exchanges heat between the refrigerant discharged from the compressor and the outdoor air, a cooling water pump that supplies cooling water to the engine, and a radiator that exchanges heat between the cooling water and the outdoor air;
a first refrigerant pipe exposed to the outside of the first outdoor unit and the second outdoor unit and connected to the compressor;
An air conditioner comprising: a cooling water pipe arranged exposed to the outside of the first outdoor unit and the second outdoor unit and connecting the engine and the cooling water pump.
[2] The second outdoor unit is
A plate heat exchanger that exchanges heat between cooling water and refrigerant;
a first valve that sends cooling water discharged from the engine to the plate heat exchanger or the radiator;
a second valve that sends cooling water discharged from the engine to the first valve or the cooling water pump;
The air conditioner according to [1], wherein the cooling water pump is arranged between the plate heat exchanger and the radiator.
[3] The second outdoor unit comprises a second case forming an outer shape, forming an inlet on the peripheral surface, and forming an outlet on the upper side,
The second case is
a front panel disposed in front of the second case;
a rear panel spaced behind the front panel;
a pair of side panels connecting the ends of the front panel and the rear panel respectively;
The air conditioner according to [1], wherein the front panel includes a first half panel inside which a second control box is arranged, and a second half panel arranged on one side of the first half panel and inside which the outdoor heat exchanger is arranged.
[4] The outdoor heat exchanger is
a front heat exchanger located inside said front panel;
a first side heat exchanger bent from the front heat exchanger and extended rearward;
a rear heat exchanger located inside the rear panel and extending from the first side heat exchanger;
a second side heat exchanger bent from the rear heat exchanger and extended forward;
The air conditioner according to [1], wherein the front heat exchanger is arranged behind the second half panel.
[5] The air conditioner according to [4], wherein the cooling water pump is arranged behind the second half panel and is arranged closer to the reference line than the first side heat exchanger.
[6] The air conditioner according to [4], wherein the cooling water pump extends in the left-right direction from the center in the front-rear direction and is arranged in front of an imaginary horizontal line dividing the second outdoor unit in the front-rear direction.
[7] The first outdoor unit includes a first controller box containing a first controller that adjusts the operation of the engine,
The air conditioner according to [1], wherein the second outdoor unit includes a blower fan that forms air flow in the outdoor heat exchanger, and a second control box that incorporates a second controller that adjusts the operation of the blower fan or the cooling water pump.
[8] The second outdoor unit includes a switching valve that sends the refrigerant discharged from the compressor to the outdoor heat exchanger or an indoor heat exchanger that exchanges heat with the air in the indoor space,
The air conditioner according to [7], wherein the second controller adjusts the switching valve so as to adjust the flow of refrigerant discharged from the compressor.
[9] The second outdoor unit includes a second case that forms an outer shape, an intake port is formed on the peripheral surface, and an outlet port is formed on the upper side;
The blower fan is disposed inside the orifice and causes the air existing inside the second case to flow from the suction port to the discharge port,
The air conditioner according to [7], wherein the second control box is arranged below the orifice.
[10] The second case is arranged in an area where the outdoor heat exchanger is not arranged, and includes a second service panel on which a second connector is arranged, in which a plurality of refrigerant pipes and a plurality of cooling water pipes connecting the first outdoor unit and the second outdoor unit are connected,
The air conditioner according to [9], wherein the second control box is arranged inside the second service panel.
[11] The second service panel is formed with an opening communicating with the second control box disposed inside,
The air conditioner according to [10], wherein the second service panel is provided with a second cover that opens and closes the opening.
[12] In the first case,
a first base covering the underside;
a first perimeter panel positioned above the first base and covering a perimeter surface; and a first top panel positioned above the first perimeter panel and forming an outlet;
the engine is fixed to the base;
The air conditioner according to [12], wherein the first control box is arranged adjacent to the upper panel from the engine.
[13] The first surrounding panel includes a first connector in which a plurality of refrigerant pipes and a plurality of cooling water pipes connecting the first outdoor unit and the second outdoor unit are connected, and a first service panel in which the first control box is arranged,
The air conditioner according to [12], wherein the first service panel is provided with a first cover that covers an opening formed to communicate with the inside of the first control box arranged inside.

In order to achieve the above object, an air conditioner according to an embodiment of the present invention includes: a first outdoor unit including an engine driven by combustion of fuel and a compressor operated by the driving of the engine; a second outdoor unit spaced apart from the first outdoor unit and including an outdoor heat exchanger for exchanging heat between refrigerant discharged from the compressor and outdoor air; a cooling water pump for supplying cooling water to the engine; A cooling water pump is arranged in the second outdoor unit together with a radiator by including a first refrigerant pipe exposed to the outside of the outdoor unit and arranged to connect the compressor and the switching valve, and a cooling water pipe exposed to the outside of the first outdoor unit and the second outdoor unit and arranged to connect the engine and the cooling water pump.

The second outdoor unit includes a plate heat exchanger that exchanges heat between cooling water and a refrigerant, a first valve that sends cooling water discharged from the engine to the plate heat exchanger or the radiator, and a second valve that sends the cooling water discharged from the engine to the first valve or the cooling water pump. The cooling water pump is arranged between the plate heat exchanger and the radiator, and the cooling water pump is arranged adjacent to the radiator and the plate heat exchanger.

The second outdoor unit includes a second case forming an outer shape, forming an intake port on a peripheral surface, and forming an outlet port on an upper side, wherein the second case includes a front panel disposed in front of the second case, a rear panel spaced behind the front panel, and a pair of side panels connecting both ends of the front panel and the rear panel, respectively. a second half panel on which the outdoor heat exchanger is arranged.

The outdoor heat exchanger includes a front heat exchanger disposed inside the front panel, a first side heat exchanger bent from the front heat exchanger and extending rearward, a rear heat exchanger disposed inside the rear panel and extending from the first side heat exchanger, and a second side heat exchanger bent from the rear heat exchanger and extending forward, wherein the front heat exchanger is disposed behind the second half panel and is an outdoor heat exchanger at the first half panel. can serve an internal configuration that is located inside the .

The cooling water pump is arranged at the rear of the second half panel and is arranged closer to the reference line than the first side heat exchanger, so that the cooling water pump can be arranged at a position that is easy to service.

The cooling water pump extends in the left-right direction from the center in the front-rear direction and is arranged in front of an imaginary horizontal line that partitions the second outdoor unit in the front-rear direction.

The first outdoor unit includes a first control box containing a first controller that regulates the operation of the engine, and the second outdoor unit includes a blower fan that forms an air flow in the outdoor heat exchanger and a second control box that contains a second controller that regulates the operation of the blower fan or the cooling water pump, so that the first controller can control engine-related components and the remaining components can be controlled by the second controller.

The second outdoor unit may include a switching valve that sends refrigerant discharged from the compressor to the outdoor heat exchanger or an indoor heat exchanger that exchanges heat with air in an indoor space, and the second controller may adjust the switching valve to adjust the flow of the refrigerant discharged from the compressor, and the second controller may control the switching valve.

The second outdoor unit includes a second case forming an outer shape, forming an inlet on a peripheral surface and forming an outlet on an upper side, and an orifice disposed at an upper end of the second case and forming a discharge passage for the air blown by the blower fan. The blower fan is arranged inside the orifice to cause the air existing inside the second case to flow from the inlet to the outlet, and the second control box is arranged below the orifice. , can create an air flow to the second control box.

The second case is arranged in a region where the outdoor heat exchanger is not arranged, and includes a second service panel on which a second connector is arranged to connect a plurality of refrigerant pipes and a plurality of cooling water pipes connecting the first outdoor unit and the second outdoor unit, and the second control box is arranged inside the second service panel to facilitate access to the second control box.

The second service panel is formed with an opening that communicates with the second control box arranged inside, and the second service panel is provided with a second cover that opens and closes the opening so that the inside of the second control box can be easily accessed.

The first case includes a first base covering a lower side, a first surrounding panel disposed above the first base and covering a surrounding surface, and a first upper panel disposed above the first surrounding panel and forming an exhaust port, wherein the engine is fixed to the base, and the first control box is disposed adjacent to the top panel from the engine to allow the first control box to be disposed at a distance from the engine.

The first peripheral panel includes a first connector for connecting a plurality of refrigerant pipes and a plurality of cooling water pipes connecting the first outdoor unit and the second outdoor unit, and a first service panel in which the first control box is arranged. A first cover is arranged in the first service panel to cover an opening formed to communicate with the inside of the first control box arranged inside, so that the inside of the first control box can be easily serviced.

Other specifics of the embodiments are included in the detailed description and drawings.

According to the air conditioner of the present invention, there are one or more of the following effects.

First, the first outdoor unit, in which the compressor for driving the outdoor unit by the engine is arranged, and the second outdoor unit, in which the plurality of heat exchangers are arranged, are arranged apart from each other, thereby minimizing the transmission of vibration due to engine driving to the second outdoor unit, thereby ensuring the reliability of the outdoor heat exchanger.

Second, the radiator, the plate heat exchanger, and the cooling water pump are arranged adjacent to each other inside the second outdoor unit to ensure the flow rate of the cooling water, so that heat exchange in the radiator or the plate heat exchanger can be performed quickly.

Third, there is an advantage that the arrangement of the internal components arranged inside the outdoor heat exchanger can be adjusted and the internal components arranged inside the outdoor heat exchanger can be easily serviced.

Fourthly, the first outdoor unit has a first controller that controls the engine and engine-related components, and the second outdoor unit has a second controller that controls the operation of the blower fan and cooling water pump. When a structure such as a cooling water pump is added to the first outdoor unit, a controller for operation control is required separately from the engine, but the above arrangement has the advantage of minimizing the number of controllers and reducing costs.

Fifth, there is an advantage that the control box can be easily serviced without separating the service panel through a separate opening in the service panel including the service panel on which the control box is arranged. In addition, the control box can be maintained at a low temperature by arranging it far from the heat source inside the outdoor unit or arranging it in an area where air flow is active.

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

1 is a system diagram of an air conditioner according to an embodiment of the present invention; FIG. 1 is a perspective view of a first outdoor unit and a second outdoor unit of an air conditioner according to an embodiment of the present invention; FIG. 1 is a front view of a first outdoor unit and a second outdoor unit of an air conditioner according to one embodiment of the present invention; FIG. 1 is a rear perspective view of a first outdoor unit according to one embodiment of the present invention; FIG. 1 is a front view of a first outdoor unit according to one embodiment of the present invention; FIG. 1 is a rear perspective view of the first outdoor unit of one embodiment of the present invention with surrounding panels removed; FIG. 1 is a front perspective view of the first outdoor unit of one embodiment of the present invention with surrounding panels removed; FIG. 1 is a side view of the first outdoor unit of one embodiment of the present invention with the surrounding panel, upper cover and frame removed; FIG. 1 is a plan view of the first outdoor unit of one embodiment of the present invention with surrounding panels, an upper cover and a frame removed; FIG. FIG. 4 is a rear perspective view of a second outdoor unit according to one embodiment of the present invention; FIG. 4 is a front view of a second outdoor unit according to one embodiment of the present invention; Fig. 3 is a front perspective view of the second outdoor unit of one embodiment of the invention with the surrounding panel removed; Fig. 2 is a front perspective view of the second outdoor unit of one embodiment of the present invention with the surrounding panel, top panel and blower fan removed; FIG. 4 is a plan view of the second outdoor unit of one embodiment of the present invention from which the surrounding panel, upper panel and blower fan are removed; FIG. 4 is a rear view of the second outdoor unit of one embodiment of the present invention with the peripheral panel, upper panel, blower fan, outdoor heat exchanger, and radiator removed; Fig. 2 is a front perspective view of the second outdoor unit of one embodiment of the present invention with the surrounding panel, upper panel, blower fan, outdoor heat exchanger and radiator removed; FIG. 4 is a diagram for explaining the relationship between a first outer refrigerant pipe and an outer cooling water pipe according to one embodiment of the present invention; FIG. 4 is a system diagram of an air conditioner according to another embodiment of the present invention;

Advantages and features of the present invention, as well as the manner in which they are achieved, will become apparent with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and can be embodied in various other different forms. However, the present embodiments are provided so that the disclosure of the present invention will be complete and will allow those of ordinary skill in the art to which the present invention pertains to fully understand the scope of the invention, and the present invention is defined only by the claims. Like reference numerals refer to like elements throughout the specification.

Front (F), rear (R), left (Le), right (Ri), upper (U), and lower (D) indications in FIGS. 2 to 17 are for explaining the air conditioner according to the present embodiment. Therefore, when the criteria change, the direction setting may be understood differently.

Hereinafter, the present invention will be described with reference to the drawings for explaining an air conditioner according to embodiments of the present invention.

<Overall composition>

Referring to FIG. 1, the air conditioner of the present invention includes a first outdoor unit 100 that drives an engine 140 and a compressor 150 with gas fuel, a second outdoor unit 200 that exchanges heat between the refrigerant discharged from the compressor 150 and the outdoor air or the cooling water that cools the engine 140 with the outdoor air or the refrigerant, a cooling water pipe 400 that connects the first outdoor unit 100 and the second outdoor unit 200 and through which the cooling water flows, It includes a first outer refrigerant pipe (or first refrigerant pipe) 310 that connects the first outdoor unit 100 and the second outdoor unit 200 and through which the refrigerant flows.

The air conditioner of the present invention includes at least one indoor unit (not shown) connected to the second outdoor unit 200, and includes a second outer refrigerant pipe (or second refrigerant pipe) 320 that connects the second outdoor unit 200 and the indoor unit and through which the refrigerant flows.

The first outdoor unit 100 and the second outdoor unit 200 are separated from each other. The first outdoor unit 100 and the second outdoor unit 200 are connected by a cooling water pipe 400 and a first outer refrigerant pipe 310 . Therefore, it is possible to minimize the transmission of vibration to the second outdoor unit 200 due to the driving of the engine 140 and the compressor 150 included in the first outdoor unit 100 .

<1st outdoor unit>

The first outdoor unit 100 includes an engine 140 (see FIGS. 6 and 7) driven by combustion of gas fuel, a compressor 150 (see FIG. 6) that is connected to the engine 140 by a belt 152 and compresses a refrigerant, and a first case 110 (see FIGS. 4 and 5) that forms an outer shape and forms a space in which the engine 140 and the compressor 150 are arranged.

The first case 110 includes a first base 112 (see FIG. 4) covering the lower side, a first frame 114 (see FIG. 6) arranged vertically above the first base 112 and forming a framework, a first surrounding panel 122 (see FIG. 4) arranged above the first base 112 and connected to the first frame 114 to cover the surrounding surface, and an exhaust port 128 arranged above the first surrounding panel 122. forming a first top panel 126 (see FIG. 6).

Referring to FIG. 6 , the first base 112 can be fixed to the ground and can secure the structure located inside the first case 110 . The first base 112 includes a first base panel 116, a first base supporter 118 arranged below the first base panel 116 to space the first base panel 116 upward from the ground, and a first base frame 120 arranged above the first base panel 116 and partially fixed.

Referring to FIG. 8, the first base 112 includes two first base frames 120 spaced apart from each other on the upper side of the first base panel 116 . The first base frame 120 has a substantially U-shaped cross section and both ends thereof are fixed to the first base panel 116 . Since the first base frame 120 is fixed to the first base panel 116 at both bent ends, the vibration generated in the damper 146 described below can be damped and transmitted to the first base panel 116 .

Referring to FIG. 7, the first frames 114 are arranged at the corners of the first base panel 116 respectively. The first peripheral panel 122 is connected to the spaced first frames 114 and arranged to cover the peripheral surface of the first outdoor unit 100 .

Referring to FIG. 7, the first frame 114 includes a plurality of first corner frames 114a arranged at each corner of the first base 112 and first middle frames 114b arranged between the first corner frames 114a.

The first surrounding panel 122 includes a first front panel 122a disposed on one side, a first rear panel 122b spaced apart from the first front panel 122a and disposed parallel to the first front panel 122a, and two first side panels 122c and 122d disposed between the first front panel 122a and the first rear panel 122b. 4 and 5, the first front panel 122a and the first rear panel 122b have the same size, and the two first side panels 122c and 122d have the same size.

Referring to FIG. 5, the first front panel 122a is divided into a 1-1 half panel 122a1 and a 1-2 half panel 122a2 which are arranged in the horizontal direction with the first middle frame 114b interposed therebetween.

The first peripheral panel 122 includes a first service panel 123 on which a first connector 124 to which the first outer refrigerant pipe 310 and the outer cooling water pipe (or cooling water pipe) 410 are connected is arranged. Referring to FIG. 5, the first-second half panel 122a2 may be used as the first service panel 123. As shown in FIG. The first service panel 123 is arranged between the first middle frame 114b and the first corner frame 114a. A first control box 180 described below is arranged inside the first service panel 123 .

That is, the first service panel 123 can be detachably arranged to improve accessibility to the first control box 180 . Also, the refrigerant pipe 300 and the cooling water pipe 400 connected to the first connector 124 arranged on the first service panel 123 can be easily serviced.

A first connector 124 to which the first outer refrigerant pipe 310 and the outer cooling water pipe 410 are connected is arranged on the first service panel 123 . A first connector 124 is arranged at the lower end of the first service panel 123 .

The first service panel 123 is formed with an opening communicating with the inside of the first control box 180 arranged inside, and a first cover 125a is arranged to cover the opening. The first cover 125 a is arranged on the top of the first service panel 123 and can open and close an opening communicating with the first control box 180 .

A first control box 180 is located at the top of the first service panel 123 . That is, the first control box 180 is disposed above the first service panel 123 so as to be separated from the engine 140, thereby minimizing the transfer of heat generated from the engine 140 to the first control box 180.

Referring to FIG. 5, the 1-1 half panel 122a1 is formed with an opening communicating with the inside of the circuit box 182 disposed inside, and a third cover 125b is disposed to cover the opening. The third cover 125b is arranged at the lower end of the 1-1 half panel 122a1 and can open and close the opening communicating with the circuit box 182. As shown in FIG.

Referring to FIG. 6, the first upper panel 126 is not provided with a separate fan and is formed with an exhaust port 128 through which air heated by the engine 140 is discharged. An upper cover 130 is disposed on the first upper panel 126 to prevent water from entering from the outside through the exhaust port 128 . In addition, an exhaust gas outlet 128 is arranged in the first upper panel 126 to release the exhaust gas discharged from the engine 140 to the outside.

A first upper grill 132 is disposed above the first upper panel 126 to cover the upper side of the first upper panel 126 . The first top grill 132 may have a grid or stripe pattern to prevent external objects from falling onto the first top panel 126 without impeding air flow.

Engine 140 is an internal combustion engine that operates by the process of burning compressed gas. The engine 140 rotates an engine-side pulley 142 (see FIG. 1) disposed on one side of the engine 140 through four strokes of intake, compression, explosion, and exhaust.

Referring to FIG. 7 , the first outdoor unit 100 includes an engine frame 144 that fixes the placement of the engine 140 above the first base 112, and a damper 146 that connects the engine frame 144 and the first base 112 and dampens vibrations caused by the operation of the engine 140. The first outdoor unit 100 includes multiple dampers 146 . Referring to FIGS. 6-7, four dampers 146 are spaced apart from each other.

Each of the multiple dampers 146 connects the engine frame 144 and the first base 112 . Each of the plurality of dampers 146 has a lower end coupled to the first base frame 120 and an upper end coupled to the engine frame 144 .

Engine frame 144 is coupled to engine 140 on one side and coupled to damper 146 on the other side. Therefore, it is possible to minimize the transmission of vibrations due to the operation of the engine 140 to the entire first case 110 .

The engine frame 144 can fix the arrangement of the compressor 150 that is connected to the engine 140 by a belt 152 . That is, the engine frame 144 spaces the engine 140 and the compressor 150 from the first base 112 at a constant distance.

Compressor 150 may be coupled to engine 140 and compress refrigerant when engine 140 operates. Two compressors 150 connected to the engine 140 are arranged in the first outdoor unit 100 . The compressor 150 includes an engine-side pulley 142 and a compressor-side pulley 154 connected to a belt 152. Operation of the engine 140 rotates the compressor-side pulley 154 (see FIG. 1) to compress refrigerant.

6 and 7, the first outdoor unit 100 includes an air cleaner 160 that filters air supplied to the engine 140 to supply clean air, a zero governor 162 that supplies gas supplied to the engine 140 at a constant pressure, a mixer 164 that mixes the gas and air supplied through the air cleaner 160 and the zero governor 162, an exhaust gas heat exchanger 166 that exchanges heat between the gas discharged from the engine 140 and cooling water, and the engine 14. 0 and a drain filter 170 for purifying and exhausting condensed water generated from the exhaust gas passing through the muffler 168 .

The zero governor 162 always supplies fuel at a constant pressure regardless of changes in the pressure of the fuel flowing into the zero governor 162 and the flow rate. The zero governor 162 provides a stable outlet pressure over a wide range, allowing the pressure of the gaseous fuel supplied to the engine to be adjusted substantially constant in atmospheric pressure form.

The air cleaner 160 may filter the external air supplied to the engine to block entry of water and oil in the form of dust and mist.

The mixer 164 discharges the supplied fuel and air at a constant mixing ratio and supplies them to the engine.

The zero governor 162 may be fixedly arranged on one side of the first frame 114 . Air cleaner 160 is arranged adjacent to zero governor 162 . The air cleaner 160 is fixed to the first upper panel 126 by a separate fixing member 184 .

The muffler 168 may be fixedly arranged on one side of the first frame 114 . The muffler 168 is arranged above the drain filter 170 and condensed water generated from the muffler 168 flows into the drain filter 170 . The drain filter 170 may be fixedly arranged on the first base 112 . Referring to FIG. 7 , the drain filter 170 may be fixedly arranged on the upper side of the first base frame 120 . Exhaust gas outlet 134 may be located above muffler 168 . Therefore, exhaust gas that has passed through the muffler can be discharged to the outside through the exhaust gas outlet 134 .

The first outdoor unit 100 includes an oil tank 172 that stores oil, and an oil pump 174 that supplies the oil stored in the oil tank 172 to the engine. Oil pump 174 may supply oil stored in oil tank 172 to the engine to preheat or cool engine 140 .

The oil tank 172 may be fixedly arranged on the upper side of the first base panel 116 . The oil tank 172 may be arranged between two first base frames 120 spaced apart from each other.

The first outdoor unit 100 includes a first control box 180 having a built-in first controller (not shown) for adjusting the driving of the engine 140 or the compressor 150, and a circuit box 182 having a transformer (not shown) for changing current and voltage signals.

The first control box 180 is spaced apart from the engine 140 . Referring to FIG. 7, engine 140 is fixedly positioned on first base 112 and first control box 180 is positioned adjacent first top panel 126 . The first control box 180 is spaced apart from the engine 140 as much as possible in the inner space defined by the first surrounding panel 122 , the first base 112 and the first top panel 126 . Transfer of heat generated from the engine 140 to the first control box 180 can be minimized.

The first control box 180 is arranged behind the first service panel 123 . The first control box 180 is disposed between the first middle frame 114b and the first corner frame 114a, and is fixed to the first middle frame 114b and the first corner frame 114a.

<Second outdoor unit>

The second outdoor unit 200 includes a second case 210 (see FIG. 10) that forms an outer shape, has a second suction port 221b formed on the peripheral surface, and forms a discharge port on the upper side; 10, a cooling water pump 238 (see FIG. 12), which is placed inside the second case 210 and supplies cooling water to the engine 140 or the exhaust gas heat exchanger 166, and a switching valve 242 (see FIG. 13), which is placed inside the second case 210 and sends the refrigerant discharged from the compressor 150 to the outdoor heat exchanger 240 or the indoor unit.

The second case 210 includes a second base 212 (see FIG. 12) covering the lower side, a second frame 218 (see FIG. 12) arranged vertically on the upper side of the second base 212 to form a framework, a second surrounding panel 220 (see FIG. 10) arranged above the second base 212 and connected to the second frame 218 to cover the surrounding surface, and arranged above the second surrounding panel 220 to provide an exhaust port 1. 28 and a second top panel 226 (see FIG. 12).

The second base 212 includes a second base panel 214 and a second base supporter 216 disposed below the second base panel 214 to space the second base panel 214 upward from the ground.

A second frame 218 is positioned at each corner of the second base panel 214 . The second surrounding panel 220 is arranged to be connected to the spaced second frames 218 so as to cover the second outdoor unit 200 .

The second frame 218 includes a plurality of second corner frames 218a (see FIG. 12) arranged at each corner of the second base 212 and second middle frames (not shown) arranged between the second corner frames 218a.

10 to 11, the second peripheral panel 220 includes a second front panel 220a arranged on one side, a second rear panel 220b arranged parallel to the second front panel 220a and spaced apart from the second front panel 220a, and two second side panels 220c and 220d arranged between the second front panel 220a and the second rear panel 220b. The second front panel 220a and the second rear panel 220b have the same size, and the two second side panels 220c and 220d have the same size.

Referring to FIG. 11, when viewed from the front, the second front panel 220a is divided into a 2-1 half panel 220a1 and a 2-2 half panel 220a2 that are arranged in the horizontal direction.

The second peripheral panel 220 may include a second service panel 223 on which a second connector 222a to which the first outer refrigerant pipe 310 and the outer cooling water pipe 410 are connected is arranged. Referring to FIG. 11, the 2-2 half panel 220a2 may be used as the second service panel 223. As shown in FIG. A second service panel 223 is positioned between the second middle frame 218b and the second middle frame 218b. A second control box 256 described below is arranged inside the second service panel 223 .

Referring to Tokyo 11, the second service panel 223 is provided with a second connector 222a to which the first outer refrigerant pipe 310 and the outer cooling water pipe 410 are connected. A second connector 222 a is arranged at the lower end of the second service panel 223 .

Referring to FIG. 11, the second service panel 223 is provided with a third connector 222b to which the second outer refrigerant pipe 320 is connected. The third connector 222b may be spaced apart in one direction from the second connector 222a and may be arranged at the same height as the second connector 222a.

The second service panel 223 is formed with an opening communicating with the inside of the second control box 256 arranged inside, and a second cover 225 is arranged to cover the opening. The second cover 225 is arranged on the upper end of the second service panel 223 and can open and close an opening communicating with the second control box 256 .

A second control box 256 is located at the upper end of the second service panel 223 . That is, the second control box 256 is arranged adjacent to the blower fan 230 arranged on the upper part of the second surrounding panel 220, and quickly forms an air convection around the second control box 256 to cool the second control box 256.

The second upper panel 226 is formed with at least one outlet 226a. Referring to FIG. 12, the second upper panel 226 is formed with two outlets 226a, and a blower fan 230 is arranged below each of the outlets 226a. An orifice 228 in which a blower fan 230 is arranged is arranged on the underside of the second upper panel 226 .

A fan 230 and a second upper grill 232 covering the second upper panel 226 are disposed above the second upper panel 226 .

Referring to FIGS. 10 and 11, the second peripheral panel 220 may have a second suction port 221b formed in a lower portion thereof to communicate the inside and the outside of the second case 210, and a cover portion 221a covering the outside of the blower fan 230 and the orifice 228 may be disposed above the second suction port 221b. The second service panel 223 may form a cover portion as a whole without forming an inlet.

Referring to FIGS. 2 and 3, the second case 210 may have the same size as the first case 110 . That is, the second base 212 included in the second case 210 has the same size as the first base 112 included in the first case 110 . Also, the second surrounding panel 220 included in the second case 210 may have the same size as the first surrounding panel 122 included in the first case 110 . As described above, since the first base 112 and the second base 212 have the same size, and the first peripheral panel 122 and the second peripheral panel 220 have the same size, each configuration can be produced in the same manufacturing process. This enables simplification of the production process of the first case 110 and the second case 210, resulting in a reduction in manufacturing costs.

The outdoor heat exchanger 240 is arranged inside the second inlet 221 b formed in the second surrounding panel 220 . The outdoor heat exchanger 240 may be arranged on at least two sides where the second surrounding panel 220 of the second case 210 is arranged. The outdoor heat exchangers 240 may be arranged side by side on the four sides formed by the second surrounding panel 220 .

Referring to FIG. 14, the outdoor heat exchangers 240 include a front heat exchanger 240a arranged inside the second front panel 220a, a first side heat exchanger 240b extending from the front heat exchanger 240a and arranged inside the second side panel 220c, a rear heat exchanger 240c extending from the first side heat exchanger 240b and arranged inside the second rear panel 220b, and a rear heat exchanger 240c. and a second side heat exchanger 204d extending from and positioned inside the other second side panel 220d.

The front heat exchanger 240a may be half or less in size than the rear heat exchanger 240c. The second side heat exchanger 204d may be formed with a size less than half that of the first side heat exchanger 240b.

The outdoor heat exchanger 240 is not arranged inside the second service panel 223 . Therefore, the outdoor heat exchanger 240 is not arranged inside the 2-1 half panel 220a1 of the second front panel 220a. That is, the front heat exchanger 240a is arranged inside the 2-2 half panel 220a2.

Internal components arranged inside the second outdoor unit 200 are mainly arranged behind the 2-1 half panel 220a1. Here, the internal components arranged inside the second outdoor unit 200 are components arranged inside the second surrounding panel 220 excluding the outdoor heat exchanger 240 and the radiator 250 . That is, the internal configuration includes an accumulator 246 , a plate heat exchanger 248 , a cooling water tank 254 and a cooling water pump 238 . The internal configuration also includes a switching valve 242 and cooling water valves 252a and 252b.

Referring to FIG. 14, the accumulator 246, the plate heat exchanger 248, and the cooling water tank 254 are arranged in the area where the second service panel 223 is arranged with reference to an imaginary vertical line (VC) extending in the front-rear direction from the second middle frame 218b.

In addition, the oil separator 244 and the cooling water pump 238 are arranged in the opposite area of the second service panel 223 with respect to the imaginary vertical line (VC), but are arranged adjacent to the imaginary vertical line (VC) from the first side heat exchanger 240b.

The outdoor heat exchanger 240 may be located inside the second perimeter panel 220 except for the second service panel 223 . The outdoor heat exchanger 240 forms one end inside the 2-2 half panel 220a2 of the second front panel 220a, and forms the other end inside the second side panels 220c and 220d arranged adjacent to the 2-1 half panel 220a1.

A blower fan 230 is disposed above the outdoor heat exchanger 240 to flow air to the outlet 226 a formed in the second upper panel 226 . Above the outdoor heat exchanger 240, an orifice 228 is arranged to form a space in which air flows to the outlet 226a and in which the blower fan 230 is arranged.

Cooling water pump 238 delivers cooling water to engine 140 and exhaust gas heat exchanger 166 to cool engine 140 and exhaust gas heat exchanger 166 . The cooling water pump 238 may be fixedly arranged on the second base 212 .

Referring to FIG. 18 , the cooling water pump 238 may be arranged in the first outdoor unit 100 . Even if the cooling water pump 238 is arranged in the first outdoor unit 100, no additional cooling water pipes or refrigerant pipes are exposed to the outside of the first outdoor unit 100 and the second outdoor unit 200, so the cooling water pump 238 can be arranged in the first outdoor unit 100. However, it is preferable that the cooling water pump 238 is installed inside the second outdoor unit 200 as shown in FIG.

The switching valve 242 is arranged inside the second case 210 and sends the refrigerant discharged from the compressor 150 to the outdoor heat exchanger 240 or the indoor unit. A switching valve 242 may route refrigerant supplied from an indoor unit or a plate heat exchanger 248 described below to the compressor 150 . Switching valve 242 is connected to oil separator 244 and accumulator 246 . Therefore, the refrigerant discharged from the compressor 150 and passed through the oil separator 244 flows into the switching valve 242 . Also, the refrigerant flowing from the switching valve flows to the compressor 150 via the accumulator 246 . The switching valve 242 may be a four-way valve that selectively connects refrigerant pipes connected in four directions.

1 and 14, the second outdoor unit 200 includes an oil separator 244 that separates the oil in the refrigerant discharged from the compressor 150, an accumulator 246 that separates the refrigerant supplied to the compressor 150 and supplies gas-phase refrigerant to the compressor 150, a plate heat exchanger 248 that exchanges heat between the cooling water and the refrigerant, a radiator 250 that exchanges heat between the cooling water and the outdoor air, and a cooling water valve that adjusts the flow direction of the cooling water. 252a, 252b and a cooling water tank 254 for storing cooling water. The second outdoor unit 200 may further include a supercooling heat exchanger 260 that expands and heat-exchanges a portion of the flowing liquid refrigerant to cool the flowing liquid refrigerant, and an expansion valve 262 that expands the refrigerant discharged from the outdoor heat exchanger 240.

An oil separator 244 is positioned between the switching valve 242 and the compressor 150 . Oil separator 244 separates oil from the refrigerant discharged from compressor 150 . The oil separator 244 may be fixedly positioned on the second base panel 214 .

Accumulator 246 is positioned between switching valve 242 and compressor 150 . The second base panel 214 separates the refrigerant entering the compressor 150 into vapor phase refrigerant and liquid refrigerant and directs the vapor phase refrigerant to the compressor 150 . The accumulator 246 may be fixedly positioned on the second base panel 214 . Accumulator 246 has a cylindrical cylindrical form.

Referring to FIG. 1, accumulator 246 is supplied with refrigerant flowing through four-way valve 242 from an indoor heat exchanger (not shown) or refrigerant flowing through plate heat exchanger 248 . In addition, the accumulator 246 is connected to the supercooling heat exchanger 260 and supplied with the refrigerant generated from the supercooling heat exchanger 260 .

The plate heat exchanger 248 exchanges heat between the cooling water flowing by the cooling water pump 238 and the refrigerant flowing by the compressor 150 . In a heating mode in which an indoor heat exchanger (not shown) installed in the indoor unit is used as a condenser, the refrigerant that has passed through the indoor heat exchanger (not shown) can flow to the plate heat exchanger 248 . Also, in the heating mode, the cooling water flowing by the cooling water pump 238 flows to the plate heat exchanger 248 and is cooled.

The plate heat exchanger 248 heat-exchanges coolant flowing from an indoor heat exchanger (not shown) with cooling water discharged from the engine 140 . The plate heat exchanger 248 is connected to the first valve 252 a and the cooling water pump 238 , exchanges heat with cooling water flowing through the first valve 252 a , and supplies the cooling water to the cooling water pump 238 . The plate heat exchanger 248 exchanges heat with the refrigerant flowing from the indoor heat exchanger and supplies the refrigerant to the accumulator 246 .

A plate heat exchanger 248 may be fixedly positioned on the second base panel 214 . Referring to FIG. 17, plate heat exchanger 248 is positioned between accumulator 246 and oil separator 244 when viewed from above.

The radiator 250 can reduce the temperature of the cooling water by exchanging heat between the cooling water and the air flowing through the second inlet 221b. The radiator 250 is arranged inside the outdoor heat exchanger 240 . The area occupied by the radiator 250 in the direction of the second inlet 221b may be smaller than the area occupied by the outdoor heat exchanger 240 in the direction of the second inlet 221b. Referring to FIG. 13 , the vertical length (250L) of the radiator 250 is shorter than the vertical length (240L) of the outdoor heat exchanger 240 .

The radiator 250 includes a front radiator 250a arranged inside the front heat exchanger 240a, a first side radiator 250b arranged inside the first side heat exchanger 240b, a rear radiator 250c arranged inside the rear heat exchanger 240c, and a second side heat exchanger 250d arranged inside the second side heat exchanger 204d.

Referring to FIG. 13, the cooling water valves 252a, 252b include a first valve 252a that sends the cooling water discharged from the engine 140 to the plate heat exchanger 248 or the radiator 250, and a second valve 252b that sends the cooling water discharged from the engine 140 to the first valve 252a or the cooling water pump 238. The first valve 252a and the second valve 252b may be three-way valves that selectively supply flowing cooling water in one of two directions.

Referring to FIG. 12, the second outdoor unit 200 includes a second control box 256 containing a second controller (not shown) that regulates the operation of the blower fan 230 and cooling water pump 238 .

A second control box 256 is located inside the second service panel 223 . Inside the second control box 256, a second control for adjusting the operation of the blower fan 230 and the cooling water pump 238 is arranged. That is, the operations of the blower fan 230 and the cooling water pump 238 can be controlled by one electrical component. If the cooling water pump 238 is installed inside the first outdoor unit 100, a separate electrical component for controlling the operation of the cooling water pump 238 may be required. In the present invention, the operation of the blower fan 230 and the cooling water pump 238 can be adjusted together by the second control located inside the second control box 256, so the cost for additional parts is not increased. The second controller can also adjust the opening and closing of the switching valves or cooling water valves 252a, 252b.

That is, the second controller adjusts the switching valve 242 to send the refrigerant discharged from the compressor 150 to the outdoor heat exchanger 240 when the air conditioner is in the cooling mode, and adjusts the switching valve 242 to send the refrigerant discharged from the compressor 150 to the indoor heat exchanger when the air conditioner is in the heating mode.

In addition, the second controller adjusts the cooling water valves 252 a and 252 b to send the cooling water discharged from the engine 140 to the radiator 250 when the air conditioner is in the cooling mode, and adjusts the cooling water valves 252 a and 252 b to send the cooling water discharged from the engine 140 to the plate heat exchanger 248 when the air conditioner is in the heating mode.

The components arranged inside the second outdoor unit 200 are arranged adjacent to the area not blocked by the outdoor heat exchanger 240 .

Referring to FIG. 14, the front heat exchanger 240a is arranged facing the rear heat exchanger 240c. However, the lateral extension length (240aL) of the front heat exchanger 240a may be less than half the lateral extension length (240cL) of the rear heat exchanger 240c.

The first side heat exchanger 240b is arranged to face the second side heat exchanger 240d. However, the longitudinally extending length (240dL) of the second side heat exchanger 240d may be less than half the longitudinally extending length (240bL) of the first side heat exchanger 240b.

The lateral extension length (240cL) of the rear heat exchanger 240c may be 1.5 to 2 times the longitudinal extension length (240bL) of the first side heat exchanger 240b.

The second outdoor unit 200 has areas unobstructed by the outdoor heat exchanger 240 on the front and right sides.

Referring to FIG. 14, the second outdoor unit 200 is divided into four areas by a virtual vertical line (VC) that extends in the front-rear direction (FR) from the center in the left-right direction (Ri-Le) and divides the second outdoor unit 200 in the left-right direction, and a virtual horizontal line (HC) that extends in the left-right direction (Ri-Le) from the center in the front-rear direction (FR) and divides the second outdoor unit 200 in the front-rear direction.

Referring to FIG. 14, the second outdoor unit 200 is divided into a first area (I) arranged on the front right side, a second area (II) arranged on the rear right side, a third area (III) arranged on the front left side, and a fourth area (IV) arranged on the rear left side with reference to the vertical line (VC) and the horizontal line (HC).

Referring to FIG. 14, the outdoor heat exchanger 240 is not arranged in the first area (I). A second service panel 223 is arranged in front of the first area (I). Thus, when the second service panel is separated, the structure located inside the second case can be repaired or inspected.

Therefore, the components arranged inside the second outdoor unit 200 may be arranged in the first area (I) or the second area (II). Referring to FIG. 14, the accumulator 246 and plate heat exchanger 248 are located in the second region (II). Referring to FIG. 14, the cooling water tank 254 is arranged in the first area (I).

It may be arranged in the third area (III) or the fourth area (IV) so as to effectively utilize the inner area of the second case 210 . However, the configuration located in the third region (III) or the fourth region (IV) is located adjacent to the vertical line (VC) from the first side heat exchanger 240b so that the configuration can be easily repaired or inspected by a user or the like.

That is, referring to FIG. 14, the cooling water pump 238 disposed in the third region (III) is formed such that the distance (D1) separated from the vertical line (VC) is smaller than the distance (D2) separated from the first side heat exchanger 240b. In addition, the cooling water pump 238 arranged in the third region (III) is formed such that the distance (D3) separated from the imaginary reference line (V1) extending in the longitudinal direction from the end of the front heat exchanger 240a arranged forward is smaller than the distance (D2) separated from the first side heat exchanger 240b.

Referring to FIG. 14, cooling water pump 238 is positioned between radiator 250 and plate heat exchanger 248 . Here, between the radiator 250 and the plate heat exchanger 248 can mean between the inlet and outlet ends of the radiator 250 and the plate heat exchanger 248 . Referring to FIG. 14, the inlet and outlet ends of the radiator 250 may be formed at the ends of the front radiator 250a.

Since the cooling water pump 238 is disposed adjacent to the radiator 250 and the plate heat exchanger 248, it is advantageous to ensure the flow rate of the cooling water flowing through the radiator 250 and the plate heat exchanger 248, thereby increasing the heat exchange speed.

Each of the switching valve 242 and the oil separator 244 located in the fourth region is located adjacent to the vertical line (VC) from the first side heat exchanger 240b.

<Refrigerant pipe and cooling water pipe>

Referring to FIG. 1, the refrigerant pipe 300 sends the refrigerant discharged from the compressor 150 to the outdoor heat exchanger 240 or an indoor heat exchanger (not shown), and the heat-exchanged refrigerant can be circulated to the compressor 150 again. The refrigerant pipe 300 includes a first inner refrigerant pipe 330 arranged inside the first outdoor unit 100, a second inner refrigerant pipe 340 arranged inside the second outdoor unit 200, and a third inner refrigerant pipe (not shown) arranged inside the indoor unit (not shown). In addition, the refrigerant pipe 300 includes a first outer refrigerant pipe 310 exposed to the outside of the first outdoor unit 100 and the second outdoor unit 200 and connecting the first outdoor unit 100 and the second outdoor unit 200, and a second outer refrigerant pipe 320 disposed outside the second outdoor unit 200 and the indoor unit and connecting the second outdoor unit 200 and the indoor unit.

The cooling water pipe 400 allows the cooling water discharged from the cooling water pump 238 to pass through the exhaust gas heat exchanger 166, the engine 140, the radiator 250, or pass through the plate heat exchanger 248 and be circulated back to the cooling water pump 238.

Referring to FIG. 1, the cooling water pipe 400 includes a first inner cooling water pipe 420 arranged inside the first outdoor unit 100, a second inner cooling water pipe 430 arranged inside the second outdoor unit 200, and an outer cooling water pipe 410 arranged outside the first outdoor unit 100 and the second outdoor unit 200 and connecting the first outdoor unit 100 and the second outdoor unit 200.

Referring to FIGS. 2 and 3 , the first outer refrigerant pipe 310 and the outer cooling water pipe 410 connect the first outdoor unit 100 and the second outdoor unit 200 . Referring to FIG. 17, the first outer refrigerant pipe 310 and the outer cooling water pipe 410 include at least one bending portion 312, 412 so as not to transmit vibration generated from the first outdoor unit 100 to the second outdoor unit 200. Referring to FIG. 17 , each of the first outer refrigerant pipe 310 and the outer cooling water pipe 410 includes four bending portions 312 and 412 .

The length of cooling water pipe 400 is set in consideration of the performance of cooling water pump 238 . The performance of the cooling water pump 238 must allow cooling water flow throughout the cooling water pipe 400 including the radiator 250 . Therefore, since the length of the cooling water pipe 400 is limited to the performance range of the cooling water pump 238, it is preferable to minimize the length of the outer cooling water pipe 410. FIG. On the other hand, compared to the performance of the cooling water pump 238, the compressor 150 is driven by the engine 140 and connected to a plurality of indoor units.

Therefore, referring to FIG. 17, the length of the first outer coolant pipe 310 exposed to the outside (L1+2*H1+2*W1, “the length of the first outer coolant pipe”) is longer than the length of the outer cooling water pipe 410 exposed to the outside (L2+2*H2+2*W2, “the length of the outer coolant pipe”).

The first outer refrigerant pipe 310 connects the first outdoor unit 100 and the second outdoor unit 200 arranged adjacent to each other, and the second outer refrigerant pipe 320 connects the second outdoor unit 200 and the indoor unit (not shown) arranged in different spaces. Therefore, the length (L1+2*H1+2*W1) of the first outer refrigerant pipe 310 may be shorter than the exposed length of the second outer refrigerant pipe 320 (not shown, "the length of the second outer refrigerant pipe").

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described specific embodiments, and of course, various modifications can be made by those who have ordinary knowledge in the technical field to which the invention pertains without departing from the gist of the invention claimed in the claims, and such modifications should not be understood individually from the technical idea and perspective of the present invention.

100: first outdoor unit 110: first case 112: first base 114: first frame 122: first surrounding panel 123: first service panel 124: first connector 126: first upper panel 128: exhaust port 130: upper cover 140: engine 144: engine frame 146: damper 150: compressor 160: air cleaner 162: Zero governor 164: Mixer 166: Exhaust gas heat exchanger 168: Muffler 170: Drain filter 172: Oil tank 174: Oil pump 180: First control box 182: Circuit box 200: Second outdoor unit 210: Second case 212: Second base 218: Second frame 220: Second surrounding panel 222a: Second connector 223: Second service panel 226: Second upper panel 230: Blower fan 232: Second upper grill 238: Cooling water pump 240: Outdoor heat exchanger 242: Switching valve 244: Oil separator 246: Accumulator 248: Plate heat exchanger 250: Radiator 254: Cooling water tank 256: Second control box 300: Refrigerant pipe 310: First outer refrigerant pipe 320: Second outer refrigerant pipe 330: First inner refrigerant pipe 340: Second inner refrigerant pipe 400: Cooling water pipe 410: Outer cooling water pipe 420: First inner cooling water pipe 430: Second inner cooling water pipe

Claims (13)

an air conditioner,
A first outdoor unit including an engine driven by fuel combustion and a compressor driven by the engine;
A second outdoor unit that is spaced apart from the first outdoor unit and includes an outdoor heat exchanger that exchanges heat between the refrigerant discharged from the compressor and the outdoor air, a cooling water pump that supplies cooling water to the engine, and a radiator that exchanges heat between the cooling water and the outdoor air;
a first refrigerant pipe exposed to the outside of the first outdoor unit and the second outdoor unit and connected to the compressor;
An air conditioner comprising: a cooling water pipe arranged exposed to the outside of the first outdoor unit and the second outdoor unit and connecting the engine and the cooling water pump. The second outdoor unit is
A plate heat exchanger that exchanges heat between cooling water and refrigerant;
a first valve that sends cooling water discharged from the engine to the plate heat exchanger or the radiator;
a second valve that sends cooling water discharged from the engine to the first valve or the cooling water pump;
The air conditioner according to claim 1, wherein said cooling water pump is arranged between said plate heat exchanger and said radiator. The second outdoor unit comprises a second case forming an outer shape, forming an inlet on the peripheral surface, and forming an outlet on the upper side,
The second case is
a front panel disposed in front of the second case;
a rear panel spaced behind the front panel;
a pair of side panels connecting the ends of the front panel and the rear panel respectively;
The air conditioner according to claim 1, wherein the front panel comprises a first half panel inside which a second control box is arranged, and a second half panel arranged on one side of the first half panel and inside which the outdoor heat exchanger is arranged. The outdoor heat exchanger is
a front heat exchanger located inside said front panel;
a first side heat exchanger bent from the front heat exchanger and extended rearward;
a rear heat exchanger located inside the rear panel and extending from the first side heat exchanger;
a second side heat exchanger bent from the rear heat exchanger and extended forward;
4. The air conditioner according to claim 3 , wherein the front heat exchanger is arranged behind the second half panel. 5. The air conditioner according to claim 4, wherein the cooling water pump is arranged rearward of the second half panel and adjacent to an imaginary reference line extending in the longitudinal direction from an end of the front heat exchanger arranged forward of the first side heat exchanger . 5. The air conditioner according to claim 4, wherein the cooling water pump is arranged in front of an imaginary horizontal line that extends in the left-right direction from the center in the front-rear direction and partitions the second outdoor unit in the front-rear direction. The first outdoor unit includes a first control box containing a first controller that adjusts the operation of the engine,
2. The air conditioner according to claim 1, wherein the second outdoor unit includes a blower fan that forms air flow in the outdoor heat exchanger, and a second control box that incorporates a second controller that adjusts the operation of the blower fan or the cooling water pump. The second outdoor unit includes a switching valve that sends the refrigerant discharged from the compressor to the outdoor heat exchanger or an indoor heat exchanger that exchanges heat with the air in the indoor space,
8. The air conditioner according to claim 7, wherein said second controller adjusts said switching valve so as to adjust the flow of refrigerant discharged from said compressor. The second outdoor unit includes a second case forming an outer shape, forming an intake port on the peripheral surface, and forming an outlet port on the upper side;
The blower fan is disposed inside the orifice and causes the air existing inside the second case to flow from the suction port to the discharge port,
The air conditioner according to claim 7, wherein said second control box is arranged below said orifice. The second case is arranged in a region where the outdoor heat exchanger is not arranged, and a second connector is arranged in which a plurality of refrigerant pipes and a plurality of cooling water pipes connecting the first outdoor unit and the second outdoor unit are connected.
The air conditioner according to claim 9, wherein said second control box is arranged inside said second service panel. The second service panel is formed with an opening communicating with the second control box arranged inside,
11. The air conditioner according to claim 10, wherein the second service panel is provided with a second cover that opens and closes the opening. The first outdoor unit comprises a first case,
The first case is
a first base covering the underside;
a first perimeter panel positioned above the first base and covering a perimeter surface; and a first top panel positioned above the first perimeter panel and forming an outlet;
the engine is fixed to the base;
8. The air conditioner of claim 7 , wherein the first control box is located closer to the top panel than the engine. The first peripheral panel includes a first connector in which a plurality of refrigerant pipes and a plurality of cooling water pipes connecting the first outdoor unit and the second outdoor unit are connected, and a first service panel in which the first control box is arranged,
13. The air conditioner according to claim 12, wherein the first service panel is provided with a first cover that covers an opening formed to communicate with the inside of the first control box arranged inside.