JPH0240432A - Outdoor unit of engine driven type heat pump equipment - Google Patents

Abstract

PURPOSE:To build an outdoor unit in compact size and to improve its heat- exchanging performance by stacking an engine cooling radiator and outdoor heat exchangers vertically to form a stacked body having a U shape, housing components of a refrigerant circulating line inside the stacked body, and installing a fan on the top of the stacked body. CONSTITUTION:An outdoor unit 51 is built in such a way that an engine cooling radiator 42 and outdoor heat exchangers 10 and 110 are vertically stacked so as to form a stacked body 61 having a U shape plane view, and a fan 15 is installed on the upper portion of the stacked body so as to exhaust air from the stacked body 61. And components of a refrigerant circulating line are housed inside the stacked body 61. By this constitution, the outdoor unit 51 can be built in a compact size as both inside and outside surfaces of the unit 51 are effectively used. In addition, the heat-exchanging performance is improved because air in the stacked body can be exhausted and an enough amount of air can be passed through the radiator and the heat exchangers by the fan.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an outdoor unit of an engine-driven heat pump device equipped with a refrigerant circulation circuit driven by an engine.

(Prior Art) Conventionally, in an engine-driven heat pump device, a radiator for cooling the engine and an outdoor heat exchanger for cooling the refrigerant in the refrigerant circulation circuit are combined together with a fan for forced cooling. 6 In the above configuration, the radiator is installed together with the engine inside a soundproof wall, and the outdoor heat exchanger and fan are installed horizontally on the top surface of this soundproof wall, as shown in Japanese Patent Application Laid-Open No. 60-101443. There are some that are lined up in the same direction.

(Problems to be Solved by the Invention) By the way, in the conventional configuration described above, since the radiator and the outdoor heat exchanger are separated by a soundproof wall, heat exchange by the fan is not sufficiently promoted in the radiator. There is a risk.

In addition, since the outdoor heat exchanger and the fan are installed horizontally side by side, the top side of this outdoor unit is not used effectively, and there is no space between the outdoor heat exchanger and the fan. A relatively large surplus space is created. For these reasons, conventional outdoor units have become large, and there is still room for improvement in terms of making them more compact.

(Purpose of the Invention) This invention has been made in view of the above-mentioned circumstances, and aims to sufficiently promote heat exchange by a radiator or an outdoor heat exchanger by a fan, and to improve the outdoor The aim is to make the unit as small as possible.

Another object of the present invention is to enable the outdoor heat exchangers of each system to exchange heat with the outside air evenly when a plurality of refrigerant circulation circuits are provided.

Furthermore, it is an object of the present invention to prevent the hot air generated when the radiator is forcibly cooled by the fan from having a thermal effect on each refrigerant circulation circuit.

In addition, if a waste heat exchanger is installed that transfers the temperature of the engine cooling water to the refrigerant in the refrigerant circulation circuit, this waste heat exchanger can be used to transfer the tanks that make up the refrigerant circulation circuit to the radiator or outdoor heat exchanger. The purpose is to provide reasonable protection from thermal effects caused by the equipment.

(Structure of the Invention) A feature of the present invention for achieving the above object is that an engine cooling radiator and a refrigerant outdoor heat exchanger included in a refrigerant circulation circuit are stacked vertically, and this stacked body is formed into a flat surface. The laminate is formed into a U-shape when viewed, and a fan for discharging the air inside the laminate is provided on the top of the laminate, and the components of the refrigerant circulation circuit are housed within the laminate.

In addition, in the above configuration, a plurality of refrigerant circulation circuits may be provided, the outdoor heat exchanger of each refrigerant circulation circuit may be divided into a plurality of upper and lower parts, and these divided bodies may be arranged vertically differently in each system. .

Further, in each of the above configurations, it is preferable that the radiator is disposed at the top, while the refrigerant piping unit of the refrigerant circulation circuit is disposed at the lower part of the stacked body.

Furthermore, in the above configuration, a waste heat heat exchanger is provided for transmitting the temperature of the engine cooling water to the refrigerant of the refrigerant circulation circuit, and this waste heat heat exchanger is formed into an annular shape in plan view and is disposed at the lower part of the stacked body. However, tanks such as a liquid separator constituting a refrigerant circulation circuit may be housed in this waste heat exchanger.

(for production) The effects of the above configuration are as follows.

The radiator 42 and the outdoor heat exchanger 10.110 are stacked vertically to form the stacked body 61 in a U-shape in plan view.
Since the outdoor unit 51 is configured such that a fan 15 is provided at the top and the air inside the stacked body 61 is exhausted by the operation of the fan 15, the air inside the stacked body 61 is not exhausted when the fan 15 is operated. As a result, the outside air sufficiently passes through the radiator 42 and the outdoor heat exchangers 10 and 110, so that heat exchange with the outside air is sufficiently performed in these.

Furthermore, since the fan 15 is provided on the upper part of the stacked body 61 as described above, and the components of the refrigerant circulation circuit 3.103 are housed within the stacked body 61, this outdoor unit 51
Each exterior surface and interior space is effectively utilized.

In the above configuration, a plurality of refrigerant circulation circuits 3.103 are provided, and the outdoor heat exchangers 10, 110 of each refrigerant circulation circuit 3, 103 are divided into a plurality of upper and lower parts, and these divided bodies are divided into upper and lower parts in each system. If they are arranged in different parts, even if the passing wind speed is high in the part near the fan 15 and slow in the part far from the fan 15, each refrigerant circulation circuit 3,
Heat exchange between the outdoor heat exchangers 10 and 110 of 103 is performed evenly.

In the above configuration, if the radiator 42 is placed at the top and the refrigerant piping unit 65 of the refrigerant circulation circuit 3.103 is placed at the bottom of the stack 61, when the radiator 42 is forcibly cooled by the fan 15. This prevents hot air from having a thermal effect on each refrigerant circulation circuit 3.103.

Furthermore, in the above configuration, when a waste heat heat exchanger 45.145 is provided for transmitting the temperature of the cooling water for the engine l to the refrigerant of the refrigerant circulation circuit 3.103, this waste heat heat exchanger 45.145 is arranged in a flat surface. The laminated body 6 is formed into an annular shape when viewed.
A liquid separator 18.1 is disposed at the lower part of the waste heat exchanger 45.145 and constitutes a refrigerant circulation circuit 3,103 within the waste heat exchanger 45.145.
If you store 18 grade tanks, the waste heat exchanger will be 45゜1.
45 is also housed in this stacked body 61 and the outdoor unit 51
In this case, the waste heat exchangers 45 and 145 prevent the air that has passed through the outdoor heat exchangers 10 and 110 from hitting the tanks.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing an air conditioner as an example of an engine-driven heat pump device.

In the figure, l is an engine, and this engine 1 is driven by gas fuel such as city gas or propane gas. 2
is the starting motor of this engine l.

Further, the device has two mutually independent first and second refrigerant circulation circuits 3.103, both of which are operated simultaneously by the engine 1.

Since both the refrigerant systems 3.103 have almost the same configuration, the first refrigerant circulation circuit 3 will be mainly explained, and the second refrigerant circulation circuit 103 will be described with reference numerals corresponding to the first refrigerant circulation circuit 3 (for example, 5 The reference numeral 105) corresponding to 105 is attached to the drawings, and the explanation thereof will be omitted.

The first refrigerant circulation circuit 3 has a compressor 5 driven by the engine 1. The compressor 5 compresses a refrigerant such as fluorocarbon into a high-temperature, high-pressure gas. The discharge side of this compressor 5 is equipped with a discharge pipe 6, and the suction side is equipped with a suction pipe 7. Further, a four-way switching valve 8 is interposed between the discharge pipe 6 and the suction pipe 7.

An outdoor heat exchanger 10 is provided outdoors, and a pair of indoor heat exchangers 11 and 11 are provided in parallel indoors. The four-way switching valve 8 and the outdoor heat exchanger 10 are connected by a first pipe 12, the outdoor heat exchanger 10 and the indoor heat exchanger 11, 11 are connected by a second pipe 13, and the The four-way switching valve 8 and the indoor heat exchanger 11.11 are connected to the third pipe 1.
Connected by 4. In the above case, the first refrigerant circulation circuit 3
A common fan 15.15 is provided for the outdoor heat exchanger IO and the outdoor heat exchanger 110 of the second refrigerant circulation circuit 103, so that forced heat exchange with the outside air is performed. There is.

An oil separator 16 is interposed in the middle of the discharge pipe 6, and this oil separator 16 separates oil in the discharge pipe 6 and returns this oil to the suction pipe 7 through an oil return pipe 17. Further, a liquid separator 18 is interposed in the middle of the suction pipe 7, and this liquid separator 18 separates liquid from the refrigerant passing through the suction pipe 7, and causes only gas to be sucked into the compressor 5. Make it. Furthermore, an expansion valve 2o, a check valve 2.1.22.23, and a liquid receiver 24 are interposed in the middle of the second pipe 13.

In the first refrigerant circulation circuit 3 described above, when the four-way switching valve 8 is operated to bring it into the state shown by the solid line in the figure and the compressor 5 is driven by the engine l, the first refrigerant circulation circuit 3 This becomes a cooling circuit as shown by the arrow.

That is, the refrigerant is compressed by the compressor 5 and becomes a high-temperature, high-pressure gas, which is then passed through the discharge pipe 6, the four-way switching valve 8, and the first pipe 12.
It is sent to the outdoor heat exchanger 10 through. This refrigerant radiates heat and condenses into a high-pressure liquid, which passes through the check valve 22 and is temporarily stored in the liquid receiver 24.
It is fed into each indoor heat exchanger 11.11. Then, this refrigerant is depressurized and evaporated into a low-temperature, low-pressure atomized state, and at this time, the room is cooled by the indoor heat exchanger 11.11. Furthermore, this refrigerant returns to the compressor 5 through the third pipe 14, the four-way switching valve 8, the suction pipe 7, and the liquid separator 18, completing the cycle.

On the other hand, when the four-way switching valve 8 is switched to the state shown by the phantom line in the figure, the first refrigerant circulation circuit 3 becomes a heating circuit as shown by the phantom line arrow in the figure, contrary to the above.

That is, after the refrigerant is compressed by the compressor 5 and becomes a high-temperature, high-pressure gas, the discharge pipe 6, the four-way switching valve 8, and the third pipe 14
and into each indoor heat exchanger 11.11. The indoor heat exchanger 11.11 then heats the room, and at this time, the refrigerant condenses into a high-pressure liquid. Furthermore,
This refrigerant passes through the check valve 23, the liquid receiver 24, the expansion valve 20-1, and the second pipe 13, and is sent to the outdoor heat exchanger lO, where it is heated and becomes a gas.
This is then connected to the first pipe 12. Four-way switching valve 8, suction pipe 7
, and returns to the compressor 5 through the liquid separator 18 to complete the cycle.

On the other hand, the indoor heat exchanger 1 is connected to the second refrigerant circulation circuit 103.
Only one indoor heat exchanger Ill having the same capacity as No. 1 is provided.

In the above configuration, a bypass circuit 28 is provided that connects the discharge pipe 6 and the suction pipe 7, and this bypass circuit 28 has a bypass valve 29 in the middle thereof. Further, a pressure sensor 30 is provided to detect the pressure of the refrigerant in the discharge pipe 6. Then, when the discharge capacity of the compressor 5 increases and the compressor 5 exceeds a predetermined discharge capacity, that is,
When the pressure of the refrigerant in the discharge pipe 6 exceeds a predetermined value, a detection signal from the pressure sensor 30 causes the bypass valve 29 to be opened. Note that this detection signal may be electrical or electronic, or may be physical such as directly transmitting pressure through piping. This also applies to each detection signal described later.

Then, for example, if the discharge capacity of the compressor 105 of the second refrigerant circulation circuit 103 is appropriate, and on the other hand, the first refrigerant 1fa
If the compressor 5 of the rM circuit 3 exceeds a predetermined discharge capacity, the bypass valve 29 corresponding to this other compressor 5 opens, and the refrigerant discharged from this compressor 5 is transferred to the bypass circuit 28 and the bypass valve 29. The air is then short-circuited and circulated from the discharge pipe 6 of the compressor 5 to the suction pipe 7. Then, the pressure of the refrigerant in the discharge pipe 6 decreases, and therefore, the capacity of the other compressor 5 is prevented from becoming excessive.

By the way, as mentioned above, the refrigerant discharged from the compressor 5 passes through the bypass circuit 28 and the bypass valve 29, and circulates from the discharge pipe 6 of the compressor 5 to the suction pipe 7, and if this continues for a long time, this The temperature of the refrigerant may rise and become too high. This undesirably increases the load on the compressor 5 unnecessarily.

Therefore, in order to prevent the above-mentioned inconvenience, the following configuration is adopted. That is, in addition to the above configuration, a superheat prevention circuit 32 is provided that connects the suction pipe 7 and the second pipe 13, and a superheat prevention valve 33 and an electromagnetic on-off valve 34 are provided in the middle of this superheat prevention circuit 32. are interposed in series.

In the above case, the operation of the on-off valve 34 is to open the bypass valve 29,
It is made to coincide with the valve closing operation.

Further, the connection portion of the overheat prevention circuit 32 to the suction pipe 7 is closer to the compressor 5 than the connection portion of the oil return pipe 17 to the suction pipe 7, and furthermore, the connection portion of the overheat prevention circuit 32 to the suction pipe 7 is closer to the compressor 5 than the connection portion of the oil return pipe 17 to the suction pipe 7. A temperature sensing tube 35 is provided to detect the temperature of the refrigerant. When the temperature of this refrigerant becomes too high and exceeds a predetermined temperature, the overheat prevention valve 33 is opened in response to a detection signal from the temperature sensing cylinder 35.

Then, as described above, when the temperature of the refrigerant in the suction pipe 7 becomes high and the overheating prevention valve 33 is opened by the temperature sensing tube 35, the The refrigerant with a low target temperature is the second pipe 13,
Overheat prevention circuit 32, overheat prevention valve 33, and on-off valve 34
The refrigerant flows into the discharge pipe 6 through the refrigerant, thereby lowering the temperature of the refrigerant in this portion to prevent the temperature from becoming excessively high.

On the other hand, the engine l is provided with an engine cooling circuit 37 for cooling it.

That is, a cooling water passage 38 is formed in the engine l, and a pump 3 feeds cooling water into this cooling water passage 38.
9 is provided. Further, a radiator 42 is provided between an outlet pipe 40 extending from the cooling water passage 38 and an inlet pipe 41 connected to the suction side of the pump 39, and this radiator 42 is also installed outside the fan 15. It is now forced to cool down.

When cooling water is sent into the cooling water passage 38 by the pump 39, the engine 1 is cooled, and the high temperature cooling water is cooled by the radiator 42 and returned to the pump 39.

Further, in the above configuration, the first and second refrigerant circulation circuits 3.
When 103 is used as a heating circuit, in order to make it more effective, it is configured as follows.

That is, when the first and second refrigerant circulation circuits 3.103 are used as heating circuits as shown by the imaginary line arrows in the figure, the temperature of the cooling water in the engine cooling circuit 37 is adjusted to A double-tube waste heat heat exchanger 45 is provided which communicates to the circulation circuit 3.103.

On the other hand, a thermostat 46 is interposed in the middle of the outlet pipe 40, and extends from the thermostat 46 to the artificial pipe 4.
A waste heat pipe 47 connected to 1 is provided. The waste heat exchanger 45 is configured to transmit the temperature of the cooling water in the waste heat pipe 47 to the refrigerant in the first pipe 12.

Therefore, in the first pipe 12, the refrigerant i is transferred from the cooling water by the amount of heat given to the compressor 5.105 by the engine l.
It is possible to effectively perform heating by suppressing the drive of the heater.

In the above case, the waste heat pipe 47 is provided with an electromagnetic cooling water valve 4.
8 is provided. This cooling water valve 48 operates in the opposite direction to the bypass valve 29 and the on-off valve 34, and when the compressor 5 exceeds a predetermined discharge capacity, that is, the pressure of the refrigerant in the discharge pipe 6 reaches a predetermined level. When the value is exceeded, the detection signal from the pressure sensor 30 causes the cooling water valve 48 to close.

Therefore, for example, when the heating by the indoor heat exchanger 111 of the second refrigerant circulation circuit 103 becomes excessive and the discharge capacity of the compressor 105 exceeds a predetermined value, the cooling water valve 48 is closed and the second refrigerant Heat is no longer transferred from the cooling water to the refrigerant in the circulation circuit 103. Therefore, that amount of heat is given to the refrigerant in the first refrigerant circulation circuit 3, thereby effectively performing heating.

In FIGS. 1 and 3, 51 is an outdoor unit, and this outdoor unit 51 has a base 52. As shown in FIG. This base 5
A case 53 made of sheet metal is provided on one side of the engine 2, and the engine 1 is housed within this case 53. An intake pipe 54 extends from the engine 1, and an air cleaner 55 is attached to the extending end of the intake pipe 54. The air cleaner 55 is placed on the upper surface of the case 53, and a cover 56 made of sheet metal is provided to cover the air cleaner 55. Further, 57 is an exhaust pipe, and 58 is a muffler. Each compressor 5.105 is simultaneously driven by the engine 1 via a V-belt transmission means 59.

In the above case, the air cleaner 55 is provided outside the case 53 in order to reduce the influence of heat from the engine 1. Therefore, the hot air from the engine 1 causes the air cleaner 5 to
5 is prevented from being heated and prematurely deteriorating its components. Further, since heating of the intake air of the engine 1 is also prevented, the performance of the engine 1 is maintained at a good level.

The radiator 42 and 1. The outdoor heat exchangers 10.11O are stacked vertically on the base 52, and this stacked body 61 is formed in a U-shape when viewed from above. The laminated body 61 is adjacent to the case 53, and the opening 62 of the laminated body 61 in a plan view is connected to the case 53 and the cover integral 5.
It is closed by 6.

The upper surface of the cover unit 56 and the upper surface of the laminate 61 are approximately at the same height, and the fan 15.degree. 1.5 is supported on a frame 63 provided on these upper surfaces. When this fan 15.15 operates, the air inside the laminate 61 is sucked into the cover 56 and the laminate 6, as shown by the arrow in the figure.
1 through the upper ends of the outside air, sufficient heat exchange is carried out with the outside air by passing it through the radiator 42 and the outdoor heat exchanger 10, 110.

The waste heat exchanger 45 is formed into an annular shape when viewed from above, and is disposed below the stacked body 61 in order to effectively utilize the space within the stacked body 61. Tanks such as a liquid separator 18, 118 and a liquid receiver 24, 124 are housed within this waste heat exchanger 45.

Further, a piping unit 65 composed of the first piping 12° 112 and the like is arranged at the lower part of the laminate 61. That is, these tanks and piping units 65 are assembled into a stacked body 6.
1, the space within the stacked body 61 is also effectively utilized. Furthermore, in this case, the waste heat exchanger 45 prevents the air that has passed through the outdoor heat exchanger 10.110 from directly hitting the tanks, so that these tanks are not affected by heat. so that they are protected.

Moreover, in the above case, each outdoor heat exchanger 10.110 is divided into three parts, upper and lower. That is, the outdoor heat exchanger 10 is composed of an upper divided body 10a, a middle divided body iob, and a lower divided body 10c, and the outdoor heat exchanger 110 is also composed of an upper divided body 110a, a middle divided body 110b, and a lower divided body 110c. has been done. These refrigerant circulation circuits 3.103 are arranged vertically at different angles.

Therefore, even if the passing wind speed is high in a portion close to the fan 15.15 and slow in a portion far from the fan 15.15, heat exchange by the outdoor heat exchangers 10.110 of each refrigerant circulation circuit 3, 103 is performed evenly. will be exposed.

Further, in the above case, the radiator 42 is located at the top of the stacked body 61. Therefore, the hot air that has passed through this radiator 42 and has become high temperature is transferred to the container 1 and the second refrigerant circulation circuit 3.
．． 103 is prevented from having a thermal effect.

Additionally, reference numeral 66 denotes an electrical component storage box, which is provided on the upper surface of the case 53 so as not to be heated by the engine 1, thereby protecting the electrical components.

Although the above is based on the illustrated example, both indoor and outdoor heat exchangers 10.
In short, the arrangement of the divided bodies 110 is such that both indoor and outdoor heat exchangers 10
．． It is only necessary to distribute the cooling air to the 110 as evenly as possible, and in addition to the above, these divided bodies can be divided into the upper divided body 10a, the upper divided body 110a, the middle divided body 110b, and the middle divided body in order from the top. Both refrigerant circulation circuits 3.103 may be arranged vertically at different angles so that the body lOb, the lower divided body 10c, and the lower divided body 110c are formed.Also, the above-mentioned division is not limited to three. , there may be two or four or more).

Furthermore, the number of refrigerant circulation circuits may be three or more. In this case, for example, the number of refrigerant circulation circuits is three, and the outdoor heat exchanger 10.110 of each system is divided into two upper and lower parts. If these are the upper and lower divided bodies of the first to third systems, the arrangement will be sequentially from the top as the upper divided bodies of the first to third systems, and the lower divided bodies of the first to third systems. Alternatively, from the top, the upper divided bodies of the first to third systems and the lower divided bodies of the third to first systems may be arranged.

(Effects of the Invention) According to the present invention, the radiator and the outdoor heat exchanger are stacked vertically to form the stacked body in a U-shape in plan view, a fan is provided on the top, and the fan is activated. Since the outdoor unit is configured to exhaust the air inside the laminate, when the fan is activated, the air inside the laminate is exhausted and the outside air sufficiently passes through the radiator and outdoor heat exchanger. , heat exchange with the outside air is sufficiently performed in each of these.

In addition, as mentioned above, since the fan is provided at the top of the laminate and the components of the refrigerant circulation circuit are housed within the laminate, the outside surface and internal space of this outdoor unit are effectively utilized. , the outdoor unit can be made smaller accordingly.

In the above configuration, if multiple refrigerant circulation circuits are provided, the outdoor heat exchanger of each refrigerant circulation circuit is divided into upper and lower parts, and these divided bodies are arranged in different upper and lower parts in each system, Even if the passing wind speed is high in a portion close to the fan and slow in a portion far from the fan, heat exchange by the outdoor heat exchangers of each refrigerant circulation circuit is performed evenly.

In addition, in the above configuration, if the radiator is placed at the top and the refrigerant piping unit of the refrigerant circulation circuit is placed at the bottom of the stack, the hot air generated when the radiator is forcibly cooled by the fan will heat the respective refrigerant circulation circuit. influence is prevented.

Furthermore, in the above configuration, when a waste heat exchanger is provided that transmits the temperature of the engine cooling water to the refrigerant in the refrigerant circulation circuit, the waste heat exchanger is formed into an annular shape in a plan view, and the If the waste heat exchanger is placed at the bottom and the tanks such as the liquid separator that make up the refrigerant circulation circuit are housed within this waste heat exchanger, the waste heat exchanger will also be housed within this stacked body, making the outdoor unit more compact. In addition, in this case, in order to prevent the air that has passed through the outdoor heat exchanger from hitting the tanks, the waste heat exchanger is used to prevent the air that has passed through the outdoor heat exchanger from hitting the tanks. Reasonably protected from the thermal effects of the air.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is an overall side view, a partial partial view, FIG. 2 is an overall diagram, and FIG. 3 is a plan sectional view. ■... Engine, 3... First refrigerant circulation circuit, 10.11
0...Outdoor heat exchanger, 15...Fan, 18.118.
・Liquid separator (tanks), 24.124...Liquid receiver (tanks), 42...Radiator, 45.145...Waste heat exchanger, 51・Outdoor unit, 61...Laminated body, 65
...Piping unit, 103...Second refrigerant circulation circuit. -1'

Claims (1)

[Claims] 1. In an engine-driven heat pump device provided with a refrigerant circulation circuit driven by an engine, a radiator for cooling the engine and an outdoor heat exchanger for refrigerant included in the refrigerant circulation circuit are arranged vertically. The laminate is stacked to form a U-shape in plan view, a fan is provided on the top of the laminate for discharging air within the laminate, and components of the refrigerant circulation circuit are housed within the laminate. The outdoor unit 2 of the engine-driven heat pump device is provided with multiple refrigerant circulation circuits, the outdoor heat exchanger of each refrigerant circulation circuit is divided into a plurality of upper and lower parts, and these divided bodies are alternated vertically between each system. An outdoor unit of an engine-driven heat pump device according to claim 1, wherein the outdoor unit is arranged in an engine-driven heat pump device. 3. The outdoor unit of an engine-driven heat pump device according to claim 1 or 2, wherein the radiator is disposed at the top, while the refrigerant piping unit of the refrigerant circulation circuit is disposed at the lower part of the stacked body. 4. A waste heat exchanger is provided that transfers the temperature of the engine cooling water to the refrigerant in the refrigerant circulation circuit. 4. The outdoor unit of an engine-driven heat pump device according to claim 1, wherein tanks such as a liquid separator constituting a refrigerant circulation circuit are housed in the heat exchanger.