JPH01200131A - Engine heat pump device - Google Patents

Abstract

PURPOSE:To permit the arrangement of an outdoor air-conditioning device which is neighbored to a wall surface, by a method wherein a radiator for an engine is provided in parallel to an outdoor heat exchanger at the upper position of the inside of the same while an outdoor heat exchanging fan is constituted so as to rotate about a vertical shaft at the upper surface of an outdoor heat exchanging chamber. CONSTITUTION:The lower stage of an outdoor air-conditioning device A is utilized for an engine room 10 while an engine 2, compressors 1L, 1R, a four- way valve, a waste heat retriever and the like are arranged in the engine room 10. The upper half of the air-conditioning device A is utilized for an outdoor heat exchanging chamber 11 and outdoor heat exchangers 17, 17, divided into front and rear pieces, are arranged in the outdoor heat exchanging chamber 11. Radiators 3, 3 for the engine are arranged at the inside of the outdoor heat exchangers 17. Atmosphere, sucked through the outdoor heat exchangers 17, 17 and the radiators 3, 3, is discharged out of outdoor heat exchanging fans 4, 4 through a space between the radiators 3, 3, therefore, the area of installation of the outdoor air-conditioning device A may be narrowed and the cooling efficiency of the radiators 3 for the engine may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an engine heat pump device that performs both cooling and heating functions in large-capacity spaces such as buildings and stores.

(b) Prior Art Conventionally, it has been known that the outdoor air conditioner A is constructed as a whole by arranging the engine room in the lower part and providing the outdoor heating steel tube cavity 11 in the upper part.

For example, Japanese Patent Application Laid-Open No. 62-80463.

(c) Problems to be solved by the invention However, in the conventional technology, the outdoor heat exchange fan that blows outside air to the outdoor heat exchanger in the outdoor heat steel pipe is arranged on the side of the entire outdoor air conditioner. Therefore, there was a problem in that the outdoor air conditioner could not be placed in close contact with a wall.

In the present invention, the outdoor heat exchange fan for the outdoor heat exchanger is arranged so as to discharge air toward the top of the outdoor air conditioner so that the outdoor air conditioner can be installed in as small a space as possible. This is what I did.

By doing so, air is no longer blown out to the side of the outdoor air conditioner, and the outdoor air conditioner can be placed closer to the wall surface.

However, if the outdoor heat exchange fan 4° is configured to discharge from the top surface of the outdoor air conditioner A, the air flow passing through the outdoor heat exchanger placed inside the outdoor heat steel tube room will be biased, and the The outside air tends to pass through only the upper part of the heat exchanger.

In order to improve this point, in the present invention, in order to prevent the outside air from concentrating on the upper part of the outdoor heat exchanger 17,
An engine radiator is placed as a resistor.

(d) Means for Solving the Problems The object and structure of the present invention are as described above. Next, the structure for achieving the object will be explained.

An outdoor heat exchanger 17 is arranged inside the outdoor heat exchange room 11 placed in the upper part of the engine room 10, and the outdoor heat exchanger 17
In an engine heat pump device in which an outdoor heat exchange fan 4 is provided above the outdoor heat exchanger 17, an engine radiator 3 is arranged in parallel inside and above the outdoor heat exchanger 17.

(E) Embodiment The object and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

Fig. 1 is a flowchart showing the flow of refrigerant in the engine heat pump device of the present invention, and Fig. 2 shows the engine room 1 at the bottom.
Fig. 3 is a side view of an outdoor air conditioner in which the outdoor heat exchange chamber 11 is arranged and the outdoor heat exchange chamber 11 is arranged at the top, Fig. 4 is a side view of Fig. 3, and Fig. 5 is a front view of the outdoor heat exchange chamber 11. is a plan view of FIG. 3;

Referring to FIG. 1, the flow of refrigerant and heating/cooling effects in the engine/heat pump device will be explained.

Two compressors IL and IR driven by the engine 2 are arranged. Two compressors 1 are arranged in the case of a large-sized engine/heat pump system, but one compressor 1 may be used in the case of a small-sized system.

Then, depending on whether the refrigerant compressed in the compressor IL-IR and becomes high temperature and high pressure is sent from the indoor heat exchanger 16 side by the four-way valve 8 or from the outdoor heat exchanger 17, the heating cycle or the cooling cycle is performed. It is switched to .

In FIG. 1, the flow of refrigerant indicated by black arrows is for heating, and the flow of refrigerant indicated by white arrows is for cooling.

First, in the case of air conditioning, the refrigerant is vaporized by the indoor heat exchanger 16 and after sending cold air is compressed from the four-way valve 8.
It returns to R and becomes a high-temperature, high-pressure gas again.

Next, the high-temperature, high-pressure gas of the refrigerant is discharged from the compressed alL/IR, reaches the outdoor heat exchanger 17 through the four-way valve 8, and is cooled and liquefied by the outside air blown by the outdoor heat exchange fan 4.

Next, the liquefied refrigerant is expanded by the expansion valve 18 and reaches the indoor heat exchanger 16, where it absorbs heat from the indoor air and evaporates. At this time, the indoor air is cooled by the heat of evaporation,
This turns into cold air and produces a cooling effect.

The evaporated refrigerant gas returns to the compressors IL and IR and repeats the same cycle.

Next, in the case of heating, the refrigerant is circulated in the opposite direction to that in the case of cooling.

First, the refrigerant vaporized in the outdoor heat exchanger 17 passes through the switched four-way valve 8, returns to the compressors IL and IR, and becomes a high-temperature, high-pressure gas again.

The high temperature and high pressure gas reaches the indoor heat exchanger 16 from the four-way valve 8 and is liquefied. At this time, the indoor air is heated by the heat of condensation and turned into warm air by the indoor heat exchange fan 9, thereby heating the room.

The liquefied refrigerant expands in the fat expansion valve 18 and then takes heat from the outside air in the outdoor heat exchanger 17 and evaporates.

On the other hand, the refrigerant that passes through the solenoid valve and enters the exhaust heat recovery device 15 absorbs heat from the cooling water of the engine 2 and radiates it, further improving the heating effect.

The evaporated refrigerant gas returns to the compressor IL-IR and repeats the same cycle.

The cooling water for the engine 2 is sent to the engine radiator 3 by the cooling water pump P, and is cooled by the air blown by the outdoor heat exchange fan 4 against the engine radiator 3.

The outdoor heat exchange fan 4 blows air both to the outdoor heat exchange fan 4 and to the outdoor heat exchanger 17.

Next, referring to FIG. 2, the overall configuration of the outdoor air conditioner A will be explained.

The lower stage to the outdoor air conditioner is configured in the engine room 10,
Inside the engine room 10, the engine 2 has compressors IL and IR.
In addition, a four-way valve 8, an exhaust heat recovery device 15, etc. are arranged.

The upper half of the outdoor air conditioner A is configured as an outdoor heat exchange chamber 11, and inside the outdoor heat exchange chamber 11, an outdoor heat exchanger F-17 divided into two pieces on the front and back sides is arranged. has been done.

A slight gap is formed inside the outdoor heat exchanger 17, and the engine radiator 3 is also divided into two parts, front and rear.
・3 is placed.

A space is formed between the engine radiators 3,
The outside air sucked through the outdoor heat exchanger 17 and the engine radiator 3 is configured to pass through the space and reach the outdoor heat exchange fan 4.

The outdoor heat exchange fans 4 are also configured in two sets on the left and right sides.

In the conventional technology, the outdoor heat exchange fan 4 was placed on the side of the outdoor heat exchange room 11, so that the air discharged from the outdoor heat exchange fan 4 was not blocked by the wall.
However, in the case of the present invention, the outdoor heat exchange fans 4 are provided on the left and right sides of the upper part of the outdoor heat exchange room 11, and a sufficient space has to be provided between the outdoor heat exchange room and the wall. 11
Since only an inlet for sucking air is provided from the side of the inlet, there is no need to provide a large space between the inlet and the wall as in the case of an outlet.

Furthermore, when the outdoor heat exchange fan 4 is provided on the top surface and the outdoor heat exchanger 17 is provided on the side surface, the air inevitably passes through only the top of the outdoor heat exchanger 17 that is closer to the outdoor heat exchange fan 4. This is due to the problem that the heat exchanger 17 reaches the outdoor heat exchanger fan 4, and the heat exchange effect of the lower part of the outdoor heat exchanger 17 is reduced.

In order to solve this problem, the present invention is designed to overcome the resistance of outside air passing through the outdoor heat exchanger 17 by increasing the resistance from the upper part of the outdoor heat exchanger 17 to the middle part of the outdoor heat exchanger 17 as shown in FIGS. 3 to 5. The engine radiator 3 is arranged so that.

As a result, as shown by the arrow in FIG. The resistance becomes large, making it difficult for the air to pass through this part, and the air also passes through the part of the outdoor heat exchanger 17 that overlaps with the lower engine radiator 3.

The magnitude of this passing air is illustrated by arrows in FIG.

Furthermore, as shown in FIG. 4, in the vertical relationship, the engine radiator 3 overlaps in the upper part, but as shown in FIG. The positional relationship between the two is shifted.

Due to the relationship between this and the outdoor heat exchange fan 4 that rotates around a vertical axis, there are areas where the suction force is strong and areas where the suction force is weak in a plan view, so this bias is also corrected.

(F) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

First, in the outdoor air conditioner A that constitutes the engine heat pump device, a suction type outdoor heat exchange fan that rotates around a horizontal axis was conventionally placed on the side of the outdoor heat exchange chamber 11. In order to eliminate the shield on the ventilation side of the outdoor heat exchange fan 4 and improve the ventilation efficiency, it was necessary to provide a large gap between the outdoor heat exchange fan 4 and the wall.

On the other hand, in the case of the present invention, the outdoor heat exchange fan 4 is arranged on the top surface of the outdoor heat exchange chamber 11 so as to rotate around a vertical axis, so that there is a gap between the top surface of the outdoor heat exchange chamber 11 and the ceiling. All that is needed is a space, and since the air suction port is from the side of the outdoor heat exchange room 11, there is no need for a large space like in the case of discharge, and the installation area of the outdoor air conditioner A can be reduced. It is something that

Second, when the outdoor heat exchange fan 4 is installed above,
There was a problem in that the air was sucked only from the upper part of the vertically arranged outdoor heat exchanger 17, and the air did not pass through the lower part, resulting in poor heat exchange efficiency.

On the other hand, in the case of the present invention, the engine radiator 3 is disposed at the upper part of the outdoor heat exchanger 17 so that the suction air does not pass only from the upper part of the outdoor heat exchanger 17. It was possible to pass suction air approximately evenly.

Thirdly, in the conventional case, the engine radiator 3 is placed inside the lower engine room, but in the case of the present invention, it is placed inside the upper outdoor heat exchange room 11. This improves the cooling efficiency of the engine radiator 3.

This also has the effect of making the radiator smaller.

[Brief explanation of the drawing]

Fig. 1 is a flowchart showing the flow of refrigerant in the engine heat pump device of the present invention, and Fig. 2 shows the engine room 1 at the bottom.
3 and a front view of the outdoor heat exchange chamber 11. is a plan view of FIG. 3; A...Outdoor air conditioner IL-IR...Compressor 2...Engine 3...Engine radiator 4...Outdoor heat exchange fan 10...Engine room 11...Outdoor Heat exchange room 16...Indoor heat exchange tjl! Device 17: Outdoor heat exchanger applicant Yanmar Diesel Co., Ltd. agent Patent attorney Hisashi Yano

Claims (1)

[Claims] In the outdoor heat exchange room 11 placed on the upper part of the engine room 10,
In an engine heat pump device in which an outdoor heat exchanger 17 is arranged and an outdoor heat exchange fan 4 is further provided above the outdoor heat exchanger 17, an engine radiator 3 is installed inside and above the outdoor heat exchanger 17. An engine heat pump device characterized by having the following installed in parallel.