JP4243665B2 - Engine heat pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine heat pump, and more particularly to a configuration of an outdoor unit equipped with an engine and an outdoor heat exchanger.
[0002]
[Prior art]
An engine heat pump drives a compressor with an engine and circulates a refrigerant to indoor and outdoor heat exchangers. Generally, an engine, a compressor, an outdoor heat exchanger, and a main refrigerant circuit are outdoor units. And the outdoor unit and the indoor heat exchanger are connected by piping.
[0003]
In this case, multiple types of outdoor units with different operating ranges are prepared so that the outdoor unit can accommodate the magnitude of the load, such as the number of indoor units that contain indoor heat exchangers. Select a model and install it.
[0004]
And, since the capacity of the heat exchanger of the outdoor unit varies with the operation range, conventionally, the outdoor heat exchanger with a different capacity is replaced for each operation range to cope with such a change of the operation range. Like to do.
[0005]
On the other hand, the outdoor unit needs a control device for switching the operation state of the entire heat pump and controlling each part, and this control device is housed in one box and stored in the outdoor unit.
[0006]
[Problems to be solved by the invention]
In the above-mentioned conventional outdoor unit, since different heat exchangers with different capacities were prepared for different operating ranges, the types of heat exchangers increased, and the number of parts increased and the accompanying parts management became complicated. There was a drawback of high cost.
[0007]
Also, the control box is the same, and a control box is required for each different model. For this reason, there is a similar disadvantage that the number of parts increases.
[0008]
In view of such conventional drawbacks, the present invention reduces the number of parts by allowing an outdoor heat exchanger and a control box equipped with an outdoor unit to be used in common for each operation range. Is.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention of claim 1 of this application, in the case where there are a plurality of types of outdoor units having different operation ranges, the heat exchange unit case and the heat exchange fan are shared to share the heat exchange. The height and width direction dimensions of the heat exchangers are made common, and only the number of refrigerant passage paths in the depth direction of the heat exchanger is increased or decreased according to the load of each model.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a product lineup of various outdoor units from a small one having the smallest operating range, that is, a heat exchange capacity to a largest one having the largest heat exchange capacity. In the figure, (1) and (1) are small outdoor units having the smallest heat exchange capacity. The box-shaped engine unit (2) is located on the lower side and the box-shaped heat exchange unit (3) is located on the upper side. Are stacked one above the other to form an integrated package.
[0012]
In this small outdoor unit (1), on the front surface of the heat exchange unit (3), the heat exchange fan (4) is placed vertically on the front wall so that the rotation axis is horizontal and in the depth direction. Installed horizontally. In addition, only one heat exchange fan (4) (4) is provided. One of these small outdoor units (1) and (1) has an operating range of 5 HP, and the other has a 7.5 HP range, and each is shown numerically on the right shoulder.
[0013]
Similarly, in FIG. 1, (5), (5), etc. are medium-sized outdoor units having an operating range of 8 HP to 13 HP, and a box-type engine unit (6) is installed on the lower side as described above. Similarly, a box-shaped heat exchange unit (7) is arranged on the upper side, and a box-shaped package is formed by stacking them up and down. In these medium-sized outdoor units (5), two heat exchange fans (8) and (8) are arranged on the top surface of the heat exchange unit (7) in the width direction as viewed from the front, and their rotation shafts. Is attached vertically.
[0014]
On the other hand, (9) and (9) show a large outdoor unit having a larger heat exchange capacity and an operating range of 20 HP as in the case of 16 HP. Three heat exchange fans (8) installed on the top surface are arranged side by side in the width direction.
[0015]
2 to 4 are sectional views showing the internal structure of the small outdoor unit (1). As described above, the heat exchange fan (4) is mounted on the front wall of the heat exchange unit (3) so as to face the heat exchange unit (3). A heat exchanger (11) is attached along the rear wall of the heat exchange unit (3). The outside air for heat exchange is sucked from the back side through the heat exchanger (11) by the heat exchange fan (4) and then discharged to the front side.
[0016]
The heat exchanger (11), like this type of outdoor heat exchanger, penetrates a large number of plate-like heat exchange fins (12), the fins (12), and U at the end in the width direction. The refrigerant passage pipes (13) curved in a letter shape are formed as two rows in the depth direction as shown in FIG. 4 in the embodiment shown in FIG. The heat exchange capacity is secured.
[0017]
The heat exchange unit (3) shown in FIGS. 2 to 4 is for a small outdoor unit (1) (1) with a small heat exchange capacity of 5 HP, but for the larger 7.5 HP. When used, the pipes (13) are arranged in three rows in the depth direction, thereby ensuring the heat exchange capacity necessary for 7.5 HP. That is, this heat exchange unit (3) uses the same case for the package (14), heat exchange fan (3), etc. for 5HP and 7.5HP. By changing the number of rows of pipes (13) from 2 to 3 in the depth direction, it is possible to cope with such a range change by changing the heat exchanger (11) while sharing all other parts. I am doing so.
[0018]
FIG. 5 is a perspective view showing the internal structure of the engine unit (6) in the medium and large outdoor units (5) and (9). The space in the engine unit (6) is divided into left and right by a partition plate (20) raised from the bottom wall (21) of the case, the engine room (22) on the left side and the refrigerant circuit chamber (23 on the right side) ). An engine (24) is installed in the engine room (22), and a compressor (25) is installed beside the engine (24) on the side opposite to the refrigerant circuit chamber (23).
[0019]
The engine (24) is a horizontal crankshaft engine in which the crankshaft (19) extends horizontally in the width direction when viewed from the front, and the piston (18) reciprocates vertically. Medium size machine (5) Engines (24) with the same number of cylinders are used in common among models, but large outdoor units (10) (10) are larger engines (24) with more cylinders than that. Are commonly used. In this case, the length of the engine (24) in the width direction when viewed from the front is increased corresponding to the increase in the number of cylinders.
[0020]
In the refrigerant circuit chamber (23), a control box (27) for controlling the refrigerant circuit is provided on the front side portion of the refrigerant circuit chamber (23), and a lubricating oil auxiliary tank (28) is sandwiched on the back side of the refrigerant circuit. (29) is installed together.
[0021]
In the above, in the medium-sized and large-sized outdoor units (5) and (9), the arrangement structure of the engine room (22) and the refrigerant circuit chamber (23) in the engine unit (6) is the same, and the engine room The arrangement structure of the compressor (25) and the engine (24) in (22) is also common.
[0022]
As described above, the number of cylinders of the engine (24) increases in the large size, but this increase in the number of cylinders only changes the size in the width direction in the engine room (22), the height direction Will not change. In other words, the engine unit (6) is the same for all medium-sized to large-sized ones, so that the control box (27) disposed in the refrigerant circuit chamber (23) has the same height. And the same thing can be used.
[0023]
In other words, the control circuit itself for the entire heat pump does not change whether it is large or small, and the same number of parts and wiring itself can be used. Therefore, the control box (27) is also used. It is possible to use the same one, but if the height of the engine unit (6) in which the control box (27) is arranged changes, the shape of the control box (27) must be changed accordingly. However, in this way, the same height can be used so that the same control box (27) can be used.
[0024]
【The invention's effect】
As described above, according to the present invention, when there are a plurality of types of outdoor units having different operation ranges, by changing only the number of refrigerant passage paths in the depth direction of the heat exchanger, Since all the common units are used, it is possible to cope with such changes in the operation range. Basically, all outdoor units can be used in common between them, and The cost for responding to the change can be greatly reduced, and since only the number of refrigerant passage paths is changed as such, it is possible to respond quickly to a change in range.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a lineup of outdoor units having different operation ranges.
FIG. 2 is a cross-sectional view of a heat exchange unit in a small type outdoor unit.
3 is a cross-sectional view taken along line AA in FIG.
4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is a perspective view showing a structure inside an engine unit in a medium-sized and large-sized outdoor unit.
FIG. 6 is an overall longitudinal sectional view showing the internal arrangement structure of the outdoor unit.
[Explanation of symbols]
(1) Small outdoor unit
(3) Heat exchange unit
(6) Engine unit
(7) Heat exchange unit
(11) Heat exchanger
(27) Control box

Claims (1)

In the case where plural kinds of outdoor units having different operating ranges are present, by sharing the case and the heat exchanging fan of the heat exchange unit, the height and width dimensions of the heat exchanger in common, the load for each model An engine heat pump characterized in that only the number of refrigerant passages in the depth direction of the heat exchanger is increased or decreased according to the size.

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