JPH0442659Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to an outdoor unit of an engine-driven heat pump that uses an engine as its driving source and performs air conditioning, heating, and hot water supply.

(b) Prior Art As disclosed in Japanese Patent Laid-Open No. 59-1968, the outdoor unit of a conventional engine-driven heat pump is installed above the engine room housing an engine and a compressor driven by the engine. In many cases, a heat exchanger chamber containing a blower and an outdoor heat exchanger is used. In addition, a sound absorbing material is attached to the inner wall of the engine room to prevent engine operating noise from leaking outside.

(c) Problems to be solved by the invention In the outdoor unit of the engine-driven heat pump described above, the engine compartment is sound-insulated with a heat-insulating sound-absorbing material, so the temperature of the engine compartment increases due to heat radiation from the engine, causing There were concerns that it would have a negative effect on the engine. Therefore, as disclosed in Japanese Utility Model Application Publication No. 58-172775, it has been proposed to install a heat exchanger for cooling the engine compartment in the engine compartment, or to install a ventilation device in the engine compartment. However, the disadvantages of this type of system were that the refrigerating capacity during cooling was reduced and the structure was complicated.

This invention was made in view of the above-mentioned facts, and the purpose is to prevent the temperature rise in the engine compartment without reducing the refrigerating capacity or complicating the structure.

(d) Means for solving the problem This invention provides a heat exchanger room that houses a blower and an outdoor heat exchanger above the engine room that houses the engine and the compressor driven by the engine. This is an improvement to the installed outdoor unit of the engine-driven heat pump. In this invention, the engine compartment is partitioned by a metal partition structure, and a thermally conductive sound absorbing material is attached to the inner surface of the partition structure.

(e) Effect With this configuration, heat in the engine compartment is transmitted to the partition structure through the thermally conductive sound absorbing material and released from the partition structure to the atmosphere, thereby preventing a rise in temperature in the engine compartment. . Since the thermally conductive sound-absorbing material is used to prevent a temperature rise in the engine compartment, it is possible to insulate the engine compartment from sound without reducing the refrigeration capacity or complicating the structure. Furthermore, if the drain pan of the outdoor heat exchanger is also used as the partition structure, the drain pan will be warmed by engine exhaust heat, so the drain water collected in the drain pan will not freeze during the winter.

(f) Examples Hereinafter, examples of this invention shown in the drawings will be described.

In FIG. 1, the outdoor unit of the engine-driven heat pump has an engine room 3 in the lower part of which houses an engine 1 and a compressor 2 driven by the engine 1, and above the engine room 3 there is a blower 4 and an air blower 4 in the room. A heat exchanger chamber 6 in which an outer heat exchanger 5 is housed is provided. The heat exchanger chamber 6 is provided with an air inlet 7 on the side wall and an air outlet 8 on the upper wall. The outdoor heat exchanger 5 and the compressor 2 constitute a part of the refrigeration cycle. The engine compartment 3 is divided by a drain pan 9 as a metal partition structure, exterior panels 10, 10, and a bottom plate 11, and the inner wall of the engine compartment 3 is made of thermally conductive sound absorbing material 12, 12, 12 such as aluminum wool. is attached. As shown in FIGS. 2 to 4, these thermally conductive sound absorbing materials 12 are attached to the partition structure by adhesive or using attachment fittings 13 or attachment plates 14.

When the engine 1 operates, the compressor 2 is driven and refrigerant flows into the refrigeration cycle. Furthermore, by operating the blower 4, outdoor air is sucked through the air suction port 7, and the outdoor air that has passed through the outdoor heat exchanger 5 is discharged upward from the air outlet 8. Further, drain water generated by defrosting the outdoor heat exchanger 5 and rainwater that has entered the heat exchanger chamber 6 are collected in the drain pan 9 and discharged from the drain pan 9 to the outside of the heat exchanger chamber 6.

According to this embodiment, since the thermally conductive sound absorbing material 12 is attached to the drain pan 9 and the exterior panels 10 and 11, the heat in the engine compartment 3 is transferred to the drain pan 9 and the exterior panels 10 and 11 through the thermally conductive sound absorbing material 12. 10 and radiate heat from these to the atmosphere,
A temperature rise in the engine compartment 3 can be prevented. Furthermore, since the drain pan 9 is heated, there is no need to worry about the drain water in the drain pan 9 freezing in winter. Furthermore, unlike conventional refrigeration cycles that are equipped with a heat exchanger for cooling or a ventilation system in the engine compartment, the refrigeration capacity does not decrease or the structure becomes complicated, resulting in good operating efficiency. It is possible to insulate the engine compartment 3 from noise while maintaining the engine temperature and constructing the engine compartment at low cost.

(g) Effects of the invention This invention is structured as described above, so
Using thermally conductive sound-absorbing materials, heat in the engine compartment can be transferred to the engine compartment partition structure and dissipated to the atmosphere, without adversely affecting the refrigeration capacity or complicating the structure. It is useful because it can prevent temperature rise. Furthermore, as in the above embodiment, by making the drain pan of the outdoor heat exchanger also serve as the partition structure, the drain pan can be heated by engine exhaust heat and the drain water in the drain pan can be prevented from freezing in the winter. You can also do it.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an outdoor unit of an engine-driven heat pump showing an embodiment of this invention, and Figs. 2 to 4 are sectional views illustrating how the thermally conductive sound absorbing material is attached to the partition structure. It is. 1...Engine, 2...Compressor, 3...Engine compartment, 4...Blower, 5...Outdoor heat exchanger, 6
... Heat exchanger room, 9 ... Drain pan (partition structure), 10 ... Exterior panel (partition structure), 12
...Thermally conductive sound absorbing material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A heat exchanger room containing a blower and an outdoor heat exchanger is arranged above the engine room containing an engine and a compressor driven by the engine. An outdoor unit for an engine-driven heat pump, characterized in that the engine compartment is partitioned by a metal partition structure, and a thermally conductive sound-absorbing material is attached to the inner surface of the partition structure. . (2) The outdoor unit of an engine-driven heat pump according to claim 1, wherein the partition structure in the upper part of the engine compartment is a drain pan.