JPH0218453Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is an air heat exchanger for an engine-driven heat pump used as an air-conditioning device, a hot water supply device, etc. and a finch tube group capable of heating the atmosphere around the finch tube group.

In the air heat exchanger of such an engine-driven heat pump, due to the presence of the atmosphere heating finch tube group, water vapor in the air freezes on the finch tubes (frosting, icing) during heating operation in cold seasons such as winter. However, in conventional air heat exchangers of this type, the distribution of the atmosphere heating finch tube group in the vertical direction is uniform. As a result, the following drawbacks still existed.

That is, although frosting and icing on the upper finch tubes can be sufficiently suppressed, the melting water in the upper finch tubes drips onto the lower finch tubes and is likely to refreeze on the lower finch tubes. Once this occurs, the re-freezing progresses at an accelerated pace, and the lower finch tube group is covered with frost and ice.As a result, when operated continuously for a long time, the defrosting effect of the atmosphere heating finch tube group is fully demonstrated. There was a drawback that it would no longer be used.

An object of the present invention is to solve the above-mentioned drawbacks of the conventional technology by arranging a group of finch tubes for atmosphere heating.

The air heat exchanger for an engine-driven heat pump according to the present invention is characterized in that the atmosphere heating finch tube group is distributed in a state where it becomes denser toward the bottom.

That is, by increasing the distribution density of the atmosphere heating finch tubes toward the bottom, the amount of atmosphere heating increases toward the bottom. It is possible to apply sufficient heat to the melting water to prevent it from adhering to the lower finch tube group, or to evaporate the adhering water and prevent re-freezing in the lower finch tube group. By making simple structural modifications such as adjusting the upper and lower distribution density as described above, it is possible to expect a reliable and sufficient defrosting effect over the entire upper and lower regions, and to ensure that the desired heat exchange action is always carried out efficiently. Ivy.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in Fig. 1, a clutch 2 is connected to an engine 1.
The pressurized refrigerant in the refrigerant circulation circuit 4 of the compressor 3 linked via A first heat exchanger 7 that condenses the pressurized refrigerant and raises the temperature of the water, a second heat exchanger 8 that evaporates the condensed refrigerant, and the water in the water heating circulation circuit 6 and the engine. a first heat exchanger 9 for recovering engine exhaust heat that cools the engine 1 while exchanging heat with the cooling water to raise the temperature of the water;
A second engine exhaust heat recovery circuit that raises the temperature of the water in the water heating circulation circuit 6 by heat exchange with the engine exhaust gas.
A heat exchanger 10 is provided to configure a water heater using an engine-driven heat pump.

The second heat exchanger 8 is an air heat exchanger, and includes a group of finch tubes 8A for distributing refrigerant disposed at appropriate intervals in the vertical direction, and engine exhaust heat from the water heating circulation circuit 6. 1st and 2nd for collection
The finch tubes 8B... group are capable of heating the atmosphere of the finch tubes 8A... group with heated water supplied via a bypass passage 11 with a pump 11a connected in parallel to the heat exchanger groups 9 and 10. We are prepared.

The two finches 8A..., 8B... groups are:
Each of the fin fin tubes 8A, 8B, .

12 is an expansion valve, 13 is a valve that adjusts the amount of water supplied to the bypass passage 13a, 14 is a hot water outlet pipe with a faucet 14a, and 15 is a water supply pipe to the hot water storage tank 5.

Therefore, the atmosphere heating finch tube 8B
...Distribute the groups so that they become denser toward the bottom.

According to the configuration of the above embodiment, since the heating effect of the atmospheric heating finch tubes 8B is stronger in the lower part, the dripping water from above is not refrozen, and good heat exchange is performed throughout the finch tubes 8A. It can be done.

The present invention provides the finch tubes 8A..., 8B...
may be constructed from separate tubes.

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram of a water heater using a heat pump, and FIG. 2 is a cutaway perspective view of an air heat exchanger. 8A... Finch tube for refrigerant distribution, 8B...
Finch tube for atmosphere heating.

Claims (1)

[Scope of utility model registration request] Air heat exchange of an engine-driven heat pump equipped with a group of finch tubes 8A for refrigerant distribution arranged at appropriate intervals in the vertical direction and a group of finch tubes 8B capable of heating the atmosphere around the finch tubes 8A. An air heat exchanger for an engine-driven heat pump, characterized in that the atmosphere heating finch tubes 8B are distributed more densely toward the bottom.