JPS5829796Y2 - Outdoor unit of air-cooled heat pump air conditioner - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air-cooled heat pump type air conditioner, and relates to an improvement of a heat sensitive part for defrosting command of a heat exchanger of an outdoor unit thereof.

First, the conventional technology of an outdoor unit of an air-cooled heat pump type air conditioner will be explained based on FIG. 1.2.

In Figure 1.2, 1 is an outdoor heat exchanger with many fins 2.
This is a cross-fin heat exchanger formed by passing through heat transfer tubes 3 and fixing them with side plates 4.

5 indicates a blower.

A pressure reducing valve 6 is connected to the heat exchanger 1 through a distribution pipe 7.

8 is a defrosting control device, and 9 is a heat sensitive part of the defrosting control device.

In the case of FIG. 1, the heat sensitive part 9 is attached to the distribution pipe 7 between the pressure reducing valve 6 and the heat exchanger 1, and in FIG. It is installed on.

Although not shown, there is also an example in which the heat sensitive section 9 is inserted between the fins 2 of the heat exchanger.

In the air-cooled heat pump type air conditioner, when performing winter heating operation, the heat exchanger 1 of the outdoor unit acts as an evaporator, causing frost to form on the fins 2 of the heat exchanger 1.

The heat sensitive part 9 of the defrosting control device senses the temperature of its mounting part,
This command issues a defrost command at a set temperature.

If the heat-sensitive part 9 is installed in a position away from the frosted part as described above, there may be a certain amount of time delay in the time when defrosting is required, or even worse, there may be no defrosting at all even though there is frost. may not be carried out.

For this reason, to prevent this, some devices raise the command temperature (set temperature) so that it is detected sooner.
This, on the other hand, creates an inconvenient situation in which defrosting is performed even though there is no frost.

This invention is intended to solve the above-mentioned problems, and aims to accurately detect frost formation on the heat exchanger and defrost it.

In this invention, even if a part of the heat exchanger is provided, a wind shielding means is installed to block the influence of wind from outside air so that frosting progresses quickly, the temperature decreases quickly, and heat exchange decreases. A heat-sensitive means is attached to that part.

Next, an embodiment of the present invention will be explained with reference to FIG.

In FIG. 3, parts that are the same as or equivalent to those in FIGS. 1 and 2 are indicated by the same reference numerals, and explanations of their constituent functions will be omitted.

In FIG. 3, the outdoor heat exchanger 1 has a part with fins and a part without fins, and the part without fins has an outside air wind blocking pipe 10 that blocks the influence of wind from the outside air, that is, a wind blocking means. It is arranged.

The heat-sensitive part 11 of the defrosting control device is placed inside the wind-shielded area.
has been inserted.

According to the present invention, a part of the cross-fin heat exchanger is kept in a windless state by the wind shielding means, so that frost formation progresses quickly and the temperature drops quickly, so frost formation is detected in a timely manner and the defrost command is issued. Served accurately.

Furthermore, since defrosting is performed at a reasonable command temperature, wasteful defrosting (defrosting without frost) is eliminated, and effective heating can be carried out, which is highly effective.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views of conventional outdoor units;
The figure shows a sectional view of the outdoor unit of the present invention. 1... Cross fin heat exchanger (outdoor heat exchanger), 2... Fin, 3... Heat transfer tube, 4
...Side plate, 8...Defrost control equipment, 9.
...Heat-sensing section, 10... Outside air blocking pipe (wind shielding means), 11... Heat-sensing section.

Claims (1)

[Scope of utility model registration request] In an outdoor unit of an air-cooled heat pump type air conditioner comprising a cross-fin heat exchanger formed by passing heat transfer tubes through a large number of fins, a blower, and other refrigeration cycle equipment, a part of the cross-fin heat exchanger An outdoor unit of an air-cooled heat pump type air conditioner, characterized in that a wind shielding means for blocking the influence of outside air is disposed at the wind shielding position, and a defrosting command heat-sensitive means is disposed at the wind shielding position.