JPS6240268Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an outdoor unit of a heat pump type air conditioner having a plate fin type heat exchanger and a plurality of blowers.

Nowadays, there is a demand for outdoor units to be thinner with a smaller installation footprint, and they are equipped with a plate-fin type heat exchanger that stands long in the vertical direction and multiple blowers that are placed opposite it. A slim outdoor unit with a built-in unit has been proposed. However, in this slim unit structure, since the heat exchanger is vertically shaped, it takes time for the dew water adhering to the heat exchanger to descend during heating and heating defrosting, which reduces the efficiency of heat exchange with outside air. There was a risk that the lower part of the heat exchanger would eventually freeze.

In view of these points, the purpose of this proposal is to improve heat exchange efficiency and prevent freezing by selecting the air volume of the blower. In order to achieve this purpose, this proposal includes a plate-fin type heat exchanger that has a large number of vertical fins and acts as an evaporator during heating operation, and a blower device that is disposed above and below the heat exchanger. This blower device is composed of an upper blower and a lower blower having a larger air volume than the blower.

The embodiment of the present invention will be explained below based on FIGS. 1 to 3. 1 is a machine room housing a compressor 2, a liquid receiver 3, and a gas-liquid separator 4, and 5 is a location approximately in the center of this machine room. A ventilation guiding casing extends laterally from the casing, 6a and 6b are nozzles formed at upper and lower positions of this casing, and 7a and 7b are plate fin type heat sinks facing into the nozzles and having a large number of vertical fins 8. This is an axial blower disposed facing the exchanger 9, and these nozzles 6a, 6b and blowers 7a, 7
A blower device 10 is constructed from b. The lower blower 7b is set to have a higher rotational speed than the upper blower 7a so that its air volume is greater.

11a is a front exhaust port provided on the leeward side of the blower 10, 11b is a right side exhaust port provided fully vertically on the right side of the device, and 11c is a right side exhaust port provided on the upper left side of the device, which is located in the machine room 1. The left side exhaust port 11d is a top exhaust port provided on the top surface of the device.

Therefore, the outside air flow that has been heat exchanged with the upper half 9a of the heat exchanger 9 is transferred to the upper half of the front exhaust port 11a, the upper half of the right side exhaust port 11b, the left side exhaust port 11c, and the upper surface of the upper blower 7a. The outside air flow that is dispersed and discharged from the exhaust port 11d and heat exchanged with the lower half 9b of the heat exchanger 9 is sent to the front exhaust port 11a by the lower blower 7b.
The air is distributed and discharged from the lower half and the lower half of the right side exhaust port 11c, and the lower blower 7b, which has a smaller exhaust port area than the upper blower 7a, is supplemented by the air volume increasing means as described above.

Moreover, when dew adheres to the entire heat exchanger 9 acting as an evaporator during heating and descends along the vertical fins 8, the lower half part 9b of the heat exchanger 9 is The attached dew water and the dew water that has descended from the upper half are scattered, the descending speed of the dew is increased, and dew water is prevented from accumulating in the lower half 9b of the heat exchanger 9. This is also the case during heating and defrosting when the heat exchanger 9 acts as a condenser through a reverse cycle, and the dew water in the lower half 9b of the heat exchanger 9 returns to heating operation while remaining stagnant and freezes. It is prevented.

As described above, the present invention has a simple configuration in which the lower blower has a higher air volume than the upper blower, and can reliably prevent dew water from accumulating in the outdoor heat exchanger during heating operation.
It is possible to improve heat exchange efficiency and prevent freezing.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the inside of the outdoor unit, FIG. 2 is a sectional view taken at -' in FIG. 1, and FIG. 3 is a sectional view taken at -' in FIG. 1. . 8... Vertical fin, 7a... Upper blower, 7b...
...Lower side blower, 9...Plate fin type heat exchanger, 10...Blower device.

Claims (1)

[Scope of utility model registration request] It is equipped with a plate fin type heat exchanger that has a large number of vertical fins and acts as an evaporator during heating operation, and a blower device that faces the heat exchanger and is disposed vertically. An outdoor unit of a heat pump air conditioner, which is composed of a blower and a lower blower with a larger air volume than the blower.