阅读说明：本技术 空调机 (Air conditioner ) 是由 本条秀树 于 2018-10-12 设计创作，主要内容包括：本发明的目的在于提供能够抑制室内的湿度升高、且进行室内机内部的干燥的空调机。本发明的空调机具有：室外机；以及室内机,其具有室内热交换器以及减压装置。室内热交换器具有第1热交换部以及第2热交换部,减压装置连接于第1热交换部与第2热交换部之间。该空调机执行使得第1热交换部和第2热交换部作为蒸发器起作用的制冷运转或除湿运转、以及使得第1热交换部作为冷凝器起作用且使得第2热交换部作为蒸发器起作用的再热除湿运转。而且,对第2热交换部实施滑水化处理。根据本发明的空调机,即使为了使室内机内部干燥而执行使得第2室内热交换部作为蒸发器起作用的再热除湿运转,在实施了滑水化处理的第2室内热交换部产生的冷凝水也不会残留于第2室内热交换部,因此能够抑制室内的湿度的升高且进行室内机内部的干燥。(The invention aims to provide an air conditioner which can restrain the indoor humidity from increasing and can dry the indoor unit. The air conditioner of the invention comprises: an outdoor unit; and an indoor unit having an indoor heat exchanger and a pressure reducing device. The indoor heat exchanger has a1 st heat exchange unit and a2 nd heat exchange unit, and the pressure reducing device is connected between the 1 st heat exchange unit and the 2 nd heat exchange unit. The air conditioner performs a cooling operation or a dehumidifying operation in which the 1 st heat exchange unit and the 2 nd heat exchange unit function as evaporators, and a reheating dehumidifying operation in which the 1 st heat exchange unit functions as a condenser and the 2 nd heat exchange unit functions as an evaporator. Then, the 2 nd heat exchanger is subjected to a water-slipping treatment. According to the air conditioner of the present invention, even if the reheat dehumidification operation is performed in which the 2 nd indoor heat exchange unit functions as an evaporator in order to dry the inside of the indoor unit, the condensed water generated in the 2 nd indoor heat exchange unit subjected to the water-slipping treatment does not remain in the 2 nd indoor heat exchange unit, and therefore, the inside of the indoor unit can be dried while suppressing an increase in the indoor humidity.)

1. An air conditioner, comprising: an outdoor unit; and an indoor unit having an indoor heat exchanger and a pressure reducing device,

the indoor heat exchanger has a1 st heat exchange part and a2 nd heat exchange part,

the pressure reducing device is connected between the 1 st heat exchange part and the 2 nd heat exchange part,

the air conditioner performs a cooling operation or a dehumidifying operation in which the 1 st heat exchange unit and the 2 nd heat exchange unit function as evaporators, and a reheating dehumidifying operation in which the 1 st heat exchange unit functions as a condenser and the 2 nd heat exchange unit functions as an evaporator,

and (2) performing water slipping treatment on the No. 2 heat exchange part.

2. The air conditioner according to claim 1,

when the operation of the air conditioner is stopped after the cooling operation or the dehumidifying operation is performed, the reheating dehumidifying operation is performed to dry the inside of the indoor unit.

3. The air conditioner according to claim 1 or 2,

the 1 st heat exchange part is subjected to hydrophilization treatment.

Technical Field

The present invention relates to an air conditioner for drying the inside of an indoor unit, and more particularly, to an air conditioner for drying the inside of an indoor unit by a reheat dehumidification operation.

Background

When the air conditioner performs a cooling operation, condensed water is generated in the indoor heat exchanger functioning as an evaporator. The condensed water becomes a cause of mold and bacteria propagation in the indoor heat exchanger, instruments around the indoor heat exchanger, and a casing of the indoor unit. If mold and bacteria grow, the conditioned air blown out of the indoor unit may emit unpleasant odor. Therefore, an air conditioner has been proposed in which the interior of an indoor unit including an indoor heat exchanger is dried after a cooling operation (see, for example, patent document 1).

The air conditioner described in patent document 1 includes, in an indoor unit: an indoor heat exchanger including a front indoor heat exchange unit and a rear indoor heat exchange unit having a smaller volume than the front indoor heat exchange unit; and an indoor throttle valve connected between the front indoor heat exchange unit and the rear indoor heat exchange unit. In this air conditioner, the opening degree of the indoor throttle valve is reduced, and a reheat dehumidification operation (referred to as a cycle drying operation in patent document 1) in which the front-side indoor heat exchange unit functions as a condenser and the rear-side indoor heat exchange unit functions as an evaporator is performed.

When the interior of the indoor unit is dried, first, the reheat dehumidification operation is performed, and the front indoor heat exchange unit functions as a condenser, so that condensed water generated in the front indoor heat exchange unit during the cooling operation is evaporated. The condensed water that has turned into water vapor is blown out into the room together with air from the indoor unit, and the water vapor blown out into the room is sucked into the indoor unit again together with the indoor air, and turns into water droplets in the rear-side indoor heat exchange unit that functions as an evaporator. The condensed water that has been dropped into water droplets in the rear indoor heat exchange unit flows downward along the rear indoor heat exchange unit, and not all of the condensed water flows out of the rear indoor heat exchange unit, and a part of the condensed water remains in the rear indoor heat exchange unit. Therefore, after the reheat dehumidification operation, the blowing operation is performed to evaporate the condensed water remaining in the rear indoor heat exchange unit.

Patent document 1: japanese patent laid-open publication No. 2003-14334

Disclosure of Invention

However, in the air conditioner described in patent document 1, since the air supply operation is performed as described above and the condensed water remaining in the rear indoor heat exchange portion is evaporated, the condensed water that has become water vapor is blown out again into the room from the indoor unit together with the air. Therefore, the humidity in the room is increased, which may give an unpleasant feeling to the user.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an air conditioner capable of suppressing an increase in indoor humidity and drying the inside of an indoor unit.

In order to solve the above problem, an air conditioner according to the present invention includes an outdoor unit and an indoor unit, and the indoor unit includes an indoor heat exchanger and a pressure reducing device. The indoor heat exchanger has a1 st heat exchange unit and a2 nd heat exchange unit, and the pressure reducing device is connected between the 1 st heat exchange unit and the 2 nd heat exchange unit. The air conditioner performs a cooling operation or a dehumidifying operation in which the 1 st heat exchange unit and the 2 nd heat exchange unit function as evaporators, and a reheating dehumidifying operation in which the 1 st heat exchange unit functions as a condenser and the 2 nd heat exchange unit functions as an evaporator. Then, the 2 nd heat exchanger is subjected to a water-slipping treatment.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the air conditioner of the present invention configured as described above, even if the reheat dehumidification operation is performed in which the 2 nd indoor heat exchange unit functions as an evaporator in order to dry the inside of the indoor unit, the condensed water generated in the 2 nd indoor heat exchange unit subjected to the water-slipping treatment does not remain in the 2 nd indoor heat exchange unit. This makes it possible to dry the interior of the indoor unit while suppressing an increase in indoor humidity.

Drawings

Fig. 1 is an explanatory view of an air conditioner according to an embodiment of the present invention, where (a) is an external perspective view of an indoor unit and an outdoor unit, and (B) is an X-X sectional view of (a).

Fig. 2 is an explanatory view of an air conditioner according to an embodiment of the present invention, where (a) is a refrigerant circuit diagram, and (B) is a block diagram of an outdoor unit control unit and an indoor unit control unit.

Fig. 3 is a flowchart showing a process flow related to the internal drying operation performed after the cooling operation is stopped.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment will be described by taking an air conditioner in which an outdoor unit and an indoor unit are connected by 2 refrigerant pipes as an example.

The present invention is not limited to the following embodiments, and various modifications can be made without departing from the scope of the present invention.