Air conditioner

Abstract

The invention is aimed to solve the problems that air supply operation allows the introduction of outside air into a room but gives unpleasant feels to dwellers when the outside air is contaminated by various materials, and if the outside air is introduced into the room via a filter to solve this problem, an air cleaning filter provided in an air supply / exhaust unit brings about the air supply / exhaust unit to be wider and so its heat exchanger should be smaller resulting in a reduction in the capability of conditioning temperature / humidity as the originally basic purpose of an air-conditioner and the heat exchanger, and if not changed in size, it brings about an indoor unit to be larger in shape. An air supply filter 21 is provided through which outside air passes during air supplying operation. The rotating shaft of a sub-fan 19 is arranged in parallel to the rotating shaft of a main fan 9 so that the air suction face of the sub-fan 19 is not at a right angle to the air passage face of the air supply filter 21.

Description

technical field [0001] The present invention relates to an air conditioner capable of ventilation operation. Background technique [0002] In recent years, it has been pointed out that the airtightness between living areas of family houses has increased, and that harmful substances contained in building materials have an impact on the human body. In addition, there is a problem that the concentration of carbon dioxide in the living space increases due to an increase in airtightness. These problems have all become problems to be solved by air conditioners that need to adjust the indoor air. [0003] Such an air conditioner is described in Unexamined-Japanese-Patent No. 2000-274727 (patent document 1). This patent document 1 discloses a split-type air conditioner, which is equipped with a fan that can switch forward and reverse rotation in one ventilation duct, and has an exhaust function that discharges indoor air to the outside by switching the rotation direction of the fa...

AI Technical Summary

Problems solved by technology

In the case where the size of the heat exchanger is not changed, there is a problem that the shape of the indoor unit becomes larger

[0007] In addition, in the case of exhaust operation in which indoor air is exhausted to the outside, since the air exhausted to the outside passes through the air cleaning filter, there is a problem that the ventilation resistance at the time of exhaust is increased and the amount of exhausted air is reduced.

[0008] In addition, the air conditioner in Patent Document 1 does not take into account the maintainability of the filter and the delivery pipe arranged in the sub-fan unit.

[0009] In addition, the air conditioner in Patent Document 1 does not consider the situation when the auxiliary fan stops operating.

[0010] In addition, the air conditioner in Patent Document 1 only has the modes of intake operation and air supply operation, and does not consider other operations of the auxiliary fan.

[0011] In addition, the air conditioner in Patent Document 1 does not take into consideration that insects enter the intake and exhaust ducts passing through the outdoors, etc.

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