Method for selecting heat medium of use-side heat exchanger during construction of air conditioning system

Abstract

This method for selecting the heat medium of a use-side heat exchanger during the construction of an air conditioning system is provided with: a first step for determining the ability necessary of use-side heat exchangers corresponding to a plurality of air conditioning spaces; a second step for calculating the total coolant quantity necessary when circulating the coolant through all of the use-side heat exchangers having the determined ability; a third step for calculating for each air conditioning space using the coolant the coolant concentration resulting from total coolant quantity having leaked at the air conditioning space; a fourth step for determining whether or not the coolant concentration of each air conditioning space will exceed a predetermined limit concentration; a fifth step for, when there is an air conditioning space exceeding the limit concentration in the fourth step, selecting a non-toxic heat medium as the circulating heat medium of the use-side heat exchanger installed for any one of the air conditioning spaces; and a sixth step for calculating the total coolant quantity necessary when circulating coolant in all of the use-side heat exchangers other than the use-side heat exchanger for which the non-toxic heat medium has been selected, and causing the result to be the total coolant quantity in the third step.

Description

technical field [0001] The present invention relates to an air conditioning apparatus applied to, for example, a multi-unit air conditioner for buildings. Background technique [0002] In an air conditioner, a heat source unit (outdoor unit) is arranged outside a building and an indoor unit is arranged inside a building, such as a multi-unit air conditioner for a building. The refrigerant circulating in the refrigerant circuit of such an air-conditioning apparatus radiates heat (absorbs heat) to the air supplied to the heat exchanger of the indoor unit, and heats or cools the air. Then, the heated or cooled air is sent into the air-conditioned space to be heated or cooled. [0003] As a rule, buildings have a plurality of indoor spaces, so such an air-conditioning system accordingly also consists of a plurality of indoor units. In addition, when the scale of the building is large, the refrigerant piping connecting the outdoor unit and the indoor unit may reach 100 m. When...

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Problems solved by technology

[0006] However, in the above-mentioned system in which the air conditioner using the refrigerant, water, or brine is mixed, it cannot be clearly determined which space the air conditioner using the refrigerant, water, or brine is used for.

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