Inspection method of valve group and valve group unit and valve group unit

Abstract

Provided are a valve block and a valve block unit which allow simplification and miniaturization of a pipe arrangement. A valve block 350 according to the present invention includes at least one flow direction switching means 22 including a valve body 304a, the means selectively switching between conductions of a fluid (heat medium), a first pipe (heating outward-flow main pipe 308) and a second pipe (cooling outward-flow main pipe 307), switched by the flow direction switching means 22, allowing the fluid to be conveyed therethrough, and a third pipe (first branch pipe 3) that selectively communicates with the first pipe or the second pipe, the flow direction switching means, the first pipe, the second pipe, and the third pipe being connected to each other.

Description

technical field [0001] The present invention relates to a valve group having a plurality of pipes and at least one flow switching device, a valve group unit formed by connecting a plurality of the valve groups, and a method for inspecting the valve group unit, and particularly relates to a valve group unit capable of simplifying and miniaturizing the piping structure Valve blocks and valve block units. Background technique [0002] At present, there are multi-type air conditioners for large buildings using an air-conditioning device that circulates a refrigerant between an outdoor unit that is a heat source unit disposed outdoors and an indoor unit disposed indoors. Cooling energy or heating energy is sent to an area to be air-conditioned such as a room, and a cooling operation or a heating operation is performed (for example, refer to Patent Document 1). As refrigerants used in such air conditioners, for example, HFC refrigerants are often used. In addition, in recent yea...

AI Technical Summary

Problems solved by technology

However, since the heat exchange between the refrigerant and the water is carried out in the outdoor unit, and the water is sent to the indoor unit, the water transfer power becomes very large, which increases energy consumption.

In addition, in the case of supplying both cooling energy and heating energy using water or the like, it is necessary to connect a plurality of pipes, which takes a lot of labor, time, and expense required for installation work.

When storing connecting piping, valves, and heat exchangers on the device side in advance to simplify on-site piping work, the device for storing piping and valves becomes very large, resulting in increased cost and reduced productivity

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