The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2023
Filed:
Jun. 22, 2021
Mitsubishi Electric Corporation, Tokyo, JP;
Yoji Onaka, Chiyoda-ku, JP;
Takashi Matsumoto, Chiyoda-ku, JP;
Kosuke Miyawaki, Chiyoda-ku, JP;
Hiroyuki Okano, Chiyoda-ku, JP;
Takanori Koike, Chiyoda-ku, JP;
Takeshi Hatomura, Chiyoda-ku, JP;
Osamu Morimoto, Chiyoda-ku, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A header includes a plurality of branch tubes and a header manifold. If refrigerant flowing into the header manifold forms a pattern of annular flow or churn flow, tips of the branch tubes inserted into the header manifold pass through a liquid-phase portion having a thickness δ [m] and reach a gas-phase portion. The thickness δ [m] of the liquid-phase portion is defined as δ=G×(1−x)×D/(4ρ×U), where G is a flow speed [kg/(ms)] of the refrigerant, x is a quality of the refrigerant, D is an inside diameter [m] of the header manifold, ρis a liquid density [kg/m] of the refrigerant, Uis a reference apparent liquid speed [m/s] that is a maximum value within a range of variation in an apparent gas speed of the refrigerant flowing into a flow space of the header manifold. The reference apparent liquid speed U[m/s] is defined as G(1−x)/ρ.