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US4114397A Expired / Lapsed US ⏱️ 0.0 years remaining

Evaporator

Assignee: Hitachi Ltd
•
Filing: 1976-11-19
•
Granted: 1978-09-19
•
Expires: 1996-11-19
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Abstract

Abstract An evaporator comprising a tube plate having a number of through holes to which the upper ends of a plurality of U-tubes are fixed, a first cover plate secured to the tube plate and having a plurality of through holes aligned to some through holes of the tube plate, a second cover plate secured to the first cover plate and defining in cooperation therewith passages for introducing and distributing refrigerant, and an expansion valve assembly installed through the first and second cover plates and having a constriction formed therein. The first cover plate defines connecting passages and a collecting passage for the refrigerant in cooperation with the tube plate. The constriction in the expansion valve assembly is communicated with the refrigerant-introducing passage, and the control section of the expansion valve assembly is communicated with the refrigerant-collecting passage, so that the refrigerant flows through a high-pressure piping into the refrigerant-introducing passage and the vaporized refrigerant passes through the refrigerant-collecting passage and leaves the evaporator into a low-pressure piping.

Inventors

  • 👤 Reijiro Takahashi
  • 👤 Masanori Musoh
  • 👤 Tosikazu Ito

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 09:23
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/047; F28D1/0475; B; B60; B60H; B60H1/00; B60H1/00485; F25; F25B; F25B39/00; F25B39/02; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335; F25B2341/00; F25B2341/06; F25B2341/068; F25B2341/0683; F25B2500/00; F25B2500/18

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 102 words
An evaporator comprising: a tube plate, a first cover plate secured to said tube plate to form connecting passage means and refrigerant-collecting passage means between said tube plate and said first cover plate, a second cover plate secured to said first cover plate to form refrigerant-introducing passage means between said first cover plate and said second cover plate, constriction means communicated with said refrigerant-introducing passage means, expansion valve means disposed between said first cover plate and said second cover plate and directly communicated with said refrigerant-collecting passage means and said refrigerant-introducing passage means, and control means for controlling said expansion valve means.
Claim 2
Dependent Claim 102 words
An evaporator comprising: a tube plate, a first cover plate secured to said tube plate to form connecting passage means and refrigerant-collecting passage means between said tube plate and said first cover plate, a second cover plate secured to said first cover plate to form refrigerant-introducing passage means between said first cover plate and said second cover plate, constriction means communicated with said refrigerant-introducing passage means, expansion valve means disposed between said first cover plate and said second cover plate and directly communicated with said refrigerant-collecting passage means and said refrigerant-introducing passage means, and control means for controlling said expansion valve means.
Claim 3
Dependent Claim 23 words
The evaporator of claim 1 wherein said constriction means and said expansion valve means are integrally combined to form a valve mechanism section.
Claim 4
Dependent Claim 14 words
The evaporator of claim 2 further comprising a high-pressure piping and a low-pressure piping.
Claim 5
Dependent Claim 19 words
The evaporator of claim 2 wherein said connecting passage means and said refrigerant-collecting passage means are communicated with U-tubes.
Claim 6
Dependent Claim 22 words
The evaporator of claim 2 wherein said valve mechanism section and said first and second cover plates have seal means respectively therebetween.
Claim 7
Dependent Claim 21 words
The evaporator of claim 1 wherein said second cover plate is formed with both outlet and inlet openings for the refrigerant.
Claim 8
Dependent Claim 19 words
The evaporator of claim 6 wherein said connecting passage means and said refrigerant-collecting passage means are communicated with U-tubes.
Claim 9
Dependent Claim 31 words
The evaporator of claim 6 further comprising a high-pressure piping and a low-pressure piping, said high-pressure piping being connected to said inlet opening and said low-pressure piping to said outlet opening.
Claim 10
Dependent Claim 19 words
The evaporator of claim 1 wherein said connecting passage means and said refrigerant-collecting passage means are communicated with U-tubes.
Claim 11
Dependent Claim 14 words
The evaporator of claim 1 further comprising a high-pressure piping and a low-pressure piping.
Claim 12
Dependent Claim 33 words
The evaporator of claim 1 wherein said second cover plate is formed with an inlet opening for the refrigerant and said first cover plate is formed with an outlet opening for the refrigerant.
Claim 13
Dependent Claim 21 words
The evaporator of claim 1 wherein said second cover plate is formed with both inlet and outlet openings for the refrigerant.

References Cited (Backward Citations)

US1813486A Cited
US2704929A Cited
US3030782A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-09-18 1982-03-20 1982-09-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-09-18 1986-03-20 1986-09-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-09-18 1990-03-20 1990-09-19 $7700.00 Window Closed / Lapsed

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