Patent US5524455A successfully refreshed from Google Patents.
US5524455A
Expired / Lapsed
US
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Evaporator for cooling units
Assignee: Denso Corp
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Filing: 1995-03-30
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Granted: 1996-06-11
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Expires: 2015-03-30
Abstract
Abstract An amount of refrigerant fed to an evaporator 16 is adjusted by an open degree of an expansion valve 6 in accordance to a refrigerant pressure and a refrigerant temperature of an outlet side of the evaporator 16. The evaporator 16 has an evaporation part which includes a refrigerant passage 26 connecting parallel with an inflow passage 22 and an outflow passage 24 and further having a cooled passage 28 which forms a first throttle 30 at the downstream thereof and a cooling passage 32. The cooled passage 28 links the expansion valve 6 and the inflow passage 22. The cooling passage 32 is connected to the outflow passage 24 and leads refrigerant to an outlet. A heat exchange part 20 is provided to be able to of performing heat exchange between the cooled passage 28 and the cooling passage 32. A second throttle is set in a bypass passage 38 which links the upstream side of the cooled passage 28 and the downstream side of the first throttle 30.
Inventors
- 👤 Etsuo Hasegawa
- 👤 Yasushi Yamanaka
- 👤 Yoshiyuki Yamauchi
- 👤 Masahiro Shimoya
- 👤 Toshio Ohara
- 👤 Yoshiharu Kajikawa
- 👤 Toshihiro Yamamoto
- 👤 Kenichi Fujiwara
- 👤 Shin Nishida
- 👤 Yoshiaki Takano
- 👤 Nobuharu Kakehashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:02
CPC Classifications
F; F25; F25B; F25B40/00; F25B39/00; F25B39/02; F25B39/022; F25B41/00; F25B41/20; F25B41/30; F25B41/31; F25B41/33; F25B41/335; F25B41/39; F28; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0308; F28D1/0325; F28D1/0333; F28D1/0341; F25B2400/00; F25B2400/04; F25B2400/0417; F25B2400/0425
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
139 words
An evaporator for cooling units to be installed in the downstream from a pressure reducing value in a refrigerating cycle for circulating refrigerant, said evaporator comprising: an evaporation part having an inflow passage and an outflow passage which are connected in parallel with each other through a plurality of refrigerant passages; a heat exchange part having a cooled passage which links said pressure reducing valve and said inflow passage and a cooling passage which is connected to said outflow passage and leads said refrigerant to an outlet, said cooled passage being in heat exchange relationship with said cooling passage; a first throttle set in said refrigerant passage in the downstream from the cooled passage of said heat exchange part; a second throttle set in a bypass passage which detours at least said heat exchange part and said first throttle.
Claim 2
Dependent Claim
139 words
An evaporator for cooling units to be installed in the downstream from a pressure reducing value in a refrigerating cycle for circulating refrigerant, said evaporator comprising: an evaporation part having an inflow passage and an outflow passage which are connected in parallel with each other through a plurality of refrigerant passages; a heat exchange part having a cooled passage which links said pressure reducing valve and said inflow passage and a cooling passage which is connected to said outflow passage and leads said refrigerant to an outlet, said cooled passage being in heat exchange relationship with said cooling passage; a first throttle set in said refrigerant passage in the downstream from the cooled passage of said heat exchange part; a second throttle set in a bypass passage which detours at least said heat exchange part and said first throttle.
Claim 3
Dependent Claim
26 words
The evaporator for cooling units according to claim 1, wherein said bypass passage is branched from between said pressure reducing valve and said heat exchange part.
Claim 4
Dependent Claim
23 words
The evaporator for cooling units according to claim 1, wherein said bypass passage is branched from the upstream from said pressure reducing valve.
Claim 5
Dependent Claim
48 words
The evaporator for cooling units according to claim 3, wherein said second throttle disposed in said bypass passage is a switching valve for switching between an opening state and a closing state when a pressure difference between the upstream and the downstream becomes a preset amount or more.
Claim 6
Dependent Claim
40 words
The evaporator for cooling units according to claim 3, further comprising a switching valve for switching between an opening state and a closing state when a pressure difference between the upstream and the downstream becomes a preset amount or more.
Claim 7
Dependent Claim
57 words
The refrigerating cycle unit according to claim 5, further comprising: a gas-liquid separating means disposed in the downstream of said pressure reducing means for separating the refrigerant in the gas-liquid two phase state into a gas refrigerant and a liquid refrigerant so that the liquid refrigerant separated by said gas-liquid separating means flow into said bypass passage.
Claim 8
Dependent Claim
36 words
The refrigerating cycle unit according to claim 5, further comprising a means provided in the downstream from said first throttle for controlling the occurrence of the jet stream of said refrigerant flowed through said first throttle.
Claim 9
Dependent Claim
57 words
The refrigerating cycle unit according to claim 5, further comprising: a gas-liquid separating means disposed in the downstream of said pressure reducing means for separating the refrigerant in the gas-liquid two phase state into a gas refrigerant and a liquid refrigerant so that the liquid refrigerant separated by said gas-liquid separating means flows into said bypass passage.
Claim 10
Dependent Claim
36 words
The refrigerating cycle unit according to claim 5, further comprising a means provided in the downstream from said first throttle for controlling the occurrence of the jet stream of said refrigerant flowed through said first throttle.
Claim 11
Dependent Claim
39 words
The evaporator for cooling units according to claim 1, 2 or 3, further comprising a switch valve which closes when the pressure difference between the upstream and the downstream becomes the preset amount or more in said bypass passage.
Claim 12
Dependent Claim
68 words
The evaporator for cooling units according to claim 10, further comprising a gas-liquid separator which separates said refrigerant in the gas-liquid two phase state into a gaseous refrigerant and a liquid refrigerant in said cooled passage between said pressure reducing valve and said heat exchange part, said liquid refrigerant separated by said gas-liquid separator being branched by being connected to said bypass passage so as to flow thereinto.
Claim 13
Dependent Claim
45 words
The evaporator for cooling units according to claim 1, wherein said bypass passage is joined to said cooled passage in the downstream from said first throttle so that the occurrence of a jet stream of said refrigerant flowed through said first throttle can be prevented.
Claim 14
Dependent Claim
27 words
The evaporator for cooling units according to claim 1, further comprising a wall against which a jet stream of the refrigerant flowed through said first throttle collides.
Claim 15
Dependent Claim
48 words
The evaporator for cooling units according to claim 1, wherein said second throttle disposed in said bypass passage is a switching valve for switching between an opening state and a closing state when a pressure difference between the upstream and the downstream becomes a preset amount or more.
Claim 16
Dependent Claim
21 words
The evaporator for cooling units according to claim 14, wherein said switching valve has a valve seat achieving a throttle function.
Claim 17
Dependent Claim
40 words
The evaporator for cooling units according to claim 1, further comprising a switching valve for switching between an opening state and a closing state when a pressure different between the upstream and the downstream becomes a preset amount or more.
Claim 18
Dependent Claim
151 words
A refrigerating cycle unit comprising: a compressor for compressing and discharging refrigerant; a condenser for condensing the refrigerant discharged from said compressor; a pressure reducing means for pressure reducing and expansion of the liquid refrigerant condensed by said condenser; an evaporation part for evaporating the pressure reduced refrigerant by said pressure reducing means; a cooled passage for flowing the refrigerant flowed out of said pressure reducing means and flows into said evaporation part; a cooling passage for flowing the refrigerant flowed out of said evaporation part and flows into said compressor; a heat exchange part for performing heat exchange between the refrigerant flowing through said cooled passage and the refrigerant flowing through said cooling passage; a first throttle provided downstream of said cooled passage; a bypass passage detouring at last said cooled passage of said heat exchange part and said first throttle; and a second throttle provided in said bypass passage.
Claim 19
Dependent Claim
151 words
A refrigerating cycle unit comprising: a compressor for compressing and discharging refrigerant; a condenser for condensing the refrigerant discharged from said compressor; a pressure reducing means for pressure reducing and expansion of the liquid refrigerant condensed by said condenser; an evaporation part for evaporating the pressure reduced refrigerant by said pressure reducing means; a cooled passage for flowing the refrigerant flowed out of said pressure reducing means and flows into said evaporation part; a cooling passage for flowing the refrigerant flowed out of said evaporation part and flows into said compressor; a heat exchange part for performing heat exchange between the refrigerant flowing through said cooled passage and the refrigerant flowing through said cooling passage; a first throttle provided downstream of said cooled passage; a bypass passage detouring at last said cooled passage of said heat exchange part and said first throttle; and a second throttle provided in said bypass passage.
Claim 20
Dependent Claim
24 words
The refrigerating cycle unit according to claim 17, wherein said bypass passage is branched from between said pressure reducing means and said cooled passage.
Claim 21
Dependent Claim
22 words
The refrigerating cycle unit according to claim 17, wherein said bypass passage is branched from the upstream of said pressure reducing means.
References Cited (Backward Citations)
JPS49536A
Cited
JPS52123364A
Cited
JPS5347647A
Cited
JPS5480063A
Cited
US4621501A
Cited
JPS5841429A
Cited
US4589265A
Cited
JPH0263146A
Cited
US4959972A
Cited
EP0497339A2
Cited
US5245843A
Cited
EP0611926A1
Cited
US5390507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-11 | 1999-12-11 | 2000-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-11 | 2003-12-11 | 2004-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-11 | 2007-12-11 | 2008-06-11 | $7700.00 | Window Closed / Lapsed |