# US 11,029,072 B2 · Cooling device

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- Number: US 11,029,072 B2
- Document ID: US11029072B2
- Status: Granted
- Kind: B2
- Application number: 15/538,512
- Filed: 2016-01-05
- Published: 2017-12-07
- Granted: 2021-06-08
- Earliest claimed: 2015-01-05
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Shinji Hirai; Makoto Kobayashi; Masanaga Tanaka
- Web page: https://patentgrep.com/patent/US11029072B2

## CPC

- F25B 5/04: arranged in series
- F25B 1/005: {of the single unit type (F25B1/10 takes precedence)}
- F25B 6/04: arranged in series
- F25B 39/04: Condensers
- F25B 41/20: Disposition of valves, e.g. of on-off valves or flow control valves (expansion valves F25B41/31)
- F25B 49/02: for compression type machines, plants or systems
- F25D 11/022: {with two or more evaporators}
- F25D 21/04: Preventing the formation of frost or condensate
- F25B 2339/041: of evaporative condensers
- F25B 2400/0403: for condensers
- F25B 2400/0409: for evaporators
- F25B 2600/2501: Bypass valves
- F25C 2700/12: Temperature of ice trays
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B)
- F25C: PRODUCING, WORKING OR HANDLING ICE

## Abstract

A cooling device including a freezing cycle including a compressor, a condenser, a pressure reducing means, and an evaporator is provided. In the cooling device, the condenser includes a first condenser and a second condenser independent from each other, the second condenser being positioned at a downstream side of the first condenser in a refrigerant channel, and the first condenser and the second condenser are connected to each other through a dew condensation preventing pipe.

## Claims

### Claim 1

A refrigerator comprising:
a freezing cycle including:
a compressor;
a first condenser and a second condenser independent from each other and connected to each other through a dew condensation preventing pipe, the second condenser being positioned at a downstream side of the first condenser in a refrigerant channel;
a cooling evaporator;
a first pressure reducing tube disposed along the refrigerant channel and connected to the cooling evaporator;
a bypass branched between the second condenser and the first pressure reducing tube and joined between the first pressure reducing tube and the cooling evaporator,
an ice-making evaporator disposed in the bypass;
an ice-making tray;
a second pressure reducing tube disposed at an upstream side of the ice-making evaporator in the bypass;
a temperature sensor provided in the ice-making tray; and
a switching valve disposed at a branch point of the bypass, the switching valve being configured to switch a flow of refrigerant along the refrigerant channel to maintain a temperature detected by the temperature sensor between an upper limit temperature and a lower limit temperature by:
connecting the second condenser and the bypass when the temperature detected by the temperature sensor is greater than or equal to the upper limit temperature value during which the ice-making evaporator is not to be operated, and
connecting the second condenser and the first pressure reducing tube when the temperature detected by the temperature sensor is less than or equal to the lower limit temperature value during which the ice-making evaporator is to be operated.

### Claim 2 (depends on 1)

The refrigerator as claimed in claim 1, further comprising:
a third pressure reducing tube disposed at a downstream side of the ice-making evaporator in the bypass.