DEFROSTING REFRIGERATOR AND CONTROL METHOD

TEPZZ 757¥¥5A_T
(19)
(11)
EP 2 757 335 A1
EUROPEAN PATENT APPLICATION
(12)
published in accordance with Art. 153(4) EPC
(51) Int Cl.:
(43) Date of publication:
F25D 21/06 (2006.01)
23.07.2014 Bulletin 2014/30
F25D 21/12 (2006.01)
(86) International application number:
(21) Application number: 11872392.3
PCT/CN2011/079604
(22) Date of filing: 14.09.2011
(87) International publication number:
WO 2013/037106 (21.03.2013 Gazette 2013/12)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB
GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO
PL PT RO RS SE SI SK SM TR
(71) Applicants:
• Hefei Midea Refrigerator Co., Ltd.
Hefei, Anhui 230601 (CN)
• Hefei Hualing Co., Ltd.
Hefei, Anhui 230601 (CN)
(72) Inventors:
(74) Representative: Maiwald Patentanwalts GmbH
• FANG, Zhongcheng
Hefei, Anhui 230601 (CN)
(54)
• WU, Tingbo
Hefei, Anhui 230601 (CN)
• JIANG, Mingbo
Hefei, Anhui 230601 (CN)
• ZONG, Zhaomeng
Hefei, Anhui 230601 (CN)
• JIN, Yongzhe
Hefei, Anhui 230601 (CN)
• FU, Xiuliang
Hefei, Anhui 230601 (CN)
Elisenhof
Elisenstrasse 3
80335 München (DE)
DEFROSTING REFRIGERATOR AND CONTROL METHOD THEREFOR
EP 2 757 335 A1
(57)
A defrosting refrigerator (10) and a control method for the defrosting refrigerator (10), the defrosting refrigerator comprises: a body (100), an air duct (120) disposed in the body (100) to define an intermediate room
(130) and an air duct (140) between the cover plate for
an duct (120) and an inner wall of the body (100), a door
body (200), an evaporator (400), a defrosting sensor
(410) disposed on the evaporator (400) for detecting the
temperature of the evaporator (400), a compressor (300),
a fan (500) disposed inside the air duct (140) for circulating air between the air duct (140) and the intermediate
room (130), and a controller (800) connected respectively
to the defrosting sensor (410), the compressor (300) and
the fan (500), so as to stop the operation of the compressor (300) and continue the operation of the fan (500) each
time a predetermined number of ON-OFF period is completed, until the temperature detected by the defrosting
sensor (410) reaching a first temperature (Trd). The defrosting refrigerator (10) of such a structure saves the
inner space of the refrigerator, reduces the overall costs
and save energy.
Printed by Jouve, 75001 PARIS (FR)
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EP 2 757 335 A1
Description
BACKGROUND
Technical Field
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[0001] Embodiments of the present invention generally
relate to refrigeration field, more particularly, to a refrigerator having defrosting function and a control method
thereof.
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Description of the Related Art
[0002] Frost-free refrigerators are popular in market
because of the advantages of uniform temperature, quick
refrigeration and automatic defrosting.
[0003] The frost-free refrigerator in the related art indirectly cools food stored therein via a forced air convection circulation by a fan.
[0004] During refrigeration, a temperature of a surface
of an evaporator is lower than the dew-point temperature
of the air in the refrigerator, the air is circulated constantly
in the refrigerator, and the frost is formed on the surface
of the evaporator, thus greatly reducing an efficiency of
heat exchange, so that the defrosting operation shall be
performed after the refrigerator operates for a certain period of time.
[0005] The defrosting is performed by means of a defrosting device which is generally embodied as a defrosting heater such as an aluminum tube heater, a steel tube
heater and a quartz tube heater, the defrosting heater is
generally mounted on the surface of the evaporator or
adjacent to the evaporator.
[0006] However, the defrosting device not only occupies an internal space of the refrigerator, but also increases a cost of the refrigerator. Furthermore, during defrosting, the electrical energy shall be supplied to the heater,
so that the energy consumption of the refrigerator is increased by about 5% to about 10%. In addition, the local
temperature of the defrosting heater is high when the
defrosting heater is energized, which is disadvantageous
for the refrigerator especially using R600a or other flammable refrigerants.
SUMMARY
[0007] Embodiments of the present invention seek to
solve at least one of the problems existing in the related
art to at least some extent.
[0008] A first object of the present invention is to provide a refrigerator having defrosting function.
[0009] A second object of the present invention is to
provide a control method of a refrigerator having defrosting function.
[0010] Accordingly, embodiments according to a first
abroad aspect of the present invention provide a refrigerator having defrosting function comprising: a cabinet;
an air channel plate disposed in the cabinet to define a
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refrigeration chamber and an air channel between the air
channel plate and a rear wall of the cabinet within the
cabinet; a door; an evaporator mounted in the air channel;
a defrosting sensor disposed on the evaporator to detect
a temperature of the evaporator; a compressor coupled
with the evaporator; a fan disposed in the air channel for
circulating air between the air channel and the refrigeration chamber; and a controller coupled with the defrosting sensor, the compressor and the fan respectively, in
which after the compressor operates for a predetermined
number of ON-OFF cycles each time, the controller controls the compressor to stop and controls the fan to continuously operate until a temperature detected by the defrosting sensor reaching a first temperature.
[0011] With the refrigerator according to embodiments
of the present invention, the controller controls operations of the compressor and the fan in accordance with
the temperature detected by the defrosting sensor. When
the compressor stops, the air is circulated between the
refrigeration chamber and the air channel to defrost by
operating the fan, so that there is no need to dispose a
defrosting device in the refrigerator and thereby no electrical energy is consumed by the defrosting device, thus
saving the internal space of the refrigerator and decreasing the cost of the refrigerator, moreover, the energy consumption of the refrigerator is also reduced. In addition,
the defects of a high local temperature caused by the
defrosting device are eliminated, and it is advantageous
for the refrigerator using flammable refrigerants.
[0012] In some embodiments, the refrigerator having
defrosting function further comprises: a temperature sensor disposed in the refrigeration chamber to detect a temperature of the refrigeration chamber and coupled with
the controller. During the predetermined number of ONOFF cycles, when the temperature detected by the temperature sensor reaches a second temperature, the controller controls the compressor to stop and controls the
fan to continuously operate until the temperature detected by the defrosting sensor reaches a third temperature,
in which the first temperature is higher than or equal to
the third temperature.
[0013] When the refrigerator is operated in an extreme
environment, such as an environment with high temperature and high humidity, more frost may be formed on
the surface of the evaporator, so that an auxiliary defrosting may be performed in the predetermined number of
ON-OFF cycles of the compressor, besides the defrosting performed in each operation cycle. The auxiliary defrosting may be operated in each OFF period of the compressor (i.e. the compressor stops during this OFF period) of the predetermined number of ON-OFF cycles or
after a plurality of ON-OFF cycles. The refrigerator according to embodiments of the present invention can defrost more frost and the defrosting time is reduced.
[0014] In some embodiments, the first temperature is
3 °C to 5 °C.
[0015] In some embodiments, during the predetermined number of ON-OFF cycles, when the temperature
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detected by the defrosting sensor reaches the third temperature, the controller controls the fan to stop.
[0016] The fan may stop for a period of time, thus increasing a lifetime of the fan.
[0017] In some embodiments, after the compressor
operates for the predetermined number of ON-OFF cycles or when the temperature detected by the temperature sensor reaches the second temperature, the controller controls the fan to increase a speed of the fan.
[0018] At the beginning of defrosting, the speed of the
fan is increased so as to accelerate the heat exchange,
shorten the defrosting time, and reduce the temperature
increment.
[0019] Embodiments according to a second abroad aspect of the present invention provide a control method of
a refrigerator having defrosting function, the control
method comprising steps of: detecting if a compressor
of the refrigerator operates for a predetermined number
of ON-OFF cycles; and after the compressor operates
for a predetermined number of ON-OFF cycles each
time, stopping the compressor and continuously operating a fan of the refrigerator until a temperature of an evaporator of the refrigerator reaching a first temperature, so
as to defrost the evaporator disposed in an air channel
of the refrigerator.
[0020] With control method according to embodiments
of the present invention, operations of the compressor
and the fan are controlled in accordance with the temperature detected by the defrosting sensor. When the
compressor stops, the air is circulated between the refrigeration chamber and the air channel to defrost by operating the fan, so that a defrosting device is not needed
and thereby no electrical energy is consumed by the defrosting device, thus saving the internal space of the refrigerator and decreasing the cost of the refrigerator,
moreover, the energy consumption of the refrigerator is
also reduced. In addition, the defects of a high local temperature caused by the defrosting device are eliminated,
and it is advantageous for the refrigerator using flammable refrigerants.
[0021] In some embodiments, the control method further comprises the step of: during the predetermined
number of ON-OFF cycles, when a temperature of a refrigeration chamber of the refrigerator reaches a second
temperature, stopping the compressor and continuously
operating the fan until the temperature of the evaporator
reaches a third temperature, in which the first temperature is higher than or equal to the third temperature.
[0022] When the refrigerator is operated in an extreme
environment, such as an environment with high temperature and high humidity, more frost may be formed on
the surface of the evaporator, so that an auxiliary defrosting may be performed in the predetermined number of
ON-OFF cycles of the compressor, besides the defrosting performed in each operation cycle. The auxiliary defrosting may be operated in each OFF period of the compressor (i.e. the compressor stops during this OFF period) of the predetermined number of ON-OFF cycles or
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after a plurality of ON-OFF cycles. The refrigerator according to embodiments of the present invention can defrost more frost and the defrosting time is reduced.
[0023] In some embodiments, the first temperature is
3 °C to 5 °C.
[0024] In some embodiments, during the predetermined number of ON-OFF cycles, when the temperature
of the evaporator reaches the third temperature, the fan
stops operating.
[0025] The fan may stop for a period of time, thus increasing a lifetime of the fan.
[0026] In some embodiments, after the compressor
operates for the predetermined number of ON-OFF cycles or when the temperature of the refrigeration chamber
reaches the second temperature, a speed of the fan is
increased.
[0027] At the beginning of defrosting, the speed of the
fan is increased so as to accelerate the heat exchange,
shorten the defrosting time, and reduce the temperature
increment.
[0028] Additional aspects and advantages of embodiments of present invention will be given in part in the
following descriptions, become apparent in part from the
following descriptions, or be learned from the practice of
the embodiments of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
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[0029] These and other aspects and advantages of
embodiments of the present invention will become apparent and more readily appreciated from the following
descriptions made with reference to the accompanying
drawings, in which:
Fig. 1 is a schematic view of a refrigerator according
to embodiments of the present invention;
Fig. 2 is a schematic block diagram of a refrigerator
according to embodiments of the present invention;
Fig. 3 is a schematic view illustrating curves of operations of a defrosting sensor, a fan and a compressor in a normal defrosting mode according to an embodiment of the present invention;
Fig. 4 is a flow chart illustrating a normal defrosting
mode of a control method of a refrigerator according
to an embodiment of the present invention;
Fig. 5 is a schematic view illustrating operations of
a defrosting sensor, a fan and a compressor in an
auxiliary defrosting mode according to another embodiment of the present invention;
Fig. 6 is a flow chart illustrating an auxiliary defrosting
mode of a control method of a refrigerator according
to another embodiment of the present invention.
DETAILED DESCRIPTION OF THE EMBODIMENT(S)
55
[0030] Reference will be made in detail to embodiments of the present invention. The embodiments described herein with reference to drawings are explana-
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tory, illustrative, and used to generally understand the
present invention. The embodiments shall not be construed to limit the present invention. The same or similar
elements and the elements having same or similar functions are denoted by like reference numerals throughout
the descriptions.
[0031] In the specification, unless specified or limited
otherwise, relative terms such as "central", "longitudinal",
"lateral", "front", "rear", "right", "left", "inner", "outer", "lower", "upper", "horizontal", "vertical", "above", "below",
"up", "top", "bottom" as well as derivative thereof (e.g.,
"horizontally", "downwardly", "upwardly", etc.) should be
construed to refer to the orientation as then described or
as shown in the drawings under discussion. These relative terms are for convenience of description and do not
require that the present invention be constructed or operated in a particular orientation.
[0032] Unless specified or limited otherwise, the terms
"mounted," "connected," "supported," and "coupled" and
variations thereof are used broadly and encompass both
direct and indirect mountings, connections, supports,
and couplings. Further, "connected" and "coupled" are
not restricted to physical or mechanical connections or
couplings.
[0033] The refrigerator having defrosting function and
a control method of a refrigerator having defrosting function will be described in the following with reference to
the figures.
[0034] Fig. 1 is a schematic view of a refrigerator according to embodiments of the present invention. As
shown in Fig. 1, the refrigerator having defrosting function
10 comprises a cabinet 100, a door 200 connected with
the cabinet 100, a compressor 300, an evaporator 400
and a fan 500.
[0035] In an embodiment of the present invention, an
air channel plate 120 is disposed in the cabinet 100 to
define a refrigeration chamber 130 and an air channel
140 between the air channel plate 120 and a rear wall of
the cabinet 100 within the cabinet 100. An air channel
foam 110 is mounted on a surface of the air channel plate
exposed to the air channel 140. An air outlet 600 communicating the air channel 140 with the refrigeration
chamber 130 are formed in upper portions of the air channel foam 110 and the air channel plate 120, and an air
inlet 700 communicating the air channel 140 with the refrigeration chamber 130 are formed in lower portions of
the air channel foam 110 and the air channel plate 120.
[0036] In an embodiment of the present invention, the
evaporator 400 is mounted in the air channel 140. A defrosting sensor 410 for detecting the temperature of the
evaporator 400 is disposed on the evaporator 400.
[0037] Preferably, the defrosting sensor 410 is disposed at an outlet of the evaporator 400 where much
frost is easiest to form. The compressor 300 coupled with
the evaporator 400 is disposed in a compressor compartment located in a lower- rear side of the cabinet 100. The
fan 5 is disposed in the air channel 140, and the air is
circulated between the air channel 140 and the refriger-
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ation chamber 130 by the fan 500.
[0038] More specifically, the fan 5 is disposed at a position adjacent to the evaporator 400, for example, adjacent to the upper portion of the evaporator 400.
[0039] In an embodiment of the present invention, the
refrigerator 10 having defrosting function further comprises a controller 800 disposed in a top of the cabinet 100.
[0040] Fig. 2 is a schematic block diagram of a refrigerator according to embodiments of the present invention. As shown in Fig. 2, the controller 800 is coupled with
the defrosting sensor 410, the compressor 300 and the
fan 500 respectively, so that after the compressor 300
operates for a predetermined number of ON-OFF cycles
each time, the controller 800 controls the compressor
300 to stop and controls the fan 500 to continuously operate until a temperature detected by the defrosting sensor 410 reaching a first temperature.
[0041] With the refrigerator 10 having defrosting function according to embodiments of the present invention,
the controller 800 controls operations of the compressor
300 and the fan 500 in accordance with the temperature
detected by the defrosting sensor 410. When the compressor 300 stops, the air is circulated between the refrigeration chamber 130 and the air channel 140 to defrost by operating the fan 500, so that an additional defrosting device is not needed and thereby no electrical
energy is consumed by the defrosting device, thus saving
the internal space of the refrigerator and decreasing the
cost of the refrigerator. Moreover, the energy consumption of the refrigerator is also reduced. In addition, the
defects of a high local temperature caused by the defrosting device are eliminated, and it is advantageous for
the refrigerator using flammable refrigerants.
[0042] Fig. 3 is a schematic view illustrating curves of
operations of a defrosting sensor, a fan and a compressor
in a normal defrosting mode according to an embodiment
of the present invention.
[0043] The refrigerator 10 having defrosting function
defrosts once in each operation cycle. The operation cycle means a time interval between a beginning of one
defrosting action and a beginning of the next defrosting
action of the refrigerator (that is, T shown in Fig. 2 indicates an operation cycle). The operation cycle is generally determined by the accumulated operation time of the
compressor, the "ON" time of the refrigerator or other
factors. Each operation cycle consists of a predetermined
number of ON-OFF cycles (t0) and one defrosting cycle
(t1). As shown in Figs. 3 and 5, term "ON" means that
the fan or the compressor operates, and term "OFF"
means that the fan or the compressor stops.
[0044] After the compressor 300 operates for the predetermined number of ON-OFF cycles, the controller 800
controls the refrigerator to operate for a defrosting cycle
(t1).
[0045] When the refrigerator operates for the defrosting cycle (t1), the compressor 300 stops and the fan 500
continuously operates. The air in the refrigeration chamber 130 exchanges heat with a surface of the evaporator
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400 until the temperature detected by the defrosting sensor 410 reaching a first temperature (Trd), then the controller 800 controls the refrigerator 10 to stop defrosting
and back to a normal refrigeration mode. The defrosting
cycle (t1) is determined by the first temperature (Trd)
which is generally higher than 0 °C.
[0046] Preferably, the first temperature (Trd) is 3 °C to
5 °C, more preferably, is 5°C.
[0047] Fig. 4 is a flow chart illustrating a normal defrosting mode of a control method of a refrigerator according to an embodiment of the present invention.
[0048] As shown in Fig. 4, the control method of a refrigerator in the normal defrosting mode comprises steps
of:
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S401, operating the compressor 300 and the fan
500.
S402, detecting if the compressor 300 operates for
the predetermined number of ON-OFF cycles.
S403, if the compressor does, stopping the compressor 300; if the compressor does not, returning back
to Step S401.
S404, continuously operating the fan 500.
S405, detecting if the temperature of the evaporator
400 reaches the first temperature (Trd).
S406, if the temperature of the evaporator does,
stopping the normally defrosting; if the temperature
of the evaporator does not, returning back to Step
S404.
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[0049] In embodiments of the present invention, the
compressor 300 and the fan 500 are controlled according
to the temperature of the evaporator 400. When the compressor 300 stops, the air is circulated between the refrigeration chamber 130 and the air channel 140 to defrost by operating the fan 500, so that an additiinal defrosting device is not needed and thereby no electrical
energy is consumed by the defrosting device, thus saving
the internal space of the refrigerator and decreasing the
cost of the refrigerator, moreover, the energy consumption of the refrigerator is also reduced. In addition, the
defects of a high local temperature caused by the defrosting device are eliminated, and it is advantageous for
the refrigerator using flammable refrigerants.
[0050] In an embodiment, the refrigerator 10 having
defrosting function 10 further comprises a temperature
sensor 131. The temperature sensor 131 is disposed in
the refrigeration chamber 130 for detecting a temperature
in the refrigeration chamber 130.
[0051] In an embodiment of the present invention, the
temperature sensor 131 is disposed on an inner wall of
the refrigeration chamber 130. As shown in Fig. 2, the
controller 800 is coupled with the temperature sensor
131, so as to stop the compressor 300 and continuously
to operate the fan 500 until the temperature detected by
the defrosting sensor 410 reaches a third temperature in
the predetermined number of ON-OFF cycles, when the
temperature detected by the temperature sensor 131
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reaches a second temperature.
[0052] The first temperature is higher than or equal to
the third temperature. Preferably, the second temperature is about 2°C.
[0053] In embodiments of the present invention, when
the refrigerator is operated in an extreme environment,
such as an environment with high temperature and high
humidity, more frost may be formed on the surface of the
evaporator 400, so that an auxiliary defrosting may be
performed in the predetermined number of ON-OFF cycles of the compressor 400, besides the defrosting performed in each operation cycle. The auxiliary defrosting
may be operated in each OFF period of the compressor
400 (i.e. the compressor 300 stops during this OFF period) of the predetermined number of ON-OFF cycles or
after a plurality of ON-OFF cycles. The refrigerator according to embodiments of the present invention can defrost more frost and the defrosting time is reduced.
[0054] Fig. 5 is a schematic view illustrating operations
of a defrosting sensor, a fan and a compressor in an
auxiliary defrosting mode according to embodiments of
the present invention.
[0055] Fig. 5 illustrates operations of the auxiliary defrosting mode in one ON-OFF cycle (t0). When the temperature detected by the temperature sensor 131 reaches a starting temperature (Trk), the compressor 300 and
the fan 500 operate to cool, so the temperature in the
refrigeration chamber 130 decreases and the frost is
formed on the surface of the evaporator 400.
[0056] When the temperature detected by the temperature sensor 131 reaches a second temperature (Trt),
the compressor 300 stops, the fan 500 continuously operates, and the air in the refrigeration chamber 130 exchanges heat with the surface of the evaporator 400 until
the temperature detected by the defrosting sensor 410
reaches a third temperature (Trq), then the fan 500 stops.
In the predetermined number of ON-OFF cycles (t0), the
operation time (t1) of the compressor 300 is determined
by both of the Trk and the Trt, and the operation time (t2)
of the fan 500 is determined by the third temperature
(Trq) which is generally higher than or equal to 0 °C.
[0057] In an embodiment of the present invention,
when the temperature detected by the defrosting sensor
410 reaches the third temperature (Trq), the controller
800 stops the fan 500. Therefore, before the next operation cycle (T) starts, the fan 500 may operate continuously, and may stop for a period of time during the compressor 300 stopping.
[0058] In an embodiment of the present invention, the
first temperature (Trd) is higher than the third temperature (Trq).
[0059] More specifically, the first temperature (Trd) is
5 °C and the third temperature (Trq) is 3 °C, so that the
fan 500 may stop for the period of time in each of the
ON-OFF cycles (t0), so as to increase a life time thereof.
[0060] In an embodiment of the present invention, the
controller 800 increases an speed of the fan 500, after
the compressor 300 operates for the predetermined
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number of ON-OFF cycles (t0), or when the temperature
detected by the temperature sensor 131 reaches the second temperature (Trt).
[0061] According to embodiments of the present invention, at the beginning of defrosting, the speed of the fan
500 is increased (the increased speed of the fan is higher
than that of the fan 500 under a condition that the compressor 300 operates for refrigerating) so as to accelerate
the heat exchange, shorten the defrosting time, and reduce the temperature increment.
[0062] In an embodiment of the present invention, during defrosting, with the increment of the temperature detected by the defrosting sensor 410, the controller 800
may reduce the rotation speed of the fan 500 gradually,
or may even stop the fan 500.
[0063] Fig. 6 is a flow chart illustrating the control method of the refrigerator in the auxiliary defrosting mode according to embodiments of the present invention.
[0064] As shown in Fig. 6, the control method of the
refrigerator in the auxiliary defrosting mode comprises
steps of:
S601, operating the compressor 300 and the fan
500.
S602, detecting if the temperature of the refrigeration
chamber 130 reaches the second temperature Trt.
S603, if the temperature of the refrigeration chamber
130 does, stopping the compressor 300; if the temperature of the refrigeration chamber 130 does not,
returning back to Step S601.
S604, continuously operating the fan 500.
S605, detecting if the temperature of the evaporator
400 reaches the third temperature (Trq).
S606, if the temperature of the evaporator 400 does,
stopping the auxiliary defrosting; if the temperature
of the evaporator 400 does not, returning back to
Step S604.
[0065] In embodiments of the present invention, when
the refrigerator is operated in an extreme environment,
such as an environment with high temperature and high
humidity, more frost may be formed on the surface of the
evaporator 400, so that an auxiliary defrosting may be
performed in the predetermined number of ON-OFF cycles of the compressor, besides the defrosting performed
in each operation cycle. The auxiliary defrosting may be
operated in each OFF period of the compressor 300 (i.e.
the compressor 300 stops during this OFF period) of the
predetermined number of ON-OFF cycles or after a plurality of ON-OFF cycles. The refrigerator according to
embodiments of the present invention can defrost more
frost and the defrosting time is reduced.
[0066] In an embodiment of the present invention,
when the temperature of the evaporator 400 reaches the
third temperature (Trq), the fan 500 may stop. Therefore,
before the next operation cycle (T) starts, the fan 500
may operate continuously, and may stop for a period of
time during the compressor 300 stopping.
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[0067] In an embodiment of the present invention, the
first temperature (Trd) is higher than the third temperature (Trq).
[0068] More specifically, the first temperature (Trd) is
5 °C and the third temperature (Trq) is 3 °C, so that the
fan 500 may stop for a period of time in each of the ONOFF cycles (t0), so as to increase a life time thereof.
[0069] In an embodiment of the present invention, the
controller 800 increases the speed of the fan 500, after
the compressor 300 operates for the predetermined
number of ON-OFF cycles (t0), or when the temperature
of the refrigeration chamber 130 reaches the second temperature (Trt).
[0070] With the control method according to embodiments of the present invention, at the beginning of defrosting, the speed of the fan 500 is increased (the increased speed of the fan 500 is higher than that of the
fan under a condition that the compressor 300 operates
for refrigerating) so as to accelerate the heat exchange,
shorten the defrosting time, and reduce the temperature
increment.
[0071] In an embodiment of the present invention, during defrosting, with the increment of the temperature detected by the defrosting sensor 410, the controller 800
may reduce the rotation speed of the fan 500 gradually,
or even may stop the fan 500.
[0072] Reference throughout this specification to "an
embodiment," "some embodiments," "one embodiment",
"another example," "an example," "a specific example,"
or "some examples," means that a particular feature,
structure, material, or characteristic described in connection with the embodiment or example is included in at
least one embodiment or example of the present invention. Thus, the appearances of the phrases such as "in
some embodiments," "in one embodiment", "in an embodiment", "in another example," "in an example," "in a
specific example," or "in some examples," in various places throughout this specification are not necessarily referring to the same embodiment or example of the
present invention. Furthermore, the particular features,
structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0073] Although explanatory embodiments have been
shown and described, it would be appreciated by those
skilled in the art that the above embodiments can not be
construed to limit the present invention, and changes,
alternatives, and modifications can be made in the embodiments without departing from spirit, principles and
scope of the present invention.
Claims
55
1.
A refrigerator having defrosting function, comprising:
a cabinet (100),
an air channel plate (120) disposed in the cab-
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inet to define a refrigeration chamber (130) and
an air channel (140) between the air channel
plate (120) and a rear wall of the cabinet within
the cabinet,
a door (200),
an evaporator (400) mounted in the air channel,
a defrosting sensor (410) disposed on the evaporator to detect a temperature of the evaporator,
a compressor (300) coupled with the evaporator,
a fan (500) disposed in the air channel for circulating air between the air channel (140) and the
refrigeration chamber (130), and
a controller (800) coupled with the defrosting
sensor (410), the compressor (300) and the fan
(500) respectively, wherein after the compressor (300) operates for a predetermined number
of ON-OFF cycles each time, the controller (800)
controls the compressor (300) to stop and controls the fan (500) to continuously operate until
a temperature detected by the defrosting sensor
(410) reaching a first temperature.
2.
The refrigerator according to claim 1, further comprises:
a temperature sensor (131) disposed in the refrigeration chamber (130) to detect a temperature of the refrigeration chamber (130) and coupled with the controller (800),
wherein during the predetermined number of
ON-OFF cycles, when the temperature detected
by the temperature sensor (131) reaches a second temperature, the controller (800) controls
the compressor (300) to stop and controls the
fan (500) to continuously operate until the temperature detected by the defrosting sensor (410)
reaches a third temperature,
wherein the first temperature is higher than or
equal to the third temperature.
3.
The refrigerator according to claim 1 or 2, wherein
the first temperature is 3 °C to 5 °C.
4.
The refrigerator according to claim 2 or 3, wherein
during the predetermined number of ON-OFF cycles, when the temperature detected by the defrosting sensor (410) reaches the third temperature, the
controller (800) controls the fan (500) to stop.
5.
The refrigerator according to any one of claims 1-4,
wherein after the compressor (300) operates for the
predetermined number of ON-OFF cycles or when
the temperature detected by the temperature sensor
(131) reaches the second temperature, the controller
(800) controls the fan (500) to increase an speed.
function, comprising steps of:
detecting if a compressor (300) of the refrigerator operates for a predetermined number of ONOFF cycles, and
after the compressor (300) operates for a predetermined number of ON-OFF cycles each
time, stopping the compressor (300) and continuously operating a fan (500) of the refrigerator
until a temperature of an evaporator (400) of the
refrigerator reaching a first temperature, so as
to defrost the evaporator (400) disposed in an
air channel (140) of the refrigerator.
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7.
The control method according to claim 6, further
comprises the step of:
during the predetermined number of ON-OFF
cycles, when a temperature of a refrigeration
chamber (130) of the refrigerator reaches a second temperature, stopping the compressor
(300) and continuously operating the fan (500)
until the temperature of the evaporator (400)
reaches a third temperature,
wherein the first temperature is higher than or
equal to the third temperature.
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8.
The control method according to claim 6 or 7, wherein the first temperature is 3°C to 5°C.
9.
The control method according to claim 7 or 8, wherein during the predetermined number of ON-OFF cycles, when the temperature of the evaporator (400)
reaches the third temperature, the fan (500) stops
operating.
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A control method of a refrigerator having defrosting
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10. The control method according to any one of claims
6-9, wherein after the compressor (300) operates for
the predetermined number of ON-OFF cycles or
when the temperature of the refrigeration chamber
(130) reaches the second temperature, an speed of
the fan (500) is increased.
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