U.S. patent application number 15/578929 was filed with the patent office on 2018-06-21 for washing machine with steam washing function and control method.
This patent application is currently assigned to QINGDAO HAIER DRUM WASHING MACHINE CO., LTD.. The applicant listed for this patent is QINGDAO HAIER DRUM WASHING MACHINE CO., LTD.. Invention is credited to Jinzhu DENG, Xizhan GONG, Yuliang JIANG, Sheng XU, Wenbing XU.
Application Number | 20180171528 15/578929 |
Document ID | / |
Family ID | 57439941 |
Filed Date | 2018-06-21 |
United States Patent
Application |
20180171528 |
Kind Code |
A1 |
XU; Sheng ; et al. |
June 21, 2018 |
WASHING MACHINE WITH STEAM WASHING FUNCTION AND CONTROL METHOD
Abstract
A washing machine with a steam washing function and a control
method are provided. The washing machine includes an outer drum,
wherein a heater is arranged inside the outer drum; the washing
machine further includes a spray thrower used for spraying water to
the heater, and the heater heats and vaporizes the water sprayed
onto the surface to form high-temperature steam. When the heater is
provided with a spray thrower which sprays water to the heater, the
heater in a heating state can rapidly heat and vaporize the sprayed
water to form a large amount of steam, then the steam generated in
the outer drum can be utilized to heat and wet the clothes in the
inner drum, such that the washing machine has the functions of
steam washing, clothes drying, sterilization and disinfection,
deodorization and ironing.
Inventors: |
XU; Sheng; (Qingdao,
Shandong, CN) ; JIANG; Yuliang; (Qingdao, Shandong,
CN) ; XU; Wenbing; (Qingdao, Shandong, CN) ;
DENG; Jinzhu; (Qingdao, Shandong, CN) ; GONG;
Xizhan; (Qingdao, Shandong, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
QINGDAO HAIER DRUM WASHING MACHINE CO., LTD. |
Qingdao, Shandong |
|
CN |
|
|
Assignee: |
QINGDAO HAIER DRUM WASHING MACHINE
CO., LTD.
Qingdao, Shandong
CN
|
Family ID: |
57439941 |
Appl. No.: |
15/578929 |
Filed: |
November 23, 2015 |
PCT Filed: |
November 23, 2015 |
PCT NO: |
PCT/CN2015/095304 |
371 Date: |
December 1, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
D06F 35/006 20130101;
D06F 2204/04 20130101; D06F 39/04 20130101; D06F 33/00 20130101;
D06F 39/008 20130101 |
International
Class: |
D06F 39/00 20060101
D06F039/00; D06F 33/02 20060101 D06F033/02; D06F 35/00 20060101
D06F035/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 2, 2015 |
CN |
201510295303.5 |
Claims
1. A washing machine with a steam washing function, comprising an
outer drum, a heater being arranged inside the outer drum, wherein
the washing machine further comprises a spray thrower for spraying
water to the heater, the heater vaporizes the water sprayed to a
surface of the heater by heating to generate high-temperature
steam.
2. The washing machine according to claim 1, wherein the spray
thrower and the heater are arranged jointly or at a distance, a
corresponding side to the heater of the spray thrower is
distributed with multiple spray holes for spraying water to the
heater; the spray thrower is constituted by a pipeline which is of
a same shape as the heater, and the spray holes are distributed at
intervals along an axial direction of the pipeline.
3. The washing machine according to claim 1, wherein the heater is
capable of heating air or respectively heating water and air.
4. The washing machine according to claim 1, wherein the heater is
arranged at a bottom of the outer drum, and the spray thrower is
arranged above the heater.
5. The washing machine according to claim 1, wherein the spray
thrower is communicated with a water inlet structure of the washing
machine via a connecting pipe, and the connecting pipe is provided
with a control valve for controlling a flow rate of the sprayed
water.
6. A control method of a washing machine with a steam washing
function, comprising, spraying water to a heater in an outer drum,
the heater vaporizing the sprayed water by heating, generating
vaporized steam in the outer drum, and the steam heating and
wetting clothes in an inner drum.
7. The control method according to claim 6, wherein before the
washing machine executes a normal washing procedure, firstly water
is sprayed to the heater which is in a heating state, then
high-temperature steam is generated in the outer drum, after the
clothes are heated and wetted for a certain time, then the washing
machine executes the normal washing procedure.
8. The control method according to claim 6, wherein in a process of
spraying water to the heater and generating high-temperature steam,
the inner drum rotates simultaneously at a certain rotation halt
ratio.
9. The control method according to claim 6, wherein in the process
of spraying water to the heater and generating high-temperature
steam, the heater stops working for a time t2 after working for a
time t1.
10. The control method according to claim 6, wherein in the process
of spraying water to the heater and generating high-temperature
steam, a water inlet pipe and a water outlet pipe of the outer drum
are both in a disconnected state, to enable the high-temperature
steam to be filled into an airtight inner space of the outer
drum.
11. The control method according to claim 6, wherein before water
is sprayed to the heater, water is filled into the outer drum
firstly, and a height of an inlet water level is lower than the
heater.
12. The washing machine according to claim 2, wherein the heater is
capable of heating air or respectively heating water and air.
13. The washing machine according to claim 2, wherein the heater is
arranged at a bottom of the outer drum, and the spray thrower is
arranged above the heater.
14. The washing machine according to claim 3, wherein the heater is
arranged at a bottom of the outer drum, and the spray thrower is
arranged above the heater.
15. The washing machine according to claim 2, wherein the spray
thrower is communicated with a water inlet structure of the washing
machine via a connecting pipe, and the connecting pipe is provided
with a control valve for controlling a flow rate of the sprayed
water.
16. The washing machine according to claim 3, wherein the spray
thrower is communicated with a water inlet structure of the washing
machine via a connecting pipe, and the connecting pipe is provided
with a control valve for controlling a flow rate of the sprayed
water.
17. The control method according to claim 7, wherein in a process
of spraying water to the heater and generating high-temperature
steam, the inner drum rotates simultaneously at a certain rotation
halt ratio.
18. The control method according to claim 7, wherein in the process
of spraying water to the heater and generating high-temperature
steam, the heater stops working for a time t2 after working for a
time t1.
19. The control method according to claim 7, wherein in the process
of spraying water to the heater and generating high-temperature
steam, a water inlet pipe and a water outlet pipe of the outer drum
are both in a disconnected state, to enable the high-temperature
steam to be filled into an airtight inner space of the outer
drum.
20. The control method according to claim 7, wherein before water
is sprayed to the heater, water is filled into the outer drum
firstly, and a height of an inlet water level is lower than the
heater.
Description
TECHNICAL FIELD
[0001] The present disclosure relates to a washing machine in a
washing field, and in particular to a washing machine with a steam
washing function, and relates to a control method of the above
washing machine.
BACKGROUND ART
[0002] To cater to the demands of consumers, additional functions
of the washing machine emerge endlessly, such as the functions
including steam washing, sterilization and deodorization. In the
existing washing machine products, the function of steam washing is
realized in the following two manners:
[0003] In the first manner, the heater in the outer drum of a
washing machine is immersed into the washing water of an outer
drum, and the washing water is heated so as to generate steam.
However, for the washing machine which adopts this manner, since
the washing water in the outer drum is large in quantities, the
heating efficiency is relatively slow, therefore, the generated
steam is small in quantity and the effect is not ideal.
[0004] In the second manner, a special steam generator is
additionally arranged on the washing machine, after water is
vaporized into high-temperature steam in a generator, then the
steam flows into the outer drum, so as to realize the functions of
rapid washing, sterilization and deodorization of clothes.
[0005] The Chinese patent with the application number of
CN200510083626 introduces a steam generation device of a washing
machine. The steam generation device includes a shell of an
accommodation space for storing water, and a heater which is
arranged in the shell for heating the water stored in the shell.
Through additionally arranging a separate steam generation device
on the washing machine, then water can be utilized to generate
steam, and steam can flow into the outer drum of the washing
machine, so as to realize the aim of performing high-temperature
disinfection on the clothes in the inner drum by utilizing the
steam.
[0006] In the above scheme in which a steam generator is separately
and additionally arranged on a washing machine, although the
generated steam is large in quantity, and the effects of cleaning
and disinfection of clothes are favorable. However, since a
separate steam generator needs to be additionally arranged, the
production cost of the washing machine is increased; meanwhile, the
separately arranged steam generator also occupies the inside space
of the washing machine, such that the overall size of the washing
machine becomes large, and the volume of the inner drum becomes
small.
[0007] In view of this, the present disclosure is hereby
proposed.
SUMMARY OF THE DISCLOSURE
[0008] The technical problem to be solved by the present disclosure
is to overcome the shortcomings in the prior art, provide a washing
machine with a steam washing function, so as to realize the aim of
generating steam in the outer drum to perform high-temperature
disinfection and rapid wetting on clothes. And another aim is to
utilize the heater in the outer drum to rapidly generate a large
amount of steam.
[0009] To solve the above technical problem, the basic concept of
the technical solution adopted in the present disclosure is as
follows: A washing machine with a steam washing function includes
an outer drum, wherein a heater is arranged inside the outer drum,
and the washing machine further includes a spray thrower used for
spraying water to the heater, wherein the heater heats to vaporize
the water sprayed onto the surface to form high-temperature
steam.
[0010] Furthermore, the spray thrower and the heater are
correspondingly arranged jointly or at a distance, the
corresponding side of the spray thrower is distributed with
multiple spray holes used for spraying water to the heater.
[0011] Furthermore, the heater is able to heat air or respectively
heat water and air. Preferably, the heater is a heater which heats
the washing water in the existing washing machine.
[0012] Furthermore, the spray thrower is constituted by a pipe
which is of the same shape as the heater, and the spray holes are
distributed at intervals along the axial direction of the
pipeline
[0013] Furthermore, the heater and the spray thrower are both
arranged between the outer drum and the inner drum of the washing
machine. The heater is arranged at the bottom of the outer drum,
and the spray thrower is arranged at the corresponding upper side
of the heater. Preferably, the bottom of the outer drum is provided
with a groove which sinks downwards, and the heater and the spray
thrower are both arranged in the groove.
[0014] Furthermore, the spray thrower is communicated with a water
inlet structure of the washing machine via a connecting pipe, and
the connecting pipe is provided with a control valve used for
controlling the flow rate of the sprayed water.
[0015] Preferably, the two ends of the pipe which constitute the
spray thrower are both communicated with the connecting pipe via a
three-way valve, such that water can be fed into the spray thrower
in two directions simultaneously, so as to improve the spraying
efficiency.
[0016] Another objective of the present disclosure is to provide a
control method of a washing machine of any of the above items,
wherein the heater in the outer drum is heated for vaporization, so
that vaporized steam is generated in the outer drum, and the steam
heats and wets the clothes in the inner drum.
[0017] Furthermore, the heater needs to be powered on first to
enable it to be in a heating state, the spray thrower then sprays
water to the heater, so as to avoid inability of the heater in a
non-heating state in timely vaporization of the sprayed water, and
avoid water accumulation in the outer drum.
[0018] Before the washing machine executes normal washing
procedure, firstly water is sprayed to the heater which is in a
heating state, then high-temperature steam is generated in the
outer drum, after the clothes are heated and wetted for a certain
time, the execution of normal washing procedure then begins. The
normal washing procedure includes one or the combination of the
steps of water intaking, washing, rinsing, dehydration and drying.
Therefore, the clothes are firstly rapidly wetted by steam and
disinfected by high temperature, and then normal washing begins, so
as to improve the washing efficiency of clothes.
[0019] Furthermore, in the process of spraying water to the heater
to form high-temperature steam, the inner drum rotates
simultaneously at a certain rotation halt ratio, so as to increase
the contact area between clothes and steam.
[0020] Furthermore, in the process of spraying water to the heater
to form high-temperature steam, the heater needs to stop working
for a certain time t2 after working for a certain time t1, so as to
avoid dry burning caused by overheated heater. Preferably, t1 is
20s, and t2 is 20s.
[0021] Furthermore, in the process of spraying water to the heater
to form high-temperature steam, the water inlet pipe and water
outlet pipe of the outer drum are both in a disconnected state, to
enable the high-temperature steam to be filled into the airtight
inner space of the outer drum.
[0022] Furthermore, before water is sprayed to the heater, water is
firstly filled into the outer drum, and the height of the water
inlet level is lower than the heater, so as to avoid burning loss
of the bottom of a washing machine caused by the overheated
heater.
[0023] After the above technical solution is adopted, the present
disclosure has the following beneficial effects compared with the
prior art.
[0024] 1. A spray thrower which sprays water to the heater is
arranged at the heater, to enable the heater to rapidly heat and
vaporize the sprayed water to form a large amount of steam, the aim
of generating steam in the outer drum is realized. And the washing
machine has the functions of steam washing, clothes drying,
sterilization and disinfection, deodorization and ironing, and the
effect is dramatic.
[0025] 2. Through the above setting, the heater has double effects
of heating the washing water in the outer drum and rapidly
generating a large amount of steam, then the addition of special
steam generation device is avoided, thereby not only reducing the
cost of the washing machine, but also reducing the power
consumption of the washing machine.
[0026] 3. The heater is arranged at the bottom of the outer drum,
by utilizing the principle that hot air rises up, the generated
steam is filled into the whole area of the airtight outer drum,
such that clothes can be in full contact with steam. In addition,
when the outer drum is filled with steam, the inner drum is
rotated, such that clothes can roll over to increase the contact
area of clothes and steam and improve the washing efficiency.
[0027] 4. Also, the present disclosure is simple in structure,
concise in method, dramatic in effect, and suitable for
popularization and use.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] FIG. 1 is a structural schematic diagram of the washing
machine in the embodiment of the present disclosure;
[0029] FIG. 2 is a structural schematic diagram of an outer drum in
the embodiment of the present disclosure;
[0030] FIG. 3 is a structural schematic diagram of the A-A section
in FIG. 2;
[0031] FIG. 4 is a structural schematic diagram of the spray
browser in the embodiment of the present disclosure;
[0032] FIG. 5 is an explosive structural schematic diagram of the
spray thrower and the heater in the embodiment of the present
disclosure;
[0033] Reference numerals of major elements: 1--outer drum,
2--inner drum, 3--heater, 4--spray thrower, 5--connecting pipe,
6--water inlet structure, 7--spray hole, 8--groove, 9--three-way
valve, 10--water inlet pump, 11--drainage pump, 12--water inlet
pipe, 13--water outlet pipe, 14--control valve, 40--pipeline.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0034] The specific implementation of the present disclosure will
be described in detail below in combination with the accompanying
drawings.
[0035] As shown in FIG. 1 to FIG. 5, the embodiment of the present
disclosure introduces a washing machine with a steam washing
function which includes an outer drum (1) and an inner drum (2),
and a heater (3) is arranged between the outer drum (1) and the
inner drum (2). The heater (3) heats the washing water which flows
into the outer drum (1) so as to improve the temperature of the
washing water. The washing machine further includes a spray thrower
(4) used for spraying water to the heater (3), the heater (3) heats
and vaporizes the water sprayed onto the surface to form
high-temperature steam, and the steam heats and wets the clothes in
the inner drum (2).
[0036] When the heater (3) is provided with a spray thrower (4)
which sprays water to the heater (3), then the heater (3) is able
to rapidly heat and vaporize the sprayed water to form a large
amount of steam, then the steam generated in the outer drum (1) can
be utilized to heat and wet the clothes in the inner drum (2), such
that the washing machine has the functions of steam washing,
clothes drying, sterilization and disinfection, deodorization and
ironing, and the effect is dramatic. Meanwhile, the heater (3) has
double effects of heating the washing water in the outer drum (1)
and rapidly generating a large amount of steam, then the addition
of special steam generation device is avoided, thereby not only
reducing the cost of the washing machine, but also reducing the
power consumption of the washing machine.
Embodiment 1
[0037] As shown in FIG. 1 to FIG. 4, in the present embodiment, the
spray thrower (4) and the heater (3) are correspondingly arranged
jointly or at a distance, the corresponding side of the spray
thrower (4) is distributed with multiple spray holes (7) used for
spraying water to the heater (3). Preferably, the spray thrower (4)
and the heater (3) are spaced by a certain distance in order to
improve the cover area of the spray holes (7). Meanwhile, the
distance between adjacent spray holes (7) is made to be smaller
than the diameter of the area covered by the sprayed water, such
that each part of the heater (3) can be in contact with the sprayed
water, so as to improve the generation efficiency of steam.
[0038] As shown in FIG. 4 and FIG. 5, in the present embodiment,
the heater (3) is constituted by multiple heating pipes which are
spirally arranged in an S shape; the spray thrower (4) is
constituted by the pipeline (40) which is of the same shape as the
heater (3), and multiple spray holes (7) which spray water to the
heater (3) are distributed on the pipeline (40) at intervals along
the axial direction. The sprayer thrower and the heater are
arranged to be in the same shape, so as to enlarge the cover area
of the sprayed water flow on the heater, improve the generation
efficiency of the steam, and avoid the dead angles existing in the
heater and inability of complete coverage of the sprayed water
flow.
[0039] As shown in FIG. 4, in the present embodiment, the two ends
of the pipeline (40) constituting the spray thrower (4) are both
connected with the connecting pipe (5) via the same three-way valve
(9). The connecting pipe (5) is communicated with the water inlet
structure (6) of the washing machine, such that the water flow can
enter via the two ends of the pipeline (40) simultaneously. So as
to reduce the length of the flow path of the water flow, enable the
water outlet pressure of each spray hole (7) to be relatively
balanced, and achieve the aim of improving the water spraying
stability of the sprayer and accelerate the generation rate of the
steam.
[0040] In the present embodiment, the connecting pipe (5) is
provided with a control valve (14) for controlling the water flow,
so as to adjust the water inlet flow of the spray thrower and
achieve the aim of indirectly adjusting the area covered by the
sprayed water flow.
Embodiment 2
[0041] As shown in FIG. 1, in the present embodiment, the heater
(3) and the spray thrower (4) are both arranged between the outer
drum (1) and the inner drum (2), the steam generated at the heater
(3) can flow into the space inside the inner drum (2) via a
dehydration hole arranged on the inner drum (2), so as to perform
steam washing, sterilization and disinfection, deodorization and
the like on the clothes in the inner drum (2).
[0042] As shown in FIG. 2 and FIG. 3, in the present embodiment,
the heater (3) is arranged at the bottom of the outer drum (1), the
spray thrower (4) is arranged at the corresponding upper side of
the heater (3), and the spray holes (7) are arranged on the lower
surface of the spray thrower (4). The steam will move upwards in
the outer drum (1) due to its low density, and the heater (3) is
arranged at the bottom of the outer drum (1), such that the steam
generated in the outer drum (1) is uniformly distributed inside the
outer drum (1), and the clothes can be in full contact with the
steam.
[0043] As shown in FIG. 1, in the present embodiment, the outer
drum (1) is communicated with the water inlet structure (6) via a
water inlet pipe (12), and is communicated with the outside of the
washing machine via a water outlet pipe (13). The water inlet pipe
(12) is provided with a water inlet pump (10) used for controlling
the on/off of the pipeline, and the water outlet pipe (13) is
provided with a drainage pump (11) used for controlling the channel
of the pipe. When the spray thrower (4) sprays water to the heater
(3), the water inlet pump (10) and the drainage pump (11) are both
turned off, then the inner space of the outer drum (1) is closed,
such that the generated steam can be filled into the outer drum
uniformly, and external flow of the steam is avoided. Preferably,
as shown in FIG. 1 to FIG. 3, the bottom of the outer drum (1) is
provided with a groove (8) which sinks downwards, and the heater
(3) and the spray thrower (4) are both arranged in the groove (8).
Thus, a certain interval is arranged between the heater (3) and the
inner drum (2) and between the spray thrower (4) and the inner drum
(2), thereby avoiding mutual contact friction. And in the working
process of the washing machine, the shake of the inner drum (2)
will not collide with the heater (3) and the spray thrower (4) in
the groove (8), so as to reduce the probability of fault of the
spray thrower and the heater.
Embodiment 3
[0044] In the present embodiment, the washing machine has a
corresponding process of generating high-temperature steam, and the
process specifically includes the following steps:
[0045] 1) the water inlet pipe and the water outlet pipe of the
outer drum are disconnected, so that the inner space of the outer
drum is arranged to be airtight;
[0046] 2) the washing machine fills water to the spray thrower, the
spray thrower sprays water to the heater, and the heater begins to
work to generate high-temperature steam, so as to enable the steam
to be filled in the airtight inner space of the outer drum;
[0047] 3) when step 2) is executed, the inner drum rotates at a
certain rotation halt ratio.
[0048] Through the above method, the inner space of the outer drum
can be rapidly and uniformly filled with steam, and steam can be
utilized to heat and wet the clothes, such that the washing machine
has the functions of steam washing, clothes drying, sterilization
and disinfection, deodorization and ironing, and the effect is
dramatic.
[0049] In the present embodiment, the above steps 1) to 3) can be
combined with the normal washing procedures of the existing washing
machine, so as to improve the cleanliness of clothes and enrich the
selection of users, and the specific mode is as follows:
[0050] 10) Placing clothes into a washing machine and starting the
washing machine;
[0051] 20) Executing the above steps 1) to 3) by the washing
machine firstly, so as to heat and wet the clothes for a certain
time;
[0052] 30) Executing the normal washing procedure which is selected
by users and/or automatically determined by the washing machine,
wherein the procedure includes one or the combination of the steps
of water intaking, washing, rinsing, dehydration and drying.
[0053] Therefore, besides the function of normal washing of
clothes, the washing machine further has the functions of steam
washing, clothes drying, sterilization and disinfection,
deodorization and ironing, and the satisfaction degree of users is
improved. Meanwhile, the washing machine can be set, so as to
execute step 20) in selected or specific judgment conditions, in
other conditions, step 20) will be skipped and normal washing
procedures are directly executed.
Embodiment 4
[0054] In the present embodiment, in step 2) of the above
embodiment 3, in order to avoid dry heating when the heater is
overheated, the heater needs to stop working for a certain time t2
after working for a certain time t1; preferably, t1 is 20s, and t2
is 20s. Therefore, the temperature of the heater will not be too
high, so as to protect the heater, and avoid loss due to dry
heating.
[0055] In the present embodiment, when the heater is an electric
heating device, power up and power down need to be performed on the
heater alternately, then the above overheating protection procedure
of the heater will be realized.
[0056] In the present embodiment, in the working time period of the
above heater, the heater utilizes the heat generated by itself to
heat and vaporize the sprayed water to form high-temperature steam.
While in the time period in which the heater stops working, the
heater utilizes its own waste heat to heat and vaporize the sprayed
water to form high-temperature steam, and the sprayed water reduces
the temperature of the heater. Through the above manner, on the one
hand, the temperature of the heater itself will not be too high,
thereby avoiding dry heating and damage; on the other hand, the
conditions of untimely heating of the sprayed water and water
accumulation in the outer drum will be avoided.
Embodiment 5
[0057] In the present embodiment, the following difference exists
compared with the above embodiment 3 and embodiment 4: before water
is sprayed to the heater, water is firstly filled into the outer
drum, and the height of the water inlet level is lower than the
heater.
[0058] In the present embodiment, the specific steps of generating
the high-temperature steam by the washing machine are as
follows:
[0059] 21) a certain amount of water is filled into the outer drum,
and the water inlet level needs to be lower than the height of the
heating pipe;
[0060] 22) the water inlet pipe and the water outlet pipe of the
outer drum are disconnected, such that the inner space of the outer
drum is arranged to be airtight;
[0061] 23) the washing machine fills water into the spray thrower,
the spray thrower sprays water to the heater, the heater begins to
work to generate high-temperature steam, to enable the steam to be
filled in the airtight inner space of the outer drum;
[0062] 24) while step 23) is executed, the inner drum rotates at a
certain rotation halt ratio.
[0063] Before the heater is sprayed with water to generate steam, a
certain amount of water is filled into the outer drum to protect
the bottom of the outer drum of the washing machine. Thus, it
avoids burning loss of the bottom of the outer drum in a washing
machine caused by the overheated heater due to misoperation.
[0064] In the present embodiment, in order the realize that the
height of the water level of intake water is lower than the heater
before water spraying, a certain distance is arranged between the
heater and the bottom of the outer drum; or the heater is arranged
at the bottom of the outer drum, and a water outlet is arranged at
the bottom of the outer drum, such that the inlet water before
water spraying flows into the drainage pipe (the part between the
water outlet and the drain valve), then the aim that the water
inlet height is lower than the heater can also be realized.
[0065] Also, in the present embodiment, in the process of executing
the above step 23), the heater will stop working for a certain time
t2 after working for a certain time t1; preferably, t1 is 20s and
t2 is 20s. Therefore, the temperature of the heater will not be too
high, so as to protect the heater, and avoid loss due to dry
heating.
[0066] The implementation schemes in the above embodiments can be
further combined or substituted, and the embodiments merely
describe the preferred embodiments of the present disclosure,
rather than limiting the concept and range of the present
disclosure, under the premise of not departing from the design
concept of the present disclosure, various changes and improvements
made to the technical solution of the present disclosure by those
of ordinary skill in the art shall all fall within the protection
scope of the present disclosure.
* * * * *