CN117404858A - Refrigerator and heating control method for water injection pipe of ice maker - Google Patents
Refrigerator and heating control method for water injection pipe of ice maker Download PDFInfo
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- CN117404858A CN117404858A CN202210795459.XA CN202210795459A CN117404858A CN 117404858 A CN117404858 A CN 117404858A CN 202210795459 A CN202210795459 A CN 202210795459A CN 117404858 A CN117404858 A CN 117404858A
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- heating wire
- duty ratio
- preset temperature
- working time
- power supply
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 191
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 170
- 238000002347 injection Methods 0.000 title claims abstract description 114
- 239000007924 injection Substances 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000007710 freezing Methods 0.000 claims abstract description 49
- 230000008014 freezing Effects 0.000 claims abstract description 49
- 230000001276 controlling effect Effects 0.000 claims description 62
- 230000001105 regulatory effect Effects 0.000 claims description 36
- 238000010586 diagram Methods 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 9
- 238000009833 condensation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005494 condensation Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/04—Preventing the formation of frost or condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C2400/00—Auxiliary features or devices for producing, working or handling ice
- F25C2400/14—Water supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Production, Working, Storing, Or Distribution Of Ice (AREA)
Abstract
The invention discloses a refrigerator and a heating control method of a water injection pipe of an ice maker of the refrigerator, wherein the refrigerator comprises the following components: the refrigerator comprises a refrigerator body, a refrigerating chamber and a freezing chamber, wherein the refrigerator body is used as a supporting structure of the refrigerator; the ice maker is arranged in the freezing chamber and comprises a water injection pipe and an ice making box, a water inlet of the water injection pipe is connected with a water source, a water outlet of the water injection pipe is used for injecting water into the ice making box, and at least one part of the outer wall of the water injection pipe is wrapped with a heating wire; the controller is configured to obtain an actual temperature of the freezer compartment; according to the relation between the actual temperature and a preset temperature interval, adjusting the power supply voltage of the heating wire; and adjusting the working time duty ratio of the heating wire according to the relation between the actual temperature and the subinterval in the preset temperature interval. According to the invention, the power supply voltage and the working time duty ratio of the heating wire of the water injection pipe can be adjusted in real time according to the actual temperature of the freezing chamber, so that the temperature of the water outlet of the water injection pipe is maintained within the target temperature range.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to a heating control method of a water injection pipe of an ice maker of a refrigerator.
Background
The automatic ice maker is installed inside the freezing chamber, the water source for making ice is located inside the refrigerating chamber or from outside tap water pipeline, and the water source is filled into the ice maker through the water injection pipe of the ice maker, and the water outlet of the water injection pipe is located above the ice maker in the freezing chamber. The temperature of the freezing chamber is generally between minus 10 ℃ and minus 30 ℃, after the water injection pipe is used for injecting water into the ice machine, residual water or water drops at the pipe orifice inside the water injection pipe are easy to form ice beads, and the ice beads are accumulated to a small extent to finally cause the ice blockage of the water injection pipe. Therefore, in order to prevent the water injection pipe from being blocked by ice, the water injection pipe is generally wrapped with a heating wire with a certain shape and a certain power and works according to a certain control rule.
The control method of the water injection pipe heating wire of the ice maker for the refrigerator in the current market generally comprises the following steps: (1) continuously heating all the time; (2) The working modes are respectively set according to the on/off state of the ice making function of the refrigerator, namely, the heating wire works when the ice making function of the refrigerator is started, and the heating wire stops working when the ice making function of the refrigerator is closed, as shown in fig. 1, and fig. 1 is a heating control method of a water injection pipe of an ice making machine of the refrigerator in the prior art. However, the control method has the following problems: when the temperature of the freezing chamber is too low, the residual water in the water injection pipe may not be prevented from freezing because the power of the heater is fixed; when the refrigerator is not cooled or the temperature of the freezing chamber is too high, the temperature of the water injection pipe is too high, adverse effects are caused on the water injection pipe and plastic parts around the water injection pipe, and the reliability of products is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heating control method for a water injection pipe of a refrigerator and an ice machine of the refrigerator, wherein the power supply voltage and the working time duty ratio of a heating wire of the water injection pipe can be adjusted in real time according to the actual temperature of a freezing chamber so as to maintain the temperature of a water outlet of the water injection pipe within a target temperature range.
A first embodiment of the present invention provides a refrigerator including:
the refrigerator comprises a refrigerator body, a refrigerating chamber and a freezing chamber, wherein the refrigerator body is used as a supporting structure of the refrigerator;
the ice maker is arranged in the freezing chamber and comprises a water injection pipe and an ice making box, a water inlet of the water injection pipe is connected with a water source, a water outlet of the water injection pipe is used for injecting water into the ice making box, and at least one part of the outer wall of the water injection pipe is wrapped with a heating wire;
the controller is configured to obtain an actual temperature of the freezer compartment; according to the relation between the actual temperature and a preset temperature interval, adjusting the power supply voltage of the heating wire; and adjusting the working time duty ratio of the heating wire according to the relation between the actual temperature and the subinterval in the preset temperature interval so as to maintain the temperature of the water outlet of the water injection pipe within a target temperature range.
In the refrigerator provided by the second embodiment of the present invention, the adjusting the power supply voltage of the heating wire according to the relation between the actual temperature and the preset temperature interval specifically includes:
if the actual temperature is in a first preset temperature interval, controlling the power supply voltage of the heating wire to be the maximum power supply voltage;
if the actual temperature is in a second preset temperature interval, controlling the power supply voltage of the heating wire to be an intermediate power supply voltage;
if the actual temperature is in a third preset temperature interval, controlling the power supply voltage of the heating wire to be the minimum power supply voltage;
the maximum value of the first preset temperature interval is equal to the minimum value of the second preset temperature interval, and the maximum value of the second preset temperature interval is equal to the minimum value of the third preset temperature interval.
In the refrigerator provided by the third embodiment of the present invention, the adjusting the duty ratio of the heating wire according to the relationship between the actual temperature and the subinterval in the preset temperature interval specifically includes:
if the actual temperature is in a first subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a first working time duty ratio;
if the actual temperature is in a second subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a second working time duty ratio;
if the actual temperature is in a third subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a third working time duty ratio;
if the actual temperature is in a fourth subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a fourth working time duty ratio;
if the actual temperature is in a fifth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a fifth working time duty ratio;
if the actual temperature is in a sixth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a sixth working time duty ratio;
wherein the first duty cycle > the second duty cycle > the third duty cycle > the fourth duty cycle > the fifth duty cycle > the sixth duty cycle.
In the refrigerator provided by the fourth embodiment of the present invention, the duty ratio is:
wherein Don is the duty ratio of the working time, don_min is not less than don_max, don_max=100%; t is the duty cycle of the heating wire, t=ton+toff, ton is the power supply time of the power supply voltage to the heating wire in the T time, and Toff is the time when the power supply voltage stops supplying power to the heating wire in the T time.
In the refrigerator provided by the fifth embodiment of the invention, the controller comprises an MCU control module and a voltage regulating module, wherein the MCU control module is connected with the voltage regulating module, and the MCU control module outputs PWM waveforms to regulate the output voltage of the voltage regulating module, so that the voltage regulating module outputs variable power supply voltage Uz, uz_min is less than or equal to Uz and less than or equal to Uz_max; the MCU control module also adjusts the duty ratio of the heating wire.
In a heating control method of a water injection pipe of an ice maker of a refrigerator provided by a sixth embodiment of the present invention, the heating control method is applied to a refrigerator including a box body, an ice maker and a controller, wherein a refrigerating chamber and a freezing chamber are provided inside the box body, the ice maker is provided inside the freezing chamber, the ice maker includes a water injection pipe and an ice making box, a water inlet of the water injection pipe is connected with a water source, a water outlet of the water injection pipe injects water to the ice making box, and at least a part of an outer wall of the water injection pipe is wrapped with a heating wire, the heating control method includes:
acquiring the actual temperature of the freezing chamber;
according to the relation between the actual temperature and a preset temperature interval, adjusting the power supply voltage of the heating wire;
and adjusting the working time duty ratio of the heating wire according to the relation between the actual temperature and the subinterval in the preset temperature interval so as to maintain the temperature of the water outlet of the water injection pipe within a target temperature range.
In the heating control method for the water injection pipe of the ice maker of the refrigerator according to the seventh embodiment of the present invention, the adjusting the power supply voltage of the heating wire according to the relation between the actual temperature and the preset temperature interval specifically includes:
if the actual temperature is in a first preset temperature interval, controlling the power supply voltage of the heating wire to be the maximum power supply voltage;
if the actual temperature is in a second preset temperature interval, controlling the power supply voltage of the heating wire to be an intermediate power supply voltage;
if the actual temperature is in a third preset temperature interval, controlling the power supply voltage of the heating wire to be the minimum power supply voltage;
the minimum value of the third preset temperature interval is equal to the maximum value of the second preset temperature interval, and the minimum value of the second preset temperature interval is equal to the maximum value of the first preset temperature interval.
In the heating control method for a water injection pipe of an ice maker of a refrigerator according to the eighth embodiment of the present invention, the adjusting the duty ratio of the heating wire according to the relationship between the actual temperature and the subinterval in the preset temperature interval specifically includes:
if the actual temperature is in a first subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a first working time duty ratio;
if the actual temperature is in a second subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a second working time duty ratio;
if the actual temperature is in a third subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a third working time duty ratio;
if the actual temperature is in a fourth subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a fourth working time duty ratio;
if the actual temperature is in a fifth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a fifth working time duty ratio;
if the actual temperature is in a sixth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a sixth working time duty ratio;
wherein the first duty cycle > the second duty cycle > the third duty cycle > the fourth duty cycle > the fifth duty cycle > the sixth duty cycle.
In the heating control method for the water injection pipe of the ice maker of the refrigerator provided by the ninth embodiment of the invention, the working time is as follows:
wherein Don is the duty ratio of the working time, don_min is not less than don_max, don_max=100%; t is the duty cycle of the heating wire, t=ton+toff, ton is the power supply time of the power supply voltage to the heating wire in the T time, and Toff is the time when the power supply voltage stops supplying power to the heating wire in the T time.
In the heating control method for the water injection pipe of the ice maker of the refrigerator provided by the tenth embodiment of the invention, the controller comprises an MCU control module and a voltage regulating module, the MCU control module is connected with the voltage regulating module, the MCU control module outputs PWM waveforms to regulate the output voltage of the voltage regulating module, so that the voltage regulating module outputs variable power supply voltage Uz, uz_min is not more than Uz and not more than Uz_max; the MCU control module also adjusts the duty ratio of the heating wire.
Compared with the prior art, the heating control method for the water injection pipe of the refrigerator and the ice maker provided by the embodiment of the invention has the beneficial effects that: the method comprises the steps of obtaining the actual temperature of a freezing chamber of the refrigerator in real time, and adjusting the power supply voltage of a water injection pipe heating wire of the ice machine according to the relation between the actual temperature and a preset temperature interval, so that the actual output power of the water injection pipe heating wire is changed; according to the relation between the actual temperature and the subinterval in the preset temperature interval, the working time duty ratio of the heating wire of the water injection pipe of the ice machine is adjusted, so that the temperature of the water outlet of the water injection pipe is maintained within the target temperature range, the water injection pipe can be prevented from being frozen and blocked, and meanwhile, the water injection pipe is prevented from being excessively heated to cause the overhigh temperature, and the reliability of the ice machine of the refrigerator in use, especially in the severe environment, is improved.
Drawings
FIG. 1 is a prior art heating control method of a water injection pipe of an ice maker of a refrigerator;
fig. 2 is a schematic view of a refrigerator according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating a structure of an ice maker of a refrigerator according to an embodiment of the present invention;
fig. 4 is a schematic view of a refrigerator body of a refrigerator according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a refrigerating system of a refrigerator according to an embodiment of the present invention;
fig. 6 is a schematic workflow diagram of a controller of a refrigerator according to an embodiment of the present invention;
fig. 7 is a schematic workflow diagram of a controller of a refrigerator according to another embodiment of the present invention;
fig. 8 is a control logic diagram of a controller of a refrigerator according to an embodiment of the present invention;
fig. 9 is a control logic diagram of a controller of a refrigerator according to another embodiment of the present invention;
fig. 10 is a flow chart of a heating control method for a water injection pipe of an ice maker of a refrigerator according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a refrigerator according to an embodiment of the invention. The refrigerator provided by the embodiment of the invention comprises:
a case 10 as a supporting structure of a refrigerator, having a refrigerating chamber and a freezing chamber inside;
the ice maker 20 is arranged in the freezing chamber, the ice maker 20 comprises a water injection pipe 21 and an ice making box 22, a water inlet of the water injection pipe 21 is connected with a water source, a water outlet of the water injection pipe 21 is used for injecting water into the ice making box 22, and at least one part of the outer wall of the water injection pipe 21 is wrapped with a heating wire;
the controller 30 is configured to acquire an actual temperature of the freezing chamber; according to the relation between the actual temperature and a preset temperature interval, adjusting the power supply voltage of the heating wire; and adjusting the working time duty ratio of the heating wire according to the relation between the actual temperature and the subinterval in the preset temperature interval so as to maintain the temperature of the water outlet of the water injection pipe within a target temperature range.
Specifically, an embodiment of the present invention provides a refrigerator including a cabinet 10, an ice maker 20, and a controller 30. Referring to fig. 3, fig. 3 is a schematic structural diagram of an ice maker of a refrigerator according to an embodiment of the invention. The ice maker 20 is disposed in a freezing chamber of the refrigerator, and the ice maker 20 includes a water injection pipe 21 and an ice making housing 22. Wherein, the water inlet of the water injection pipe 21 is connected with a water source, the water outlet 23 of the water injection pipe 21 injects water to the ice making box 22, and at least a part of the outer wall of the water injection pipe 21 is wrapped with a heating wire 24. Illustratively, the water injection pipe in this embodiment may be made of a material with good thermal conductivity so as to heat to a higher temperature, and also to be able to quickly cool down by water flow in a short period of time of water injection. It should be noted that, the water outlet of the water injection pipe may be connected to the ice making box to inject water into the ice making box, or the water outlet of the water injection pipe may be disposed above the ice making box to inject water into the ice making box, which is not limited in this embodiment. Referring to fig. 4, fig. 4 is a schematic structural diagram of a refrigerator body according to an embodiment of the invention. The cabinet 10 serves as a supporting structure of a refrigerator, and is provided with a refrigerating chamber and a freezing chamber inside. One or more door bodies 200 are arranged at the opening of each compartment, for example, in fig. 4, the upper compartment is a refrigerating compartment, and a double door body is arranged on the upper compartment, wherein the door bodies 200 comprise a door body outer shell 210 positioned at the outer side of the box body 10, a door body inner container 220 positioned at the inner side of the box body 10, an upper end cover 230, a lower end cover 240 and a heat insulation layer positioned among the door body outer shell 210, the door body inner container 220, the upper end cover 230 and the lower end cover 240; typically, the insulating layer is filled with a foaming material. The refrigerator performs a cooling operation by a cooling system, and provides cooling power to the compartment to maintain the compartment in a constant low temperature state. Specifically, referring to fig. 5, fig. 5 is a schematic structural diagram of a refrigeration system of a refrigerator according to an embodiment of the present invention. The refrigerating system of the refrigerator in the embodiment of the invention comprises a compressor 1, a refrigerating electromagnetic valve, a fan, an air duct, a condenser 2, an anti-condensation pipe 3, a drying filter 4, a capillary 5, an evaporator 6 and a gas-liquid separator 7, and the working constitution of the refrigerating system comprises a compression process, a condensation process, a throttling process and an evaporation process.
The compression process comprises the following steps: a refrigerator power line is inserted, under the condition that the refrigerator body has refrigeration requirement, the compressor starts to work, low-temperature and low-pressure refrigerant is sucked by the compressor, and the refrigerant is compressed into high-temperature and high-pressure superheated gas in a compressor cylinder and then is discharged into a condenser;
the condensation process is as follows: the high-temperature and high-pressure refrigerant gas is radiated through the condenser, the temperature is continuously reduced, the refrigerant gas is gradually cooled into normal-temperature and high-pressure saturated steam, the saturated steam is further cooled into saturated liquid, the temperature is not reduced any more, the temperature at the moment is called as condensation temperature, and the pressure of the refrigerant in the whole condensation process is almost unchanged;
the throttling process is as follows: the condensed refrigerant saturated liquid is filtered by a drying filter to remove moisture and impurities, and then flows into a capillary tube, throttling and depressurization are carried out through the capillary tube, and the refrigerant is changed into wet vapor at normal temperature and low pressure;
the evaporation process is as follows: then the evaporator begins to absorb heat to vaporize, the temperature of the evaporator and the surrounding is reduced, the refrigerant is changed into low-temperature and low-pressure gas, the refrigerant from the evaporator returns to the compressor again after passing through the gas-liquid separator, the process is repeated, and the heat in the refrigerator is transferred to the air outside the refrigerator, so that the purpose of refrigeration is achieved.
Referring to fig. 6, fig. 6 is a schematic workflow diagram of a controller of a refrigerator according to an embodiment of the invention. A controller 30 configured to: acquiring the actual temperature of a freezing chamber in real time through a temperature sensor in the freezing chamber of the refrigerator; judging a preset temperature interval to which the actual temperature of the freezing chamber belongs according to the relation between the actual temperature and the preset temperature interval, and outputting the power supply voltage of the heating wire of the water injection pipe corresponding to the preset temperature interval so as to adjust the power supply voltage of the heating wire; judging the subinterval in the preset temperature interval to which the actual temperature of the freezing chamber belongs according to the relation between the actual temperature and the subinterval in the preset temperature interval, and controlling the power supply voltage output time duty ratio of the heating wire of the water injection pipe so as to adjust the working time duty ratio of the heating wire, thereby maintaining the temperature of the water outlet of the water injection pipe within the target temperature range.
Note that, according to the formula p=u 2 and/R, since the resistance R of the heating wire is fixed, the actual power P of the heating wire can be adjusted by adjusting the power supply voltage U of the heating wire. When the temperature of the freezing chamber is the same and the working time of the heating wire is the same, the higher the power supply voltage Uz is, the higher the temperature of the water injection pipe is; conversely, the lower the temperature of the water injection pipe. When the temperature of the freezing chamber is the same and the power supply voltage Uz is the same, the larger the working time ratio of the heating wire is, the higher the temperature of the water injection pipe is; conversely, the lower the temperature of the water injection pipe. Based on the above, the embodiment of the invention adjusts the power supply voltage Uz and the working time duty ratio Don of the heating wire of the water injection pipe in real time according to the actual temperature of the freezing chamber, finally maintains the temperature of the water outlet of the water injection pipe within a reasonable target temperature range, realizes the prevention of icing caused by too low temperature of the water outlet of the water injection pipe, simultaneously can avoid the adverse effect on plastic or surrounding plastic parts of the water injection pipe caused by overheating of the water outlet of the water injection pipe, and improves the usability of the ice machine of the refrigerator in the use process, especially in the severe environmentReliability.
As an optional embodiment, the adjusting the power supply voltage of the heating wire according to the relation between the actual temperature and the preset temperature interval specifically includes:
if the actual temperature is in a first preset temperature interval, controlling the power supply voltage of the heating wire to be the maximum power supply voltage;
if the actual temperature is in a second preset temperature interval, controlling the power supply voltage of the heating wire to be an intermediate power supply voltage;
if the actual temperature is in a third preset temperature interval, controlling the power supply voltage of the heating wire to be the minimum power supply voltage;
the maximum value of the first preset temperature interval is equal to the minimum value of the second preset temperature interval, and the maximum value of the second preset temperature interval is equal to the minimum value of the third preset temperature interval.
As an optional embodiment, the adjusting the duty ratio of the heating wire according to the relationship between the actual temperature and the subinterval in the preset temperature interval specifically includes:
if the actual temperature is in a first subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a first working time duty ratio;
if the actual temperature is in a second subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a second working time duty ratio;
if the actual temperature is in a third subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a third working time duty ratio;
if the actual temperature is in a fourth subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a fourth working time duty ratio;
if the actual temperature is in a fifth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a fifth working time duty ratio;
if the actual temperature is in a sixth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a sixth working time duty ratio;
wherein the first duty cycle > the second duty cycle > the third duty cycle > the fourth duty cycle > the fifth duty cycle > the sixth duty cycle.
Referring to fig. 7, fig. 7 is a schematic workflow diagram of a controller of a refrigerator according to another embodiment of the invention. If the actual temperature Tf of the freezing chamber is in the first preset temperature interval, that is, tf < Tf0, the supply voltage uz=uz_max of the heating wire is controlled, and uz_max is the maximum supply voltage. When the actual temperature Tf of the freezing chamber meets Tf0_2 and is smaller than Tf0_1, controlling the working time of the heating wire to occupy the ratio don=don_f0_1; when the actual temperature Tf of the freezing chamber meets Tf0_1 and is smaller than Tf0, the working time of the heating wire is controlled to be equal to the duty ratio don=don_f0_2.
If the actual temperature Tf of the freezing chamber is in a second preset temperature interval, that is, tf0 is less than or equal to Tf < Tf1, the power supply voltage uz=uz_f1 of the heating wire is controlled, uz_f1 is an intermediate power supply voltage, and uz_min < uz_f1 < uz_max. When the actual temperature Tf of the freezing chamber meets Tf0.ltoreq.Tf < Tf1_1, controlling the working time of the heating wire to occupy the ratio don=don_f1_1; when the actual temperature Tf of the freezing chamber meets Tf1_1 and Tf < Tf1, the working time of the heating wire is controlled to be the duty ratio don=don_f1_2.
If the actual temperature Tf of the freezing chamber is in the third preset temperature interval, that is, tf1 is less than or equal to Tf, the supply voltage uz=uz_f2 of the heating wire is controlled, and uz_f2 is the minimum supply voltage, that is, uz_f2=uz_min. When the actual temperature Tf of the freezing chamber meets Tf1 which is less than or equal to Tf < Tf2_1, controlling the working time of the heating wire to occupy the ratio don=don_f2_1; when the actual temperature Tf of the freezing chamber meets Tf2_1 and is smaller than Tf2_2, the working time of the heating wire is controlled to be equal to the duty ratio don=don_f2_2.
It should be noted that, in this embodiment, the output power supply voltage Uz and the duty ratio Don of the heating wire may be divided into a plurality of levels according to the actual temperature of the freezing chamber. Each preset temperature interval of the freezing chamber has a corresponding power supply voltage level, and the higher the actual temperature of the freezing chamber is, the smaller the power supply voltage is. Each subinterval in each preset temperature interval of the freezing chamber is provided with a corresponding duty ratio grade of the heating wire, and the higher the actual temperature of the freezing chamber is, the smaller the duty ratio of the heating wire is. For example, in the above-described embodiment, the first operating time duty ratio > the second operating time duty ratio > the third operating time duty ratio > the fourth operating time duty ratio > the fifth operating time duty ratio > the sixth operating time duty ratio.
As one of the alternative embodiments, the duty cycle is:
wherein Don is the duty ratio of the working time, don_min is not less than don_max, don_max=100%; t is the duty cycle of the heating wire, t=ton+toff, ton is the power supply time of the power supply voltage to the heating wire in the T time, and Toff is the time when the power supply voltage stops supplying power to the heating wire in the T time.
Specifically, the water injection pipe heating wire is set to work with the time T as a period, the power supply time of the power supply voltage Uz to the heating wire in the time T is Ton, the power supply stopping time to the heating wire is Toff, and t=ton+toff. Duty ratio of heating wireWhen the working time of the heating wire is smaller than the Don_min, the working time of the heating wire is too short to achieve the effect of preventing the water injection pipe from icing; therefore, don is adjusted between don_min to don_max (don_max=100%) according to the actual use state of the refrigerator. And when Don is 0, stopping the operation of the heating wire.
As one optional embodiment, the controller comprises an MCU control module and a voltage regulating module, wherein the MCU control module is connected with the voltage regulating module, and the MCU control module outputs PWM waveforms to regulate the output voltage of the voltage regulating module, so that the voltage regulating module outputs variable power supply voltage Uz, uz_min is not less than Uz and not more than uz_max; the MCU control module also adjusts the duty ratio of the heating wire.
Referring to fig. 8, fig. 8 is a control logic diagram of a controller of a refrigerator according to an embodiment of the present invention. The controller comprises an MCU control module and a voltage regulating module, and the MCU control module is connected with the voltage regulating module. The alternating current commercial power is input into the voltage regulating module, the MCU control module outputs PWM waveform with a certain duty ratio to regulate the output voltage of the voltage regulating module, so that the voltage regulating module outputs a variable power supply voltage Uz within a certain range to supply power to the heating wire of the water injection pipe. When the output voltage Uz of the voltage regulating module is smaller than Uz_min, the output power of the heating wire is too small to achieve the effect of preventing the water injection pipe from icing; when the output voltage Uz of the voltage regulating module is larger than Uz_max, the output power of the heating wire is too high, so that energy waste can be caused or the temperature of the water injection pipe is too high; therefore, uz is adjusted between Uz_min and Uz_max according to the actual use state of the refrigerator. When Uz is 0, the operation of the heating wire is stopped. The output voltage Uz of the voltage regulating module is controlled by an electronic switch, and the MCU control module controls the output time duty ratio of the power supply voltage by driving the electronic switch to be turned on or off so as to adjust the working time duty ratio of the heating wire.
It should be noted that the power supply voltage of the heating wire of the water injection pipe can be ac or dc, and the voltage regulating principle is similar, except that the power supply voltage needs to be rectified and reduced when dc power is used for supplying power. Referring to fig. 9, fig. 9 is a control logic diagram of a controller of a refrigerator according to another embodiment of the present invention. The controller also comprises a rectification voltage-reducing module, the alternating current commercial power is converted into low-voltage direct current through the rectification voltage-reducing module and then is input into the voltage-regulating module, the MCU control module outputs PWM waveforms with a certain duty ratio to regulate the output voltage of the voltage-regulating module, so that the voltage-regulating module outputs a variable power supply voltage Uz within a certain range to supply power to the heating wire of the water injection pipe. When the output voltage Uz of the voltage regulating module is smaller than Uz_min, the output power of the heating wire is too small to achieve the effect of preventing the water injection pipe from icing; when the output voltage Uz of the voltage regulating module is larger than Uz_max, the output power of the heating wire is too high, so that energy waste can be caused or the temperature of the water injection pipe is too high; therefore, uz is adjusted between Uz_min and Uz_max according to the actual use state of the refrigerator. When Uz is 0, the operation of the heating wire is stopped. The output voltage Uz of the voltage regulating module is controlled by an electronic switch, and the MCU control module controls the output time duty ratio of the power supply voltage by driving the electronic switch to be turned on or off so as to adjust the working time duty ratio of the heating wire.
Referring to fig. 10, fig. 10 is a flow chart of a heating control method for a water injection pipe of an ice maker of a refrigerator according to an embodiment of the invention. The embodiment of the invention provides a heating control method of a water injection pipe of an ice maker of a refrigerator, which is applied to the refrigerator comprising a box body, the ice maker and a controller, wherein a refrigerating chamber and a freezing chamber are arranged in the box body, the ice maker is arranged in the freezing chamber, the ice maker comprises the water injection pipe and an ice making box, a water inlet of the water injection pipe is connected with a water source, a water outlet of the water injection pipe is used for injecting water into the ice making box, and at least part of the outer wall of the water injection pipe is wrapped with a heating wire, and the heating control method comprises the following steps:
s1, acquiring the actual temperature of the freezing chamber;
s2, adjusting the power supply voltage of the heating wire according to the relation between the actual temperature and a preset temperature interval;
and S3, adjusting the duty ratio of the working time of the heating wire according to the relation between the actual temperature and the subinterval in the preset temperature interval so as to maintain the temperature of the water outlet of the water injection pipe within a target temperature range.
As an optional embodiment, the step S2 of adjusting the power supply voltage of the heating wire according to the relationship between the actual temperature and the preset temperature interval specifically includes:
s21, if the actual temperature is in a first preset temperature interval, controlling the power supply voltage of the heating wire to be the maximum power supply voltage;
s22, if the actual temperature is in a second preset temperature interval, controlling the power supply voltage of the heating wire to be an intermediate power supply voltage;
s23, if the actual temperature is in a third preset temperature interval, controlling the power supply voltage of the heating wire to be the minimum power supply voltage;
the minimum value of the third preset temperature interval is equal to the maximum value of the second preset temperature interval, and the minimum value of the second preset temperature interval is equal to the maximum value of the first preset temperature interval.
As an optional embodiment, the step S3 of adjusting the duty cycle of the heating wire according to the relationship between the actual temperature and the subinterval in the preset temperature interval specifically includes:
s31, if the actual temperature is in a first subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a first working time duty ratio;
s32, if the actual temperature is in a second subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a second working time duty ratio;
s33, if the actual temperature is in a third subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a third working time duty ratio;
s34, if the actual temperature is in a fourth subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a fourth working time duty ratio;
s35, if the actual temperature is in a fifth subinterval within the third preset temperature interval, controlling the duty ratio of the heating wire to be a fifth duty ratio;
s36, if the actual temperature is in a sixth subinterval within the third preset temperature interval, controlling the duty ratio of the heating wire to be a sixth duty ratio;
wherein the first duty cycle > the second duty cycle > the third duty cycle > the fourth duty cycle > the fifth duty cycle > the sixth duty cycle.
As one of the alternative embodiments, the duty cycle is:
wherein Don is the duty ratio of the working time, don_min is not less than don_max, don_max=100%; t is the duty cycle of the heating wire, t=ton+toff, ton is the power supply time of the power supply voltage to the heating wire in the T time, and Toff is the time when the power supply voltage stops supplying power to the heating wire in the T time.
As one optional embodiment, the controller comprises an MCU control module and a voltage regulating module, wherein the MCU control module is connected with the voltage regulating module, and the MCU control module outputs PWM waveforms to regulate the output voltage of the voltage regulating module, so that the voltage regulating module outputs variable power supply voltage Uz, uz_min is not less than Uz and not more than uz_max; the MCU control module also adjusts the duty ratio of the heating wire.
The embodiment of the invention provides a refrigerator and a heating control method of a water injection pipe of an ice maker, wherein the actual temperature of a freezing chamber of the refrigerator is obtained in real time, and the power supply voltage of a heating wire of the water injection pipe of the ice maker is adjusted according to the relation between the actual temperature and a preset temperature interval, so that the actual output power of the heating wire of the water injection pipe is changed; according to the relation between the actual temperature and the subinterval in the preset temperature interval, the working time duty ratio of the heating wire of the water injection pipe of the ice machine is adjusted, so that the temperature of the water outlet of the water injection pipe is maintained within the target temperature range, the water injection pipe can be prevented from being frozen and blocked, and meanwhile, the water injection pipe is prevented from being excessively heated to cause the overhigh temperature, and the reliability of the ice machine of the refrigerator in use, especially in the severe environment, is improved.
It should be noted that the system embodiments described above are merely illustrative, and that the units described as separate units may or may not be physically separate, and that units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the system embodiment of the present invention, the connection relationship between the modules represents that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (10)
1. A refrigerator, comprising:
the refrigerator comprises a refrigerator body, a refrigerating chamber and a freezing chamber, wherein the refrigerator body is used as a supporting structure of the refrigerator;
the ice maker is arranged in the freezing chamber and comprises a water injection pipe and an ice making box, a water inlet of the water injection pipe is connected with a water source, a water outlet of the water injection pipe is used for injecting water into the ice making box, and at least one part of the outer wall of the water injection pipe is wrapped with a heating wire;
the controller is configured to obtain an actual temperature of the freezer compartment; according to the relation between the actual temperature and a preset temperature interval, adjusting the power supply voltage of the heating wire; and adjusting the working time duty ratio of the heating wire according to the relation between the actual temperature and the subinterval in the preset temperature interval so as to maintain the temperature of the water outlet of the water injection pipe within a target temperature range.
2. The refrigerator of claim 1, wherein the adjusting the power supply voltage of the heating wire according to the relation between the actual temperature and a preset temperature interval comprises:
if the actual temperature is in a first preset temperature interval, controlling the power supply voltage of the heating wire to be the maximum power supply voltage;
if the actual temperature is in a second preset temperature interval, controlling the power supply voltage of the heating wire to be an intermediate power supply voltage;
if the actual temperature is in a third preset temperature interval, controlling the power supply voltage of the heating wire to be the minimum power supply voltage;
the maximum value of the first preset temperature interval is equal to the minimum value of the second preset temperature interval, and the maximum value of the second preset temperature interval is equal to the minimum value of the third preset temperature interval.
3. The refrigerator of claim 2, wherein the adjusting the duty ratio of the heating wire according to the relationship between the actual temperature and the sub-interval in the preset temperature interval specifically comprises:
if the actual temperature is in a first subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a first working time duty ratio;
if the actual temperature is in a second subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a second working time duty ratio;
if the actual temperature is in a third subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a third working time duty ratio;
if the actual temperature is in a fourth subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a fourth working time duty ratio;
if the actual temperature is in a fifth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a fifth working time duty ratio;
if the actual temperature is in a sixth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a sixth working time duty ratio;
wherein the first duty cycle > the second duty cycle > the third duty cycle > the fourth duty cycle > the fifth duty cycle > the sixth duty cycle.
4. The refrigerator of claim 3, wherein the duty cycle is:
wherein Don is the duty ratio of the working time, don_min is not less than don_max, don_max=100%; t is the duty cycle of the heating wire, t=ton+toff, ton is the power supply time of the power supply voltage to the heating wire in the T time, and Toff is the time when the power supply voltage stops supplying power to the heating wire in the T time.
5. The refrigerator as claimed in claim 4, wherein the controller includes an MCU control module and a voltage regulating module, the MCU control module is connected with the voltage regulating module, the MCU control module outputs PWM waveforms to regulate the output voltage of the voltage regulating module, so that the voltage regulating module outputs variable power supply voltage Uz, uz_min is less than or equal to Uz_max; the MCU control module also adjusts the duty ratio of the heating wire.
6. The utility model provides a heating control method of refrigerator ice maker water injection pipe, its characterized in that, heating control method is applied to the refrigerator including box, ice maker and controller, wherein, the box is inside to be equipped with cold-storage chamber and freezer, the ice maker sets up in the freezer, the ice maker includes water injection pipe and ice making box, the water inlet of water injection pipe is connected the water source, the delivery port of water injection pipe is to the water injection of ice making box, and at least a portion of water injection pipe outer wall parcel has the heater strip, heating control method includes:
acquiring the actual temperature of the freezing chamber;
according to the relation between the actual temperature and a preset temperature interval, adjusting the power supply voltage of the heating wire;
and adjusting the working time duty ratio of the heating wire according to the relation between the actual temperature and the subinterval in the preset temperature interval so as to maintain the temperature of the water outlet of the water injection pipe within a target temperature range.
7. The method for controlling the heating of the water injection pipe of the ice maker of the refrigerator according to claim 6, wherein the adjusting the power supply voltage of the heating wire according to the relation between the actual temperature and the preset temperature interval comprises the following steps:
if the actual temperature is in a first preset temperature interval, controlling the power supply voltage of the heating wire to be the maximum power supply voltage;
if the actual temperature is in a second preset temperature interval, controlling the power supply voltage of the heating wire to be an intermediate power supply voltage;
if the actual temperature is in a third preset temperature interval, controlling the power supply voltage of the heating wire to be the minimum power supply voltage;
the minimum value of the third preset temperature interval is equal to the maximum value of the second preset temperature interval, and the minimum value of the second preset temperature interval is equal to the maximum value of the first preset temperature interval.
8. The method for controlling heating of water injection pipe of ice maker of refrigerator as claimed in claim 7, wherein said adjusting the duty ratio of said heating wire according to the relation between said actual temperature and sub-intervals in said preset temperature interval comprises:
if the actual temperature is in a first subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a first working time duty ratio;
if the actual temperature is in a second subinterval within the first preset temperature interval, controlling the working time duty ratio of the heating wire to be a second working time duty ratio;
if the actual temperature is in a third subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a third working time duty ratio;
if the actual temperature is in a fourth subinterval within the second preset temperature interval, controlling the working time duty ratio of the heating wire to be a fourth working time duty ratio;
if the actual temperature is in a fifth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a fifth working time duty ratio;
if the actual temperature is in a sixth subinterval within the third preset temperature interval, controlling the working time duty ratio of the heating wire to be a sixth working time duty ratio;
wherein the first duty cycle > the second duty cycle > the third duty cycle > the fourth duty cycle > the fifth duty cycle > the sixth duty cycle.
9. The method for controlling the heating of the water injection pipe of the ice maker of the refrigerator as claimed in claim 8, wherein the operating time is as follows:
wherein Don is the duty ratio of the working time, don_min is not less than don_max, don_max=100%; t is the duty cycle of the heating wire, t=ton+toff, ton is the power supply time of the power supply voltage to the heating wire in the T time, and Toff is the time when the power supply voltage stops supplying power to the heating wire in the T time.
10. The method for controlling the heating of the water injection pipe of the ice maker of the refrigerator according to claim 9, wherein the controller comprises an MCU control module and a voltage regulating module, the MCU control module is connected with the voltage regulating module, the MCU control module outputs PWM waveforms to regulate the output voltage of the voltage regulating module, so that the voltage regulating module outputs variable power supply voltage Uz, uz_min is less than or equal to Uz_max; the MCU control module also adjusts the duty ratio of the heating wire.
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| CN202210795459.XA CN117404858A (en) | 2022-07-07 | 2022-07-07 | Refrigerator and heating control method for water injection pipe of ice maker |
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| CN202210795459.XA CN117404858A (en) | 2022-07-07 | 2022-07-07 | Refrigerator and heating control method for water injection pipe of ice maker |
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