CN112064288A

CN112064288A - Washing machine and control method thereof

Info

Publication number: CN112064288A
Application number: CN201910499803.9A
Authority: CN
Inventors: 许升; 吕佩师; 赵志强
Original assignee: Qingdao Haier Drum Washing Machine Co Ltd; Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Drum Washing Machine Co Ltd; Qingdao Haier Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-12-11
Also published as: WO2020248960A1

Abstract

The invention discloses a washing machine and a control method thereof, wherein the washing machine comprises an inner barrel, and washing water is independently contained when clothes are washed; the water inlet system is communicated with the inner barrel; the heating device heats the water in the inner cylinder; and the temperature detection device is arranged in the water inlet system and used for detecting the water inlet temperature. When the washing machine executes a water inlet program, the control unit of the washing machine controls the heating time of the heating device according to the result detected by the temperature detection device. The invention realizes the control of the heating time of the washing water in the non-porous inner cylinder by combining the heating device and the temperature detection device, and effectively avoids the influence on the normal work of the washing machine caused by the over-low or over-high water temperature caused by the over-low or over-long heating time of the heating device.

Description

Washing machine and control method thereof

Technical Field

The invention belongs to the technical field of washing machines, and particularly relates to a washing machine and a control method thereof.

Background

The washing machine is one of household appliances which are commonly used in daily life. The washing machine brings convenience to the life of people. In the prior art, an outer barrel contains water, an inner barrel rotates to wash, holes are formed in the wall of the inner barrel and used for feeding washing water into the inner barrel or dewatering clothes in the inner barrel, the washing water flows between the inner barrel and the outer barrel for a long time, so that dirt and scale can be accumulated between interlayers of the inner barrel and the outer barrel, a large amount of bacteria can be propagated, secondary pollution is caused to the clothes, the health of consumers is seriously threatened, and useless water waste is caused by filling water between the interlayers between the inner barrel and the outer barrel, so that people design a non-porous inner barrel washing machine.

Along with the continuous improvement of the life quality of people, the requirement of people on the washing effect of the washing machine is higher and higher. Therefore, the user generally heats the washing water in the washing process, so that the decontamination capability of the detergent can be improved, and the heated washing water can sterilize and disinfect the clothes. The conventional heating device is arranged on the outer cylinder of the washing machine to heat water between the inner cylinder and the outer cylinder of the washing machine, but the washing machine with the non-porous inner cylinder has no water between the inner cylinder and the outer cylinder and cannot heat washing water in the inner cylinder, so that how to heat the washing water in the inner cylinder by the washing machine with the non-porous inner cylinder is a problem which needs to be solved urgently by a person skilled in the art.

In addition, in the heating process, the heating time is not well controlled, the washing effect is poor due to too short heating time and low water temperature, or the clothes deform and fade and some clothes are irrecoverable to be damaged due to too long heating time and too high water temperature, and a large amount of electric energy is consumed due to too long heating time, so that excessive electric quantity is wasted, and therefore, how to control the heating time of the washing water in the washing machine with the non-porous inner barrel is a problem which needs to be solved by technical personnel in the field urgently.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a washing machine and a control method thereof, which can control the heating time of water in an imperforate inner cylinder and effectively avoid the problem that the water temperature in the inner cylinder is too low or too high due to too short or too long heating time of a heating device, so that the washing effect is influenced or the clothes and the washing machine are damaged.

In order to realize the purpose, the invention adopts the following technical scheme:

a washing machine comprising:

an inner tub for independently containing washing water when washing clothes;

the water inlet system is communicated with the inner barrel;

the heating device heats the water in the inner cylinder;

and the temperature detection device is arranged in the water inlet system and used for detecting the water inlet temperature.

Furthermore, the system also comprises a flow detection device which is arranged in the water inlet system and used for detecting the water inlet amount;

preferably, the flow rate detecting device is a flow sensor, and the temperature detecting device is a temperature sensor.

Furthermore, the water inlet system comprises a water inlet pipeline communicated with the inside of the inner cylinder, and the temperature detection device and the flow detection device are respectively arranged in the water inlet pipeline;

preferably, the water inlet system further comprises a water inlet valve arranged on the water inlet pipeline, and the temperature detection device and the flow detection device are integrally assembled with the water inlet valve.

The heating device is arranged on the outer cylinder or the shell;

preferably, the heating device is arranged on the inner wall of the outer barrel, and the heating device is an electromagnetic heating device.

The invention also provides a control method of the washing machine, when the washing machine executes a water inlet program, the control unit of the washing machine controls the heating device to work according to the result detected by the temperature detection device.

Further, the control unit of the washing machine calculates the heating time T of the heating device for the inner cylinder when the water in the inner cylinder is heated from the initial water temperature to the set water temperature according to the initial water temperature value fed back by the temperature detection device, and stops working after controlling the heating time T of the heating device;

the heating time T of the heating device is as follows:

T＝4.2·(t–t0)·L/3600；

wherein: t is heating time, 4.2 is a constant, T is set water temperature, T0 is initial water temperature, and L is set water inflow.

Further, the initial water temperature t0 is (t1+ t2+ t3+ t4+, tn)/n, wherein n is more than or equal to 3; t 1-tn are different water temperature values detected by the temperature detection device at different time in the water inlet process of the washing machine;

preferably, the temperature detecting device detects the water temperature value once every certain time.

Further, when the washing machine executes a water inlet program, the control unit of the washing machine judges whether the set water inlet is reached according to the current water inlet fed back by the flow detection device, if so, the water inlet is stopped, and the judgment of whether the heating device is started is carried out; if not, water is continuously fed.

Further, the control unit of the washing machine judges whether to start the heating device according to whether the user selects to start the heating program.

Furthermore, when the user selects to start the heating program, the control unit of the washing machine further needs to judge whether the initial water temperature detected by the current temperature detection device reaches the set water temperature, and if so, the washing program is executed; if not, the heating device is started.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

1. The washing machine provided by the invention realizes control of the heating time of the water in the imperforate inner cylinder by adopting a mode of combining the temperature detection device and the heating device, and effectively avoids the problem that the washing effect is influenced or the clothes and the washing machine are damaged due to too low or too high water temperature in the inner cylinder caused by too short or too long heating time of the heating device.

2. The washing machine provided by the invention not only improves the intelligent level of the washing machine, but also effectively avoids unnecessary waste of electric energy caused by overlong heating time by automatically controlling the heating time of the heating device.

3. The washing machine provided by the invention adopts the electromagnetic heating device to heat the inner barrel, so as to heat the clothes in the inner barrel and the water in the inner barrel, the structure is simple, the assembly efficiency is high, and the practical popularization of the product is improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a drum washing machine according to a first embodiment of the present invention;

FIG. 2 is another schematic diagram of a drum washing machine according to an embodiment of the present invention;

FIG. 3 is a schematic view of a drum washing machine according to an embodiment of the present invention;

FIG. 4 is a schematic view of a three-drum washing machine according to an embodiment of the present invention;

FIG. 5 is a flowchart of a control method of a three-drum washing machine according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a four-electromagnetic heating apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a five-drum washing machine according to an embodiment of the present invention;

FIG. 8 is a schematic view of a drum washing machine according to a sixth embodiment of the present invention;

fig. 9 is a first schematic perspective view of a clothes lifting device for a washing machine according to a sixth embodiment of the present invention;

fig. 10 is a second schematic perspective view of a clothes lifting device for a washing machine according to a sixth embodiment of the present invention;

fig. 11 is a front view of a laundry lifting device for a washing machine according to a sixth embodiment of the present invention;

fig. 12 is a sectional view of a laundry lifting device for a washing machine according to a sixth embodiment of the present invention, taken along the plane a-a of fig. 11;

fig. 13 is a sectional view of a laundry lifting device for a washing machine according to a sixth embodiment of the present invention, taken along the plane B-B in fig. 11 (embodiment one);

fig. 14 is a sectional view of a laundry lifting device for a washing machine according to a sixth embodiment of the present invention, taken along the plane B-B in fig. 11 (embodiment two);

FIG. 15 is a schematic view of a drum washing machine according to a seventh embodiment of the present invention;

fig. 16 is a partially enlarged view (pressure-released state) of fig. 15 of the drum washing machine according to the seventh embodiment of the present invention;

fig. 17 is a partially enlarged view (pressurized state) of fig. 15 of the drum washing machine according to the seventh embodiment of the present invention;

fig. 18 is a schematic view of a drum washing machine according to an eighth embodiment of the present invention;

fig. 19 is an enlarged partial view of fig. 18 (a pressure release state in the first embodiment) of the drum washing machine according to the eighth embodiment of the present invention;

fig. 20 is a partially enlarged view of fig. 18 of a drum washing machine according to an eighth embodiment of the present invention (pressurized state of the first embodiment);

fig. 21 is an enlarged partial view of fig. 18 (a pressure release state in the second embodiment) of the drum washing machine according to the eighth embodiment of the present invention;

fig. 22 is a partially enlarged view of fig. 18 (pressurized state in the second embodiment) of the drum washing machine according to the eighth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 22, the present embodiment provides a drum washing machine with a non-porous inner drum front opening structure, which has a simple structure, and can greatly reduce the amount of washing water of the washing machine without filling washing/rinsing water between the inner drum and the outer drum. The possibility of dirt adhesion between the inner cylinder and the outer cylinder is avoided. The user health and user experience are greatly improved, and water resources are greatly saved.

The drum washing machine of the present embodiment has a housing 19, and the housing 19 includes: a top deck 2, a front panel, a back panel and a bottom panel. The bottom plate is provided with feet 9 for supporting the whole washing machine. The outer casing 19 has an outer cylinder 18 inside, and an inner cylinder 17 is coaxially disposed inside the outer cylinder 18. The outer cylinder 18 is mainly used for collecting the drainage of the inner cylinder 17 and the drainage of the inner cylinder 17 by high-speed centrifugal dehydration. The drum 17 rotates, preferably with lifting ribs, and is continuously lifted to drop and beat the laundry, so as to wash the laundry. The inner barrel 17 is of non-porous construction. The outer cylinder 18 has a central mounting hole to which the bearing 12 is fixedly mounted. An inner drum shaft 13, which is fixedly connected to the inner drum 17, passes through the bearing 12 shown and is connected to a drive motor 16. An openable/closable inner cylinder door 6 is installed on a front cylinder opening of the inner cylinder 17, thereby realizing that the inner cylinder 17 is of a sealed cabin structure. The housing 19 is provided with an openable/closable door 5.

Example one

The embodiment mainly solves the problem that when the washing machine with the non-porous inner barrel executes a heating program, the washing effect is influenced due to the fact that the water temperature is low because the heating temperature cannot be controlled well; or the water temperature is higher, which causes damage to the clothes.

In conjunction with fig. 1 and 2, the present embodiment provides a washing machine including: the inner cylinder 17 independently holds washing water when washing clothes, so that the problems of dirt accumulation and bacteria breeding caused by the fact that washing water is accumulated and overflowed outside the inner cylinder 17 are solved; the electromagnetic heating device 33 heats the inner drum 17, further heats the washing water in the inner drum 17, enhances the decontamination capability, and meanwhile, the heated washing water can sterilize and disinfect the clothes; the temperature detector 34 directly detects the temperature of the water in the inner tube 17, or detects the temperature of the inner tube 17, or detects the temperature at a position at a distance from the outer surface of the inner tube 17. The temperature detector 34 and the electromagnetic heater 33 are electrically connected to the main controller 4 of the washing machine, and the main controller 4 of the washing machine determines the temperature of the water in the inner tub 17 according to the temperature detected by the temperature detector 34, thereby controlling the operation of the electromagnetic heater 33.

The washing machine provided by the embodiment further comprises an outer cylinder 18 which is sleeved outside the inner cylinder 17 and is coaxially arranged with the inner cylinder 17, and the temperature detection device 34 can be assembled with the electromagnetic heating device 33 into a whole, so that the installation steps are simplified; or, the temperature sensor is directly fixedly installed on the outer cylinder 18, preferably, arranged on the inner wall of the outer cylinder 18, and indirectly judges the temperature of the water in the inner cylinder 17 by detecting the temperature of the outer cylinder 18; alternatively, the temperature detection device 34 may be fixed to an arbitrary position between the inner cylinder 17 and the outer cylinder 18 by a fixing structure, the temperature detection device is closer to the inner cylinder 17, the measured temperature value is closer to the water temperature in the inner cylinder 17, and the temperature of the water in the inner cylinder 17 is indirectly determined by detecting the temperature between the inner cylinder 17 and the outer cylinder 18.

In this embodiment, the temperature detecting device 34 is a temperature sensor, and detects the water temperature in the inner barrel 17 through the temperature sensor, so as to provide the current temperature for the main controller 4, and ensure that the main controller 4 controls the water temperature in the inner barrel 17 to achieve a better washing effect. The temperature sensor is a resistance temperature detector; alternatively, a semiconductor sensor; alternatively, a thermocouple; or, an NTC temperature sensor. More preferably, the NTC temperature sensor is formed by connecting a thermistor with a negative temperature coefficient and a lead, and the resistance value of the NTC thermistor rapidly decreases with the temperature increase under a certain measuring power. By utilizing the characteristic, the NTC thermistor can determine the corresponding temperature by measuring the resistance value thereof and transmit the temperature to the main controller 4 of the washing machine through the signal line 34, thereby achieving the purpose of detecting and controlling the water temperature in the inner drum 17.

In this embodiment, the electromagnetic heating device 33 includes an electromagnetic heating coil 331 and a rectifier 332, a heating program is started, a current voltage is converted into a direct current through the rectifier (driver) 332, so that the direct current is converted into a high-frequency alternating current exceeding an audio frequency, the high-frequency alternating current is output to the electromagnetic heating coil 331, a high-frequency alternating magnetic field is generated, an electromagnetic induction line of the high-frequency alternating magnetic field acts on the outer cylinder 18 made of a metal material, a strong eddy current is generated in the inner cylinder 17 due to electromagnetic induction, and the eddy current overcomes the internal resistance of the inner cylinder 17 and completes the conversion of electric energy into heat energy when flowing, so that the inner cylinder 17 heats up, and the purpose of heating.

The electromagnetic heating device 33 is disposed on the outer tub 18, the electromagnetic heating device 33 may also be disposed on the casing 19 of the washing machine, and preferably, as shown in fig. 1, the electromagnetic heating device 33 is disposed on the inner wall of the outer tub 18. Adopt electromagnetic heating device 33 to heat inner tube 17, and then heat the clothing in the inner tube 17 and the water in the inner tube 17, simple structure, assembly efficiency is high, has improved the practical popularization of product.

In this embodiment, the heating area of the inner cylinder 17 corresponding to the electromagnetic heating device 33 is divided into a direct heating area and an indirect heating area, in order to enable the heating to be more uniform, when the electromagnetic heating device 33 is started, the inner cylinder 17 is controlled to rotate, the area of the inner cylinder 17 directly heated is increased, meanwhile, the heating to be more uniform is enabled, the inner cylinder 17 located in the heating range of the electromagnetic heating device 33 is divided into the direct heating area, the inner cylinder 17 heated by heat transfer is divided into the indirect heating area, and the temperature detection device 34 is arranged on the inner wall of the outer cylinder 18 corresponding to the direct heating area or the indirect heating area.

At least part of the structure of the inner cylinder 17 is made of metal material, so that the eddy current effect is generated by the magnetic field generated by the electromagnetic heating device 33 to generate heat, the heating heat is transferred to the water in the inner cylinder 17, and the water temperature is improved to enhance the washing effect of the washing machine.

Preferably, the temperature detecting device 34 is disposed on the inner wall of the outer cylinder 18 corresponding to the indirect heating zone, and since the temperature of the water in the inner cylinder 17 of the direct heating zone is much higher than the actual water temperature, it is more accurate to dispose the temperature detecting device 34 on the inner wall of the outer cylinder 18 corresponding to the indirect heating zone to measure the water temperature in the inner cylinder 17.

More preferably, as shown in fig. 2, the temperature detection device 34 and the electromagnetic heating device 33 are both disposed on the circumference of the inner wall of the outer cylinder 18, the temperature detection device 34 is disposed at the position farthest from the axial direction of the electromagnetic heating device 33, and the projections of the two on the cross section of the outer cylinder 18 fall on the two end points of the same diameter. The temperature detection device 34 is arranged at the farthest end away from the electromagnetic heating device 34, and is used for measuring the water temperature in the inner barrel 17, so that the error is small, and the accuracy is higher.

In order to ensure the accuracy of temperature measurement and avoid accidental errors, a plurality of temperature sensors are arranged on the inner wall of the outer barrel 18, the water temperature in the inner barrel 17 is measured simultaneously, the temperature sensors are respectively electrically connected with the main controller 4, the temperature sensors are arranged on the inner wall of the outer barrel 18 at certain intervals to obtain a plurality of temperature values of different positions of the inner barrel 17, then the average temperature value is calculated, and the measurement errors are reduced.

Preferably, the temperature sensors are uniformly distributed on the inner wall of the outer barrel 18 corresponding to the direct heating area and the inner wall of the outer barrel 18 corresponding to the indirect heating area, so that the problem that the deviation between the measurement result and the actual water temperature is large because only the water temperature in the direct heating area or the indirect heating area is measured is avoided.

The embodiment also provides a control method of the washing machine, wherein the control unit of the washing machine judges the current water temperature in the inner barrel according to the result fed back by the temperature detection device and controls the on-off of the electromagnetic heating device. The problem that the electromagnetic heating device cannot be cut off in time due to overhigh heating temperature to cause certain potential safety hazards is avoided.

Specifically, the temperature sensor transmits the detected temperature value t to a control unit of the washing machine, the control unit calculates and analyzes to obtain the current water temperature t ', and judges whether the current water temperature t' reaches a set temperature t0, if so, the electromagnetic heating device is controlled to be powered off; if not, controlling the electromagnetic heating device to keep electrifying. The washing machine avoids the problems that the detergent is not sufficiently dissolved due to low water temperature, and the dirty organic matters on the clothes can not be dissolved, so that the washing effect of the washed clothes is reduced, or the clothes are deformed, faded and damaged due to high water temperature or certain damage is caused to the washing machine due to overhigh temperature.

Preferably, the temperature sensors transmit detected temperature values t1, t2, t3, tn to a control unit of the washing machine, the control unit calculates and analyzes water temperatures t1 ', t2 ', t3 ', tn ' in the inner cylinder, calculates and analyzes the current water temperature t ' ═ t1 ' + t2 ' + t3 ', tn ')/n, and judges whether a set temperature t0 is reached or not, if yes, the electromagnetic heating device is controlled to be powered off; if not, controlling the electromagnetic heating device to keep electrifying. By adopting the mode of averaging, the current water temperature in the inner barrel is obtained, and the accuracy is higher.

Example two

The embodiment is an improvement on the basis of the first embodiment, and a non-contact temperature detection device is adopted, so that the temperature measurement result is more accurate.

With reference to fig. 1, 2 and 3, the present embodiment provides a washing machine including: the inner cylinder 17 independently holds washing water when washing clothes, so that the problems of dirt accumulation and bacteria breeding caused by the fact that washing water is accumulated and overflowed outside the inner cylinder 17 are solved; the electromagnetic heating device 33 heats the water in the inner drum 17 to enhance the decontamination capability, and meanwhile, the heated washing water can also sterilize and disinfect the clothes; the non-contact temperature detection device 37 detects the water temperature in the inner cylinder 17 or detects the temperature of the inner cylinder 17, the non-contact temperature detection device adopted by the embodiment has high precision, high resolution and quick response time, the water temperature in the inner cylinder 17 or the inner cylinder 17 can be accurately measured without directly contacting the inner cylinder 17 or the water in the inner cylinder 17, and the non-contact temperature detection device 37 and the electromagnetic heating device 33 are respectively and electrically connected with the main controller 4 of the washing machine. The main controller 4 of the washing machine determines the temperature of the water in the inner tub 17 based on the temperature value detected by the non-contact temperature detecting device 37, and controls the operation of the electromagnetic heating device 33.

The non-contact temperature detection device 37 does not need to be in direct contact with the detected object, so that the setting position is more flexible, unlimited and easy to install, and the non-contact temperature detection device 37 can be assembled with the electromagnetic heating device 33 into a whole, so that the installation steps are simplified; or, the device also comprises an outer cylinder 18 which is sleeved outside the inner cylinder 17 and is coaxially arranged with the inner cylinder 17, or is directly and fixedly arranged on the outer cylinder 18, preferably, on the inner wall of the outer cylinder 18; or, the non-contact temperature detection device 37 is arranged on the outer shell 19, and the outer shell 19 is arranged outside the outer shell 18.

In this implementation, the non-contact temperature detecting device 37 is a non-contact temperature sensor, and detects the water temperature in the inner barrel 17 through the temperature sensor, so as to provide the current temperature for the main controller 4, and ensure that the main controller 4 controls the water temperature in the inner barrel 17 to achieve a better washing effect.

The non-contact temperature sensor is an infrared temperature sensor; or, an ultrasonic temperature sensor; or, a microwave temperature measuring temperature sensor; or, a laser temperature sensor.

Preferably, the non-contact temperature sensor is an infrared temperature sensor, and the infrared temperature sensor is composed of an optical system, a photoelectric detector, a signal amplifier, signal processing and the like. The optical system converges the infrared radiant energy of the target in the field of view, and the size of the field of view is determined by the optical parts of the thermometer and the position of the optical parts. The infrared energy is focused on the photodetector and converted into a corresponding electrical signal. The signal is converted into the temperature value of the target to be measured after passing through an amplifier and a signal processing circuit and being corrected according to an algorithm in the instrument and the target emissivity. And transmitted to the main controller 4 of the washing machine through the signal line 35, thereby achieving the purpose of detecting and controlling the temperature of the water in the inner tub 17.

The infrared temperature sensor can measure the temperature of the surface of the inner barrel 17, so as to indirectly obtain the water temperature in the inner barrel 17, or directly measure the temperature of the water in the inner barrel 17, specifically, an infrared window is arranged on the barrel body of the inner barrel 17, a detection head of the infrared temperature sensor detector directly measures the temperature of the water in the inner barrel 17 through the infrared window, the infrared window is an optical window which can transmit ultraviolet rays, visible light and infrared rays, and the infrared window is arranged on the barrel body of the inner barrel 17, so that the infrared imaging temperature measurement of the inner barrel 17 in a closed operation state can be realized, and the purpose of directly measuring the water temperature in the inner barrel 17 is further realized.

In this embodiment, the inner cylinder 17 includes an inner cylinder door 6, the inner cylinder door 6 is openably/closably installed on the opening of the inner cylinder for putting in the clothes, and the infrared temperature sensor is disposed on the inner wall of the outer cylinder 18 with its probe facing the surface of the cylinder of the inner cylinder 17. Alternatively, as shown in fig. 3, the infrared temperature sensor is provided on the openable/closable door 5 mounted on the housing 19, and the probe of the infrared sensor detector is directed toward the surface of the inner tub door 6, thereby indirectly measuring the temperature of water in the inner tub 17.

The heating area that the inner tube 17 corresponds electromagnetic heating device 33 divides into the direct heating area and the indirect heating area, in order to make the heating more even when electromagnetic heating device 33 starts, control the inner tube 17 rotatory, increase the area that the inner tube 17 is directly heated, make the heating more even simultaneously, the inner tube 17 that is located the heating zone of electromagnetic heating device 33 is divided into the direct heating area, the inner tube 17 that is heated through the heat transfer is divided into the indirect heating area, the barrel surface of the inner tube 17 of the indirect heating area is towards to the detecting head of infrared temperature sensor detector. Since the water temperature of the inner tube 17 of the direct heating zone is much higher than the actual water temperature, it is more accurate to measure the water temperature in the inner tube 17 by directing the probe of the infrared temperature sensor to the outer surface of the inner tube 17 located in the indirect heating zone.

In order to ensure the accuracy of temperature measurement, infrared temperature sensor be a plurality of, respectively with main control unit 4 electricity is connected, and is a plurality of temperature sensor interval certain distance or the setting at certain angle of interval are at urceolus 17 inner wall, temperature sensor's detecting head is towards the barrel surface of the inner tube 17 of different positions, and then obtains a plurality of temperature values of the different positions of inner tube 17, then calculates and reachs temperature average value, reduces measuring error.

Preferably, the probes of the plurality of temperature sensors face the surface of the inner cylinder 17 in the direct heating zone and the surface of the inner cylinder 17 in the indirect heating zone, respectively. The problem that only the inner cylinder 17 positioned in the direct heating area or the indirect heating area is measured, so that the deviation between the measurement result and the actual water temperature is large is avoided.

The electromagnetic heating device 33 is disposed on the outer tub 18, the electromagnetic heating device 33 may also be disposed on the casing 19 of the washing machine, and preferably, the electromagnetic heating device 33 is disposed on the inner wall of the outer tub 18. Adopt electromagnetic heating device 33 to heat inner tube 17, and then heat the clothing in the inner tube 17 and the water in the inner tube 17, simple structure, assembly efficiency is high, has improved the practical popularization of product.

The embodiment also provides a control method of the washing machine, wherein a control unit of the washing machine judges the current water temperature in the inner barrel according to the feedback result of the non-contact temperature detection device and controls the on-off of the electromagnetic heating device. The problem that the electromagnetic heating device cannot be cut off in time due to overhigh heating temperature to cause certain potential safety hazards is avoided.

Specifically, the infrared temperature sensor transmits the detected temperature value t to a control unit of the washing machine, the control unit calculates and analyzes to obtain the current water temperature t ', and judges whether the current water temperature t' reaches a set temperature t0, if so, the electromagnetic heating device is controlled to be powered off; if not, controlling the electromagnetic heating device to keep electrifying. The washing machine avoids the problems that the detergent is not sufficiently dissolved due to low water temperature, and the dirty organic matters on the clothes can not be dissolved, so that the washing effect of the washed clothes is reduced, or the clothes are deformed, faded and damaged due to high water temperature or certain damage is caused to the washing machine due to overhigh temperature.

Preferably, the infrared temperature sensors transmit detected temperature values t1, t2, t3, tn to a control unit of the washing machine, the control unit calculates and analyzes water temperatures t1 ', t2 ', t3 ', tn ' in the inner drum, calculates and analyzes current water temperatures t ' ═ t1 ' + t2 ' + t3 ', tn ')/n, judges whether a set temperature t0 is reached or not at the same time, and controls the electromagnetic heating device to be powered off if the set temperature t0 is reached; if not, controlling the electromagnetic heating device to keep electrifying. By adopting the mode of averaging, the current water temperature in the inner barrel is obtained, and the accuracy is higher.

EXAMPLE III

The difference between this embodiment and the first and second embodiments is that the temperature detecting device is used to measure the initial water inlet temperature, and the control unit of the washing machine controls the operation of the heating device according to the current water inlet temperature and water inlet amount.

In conjunction with fig. 4, the present embodiment provides a washing machine including: an inner tub 17 for independently containing washing water when washing laundry; a water intake system in communication with the inner barrel 17; a heating device 33 for heating the water in the inner cylinder 17; and a temperature detection device (not shown in the figure) arranged in the water inlet system for detecting the temperature of the inlet water. The temperature detection device arranged in the water inlet system can detect the temperature of inlet water in real time, and the control system of the washing machine can control the water temperature in the inner barrel 17, so that a better washing effect is achieved.

In the above solution, the washing machine further comprises a flow detection device (not shown in the figure) disposed in the water inlet system for detecting the water inlet amount; preferably, the temperature detection device is a temperature sensor, and the flow detection device is a flow sensor. The water inflow into the inner barrel 17 is measured by the flow sensor, so that a control system of the washing machine can control the water amount in the inner barrel 17 to achieve a good washing effect, and the flow sensor monitors the flow of the water entering the inner barrel 17 in real time. The embodiment adopts the flow sensor to solve the problem of water inflow of the drum washing machine with the non-porous inner drum according to the set water inflow, ensures the washing effect, has simple structure and is convenient to control.

The water inlet system comprises a water inlet pipeline 36 communicated with the inside of the inner barrel 17, and the temperature detection device and the flow detection device are respectively arranged in the water inlet pipeline 36.

Preferably, the water inlet system further comprises a water inlet valve 20 arranged on the water inlet pipeline, the flow sensor monitors the flow rate of the water entering the inner barrel 17 in real time, and the water inlet valve 20 is closed when the set water inlet amount is reached, so that the water entering is completed. The temperature detection device and the flow rate detection device are integrally assembled with the water inlet valve 20, and the three are assembled into a whole and then installed, so that the installation steps are reduced, and the assembly efficiency is improved.

In this embodiment, the washing machine further includes an outer cylinder 18 sleeved outside the inner cylinder 17 and coaxially arranged with the inner cylinder 17, and a housing 19 arranged outside the outer cylinder 18, wherein the heating device 33 is arranged on the outer cylinder 18 or the housing 19; preferably, the heating device is disposed on the inner wall of the outer cylinder 18, and the heating device is an electromagnetic heating device 33. Adopt electromagnetic heating device 33 to heat inner tube 17, and then heat the clothing in the inner tube 17 and the water in the inner tube, simple structure, assembly efficiency is high, has improved the practical popularization of product.

With reference to fig. 5, the present embodiment further provides a control method of a washing machine, when the washing machine performs a water inlet process, a control unit of the washing machine controls the operation of the heating device according to a result detected by the temperature detecting device. The heating device is prevented from being switched off in time due to overhigh heating temperature caused by overlong heating time of the heating device, and certain potential safety hazards are avoided. By adopting the mode of combining the temperature detection device and the heating device, the heating time of the water in the imperforate inner cylinder is controlled, and the problem that the washing effect is influenced or the clothes and the washing machine are damaged due to the fact that the water temperature in the inner cylinder is too low or too high due to too short or too long heating time of the heating device is effectively avoided.

Specifically, the control unit of the washing machine calculates the heating time T of the heating device for the inner barrel when the water in the inner barrel is heated from the initial water temperature to the set water temperature according to the initial water temperature value fed back by the temperature detection device, and stops working after controlling the heating time T of the heating device;

the heating time T of the heating device is as follows:

T＝4.2·(t–t0)·L/3600；

wherein: t is heating time, 4.2 is a constant, T is set water temperature, T0 is an initial water temperature value detected by the temperature detection device, and L is set water inflow.

In order to ensure the accuracy of temperature measurement, the initial water temperature t0 in the inner cylinder can be obtained by adopting an averaging mode, specifically, the initial water temperature t0 is (t1+ t2+ t3+ t4+, tn)/n, wherein n is more than or equal to 3; t 1-tn are different water temperature values detected by the temperature detection device at different time in the water inlet process of the washing machine.

Preferably, the temperature detecting device detects the water temperature value once every certain time interval, so as to further improve the accuracy of the measured initial water temperature t0 and avoid the large deviation between the water temperature value measured in the centralized time and the actual average water temperature value.

When the washing machine executes a water inlet program, the control unit of the washing machine judges whether a set water inlet is reached or not according to the current water inlet fed back by the flow detection device, if so, the water inlet is stopped, and the judgment of whether the heating device is started or not is carried out; if not, water is continuously fed.

In this embodiment, the set water inflow and the set water temperature are set by a user, or are automatically set by a control unit of the washing machine according to the detected current laundry information, where the laundry information includes laundry weight, laundry material, and laundry contamination degree.

Example four

The present embodiment describes the electromagnetic heating device 33 described in the first to third embodiments in detail.

With reference to fig. 1 to 4 and 6, the washing machine includes an outer cylinder 18 coaxially sleeved outside the inner cylinder 17, the heating device 5 is disposed on the outer cylinder 18, and the heating device 5 is an electromagnetic heating device to heat the inside of the outer cylinder 18 and transfer the heating heat to the washing water contained in the inner cylinder 17.

The electromagnetic heating device 33 is provided on the outer cylinder 18 to heat the inner cylinder 17 inside the outer cylinder 18 and the washing water inside the inner cylinder 17 by using electromagnetism, thereby achieving the purpose of adjusting the temperature of the washing water inside the inner cylinder 17 of the washing machine.

In this embodiment, at least a portion of the inner cylinder 17 is made of a metal material, and generates heat by generating an eddy current effect by receiving a magnetic field generated by the electromagnetic heating device 33. The outer cylinder 18 is made of a plastic material that does not excite the eddy current effect in a magnetic field. Preferably, the sidewall of the inner cylinder 17 is made of metal material, and the electromagnetic heating device 33 is correspondingly disposed on the sidewall of the outer cylinder 18.

In this embodiment, the gravity causes the inlet water flowing into the inner cylinder 17 to downwardly converge at the bottom of the inner cylinder 17, so to improve the heating efficiency, the electromagnetic heating device 33 is preferably disposed at the lowest position of the outer cylinder 18 to directly heat the inlet water converged at the bottom of the inner cylinder 17 and adjust the temperature of the washing water in the inner cylinder 17.

In this embodiment, in order to further improve the heating efficiency, the following setting may be performed: a plurality of electromagnetic heating devices 33 are arranged on the outer cylinder 18; preferably, the electromagnetic heating devices 33 are arranged on the side wall of the outer cylinder 18 at certain intervals. By providing a plurality of electromagnetic heating devices 33 on the outer cylinder 18, each heating device 5 can heat the inner cylinder 17 during the rotation of the inner cylinder 17.

In this embodiment, the electromagnetic heating device 33 includes a rectifier 332 and a plastic casing, the plastic casing is hollow to form an installation cavity with an opening on one side, an electromagnetic generator is installed in the installation cavity, preferably, the electromagnetic generator is an electromagnetic heating coil 331, the plastic casing is fixedly installed outside the outer cylinder, and the installation cavity of the plastic casing is opened toward the inside of the outer cylinder, so that an electromagnetic field generated by the electromagnetic generator in the installation cavity is transmitted to the inside of the outer cylinder 18 through the opening, and further, it is ensured that the part of the inner cylinder 17 made of metal material is in a magnetic field, and the metal cylinder is acted by an eddy current effect in the magnetic field to generate heat, so as to heat the washing water in the inner cylinder 17. The flow straightener 332 may be disposed outside the outer barrel 18 or on the inner wall of the outer barrel 18. In this embodiment, be equipped with the binding post that wears out the plastic casing on the electromagnetic generator, binding post wears out and is connected with washing machine's power supply line from the bottom of plastic casing to supply power to the electromagnetic generator.

The heating program is started, the current and voltage are converted into direct current through the rectifier (driver) 332, so that the direct current is converted into high-frequency alternating current exceeding the audio frequency, the high-frequency alternating current is output to the electromagnetic heating coil 331, a high-frequency alternating magnetic field is generated, the electromagnetic induction wire acts on the outer cylinder 18 made of metal, strong eddy current is generated in the inner metal cylinder 17 due to electromagnetic induction, the eddy current overcomes the internal resistance of the inner cylinder 17 and completes the conversion of electric energy into heat energy when flowing, the heating of the inner cylinder 17 is realized, and the purpose of heating the water packaged in the inner cylinder 17 is further realized

In this embodiment, in order to prevent the magnetic field generated by the electromagnetic generator from being transmitted to the outside of the outer cylinder, a shielding device, such as a plurality of magnetic strips, may be further disposed on the plastic casing to isolate the transmission of the magnetic field to the outside of the outer cylinder.

EXAMPLE five

The present embodiment mainly introduces the structure of the flow detection device in the third embodiment in detail, and mainly solves the problem of how to accurately determine the water inflow of the drum washing machine with a non-porous inner drum, and the specific scheme is as follows:

referring to fig. 4 and 7, a drum washing machine includes an inner drum 17 and a water inlet pipeline 36 communicated with the inner drum 17, wherein the inner drum 17 is a non-porous inner drum and holds washing water when washing clothes, and the water inlet pipeline 36 is provided with a flow sensor 1 for detecting water inflow.

In the embodiment, the flow sensor 1 is arranged on the water inlet pipeline 36 to monitor the flow rate of the inlet water, and when the set water inlet amount is reached, the water inlet valve 20 is closed to finish the inlet water. The embodiment adopts the flow sensor to solve the problem of water inlet of the drum washing machine with the non-porous inner drum according to the set water level, ensures the washing effect, has simple structure and is convenient to control.

Further, the drum washing machine of the embodiment includes a water inlet valve 20 and a detergent box 3, the water inlet pipeline 36 includes a first water inlet pipe and a second water inlet pipe, an outlet end of the water inlet valve 20 is communicated with the detergent box 3 through the first water inlet pipe, an outlet end of the detergent box 3 is communicated with the inner drum 17 through the second water inlet pipe, and the flow sensor 1 is disposed on the first water inlet pipe or the second water inlet pipe.

Preferably, the flow sensor 1 is disposed on the first water inlet pipe, so that the detergent in the detergent box can be placed into the flow sensor 1.

The drum washing machine of the embodiment comprises a main controller 4, and the flow sensor 1 is electrically connected with the main controller 4 through a line. The main controller 4 can collect the water inflow of the inner cylinder 17 in real time to reach the set water inflow, and the water inlet valve 20 is closed.

As an implementation manner of this embodiment, the flow sensor 1 is a rotor flow sensor, or a turbine flow sensor, or an ultrasonic flow sensor, or an electromagnetic flow sensor, or an orifice flow sensor.

In this embodiment, the flow sensor 1 may be disposed at any position on the water inlet pipeline, preferably, at the rear portion of the water inlet valve 20, and precisely measures the water flow entering the sealed inner cylinder 17, the flow sensor 1 is connected to the main controller 4 through a line, and the main controller 4 may collect the water inflow of the inner cylinder 17 in real time to set the water inflow and close the water inlet valve 20.

In order to realize water inlet into the imperforate inner barrel, the drum washing machine of the embodiment comprises a driving motor 16 and an inner barrel shaft 13, wherein the driving motor 16 is in transmission connection with the inner barrel 17 through the inner barrel shaft 13 to drive the inner barrel 17 to rotate, a hollow channel 14 communicated with the inside of the inner barrel 17 is arranged in the inner barrel shaft 13, and a water inlet pipeline is communicated with the hollow channel of the inner barrel shaft 13.

Specifically, the inner cylinder shaft 13 is connected with a driving motor 16, the driving motor 16 comprises a stator and a rotor, and the rotor is fixedly connected with the inner cylinder shaft 13; the center of the rotor is provided with a through hole, and the water inlet pipeline penetrates through the through hole of the rotor and is communicated with the hollow channel 14 of the inner cylinder shaft 13.

Furthermore, a first dynamic sealing structure 15 is arranged between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is arranged between the through hole of the rotor and the hollow channel 14 of the inner cylinder shaft 13.

In order to realize the drainage of the imperforate inner cylinder, the drum washing machine of the embodiment comprises an outer cylinder 18, wherein an inner cylinder drainage hole is formed in the side wall of the inner cylinder 17, a normally closed one-way valve plug 11 is installed on the inner cylinder drainage hole, and a push rod mechanism 10 for pushing the one-way valve plug 11 open to drain water is installed on the outer cylinder 18.

In an embodiment of the present invention, the outer cylinder 18 is further provided with a locking mechanism for locking the rotation of the inner cylinder 17, and the locking mechanism pushes the one-way valve plug 11 open to discharge water after the inner cylinder is locked by the push rod mechanism 10.

As another implementation manner of this embodiment, in this embodiment, a plurality of dewatering holes are formed in the side wall of the inner cylinder 17, centrifugal valves are installed on the dewatering holes, and the centrifugal valves are opened under the action of the dewatering centrifugal force to perform washing drainage or dewatering drainage by controlling the inner cylinder to reach a certain rotation speed.

The present embodiment also provides a control method for the drum washing machine, in which the washing machine executes a washing/rinsing procedure, the flow sensor detects a water inlet flow value in real time during a water inlet process, the washing machine calculates a water inlet flow according to the water inlet flow value and the water inlet time, and stops water inlet when the water inlet flow reaches a set water inlet flow of the washing machine.

The drum washing machine is provided with a plurality of water inlet flow values for users to select, and the washing machine carries out water inlet according to the water inlet flow values selected by the users.

The drum washing machine has a clothes weighing function, and can determine the flow value of inlet water according to the weight of clothes to carry out water inlet.

EXAMPLE six

With reference to fig. 8 to 14, a laundry lifting device for a washing machine and a drum washing machine according to the present embodiment are provided.

A laundry lifting device for a washing machine of the present embodiment includes:

a body having a receiving chamber therein;

the water inlet is arranged on the body and communicated with the accommodating chamber;

the centrifugal drainage assembly is arranged in the accommodating chamber;

the initial state of the centrifugal drainage component is a closed state, and the centrifugal drainage component can be opened to drain water under the action of centrifugal force.

The clothes lifting device of the embodiment can be installed on the inner wall of the inner barrel of the drum washing machine, and in the washing process, the clothes are lifted to a certain height along with the rotation of the inner barrel and then are beaten and dropped. In the embodiment, the centrifugal drainage component is integrated in the clothes lifting device, the initial state of the centrifugal drainage component is a closed state, the inner cylinder is kept closed and independently holds washing water, and the centrifugal drainage component can be opened to drain water under the action of centrifugal force, so that the drainage of the drum washing machine with the non-porous inner cylinder is realized.

Therefore, this embodiment sets up centrifugal drainage subassembly in with hoisting device, has not only realized sclausura inner tube drum type washing machine's clothing promotion and drainage, forms the modularization supply of goods moreover, and the production equipment of being convenient for improves the packaging efficiency.

With reference to fig. 9 to 14, the body of the present embodiment includes:

a lift case 3201 having a protrusion on a surface thereof and an open cavity inside thereof;

a lifting base 3208 detachably mounted at an open end of the open cavity of the lifting housing 3201 to form a receiving chamber;

the centrifugal drainage assembly is mounted on a lifting base 3208, and the water inlet 3209 is disposed on the lifting housing 3201 and/or the lifting base 3208.

The lifting device of the present embodiment includes a lifting housing 3201 having a surface with protrusions for lifting the laundry; a poppet base 3208 removably mounted at the open end of the open cavity of the poppet housing 3201 to form a receiving chamber for mounting a centrifugal drainage assembly.

Further, in order to realize centrifugal drainage and installation of the centrifugal drainage assembly, the centrifugal drainage assembly of the embodiment comprises:

the centrifugal piece generates centrifugal motion under the action of centrifugal force;

a sealing plunger 3213 for sealing the water outlet;

the centrifugal piece centrifugally moves to drive the sealing plunger 3213 to move to open the water outlet;

and a plunger through hole for sealing the plunger 3213 to penetrate out of the accommodating chamber is formed in the lifting base 3208.

The centrifugal piece of this embodiment includes connecting portion 3218 and counter weight portion 3217, and counter weight portion 3217 is connected to the one end of connecting portion 3218, and the other end and the rotatable connection of sealed plunger 3213, and the rotatable installation in the middle part of connecting portion 3218 forms lever structure on promoting base 3208.

One end of the connecting portion 3218 of the present embodiment is provided with a first connecting hole 3215 rotatably connected to an end of the sealing plunger 3213, and a second connecting hole 3216 is provided in a middle portion of the connecting portion 3218.

Further, a guide 3214 is installed at the plunger through hole on the lifting base 3208, a guide channel opposite to the plunger through hole is formed in the guide 3214, and the sealing plunger 3213 is disposed in the guide channel and reciprocates along the guide channel, so as to ensure stable reciprocating motion of the sealing plunger 3213, and more accurate resetting of the sealing plunger 3213 can ensure a sealing effect of the water outlet of the inner cylinder.

In the embodiment, a sealing plug 3204 is disposed on the sealing plunger 3213, and an elastic member 3203 for providing an elastic force for restoring the sealing plunger 3213 is sleeved on the sealing plunger 3213, where the elastic member 3203 is a spring.

In order to achieve a fixed connection between the lifting housing 3201 and the lifting base 3208, the lifting base 3208 has a base fixing column 3205, a connecting rib 3219 extending toward the open end is provided in the open cavity of the lifting body 3201, and the base fixing column 3205 is fixedly connected with the connecting rib 3219.

Preferably, the centrifugal drainage assembly is disposed in the middle of the lifting base 3208, and the base fixing posts 3205 include at least two and are symmetrically disposed on both sides of the centrifugal drainage assembly.

Further, base member fixed column 3205 and splice bar 3219 pass through joint structure joint location in this embodiment, base member fixed column 3205 and splice bar 3219 fix a position the back through connecting piece 3207 fixed connection.

Preferably, the connecting rib 3219 is provided with a locking protrusion 3221, the base fixing post 3205 is provided with a channel for the connecting rib to extend into, and a locking groove 3222 engaged with the locking protrusion 3221 is disposed on a peripheral wall of the channel.

In this embodiment, the connecting rib 3219 is provided with a connecting hole, the base fixing post 3205 is provided with a positioning hole opposite to the connecting hole, and the connecting member 3207 passes through the positioning hole and is fixedly connected to the connecting hole, preferably, the connecting member 3207 is a connecting screw.

In order to realize that the lifting device is installed in the inner cylinder, in this embodiment the uncovered both ends of promotion casing 3201 set up the casing fixed column 3202 that is used for fixed assembly lifting device respectively, promotion base 3208 correspond casing fixed column 3202 position department and dodge the setting, the casing fixed column 3202 of this embodiment makes the structure that the lifting device installed in the inner cylinder unchangeable, reduces the learning cost of assembly, improves the packaging efficiency.

Preferably, the lifting base 3208 is a plate-shaped structure covering the open cavity of the lifting housing 3201, two ends of the plate-shaped structure are spaced from the open edge of the lifting housing, respectively, and the housing fixing posts 3202 are correspondingly disposed in the spaces between the two ends.

The lift case 3201 according to the present embodiment includes an annular base portion 3211 and a protrusion portion 3212 integrally formed with the annular base portion 3211 and extending to protrude toward one side.

The water inlet 3209 is arranged on the annular base portion 3211, and the projection portion 3212 is provided with a plurality of spraying holes 3210 communicated with the open cavity.

As shown in fig. 8, the present embodiment also provides a drum washing machine having the laundry lifting device for washing machine, including: an inner cylinder 17; an inner cylinder door 6 openably/closably mounted on a cylinder opening of the inner cylinder 17; when the inner drum door 6 is closed, the inner drum door and the inner drum 17 form an independent washing chamber together, and washing water is independently contained when clothes are washed; the side wall of the inner cylinder 17 is provided with a water outlet, the lifting device 32 is arranged on the water outlet on the inner wall of the inner cylinder 17, and the centrifugal drainage component seals and closes the water outlet.

The drum washing machine of the embodiment has the advantages that the inner drum door 6 is arranged on the opening of the inner drum 17, the inner drum 17 adopts a non-porous drum design, the inner drum and the non-porous drum form an independent washing chamber together, washing water is independently contained when clothes are washed, and washing/rinsing water does not need to be filled between the inner drum and the outer drum, so that the washing water consumption of the washing machine is greatly reduced; the possibility of dirt adhesion between the inner cylinder and the outer cylinder is avoided; the user health and user experience are greatly improved, and water resources are greatly saved.

Furthermore, a fixing hole for fixedly assembling the lifting device 32 is formed in the side wall of the inner cylinder 17, the lifting device 32 is fixed on the fixing hole in a sealing mode through a connecting piece, and the aim of independently containing washing water is achieved by sealing, connecting and keeping the inner cylinder 17 closed.

The control method of the drum washing machine comprises an inner drum, washing water is contained in the inner drum when clothes are washed, a drain hole is formed in the side wall of the inner drum, a lifting device for controlling the on/off of the drain hole is installed on the drain hole, and the control method comprises the following steps: in the washing process of the washing machine, the rotating speed of the inner barrel is controlled to reach or exceed the set rotating speed N0, and the centrifugal drainage component of the lifting device is subjected to centrifugal force to open the drainage hole for inner barrel drainage.

The drainage device of the embodiment adopts the centrifugal drainage component, the control method opens the centrifugal drainage component to realize drainage by controlling the rotation of the inner cylinder to generate centrifugal force, and drainage and dehydration of the drum washing machine with the non-porous inner cylinder are realized by the centrifugal drainage component and a program control mode.

As an implementation manner of this embodiment, after the washing machine executes a washing procedure or a rinsing procedure, the rotation speed of the inner drum is controlled to reach a first rotation speed N1 and is maintained for a set time t1, where N1 is greater than or equal to N0, and N0 is greater than the rotation speed of the inner drum in the washing procedure or the rinsing procedure; when the rotation time of the inner cylinder keeping rotating speed N1 reaches t1, controlling the inner cylinder to stop rotating and entering the next procedure;

preferably, N1 is 110-400 rpm, more preferably 170 + -50 rpm, and still more preferably 150 + -20 rpm;

preferably, t1 ranges between 0.1 and 5 minutes, more preferably between 1 and 2 minutes.

Further, the washing machine includes a weighing device for weighing the weight in the inner tub, the weighing device detects a weight W0 in the inner tub before the inner tub starts to rotate at N1, the weighing device detects a weight W1 in the inner tub after the rotation time reaches t1, and the control system judges whether the water is normally drained according to comparison between W1 and W0.

Further, the control system judges whether the drainage is abnormal or not by comparing the value k of W1/W0, if the k is more than or equal to 0.7, the control system judges that the drainage is abnormal and gives an alarm, and if not, the drainage is normal.

As another implementation manner of this embodiment, after the washing machine performs a washing procedure or a rinsing procedure, the rotation speed of the inner drum is controlled to reach a first rotation speed N1, where N1 is greater than or equal to N0, and N0 is greater than the rotation speed of the inner drum in the washing procedure or the rinsing procedure; and after the water in the inner cylinder is drained, controlling the inner cylinder to stop rotating and entering the next procedure.

Further, the washing machine comprises a weighing device for weighing the weight in the inner barrel, and in the process that the inner barrel is controlled by the washing machine to keep rotating by N1, the control system judges whether the water drainage is finished according to the weight value in the inner barrel detected by the weighing device in real time.

Further, the control system judges whether the drainage is finished according to the weight value in the inner cylinder detected by the weighing device in real time and comprises:

the weighing device detects the weight values W0, W1, W2, … … and Wt in the inner cylinder in real time;

making the weighted values of adjacent time difference, and recording n 1-W1-W0, n 2-W2-W1 and … …, and nt-W (Wt) - (Wt-1);

when nt remains unchanged for a certain time and approaches 0, the drainage is completed.

Furthermore, the control system judges whether the drainage is normal or not by comparing the change conditions of n1, n2, … … and nt, and if n 1-n 2-nt … … -nt-0, the control system judges that the drainage is abnormal and gives an alarm.

Further, the washing machine performs a spinning course in which the minimum spinning speed N2 is equal to or greater than N0.

EXAMPLE seven

The embodiment mainly solves the problem of how to ensure the unbalanced air pressure of the sealed cabin of the drum washing machine with the non-porous inner barrel, and particularly, the water is cut off by a sudden electromagnetic valve, particularly a tap water pipe network to form negative pressure, and washing water in the sealed cabin is backwashed to the pipe network; or the inside has gas, the problem of difficult water intake.

Referring to fig. 15 to 17, the drum washing machine of the present embodiment includes an inner drum 17, the inner drum 17 is a non-porous inner drum, and is used for containing washing water when washing clothes, and further includes an air pressure balancing mechanism for communicating the inner drum 17 with an external environment to balance an air pressure inside the inner drum.

When water enters, the air in the sealed cabin of the inner cylinder is pressurized and can overflow through the balancing mechanism, so that the air pressure balance is ensured.

When water is cut off suddenly, external atmosphere can enter the sealed cabin of the inner barrel rapidly, suck back is damaged, air pressure balance is guaranteed, and washing water is prevented from being sucked into a tap water pipe network.

Other air pressure balancing mechanisms can also ensure the air pressure balance of the inner cylinder during dehydration.

As an implementation manner of this embodiment, the air pressure balancing mechanism includes a pressure equalizing hole 27 disposed on the inner barrel 17, and one end of the pressure equalizing hole 27, which is communicated with the inside of the inner barrel 17, is disposed on the inner barrel 17 at a position close to the central rotation axis and is always higher than the highest water level position in the inner barrel 17.

The drum washing machine of the embodiment comprises a driving motor 16 and an inner drum shaft 13, wherein the driving motor 16 is in transmission connection with the inner drum 17 through the inner drum shaft 13 to drive the inner drum 17 to rotate, a pressure equalizing pore passage 27 is formed in the inner drum shaft 13 to communicate the inside of the inner drum 17 with the external environment, and the highest water level in the inner drum 17 is lower than that of the inner drum shaft 13. Thus, the water in the inner cylinder can be prevented from flowing out of the pressure equalizing pore passage.

The drum washing machine of the embodiment comprises an outer drum 18, wherein the inner drum 17 is arranged inside the outer drum 18, water discharged from the inner drum 17 is discharged through the outer drum 18, an inner drum door 6 for sealing the inner drum is arranged at the opening of the inner drum 17, the opening of the outer drum 18 is open, one end of a pressure equalizing channel 27 is communicated with the inside of the inner drum 17, and the other end of the pressure equalizing channel is arranged inside the outer drum 18 and communicated with the inside of the outer drum 18. In this way, the bore effluent is prevented from being collected within the outer cartridge 18.

Furthermore, in this embodiment, an inner cylinder drain hole is formed in a side wall of the inner cylinder 17, a normally closed one-way valve plug 11 is installed on the inner cylinder drain hole, and a push rod mechanism 10 for pushing the one-way valve plug 11 open to drain water is installed on the outer cylinder 18.

Preferably, a locking mechanism for locking the rotation of the inner cylinder is further arranged on the outer cylinder 18, and the push rod mechanism pushes the one-way valve plug open for drainage after the locking mechanism locks the inner cylinder.

Further, the drum washing machine of the present embodiment includes a water inlet pipeline, the inner drum shaft 13 has a hollow channel 14 therein, which is communicated with the inside of the inner drum 17, and the water inlet pipeline is communicated with the hollow channel 14 of the inner drum shaft 13; the pressure equalizing pore passage 27 and the hollow channel 14 are respectively communicated with the inside of the inner cylinder 17 and are arranged in a mutually isolated way. Thus, the gas in the sealed cabin of the inner cylinder can be smoothly discharged to keep the air pressure in the inner cylinder balanced, and simultaneously, the water leakage caused by the direct discharge of the inlet water from the pressure equalizing pore passage 27 can be prevented.

Specifically, the hollow channel 27 extends from one end to the other end along the central axis direction of the inner cylinder shaft, the pressure equalizing channel includes a first channel section and a second channel section, the first channel section is arranged in parallel with the hollow channel, one end of the first channel section is communicated with the inside of the inner cylinder, one end of the second channel section is communicated with the first channel section, and the other end of the second channel section extends to the peripheral wall of the inner cylinder shaft and is communicated with the inside of the outer cylinder.

Preferably, the second pore channel section and the first pore channel section are vertically arranged to form an L-shaped pressure equalizing pore channel.

Further, the inner cylinder shaft 13 is connected with a driving motor 16, the driving motor 16 comprises a stator and a rotor, and the rotor is fixedly connected with the inner cylinder shaft; the center of the rotor is provided with a through hole, and the water inlet pipeline penetrates through the through hole of the rotor to be communicated with the hollow channel of the inner cylinder shaft.

Preferably, a first dynamic sealing structure is arranged between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is arranged between the through hole of the rotor and the hollow channel of the inner cylinder shaft.

The drum type washing machine of this embodiment, set up a plurality of dehydration holes on the lateral wall of inner tube 17, all install the centrifugal valve on the dehydration hole, the centrifugal valve open under the effect of dehydration centrifugal force and dewater the drainage.

Example eight

Referring to fig. 18 to 22, the drum washing machine of the present embodiment includes an inner drum 17, the inner drum 17 is a non-porous inner drum, and holds washing water when washing laundry, and further includes a pressurization mechanism and/or a pressure release mechanism for communicating the inner drum with an external environment to balance an internal air pressure of the inner drum 17.

The pressurizing mechanism described in this embodiment includes a pressurizing duct 28 and a negative pressure safety valve 29, the negative pressure safety valve 29 is disposed on the pressurizing duct 28, and is used for conducting the pressurizing duct 28 in one way when the internal pressure of the inner cylinder 17 is smaller than the atmospheric pressure of the external environment, the external environment gas enters the inner cylinder 17 from the pressurizing duct 28 to be pressurized until the internal pressure of the inner cylinder 17 is balanced with the atmospheric pressure of the external environment, and the negative pressure safety valve 29 is closed.

The pressure relief mechanism described in this embodiment includes a pressure relief hole 30 and a positive pressure safety valve 31, the pressure relief hole 30 is disposed at a position close to the rotation center axis on the inner cylinder 17 and is always higher than the highest water level position in the inner cylinder 17, the positive pressure safety valve 31 is disposed on the pressure relief hole 30, and is used for conducting the pressure relief hole 30 in one way for pressure relief when the internal pressure of the inner cylinder 17 is greater than the atmospheric pressure of the external environment, until the internal pressure of the inner cylinder 17 is balanced with the atmospheric pressure of the external environment, and the positive pressure safety valve 31 is closed.

Referring to fig. 19, when water enters, the air in the sealed cabin of the inner cylinder 17 is pressurized, and once the pressure is greater than the set value of the positive pressure safety valve, the positive pressure safety valve is opened and can overflow through the pressure relief pore passage, so that the air pressure balance is ensured.

As shown in fig. 19, when water is suddenly cut off, the air in the sealed cabin of the inner cylinder 17 is pressurized, once the air is smaller than the set value of the positive pressure safety valve, the external atmosphere can rapidly enter the sealed cabin and destroy the suck-back, so that the air pressure balance is ensured, and the washing water is prevented from being sucked into a tap water pipe network. Other air pressure balancing mechanisms can also ensure the air pressure balance of the inner cylinder during dehydration.

The drum washing machine of the embodiment comprises a driving motor 16 and an inner drum shaft 13, wherein the driving motor 16 is in transmission connection with the inner drum 17 through the inner drum shaft 13 to drive the inner drum 17 to rotate, a pressurizing pore channel 28 and/or a pressure relief pore channel 30 are/is formed in the inner drum shaft 13 to communicate the inside of the inner drum 17 with the external environment, and the highest water level in the inner drum 17 is lower than the inner drum shaft 13.

The drum washing machine of the embodiment comprises an outer drum 18, wherein an inner drum 17 is arranged inside the outer drum 18, water discharged from the inner drum 17 is discharged from the outer drum 18, an inner drum door 6 for sealing the inner drum is installed at a drum opening of the inner drum 17, the drum opening of the outer drum 18 is opened, one end of a pressurizing pore passage 28 and/or a pressure relief pore passage 30 is communicated with the inside of the inner drum 17, and the other end of the pressurizing pore passage and/or the pressure relief pore passage 30 is arranged inside the outer drum 18 and.

The drum washing machine of the embodiment comprises a water inlet pipeline, wherein a hollow channel 14 communicated with the inside of an inner drum 17 is arranged in an inner drum shaft 13, and the water inlet pipeline is communicated with the hollow channel 14 of the inner drum shaft 13; the pressure relief duct 30 and the hollow channel 14 are respectively communicated with the interior of the inner cylinder 17 and are arranged in an isolated manner.

With reference to fig. 21 and 22, the hollow channel 14 extends from one end to the other end along the central axis of the inner cylinder shaft 13, the pressure relief duct 30 includes a first duct section and a second duct section, the first duct section is disposed in parallel with the hollow channel, one end of the first duct section is communicated with the inside of the inner cylinder, one end of the second duct section is communicated with the first duct section, and the other end of the second duct section extends to the outer peripheral wall of the inner cylinder shaft and is communicated with the inside of the outer cylinder;

preferably, the second duct section and the first duct section are arranged perpendicularly to form an L-shaped pressure relief duct.

The drum washing machine of the embodiment comprises a water inlet pipeline, wherein a hollow channel 14 communicated with the inside of an inner drum 17 is arranged in an inner drum shaft 13, and the water inlet pipeline is communicated with the hollow channel 14 of the inner drum shaft 13; the pressurizing port 28 communicates with the hollow passage 14.

Further, the hollow passage 14 extends from one end to the other end along the central axis direction of the inner cylinder shaft 13, one end of the pressurizing duct 28 is communicated with the hollow passage 14, and the other end extends to the outer peripheral wall of the inner cylinder shaft 13 and is communicated with the inside of the outer cylinder 18. Preferably, the pressurizing port 28 and the hollow passage 14 are arranged perpendicular to each other.

The inner cylinder shaft is connected with the driving motor, the driving motor comprises a stator and a rotor, and the rotor is fixedly connected with the inner cylinder shaft; the center of the rotor is provided with a through hole, and the water inlet pipeline penetrates through the through hole of the rotor to be communicated with the hollow channel of the inner cylinder shaft.

Referring to fig. 21 and 22, the pressurizing port 28 and the pressure releasing port 30 are both disposed on the inner shaft 13, and the openings for communicating with the atmosphere are both inside the outer cylinder 18; the openings of the sealed cabins communicated with the inner cylinder 17 are all arranged at the inner side of the water inlet channel 14 of the inner cylinder shaft 13. It is conceivable that the preferred pressurizing port 28 and the pressure relief port 30 are both provided on the inner cylinder shaft 13, and that the openings for communicating the atmosphere are both inside the outer cylinder 18; the openings of the sealed cabin communicated with the inner cylinder 17 are all arranged at the inner side of the sealed cabin.

The above embodiments may be implemented individually or in combination with each other.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A washing machine, characterized by comprising:

an inner tub for independently containing washing water when washing clothes;

the water inlet system is communicated with the inner barrel;

the heating device heats the water in the inner cylinder;

2. The washing machine as claimed in claim 1, further comprising a flow rate detecting device provided in the water inlet system to detect the amount of the inlet water;

3. The washing machine as claimed in claim 1, wherein the water inlet system includes a water inlet pipeline communicated with the inside of the inner tub, and the temperature detecting device and the flow detecting device are respectively provided in the water inlet pipeline;

4. The washing machine as claimed in claim 1, further comprising an outer tub disposed coaxially with the inner tub and fitted around the outside of the inner tub, and a casing disposed outside the outer tub, wherein the heating device is disposed on the outer tub or the casing;

5. A control method of a washing machine having any one of claims 1 to 4, wherein when the washing machine performs a water inlet process, a control unit of the washing machine controls the operation of the heating means according to the result detected by the temperature detecting means.

6. The control method of the washing machine according to claim 5, wherein the control unit of the washing machine calculates a heating time T of the inner tub required by the heating device to heat the water in the inner tub from the initial water temperature to the set water temperature according to the initial water temperature value fed back by the temperature detection device, and stops the operation after controlling the heating time T of the heating device;

the heating time T of the heating device is as follows:

T＝4.2·(t–t0)·L/3600；

7. The control method of a washing machine as claimed in claim 6, wherein the initial water temperature t0 ═ (t1+ t2+ t3+ t4+, tn)/n, where n ≧ 3; t 1-tn are different water temperature values detected by the temperature detection device at different time in the water inlet process of the washing machine;

8. The control method of a washing machine according to claim 5, wherein when the washing machine performs a water inlet process, the control unit of the washing machine determines whether a set water inlet amount is reached according to a current water inlet amount fed back by the flow detection device, and if so, stops water inlet and makes a determination whether to activate the heating device; if not, water is continuously fed.

9. The control method of a washing machine as claimed in claim 8, wherein the control unit of the washing machine determines whether to activate the heating means according to whether a user selects to activate the heating course.

10. The control method of a washing machine according to claim 9, wherein when the user selects to start the heating process, the control unit of the washing machine further determines whether the initial water temperature detected by the current temperature detecting device reaches the set water temperature, and if so, executes the washing process; if not, the heating device is started.