CN112144219B - Washing machine and control method thereof - Google Patents

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 electromagnetic heating device is used for heating the water in the inner cylinder; a temperature detection device for detecting the water temperature in the inner cylinder; or detecting the temperature of the inner cylinder; alternatively, the temperature at a location some distance outside the inner barrel is detected. 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 invention realizes the control of the water temperature of the washing machine with the non-porous inner barrel by combining the electromagnetic heating device and the temperature detection device, and effectively avoids the influence on the normal work of the washing machine due to the over-low or over-high heating water temperature.

Description

A washing machine and its control method

technical field

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

Background technique

Washing machine is one of household appliances more commonly used in people's daily life. The use of washing machine brings convenience to people's life. In the drum washing machine in the prior art, the outer cylinder holds water, and the inner cylinder is rotated for washing. The wall of the inner cylinder is provided with holes for feeding washing water into the inner cylinder or for dehydrating the clothes in the inner cylinder. The flow between the inner and outer cylinders will cause dirt and scale to accumulate between the inner and outer cylinders, causing a large number of bacteria to multiply, causing secondary pollution to clothes, and seriously threatening the health of consumers. The filling of the water in the space causes useless water waste, therefore, people have designed the non-porous inner drum washing machine.

With the continuous improvement of people's quality of life, people have higher and higher requirements for the washing effect of washing machines. Therefore, the user generally heats the washing water during the washing process, which not only improves the decontamination ability of the detergent, but also sterilizes and disinfects the clothes. The conventional heating device is installed on the outer cylinder of the washing machine to heat the water between the inner cylinder and the outer cylinder of the washing machine. However, since the non-porous inner cylinder washing machine has no water between the inner cylinder and the outer cylinder, the inner cylinder cannot Therefore, how to heat the washing water in the inner drum of the washing machine without a hole in the inner drum is an urgent problem to be solved by those skilled in the art.

Moreover, since it is difficult to control the heating temperature during the heating process, it is very easy to cause the water temperature to be too high. Excessive water temperature will not only cause irreversible damage to some clothes, but also consume a lot of power when heated to a higher temperature. , causing excessive waste of electricity, therefore, how to control the water temperature in the non-porous inner drum washing machine is also a problem urgently needed to be solved by those skilled in the art.

In view of this, the present invention is proposed.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art. The present invention provides a washing machine and its control method, which directly or indirectly heats the washing water in the inner drum through the provided electromagnetic heating device, and also through the provided electromagnetic heating device. The non-contact temperature detection device realizes the monitoring of the temperature of the washing water to prevent the temperature from being too high and causing damage to the clothes and the washing machine.

In order to achieve this object, the present invention adopts following technical scheme:

A washing machine, comprising:

The inner cylinder holds the washing water independently when washing clothes;

An electromagnetic heating device for heating the water in the inner cylinder;

The temperature detection device detects the water temperature in the inner cylinder; or, detects the temperature of the inner cylinder; or, detects the temperature at a certain distance outside the inner cylinder.

Further, it also includes an outer cylinder sleeved on the outside of the inner cylinder and coaxially arranged with the inner cylinder, and the temperature detection device is arranged on the electromagnetic heating device;

Or, set it on the outer cylinder;

Or, set it at any position between the inner cylinder and the outer cylinder.

Further, the temperature detection device and the electromagnetic heating device are respectively electrically connected to the main controller of the washing machine;

Preferably, the temperature detection device is a temperature sensor, and the electromagnetic heating device is an electromagnetic heating coil.

Further, the temperature sensor is a resistance temperature detector; or, a semiconductor sensor; or, an NTC temperature sensor.

Further, the electromagnetic heating device is arranged on the outer cylinder; preferably, the electromagnetic heating device is arranged on the inner wall of the outer cylinder.

Further, the heating area of the inner cylinder corresponding to the electromagnetic heating device is divided into a direct heating area and an indirect heating area, and the temperature detection device is arranged on the inner wall of the outer cylinder corresponding to the direct heating area or the indirect heating area;

Preferably, the temperature detection device is arranged on the inner wall of the outer cylinder corresponding to the indirect heating zone;

More preferably, both the temperature detection device and the electromagnetic heating device are arranged on the inner wall of the outer cylinder, the temperature detection device is arranged at the position farthest from the axial distance of the electromagnetic heating device, and the projections of the two on the cross section of the outer cylinder fall on both endpoints of the same diameter.

Further, there are multiple temperature sensors, which are respectively electrically connected to the main controller of the washing machine, and the multiple temperature sensors are arranged on the inner wall of the outer cylinder at a certain distance;

Preferably, the temperature sensors are evenly distributed on the inner wall of the outer cylinder corresponding to the direct heating zone and on the inner wall of the outer cylinder corresponding to the indirect heating zone.

The invention also provides a control method of the washing machine. The control unit of the washing machine judges the current water temperature in the inner cylinder according to the feedback result of the temperature detection device, and controls the on-off of the electromagnetic heating device.

Further, the temperature sensor transmits the detected temperature value t to the control unit of the washing machine, and the control unit calculates and analyzes the current water temperature t′, and judges whether the set temperature t0 is reached, and if so, controls the electromagnetic heating device Power off; if not, then control the electromagnetic heating device to keep the power on;

Among them, the current water temperature t'=xt+c, x is a coefficient, and c is a constant.

Further, there are multiple temperature sensors, and the multiple temperature sensors transmit the detected temperature values t1, t2, t3,,, tn to the control unit respectively, and the control unit calculates and analyzes the temperature in the inner cylinder Water temperature t1', t2', t3',,, tn', calculate the current water temperature t'=(t1'+t2'+t3'+,,,tn')/n, and judge whether it reaches the set temperature t0 , if so, control the electromagnetic heating device to power off; if not, control the electromagnetic heating device to keep the power on;

Wherein, the current water temperature tn'=x·tn+c, x is a coefficient, c is a constant, and n≥1.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

1. The washing machine provided by the present invention realizes the control of the water temperature in the non-porous inner cylinder by adopting the combination of the temperature detection device and the electromagnetic heating device, which effectively avoids the influence of washing due to the low or high water temperature in the inner cylinder. Effect or cause damage to laundry and washing machine.

2. The washing machine provided by the present invention uses an electromagnetic heating device to heat the inner cylinder, thereby heating the clothes in the inner cylinder and the water in the inner cylinder. The structure is simple, the assembly efficiency is high, and the practical promotion of the product is improved.

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the drum washing machine of Embodiment 1 or Embodiment 2 of the present invention;

Fig. 2 is another schematic diagram of the drum washing machine in Embodiment 1 or Embodiment 2 of the present invention;

Fig. 3 is a schematic diagram of the principle of the drum washing machine in Embodiment 2 of the present invention;

Fig. 4 is a schematic diagram of the principle of a drum washing machine according to Embodiment 3 of the present invention;

5 is a flow chart of a control method for a drum washing machine according to Embodiment 3 of the present invention;

6 is a schematic structural view of an electromagnetic heating device according to Embodiment 4 of the present invention;

Fig. 7 is a schematic diagram of the principle of a drum washing machine according to Embodiment 5 of the present invention;

Fig. 8 is a schematic diagram of the principle of the drum washing machine according to Embodiment 6 of the present invention;

Fig. 9 is a three-dimensional structural schematic diagram of a laundry lifting device for a washing machine according to Embodiment 6 of the present invention;

Fig. 10 is the second schematic diagram of the three-dimensional structure of the clothes lifting device for the washing machine according to the sixth embodiment of the present invention;

Fig. 11 is a front view of a clothes lifting device for a washing machine according to Embodiment 6 of the present invention;

Fig. 12 is a cross-sectional view of the clothes lifting device for a washing machine according to Embodiment 6 of the present invention along plane A-A in Fig. 11;

Figure 13 is a cross-sectional view of the laundry lifting device for a washing machine according to Embodiment 6 of the present invention along the B-B plane in Figure 11 (implementation mode 1);

Figure 14 is a cross-sectional view of the laundry lifting device for a washing machine according to Embodiment 6 of the present invention along the B-B plane in Figure 11 (implementation mode 2);

Fig. 15 is a schematic diagram of the principle of the drum washing machine according to Embodiment 7 of the present invention;

Fig. 16 is a partially enlarged view in Fig. 15 (pressure relief state) of the drum washing machine according to Embodiment 7 of the present invention;

Fig. 17 is a partially enlarged view in Fig. 15 of the drum washing machine according to Embodiment 7 of the present invention (pressurized state);

Fig. 18 is a schematic diagram of the principle of the drum washing machine according to Embodiment 8 of the present invention;

Fig. 19 is a partially enlarged view in Fig. 18 of the drum washing machine according to Embodiment 8 of the present invention (pressure relief state of Embodiment 1);

Fig. 20 is a partially enlarged view in Fig. 18 of the drum washing machine according to Embodiment 8 of the present invention (pressurized state of Embodiment 1);

Fig. 21 is a partially enlarged view in Fig. 18 of the drum washing machine according to Embodiment 8 of the present invention (pressure relief state of Embodiment 2);

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

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , but not to limit the scope of the present invention.

As shown in Figures 1-22, this embodiment provides a front-loading drum washing machine with a non-porous inner cylinder, which has a simple structure and can greatly reduce the need for filling washing/rinsing water between the inner cylinder and the outer cylinder. The washing water consumption of the washing machine. The possibility of dirt adhesion between the inner cylinder and the outer cylinder is avoided. It greatly improves user health and user experience, and greatly saves water resources.

The drum washing machine of this embodiment has a casing 19, and the casing 19 includes: a top panel 2, a front panel, a back panel and a bottom panel. Footings 9 are installed and fixed on the bottom plate for supporting the whole washing machine. The casing 19 has an outer cylinder 18 inside, and an inner cylinder 17 is coaxially arranged inside the outer cylinder 18 . The main purpose of the outer cylinder 18 is to collect the drainage of the inner cylinder 17 and the drainage of the inner cylinder 17 for high-speed centrifugal dehydration. The inner tube 17 is rotated, preferably a lifting rib is provided to continuously lift, drop and beat the clothes, so that the clothes can be washed. The inner cylinder 17 is non-porous. The outer cylinder 18 has a center mounting hole, and the bearing 12 is installed and fixed. The inner cylinder shaft 13 fastened to the inner cylinder 17 passes through the shown bearing 12 and connects to the drive motor 16 . An openable/closable inner cylinder door 6 is installed on the mouth of the front part of the inner cylinder 17, so that the inner cylinder 17 is a sealed cabin structure. The machine door 5 that can open/close is installed on the shell 19.

Embodiment one

This embodiment mainly solves the problem that when the non-porous inner drum washing machine executes the heating program, the heating temperature cannot be well controlled, resulting in low water temperature, which affects the washing effect; or high water temperature, causing damage to the clothes.

With reference to Figure 1 and Figure 2, this embodiment provides a washing machine including: an inner cylinder 17, which holds the washing water independently when washing clothes, avoiding the accumulation of dirt and bacterial growth caused by the accumulation outside the inner cylinder 17 and the overflow of washing water problem; the electromagnetic heating device 33 heats the inner cylinder 17, and then heats the washing water in the inner cylinder 17 to enhance the decontamination ability, and at the same time the heated washing water can also sterilize the clothes; the temperature detection device 34 directly detects the inner The water temperature in the cylinder 17, or the temperature of the inner cylinder 17 is detected, or the temperature at a certain distance outside the inner cylinder 17 is detected. The temperature detection device 34 and the electromagnetic heating device 33 are respectively electrically connected to the main controller 4 of the washing machine, and the main controller 4 of the washing machine determines the water temperature in the inner cylinder 17 according to the temperature value detected by the temperature detection device 34 , and then control the operation of the electromagnetic heating device 33 .

The washing machine provided in this embodiment also includes an outer cylinder 18 sheathed on the outside of the inner cylinder 17 and coaxially arranged with the inner cylinder 17, and the temperature detection device 34 can be assembled with the electromagnetic heating device 33, which simplifies the installation steps; or , directly fixedly installed on the outer cylinder 18, preferably, arranged on the inner wall of the outer cylinder 18, and indirectly determine the temperature of the water in the inner cylinder 17 by detecting the temperature of the outer cylinder 18; or, it can also be fixedly installed in the inner cylinder through a fixed structure 17 and the outer cylinder 18, the temperature detection device 34 is closer to the inner cylinder 17, and the measured temperature value is closer to the water temperature in the inner cylinder 17. By detecting the temperature between the inner cylinder 17 and the outer cylinder 18, the temperature is indirectly Determine the temperature of the water in the inner cylinder 17.

In this embodiment, the temperature detection device 34 is a temperature sensor, which detects the water temperature in the inner cylinder 17 through the temperature sensor, provides the current temperature for the main controller 4, and ensures that the main controller 4 controls the water temperature in the inner cylinder 17. Control to achieve better washing effect. The temperature sensor is a resistance temperature detector; or, a semiconductor sensor; or, a thermocouple; or, an NTC temperature sensor. More preferably, it is an NTC temperature sensor, which is formed by connecting a thermistor with a negative temperature coefficient and a wire, and the resistance value of the NTC thermistor decreases rapidly as the temperature rises under a certain measurement power. Using this feature, the NTC thermistor can determine the corresponding temperature by measuring its resistance value, and transmit it to the main controller 4 of the washing machine through the signal line 34, so as to achieve the purpose of detecting and controlling the water temperature in the inner cylinder 17.

In this embodiment, the electromagnetic heating device 33 includes an electromagnetic heating coil 331 and a rectifier 332. The heating program is started, and the current and voltage are converted into direct current through the rectifier (driver) 332, so that the direct current becomes a high-frequency alternating current exceeding audio frequency, and the high-frequency The alternating current is output to the electromagnetic heating coil 331, thereby generating a high-frequency alternating magnetic field, and its electromagnetic induction line acts on the metal outer cylinder 18, and a strong eddy current is generated in the metal inner cylinder 17 due to electromagnetic induction, and the eddy current When the internal resistance of the inner cylinder 17 is overcome and the flow is completed, the conversion of electric energy to heat energy is completed, the inner cylinder 17 is heated, and the purpose of heating the water encapsulated in the inner cylinder 17 is realized.

The electromagnetic heating device 33 is arranged on the outer cylinder 18, and the electromagnetic heating device 33 can also be arranged on the casing 19 of the washing machine. Preferably, as shown in FIG. 1 , the electromagnetic heating device 33 is arranged on the inner wall of the outer cylinder 18 . The electromagnetic heating device 33 is used to heat the inner cylinder 17, thereby heating the clothes in the inner cylinder 17 and the water in the inner cylinder 17. The structure is simple, the assembly efficiency is high, and the practical promotion of the product is improved.

In this embodiment, the heating area corresponding to the electromagnetic heating device 33 of the inner cylinder 17 is divided into a direct heating area and an indirect heating area. In order to make the heating more uniform, the inner cylinder 17 is controlled to rotate while the electromagnetic heating device 33 is started, increasing The area of the inner cylinder 17 that is directly heated makes the heating more uniform at the same time. The inner cylinder 17 located within the heating range of the electromagnetic heating device 33 is divided into a direct heating zone, and the inner cylinder 17 that is heated through heat transfer is divided into an indirect heating zone. 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 as to be subjected to the magnetic field generated by the electromagnetic heating device 33 to generate eddy current effect to generate heat, and transfer the heating heat to the water in the inner cylinder 17 to improve The water temperature enhances the washing effect of the washing machine.

Preferably, the temperature detection device 34 is arranged on the inner wall of the outer cylinder 18 corresponding to the indirect heating zone. Since the temperature of the water in the inner cylinder 17 in the direct heating zone is much higher than the actual water temperature, the temperature detection device 34 It is more accurate to measure the water temperature in the inner cylinder 17 by setting it on the inner wall of the outer cylinder 18 corresponding to the indirect heating zone.

More preferably, as shown in FIG. 2, the temperature detection device 34 and the electromagnetic heating device 33 are both arranged on the circumference of the inner wall of the outer cylinder 18, and the temperature detection device 34 is arranged at the position farthest from the axial distance 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 endpoints of the same diameter. The temperature detection device 34 is arranged at the farthest end from the electromagnetic heating device 34 to measure the water temperature in the inner cylinder 17 with small error and more accuracy.

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 cylinder 18 to measure the water temperature in the inner cylinder 17 at the same time. The plurality of temperature sensors are respectively electrically connected to the main controller 4, and the The temperature sensors are arranged on the inner wall of the outer cylinder 18 at intervals to obtain multiple temperature values at different positions of the inner cylinder 17, and then calculate the average temperature to reduce measurement errors.

Preferably, the temperature sensors are evenly distributed on the inner wall of the outer cylinder 18 corresponding to the direct heating zone and on the inner wall of the outer cylinder 18 corresponding to the indirect heating zone, so as to avoid measuring the temperature of the water only in the direct heating zone or the non-direct heating zone , resulting in a large deviation between the measured result and the actual water temperature.

This embodiment also provides a washing machine control method. The control unit of the washing machine determines the current water temperature in the inner cylinder according to the feedback result of the temperature detection device, and controls the electromagnetic heating device to be turned on and off. It avoids that the heating temperature is too high, and the electromagnetic heating device cannot be cut off in time, causing certain potential safety hazards.

Specifically, the temperature sensor transmits the detected temperature value t to the control unit of the washing machine, and the control unit calculates and analyzes the current water temperature t′, and judges whether the set temperature t0 is reached, and if so, controls the electromagnetic heating device Power off; if not, then control the electromagnetic heating device to keep the power on. Wherein, the current water temperature t'=xt+c, x is a coefficient, and c is a constant. It avoids insufficient detergent dissolution caused by low water temperature, and inability to dissolve the dirty organic substances on the clothes, resulting in a decrease in the cleaning effect of the washed clothes, or high water temperature that causes deformation, fading, damage of clothes or excessive temperature on the washing machine cause some damage.

Preferably, there are multiple temperature sensors, and the multiple temperature sensors transmit the detected temperature values t1, t2, t3, ,, tn to the control unit of the washing machine, and the control unit calculates and analyzes the inner tub Calculate the current water temperature t'=(t1'+t2'+t3'+,,,tn')/n, and judge whether it reaches the set value Temperature t0, if yes, control the electromagnetic heating device to power off; if not, control the electromagnetic heating device to keep the power on. Wherein, the current water temperature tn′=x·tn+c, x is a coefficient, c is a constant, and n is an integer greater than or equal to 1. By adopting the method of averaging, the current water temperature in the inner cylinder is obtained, and the accuracy is higher.

Embodiment two

This embodiment is an improvement made on the basis of the first embodiment. A non-contact temperature detection device is used, and the temperature measurement result is more accurate.

With reference to Figure 1, Figure 2, and Figure 3, this embodiment provides a washing machine, including: an inner cylinder 17, which independently holds the washing water when washing clothes, avoiding the accumulation of dirt outside the inner cylinder 17 and the overflow of washing water Accumulation and bacterial growth problems; electromagnetic heating device 33, heats the water in the inner cylinder 17, enhances the decontamination ability, and at the same time, the heated washing water can also sterilize the clothes; non-contact temperature detection device 37, detects the inner cylinder The water temperature in 17, or, detect the temperature of inner cylinder 17, the non-contact temperature detection device that present embodiment adopts is high in precision, and resolution is high, and response time is fast, need not directly contact inner cylinder 17, or the water in inner cylinder 17, It is possible to accurately measure the inner cylinder 17 or the water temperature in the inner cylinder 17, and the non-contact temperature detection device 37 and the electromagnetic heating device 33 are respectively electrically connected to the main controller 4 of the washing machine. The main controller 4 of the washing machine determines the water temperature in the inner cylinder 17 according to the temperature value detected by the non-contact temperature detection device 37 , and then controls the operation of the electromagnetic heating device 33 .

Since the non-contact temperature detection device 37 does not need to be in direct contact with the detected object, its setting position is more flexible, unrestricted, and easy to install. The non-contact temperature detection device 37 can be combined with the electromagnetic heating device 33 assembled in one set to simplify the installation steps; or, it also includes an outer cylinder 18 that is sleeved outside the inner cylinder 17 and coaxially arranged with the inner cylinder 17, or is directly fixed and installed on the outer cylinder 18, preferably on the outer cylinder 18; or, it also includes a housing 19 disposed outside the outer cylinder 18, and the non-contact temperature detection device 37 is disposed on the housing 19.

In this implementation, the non-contact temperature detection device 37 is a non-contact temperature sensor, which detects the water temperature in the inner cylinder 17 through the temperature sensor, and provides the current temperature for the main controller 4, so as to ensure that the main controller 4 controls the inner cylinder. 17 to control the water temperature 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 measurement 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 photodetector, a signal amplifier, and signal processing. The optical system gathers the target infrared radiation energy in its field of view, and the size of the field of view is determined by the optical parts of the thermometer and its position. Infrared energy is focused on a photodetector and converted into a corresponding electrical signal. The signal passes through the amplifier and signal processing circuit, and is converted into the temperature value of the measured target after being corrected according to the algorithm inside the instrument and the target emissivity. And transmit it to the main controller 4 of the washing machine through the signal line 35, so as to achieve the purpose of detecting and controlling the water temperature in the inner cylinder 17.

The infrared temperature sensor can measure the temperature on the surface of the inner cylinder 17, and then indirectly obtain the water temperature in the inner cylinder 17, or can also directly measure the temperature of the water in the inner cylinder 17, specifically, set it on the body of the inner cylinder 17 An infrared window, the detection head of the infrared temperature sensor detector directly measures the temperature of the water in the inner tube 17 through the infrared window, the infrared window is an optical window that can pass through ultraviolet rays, visible light, and infrared rays, and the infrared The window is installed on the cylinder body of the inner cylinder 17, so that the infrared imaging temperature measurement of the inner cylinder 17 in the closed operation state can be realized, and then the purpose of directly measuring the water temperature in the inner cylinder 17 can be realized.

In this embodiment, the inner cylinder 17 includes an inner cylinder door 6, the inner cylinder door 6 can be opened/closed and installed on the mouth of the inner cylinder for putting clothes etc., the infrared temperature sensor is arranged on the outer cylinder 18 inner wall, its detection head is towards inner cylinder 17 cylinder surface. Or, as shown in FIG. 3, the infrared temperature sensor is arranged on the openable/closeable door 5 installed on the casing 19, and the detection head of the infrared sensor detector is directly facing the surface of the inner cylinder door 6, and then, The water temperature in the inner cylinder 17 is measured indirectly.

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 make the heating more uniform, the inner cylinder 17 is controlled to rotate while the electromagnetic heating device 33 is started, so as to increase the direct heating of the inner cylinder 17. area, while making the heating more uniform, the inner cylinder 17 located within the heating range of the electromagnetic heating device 33 is divided into a direct heating zone, and the inner cylinder 17 heated by heat transfer is divided into an indirect heating zone, and the infrared temperature sensor detects The detection head of the detector faces the cylinder surface of the inner cylinder 17 in the indirect heating zone. Because the water temperature of the inner cylinder 17 of the direct heating zone is much higher than the actual water temperature, therefore, the detection head of the detector of the infrared temperature sensor is positioned at the inner cylinder 17 outer surface of the indirect heating zone to measure the water temperature in the inner cylinder 17 , is more accurate.

In order to ensure the accuracy of temperature measurement, there are multiple infrared temperature sensors, which are respectively electrically connected to the main controller 4, and the multiple temperature sensors are arranged on the inner wall of the outer cylinder 17 at a certain distance or at a certain angle. The detection head of the temperature sensor faces the cylinder surface of the inner cylinder 17 at different positions, and then obtains multiple temperature values at different positions of the inner cylinder 17, and then calculates the average temperature to reduce measurement errors.

Preferably, the detection heads of the detectors of the plurality of temperature sensors respectively 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. It is avoided that only the inner cylinder 17 located in the direct heating zone or the non-direct heating zone is measured, resulting in a large deviation between the measurement result and the actual water temperature.

In this embodiment, the electromagnetic heating device 33 includes an electromagnetic heating coil 331 and a rectifier 332. The heating program is started, and the current and voltage are converted into direct current through the rectifier (driver) 332, so that the direct current becomes a high-frequency alternating current exceeding audio frequency, and the high-frequency The alternating current is output to the electromagnetic heating coil 331, thereby generating a high-frequency alternating magnetic field, and its electromagnetic induction line acts on the metal outer cylinder 18, and a strong eddy current is generated in the metal inner cylinder 17 due to electromagnetic induction, and the eddy current When the internal resistance of the inner cylinder 17 is overcome and the flow is completed, the conversion of electric energy to heat energy is completed, the inner cylinder 17 is heated, and the purpose of heating the water encapsulated in the inner cylinder 17 is realized.

The electromagnetic heating device 33 is arranged on the outer cylinder 18 , and the electromagnetic heating device 33 may also be arranged on the casing 19 of the washing machine. Preferably, the electromagnetic heating device 33 is arranged on the inner wall of the outer cylinder 18 . The electromagnetic heating device 33 is used to heat the inner cylinder 17, thereby heating the clothes in the inner cylinder 17 and the water in the inner cylinder 17. The structure is simple, the assembly efficiency is high, and the practical promotion of the product is improved.

This embodiment also provides a washing machine control method. The control unit of the washing machine determines the current water temperature in the inner cylinder according to the feedback result of the non-contact temperature detection device, and controls the electromagnetic heating device to be turned on and off. It avoids that the heating temperature is too high, and the electromagnetic heating device cannot be cut off in time, causing certain potential safety hazards.

Specifically, the infrared temperature sensor transmits the detected temperature value t to the control unit of the washing machine, and the control unit calculates and analyzes the current water temperature t', and judges whether it reaches the set temperature t0, and if so, controls the electromagnetic heating The device is powered off; if not, the electromagnetic heating device is controlled to keep the power on. Wherein, the current water temperature t'=xt+c, x is a coefficient, and c is a constant. It avoids insufficient detergent dissolution caused by low water temperature, and inability to dissolve the dirty organic substances on the clothes, resulting in a decrease in the cleaning effect of the washed clothes, or high water temperature that causes deformation, fading, damage of clothes or excessive temperature on the washing machine cause some damage.

Preferably, there are multiple infrared temperature sensors, and multiple infrared temperature sensors transmit the detected temperature values t1, t2, t3, , tn to the control unit of the washing machine, and the control unit calculates and analyzes to obtain The water temperature t1', t2', t3',,, tn' in the inner cylinder is calculated to obtain the current water temperature t'=(t1'+t2'+t3'+,,,tn')/n, and at the same time judge whether it has reached Set the temperature t0, if yes, control the electromagnetic heating device to power off; if not, control the electromagnetic heating device to keep the power on. Wherein, the current water temperature tn′=x·tn+c, x is a coefficient, c is a constant, and n is an integer greater than or equal to 1. By adopting the method of averaging, the current water temperature in the inner cylinder is obtained, and the accuracy is higher.

Embodiment three

The difference between this embodiment and Embodiment 1 and Embodiment 2 is that the temperature detection device used measures 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 volume.

With reference to Fig. 4, this embodiment provides a washing machine, including: an inner cylinder 17, which independently holds washing water when washing clothes; a water inlet system, which communicates with the inner cylinder 17; a heating device 33, which heats The water in the inner cylinder 17; the temperature detection device (not shown in the figure), is arranged in the water inlet system to detect the inlet water temperature. The temperature of the water inlet can be detected in real time by the temperature detection device provided in the water inlet system, so as to ensure that the control system of the washing machine controls the water temperature in the inner tub 17 to achieve a better washing effect.

In the above solution, the washing machine also includes a flow detection device (not shown in the figure) installed in the water inlet system to detect the water intake; preferably, the temperature detection device is a temperature sensor, and the flow detection device is a flow rate sensor. sensor. The metering of the flow sensor in the water intake in the inner cylinder 17 ensures that the control system of the washing machine controls the water yield in the inner cylinder 17 to achieve a better washing effect. The flow sensor monitors the flow of water in the inner cylinder 17 in real time. In this embodiment, the flow sensor is used to solve the water inflow problem of the non-porous inner cylinder drum washing machine according to the set water inflow, ensure the washing effect, and have a simple structure and convenient operation.

The water inlet system includes a water inlet pipeline 36 communicating with the inside of the inner cylinder 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 also includes a water inlet valve 20 arranged on the water inlet pipeline. The flow sensor monitors the flow rate of the inner cylinder 17 in real time when the water enters, and closes the water inlet valve 20 when the set water inlet amount is reached to complete the water inlet. water. The temperature detection device and the flow rate detection device are assembled together with the water inlet valve 20, and the three are assembled first, and then installed, which reduces the installation steps and improves the assembly efficiency.

In this implementation, the washing machine also includes an outer cylinder 18 sleeved on the outside of the inner cylinder 17 coaxially with the inner cylinder 17 and an outer casing 19 arranged outside the outer cylinder 18, and the heating device 33 is arranged on the outer cylinder 18 or the outer casing 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. The electromagnetic heating device 33 is used to heat the inner cylinder 17, thereby heating the clothes in the inner cylinder 17 and the water in the inner cylinder. The structure is simple, the assembly efficiency is high, and the practical promotion of the product is improved.

Referring to FIG. 5 , this embodiment also provides a washing machine control method. When the washing machine executes the water inlet program, the control unit of the washing machine controls the operation of the heating device according to the result detected by the temperature detection device. It avoids that the heating time of the heating device is too long, which causes the heating temperature to be too high, and the heating device is not cut off in time, causing certain safety hazards. By adopting the combination of the temperature detection device and the heating device, the heating time of the water in the non-porous inner cylinder is controlled, which effectively avoids the excessive temperature of the water in the inner cylinder caused by the heating time of the heating device being too short or too long. If it is too low or too high, it will affect the washing effect or cause damage to the washed clothes and the washing machine.

Specifically, according to the initial water temperature value fed back by the temperature detection device, the control unit of the washing machine calculates the heating time T for the water in the inner cylinder from the initial water temperature to the set water temperature, and controls the heating time T. The device stops working after heating time T;

The heating time T of described heating device is:

T=4.2 (t-t0) L/3600;

Among them: T is the heating time, 4.2 is a constant, t is the set water temperature, t0 is the initial water temperature value detected by the temperature detection device, and L is the set water intake.

In order to ensure the accuracy of temperature measurement, the initial water temperature t0 in the inner cylinder can be obtained by means of averaging. Specifically, the initial water temperature t0=(t1+t2+t3+t4+,,, tn)/ n, wherein n≥3; t1~tn are different water temperature values detected by the temperature detection device at different times during the water inlet process of the washing machine.

Preferably, the temperature detection device detects the water temperature value at regular intervals, further improving the accuracy of the measured initial water temperature t0, and avoiding large deviations between the water temperature value measured at the concentrated time and the actual average water temperature value.

When the washing machine executes the water intake program, the control unit of the washing machine judges whether the set water intake has reached the set water intake according to the current water intake fed back by the flow detection device, and if so, stops the water intake and determines whether to start the heating device; if not , then continue to enter the water.

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

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

In this embodiment, the set water intake and the set water temperature are set by the user, or are automatically set by the control unit of the washing machine according to the detected current laundry information, and the laundry information includes laundry weight, laundry Material and degree of soiling of the clothing.

Embodiment four

This embodiment introduces the electromagnetic heating device 33 described in Embodiment 1 to Embodiment 3 in detail.

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 arranged on the outer cylinder 18, and the heating device 5 It 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 .

By arranging the above-mentioned electromagnetic heating device 33 on the outer cylinder 18, the inner cylinder 17 inside the outer cylinder 18 and the washing water inside the inner cylinder 17 are heated by electromagnetic force, so as to achieve the purpose of adjusting the temperature of the washing water in the inner cylinder 17 of the washing machine. .

In this embodiment, at least a part of the inner cylinder 17 is made of metal material, so as to generate heat due to the eddy current effect generated by the magnetic field generated by the electromagnetic heating device 33 . The outer cylinder 18 is made of plastic material that does not excite the eddy current effect in the magnetic field. Preferably, the side walls of the inner cylinder 17 are all made of metal, and the electromagnetic heating device 33 is correspondingly provided on the side walls of the outer cylinder 18 .

In this embodiment, due to gravity, the incoming water flowing into the inner cylinder 17 will converge downwards at the bottom of the inner cylinder 17, so in order to improve the heating efficiency, it is preferable to set the electromagnetic heating device 33 at the lowest point of the outer cylinder 18 to The washing water collected at the bottom of the inner cylinder 17 is directly heated to 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 settings can also be made: a plurality of electromagnetic heating devices 33 are arranged on the outer cylinder 18; preferably, each electromagnetic heating device 33 is arranged on the side of the outer cylinder 18 at intervals of a certain angle on the wall. By arranging 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 shell, the plastic shell is hollow inside to form an installation cavity with one side open, and an electromagnetic generator is installed in the installation cavity. The preferred electromagnetic generator is The electromagnetic heating coil 331, the plastic casing is fixedly installed on the outer side of the outer cylinder, and the opening of the installation cavity of the plastic casing is arranged towards the inside of the outer cylinder, so that the 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 then Ensure that the part of the inner cylinder 17 made of metal is in the magnetic field, so that the metal drum is subjected to the eddy current effect in the magnetic field to generate heat to heat the washing water in the inner cylinder 17 . The rectifier 332 can be arranged outside the outer cylinder 18 or on the inner wall of the outer cylinder 18 . In this embodiment, the electromagnetic generator is provided with a connecting terminal passing through the plastic casing, and the connecting terminal passes through the bottom of the plastic casing and is connected with the power supply line of the washing machine to supply power to the electromagnetic generator.

The heating program is started, and the current and voltage are converted into direct current through the rectifier (driver) 332, so that the direct current becomes a high-frequency alternating current exceeding the audio frequency, and the high-frequency alternating current is output to the electromagnetic heating coil 331, thereby generating a high-frequency alternating magnetic field, Its electromagnetic induction line acts on the outer cylinder 18 made of metal, and a strong eddy current is generated in the metal inner cylinder 17 due to electromagnetic induction. When the eddy current overcomes the internal resistance of the inner cylinder 17 and flows, it completes the conversion of electric energy to heat energy, realizing the inner cylinder 17 generates heat, and then realizes the purpose of heating the water encapsulated in the inner cylinder 17

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 several magnetic strips, can also be provided on the plastic shell to isolate the magnetic field from being transmitted to the outside of the outer cylinder.

Embodiment five

This 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 intake of the non-porous inner drum washing machine. The specific scheme is as follows:

Referring to Fig. 4 and Fig. 7, a drum washing machine includes an inner cylinder 17 and a water inlet pipe 36 connected to the inner cylinder 17. The inner cylinder 17 is a non-porous inner cylinder, which contains washing water when washing clothes, so The flow sensor 1 for detecting the flow of water inflow is arranged on the water inlet pipeline 36 described above.

In this embodiment, a flow sensor 1 is installed on the water inlet pipeline 36 to monitor the flow rate of water intake. When the set water intake volume is reached, the water intake valve 20 is closed to complete the water intake. In this embodiment, the flow sensor is used to solve the water inflow problem of the non-porous inner drum washing machine according to the set water level, ensuring the washing effect, simple structure and convenient operation.

Further, the drum washing machine of this 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, and the outlet end of the water inlet valve 20 passes through the first water inlet pipe. The water pipe communicates with the detergent box 3, and the outlet end of the detergent box 3 communicates with the inner cylinder 17 through the second water inlet pipe, and the flow sensor 1 is arranged on the first water inlet pipe or the second water inlet pipe.

Preferably, the flow sensor 1 is arranged on the first water inlet pipe, so that the detergent in the detergent box can enter the flow sensor 1 .

The drum washing machine in this embodiment includes a main controller 4, and the flow sensor 1 is electrically connected to the main controller 4 through a line. The main controller 4 can collect the water intake of the inner cylinder 17 in real time, and close the water intake valve 20 when the set water intake is reached.

As an implementation 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.

The flow sensor 1 can be installed at any position on the water inlet pipeline described in this embodiment, preferably at the rear of the water inlet valve 20, to accurately measure the water flow entering the sealed inner cylinder 17, and the flow sensor 1 is connected to the main controller 4 , the main controller 4 can collect the water intake of the inner cylinder 17 in real time, and close the water intake valve 20 when the set water intake is reached.

In order to realize water inflow into the non-porous inner cylinder of this embodiment, the drum washing machine of this embodiment includes a drive motor 16 and an inner cylinder shaft 13, and the drive motor 16 drives the inner cylinder through the transmission connection between the inner cylinder shaft 13 and the inner cylinder 17. The cylinder 17 rotates, the inner cylinder shaft 13 has a hollow passage 14 communicating with the interior of the inner cylinder 17 , and the water inlet pipeline communicates with the hollow passage of the inner cylinder shaft 13 .

Specifically, the inner cylinder shaft 13 is connected to the drive motor 16, and the drive motor 16 includes a stator and a rotor, and the rotor is fixedly connected to the inner cylinder shaft 13; a through hole is provided at the center of the rotor, and the water inlet pipeline passes through The through hole of the rotor communicates with the hollow passage 14 of the inner cylinder shaft 13 .

Further, a first dynamic sealing structure 15 is provided between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is provided 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 non-porous inner cylinder, the drum washing machine of this embodiment includes an outer cylinder 18, an inner cylinder drainage hole is provided on the side wall of the inner cylinder 17, and a normally closed check valve plug 11 is installed on the inner cylinder drainage hole. The ejector mechanism 10 for pushing the one-way valve plug 11 back to discharge water is installed on the outer cylinder 18 .

As an implementation of this embodiment, the outer cylinder 18 is also provided with a locking mechanism for locking the rotation of the inner cylinder 17. After the locking mechanism locks the inner cylinder, the ejector rod mechanism 10 pushes the one-way valve plug 11 top open to drain water.

As another implementation of this embodiment, a plurality of dehydration holes are provided on the side wall of the inner cylinder 17 in this embodiment, and centrifugal valves are installed on the dehydration holes. By controlling the inner cylinder to reach a certain speed, the centrifugal The valve is opened under the action of dehydration centrifugal force to perform washing drainage or dehydration drainage.

This embodiment also provides a control method for the drum washing machine. The washing machine executes the washing/rinsing program. During the water intake process, the flow sensor detects the water intake flow value in real time, and the washing machine calculates the water intake volume according to the water intake flow value and the water intake time. , when the water intake reaches the set water intake of the washing machine, the water intake will stop.

The drum washing machine is provided with multiple water inlet flow values that can be selected by the user, and the washing machine enters water according to the water inlet flow value selected by the user.

The drum washing machine has a function of weighing clothes, which can determine the flow value of water inflow according to the weight of clothes for water inflow.

Embodiment six

Referring to FIG. 8 to FIG. 14 , a laundry lifting device for a washing machine and a drum washing machine according to this embodiment.

A laundry lifting device for a washing machine in this embodiment includes:

The body has an accommodation chamber inside;

The water inlet is arranged on the body and communicates with the containing chamber;

and a centrifugal drainage assembly arranged in the containing chamber;

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

The clothing lifting device of this embodiment can be installed on the inner wall of the inner cylinder of the drum washing machine. During the washing process, the clothes are lifted to a certain height and dropped down along with the rotation of the inner cylinder. In this embodiment, a centrifugal drainage assembly is integrated in the clothes lifting device. The initial state of the centrifugal drainage assembly is closed to keep the inner cylinder closed and independently hold the washing water. Under the action of centrifugal force, the centrifugal drainage assembly can be opened for drainage, realizing a non-porous inner cylinder. The drain of the drum washing machine.

Therefore, in this embodiment, a centrifugal drainage assembly is installed in the lifting device, which not only realizes the lifting and drainage of the clothes of the non-porous inner drum washing machine, but also forms a modular supply, which is convenient for production and assembly, and improves assembly efficiency.

With reference to Figures 9-14, the body described in this embodiment includes:

The lifting housing 3201 has a raised portion on the surface and an open cavity inside;

The lifting base 3208 is detachably mounted on the open end of the open cavity of the lifting housing 3201 to form a receiving chamber;

The centrifugal drainage assembly is installed on the lifting base 3208 , and the water inlet 3209 is set on the lifting housing 3201 and/or the lifting base 3208 .

The lifting device of this embodiment includes a lifting shell 3201, which has a raised portion on the surface for lifting clothes; a lifting base 3208, which is detachably mounted on the open end of the open cavity of the lifting shell 3201 to form an accommodating chamber, Used to install centrifugal drain assembly.

Furthermore, in order to realize the centrifugal drainage and installation of the centrifugal drainage assembly, the centrifugal drainage assembly described in this embodiment includes:

Centrifugal parts, which generate centrifugal motion under the action of centrifugal force;

Sealing plunger 3213, used to block the drain;

The centrifugal movement of the centrifugal member drives the sealing plunger 3213 to move to open the drain port;

The lifting base 3208 is provided with a plunger through hole for sealing the plunger 3213 passing out of the containing chamber.

The centrifugal member described in this embodiment includes a connecting part 3218 and a counterweight part 3217. One end of the connecting part 3218 is connected to the counterweight part 3217, and the other end is rotatably connected to the sealing plunger 3213. The middle part of the connecting part 3218 is rotatably mounted on Lift the base 3208 to form a lever structure.

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

Further, a guide piece 3214 is installed on the lifting base 3208 described in this embodiment at the place where the plunger goes through the hole. The guide piece 3214 has a guide passage opposite to the plunger through hole, and the sealing plunger 3213 is set in the guide passage The reciprocating movement along the inner cylinder ensures the stable reciprocating movement of the sealing plunger 3213, so that the sealing plunger 3213 can be reset more accurately to ensure the sealing effect of the drain port of the inner cylinder.

In this embodiment, the sealing plunger 3213 is provided with a sealing plug 3204, and the sealing plunger 3213 is provided with an elastic member 3203 for providing elastic force for resetting the sealing plunger 3213, and the elastic member 3203 is a spring.

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

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

Further, the base fixing column 3205 and the connecting rib 3219 described in this embodiment are clamped and positioned through a snap-fit structure, and the base fixing column 3205 and the connecting rib 3219 are positioned and fixedly connected through a connecting piece 3207 .

Preferably, the connecting rib 3219 is provided with a locking protrusion 3221, the base fixing column 3205 has a channel for the connecting rib to extend into, and the peripheral wall of the channel is provided with a locking groove that cooperates with the locking protrusion 3221 3222.

The connecting rib 3219 described in this embodiment is provided with a connecting hole, the base fixing column 3205 is provided with a positioning hole opposite to the connecting hole, and the connecting piece 3207 is fixedly connected to the connecting hole through the positioning hole. Preferably, The connecting piece 3207 is a connecting screw.

In order to realize the installation of the lifting device in the inner cylinder, the open ends of the lifting housing 3201 in this embodiment are respectively provided with housing fixing columns 3202 for fixing and assembling the lifting device, and the lifting base 3208 corresponds to the housing fixing columns The position of 3202 is avoided, and the shell fixing column 3202 of this embodiment makes the structure of the lifting device installed in the inner cylinder unchanged, reduces the learning cost of assembly, and improves assembly efficiency.

Preferably, the lifting base 3208 is a plate-shaped structure that covers the open chamber of the lifting shell 3201, and the two ends of the plate-shaped structure are respectively spaced from the opening edge of the lifting shell. The housing fixing columns 3202 are correspondingly arranged in the interval between the two ends.

The lifting housing 3201 in this embodiment includes an annular base portion 3211 and a raised portion 3212 integrally formed with the annular base portion 3211 and protruding toward one side.

The water inlet 3209 is disposed on the annular base 3211, and the raised portion 3212 is provided with a plurality of spray holes 3210 communicating with the open cavity.

As shown in Figure 8, this embodiment also provides a drum washing machine with the clothes lifting device for the washing machine, comprising: an inner cylinder 17; an inner cylinder door 6, which can be opened/closed and installed on the mouth of the inner cylinder 17; When the inner cylinder door 6 is closed, it forms an independent washing chamber together with the inner cylinder 17, and independently holds washing water when washing clothes; a drain port is set on the side wall of the inner cylinder 17, and the lifting device 32 is installed on On the drain port on the inner wall of the inner cylinder 17, the centrifugal drainage assembly blocks and closes the drain port.

The drum washing machine of this embodiment installs the inner cylinder door 6 on the mouth of the inner cylinder 17, and the inner cylinder 17 adopts a non-porous cylinder design, and the two together form an independent washing chamber. Filling the washing/rinsing water between the inner cylinder and the outer cylinder greatly reduces the washing water consumption of the washing machine; avoids the possibility of dirt adhesion between the inner cylinder and the outer cylinder; greatly improves user health and user experience, and greatly Greatly saves water resources.

Further, the side wall of the inner cylinder 17 is provided with a fixing hole for fixing and assembling the lifting device 32, and the lifting device 32 is sealed and fixed on the fixing hole through a connecting piece, and the sealing connection keeps the inner cylinder 17. The sealing realizes the invention purpose of holding washing water independently.

In the control method of the drum washing machine in this embodiment, the washing machine includes an inner cylinder, and washing water is contained in the inner cylinder when washing clothes, and a drainage hole is provided on the side wall of the inner cylinder, and a lifting device for controlling its conduction/closing is installed on the drainage hole, and the control The method includes: during the washing process of the washing machine, by controlling the rotation speed of the inner cylinder to reach or exceed the set rotation speed N0, the centrifugal drainage component of the lifting device is subjected to centrifugal force to open the drain hole to drain the inner cylinder.

The drainage device of this embodiment adopts a centrifugal drainage assembly, and the control method controls the rotation of the inner cylinder to generate centrifugal force to open the centrifugal drainage assembly to achieve drainage, and realizes the drainage and dehydration of the drum washing machine without a porous inner cylinder by means of the centrifugal drainage assembly + program control .

As an implementation of this embodiment, after the washing machine executes the washing program or the rinsing program, the rotation speed of the inner tub is controlled to reach the first rotation speed N1 and maintained for a set time t1, where N1≥N0, and N0 is greater than the washing program or the rinsing program. The rotation speed of the inner cylinder in the program; when the inner cylinder maintains the rotation speed N1 and the rotation time reaches t1, control the inner cylinder to stop rotating and enter the next program;

Preferably, N1 is 110-400 rpm, more preferably 170 ± 50 rpm, more preferably 150 ± 20 rpm;

Preferably, t1 is in the range of 0.1-5 minutes, more preferably 1-2 minutes.

Further, the washing machine includes a weighing device for weighing the weight in the inner drum. The weighing device detects the weight W0 in the inner drum before the inner drum starts to rotate at N1. When the rotation time reaches t1, the weighing device detects the weight in the inner drum. The weight W1, the control system judges whether the drainage is normal according to the comparison between W1 and W0.

Further, the control system judges whether the drainage is abnormal by comparing the value k of W1/W0. If k≥0.7, the control system judges that the drainage is abnormal and sends an alarm; otherwise, the drainage is normal.

As another implementation of this embodiment, after the washing machine executes the washing program or the rinsing program, the rotation speed of the inner tub is controlled to reach the first rotation speed N1, where N1≥N0, and N0 is greater than the rotation speed of the inner tub in the washing program or the rinsing program. ; After the water in the inner cylinder is drained, control the inner cylinder to stop rotating and enter the next procedure.

Further, the washing machine includes a weighing device for weighing the weight in the inner cylinder. During the process of the washing machine controlling the inner cylinder to keep rotating at N1, the control system judges whether the drainage is completed according to the weight value in the inner cylinder detected by the weighing device in real time. .

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

The weight values W0, W1, W2, ..., Wt in the inner cylinder detected by the weighing device in real time;

Make the difference between the weighing values at adjacent times, record n1=W1-W0, n2=W2-W1, ..., nt=(Wt)-(Wt-1);

When nt remains constant and tends to 0 within a certain period of time, the drainage is completed.

Further, the control system judges whether the drainage is normal by comparing the changes of n1, n2, . . .

Further, the washing machine executes a dehydration program, and the lowest dehydration speed N2 in the dehydration program is greater than or equal to N0.

Embodiment seven

This embodiment mainly solves the problem of how to ensure the unbalanced air pressure in the airtight compartment of the non-porous inner drum washing machine. Specifically, the sudden solenoid valve cut off water, especially the tap water pipe network, forms a negative pressure and returns the washing water in the airtight cabin. Wash to the pipe network; or there is gas inside and it is difficult to enter the water.

Referring to Fig. 15 to Fig. 17, a drum washing machine of the present embodiment includes an inner cylinder 17, which is a non-porous inner cylinder, which contains washing water when washing clothes, and also includes an inner cylinder 17 for connecting the inner cylinder 17 with the external environment and An air pressure balance mechanism that balances the air pressure inside the inner cylinder.

When water enters, the gas in the airtight compartment of the inner cylinder can overflow through the equalizing mechanism under pressure to ensure air pressure balance.

When the water is suddenly cut off, the external atmosphere can quickly enter the sealed compartment of the inner cylinder, and destroy the suction, ensure the air pressure balance, and prevent the washing water from being sucked into the tap water pipe network.

For other things such as dehydration, the air pressure balance mechanism can also ensure the air pressure balance of the inner cylinder.

As an implementation of this embodiment, the air pressure balance mechanism includes a pressure equalization hole 27 arranged on the inner cylinder 17, and one end of the pressure equalization hole 27 communicating with the inside of the inner cylinder 17 is arranged on the inner cylinder 17 close to the rotation Central axis position and always higher than the highest water level position in the inner cylinder 17.

The drum washing machine of this embodiment includes a drive motor 16 and an inner cylinder shaft 13, the drive motor 16 drives the inner cylinder 17 to rotate through the transmission connection between the inner cylinder shaft 13 and the inner cylinder 17, and the pressure equalizing channel 27 is opened in the inner cylinder The shaft 13 communicates with the inside of the inner cylinder 17 and the external environment, and the highest water level in the inner cylinder 17 is lower than the inner cylinder shaft 13 . This can prevent the water in the inner cylinder from flowing out from the pressure equalizing hole.

The drum washing machine of this embodiment includes an outer cylinder 18, the inner cylinder 17 is arranged inside the outer cylinder 18, the water discharged from the inner cylinder 17 is discharged through the outer cylinder 18, and the mouth of the inner cylinder 17 is installed to close the inner cylinder of the inner cylinder. The cylinder door 6, the cylinder mouth of the outer cylinder 18 is open, one end of the pressure equalizing hole 27 communicates with the interior of the inner cylinder 17, and the other end is arranged in the interior of the outer cylinder 18 and communicates with it. Like this, prevent extreme situation, this hole effluent also can be collected in the outer cylinder 18.

Further, the side wall of the inner cylinder 17 described in this embodiment is provided with an inner cylinder drain hole, and a normally closed check valve plug 11 is installed on the inner cylinder drain hole, and the outer cylinder 18 is installed on the outer cylinder 18 for turning the check valve The plug 11 pushes away the ejector rod mechanism 10 for draining.

Preferably, the outer cylinder 18 is further provided with a locking mechanism for locking the rotation of the inner cylinder. After the locking mechanism locks the inner cylinder, the ejector mechanism pushes the one-way valve plug to drain water.

Further, the drum washing machine of this embodiment includes a water inlet pipeline, the inner cylinder shaft 13 has a hollow passage 14 communicating with the inside of the inner cylinder 17, and the water inlet pipeline communicates with the hollow passage 14 of the inner cylinder shaft 13 ; The pressure equalizing hole 27 and the hollow channel 14 are respectively communicated with the interior of the inner cylinder 17 and are isolated from each other. Like this, can guarantee that the gas in the airtight chamber of inner cylinder can discharge smoothly and keep the air pressure balance inside inner cylinder, prevent water inflow from being discharged directly by pressure equalizing hole 27 simultaneously and leak.

Specifically, the hollow channel 27 extends from one end to the other end along the central axis of the inner cylinder shaft, and the pressure equalizing channel includes a first channel segment and a second channel segment, and the first channel segment is arranged parallel to the hollow channel , one end of which communicates with the interior of the inner cylinder, one end of the second channel section communicates with the first channel section, and the other end extends to the outer peripheral wall of the inner cylinder shaft to communicate with the interior of the outer cylinder.

Preferably, the second channel section is arranged perpendicularly to the first channel section to form an L-shaped pressure equalizing channel.

Further, the inner cylinder shaft 13 is connected to the drive motor 16, the drive motor 16 includes a stator and a rotor, and the rotor is fixedly connected to the inner cylinder shaft; a through hole is provided at the center of the rotor, and the water inlet pipeline passes through the rotor The through hole communicates with the hollow channel of the inner cylinder shaft.

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

In the drum washing machine described in this embodiment, a plurality of dehydration holes are provided on the side wall of the inner cylinder 17, and centrifugal valves are installed on the dehydration holes, and the centrifugal valves are opened under the action of dehydration centrifugal force for dehydration and drainage.

Embodiment eight

This embodiment mainly solves the problem of how to ensure the unbalanced air pressure in the airtight compartment of the non-porous inner drum washing machine. Specifically, the sudden solenoid valve cut off water, especially the tap water pipe network, forms a negative pressure and returns the washing water in the airtight cabin. Wash to the pipe network; or there is gas inside and it is difficult to enter the water.

Referring to Fig. 18 to Fig. 22, a drum washing machine of this embodiment includes an inner cylinder 17, which is a non-porous inner cylinder, which contains washing water when washing clothes, and also includes a cylinder for communicating with the external environment to balance the inner cylinder 17. A pressurization mechanism and/or a pressure relief mechanism for the air pressure inside the inner cylinder 17 .

The pressurization mechanism described in this embodiment includes a pressurization channel 28 and a negative pressure safety valve 29. The negative pressure safety valve 29 is arranged on the pressurization channel 28, and is used for single-use when the internal pressure of the inner cylinder 17 is lower than the atmospheric pressure of the external environment. The guide guides the pressurized hole 28, and the external environment gas enters the interior of the inner cylinder 17 through the pressurized hole 28 to be pressurized until the internal air pressure of the inner cylinder 17 is balanced with the external environment air pressure, 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 set on the inner cylinder 17 near the central axis of rotation and is always higher than the highest point in the inner cylinder 17. Water level position, the positive pressure safety valve 31 is arranged on the pressure relief hole 30, and is used for the one-way conduction pressure relief hole 30 to perform 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 in line with the external environment. The ambient air pressure is balanced, and the positive pressure safety valve 31 is closed.

19, when water enters, the gas in the sealed compartment of the inner cylinder 17 is pressurized, once it is greater than the set value of the positive pressure safety valve, the positive pressure safety valve opens, and can overflow through the pressure relief hole to ensure air pressure balance.

As shown in Figure 19, when the water is suddenly cut off, the gas in the airtight compartment of the inner cylinder 17 is under pressure, and once it is less than the set value of the positive pressure safety valve, the external atmosphere can quickly enter the airtight compartment and destroy the suck back, ensuring air pressure balance. Avoid washing water being sucked into the water pipe network. For other things such as dehydration, the air pressure balance mechanism can also ensure the air pressure balance of the inner cylinder.

The drum washing machine of this embodiment includes a drive motor 16 and an inner tube shaft 13. The drive motor 16 drives the inner tube 17 to rotate through the transmission connection between the inner tube shaft 13 and the inner tube 17. The pressure hole 30 is provided on the inner cylinder shaft 13 to connect the interior of the inner cylinder 17 with the external environment, and the highest water level in the inner cylinder 17 is lower than the inner cylinder shaft 13 .

The drum washing machine of this embodiment includes an outer cylinder 18, the inner cylinder 17 is arranged inside the outer cylinder 18, the water discharged in the inner cylinder 17 is discharged through the outer cylinder 18, and the mouth of the inner cylinder 17 is installed to close the inner cylinder of the inner cylinder. The door 6, the mouth of the outer cylinder 18 is open, one end of the pressurization hole 28 and/or the pressure relief hole 30 communicates with the interior of the inner cylinder 17, and the other end is arranged inside the outer cylinder 18 and communicates with it.

The drum washing machine of this embodiment includes a water inlet pipeline, the inner cylinder shaft 13 has a hollow channel 14 communicating with the inside of the inner cylinder 17, and the water inlet pipeline communicates with the hollow channel 14 of the inner cylinder shaft 13; The above-mentioned pressure relief hole 30 and the hollow channel 14 communicate with the interior of the inner cylinder 17 and are isolated from each other.

Referring to Figure 21 and Figure 22, the hollow channel 14 extends from one end to the other end along the central axis of the inner cylinder shaft 13, and the pressure relief channel 30 includes a first channel section and a second channel section, the first channel section It is arranged parallel to the hollow channel, one end of which communicates with the interior of the inner cylinder, one end of the second channel section communicates with the first channel section, and the other end extends to the outer peripheral wall of the inner cylinder shaft to communicate with the interior of the outer cylinder;

Preferably, the second tunnel section is arranged perpendicularly to the first tunnel section to form an L-shaped pressure relief tunnel.

The drum washing machine of this embodiment includes a water inlet pipeline, the inner cylinder shaft 13 has a hollow channel 14 communicating with the inside of the inner cylinder 17, and the water inlet pipeline communicates with the hollow channel 14 of the inner cylinder shaft 13; The above-mentioned pressurization hole 28 communicates with the hollow channel 14 .

Further, the hollow passage 14 extends from one end to the other end along the central axis of the inner cylinder shaft 13 , one end of the pressurized hole 28 communicates with the hollow passage 14 , and the other end extends to the outer circumference of the inner cylinder shaft 13 The wall communicates with the inside of the outer cylinder 18 . Preferably, the pressurization hole 28 and the hollow channel 14 are arranged perpendicular to each other.

The inner cylinder shaft described in this embodiment is connected to the driving motor, the driving motor includes a stator and a rotor, and the rotor is fixedly connected to the inner cylinder shaft; a through hole is set at the center of the rotor, and the water inlet pipeline passes through the through hole of the rotor It communicates with the hollow channel of the inner cylinder shaft.

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

Referring to Figure 21 and Figure 22, both the pressurization channel 28 and the pressure relief channel 30 are arranged on the inner cylinder shaft 13, and the openings communicating with the atmosphere are all inside the outer cylinder 18; The inner side of the water inlet channel 14. It is conceivable that the preferred pressurization channels 28 and pressure relief channels 30 are all arranged on the inner cylinder shaft 13, and the openings communicating with the atmosphere are all inside the outer cylinder 18;

The above-mentioned embodiments can be implemented independently or in combination with each other.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology of this patent Without departing from the scope of the technical solution of the present invention, personnel can use the technical content of the above prompts to make some changes or modify them into equivalent embodiments with equivalent changes. In essence, any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (15)

1. A washing machine, characterized by comprising:

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

the electromagnetic heating device is used for heating the water in the inner cylinder;

a temperature detection device for detecting the water temperature in the inner cylinder; or detecting the temperature of the inner cylinder; or detecting the temperature at a certain distance position outside the inner cylinder;

hoisting device installs on the inner tube inner wall, includes:

a body having a receiving chamber therein;

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

the centrifugal drainage component is arranged in the accommodating chamber, the initial state is a closed state, and the centrifugal drainage component can be opened to drain water under the action of centrifugal force;

the body includes:

the lifting shell is provided with a convex part on the surface and an open cavity inside;

the lifting base body is detachably arranged at the open end of the open cavity of the lifting shell to form an accommodating chamber;

the lifting base body is provided with a base body fixing column, a connecting rib extending towards the opening end is arranged in the open cavity of the lifting shell, and the base body fixing column is fixedly connected with the connecting rib; the centrifugal drainage assembly is arranged in the middle of the lifting base body, and the base body fixing columns comprise at least two and are symmetrically arranged on two sides of the centrifugal drainage assembly;

the two open ends of the lifting shell are respectively provided with a shell fixing column for fixedly assembling the lifting device, and the lifting base body is arranged in a way of avoiding at the position corresponding to the shell fixing column; promote the base member for the platelike structure of closing cap on the uncovered cavity of promotion casing, platelike structure's both ends have certain interval with the uncovered edge that promotes the casing respectively, the casing fixed column correspond and set up in the interval at both ends.

2. The washing machine as claimed in claim 1, further comprising an outer cylinder sleeved outside the inner cylinder and coaxially arranged with the inner cylinder, wherein the temperature detection device is arranged on the electromagnetic heating device;

or, set up on the outer cylinder;

or, it may be disposed at any position between the inner cylinder and the outer cylinder.

3. The washing machine as claimed in claim 2, wherein the temperature sensing device and the electromagnetic heating device are electrically connected to a main controller of the washing machine, respectively.

4. A washing machine as claimed in claim 3 wherein the temperature sensing means is a temperature sensor and the electromagnetic heating means is an electromagnetic heating coil.

5. A washing machine as claimed in claim 4 wherein the temperature sensor is a resistance temperature detector; alternatively, a semiconductor sensor; or, an NTC temperature sensor.

6. A washing machine as claimed in claim 2 wherein the electromagnetic heating means is provided on the outer tub.

7. A washing machine as claimed in claim 6 wherein the electromagnetic heating means is provided on the inner wall of the outer drum.

8. The washing machine as claimed in claim 2, wherein the heating area of the inner tub corresponding to the electromagnetic heating device is divided into a direct heating area and an indirect heating area, and the temperature detecting device is provided on the inner wall of the outer tub corresponding to the direct heating area or the indirect heating area.

9. The washing machine as claimed in claim 8, wherein the temperature sensing means is provided on an inner wall of the outer tub in correspondence with the indirect heating zone.

10. A washing machine as claimed in claim 9, characterized in that the temperature detection means and the electromagnetic heating means are both arranged on the inner wall of the outer drum, the temperature detection means are arranged at the position which is the farthest from the axial direction of the electromagnetic heating means, and the projections of the temperature detection means and the electromagnetic heating means on the cross section of the outer drum fall on two end points of the same diameter.

11. The washing machine as claimed in claim 8, wherein the temperature detecting means is a plurality of temperature sensors electrically connected to a main controller of the washing machine, respectively, and the plurality of temperature sensors are spaced apart from each other and disposed on an inner wall of the tub.

12. The washing machine as claimed in claim 11, wherein the temperature sensors are uniformly distributed on the inner wall of the outer tub corresponding to the direct heating zone and the inner wall of the outer tub corresponding to the indirect heating zone.

13. A control method of a washing machine according to any one of claims 1 to 12, wherein a control unit of the washing machine determines the current water temperature in the inner tub based on the feedback result of the temperature detection device, and controls the on/off of the electromagnetic heating device.

14. The control method of the washing machine as claimed in claim 13, wherein the temperature detecting means is a temperature sensor, the temperature sensor transmits a detected temperature value t to a control unit of the washing machine, the control unit calculates and analyzes a current water temperature t' and judges whether a set temperature t0 is reached, if yes, the electromagnetic heating means is controlled to be powered off; if not, controlling the electromagnetic heating device to keep electrifying;

wherein, the current water temperature t' = xt + c, x is a coefficient, and c is a constant.

15. The control method of the washing machine according to claim 13, wherein the temperature detecting device is a plurality of temperature sensors, the plurality of temperature sensors respectively transmit detected temperature values t1, t2, t3, t, tn to the control unit, the control unit calculates and analyzes the water temperatures t1', t2', t3', tn ' in the inner cylinder, calculates and analyzes the current water temperatures t ' = (t 1' + t2' + t3', tn ')/n), and simultaneously judges whether the set temperature t0 is reached, if yes, the electromagnetic heating device is controlled to be powered off; if not, controlling the electromagnetic heating device to keep electrifying;

wherein, the current water temperature tn' = x · tn + c, x is a coefficient, c is a constant, and n is more than or equal to 1.

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