A drum washing machine

Abstract

The present application provides a drum washing machine, which comprises an inner drum, the inner drum is a non-porous inner drum, and the inner drum holds washing water when washing clothes; and the drum washing machine further comprises a gas pressure balancing mechanism for connecting the inner drum with the external environment to balance the gas pressure inside the inner drum. The present application provides a drum washing machine with a non-porous inner drum and a front opening structure, which is simple in structure and can greatly reduce the washing water consumption of the washing machine without filling washing / rinsing water between the inner drum and the outer drum; when the drum washing machine is filled with water, the gas in the sealed cabin of the inner drum can overflow through the balancing mechanism to ensure the gas pressure balance; when the water supply is suddenly cut off, the external atmosphere can quickly enter the sealed cabin of the inner drum and break the siphon to ensure the gas pressure balance and avoid the washing water being sucked into the water supply network.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laundry equipment, in particular, to a drum washing machine. BACKGROUND

[0002] The washing machine is the most widely used household appliance in people's daily life, which helps people get rid of the trouble of washing clothes and brings great convenience to people. However, the washing machine also has some disadvantages, such as long time consumption, large water consumption, etc. With the development of society, water resources as an important natural resource become more and more important, and people's water-saving consciousness also improves, and how to realize the water-saving function of the washing machine becomes particularly important.

[0003] In order to solve the problem of water saving of the washing machine, some patents have been proposed, such as the Chinese invention patent with the patent number 201410215346.3 and the name of a drum washing machine. The invention relates to a drum washing machine, which comprises a box body, an inner drum and an outer drum arranged in the box body, a door seal arranged between the outer drum and the box body, and a drive device connected with the inner drum. The inner drum is a non-porous inner drum, and the inner drum is a conical drum with a small diameter at the bottom and a large diameter at the top. The inner drum is inwardly curved at the top. The door seal is provided with a water inlet pipe, one end of which is connected with a washing water rapid heating device, and the other end of which extends into the inner drum through the door seal. The outer drum is provided with a drain port and a water pressure detection device. According to the above technical solution, the inner drum of the invention is a non-porous inner drum, the water inlet pipe arranged on the door seal is used to realize the water inlet of the inner drum, and the water is discharged during the dehydration process by the shape of the inner drum itself, which can avoid water storage between the inner drum and the outer drum, and greatly save the washing water.

[0004] The above-mentioned invention provides a drum washing machine with a non-porous inner drum, but only the inner drum of the existing drum washing machine is designed as a non-porous structure, which has little practical significance. Because clothes washing must be soaked in a certain amount of water, if the soaking effect is to be achieved, a certain amount of water needs to be stored in the non-porous inner drum, which will increase the burden of the motor and cause power consumption problems. In addition, the water inlet mode of the drum washing machine disclosed in the patent is through the door seal. Since the main function of the door seal is to seal the opening of the outer drum of the washing machine, the water inlet pipe arranged on the door seal will affect the sealing effect of the door seal, which is not easy to achieve, and the patent cannot detect the water level in the inner drum.

[0005] In addition, the present application mainly solves the problem of how to ensure the balance of the air pressure in the sealed cabin of the non-porous inner drum drum washing machine, specifically, the sudden water cut-off of the electromagnetic valve, especially the water cut-off of the water pipe network, forms a negative pressure, which washes the washing water in the sealed cabin back to the pipe network; or the problem of difficult water inlet due to the presence of gas inside.

[0006] Therefore, the present application is proposed. SUMMARY

[0007] To solve the above problems, the present application aims to provide a drum washing machine, in particular, the following technical solutions are adopted:

[0008] A drum washing machine, comprising an inner drum, the inner drum is a non-porous inner drum, and the inner drum holds washing water during washing of laundry; and a gas pressure balancing mechanism for connecting the inner drum with the external environment to balance the internal gas pressure of the inner drum.

[0009] Further, the gas pressure balancing mechanism comprises a pressure equalizing channel provided on the inner drum, and the pressure equalizing channel is provided on the inner drum at a position close to the rotation center axis and is always higher than the highest water level position in the inner drum.

[0010] Further, the drum washing machine comprises a driving motor and an inner drum shaft, the driving motor is in driving connection with the inner drum through the inner drum shaft to drive the inner drum to rotate, the pressure equalizing channel is provided on the inner drum shaft to connect the inner drum with the external environment, and the highest water level in the inner drum is lower than the inner drum shaft.

[0011] Further, the drum washing machine comprises an outer drum, the inner drum is arranged in the outer drum, the water discharged from the inner drum is discharged through the outer drum, the drum opening of the inner drum is provided with an inner drum door for closing the inner drum, the drum opening of the outer drum is open, and one end of the pressure equalizing channel is connected with the inner drum, and the other end is arranged in the outer drum and communicates with the outer drum.

[0012] Further, the side wall of the inner drum is provided with an inner drum drain hole, a normally closed check valve plug is arranged on the inner drum drain hole, and a jack mechanism for jacking open the check valve plug to discharge water is arranged on the outer drum.

[0013] Preferably, the outer drum is further provided with a locking mechanism for locking the rotation of the inner drum, and the jack mechanism jacks open the check valve plug to discharge water after the locking mechanism locks the inner drum.

[0014] Further, the drum washing machine comprises a water inlet pipeline, the inner drum shaft has a hollow channel connected with the inner drum, the water inlet pipeline is connected with the hollow channel of the inner drum shaft, and the pressure equalizing channel and the hollow channel are respectively connected with the inner drum and are arranged to be isolated from each other.

[0015] Further, the hollow channel extends along the center axis of the inner drum shaft from one end to the other end, the pressure equalizing channel comprises a first channel section and a second channel section, the first channel section is arranged in parallel with the hollow channel, and one end of the first channel section is connected with the inner drum, one end of the second channel section is connected with the first channel section, and the other end of the second channel section extends to the outer peripheral wall of the inner drum shaft and communicates with the inner drum.

[0016] Preferably, the second hole section is arranged perpendicularly to the first hole section to form an L-shaped pressure equalizing hole.

[0017] Further, the inner cylinder shaft is connected with a driving motor, the driving motor comprises a stator and a rotor, the rotor is fixedly connected with the inner cylinder shaft, a through hole is arranged at the center of the rotor, and the water inlet pipeline is communicated with the hollow channel of the inner cylinder shaft through the through hole of the rotor.

[0018] Further, a first dynamic sealing structure is arranged between the water inlet pipeline and the through hole of the rotor, and a second dynamic sealing structure is arranged between the through hole of the rotor and the hollow channel of the inner cylinder shaft.

[0019] Further, a plurality of dewatering holes are arranged on the side wall of the inner cylinder, and a centrifugal valve is arranged on each dewatering hole, and the centrifugal valve is opened to dewater and drain water under the action of dewatering centrifugal force.

[0020] The drum washing machine with the non-hole inner cylinder front opening structure is simple in structure, can greatly reduce the washing water consumption of the washing machine without filling washing / rinsing water between the inner cylinder and the outer cylinder, avoids the possibility of dirt adhesion between the inner cylinder and the outer cylinder, greatly improves user health and user experience, and greatly saves water resources.

[0021] When water is filled into the drum washing machine, the gas in the sealed cabin of the inner cylinder can overflow through the pressure equalizing mechanism to ensure pressure balance. When water is suddenly cut off, the external atmosphere can quickly enter the sealed cabin of the inner cylinder and destroy the back suction to ensure pressure balance and avoid that washing water is sucked into the water supply pipe network. The pressure equalizing mechanism can also ensure pressure balance of the inner cylinder during dewatering. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A principle schematic view of the drum washing machine of the embodiment one of the present application;

[0023] Figure 2 A principle schematic view of the drum washing machine of the embodiment two of the present application (embodiment one);

[0024] Figure 3 A principle schematic view of the drum washing machine of the embodiment two of the present application (embodiment two);

[0025] Figure 4 A principle schematic view of the drum washing machine of the embodiment two of the present application (embodiment three);

[0026] Figure 5 A principle schematic view of the drum washing machine of the embodiment three of the present application;

[0027] Figure 6 A principle schematic view of the drum washing machine of the embodiment three of the present application; Figure 5 A partial enlarged view (pressure relief state) of the drum washing machine of the embodiment three of the present application;

[0028] Figure 7 Figure 3 is a schematic diagram of the principle of the drum washing machine according to the fourth embodiment of the present application; Figure 5 Figure 4 is a partial enlarged view of Figure 3 (pressure relief state of the first embodiment) ;

[0029] Figure 8 Figure 5 is a schematic diagram of the principle of the drum washing machine according to the fourth embodiment of the present application;

[0030] Figure 9 Figure 6 is a partial enlarged view of Figure 5 (pressure relief state of the first embodiment) ; Figure 8

[0031] Figure 7 is a partial enlarged view of Figure 5 (pressure increase state of the first embodiment) ; Figure 10 Figure 8 Figure 8 is a partial enlarged view of Figure 5 (pressure relief state of the second embodiment) ;

[0032] Figure 11 Figure 8 Figure 9 is a partial enlarged view of Figure 5 (pressure increase state of the second embodiment) ;

[0033] Figure 12 Figure 10 is a schematic diagram of the principle of the drum washing machine according to the fifth embodiment of the present application; Figure 8

[0034] Figure 11 is a bottom view of the drum washing machine according to the fifth embodiment of the present application; Figure 13

[0035] Figure 12 is a perspective view of the drum washing machine according to the fifth embodiment of the present application; Figure 14

[0036] Figure 13 is a partial enlarged view of Figure 12; Figure 15

[0037] Figure 14 is a schematic diagram of the principle of the drum washing machine according to the sixth embodiment of the present application (the first embodiment) ; Figure 16 Figure 15 Figure 15 is a schematic diagram of the principle of the drum washing machine according to the sixth embodiment of the present application (the second embodiment) ;

[0038] Figure 17 Figure 16 is a flow chart of one embodiment of the control method of the drum washing machine according to the seventh embodiment of the present application.

[0039] Figure 18

[0040] Figure 19 DETAILED DESCRIPTION

[0041] A drum washing machine according to the present application will be described in detail below with reference to the accompanying drawings.​​​​​

[0042] As Figures 1-18 shown, the present embodiment provides a front opening type drum washing machine with a non-porous inner drum, which is simple in structure and can greatly reduce the amount of water used for washing by eliminating the need to fill the space between the inner drum and the outer drum with washing / rinsing water. The possibility of dirt adhering between the inner drum and the outer drum is avoided. The user's health and experience are greatly improved, and water resources are greatly saved.

[0043] The drum washing machine of the present embodiment has a housing 19, which includes an upper panel 2, a front panel, a rear panel and a bottom panel. A bottom foot 9 is fixedly installed on the bottom panel to support the entire washing machine. The housing 19 has an outer drum 18 inside, and the outer drum 18 has a coaxially arranged inner drum 17 inside. The outer drum 18 is mainly used to collect the drainage of the inner drum 17 and the drainage of the high-speed centrifugal dehydration of the inner drum 17. The inner drum 17 rotates, preferably with a lifting rib 43 arranged to continuously lift and drop the laundry to wash the laundry. The inner drum 17 is a non-porous structure. The outer drum 18 has a central mounting hole, in which a bearing 12 is fixedly installed. An inner drum shaft 13 fixedly connected to the inner drum 17 passes through the bearing 12 and is connected to a driving motor 16. An openable / closable inner drum door 6 is installed on the front drum opening of the inner drum 17, so that the inner drum 17 has a sealed cabin structure.

[0044] The housing 19 of the present embodiment has an openable / closable machine door 5.

[0045] Example One

[0046] The present embodiment mainly solves the problem of how to accurately determine the water inflow of a non-porous inner drum drum washing machine, and the specific scheme is as follows:

[0047] A drum washing machine includes an inner drum 17 and a water inflow pipeline connected to the inner drum 17. The inner drum 17 is a non-porous inner drum that holds washing water when washing laundry. A flow sensor 1 for detecting the water inflow is arranged on the water inflow pipeline.

[0048] The present embodiment monitors the water inflow by arranging a flow sensor 1 on the water inflow pipeline. When the set water inflow is reached, the water inflow valve 20 is closed, and the water inflow is completed. The present embodiment uses a flow sensor to solve the problem of water inflow according to the set water level of a non-porous inner drum drum washing machine, ensuring the washing effect, and the structure is simple and easy to control.

[0049] Further, the drum washing machine of the present embodiment includes a water inflow valve 20 and a detergent box 3. The water inflow pipeline includes a first water inflow pipeline and a second water inflow pipeline. The outlet end of the water inflow valve 20 is connected to the detergent box 3 through the first water inflow pipeline, and the outlet end of the detergent box 3 is connected to the inner drum 17 through the second water inflow pipeline. The flow sensor 1 is arranged on the first water inflow pipeline or the second water inflow pipeline. Further, the drum washing machine of the present embodiment includes a water inflow valve 20 and a detergent box 3. The water inflow pipeline includes a first water inflow pipeline and a second water inflow pipeline. The outlet end of the water inflow valve 20 is connected to the detergent box 3 through the first water inflow pipeline, and the outlet end of the detergent box 3 is connected to the inner drum 17 through the second water inflow pipeline. The flow sensor 1 is arranged on the first water inflow pipeline or the second water inflow pipeline.

[0050] 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.

[0051] The drum washing machine of the embodiment includes a main controller 4, and the flow sensor 1 is electrically connected to the main controller 4. The main controller 4 can collect the water inlet amount of the inner drum 17 in real time, and close the water inlet valve 20 when the set water inlet amount is reached.

[0052] As an embodiment of the embodiment, the flow sensor 1 is a rotameter, a turbine flow sensor, an ultrasonic flow sensor, an electromagnetic flow sensor, or an orifice flow sensor.

[0053] The flow sensor 1 can be arranged at any position of the water inlet pipeline, and is preferably arranged at the rear of the water inlet valve 20 to accurately measure the water flow entering the sealed inner drum 17. The flow sensor 1 is electrically connected to the main controller 4, and the main controller 4 can collect the water inlet amount of the inner drum 17 in real time, and close the water inlet valve 20 when the set water inlet amount is reached.

[0054] In order to realize water inlet into the non-porous inner drum of the embodiment, the drum washing machine of the embodiment includes a driving motor 16 and an inner drum shaft 13. The driving motor 16 is drivingly connected to the inner drum 17 through the inner drum shaft 13 to drive the inner drum 17 to rotate. The inner drum shaft 13 has a hollow passage 14 communicating with the inside of the inner drum 17. The water inlet pipeline is connected to the hollow passage of the inner drum shaft 13.

[0055] Specifically, the inner drum shaft 13 is connected to the driving motor 16, and the driving motor 16 includes a stator and a rotor. The rotor is fixedly connected to the inner drum shaft 13. A through hole is arranged at the center of the rotor. The water inlet pipeline passes through the through hole of the rotor and is connected to the hollow passage 14 of the inner drum shaft 13.

[0056] Further, 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 passage 14 of the inner drum shaft 13.

[0057] In order to realize the drainage of the non-porous inner drum, the drum washing machine of the embodiment includes an outer drum 18. An inner drum drainage hole is arranged on the side wall of the inner drum 17. A normally closed check valve plug 11 is arranged on the inner drum drainage hole. A jack mechanism 10 is arranged on the outer drum 18 to open the check valve plug 11 for drainage.

[0058] Preferably, a locking mechanism is further arranged on the outer drum 18 to lock the rotation of the inner drum 17. After the locking mechanism locks the inner drum, the jack mechanism 10 opens the check valve plug 11 for drainage.

[0059] In order to achieve dehydration of the non-porous inner cylinder, multiple dehydration holes are opened on the side wall of the inner cylinder 17 in this embodiment. Each dehydration hole is equipped with a centrifugal valve, which opens under the action of centrifugal force to dehydrate and drain water.

[0060] This embodiment also provides a control method for the aforementioned drum washing machine. During the washing / rinsing program, the flow sensor detects the water inlet flow rate in real time. The washing machine calculates the water inlet volume based on the water inlet flow rate and the water inlet time. When the water inlet volume reaches the set water inlet volume of the washing machine, the water inlet stops.

[0061] Front-loading washing machines have multiple water flow rates that users can select, and the washing machine fills the machine with water according to the selected water flow rate.

[0062] Front-loading washing machines have a weighing function for clothes, which determines the water flow rate based on the weight of the clothes.

[0063] Example Two

[0064] like Figures 2-4 As shown, a drum washing machine of this embodiment includes an inner drum 17 and a water inlet pipe. The inner drum is a non-perforated inner drum that holds washing water when washing clothes. It also includes a water measuring device for measuring the amount of water entering the drum. The water inlet pipe is connected to the water measuring device, and the water measuring device is connected to the inner drum.

[0065] The drum washing machine of this embodiment is equipped with a water measuring device. Before water is introduced into the inner drum 1, it enters the water measuring device to measure a certain amount of water. The number of times the water measuring device measures water is determined according to the set water level. This solves the problem of water intake according to the set water level in the drum washing machine without a hole, ensuring the washing effect. The structure is simple and the operation is convenient.

[0066] Furthermore, the water measuring device described in this embodiment includes a water measuring tank 21, which has an inlet and an outlet. The inlet is connected to an inlet pipe, and the outlet is connected to an inner cylinder 17. The outlet is provided with a water outlet control device for controlling the outlet to open when the water volume in the water measuring tank 21 reaches a set value.

[0067] As one implementation method of this embodiment, such as Figure 2 As shown, the water tank 21 is located at the bottom of the inner cylinder 17. The water measuring device includes a water level detection device 22 for detecting the water level in the water tank 21. The water outlet control device is a water tank drain pump 23. When the water level detection device 22 detects that the water level in the water tank 21 has reached a set value, the water tank drain pump 23 starts to pump the water in the water tank 21 into the inner cylinder 17.

[0068] As one implementation method of this embodiment, such asFigure 3 As shown, the water measuring tank 21 is arranged at the upper portion of the inner drum 17, the water measuring device comprises a water level detecting device 22 for detecting the water level of the water measuring tank, the water outlet control device is a water tank drain valve 25, the water tank drain valve 25 is opened to drain the water in the water measuring tank 21 into the inner drum when the water level detecting device 22 detects that the water level in the water measuring tank 21 reaches a set value.

[0069] The water level detecting device 22 in the embodiment is a liquid level sensor, which comprises an air chamber and a sensor unit, the air chamber is communicated with the water measuring tank. Alternatively, the water level detecting device 22 comprises a plurality of water level detecting probes arranged along the depth direction of the water measuring tank.

[0070] As an embodiment of the present embodiment, the water measuring tank 21 is arranged at the upper portion of the inner drum 17, the water outlet is arranged on the bottom wall of the water measuring tank 21, and the water outlet control device is a water tank check valve which keeps the water outlet closed, when the water amount in the water measuring tank reaches a certain value, the water tank check valve is opened under the water pressure gravity, and the water in the water measuring tank 21 is drained into the inner drum 17, and then the water tank check valve resets to keep the water outlet closed.

[0071] The water measuring tank 21 in the embodiment is provided with an overflow hole 24, and the overflow hole 24 is connected with an overflow pipeline for guiding the overflow water in the water measuring tank.

[0072] Preferably, the drum washing machine comprises a drain pipeline 8, and the overflow pipeline is communicated with the drain pipeline 8.

[0073] As an embodiment of the present embodiment, as shown, Figure 4 The water measuring device comprises a heating device 26 arranged in the water measuring tank 21 and a water temperature detecting device for detecting the water temperature in the water measuring tank.

[0074] The present embodiment also provides a control method of the drum washing machine, the washing machine executes a washing / rinsing program, the washing machine controls the washing water to enter the water measuring tank, when the water amount in the water measuring tank reaches a set value, the water inlet is stopped, the water in the water measuring tank is completely drained into the inner drum, the water inlet into the water measuring tank is started again, and the cycle is repeated until the water level in the inner drum reaches a set value, and the water inlet is stopped.

[0075] Further, the washing machine controls the washing water to enter the water measuring tank, when the water amount in the water measuring tank reaches a set value, the water inlet is stopped, the heating device is controlled to heat the washing water, and when the water temperature detecting device detects that the water temperature in the water measuring tank reaches a set value, the water in the water measuring tank is completely drained into the inner drum.

[0076] Example Three

[0077] The embodiment mainly solves the problem of how to ensure the air pressure balance of the sealed cabin of the drum washing machine without a hole inner drum, specifically, the problem of sudden water cut-off of the electromagnetic valve, especially the problem of water cut-off of the tap water pipe network, forming negative pressure to return the washing water in the sealed cabin to the pipe network; or the problem of difficulty in water inflow due to the presence of gas inside.

[0078] As shown in the drawings, Figures 5-7 The drum washing machine of the embodiment includes an inner drum 17, which is a hole-free inner drum for containing washing water when washing clothes, and further includes an air pressure balancing mechanism for connecting the inner drum 17 with the external environment to balance the air pressure inside the inner drum.

[0079] When water inflow, the gas in the sealed cabin of the inner drum can be discharged through the balancing mechanism to ensure air pressure balance.

[0080] When sudden water cut-off, the external atmosphere can quickly enter the sealed cabin of the inner drum and destroy the siphon effect, ensuring air pressure balance and avoiding washing water being sucked into the tap water pipe network.

[0081] For example, during dehydration, the air pressure balancing mechanism can also ensure air pressure balance of the inner drum.

[0082] As an embodiment of the embodiment, the air pressure balancing mechanism includes a pressure equalizing channel 27 arranged on the inner drum 17, one end of the pressure equalizing channel 27 being arranged on the inner drum 17 near the rotation center axis and being always higher than the highest water level position in the inner drum 17.

[0083] The drum washing machine of the embodiment includes a drive motor 16 and an inner drum shaft 13, the drive motor 16 being in transmission connection with the inner drum 17 through the inner drum shaft 13 to drive the inner drum 17 to rotate, the pressure equalizing channel 27 being arranged on the inner drum shaft 13 to connect the inner drum 17 with the external environment, and the highest water level in the inner drum 17 being lower than the inner drum shaft 13. In this way, water in the inner drum can be prevented from flowing out of the pressure equalizing channel.

[0084] The drum washing machine of the embodiment includes an outer drum 18, the inner drum 17 being arranged inside the outer drum 18, water discharged from the inner drum 17 being discharged through the outer drum 18, a drum opening of the inner drum 17 being provided with an inner drum door 6 for closing the inner drum, a drum opening of the outer drum 18 being open, and one end of the pressure equalizing channel 27 being connected with the inner drum 17 and the other end being arranged inside the outer drum 18 and being communicated with the outer drum 18. In this way, in the extreme case, water flowing out of the pressure equalizing channel can also be collected in the outer drum 18.

[0085] Further, an inner drum drain hole is arranged on a side wall of the inner drum 17, a normally closed check valve plug 11 is arranged on the inner drum drain hole, and a jack mechanism 10 for jacking open the check valve plug 11 to drain water is arranged on the outer drum 18.

[0086] Preferably, the outer cylinder 18 is further provided with a locking mechanism for locking the rotation of the inner cylinder, and the locking mechanism locks the inner cylinder, and the ejector rod mechanism pushes the one-way valve plug to open for drainage.

[0087] Further, the drum washing machine of the embodiment comprises 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 passage 14 are respectively arranged in communication with the inside of the inner cylinder 17 and are isolated from each other. In this way, 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 water leakage caused by the water directly discharged through the pressure equalizing hole 27 is prevented.

[0088] Specifically, the hollow passage 27 extends along the central axis of the inner cylinder shaft from one end to the other end, the pressure equalizing hole comprises a first hole section and a second hole section, the first hole section is arranged in parallel with the hollow passage, and one end of the first hole section communicates with the inside of the inner cylinder, one end of the second hole section communicates with the first hole section, and the other end of the second hole section extends to the outer peripheral wall of the inner cylinder shaft and communicates with the inside of the outer cylinder.

[0089] Preferably, the second hole section is arranged perpendicularly to the first hole section to form an L-shaped pressure equalizing hole.

[0090] Further, the inner cylinder shaft 13 is connected to the driving motor 16, the driving motor 16 comprises a stator and a rotor, the rotor is fixedly connected to the inner cylinder shaft, and a through hole is arranged at the center of the rotor; the water inlet pipeline passes through the through hole of the rotor and communicates with the hollow passage of the inner cylinder shaft.

[0091] 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 passage of the inner cylinder shaft.

[0092] The drum washing machine of the embodiment, a plurality of dehydration holes are arranged on the side wall of the inner cylinder 17, and a centrifugal valve is arranged on each dehydration hole, and the centrifugal valve is opened to perform dehydration and drainage under the action of a centrifugal force.

[0093] Example Four

[0094] The embodiment mainly solves the problem of how to ensure that the air pressure in the sealed cabin of the drum washing machine without holes is not unbalanced, specifically, sudden water interruption of the electromagnetic valve, especially water interruption of the tap water pipeline network, forms negative pressure, and washes the washing water in the sealed cabin back to the pipeline network; or there is gas inside, and the water inlet is difficult.

[0095] As Figures 8-12As shown, the drum washing machine of the embodiment includes an inner drum 17, which is a non-porous inner drum for containing washing water when washing clothes, and a pressurizing mechanism and / or a pressure relief mechanism for communicating the inner drum with the external environment to balance the internal pressure of the inner drum 17.

[0096] The pressurizing mechanism includes a pressurizing channel 28 and a negative pressure safety valve 29, which is arranged on the pressurizing channel 28 and is used to unidirectionally guide the pressurizing channel 28 when the internal pressure of the inner drum 17 is less than the atmospheric pressure of the external environment, so that the external environment gas enters the inner drum 17 through the pressurizing channel 28 to pressurize until the internal pressure of the inner drum 17 is balanced with the atmospheric pressure of the external environment, and the negative pressure safety valve 29 is closed.

[0097] The pressure relief mechanism includes a pressure relief channel 30 and a positive pressure safety valve 31, which is arranged on the pressure relief channel 30 and is used to unidirectionally guide the pressure relief channel 30 to release pressure when the internal pressure of the inner drum 17 is greater than the atmospheric pressure of the external environment, until the internal pressure of the inner drum 17 is balanced with the atmospheric pressure of the external environment, and the positive pressure safety valve 31 is closed.

[0098] As shown, Figure 9 When water is supplied, the gas in the sealed cabin of the inner drum 17 is pressurized, and once it is greater than the set value of the positive pressure safety valve, the positive pressure safety valve is opened, and the gas can overflow through the pressure relief channel to ensure pressure balance.

[0099] As shown, Figure 10 When water is suddenly cut off, the gas in the sealed cabin of the inner drum 17 is pressurized, and once it is less than the set value of the positive pressure safety valve, the external atmosphere can quickly enter the sealed cabin and destroy the siphon, ensuring pressure balance and avoiding that washing water is sucked into the water supply network.

[0100] The pressure balance mechanism can also ensure that the internal pressure of the inner drum is balanced during other processes, such as dehydration.

[0101] The drum washing machine of the embodiment includes a driving motor 16 and an inner drum shaft 13, the driving motor 16 is in driving connection with the inner drum 17 through the inner drum shaft 13 to drive the inner drum 17 to rotate, the pressurizing channel 28 and / or the pressure relief channel 30 are arranged on the inner drum shaft 13 to communicate 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.

[0102] The drum washing machine of the embodiment comprises an outer drum 18, 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, the drum opening of the inner drum 17 is provided with an inner drum door 6 for closing the inner drum, the drum opening of the outer drum 18 is open, one end of the pressure boosting channel 28 and / or the pressure relief channel 30 is communicated with the inside of the inner drum 17, and the other end is arranged inside the outer drum 18 and communicated with the inside of the outer drum 18.

[0103] The drum washing machine of the embodiment comprises a water inlet pipeline, the inner drum shaft 13 has a hollow channel 14 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 relief channel 30 and the hollow channel 14 are respectively communicated with the inside of the inner drum 17 and arranged to be isolated from each other.

[0104] As shown in Figure 9 and Figure 10 , the hollow channel 14 extends along the central axis of the inner drum shaft 13 from one end to the other end, the pressure relief channel 30 comprises a first channel section and a second channel section, the first channel section is arranged in parallel with the hollow channel, and one end thereof is communicated with the inside of the inner drum, one end of the second channel section is communicated with the first channel section, and the other end thereof extends to the outer peripheral wall of the inner drum shaft and is communicated with the inside of the outer drum;

[0105] Preferably, the second channel section is arranged perpendicularly to the first channel section to form an L-shaped pressure relief channel.

[0106] The drum washing machine of the embodiment comprises a water inlet pipeline, the inner drum shaft 13 has a hollow channel 14 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 relief channel 30 and the hollow channel 14 are respectively communicated with the inside of the inner drum 17 and arranged to be isolated from each other.

[0107] Further, the hollow channel 14 extends along the central axis of the inner drum shaft 13 from one end to the other end, one end of the pressure boosting channel 28 is communicated with the hollow channel 14, and the other end thereof extends to the outer peripheral wall of the inner drum shaft 13 and is communicated with the inside of the outer drum 18.

[0108] Preferably, the pressure boosting channel 28 and the hollow channel 14 are arranged perpendicularly to each other.

[0109] The inner drum shaft of the embodiment is connected to a driving motor, the driving motor comprises a stator and a rotor, the rotor is fixedly connected to the inner drum shaft, a through hole is arranged at the center of the rotor, and the water inlet pipeline is communicated with the hollow channel of the inner drum shaft through the through hole of the rotor.

[0110] 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 drum shaft.

[0111] AsFigure 11 and Figure 12 As shown, the pressure boosting channel 28 and the pressure relief channel 30 are both located on the inner cylinder shaft 13, and the openings connecting to the atmosphere are both inside the outer cylinder 18; the openings connecting to the sealed chamber of the inner cylinder 17 are both inside the water inlet channel 14 of the inner cylinder shaft 13.

[0112] It can be inferred that the preferred pressure boosting channel 28 and pressure relief channel 30 are both located on the inner cylinder shaft 13, and the openings connecting to the atmosphere are both inside the outer cylinder 18; the openings connecting to the sealed chamber of the inner cylinder 17 are both inside the sealed chamber.

[0113] Example Five

[0114] like Figures 13-16 As shown, a drum washing machine of this embodiment includes an inner drum 17, which is a non-perforated inner drum that holds washing water when washing clothes, and also includes a position detection device for detecting the position of the inner drum.

[0115] The drum washing machine of this embodiment includes a drive motor 16 and an inner drum shaft 13. The drive motor 16 includes a stator and a rotor. The rotor is fixedly connected to the inner drum shaft 13 to drive the inner drum 17 to rotate. The position detection device includes a position sensor 33 and a detection terminal 38. The detection terminal 38 is disposed on the rotor, and the position sensor 33 is fixed at a position corresponding to the detection terminal 38.

[0116] The drum washing machine of this embodiment includes an outer drum 18. The position sensor 33 is disposed on the outer drum 18 on the side close to the drive motor 16. The position sensor 33 is disposed at intervals corresponding to the detected terminal 38.

[0117] As one embodiment of this invention, the position sensor is an electromagnetic position sensor, or a photoelectric position sensor, or a differential voltage sensor, or an eddy current sensor, or a capacitive sensor, or a reed switch sensor, or a Hall effect sensor.

[0118] The drum washing machine of this embodiment includes a locking mechanism 35 for locking the inner drum rotation. The position detection device is used to detect whether the inner drum 17 is locked in place after the locking mechanism 35 locks it, and / or, when the position detection device detects that the inner drum 17 has rotated to a set position, the locking mechanism 35 locks the inner drum 17.

[0119] Further, the locking mechanism 35 is installed on the side wall of the outer drum 18 near the driving motor 16, the locking mechanism 35 includes a locking rod 40 in telescopic movement and a locking motor 41 driving the telescopic movement of the locking rod 40, the rotor of the driving motor 16 is provided with a locking groove 39 matched with the locking rod 40, when the locking rod 40 is inserted into the locking groove 39 under the driving of the locking motor 41, the inner drum 17 is locked.

[0120] In the drum washing machine, the inner drum 17 is provided with an inner drum drain hole in the side wall, a one-way valve plug 11 is installed on the inner drum drain hole, the outer drum is provided with a ejector rod mechanism 10 for ejecting the one-way valve plug 11 to drain water; the locking mechanism 35 locks the inner drum 17, and the ejector rod mechanism 10 ejects the one-way valve plug 11 to drain water.

[0121] Further, the ejector rod mechanism is installed on the outer drum, the ejector rod mechanism includes a ejector rod in telescopic movement and a ejector rod motor driving the telescopic movement of the ejector rod, the ejector rod is inserted into the drain hole of the inner drum through the drum wall of the outer drum to eject the one-way valve plug to drain water.

[0122] The drum washing machine includes a main controller, the position detection sensor, the locking motor and the ejector rod motor are electrically connected with the main controller.

[0123] The drum washing machine includes a main controller, the position detection sensor, the locking motor and the ejector rod motor are electrically connected with the main controller.

[0124] The drum washing machine includes a main controller, the position detection sensor, the locking motor and the ejector rod motor are electrically connected with the main controller.

[0125] The position detection sensor 33 senses the position of the detected terminal 38 on the rotating rotor frame and converts it into a signal, which is fed back to the main controller 4 of the washing machine through the line 43.

[0126] The position of the detected terminal 38 on the rotor frame corresponds to the position of the rotating inner drum.

[0127] The washing machine includes a mounting bracket 32, a fixing knot 34 is fixed on the outer drum, the mounting bracket 32 is provided with the locking motor, the locking rod and the position detection sensor, the rotor frame of the driving motor is provided with the locking groove and the detected terminal 38.

[0128] Example Six

[0129] As Figures 17-18As shown, a drum washing machine of this embodiment includes an inner drum 17 and an outer drum 18. The inner drum 17 is a non-perforated inner drum that holds washing water when washing clothes. The outer drum 18 is coaxially disposed outside the inner drum 17 and is used to collect the water discharged from the inner drum 17 and discharge it through a drain pipe. It also includes a position detection device disposed on the outer drum 18 for detecting the position of the inner drum.

[0130] Furthermore, the position detection device includes a position sensor 37 and a detection terminal 38. The detection terminal 38 is disposed on the inner cylinder 17, and the position sensor 37 is disposed on the inner wall of the outer cylinder 18 and is disposed corresponding to the detection terminal 38 on the inner cylinder 17.

[0131] Preferably, the terminal to be detected 38 is disposed on the side wall of the inner cylinder 17, and the position sensor 37 is disposed on the inner side wall of the outer cylinder 18. The circumference of the inner cylinder 17 where the terminal to be detected 38 is located and the circumference of the outer cylinder 18 where the position sensor 37 is located are concentrically arranged.

[0132] Preferably, the position sensor 37 is disposed on the inner wall located on the upper part of the outer cylinder 18.

[0133] Preferably, the position sensor is an electromagnetic position sensor, or a photoelectric position sensor, or a differential voltage sensor, or an eddy current sensor, or a capacitive sensor, or a reed switch sensor, or a Hall effect sensor.

[0134] The drum washing machine of this embodiment includes a locking mechanism 35 for locking the inner drum rotation. The position detection device is used to detect whether the inner drum 17 is locked in place after the locking mechanism 35 locks it, and / or, when the position detection device detects that the inner drum 17 has rotated to a set position, the locking mechanism 35 locks the inner drum.

[0135] Furthermore, the locking mechanism 35 is installed on the outer cylinder 18. The locking mechanism 35 includes a locking rod that can move telescopically and a locking motor that drives the locking rod to move telescopically. The inner cylinder 17 is provided with a locking groove 39 that cooperates with the locking rod. When the locking rod extends out and inserts into the locking groove 39 under the drive of the locking motor, the inner cylinder 17 is locked.

[0136] like Figure 8 As shown, in one embodiment of this invention, a lifting rib 43 is installed at the locking groove 39 to conceal the locking groove 39. Alternatively, a detection terminal 38 may be installed within the lifting rib 43.

[0137] As one embodiment of this invention, an inner cylinder drain hole is provided on the side wall of the inner cylinder 17, and a normally closed one-way valve plug 11 is installed on the inner cylinder drain hole. A push rod mechanism 10 for pushing open the one-way valve plug 11 to drain water is installed on the outer cylinder 18. After the locking mechanism 35 locks the inner cylinder 17, the push rod mechanism 10 pushes open the one-way valve plug 11 to drain water.

[0138] Furthermore, the push rod mechanism 10 is installed on the outer cylinder 18. The push rod mechanism 10 includes a push rod that can move telescopically and a push rod motor that drives the push rod to move telescopically. The push rod passes through the cylinder wall of the outer cylinder and inserts into the drain hole of the inner cylinder to open the one-way valve plug for drainage.

[0139] The drum washing machine of this embodiment includes a main controller 4, and the position detection sensor, locking motor and top rod motor are all electrically connected to the main controller.

[0140] In this embodiment of the drum washing machine, multiple dehydration holes are opened on the side wall of the inner drum, and centrifugal valves are installed on each dehydration hole. The centrifugal valves open under the action of centrifugal force to dehydrate and drain water.

[0141] Example Seven

[0142] A control method for a drum washing machine, the drum washing machine including an inner drum, a position detection device for detecting the position of the inner drum, and a locking mechanism for locking the rotation of the inner drum, the inner drum being a non-perforated inner drum that holds washing water during washing clothes, the control method including:

[0143] When the position detection device detects that the inner cylinder has rotated to the set position, it controls the locking mechanism to lock the inner cylinder, and / or, after the locking mechanism locks the inner cylinder, the position detection device detects whether the locking is in place.

[0144] like Figure 19 As shown, the washing machine includes a drive motor that drives the inner drum to rotate. During the washing or rinsing program, the washing machine controls the drive motor to decelerate and executes the inner drum to stop rotating program. When the inner drum speed drops below the set safe speed, if the position detection device detects that the inner drum has rotated to the set position, it controls the drive motor to stop rotating and keeps the inner drum in a fixed position, controls the locking mechanism to lock the inner drum, and drains water.

[0145] The washing machine includes a drive motor that drives the inner drum to rotate. During the washing or rinsing program, the washing machine controls the drive motor to decelerate and executes a program to stop the inner drum from rotating. When the inner drum speed drops below the set safe speed, the control locking mechanism locks the inner drum. If the position detection device detects that the inner drum has rotated to the set position, drainage is started; otherwise, drainage is not started.

[0146] The side wall of the inner drum is provided with an inner drum drain hole, a normally closed check valve plug is installed on the inner drum drain hole, a ejector rod mechanism for ejecting the check valve plug to drain water is installed on the outer drum, the drain procedure includes: the locking mechanism locks the inner drum, and the ejector rod mechanism ejects the check valve plug to drain water.

[0147] The washing machine includes a driving motor for driving the inner drum to rotate, in the spin-drying procedure, the washing machine controls the driving motor to slow down and execute the inner drum stop-rotation procedure, when the rotation speed of the inner drum is reduced to below the set safety rotation speed, if the position detection device detects that the inner drum rotates to the set position, the driving motor is controlled to stop rotating and keep the inner drum position, the locking mechanism locks the inner drum, the spin-drying procedure ends, and the door lock is released.

[0148] The washing machine includes a driving motor for driving the inner drum to rotate, in the spin-drying procedure, the washing machine controls the driving motor to slow down and execute the inner drum stop-rotation procedure, when the rotation speed of the inner drum is reduced to below the set safety rotation speed, the locking mechanism locks the inner drum, the spin-drying procedure ends, and the door lock is released, if the position detection device does not detect that the inner drum rotates to the set position, an alarm is given.

[0149] The drum washing machine includes a driving motor and an inner drum shaft, the driving motor includes a stator and a rotor, the rotor is fixedly connected with the inner drum shaft to drive the inner drum to rotate, the position detection device includes a position sensor and a detected terminal, the detected terminal is arranged on the rotor, and the position sensor is fixed at a position corresponding to the detected terminal;

[0150] When the rotor rotates to the position opposite to the detected terminal and the position sensor, the inner drum rotates to the set position, and / or when the locking mechanism locks the inner drum, the rotor rotates to the position opposite to the detected terminal and the position sensor, and the inner drum is locked in place.

[0151] The locking mechanism is arranged on the side wall of the outer drum close to the driving motor, the locking mechanism includes a locking rod that moves in and out and a locking motor that drives the locking rod to move in and out, a locking groove that cooperates with the locking rod is arranged on the rotor of the driving motor, when the locking rod is driven by the locking motor to move out and insert into the locking groove, the inner drum is locked.

[0152] The drum washing machine includes an outer drum, the outer drum is coaxially arranged outside the inner drum to collect the water drained from the inner drum and discharge the water through a drain pipeline, the position detection device includes a position sensor and a detected terminal, the detected terminal is arranged on the inner drum, and the position sensor is arranged on the inner wall of the outer drum and corresponds to the detected terminal on the inner drum;

[0153] When the rotor rotates to the position where the detected end is opposite to the position sensor, the inner cylinder rotates to the set position, and / or, the locking mechanism locks the inner cylinder, and then the rotor rotates to the position where the detected end is opposite to the position sensor, and the inner cylinder is locked in place.

[0154] The locking mechanism is mounted on the outer cylinder, and the locking mechanism comprises a locking rod capable of telescopic movement and a locking motor for driving the telescopic movement of the locking rod. The inner cylinder is provided with a locking groove corresponding to the locking rod. When the locking rod is driven by the locking motor to extend and insert into the locking groove, the inner cylinder is locked.

[0155] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content with the above-mentioned prompt without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned embodiment according to the technical essence of the present application still belongs to the scope of the present application.

Claims

1. A drum-type washing machine, characterized by, The utility model relates to a washing machine, including: an outer drum; an inner drum arranged inside the outer drum, the inner drum being a non-porous inner drum for containing washing water during washing of laundry; a driving motor, a water inlet pipeline and an inner drum shaft, the driving motor being in driving connection with the inner drum through the inner drum shaft to drive the inner drum to rotate, the inner drum shaft having a hollow passage communicating with the inside of the inner drum, the hollow passage extending along the central axis of the inner drum shaft from one end to the other end, the water inlet pipeline being in communication with the hollow passage; a pressurizing passage and a pressure relief passage; wherein the pressurizing passage and the pressure relief passage are arranged on the inner drum shaft, a positive pressure safety valve being arranged on the pressure relief passage and a negative pressure safety valve being arranged on the pressurizing passage; the pressure relief passage comprising a first passage section and a second passage section, the first passage section being arranged in parallel with the hollow passage, one end of the first passage section communicating with the inside of the inner drum, one end of the second passage section communicating with the first passage section and the other end of the second passage section extending to the outer peripheral wall of the inner drum shaft to communicate with the inside of the outer drum; the pressurizing passage being perpendicular to the hollow passage, one end of the pressurizing passage communicating with the hollow passage and the other end of the pressurizing passage extending to the outer peripheral wall of the inner drum shaft to communicate with the inside of the outer drum.

2. The drum-type washing machine according to claim 1, characterized in that, The highest water level in the inner drum is lower than the inner drum shaft.

3. The drum-type washing machine according to claim 2, characterized in that, The water discharged from the inner drum is discharged through the outer drum, the drum opening of the inner drum is provided with an inner drum door for closing the inner drum, and the drum opening of the outer drum is open.

4. The drum-type washing machine according to claim 3, characterized in that, An inner drum drain hole is arranged on the side wall of the inner drum, a normally closed check valve plug is arranged on the inner drum drain hole, and a lifting rod mechanism for lifting the check valve plug to discharge water is arranged on the outer drum.

5. The drum-type washing machine according to claim 4, characterized in that, A locking mechanism for locking the rotation of the inner drum is further arranged on the outer drum, the lifting rod mechanism lifts the check valve plug to discharge water after the locking mechanism locks the inner drum.

6. The drum-type washing machine according to claim 1, characterized in that, The second passage section is arranged perpendicularly to the first passage section to form an L-shaped pressure relief passage.

7. The drum-type washing machine according to claim 1, characterized in that, The driving motor comprises a stator and a rotor, the rotor being fixedly connected with the inner drum shaft, a through hole is arranged at the center of the rotor, and the water inlet pipeline communicates with the hollow passage of the inner drum shaft through the through hole of the rotor.

8. The drum-type washing machine according to claim 7, characterized in that, A first dynamic sealing structure is arranged between the water inlet pipeline and the through hole of the rotor, and a second dynamic sealing structure is arranged between the through hole of the rotor and the hollow passage of the inner drum shaft.

9. The drum-type washing machine according to claim 1, characterized in that, A plurality of dewatering holes are arranged on the side wall of the inner drum, and a centrifugal valve is arranged on each dewatering hole, the centrifugal valve being opened to discharge water under the action of dewatering centrifugal force.

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