Dishwasher and control method thereof

Abstract

The invention relates to the technical field of household appliances, and discloses a dish-washing machine and a control method thereof.The dish-washing machine comprises a dish-washing machine body with a dish-washing cavity; the bubble detection device is used for detecting the quantity of bubbles in the dish washing cavity; and the vacuumizing device is arranged outside the dish washing cavity, is communicated with the dish washing cavity and is used for vacuumizing the dish washing cavity so as to eliminate bubbles. According to the dish-washing machine, bubbles can be eliminated in a vacuumizing mode, the vacuumizing device can be arranged outside the dish-washing cavity, so that even if the vacuumizing device breaks down, an operator can maintain the vacuumizing device outside the dish-washing cavity conveniently and rapidly, parts inside the dish-washing cavity do not need to be dismantled, and the operation is convenient. The maintenance process is simple and convenient, and the defect that the interior of the dish washing machine is polluted due to bacterium breeding is overcome. Therefore, the dishwasher provided by the embodiment of the invention can overcome the defects that the dishwasher is inconvenient to maintain and easy to breed bacteria in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a dishwasher and a control method thereof. Background Art

[0002] With the improvement of living standards, dishwashers have gradually entered ordinary households, freeing hands and improving the quality of life. During the washing process, the dishwasher sprays washing liquid containing detergent onto the tableware through the spray arm to rinse the tableware, thereby cleaning the tableware.

[0003] In the related art, in order to prevent detergents from generating a large amount of foam during the washing process, which would cause the washing effect of the dishwasher to deteriorate, or even cause water overflow inside the dishwasher, failure of the electronic components of the dishwasher, and other problems, some dishwashers are equipped with a defoaming impeller, which can defoam the inside of the dishwasher. However, the defoaming impeller is usually located deep in the dishwashing cavity, and multiple parts need to be disassembled to access it, making it difficult to maintain. In addition, the defoaming impeller is used in the dishwashing cavity, and the use environment is relatively humid, which is prone to breeding bacteria, causing harm to the health of users. Summary of the invention

[0004] In view of this, the present invention provides a dishwasher and a control method thereof to solve the problem in the related art that the dishwasher is inconvenient to maintain and is prone to breeding bacteria.

[0005] In a first aspect, the present invention provides a dishwasher, comprising:

[0006] The dishwasher body has a dishwashing cavity;

[0007] A bubble detection device, used to detect the amount of bubbles in the dishwashing cavity;

[0008] The vacuum device is arranged outside the dishwashing cavity and is connected with the dishwashing cavity, and is used for vacuuming the dishwashing cavity to eliminate bubbles.

[0009] Beneficial effect: During use of the dishwasher of the embodiment of the present invention, the bubble detection device can detect the amount of bubbles in the dishwashing cavity. When the amount of bubbles in the dishwashing cavity is too large, the vacuum device can vacuum the dishwasher, thereby reducing the air pressure in the dishwashing cavity, so that the gas in the bubbles will quickly expand and escape from the liquid surface due to the internal and external pressure difference, thereby eliminating the bubbles.

[0010] Therefore, the dishwasher of the embodiment of the present invention can eliminate bubbles by vacuuming. Since the vacuuming device can be arranged outside the dishwashing cavity, even if the vacuuming device fails, the operator can conveniently and quickly repair the vacuuming device outside the dishwashing cavity without removing the internal components of the dishwashing cavity. The maintenance process is simple and convenient, and there is no defect of breeding bacteria and causing contamination to the inside of the dishwasher.

[0011] Therefore, the dishwasher of the embodiment of the present invention can overcome the defects of the dishwasher in the related art that it is difficult to repair and is easy to breed bacteria.

[0012] In an optional embodiment, an air suction hole is formed on the rear side of the dishwashing cavity, and the vacuum extraction device is a vacuum pump connected to the air suction hole.

[0013] Beneficial effect: The vacuum pump can quickly extract the air in the dishwashing cavity, thereby achieving the required vacuum degree in a shorter time, and then quickly defoaming the dishwashing cavity.

[0014] In an optional embodiment, the dishwasher further comprises:

[0015] A vent hole is formed on the wall of the dishwashing cavity;

[0016] The first switch element is connected to the air vent and is used to open or close the air vent.

[0017] Beneficial effect: Through such an arrangement, when the amount of bubbles in the dishwashing chamber decreases, the first switch element can open the air vent, so that the air pressure in the dishwashing chamber returns to normal, thereby preventing the vacuum environment from affecting the normal washing process.

[0018] In an optional embodiment, the bubble detection device comprises:

[0019] The transmitting end is arranged on a side wall of the dishwashing cavity and is located at the bottom of the dishwashing cavity;

[0020] The receiving end is arranged on the cavity wall of the dishwashing cavity and is arranged opposite to the transmitting end.

[0021] Beneficial effect: The light beam emitted by the transmitting end can pass through the liquid containing bubbles, and the optical sensor at the receiving end can measure the change in light intensity after passing through the liquid. When bubbles exist, part of the light will be blocked or changed in direction by the bubbles, resulting in a decrease in the received light intensity.

[0022] Therefore, when there are more bubbles, the bubbles block more light and the light intensity will be lower. When the light intensity value is lower, the bubbles increase. When the light intensity value is higher, the bubbles decrease.

[0023] Since the bubbles are mostly generated from the bottom of the dishwashing cavity, when both the transmitting end and the receiving end are arranged at the bottom of the dishwashing cavity, it can help improve the accuracy of the bubble detection device in detecting the bubbles.

[0024] In an optional embodiment, the dishwasher further comprises: a transparent cover, which is arranged outside the bubble detection device and has an edge that is sealed and connected to the wall of the dishwashing cavity.

[0025] Beneficial effect: The transparent cover can be arranged outside the bubble detection device to protect the bubble detection device, thereby preventing the bubble detection device from being infiltrated with water without affecting the bubble detection device from emitting and receiving light.

[0026] In an optional embodiment, the dishwasher further comprises:

[0027] A water inlet and a water outlet are formed on the dishwasher body, and the water inlet and the water outlet are respectively connected to the dishwashing cavity;

[0028] A second switch element is connected to the water outlet and is used to open or close the water outlet;

[0029] The third switch element is connected to the water inlet and is used to open or close the water inlet.

[0030] Beneficial effect: When a large number of bubbles appear in the dishwashing cavity during the washing process, the second switch element can close the water outlet and the third switch element can close the water inlet, so that the dishwashing cavity is in a sealed state, thereby enabling the vacuum device to vacuum the dishwasher.

[0031] In a second aspect, the present invention further provides a method for controlling a dishwasher, the dishwasher comprising:

[0032] The dishwasher body has a dishwashing cavity;

[0033] A bubble detection device, used to detect the amount of bubbles in the dishwashing cavity;

[0034] A vacuum device is connected to the dishwashing chamber and is used to vacuum the dishwashing chamber to eliminate bubbles;

[0035] Control methods include:

[0036] Obtaining the amount of bubbles detected by the bubble detection device;

[0037] Obtain the corresponding air pressure control strategy based on the amount of bubbles.

[0038] Beneficial effect: In the control method of the dishwasher of the embodiment of the present invention, the bubble detection device can detect the amount of bubbles in the dishwashing cavity. When the amount of bubbles in the dishwashing cavity is too large, the vacuum device can vacuum the dishwasher, thereby reducing the air pressure in the dishwashing cavity, so that the gas in the bubbles will expand rapidly due to the internal and external pressure difference and escape from the liquid surface, thereby eliminating the bubbles.

[0039] Therefore, the control method of the dishwasher in the embodiment of the present invention can control the vacuum device to eliminate bubbles by vacuuming. Since the vacuum device can be arranged outside the dishwashing cavity, even if the vacuum device fails, the operator can quickly and conveniently repair the vacuum device outside the dishwashing cavity without removing the internal components of the dishwashing cavity. The maintenance process is simple and convenient, and there is no defect of breeding bacteria and causing contamination to the inside of the dishwasher.

[0040] Therefore, the control method of the dishwasher in the embodiment of the present invention can timely vacuum the dishwasher cavity when the amount of bubbles in the dishwasher is too large, thereby avoiding the detergent from generating a large amount of foam during the washing process, causing the washing effect of the dishwasher to deteriorate, and even causing water overflow inside the dishwasher, failure of the electronic components of the dishwasher, and other problems. It can also overcome the defects of the related art that the dishwasher is not easy to repair and is prone to breeding bacteria.

[0041] In an optional implementation, obtaining a corresponding air pressure control strategy according to the amount of bubbles includes:

[0042] When the amount of bubbles in the dishwashing cavity is higher than a first preset value, the vacuuming device is controlled to vacuum the dishwashing cavity.

[0043] In an optional embodiment, the dishwasher further comprises:

[0044] A water inlet and a water outlet are formed on the dishwasher body, and the water inlet and the water outlet are respectively connected to the dishwashing cavity;

[0045] A second switch element is connected to the water outlet and is used to open or close the water outlet;

[0046] A third switch element is connected to the water inlet and is used to open or close the water inlet;

[0047] The corresponding air pressure control strategy based on the amount of bubbles also includes:

[0048] When the amount of bubbles is higher than a first preset value, the second switch element is controlled to close the water outlet, and the third switch element is controlled to close the water inlet.

[0049] Beneficial effect: Through such an arrangement, when a large number of bubbles appear in the dishwashing cavity during the washing process of the dishwasher, the second switch element can close the water inlet and outlet to make the dishwashing cavity in a sealed state, thereby allowing the vacuum device to vacuum the dishwasher.

[0050] In an optional embodiment, the dishwasher further comprises:

[0051] A vent hole is formed on the wall of the dishwashing cavity;

[0052] A first switch element, the output end of which is connected to the vent hole, and is used to control the opening and closing of the vent hole;

[0053] The control method also includes:

[0054] When the amount of bubbles is lower than a second preset value, the vacuum pumping device is controlled to stop vacuum pumping, and the first switch element opens the air hole.

[0055] Beneficial effect: Through such a setting, when the amount of bubbles in the dishwasher is lower than the second preset value, the control module can control the vacuum pumping device to stop vacuuming, and the first switch element opens the air vent so that the dishwashing cavity can restore normal air pressure, thereby avoiding the vacuum state affecting the washing process of the dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 A three-dimensional diagram of a dishwasher according to an embodiment of the present invention at an angle;

[0058] Figure 2 is a three-dimensional diagram of a dishwasher according to an embodiment of the present invention at another angle;

[0059] Figure 3 is a three-dimensional diagram of a dishwasher according to an embodiment of the present invention at another angle;

[0060] Figure 4 A transparent cover of a dishwasher according to an embodiment of the present invention;

[0061] Figure 5 is a three-dimensional diagram of another dishwasher according to an embodiment of the present invention;

[0062] Figure 6 is a three-dimensional diagram of another dishwasher according to an embodiment of the present invention;

[0063] Figure 7 The present invention is a flowchart of a method for controlling a dishwasher according to an embodiment of the present invention.

[0064] Description of reference numerals:

[0065] 1. Dishwasher body; 101. Dishwashing cavity; 102. Air extraction hole; 103. Water inlet; 104. Water outlet;

[0066] 201, transmitting end; 202, receiving end;

[0067] 3. Vacuum extraction device;

[0068] 4. a first switching element;

[0069] 5. Transparent cover;

[0070] 6. A second switching element;

[0071] 7. Bowls and baskets;

[0072] 8. Spray arm;

[0073] 9. Control module. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0075] Combine the following Figures 1 to 7 , describing an embodiment of the present invention.

[0076] According to an embodiment of the present invention, on the one hand, a dishwasher is provided, including a dishwasher body 1 , a bubble detection device and a vacuum device 3 .

[0077] The dishwasher body 1 has a dishwashing cavity 101. The bubble detection device is used to detect the amount of bubbles in the dishwashing cavity 101. The vacuum device 3 is arranged outside the dishwashing cavity 101 and is connected to the dishwashing cavity 101, and is used to vacuum the dishwashing cavity 101 to eliminate bubbles.

[0078] During use of the dishwasher of the embodiment of the present invention, the bubble detection device can detect the amount of bubbles in the dishwashing cavity 101. When the amount of bubbles in the dishwashing cavity 101 is too large, the vacuum device 3 can vacuum the dishwasher, thereby reducing the air pressure in the dishwashing cavity 101, so that the gas in the bubbles will expand rapidly due to the internal and external pressure difference and escape from the liquid surface, thereby eliminating the bubbles.

[0079] Therefore, the dishwasher of the embodiment of the present invention can eliminate bubbles by vacuuming. Since the vacuuming device 3 can be arranged outside the dishwashing cavity 101, even if the vacuuming device 3 fails, the operator can quickly and conveniently repair the vacuuming device 3 outside the dishwashing cavity 101 without removing the internal components of the dishwashing cavity 101. The maintenance process is simple and convenient, and there is no defect of breeding bacteria and causing contamination to the inside of the dishwasher.

[0080] Therefore, the dishwasher of the embodiment of the present invention can overcome the defects of the dishwasher in the related art that it is difficult to repair and is easy to breed bacteria.

[0081] In one embodiment, the dishwasher further includes a control module 9. The control module 9 is in communication connection with the bubble detection device and the vacuum device 3, and can control the vacuum device 3 to vacuum the dishwashing cavity 101 when the bubble detection device detects that the amount of bubbles in the dishwashing cavity 101 is higher than a first preset value, thereby achieving defoaming.

[0082] Among them, the control module 9 may include a programmable logic control component (such as a PLC or a CPU), a memory, and electronic components connected to the programmable logic control component, etc., which are well known to those skilled in the art and will not be described in detail here.

[0083] In one embodiment, the control module 9 is disposed on the back of the dishwasher.

[0084] The communication connection can be divided into a wired communication connection and a wireless communication connection. The wired communication connection is preferably, but not limited to, a cable, an optical fiber, etc., which has the advantages of high stability and fast transmission speed.

[0085] The wireless communication connection is preferably, but not limited to, satellite communication, microwave communication, mobile communication, etc., which has the characteristics of high flexibility and ease of movement.

[0086] As a convertible implementation, in an embodiment not shown in the drawings, a playing module and an operating module are formed on the dishwasher.

[0087] When the bubble detection device detects that the amount of bubbles in the dishwasher is greater than a first preset value, the playback module can alarm, thereby letting the user know that the amount of bubbles in the dishwashing cavity 101 is too large, and then controlling the vacuum device 3 through the operation module to vacuum the dishwashing cavity 101 to eliminate the bubbles.

[0088] The playback module is preferably but not limited to a display screen, a display light or a speaker.

[0089] The operating module is preferably but not limited to a touch screen, a joystick or an operating button.

[0090] In one embodiment, an air extraction hole 102 is formed on the cavity wall of the dishwashing cavity 101 , and the vacuum extraction device 3 is a vacuum pump connected to the air extraction hole 102 .

[0091] The vacuum pump can quickly extract the air in the dishwashing cavity 101 , thereby reaching a required vacuum degree in a relatively short time, and then quickly defoaming the dishwashing cavity 101 .

[0092] In one embodiment, the air extraction hole 102 is formed on the rear wall of the dishwashing cavity 101 .

[0093] As a convertible implementation, in an embodiment not shown in the drawings, the air extraction hole 102 can also be optionally formed on the front wall or the side wall of the dishwashing cavity 101 .

[0094] As a convertible implementation, in an embodiment not shown in the drawings, the vacuum device 3 includes a fan, and the air inlet side of the fan is connected to the air suction hole 102.

[0095] The fan has a simple structure and is easy to maintain, which helps reduce the maintenance cost of the dishwasher.

[0096] In one embodiment, the dishwasher further includes a ventilation hole and a first switch element 4 .

[0097] The vent hole is formed on the wall of the dishwashing cavity 101. The first switch element 4 is connected to the vent hole and is used to open or close the vent hole.

[0098] By such arrangement, when the amount of bubbles in the dishwashing cavity 101 decreases, the first switch element 4 can open the air vents, so that the air pressure in the dishwashing cavity 101 is restored to normal, so as to prevent the vacuum environment from affecting the normal washing process.

[0099] The first switch element 4 is preferably, but not limited to, a valve.

[0100] In one embodiment, the bubble detection device includes a transmitting end 201 and a receiving end 202 .

[0101] The transmitting end 201 is disposed on a side wall of the dishwashing cavity 101 and is located at the bottom of the dishwashing cavity 101. The receiving end 202 is disposed on the cavity wall of the dishwashing cavity 101 and is disposed opposite to the transmitting end 201.

[0102] The light beam emitted by the transmitting end 201 can pass through the liquid containing bubbles, and the optical sensor of the receiving end 202 can measure the change in light intensity after passing through the liquid. When bubbles exist, part of the light will be blocked or changed in direction by the bubbles, resulting in a decrease in the intensity of the received light.

[0103] Therefore, when there are more bubbles, the bubbles block more light and the light intensity will be lower. When the light intensity value is lower, the bubbles increase. When the light intensity value is higher, the bubbles decrease.

[0104] Since the bubbles are mostly generated from the bottom of the dishwashing cavity 101, when the transmitting end 201 and the receiving end 202 are both arranged at the bottom of the dishwashing cavity 101, it can help improve the accuracy of the bubble detection device in detecting the bubbles.

[0105] In addition, a bowl basket 7 is further provided in the washing chamber. When the transmitting end 201 and the receiving end 202 are both provided at the bottom of the washing chamber, the transmitting end 201 can be located below the bowl basket 7 and will not be blocked by the bowl basket 7. Figure 1 and Figure 2 As shown, a plurality of bowl baskets 7 can be arranged in sequence in the washing chamber along the vertical direction.

[0106] In one embodiment, Figure 4 As shown, the bubble detection device includes a plurality of transmitting ends 201 and a plurality of receiving ends 202 . The plurality of transmitting ends 201 are arranged at intervals along the horizontal direction, and the plurality of receiving ends 202 are arranged in a one-to-one correspondence with the plurality of transmitting ends 201 .

[0107] Through such an arrangement, the bubble detection device includes multiple groups of optical sensors, thereby being able to obtain multiple groups of bubble quantities, thereby improving the accuracy of the detection value.

[0108] As a convertible implementation method, Figure 5 and Figure 6 As shown, the bubble detection device can also be arranged on the cavity wall of the dishwashing cavity 101 and located at the upper end of the dishwashing cavity 101 .

[0109] In order to prevent the light emitted from the transmitting end 201 from being blocked by the bowl basket 7, there is no need to set the bowl basket 7 at the corresponding position of the bubble detection device.

[0110] As a convertible implementation mode, in an embodiment not shown in the drawings, the bubble detection device can also be selected as an ultrasonic sensor or a capacitive sensor, etc.

[0111] When the bubble detection device is an ultrasonic sensor, the ultrasonic sensor can emit ultrasonic signals. When the ultrasonic wave encounters bubbles, reflection and scattering will occur. The sensor receives the reflected ultrasonic signal and detects the existence and characteristics of the bubble based on the change of the signal.

[0112] When the bubble detection device is a capacitive sensor, when bubbles exist in the liquid, the dielectric constant of the liquid will change, thereby causing a change in the capacitance value. The capacitive sensor can detect this change and output a corresponding signal.

[0113] In one embodiment, the dishwasher further comprises a spray arm 8, which is disposed at the bottom of the dishwashing cavity 101 and is capable of spraying detergent upward.

[0114] In one embodiment, Figure 4 As shown, the dishwasher further includes: a transparent cover 5 is arranged outside the bubble detection device, and the edge of the transparent cover 5 is sealed and connected to the cavity wall of the dishwashing cavity 101.

[0115] The transparent cover 5 can be arranged outside the bubble detection device to protect the bubble detection device, thereby preventing the bubble detection device from being infiltrated with water without affecting the bubble detection device from emitting and receiving light.

[0116] In a preferred embodiment, the edge of the transparent cover 5 is bonded to the cavity wall of the dishwashing cavity 101 by means of a sealant, thereby achieving sealing.

[0117] In an optional embodiment, there are two transparent covers 5 , and the transmitting end 201 and the receiving end 202 of the bubble detection device are respectively arranged in one transparent cover 5 .

[0118] In one embodiment, Figure 3 As shown, the dishwasher further includes a water inlet 103, a water outlet 104, a second switch element 6 and a third switch element.

[0119] The water inlet 103 and the water outlet 104 are formed on the dishwasher body 1. The water inlet 103 and the water outlet 104 are connected to the dishwashing chamber 101. The second switch element 6 is connected to the water outlet 104, and is used to open or close the water outlet 104. The third switch element is connected to the water inlet 103, and is used to open or close the water inlet 103.

[0120] When a large number of bubbles appear in the dishwashing cavity 101 during the washing process, the second switch element 6 can close the water outlet 104 and the third switch element can close the water inlet 103, so that the dishwashing cavity 101 is in a sealed state, thereby allowing the vacuum device 3 to vacuum the dishwasher.

[0121] According to an embodiment of the present invention, Figure 7 As shown, on the other hand, a control method for a dishwasher is provided. The dishwasher includes a dishwasher body 1, a bubble detection device and a vacuum device 3.

[0122] The dishwasher body 1 has a dishwashing cavity 101. The bubble detection device is used to detect the amount of bubbles in the dishwashing cavity 101. The vacuum device 3 is connected to the dishwashing cavity 101 and is used to vacuum the dishwashing cavity 101 to eliminate bubbles.

[0123] The control method includes step S1 and step S2.

[0124] Wherein, step S1 includes: obtaining the amount of bubbles detected by the bubble detection device.

[0125] Step S2 includes: obtaining a corresponding air pressure control strategy according to the amount of bubbles.

[0126] In the control method of the dishwasher of the embodiment of the present invention, the bubble detection device can detect the amount of bubbles in the dishwashing cavity 101. When the amount of bubbles in the dishwashing cavity 101 is too large, the vacuum device 3 can vacuum the dishwasher, thereby reducing the air pressure in the dishwashing cavity 101, so that the gas in the bubbles will quickly expand and escape from the liquid surface due to the internal and external pressure difference, thereby eliminating the bubbles.

[0127] Therefore, the control method of the dishwasher in the embodiment of the present invention can control the vacuum device 3 to eliminate bubbles by vacuuming. Since the vacuum device 3 can be arranged outside the dishwashing cavity 101, even if the vacuum device 3 fails, the operator can quickly and conveniently repair the vacuum device 3 outside the dishwashing cavity 101 without removing the internal components of the dishwashing cavity 101. The maintenance process is simple and convenient, and there is no defect of breeding bacteria and causing contamination to the inside of the dishwasher.

[0128] Therefore, the control method of the dishwasher in the embodiment of the present invention can timely vacuum the dishwasher cavity 101 when the amount of bubbles in the dishwasher is too large, thereby preventing the detergent from generating a large amount of foam during the washing process, causing the washing effect of the dishwasher to deteriorate, and even causing water overflow inside the dishwasher, failure of the electronic components of the dishwasher, and other problems. It can also overcome the defects of the related art that the dishwasher is not easy to repair and is prone to breeding bacteria.

[0129] In one embodiment, step S2 includes step S202.

[0130] Step S202 includes: when the amount of bubbles is higher than a first preset value, controlling the vacuuming device 3 to vacuum the dishwashing chamber 101 .

[0131] Among them, the first preset value can be obtained through experiments, and technical personnel in this field can also adaptively set the first preset value based on experience so as not to affect the washing effect of the dishwasher. It is a numerical value determined by technical personnel in this field, so it will not be described in detail here.

[0132] In one embodiment, the dishwasher further comprises a water inlet 103, a water outlet 104, a second switch element 6 and a third switch element.

[0133] The water inlet 103 and the water outlet 104 are formed on the dishwasher body 1, and the water inlet 103 and the water outlet 104 are connected to the dishwashing cavity 101. The second switch element 6 is connected to the water outlet 104, and is used to open or close the water outlet 104. The third switch element is connected to the water inlet 103, and is used to open or close the water inlet 103.

[0134] Step S2 also includes step S201.

[0135] Step S201 includes: when the amount of bubbles is higher than a first preset value, controlling the second switch element 6 to close the water outlet 104 .

[0136] By such arrangement, when a large number of bubbles appear in the dishwashing cavity 101 during the washing process of the dishwasher, the second switch element 6 can close the water outlet 104, and the third switch element can close the water inlet 103, so that the dishwashing cavity 101 is in a sealed state, thereby enabling the vacuum device 3 to vacuum the dishwasher.

[0137] In one embodiment, the dishwasher further comprises an air vent and a first switch element 4. The air vent is formed on the cavity wall of the dishwashing cavity 101. The output end of the first switch element 4 is connected to the air vent for controlling the opening and closing of the air vent.

[0138] Step S2 also includes step S203.

[0139] Step S203 includes: when the amount of bubbles is lower than a second preset value, controlling the vacuum pumping device 3 to stop vacuum pumping, and the first switch element 4 to open the air hole.

[0140] The second preset value is lower than the first preset value, and the second preset value can be obtained through experiments. Those skilled in the art can also adaptively set the second preset value based on experience, which is well known to those skilled in the art and will not be described in detail here.

[0141] Through such an arrangement, when the amount of bubbles in the dishwasher is lower than a second preset value, the control module 9 can control the vacuum pumping device 3 to stop vacuuming, and the first switch element 4 opens the air vent so that the dishwashing cavity 101 can restore the normal air pressure, thereby avoiding the vacuum state from affecting the washing process of the dishwasher.

[0142] In one embodiment, step S2 also includes step S204.

[0143] Step S204 includes: when the amount of bubbles in the dishwashing cavity 101 is lower than a second preset value, controlling the second switch element 6 to open the water inlet 103 and the water outlet 104, resuming the washing program of the dishwasher, and ending the defoaming program.

[0144] In one embodiment, the bubble detection device is configured to: monitor the amount of bubbles in the washing chamber in real time; when the amount of bubbles is greater than a first preset value, the bubble detection device can feed back a signal to the control module 9 .

[0145] As a convertible implementation, in one embodiment, the bubble detection device can feed back a signal to the control module 9 at every preset time period, and the signal includes the amount of bubbles detected by the bubble detection device at that time.

[0146] In summary, the control method of the dishwasher of the first aspect and the dishwasher of the second aspect of the present invention can eliminate bubbles by vacuuming. Since the vacuuming device 3 can be arranged outside the dishwashing cavity 101, even if the vacuuming device 3 fails, the operator can quickly and conveniently repair the vacuuming device 3 outside the dishwashing cavity 101 without removing the internal components of the dishwashing cavity 101. The maintenance process is simple and convenient, and there is no defect of breeding bacteria and causing contamination to the inside of the dishwasher.

[0147] Therefore, the control method of the dishwasher of the first aspect and the dishwasher of the second aspect of the present invention can overcome the defects of the dishwasher in the related art that it is not easy to repair and is easy to breed bacteria.

[0148] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope of protection claimed by the present invention.

Claims

1. A dishwasher, characterized in that: include: A dishwasher body (1) having a dishwashing cavity (101); A bubble detection device, used for detecting the amount of bubbles in the dishwashing cavity (101); The vacuum extraction device (3) is arranged outside the dishwashing cavity (101) and is connected to the dishwashing cavity (101) and is used to extract a vacuum in the dishwashing cavity (101) to eliminate bubbles.

2. The dishwasher according to claim 1, characterized in that An air extraction hole (102) is formed on the cavity wall of the dishwashing cavity (101), and the vacuum extraction device (3) is a vacuum pump connected to the air extraction hole (102).

3. The dishwasher according to claim 2, characterized in that: Also includes: A vent hole is formed on the wall of the dishwashing cavity (101); A first switch element (4) is connected to the air vent and is used to open or close the air vent.

4. The dishwasher according to any one of claims 1 to 3, characterized in that The bubble detection device comprises: A transmitting end (201) is arranged on a side wall of the dishwashing cavity (101) and is located at the bottom of the dishwashing cavity (101); The receiving end (202) is arranged on the cavity wall of the dishwashing cavity (101) and is arranged opposite to the transmitting end (201).

5. The dishwasher according to claim 4, characterized in that: Also includes: A transparent cover (5) is arranged outside the bubble detection device, and an edge of the transparent cover is sealedly connected to the cavity wall of the dishwashing cavity (101).

6. The dishwasher according to any one of claims 1 to 3, characterized in that Also includes: A water inlet (103) and a water outlet (104) are formed on the dishwasher body (1), and the water inlet (103) and the water outlet (104) are respectively connected to the dishwashing cavity (101); A second switch element (6), connected to the water outlet (104), and used to open or close the water outlet (104); A third switch element is connected to the water inlet (103) and is used to open or close the water inlet (103).

7. A method for controlling a dishwasher, characterized in that: The dishwasher comprises: A dishwasher body (1) having a dishwashing cavity (101); A bubble detection device, used for detecting the amount of bubbles in the dishwashing cavity (101); A vacuum device (3) is connected to the dishwashing chamber (101) and is used to vacuum the dishwashing chamber (101) to eliminate bubbles; The control method comprises: Obtaining the amount of bubbles detected by the bubble detection device; A corresponding air pressure control strategy is obtained according to the amount of bubbles.

8. The control method according to claim 7, characterized in that: The obtaining of the corresponding air pressure control strategy according to the bubble amount includes: When the amount of bubbles in the dishwashing chamber (101) is higher than a first preset value, the vacuum extraction device (3) is controlled to vacuum the dishwashing chamber (101).

9. The control method according to claim 8, characterized in that: The dishwasher also includes: A water inlet (103) and a water outlet (104) are formed on the dishwasher body (1), and the water inlet (103) and the water outlet (104) are respectively connected to the dishwashing cavity (101); A second switch element (6), connected to the water outlet (104), and used to open or close the water outlet (104); a third switch element, connected to the water inlet (103), and used to open or close the water inlet (103); The obtaining of the corresponding air pressure control strategy according to the bubble amount further includes: When the amount of bubbles is higher than a first preset value, the second switch element (6) is controlled to close the water outlet (104), and the third switch element is controlled to close the water inlet (103).

10. The control method according to claim 8, characterized in that: The dishwasher also includes: A vent hole is formed on the wall of the dishwashing cavity (101); A first switch element (4), the output end of which is connected to the vent hole and is used to control the opening and closing of the vent hole; The control method further comprises: When the amount of bubbles is lower than a second preset value, the vacuum pumping device (3) is controlled to stop vacuum pumping, and the first switch element (4) opens the air hole.

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