Washing equipment and control method thereof

Abstract

The invention discloses washing equipment and a control method of the washing equipment, and the washing equipment comprises an inner barrel and an outer barrel, and further comprises a limiting part which is fixed at a barrel opening of the outer barrel and is provided with a limiting part; the limiting part is of an annular structure, is coaxial with the opening of the inner barrel, is arranged at an interval and is used for limiting the inner barrel; the limiting piece is provided with a water flow channel, a water inlet of the water flow channel communicates with a water inlet device of the washing equipment, and a water outlet of the water flow channel communicates with a gap between the outer barrel and the inner barrel; the water quality detection device is used for detecting the amount of stains in water, and the detection end of the water quality detection device is located in a gap between the inner side of the bottom wall of the outer barrel and the outer wall of the inner barrel. According to the water quality detection device, the water quality detection device can accurately detect the stain amount of the inflow water flow which is not in contact with clothes stains, and when the inner barrel vibrates and inclines, the limiting piece makes contact with the inner barrel to limit the inner barrel, and then the vibration amount of the inner barrel is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing equipment, and in particular, relates to a washing equipment and a control method of the washing equipment. Background Art

[0002] As the most widely used household appliance in people's daily life, washing equipment helps people get rid of the trouble of washing clothes and brings great convenience to people. However, with the increasing types and functions of washing equipment, it is difficult to control the end time of the washing process while making it more suitable for users' different washing needs.

[0003] For this reason, some washing equipment is equipped with a detection device that can detect the turbidity of washing water, and decides when to end the washing process based on the comparison result of the detected stain amount and the threshold.

[0004] However, the above-mentioned washing device has a ring frame set at the opening of the outer barrel. Since the ring frame covers the gap between the outer barrel and the inner barrel, water cannot be directly passed into the gap, and more water flow cannot be accumulated in the outer barrel to accurately detect the amount of stains in the water flow.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a washing device and a control method for the washing device, wherein an incoming water flow is introduced into the gap between the outer barrel and the inner barrel through a limiting member, and a large amount of incoming water flow is accumulated in the outer barrel, so that a water quality detection device can accurately detect the amount of stains in the incoming water flow that does not contact the stains on clothes, and when the inner barrel vibrates and tilts, the limiting member contacts the inner barrel to limit it, thereby reducing the vibration of the inner barrel.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] The present invention provides a washing device, comprising an inner barrel and an outer barrel, and further comprising:

[0009] A limiting member, fixed at the barrel mouth of the outer barrel and having a limiting portion;

[0010] The limiting part is an annular structure, coaxial with the opening of the inner barrel and arranged at intervals, and is used to limit the inner barrel;

[0011] The limiting member is provided with a water flow channel, the water inlet of the water flow channel is communicated with the water inlet device of the washing equipment, and the water outlet of the water flow channel is communicated with the gap between the outer tub and the inner tub;

[0012] The water quality detection device is used to detect the amount of dirt in water, and its detection end is located in the gap between the inner side of the bottom wall of the outer barrel and the outer wall of the inner barrel.

[0013] The present invention allows an incoming water flow to pass through a limiter into a gap between the outer tub and the inner tub, so that a relatively large amount of the incoming water flow is accumulated in the outer tub, thereby enabling a water quality detection device to accurately detect the amount of stains in the incoming water flow that does not contact stains on clothes. Furthermore, when the inner tub vibrates and tilts, the limiter contacts the inner tub and limits it, thereby reducing the amount of vibration of the inner tub.

[0014] A further solution of the present invention is: the water quality detection device is installed on the bottom wall of the outer barrel, and its detection end passes through the bottom wall of the outer barrel and is installed to the inner side of the outer barrel. The bottom of the water quality detection device is located outside the bottom wall of the outer barrel and is used to connect the power supply component.

[0015] In the above scheme, by passing the detection end through the bottom wall of the outer barrel and installing it to the inner side of the outer barrel, the amount of dirt in the water flow accumulated at the bottom wall of the inner barrel can be detected more accurately.

[0016] A further solution of the present invention is that the water inlet is located on the top wall of the limiting member, and the top wall is parallel to the plane where the opening of the outer barrel is located.

[0017] In the above solution, by locating the water inlet on the top wall of the limiting member, it is possible to allow the inlet water to flow into the water flow channel of the limiting member without increasing the opening of the outer barrel.

[0018] A further solution of the present invention is: the limiting member is fixed on the side wall of the outer barrel close to its barrel mouth, the water inlet is located at the part where the limiting member contacts the outer barrel, and the outer barrel has an opening that passes through the water inlet.

[0019] In the above scheme, water is introduced into the gap between the outer barrel and the inner barrel through the limiter from the side wall of the outer barrel, thereby saving space above the outer barrel.

[0020] A further solution of the present invention is as follows: the water inlet device comprises a water inlet channel, a first water delivery channel, a second water delivery channel and a switching part, the water inlet channel flows into the inlet water flow of the washing device, and the switching part is used to control the inlet water flow in the water inlet channel to flow to the first water delivery channel or the second water delivery channel;

[0021] The first water delivery channel is communicated with the water inlet of the limiting component, and the second water delivery channel is communicated with the inner barrel.

[0022] In the above scheme, the water flow for washing and / or rinsing is switched to flow into the second water supply channel and the limiter, so that water can be efficiently supplied to the gap between the outer barrel and the inner barrel through the second water supply channel and the limiter.

[0023] A further solution of the present invention is that the switching part includes a first valve component and a second valve component, the first valve component controls the conduction and cutoff between the water inlet channel and the first water transfer channel, and the second valve component controls the conduction and cutoff between the water inlet channel and the second water transfer channel.

[0024] In the above solution, the switching of the inlet water flow between the first water transfer channel and the second water transfer channel is achieved through the first valve member and the second valve member.

[0025] A further solution of the present invention is: the water inlet device is arranged above the limiting member;

[0026] The first water transfer channel is located at a side of the water inlet channel close to the limiting member, and the second water transfer channel is located at a side of the water inlet channel away from the limiting member.

[0027] In the above solution, it is ensured that the water outflow path of the first water transfer channel and the water outflow path of the second water transfer channel do not overlap.

[0028] A further solution of the present invention is: the water quality detection device is an ultraviolet spectrum sensor, and the ultraviolet spectrum sensor detects the amount of stains in water by ultraviolet absorption spectroscopy.

[0029] In the above scheme, the ultraviolet spectrum sensor is used to detect the water flow accumulated in the outer barrel to obtain the accurate amount of dirt in the water.

[0030] The present invention also provides a control method for a washing device, comprising:

[0031] Before the washing and / or rinsing of the washing device begins, the water inlet device introduces water into the water flow channel of the limiting member;

[0032] When the water level in the detection outer barrel is higher than the detection end of the water quality detection device, the water inlet device stops introducing water into the water flow channel.

[0033] A further solution of the present invention is that after the water flow into the water flow channel is stopped, the water quality detection device detects the amount of water stains;

[0034] If the detected amount of dirt remains stable for a set period of time, the washing device records the amount of dirt at this time as a reference value;

[0035] During washing and / or rinsing, the washing machine determines when to end washing and / or rinsing according to the reference value.

[0036] In the above scheme, by obtaining a precise reference value, the determination of ending washing and / or rinsing is made more accurate.

[0037] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0038] 1. The water flow is introduced into the gap between the outer tub and the inner tub through the limiting member, and a large amount of the water flow is accumulated in the outer tub, so that the water quality detection device can accurately detect the amount of stains of the water flow that does not contact the stains on the clothes, and when the inner tub vibrates and tilts, the limiting member contacts the inner tub to limit it, thereby reducing the vibration of the inner tub;

[0039] 2. By switching the water flow for washing and / or rinsing to flow into the second water delivery channel and the stopper, efficient water inflow into the gap between the outer tub and the inner tub through the second water delivery channel and the stopper is achieved;

[0040] 3. By obtaining accurate reference values, the decision on the end of washing and / or rinsing can be made more accurate.

[0041] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0043] Figure 1 It is a cross-sectional structural schematic diagram of an embodiment of a washing device of the present invention;

[0044] Figure 2 It is a perspective structural schematic diagram of a washing device according to an embodiment of the present invention viewed from above;

[0045] Figure 3 It is a schematic cross-sectional view of another embodiment of a washing device of the present invention.

[0046] In the figure: 11, casing; 12, outer barrel; 13, inner barrel; 14, limiter; 141, water inlet; 142, limiter; 21, second water delivery channel; 22, second valve member; 23, water inlet channel; 24, first valve member; 25, first water delivery channel; 26, water delivery port; 3, water quality detection device.

[0047] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0049] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] like Figures 1 to 3 As shown, the present invention provides a washing device and a control method for the washing device, wherein an incoming water flow is introduced into the gap between the outer tub 12 and the inner tub 13 through the limiting member 14, and a large amount of the incoming water flow is accumulated in the outer tub 12, so that the water quality detection device 3 can accurately detect the amount of stains in the incoming water flow without contacting the stains on clothes, and when the inner tub 13 vibrates and tilts, the limiting member 14 contacts the inner tub 13 to limit it, thereby reducing the vibration amount of the inner tub 13.

[0052] Embodiment 1

[0053] like Figure 1 and 2As shown, this embodiment provides a washing device, including an inner barrel 13 and an outer barrel 12, and also includes: a limiting member 14, which is fixed at the barrel mouth of the outer barrel 12 and has a limiting portion 142; the limiting portion 142 is an annular structure, coaxial with the opening of the inner barrel 13 and spaced apart, and is used to limit the inner barrel 13; the limiting member 14 is provided with a water flow channel, the water inlet 141 of the water flow channel is connected to the water inlet device of the washing device, and the water outlet of the water flow channel is connected to the gap between the outer barrel 12 and the inner barrel 13; a water quality detection device 3, used to detect the amount of stains in the water, and its detection end is located in the gap between the inner side of the bottom wall of the outer barrel 12 and the outer wall of the inner barrel 13.

[0054] Specifically, the washing device is preferably a pulsator washing machine, and is further preferably a non-automatic pulsator washing machine, that is, when the user puts clothes into the inner barrel 13, the user needs to manually pour the clothes treatment agent.

[0055] Specifically, an annular groove is arranged around the limiting portion 142, and the inner barrel 13 has a protrusion that can be inserted into the groove. When the inner barrel 13 vibrates, the protrusion is inserted into the groove, so that the groove limits and supports the protrusion, thereby reducing the displacement of the protrusion and the inner barrel 13, and further reducing the vibration of the inner barrel 13.

[0056] In a specific application of this embodiment, the upper part of the limiting portion 142 is a cover body covering the opening of the outer barrel 12, and the lower part is convexly provided with the limiting portion 142. Further, the cover body and / or the limiting portion 142 completely cover the gap between the outer barrel 12 and the inner barrel 13.

[0057] In another specific application of this embodiment, the upper portion of the limiting portion 142 is an annular frame surrounding the opening of the outer barrel 12, and the lower portion of the annular frame contracts outward along its radial direction to form the limiting portion 142. Figure 2 As shown, the annular frame and / or the limiting portion 142 completely covers the gap between the outer barrel 12 and the inner barrel 13 .

[0058] In detail, the inner barrel 13 is also fixedly provided with a balance ring, and the balance ring relies on the flow of liquid inside it to automatically return to the center when vibration occurs. The limiter 14 is used to contact and limit the inner barrel 13 when the internal liquid of the balance ring has not flowed into place, so that the inner barrel 13 will not deviate significantly, thereby assisting the balance ring in returning the inner barrel 13 to the center.

[0059] Therefore, the incoming water flow is introduced into the gap between the outer barrel 12 and the inner barrel 13 through the limiting member 14, and a large amount of the incoming water flow is accumulated in the outer barrel 12, so that the water quality detection device 3 can accurately detect the amount of stains in the incoming water flow without contacting the stains on clothes, and when the inner barrel 13 vibrates and tilts, the limiting member 14 contacts the inner barrel 13 to limit it, thereby reducing the vibration amount of the inner barrel 13.

[0060] In this embodiment, the water quality detection device 3 is installed on the bottom wall of the outer barrel 12, and its detection end passes through the bottom wall of the outer barrel 12 and is installed to the inner side of the outer barrel 12. The bottom of the water quality detection device 3 is located outside the bottom wall of the outer barrel 12 and is used to connect the power supply component.

[0061] By passing the detection end through the bottom wall of the outer barrel 12 and being installed to the inner side of the outer barrel 12 , the amount of dirt in the water flow accumulated at the bottom of the inner barrel 13 can be detected more accurately.

[0062] In this embodiment, the water inlet 141 is located on the top wall of the limiting member 14 , and the top wall is parallel to the plane where the opening of the outer barrel 12 is located.

[0063] Since the water inlet 141 is located on the top wall of the limiting member 14 , it is possible to allow water to flow into the water flow channel of the limiting member 14 without increasing the opening of the outer barrel 12 .

[0064] Specifically, Figure 2 As shown, the water flow channel is preferably a circular through hole that passes through the upper and lower sides of the limiting member 14.

[0065] In this embodiment, the water inlet device includes a water inlet channel 23, a first water supply channel 25, a second water supply channel 21 and a switching part. The water inlet channel 23 flows into the water supply flow of the washing device, and the switching part is used to control the water supply flow in the water inlet channel 23 to flow to the first water supply channel 25 or the second water supply channel 21; the first water supply channel 25 is connected to the water inlet 141 of the limit member 14, and the second water supply channel 21 is connected to the inner barrel 13.

[0066] By switching the water flow for washing and / or rinsing to flow into the second water supply channel 21 and the limiter 14, efficient water inflow into the gap between the outer barrel 12 and the inner barrel 13 through the second water supply channel 21 and the limiter 14 is achieved.

[0067] In this embodiment, the switching part includes a first valve component 24 and a second valve component 22. The first valve component 24 controls the conduction and cutoff between the water inlet channel 23 and the first water transfer channel 25, and the second valve component 22 controls the conduction and cutoff between the water inlet channel 23 and the second water transfer channel 21.

[0068] The first valve member 24 and the second valve member 22 enable the switching of the inlet water flow between the first water delivery channel 25 and the second water delivery channel 21 .

[0069] Specifically, the first valve component 24 and the second valve component 22 are located in a three-way valve group connecting the water inlet channel 23, the first water transmission channel 25 and the second water transmission channel 21. The water inlet of the three-way valve group is connected to the water inlet channel 23, and the two water outlets of the three-way valve group are connected to the first water transmission channel 25 and the second water transmission channel 21 respectively. The first valve component 24 and the second valve component 22 are respectively arranged at the two water outlets. More specifically, the first valve component 24 and the second valve component 22 are both electromagnetic valve components, which are respectively provided with a live wire connected to the outside, and the zero wire is connected in series to lead out a wire connected to the outside, and the ground wire is connected to the outside through the three-way valve group. The washing device controls the positions of the first valve component 24 and the second valve component 22 by controlling the power on and off of the two live wires respectively, thereby controlling the conduction and cutoff between the water inlet channel 23 and the first water transmission channel 25, and controlling the conduction and cutoff between the water inlet channel 23 and the second water transmission channel 21.

[0070] In this embodiment, the water inlet device is arranged above the limiter 14; the first water supply channel 25 is located on the side of the water inlet channel 23 close to the limiter 14, and the second water supply channel 21 is located on the side of the water inlet channel 23 away from the limiter 14.

[0071] Specifically, the water inlet device is located above the outer barrel 12 .

[0072] More specifically, when the washing device is a pulsator washing machine, the water inlet 26 of the first water supply channel 25 is located directly above the gap between the outer barrel 12 and the inner barrel 13, and the water inlet 26 of the second water supply channel 21 is located above the barrel opening of the inner barrel 13 and close to the wall of the inner barrel 13.

[0073] Specifically, the water outlet of the stopper 14 is aligned with the detection end of the water quality detection device 3 in the axial direction of the outer barrel 12. Figure 2 As shown, the water delivery port 26 of the first water delivery channel 25 , the water inlet 141 of the limiting member 14 , and the water outlet of the limiting member 14 are all aligned in the axial direction of the outer barrel 12 .

[0074] This ensures that the water outflow path of the first water delivery channel 25 and the water outflow path of the second water delivery channel 21 do not overlap.

[0075] In this embodiment, the water quality detection device 3 is an ultraviolet spectrum sensor, which detects the amount of dirt in the water by ultraviolet absorption spectroscopy. The ultraviolet spectrum sensor detects the water flow accumulated in the outer barrel 12 to obtain the accurate amount of dirt in the water.

[0076] Specifically, the ultraviolet spectrum sensor uses ultraviolet absorption spectroscopy to detect the amount of stains. The ultraviolet absorption spectroscopy detects the amount of a substance by the corresponding relationship between the substance and its ultraviolet visible spectrum when the substance absorbs light of a specific wavelength to a maximum value. The amount of stains includes a variety of substances that cannot be detected by conventional sensors. Conventional sensors, such as infrared tube sensors, cannot detect organic soluble stains, including oily stains, proteins, laundry detergents and emulsions, while the ultraviolet spectrum sensor can detect insoluble particles while detecting the above-mentioned organic soluble stains. Therefore, the ultraviolet spectrum sensor can obtain a more accurate amount of stains in the water. For tap water that is directly connected to the washing device, does not dissolve the clothing treatment agent, and does not contact the stains on the clothes, further insoluble particles and organic soluble stains are detected, so that it can accurately reflect the amount of stains in the tap water connected to the washing device. The amount of stains in the tap water can be used as a reference value to determine when to end washing and / or rinsing.

[0077] Specifically, by directly comparing the baseline value with the amount of washing water stains detected by the ultraviolet spectrum sensor during washing and / or rinsing, or by analyzing and calculating the amount of washing water stains and then indirectly comparing it with the baseline value, an accurate judgment of when to end washing and / or rinsing can be achieved.

[0078] In this embodiment, the working process of the washing device is as follows: after the user places the clothes and the clothes treatment agent in the inner barrel 13, the washing device energizes the first valve component 24 and deenergizes the second valve component 22, and flows the water flow connected to the washing device into the gap between the outer barrel 12 and the inner barrel 13. When the water level in the outer barrel 12 is detected to be higher than the detection end of the water quality detection device 3, the water flow is stopped. When the detected stain amount remains stable for a set time, the washing device records the stain amount at this time as a reference value;

[0079] Afterwards, the washing device turns off the power to the first valve member 24 and turns on the power to the second valve member 22, and directly passes the water flow connected to the washing device into the inner tub 13 until the preset washing / rinsing water level is reached, and then the second valve member 22 turns off the power to stop the water flow, and the washing / rinsing process begins. During the washing / rinsing process, it is determined when to end the washing / rinsing according to the reference value.

[0080] Specifically, the water level in the outer cylinder is obtained through the detection end of the water quality detection device 3 or the water level sensor to determine whether the water level is higher than the detection end of the water quality detection device 3 .

[0081] In the present embodiment, an incoming water flow is introduced into the gap between the outer barrel 12 and the inner barrel 13 through the limiting member 14, and a relatively large amount of the incoming water flow is accumulated in the outer barrel 12, so that the water quality detection device 3 can accurately detect the amount of stains of the incoming water flow without contacting the stains on the clothes, and when the inner barrel 13 vibrates and tilts, the limiting member 14 contacts the inner barrel 13 to limit it, thereby reducing the vibration of the inner barrel 13; by switching the incoming water flow used for washing and / or rinsing to flow into the second water supply channel 21 and the limiting member 14, efficient water inflow into the gap between the outer barrel 12 and the inner barrel 13 through the second water supply channel 21 and the limiting member 14 is achieved.

[0082] Embodiment 2

[0083] like Figure 3 As shown, this embodiment provides a washing device based on the first embodiment. The difference between the washing device described in this embodiment and the first embodiment is that the limiting member 14 is fixed on the side wall of the outer barrel 12 close to its barrel mouth, the water inlet 141 is located at the part where the limiting member 14 contacts the outer barrel 12, and the outer barrel 12 has an opening that passes through the water inlet 141.

[0084] Furthermore, the water flow channel of the limiting member 14 has a blocking portion inside, so that the water flowing into the water flow channel horizontally hits the blocking portion and then flows out of the limiting member 14 vertically downward.

[0085] In this embodiment, water is introduced into the gap between the outer barrel 12 and the inner barrel 13 from the side wall of the outer barrel 12 through the limiting member 14 , thereby saving space above the outer barrel 12 .

[0086] Embodiment 3

[0087] like Figures 1 to 3 As shown, this embodiment, based on the first and second embodiments, provides a control method for a washing device, including: before the washing and / or rinsing of the washing device starts, the water inlet device introduces water into the water flow channel of the limiting member 14; when the water level in the outer barrel 12 is detected to be higher than the detection end of the water quality detection device 3, the water inlet device stops introducing water into the water flow channel.

[0088] In this embodiment, the control method of the washing device also includes: after stopping the flow of water into the water flow channel, the water quality detection device 3 detects the amount of dirt in the water; if the detected amount of dirt remains stable for a set time, the washing device records the amount of dirt at this time as a reference value; during washing and / or rinsing, the washing device determines when to end washing and / or rinsing according to the reference value.

[0089] In this embodiment, the working process of the washing device is as follows: after the user places the clothes and the clothes treatment agent in the inner barrel 13, the washing device energizes the first valve component 24 and deenergizes the second valve component 22, and flows the water flow connected to the washing device into the gap between the outer barrel 12 and the inner barrel 13. When the water level in the outer barrel 12 is detected to be higher than the detection end of the water quality detection device 3, the water flow is stopped. When the detected stain amount remains stable for a set time, the washing device records the stain amount at this time as a reference value;

[0090] Afterwards, during the washing and / or rinsing process, the washing device de-energizes the first valve component 24 and energizes the second valve component 22, and flows the water flow connected to the washing device into the inner barrel 13, and determines when to end the washing and / or rinsing according to the reference value.

[0091] Specifically, the washing machine obtains the water level in the outer drum through the detection end of the water quality detection device 3 or the water level sensor arranged at the bottom of the outer drum, and determines whether the water level is higher than the detection end of the water quality detection device 3.

[0092] In this embodiment, by obtaining a precise reference value, the determination of ending washing and / or rinsing is made more accurate.

[0093] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A washing device, comprising an inner tub (13) and an outer tub (12), characterized in that: Also includes: A limiting member (14) is fixed at the barrel mouth of the outer barrel (12) and has a limiting portion (142); The limiting portion (142) is an annular structure, coaxial with the opening of the inner barrel (13) and spaced apart, and is used to limit the position of the inner barrel (13); The limiting member (14) is provided with a water flow channel, the water inlet (141) of the water flow channel is connected to the water inlet device of the washing equipment, and the water outlet of the water flow channel is connected to the gap between the outer barrel (12) and the inner barrel (13); The water quality detection device (3) is used to detect the amount of dirt in water, and its detection end is located in the gap between the inner side of the bottom wall of the outer barrel (12) and the outer wall of the inner barrel (13).

2. A washing device according to claim 1, characterized in that: The water quality detection device (3) is installed on the bottom wall of the outer barrel (12), and its detection end passes through the bottom wall of the outer barrel (12) and is installed on the inner side of the outer barrel (12). The bottom of the water quality detection device (3) is located outside the bottom wall of the outer barrel (12) and is used to connect to a power supply component.

3. A washing device according to claim 1, characterized in that: The water inlet (141) is located on the top wall of the limiting member (14), and the top wall is parallel to the plane where the opening of the outer barrel (12) is located.

4. A washing device according to claim 1, characterized in that: The limiting member (14) is fixed on the inner wall of the outer barrel (12) close to its barrel mouth, the water inlet (141) is located at the part where the limiting member (14) contacts the outer barrel (12), and the outer barrel (12) has an opening that passes through the water inlet (141).

5. A washing device according to claim 1, characterized in that: The water inlet device comprises a water inlet channel (23), a first water delivery channel (25), a second water delivery channel (21) and a switching part, wherein the water inlet channel (23) flows into the washing device, and the switching part is used to control the water inlet channel (23) to selectively flow to the first water delivery channel (25) or the second water delivery channel (21); The first water supply channel (25) is connected to the water inlet (141) of the limiting component (14), and the second water supply channel (21) is connected to the inner barrel (13).

6. A washing device according to claim 5, characterized in that: The switching part comprises a first valve component (24) and a second valve component (22), wherein the first valve component (24) controls the connection and cutoff between the water inlet channel (23) and the first water transfer channel (25), and the second valve component (22) controls the connection and cutoff between the water inlet channel (23) and the second water transfer channel (21).

7. A washing device according to claim 5, characterized in that: The water inlet device is arranged above the limiting member (14); The first water transfer channel (25) is located on a side of the water inlet channel (23) close to the limiting member (14), and the second water transfer channel (21) is located on a side of the water inlet channel (23) away from the limiting member (14).

8. A washing device according to any one of claims 1 to 7, characterized in that: The water quality detection device (3) is an ultraviolet spectrum sensor, which detects the amount of dirt in water by ultraviolet absorption spectroscopy.

9. A control method for a washing device according to any one of claims 1 to 8, characterized in that: include: Before the washing and / or rinsing of the washing device begins, the water inlet device introduces water into the water flow channel of the limiting member (14); When the water level in the detection outer barrel is higher than the detection end of the water quality detection device (3), the water inlet device stops introducing water into the water flow channel.

10. A control method for washing equipment according to claim 9, characterized in that: Also includes: After stopping the water flow into the water flow channel, the water quality detection device detects the amount of dirt in the water; If the detected amount of dirt remains stable for a set period of time, the washing device records the amount of dirt at this time as a reference value; During washing and / or rinsing, the washing machine determines when to end washing and / or rinsing according to the reference value.

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