CN112095285B - A dehydration control method for washing machine and washing machine - Google Patents

Abstract

The present invention relates to a dewatering control method for washing machine, in which air flow for accelerating foam breaking and/or exhausting is blown into an outer tub when executing dewatering procedure. By the method, the phenomenon of generating a large amount of foam in the dehydration process of the washing machine is avoided, the dehydration efficiency and the washing cleanliness of clothes are improved, and the residues of detergent attached to the clothes are reduced; meanwhile, after the washing machine is dehydrated, the foam in the outer cylinder is prevented from being remained, and the cleanliness of the washing machine is improved. The invention also provides a washing machine, which adopts the dehydration control method to carry out dehydration treatment on the load contained in the inner cylinder.

Description

A dehydration control method for washing machine and washing machine

Technical Field

The present invention belongs to the field of clothing processing equipment, and relates to a clothing processing device having both washing and drying functions, and in particular to a dehydration control method of a washing machine.

Background technique

During the process of washing clothes in the washing machine, when the washing program ends and enters the dehydration program, the detergent in the clothes is thrown out of the inner drum under the action of centrifugal force and enters between the inner and outer drums to form foam, causing the problem of foam remaining in the washed clothes or in the inner drum and/or the sealing window gasket.

At the same time, due to the gradual increase of foam between the inner and outer drums, the foam will wrap around the inner drum, increasing the resistance to the rotation of the inner drum, affecting the increase in the speed of the inner drum, increasing the energy consumption of dehydration, and thus increasing the moisture content of the clothes after dehydration and more detergent residue; in severe cases, the inner drum may be blocked, the temperature of the drive motor may rise too high, and the overheating protection may occur and the machine may stop rotating.

In view of the above-mentioned technical defects, this application is specially proposed.

Summary of the invention

The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a dehydration control method for a washing machine to achieve the purpose of removing foam in the outer drum.

In order to solve the technical problems and achieve the technical effects, the basic design ideas of the technical solutions adopted by the present invention are as follows:

A dehydration control method for a washing machine, when executing a dehydration program, blows an airflow into an outer drum to accelerate foam collapse and/or discharge.

Furthermore, when the dehydration program is started, air flow starts to be blown into the outer drum; preferably, during the dehydration program, air flow starts to be blown into the outer drum after the rotation speed of the inner drum reaches a set value.

Furthermore, the airflow blown into the outer cylinder is heated so that the drying airflow heated to a set temperature is blown into the outer cylinder.

Furthermore, when the dehydration program is executed, a circulating airflow is formed between the outer drum and the air duct, and the circulating airflow is blown into the outer drum to accelerate the foam bursting and/or discharge; preferably, when the circulating airflow flows through the air duct, it is heated so that the temperature of the circulating airflow flowing into the outer drum reaches a set value; preferably, when the circulating airflow flows through the air duct, the water vapor entrained in the circulating airflow is separated and discharged out of the washing machine.

Furthermore, when executing the dehydration program, a circulating airflow of a set time period flows between the outer drum and the external air duct at regular intervals; when the circulating airflow flows, the drain pipe connected to the outer drum is closed; when the circulating airflow stops flowing, the drain pipe connected to the outer drum is opened.

Furthermore, when the dehydration procedure is executed, the gas outside the machine body is blown into the outer cylinder and then discharged from the outer cylinder to form an airflow. When the airflow flows through the outer cylinder, it acts on the foam in the outer cylinder to accelerate the foam bursting and/or discharge. Preferably, when the gas outside the machine body is blown into the outer cylinder, it is heated so that the temperature of the airflow flowing into the outer cylinder reaches a set value.

Furthermore, when the dehydration process is executed, the drain pipe connected to the outer drum is opened, and at least part of the airflow blown into the outer drum from the outside of the machine body is discharged from the drain pipe.

Another object of the present invention is to provide a washing machine, which includes: an outer drum; an inner drum for containing a load and relatively rotatably installed in the outer drum; an air duct for blowing air into the outer drum; and the above-mentioned dehydration control method is used to dehydrate the load contained in the inner drum.

Furthermore, the washing machine can be a washer-dryer with washing and drying functions in the prior art, and a device installed thereon can be used to blow air into the outer drum when the washer-dryer performs a dehydration program; it can also be an ordinary washing machine with only a washing function, and the above-mentioned device can be installed on the washing machine, so that the washing machine can blow air into the outer drum when the dehydration program is performed.

Furthermore, an air duct is provided outside the outer cylinder, and both ends of the air duct are connected to the outer cylinder respectively to form a circulating air path; a fan is provided in the air duct to form a circulating airflow that circulates between the outer cylinder and the air duct; preferably, a heating device for heating the airflow passing through is provided in the air duct; preferably, a separation device for separating water vapor from the airflow passing through is provided in the air duct. Further preferably, in order to ensure the balance of gas pressure in the outer cylinder, an opening equipped with a pressure stabilizing valve is provided on the air duct and/or the outer cylinder, so that when the pressure in the outer cylinder is too low, airflow flows into the air duct to balance the internal air pressure of the outer cylinder.

Furthermore, the outer cylinder is connected to an air inlet duct, the other end of which is connected to the atmosphere outside the machine body; a fan is provided in the duct to blow the external atmosphere into the outer cylinder along the air inlet duct to form an air flow blown into the outer cylinder; preferably, a heating device is provided in the air inlet duct to heat the air flow passing through. Further preferably, the outer cylinder is connected to an exhaust duct, the other end of which is connected to the atmosphere outside the machine body.

Compared with the washing machines in the prior art, the washing machine of the present invention has the following beneficial effects:

Through the above method, the phenomenon of large amount of foam generation is avoided during the dehydration process of the washing machine, the dehydration efficiency and washing cleanliness of the clothes are improved, and the residual detergent attached to the clothes is reduced; at the same time, after the dehydration of the washing machine is completed, the retention of foam in the outer drum is avoided, and the cleanliness of the washing machine is improved. In addition, through the above setting, the application of the above dehydration control method to the washing machine blowing in the circulating airflow and the straight exhaust airflow is realized, avoiding the retention of foam in the outer drum of the washing machine, improving the dehydration efficiency and washing cleanliness of the clothes, and reducing the significant technical progress of the residual detergent attached to the clothes.

At the same time, the method of the present invention is concise, simple in structure, and has significant effect, and is suitable for popularization and use.

In order to make the design concept of the technical solution of the present invention clearer and facilitate further understanding of the beneficial effects brought about by it, some specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

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:

FIG1 is a schematic structural diagram of a washing machine in Embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of a washing machine in Embodiment 2 of the present invention.

Markings in the figure: 1. machine body, 2. outer cylinder, 3. inner cylinder, 4. drain pipe, 5. driving motor, 6. circulating air duct, 7. fan, 8. separation device, 9. heating device, 10. compressor, 11. throttling device, 12. air inlet duct, 13. exhaust duct.

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 ways

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.

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.

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.

As shown in Figures 1 and 2, a washing machine is introduced in an embodiment of the present invention, which includes: an outer drum 2 installed in a body 1, the outer drum 2 has a volume inside and is used to hold washing water; an inner drum 3, used to hold a load, and relatively rotatably installed in the outer drum 2; a driving motor 5, which is assembled in the outer drum 2, and the output end is connected to the inner drum 3, and is used to drive the inner drum 3 to rotate; there are dehydration holes on the wall of the inner drum, and the dehydration holes connect the inner and outer drums to each other for gas and/or washing water to flow through. The washing machine also includes an air duct arranged in the body 1, the air duct is connected to the outer drum 2, so as to blow air into the outer drum 2, and use the blown air to dry the load in the inner drum 3, so that the washed, cleaned and dried load clothes can be directly obtained after the washing machine is finished.

In an embodiment of the present invention, the washing machine can be a washer-dryer with washing and drying functions in the prior art; it can also be an ordinary washing machine with only washing function, and the above-mentioned device is installed on the washing machine, so that the washing machine can blow air into the outer drum when executing the dehydration program.

In the embodiment of the present invention, in order to avoid the problem that foam still remains in the outer drum 2 after the washing machine completes the dehydration process, the following solution is adopted:

The embodiment of the present invention introduces a dehydration control method for a washing machine. When executing the dehydration program, an airflow that accelerates the foam rupture and/or discharge is blown into the outer drum 2, so that the detergent retained in the outer drum 2 will not form a large amount of foam under the action of the airflow, and the foam in the outer drum 2 is accelerated to rupture and flow out of the outer drum 2 under the action of the airflow, and the detergent remaining in the outer drum 2 can be accelerated to flow out of the outer drum 2 under the action of the airflow.

Through the above method, after the washing machine finishes dehydration, the retention of foam in the outer drum is avoided, the dehydration efficiency and washing cleanliness of the clothes are improved, and the residual detergent attached to the clothes is reduced.

Embodiment 1

As shown in FIG1 , this embodiment introduces a washing machine, which includes: an outer drum 2 installed in a machine body 1; an inner drum 3, which is used to hold a load and is relatively rotatably installed in the outer drum 2; a circulating air duct 6 is provided outside the outer drum 2, and both ends of the circulating air duct 6 are respectively connected to the outer drum 2 to form a circulating air path; a fan 7 is provided in the circulating air duct 6 to form a circulating airflow circulating between the outer drum 2 and the circulating air duct 7, and the load in the inner drum 3 is dried by the circulating airflow.

In this embodiment, a heating device 9 for heating the air flow passing through is provided in the circulating air duct 6; the heating device 9 may be any device in the prior art that can heat the gas, such as a heater, a radiator, etc. A separation device 8 for separating water vapor from the air flow passing through is provided in the circulating air duct 6; the separation device 8 may be any device in the prior art that can separate water vapor from the gas, such as a heat absorber that utilizes condensation to separate water vapor, etc.

In this embodiment, the washing machine uses a heat pump system to dry the load in the inner drum. The heat pump system includes a separation device 8 composed of a heat absorber, a throttling device 11, a heating device 9 composed of a radiator, and a compressor 10, which are connected end to end to form a circulation flow channel. A refrigerant is injected into the circulation flow channel. The refrigerant flows in the circulation flow channel and continuously absorbs heat at the heat absorber and dissipates heat at the radiator, so as to separate water vapor and heat the air flow passing through the circulation air duct.

In this embodiment, when the washing machine performs a dehydration procedure, a circulating airflow is formed between the outer drum 2 and the circulating air duct 6, and the circulating airflow is blown into the outer drum 2 to accelerate the foam bursting and/or discharge.

In this embodiment, when the washing machine executes the dehydration program and the circulating air flow flows through the circulating air duct 6, it is heated so that the temperature of the circulating air flow flowing into the outer drum 2 reaches a set value, so that the circulating air flow is blown into the outer drum 2 for heat exchange, thereby increasing the temperature inside the outer drum 2, thereby accelerating the vaporization of water in the outer drum 2, and significantly accelerating the dehydration rate of the load.

In this embodiment, the circulating air duct 6 is connected to a condensed water drain pipe 14 for draining the condensed water separated at the separation device 8 in the circulating air duct 6. In this embodiment, when the washing machine performs a dehydration procedure and the circulating air flow flows through the circulating air duct 6, the water vapor entrained in the circulating air flow is separated, and the separated water is discharged from the washing machine along the condensed water drain pipe 14, so that the water flow separated from the load in the outer drum 2 can be separated in the circulating air duct 6 and discharged from the washing machine from the condensed water drain pipe 14.

In this embodiment, the outer drum 2 is connected to a drain pipe 4 for discharging washing water, and the other end of the drain pipe 4 extends to the outside of the machine body 1. When the washing machine performs the dehydration program, a circulating airflow of a set time period flows between the outer drum 2 and the external circulation air duct 6 at regular intervals. When the washing machine performs the dehydration program, during the time period when the circulating airflow flows, the drain pipe 4 connected to the outer drum 2 is closed, the condensed water drain pipe 14 is opened, and the dehydrated water flow separated from the load is discharged from the condensed water drain pipe 14; during the time period when the circulating airflow stops flowing, the drain pipe 4 connected to the outer drum 2 is opened, and the dehydrated water flow separated from the load is discharged from the drain pipe 4.

Alternatively, a water level sensor for detecting the water level height inside the outer drum 2 of the washing machine may be provided. When the washing machine executes the dehydration program, the water level inside the outer drum 2 is detected. After the water level inside the outer drum reaches the set drainage water level, the circulating airflow stops flowing, the drain pipe opens, and the dehydrated water flow separated from the load is discharged from the drain pipe 4; before the water level inside the outer drum reaches the set drainage water level, the circulating airflow flows, the drain pipe closes, and the dehydrated water flow separated from the load is discharged from the condensed water drain pipe 14.

In this embodiment, when the washing machine starts the dehydration program, air flow begins to be blown into the outer drum 2, so as to blow circulating air flow at intervals during the entire dehydration program running time period, thereby ensuring that too much foam is not generated in the outer drum 2 with maximum efficiency.

In order to reduce the energy consumption of the washing machine, the following settings can also be made: when the washing machine is executing the dehydration program, the air flow is not blown into the outer drum 2 until the rotation speed of the inner drum 3 reaches the set value, so as to blow the circulating air flow at intervals during the operating time period of the dehydration program when foam is most likely to be generated, which can also ensure that too much foam will not be generated in the outer drum 2.

In this embodiment, in order to ensure the balance of gas pressure in the outer cylinder, an opening equipped with a pressure-stabilizing valve is provided on the circulating air duct 6 and/or the outer cylinder 2. The pressure-stabilizing valve is an existing valve body structure that uses the pressure difference on both sides to open and close. It opens accordingly after the pressure difference between the pressure in the outer cylinder and/or the circulating air duct and the external atmospheric pressure reaches a set value, thereby achieving air flow into the outer cylinder and/or the circulating air duct after the pressure in the outer cylinder is too low, so as to balance the internal air pressure of the outer cylinder and avoid the occurrence of the outer cylinder sucking back sewage in the drainage pipe.

Through the above arrangement, dehydration control of the washing machine into which the circulating airflow is blown is realized, thereby achieving the effects of reducing foam in the outer drum, improving the load dehydration efficiency, and reducing detergent residue on the load.

Embodiment 2

As shown in FIG2 , this embodiment introduces a washing machine which includes: an outer drum 2 installed in a machine body 1; an inner drum 3 for holding a load and relatively rotatably installed in the outer drum 2; the outer drum 2 is connected to an air inlet duct 12, and the other end of the air inlet duct 12 is connected to the atmosphere outside the machine body 1; a fan 7 is provided in the air inlet duct 12 to blow the external atmosphere into the outer drum along the air inlet duct to form an air flow blown into the outer drum.

In this embodiment, a heating device 9 for heating the air flow passing through the air inlet duct 12 is provided; the heating device 9 can be any device in the prior art that can heat the gas, such as a heater, a radiator, etc.

In this embodiment, the outer drum 2 is connected to an exhaust duct 13, and the other end of the exhaust duct 13 is connected to the atmosphere outside the body 1, so that all the airflow containing water vapor in the outer drum 2 is discharged out of the washing machine through the exhaust duct 13, thereby achieving the purpose of drying the load in the outer drum 2.

In this embodiment, when the washing machine executes the dehydration program, the air inlet duct 12 is connected to the outer drum 2 to blow air into the outer drum 2, and the air flow blown into the outer drum 2 is used to accelerate the foam in the outer drum 2 to burst and/or discharge.

In this embodiment, when the washing machine executes the dehydration program and the intake air flows through the air inlet duct 12, the heating device 9 provided on the air inlet duct 12 is turned on to heat the intake air flow, so that the temperature of the intake air flow flowing into the outer drum 2 reaches a set value, and the intake air flow is blown into the outer drum 2 for heat exchange, thereby increasing the temperature inside the outer drum 2, thereby accelerating the vaporization of water in the outer drum 2, and significantly accelerating the dehydration rate of the load.

In this embodiment, the outer drum 2 is connected to a drain pipe 4 for discharging washing water, and the other end of the drain pipe 4 extends to the outside of the machine body 1. When the washing machine performs a dehydration program, the drain pipe 4 connected to the outer drum 2 is opened, and the airflow blown into the outer drum 2 from the outside of the machine body 1 is at least partially discharged from the drain pipe 4, so that the dehydrated water separated from the load is discharged from the drain pipe 4. Preferably, in order to increase the exhaust rate of the outer drum 2, the exhaust duct 13 connected to the outer drum 2 can also be opened when the washing machine performs a dehydration program, so that part of the airflow flowing out of the outer drum flows out from the exhaust duct.

In this embodiment, when the washing machine starts the dehydration program, air flow begins to be blown into the outer drum 2, so as to blow circulating air flow at intervals during the entire dehydration program running time period, thereby ensuring that too much foam is not generated in the outer drum 2 with maximum efficiency.

In order to reduce the energy consumption of the washing machine, the following settings can also be made: when the washing machine is executing the dehydration program, the air flow is not blown into the outer drum 2 until the rotation speed of the inner drum 3 reaches the set value, so as to blow the circulating air flow at intervals during the operating time period of the dehydration program when foam is most likely to be generated, which can also ensure that too much foam will not be generated in the outer drum 2.

Through the above arrangement, dehydration control of the washing machine blown into the direct exhaust airflow is realized, thereby achieving the effects of reducing foam in the outer drum, improving the load dehydration efficiency, and reducing detergent residue on the load.

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 as above, 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 (10)

1. A dehydration control method of a washing machine is characterized in that: blowing air flow into the outer cylinder when the dewatering procedure is executed;

When the dehydration procedure is executed, circulating air flows between the outer cylinder and the external air duct for a set period of time at certain intervals, and the circulating air flows are blown into the outer cylinder to accelerate foam rupture and/or discharge in the cylinder;

when the circulating air flows, the drain pipe connected with the outer cylinder is closed; when the circulating air flow stops flowing, a drain pipe connected with the outer cylinder is opened;

Blowing air flow into the outer cylinder after the rotation speed of the inner cylinder reaches a set value in the process of executing the dehydration procedure of the washing machine, so that circulating air flow is blown in at intervals in the operation time period of the dehydration procedure when foam is most easily generated;

When the washing machine executes a dewatering program, the water level in the outer cylinder is detected, after the water level in the outer cylinder reaches a set drainage water level, circulating air flow stops, a drainage pipe is opened, and the dewatering water flow separated from load is discharged from the outside of the drainage pipe; before the water level in the outer cylinder reaches the set water draining level, the circulating airflow flows, the draining pipe is closed, and the dewatering water flow separated from the load is drained from the condensed water draining pipe.

2. The dehydration control method of a washing machine according to claim 1, wherein: when the dewatering process is started, the blowing of air into the outer tub is started.

3. The dehydration control method of a washing machine according to claim 1, wherein: and in the process of executing the dehydration procedure, blowing air flow into the outer cylinder until the rotating speed of the inner cylinder reaches a set value.

4. The dehydration control method of a washing machine according to claim 1, wherein: and heating the air flow blown into the outer cylinder to blow the drying air flow heated to the set temperature into the outer cylinder.

5. A dehydration control method of a washing machine according to any one of claims 1 to 4, characterized in that: when the dehydration procedure is executed, circulating air flow is formed between the outer cylinder and the air duct;

when the circulating air flows through the air duct, heating is carried out to ensure that the temperature of the circulating air flowing into the outer cylinder reaches a set value;

When the circulating air flow passes through the air duct, the water vapor wrapped in the circulating air flow is separated and discharged outside the washing machine.

6. A dehydration control method of a washing machine according to any one of claims 1 to 4, characterized in that: when the dehydration procedure is executed, the air outside the machine body is blown into the outer cylinder and then is discharged from the outer cylinder to form air flow; when the air flow flows through the outer cylinder, foam in the cylinder is accelerated to be broken and/or discharged;

When the air outside the machine body is blown into the outer cylinder, the air is heated to make the temperature of the air flow flowing into the outer cylinder reach the set value.

7. The dehydration control method of a washing machine as claimed in claim 6, wherein: when the dewatering procedure is executed, the drain pipe connected with the outer cylinder is opened, and the air flow blown into the outer cylinder from the outside of the machine body is at least partially discharged from the drain pipe.

8. A washing machine, comprising:

An outer cylinder;

the inner cylinder is used for containing a load and can be installed in the outer cylinder in a relatively rotatable manner;

the method is characterized in that:

the air duct blows air flow into the outer cylinder; the load placed in the inner cylinder is dehydrated by the dehydration control method according to any one of claims 1 to 7.

9. A washing machine as claimed in claim 8, wherein: an air duct is arranged outside the outer cylinder, and two ends of the air duct are respectively connected with the outer cylinder to form a circulating air path; a fan is arranged in the air duct to form circulating air flow which circularly flows between the outer cylinder and the air duct;

A heating device for heating the flowing air flow is arranged in the air duct;

The air duct is internally provided with a separation device for separating water vapor from air flowing through the air duct.

10. A washing machine as claimed in claim 8, wherein: the outer cylinder is connected with an air inlet duct, and the other end of the air inlet duct is connected with the atmosphere outside the machine body; a fan is arranged in the air duct to blow external atmosphere into the outer cylinder along the air inlet duct to form air flow blown into the outer cylinder;

a heating device for heating the flowing air is arranged in the air inlet duct;

the outer cylinder is connected with an exhaust air duct, and the other end of the exhaust air duct is connected with the atmosphere outside the machine body.