JP2017205340A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine which has improved a washing effect by low power consumption and low manufacturing cost.SOLUTION: In an elaborate washing course, a water level corresponding to a cloth amount detected by cloth amount detection means 28 and a detergent amount which is substantially double the standard detergent amount corresponding to the water level are displayed, and after rotating a washing and dewatering tub 1 for predetermined time by supplying water to substantially half of the water level together with the detergent, an agitation operation by a pulsator 2 is performed. Then, after performing a predetermined soaking step, in a washing step, an operation is performed by supplying water to the water level corresponding to the cloth amount. With this constitution, as the operation is performed in the state where detergent concentration is high with low water level, after the detergent liquid has sufficiently permeated in laundry, the laundry is brought into a strong contact with the pulsator 2, and a washing effect can be enhanced by a mechanical force and a detergent force, while suppressing manufacturing cost.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a washing machine that performs washing, rinsing, and dehydration processes.

  Conventionally, this type of washing machine has a high detergency by pumping the foam generated from the dissolved washing liquid upward by rotating centrifugal force and applying the foam from above to the laundry in the washing and dehydrating tub at high speed. The structure which secures and reduces nonuniformity of washing is proposed (for example, refer to patent documents 1).

  FIG. 5 is a longitudinal sectional view of a conventional washing machine described in Patent Document 1, and FIG. 6 is a perspective view in which an outer tub of the washing machine is partially cut away.

  5 and 6, a foam chamber 65 located above the inner bottom portion 41 a of the outer tub 41 is formed on the inner surface of the outer tub 41, and the outer tub is interposed via a packing 45 at the top of the foam chamber 65. The upper part of the foam chamber 65 is sealed with a lid part 66 formed on the cover 46, a part of the lid part 66 forms a part of the circulation path 67, and a foam discharge part 68 is provided at the tip of the circulation path 67. ing. The guide plate 69 constituting the bottom surface of the bubble chamber 65 is formed to be curved upward in the direction of rotation of the inner tank 42 during the bubble stroke.

  When the stroke operation is started after the laundry and the detergent are added, water supply starts, and when the inside of the washing and dewatering tank 42 reaches a predetermined water level, the washing operation is started. In the washing operation, by rotating the washing / dehydrating tub 42, a large amount of air is sent to the washing liquid between the washing / dehydrating tub 42 and the outer tub 41 to mix the washing liquid and the air, thereby generating a large amount of bubbles. . Since the generated foam has a low specific gravity, it moves to the upper part of the washing liquid and vigorously enters the foam chamber 65 while rotating inside the outer tub 41. The foam that has entered the foam chamber 65 has its velocity component converted from the horizontal direction to the vertical direction along the guide plate 69 and pumped upward, and the laundry in the inner tub 42 from the foam discharge section 68 through the circulation path 67. The liquid is discharged from above. As a result, the bubble washing process of the washing operation proceeds.

JP 2004-337333 A

  However, the conventional configuration has a problem that the load applied to the motor increases because the washing and dewatering tub is rotated at a high speed in a state where a large amount of foam is generated.

  Moreover, as a structure for pumping up the foam, many component configurations such as providing a dedicated circulation path in the outer tank are necessary, and there is a problem that the structure becomes complicated.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a washing machine that improves the cleaning effect with a simple configuration with low power consumption.

In order to solve the above-mentioned conventional problems, the washing machine of the present invention includes an outer frame, a water tank supported by vibration isolation inside the outer frame, a washing and dewatering tank rotatably supported in the water tank, A motor for rotationally driving the washing and dewatering tub; an upper frame provided at the upper part of the outer frame; An operation display unit including display means for displaying input setting information of the input setting means, a water level detection means for detecting the water level in the water tank, a cloth amount detection means for detecting the amount of clothes, the motor, and a water supply valve Control means for controlling the drain valve and the like, and sequentially controlling a series of steps of washing, rinsing and dehydration, and the control means corresponds to the cloth amount detected by the cloth amount detecting means in a careful washing course. And corresponding water level In addition to displaying the amount of detergent approximately twice the amount of quasi-detergent, stirring is performed while supplying water with the detergent to a predetermined water level lower than the water level, and then a predetermined soaking process is performed. The water supply is operated up to the water level corresponding to the volume.

  Accordingly, by operating in a state where the detergent concentration at a low water level is high, the laundry can be washed after the detergent liquid has sufficiently penetrated into the laundry, and the cleaning effect can be enhanced.

  The washing machine according to the present invention can perform a washing process in a state where a large amount of foam is generated, and can improve the washing effect.

The longitudinal cross-sectional view of the washing machine in embodiment of this invention Block diagram of the washing machine Operation flowchart of the washing machine Graph showing the relationship between water level and detergent concentration of the washing machine Vertical section of a conventional washing machine Partially cutaway perspective view of the outer tub of the washing machine

  The first invention includes an outer frame, a water tank that is supported in an anti-vibration manner inside the outer frame, a washing and dehydrating tank that is rotatably supported in the water tank, and a motor that rotationally drives the washing and dehydrating tank. An upper frame provided on the upper part of the outer frame; input setting means provided on the upper frame for setting an operation course such as a careful washing course; and input setting information of the input setting means. An operation display unit having a display means, a water level detection means for detecting the water level in the water tank, a cloth amount detection means for detecting the amount of clothing, the motor, a water supply valve, a drain valve, etc. are controlled, washed and rinsed A control means for sequentially controlling a series of steps of dehydration, and the control means includes a water level corresponding to the cloth amount detected by the cloth amount detection means and a standard detergent amount corresponding to the water level in a careful washing course. The amount of detergent is approximately twice that of In addition, a stirring operation is performed while supplying water together with the detergent to a predetermined water level lower than the water level, and then a predetermined soaking process is performed, and then a water level is supplied to a level corresponding to the amount of cloth in the washing process. Is.

  Accordingly, by operating in a state where the detergent concentration at a low water level is high, the washing process is performed after the detergent solution has sufficiently penetrated into the laundry, and the washing effect can be enhanced.

  In particular, the second invention is provided with turbidity detecting means for detecting the turbidity of washing water in the first invention, and the control means is a result of detection by the turbidity detecting means in the washing process of the careful washing course. Thus, after a predetermined amount of drainage is performed, water is supplied to the water level before drainage and the washing process is performed again.

  Thereby, it can suppress that a stain | sticker adheres again to a laundry, and can improve a washing | cleaning effect.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the temperature detecting means for detecting the temperature of the washing water is provided, and the control means is provided in the water tank detected by the temperature detecting means in the washing process of the careful washing course. The stirring strength by the motor is varied according to the temperature detection result of the washing liquid.

  Thereby, the washing effect can be enhanced with low power consumption while suppressing foaming in the water tank.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention, and FIG. 2 is a block circuit diagram of the washing machine.

  In FIG. 1, a pulsator 2 is rotatably disposed at the center bottom of the washing / dehydrating tub 1, and the washing / dehydrating tub 1 is rotatably included in a water tub 3. The substrate 4 is fixed. The water tank 3 is supported from the upper corners of the outer frame 5 via the vibration isolator 6. A back blade 33 is formed on the back surface of the pulsator 2.

  A motor 8 is disposed at the bottom of the substrate 4. The motor 8 transmits rotational force to the rotating shaft 7 via the belt 9 and the mechanism driving unit 10, and rotationally drives the pulsator 2 or the washing / dehydrating tub 1. It is supposed to be. In addition, a flange 11 is fixed to the bottom of the washing / dehydrating tub 1, and the bottom of the washing / dehydrating tub 1 and the rotary shaft 7 are connected and supported by the flange 11.

  A drain valve 12 is provided at the bottom of the water tank 3, and water in the water tank 3 is drained to the outside through the drain hose 13 by opening and closing the drain valve 12.

  On the upstream side of the drain valve 12, there is turbidity detection means 14 that emits and receives infrared rays, detects the turbidity of washing water in the aquarium 3 based on the transmittance and change rate of the infrared rays, and detects the degree of dirt on the clothes. Is provided.

  An air trap 15 is formed at the lower part of the outer peripheral wall of the water tank 3, and is connected to a water level detection means constituted by a pressure sensor or the like with an air pipe 16. Detect water level.

  An upper frame 18 is disposed at the upper part of the outer frame 5, a water supply valve 19 is provided inside the rear part of the upper frame 18, and a detergent case 20 is connected to the water supply valve 19. A detergent storage box 21 is stored in the detergent case 20 so that it can be pulled out. When the water supply valve 19 is energized, the supplied tap water is supplied into the washing and dehydrating tank 1 from the water inlet 22 together with the detergent in the detergent storage box 21.

  A temperature detecting means 23 for detecting the temperature is provided on the inner peripheral wall of the water tank 3 to detect the temperature of the water supplied from the water supply valve 19 and the washing liquid during the stroke operation.

  In the washing and dewatering tub 1, a circulating water channel 30 covered with a circulating water channel lid 31 is formed on the inner peripheral wall, and the lower end of the circulating water channel 30 communicates with the lower space of the pulsator 2, A water outlet 32 is provided at the upper end. As a result, when the pulsator 2 rotates during the stroke operation, the washing liquid in the water tub 3 is lifted into the circulation water channel 30 by the pump-up effect of the back blades 33 and is transferred from the spout 32 to the laundry in the washing and dewatering tub 1. To pour from. Although only one water discharge port 32 is shown in FIG. 1, a plurality of water discharge ports 32 can be provided depending on the capacity of the washing and dewatering tank 1.

A lid 24 for loading and unloading laundry is provided at a substantially central portion of the upper frame 18 so as to be opened and closed. An operation display unit 25 is disposed in front of the upper frame 18, and the operation display unit 25 performs setting of an operation course such as a careful washing course for washing with a detergent concentration higher than a normal detergent concentration. Input setting means (not shown) and display means (not shown) for displaying input setting information of the input setting means and the like are provided, and a control device 26 is provided inside the operation display unit 25. .

  As shown in FIG. 2, the control means 27 of the control device 26 is constituted by a microcomputer or the like, starts operation when power is supplied from a commercial power source, and detects the water level in the water tank 3. Temperature detection means 23 for detecting the temperature of the discharged water, cloth amount detection means 28 for detecting and determining the amount of cloth put into the washing and dewatering tub 1, and storage means 30 for storing various setting contents and detection and measurement results And the like, and the setting contents are displayed on the display means (not shown) based on the contents set by the user's input in the input setting means (not shown) of the operation display unit 25, The operations of the motor 8, the water supply valve 19, the drain valve 12 and the like are controlled via the load driving means 29 constituted by a bidirectional thyristor, a relay, etc., and the respective steps of washing, rinsing and dewatering are controlled.

  The operation and action of the washing machine configured as described above will be described below.

  FIG. 3 is an operation flowchart in the washing course of the washing machine according to the embodiment of the present invention, and FIG. 4 is a graph showing the relationship between the water level of the washing machine and the detergent concentration.

  3 and 4, when a careful washing course is selected and the operation of the washing machine is started, the amount of laundry put into the washing and dewatering tub 1 is detected by the cloth amount detection means 28 (step S1), and the operation is performed. While displaying the water level according to the amount of cloth on the display part 25, the amount of detergent substantially twice as much as the standard detergent amount with respect to the water level according to the amount of cloth is displayed (step S2). 3 and 4 exemplify the case where the laundry of the rated capacity is loaded and the rated water level corresponding to the capacity is displayed.

  When the user pulls out the detergent storage box 21 from the detergent case 20 and stores and sets the displayed amount of detergent (step S3), the water supply valve 19 operates and the washing liquid in which the detergent and water are mixed is poured into the water inlet. Water is supplied from 22 toward the laundry in the washing and dewatering tub 1.

  In step S4, water is supplied to a low water level (a in FIG. 4) that is approximately a half of the rated water level, and at the same time, the laundry in the washing and dewatering tub 1 is rotated at a low speed. The washing liquid is supplied evenly (step S5).

  In step S <b> 6, the initial turbidity of the washing water in the water tub 3 is detected by the turbidity detection unit 14, and the detection result of the initial turbidity is stored in the storage unit 30. Next, the pulsator 2 is driven to stir for the initial dirt removal (step S7). After the initial dirt removal operation, the turbidity of the washing water is detected again (step S8), and the turbidity is detected. The result is stored in the storage means 30.

  In step S9, an extra process is performed. In the soaking process, the stirring operation by the pulsator 2 and the operation of stopping the rotation of the pulsator 2 and allowing the detergent to penetrate into the laundry are repeated. In addition, in the soaking process, the laundry and the pulsator 2 come into strong contact with each other by operating at a low water level and a high detergent concentration (A in FIG. 4). Can be increased.

When the soaking process is completed, water is supplied to the rated water level (b in FIG. 4) (step S10), the process proceeds to the washing process, and the washing and stirring 1 that is the first half of the washing process is performed (step S11). In the washing process, since the agitation is performed at a detergent concentration twice that of the normal detergent (B in FIG. 4), the agitation is performed at a higher detergent concentration, although the detergent concentration is lower than the detergent concentration in the soaking process. Can be increased.

  Next, in step S12, the turbidity detecting means 14 detects the turbidity of the washing water in the water tank 3, and in step S13, the temperature detecting means 23 detects the temperature of the washing water in the water tank 3. The turbidity and water temperature detection results are stored in the storage means 30.

  In step S14, the amount of washing water contamination is determined from the results of turbidity detection 1 in step S6 and turbidity detection 3 in step S12. When it is determined that the amount of dirt is large (YES in step S14), the drain valve 12 is driven to drain a large amount of washing water in the water tank 3 in order to prevent dirt from reattaching to the laundry ( Step S16) After the drainage, the amount of drained water is supplied (Step S19). In the present embodiment, the amount of water to be drained is approximately 2/3 of the amount of water in the water tank 3.

  When it is determined in step S14 that the amount of dirt is small (NO in step S14), the amount of washing water detergent, that is, foaming is large or small from the results of turbidity detection 1 in step S6 and turbidity detection 2 in step S8. Determine whether.

  When it is determined that the amount of detergent input is less than the amount displayed on the operation display unit 25 (step S2) after the cloth amount detection (step S1) and the foaming is small, a detergent is used to prevent the soil from reattaching to the laundry. In order not to drain too much, the water is drained little (step S17), and after draining, the drained water is supplied (step S19). In the present embodiment, the amount of water to be drained is approximately 1/3 of the amount of water in the water tank 3.

  In step S15, the amount of detergent is not small, that is, when it is determined that foaming is appropriate (NO in step S15), normal drainage (FIG. 4c), here, approximately 1 of the amount of water in the aquarium 3. / 2 is drained (step S18), and after draining, the drained water is supplied (c in FIG. 4, step S19). At this time, the detergent concentration becomes a normal concentration (C in FIG. 4).

  Next, in order to adjust foaming in the subsequent washing and stirring, the temperature of the washing water is detected by the temperature detection means 23 (step S20). When it is determined that the water temperature is high (YES in step S20), the strength of stirring is reduced and washing stirring 2 that is the latter half of the washing process is performed (step S21). When it is determined that the water temperature is not high (NO in step S20), the washing agitation 2 that is the latter half of the washing process is performed based on the normal agitation intensity (step S22). When the washing and stirring 2 is completed, the process proceeds to the rinsing process (step S23), and the process proceeds.

  As described above, in the present embodiment, in the careful washing course, the water level corresponding to the amount of cloth detected by the cloth amount detecting means 28 and the amount of detergent approximately twice the standard amount of detergent corresponding to the water level are set. In addition, the washing and dewatering tub 1 was rotated for a predetermined time while supplying water together with the detergent to approximately ½ of the water level, and then the stirring operation by the pulsator 2 was performed, and then a predetermined soaking process was performed. Later, in the washing process, by supplying water to the water level corresponding to the amount of cloth, the laundry liquid is sufficiently permeated into the laundry by operating in a state where the detergent concentration at the low water level is high, and then washing. The object and the pulsator 2 come into strong contact with each other, and the cleaning effect can be enhanced by the mechanical power and the detergent power while suppressing the manufacturing cost.

  Further, in the washing process of the meticulous washing course, according to the result of detection by the turbidity detection means 14, after performing a predetermined amount of drainage, by supplying water to the water level before drainage, the washing process is performed again. The dirt can be prevented from reattaching to the laundry, and the cleaning effect can be enhanced.

  Further, in the washing process of the meticulous washing course, by adopting a configuration in which the stirring strength by the motor 8 is varied according to the temperature detection result of the washing liquid in the water tank 3 detected by the temperature detection means 23, foaming in the tank is achieved. The cleaning effect can be enhanced with low power consumption.

  As described above, the washing machine according to the present invention operates at a low water level and with a high concentration of detergent in the soaking process before the washing process, and is washed with mechanical power and detergent power while suppressing manufacturing costs. Since the effect can be enhanced, it can be applied to other washing machines.

DESCRIPTION OF SYMBOLS 1 Washing and dewatering tank 2 Pulsator 3 Water tank 5 Outer frame 8 Motor 12 Drain valve 14 Turbidity detection means 17 Water level detection means 18 Upper frame body 19 Water supply valve 20 Detergent case 21 Detergent storage box 23 Temperature detection means 25 Operation display part 27 Control Means 28 Cloth amount detection means

Claims (3)

An outer frame, a water tank that is supported in a vibration-proof manner inside the outer frame, a washing and dewatering tank that is rotatably supported in the water tank, a motor that rotationally drives the washing and dehydrating tank, and an upper part of the outer frame An operation display provided with an upper frame provided, input setting means provided on the upper frame for setting a driving course such as a careful washing course, and display means for displaying input setting information of the input setting means, etc. Part, a water level detecting means for detecting the water level in the water tank, a cloth amount detecting means for detecting the amount of clothing, a motor, a water supply valve, a drain valve, etc. Control means for sequentially controlling the water level, and the control means has a water level corresponding to the amount of cloth detected by the cloth amount detecting means and a detergent approximately twice the amount of standard detergent corresponding to the water level in the careful washing course. Along with displaying the quantity and Agitating operation with water with detergent to a predetermined level lower than the water level, then, after a predetermined soak step, the washing step, the washing machine to operate in water until the water level corresponding to the laundry amount. The turbidity detecting means for detecting the turbidity of the washing water is provided, and the control means performs a predetermined amount of drainage according to the result detected by the turbidity detecting means in the washing process of the careful washing course, and then before the drainage. The washing machine according to claim 1, wherein the washing process is performed again by supplying water to a water level. It is equipped with temperature detection means that detects the temperature of the washing water, and the control means can change the stirring strength by the motor according to the temperature detection result of the washing liquid in the water tank detected by the temperature detection means in the washing process of the careful washing course The washing machine according to claim 1 or 2.

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