CN102677420B - front load washing machine - Google Patents

Abstract

The present invention provides a drum type washing machine having the advantages of stable washing performance and energy saving. A control unit (82) of the drum type washing machine respectively sets stirring time for washings during a washing process by aiming at a plurality of temperature ranges of washing water at a high temperature side having a temperature higher than a specified temperature according to volume of the washings detected by a cloth volume detection part (85). In the case that a detected temperature of a temperature detection part (73) used for detecting the temperature of the washing water is higher than the specified temperature, the stir of the washings can be performed for the stirring time which is set by aiming at the temperature range containing the detected temperature. In the case that the detected temperature of the temperature detection part is lower than or equal to the specified temperature, the stir of the washings can be performed for the stirring time which is set by aiming at the temperature range of the lowest temperature side, and a heater heats the washing water until the temperature of the washing water reaches the temperature of the temperature range of the lowest temperature side. Therefore, the drum type washing machine can play a stable washing performance corresponding to the temperature of the washing water, and can realize energy saving.

Description

front load washing machine

technical field

The present invention relates to a drum type washing machine for washing laundry accommodated in a rotary drum.

Background technique

For example, in the drum type washing machine described in Patent Document 1, the washing time is set according to the temperature of washing water (water temperature) in the washing tub, thereby ensuring washing performance.

FIG. 4 is a longitudinal sectional view of a conventional front-loading washing machine described in Patent Document 1, and FIG. 5 is a characteristic diagram showing the relationship between water temperature and immersion time in the washing machine.

As shown in FIG. 4 , rotary drum 1 is rotatably arranged in water tank 3 . In addition, one end of a rotating shaft 4 arranged in a substantially horizontal direction is fixed to a rotation center portion of the rotating drum 1 . In addition, a drum pulley 5 is fixed to the other end of the rotating shaft 4 . The motor 6 is connected with the drum pulley 5 through the belt 7, and drives the rotary drum 1 to rotate. An openable and closable cover 8 is provided at the opening of rotary drum 1 . The heater 13 heats the washing water in the water tank 3 . The drain pump 14 drains the wash water in the water tank 3 . In addition, the water supply valve 15 is used to supply washing water (for example, tap water) into the water tank 3 .

Set the soaking program, open the cover 8 to put the laundry into the rotary drum 1, and when the operation starts, the rotary drum 1 is rotated to detect the amount of cloth. Thereafter, when water supply valve 15 is opened to start water supply, chemicals such as detergent in a detergent box (not shown) are supplied into water tank 3 together with the supplied wash water.

When the medicine is supplied, the rotating drum 1 is driven for a predetermined time to perform the medicine dissolving process. Thereafter, the water temperature in the water tank 3 is detected by the water temperature detection unit, and the immersion time is set based on the detected water temperature and the characteristics shown in FIG. 5 . After the immersion for a set period of time is completed, a normal mechanical force-applied washing process, an intermediate dehydration process, a rinsing process, and a dehydration process are performed.

As shown in FIG. 5 , when the water temperature exceeds 30° C. and is less than or equal to 40° C., immersion is performed for two hours. In the case of more than 40°C and less than or equal to 50°C, perform immersion for one hour, and when the temperature exceeds 20°C and less than or equal to 30°C, perform immersion for four hours.

Patent Document 1: Japanese Patent Application Laid-Open No. 11-276766

Contents of the invention

The problem to be solved by the invention

However, the aforementioned conventional drum-type washing machine has a problem in that, for example, when the water temperature is 7° C. to 8° C. or lower in a cold season, unrealistic 6-7 hour soaking is performed.

Therefore, an object of the present invention is to provide a front-loading washing machine that exhibits stable washing performance in accordance with the temperature of washing water.

solutions to problems

In order to solve the above problems, an aspect of the present invention provides a front-loading washing machine comprising: a rotating drum; a water tank in which the rotating drum is rotatably installed; an electric motor that drives the rotating drum to rotate; a water supply unit, It supplies washing water into the above-mentioned water tank; the cloth amount detection unit detects the amount of laundry thrown into the above-mentioned rotary drum; and the circulation pump sprays the washing water in the above-mentioned water tank to the above-mentioned rotary drum through a water circulation path. inside; a heater, which is arranged at the bottom of the water tank to heat the washing water; a temperature detection unit, which detects the temperature of the washing water in the water tank; and a control unit, which controls the motor, the water supply unit, the The circulation pump and the heater are controlled to execute the washing step, the rinsing step, and the dehydration step, wherein the control unit targets the high temperature side with a temperature higher than a predetermined temperature based on the amount of laundry detected by the cloth amount detection unit. The multiple temperature ranges of the washing water set the stirring time of the laundry during the washing process respectively. The stirring time is used to stir the laundry. When the detected temperature of the temperature detection unit is lower than or equal to the above-mentioned predetermined temperature, the laundry is stirred for the stirring time set for the temperature range on the lowest temperature side, and the heating The device heats the wash water until the temperature of the wash water reaches a temperature within the temperature range on the lowest temperature side.

The effect of the invention

The drum-type washing machine of the present invention can realize stable cleaning performance according to the temperature of the washing water.

Description of drawings

Fig. 1 is a longitudinal sectional view of a front-loading washing machine according to an embodiment of the present invention.

Fig. 2 is a circuit block diagram of the drum type washing machine shown in Fig. 1 .

FIG. 3A is a control flowchart of the drum type washing machine shown in FIG. 1 .

FIG. 3B is a control flow diagram of the drum-type washing machine shown in FIG. 1 .

Fig. 4 is a longitudinal sectional view of a conventional drum-type washing machine.

Fig. 5 is a characteristic diagram showing the relationship between water temperature and immersion time in a conventional front-loading washing machine.

Explanation of reference signs

42: water tank; 43: rotating drum; 45: electric motor; 56: water circulation path; 54: water supply system (water supply part); 67: circulation pump; 70: ejection outlet; 72: heater; 73: temperature detection part; 76: Water level detection part; 82: control part; 85: cloth amount detection part.

Detailed ways

The present invention is a drum-type washing machine, which includes: a rotating drum; a water tank in which the above-mentioned rotating drum is freely rotatable; an electric motor that rotates the above-mentioned rotating drum; water; a cloth amount detection unit, which detects the amount of laundry thrown into the rotary drum; a circulation pump, which sprays the washing water in the water tank into the rotary drum through a water circulation path; a heater, which is The washing water is heated at the bottom of the water tank; the temperature detection unit detects the temperature of the washing water in the water tank; and the control unit controls the electric motor, the water supply unit, the circulation pump, and the heater. control to perform a washing process, a rinsing process, and a dehydration process, wherein the control unit controls a plurality of temperatures of the washing water on the high temperature side higher than a predetermined temperature based on the amount of laundry detected by the cloth amount detection unit. The range sets the stirring time of the laundry during the cleaning process, and when the detected temperature of the temperature detection unit is higher than the above-mentioned predetermined temperature, the laundry is stirred at the stirring time set for the temperature range including the detected temperature. , when the temperature detected by the temperature detection unit is lower than or equal to the predetermined temperature, the laundry is stirred for the stirring time set for the temperature range on the lowest temperature side, and the washing water is heated by the heater until The temperature of the washing water reaches a temperature within the temperature range on the lowest temperature side.

The drum-type washing machine can exhibit stable cleaning performance according to the temperature of the washing water.

It is preferable to set the stirring time separately for each temperature range, and the higher the temperature range is, the shorter the stirring time is set. When the washing water is at a high temperature, the detergent is easily activated, so the stirring time can be shortened. Thereby, the front-loading-type washing machine can realize energy saving.

It is preferable that the stirring time set for each temperature range is longer as the amount of laundry increases. Thereby, the front-loading-type washing machine can exhibit stable cleaning performance according to the amount of laundry.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to this embodiment.

(Embodiment 1)

Fig. 1 shows a longitudinal sectional view of a front-loading washing machine in an embodiment of the present invention.

As shown in FIG. 1 , a water tub 42 is provided in a washing machine cabinet 41 so as to be able to swing freely. A rotary drum 43 is rotatably disposed in the water tank 42 . A rotation shaft (rotation center shaft) 44 extending in the horizontal direction is provided at a rotation center portion of the rotation drum 43 . A motor 45 installed near the rear side of the water tank 42 is connected to the rotating shaft 44 via a belt 46 . The rotary drum 43 is rotationally driven by the motor 45 in the forward rotation and reverse rotation directions. A plurality of protruding plates 47 for agitating the laundry are provided on an inner wall surface of the rotary drum 43 . In addition, a large number of water passage holes 48 are provided on the entire surface of the outer peripheral portion of the rotary drum 43 .

The water tank unit 49 is comprised from the water tank 42, the rotary drum 43, the motor 45, etc. The water tank unit 49 is supported in a vibration-proof manner by a plurality of spring bodies 50 provided at the upper portion of the washing machine cabinet 41 and a plurality of anti-vibration dampers 51 provided at the lower portion of the washing machine cabinet 41 .

Moreover, the front side of the water tank 42 is provided with the cover body 52 which covers the opening part provided in the washing machine cabinet 41 openably and closably. By opening the lid body 52 , the laundry can be taken out from the rotary drum 43 through the laundry inlet and outlet 53 or put into the rotary drum 43 .

In addition, this front-loading washing machine is configured such that the motor 45, the first solenoid valve 57, the second solenoid valve 58, the drain pump 63, and the circulation pump 67 are controlled by the control unit 82 (see FIG. 2 ) according to the mode setting and the control program. , and use the water supply path 54 , the drain path 55 and the water circulation path 56 to at least perform a washing process, a rinsing process, and a dehydration process.

The water supply path 54 includes a first solenoid valve 57 (first water supply unit), a second solenoid valve 58 (second water supply unit), a first water supply hose 59 , a second water supply hose 60 , a detergent container 61 and In the water supply path 62, the detergent storage part 61 accommodates a drawer part (not shown) for storing detergent and softener so that the drawer can be drawn out to the outside. By opening the first solenoid valve 57 or the second solenoid valve 58 , wash water (for example, tap water) flows into the first water supply hose 59 or the second water supply hose 60 . The wash water flowing into the first water supply hose 59 or the second water supply hose 60 is supplied into the water tank 42 through the detergent container 61 and the water supply path 62 .

The drain path 55 is composed of a drain pipe 64 connected to the bottom of the water tank 42, a drain filter 65, a drain pump 63, and a drain hose 66. The drain filter 65 collects lint and the like in the washing water. And it can be detached to the outside, and this drain hose 66 is arranged so that it may go from the inner lower part of a washing machine toward the outer upper part of a washing machine. The drain pump 63 is driven at the end of the washing process, at the end of the rinsing process, and the like. Driven by the drain pump 63, the washing water is discharged through the drain pipe 64, the drain filter 65, the drain pump 63, and the drain hose 66 in sequence.

A water circulation path 56 is provided to circulate the washing water in the water tank 42 during the pre-washing process, the washing process, the rinsing process, and the like. Through the water circulation path 56, the detergent can be quickly dissolved into the washing water, and uneven distribution of the detergent can be prevented. As a result, the washing and rinsing capabilities of the front-loading washing machine can be improved.

The water circulation path 56 is configured to include a drain pipe 64, a drain filter 65, an inflow side path 68 flowing to a circulation pump 67, a circulation pump 67, a discharge side path 69 flowing from the circulation pump 67, and a discharge port 70. It is installed at the front of the water tank 42 and sprays washing water into the rotary drum 43 . Driven by the circulation pump 67, the washing water in the water tank 42 passes through the drain pipe 64, the drain filter 65, the inflow side path 68, the circulation pump 67, the discharge side path 69, and the discharge port 70, as indicated by solid arrows. The circulating water is sprayed into the rotating drum 43. In addition, a plurality of spray ports 70 are arranged along the circumferential direction of rotary drum 43 , so that the circulating water is sprayed onto the laundry in rotary drum 43 from multiple directions.

In addition, in order to heat the washing water, a heater 72 constituted by a jacket heater or the like is provided in a concave portion 71 formed at the bottom of the water tub 42 . The heater 72 is arranged such that its longitudinal direction coincides with the horizontal direction. The washing water in the water tub 42 is heated by the heater 72 in accordance with the operation program selected by the user or the like. Wash water heated by heater 72 is sprayed into rotary drum 43 and sprayed onto the laundry. In addition, heated wash water is circulated through water circulation path 56 . As a result, the molecular movement of the washing water is activated, and the detergent is activated, and as a result, the cleaning ability of the washing water is improved. With this washing water having improved washing performance, uneven washing of the laundry can be reduced. In addition, a temperature detection unit 73 such as a thermistor that detects the temperature of the washing water is provided near the heater 72 .

In addition, an air trap 74 communicating with the drain pipe 64 is formed on the side wall behind the bottom of the water tank 42 . The air trap 74 is connected via an air pipe 75 to a water level detection unit 76 provided in the upper part of the washing machine cabinet 41 and composed of a pressure sensor or the like. The water level of the washing water in the water tank 42 can be detected based on the water pressure of the washing water in the water tank 42 , that is, the corresponding pressure in the air trap 74 .

In addition, an upper rear surface side upper portion of the detergent storage portion 61 provided in the upper portion of the washing machine cabinet 41 communicates with the upper portion of the water tank 42 via a connection hose 77 . Accordingly, the air in the water tank 42 pressurized by the operation of the process is discharged to the outside of the water tank 42 .

In addition, a vibration detection unit 78 including an acceleration sensor for detecting vibration of the water tank unit 49 is disposed on the rear portion of the upper surface of the water tank 42 . The acceleration sensor does not detect vibration in only one direction, but detects vibration in three directions: front-rear direction (X-axis direction), left-right direction (Y-axis direction), and up-down direction (Z-axis direction). The actual vibration of the water tank unit 49 is not limited to vibration in one direction. Therefore, the vibration of the water tank unit 49 is detected with high accuracy using an acceleration sensor capable of detecting vibration in three directions. The control unit 82 controls the operation based on the detection result of the vibration detection unit 78 .

The user sets modes such as an operation program and various functions by inputting to the input setting unit 80 of the operation display unit 79 provided on the upper front surface of the washing machine cabinet 41 . Based on the input setting information, the control device 81 arranged at the upper part of the washing machine cabinet 41 notifies the user of the setting content through the display unit 96 (see FIG. 2 ) on the operation display unit 79 .

Fig. 2 is a circuit block diagram of the front-loading washing machine according to the embodiment of the present invention.

As shown in FIG. 2 , the control unit 82 of the control device 81 is composed of a microcomputer or the like, and when the power switch 84 is turned on, electric power is supplied from a commercial power supply 83 to start operation. In addition, the control unit 82 is based on the output from the water level detection unit 76, the temperature detection unit 73, the cloth amount detection unit 85 for detecting the amount of laundry thrown into the rotary drum 43 (the amount of cloth), and the vibration detection unit 78. The user enters the setting information input by the setting unit 80 to display the setting content on the display unit 96, and the motor 45, the heater 72, the first The operations of the solenoid valve 57, the second solenoid valve 58, the drain pump 63, the circulation pump 67, and the like are controlled. Accordingly, control unit 82 causes the front-loading washing machine to execute the washing process, the rinsing process, and the dehydration process. Also, when there is some abnormality in the operation, the control unit 82 notifies the user of the abnormality through the display unit 96 . In addition, the operation display unit 79 is configured to include the input setting unit 80 and the display unit 96 .

The operation of the front-loading washing machine configured as described above will be described.

Home appliances such as front-loading washing machines are often used in global applications such as Southeast Asia and Europe. In order to develop home appliances rationally, standards for home appliances should be shared as much as possible, except in the case of overseas and local requirements.

In Europe, there are many cold regions and regions with poor water quality. Therefore, a heater for heating wash water is required as standard equipment in a drum-type washing machine for European use. In addition, in areas with poor water quality in Southeast Asia, such as Thailand and Malaysia, where the temperature is high throughout the year, there is a consumer demand for washing with warm water. Therefore, heaters are also installed in drum-type washing machines used in areas where the temperature is high throughout the year.

However, for example, in Southeast Asia, there are many consumers who desire to wash with normal temperature washing water. Therefore, when it is considered to apply the washing machine to the world, it is essential to install a heater and install a so-called cold water (ordinary temperature water) course for washing with ordinary temperature water in the washing machine.

Next, with regard to the cold water (ordinary temperature water) course, the control by which the drum type washing machine ensures stable cleaning performance regardless of the temperature of the washing water will be specifically described.

3A and 3B show a control flowchart of a cold water course, which is an operation course that basically does not use warm water, of the front-loading washing machine according to an embodiment of the present invention, and particularly mainly show a washing process.

As shown in FIG. 3A , first, the user opens the lid body 52 and puts clothes into the rotary drum 43 . Next, the user selects a selection program. In step S1, the control part 82 judges whether the selection course selected by the user is a cold water course. When it is a cold water course (in the case of "Yes" (Y)), it progresses to step S2. When it is a selection program other than a cold water program (in the case of "NO" (N)), the operation|movement of the selection program other than the cooling water program selected by a user is performed. Next, the cloth quantity detection part 85 detects the quantity (cloth quantity) of the laundry thrown in (step S2). In step S3 , control unit 82 displays on display unit 96 the water level corresponding to the amount of cloth and the amount of detergent corresponding to the water level of the water level.

In step S4 , the user injects the displayed amount of detergent into the drawer of detergent storage unit 61 . Thereafter, the first solenoid valve 57 is actuated to supply tap water into the water tank 42 together with the detergent in the detergent container 61 (step S5). In the water supply process of step S5, in order to balance the weight of the laundry in rotary drum 43 and to promote dissolution of the detergent, immersion washing is performed by rotating rotary drum 43 at a low speed (step S6). After soaking and washing, water is supplied so as to raise the water level in water tub 42 that has fallen due to washing water permeating the laundry (step S7). At the same time, the temperature detection unit 73 detects the temperature of the supplied washing water (step S8). This data is stored in the control unit 82 and calculated as shown in FIG. 3B (step S9). Then, when the predetermined amount of water supply is completed, the water supply agitation A is started in step S10.

During the water supply stirring A period, the electric motor 45 rotates the rotary drum 43 at a low speed, thereby performing stirring by hammer washing in which the laundry is lifted up and then dropped by its own weight. In parallel therewith, the circulation pump 67 is alternately driven (ON) and stopped (OFF). Specifically, the circulation pump 67 is driven for one minute, and the washing water in the water tank 42 is sprayed to the laundry in the rotary drum 43 from the spray port 70 at the front of the water tank 42 as circulating water. Thereby, the dissolution of the detergent is further promoted (step S11). Next, the circulation pump 67 is stopped for one minute, and the second electromagnetic valve 58 is opened during the stop of the circulation pump 67 to supply new washing water into the water tank 42 through the water supply path 54 until the predetermined water level is reached (step S12). The reason for stopping the circulation pump 67 during water supply is to accurately detect the water level in the water tank 42 . In step S13 , the control unit 82 determines whether or not a predetermined time has elapsed after the circulation pump 67 is alternately and repeatedly driven for one minute and stopped for one minute. When the predetermined time has elapsed (in the case of "YES"), that is, when the dirt of the laundry has detached to some extent, the water supply agitation A ends. Then, move on to the next step. On the other hand, when it is determined in step S13 that the predetermined time has not passed (in the case of NO), the process returns to step S11, and the water supply and stirring A is continued.

As shown in FIG. 3B , in step S14 , control unit 82 determines whether or not the temperature of the washing water detected in step S8 is a predetermined temperature, for example, 8° C. or lower. When the temperature of the washing water is not lower than the predetermined temperature (in the case of "No"), the total operation time of the water supply stirring B and the water supply stirring C described later is set according to the amount of cloth detected in step S2 (step S2). S15). Specifically, a predetermined temperature and a plurality of temperature ranges of washing water having a temperature higher than the predetermined temperature are determined in advance. For example, a predetermined temperature of 8°C, a temperature range of 8°C<X≦20°C, 20°C<X≦30°C, and 30°C<X (X is the temperature of the washing water) are determined in advance. The total operation time of the water supply agitation B and the water supply agitation C is respectively set for a plurality of temperature ranges of the washing water according to the amount of cloth. Fig. 3B shows the total operation time of water supply agitation B and C when the amount of cloth is large (when it is larger than the standard amount). For example, as shown in FIG. 3B, as the total operation time of water supply stirring B and water supply stirring C, for the range of washing water temperature X 8°C<X≤20°C, a total of 110 minutes is set, and for the range of 20°C<X≤30°C , set a total of 95 minutes, and for the range of 30°C<X, set a total of 80 minutes. The higher the temperature of the washing water, the easier it is to activate the detergent, so the shorter the stirring time is set. Thereby, the front-loading-type washing machine can realize energy saving. In addition, the larger the amount of cloth (the amount of laundry), the longer the time is set to sufficiently wash all the laundry. Thereby, the front-loading-type washing machine can exhibit stable cleaning performance according to the amount of laundry.

During the water supply agitation B in step S16, the motor 45 rotates the rotary drum 43 for four minutes longer than the water supply agitation A, thereby agitating the laundry. In parallel with this, the second solenoid valve 58 is opened to raise the level of the washing water in the water tank 42 that has dropped due to the agitation of the laundry to a predetermined level, and new washing water is supplied into the water tank 42 through the water supply path 54 (step S17). During this water supply period, the circulation pump 67 is stopped.

When the four-minute water supply agitation B of step S16 is completed, it transfers to the water supply agitation C of step S23.

During the water supply agitation C period, the laundry is agitated by rotating the rotary drum 43 for four minutes in the same manner as the water supply agitation B. In parallel with this, the circulation pump 67 is driven, and the washing water in the water tank 42 is sprayed into the rotary drum 43 from the spray port 70 at the front of the water tank 42 as circulating water (step S24). At this time, by the force of the washing water sprayed into the rotary drum 43, the dirt adhering to the laundry floats out, and the molecular movement of the washing water is activated, and the detergent is activated, thereby improving the cleaning ability of the washing water. As a result, unevenness in cleaning of laundry can be reduced. The water supply stirring B for four minutes and the water supply stirring C for four minutes are alternately and repeatedly performed. In step S25, the control unit 82 determines whether the total operation time set in step S15 has elapsed after alternately and repeatedly performing the water supply agitation B and the water supply agitation C. For example, when the temperature of the washing water detected in step S8 is 15° C. and the amount of cloth is large, it is judged whether 110 minutes have passed. That is, the control unit 82 judges whether or not the total operating time determined based on the temperature of the washing water and the amount of cloth has elapsed. When the total operation time has elapsed (in the case of "YES"), the cleaning process ends. On the other hand, when it is judged that the total operation time has not passed yet, it returns to step S16, and water supply stirring B is performed.

On the other hand, when the control unit 82 determines in step S14 that the temperature of the washing water detected in step S8 is equal to or lower than a predetermined temperature (for example, 8°C) (in the case of YES), although it is cold water that does not use warm water, However, in order to prevent the cleaning ability of the washing water from being lowered due to the low temperature, the heater 72 starts to heat the washing water while the water supply agitation B and the water supply agitation C are alternately and repeatedly performed. Wherein, during alternately and repeatedly performing the water supply stirring B and the water supply stirring C, the control unit 82 judges whether the water level of the washing water detected in step S18 meets the requirement for activating the heater 72 (the heater 72 exists in the washing water). ) water level (step S19). When the water level of the washing water is at the predetermined level (in the case of "YES"), the heater 72 is activated to start heating the washing water (step S20). This heating ends (the heater 72 is turned off) when the temperature of the wash water reaches a temperature within the temperature range of the wash water on the lowest temperature side (for example, a temperature in the range of 8° C.<X≦20° C.). In addition, when the temperature of the washing water detected in step S8 is equal to or lower than the predetermined temperature, the water supply agitation B and the water supply agitation C are executed for the total operation time set for the temperature range of the wash water on the lowest temperature side (step S22 ). . In addition, when it is determined in step S19 that the water level of the washing water is not at the predetermined level, the process returns to step S18 to perform detection of the water level.

In the rinsing (1) step following the washing step, the washing water in the water tank 42 is drained by the drain pump 63 . Next, rotary drum 43 is rotated to apply centrifugal force to the laundry, thereby performing intermediate dehydration for separating moisture from the laundry. Next, new washing water is supplied into the water tank 42 through the water supply path 54 until the washing water level is reached. Then, motor 45 rotates rotary drum 43 to start rinsing agitation for detaching the washing liquid from the laundry (step S26).

In the rinsing (2) step, that is, the final rinsing step, draining and intermediate dehydration are performed in the same manner as in rinsing (1), and after the draining and intermediate dehydration are completed, rinsing and agitation are started (step S27 ).

In the dehydration process of step S28 after the rinsing and agitation of step S27 is completed, the washing water in the water tank 42 is drained by the drain pump 63 . Thereafter, rotating drum 43 is rotated at high speed by motor 45 for a predetermined time to apply centrifugal force to the laundry, thereby separating moisture from the laundry. After the specified time has elapsed, the cold water program ends.

As described above, according to the present embodiment, the agitation time is set for each of the plurality of temperature ranges of the washing water based on the detected amount of laundry. When the detected temperature of the washing water is higher than a predetermined temperature, the front-loading washing machine agitates the laundry for an agitation time set for a temperature range including the detected temperature. On the other hand, when the detected temperature is lower than or equal to the predetermined temperature, the front-loading washing machine agitates the laundry for the agitation time set for the temperature range on the lowest temperature side, and heats the washing water with the heater until the washing is completed. The temperature of the water reaches a temperature within the temperature range on the lowest temperature side. The drum type washing machine can achieve stable washing performance according to the temperature of the supplied washing water. When the temperature of the washing water is high, the stirring time can be shortened, so that energy can be saved.

Industrial availability

As described above, according to the present invention, the drum type washing machine sets a stirring time suitable for the temperature of the washing water when the temperature of the washing water is higher than the predetermined temperature, and stirs the laundry with warm water when the temperature is lower than the predetermined temperature. Therefore, the drum type washing machine can exhibit stable cleaning performance and achieve energy saving. Therefore, the present invention can also be applied to other washing machines and the like having a heater.

Claims (3)

1. a tumbling-box washing machine, it possesses:

Swing roller;

Tank, its internal rotating is equiped with above-mentioned swing roller freely;

Motor, it is rotated driving to above-mentioned swing roller;

Water unit, it provides washings in above-mentioned tank;

Cloth amount test section, it detects the amount of putting into the washings in above-mentioned swing roller;

Circulating pump, it makes the washings in above-mentioned tank be ejected in above-mentioned swing roller via water circulation path;

Heater, heated scrub water is carried out in its bottom that is provided in above-mentioned tank;

Temperature detecting part, its temperature to the washings in above-mentioned tank detects; And

Control part, it is controlled above-mentioned motor, above-mentioned water unit, above-mentioned circulating pump and above-mentioned heater, carries out matting, rinsing process and dehydration procedure,

Wherein, the amount of the washings that above-mentioned control part basis is detected by above-mentioned cloth amount test section, the mixing time of the washings while setting matting for temperature respectively higher than multiple temperature ranges of the washings of the high temperature side of set point of temperature,

In the detected temperatures of said temperature test section, higher than at afore mentioned rules temperature, the mixing time of setting with the temperature range for comprising this detected temperatures is carried out the stirring of washings,

In the detected temperatures of said temperature test section less than or equal at afore mentioned rules temperature, the mixing time of setting with temperature range for lowest temperature side is carried out the stirring of washings, and by above-mentioned heater, washings is heated until the temperature of washings reaches the temperature in the temperature range of lowest temperature side.

2. tumbling-box washing machine according to claim 1, is characterized in that,

About the mixing time of setting respectively for temperature range, temperature range is high temperature, and the mixing time of setting is shorter.

3. tumbling-box washing machine according to claim 1 and 2, is characterized in that,

About the mixing time of setting respectively for temperature range, the amount of washings is more, and the mixing time of setting is longer.