JP6178977B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine for washing laundry such as clothes.

  Conventionally, in this type of washing machine, a filter device that removes foreign matters such as lint contained in the washing water is provided in the drainage passage, and a filter can be detachably provided to remove the collected foreign matters. ing. And it is considered that drainage is prevented from leaking outside the apparatus during maintenance of the filter device (for example, see Patent Document 1).

  FIG. 8 shows a conventional washing machine described in Patent Document 1. In FIG. In FIG. 8, a drainage path 3 for discharging water in a water tank 2 that rotatably supports the drum 1, and detachably disposed in the middle of the drainage path 3, collects foreign matters such as lint contained in drainage. A filter device 4, a drainage introduction path 5 that is provided in the middle of the drainage path 3 and guides part of the drainage, a residual water detection means 6 that includes a float that detects the water level in the drainage introduction path 5, A filter device 7 that includes a lock device 7 that regulates the removal of the filter device 4 in conjunction with the water detection means 6 and that detects the residual water and regulates the removal of the filter device 4 to thereby filter when there is residual water. The water leakage due to the removal of the device 4 is prevented.

  The operating body is made of a shape memory alloy whose shape changes with the temperature change of the fluid, and the valve body is brought into contact with and separated from the valve seat by the shape change of the operating body due to the temperature change of the fluid. A valve has been considered (see, for example, Patent Document 2).

JP 2010-136740 A Japanese Utility Model Publication No. 56-113274

  However, in the conventional configuration, since the residual water detecting means is configured by a float provided in the drainage introduction path, there is a problem that the float is contaminated by dust or lint in the drainage, resulting in malfunction. Further, since the lock device that restricts the removal of the filter device is configured to be electrically driven, there has been a problem that it does not operate when the power supply is shut off. In general, the maintenance work of the filter device is often performed after the washing is finished, the washing machine is in a stopped state, and when the control means for driving the lock device is inactive, the filter device There was a problem that it was not possible to prevent water leakage due to removal.

  An object of the present invention is to solve the above-described conventional problems, and to provide a washing machine capable of preventing leakage of hot water from a filter even in a state where the energization of the washing machine is interrupted. To do.

In order to solve the above-described conventional problems, a washing machine of the present invention includes an outer tub that is swingably supported in a washing machine body, a washing and dewatering tub that is rotatably disposed in the outer tub, a water supply means for supplying washing water to the outer tub, a heating means for heating the washing water, a drainage means for draining the washing water, a drainage path communicating said drainage means and the bottom of the outer tub, before Symbol drainage path And a filter means for removing foreign matter in the washing water, wherein the filter means is connected to the drainage path, a filter that is detachably attached to the filter case, and a state in which the filter is attached And a lock means that absorbs heat from the washing water , a lock operation part that is supported by one end of the temperature sensitive part and is made of bimetal, and a tip of the lock operation part. Shape And a lock portion for preventing the filter from being detached, and the lock operation portion is thermally deformed by transmitting heat absorbed by the temperature sensing portion to the lock operation portion, and the temperature of the washing water is predetermined. When the temperature is higher than the temperature, the filter is held .

  As a result, during or after washing, when washing water or residual water is present in the outer tub or drainage path and is higher than the specified temperature, the lock means will not operate and the filter cannot be removed even when power is cut off. It becomes possible to prevent leakage of hot water and improve safety.

  In the washing machine of the present invention, when washing water or residual water is present in the outer tub or drainage path and is higher than a predetermined temperature, it is possible to prevent the filter from being removed even when power is cut off. Can be prevented and safety can be improved.

Sectional drawing of the principal part of the washing machine in Embodiment 1 of this invention Sectional drawing of the principal part of the washing machine in Embodiment 2 of this invention Sectional drawing of the principal part of the washing machine in Embodiment 3 of this invention Sectional drawing of the principal part of the washing machine in Embodiment 4 of this invention Sectional drawing of the principal part of the washing machine in Embodiment 5 of this invention Sectional drawing of the principal part at the time of the lock | rock of the filter means of the washing machine in Embodiment 6 of this invention Cross-sectional view of main parts when the filter means of the washing machine is unlocked Sectional drawing of the principal part of the washing machine in Embodiment 7 of this invention Cross section of the main part of a conventional washing machine

The first invention includes an outer tub that is swingably supported in the washing machine body, a washing and dewatering tub that is rotatably disposed in the outer tub, and a water supply means that supplies washing water to the outer tub. A heating means for heating the washing water; a draining means for draining the washing water; a drainage path communicating with the bottom of the outer tub and the drainage means; and a filter means provided in the drainage path for removing foreign matter in the washing water. The filter means includes a filter case that is connected to the drainage path, a filter that is detachably mounted in the filter case, and a lock means that holds the filter in a mounted state. The means includes a temperature sensing part that absorbs heat from the washing water, and one end of the temperature sensing part.
And a lock operating part made of bimetal, and a lock part formed at the tip of the lock operating part to prevent the filter from being detached, and transfers heat absorbed by the temperature sensing part to the lock operating part. Thus, the lock operation unit is configured to be thermally deformed, and when the temperature of the washing water is higher than a predetermined temperature, the filter is attached. If water is present in the outer tub or drainage path and is higher than the specified temperature, the lock can be activated to prevent the filter from being removed even when power is cut off, preventing hot water from leaking. Thus, safety at the time of maintenance inspection and maintenance can be improved.

In particular, according to the second invention, in the first invention , by providing the temperature sensing portion in the drainage channel, even if there is a small amount of residual water in the drainage channel where residual water tends to accumulate, the temperature is surely maintained. The lock portion can be operated by detecting the above, and the reliability of the lock means can be improved.

According to a third aspect of the invention, in particular, in the first aspect of the invention , by providing the temperature sensing part in the filter case, the lock part can be operated by sensing the temperature of the residual water that leaks first, The reliability of the means can be improved.

According to a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention , the lock means is provided in the filter so that it can be disposed in the remaining water in the filter case serving as a water leak port. Thus, the sensitivity of the temperature sensing part can be increased and the locking part can be operated quickly, and the reliability of the locking means can be improved.

According to a fifth aspect of the present invention, there is provided an outer tub that is swingably supported in the washing machine body, a washing and dewatering tub that is rotatably disposed in the outer tub, and a water supply means that supplies washing water to the outer tub. A heating means for heating the washing water; a draining means for draining the washing water; a drainage path communicating with the bottom of the outer tub and the drainage means; and a filter means provided in the drainage path for removing foreign matter in the washing water. The filter means includes a filter case that is connected to the drainage path, a filter that is detachably mounted in the filter case, and a lock means that holds the filter in a mounted state. The means includes a temperature sensing part made of a coil-shaped shape memory alloy that expands and contracts depending on the temperature of the washing water, a lock operation part that moves forward and backward by extension and contraction of the temperature sensing part,
And a lock portion that is connected to the lock operation portion to prevent the filter from being detached, and when the temperature of the washing water is higher than a predetermined temperature, the filter is kept in a mounted state, so that the temperature is surely higher than the set temperature. In addition, the lock operation portion can be extended, so that the reliability of the lock means can be improved and the configuration can be simplified.

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 cross-sectional view of a main part of the washing machine according to the first embodiment of the present invention. In FIG. 1, an outer tub 33 is elastically supported by an elastic body 31 and a damping device 32 in a washing machine body 30 so as to be swingable. The washing / dehydrating tub 34 is rotatably disposed in the outer tub 33. The motor (driving means) 35 is composed of a brushless DC motor, and is capable of freely changing the rotation speed by inverter control.

  The motor 35 is attached to the rear surface side of the outer bottom portion of the outer tub 33. The power of the motor 35 is supplied to the washing / dehydrating tub 34 via a motor pulley 35a attached to the rotating shaft of the motor 35 and a drive belt 35b installed on the washing / dehydrating tub pulley 34a attached to the rotating shaft of the washing / dehydrating tub 34. It is transmitted and rotated.

A water supply valve (water supply means) 36 is connected to a water tap or the like, and supplies washing water to the outer tub 33 and the detergent supply means 37. The water supply valve (water supply means) 36 directly supplies water into the outer tub 33 and the detergent supply means 37. This is an electromagnetic two-way valve that switches to indirect water supply. The water level detection means 38 detects the water level of the washing water in the outer tub 33. The drain valve (drainage means) 39 drains the washing water in the outer tub 33 to the outside of the machine.

  The control means 40 is disposed in the upper part of the washing machine body 30 and is washed based on the setting content input by an operation display unit (not shown) provided on the front upper part of the washing machine body 30. Each process of rinsing and dehydration is sequentially controlled, and the motor 35, the water supply valve 36, the drain valve 39, and the like are sequentially controlled via power switching means (not shown).

  The damping device 32 is a viscous damper that uses oil as a working fluid, and reduces the resonance vibration amplitude of the outer tub 33 at the time of dehydration activation. Between the bottom 30 a of the washing machine body 30 and the bottom 33 a of the outer tub 33. It is fixed. The legs 41 are made of an elastic body such as rubber and are disposed at the four corners of the bottom 30 a of the washing machine body 30.

  As the heating means 42, a sheathed heater that can be used in water is used, and is arranged at the bottom in the outer tub 33 by being bent in a substantially U shape. The washing water in the outer tub 33 is heated to a temperature suitable for washing (for example, 40 ° C.) based on the set temperature set by the operation display unit, and is also suitable for sterilization (for example, 70 ° C.). ). The temperature of the washing water is detected by a temperature detection means 43 such as a thermistor provided at the bottom 33a of the outer tub 33, and the heating means 42 is controlled by inputting an output signal of the temperature detection means 43 to the control means 40. .

  A drainage path 44 that connects the bottom 33 a of the outer tub 33 and the drain valve 39 is provided, and is disposed below the outer tub 33. The drainage path 44 is provided with filter means 45 for removing foreign matters in the drained washing water.

  The filter means 45 includes a filter case 46 connected in communication with the drainage passage 44, a filter 47 that is detachably mounted in the filter case 46, a filter knob 47a that holds the filter 47 when the filter 47 is mounted and removed, and a filter It is comprised with the locking means 48 which hold | maintains 47 to a mounting state.

  The electrode sensor 80 is provided on the downstream side in the drainage path 44 and detects the presence or absence of a conductive liquid (for example, drainage) flowing in the drainage path 44. In this embodiment, it is provided in the vicinity of the filter 47 in the downstream basin, but it may be provided anywhere in the drainage path as long as the conductive liquid in the drainage path can be detected.

  The lock means 48 includes an electrode sensor 80, and a lock portion 51 that is supported at one end by a lock operation portion 50 made of bimetal and bent at the tip of the lock operation portion 50 toward the filter knob 47a. When the electrode sensor 80 detects a predetermined conductive liquid (the lock operation unit 50 is deformed, the lock unit 48 is activated.

  The electrode sensor 80 absorbs heat from the washing water staying in the drainage passage 44 and supports the lock operation unit 50 made of bimetal, and also functions to transmit heat. The lock portion 51 is configured to be moved by thermal deformation of the lock operation portion 50 and to be inserted into a lock hole 52 provided in the filter knob 47a. The lock hole 52 is provided at a position facing the tip portion of the lock portion 51.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, the door 30b that opens and closes the opening 33b provided on the front side of the outer tub 33 is opened, and the laundry is put into the washing and dehydrating tub 34 from the input port 34b that opens on the front side of the washing and dehydrating tub 34, After putting the detergent into the detergent supply means 37, the operation display unit is operated to start operation.

  Thereby, the control means 40 sets the water supply valve 36 to the detergent supply means 37 side, and starts water supply into the outer tub 33. At this time, the supplied washing water flows into the gap formed by the outer tub 33 and the washing and dehydrating tub 34, and the laundry does not directly absorb water, so that it is possible to prevent the temperature of the laundry from being lowered due to water absorption. it can.

  When the amount of laundry put in is detected by a cloth amount detection means (not shown), and the water level detection means 38 detects that a predetermined amount of water set in advance according to the amount of laundry is supplied, The control means 40 repeats normal rotation and reversal at a rotation speed (for example, 45 r / min) at which the washing / dehydrating tub 34 can be washed, and lifts the laundry in the rotating direction so that the inside of the washing / dehydrating tub 34 is The so-called scouring is performed by dropping from the top of the slab. When performing sterilization washing, the washing water collected in the bottom 33a of the outer tub 33 is heated by the heating means 42 until the temperature detection means 43 detects, for example, 70 ° C.

  After the washing is finished, the drain valve 39 is operated and the washing water is drained. When the temperature of the washing water is heated to, for example, 70 ° C. by the setting of the sterilization washing, if the high temperature washing water stays in the drainage path 44 without being completely drained, the electrode sensor 80 is used. The lock operation part 50 is heated and thermally deformed, and the lock part 51 moves in the direction of the lock hole 52.

When the lock portion 51 is inserted into the lock hole 52, the rotation of the filter knob 47a is hindered, and the filter 47 cannot be removed from the filter case 46. When time passes and the temperature of the accumulated washing water decreases and the shape of the lock operation part 50 is restored, the lock part 51 comes out of the lock hole 52 and the filter knob 47a can be rotated, and the filter 47 is removed. Will be able to. Therefore, the filter 47 can be safely removed without leaking hot washing water.
(Embodiment 2)
FIG. 2 is a cross-sectional view of a main part of the washing machine according to the second embodiment of the present invention. In FIG. 2, an outer tub 33 is elastically supported by an elastic body 31 and a damping device 32 in a washing machine body 30 so as to be swingable. The washing / dehydrating tub 34 is rotatably disposed in the outer tub 33. The motor (driving means) 35 is composed of a brushless DC motor, and is capable of freely changing the rotation speed by inverter control.

  The motor 35 is attached to the rear surface side of the outer bottom portion of the outer tub 33. The power of the motor 35 is supplied to the washing / dehydrating tub 34 via a motor pulley 35a attached to the rotating shaft of the motor 35 and a drive belt 35b installed on the washing / dehydrating tub pulley 34a attached to the rotating shaft of the washing / dehydrating tub 34. It is transmitted and rotated.

  A water supply valve (water supply means) 36 is connected to a water tap or the like, and supplies washing water to the outer tub 33 and the detergent supply means 37. This is an electromagnetic two-way valve that switches to indirect water supply. The water level detection means 38 detects the water level of the washing water in the outer tub 33. The drain valve (drainage means) 39 drains the washing water in the outer tub 33 to the outside of the machine.

  The control means 40 is disposed in the upper part of the washing machine body 30 and is washed based on the setting content input by an operation display unit (not shown) provided on the front upper part of the washing machine body 30. Each process of rinsing and dehydration is sequentially controlled, and the motor 35, the water supply valve 36, the drain valve 39, and the like are sequentially controlled via power switching means (not shown).

The damping device 32 is a viscous damper that uses oil as a working fluid, and reduces the resonance vibration amplitude of the outer tub 33 at the time of dehydration activation. The damping device 32 has a bottom 30 a of the washing machine body 30 and a bottom 33 a of the outer tub 33.
It is fixed between. The legs 41 are made of an elastic body such as rubber and are disposed at the four corners of the bottom 30 a of the washing machine body 30.

  As the heating means 42, a sheathed heater that can be used in water is used, and is arranged at the bottom in the outer tub 33 by being bent in a substantially U shape. The washing water in the outer tub 33 is heated to a temperature suitable for washing (for example, 40 ° C.) based on the set temperature set by the operation display unit, and is also suitable for sterilization (for example, 70 ° C.). ). The temperature of the washing water is detected by a temperature detection means 43 such as a thermistor provided at the bottom 33a of the outer tub 33, and the heating means 42 is controlled by inputting an output signal of the temperature detection means 43 to the control means 40. .

  A drainage path 44 that connects the bottom 33 a of the outer tub 33 and the drain valve 39 is provided, and is disposed below the outer tub 33. The drainage path 44 is provided with filter means 45 for removing foreign matters in the drained washing water.

  The filter means 45 includes a filter case 46 connected in communication with the drainage passage 44, a filter 47 that is detachably mounted in the filter case 46, a filter knob 47a that holds the filter 47 when the filter 47 is mounted and removed, and a filter It is comprised with the locking means 48 which hold | maintains 47 to a mounting state.

  The lock means 48 includes a temperature sensing portion 49 that is thermally coupled to the drainage passage 44, a lock operation portion 50 that is supported by one end of the temperature sensing portion 49 and made of bimetal, and a filter knob 47a at the tip of the lock operation portion 50. When the temperature sensing unit 49 senses a temperature higher than a predetermined temperature (for example, 70 ° C.), the lock operation unit 50 is thermally deformed and the lock unit 48 is Operate.

  The temperature sensing portion 49 absorbs heat from the washing water staying in the drainage passage 44 and supports the lock operation portion 50 made of bimetal, and functions to transmit heat. The lock portion 51 is configured to be moved by thermal deformation of the lock operation portion 50 and to be inserted into a lock hole 52 provided in the filter knob 47a. The lock hole 52 is provided at a position facing the tip portion of the lock portion 51.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, the door 30b that opens and closes the opening 33b provided on the front side of the outer tub 33 is opened, and the laundry is put into the washing and dehydrating tub 34 from the input port 34b that opens on the front side of the washing and dehydrating tub 34, After putting the detergent into the detergent supply means 37, the operation display unit is operated to start operation.

  Thereby, the control means 40 sets the water supply valve 36 to the detergent supply means 37 side, and starts water supply into the outer tub 33. At this time, the supplied washing water flows into the gap formed by the outer tub 33 and the washing and dehydrating tub 34, and the laundry does not directly absorb water, so that it is possible to prevent the temperature of the laundry from being lowered due to water absorption. it can.

  When the amount of laundry put in is detected by a cloth amount detection means (not shown), and the water level detection means 38 detects that a predetermined amount of water set in advance according to the amount of laundry is supplied, The control means 40 repeats normal rotation and reversal at a rotation speed (for example, 45 r / min) at which the washing / dehydrating tub 34 can be washed, and lifts the laundry in the rotating direction so that the inside of the washing / dehydrating tub 34 is The so-called scouring is performed by dropping from the top of the slab. When performing sterilization washing, the washing water collected in the bottom 33a of the outer tub 33 is heated by the heating means 42 until the temperature detection means 43 detects, for example, 70 ° C.

After the washing is finished, the drain valve 39 is operated and the washing water is drained. When the temperature of the washing water is heated to, for example, 70 ° C. by the setting of the sterilization washing, if the high temperature washing water stays in the drainage passage 44 without being completely drained, the temperature sensing unit 49 is used. Then, the lock operation unit 50 is heated and thermally deformed, and the lock unit 51 moves in the direction of the lock hole 52.

  When the lock portion 51 is inserted into the lock hole 52, the rotation of the filter knob 47a is hindered, and the filter 47 cannot be removed from the filter case 46. When time passes and the temperature of the accumulated washing water decreases and the shape of the lock operation part 50 is restored, the lock part 51 comes out of the lock hole 52 and the filter knob 47a can be rotated, and the filter 47 is removed. Will be able to. Therefore, the filter 47 can be safely removed without leaking hot washing water.

  As described above, in the present embodiment, the outer tub 33 that is swingably supported in the washing machine body 30, the washing / dehydration tub 34 that is rotatably disposed in the outer tub 33, and the outer tub 33. Water supply means 36 for supplying washing water, heating means 42 for heating the washing water, drainage means 39 for draining the wash water, drainage passage 44 for communicating the bottom 33a of the outer tub 33 and the drainage means 39, drainage The filter means 45 is provided in the path 44 and removes foreign matters in the washing water. The filter means 45 includes a filter case 46 connected to the drain path 44, a filter 47 that is detachably mounted in the filter case 46, and a filter. Lock means 48 that holds the state in which 47 is attached, and the lock means 48 is configured to lock when the temperature of the washing water is higher than a predetermined temperature. In addition, when washing water or residual water exists in the outer tub 33 or the drainage passage 44 and is higher than a predetermined temperature, the lock means 48 may be activated to prevent the filter 47 from being removed even when the energization is interrupted. It becomes possible to prevent leakage of warm water and improve safety.

(Embodiment 3)
FIG. 3 is a cross-sectional view of a main part of the washing machine according to the third embodiment of the present invention. A feature of this embodiment is that a temperature sensing portion 49 of the lock means 48 is provided in the drainage passage 44 so as to sense the temperature of the washing water. Other configurations are the same as those of the second embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  In FIG. 3, the lock means 48 includes a lock unit 51 that prevents the filter 47 from being detached from the filter case 46, a temperature sensing unit 49 that senses the temperature of the washing water, and a temperature sensed by the temperature sensing unit 49. A lock operation unit 50 for driving the lock unit 51 is provided. The temperature sensing part 49 is provided in the drainage passage 44 on the outflow side of the filter case 46.

  According to the present embodiment, the drainage path 44 extending from the bottom 33a of the outer tub 33 to the filter means 45 is disposed below the bottom 33a of the outer tub 33 so that residual water is easily collected. Even if the amount of water is small, the temperature of the lock unit 51 can be actuated by reliably sensing the temperature, so that the reliability of the lock means 48 can be improved.

(Embodiment 4)
FIG. 4 is a cross-sectional view of a main part of a washing machine according to the fourth embodiment of the present invention. The feature of this embodiment is that a temperature sensing part 49 of the lock means 48 is provided in the filter case 46 so as to sense the temperature of the washing water. Other configurations are the same as those of the second embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  In FIG. 4, the lock means 48 corresponds to the lock portion 51 that prevents the filter 47 from being detached from the filter case 46, the temperature sensing portion 49 that senses the temperature of the washing water, and the temperature sensed by the temperature sensing portion 49. A lock operation unit 50 for driving the lock unit 51 is provided. The temperature sensing part 49 is provided at the lower part of the outer surface of the filter case 46.

  According to the present embodiment, by providing the temperature sensing part 49 in the filter case 46 serving as a residual water leakage port, the lock part 51 can be activated by sensing the temperature of the residual water leaking first, The reliability of the lock means 48 can be further improved.

(Embodiment 5)
FIG. 5 is a cross-sectional view of a main part of a washing machine according to a fifth embodiment of the present invention. A feature of the present embodiment is that a lock means 48 is provided in the filter 47 so as to sense the temperature of the washing water. Other configurations are the same as those of the second embodiment, the same reference numerals are given to the same configurations, and the detailed description of the second embodiment is used.

  In FIG. 5, the lock means 48 includes a lock unit 51 that prevents the filter 47 from being detached from the filter case 46, a temperature sensing unit 49 that senses the temperature of the washing water, and a temperature sensed by the temperature sensing unit 49. A lock operation unit 50 for driving the lock unit 51 is provided. The lock means 48 is provided in the filter 47.

  According to the present embodiment, the lock means 48 is provided in the filter 47 that is inserted into the remaining water in the filter case 46 that serves as a water leak port, and the sensitivity of the temperature sensing portion 49 is increased to quickly move the lock portion 51. The reliability of the lock means 48 can be further improved.

(Embodiment 6)
FIG. 6 is a cross-sectional view of the main part of the filter means of the washing machine according to the sixth embodiment of the present invention, showing the locked state by the lock means. FIG. 7 shows the unlocked state of the locking means. A feature of the present embodiment is that the temperature sensing portion 49 of the lock means 48 is made of a coiled shape memory alloy. Other configurations are the same as those of the second embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  6 and 7, the temperature sensing part 49 of the locking means 48 is made of a shape memory alloy formed in a coil shape. The compression spring 53 formed in a coil shape urges the coil-shaped temperature sensing portion 49 to return to the original state when the temperature sensing portion 49 becomes a set temperature or lower. The link mechanism 54 is connected to one end of the lock operation unit 50, and is configured such that the lock unit 51 protrudes and retracts from the side of the filter knob 47 a when the lock operation unit 50 moves back and forth due to expansion and contraction of the temperature sensing unit 49. ing.

  The filter case 46 is provided with a lock hole 52 into which the tip of the lock part 51 is inserted at a position facing the lock part 51. The lock operation unit 50 is provided so as to be able to advance and retract by a temperature sensing unit 49 and a compression spring 53, and is configured to be slidable in the filter 47. The temperature sensing portion 49 and the compression spring 53 made of a coiled shape memory alloy are housed in the tubular portion 49a so that foreign matter such as lint collected by the filter 47 does not adhere and accumulate. .

  When the heat of the hot water is transmitted to the temperature sensing part 49 and becomes a predetermined temperature (for example, 70 ° C.) or more, the compression spring 53 is compressed by the restoring force of the temperature sensing part 49 and the lock operating part 50 moves in the extending direction. The portion 51 protrudes from the side of the filter knob 47a and is inserted into the lock hole 52. The rotation of the filter knob 47a is restricted, and the filter 47 is held in the mounted state.

When the temperature of the temperature sensing part 49 falls below a predetermined temperature (for example, 70 ° C.), the restoring force is lost, the repulsive force of the compression spring 53 moves in the direction in which the lock operating part 50 contracts, and the lock part 51 is locked. Leave. The lock 51 is housed inward from the side of the filter knob 47a, and the filter knob 47a can be rotated. Therefore, the filter 47 can be removed from the filter case 46 together with the lock means 48.

  According to the present embodiment, when the temperature sensing part 49 reaches the set temperature, it is composed of a coiled shape memory alloy that restores to its original shape, and the lock operation part 50 is reliably operated above the set temperature. Thus, the reliability of the lock means 48 can be improved and the configuration can be simplified.

(Embodiment 7)
FIG. 8: is principal part sectional drawing of the washing machine of the 7th Embodiment of this invention. The feature of the present embodiment is that the locking means 48 is constituted by a liquid expansion working body 55 having a temperature sensing part 49, and the temperature sensing part 49 is provided in the outer tub 33 near the heating means 42. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the second embodiment is used.

  In FIG. 8, the locking means 48 is constituted by an operating body 55 by liquid expansion having a temperature sensing part 49. The temperature sensing part 49 is provided at the bottom 33 a of the outer tub 33 in the vicinity of the heating means 42 disposed at the bottom of the outer tub 33.

  According to the present embodiment, the temperature of the washing water can be sensed at a position away from the filter 47, the temperature in the outer tub 33 having the highest residual water temperature is sensed, and the lock unit 51 is sensed. Can be operated, and leakage of warm water can be prevented to improve safety.

  As described above, the washing machine according to the present invention makes it impossible to remove the filter even when the energization is interrupted when the washing water or the remaining water is present in the outer tub or the circulation path and is higher than the predetermined temperature. Therefore, it is possible to prevent leakage of hot water and improve safety, which is useful as a washing machine.

30 Washing machine body 33 Outer tub 33a Bottom 34 Washing / dehydration tub 36 Water supply valve (water supply means)
39 Drain valve (drainage means)
42 Heating means 44 Drainage path 45 Filter means 46 Filter case 47 Filter 48 Lock means

Claims (5)

An outer tub swingably supported in the washing machine body,
A washing and dewatering tank rotatably disposed in the outer tub;
Water supply means for supplying washing water to the outer tub;
Heating means for heating the washing water;
Drainage means for draining the wash water;
A drainage path communicating the bottom of the outer tub and the drainage means;
Filter means provided in the drainage path to remove foreign matter in the wash water,
The filter means includes
A filter case in communication with the drainage path;
A filter that is detachably mounted in the filter case;
Locking means for holding the filter in a mounted state,
The locking means is
A temperature sensing part that absorbs heat from the washing water, a lock operation part that is formed of a bimetal with one end supported by the temperature sensing part, and a lock part that is formed at the tip of the lock operation part to prevent the filter from being detached. The lock operation unit is configured to be thermally deformed by transmitting heat absorbed by the temperature sensing unit to the lock operation unit, and the filter is mounted when the temperature of the washing water is higher than a predetermined temperature. Like a washing machine. Washing machine according to claim 1, wherein providing the pre-Symbol temperature sensing portion to said drainage path. Washing machine according to claim 1, wherein providing the pre-Symbol temperature sensing unit in the filter case. Washing machine according to any one of the previous SL locking means from claim 1 provided in the filter 3. An outer tub swingably supported in the washing machine body,
A washing and dewatering tank rotatably disposed in the outer tub;
Water supply means for supplying washing water to the outer tub;
Heating means for heating the washing water;
Drainage means for draining the wash water;
A drainage path communicating the bottom of the outer tub and the drainage means;
Filter means provided in the drainage path to remove foreign matter in the wash water,
The filter means includes a filter case connected in communication with the drainage path;
A filter that is detachably mounted in the filter case;
Locking means for holding the filter in a mounted state,
The locking means is
A temperature sensing portion made of a coil-shaped shape memory alloy that expands and contracts depending on the temperature of the washing water, a lock operation portion that moves forward and backward by the expansion and contraction of the temperature sensing portion, and is connected to the lock operation portion to prevent the filter from being detached. A washing machine comprising: a lock portion, wherein the filter is held when the temperature of the washing water is higher than a predetermined temperature .

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