JP4220414B2 - Household appliances - Google Patents

Description

  The present invention relates to household electric appliances such as a dehumidifier, a humidifier, an air cleaner, and a dishwasher.

  This type of household electric appliance includes a load component including a heat generating component such as a motor or a heating component such as a heater inside the exterior body, and a microcomputer that controls the load component and executes a predetermined operation. Yes. And the function which detects a predetermined | prescribed operation state with detection means, such as a switch or a sensor, and notifies a user with the display means or an alerting | reporting means is mounted.

  For example, the dehumidifier includes a tank for storing dehumidified water, detects a full water state of the tank by a switch using a float, and informs the user of the full water state of the tank by a display means disposed on the exterior body. ing. The humidifier also includes a tank that stores water for humidification, detects a state in which the water in the tank is exhausted by a switch using a float, and indicates the water supply state of the tank by a display means disposed on the exterior body. It informs the user. In addition, the air purifier includes a filter for purifying the air to be circulated, the clogged state of the filter is detected by a sensor for detecting the air flow rate, etc., and the cleaning time of the filter is determined by a display means disposed on the exterior body. It informs the user. In addition, the dishwasher detects whether water from the water supply is supplied by a flow sensor, detects whether high-temperature water is supplied by a temperature sensor, and does not supply water. When the water is supplied, the state is notified to the user by the notification means.

  On the other hand, household electric appliances equipped with heating parts such as motors or heating parts such as heaters cannot perform normal operations set in advance due to any load component failing for some reason, In order to prevent the heat generating component or the vicinity of the heating component from becoming abnormally high temperature, a safety device is mounted. As this safety device, temperature sensitive means such as a thermal fuse is used. The thermal fuse is disposed in the vicinity of the heat generating component or the heating component, and is electrically connected between the commercial power source and the power supply circuit. When the temperature is increased to a preset temperature, The power supply from the power supply is cut off, and the operation of all the load parts is completely stopped.

  In this case, the user does not perform any operation even though the power cord is connected to the commercial power supply. There is a problem that it is impossible to understand whether it has occurred, and it causes distrust.

  Such prior art document information of household electrical appliances that inform the user of the stoppage of the device by the safety device includes the following.

Japanese Patent No. 3444260

  This Patent Document 1 describes a rice cooker that is one of household electric appliances. This rice cooker is equipped with a safety device using the temperature fuse. Moreover, the rice cooker enables the microcomputer to determine the connection state with the commercial power supply based on the presence or absence of the zero cross signal. Furthermore, this rice cooker is equipped with a backup power supply, and when power supply from the commercial power supply is stopped, failure diagnosis means at the time of power supply stop is arranged to judge whether or not the thermal fuse is blown by power supply from the backup power supply. Yes. Then, when it is determined that the thermal fuse is blown in the state of connection with the commercial power supply, the failure display means displays that the thermal fuse is blown.

  However, the configuration described in Patent Document 1 requires a zero-cross circuit that detects a connection state with a commercial power supply, a backup power supply, and a failure diagnosis unit, and thus has a problem of high cost.

  Therefore, an object of the present invention is to provide a household electrical product that can inform the user of the operating state of the safety device at low cost.

In order to solve the above-mentioned problems, the household electrical appliance according to the present invention has a load component including a heat generating component such as a motor or a heating component such as a heater inside the exterior body, and controls the load component to perform a predetermined operation. A household electric product having a function of detecting a predetermined operation state by a detection unit such as a switch or a sensor and notifying a user by a display unit or a notification unit, in series with the detection unit and the microcomputer Temperature sensitive means that is electrically connected to and changes the energization state in response to temperature is disposed in the exterior body, and an abnormal temperature rise state in the exterior body is determined based on the energization state by the temperature sensitive means in the operating state. Is notified to the user by the same display means or notification means.

  Here, as the “temperature sensitive means that changes the energization state in response to temperature”, a temperature fuse and a thermostat that cut off the energization, a thermistor that changes the energization amount by changing the resistance value, and the like can be used. The thermostat includes both a manual return type and an automatic return type.

  In this household electric product, it is preferable that the temperature sensitive means is disposed in the vicinity of the heat generating component or the heating component.

  Moreover, it is preferable that the microcomputer further stops the predetermined operation by the load component when the detection unit detects a predetermined operation state.

  In the household electrical product of the present invention, the temperature sensitive means constituting the safety device is arranged in the exterior body, and the temperature sensitive means is electrically connected in series with the detecting means and the microcomputer. Based on the state, the abnormal temperature rising state in the exterior body can be notified to the user by the existing display means or notification means. In other words, it can be implemented at low cost simply by changing the circuit configuration for electrically connecting the temperature sensitive means.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a household electrical appliance safety device according to an embodiment of the present invention, and FIG. 2 shows a household electrical appliance dehumidifier equipped with the safety device. First, a specific configuration of the dehumidifier will be described.

  As shown in FIG. 2, the dehumidifier includes a plurality of load components including motors 29, 35A, 35B, and 38 that are heat generating components and a heater 39 that is a heating component inside the exterior body 10, and these load components. And a microcomputer 65 for performing the dehumidifying operation. Further, the function of detecting the full state of the tank 52 by the second micro switch 57 serving as a detection means and notifying the user by the display means (fourth LED 63), and preventing the inside of the exterior body 10 from continuously operating in an abnormally heated state. It is equipped with a safety function.

  Specifically, the dehumidifier divides the interior of the outer casing 10 having a substantially rectangular shape into a dehumidifying passage 11 indicated by a solid line arrow and a regeneration passage 12 indicated by a broken line arrow, and inside the dehumidifying rotor 28, The indoor air circulation fans 34A and 34B, the regenerative air circulation fan 37, the heater 39, and the heat exchanger 42 are horizontally disposed, and a tank 52 is disposed in the lower part.

  As shown in FIGS. 3A and 3B, the exterior body 10 has a front cover 14 and a rear cover 15 disposed before and after a base frame 13. An exhaust port 17 having a louver 16 is formed in the upper portion of the front cover 14. The rear cover 15 is formed with an intake port 18 composed of a plurality of slits extending in the vertical direction. Further, by attaching covers 14 and 15 to the base frame 13 in the exterior body 10, a tank housing chamber 19 is formed in the lower part thereof.

  On the front side of the base frame 13, as shown in FIG. 4, indoor air circulation fan arrangement portions 20A and 20B having walls constituting a pair of involute passages, a regenerative air circulation fan arrangement portion 21, A duct portion 22 extending from the regenerative air circulation fan disposing portion 21 to the heater disposing portion 24 is provided. The duct portion 22 is formed of a groove having a concave cross section, and constitutes a part of the regeneration passage 12 by disposing a duct cover 23 having a reverse concave shape fitted into the groove. In addition, on the upper surface of the duct cover 23 of the present embodiment, a wall that constitutes a part of the involute passage of the indoor air circulation fan arrangement portion 20A is provided upright.

  Further, as shown in FIGS. 5 and 6, on the rear surface side of the base frame 13, a cylinder communicating with the heater heater 24, the dehumidifying rotor distributor 25, and the regenerative air circulation fan distributor 21. A duct 26 is provided. The heater arrangement portion 24 communicates with the duct portion 22. The dehumidifying rotor arrangement portion 25 is provided with a guide groove on the upper surface of the peripheral wall 27 that is thicker than the lower end edge of the holding member 31 of the dehumidifying rotor 28 described later.

  The regeneration passage 12 corresponds to the regeneration air circulation fan disposition portion 21, the duct portion 22 communicating with the disposition portion, the heater disposition portion 24 communicating with the duct portion 22, and the disposition portion 24. Thus, the rotor cover 50 disposed on the opposite side of the dehumidifying rotor 28 and the heat exchanger 42 connected to the rotor cover 50 and connected to the regenerative air circulation fan disposing portion 21 are configured. The inside of the exterior body 10 excluding the partitioned regeneration passage 12 and the tank housing chamber 19 constitutes a dehumidification passage 11 that allows the intake port 18 and the exhaust port 17 to communicate with each other via the dehumidification rotor 28.

  The dehumidifying rotor 28 can be rotated by the drive motor 29 across both the passages 11 and 12 so that about ¾ is located in the dehumidifying passage 11 and about ¼ is located in the regeneration passage 12. It is the disk-shaped thing arrange | positioned in. Specifically, as shown in FIG. 6, the dehumidifying rotor 28 is obtained by holding a rotor body 30 made of a mesh-like ceramic honeycomb bonded with zeolite or silica gel by a resin holding member 31. . A plurality of convex teeth 32 that mesh with a gear disposed on the output shaft of the drive motor 29 are provided on the outer peripheral portion of the holding member 31. In the present embodiment, the 12 convex teeth 32 positioned at intervals of 30 degrees are further extended toward the end, and the contact of the first micro switch 33 that detects the rotor lock state due to the failure of the drive motor 29 is pressed. A portion 32a is provided.

  The indoor air circulation fans 34A and 34B are constituted by a pair of sirocco fans arranged in the indoor air circulation fan arrangement portions 20A and 20B in the dehumidifying passage 11, and are rotated by driving of motors 35A and 35B, respectively. . As a result, as indicated by solid arrows in FIG. 2, indoor air is sucked from the intake port 18 of the rear cover 15, and the dry air dehumidified by the dehumidifying rotor 28 is circulated from the exhaust port 17 of the front cover 14 into the room. To supply.

  In the present embodiment, the motor 35A of the first indoor air circulation fan 34A has a speed change function capable of a “strong” operation with a fast rotation and a “weak” operation with a slow rotation. Further, the motor 35B of the second indoor air circulation fan 34B is a motor that can perform only “strong” operation with a fast rotation. When the user selects “quiet” operation, the indoor air circulation fan 34A is operated “weakly” and the indoor air circulation fan 34B is stopped. When the user selects “standard” operation, the indoor air circulation fan 34A is operated “weakly” and the indoor air circulation fan 34B is operated “strongly”. In addition, when the user selects “strong” operation, the indoor air circulation fan 34A is operated “strongly” and the indoor air circulation fan 34B is operated “strongly”.

  In other words, the dehumidifier of this embodiment is configured such that one indoor air circulation fan 34A always operates during any dehumidifying operation, regardless of the setting. In the indoor air circulation fan arrangement portion 20A of the indoor air circulation fan 34A in the vicinity of the heat generating component, a temperature fuse 36 that is sensitive to an abnormal temperature rise due to a motor failure of the indoor air circulation fan 34A is arranged. Yes.

  The regeneration air circulation fan 37 is disposed in the regeneration air circulation fan disposition portion 21 in the regeneration passage 12 and is rotated by driving a motor 38. As a result, the regenerated air in the regenerative passage 12 is supplied into the heater case 40 of the heater 39 via the duct portion 22 as shown by the dashed arrows in FIG. 2, and the dehumidifying rotor 28 and the heat exchanger are supplied. It is circulated in the order of 42.

  The heater 39 is disposed in front of the dehumidifying rotor 28 and generates heat by power supplied from a control board 64 described later to heat the regenerated air and the dehumidifying rotor 28. The heater 39 is composed of a continuous one-turn coil, and is arranged in the heater arrangement portion 24 via a heater case 40 constituting the regeneration passage 12. In the heater heater 24, a thermistor 41 is provided on the front side in the rotational direction of the dehumidifying rotor 28, and the heater 39 is controlled to be turned on and off, and the thermistor 41 sensitive to abnormal temperature rise due to motor failure of the regenerative air circulation fan 37. Has been.

  The heat exchanger 42 is disposed on the back side of the dehumidifying rotor 28 in the dehumidifying passage 11 and constitutes a part of the regeneration passage 12, and is shown in FIGS. 7 (A) and 7 (B). As shown, it is made of resin in which a pair of panels 43A and 43B formed by vacuum forming or pressure forming is welded. Each of the panels 43A and 43B includes a plurality of partitioning recesses 44A and 44B that are positioned symmetrically with each other, and a plurality of flow paths 45 that allow the regeneration air to pass therethrough are formed except for the partitioning recesses 44A and 44B. Yes. The one panel 43A is provided with a fan-shaped inlet 46, a circular outlet 47 corresponding to the duct 26 of the base frame 13, and a drain portion 48 for draining condensed water into the tank 52. It has been. Furthermore, a through-hole 49 for circulating the sucked air is provided in the bonded recesses 44A and 44B. In the present embodiment, the inflow port 46 is connected to a connection portion 51 formed on the rotor cover 50 disposed on the opposite surface of the dehumidifying rotor 28 from the heater case 40 that houses the heater 39. It is configured.

  As shown in FIG. 3B, the tank 52 has a box shape with an upper surface opening, and a float member 53 for detecting a full water condition is rotatably disposed therein. When the water level in the tank 52 rises, the entire float member 53 rotates as the lower float portion 53a rises.

  The tank storage chamber 19 is provided with a sub tank 54 having a box shape with an upper end opening. The sub tank 54 is provided with a valve 55 that can move in the horizontal direction. The valve 55 is configured to maintain a normally closed state by a spring, and when the tank 52 is attached, the float member 53 contacts and opens. Then, when the water level in the tank 52 rises and the float member 53 rotates, the pressure of the valve 55 is released and the valve is closed. The valve 55 is provided with a microswitch operating unit 56, and the microswitch operating unit 56 is configured to turn on or off the second microswitch 57 disposed adjacent to the sub tank 54.

  An operation panel 58 shown in FIG. 8 is disposed on the upper surface of the base frame 13. The operation panel 58 includes a switch 59A for turning on or off the negative ion generator from above, a switch 59B for selecting a clothing drying course mode, a switch 59C for selecting a dehumidifying operation mode, and a turn-off timer. A switch 59D for setting and a switch 59E for turning on or off the operation of the dehumidifier are provided.

  In the operation panel 58, first LEDs 60a, 60b, and 60c corresponding to three modes of clothes drying course, night drying, quick drying, and power saving, are provided above the switch 59B. Furthermore, second LEDs 61a, 61b, and 61c corresponding to three modes of silent, standard, and strong, which are dehumidifying operations, are provided above the switch 59C. Furthermore, on the upper part of the switch 59D, third LEDs 62a, 62b, 62c and 62d corresponding to 1 (hour), 2 (hour), 4 (hour) and 6 (hour) which are set times of the off timer are provided. ing. A fourth LED 63 indicating a state where the tank 52 is not mounted or a state where the tank 52 is full is provided below the switch 59E.

  As shown in FIG. 1, the dehumidifier includes a control board 64 on which a microcomputer 65 is mounted. The microcomputer 65 operates in response to the input of the direct current converted by the power supply circuit 66 connected to the commercial power supply, the power supply switch 59E is turned on, and the tank 52 is set in the tank housing chamber 19 of the exterior body 10. When the water is not full, power is supplied to the drive motor 29 of the dehumidifying rotor 28, the motors 35A and 35B of the indoor air circulation fans 34A and 34B, the motor 38 of the regenerative air circulation fan 37, and the heater 39. Energize to start dehumidifying operation. Further, when the tank 52 is full of water, the dehumidifying operation is stopped by stopping energization of the components.

  An unmounted state and a full state of the tank 52 are detected by the second micro switch 57. When the tank 52 is not attached, the second micro switch 57 detects the non-attached state because there is no input to the connection port of the microcomputer 65 because the second micro switch 57 is turned off. Can do. Further, since the second micro switch 57 is turned on when the tank 52 is mounted, the microcomputer 65 can detect the mounting state of the tank 52. Further, when the tank 52 is full and the tank 52 is full in a state where the tank 52 is mounted and the dehumidifying operation is being performed, the second micro switch 57 is turned off by the rotation of the float member 53. A full water condition can be detected.

  The safety device of the dehumidifier is configured by the first micro switch 33, the temperature fuse 36 and the thermistor 41 which are temperature sensitive means that changes the energized state in response to a preset temperature. Among them, in the present embodiment, once the abnormal temperature rise state is sensed, the temperature fuse 36 that can be restored only by parts replacement is detected and displayed on the fourth LED 63 by detecting the full state of the tank 52 as a predetermined operation. The second micro switch 57 and the microcomputer 65 which are detection means for stopping the dehumidifying operation are electrically connected in series.

  Between the microcomputer 65 and the heater 39, a relay 67 for turning on and off the heater 39 is disposed. Further, a triac 68 is provided between the microcomputer 65 and each of the motors 29, 35A, 35B, and 38 for on / off control thereof. FIG. 1 shows only the motor 35A.

  In the dehumidifier equipped with the safety device having the above-described configuration, when the user turns on the switch 59E, sets the tank 52 in the tank storage chamber 19, and operates the switch 59B or the switch 59C to select a desired dehumidifying operation. The microcomputer 65 performs a dehumidifying operation similar to the conventional one according to the selected course.

  If the dehumidified water in the tank 52 becomes full during the dehumidifying operation, the second micro switch 57 is turned off by the operation of the float member 53. Then, after turning on the fourth LED 63 of the operation panel 58, the microcomputer 65 stops the heater 39 via the relay 67 and dehumidifies the motors 29, 35A, 35B, and 38 via the triac 68. Stop operation.

  When the user notices that the fourth LED 63 on the operation panel 58 is turned on and drains the water in the tank 52 that has become full and installs the tank 52 in the tank housing chamber 19 again, the microcomputer 65 turns on the fourth LED 63 on the operation panel 58. After being lit, it returns to an operable state again.

  Further, when the motor 35A of the indoor air circulation fan 34A is locked or the exhaust port 17 is covered with clothes that are being dried, the surroundings of the indoor air circulation fan arrangement portion 20A are in an abnormally heated state. As a result, the temperature fuse 36 disposed in the indoor air circulation fan disposition portion 20A is melted, and the second micro switch 57 is turned off. As a result, the microcomputer 65 turns on the fourth LED 63 of the operation panel 58 and then stops the heater 39 via the relay 67 as well as the motors 29, 35A, 35B, 38 is turned off to stop the dehumidifying operation.

  When the user notices that the fourth LED 63 of the operation panel 58 is turned on and tries to drain the water in the tank 52 in the same manner as described above, it can be confirmed that the tank 52 is not yet full. Therefore, the user has confirmed that the indoor air circulation fan 34A has been locked for some reason or the interior of the exterior body 10 has been in an abnormally heated state, so that the temperature fuse 36 has melted and the dehumidifier itself has become inoperable. Can be recognized.

  As described above, in the configuration of the present invention, the temperature fuse 36 that is the temperature sensitive means constituting the safety device is disposed in the vicinity of the motor 35A that is the heat generating component, and the temperature fuse 36 and the existing second micro switch 57 are arranged. And connected to the microcomputer 65 in series. Therefore, even when the device is stopped by the operation of the safety function, power is supplied to the microcomputer 65 and the microcomputer 65 is in an operable state. Therefore, the existing fourth LED 63 can be operated and recognized by the user. That is, it can be implemented at low cost only by changing the electrical connection configuration by the lead wire without adding a circuit such as a zero cross circuit or a backup power source for detecting the connection state with the commercial power source.

  In addition, the household electrical appliance of this invention is not limited to the structure of the said embodiment, A various change is possible.

  For example, in the above-described embodiment, the microcomputer 65 is sensitive to an abnormal temperature rise of the motor 35A, which is a heat-generating component, and the microcomputer 65 can be operated by power from the commercial power source even after the sensing. However, as shown in FIG. A different temperature fuse 69 is disposed in the vicinity of the heater 39 which is a heatable component, and the temperature fuse 69 is electrically connected between the commercial power source and the power supply circuit 66 so that the heater 39 or the rotor lock or the like is connected. When the abnormal temperature rise due to the failure is detected, all the load parts including the microcomputer 65 may be stopped. Alternatively, as shown in FIG. 10, a thermal fuse 36 is disposed in the vicinity of the heater 39 that is a heating component, and the thermal fuse 36 is connected in series with the second microswitch 57 and the microcomputer 65 that are detection means. May be.

  In the above embodiment, the switch 57 is used as a detection unit for a full water condition that is a predetermined operation state, and the thermal fuse 36 is used as a temperature detection unit that changes the energization state in response to temperature. A sensor such as a water level sensor may be used, and the temperature sensitive means may be a thermostat or a thermistor including both a manual return type and an automatic return type. Specifically, in the above-described embodiment, the switch 57 and the thermal fuse 36 are combined. However, except for the combination of the sensor and the thermistor, the combination of the switch 57 and the manual return type thermostat, the switch 57 and the automatic return type. A combination with a thermostat, a combination of a switch 57 and a thermistor, a combination of a sensor and a thermal fuse 36, a combination of a sensor and a manual return thermostat, or a combination of a sensor and an automatic return thermostat may be used. .

  Here, since the manual return type thermostat needs to be disassembled and manually returned by the operator, in the case of the combination of the switch 57 and the manual return type thermostat, the same as the above embodiment, It is necessary to request repair. For this reason, the same operations and effects as those of the above-described embodiment can be obtained.

  Since the automatic reset thermostat recovers when the exterior body 10 is cooled, there is no need to request repair from the manufacturer in the case of a combination of the switch 57 and the automatic reset thermostat. However, each time the device is operated, the fourth LED 63 is displayed and stopped even though the tank 52 is not full, so that the user can recognize the abnormal temperature rise state.

  The thermistor changes the energization amount by changing the resistance value in response to the temperature. The microcomputer 65 changes the input energization amount as well as the change that the energization is cut off as in the above embodiment. Can be reliably detected. In the case of the combination of the switch 57 and the thermistor, as in the case of the combination of the switch 57 and the automatic return type thermostat, it is not necessary to request repair from the manufacturer. However, each time the device is operated, the fourth LED 63 is displayed and stopped even though the tank 52 is not full, so that the user can recognize the abnormal temperature rise state.

  The sensor, like a thermistor that is one of them, changes the resistance value by sensing a predetermined state such as a water level and changes the energization amount, and the microcomputer 65 can reliably detect the state change. . Therefore, in the case of the combination of the sensor and the thermal fuse 36, the combination of the sensor and the manual return type thermostat, or the combination of the sensor and the automatic return type thermostat, the detection can be performed as in the case of the combination of the switch 57 and the thermistor. Yes, it is possible to make the user recognize the abnormal temperature rise state.

  However, since the combination of the sensor and the thermistor changes the energization amount by changing the resistance value, the microcomputer 65 cannot determine the correct state. Therefore, this combination is not preferable.

  As described above, the detection means for detecting a predetermined operation and the temperature sensitive means for changing the energization state in response to temperature can be variously changed and combined. And the component which arrange | positions a temperature sensitive means is not restricted to heat generating components, such as a motor, Heating components, such as a heater, may be sufficient.

  Moreover, of the above combinations, when either the detection means or the temperature sensitive means is constituted by a sensor, that is, the combination of the switch 57 and the thermistor, the combination of the sensor and the thermal fuse 36, the sensor and the manual reset thermostat. In the case of the combination and the combination of the sensor and the automatic return type thermostat, different inputs are made to the microcomputer 65 depending on whether the tank 52 is full or when an abnormality occurs in the heat generating component or the heating component. Therefore, the difference can be recognized. For this reason, when the tank 52 becomes full, the operation of all the load parts is stopped as in the conventional case, and when an abnormality occurs in the heat generating part or the heating part, the heat generating part in which the abnormality has occurred and the heating It is also possible to control so that the parts are stopped, the fan in which no abnormality has occurred is operated, and the exterior body 10 is rapidly cooled.

  In the embodiment, the display means including the fourth LED 63 is used as means for notifying the user of the abnormal temperature rise state, but notification means such as a piezoelectric buzzer mounted on the control board 64 may be used. That is, when the display means for notifying the user already exists, the display means is used. When the display means for notifying the user does not exist, and when the existing means for notifying the user is the notification means. It is preferable to use a notification means.

  Furthermore, in the above embodiment, the dehumidifier is used as a household electrical product equipped with the safety device of the present invention. However, it may be a device equipped with a heat generating component or a heating component such as a humidifier, an air purifier, or a dishwasher. It is equally applicable.

  Here, when applied to a humidifier, the temperature sensitive means is arranged in the vicinity of a motor of a fan that supplies humidified air, and the remaining amount of water in a tank that stores water for humidifying the temperature sensitive means The switch is connected in series with the microcomputer 65 and the microcomputer 65 to notify the user using display means for displaying the water supply state.

  When applied to an air purifier, the temperature sensitive means is disposed in the vicinity of a motor of a fan that supplies purified air, and the temperature sensitive means is connected in series with a sensor that detects the clogging state of the filter and the microcomputer 65. Connect and inform the user using display means to display the clogging condition of the filter.

  When applied to a dishwasher, the temperature sensitive means is disposed in the vicinity of a motor of a fan that supplies air into the cabinet or a heater that heats water or air, and the temperature sensitive means is used to supply water from a water supply. A sensor for detecting whether or not hot water is supplied by a temperature sensor and a microcomputer 65 connected in series with the microcomputer 65 and using a notifying means for notifying water supply or notifying the supply state of hot water Inform the user.

It is a block diagram which shows the structure of the safety device of the household electrical appliance of this invention. It is the schematic which shows the dehumidifier which is household electric appliances. (A), (B) is sectional drawing which shows the specific structure of a dehumidifier. It is a disassembled perspective view which shows the structure of the front side of a base frame. It is a rear view which shows the structure of the rear surface side of a base frame. It is a disassembled perspective view which shows the structure of the rear surface side of a dehumidifier. (A) is a front view of a heat exchanger, (B) is a principal part expanded sectional view of (A). It is a front view which shows an operation panel. It is a block diagram which shows the modification of the safety device of household electrical appliances. It is a block diagram which shows the other modification of the safety device of household electrical appliances.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Exterior body 28 ... Dehumidification rotor 29 ... Drive motor (heat-generating component)
34A, 34B ... Indoor air circulation fans 35A, 35B ... Motors (heat generating parts)
36 ... Thermal fuse (Temperature sensitive means)
37 ... Regenerative air circulation fan 38 ... Motor (heat-generating component)
39 ... Heating heater (heating component)
57. Second micro switch (detection means)
63 ... Fourth LED (display means)
65 ... Microcomputer

Claims (3)

The exterior body includes a load component including a heat generating component such as a motor or a heating component such as a heater, and a microcomputer that executes the predetermined operation by controlling the load component, and is detected by a detection unit such as a switch or a sensor. In household electrical appliances having a function of detecting the operating state of and notifying the user by display means or notification means,
Temperature sensing means that is electrically connected in series to the detection means and the microcomputer and changes an energized state in response to temperature is disposed in the exterior body, and an abnormality in the exterior body is determined based on the energized state by the temperature sensitive means. An electrical appliance for home use, characterized in that the temperature rise state is notified to the user by the same display means or notification means as when the operation state is notified to the user .   2. The household electrical appliance according to claim 1, wherein the temperature sensitive means is disposed in the vicinity of the heat generating component or the heating component.   3. The household electrical appliance according to claim 1, wherein the microcomputer further stops a predetermined operation by the load component when the detection unit detects a predetermined operation state. 4.

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