JP2022098524A - Dryer - Google Patents

Abstract

To provide a dryer which suppresses leakage of electromagnetic waves when drying an object to be dried by radiating electromagnetic waves and, particularly, a dryer which suppresses the leakage of microwaves to the outside from a gap between a rotary body and a fixed part.SOLUTION: A drum type dryer includes: a housing; a drum provided rotatably in the housing and storing an object to be dried; and a microwave irradiation part for irradiating the object to be dried in the drum with microwaves. A shield part for suppressing leakage of the microwaves to the outside from the housing is constituted by containing at least a first choke part 25 for suppressing the leakage of the microwaves from a gap between a rotary body 3d which is part of the drum and a fixed part 26a which is part of the housing. The first choke part 25 is a gap constituted by the rotary body 3d and the fixed part 26a with the rotary body 3d sandwiched by the fixed part 26a. A choke groove 40 is provided in a first gap 38, and a rotation support part 42 is provided in a second gap 39.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a dryer for drying an object to be dried.

As a method for speeding up the drying performance of a clothes dryer or a washer / dryer, there is a method of using microwaves as a heat source for heating the moisture of clothes (see, for example, Patent Document 1). The washing machine with a high-frequency electromagnetic wave heating type dryer disclosed in Patent Document 1 has a metal surface on the inner surface of the body portion, the lower opening portion, and the upper opening portion to prevent leakage of the high-frequency electromagnetic wave. Further, in the high-frequency electromagnetic wave heating type dryer, drying parts are provided in the lower opening, and a metal surface is provided on the inner surface of the water storage tank to improve the heating efficiency. In addition, the high-frequency electromagnetic wave heating type dryer blows air using an air passage to improve the drying efficiency, cools the air containing moisture in a water tank, causes dew condensation, and discharges the dry air. ..

Japanese Unexamined Patent Publication No. 2001-293281

In order to improve the drying efficiency during the drying operation, the dryer irradiates the drying object with electromagnetic waves (microwaves) while rotating the drum, which is a tank containing the drying object. Therefore, it is necessary to have an electromagnetic wave shield that suppresses the leakage of electromagnetic waves from the drum when the drum rotates. The drum, which is a rotating body, is rotationally supported by providing a predetermined gap with respect to the fixed portion of the housing of the dryer, and does not come into contact with the fixed portion during rotation. Therefore, if there is no electromagnetic wave shield, electromagnetic waves leak out of the drum through the gap between the drum and the fixed portion. From the viewpoint of durability, the electromagnetic wave shield preferably has a non-contact structure in which the drum, which is a rotating body, and the fixed portion do not come into contact with each other. As this non-contact structure, for example, a groove for reflecting the electromagnetic wave is provided in the middle of the gap (leakage waveguide) where the electromagnetic wave leaks, and the leaked electromagnetic wave is combined with the reflected wave of the opposite phase generated in the groove to leak to the outside. It is conceivable to apply an electromagnetic wave shield with a so-called choke structure that suppresses it.

When the choke structure is applied, the gap where the electromagnetic wave leaks changes depending on the rotation of the drum, and it is considered that the performance of the electromagnetic wave shield is affected. In addition, in order to prevent contact between the drum and the fixed part, the gap where electromagnetic waves leak is generally compared to the gap in other parts (for example, non-rotating parts such as doors) in consideration of rotational vibration and dimensional variation of the drum. Widely set. However, if the gap through which the electromagnetic wave leaks is widened, the effect of the electromagnetic wave shield is reduced. In order to narrow the gap where electromagnetic waves leak, it is necessary to rotate the drum stably.

The present disclosure provides a dryer that suppresses leakage of electromagnetic waves when drying an object to be dried by irradiating it with electromagnetic waves.

The dryer in the present disclosure includes a housing, a drum rotatably provided inside the housing and accommodating a drying object, and a microwave irradiation unit that irradiates the drying object in the drum with microwaves. Be prepared. The shield part for suppressing the leakage of microwaves from the housing to the outside at least prevents the leakage of microwaves from the gap between the rotating body that is a part of the drum and the fixed part that is a part of the housing. It is configured to include a gap shield for restraining. The gap shield portion sandwiches the rotating body by the fixed portion, and has a microwave shield on at least one of the gaps on both sides composed of the rotating body and the fixed portion, and the gaps on both sides composed of the rotating body and the fixed portion. At least one of the above is provided with a rotation support portion that rotatably supports the rotating body on the fixed portion.

Further, the dryer in the present disclosure includes a housing, a drum rotatably provided inside the housing and accommodating the drying object, and a microwave irradiation unit that irradiates the drying object in the drum with microwaves. , Equipped with. The shield part for suppressing the leakage of microwaves from the housing to the outside at least prevents the leakage of microwaves from the gap between the rotating body that is a part of the drum and the fixed part that is a part of the housing. It is configured to include a gap shield for restraining. The gap shield portion has a fixed portion sandwiched between rotating bodies, and a microwave shield is provided on at least one of the gaps on both sides composed of the rotating body and the fixed portion, and the gaps on both sides composed of the rotating body and the fixed portion are provided. At least one of the above is provided with a rotation support portion that rotatably supports the rotating body to the fixed portion.

In the dryer of the present disclosure, the gap shield portion sandwiches the rotating body by the fixing portion, and the rotating body and the fixing portion are provided with a microwave shield in at least one of the gaps on both sides composed of the rotating body and the fixing portion. A rotary support portion that rotatably supports the rotating body to the fixed portion is provided in at least one of the gaps on both sides configured by the above. Therefore, it is possible to suppress the change in the gap between the rotating body which is a part of the drum and the fixed portion which is a part of the housing, and it is possible to suppress the leakage of microwaves.

Further, in the dryer of the present disclosure, the gap shield portion has a fixed portion sandwiched by a rotating body, and the gap shield portion is provided with a microwave shield at at least one of the gaps on both sides composed of the rotating body and the fixed portion, and is fixed to the rotating body. A rotation support portion that rotatably supports the rotating body to the fixed portion is provided in at least one of the gaps on both sides formed by the portions. Therefore, it is possible to suppress the change in the gap between the rotating body which is a part of the drum and the fixed portion which is a part of the housing, and it is possible to suppress the leakage of microwaves.

Schematic vertical sectional view of the drum type dryer according to the first embodiment. Schematic cross-sectional view of the drum type dryer according to the first embodiment. Schematic vertical sectional view of the first choke portion according to the first embodiment. Schematic vertical sectional view of the drum type dryer according to the second embodiment. Schematic vertical sectional view of the first choke portion according to the second embodiment. Schematic vertical sectional view of the drum type dryer according to the third embodiment. Schematic vertical sectional view of the first choke portion according to the third embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters or duplicate explanations for substantially the same configuration may be omitted.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 and 2.

[1-1. Constitution]
FIG. 1 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the first embodiment. FIG. 2 is a schematic cross-sectional view schematically showing the configuration of the drum type dryer according to the first embodiment. The drum type dryer 60 of the present embodiment has a function of drying an object to be dried such as clothes. The left direction in FIG. 1 is the front side of the drum type dryer 60. Although not shown, the drum type dryer 60 may be provided with an air circulation device for promoting drying.

The drum type dryer 60 has a function of irradiating a drying object in a drum with microwaves, which is a kind of electromagnetic wave. First, the basic configuration and operation of the drum type dryer 60 will be described. After that, the details of the shield portion for suppressing the leakage of the microwave from the housing when irradiating the microwave in the drum type dryer 60 will be described.

A drum 3 for accommodating an object to be dried such as clothes is rotatably provided as a rotating body inside the housing 1 of the drum type dryer 60. The drum 3 is formed in a bottomed cylindrical shape. The drum 3 is provided so that the rotating shaft 14 is horizontal. In another example, the drum 3 may be provided so that the rotating shaft 14 is inclined forward with respect to the horizontal, or the rotating shaft 14 may be provided so as to be vertical.

A drive motor 6 is attached below the drum 3 to rotate the belt 15 during the drying operation of the object to be dried. As a result, the drum 3 rotates in the forward direction or the reverse direction around the rotation axis 14.

The opening 19 and the door body 5 that opens and closes the opening 19 are provided at positions on the front surface of the housing 1 facing the opening end of the drum 3. By opening the door body 5, the user can put the object to be dried in and out of the drum 3.

The drum 3 has a drum front portion 3a and a drum rear portion 3b. The drum front portion 3a has a drum opening 3c provided at a position facing the opening 19 of the housing 1. The drum rear portion 3b is provided behind the drum front portion 3a. The drum front portion 3a may be a top surface portion of the drum 3 formed in a bottomed cylindrical shape. In that case, the drum rear portion 3b may be a side surface portion and a bottom surface portion of the cylinder. The drum front portion 3a may include a portion in front of the side surface portion in addition to the top surface portion of the cylinder. In that case, the drum rear portion 3b may be the rest behind the side surface portion of the cylinder and the bottom surface portion.

The drum rear portion 3b may include a portion of the side surface portion of the top surface portion in addition to the side surface portion and the bottom surface portion of the drum 3. In that case, the drum front portion 3a may be the remaining portion of the top surface portion of the cylinder on the drum opening 3c side. The front part 3a of the drum and the rear part 3b of the drum may be manufactured integrally, or may be manufactured separately, and the drum 3 may be formed by connecting them.

A tubular communication portion 26 is provided between the drum 3 and the door body 5. The communication portion 26 is a fixed portion fixed to the housing 1 and does not rotate together with the drum 3.

A microwave irradiation unit 30, a waveguide 34, and a microwave irradiation port 32 are provided in the communication unit 26. The microwave irradiation unit 30 constituting the heating unit for heating the object to be dried irradiates the microwave from the microwave irradiation port 32 into the drum 3 via the waveguide 34, and the object to be dried in the drum 3. Heats the water contained in the object. The microwave irradiation unit 30 and the waveguide 34 are provided in the communication unit 26 to suppress the vibration of the microwave irradiation unit 30 and the waveguide 34 when the drum 3 is rotated. This can improve the stability and safety of microwave irradiation.

The microwave irradiation unit 30 may be a microwave oscillator such as a magnetron, and oscillates an electromagnetic wave having a frequency in the 2.45 GHz band, for example. ISM (Industry S)
The electromagnetic wave is not limited to the 2.45 GHz band assigned as the signal Medical) band, and may be an electromagnetic wave having a frequency such as the 915 MHz band similarly assigned.

Of the microwaves radiated into the drum 3, some of the microwaves that were not absorbed by the moisture contained in the object to be dried are reflected from the drum 3 to the microwave irradiation port 32 and the waveguide 34. It returns to the microwave irradiation unit 30 through. A reflecting unit for reflecting a part or all of the reflected wave reflected from the drum 3 and traveling in the direction of returning to the microwave irradiation unit 30 is provided, and the drum is again provided with the microwave emitted from the microwave irradiation unit 30. It may be incident into the inside of 3. As a result, energy loss can be reduced and the drying operation time can be shortened.

The control device 20 is provided in the housing 1. The control device 20 controls the drive motor 6, the microwave irradiation unit 30, and the like. The control device 20 controls the drying operation according to the instruction input by the user.

Although not shown, a heater may be further provided as a heating unit for heating the object to be dried. The microwave irradiation unit 30 and the heater may be energized to both or one of them at the same time. For example, when the control device 20 has a metal such as a button or a fastener attached to clothes to be dried and there is a high possibility that sparks are generated, the microwave irradiation unit 30 irradiates the inside of the drum 3 with microwaves. The output may be reduced or stopped and switched to heating with a heater.

The function of the control device 20 may be realized by a microcomputer and peripheral circuits as an example. The microcomputer and peripheral circuits may be in any form as long as they perform the control described later.

The control device 20 may be composed of an arithmetic processing unit and a storage unit that stores a control program. Examples of the arithmetic processing unit include an MPU (Micro Processing Unit) and a CPU (Central Processing Unit). A memory is exemplified as a storage unit. The control program recorded in the storage unit is executed by the arithmetic processing unit.

Further, the control device 20 may be configured by hard logic. If it is configured with hard logic, it is effective in improving the processing speed. Each component may be composed of one semiconductor chip or may be physically composed of a plurality of semiconductor chips. When the control device 20 is configured by a plurality of semiconductor chips, each control described later can be realized by different semiconductor chips. It can also be realized by combining the above-mentioned microcomputer and peripheral circuits with the later-mentioned hard logic.

In the drum type dryer 60 of the present embodiment, since the drum 3 is irradiated with microwaves, the intensity of the electromagnetic wave leaking to the outside of the drum type dryer 60 is equal to or less than the reference value determined in the area where it is used. It needs to be configured to be. Therefore, the drum type dryer 60 of the present embodiment includes a shield portion for suppressing leakage of electromagnetic waves irradiated from the microwave irradiation port 32.

As a standard for leaked electromagnetic waves, for example, the Japanese Industrial Standards "JIS" that regulates microwave ovens with a rated high frequency output of 2 kW or less that heat food with electromagnetic waves (microwaves) with a frequency of 2.45 GHz and microwave ovens with additional devices. There is "C9250". In 5.8 of the same standard, "When the power density of the leaked radio wave measured by the power density test of the leaked radio wave specified in 8.2.12 of the same standard is (1) when the door is closed, 1 mW / cm ² or less, (2) 5 mW / cm ² or less when the door is opened and fixed to the maximum position immediately before the oscillation stop device of the oscillation tube operates, (3) Main oscillation It must be 5 mW / cm ² or less with the oscillation stop device other than the stop device constrained. " In addition, Appendix 8 of the Circulaire on the Interpretation of the "Ministerial Ordinance that Establishes Technical Standards for Electrical Appliances" that stipulates the technical standards specified by the Ordinance of the Ministry of Economy, Trade and Industry, which is stipulated in Article 8, Paragraph 1 of the Electrical Appliance and Material Safety Law. Section 2 (95) has almost the same contents. For washer-dryers, the same standards as for microwave ovens are considered to be appropriate.

In addition, the WHO (World Health Organization) recommends that the guidelines of the International Commission on Non-Ionizing Radiation Protection (ICNIRP) prepared on the basis of scientific evidence by experts from each country be adopted as the exposure limit for human body protection. There is. This guideline stipulates that the exposure limit is 0.08 W / kg (1 mW / cm ² ). The international standard "IEC62233" established by the International Electrotechnical Commission (IEC) and the Japanese Industrial Standards "JIS 1912" established based on it include the measurement of electromagnetic fields related to human exposure from household electrical equipment and similar equipment. The method is specified. In the measurement method specified in the standard, the electromagnetic field is measured as a ratio to the exposure limit value by weighting the signal of the sensor that detects the electromagnetic field, and the exposure limit value specified in the ICNIRP guideline. If it does not exceed, it is determined that the ICNIRP guidelines are met. The shield portion is configured to comply with these standards.

In the microwave oven, the storage chamber in which the object to be heated is housed is fixed, and large vibration does not occur during microwave irradiation. However, in the drum type dryer 60 of the present embodiment, the drying efficiency is high. For improvement, the drum 3 is rotated during the drying operation, resulting in vibration of the drum 3.

Of the configurations of the drum type dryer 60 according to the first embodiment shown in FIGS. 1 and 2, the members constituting the shield portion are shown by thick solid lines. In the drum type dryer 60 of the first embodiment, the shield portion is an example of the gap shield portion provided in the gap between the door body 5, the communication portion 26, the drum 3, and the communication portion 26 and the drum 3. The first choke portion 25 and the second choke portion 27, which is an example of the gap shield portion provided in the gap between the door body 5 and the communication portion 26, are included.

The door body 5, the communication portion 26, and the drum 3 include a conductive material such as a metal capable of reflecting or absorbing microwaves. For example, the door body 5, the communication portion 26, or the drum 3 may be entirely formed of an electromagnetic wave shielding material such as a conductive material. Further, the door body 5, the communication portion 26, or the drum 3 may be formed of a material such as resin, and a plating layer of a conductive material may be provided on the inner surface or the outer surface. Further, the door body 5, the communication portion 26, or the drum 3 may be formed of a material such as resin, and a layer of an electromagnetic wave shielding material may be provided on the inner surface, the outer surface, or the inside. The drum 3 may be provided with holes through which water vapor and air can pass, but in this case, these holes are formed in a size such that microwaves do not leak.

The first choke portion 25 and the second choke portion 27 may have any choke structure known in a technical field such as a microwave oven. For example, the first choke portion 25 or the second choke portion 27 may be composed of a plurality of choke grooves. According to the plurality of chokes, the leakage of microwaves can be suppressed in a plurality of stages, and the shielding performance for preventing the leakage is improved. Further, the plurality of choke grooves may have the dimensions or shape of each choke changed according to the wavelength of the microwave emitted from the microwave irradiation unit, and for example, a reflected wave having a phase opposite to the leaking electromagnetic wave may be generated. , May be composed of a step choke.

Further, the choke structure may be configured by filling at least a part of the space of the groove that generates the reflected wave with a resin. As a result, the choke structure can be made thinner and smaller, so that the size of the gap between the communication portion 26 constituting the first choke portion 25 and the drum front portion 3a can be reduced, and the first choke portion 25 allows the drum 3 to be reduced in size. It is possible to suppress the decrease in volume.

As a gap shield portion provided over the entire circumference in the gap between the door body 5 and the communication portion 26, or as a gap shield portion provided over the entire circumference in the gap between the communication portion 26 and the drum 3, a choke structure or the like may be used. Instead of the reflective microwave shield, an absorbent microwave shield such as a dielectric may be provided. In addition, a non-contact type microwave shield of any type may be provided as a gap shield portion.

Further, the first choke portion 25 may include a seal portion 29. The seal portion 29 is provided in the gap between the communication portion 26 and the drum front portion 3a, and seals between the communication portion 26 and the drum front portion 3a. As a result, it is possible to prevent the drying air in the drum 3 from flowing to the outside. The sealing portion 29 does not have to completely seal the gap between the communicating portion 26 and the drum front portion 3a. The seal portion 29 may have a sliding contact type configuration. The seal portion 29 may be made of any of felt, resin, rubber, and the like. Further, although not shown, the seal portion 29 may be provided in the second choke portion 27.

FIG. 3 is an enlarged schematic vertical sectional view of the first choke portion 25, which is the gap shield portion according to the first embodiment. The first choke portion 25 sandwiches the cylindrical rotating body 3d, which is a part of the drum front portion 3a, from both sides by the fixing portion 26a, which is a part of the communicating portion 26, and the drum 3 to be rotated is a drum type dryer. It is fixed to the housing of 60. A first gap 38 and a second gap 39 are provided between the rotating body 3d and the fixed portion 26a so that the rotating body 3d does not come into contact with the fixed portion 26a when the drum 3 is rotated.

The first choke portion 25 is provided with a rotation support portion 42 that rotatably supports the rotating body 3d, which is a part of the drum 3, in the second gap 39. The rotation support portion 42 may be, for example, a rolling bearing such as a ball bearing, or a sliding bearing may be used. As a result, it is possible to suppress the change in the gap between the fixed portion 26a of the first choke portion 25 and the rotating body 3d caused by rotating the drum 3 during the drying operation, and to suppress the leakage of microwaves. Further, the rotation support portion 42 may be configured to seal between the rotating body 3d and the fixing portion 26a so as to prevent the drying air in the drum 3 from flowing to the outside.

Further, the rotation support portion 42 may have conductivity so that the fixing portion 26a and the rotating body 3d can be made conductive. As a result, in addition to the shielding effect of the choke groove 40 described later, microwave leakage from the gap between the rotating body 3d, which is a part of the drum 3, and the fixed portion 26a, which is a part of the communicating portion 26, to the outside. Can be further suppressed.

Further, in the first choke portion 25, a choke groove 40 which is a microwave shield is provided in the first gap 38, and the microwave irradiating the drum 3 is generated from the gap between the rotating body 3d and the fixed portion 26a in FIG. Leakage can be suppressed as shown by the arrow. The choke groove 40 may be composed of one groove or a plurality of grooves. Further, the microwave shield may be realized by a configuration other than the choke groove.

The first choke portion 25 has a choke groove 40 as a first gap 38 or a second gap in the first gap 38 and the second gap 39, which are gaps formed by the fixing portion 26a and the rotating body 3d. In preparation for 39, the rotation support portion 42 is provided in the first gap 38 or the second gap 39.

For example, as shown in FIG. 3, the choke groove 40 may be provided in the first gap 38, and the rotation support portion 42 may be provided in the second gap 39. As a result, the first choke portion 25 is the drum type dryer 6.
The length of 0 in the front-back direction can be shortened.

Although not shown, the rotation support portion 42 may be provided in the first gap 38, and the choke groove 40 may be provided in the second gap 39. Further, the rotation support portion 42 may be provided in the first gap 38 and the second gap 39. The choke groove 40 may be provided in the first gap 38 and the second gap 39.

The choke groove 40 may be arranged in the gap on the side of the rotation support portion 42 that leads to the drum 3, that is, in the first gap 38 that leads to the inside of the rotating body 3d in FIG. As a result, the microwave emitted from the microwave irradiation unit 30 is weakened by the choke groove 40, and the rotation support portion 42 can be prevented from being damaged or deteriorated by being heated by the microwave.

Further, the first choke portion 25 may include a sealing portion 29 that seals a gap between the rotating body 3d and the fixing portion 26a.

For example, the seal portion 29 is arranged between the first gap 38 and the second gap 39. As shown in FIG. 3, the seal portion 29 is arranged at the bent portion of the first choke portion 25, and the first gap 38 and the second gap 39 are stably held by a member such as felt or rubber. , And may be sealed.

Further, the seal portion 29 may be arranged between the choke groove 40 and the rotation support portion 42. As a result, the microwave emitted from the microwave irradiation unit 30 is weakened by the choke groove 40, and the seal portion 29 can be prevented from being damaged or deteriorated by being heated by the microwave.

[1-2. motion]
The operation and operation of the drum type dryer 60 configured as described above will be described below.

When the user opens the door body 5, accommodates the object to be dried in the drum 3, and instructs the start of the drying operation, the control device 20 starts the drying operation. The control device 20 drives the drive motor 6 to rotate the drum 3 and controls the microwave irradiation unit 30 to generate microwaves. The microwave is irradiated into the drum 3 through the waveguide 34 and the microwave irradiation port 32. As a result, the water contained in the object to be dried in the drum 3 is heated and evaporated.

After a lapse of a predetermined time, the control device 20 stops driving the drive motor 6 and irradiating the microwave from the microwave irradiation unit 30, and ends the drying operation. The control device 20 may estimate the amount of water contained in the object to be dried, and may end the drying operation when the amount of water becomes less than a predetermined amount. The control device 20 may operate the air circulation device during the drying operation.

In the drum type dryer 60, the amount and weight of the object to be dried vary, and the weight of the object to be dried varies between the beginning and the end of the drying operation. Further, the drum 3 rotates and vibrates during the drying operation. Therefore, in the design of the drum type dryer 60, it is necessary to consider that the size of the gap between the fixed portion 26a constituting the first choke portion 25 and the rotating body 3d changes. Further, in the design of the drum type dryer 60, it is necessary to consider that the gap between the fixed portion 26a and the rotating body 3d has dimensional variation at the time of manufacture due to the structure of the drum type dryer 60. Further, in the design of the drum type dryer 60, it is necessary to consider that the frequency of the microwave varies depending on the operating condition of the drum type dryer 60.

Therefore, the first choke portion 25 sandwiches the rotating body 3d across the fixing portion 26a in order to suppress leakage of microwaves from the gap between the rotating body 3d and the fixing portion 26a to the outside. Then, the choke groove 40 is provided in the first gap 38. As a result, the leakage of microwaves can be suppressed by the choke groove 40.

Further, by providing the rotary support portion 42 that rotatably supports the rotating body 3d in the gap between the rotating body 3d and the fixed portion 26a, the gap between the rotating body 3d and the fixed portion 26a is stabilized and the drum 3 is rotated. Can be made to. This makes it possible to suppress the leakage of microwaves and improve the drying efficiency of the object to be dried contained in the drum 3. Further, by providing the rotation support portion 42 in the first choke portion 25, the first choke portion 25 can be configured in a space-saving manner. That is, it is possible to suppress the decrease in the volume of the drum 3 and to dry many objects to be dried, and it is possible to improve the convenience of the user.

Further, the first choke portion 25 is provided with a rotation support portion 42 that rotatably supports the rotating body 3d in the second gap 39. As a result, it is possible to suppress the change in the gap between the fixed portion 26a of the first choke portion 25 and the rotating body 3d, and to suppress the leakage of microwaves.

[1-3. Effect, etc.]
As described above, in the present embodiment, the drum type dryer 60 is rotatably provided inside the housing 1, the housing 1, and the drum 3 for accommodating the object to be dried, and the drying inside the drum 3. A microwave irradiation unit 30 for irradiating an object with microwaves is provided. The shield portion for suppressing the leakage of microwaves from the housing 1 to the outside is at least from the gap between the rotating body 3d which is a part of the drum 3 and the fixed portion 26a which is a part of the housing 1. It is configured to include a first choke portion 25 which is a gap shield portion for suppressing leakage of microwaves. The first choke portion 25 has a rotating body 3d sandwiched by a fixing portion 26a, and has a choke groove 40 which is a microwave shield in at least one of the gaps on both sides formed by the rotating body 3d and the fixing portion 26a and rotates. A rotary support portion 42 that rotatably supports the rotating body 3d to the fixed portion 26a is provided in at least one of the gaps on both sides formed by the body 3d and the fixed portion 26a. That is, the choke groove 40 is provided in at least one of the first gap 38 or the second gap 39, and the rotation support portion 42 is provided in at least one of the first gap 38 or the second gap 39.

With this configuration, the first choke portion 25 changes the gap between the rotating body 3d and the fixed portion 26a when irradiating the dried object with microwaves while rotating the drum 3 containing the dried object. It can be suppressed and microwave leakage can be suppressed.

Further, in the present embodiment, the first choke portion 25 is provided with a choke groove 40 in one of the gaps composed of the fixed portion 26a and the rotating body 3d, and is composed of the fixed portion 26a and the rotating body 3d. The rotation support portion 42 may be provided on the other side of the gap. That is, the choke groove 40 is provided in the first gap 38, and the rotation support portion 42 is provided in the second gap 39. Alternatively, the rotation support portion 42 may be provided in the first gap 38, and the choke groove 40 may be provided in the second gap 39.

With this configuration, the length of the first choke portion 25 in the front-rear direction of the drum type dryer 60 can be shortened.

Further, in the present embodiment, the choke groove 40 may be provided on the side of the rotation support portion 42 that leads to the inside of the rotating body 3d in the gap formed by the fixing portion 26a and the rotating body 3d.

With this configuration, the microwave emitted from the microwave irradiation unit 30 is weakened by the choke groove 40, and the rotation support portion 42 can be prevented from being damaged or deteriorated by being heated by the microwave.

Further, in the present embodiment, the first choke portion 25 may further include a sealing portion 29 that seals a gap between the fixing portion 26a and the rotating body 3d.

With this configuration, the seal portion 29 can prevent the drying air in the drum 3 from flowing to the outside. Further, since the rotary support portion 42 is sealed with the drum 3 by the seal portion 29, it is possible to suppress the accumulation of dust due to the inflow of air from the inside of the drum 3 and the generation of dew condensation due to the inflow of moisture, and the function of the rotary support portion 42 is The decrease can be suppressed.

Further, in the present embodiment, the rotation support portion 42 may have conductivity so that the fixing portion 26a and the rotating body 3d can be made conductive.

With this configuration, in addition to the shielding effect of the choke groove 40, it is possible to further suppress the leakage of microwaves from the gap between the rotating body 3d and the fixing portion 26a to the outside.

(Embodiment 2)
Hereinafter, the second embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the second embodiment. FIG. 5 is an enlarged schematic vertical sectional view of the first choke portion 25, which is the gap shield portion according to the second embodiment. The same configurations and operations as those of the first embodiment are given the same numbers as those of the first embodiment, and detailed description thereof will be omitted.

In the drum type dryer 60 of the second embodiment, the first choke portion 25 is a choke that is a microwave shield in the second gap 39, which is one of the gaps composed of the fixed portion 26a and the rotating body 3d. A groove 40 and a rotation support portion 42 are provided.

Further, the first choke portion 25 may include a seal portion 29 that seals the gap between the rotating body 3d and the fixing portion 26a, as in the first embodiment. For example, the seal portion 29 is arranged between the first gap 38 and the second gap 39. With this configuration, since the choke groove 40 and the rotation support portion 42 are sealed with the drum 3 by the seal portion 29, it is possible to suppress the accumulation of dust due to the inflow of air from the inside of the drum 3 and the generation of dew condensation due to the inflow of moisture. Therefore, it is possible to suppress deterioration of the shielding performance of the choke groove 40 and the function of the rotation support portion 42.

Further, as shown in FIG. 5, the seal portion 29 is arranged at the bent portion of the first choke portion 25, and the first gap 38 and the second gap 39 are stably provided with a member such as felt or rubber. It may be held and sealed.

Further, as shown in FIG. 5, the choke groove 40 is located in the gap on the side of the rotation support portion 42 that leads to the drum 3 inside the rotating body 3d, that is, on the seal portion 29 side with respect to the rotation support portion 42. It may be arranged.

As a result, the microwave emitted from the microwave irradiation unit 30 is weakened by the choke groove 40, and the rotation support portion 42 can be prevented from being damaged or deteriorated by being heated by the microwave.

Although not shown, the choke groove 40 and the rotation support portion 42 may be provided in the first gap 38. The choke groove 40 may be arranged in a gap on the side leading to the drum 3 with respect to the rotation support portion 42, that is, on the drum 3 side with respect to the rotation support portion 42. As a result, the microwave emitted from the microwave irradiation unit 30 is weakened by the choke groove 40, and the rotation support portion 42 can be prevented from being damaged or deteriorated by being heated by the microwave.

As described above, in the present embodiment, the first choke portion 25, which is the gap shield portion, has a microwave in the second gap 39, which is one of the gaps composed of the fixed portion 26a and the rotating body 3d. It is provided with a choke groove 40 which is a shield and a rotation support portion 42.

Further, in the present embodiment, the seal portion 29 is arranged on the side communicating with the inside of the rotating body 3d with respect to the choke groove 40 which is a microwave shield in the gap formed by the fixing portion 26a and the rotating body 3d. ..

With this configuration, since the choke groove 40 and the rotation support portion 42 are sealed with the drum 3 by the seal portion 29, it is possible to suppress the accumulation of dust due to the inflow of air from the inside of the drum 3 and the generation of dew condensation due to the inflow of moisture. Therefore, it is possible to suppress deterioration of the shielding performance of the choke groove 40 and the function of the rotation support portion 42.

(Embodiment 3)
Hereinafter, the third embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the third embodiment. FIG. 7 is an enlarged schematic vertical sectional view of the first choke portion 25, which is the gap shield portion according to the third embodiment. The same configurations and operations as those of the first and second embodiments are assigned the same numbers as those of the first and second embodiments, and detailed description thereof will be omitted.

In the drum type dryer 60 of the third embodiment, the first choke portion 25 has a fixed portion 26a, which is a part of the communication portion 26, from both sides by a cylindrical rotating body 3d, which is a part of the drum front portion 3a. The drum 3 that is sandwiched and rotated is fixed to the housing of the drum type dryer 60. A first gap 38 and a second gap 39 are provided between the rotating body 3d and the fixed portion 26a so that the rotating body 3d does not come into contact with the fixed portion 26a when the drum 3 is rotated.

The first choke portion 25 is provided with a rotation support portion 42 that rotatably supports the rotating body 3d in the second gap 39. The rotation support portion 42 may be, for example, a rolling bearing such as a ball bearing, or a sliding bearing may be used. As a result, it is possible to suppress the change in the gap between the fixed portion 26a of the first choke portion 25 and the rotating body 3d, and to suppress the leakage of microwaves. Further, the rotation support portion 42 may be configured to seal between the rotating body 3d and the fixing portion 26a so as to prevent the drying air in the drum 3 from flowing to the outside.

The first choke portion 25 has a choke groove 40 as a first gap 38 or a second gap in the first gap 38 and the second gap 39, which are gaps formed by the fixing portion 26a and the rotating body 3d. In preparation for 39, the rotation support portion 42 is provided in the first gap 38 or the second gap 39.

For example, as shown in FIG. 7, the choke groove 40 may be provided in the first gap 38, and the rotation support portion 42 may be provided in the second gap 39. As a result, the length of the first choke portion 25 in the front-rear direction of the drum type dryer 60 can be shortened.

Although not shown, the rotation support portion 42 may be provided in the first gap 38, and the choke groove 40 may be provided in the second gap 39. Further, the rotation support portion 42 may be provided in the first gap 38 and the second gap 39. The choke groove 40 may be provided in the first gap 38 and the second gap 39.

This makes it possible to suppress the leakage of microwaves and improve the drying efficiency of the object to be dried contained in the drum 3. Further, by providing the rotation support portion 42 in the first choke portion 25, the first choke portion 25 can be configured in a space-saving manner. That is, it is possible to suppress the decrease in the volume of the drum 3 and dry many objects to be dried, so that the convenience of the user can be improved.

Further, the first choke portion 25 is provided with a rotation support portion 42 that rotatably supports the rotating body 3d in the second gap 39. As a result, it is possible to suppress the change in the gap between the fixed portion 26a of the first choke portion 25 and the rotating body 3d, and to suppress the leakage of microwaves.

Further, the first choke portion 25 has a seal portion 29 that seals the gap between the rotating body 3d and the fixing portion 26a, and the choke groove 40 and the rotation support portion 42 in the first gap and the second gap. On the other hand, it may be arranged in the gap on the side leading to the drum 3, that is, on the side of the first gap 38 leading to the inside of the rotating body 3d. As shown in FIG. 7, the sealing portion 29 is arranged at the bent portion of the first choke portion 25 to stably hold the rotating body 3d and the fixing portion 26a with a member such as felt or rubber, and seal the sealing portion 29. You may stop.

With this configuration, since the choke groove 40 and the rotation support portion 42 are sealed with the drum 3 by the seal portion 29, it is possible to suppress the accumulation of dust due to the inflow of air from the inside of the drum 3 and the generation of dew condensation due to the inflow of moisture. Therefore, it is possible to suppress deterioration of the shielding performance of the choke groove 40 and the function of the rotation support portion 42.

Further, as shown in FIG. 7, the choke groove 40 may be arranged in the gap on the side leading to the drum 3 with respect to the rotation support portion 42, that is, on the seal portion 29 side with respect to the rotation support portion 42. As a result, the microwave emitted from the microwave irradiation unit 30 is weakened by the choke groove 40, and the rotation support portion 42 can be prevented from being damaged or deteriorated by being heated by the microwave.

As described above, in the present embodiment, the drum type dryer 60 is rotatably provided inside the housing 1, the housing 1, and the drum 3 for accommodating the object to be dried, and the drying inside the drum 3. A microwave irradiation unit 30 for irradiating an object with microwaves is provided. The shield portion for suppressing the leakage of microwaves from the housing 1 to the outside is at least from the gap between the rotating body 3d which is a part of the drum 3 and the fixed portion 26a which is a part of the housing 1. It is configured to include a first choke portion 25 which is a gap shield portion for suppressing leakage of microwaves. The first choke portion 25 has a fixed portion 26a sandwiched by a rotating body 3d, and has a choke groove 40 which is a microwave shield in at least one of the gaps on both sides formed by the rotating body 3d and the fixed portion 26a and rotates. A rotary support portion 42 that rotatably supports the rotating body 3d to the fixed portion 26a is provided in at least one of the gaps on both sides formed by the body 3d and the fixed portion 26a. That is, the choke groove 40 is provided in at least one of the first gap 38 or the second gap 39, and the rotation support portion 42 is provided in at least one of the first gap 38 or the second gap 39.

With this configuration, the first choke portion 25 changes the gap between the rotating body 3d and the fixed portion 26a when irradiating the dried object with microwaves while rotating the drum 3 containing the dried object. It can be suppressed and microwave leakage can be suppressed.

(Other embodiments)
As described above, Embodiments 1 to 3 have been described as examples of the techniques disclosed in the present application. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. have been made. Further, it is also possible to combine the components described in the above-described first to third embodiments to form a new embodiment.

In the first to third embodiments, the drum type dryer 60 has been described as an example of the dryer. The dryer may be a dryer other than the drum type, a washer / dryer, or the like. For example, it may be applied to a vertical washer / dryer or the like. The object to be dried may be something other than clothing.

Since the above-described embodiment is for exemplifying the technique in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of claims or the equivalent thereof.

Further, any combination of the components described in the above embodiments, and the conversion of the expressions of the present disclosure between methods, devices, systems, recording media, computer programs, etc. are also effective as aspects of the present disclosure. be.

The dryer of the present disclosure is applicable to a dryer that suppresses leakage of microwaves to the outside through a gap between a rotating body and a fixed portion that is a part of a housing. It may be a washer / dryer or the like. For example, it may be applied to a vertical washer / dryer, a vertical dryer, or the like. Further, any heating device that heats using electromagnetic waves may be used, and the object to be heated can be applied to other than clothing.

1 Housing 3 Drum 3a Drum front 3b Drum rear 3c Drum opening 3d Rotating body 5 Door body 6 Drive motor 14 Rotating shaft 15 Belt 19 Opening 20 Control device 25 First choke part (gap shield part)
26 Communication part 26a Fixed part 27 Second choke part 29 Seal part 30 Microwave irradiation part 32 Microwave irradiation port 34 Waveguide 38 First gap 39 Second gap 40 Choke groove (microwave shield)
42 Rotating support 60 Drum type dryer

Claims (8)

With the housing
A drum rotatably provided inside the housing and accommodating an object to be dried,
A microwave irradiation unit that irradiates the object to be dried in the drum with microwaves,
Equipped with
The shield portion for suppressing the leakage of the microwave from the housing to the outside is at least the said from the gap between the rotating body which is a part of the drum and the fixed part which is a part of the housing. It is configured to include a gap shield to suppress microwave leakage.
The gap shield portion sandwiches the rotating body by the fixing portion.
A microwave shield is provided in at least one of the gaps on both sides formed by the rotating body and the fixing portion.
A rotation support portion that rotatably supports the rotating body to the fixing portion is provided in at least one of the gaps on both sides formed by the rotating body and the fixing portion.
Dryer. With the housing
A drum rotatably provided inside the housing and accommodating an object to be dried,
A microwave irradiation unit that irradiates the object to be dried in the drum with microwaves,
Equipped with
The shield portion for suppressing the leakage of the microwave from the housing to the outside is at least the said from the gap between the rotating body which is a part of the drum and the fixed part which is a part of the housing. It is configured to include a gap shield to suppress microwave leakage.
In the gap shield portion, the fixed portion is sandwiched by the rotating body, and the fixed portion is sandwiched between the rotating bodies.
A microwave shield is provided in at least one of the gaps on both sides formed by the rotating body and the fixing portion.
A rotation support portion that rotatably supports the rotating body to the fixing portion is provided in at least one of the gaps on both sides formed by the rotating body and the fixing portion.
Dryer. The gap shield portion includes the microwave shield in one of the gaps composed of the fixed portion and the rotating body, and the rotation support portion in the other of the gaps composed of the fixed portion and the rotating body. Prepare, prepare
The dryer according to claim 1 or 2. The gap shield portion includes the microwave shield and the rotation support portion in one of the gaps composed of the fixed portion and the rotating body.
The dryer according to claim 1 or 2. The microwave shield is provided on the side of the rotation support portion that leads to the inside of the rotating body in the gap formed by the fixing portion and the rotating body.
The dryer according to any one of claims 1 to 4. The dryer according to any one of claims 1 to 5, wherein the gap shield portion further includes a seal portion that seals a gap between the fixed portion and the rotating body. The seal portion is arranged on the side of the microwave shield that leads to the inside of the rotating body in the gap formed by the fixing portion and the rotating body.
The dryer according to claim 6. The rotation support portion has conductivity so that the fixed portion and the rotating body can be made conductive.
The dryer according to any one of claims 1 to 7.

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