WO2022004107A1

WO2022004107A1 - Dryer

Info

Publication number: WO2022004107A1
Application number: PCT/JP2021/016493
Authority: WO
Inventors: 大輔鈴木; 誠西村
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2020-07-03
Filing date: 2021-04-23
Publication date: 2022-01-06
Also published as: JP2022013330A; CN115038834A

Abstract

A drum-type dryer 60 is provided with: a housing 1; a drum 3 that is provided rotatably inside the housing 1 and that accommodates objects to be dried; and a microwave irradiation part 30 that irradiates with microwaves the objects to be dried inside the drum 3. A shield part for preventing leakage of microwaves from the housing 1 is configured so as to at least include the drum 3.

Description

Dryer

This disclosure relates to a dryer that dries 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, the lower opening, and the upper opening to prevent leakage of the high-frequency electromagnetic wave and dry the high-frequency electromagnetic wave heating type. The drying parts of the machine are installed in the lower opening, and the inner surface of the water storage tank is provided with a metal surface to improve the heating efficiency, and air is blown using the air passage to improve the drying efficiency, and the air containing moisture is released. Cool in a water tank, condense, and expel dry air.

Japanese Unexamined Patent Publication No. 2001-293281

The dryer rotates the tank containing the object to be dried during drying in order to improve the drying efficiency. Therefore, there is a need for technology that suppresses the leakage of electromagnetic waves even when the tank is rotating.

The present disclosure provides a technique for suppressing 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 portion for suppressing leakage of microwaves from the housing is configured to include at least a drum.

According to the dryer of the present disclosure, leakage of electromagnetic waves when drying an object to be dried can be suppressed by irradiating with electromagnetic waves.

Schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the first embodiment. Schematic cross-sectional view schematically showing the configuration of the drum type dryer according to the first embodiment. Schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the second embodiment. Schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the third embodiment. Schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the fourth embodiment. Schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the fifth embodiment. Schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the sixth embodiment. Schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the seventh 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. 1A and 1B.

[1-1. composition]
FIG. 1A is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the first embodiment. FIG. 1B 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, an air circulation device for promoting drying may be provided.

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.

Inside the housing 1 of the drum type dryer 60, a drum 3 for accommodating an object to be dried such as clothes is rotatably provided as a rotating body. 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.

The drive motor 6 is attached below the drum 3. The drive motor 6 rotates the belt 15 while the object to be dried is being dried. As a result, the drum 3 is rotated in the forward direction or the reverse direction around the rotation axis 14.

An opening 19 and a door body 5 for opening and closing the opening 19 are provided at a position facing the opening end of the drum 3 on the front surface of the housing 1. By opening the door body 5, the user can put in and take out the object to be dried with respect to 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.

The communication section 26 is provided with a microwave irradiation section 30, a waveguide 34, and a microwave irradiation port 32. The microwave irradiation unit 30 constituting the heating unit for heating the object to be dried irradiates the inside of the drum 3 with microwaves from the microwave irradiation port 32 via the waveguide 34, and is contained in the object to be dried in the drum 3. Heat the water to be made. Since the microwave irradiation unit 30 and the waveguide 34 are provided in the communication unit 26, vibration of the microwave irradiation unit 30 and the waveguide 34 can be suppressed even if the drum 3 is rotated during drying. 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. The electromagnetic wave is not limited to the 2.45 GHz band assigned as the ISM (Industry Science 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. In order to reflect 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, and to be incident on the drum 3 again together with the microwave emitted from the microwave irradiation unit 30. Reflection portion may be provided. As a result, energy loss can be reduced and the drying time can be shortened.

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. If there is a high possibility that sparks will occur due to metal such as buttons and fasteners attached to the clothes to be dried, the output of microwaves emitted from the microwave irradiation unit 30 into the drum 3 will be reduced or stopped. Then, it may be switched to drying with a heater.

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.

In the drum type dryer 60 of the present embodiment, since the inside of 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 Notification 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 in 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 improved. Therefore, the drum 3 rotates and vibrates during drying. Therefore, the shield portion of the drum type dryer 60 of the present embodiment can suppress the microwave leaking from the gap with the fixed portion even if the shield portion of the drum type dryer 60 is irradiated with microwaves while the drum 3 is rotating. Has a structure.

Of the configurations of the drum type dryer 60 according to the first embodiment shown in FIGS. 1A and 1B, 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 is included, 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, is 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. The door body 5, the communication portion 26, or the drum 3 may be formed of a material such as a resin, and a plating layer of a conductive material may be provided on the inner surface or the outer surface. The door body 5, the communication portion 26, or the drum 3 may be formed of a material such as a 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 chokes. According to the plurality of chokes, the leakage of microwaves can be suppressed in a plurality of stages, and the performance of preventing the leakage is improved. Further, the plurality of chokes may have different dimensions or shapes of each choke, and may be composed of, for example, stepped chokes.

The first choke portion 25 may be provided in the communication portion 26 or may be provided in the drum front portion 3a. The second choke portion 27 may be provided on the door body 5 or may be provided on the communication portion 26.

In the case of the drum type dryer 60, the amount and weight of the object to be dried vary, and the weight changes between the initial stage and the end of the drying operation. Then, during the drying operation, the drum 3 rotates and vibrates, and the size of the gap between the communication portion 26 constituting the first choke portion 25 and the drum front portion 3a may change. In addition, due to the structure, dimensional variation during manufacturing is unavoidable. Furthermore, the microwave frequency may change depending on the operating conditions. Dimensional changes and manufacturing variations during operation may be taken into account when changing the dimensions or shape of the step choke. Further, the case where the frequency of the microwave changes depending on the operating condition may be considered. Therefore, according to the step choke, the performance of preventing the leakage of microwaves is further improved. As described above, in the drum type dryer 60, the leakage prevention structure having a plurality of stages is extremely effective.

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 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.

[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 drying, the control device 20 starts the drying operation. The control device 20 drives the drive motor 6 to rotate the drum 3. An air circulation device (not shown) may be operated. The control device 20 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.

[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, and a shield unit for suppressing leakage of microwaves from the housing 1 are configured to include at least a drum 3. As a result, even if the drum 3 is rotated and the inside of the drum 3 is irradiated with the microwave, the leakage of the microwave to the outside of the housing 1 can be suppressed.

Further, in the present embodiment, the drum type dryer 60 is provided on the housing 1 and the drum 3 rotatably provided inside the housing 1 to accommodate the drying target, and the drying target in the drum 3. A microwave irradiation unit 30 for irradiating microwaves and a shield portion for suppressing leakage of microwaves from the housing 1 are provided with at least microwave leakage from a gap between a rotating body and a fixed portion. It may be configured to include a gap shield portion for suppressing the above. As a result, it is possible to suppress the leakage of microwaves to the outside of the housing 1.

Further, in the present embodiment, the drum type dryer 60 includes a door body 5 that opens and closes an opening 19 provided in the housing for taking in and out the object to be dried with respect to the drum 3, and the shield portion is a shield portion. It may be configured to include the door body 5 and a gap shield portion for suppressing leakage of microwaves from the gap between the door body 5 and the drum 3. As a result, it is possible to suppress the leakage of microwaves from the gap between the door body 5 provided facing the drum opening 3c and the drum 3, so that it is easy to put in and take out the object to be dried (usability). ) And microwave leakage suppression can be achieved at the same time.

Further, in the present embodiment, the drum type dryer 60 is provided between the opening 19 and the drum 3, and includes a communication portion 26 fixed to the housing 1, and the shield portion is the communication portion 26 and the communication portion 26. It may be configured to include a gap between the door body 1 and the communication portion 26, and a gap shield portion for suppressing leakage of microwaves from the gap between the communication portion 26 and the drum 3. As a result, it is possible to suppress the leakage of microwaves to the outside of the housing 1.

Further, in the present embodiment, the gap shield portion may be configured in one stage. As a result, it is possible to suppress the leakage of microwaves to the outside of the housing 1.

Further, in the embodiment, the gap shield portion may include at least one non-contact type microwave shield. This makes it possible to reduce wear, deterioration, breakage, and the like due to the rotation of the drum 3.

Further, since the drum type dryer 60 of the first embodiment evaporates the moisture contained in the object to be dried by the microwave, the efficiency of drying can be improved. Further, the drum type dryer 60 of the first embodiment can take a large internal volume of the drum 3 and can dry many objects to be dried, so that the convenience of the user can be improved. .. Further, since the drum type dryer 60 of the first embodiment does not need to provide a fixed tank or the like for shielding microwaves on the outside of the drum 3, the number of parts can be reduced and the manufacturing cost can be reduced. be able to. Further, in the drum type dryer 60 of the first embodiment, the drum 3 usually formed of metal in the conventional product is used as a shield portion, and the housing 1 can be formed of an inexpensive material such as resin. The manufacturing cost can be reduced.

(Embodiment 2)
Hereinafter, the second embodiment will be described with reference to FIG.

FIG. 2 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the second embodiment. The drum type dryer 60 of the second embodiment includes a second gap shield portion 28 in addition to the configuration of the drum type dryer 60 of the first embodiment shown in FIGS. 1A and 1B. Other configurations, operations, and effects are the same as in the first embodiment. The points different from the first embodiment will be mainly described.

The second gap shield portion 28 is provided in the gap between the communication portion 26 and the drum front portion 3a in addition to the first choke portion 25 which is the first gap shield portion. The second gap shield portion 28 may be a reflection type microwave shield or an absorption type microwave shield. By providing a plurality of stages of microwave shields in the gap between the communication portion 26 and the drum front portion 3a, the leakage of microwaves can be further suppressed.

When an absorption type microwave shield is provided as the second gap shield portion 28, it is preferable that the second gap shield portion 28 is provided outside the first choke portion 25. As a result, it is possible to prevent the second gap shield portion 28 from being damaged or deteriorated by being heated by the microwave.

Three or more gap shield portions may be provided in the gap between the communication portion 26 and the drum front portion 3a. In this case as well, it is preferable that the innermost gap shield portion is a reflective microwave shield. As a result, even when an absorption-type microwave shield is provided as the gap shield portion outside the second stage, it is possible to prevent the microwave shield from being damaged or deteriorated by being heated by the microwave. can. The gap shield portion outside the second stage may be a reflection type microwave shield or an absorption type microwave shield.

As described above, in the present embodiment, the gap shield portion is composed of a plurality of stages. As a result, the leakage of microwaves can be further suppressed.

(Embodiment 3)
Hereinafter, the third embodiment will be described with reference to FIG.

FIG. 3 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the third embodiment. The drum type dryer 60 of the third embodiment includes a seal portion 29 in addition to the configuration of the drum type dryer 60 of the first embodiment shown in FIGS. 1A and 1B. Other configurations, operations, and effects are the same as in the first embodiment. The points different from the first embodiment will be mainly described.

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.

The seal portion 29 is preferably provided on the outside of the first choke portion 25. As a result, it is possible to prevent the seal portion 29 from being damaged or deteriorated by being heated by microwaves.

The seal portion 29 may also serve as the second gap shield portion 28 described in the second embodiment. In this case, the seal portion 29 may be made of a dielectric or the like that absorbs microwaves. As a result, the number of parts of the drum type dryer 60 can be reduced, and the manufacturing cost can be reduced.

As described above, in the present embodiment, the drum type dryer 60 includes a seal portion 29 that seals the gap between the communication portion 26 and the drum 3, and the gap between the communication portion 26 and the drum 3. The shield portion is provided inside the seal portion 29. As a result, it is possible to prevent the seal portion 29 from being damaged or deteriorated by being heated by microwaves.

Further, in the present embodiment, the one-stage gap shield portion may also serve as a seal portion, or at least one of the plurality of stages of gap shield portions may also serve as a seal portion. As a result, the number of parts of the drum type dryer 60 can be reduced, and the manufacturing cost can be reduced.

(Embodiment 4)
Hereinafter, the fourth embodiment will be described with reference to FIG.

FIG. 4 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the fourth embodiment. The drum dryer 60 of the fourth embodiment includes a ball bearing 35 in place of the first choke portion 25 of the drum dryer 60 of the first embodiment shown in FIGS. 1A and 1B. Other configurations, operations, and effects are the same as in the first embodiment. The points different from the first embodiment will be mainly described.

The ball bearing 35 is provided as a gap shield portion in the gap between the communication portion 26 and the drum front portion 3a. Since the ball bearing 35 is configured so that the communication portion 26 and the drum front portion 3a are slidably brought into close contact with each other to support the drum front portion 3a, the rotation of the drum 3 is likely to be stable. The ball bearing 35 is made of a conductive material. As a result, leakage of microwaves from the gap between the communication portion 26 and the drum front portion 3a can be suppressed.

An arbitrary type of contact type microwave shield may be provided as a gap shield portion in the gap between the communication portion 26 and the drum front portion 3a. For example, the gap shield portion may be a point-contact microwave shield such as a ball bearing, or a line-contact microwave shield such as a rolling bearing. In this case, the contact interval may be configured to be half or less of the wavelength of the microwave to be shielded. As a result, the leakage of microwaves can be further suppressed. Further, the gap shield portion may be a surface contact microwave shield such as a slide bearing. In this case, a flexible microwave shield may be provided as the gap shield portion. As a result, even if the size of the gap changes during the rotation of the drum 3, microwave leakage can be suppressed. As the lubricating oil for the bearing, a conductive lubricant may be used. As a result, the leakage of microwaves can be further suppressed.

By forming the gap shield portion with a contact-type microwave shield, it is possible to suppress microwave leakage even if there is a dimensional tolerance of the gap during assembly or a dimensional change of the gap during rotation of the drum 3. , It is possible to improve the reliability of the microwave leakage suppression performance of the gap shield portion. Further, since the gap shield portion can also serve as the seal portion 29, the number of parts of the drum type dryer 60 can be reduced, and the manufacturing cost can be reduced.

The gap shield portion may be a reflection type microwave shield made of a conductor or an absorption type microwave shield made of a dielectric material.

As described in the second embodiment, the gap shield portion may include a multi-stage microwave shield. In this case, the gap shield portion may include only the contact type microwave shield, may include only the non-contact type microwave shield, or may contain only the contact type microwave shield and the non-contact type microwave shield. Both may be included. Further, each microwave shield may be a reflection type microwave shield or an absorption type microwave shield.

As described above, in the present embodiment, the gap shield portion includes at least one contact type microwave shield. As a result, the leakage of microwaves can be further suppressed.

(Embodiment 5)
Hereinafter, the fifth embodiment will be described with reference to FIG.

FIG. 5 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the fifth embodiment. In the drum type dryer 60 of the fifth embodiment, the communication portion 26 is omitted in the configuration of the drum type dryer 60 of the first embodiment shown in FIGS. 1A and 1B. As a result, the door body 5 functions as a fixed portion with respect to the drum 3 of the rotating body. Further, the microwave irradiation unit 30 is provided on the rotation shaft of the drum 3 or the door body 5 in front of the drum opening 3c. The microwave irradiation unit 30 irradiates the drum 3 with microwaves from the microwave irradiation port 32 to heat the water contained in the object to be dried in the drum 3. Other configurations, operations, and effects are the same as in the first embodiment. The points different from the first embodiment will be mainly described.

A gap shield portion is provided in the gap between the door body 5 and the drum front portion 3a to suppress leakage of microwaves from the gap. The gap shield portion may be provided on the door body 5 or may be provided on the drum front portion 3a. The gap shield portion may be a reflection type microwave shield such as the first choke portion 25 or the second choke portion 27, or may be an absorption type microwave shield. The gap shield portion may be a non-contact type microwave shield such as the first choke portion 25 or the second choke portion 27, or may be a contact type microwave shield such as a ball bearing 35. .. The gap shield portion may be composed of one stage of microwave shield or may be composed of a plurality of stages of microwave shield. A seal portion 29 may be provided in the gap between the door body 5 and the drum front portion 3a. The seal portion 29 may also serve as a gap shield portion.

The drum type dryer 60 of the fifth embodiment can increase the dimension of the drum 3 in the depth direction by the amount of the omitted communication portion 26 and increase the internal volume.

(Embodiment 6)
Hereinafter, the sixth embodiment will be described with reference to FIG.

FIG. 6 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the sixth embodiment. In the drum dryer 60 of the sixth embodiment, in the configuration of the drum dryer 60 of the first embodiment shown in FIGS. 1A and 1B, the first choke portion 25 has a communication portion 26 and a side surface of the drum 3. It is provided between. Other configurations, operations, and effects are the same as in the first embodiment. The points different from the first embodiment will be mainly described.

The drum 3 side of the communication portion 26 is configured to cover the drum front portion 3a. A gap shield portion for suppressing leakage of microwaves from the gap is provided in the gap between the drum 3 side of the communication portion 26 and the side surface of the drum 3. The gap shield portion may be provided in the communication portion 26 or may be provided on the side surface of the drum 3. The gap shield portion may be a reflection type microwave shield such as the first choke portion 25, or may be an absorption type microwave shield. The gap shield portion may be a non-contact type microwave shield such as the first choke portion 25, or may be a contact type microwave shield such as a ball bearing 35. The gap shield portion may be composed of one stage of microwave shield or may be composed of a plurality of stages of microwave shield. A seal portion 29 may be provided in the gap between the communication portion 26 and the side surface of the drum 3. The seal portion 29 may also serve as a gap shield portion.

The drum type dryer 60 of the sixth embodiment can expand the dimension of the drum 3 in the depth direction by the amount of the gap shield moved to the side surface, and can increase the internal volume. Further, since the drum front portion 3a can be formed of a resin or the like, the manufacturing cost can be reduced.

(Embodiment 7)
Hereinafter, the seventh embodiment will be described with reference to FIG. 7.

FIG. 7 is a schematic vertical sectional view schematically showing the configuration of the drum type dryer according to the seventh embodiment. The drum type dryer 60 of the seventh embodiment includes a drum door body 36 in addition to the configuration of the drum type dryer 60 of the fifth embodiment shown in FIG. The drum door body 36 includes a second choke portion 27, which is an example of a gap shield portion provided over the entire circumference in the gap between the drum door body 36 and the drum 3. Other configurations are the same as those of the first embodiment or the fifth embodiment. The points different from the first embodiment will be mainly described.

In the drum type dryer 60 of the seventh embodiment, the drum door body 36 is fixed to the drum 3 and is configured to rotate with the rotation of the drum 3. A door body 5 is provided in the opening 19 of the housing 1. The door body 5 may or may not form a shield portion. In the former case, the microwave exposure of the user can be further reduced. In the latter case, since the door body 5 can be formed of resin or the like, the manufacturing cost of the drum type dryer 60 can be reduced.

The drum type dryer 60 of the seventh embodiment does not need to shield the gap between the rotating body and the fixed portion, and only needs to provide the second choke portion 27 on the drum door body 36. This simplifies the configuration of the gap shield portion and suppresses the leakage of microwaves to the outside of the housing 1.

As described above, in the present embodiment, the drum type dryer 60 has a door body 5 for opening and closing the opening 19 provided in the housing 1 and a drum for opening and closing the drum opening 3c provided in the drum 3. The door body 36 is provided, and the shield portion includes the drum 3 and the drum door body 36. As a result, it is possible to suppress the leakage of microwaves to the outside of the housing 1.

(Other embodiments)
As described above, embodiments 1 to 7 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 embodiments 1 to 7 to form a new embodiment.

Therefore, other embodiments will be exemplified below.

In the first to seventh 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 technology in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of the claims or the equivalent thereof.

This disclosure is available for dryers.

1 Housing 3 Drum 3a Drum front 3b Drum rear 3c Drum opening 5 Door 6 Drive motor 14 Rotating shaft 15 Belt 19 Opening 20 Control device 25 1st choke part 26 Communication part 27 2nd choke part 28th 2 Gap Shield part 29 Seal part 30 Microwave irradiation part 32 Microwave irradiation port 34 Waveguide 35 Ball bearing 36 Drum door body 60 Drum type dryer

Claims

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 leakage of the microwave from the housing is at least a dryer including the drum.
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 leakage of the microwave from the housing is configured to include at least a gap shield portion for suppressing leakage of the microwave from the gap between the rotating body and the fixed portion. Dryer.
A door body for opening and closing an opening provided in the housing for moving the object to be dried in and out of the drum is provided.
The first or second aspect of the present invention, wherein the shield portion includes a door body and a gap shield portion for suppressing leakage of microwaves from a gap between the door body and the drum. Dryer.
A communication portion provided between the opening and the drum and fixed to the housing is provided.
The shield portion is a gap shield portion for suppressing leakage of microwaves from the gap between the communication portion, the door body and the communication portion, and the gap between the communication portion and the drum. The dryer according to claim 3, which comprises.
A seal portion for sealing the gap between the communication portion and the drum is provided.
The dryer according to claim 4, wherein the gap shield portion between the communication portion and the drum is provided inside the seal portion.
The dryer according to any one of claims 2 to 5, wherein the gap shield portion is composed of one stage.
The dryer according to claim 6, wherein the one-stage gap shield portion also serves as the seal portion.
The dryer according to any one of claims 2 to 5, wherein the gap shield portion is composed of a plurality of stages.
The dryer according to claim 8, wherein at least one of the plurality of stages of the gap shield portion also serves as the seal portion.
The dryer according to any one of claims 2 to 9, wherein the gap shield portion includes at least one non-contact type microwave shield.
The dryer according to any one of claims 2 to 9, wherein the gap shield portion includes at least one contact type microwave shield.
A door body that opens and closes the opening provided in the housing, and
A drum door body that opens and closes the drum opening provided in the drum, and
Equipped with
The dryer according to claim 1, wherein the shield portion includes the drum and the drum door body.