JP2021156545A - Range hood - Google Patents

Abstract

To provide a range hood capable of saving a user the trouble of preparing a cleaning liquid close to a predetermined temperature during cleaning (maintenance).SOLUTION: When performing automatic cleaning, a cleaning liquid 8 is pumped up by a pump 10 from a storage part 9 below a range hood 1, and in the case where the cleaning liquid 8 is below a predetermined temperature, heating is started by a heating part 17, a conveyance destination of the cleaning liquid 8 is switched to a circulation flow passage 13 by a switching part 14, and the temperature of the cleaning liquid stored in the storage part 9 is increased. In the case where the cleaning liquid 8 pumped up by the pump 10 is equal to or higher than the predetermined temperature, the conveyance destination of the cleaning liquid 8 is switched to a nozzle 11 by the switching part 14, and the cleaning liquid 8 of the predetermined temperature or higher is supplied to a cleaning casing 32 from the nozzle 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to a range hood.

Conventionally, this type of range hood is equipped with an oil collecting mechanism for the purpose of collecting oil smoke, dust, etc. generated during cooking. Since dirt such as oil and dust adheres to this oil collection mechanism as it is used, the discharge performance deteriorates due to the decrease in air volume, and oil drips from the collection part, so clean the inside of the range foot regularly. I had to do it. It also requires regular cleaning of the impeller provided for exhaust as well.

For the purpose of reducing the labor of cleaning, a means for automatically purifying the oil collecting mechanism has been considered. As an automatic purification means of the oil collecting mechanism, there is a method of removing dirt by centrifugal force by attaching a driving device to the oil collecting mechanism and rotating it (see, for example, Patent Document 1).

Hereinafter, the range hood will be described with reference to FIG.

As shown in FIG. 5, the dirty air 101 containing oil smoke or the like generated by cooking or the like passes through the suction port 102 and the filter 104 arranged in the wind improving flow of the exhaust impeller 103. .. Further, by providing the drive device 105 for rotationally driving the filter 104 and the sensor 106 for detecting the dirt on the filter 104, the dirt on the filter 104 is detected, the filter 104 is rotated by the drive device 105, and oil and dust are generated. Etc. are removed by centrifugal force.

Japanese Unexamined Patent Publication No. 3-164369

In such a conventional range hood, dirt such as oil and dust is removed by centrifugal force by rotationally driving the filter 104, but it is necessary to remove the filter 104 and perform regular cleaning. At the time of cleaning, the cleaning liquid used for cleaning is preferably cleaned at a predetermined temperature (about 40 degrees), and the user has a problem that it takes time and effort to prepare a cleaning liquid close to the predetermined temperature each time. rice field.

Therefore, the present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a range hood that can save the user time and effort to prepare a cleaning liquid having a temperature close to a predetermined temperature at the time of cleaning (care). do.

Then, in order to achieve this object, the present invention heats the oil collecting part that collects the oil contained in the air, the storage part that stores the cleaning liquid for cleaning the oil collecting part, and the cleaning liquid. A heating unit, a pump for sucking up the cleaning liquid stored in the storage unit, a nozzle for blowing out the cleaning liquid sucked up by the pump to the oil collecting unit, and a nozzle for transporting the cleaning liquid to the nozzle. The cleaning flow path, the circulation flow path for transporting the cleaning liquid passing through the cleaning flow path to the storage unit, the switching unit for switching the transport destination of the cleaning liquid to the nozzle or the circulation flow path, and the switching. The control unit includes a control unit that controls the switching operation of the transfer destination of the cleaning liquid by the unit, and a temperature measurement unit that is installed near the cleaning flow path or the circulation flow path and measures the temperature. Based on the temperature measured by the temperature measuring unit, the range hood is configured so that the transport destination of the cleaning liquid can be switched to the nozzle or the circulation flow path, thereby achieving the intended purpose.

According to the present invention, by providing a heating unit for heating the cleaning liquid pumped from the storage unit, even if water at room temperature is put into the storage unit and automatic cleaning is started, the oil collection mechanism unit is close to a predetermined temperature. Since cleaning can be performed with a cleaning liquid, it is possible to obtain the effect that the user's labor for preparing a cleaning liquid close to a predetermined temperature can be saved.

Cross-sectional configuration view of the range hood according to the embodiment of the present invention as viewed from the side Cross-sectional configuration view of the range hood according to the embodiment of the present invention as viewed from the front Perspective view showing the structure of the centrifugal fan of the range hood according to the embodiment of the present invention. Flowchart for determination of control unit Side sectional view showing a conventional range hood

The range hood of the present invention stores an oil collecting part that collects oil contained in air, an oil collecting part that collects oil contained in air, and a cleaning liquid for cleaning the oil collecting part. A unit, a heating unit that heats the cleaning liquid, a pump that sucks up the cleaning liquid stored in the storage unit, a nozzle for blowing out the cleaning liquid sucked up by the pump to the oil collecting unit, and the cleaning liquid. The cleaning flow path for transporting the cleaning liquid to the nozzle, the circulation flow path for transporting the cleaning liquid passing through the cleaning flow path to the storage unit, and the transport destination of the cleaning liquid are switched to the nozzle or the circulation flow path. A switching unit for this purpose, a control unit that controls the switching operation of the transfer destination of the cleaning liquid by the switching unit, and a temperature measuring unit that is installed near the cleaning flow path or the circulation flow path and measures the temperature. The control unit has a configuration in which the transfer destination of the cleaning liquid is switched to the nozzle or the circulation flow path based on the temperature measured by the temperature measuring unit. With this configuration, by providing a heating unit that heats the cleaning liquid pumped up from the storage unit, even if water at room temperature is put into the storage unit and automatic cleaning is started, the oil collection mechanism unit can be cleaned with a cleaning liquid close to a predetermined temperature. Since it can be washed, it is possible to save the user's trouble of preparing a cleaning liquid having a temperature close to a predetermined temperature.

Further, the control unit may be configured to switch the transport destination of the cleaning liquid to the circulation flow path when it is determined that the temperature is lower than the predetermined temperature. As a result, when the cleaning liquid is lower than the predetermined temperature, the cleaning liquid is not conveyed to the cleaning flow path and continues to circulate through the circulation flow path, so that the user prepares the cleaning liquid at the predetermined temperature in advance.

Further, the control unit may be configured to switch the transport destination of the cleaning liquid to the nozzle when it is determined that the temperature is equal to or higher than a predetermined temperature. As a result, when the cleaning liquid is at a predetermined temperature or higher, the cleaning liquid is conveyed to the nozzle, so that the oil collecting portion can be cleaned at the same temperature as when the cleaning liquid having a predetermined temperature is prepared in advance by the user.

Further, the control unit may be configured to start heating the cleaning liquid by the heating unit when the destination of the cleaning liquid is switched to the circulation flow path. As a result, the cleaning liquid having a temperature lower than the predetermined temperature is heated. Therefore, even when the cleaning liquid having a low temperature is put in the storage unit, the oil collecting unit is at the same temperature as the state in which the user prepares the cleaning liquid having a predetermined temperature in advance. Can be washed.

Further, the heating unit may be provided in the cleaning flow path or the circulation flow path. As a result, the cleaning liquid is heated during transportation, so that the time required to start cleaning the oil collecting portion can be shortened as compared with the case where the cleaning liquid stored in the storage portion is heated and then transported. ..

Further, the control unit may be configured to switch the transport destination of the cleaning liquid to the nozzle or the circulation flow path after a predetermined time has elapsed from the start of heating of the cleaning liquid by the heating unit. As a result, the transfer destination is automatically switched after a predetermined time has elapsed, so that the temperature measurement of the cleaning liquid can be omitted, and the time from the temperature measurement to the start of cleaning the oil collecting portion is compared with the case of switching. Can be shortened.

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

(Embodiment 1)
The range foot of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is a cross-sectional configuration diagram of the range hood of the present invention viewed from the side, FIG. 2 is a cross-sectional configuration diagram of the range hood of the present invention viewed from the front, and FIG. 3 is a perspective view showing the structure of a centrifugal fan.

As shown in FIGS. 1 and 2, the range hood 1 is installed by fixing the rear of the range hood 1 main body to the kitchen room wall 20 with screws above the kitchen utensil 2 such as a stove. The range hood 1 is provided with a flat plate-shaped square suction box plate 19 having a cavity 18. Then, on the front side of the suction box plate 19, that is, the side on which the cook stands (on the left side in FIG. 1), steam, smoke, oil smoke, etc. generated when cooking from the kitchen utensil 2 (for example, a pot, a frying pan, etc.) A suction port 3 for sucking in the surrounding air 25 containing dust and the like floating in the surroundings is provided. An exhaust port 4 that communicates with the outside via a duct 26 is provided on the top surface of the range hood 1, and is attached to the electric motor 5 (motor) and the rotating shaft 31 of the electric motor 5 as a blower 30 inside the range hood 1. A centrifugal fan 6 and a cleaning casing 32 including the centrifugal fan 6 are arranged, and a ventilation passage 33 connecting the suction port 3 and the exhaust port 4 is formed via the centrifugal fan 6. The centrifugal fan 6 may be a sirocco fan or a turbo fan, and the electric motor 5 may be an AC motor or a DC motor.

A tray storage unit 34 having a box-shaped opening (not shown) having an opening at the top is provided so as to project from the lower surface of the range hood 1 at a position corresponding to the lower part of the cleaning casing 32. A storage unit 9 for storing the cleaning liquid 8 for cleaning the centrifugal fan 6 and a drain tray 35 for receiving drainage after cleaning the centrifugal fan 6 can be detachably stored via a partition wall. The storage unit 9 and the drain tray 35 are each provided with a lid (not shown) so that the cleaning liquid 8 does not easily spill when attached / detached. The cleaning liquid 8 is water (including hot water) or an aqueous solution containing cleaning components, and the method of attaching / detaching the storage unit 9 and the drain tray 35 may be the method conventionally disclosed.

The lid of the storage portion 9 is partially opened, and one of the suction tubes 36 is inserted from the upper portion of the opening of the lid. The other end of the suction tube 36 is connected to the pump 10 and is connected to the nozzle 11 disposed in the cleaning casing 32 from the pump 10 via the suction tube 37. The flow path from the suction tube 36 to the nozzle 11 is referred to as a cleaning flow path 12.

A switching portion 14 is provided on the flow path of the cleaning flow path 12. The switching unit 14 switches whether to transport the cleaning liquid 8 in the cleaning flow path 12 to the nozzle 11 or to the circulation flow path 13 for returning the cleaning liquid 8 in the cleaning flow path 12 to the storage unit 9 again. The switching unit 14 is composed of a solenoid valve or the like using a solenoid, and its switching operation is controlled by a control unit 15 described later. In addition, one of the circulation flow paths 13 is connected to the switching unit 14, and the other is a tube inserted into the storage unit 9.

A temperature measuring unit 16 for directly measuring (including predicting) the temperature of the cleaning liquid 8 or indirectly measuring (including predicting) the temperature of the cleaning liquid 8 is provided in the vicinity of the cleaning flow path 12 or the circulation flow path 13, and the control unit 15 is provided. Controls the switching unit 14 based on the temperature measured by the temperature measuring unit 16 to switch the transport destination of the cleaning liquid 8 to the nozzle 11 or the circulation flow path 13. The temperature measuring unit 16 may be installed anywhere as long as the temperature of the cleaning liquid 8 can be measured, and is preferably installed on the pump 10 side or the circulation flow path 13 of the switching unit 14 on the cleaning flow path 12. prepare.

Further, a heating unit 17 is provided on the flow path of the cleaning flow path 12. The heating unit 17 is provided on the pump 10 side of the switching unit 14, and heats the cleaning liquid 8. The heating unit 17 may be a plate heater or the like, but is not particularly limited as long as it is a mechanism capable of heating the cleaning liquid 8 without harming other mechanisms, and is controlled by the control unit 15 described later. In the present embodiment, the heating unit 17 is arranged on the pump 10 side of the switching unit 14 on the cleaning flow path 12, but it may also be provided on the circulation flow path 13.

The cleaning casing 32 is provided with the centrifugal fan 6 shown in FIG. The centrifugal fan 6 is composed of a plurality of blades 24, and a plurality of ring-shaped oil collecting portions 7 are attached to the inside of the centrifugal fan 6 at regular distance intervals. When the electric motor 5 is operated while the surrounding air 25 containing steam, smoke, oil smoke, dust floating around, etc. generated during cooking is generated, the centrifugal fan 6 rotates and the air 25 is sucked in. When sucked from the mouth 3 and passed through the centrifugal fan 6 through the ventilation passage 33, oil and dust collide with the ring-shaped oil collecting portion 7 and are collected, and the air from which they are removed is used as a cleaning casing. After passing through the inside of 32, it is discharged to the outside through the exhaust port 4 and the duct 26. When this is repeated, oil and dust are accumulated in the blade 24 of the centrifugal fan 6 and the oil collecting portion 7, causing clogging and reducing the exhaust air volume. The blade 24 and the oil collecting portion 7 are cleaned in order to prevent a decrease in the exhaust air volume. The blade 24 and the oil collecting unit 7 are used as an oil collecting mechanism unit.

The control unit 15 controls the entire range hood 1, is composed of a CPU, a memory, and the like, and controls based on a program stored in advance.

Next, the automatic cleaning operation will be described.

The storage unit 9 (refueling tray) is taken out from the tray storage unit 34. Next, the lid of the storage unit 9 is opened, a specified amount of the cleaning liquid 8 is put into the storage unit 9, and the lid of the storage unit 9 is closed. Next, the storage unit 9 containing the cleaning liquid 8 is set in the tray storage unit 34. At that time, it is assumed that the suction tube 36 and the circulation flow path 13 tube are set in the storage unit 9. Then, the drainage tray 35 is set in the tray storage unit 34 in an empty state.

Next, when the cleaning switch (not shown) on the front of the range hood 1 main body is pressed, the drain valve 39 that opens and closes the drain port 38 at the bottom of the cleaning casing 32 is closed according to the operation instruction from the control unit 15, and the pump is pumped. The cleaning liquid 8 in the storage unit 9 is pumped by 10 and conveyed to the nozzle 11, supplied from the nozzle 11 into the cleaning casing 32, and stored in water. As a result, a part of the blade 24 of the centrifugal fan 6 and the oil collecting portion 7 is immersed in the cleaning liquid 8 in the cleaning casing 32. By operating the electric motor 5 at the same time, the centrifugal fan 6 rotates, and the blade 24 and the oil collecting unit 7 are cleaned while rotating.

Then, after cleaning for a certain period of time (for example, about 10 minutes), the drain valve 39 is opened, and the cleaned cleaning liquid 8 in the cleaning casing 32 is discharged from the drain port 38 to the drain tray 35. The drain port 38 and the drain tray 35 may be configured so that the cleaning liquid 8 after cleaning can be directly discharged from the drain port 38 to the drain tray 35, or a drain tube may be used between the drain port 38 and the drain tray 35. good.

Next, even if water at room temperature is put into the storage unit 9 and automatic cleaning is started, which is a feature of the present invention, the centrifugal fan 6 (oil collection mechanism unit) can be cleaned with a cleaning liquid close to a predetermined temperature. The control will be described with reference to the flowchart of FIG.

The control unit 15 controls based on the flowchart of FIG. 4 stored in advance.

In S1, when the user puts the cleaning liquid 8 (water) at room temperature into the storage unit 9 and sets it in the tray storage unit 34, in S2, the pump 10 is operated and stored in the storage unit 9. Pump up the cleaning liquid 8.

In S3, the heating unit 17 is operated to heat the cleaning liquid 8.

In S4, the temperature measuring unit 16 measures (including predicting) the temperature of the cleaning liquid 8, and the temperature of the cleaning liquid 8 is 40, which is higher than the melting point of animal fat, which is higher than the melting point of vegetable oil. Degree) or more is judged. If it is determined that the temperature is lower than the predetermined temperature, the process proceeds to S5, the switching unit 14 is switched and controlled so that the cleaning liquid 8 is conveyed to the circulation flow path 13, and the process proceeds to S6 to return the cleaning liquid 8 to the storage unit 9.

By the operation of S2 to S6, the cleaning liquid 8 is gradually heated.

Further, in S4, when it is determined that the temperature of the cleaning liquid 8 is equal to or higher than the predetermined temperature, the process proceeds to S7, and the switching unit 14 is switched and controlled so that the cleaning liquid 8 is conveyed to the nozzle 11 via the cleaning flow path 12. do. At this time, the operation of the heating unit 17 is stopped. Next, in S8, the cleaning liquid 8 having a temperature equal to or higher than a predetermined temperature is supplied from the nozzle 11 into the cleaning casing 32 and stored in water. If the temperature drops while the cleaning liquid 8 having a predetermined temperature or higher is being conveyed through the cleaning flow path 12, the temperature lowered in advance is set to a higher temperature (for example, 50 degrees or higher) in S4, taking into account the lowered temperature. Etc.).

By the operation of S7 to S8, the blade 24 of the centrifugal fan 6 and the oil collecting portion 7 can be cleaned with the cleaning liquid 8 having a predetermined temperature or higher.

With the above configuration, by providing a heating unit 17 (heater) in the middle of the cleaning flow path 12, oil can be collected even if normal temperature water is put into the storage unit 9 (fueling tray) and automatic cleaning is started. Since the mechanical portion can be cleaned with the cleaning liquid 8 having a predetermined temperature or higher, the user's labor for preparing the cleaning liquid 8 having a predetermined temperature can be saved.

Further, since the heating unit 17 is provided in the cleaning flow path 12 or the circulation flow path 13 to heat the cleaning liquid 8 during transportation, the cleaning liquid 8 stored in the storage unit 9 is heated and then pumped up and transported. Compared with the case, the time until the cleaning of the oil collecting unit mechanism is started can be shortened.

The present embodiment is not limited to the above. For example, in S5, when the switching unit 14 switches and controls the cleaning liquid 8 to be conveyed to the circulation flow path 13, the heating unit 17 You may want to start heating with. Further, the heating unit 17 may be provided in the cleaning flow path 12 or the circulation flow path 13. With this configuration, the cleaning liquid 8 is heated during transportation, so that the cleaning of the oil collecting mechanism is compared with the case where the cleaning liquid 8 stored in the storage unit 9 such as a tank is heated and then sucked up by a pump and transported. The preparation time (time to start) can be shortened. Further, the control unit 15 does not compare with the predetermined temperature in S4, but switches the switching unit 14 to the circulation flow path 13 side for a predetermined predetermined time, heats the cleaning liquid 8, and then causes the cleaning liquid 8. After a lapse of a predetermined time, the destination of the cleaning liquid 8 may be switched to the nozzle 11. With this configuration, since the transport destination of the cleaning liquid 8 is automatically switched after a lapse of a predetermined time, the temperature measurement of the cleaning liquid 8 can be omitted, the temperature measuring unit 16 can be omitted, and the temperature is measured. It is possible to shorten the cleaning preparation time (time until the start) of the oil collecting unit mechanism as compared with the case of switching after the operation.

Although the range hood according to the present invention has been described above based on the present embodiment, the present invention is not limited to the present embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are applied to the present embodiment, and a form constructed by combining components in different embodiments is also included in the scope of the present invention. ..

The present invention can be applied to a ventilation device having an automatic cleaning function.

1 Range hood 2 Kitchen hood 3 Suction port 4 Exhaust port 5 Electric fan 6 Centrifugal fan 7 Oil collection unit 8 Cleaning liquid 9 Storage unit 10 Pump 11 Nozzle 12 Cleaning flow path 13 Circulation flow path 14 Switching unit 15 Control unit 16 Temperature measurement unit 17 Heating part 18 Cavity 19 Suction box plate 20 Room wall 24 Blade 25 Air 26 Duct 30 Blower 31 Rotating shaft 32 Cleaning casing 33 Ventilation passage 34 Tray storage 35 Drain tray 36 Suction tube 37 Suction tube 38 Drain port 39 Drain valve

Claims (6)

An oil collection unit that collects oil contained in the air,
A storage unit for storing the cleaning liquid for cleaning the oil collecting unit, and a storage unit.
A heating unit that heats the cleaning liquid and
A pump that sucks up the cleaning liquid stored in the storage unit,
A nozzle for blowing out the cleaning liquid sucked up by the pump to the oil collecting portion, and
A cleaning flow path for transporting the cleaning liquid to the nozzle, and
A circulation flow path for transporting the cleaning liquid passing through the cleaning flow path to the storage unit, and
A switching unit for switching the transport destination of the cleaning liquid to the nozzle or the circulation flow path, and
A control unit that controls the switching operation of the destination of the cleaning liquid by the switching unit,
It is provided with a temperature measuring unit which is installed in the vicinity of the cleaning flow path or the circulation flow path and measures the temperature.
The control unit
A range hood that switches the transport destination of the cleaning liquid to the nozzle or the circulation flow path based on the temperature measured by the temperature measuring unit. The control unit
The range hood according to claim 1, wherein when it is determined that the temperature is lower than a predetermined temperature, the destination of the cleaning liquid is switched to the circulation flow path. The control unit
The range hood according to claim 1, wherein when it is determined that the temperature is equal to or higher than a predetermined temperature, the destination of the cleaning liquid is switched to the nozzle. The control unit
The range hood according to claim 2 or 3, wherein when the destination of the cleaning liquid is switched to the circulation flow path, the heating unit starts heating the cleaning liquid. The heating part is
The range hood according to claim 4, which is provided in the cleaning flow path or the circulation flow path. The control unit
The range hood according to claim 4 or 5, wherein the destination of the cleaning liquid is switched to the nozzle or the circulation flow path after a predetermined time has elapsed from the start of heating the cleaning liquid by the heating unit.

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