CN220318205U - Drying machine - Google Patents

Abstract

A dryer (20) has a housing (21), a gas-fired hot gas device (10) in the housing (21), and a drum (22). The gas-fired hot gas device (10) has a gas burner (100) and a hood (200) surrounding the gas burner (100). The shroud (200) has a plurality of air inlets or perforations (210) for air to enter and support combustion of the gas burner (100) and an air outlet (220) for exhaust gas to exit. The gas-fired hot gas device (10) is arranged to supply such exhaust gas into the drum (22) to dry the contents of the drum (22).

Description

Drying machine

Technical Field

The present utility model relates to a dryer comprising a gas-fired hot gas device for drying.

Background

In a clothes dryer or a washing machine having a drying function, laundry is dried by a heater or hot air generated by the heater, and in most cases, the heater is driven by electricity. The use of a gas burner to generate hot air for drying purposes is not an unattractive proposal because gas heating is generally relatively inexpensive, because gas is inexpensive, and gas heaters are capable of heating air using less energy than electric heaters. In addition, the air can be heated more quickly. However, incomplete combustion is a problem, and space is also a problem with respect to the size of the gas combustion device.

The present utility model seeks to mitigate or at least alleviate such problems and disadvantages by providing a new or otherwise improved dryer comprising a gas-fired hot gas device.

Disclosure of Invention

According to the present utility model, there is provided a dryer comprising a housing, a gas-fired hot gas device in the housing, and a drum. The gas-fired hot gas device includes a gas burner and a shroud surrounding the gas burner. The hood has a plurality of air inlets for air to enter and support combustion of the gas burner and at least one air outlet for exhaust gas to exit. The gas-fired hot gas device is arranged to supply said exhaust gas into the drum to dry the contents of the drum.

Preferably, the gas-fired hot gas device is located on the lateral side of the drum.

Preferably, the dryer is provided by a washing machine having a drying function and including a washing mechanism incorporating a drum for washing, the washing machine sharing a housing.

Preferably, the dryer includes an exhaust passage extending from the drum to an outside of the housing for exhausting the exhaust gas.

It is further preferred that the exhaust passage comprises a fan arranged to drive exhaust gases for discharge.

It is further preferred that the dryer includes a lint trap connected to and in communication with the exhaust passage for discharging exhaust gas.

In a preferred embodiment, the air inlet openings are each substantially smaller than the at least one air outlet opening.

Preferably, the air inlet comprises perforations.

More preferably, the perforations are of one or more predetermined dimensions and adjacent perforations are spaced apart at one or more predetermined intervals to achieve optimal combustion of the gas burner to achieve complete combustion and to achieve acceptably low levels of carbon monoxide.

More preferably, the perforations have a predetermined arrangement in terms of shape and size and mutual spacing to achieve optimal combustion of the gas burner to achieve complete combustion and to obtain acceptably low levels of carbon monoxide.

More preferably, the perforations have a width of a certain dimension and adjacent perforations are spaced apart from each other by the same distance of the certain dimension.

Even more preferably, the specific dimension is substantially 2.5mm or 0.125 inches.

Preferably, the perforations comprise circular holes.

Preferably, the perforations have the same shape and size.

In a preferred embodiment, the gas burner has a central axis about which the shroud extends to enclose the gas burner.

More preferably, the cap has a central axis coinciding with the central axis of the gas burner.

More preferably, the shroud has a length and a uniform cross-section along at least a portion of its length.

Even more preferably, the cap has a sleeve-like or cylindrical shape.

Preferably, the gas burner has a plurality of gas outlet holes facing in the same direction parallel to the central axis of the gas burner.

Preferably, the cover has an open end remote from the gas burner, the open end being fully open to provide the at least one gas outlet.

Preferably, the cover defines a combustion zone in which the gas burner burns.

Preferably, the gas burner comprises an ignition electrode and a flame sensor, both of which are arranged within the housing.

In a preferred embodiment, the gas burner and the hood are connected together at their respective rear ends via a support.

More preferably, the support is provided as an end plate of the cover, to which the rear end of the gas burner is connected.

Preferably, the gas-fired hot gas device comprises a housing enclosing the other above-mentioned parts of the gas-fired hot gas device, the front end of the housing being provided with a nozzle for diverting exhaust gases leaving the hood.

It is further preferred that the nozzle has a flat cross section to diffuse the exhaust gases.

Drawings

The utility model will now be described more particularly, by way of example only, with reference to the accompanying drawings, in which:

fig. 1 is an exploded perspective view of a gas-type hot gas appliance used in an embodiment of a dryer according to the present utility model, particularly illustrating a housing and a hood of the gas-type hot gas appliance;

FIG. 2 is a perspective view of the gas-fired hot gas device of FIG. 1 with the housing omitted to expose the cover;

FIG. 3 is a perspective view similar to FIG. 2 with the cover partially broken away to expose the gas burner therein;

FIG. 4 is a side view of the cover and gas burner of FIG. 3, partially cut away;

FIG. 5 is an enlarged view of a portion of the cover of FIG. 4; and is also provided with

Fig. 6 is a schematic perspective view of a dryer incorporating the gas-fired hot gas device of fig. 1.

Detailed Description

Referring first to fig. 1-5 of the drawings, there is shown a gas-fired hot gas device 10 of a dryer embodying the present utility model (fig. 6). The gas-fired hot gas device 10 comprises a gas burner 100 and a shroud 200 surrounding the gas burner 100. The gas burner 100 and the cover 200 may be installed horizontally. The shroud 200 has a plurality of air inlets 210 for air to enter and support combustion of the gas burner 100 and at least one air outlet 220 for exhaust gas to exit. The shroud 200 has an open front end remote from the gas burner 100. The open end is fully open to provide the at least one air outlet 220. In this particular embodiment, there is only one of the air outlets 220. It is contemplated that the air outlet 220 may be divided into two or more openings by a strip or spoke extending to the opening, which provides enhanced rigidity to the open end of the cover 200.

The gas burner 100 has a horizontal central axis B about which the shroud 200 extends to enclose the gas burner 100. The shroud 200 defines a combustion zone within which the gas burner 100 burns. The gas burner 100 has a plurality of nozzles 101, all facing in the same direction parallel to the central axis B of the gas burner 100. The gas burner 100 includes ignition electrodes 110 and flame sensors 120, which are disposed on opposite sides of the gas burner 100 and are both within a housing 200.

The cap 200 has a sleeve-like or cylindrical shape of circular cross-section and thus has a length and a uniform cross-section along at least a portion of its length. The shroud 200 has a horizontal central axis S that coincides with the central axis B of the gas burner 100.

The gas burner 100 is supported by a support 300. The mount 300 has a generally circular base plate 310 and a collar 320 of relatively small diameter on the inside of the base plate 310. The rear end of the gas burner 100 is coaxially fixed on the inner side of the bottom plate 310. Ignition electrode 110 and flame sensor 120 are also secured to base plate 310, extending inwardly through their respective apertures. The rear end of the cap 200 is mounted over and around the collar 320, thereby surrounding the gas burner 100 and the ignition electrode 110 and flame sensor 120.

In short, the gas burner 100 and the cover 200 are connected together at their respective rear ends via the mount 300. The support 300 is provided with a base 310 as an end plate of the cover 200 to which the rear end of the gas burner 100 is connected.

The gas-fired hot gas device 10 comprises a housing 400 (fig. 1) that encloses the other above-mentioned parts of the gas-fired hot gas device 10, namely the gas burner 100, the ignition electrode 110 and the flame sensor 120, the hood 200 and the support 300. The housing 400 is formed of two half-shells, an upper half-shell 410 and a lower half-shell 420, which are connected together by screws. The housing 400 is just large enough to accommodate these parts. The rear end of the housing 400 is open to accommodate the bottom plate 31 and is slightly larger to allow fresh air to enter. The slightly larger diameter of the bottom plate 310 compared to the shroud 200 ensures an annular space around the shroud 200 to allow air to move to the air inlet 210 and through the air inlet into the shroud 200 to support combustion of the gas burner 100.

The front end of the housing 400 is provided with or forms a spout 430 that is bent 90 ° for diverting exhaust gas exiting the hood 200 to exit the housing 400 in a downward direction. Spout 430 has a flat cross section to spread the exhaust gas over a relatively wide range.

During operation of the gas-fired hot gas device 10, the gas burner 100 burns and the combustion gas is ejected from the nozzle 101 at a moderate rate under the pressure of the pressurized gas supplied to the gas burner 100. The ejected combustion gases cause a hot exhaust flow (jet) to exit housing 400 via nozzle 430.

The configuration of the gas heater 10 is designed to allow for proper or controlled air flow to achieve optimal or complete combustion by installing a cylindrical perforated shroud 200 to surround the gas burner 100 and thus the flame as the gas burner burns. The design of the air inlet 210 is also a critical factor. The air inlet 210 is preferably in the form of perforations 210 that are each significantly smaller than the air outlet 220. The perforations 210 have a certain predetermined size (or a plurality of predetermined sizes) and adjacent perforations are spaced apart at a predetermined interval (or intervals) to achieve optimal combustion of the gas burner 100. From a slightly different perspective, the perforations 210 have a predetermined arrangement in terms of shape and size and are spaced apart from one another to achieve optimal combustion of the gas burner 100. In either case, the goal is to achieve complete combustion or at least to achieve acceptably low levels of carbon monoxide (CO) emissions, e.g., CO emissions meeting the european requirement of 0.1% CO free of air.

In a preferred embodiment, the perforations 210 are of the same shape and size and are circular holes. It is also preferred that the perforations 210 have a width of a particular size and that adjacent perforations 210 are spaced apart from one another (as measured from edge to edge) by a distance that is typically the same particular size. To achieve the above objective, it was found that the specific dimensions were substantially 2.5mm or 0.125 inches (fig. 5).

Reference is now made to fig. 6 which shows a dryer. The gas-fired hot air device 10 is designed for a dryer (clothes dryer) to generate a flow of hot air to dry laundry. The dryer may be a stand alone dryer or, as in the illustrated embodiment, is provided by a washing machine 20 having a drying function and including a washing mechanism for washing laundry. The gas-fired hot gas device 10 has a gas rated power of about 2.6kW and is compact enough in size to fit into the crowded interior of the washing machine 20.

The washing machine/dryer 20 shares a common housing 21 and includes a drum 22 (i.e., an inner tub) as part of a washing mechanism, which rotates to tumble laundry, clean in a cleaning mode, and then dry in a drying mode. The gas-fired hot air device 10 is installed and located at a lateral side of the drum 22 to supply hot exhaust air to the drum 22 to dry the contents, i.e., washed clothes, in the drum 22. Exhaust gas is delivered into the drum 22 by the nozzle 430 of the housing 400 of the gas-fired hot gas device.

The washing machine 20 includes an exhaust passage 30 extending from the drum 22 to the outside of the casing 21 for exhausting exhaust gas. The exhaust passage 30 is provided by a duct member 31 having a first end 31A connected to and in communication with the outlet aperture 23 of the drum 22 and a second end 31B connected to and in communication with the lint picker 24 of the washing machine 20. A centrifugal (or axial) fan 32 is provided in the first end 31A for drawing exhaust air from the interior of the drum 22 into the duct member 31 and then driving the exhaust air out of the duct member 31 into the lint picker 24 for subsequent discharge.

The lint picker 24 has a water inlet 24A for water to be fed after use, a water outlet 24B for discharging used water, and a U-shaped path 24D extending to the water inlet 24A and the water outlet 24B to catch lint in the used water. The lint picker 24 is modified to include a second water inlet 24C to which a second end 31B of the duct member is connected. The exhaust gas from the duct member 31 enters the lint picker 24 via the second water inlet 24C. The exhaust gas then passes through a U-shaped path 24D in which lint is trapped and discharged as used water to a water outlet 24B.

The present utility model is given by way of example only, and various other modifications and/or alterations to the described embodiments may be made by persons skilled in the art without departing from the scope of the utility model as specified in the appended claims.

Claims (26)

1. A dryer, characterized in that the dryer comprises:

a housing;

a gas-fired hot gas device in the housing, the gas-fired hot gas device comprising:

a gas burner; and

a cover surrounding the gas burner, the cover having a plurality of air inlets for air to enter and support combustion of the gas burner and at least one air outlet for exhaust gas to exit; and

a roller;

wherein the gas-fired hot gas device is arranged to supply the exhaust gas into the drum to dry the contents of the drum.

2. The dryer of claim 1 wherein said gas-fired hot gas assembly is located on a lateral side of said drum.

3. The dryer of claim 1 wherein said dryer is provided by a washing machine having a drying function and including a washing mechanism incorporating said drum for washing, said washing machine sharing said housing.

4. A dryer as claimed in any one of claims 1 to 3, characterized in that the dryer comprises an exhaust channel extending from the drum to the outside of the casing for exhausting the exhaust gases.

5. The dryer of claim 4 wherein said exhaust passage includes a fan arranged to drive said exhaust gas for discharge.

6. The dryer of claim 4 including a lint trap connected to and in communication with said exhaust passage for discharging said exhaust gas.

7. A dryer as claimed in any one of claims 1 to 3, characterized in that the air inlets are each substantially smaller than the at least one air outlet.

8. The dryer of claim 7 wherein said air inlet includes perforations.

9. The dryer of claim 8 wherein said perforations are of one or more predetermined dimensions and adjacent perforations are spaced apart at one or more predetermined intervals to achieve optimal combustion of said gas burner to achieve complete combustion and to achieve acceptably low levels of carbon monoxide.

10. The dryer of claim 8 wherein said perforations are of a predetermined arrangement in shape and size and spacing from each other to achieve optimal combustion of said gas burner to achieve complete combustion and to achieve acceptably low levels of carbon monoxide.

11. The dryer of claim 9 wherein said perforations have a width of a particular size and adjacent perforations are spaced from one another by the same distance of a particular size.

12. The dryer of claim 11 wherein said specific dimension is substantially 2.5mm or 0.125 inches.

13. The dryer of claim 8 wherein said perforations comprise circular holes.

14. The dryer of claim 8 wherein said perforations are of the same shape and size.

15. A dryer as claimed in any one of claims 1 to 3, characterized in that the gas burner has a central axis, the hood extending around the central axis to enclose the gas burner.

16. The dryer of claim 15 wherein said hood has a central axis that coincides with said central axis of said gas burner.

17. The dryer of claim 15 wherein said hood has a length and a uniform cross-section along at least a portion of its length.

18. The dryer of claim 17 wherein said hood has a sleeve or cylindrical shape.

19. The dryer of claim 15 wherein said gas burner has a plurality of gas outlet holes facing in the same direction parallel to said central axis of said gas burner.

20. A dryer as claimed in any one of claims 1 to 3, wherein the hood has an open end remote from the gas burner, the open end being fully open to provide the at least one gas outlet.

21. A dryer as claimed in any one of claims 1 to 3, characterized in that the hood defines a combustion zone in which the gas burner burns.

22. A dryer as claimed in any one of claims 1 to 3, characterized in that the gas burner comprises an ignition electrode and a flame sensor, both of which are arranged within the hood.

23. A dryer as claimed in any one of claims 1 to 3, characterized in that the gas burner and the hood are connected together at their respective rear ends via a support.

24. The dryer of claim 23 wherein said support is provided as an end plate of said hood, said rear end of said gas burner being connected to said end plate.

25. A dryer according to any one of claims 1 to 3, characterized in that the dryer comprises a housing enclosing the other above-mentioned parts of the gas-fired hot gas device, the front end of the housing being provided with a spout for diverting exhaust gases exiting the hood.

26. The dryer of claim 25 wherein said spout has a flat cross section to diffuse said exhaust gas.