CN115444346A

CN115444346A - Steam heat exchange structure and dish washing machine thereof

Info

Publication number: CN115444346A
Application number: CN202211409682.2A
Authority: CN
Inventors: 任富佳; 张凯源; 贺晓帆; 马涛
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2022-12-09
Anticipated expiration: 2042-11-11
Also published as: CN115444346B

Abstract

A steam heat exchange structure comprises a liner side wall and a condensing fan assembly arranged on the liner side wall; the condensation fan assembly comprises a condensation fan and a condensation cover plate covering the condensation fan, and a condensation pipe arranged around the condensation fan is arranged in the condensation cover plate; an air inlet of the air inlet condensation cavity is formed at the inner ring of the condensation pipe, and an air outlet of the condensation cavity for exhausting is formed at the top of the condensation pipe; a condensation backflow port is formed at the bottom of the condensation pipe, and flow guide surfaces matched with the condensation backflow port are formed on two sides of the condensation backflow port; compared with the prior art, the combined use of the condensation fan assembly and the hot air fan assembly firstly runs the condensation fan, extracts steam for condensation and discharge, quickly reduces the steam in the inner cavity, then runs the hot air fan, and under the state of the inner cavity with lower relative humidity, the temperature rise speed is higher, the heating and drying are further carried out, and the effect of high-temperature sterilization is realized.

Description

Steam heat exchange structure and dish washing machine thereof

Technical Field

The invention relates to the technical field of dish washing machines, in particular to a steam heat exchange structure and a dish washing machine with the same.

Background

The dish washer is the equipment of tableware such as automatic clear dish washing, chopsticks, dish, sword, fork, and full-automatic dish washer on the market can be divided into family and commercial two kinds, and domestic full-automatic dish washer is only applicable to the family, mainly has cabinet type, desktop, basin integral type and integrated form.

In the dish washer product, blow the processing to the dish washer inner chamber in the drying stage, improve the drying effect of dish washer, generally constitute by fan cooperation wind channel and heating device, mainly be after the dish washer washs the completion, dry the tableware.

Generally all adopt the fan structure among the prior art, the setting in cooperation wind channel blows in the inner chamber with the dry air of outside, realizes the drying of tableware in the dish washer inner chamber, and the part adopts PTC heater to dry air heating of external part, then blows in the inner chamber again to promote holistic drying effect, but this scheme heating efficiency is lower, and the heating effect is not obvious.

In the use of dish washer, owing to need wash the tableware through rivers, this just makes and to have a large amount of steam in the dish washer, and only adopt the fan to flow dish washer inner chamber air among the prior art, replace inside air through with outside air to discharge inside air, but in the in-service use process, owing to there being outside air's intervention, the gas overflow phenomenon appears easily, and outside air also can pollute the tableware in the inner chamber, influences the clean effect of tableware.

Meanwhile, when the amount of steam in the dish washer is large, the steam in the inner cavity of the dish washer is exhausted, and the steam contains a large amount of moisture, so that the cupboard is easily corroded, the damage to the cupboard is caused, and the use and the placement of the dish washer are influenced.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a steam heat exchange structure which does not have external air interference, discharges dry air and further improves the drying effect in an inner cavity of a dish washing machine and the dish washing machine.

In order to achieve the purpose, the invention adopts the following technical scheme: a steam heat exchange structure comprises a liner side wall and a condensing fan assembly arranged on the liner side wall; the condensation fan assembly is characterized by comprising a condensation fan and a condensation cover plate covering the condensation fan, wherein a condensation pipe surrounding the condensation fan is arranged in the condensation cover plate; and a condensation air inlet corresponding to the condensation fan is formed in the middle of the condensation cover plate.

As a preferred embodiment of the present invention, the condensation pipe is of an annular structure, an air inlet of a condensation chamber for air intake is formed in an inner ring of the condensation pipe, an air outlet of the condensation chamber for air exhaust is formed at a top of the condensation pipe, and steam entering through the air inlet of the condensation chamber is exhausted from the air outlet of the condensation chamber after being circulated for a circle along the condensation pipe.

As a preferable scheme of the invention, a condensation reflux port is formed at the bottom of the condensation pipe, and flow guide surfaces matched with the condensation reflux port are formed on two sides of the condensation reflux port.

As a preferable scheme of the invention, the air inlet of the condensation cavity is positioned at the top of the inner ring of the condensation pipe.

As a preferable scheme of the present invention, a partition plate is formed between the air inlet of the condensation chamber and the air outlet of the condensation chamber.

As a preferable scheme of the present invention, a plurality of wind blocking ribs are arranged in the condensation pipe, and the plurality of wind blocking ribs are obliquely arranged along a flow direction of the air duct.

As a preferred scheme of the invention, a hot air fan assembly matched with the condensation fan assembly is further arranged on the side wall of the inner container, the hot air fan assembly comprises a hot air fan and a hot air cover plate covering the hot air fan, a heating pipe arranged around the hot air fan is arranged in the hot air cover plate, a hot air inlet is formed in the middle of the hot air cover plate, and a hot air outlet is formed in the side edge of the hot air cover plate.

As a preferable scheme of the invention, the side wall of the inner container is provided with a mounting seat for accommodating the condensation fan assembly and the hot air fan assembly.

As a preferable mode of the present invention, the mounting seat includes a first mounting surface and a second mounting surface which are distributed in a step shape with the side wall of the inner container as a bottom.

As a preferable scheme of the present invention, the condensing fan or the hot air fan includes a motor main body, an impeller and a fan bracket, the impeller and the fan bracket are disposed on opposite sides of the motor main body in a wrapping manner, the impeller is mounted between the first mounting surface and the second mounting surface, and the fan bracket is mounted between the sidewall of the inner container and the first mounting surface.

As a preferable scheme of the present invention, the air inlet of the condensation chamber is arranged along a tangential direction of the top of the impeller.

As a preferred scheme of the present invention, the impeller includes a central disk body and a plurality of support sheets arranged around the circumference of the central disk body, and an impeller bending section for wrapping the motor main body is formed between the central disk body and the support sheets.

As a preferable scheme of the invention, the fan bracket comprises a middle supporting seat and an outer circular ring which are concentrically arranged, and a connecting strip used for wrapping the motor main body is arranged between the middle supporting seat and the outer circular ring.

As a preferable scheme of the present invention, the middle support seat and the outer ring are arranged in parallel, and the outer ring is located between the middle support seat and the impeller.

As a preferable scheme of the present invention, the hot air blower assembly and the condensing blower assembly operate independently or alternately.

A dish washing machine comprises a liner and a steam heat exchange structure, wherein air inlets of a condensation fan assembly and a hot air fan assembly are communicated with a liner cavity, and a liner air outlet communicated with an air outlet of a condensation cavity is formed in the side wall of the liner; and/or the condensing fan assembly and the hot air fan assembly operate independently or alternatively.

Compared with the prior art, the invention has the beneficial effects that:

1. the condensing fan component and the hot air fan component can be used independently, when the steam generated in the washing mode of the dish washing machine is too much, the condensing fan can be operated independently, and if the daily high-temperature sterilization treatment is carried out, the hot air fan can be operated independently;

2. the condensing fan assembly and the hot air fan assembly can be used in a combined mode, firstly, the condensing fan is operated to extract steam for condensation and discharge, the steam in the inner cavity is reduced rapidly, then, the hot air fan is operated, the temperature rising speed is higher under the condition of the inner cavity with lower relative humidity, the heating and drying are further carried out, and the high-temperature sterilization effect is realized;

3. the condensing channel with the annular structure is arranged, the condensing cavity is arranged at the outer ring of the fan, and after the centrifugal fan extracts steam from the inner cavity, the steam is directly blown into the condensing channel along the tangential direction;

4. the annular condensing channel is arranged in the path for discharging the steam, so that the steam can be fully condensed in the condensing channel, and the condensed dry air is discharged, so that the cabinet cannot be damaged due to the discharge of the steam.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a fan installation of the present invention;

FIG. 3 is a schematic view of the fan mounted to the side wall of the inner container;

FIG. 4 is an installed cross-sectional view of the hot air blower assembly;

FIG. 5 is an installed cross-sectional view of a condensing fan assembly;

FIG. 6 is a schematic view of the installation of the condenser tube;

FIG. 7 is a schematic view of the structure of the condensation duct;

FIG. 8 is a schematic view of the position of the inlet of the condensing chamber;

FIG. 9 is a cross-sectional view of a blower;

FIG. 10 is a schematic view of a fan configuration;

FIG. 11 is a schematic view of the mounting of a fan mount;

reference numerals: the inner bag lateral wall 1, hot-blast apron 2, hot-blast air outlet 3, hot-blast air intake 4, heating pipe 5, impeller 6, center disk body 61, impeller bending section 62, backing sheet 63, first installation face 7, fixation nut 8, blade 9, fan support 10, middle part supporting seat 101, connecting strip 102, outside ring 103, support bending section 104, bolt 105, motor main body 11, motor shaft 111, temperature controller standing groove 12, second installation face 13, condensation air intake 21, condensation apron 22, inner bag air exit 23, condenser pipe 24, condensation chamber air intake 25, condensation chamber air exit 26, wind blocking rib 27, condensation channel 28, condensation return opening 29, water conservancy diversion face 30.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the accompanying drawings.

As shown in fig. 1 to 11, a steam heat exchange structure comprises a liner side wall 1 and a condensing fan assembly mounted on the liner side wall 1; the condensation fan assembly comprises a condensation fan and a condensation cover plate 22 covering the condensation fan, and a condensation pipe 24 arranged around the condensation fan is arranged in the condensation cover plate 22; an air inlet 25 of an air inlet condensation cavity is formed at the inner ring of the condensation pipe 24, and an air outlet 26 of the condensation cavity for exhausting is formed at the top of the condensation pipe 24; a condensation return port 29 is formed at the bottom of the condensation pipe 24, and flow guide surfaces 30 matched with the condensation return port 29 are formed on two sides of the condensation return port 29; and a condensation air inlet 21 corresponding to the condensation fan is formed in the middle of the condensation cover plate 22.

Condensation fan subassembly and hot-blast air blower subassembly are installed in 1 middle part of inner bag lateral wall, and condensation fan subassembly and hot-blast air blower subassembly set up along 1 middle part symmetry of inner bag lateral wall, and condensation fan subassembly and hot-blast air blower subassembly assemble respectively in the intermediate position of dish washer inner bag lateral wall 1, guarantee that its position does not influence the normal assembly of upper and lower shelf and middle inner water pipe.

The inner container side wall 1 comprises side walls and an inner container back plate which are positioned at the left side and the right side of the inner container, and the inner container side wall 1 which is optimized in the application is the inner container back plate.

Still be equipped with the hot-blast fan subassembly with condensation fan subassembly looks adaptation on the inner bag lateral wall 1, the hot-blast fan subassembly is when accelerating the inner bag in the air flow, carries out the drying to the inner bag, and the hot-blast steam that can combine with the inner bag in of hot-blast fan subassembly production, flow to condensation fan subassembly department with higher speed, and condensation fan subassembly carries out the condensation operation to having the hot-blast of steam.

The hot air blower assembly comprises a hot air blower and a hot air cover plate 2 covering the hot air blower, a heating pipe 5 arranged around the hot air blower is arranged in the hot air cover plate 2, a hot air inlet 4 is formed in the middle of the hot air cover plate 2, and a hot air outlet 3 is formed in the side edge of the hot air cover plate 2.

The condensation chamber air inlet 25 is positioned at the top of the inner ring of the condensation pipe 24, a partition plate is formed between the condensation chamber air inlet 25 and the condensation chamber air outlet 26 at intervals, and the condensation chamber air inlet 25 is arranged along the tangential direction of the impeller 6.

A plurality of wind blocking ribs 27 are arranged in the condensation pipe 24, and the wind blocking ribs 27 are obliquely arranged along the flowing direction of the air duct.

Two installation bases are arranged on the side wall 1 of the inner container, the two installation bases wrap the condensation fan assembly and the hot air fan assembly respectively, and the installation bases are located in the condensation cover plate 22 or the hot air cover plate 2.

The mounting seat comprises a first mounting surface 7 and a second mounting surface 13 which are distributed in a step shape by taking the inner container side wall 1 as a bottom, a first connecting section 71 connected between the first mounting surface 7 and the inner container side wall 1 is formed, and a second connecting section 131 connected between the second mounting surface 13 and the first mounting surface 7 is formed.

The condensation pipe 24 is directly assembled on the first installation surface 7 of the inner container side wall 1, the condensation cavity 24 is annular, and the condensation cavity 24 is assembled on the outer ring of the condensation fan; similarly, the heating pipe 5 is also directly assembled on the first mounting surface 7 of the inner container side wall 1, the heating pipe 5 is also in a circular ring shape, and the heating pipe 5 is assembled on the outer ring of the hot air blower.

Condensation fan includes motor body 11, impeller 6 and fan support 10, and impeller 6 and fan support 10 parcel formula set up in motor body 11 relative both sides, and first linkage segment 71 and first installation face 7 parcel fan support 10 set up, and second linkage segment 131 and second installation face 13 parcel motor body 11 set up, and second installation face 13 middle part is formed with the through-hole.

Be formed with the impeller segmental bend 62 that is used for parcel motor main part 11 on the impeller 6, be formed with the support segmental bend 104 that is used for motor main part 11 on the fan support 10, motor main part 11 is cylinder type structure, impeller 6 and fan support 10 are the half enclosed structure of the relative setting of opening, motor main part 11 is located between the half enclosed structure of impeller 6 and fan support 10, with motor main part 11 parcel inside, impeller 6 and fan support 10's size designs according to actual motor main part 11's size, under impeller segmental bend 62 and support segmental bend 104's effect, impeller 6 and fan support 10 press close to motor main part 11 and set up as far as possible, thereby reduce impeller 6 and fan support 10 and occupy the space in the extra thickness direction, the thickness of whole fan structure has been reduced.

The first connecting section 71 and the first mounting surface 7 form an annular sunken platform structure, and the second connecting section 131 and the second mounting surface 13 also form an annular sunken platform structure.

The motor shaft 111 of the motor main body 11 penetrates through a through hole in the middle of the second mounting surface 13 to be fixedly connected with the impeller 6, a sunken structure arranged in the direction of the second connecting section 131 is formed in the middle of the impeller 6, a plurality of blades 9 distributed circumferentially are formed on the outer ring of the impeller 6, and the motor shaft 111 is fixedly connected with the impeller 6 through a fixing nut 8, so that the rotation of the motor shaft 111 and the rotation of the impeller 6 are synchronized.

The impeller 6 comprises a central disc body 61 and a plurality of supporting pieces 63 arranged around the circumference of the central disc body 61, an impeller bending section 62 is connected between the central disc body 61 and the supporting pieces 63, the supporting pieces 63 are arranged in parallel with the central disc body 61, the supporting pieces 63 are arranged between the central disc body 61 and the fan support 10, corresponding blades 9 are arranged on the supporting pieces 63, the blades 9 are vertically arranged on the supporting pieces 63, the number of the supporting pieces 63 is set according to actual needs, in the rotating process of the central disc body 61, the supporting pieces 63 are synchronously driven to rotate, so that the blades 9 are driven to rotate, and the flow of the wind speed of the fan is realized.

The central disc body 61 and the impeller bending section 62 are arranged to wrap the motor main body 11, the supporting pieces 63 are connected to the end portions of the impeller bending sections 62, the central disc body 61 and the impeller bending sections 62 are used for wrapping the motor main body 11, and the supporting pieces 63 are used for supporting the blades 9, so that in the rotating process of the impeller 6, when the motor main body 11 is wrapped, the wind speed flowing is achieved.

Fan support 10 includes middle part supporting seat 101 and outside ring 103 of concentric setting, is equipped with connecting strip 102 between middle part supporting seat 101 and the outside ring 103, and support bending segment 104 is located connecting strip 102 middle part, and connecting strip 102, middle part supporting seat 101 and outside ring 103 formula structure as an organic whole.

The connecting strip 102 is provided with bolts 105 fixedly connected with the motor body 11, the bolts 105 are symmetrically arranged on two sides of the middle supporting seat 101, and the middle supporting seat 101 and the motor body 11 are fixedly connected under the action of the two bolts 105.

Middle part supporting seat 101 and outside ring 103 parallel arrangement, outside ring 103 is located between middle part supporting seat 101 and impeller 6, middle part supporting seat 101 and connecting strip 102 parcel motor body 11 set up, outside ring 103 links to each other with all connecting strips 102 simultaneously, middle part supporting seat 101 and connecting strip 102 are used for wrapping up motor body 11, outside ring 103 position is corresponding with backing sheet 63 position for backing sheet 63 has better equilibrium at the rotation in-process.

A temperature controller placing groove 12 is formed on the outer ring 103, a temperature controller is arranged in the temperature controller placing groove 12, the temperature controller is connected with the motor main body 11 through a lead, and the motor main body 11 can be controlled according to actual temperature.

The condensation fan and the hot air fan are consistent in structure, the maximum diameter of the hot air inlet 4 is the inner diameter of the fan blade 9, and similarly, the maximum diameter of the condensation air inlet 21 is the inner diameter of the fan blade 9, when the hot air fan operates, heat generated by the heating pipe 5 can be timely dissipated, air enters from the hot air inlet 4 of the hot air cover plate 2, and is blown out from the hot air outlets 3 on four sides of the hot air cover plate 2 after the action of the blades 9; when the condensing fan is operated, wet air enters from the condensing cover plate 22 of the condensing air inlet 21 and is blown into the condensing pipe 24 for condensation, and condensed dry air is directly discharged.

A dish washer comprises a liner and a steam heat exchange structure, wherein air inlets of a condensation fan assembly and a hot air fan assembly are communicated with a liner cavity, and a liner air outlet 23 communicated with a condensation cavity air outlet 26 is formed on the side wall 1 of the liner; condensation fan subassembly and hot-blast fan subassembly independent operation, condensation fan subassembly can discharge after condensing the steam of inside in condensation chamber 24, promotes the drying effect of inner chamber.

Condensation fan subassembly and hot air blower subassembly all extract and blow off the air of dish washer inner chamber in the use, realize dish washer cavity inner loop, do not have the outside air to blow in, the overflow vapour phenomenon because of the outside air blows in the appearance can not appear, tableware in the inner chamber can not polluted by the outside air yet.

When the fan is operated, steam is sucked from the front condensation cover plate 22, blown into the condensation cavity air inlet 25 by the fan and enters the condensation channel 28. A plurality of wind blocking ribs 27 are arranged in the condensation wind channel, and after steam enters, the steam can be rapidly condensed under the blocking effect of the wind blocking ribs 27. Meanwhile, the condensing channel 28 is annular, steam is condensed on the side wall of the condensing channel 28, and formed water drops flow down along the side wall and finally flow onto the flow guide surface 30 of the condensing cavity 24 to flow out from the condensed water return opening 29. In order to facilitate the outflow of the condensed water from the condensed water backflow port 29, the flow guiding surface 30 is inclined and forms a certain included angle with the horizontal plane, and the condensed water backflow port 29 is located at the lowest position of the flow guiding surface 30. When the steam is sufficiently condensed in the condensing passage 28 and then turns into dry air, the dry air is discharged to the outside from the upper condensing chamber air outlet 26.

The operation flow of the condensation fan assembly is that the condensation fan rotates to suck steam in the inner cavity from the condensation cover plate 22 on the front surface of the condensation air inlet 21, then the steam is blown into the condensation cavity 24 from the condensation cavity air inlet 25 along the tangential direction of the impeller 6 to be condensed, the condensed dry air is discharged, and condensed water flows out from the condensed water return opening 29.

The operation flow of the hot air fan system is that the hot air fan rotates to suck outside air from a hot air inlet 4 on the front surface of a hot air cover plate 2 and then blows off the air along the tangential direction of the rotation of an impeller 6, a heating pipe 5 heats the air on the outer side of the impeller 6 and takes away heat from the air blown off by the fan, and the air is blown off to an inner cavity of the dish washing machine through a hot air outlet 3 of the hot air cover plate 2, so that tableware is dried.

The hot air fan system is generally opened after the operation of the condensation fan system, the condensation fan system is firstly utilized to greatly reduce the steam in the inner cavity, then the hot air fan system is opened to improve the temperature in the inner cavity, and the overall drying effect is enhanced.

The first embodiment is as follows: the condensation fan assembly and the hot air fan assembly can independently operate, and can independently operate through selection of a program, if steam generated by a selected washing mode is too much, the condensation fan assembly can independently operate, and if daily high-temperature sterilization treatment is performed, the hot air fan assembly can independently operate.

Example two: the condensation fan assembly and the hot air fan assembly are matched for use, when the dishwasher just enters a drying stage, the steam content in the inner cavity of the dishwasher is large, the condensation fan assembly is operated firstly, the steam is pumped out for condensation and is discharged, and the steam in the inner cavity is reduced rapidly. Then the hot air blower is operated, the temperature rising speed is higher under the state of an inner cavity with lower relative humidity, and the high-temperature sterilization effect is realized by further heating and drying.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more here: the structure of the fan comprises a liner side wall 1, a hot air cover plate 2, a hot air outlet 3, a hot air inlet 4, a heating pipe 5, an impeller 6, a central disc body 61, an impeller bending section 62, a supporting sheet 63, a first mounting surface 7, a fixing nut 8, a blade 9, a fan bracket 10, a middle supporting seat 101, a connecting strip 102, an outer circular ring 103, a bracket bending section 104, a bolt 105, a motor main body 11, a motor shaft 111, a temperature controller placing groove 12, a second mounting surface 13, a condensation air inlet 21, a condensation cover plate 22, a liner air outlet 23, a condensation pipe 24, a condensation cavity air inlet 25, a condensation cavity air outlet 26, a wind shielding rib 27, a condensation channel 28, a condensation return port 29, a flow guide surface 30 and other terms, but the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. A steam heat exchange structure comprises a liner side wall (1) and a condensation fan assembly arranged on the liner side wall (1); the condensing fan assembly is characterized by comprising a condensing fan and a condensing cover plate (22) covering the condensing fan, wherein a condensing pipe (24) arranged around the condensing fan is arranged in the condensing cover plate (22); and a condensation air inlet (21) corresponding to the condensation fan is formed in the middle of the condensation cover plate (22).

2. The steam heat exchange structure according to claim 1, wherein the condensation pipe (24) is an annular structure, a condensation chamber air inlet (25) for air inlet is formed at an inner ring of the condensation pipe (24), a condensation chamber air outlet (26) for air exhaust is formed at the top of the condensation pipe (24), and steam entering through the condensation chamber air inlet (25) is exhausted from the condensation chamber air outlet (26) after circling around the condensation pipe (24).

3. The steam heat exchange structure according to claim 2, wherein a condensation return port (29) is formed at the bottom of the condensation pipe (24), and flow guide surfaces (30) matched with the condensation return port (29) are formed on two sides of the condensation return port (29).

4. A steam heat exchange structure according to claim 2, wherein the condensation chamber inlet (25) is located at the top of the inner ring of the condensation pipe (24).

5. A steam heat exchange structure according to claim 4, characterized in that a partition is formed between the condensation chamber air inlet (25) and the condensation chamber air outlet (26) at intervals.

6. A steam heat exchange structure according to claim 1, wherein a plurality of wind blocking ribs (27) are arranged in the condensation pipe (24), and the plurality of wind blocking ribs (27) are obliquely arranged along the flowing direction of the air duct.

7. The steam heat exchange structure according to any one of claims 1 to 6, wherein the inner container side wall (1) is further provided with a hot air blower assembly adapted to the condensation blower assembly, the hot air blower assembly comprises a hot air blower and a hot air cover plate (2) covering the hot air blower, a heating pipe (5) arranged around the hot air blower is arranged in the hot air cover plate (2), a hot air inlet (4) is formed in the middle of the hot air cover plate (2), and a hot air outlet (3) is formed in the side edge of the hot air cover plate (2).

8. The steam heat exchange structure according to claim 7, wherein the side wall (1) of the inner container is provided with a mounting seat for accommodating a condensation fan assembly and a hot air fan assembly.

9. The steam heat exchange structure according to claim 8, wherein the mounting seat comprises a first mounting surface (7) and a second mounting surface (13) which are distributed in a step shape by taking the inner container side wall (1) as a bottom.

10. The steam heat exchange structure according to claim 7, wherein the condensing fan or the hot air fan comprises a motor main body (11), an impeller (6) and a fan bracket (10), the impeller (6) and the fan bracket (10) are arranged on two opposite sides of the motor main body (11) in a wrapping manner, the impeller (6) is arranged between the first mounting surface (7) and the second mounting surface (13), and the fan bracket (10) is arranged between the liner side wall (1) and the first mounting surface (7).

11. A steam heat exchange structure according to claim 10, wherein the condensation chamber air inlet (25) is arranged along a tangential direction of the top of the impeller (6).

12. A steam heat exchange structure according to claim 10, wherein the impeller (6) comprises a central disc body (61) and a plurality of supporting sheets (63) arranged around the circumference of the central disc body (61), and an impeller bending section (62) for wrapping the motor body (11) is formed between the central disc body (61) and the supporting sheets (63).

13. A steam heat exchange structure according to claim 10, wherein the fan support (10) comprises a middle support seat (101) and an outer ring (103) which are concentrically arranged, and a connecting strip (102) for wrapping the motor main body (11) is arranged between the middle support seat (101) and the outer ring (103).

14. A steam heat exchange structure according to claim 13, wherein the intermediate support base (101) and the outer ring (103) are arranged in parallel, and the outer ring (103) is located between the intermediate support base (101) and the impeller (6).

15. The steam heat exchange structure of claim 7, wherein the hot air fan assembly and the condensing fan assembly operate independently or alternately.

16. A dish washing machine, characterized in that, it comprises a liner and a steam heat exchange structure as in any one of claims 1-15, the air inlets of the condensation fan component and the hot air fan component are both communicated with the liner cavity, and the liner side wall (1) is formed with a liner air outlet (23) communicated with the condensation cavity air outlet (26); and/or the condensing fan assembly and the hot air fan assembly operate independently or alternatively.