CN112137542A

CN112137542A - Dish washing machine and control method

Info

Publication number: CN112137542A
Application number: CN201910566763.5A
Authority: CN
Inventors: 宋华诚; 杨林; 王科; 陈玉玲; 张青青; 刘维彤
Original assignee: Qingdao Haier Dishwasher Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Dishwasher Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-12-29

Abstract

The invention discloses a dish washing machine and a control method, wherein the dish washing machine comprises a water tank, a circulating pump and a sleeve heat exchange device, the sleeve heat exchange device comprises a sleeve and a drainage pipeline, the sleeve is provided with a water inlet and a water outlet, the water inlet is communicated with the water tank, and the water outlet is communicated with the circulating pump; the drainage pipeline is used for communicating the sleeve with the water tank. The sleeve heat exchange device comprises a plurality of sleeves, different sleeves are sequentially communicated through a detachable first connecting structure to form a water flow channel, one end of the drainage pipeline is connected with the sleeves and/or the first connecting structure, and the other end of the drainage pipeline is connected with the water tank. The dish washing machine can realize the disassembly and cleaning of the sleeve heat exchange device, and can realize the drainage of the washing water in the sleeve to the water tank when draining water by arranging the drainage pipeline, so that the washing water in the sleeve can be conveniently drained, and the cleanness of the sleeve can be kept.

Description

Dish washing machine and control method

Technical Field

The invention belongs to the field of dish washing machines, and particularly relates to a dish washing machine and a control method.

Background

The dish washer is used for automatically cleaning tableware such as dish, chopsticks, dish, knife and fork, and can be divided into two types of box type and conveying type according to the structure. It reduces the labor intensity for the cooking personnel in dining room, hotel and dining room of office, improves the working efficiency and promotes the cleanness and sanitation. Nowadays, various small dish washers have gradually entered ordinary households.

Some current dish washers use a heating pipe to supply heat to the dish washer, the heating pipe is arranged in a water tank at the bottom of an inner container, and when in washing, the heating pipe is used for heating, and circulating water of a circulating pump is used for washing dishes. However, this method consumes much power and does not dry thoroughly. Some dishwashers employ a heat pump system to heat the wash water. For example, the application number is 201420465616.1, the name is Chinese utility model patent of a heat pump type dish washing machine, the utility model provides a heat pump type dish washing machine, which comprises an inner container, a compressor, a condenser, a throttling device and an evaporator, wherein the condenser is arranged close to the outer wall of the inner container or wound on the outer wall of the inner container outside a water tank; the outlet of the compressor is connected with the inlet of the condenser, the outlet of the condenser is connected with the inlet of the evaporator through the throttling device, and the outlet of the evaporator is connected with the inlet of the compressor.

In the existing dish washer adopting the heat pump system, the condenser is generally a double-pipe heat exchanger, and the double-pipe heat exchanger is bent into a spiral shape. The heat exchanger is used for the dish washing machine and has the disadvantages that the occupied area is large, the space inside the spiral cannot be effectively utilized, and once the pollutants in the tableware enter the sleeve, the pollutants are not easy to discharge. Because the whole double-pipe heat exchanger is formed by bending a long pipe, the whole double-pipe heat exchanger cannot be handled even if manual maintenance is adopted in time.

The present invention has been made in view of this situation.

Disclosure of Invention

The invention provides a dish washing machine and a control method, the dish washing machine can realize the disassembly and cleaning of a sleeve heat exchange device, and can realize the automatic backflow of washing water in a sleeve to a water tank by arranging a drainage pipeline, so that the washing water in the sleeve is conveniently discharged, and the cleanness in the sleeve is kept.

In order to solve the technical problems, the invention adopts the technical scheme that:

the invention provides a dish washing machine, which comprises a water tank, a circulating pump and a sleeve heat exchange device, wherein the sleeve heat exchange device comprises a sleeve and a drainage pipeline, the sleeve is provided with a water inlet and a water outlet, the water inlet is communicated with the water tank, and the water outlet is communicated with the circulating pump; the drainage pipeline is used for communicating the sleeve with the water tank.

According to a further scheme, the sleeve heat exchange device comprises a plurality of sleeves, different sleeves are sequentially communicated through the detachable first connecting structure to form a water flow channel, one end of the drainage pipeline is connected with the sleeves and/or the first connecting structure, and the other end of the drainage pipeline is connected with the water tank.

In a further scheme, the joint of the drainage pipeline and the sleeve and/or the first connecting structure is positioned at the lowest position of the sleeve heat exchange device.

In a further scheme, the joint of the drainage pipeline and the sleeve and/or the first connecting structure is positioned at a water outlet of the sleeve;

preferably, the water outlet of the sleeve is positioned at the lowest position of the sleeve heat exchange device.

In a further scheme, the sleeve comprises an outer pipe and an inner pipe, the inner pipe is arranged in the outer pipe, the end part of the inner pipe extends out of the outer pipe, and the inner pipes of different sleeves are sequentially communicated through a first connecting structure;

preferably, the first connecting structure is an elbow, two ends of the elbow are respectively connected with the end parts of the inner pipes of the two sleeves, and a detachable bending part is formed between the two sleeves.

In a further scheme, the end part of the outer pipe is connected with the outer wall of the inner pipe in a sealing way; the outer pipes of the multiple sleeves are sequentially communicated through a second connecting structure to form a refrigerating medium channel;

preferably, the second connecting structure is a connecting pipe, two ends of the connecting pipe are respectively communicated with the side walls of the outer pipes of the two sleeves, and the areas between the inner pipes and the outer pipes of the multiple sleeves are sequentially communicated.

According to the further scheme, the central axes of the multiple sleeves are arranged in parallel, the two ends of the drainage pipeline are connected with the water tank and the first connecting structure respectively, and the axes of the drainage pipeline and the central axes of the multiple sleeves are arranged at a certain angle.

In a further scheme, the sleeve heat exchange device further comprises a positioning structure, the positioning structure is connected with each sleeve, and the sleeves are positioned through the positioning structures and keep a certain distance;

preferably, the fixing structure comprises a fixing frame, through holes matched with the outer diameters of the sleeves are formed in the fixing frame, and the sleeves penetrate through the corresponding through holes to be connected with the fixing frame.

In a further scheme, a water inlet and a water outlet of the sleeve are positioned on different sleeves and are respectively positioned at two ends of the sleeve heat exchange device; the end of the sleeve pipe provided with the water inlet is close to the water tank, and the end of the sleeve pipe provided with the water outlet and the drainage pipeline is close to the circulating pump.

According to a further scheme, the heat exchanger further comprises a shell, a door body is arranged on one side of the shell, the water tank is located in the center of the bottom in the shell, and the sleeve heat exchange device is arranged on one side, facing the door body, of the water tank.

A second object of the present invention is to provide a control method of a dishwasher having one or more aspects above, including: when the dish-washing machine works, the circulating pump is started, and the washing water in the water tank enters the circulating pump through the sleeve heat exchange device and the drainage pipeline and enters the inner container of the dish-washing machine;

when the circulating pump stops working or the drainage pump works, water in the sleeve heat exchange device flows back to the water tank through the drainage pipeline and is discharged by the drainage pump.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. the sleeve heat exchange device of the dish washer adopts the mode that one or more independent sleeves are connected and assembled through the detachable connecting parts, so that a user or a maintenance worker can clean foreign matters entering along with washing water in each sleeve at any time through the mode of detaching the connecting parts, the maintenance is convenient, the blockage in the sleeve is avoided, and the service life of the sleeve heat exchange device can be prolonged.

2. According to the sleeve heat exchange device of the dish washer, the independent sleeves are communicated through the detachable connecting parts, and the positions of the sleeves and the intervals among the sleeves can be arranged according to needs, so that the overall size of the sleeve heat exchange device is reduced, and the occupied space is saved.

3. The dish washing machine can realize that the washing water in the sleeve automatically flows back to the water tank through the arrangement of the drainage pipeline, so that the washing water in the sleeve is conveniently discharged, and the cleanness of the sleeve is kept.

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

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic structural diagram of a double-pipe heat exchange device of a dishwasher according to the present invention;

FIG. 2 is another schematic structural diagram of the bushing heat exchanger of the dishwasher of the present invention;

FIG. 3 is a schematic sectional view of the heat exchanger of the casing of the dishwasher of the present invention;

FIG. 4 is a side view of a dishwasher according to the invention;

FIG. 5 is a schematic side view of the dishwasher of the present invention;

FIG. 6 is a schematic side view of a further side of the dishwasher of the present invention;

FIG. 7 is a side view of the bottom of the dishwasher of the present invention;

FIG. 8 is a top view of the bottom of the dishwasher;

in the figure: the structure comprises a sleeve pipe 1, an outer pipe 2, an inner pipe 3, a first connecting structure 4, a second connecting structure 5, a water inlet 6, a water outlet 7, a refrigerating medium inlet 8, a refrigerating medium outlet 9, a fixing frame 10, a through hole 11, supporting legs 12, a first sleeve pipe 13, a second sleeve pipe 14 and a third sleeve pipe 15; 16 water flow channel, 17 refrigeration medium channel; 18 a drainage line;

20 shell, 21 door body, 22 water tank, 23 circulating pump and 24 draining pump; 25, a shunt valve; 26 a heating module;

30 evaporators, 31 fans, 32 sleeve heat exchange devices, 33 compressors, 34 drying filters and 35 water softening devices.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1 to 8, the present embodiment provides a dishwasher casing heat exchanging device 32, including:

a sleeve, a first detachable connecting structure 4 is arranged at the water inlet end and/or the water outlet end of the sleeve 1,

or a plurality of sleeves, different sleeves 1 are communicated in sequence through the detachable first connecting structure 4 to form a water flow channel 16.

In this embodiment, each casing 1 is independently installed. According to the size of the dishwasher, the double-pipe heat exchange device 32 may include one double-pipe 1, or may be formed by sequentially communicating and combining two double-pipes 1 and more than two double-pipes 1 through the detachable first connecting structure 4. For a spiral sleeve 1, the bent part of the sleeve 1 is easy to store up foreign matters and cannot be cleaned, and in the embodiment, the first connecting structure 4 between the independent sleeves 1 can be detached, so that the connecting part of the sleeve 1, which is easy to store up clothes, can be easily detached to clean, and a user or a maintenance worker can clean the foreign matters entering along with washing water inside each sleeve 1 at any time in a manner of detaching a connecting part, so that the maintenance is convenient, the blockage in the sleeve 1 is avoided, and the service life of the sleeve heat exchange device 32 can be prolonged.

When the sleeve heat exchange device 32 only comprises one sleeve 1, the sleeve 1 comprises an outer pipe 2 and an inner pipe 3 which are coaxially arranged, at least the inner pipe 3 of the sleeve 1 is linear, water flows in the inner pipe 3, a refrigeration medium flows between the inner pipe 3 and the outer pipe 2, the inner pipe 3 and the end part of the outer pipe 2 are connected in a sealing mode, the inner pipe 3 is provided with a water inlet 6 and a water outlet 7, and the outer pipe 2 is provided with a refrigeration medium inlet 8 and a refrigeration medium outlet 9. The water inlet 6 and the water outlet 7 of the inner tube 3 may be connected to other structures, such as a water tank 22, etc., through a detachable first connecting structure 4. The sleeve 1 is linear, so that foreign matters are not easy to accumulate, and the joint of the sleeve 1 and other structures can be detached, so that the sleeve heat exchange device 32 can be conveniently cleaned.

When the sleeve heat exchange device 32 comprises two or more independent sleeves 1, the different sleeves 1 are sequentially communicated through the detachable first connecting structure 4 to form a longer water flow channel 16, so that sufficient heat exchange between the washing water and the refrigeration medium can be ensured, and the joints between the different sleeves 1 can be conveniently cleaned. The length and diameter of different sleeves 1 may be the same or different.

Each independent sleeve pipe 1 all includes outer tube 2 and inner tube 3, inner tube 3 sets up and stretches out in outer tube 2 at the inside tip of outer tube 2 and inner tube 3, communicates in proper order through first connection structure 4 between the inner tube 3 of different sleeve pipes 1. First connection structure 4 be the return bend, preferred soft rubber tube, the both ends of return bend respectively with the end connection of two sleeve pipes 1's inner tube 3, form the detachable kink between two sleeve pipes 1.

In this scheme, at least every sleeve pipe 1's inner tube 3 is the straight tube, and the smooth pipe of preferred avoids the foreign matter in the washing water to store up in sleeve pipe 1, and user or maintainer only need dismantle the return bend of two sleeve pipe 1 junctions and clear up can.

In the scheme, in order to realize the independence of the two channels of the water flow and the refrigerating medium, the end part of the outer pipe 2 and the outer wall of the inner pipe 3 are welded and sealed; the side parts of the outer pipes 2 of the plurality of sleeves 1 are sequentially communicated through the second connecting structure 5 to form a refrigerating medium channel 17; among the plurality of sleeves 1 forming the refrigerating medium channel 17, the sleeves 1 at the head end and the tail end are provided with a refrigerating medium inlet 8 and a refrigerating medium outlet 9, and other sleeves 1 are communicated through a second connecting structure 5.

The second connecting structure 5 is a connecting pipe, and may be made of a material that is not affected by a refrigerant, for example, the connecting pipe may be a copper pipe. The two ends of the connecting pipe are respectively communicated with the side walls of the outer pipes 2 of the two sleeves 1, so that the areas between the inner pipes 3 and the outer pipes 2 of the multiple sleeves 1 are sequentially communicated to form a refrigerating medium channel 17. The communication position of the connecting pipe and the outer pipe 2 is close to the end part of the outer pipe 2; the connecting pipe can be a straight pipe or an arc pipe.

Because the space in the dish washer is limited, the space occupied by the spiral sleeve 1 is large, and the space between the spirals cannot be effectively utilized, thereby causing the waste of space. The plurality of sleeves 1 in the embodiment are independently arranged, so that the positions of the sleeves 1 and the intervals among the sleeves 1 can be arranged according to the specific condition of the size of the dishwasher, the overall size of the sleeve heat exchange device 32 is reduced, and the occupied space is saved.

Because many sleeve pipes 1 independent settings, connect through the return bend between the inner tube 3 of different sleeve pipes 1, many sleeve pipes 1's the mode of arranging then can have the multiple. The plurality of sleeves 1 can also be arranged in the front-back direction, the left-right direction, the parallel direction or a certain angle.

As a preferred embodiment, the central axes of the plurality of bushings 1 are parallel to each other, which takes up relatively little space. The central axes of the plurality of sleeves 1 may be located on the same plane or may be located on different planes. When the two sleeves 1 are included, the two sleeves 1 are parallel, namely, the two sleeves are arranged adjacently in parallel; when the number of the sleeves 1 is three or more, all the sleeves 1 may be arranged in parallel on the same plane, or in parallel on different planes.

As a specific mode, the sleeves 1 comprise three, the three sleeves 1 are arranged in parallel and arranged in parallel on the same plane, or the centers of the circles of the sections of the three sleeves 1 form the vertexes of a triangle; therefore, the overall size of the sleeve heat exchange device 32 can be reduced, and the occupied space is saved.

Further, in order to fix the positions of the multiple sleeves 1, in this embodiment, the sleeve heat exchanger 32 further includes a positioning structure, the positioning structure is connected to each sleeve 1, and the sleeves 1 are positioned by the positioning structure and keep a certain distance therebetween. The positioning structure has the advantages that the positioning structure is used for fixing the multiple sleeves 1 at one position to form a whole, the whole occupied space is limited, the relative positions of the multiple sleeves can be limited, a certain distance is kept between the sleeves, and the phenomenon that the bent pipe connected between the sleeves is excessively bent to cause blockage is avoided.

The fixing structure comprises a fixing frame 10, through holes 11 matched with the outer diameters of the sleeves 1 are formed in the fixing frame 10, and the sleeves 1 penetrate through the corresponding through holes 11 to be connected with the fixing frame 10. The number of the through holes corresponds to the number of the sleeves, and the diameter of the through holes corresponds to the outer diameter of the sleeves. When the external diameters of the sleeves are the same, the diameters of the through holes are the same, the external diameters of different sleeves are different, and the diameters of the through holes are in one-to-one correspondence with the external diameters of the sleeves, so that the effect of positioning and fixing is achieved.

The bottom of the fixing frame 10 is further provided with supporting legs 12, and the supporting legs 12 are perpendicular to the fixing frame 10 and supported on a plane below the sleeve heat exchange device 32. The plane here may be the bottom wall of the dishwasher housing 20, or may be another surface on which the heat exchanger 32 is placed. The supporting legs 12 are plate-shaped and may be formed by bending the bottom of the fixing frame 10, or may be connected to the fixing frame 10 in an independent structure.

Further, in order to ensure the heat exchange efficiency of the sleeve heat exchange device 32, a heat insulation structure is further arranged on the periphery of the sleeve 1 and/or among the sleeves 1 to insulate the sleeves 1; the heat insulation structure is a heat insulation layer made of heat insulation materials.

Furthermore, the water inlet 6 and the water outlet 7 of the water flow channel 16 are positioned on the same sleeve 1 or different sleeves 1, and the water inlet 6 and the water outlet 7 are positioned at two ends of the sleeve 1 so as to be connected with different devices in sufficient space to form a passage for washing water to enter the inner container of the dishwasher. For example, the water inlet 6 of the water channel 16 is connected with the water tank 22, the water outlet 7 is connected with the circulating pump 23, and when the circulating pump 23 is operated, the water in the water tank 22 enters the inner container of the dishwasher through the water channel 16 in the sleeve 1 and the circulating pump 23.

As a more specific embodiment, a double-tube heat exchanger 32 with three tubes 1 is illustrated:

the sleeve heat exchange device 32 comprises a first sleeve 13, a second sleeve 14 and a third sleeve 15, wherein the first sleeve 13, the second sleeve 14 and the third sleeve 15 are straight pipes and are arranged in parallel. The third sleeve 15 is positioned above the first sleeve 13, the circle center of the second sleeve 14 is positioned on the central line of the connecting line of the circle centers of the cross sections of the first sleeve 13 and the third sleeve 15, and the circle centers of the cross sections of the three sleeves 1 form the vertex of an isosceles triangle. One end of the inner pipe of the second sleeve 14 is communicated with the end part of the inner pipe of the first sleeve 13 through a bent pipe, the other end is communicated with the end part of the inner pipe of the third sleeve 15 through a bent pipe, and the free end parts of the inner pipes of the first sleeve 13 and the third sleeve 15 respectively form a water inlet 6 and a water outlet 7, so that a water flow channel 16 is formed. The side wall of one end of the outer tube of the second sleeve 14 is communicated with the side wall of the outer tube of the first sleeve 13 through a copper tube, and the side wall of the other end is communicated with the side wall of the outer tube of the third sleeve 15 through a copper tube. The side wall of the outer pipe close to the water inlet 6 on the first sleeve 13 is provided with a refrigerating medium outlet 9, and the side wall of the outer pipe close to the water outlet 7 on the third sleeve 15 is provided with a refrigerating medium inlet 8, so that a refrigerating medium channel 17 is formed. The direction of the water flow is opposite to the flow direction of the refrigerant medium.

The vertically placed fixing frame 10 is provided with three through holes 11, wherein each through hole comprises a first through hole, a second through hole and a third through hole, the third through hole is positioned above the first through hole, the circle center of the second through hole is positioned on the central line of the connecting line of the circle centers of the cross sections of the first through hole and the third through hole, and the circle centers of the cross sections of the three through holes form the vertex of an isosceles triangle. The three sleeves 1 respectively penetrate through the corresponding through holes in a one-to-one correspondence mode and are fixed. An insulating layer is arranged between the three sleeves.

In this embodiment, the casing heat exchanger 32 can be used as a condenser of a heat pump module of a dishwasher to heat washing water during a washing cycle and a drying cycle of the dishwasher.

Example two

As shown in fig. 7 and 8, the present embodiment provides a dishwasher, which includes a housing 20, a door 21 disposed on one side of the housing 20, a liner of the dishwasher disposed in the housing 20, a spraying arm disposed in the liner, and a water tank 22, a circulating pump 23 and a heat pump system disposed at the bottom of the liner.

The heat pump system of the dishwasher comprises a sleeve heat exchange device 32, wherein the sleeve heat exchange device 32 comprises a sleeve 1 and a drainage pipeline 18, the sleeve is provided with a water inlet and a water outlet, the water inlet is communicated with a water tank 22, and the water outlet is communicated with a circulating pump 23; the drain line 18 communicates the cannula with the water reservoir 22.

The casing heat exchanger 32 of the present embodiment is the casing heat exchanger 32 described in the first embodiment, and is different from the first embodiment in that the casing heat exchanger 32 of the present embodiment is further provided with a drainage pipeline 18, so that water in the casing heat exchanger 32 is drained to the water tank 22 to be drained during drainage, and is prevented from being accumulated in the casing.

The casing heat exchanger 32 of this embodiment includes a plurality of casings, and different casings are sequentially communicated through the detachable first connecting structure 4 to form a water flow channel, and one end of the drainage pipeline 18 is connected with the casing and/or the first connecting structure 4, and the other end is connected with the water tank 22.

One end of the drainage pipeline 18 is connected with the water tank 22, the other end of the drainage pipeline can be directly connected with the sleeve, and can also be connected with the first connecting structure 4 between different sleeves, or a plurality of drainage pipelines 18 are arranged and are respectively connected with the sleeve and the first connecting structure 4, so that the arrangement is convenient, and the sleeve is also communicated with the water tank 22.

The connection of the tapping line 18 to the casing and/or the first connection structure 4 is located at the lowest point of the casing heat exchanger 32. In order to discharge all water in the casing heat exchange device 32, a drainage pipe is arranged at the lowest position of the casing and/or the first connecting structure 4, so that all water in the casing can be drained to the water tank 22 and is not accumulated in the casing, and the cleanness of the casing can be kept.

When the dishwasher works, the circulating pump 23 works, negative pressure is formed at the position of a water inlet, washing water enters the sleeve from the water tank 22 to exchange heat with the refrigerant, and the water passes through the circulating pump 23 after being heated and is conveyed to the corresponding spraying arm to wash tableware by means of control of the shunt valve 25. When the washing pump stops operating or the drain pump 24 operates, the water in the casing flows in the reverse direction and returns to the water tank 22.

The connection position of the drainage pipeline 18 and the casing 1 and/or the first connection structure 4 is positioned at the water outlet of the casing; so as to avoid reducing water and reducing heat exchange effect through the condenser during working.

Preferably, the water outlet of the sleeve is located at the lowest position of the sleeve heat exchanging device 32.

Each sleeve pipe in this embodiment includes outer tube 2 and inner tube 3, inner tube 3 sets up inside outer tube 2 and the tip of inner tube 3 stretches out in outer tube 2, communicates in proper order through first connection structure 4 between the inner tube 3 of different sleeve pipes. The first connecting structure 4 is a bent pipe, preferably a soft rubber pipe, two ends of the bent pipe are respectively connected with the end parts of the inner pipes 3 of the two sleeves, and a detachable bending part is formed between the two sleeves. The kink can be dismantled, avoids the foreign matter in the washing water to store up in the sleeve pipe, and user or maintainer only need dismantle the return bend of two sleeve pipe junctions and clear up can.

The end part of the outer pipe 2 is connected with the outer wall of the inner pipe 3 in a sealing way; the outer pipes 2 of the multiple sleeves are sequentially communicated through a second connecting structure to form a refrigerating medium channel; the second connecting structure is a connecting pipe, two ends of the connecting pipe are respectively communicated with the side walls of the two sheathed outer pipes 2, and the areas between the inner pipes 3 of the multiple sheathed pipes and the outer pipes 2 are sequentially communicated, so that the independence of two channels of water flow and refrigeration media is realized.

The central axes of the multiple sleeves are arranged in parallel, two ends of the drainage pipeline 18 are respectively connected with the water tank 22 and the first connecting structure 4, and the axis of the drainage pipeline 18 and the central axes of the multiple sleeves are arranged at a certain angle. This way the space occupied is relatively small. The central axes of the plurality of sleeves can be positioned on the same plane or different planes. Therefore, the overall size of the sleeve heat exchange device 32 can be reduced, and the occupied space is saved. The drainage line 18 is arranged in such a way that it does not take up additional space.

The sleeve heat exchanger 32 further comprises a positioning structure, the positioning structure is connected with each sleeve, and the sleeves are positioned by the positioning structure and keep a certain distance. The positioning structure fixes the plurality of sleeves at one position to form a whole, limits the whole occupied space, and can limit the relative positions of the plurality of sleeves, so that a certain distance is kept between the sleeves, and the blockage caused by excessive bending of the bent pipe connected between the sleeves is avoided.

More specifically, the fixing structure comprises a fixing frame, through holes matched with the outer diameters of the sleeves are formed in the fixing frame, and the sleeves penetrate through the corresponding through holes to be connected with the fixing frame. The number of the through holes corresponds to the number of the sleeves, and the diameter of the through holes corresponds to the outer diameter of the sleeves. When the external diameters of the sleeves are the same, the diameters of the through holes are the same, the external diameters of different sleeves are different, and the diameters of the through holes are in one-to-one correspondence with the external diameters of the sleeves, so that the effect of positioning and fixing is achieved.

Further, the water inlet and the water outlet of the sleeve are positioned on different sleeves and are respectively positioned at two ends of the sleeve heat exchange device 32; the end of the casing with the water inlet is close to the water tank 22, and the end of the casing with the water outlet and the drainage pipeline 18 is close to the circulating pump 23. Thus, both ends of the double pipe heat exchanger 32 have sufficient spaces to be connected to the water tank 22 and the circulation pump 23, respectively.

The water tank 22 and the circulating pump 23 may be disposed at both ends of the same side in the casing axis direction, at both ends of different sides in the casing axis direction, or at both ends of the casing end portion. In any mode, more spaces can be reserved at the two ends of the sleeve where the water inlet and the water outlet of the water flow channel are located, and the sleeve heat exchange device 32 is favorably connected with and installed on the water tank 22 and the circulating pump 23.

The embodiment also provides a control method of the dishwasher with one or more of the above aspects, which comprises the following steps:

when the dishwasher works, the circulating pump 23 is started, and the washing water in the water tank 22 enters the circulating pump 23 through the sleeve heat exchange device 32 and enters the inner container of the dishwasher;

when the circulation pump 23 stops working or the drainage pump 24 works, the water in the casing heat exchanger 32 flows back to the water tank 22 through the drainage pipeline 18 and is drained by the drainage pump 24.

EXAMPLE III

As shown in fig. 7 and 8, the embodiment provides a dishwasher, which includes a housing, a door 21 is disposed on one side of the housing, an inner container of the dishwasher is disposed in the housing, a spraying arm is disposed in the inner container, and a water tank 22, a circulating pump 23 and a heat pump system are disposed at the bottom of the inner container. A water softening device 35 is provided at one side of the dishwasher. The heat pump system includes:

an evaporator 30 and a compressor 33, and,

the sleeve heat exchange device 32 comprises a sleeve, and a detachable first connecting structure 4 is arranged at the water inlet end and/or the water outlet end of the sleeve; or a plurality of sleeves, different sleeves are communicated in sequence through the detachable first connecting structure 4 to form a water flow channel;

the evaporator 30, the compressor 33 and the jacket heat exchanger 32 are disposed around the water tank 22 and are respectively located at different sides of the water tank 22.

The heat pump system is arranged in a bottom space of a housing of the dishwasher. The heat pump system comprises a compressor 33, a condenser (double pipe heat exchanger 32), a throttling device, an evaporator 30 and a dry filter 34. During washing, tap water is softened by the water softening device 35 through the water inlet valve and then enters the dishwasher. The circulation pump 23 drives water through the sprayer to wash the dishes. When the washing water needs to be heated, the circulating pump 23 drives the water to pass through the condenser, and then the tableware is washed by the sprayer. The compressor 33 is operated, and the pressure of the refrigerant entering the evaporator 30 through the throttling means is reduced, the saturation temperature is lowered, the refrigerant is evaporated below the outside, and a temperature difference is formed between the refrigerant and the outside air, thereby absorbing the heat of the energy storage substance. The refrigerant in the evaporator 30 is gasified and sucked and compressed by the compressor 33, the pressure is increased, the saturation temperature is increased, the refrigerant is condensed in the condenser at a temperature higher than the ambient temperature, the heat is released, the washing water in the water flow passage coaxial with the refrigerant in the condenser absorbs the heat released in the condenser, and the temperature is increased, so that the temperature of the washing water is increased by absorbing the heat every time the washing water passes through the condenser until the heating temperature is reached or the compressor 33 reaches the maximum load, and the operation is stopped. The flow direction of the refrigerant in the heat pump system is as follows: compressor 33, condenser, filter drier 34, throttling means, evaporator 30, and back to compressor 33. For good heating, the direction of water flow and the direction of refrigerant flow are preferably reversed.

In order to ensure the heating effect under different conditions, the dishwasher of the present invention may further include another heating module 26 for heating the washing water. The dishwasher may use the heat pump system alone or the heating module 26 alone to heat the washing water, or may use a combination of the two to heat the washing water.

The casing heat exchanger 32 in the present embodiment is the casing heat exchanger 32 in the first embodiment, and the casing heat exchanger 32 may be installed in the second embodiment, so as to facilitate the water in the casing to flow back.

The evaporator 30, the compressor 33 and the casing heat exchange device 32 of the embodiment are arranged around the water tank 22 and are respectively positioned on different side parts of the water tank 22, so that the arrangement is reasonable, the arrangement is compact, the installation is convenient, and more effective washing spaces can be provided for the dish washing machine.

In this embodiment, the evaporator 30 and the double pipe heat exchanger 32 are respectively disposed on two opposite sides of the water tank 22. Therefore, the fan 31 is convenient to mount, a linear air path is formed, resources are saved, and space is saved.

The direction of the water tank 22 toward the door 21 is defined as the front side of the water tank 22 with reference to the water tank 22, and the sleeve heat exchanger 32 is disposed between the side of the water tank 22 toward the door 21 and the housing, that is, the sleeve heat exchanger 32 is disposed at the front side of the water tank 22.

The sleeve heat exchange device 32 comprises a plurality of sleeves, each sleeve comprises an outer tube 2 and an inner tube 3, the inner tube 3 is arranged inside the outer tube 2, the end part of the inner tube 3 extends out of the outer tube 2, and the inner tubes 3 of different sleeves are sequentially communicated through a first connecting structure 4. The first connecting structure 4 is a bent pipe, two ends of the bent pipe are respectively connected with the end parts of the inner pipes 3 of the two sleeves, and a detachable bending part is formed between the two sleeves. So, the junction that stores up the foreign matter easily in the sleeve pipe then can be easy dismantlement get off and wash, and user or maintenance personal can clear up the foreign matter that each inside of sleeve pipe got into along with the washing water through the mode of dismantling adapting unit at any time, and convenient maintenance avoids blockking up in the sleeve pipe, can prolong sleeve pipe heat transfer device 32's life.

The end part of the outer pipe 2 is connected with the outer wall of the inner pipe 3 in a sealing way; the side part of the outer pipe 2 of one sleeve is provided with a refrigerating medium inlet and a refrigerating medium outlet, or the outer pipes 2 of a plurality of sleeves are sequentially communicated through a second connecting structure to form a refrigerating medium channel. The second connection structure is a connection pipe, two ends of the connection pipe are respectively communicated with the side walls of the two sleeved outer pipes 2, and the areas between the inner pipes 3 of the multiple sleeved pipes and the outer pipes 2 are sequentially communicated.

In this embodiment, the central axes of the plurality of sleeves are parallel to each other, and the central axes of the plurality of sleeves are parallel to the width direction of the door body 21. Thus, the casing heat exchanger 32 is arranged in a direction parallel or substantially parallel to the width of the dishwasher, so that the occupied space can be further saved, and meanwhile, the casing heat exchanger 32 is conveniently communicated with the water tank 22 and the circulating pump 23 respectively.

The casing heat exchanger 32 is provided with a water inlet and a water outlet of a water flow channel, the water inlet and the water outlet are located at two ends of the casing, one end of the casing provided with the water inlet is close to the water tank 22, and one end of the casing provided with the water outlet of the water flow channel is close to the circulating pump 23.

A direction in which the water tub 22 is separated from the door 21 is defined as a rear side of the water tub 22 with reference to the water tub 22. The evaporator 30 is disposed between a side of the water tank 22 facing away from the door body 21 and a side wall of the housing. That is, the evaporator 30 is disposed at the rear side of the water tank 22.

Preferably, the evaporator 30 is a finned evaporator 30, and the central axis of the finned evaporator 30 is parallel to the width direction of the side wall of the housing. That is, the finned evaporator 30 is disposed in a direction parallel or substantially parallel to the width of the dishwasher. So, evaporimeter 30 and sleeve pipe heat transfer device 32 (condenser) set up with being parallel to respectively or roughly being on a parallel with dishwasher width direction's position relatively, and both interval distances are far away, and the heat absorption is effectual with exothermic, and occupation space is few, is convenient for reduce dishwasher's whole volume, guarantees effective washing volume.

When the side of the water tank 22 close to the water softening device 35 is defined as the left side with reference to the water tank 22, the circulation pump 23 is provided on the left side of the water tank 22.

With reference to the water tank 22, the side of the water tank 22 facing away from the water softening device 35 is defined as the right side, and the compressor 33 is disposed on the right side of the water tank 22.

In this embodiment, the evaporator 30, the compressor 33 and the sleeve heat exchanger 32 are distributed around the water tank 22 in a U shape, the evaporator 30 and the sleeve heat exchanger 32 are disposed on two opposite sides of the water tank 22, and the compressor 33 is disposed at a bent portion of the U shape and opposite to a notch of the U shape. The heat pump system can form a passage of the heat pump system and save occupied space.

The circulating pump 23 is arranged at the U-shaped notch, the liquid inlet of the circulating pump 23 is communicated with the water outlet of the sleeve heat exchange device 32, the liquid outlet of the circulating pump 23 is connected with the shunt valve 25 of the dish-washing machine, the circulating pump 23 works during working, negative pressure is formed at the water inlet of the circulating pump 23, washing water enters the sleeve from the water tank 22 to exchange heat with a refrigerant, and after being heated and pressurized by the circulating pump 23, the washing water is conveyed to the corresponding spray arm to be washed by means of the control of the shunt valve 25. The water softening device 35 is arranged at the U-shaped notch and close to the circulating pump 23, and the water softening device 35 is communicated with the water tank 22. Preferably, the circulation pump 23 is disposed on a side of the water softening device 35 facing the water tank 22.

Example four

As shown in fig. 7 and 8, the present embodiment provides a dishwasher, which includes a housing 20, a door 21 disposed on one side of the housing 20, a liner of the dishwasher disposed in the housing 20, a spraying arm disposed in the liner, and a water tank 22, a circulating pump 23 and a heat pump system disposed at the bottom of the liner. A water softening device 35 is provided at one side of the dishwasher. The heat pump system includes:

the condenser comprises a sleeve, and a detachable first connecting structure 4 is arranged at the water inlet end and/or the water outlet end of the sleeve; or a plurality of sleeves, different sleeves are communicated in sequence through the detachable first connecting structure 4 to form a water flow channel;

the evaporator 30, the said evaporator 30 and condenser are set up in both sides of the cistern 22 relatively;

a fan 31, the fan 31 driving air through the evaporator 30, the water tank 22 and the condenser.

In this embodiment, the condenser is the casing heat exchanging device 32 described in the first to third embodiments, and the difference between this embodiment and the first to third embodiments is that the dishwasher of this embodiment is provided with the fan 31, and by adjusting the relative positions of the fan 31, the evaporator 30 and the condenser, the fan 31 can drive air to pass through the evaporator 30, the water tank 22 and the condenser, so that the air distribution is uniform, the resource utilization rate is improved, and energy is saved.

In this embodiment, the evaporator 30 and the condenser are disposed on two opposite sides of the water tank 22, and the fan 31 is disposed on one side of the evaporator 30 opposite to the water tank 22 and/or on one side of the evaporator 30 away from the water tank 22, so that the fan 31 can drive air to pass through the evaporator 30, the water tank 22 and the condenser in a blowing or suction manner, thereby achieving the purposes of improving resource utilization and saving energy.

In this application, the fan 31 may be a blower or a suction fan. One or more fans 31 may be provided. The fan 31 may be a single-port fan 31 or a multi-port fan 31, and may be configured to drive air through the evaporator 30, the water tank 22, and the condenser.

In the first embodiment, the fan 31 is a suction fan, and the suction fan is disposed downstream of the evaporator 30 along the air flowing direction.

The heat absorbed by the evaporator 30 is the heat of the air passing through the evaporator 30 driven by the fan 31. Along the air flow direction, the fan is preferably in the downstream direction of the air flow relative to the evaporator 30, and the air passing through the evaporator 30 is distributed more uniformly by means of air suction of the fan, so that the utilization rate of resources is improved. When the fan 31 is a suction fan, the fan 31 is disposed in the following manners:

in case 1, the fan 31 is disposed between the evaporator 30 and the water tank 22, an air inlet of the fan 31 faces the evaporator 30, an air outlet of the fan 31 faces the water tank 22, and the outside air passes through the evaporator 30 and the fan 31, and then is discharged through the water tank 22 and the condenser.

The condition 2 is that the fan 31 is arranged on one side of the evaporator 30, which is deviated from the water tank 22, the air inlet of the fan 31 faces the evaporator 30, the air outlet of the fan 31 faces the outside of the dishwasher, and the outside air is discharged after sequentially passing through the condenser, the water tank 22, the evaporator 30 and the fan 31.

The fan 31 is disposed downstream in the air flowing direction by means of an air suction manner, and drives the air to pass through the evaporator 30, the fan 31, the water tank 22, and the condenser in sequence and then to be discharged to the outside of the dishwasher, or drives the air to pass through the condenser, the water tank 22, the evaporator 30, and the fan 31 in sequence and then to be discharged. Under two kinds of circumstances, the suction fan all can make air distribution more even, and drive air straight line passes through condenser,

basin

22, 30 three parts of evaporimeter, satisfies the heat absorption demand of evaporimeter 30 and the heat dissipation demand of condenser, the energy can be saved, the increase of utilization ratio.

Scheme two, fan 31 is the hair-dryer, fan 31 sets up the one side that deviates from basin 22 at evaporimeter 30, and the air intake of fan 31 is towards the outside of dish washer, and the air outlet of fan 31 is towards evaporimeter 30, and the air is discharged after evaporimeter 30, basin 22 and the condenser in proper order.

When the fan 31 is a blower, the fan 31 is arranged on one side of the evaporator 30, which is far away from the water tank 22, so that the air can be driven to be discharged after sequentially passing through the evaporator 30, the water tank 22 and the condenser, the heat absorption requirement of the evaporator 30 and the heat dissipation requirement of the condenser are met, and the purpose of saving energy is achieved.

In order to facilitate installation of various components at the bottom of the dishwasher, the bottom of the dishwasher is further provided with a mounting seat, a first mounting area for mounting the water tank 22 is arranged in the middle of the mounting seat, and a second mounting area and a third mounting area for mounting the evaporator 30 and the condenser are respectively arranged on two opposite sides of the first mounting area. In this manner, the evaporator 30 and condenser are distributed on opposite sides of the water tank 22, facilitating the fan 31 to drive air across the evaporator 30, water tank 22 and condenser on one side of the evaporator 30.

In this embodiment, the water inlet of the condenser is communicated with the water tank 22 and is disposed between the side of the water tank 22 facing the door 21 and the casing, and the evaporator 30 is disposed between the side of the water tank 22 facing away from the door 21 and the side wall of the casing, so as to achieve the purpose of saving occupied space.

The third mounting area of the mounting seat is located on one side, namely the front side, of the water tank 22 facing the door body 21; the second mounting area is located on a side of the water tub 22 facing away from the door body 21, i.e., a rear side. When the suction fan is arranged on the side of the evaporator 30 facing away from the water bath 22, i.e. on the rear side of the evaporator 30, the air flow direction is: ambient air enters the mounting, passes through the condenser and water trough 22, flows through the evaporator 30, is drawn into the fan 31 and is exhausted to the rear of the mounting. When the fan 31 is disposed on the side of the evaporator 30 close to the water tank 22, the air flow direction is: outside air enters the mounting seat from the rear part of the mounting seat, passes through the evaporator 30 and the fan 31, and is discharged to the front side of the mounting seat along the directions of the water tank 22 and the condenser.

The condenser in this embodiment is a sleeve heat exchanger 32, which comprises a plurality of sleeves, the central axes of the plurality of sleeves are arranged in parallel; the central axes of the plurality of sleeves are arranged in parallel with the width direction of the door body 21. Every sleeve pipe includes outer tube 2 and inner tube 3, the tip that inner tube 3 set up inside and inner tube 3 at outer tube 2 stretches out in outer tube 2, communicates in proper order through first connection structure 4 between the different sheathed tube inner tubes 3. The first connecting structure 4 is a bent pipe, two ends of the bent pipe are respectively connected with the end parts of the inner pipes 3 of the two sleeves, and a detachable bending part is formed between the two sleeves. So, the junction that stores up the foreign matter easily in the sleeve pipe then can be easy dismantlement get off and wash, and user or maintenance personal can clear up the foreign matter that each inside of sleeve pipe got into along with the washing water through the mode of dismantling adapting unit at any time, and convenient maintenance avoids blockking up in the sleeve pipe, can prolong sleeve pipe heat transfer device 32's life.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A dish washing machine comprises a water tank and a circulating pump and is characterized by comprising a sleeve heat exchange device, wherein the sleeve heat exchange device comprises a sleeve and a drainage pipeline, the sleeve is provided with a water inlet and a water outlet, the water inlet is communicated with the water tank, and the water outlet is communicated with the circulating pump; the drainage pipeline is used for communicating the sleeve with the water tank.

2. The dishwasher of claim 1, wherein the casing heat exchanging device comprises a plurality of casings, different casings are sequentially communicated through a detachable first connecting structure to form a water flow channel, one end of the drainage pipeline is connected with the casing and/or the first connecting structure, and the other end of the drainage pipeline is connected with the water tank.

3. A dishwasher according to claim 2, wherein the connection of the drain line to the casing and/or the first connection is at the lowermost extent of the casing heat exchange means.

4. A dishwasher according to claim 2, wherein the connection of the drain line to the spigot and/or the first connection formation is at the outlet of the spigot;

5. The dishwasher according to any one of claims 1 to 4, wherein the sleeve comprises an outer tube and an inner tube, the inner tube is disposed inside the outer tube and an end of the inner tube protrudes from the outer tube, the inner tubes of different sleeves are sequentially communicated through the first connecting structure;

6. The dishwasher of claim 5, wherein the end of the outer pipe is closely connected to the outer wall of the inner pipe; the outer pipes of the multiple sleeves are sequentially communicated through a second connecting structure to form a refrigerating medium channel;

7. The dishwasher according to any one of claims 1 to 4, wherein central axes of the plurality of sleeves are arranged in parallel with each other, both ends of the drainage pipeline are connected to the sump and the first connecting structure, respectively, and the axis of the drainage pipeline is arranged at a certain angle to the central axes of the plurality of sleeves.

8. The dishwasher according to any one of claims 1 to 4, wherein the sleeve heat exchange device further comprises a positioning structure, the positioning structure is connected with each sleeve, and the sleeves are positioned and kept at a certain interval by the positioning structure;

9. The dishwasher according to any one of claims 1 to 4, wherein the water inlet and the water outlet of the casing are located on different casings and are respectively located at two ends of the casing heat exchange device; the end of the sleeve pipe provided with the water inlet is close to the water tank, and the end of the sleeve pipe provided with the water outlet and the drainage pipeline is close to the circulating pump.

10. A control method of a dishwasher according to any one of claims 1 to 9, characterized in that, when the dishwasher is in operation, the circulation pump is turned on, and the washing water in the water tank enters the circulation pump through the casing heat exchange device and the drainage pipeline and enters the inner container of the dishwasher;