Main washing water tank for dish washing machine and dish washing machine

Abstract

The main washing water tank for the dish washing machine comprises a tank body, a partition plate, a water outlet pipe and a water drainage pipe assembly, the partition plate is arranged in the tank body, and the partition plate is used for dividing the interior of the tank body into a heating cavity and a heat recovery cavity. The partition plate is provided with a through hole, the through hole is configured to communicate the heating cavity with the heat recovery cavity, the water outlet pipe is provided with a first end and a second end, the first end extends into the heat recovery cavity, the first end is provided with a water inlet hole and a drainage hole, the drainage hole is located in the side, away from the partition plate, of the water inlet hole, and the drainage pipe assembly penetrates through the through hole and is detachably connected with the water outlet pipe. The drainage pipe assembly is provided with an avoiding hole, and the water inlet hole communicates with the avoiding hole, so that the traditional mode that residues in the heating cavity and the heat recovery cavity need to be cleaned separately can be abandoned, the cleaning steps of a user can be simplified, and the user can use the device conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to dish washer technical field, especially a kind of main washing water tank for dish washer and dish washer. BACKGROUND

[0002] The main washing and rinsing of the dish washer are two important steps in the washing process of the dish washer, which play a key role in the operation of the dish washer. The main washing stage is one of the important steps in the washing process of the dish washer. In this stage, high-pressure water flows through the heating, while the detergent is dissolved in the water, and the dishes are washed and rinsed to ensure that the dishes can be thoroughly cleaned. The rinsing stage follows the main washing stage. In this stage, the dish washer rinses the dishes to remove the detergent and impurities left over from the main washing stage.

[0003] The existing dish washer generally has a main washing water tank and a spraying assembly. The main washing water tank is used to supply water to the spraying assembly to wash the dishes during the main washing stage. After the dish washer is used for a period of time, the residual water in the main washing water tank needs to be cleaned to avoid water accumulation. In order to reduce energy waste, the existing main washing water tank generally includes a tank body, a partition and a drain pipe body. The partition is arranged in the tank body to divide the tank body into a heating cavity and a heat recovery cavity. When cleaning the residual water in the main washing water tank, the user needs to clean the water in the heating cavity and the heat recovery cavity respectively, which is complicated and inconvenient for the user to use. SUMMARY

[0004] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, the utility model provides a main washing water tank for a dish washer, which can simplify the cleaning steps of the user to facilitate the use of the user.

[0005] The utility model also provides a dish washer with the above-mentioned main washing water tank for a dish washer.

[0006] The main washing water tank for a dish washer according to the first aspect of the utility model comprises:

[0007] a tank body;

[0008] a partition arranged in the tank body, the partition is used to divide the interior of the tank body into a heating cavity and a heat recovery cavity, the partition is provided with a through hole, and the through hole is configured to communicate the heating cavity and the heat recovery cavity;

[0009] a water outlet pipe having a first end and a second end, the first end extending into the heat recovery cavity, the first end being provided with a water inlet hole and a drain hole, the second end being located outside the tank body, and the drain hole being located on the side of the water inlet hole away from the partition;

[0010] A drain pipe assembly is arranged in the through hole, and the drain pipe assembly is detachably connected with the water outlet pipe to open or block the drain hole.

[0011] According to the first aspect of the utility model, the main washing water tank for the dish washing machine has at least the following beneficial effects:

[0012] When the main washing water tank works, the drain pipe assembly is arranged in the through hole, and one end of the drain pipe assembly blocks the first end of the water outlet pipe, the water in the heating cavity flows to the bypass hole from the water inlet hole through the drain pipe assembly, and then flows into the heat recovery cavity to supplement the water with higher temperature in the heat recovery cavity, when the main washing water tank is cleaned, the user can take out the drain pipe assembly in the tank body to open the first end, the residual water in the heating cavity can flow into the water outlet pipe from the through hole to be discharged from the second end, and the residual water in the heat recovery cavity can flow into the water outlet pipe from the drain hole to be discharged from the second end, so that the traditional mode of cleaning the residual water in the heating cavity and the heat recovery cavity respectively can be abandoned, the cleaning steps of the user can be simplified, and the user can use conveniently.

[0013] According to some embodiments of the utility model, a first sealing structure is arranged between the drain pipe assembly and the first end, the first sealing structure is located on one side of the bypass hole close to the partition plate, a second sealing structure is arranged between the drain pipe assembly and the first end, and the second sealing structure is located on one side of the bypass hole away from the partition plate.

[0014] According to some embodiments of the utility model, the first sealing structure comprises a first sealing ring arranged on the drain pipe assembly, and the first sealing ring is clamped between the inner circumferential surface of the first end and the outer circumferential surface of the drain pipe assembly.

[0015] According to some embodiments of the utility model, the second sealing structure comprises a second sealing ring arranged on the drain pipe assembly, and the second sealing ring is clamped between the inner circumferential surface of the second end and the outer circumferential surface of the drain pipe assembly.

[0016] According to some embodiments of the utility model, the drain pipe assembly comprises a drain pipe body and a drain connector connected to one end of the drain pipe body, the water inlet hole is arranged on the drain connector, and one end of the drain connector away from the drain pipe body is inserted into the inside of the first end to block the drain hole.

[0017] According to some embodiments of the utility model, the circumferential edge of one side of the partition plate facing the heating cavity is provided with a positioning groove, the positioning groove is arranged around the outer circumferential surface of the through hole, the drain connector is provided with a positioning protrusion, and the positioning protrusion is accommodated in the positioning groove.

[0018] According to some embodiments of the present application, the overflow pipe is integrally formed with the water outlet pipe.

[0019] According to some embodiments of the present application, the overflow pipe is integrally formed with the water outlet pipe.

[0020] According to some embodiments of the present application, the first end is provided with a stepped portion, and the through hole is in sealing abutment with the stepped portion towards the periphery of the heat recovery cavity.

[0021] According to the second aspect of the present application, the dishwasher comprises the main washing water tank for the dishwasher as described in the above embodiments.

[0022] According to the second aspect of the present application, the dishwasher has at least the following beneficial effects:

[0023] When the main washing water tank is in operation, the drain pipe assembly is arranged in the through hole, and one end of the drain pipe assembly blocks the first end of the water outlet pipe. The water in the heating cavity flows to the avoiding hole through the drain pipe assembly from the water inlet hole, and then flows into the heat recovery cavity to supplement the water with higher temperature in the heat recovery cavity. When the main washing water tank is cleaned, the user can take out the drain pipe assembly in the tank body to open the first end. The residual water in the heating cavity can flow into the water outlet pipe from the through hole to be discharged from the second end. The residual water in the heat recovery cavity can flow into the water outlet pipe from the drain hole, and then be discharged from the second end. The traditional way of cleaning the residual water in the heating cavity and the heat recovery cavity respectively can be abandoned. The cleaning steps of the user can be simplified to facilitate the use of the user.

[0024] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description given below, taken in conjunction with the drawings in which:

[0026] Figure 1 FIG. 1 is a structural schematic view of a main washing water tank for a dishwasher according to an embodiment of the present application;

[0027] Figure 2 FIG. 2 is an exploded schematic view of the main washing water tank for the dishwasher according to the embodiment of the present application;

[0028] Figure 3 FIG. 3 is a top view of the main washing water tank for the dishwasher according to the embodiment of the present application; Figure 1

[0029] FIG. 4 is a sectional view of line A-A in FIG. 3; and Figure 4 Figure 3 FIG. 5 is a sectional view of line B-B in FIG. 3.​

[0030] Figure 5 is Figure 4 a local enlarged view of the middle B part;

[0031] Figure 6 is Figure 4 a schematic view after hiding the drainage assembly;

[0032] Figure 7 is an assembly view of the water outlet pipe, the drainage assembly and the overflow pipe of the embodiment of the utility model;

[0033] Figure 8 is an exploded view of the water outlet pipe, the drainage assembly and the overflow pipe of the embodiment of the utility model;

[0034] Figure 9 is a structural schematic view of the drainage joint of the embodiment of the utility model;

[0035] Figure 10 is a structural schematic view of the water outlet pipe and the overflow pipe of the embodiment of the utility model;

[0036] Figure 11 is a front view of the dishwasher of the embodiment of the utility model;

[0037] Figure 12 is a structural schematic view of the dishwasher of the embodiment of the utility model.

[0038] Reference signs:

[0039] box 100, heating cavity 101, heat recovery cavity 102, first sealing ring 103, second sealing ring 104, partition 200, through hole 210, positioning groove 220, water outlet pipe 300, first end 301, second end 302, avoiding hole 310, drainage hole 320, step part 330, drainage pipe assembly 400, drainage pipe main body 410, drainage joint 420, water inlet hole 421, positioning protrusion 422, overflow pipe 500, heat recovery pipe 600, water inlet section 610, water outlet section 620, heat recovery section 630, heating assembly 700. DETAILED DESCRIPTION

[0040] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0041] In the description of the utility model, it is understood that the direction description, such as the direction or positional relation indicated by up, down, front, back, left, right etc. is the direction or positional relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the limitation of the utility model.

[0042] In the description of the utility model, several means one or more, and multiple means two or more, greater than, less than, more than etc. are understood as not including the number, and above, below, within etc. are understood as including the number.If the first, second are described, it is only for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0043] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing and connecting should be understood broadly, and the person skilled in the art can determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0044] In the related art, the dishwasher is generally provided with a main washing water tank and a spraying assembly, the main washing water tank is used for supplying water for the spraying assembly to flush the tableware in the main washing stage. After the dishwasher is used for a period of time, the residual water in the main washing water tank needs to be cleaned to avoid water accumulation. In order to reduce energy waste, the existing main washing water tank generally includes a tank body 100, a partition plate 200 and a drain pipe body 410, the partition plate 200 is arranged in the tank body 100 to divide the tank body 100 into a heating cavity 101 and a heat recovery cavity 102, when cleaning the residual water in the main washing water tank, the user needs to clean the water in the heating cavity 101 and the heat recovery cavity 102 respectively, and the operation is complicated and inconvenient for the user to use.

[0045] Referring to Figures 1 to 6According to the main washing water tank for the dish washing machine, the water outlet pipe 300 is arranged in the heating cavity 101, and the water outlet pipe 300 is arranged in the heating cavity 101 and the heat recovery cavity 102 through the through hole 210, so that the water in the heating cavity 101 can flow into the heat recovery cavity 102 through the water outlet pipe 300, and the water in the heat recovery cavity 102 can flow into the water outlet pipe 300 through the drain hole 320, and then the water in the water outlet pipe 300 can be discharged from the second end 302, so that the traditional way of cleaning the residual water in the heating cavity 101 and the heat recovery cavity 102 respectively can be abandoned, and the cleaning steps of the user can be simplified, so that the user can use conveniently.

[0046] Specifically, when the main washing water tank works, the drain pipe assembly 400 is arranged in the through hole 210, and one end of the drain pipe assembly 400 blocks the first end 301 of the water outlet pipe 300, the water in the heating cavity 101 flows to the heat recovery cavity 102 through the drain pipe assembly 400 from the water inlet hole 421 to the avoiding hole 310, so as to supplement the water with higher temperature in the heat recovery cavity 102, when the main washing water tank is cleaned, the user can take out the drain pipe assembly 400 in the box body 100 to open the first end 301, the residual water in the heating cavity 101 can flow into the water outlet pipe 300 from the through hole 210 to be discharged from the second end 302, and the residual water in the heat recovery cavity 102 can flow into the water outlet pipe 300 from the drain hole 320, and then be discharged from the second end 302, so that the traditional way of cleaning the residual water in the heating cavity 101 and the heat recovery cavity 102 respectively can be abandoned, and the cleaning steps of the user can be simplified, so that the user can use conveniently.

[0047] It should be noted that the heating assembly 700 is arranged in the heating cavity 101, the user makes the water in the heating cavity 101 warm, and the heating assembly 700 can be an electromagnetic heating pipe or an infrared heating pipe or other heating components, which is not limited here.

[0048] Referring to Figure 5In some embodiments of the utility model, first sealing structure is equipped between drain pipe assembly 400 and first end 301, first sealing structure is located on the side of avoiding hole 310 close to baffle 200, second sealing structure is equipped between drain pipe assembly 400 and first end 301, second sealing structure is located on the side of avoiding hole 310 away from baffle 200, first sealing structure is used to prevent the water in heating cavity 101 from flowing into heat recovery cavity 102 from the gap between outlet pipe 300 and drain pipe assembly 400, second sealing structure is used to prevent the water in heat recovery cavity 102 from flowing out of heat recovery cavity 102 from the gap between outlet pipe 300 and drain pipe assembly 400, can improve the sealing effect of main washing water tank.

[0049] With reference to Figure 5 In some embodiments of the utility model, first sealing structure includes the first sealing ring 103 of being equipped with drain pipe assembly 400, first sealing ring 103 is clamped between the inner circumferential surface of first end 301 and the outer circumferential surface of drain pipe assembly 400, can prevent the water in heating cavity 101 from flowing into heat recovery cavity 102 from the gap between outlet pipe 300 and drain pipe assembly 400, to improve the sealing effect of main washing water tank.

[0050] Specifically, the side of avoiding hole 310 close to baffle 200 is equipped with first recess, first recess extends around the circumference of outlet pipe 300 and is arranged, part of first sealing ring 103 is housed in first recess, the inner circumferential surface of first sealing ring 103 and the bottom wall of first recess abut, to position first sealing ring 103, the outer circumferential surface of first sealing ring 103 and the inner circumferential surface of first end 301 sealing abut, can prevent the water in heating cavity 101 from flowing into heat recovery cavity 102 from the gap between outlet pipe 300 and drain pipe assembly 400, to improve the sealing effect of main washing water tank.

[0051] It should be noted that first sealing structure can also be the structure that first sealing groove and first sealing protrusion cooperate, first sealing groove is equipped with the inner circumferential surface of first end 301, first sealing protrusion is equipped with drain pipe assembly 400, first sealing groove and first sealing protrusion are all annular structure, first sealing protrusion is housed in first sealing groove and can abut with the side wall of first sealing groove, also can prevent the water in heating cavity 101 from flowing into heat recovery cavity 102 from the gap between outlet pipe 300 and drain pipe assembly 400, not limited here.

[0052] With reference to Figure 5In some embodiments of the utility model, second sealing structure includes the second sealing ring 104 of being located in drain pipe assembly 400, the second sealing ring 104 is clamped between the inner peripheral surface of second end 302 and the outer peripheral surface of drain pipe assembly 400, can prevent the water in heat recovery cavity 102 from the gap between outlet pipe 300 and drain pipe assembly 400 flow out heat recovery cavity 102, can improve the sealing effect of main washing water tank.

[0053] Specifically, the side of the avoidance hole 310 away from the partition plate 200 is provided with a second groove, the second groove is arranged around the circumference of the outlet pipe 300, part of the second sealing ring 104 is accommodated in the second groove, the inner peripheral surface of the second sealing ring 104 abuts against the bottom wall of the second groove to position the second sealing ring 104, the outer peripheral surface of the second sealing ring 104 sealingly abuts against the inner peripheral surface of the first end 301, which can prevent the water in the heat recovery cavity 102 from flowing out of the heat recovery cavity 102 through the gap between the outlet pipe 300 and the drain pipe assembly 400, and can improve the sealing effect of the main washing water tank.

[0054] It should be noted that the second sealing structure can also be a structure in which a second sealing groove cooperates with a second sealing protrusion, the second sealing groove is arranged on the inner peripheral surface of the first end 301, and the second sealing protrusion is arranged on the drain pipe assembly 400. The second sealing groove and the second sealing protrusion are both annular structures, the second sealing protrusion is accommodated in the second sealing groove and can abut against the side wall of the second sealing groove, which can also prevent the water in the heat recovery cavity 102 from flowing out of the heat recovery cavity 102 through the gap between the outlet pipe 300 and the drain pipe assembly 400, and this is not limited herein.

[0055] Referring to Figures 7 to 10 In some embodiments of the utility model, the drain pipe assembly 400 includes a drain pipe body 410 and a drain connector 420 connected to one end of the drain pipe body 410, and a water inlet hole 421 is arranged on the drain connector 420. One end of the drain connector 420 away from the drain pipe body 410 is inserted into the interior of the first end 301 to block the drain hole 320, which can facilitate blocking the drain hole 320.

[0056] Specifically, the drain hole 320 is arranged on the pipe wall of the first end 301. When the drain pipe assembly 400 is connected to the outlet pipe 300, one end of the drain connector 420 away from the drain pipe body 410 is inserted into the first end 301, which can block the drain hole 320 to block the drain hole 320.

[0057] It should be noted that, in the up-down direction, the drain hole 320 is located below the avoidance hole 310, and the lower side of the drain hole 320 is close to the bottom wall of the heat recovery cavity 102, which can reduce the residual amount of water in the heat recovery cavity 102.

[0058] It should be noted that, from top to bottom, the width of the inner diameter of the first end 301 gradually decreases, and correspondingly, the width of the outer diameter of the drain connector 420 gradually decreases, which can guide the drain connector 420 to facilitate the assembly of the drain connector 420 and the outlet pipe 300.

[0059] Reference Figure 4 , Figure 7 In some embodiments of this utility model, an overflow pipe 500 is also included. One end of the overflow pipe 500 extends into the heat recovery chamber 102, and the other end of the overflow pipe 500 is connected to the second end 302. On the one hand, this simplifies the piping structure of the main washing tank. On the other hand, when the dishwasher is working, it ensures that there is enough water in the heat recovery chamber 102 to reduce energy waste.

[0060] Specifically, the main wash tank also includes a heat recovery pipe 600. The heat recovery includes an inlet section 610, an outlet section 620, and a heat recovery section 630 located between the inlet section 610 and the outlet section 620. The heat recovery section 630 is located inside the heat recovery chamber 102. The inlet section 610 is used to connect with the dishwasher's rinsing water tank, and the outlet section 620 is used to connect with the dishwasher's spray assembly. The water in the heat recovery section 630 can exchange heat with the hot water in the heat recovery chamber 102. By setting an overflow pipe 500, on the one hand, during the main wash and cleaning stages of the dishwasher, the water in the main wash tank is discharged from the outlet pipe 300. On the other hand, it can ensure that there is enough water in the heat recovery chamber 102 to reduce energy waste.

[0061] Reference Figure 10 In some embodiments of this utility model, the overflow pipe 500 and the outlet pipe 300 are integrated into one structure, which can reduce the number of molds, thereby reducing the production and manufacturing cost of the molds and thus reducing the production and manufacturing cost of the dishwasher.

[0062] Reference Figure 5 , Figure 9 In some embodiments of this utility model, the periphery of the partition 200 facing the heating cavity 101 is provided with a positioning groove 220. The positioning groove 220 is arranged around the outer periphery of the through hole 210. The drain connector 420 is provided with a positioning protrusion 422. The positioning protrusion 422 is accommodated in the positioning groove 220, which can position the drain connector 420 so as to facilitate the installation of the drain connector 420.

[0063] Reference Figure 5 , Figure 10 In some embodiments of this utility model, a stepped portion 330 is provided on the outer periphery of the first end 301, and the through hole 210 is sealed and abutted against the periphery of the heat recovery chamber 102, which can prevent water in the heating chamber 101 from leaking from the gap between the partition plate 200 and the drain connector 420.

[0064] ReferenceFigure 11 、 Figure 12 According to the second aspect of the utility model, the dishwasher comprises the main washing water tank for the dishwasher according to the first aspect of the utility model, and the residual water in the main washing water tank is cleaned, so that the user can take out the drain pipe assembly 400 in the box body 100 to open the first end 301, the residual water in the heating cavity 101 can flow into the water outlet pipe 300 from the through hole 210 to be discharged from the second end 302, and the residual water in the heat recovery cavity 102 can flow into the water outlet pipe 300 from the drain hole 320 to be discharged from the second end 302, so that the traditional mode of cleaning the residual water in the heating cavity 101 and the heat recovery cavity 102 respectively can be abandoned, the cleaning steps of the user can be simplified, and the user can use conveniently.

[0065] Specifically, when the main washing water tank works, the drain pipe assembly 400 is arranged in the through hole 210, and one end of the drain pipe assembly 400 blocks the first end 301 of the water outlet pipe 300, the water in the heating cavity 101 flows to the avoidance hole 310 from the water inlet hole 421 through the drain pipe assembly 400 and then flows into the heat recovery cavity 102 to supplement the water with a higher temperature in the heat recovery cavity 102, when the main washing water tank is cleaned, the user can take out the drain pipe assembly 400 in the box body 100 to open the first end 301, the residual water in the heating cavity 101 can flow into the water outlet pipe 300 from the through hole 210 to be discharged from the second end 302, and the residual water in the heat recovery cavity 102 can flow into the water outlet pipe 300 from the drain hole 320 to be discharged from the second end 302, so that the traditional mode of cleaning the residual water in the heating cavity 101 and the heat recovery cavity 102 respectively can be abandoned, the cleaning steps of the user can be simplified, and the user can use conveniently.

[0066] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that the combinations are within the scope of the present disclosure.

[0067] The above-described embodiments are described in detail in combination with the drawings, however, the utility model is not limited to the above-described embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A main wash water tank for a dishwasher, for use in a dishwasher, characterized in that, The utility model relates to a water heating device, including: a box (100); a partition plate (200) arranged in the box (100), the partition plate (200) is used for separating the inside of the box (100) into heating cavity (101) and heat recovery cavity (102), the partition plate (200) is equipped with through -hole (210), the through -hole (210) is configured as the heating cavity (101) and the heat recovery cavity (102) are communicated; Water outlet pipe (300) has first end (301) and second end (302), the first end (301) extends to the heat recovery cavity (102) inside, the first end (301) is equipped with water inlet hole (421) and drain hole (320), the second end (302) is located the outside of the box (100), the drain hole (320) is located the water inlet hole (421) side away from the partition plate (200); Drain pipe assembly (400) is arranged in the through -hole (210), the drain pipe assembly (400) is detachably connected with the water outlet pipe (300), to open or block the drain hole (320), the drain pipe assembly (400) is equipped with the avoidance hole (310), the water inlet hole (421) is communicated with the avoidance hole (310).

2. The main wash water tank for a dishwasher according to claim 1, characterized in that, The first sealing structure between the drain pipe assembly (400) and the first end (301) is located the avoidance hole (310) side close to the partition plate (200), the second sealing structure between the drain pipe assembly (400) and the first end (301) is located the avoidance hole (310) side away from the partition plate (200).

3. The main wash water tank for a dishwasher according to claim 2, characterized in that, The first sealing structure includes the first sealing ring (103) arranged in the drain pipe assembly (400), and the first sealing ring (103) is clamped between the inner circumferential surface of the first end (301) and the outer circumferential surface of the drain pipe assembly (400).

4. The main wash water tank for a dishwasher according to claim 2, characterized in that, The second sealing structure includes the second sealing ring (104) arranged in the drain pipe assembly (400), and the second sealing ring (104) is clamped between the inner circumferential surface of the second end (302) and the outer circumferential surface of the drain pipe assembly (400).

5. The main wash water tank for a dishwasher according to claim 1, wherein, The drain pipe assembly (400) includes a drain pipe body (410) and a drain connector (420) connected to one end of the drain pipe body (410), the water inlet hole (421) is arranged in the drain connector (420), and the end of the drain connector (420) away from the drain pipe body (410) is inserted into the inside of the first end (301) to block the drain hole (320).

6. The main wash water tank for a dishwasher according to claim 5, characterized in that, The partition plate (200) is provided with a positioning groove (220) on the periphery of the side towards the heating cavity (101), the positioning groove (220) is arranged around the outer periphery of the through hole (210), the drain connector (420) is provided with a positioning protrusion (422), and the positioning protrusion (422) is accommodated in the positioning groove (220).

7. The main wash water tank for a dishwasher according to claim 1, wherein, Further comprising a water overflow pipe (500) having one end extending into the heat recovery cavity (102) and the other end communicating with the second end (302).

8. The main wash water tank for a dishwasher according to claim 7, characterized in that, The water overflow pipe (500) is integrally formed with the water outlet pipe (300).

9. The main wash water tank for a dishwasher according to claim 1, wherein, The first end (301) is provided with a stepped portion (330), and the through hole (210) is sealed against the stepped portion (330) toward the periphery of the heat recovery cavity (102).

10. A dishwasher, characterized in that A main washing water tank for a dishwasher as claimed in any one of claims 1 to 9.

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