A self-sealing heat exchanger, an air conditioner indoor unit, and an air conditioner

Abstract

The present invention provides a self-sealing heat exchanger, an indoor unit of an air conditioner, and an air conditioner. The self-sealing heat exchanger includes: a second-stage evaporator (2) and a third-stage evaporator (3), and the second-stage evaporator (2) and the third-stage evaporator (3) are completely cut at their joined parts, and then the two are bent relative to each other. The third-stage evaporator (3) includes a third inner side (31) located on the inner side of the bend, and the second-stage evaporator (2) includes a second inner side (21) located on the inner side of the bend. A part of the structure of the third inner side (31) is inserted into the inside of the second inner side (21), or a part of the structure of the second inner side (21) is inserted into the inside of the third inner side (31). By means of the present invention, air leakage at this part can be prevented or reduced, the heat exchange efficiency of the evaporator can be improved, the noise can be reduced, the cost can be reduced, the process is simple, and a shower-type cooling effect can be formed indoors and the hidden danger of dripping water can be prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and particularly relates to a self-sealing heat exchanger, an indoor unit of an air conditioner, and an air conditioner. Background Art

[0002] In the traditional refrigeration industry, the evaporator blade type of the indoor unit is generally in an inverted V shape, and the air outlet blows obliquely downward. When the cold air blows downward, the air supply range is very small, and the space above the air outlet cannot be effectively cooled. Moreover, air leakage is likely to occur at the part between the two bent sections of the evaporator, resulting in air that has not passed through the evaporator heat exchange being blown out through the air outlet, greatly affecting the heat exchange efficiency of the evaporator, and reducing the cooling or heating comfort in the room. In the existing structure, sealant clay, stainless steel buckles and other structures are used to seal this place, but their sealing effect is poor, the noise increases, the cost increases, the process is complex, and the energy efficiency decreases. And condensation is likely to occur between the other two bent sections of the evaporator, resulting in a problem of dripping hidden danger.

[0003] Due to the technical problems in the indoor evaporator of the air conditioner in the prior art that air leakage is likely to occur at the part between the two bent sections, resulting in air that has not passed through the evaporator heat exchange being blown out through the air outlet, greatly affecting the heat exchange efficiency of the evaporator; the inverted V-shaped evaporator layout form, with the air outlet blowing obliquely downward, resulting in a very small air supply range when the cold air blows downward and the space above the air outlet cannot be effectively cooled; condensation is likely to occur between the other two bent sections of the evaporator, resulting in problems such as dripping hidden danger, the present invention researches and designs a self-sealing heat exchanger, an indoor unit and an air conditioner. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that air leakage is likely to occur at the part between the two bent sections of the indoor evaporator of the air conditioner in the prior art, resulting in air that has not passed through the evaporator heat exchange being blown out through the air outlet, greatly affecting the heat exchange efficiency of the evaporator, so as to provide a self-sealing heat exchanger, an indoor unit of an air conditioner, and an air conditioner.

[0005] The present invention provides a self-sealing heat exchanger, which includes:

[0006] The second section of the evaporator and the third section of the evaporator, and the second section of the evaporator and the third section of the evaporator are completely cut at their joint part, and then they are bent relative to each other. The third section of the evaporator includes a third inner side located on the inner side of the bend, and the second section of the evaporator includes a second inner side located on the inner side of the bend. And a part of the structure of the third inner side is inserted into the inside of the second inner side, or a part of the structure of the second inner side is inserted into the inside of the third inner side.

[0007] Preferably,

[0008] The second stage of the evaporator includes a second bottom edge at its lowermost end, the third stage of the evaporator includes a third bottom edge at its lowermost end, the third bottom edge includes a third cut edge remaining after cutting, and the third cut edge is inserted into the interior between the second bottom edge and the second inner edge;

[0009] Or,

[0010] The second stage of the evaporator includes a second bottom edge at its lowermost end, the third stage of the evaporator includes a third bottom edge at its lowermost end, the second bottom edge includes a second cut edge remaining after cutting, and the second cut edge is inserted into the interior between the third bottom edge and the third inner edge.

[0011] Preferably,

[0012] The second stage of the evaporator includes a second top edge at its uppermost end, the third stage of the evaporator includes a third top edge at its uppermost end, the third top edge includes a fourth cut edge remaining after cutting, and the fourth cut edge is inserted into the interior between the second top edge and the second inner edge.

[0013] Or,

[0014] The second stage of the evaporator includes a second top edge at its uppermost end, the third stage of the evaporator includes a third top edge at its uppermost end, the second top edge includes a fifth cut edge remaining after cutting, and the fifth cut edge is inserted into the interior between the third top edge and the third inner edge.

[0015] Preferably,

[0016] The second inner edge intersects the third inner edge at point O, the lower stop point or upper stop point of the third inner edge is P, and the distance between point P and point O is the self-sealing interference amount, and the range of the self-sealing interference amount is 0.5 mm - 1.2 mm.

[0017] Preferably,

[0018] The second inner edge intersects the third inner edge at point O, the second stage of the evaporator includes a second bottom edge at its lowermost end, the third stage of the evaporator includes a third bottom edge at its lowermost end, and the second bottom edge intersects the third bottom edge at point Q; or, the second stage of the evaporator includes a second top edge at its uppermost end, the third stage of the evaporator includes a third top edge at its uppermost end, and the second top edge intersects the third top edge at point Q;

[0019] And the distance between point Q and point O is the self-sealing interference range, and the self-sealing interference range is greater than or equal to 20 mm.

[0020] Preferably,

[0021] The second stage of the evaporator and the third stage of the evaporator are bent relative to each other to form a "V" - shaped structure, and the opening of the "V" - shaped structure is arranged upward; and / or, the self - sealing heat exchanger includes heat exchange tubes, fins and an evaporator side plate; and / or, the self - sealing heat exchanger is an evaporator.

[0022] Preferably,

[0023] After the second stage of the evaporator and the third stage of the evaporator are bent relative to each other, the second inner side and the third inner side are arranged opposite to each other; and / or, it further includes a first stage of the evaporator, and the first stage of the evaporator is connected to one end of the second stage of the evaporator far from the third stage of the evaporator.

[0024] Preferably,

[0025] The first stage of the evaporator and the second stage of the evaporator are also bent at the joint between the two. The first stage of the evaporator includes a first inner side located on the inner side of the bend and a first outer side located on the outer side of the bend. The second stage of the evaporator includes a second outer side located on the outer side of the bend, and the first outer side is cut at the position of the bend.

[0026] Preferably,

[0027] After the first outer side is cut at the bend, the most distal end point of the first outer side in the horizontal direction away from the first inner side is M, and the most distal end point of the second outer side in the horizontal direction away from the second inner side is N. The distance between the end point M and the end point N in the horizontal direction is MN, and MN≥5mm.

[0028] The present invention also provides an air - conditioner indoor unit, which includes the self - sealing heat exchanger described in any one of the preceding items, and further includes a blower located inside the bend of the second stage of the evaporator and the third stage of the evaporator.

[0029] The present invention also provides an air - conditioner, which includes the self - sealing heat exchanger described in any one of the preceding items or the aforementioned air - conditioner indoor unit.

[0030] A self - sealing heat exchanger, an air - conditioner indoor unit and an air - conditioner provided by the present invention have the following beneficial effects:

[0031] 1. By cutting the originally connected part between the second stage and the third stage of the evaporator, then bending the two parts, and finally inserting the third inner side part into the inside of the second inner side part, or inserting the second inner side part into the inside of the third inner side part, the present invention can form a large interference between the bottoms of the second stage and the third stage of the evaporator (when placed in a positive V shape, the V opening is upward), or form a large interference between the tops of the second stage and the third stage of the evaporator (when placed in an inverted V shape, the V opening is downward), thereby forming an effective and reliable seal at the joint of the second stage and the third stage of the evaporator, preventing or greatly reducing air leakage at this part, preventing the air that has not passed through the heat exchange of the evaporator from being blown out through the air outlet, improving the heat exchange efficiency of the evaporator, and having a better sealing effect compared with the existing structures using sealant, stainless steel buckles, etc. for sealing, and reducing noise, cost, and the process is simple;

[0032] 2. The present invention also forms a "V" - shaped structure by bending the second stage and the third stage of the evaporator, and the opening of the "V" - shaped structure is arranged upward, which can make the air inlet of the air conditioner indoor unit be below and the air outlet be above, and the air after heat exchange is blown out from the upper air outlet, resulting in a shower - type cooling effect on the room, greatly improving the cooling effect on the room;

[0033] 3. The present invention also cuts the outer side of the bent part of the first stage of the evaporator at the joint of the first stage and the second stage of the evaporator, so that the condensed water generated by the water vapor in the air cooled by the first stage of the evaporator will not drip down to other parts of the air conditioner indoor unit because the outer side of the first stage of the evaporator protrudes beyond the outer side of the second stage of the evaporator, but the condensed water vapor generated by the first stage of the evaporator can be caught by the second stage of the evaporator and flow into the second stage of the evaporator, rather than directly dripping down and causing potential safety hazards, solving the problem of dripping water hazards and improving the operation reliability of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a three - dimensional structure schematic diagram of the existing evaporator;

[0035] Figure 2 is a structure schematic diagram of the self - sealing heat exchanger of the present invention before bending;

[0036] Figure 3 is a front cross - sectional view of the self - sealing heat exchanger of the present invention after bending;

[0037] Figure 4 is Figure 3 a partial enlarged view of part A of

[0038] Figure 5 is a three - dimensional structure schematic diagram of the self - sealing heat exchanger of the present invention after bending.

[0039] The reference numerals in the figure are as follows:

[0040] 1. First stage of the evaporator; 11. First inner side; 12. First outer side; 2. Second stage of the evaporator; 21. Second inner side; 22. Second bottom side; 23. Second outer side; 3. Third stage of the evaporator; 31. Third inner side; 32. Third bottom side; 321. Third cut edge; 4. Self-sealing interference amount; 5. Self-sealing interference range; 6. Fan; 7. Heat exchange tube; 8. Evaporator side plate. Detailed implementation manners

[0041] As Figure 2-5 shown, the present invention provides a self-sealing heat exchanger, which includes:

[0042] The second stage 2 of the evaporator and the third stage 3 of the evaporator, and the joint part of the second stage 2 of the evaporator and the third stage 3 of the evaporator is completely cut, and then the two are bent with each other. The third stage 3 of the evaporator includes a third inner side 31 located on the inner side of the bend, and the second stage 2 of the evaporator includes a second inner side 21 located on the inner side of the bend (after the second stage 2 of the evaporator and the third stage 3 of the evaporator are bent with each other, the second inner side 21 and the third inner side 31 are arranged oppositely), and a part of the structure of the third inner side 31 is inserted into the inside of the second inner side 21, or a part of the structure of the second inner side 21 is inserted into the inside of the third inner side 31.

[0043] By cutting the originally connected part of the second stage and the third stage of the evaporator, then bending the two, and finally inserting a part of the third inner side into the inside of the second inner side or inserting a part of the second inner side into the inside of the third inner side, the present invention can form a large interference between the bottom parts (when placed in a positive V shape, the V opening is upward) of the second stage and the third stage of the evaporator, or form a large interference between the top parts (when placed in an inverted V shape, the V opening is downward) of the second stage and the third stage of the evaporator, so as to form an effective and reliable seal for the joint part of the second stage and the third stage of the evaporator, prevent or greatly reduce air leakage at this part, prevent the air that has not passed through the heat exchange of the evaporator from being blown out through the air outlet, improve the heat exchange efficiency of the evaporator, and compared with the existing structures using sealant, stainless steel buckles, etc. for sealing, the sealing effect is better, and the noise is reduced, the cost is reduced, and the process is simple.

[0044] Preferably,

[0045] The second stage 2 of the evaporator includes a second bottom side 22 at its lowermost end, the third stage 3 of the evaporator includes a third bottom side 32 at its lowermost end, the third bottom side 32 includes a third cut edge 321 remaining after being cut, and the third cut edge 321 is inserted into the inside between the second bottom side 22 and the second inner side 21;

[0046] Or,

[0047] The second stage 2 of the evaporator includes a second bottom edge 22 at its lowermost end, the third stage 3 of the evaporator includes a third bottom edge 32 at its lowermost end, the second bottom edge 22 includes a second cut edge (not shown) remaining after cutting, and the second cut edge (not shown) is inserted into the interior between the third bottom edge 32 and the third inner edge 31.

[0048] This is a preferred structural form of the interference between the second stage and the third stage of the evaporator of the present invention (the V-shaped opening of the heat exchanger bent into a V shape faces upward, that is, a positive V shape, as Figure 3 and 5 ), that is, the third bottom edge at the bottom of the third stage of the evaporator is cut, and then the third cut edge is inserted into the position between the second inner edge and the second bottom edge, as Figure 4 shown, or the second bottom edge at the bottom of the second stage of the evaporator is cut, and then the second cut edge is inserted into the position between the third inner edge and the third bottom edge (not shown), which can make the interference amount and interference range formed between the bottom of the second stage of the evaporator and the bottom of the third stage of the evaporator larger than that in the prior art ( Figure 1 ), improve the air leakage prevention effect (i.e., the sealing effect) at the joint part. Compared with using structural forms such as sealant clay and stainless steel buckles for sealing, the sealing effect is better, and the noise is reduced, the cost is reduced, and the process is simple.

[0049] Preferably,

[0050] The second stage 2 of the evaporator includes a second top edge (not shown) at its uppermost end, the third stage 3 of the evaporator includes a third top edge (not shown) at its uppermost end, the third top edge includes a fourth cut edge (not shown) remaining after cutting, and the fourth cut edge is inserted into the interior between the second top edge and the second inner edge;

[0051] Or,

[0052] The second stage 2 of the evaporator includes a second top edge at its uppermost end, the third stage 3 of the evaporator includes a third top edge at its uppermost end, the second top edge includes a fifth cut edge (not shown) remaining after cutting, and the fifth cut edge is inserted into the interior between the third top edge and the third inner edge.

[0053] This is another preferred structural form of the interference between the second and third sections of the evaporator of the present invention (the V-shaped opening of the heat exchanger bent into a V shape faces downward, that is, an inverted V shape), that is, the third top edge at the top of the third section of the evaporator is cut, and then the fourth cut edge is inserted into the position between the second inner edge and the second top edge (not shown), or the second top edge at the top of the second section of the evaporator is cut, and then the fifth cut edge is inserted into the position between the third inner edge and the third top edge (not shown), which can make the interference amount and interference range formed between the top of the second section of the evaporator and the top of the third section of the evaporator larger than that in the prior art ( Figure 1 ), improving the air leakage prevention effect (i.e., sealing effect) at the joint part. Compared with using structures such as sealant and stainless steel buckles for sealing, the sealing effect is better, and the noise is reduced, the cost is reduced, and the process is simple.

[0054] Preferably,

[0055] The second inner edge 21 intersects the third inner edge 31 at point O. The lower stop point or upper stop point of the third inner edge 31 is P, and the distance between point P and point O is the self-sealing interference amount 4. The range of the self-sealing interference amount is 0.5 mm - 1.2 mm. As Figure 4 shown, this is the dimensional position of the self-sealing interference amount of the present invention. The distance between the position point of the lower stop point or upper stop point P of the third inner edge and the intersection point O of the second inner edge and the third inner edge is the self-sealing interference amount, which can illustrate the size of the distance that the third inner edge is inserted downward or upward into the second inner edge, and can effectively reflect the magnitude of the interference degree between the bottom of the third section of the evaporator and the bottom of the second section of the evaporator. And experiments prove that setting the range of the self-sealing interference amount to the above numerical range can effectively improve the heating capacity or refrigeration capacity (effect) and reduce the noise. The performance test results are as follows: The test results under the same 1000 r / min and the same test environment are:

[0056] Table 1

[0057] Heating capacity Noise Air volume Non-self-sealing 4907.8 43.9 900 Self-sealing interference 0.5mm 4950 43.6 900 Self-sealing interference 0.8mm 5005 43 900 Self-sealing interference 1.0mm 5006 43.1 900 Self-sealing interference 1.2mm 5005 43 900

[0058] Preferably,

[0059] The second inner edge 21 intersects the third inner edge 31 at point O. The second section 2 of the evaporator includes a second bottom edge 22 at its lowermost end. The third section 3 of the evaporator includes a third bottom edge 32 at its lowermost end, and the second bottom edge 22 intersects the third bottom edge 32 at point Q; or, the second section 2 of the evaporator includes a second top edge (not shown) at its uppermost end. The third section 3 of the evaporator includes a third top edge (not shown) at its uppermost end, and the second top edge (not shown) intersects the third top edge (not shown) at point Q;

[0060] And the distance between a point Q and a point O is the self-sealing interference range 5, and the self-sealing interference range is greater than or equal to 20 mm.

[0061] The dimensional position of the self-sealing interference range of the present invention is such that the distance between the position point of the intersection point Q of the third bottom side and the second bottom side and the intersection point O of the second inner side and the third inner side is the self-sealing interference range, which can illustrate the size of the distance for the third inner side to insert downward or upward into the second inner side, and can effectively reflect the magnitude of the interference degree between the bottom of the three sections of the evaporator and the bottom of the second section of the evaporator. And experiments prove that setting the range of the self-sealing interference amount within the above numerical range can effectively improve the heating capacity or refrigerating capacity (effect), and reduce noise. According to the experimental results, when the optimal interference range of the self-sealing interference amount is 0.8 mm - 1 mm and the self-sealing interference range is above 20 mm, the best state of self-sealing can be achieved, and the self-sealing structure at this time is the most reliable and stable.

[0062] Preferably,

[0063] After the second section 2 of the evaporator and the third section 3 of the evaporator are bent relative to each other, a "V"-shaped structure is formed, and the opening of the "V" shape is arranged upward; and / or, the self-sealing heat exchanger includes a heat exchange tube 7, fins and an evaporator side plate 8; and / or, the self-sealing heat exchanger is an evaporator. The present invention also forms a "V"-shaped structure by bending the second section of the evaporator and the third section of the evaporator, and the opening of the "V" shape is arranged upward, which can make the air inlet of the air conditioner indoor unit be at the lower part and the air outlet be at the upper part, and the air after heat exchange is blown out from the upper air outlet, so as to form a shower-type refrigeration effect on the room, greatly improving the refrigeration effect on the room.

[0064] Preferably,

[0065] After the second section 2 of the evaporator and the third section 3 of the evaporator are bent relative to each other, the second inner side 21 and the third inner side 31 are arranged opposite to each other; and / or, it further includes a first section 1 of the evaporator, and the first section 1 of the evaporator is connected to one end of the second section 2 of the evaporator far from the third section 3 of the evaporator. This is the preferred setting position and setting form of the first section of the evaporator of the present invention, which can exchange heat with the air flowing through this position, increase the heat exchange area, and enhance the heat exchange effect.

[0066] Preferably,

[0067] The first section 1 of the evaporator and the second section 2 of the evaporator are also bent at the joint between the two. The first section 1 of the evaporator includes a first inner side 11 located on the inner side of the bend and a first outer side 12 located on the outer side of the bend. The second section 2 of the evaporator includes a second outer side 23 located on the outer side of the bend, and the first outer side 12 is cut at the position of the bend. The present invention also cuts the outer side of the bent part of the first section of the evaporator at the joint between the first section and the second section of the evaporator, so that the condensed water generated by the water vapor in the air cooled by the first section of the evaporator will not drip down to other parts of the air conditioner indoor unit because the outer side of the first section of the evaporator protrudes beyond the outer side of the second section of the evaporator. Instead, the condensed water vapor generated by the first section of the evaporator can be caught by the second section of the evaporator and flow into the second section of the evaporator, without directly dripping down and causing potential safety hazards, solving the problem of dripping water hazards and improving the reliability of air conditioner operation.

[0068] Preferably,

[0069] After the first outer side is cut at the bend, the most distal end point of the first outer side 12 in the horizontal direction away from the first inner side 11 is M, and the most distal end point of the second outer side 23 in the horizontal direction away from the second inner side 21 is N. The distance between the end point M and the end point N in the horizontal direction is MN, and MN≥5mm. Setting the above size to more than 5mm can effectively prevent the condensed water on the first section 1 of the evaporator from dripping along the outer side to a position outside the second section of the evaporator, causing potential safety hazards. Instead, the condensed water on it is preferably caught by the second section of the evaporator, thus effectively solving the problem of dripping water safety hazards.

[0070] The present invention also provides an air conditioner indoor unit, which includes the self-sealing heat exchanger described in any one of the preceding items, and further includes a blower 6 located inside the bend between the second section 2 of the evaporator and the third section 3 of the evaporator.

[0071] The present invention can effectively and reliably seal the joint between the second section and the third section of the evaporator by cutting the originally connected part between the second section and the third section of the evaporator, then bending the two, and finally inserting part of the third inner side into the inside of the second inner side, or inserting part of the second inner side into the inside of the third inner side, preventing or greatly reducing air leakage at this part, preventing air that has not passed through the evaporator heat exchange from being blown out through the air outlet, improving the heat exchange efficiency of the evaporator, and having a better sealing effect, lower noise, lower cost, and simpler process compared with the existing structures using sealant, stainless steel buckles, etc. for sealing;

[0072] By bending the second and third sections of the evaporator to form a "V" - shaped structure with the opening of the "V" facing upward, the air after heat exchange can be blown out from the upper air outlet, achieving a shower - type cooling effect on the indoor environment and greatly improving the indoor cooling effect.

[0073] Also, at the joint of the first and second sections of the evaporator, the outer side of the bent part of the first section of the evaporator is cut, so that the condensed water vapor generated by the first section of the evaporator can be received by the second section of the evaporator when it flows downward and flow into the second section of the evaporator, preventing direct dripping and potential safety hazards. This solves the problem of dripping water and improves the reliability of air - conditioner operation.

[0074] The present invention also provides an air - conditioner, which includes the self - sealing heat exchanger described in any of the previous items or the aforementioned air - conditioner indoor unit. The self - sealing of the evaporator of the present invention has the advantages of cost reduction, process reduction, energy - efficiency increase, noise reduction, and air - conditioner adjustment time reduction, etc. It solves the problem of water - dripping hazards during the cooling of the positive - V evaporator and brings an additional function: the inverted evaporator can achieve the function of having the air outlet on the upper part and the air inlet on the lower part, enabling the air - conditioner to perform shower - type cooling and air supply. This can greatly enhance the human experience, save heating time, increase cooling efficiency and cooling comfort.

[0075] The above - mentioned are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above - mentioned is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A self-sealing heat exchanger, characterized in that: Comprising: The second stage evaporator (2) and the third stage evaporator (3), and the connection part between the second stage evaporator (2) and the third stage evaporator (3) is completely cut, and then they are bent relative to each other. The third stage evaporator (3) includes a third inner side (31) located on the inner side of the bend, and the second stage evaporator (2) includes a second inner side (21) located on the inner side of the bend. A part of the structure of the third inner side (31) is inserted into the interior of the second inner side (21), or a part of the structure of the second inner side (21) is inserted into the interior of the third inner side (31); The second stage evaporator (2) includes a second bottom edge (22) at its lowermost end, and the third stage evaporator (3) includes a third bottom edge (32) at its lowermost end. The third bottom edge (32) includes a third cut edge (321) remaining after cutting, and the third cut edge (321) is inserted into the interior between the second bottom edge (22) and the second inner side (21); or, the second stage evaporator (2) includes a second bottom edge (22) at its lowermost end, the third stage evaporator (3) includes a third bottom edge (32) at its lowermost end, the second bottom edge (22) includes a second cut edge remaining after cutting, and the second cut edge is inserted into the interior between the third bottom edge (32) and the third inner side (31); or, The second stage evaporator (2) includes a second top edge at its uppermost end, the third stage evaporator (3) includes a third top edge at its uppermost end, the third top edge includes a fourth cut edge remaining after cutting, and the fourth cut edge is inserted into the interior between the second top edge and the second inner side; or, the second stage evaporator (2) includes a second top edge at its uppermost end, the third stage evaporator (3) includes a third top edge at its uppermost end, the second top edge includes a fifth cut edge remaining after cutting, and the fifth cut edge is inserted into the interior between the third top edge and the third inner side; The second inner side (21) intersects with the third inner side (31) at point O, the lower stop or upper stop of the third inner side (31) is P, and the distance between point P and point O is the self-sealing interference amount (4), and the range of the self-sealing interference amount is 0.5 mm - 1.2 mm; The second inner side (21) intersects with the third inner side (31) at point O, the second stage evaporator (2) includes a second bottom edge (22) at its lowermost end, the third stage evaporator (3) includes a third bottom edge (32) at its lowermost end, and the second bottom edge (22) intersects with the third bottom edge (32) at point Q; or, the second stage evaporator (2) includes a second top edge at its uppermost end, the third stage evaporator (3) includes a third top edge at its uppermost end, and the second top edge intersects with the third top edge at point Q; and the distance between point Q and point O is the self-sealing interference range (5), and the self-sealing interference range is greater than or equal to 20 mm.

2. The self-sealing heat exchanger according to claim 1, wherein: The second stage of the evaporator (2) and the third stage of the evaporator (3) are bent with each other to form a "V" - shaped structure, and the opening of the "V" - shaped structure is arranged upward; and / or, the self-sealing heat exchanger includes heat exchange tubes (7), fins and an evaporator side plate (9); and / or, the self-sealing heat exchanger is an evaporator.

3. The self-sealing heat exchanger according to claim 1, wherein: After the second stage of the evaporator (2) and the third stage of the evaporator (3) are bent with each other, the second inner side (21) and the third inner side (31) are arranged opposite to each other; and / or, it further includes a first stage of the evaporator (1), and the first stage of the evaporator (1) is connected to the end of the second stage of the evaporator (2) far from the third stage of the evaporator (3).

4. The self-sealing heat exchanger according to claim 3, wherein: The first stage of the evaporator (1) and the second stage of the evaporator (2) are also bent at the joint part between them, and the first stage of the evaporator (1) includes a first inner side (11) located on the inner side of the bend and a first outer side (12) located on the outer side of the bend, the second stage of the evaporator (2) includes a second outer side (23) located on the outer side of the bend, and the first outer side (12) is cut at the position of the bend.

5. The self-sealing heat exchanger according to claim 4, wherein: After the first outer side is cut at the bend, the most distal end point of the first outer side (12) in the horizontal direction away from the first inner side (11) is M, the most distal end point of the second outer side (23) in the horizontal direction away from the second inner side (21) is N, the distance between the end point M and the end point N in the horizontal direction is MN, and MN≥5mm.

6. An indoor air conditioner, characterized in that: The self-sealing heat exchanger according to any one of claims 1 - 5 further includes a blower (6) located inside the bend between the second stage of the evaporator (2) and the third stage of the evaporator (3).

7. An air conditioner, characterized in that: The air conditioner indoor unit includes the self-sealing heat exchanger according to any one of claims 1 - 5 or the self-sealing heat exchanger according to claim 6.

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