Air conditioning box assembly forming die

Abstract

The invention discloses an air handling unit assembly forming mold, relates to the technical field of molds, and aims to solve the technical problem of poor cooling effect during injection molding of an air handling unit shell. The air handling unit assembly forming mold comprises a lower mold, an upper mold is arranged above the lower mold, and a cavity for injection molding of the air handling unit shell is formed between the lower mold and the upper mold; the center of one side of the upper mold communicates with an injection molding material inlet, one side of the upper mold communicates with a cooling liquid inlet, and a cooling structure, a heat storage unit and a spoiler are arranged on the upper mold. Through the cooling channel imitating the bronchial shape, the contact area of a cooling medium and the channel wall is greatly increased, the convective heat exchange efficiency is enhanced, plastic melt is promoted to be uniformly solidified, impurities and bubbles in a cooling system can be effectively removed, the impurities and the bubbles are difficult to adhere and deposit in the changeable channel structure, and the cooling effect is improved. Local overheating or supercooling is avoided, long-term efficient heat dissipation of the cooling channel is guaranteed, the service life of the mold is prolonged, and the equipment maintenance cost caused by impurity bubbles is reduced.

Description

Technical Field

[0001] The present invention relates to the field of mold technology, and more specifically, to an air conditioning box assembly molding mold. Background Art

[0002] In the field of modern refrigeration equipment manufacturing, the air-conditioning box assembly is the core component of the air-conditioning system, and the molding quality of its shell directly affects the performance and reliability of the equipment. At present, the injection molding process has become the mainstream method for processing air-conditioning box shells with its advantages of high efficiency and precision, but the technical bottleneck of the cooling link seriously restricts the improvement of product quality. In order to meet the requirements of internal pipeline layout, component installation and aerodynamics, the air-conditioning box shell is often designed as a complex and irregular shape that is not positive or circular. During the injection molding process, the cooling system transports coolant through the cooling pipe to take away the heat of the mold to achieve rapid demolding and stable product size. However, due to the large diameter of the existing cooling pipe, it is difficult to fit the complex curved surface contour of the air-conditioning box shell tightly. This leads to a large distance between the local area of ​​the mold and the cooling pipe, and it is difficult for the coolant to effectively take away the heat, resulting in uneven cooling. For example, the corners, grooves, bosses and other structural parts of the shell become cooling blind spots because the cooling pipe cannot be fully approached. The solidification speed of the plastic melt in this area lags significantly behind other parts, causing defects such as uneven shrinkage and warping deformation. In severe cases, the shell size is out of tolerance, affecting the overall assembly accuracy and sealing of the air-conditioning box. In view of this, we propose an air conditioning box assembly molding die. Summary of the invention

[0003] The object of the present invention is to provide an air conditioning box assembly molding die to solve the technical problem of poor cooling effect when injection molding the air conditioning box shell.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: an air conditioning box assembly molding die, comprising a lower die, an upper die is arranged above the lower die, a cavity for injection molding the air conditioning box shell is arranged between the lower die and the upper die, an injection molding material inlet is connected to the center of one side of the upper die, and a coolant inlet is connected to one side of the upper die;

[0005] The coolant inlet is connected to a cooling structure arranged inside the upper mold, the cooling structure is in a shape that simulates the bronchi of human lungs, the cooling structure has a shape in which the diameter gradually decreases toward the cavity, the end portion of the cooling structure with the smallest diameter is arranged close to the periphery of the cavity, and the end area of ​​the cooling structure is provided with a plurality of detachably connected coolant outlets, and at least one heat storage unit is also provided on one side of the cavity, and the heat storage unit contains a phase change material that can absorb and release heat during the solid-liquid conversion process.

[0006] Preferably, the cooling structure includes a main liquid inlet pipe, a first-level branch channel, a second-level branch channel, a third-level branch channel, and a fourth-level branch channel. The diameters of the main liquid inlet pipe, the first-level branch channel, the second-level branch channel, the third-level branch channel, and the fourth-level branch channel decrease in sequence, the numbers increase in sequence, and they are connected to each other in the shape of a bronchus.

[0007] Preferably, the upper mold is assembled by multiple plates and fixed by bolts. The main liquid inlet pipe, the first-level branch channel, the second-level branch channel, the third-level branch channel, and the fourth-level branch channel are located at the corresponding positions of the plates.

[0008] Preferably, the heat storage unit includes multiple heat storage outer shells. The multiple heat storage outer shells are arranged on the outer periphery of the cooling structure. Connecting rods are connected between the multiple heat storage outer shells, and the phase change material is filled into the interior of the heat storage outer shells.

[0009] Preferably, a pipe inner layer is partially attached to the inner walls of the main liquid inlet pipe, the first-level branch channel, the second-level branch channel, the third-level branch channel, and the fourth-level branch channel. The pipe inner layer is made of a soft high-temperature resistant material. The inner wall of the pipe inner layer is a micro-textured surface with unevenness, and multiple notches are opened on the outer periphery of the second-level branch channel.

[0010] Preferably, a notch is opened on the part of the heat storage outer shell close to the notch. A soft wrapping layer is attached to the inner wall of the heat storage outer shell. The soft wrapping layer is in a ring shape and is made of a soft and elastic material. The soft wrapping layer wraps the phase change material.

[0011] Preferably, a top-tension structure is arranged between adjacent notches and notches. When the phase change material undergoes solid-liquid conversion, it presses against the top-tension structure and displaces.

[0012] Preferably, the top-tension structure includes a triangular wedge. The cross-section of the triangular wedge is triangular. One side of the triangular wedge is set as a rolling slope surface, and the rolling slope surface is attached to one side of the pipe inner layer. The other side of the triangular wedge is set as a top-tension surface, and the top-tension surface is attached to the soft wrapping layer. A rotating shaft rotatably connected to the heat storage outer shell is integrally formed at the top of the triangular wedge.

[0013] Preferably, the inside of the triangular wedge is a hollow cavity. A sliding cavity is opened on the rolling slope surface. A flow disturbing member is arranged on one side of the rolling slope surface. The flow disturbing member is composed of an annular arc part, an upper pressing arc part, and a lower pressing arc part. The annular arc part, the upper pressing arc part, and the lower pressing arc part are integrally formed.

[0014] Preferably, the annular arc part is in limit sliding with the rolling slope surface. The upper pressing arc part is above the lower pressing arc part, and the dimension of the upper pressing arc part towards the inner side of the center of the second-level branch channel pipe is larger than that of the lower pressing arc part.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The cooling structure of the mold of the present invention adopts a shape imitating the bronchi of the human lungs. Through the design that the diameters of the main liquid inlet pipe to the four-stage branch channels decrease in sequence and the numbers increase in sequence, the four-stage branch channels at the end can closely fit the complex curved surface of the air-conditioning box housing. Compared with the traditional large-diameter cooling pipes, this structure effectively reduces the distance between the mold and the cooling channels, eliminating the cooling blind spots at the corners, grooves and other parts of the air-conditioning box housing. At the same time, the variable diameter and multi-branch design increase the contact area between the cooling medium and the channel wall, enhancing the convective heat transfer efficiency, promoting the uniform solidification of the plastic melt, avoiding problems such as shrinkage deformation and dimensional tolerance caused by uneven cooling, greatly improving the forming quality and dimensional accuracy of the air-conditioning box housing, ensuring the overall assembly accuracy and sealing performance of the air-conditioning box, and solving the problem of poor cooling effect when injecting the air-conditioning box housing.

[0017] 2. The present invention also fills the internal heat storage unit arranged beside the cavity with a phase change material such as paraffin or eutectic salt, which can absorb or release a large amount of latent heat through solid-liquid transformation when the mold temperature changes. During the injection molding process, when the cavity temperature rises, the phase change material absorbs heat and melts, buffering the heat accumulation; when the temperature drops, the phase change material solidifies and releases heat to supplement the heat. This mechanism effectively reduces the temperature fluctuation of the mold, keeping the mold always within a suitable temperature range, avoiding the instability of product quality caused by large temperature fluctuations, ensuring the consistency of the quality of the air-conditioning box housing produced by each injection molding, improving the product qualification rate and production stability, and further solving the problem of poor cooling effect when injecting the air-conditioning box housing.

[0018] 3. The present invention also passes through the inner layer of the soft high-temperature resistant pipe attached to the inner wall of the cooling channel. The uneven micro-texture surface of it and the variable diameter pipe imitating the bronchi work together. By using the complex flow field, flow velocity shear force and surface tension gradient, impurities and bubbles in the cooling system can be effectively removed. It is difficult for impurities and bubbles to adhere and deposit in the variable channel structure, and they are carried away by the cooling medium, preventing them from accumulating in the channel to form a heat insulation layer or occupying space to affect heat transfer, avoiding local overheating or overcooling phenomena, ensuring the long-term efficient heat dissipation of the cooling channel, extending the service life of the mold, and reducing the equipment maintenance cost caused by impurities and bubbles.

[0019] 4. When the phase change material absorbs heat and changes from solid state to liquid state, the volume expansion is restricted by the heat storage outer shell. With the elastic cooperation of the soft wrapping layer, under the guidance of the notch and the gap, the triangular wedge of the top tension structure is pushed to rotate and move. The tilting slope surface of the triangular wedge gradually stretches the inner layer of the pipe inward, generating a dynamic turbulence effect in the cooling channel. This kind of turbulence can increase the contact frequency and disturbance degree between the cooling medium and the mold, greatly enhancing the internal heat exchange efficiency and promoting the faster dissipation of the mold heat. At the same time, the unstable flow field generated by the turbulence makes it difficult for impurities and bubbles to stay in the channel, further strengthening the self-cleaning effect, ensuring the high-efficiency heat dissipation performance of the cooling channel, and providing a strong guarantee for the uniform cooling of the air-conditioning box shell.

[0020] 5. The present invention also enables the turbulator to achieve autonomous reciprocating movement by virtue of the unique structural design of the turbulator and the high-speed flow of the cooling medium. Due to the size difference between the upper pressing arc part and the lower pressing arc part, when the cooling medium impacts, the turbulator will generate an action of alternately pressing the inner layer of the pipe, forming a turbulance effect with dynamic changes. This design without additional power, by cleverly utilizing the impact force of the cooling medium itself, further enhances the fluid disturbance in the cooling channel, significantly improves the heat exchange efficiency. At the same time, the turbulance with dynamic changes can effectively prevent impurities and bubbles from attaching or accumulating on the channel wall, continuously keeping the channel clean and maintaining the stable and efficient operation of the cooling system, ensuring an ideal cooling effect for the air-conditioning box shell during the injection molding process and improving the product molding quality.

[0021] 6. The present invention also adopts the method of assembling multiple plates and fixing them with bolts for the upper mold. The channels at all levels of the cooling structure are respectively arranged in the corresponding plates. This modular design makes the installation, replacement and maintenance of different levels of cooling channels more convenient. When a certain channel fails or it is necessary to adjust the cooling layout for different models of air-conditioning box shells, there is no need to disassemble the entire mold, and only the corresponding plate needs to be replaced, significantly reducing the maintenance time and cost, improving the versatility and production flexibility of the mold, and meeting the diverse production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the present invention;

[0023] Figure 2 is another axonometric structural schematic diagram of the present invention;

[0024] Figure 3 is a structural schematic diagram of the installation position of the cooling structure and the heat storage unit in the present invention;

[0025] Figure 4 is a structural schematic diagram of the cooling structure and the heat storage unit in the present invention;

[0026] Figure 5 is a structural schematic diagram of the cooling structure in the present invention;

[0027] Figure 6 Schematic diagram of the layout structure of the heat storage unit in the present invention;

[0028] Figure 7 Schematic diagram of the matching structure between the secondary branch channel and the heat storage housing in the present invention;

[0029] Figure 8 Schematic diagram of the structure of a single secondary branch channel in the present invention;

[0030] Figure 9 Schematic diagram of the structure of the heat storage housing in the present invention;

[0031] Figure 10 Schematic diagram of the half-sectional structure of the heat storage housing in the present invention;

[0032] Figure 11 Schematic diagram of the structure of the top tension structure in the present invention;

[0033] Figure 12 Schematic diagram of the movement of the top tension triangular wedge in the present invention;

[0034] Figure 13 Schematic diagram of the state during the fluctuation process of the flow disturbing member in the present invention;

[0035] Figure 14 Schematic diagram of the structure of the flow disturbing member in the present invention.

[0036] Description of the reference numerals in the figure:

[0037] 1. Lower mold; 2. Upper mold; 3. Injection plastic inlet; 4. Coolant inlet; 5. Cooling structure; 6. Coolant outlet; 7. Heat storage unit; 8. Top tension structure;

[0038] 501. Main liquid inlet pipe; 502. Primary branch channel; 503. Secondary branch channel; 504. Tertiary branch channel; 505. Quaternary branch channel; 506. Inner layer of the pipe; 507. Micro-textured surface; 508. Notch; 701. Heat storage housing; 702. Connecting rod; 703. Phase change material; 704. Notch; 705. Soft wrapping layer; 801. Triangular wedge; 802. Rolling slope; 803. Top tension surface; 804. Rotating shaft; 85. Flow disturbing member; 851. Circular arc part; 852. Upper pressing arc part; 853. Lower pressing arc part; 806. Sliding cavity. Detailed implementation manner

[0039] As Figures 1 to 14As shown in the figure, the present invention relates to a forming die for an air conditioning box assembly, which includes a lower die 1. An upper die 2 is arranged above the lower die 1. A cavity for injecting and molding the air conditioning box housing is provided between the lower die 1 and the upper die 2. A plastic injection inlet 3 is connected to the center of one side of the upper die 2. A coolant inlet 4 is connected to one side of the upper die 2. The coolant inlet 4 is connected to the main coolant system pipe outside. The coolant inlet 4 is connected to a cooling structure 5 arranged inside the upper die 2. The cooling structure 5 is in the shape of the bronchus of the human lung. The direction of the cooling structure 5 towards the cavity is in the shape of gradually decreasing diameter. The end part with the smallest diameter of the cooling structure 5 is arranged close to the outer periphery of the cavity. Its specific structure is as follows.

[0040] The cooling structure 5 includes a main liquid inlet pipe 501, a first-level branch channel 502, a second-level branch channel 503, a third-level branch channel 504 and a fourth-level branch channel 505. The diameters of the main liquid inlet pipe 501, the first-level branch channel 502, the second-level branch channel 503, the third-level branch channel 504 and the fourth-level branch channel 505 decrease in turn, the number increases in turn, and they are connected to each other in the shape of a bronchus. A plurality of detachably connected coolant outlets 6 are arranged in the end area of the cooling structure 5, that is, the fourth-level branch channel 505 section is communicated with the coolant outlet 6. With the diameter reduction and multi-branch design of the fourth-level branch channel 505, closer contact can be made with each part of the air conditioning box housing, making its cooling more uniform and rapid. The coolant outlet 6 is connected to the main coolant recovery pipe outside the die.

[0041] In order to achieve the convenience of installation, the upper die 2 is composed of a plurality of plates assembled and fixed by bolts. The main liquid inlet pipe 501, the first-level branch channel 502, the second-level branch channel 503, the third-level branch channel 504 and the fourth-level branch channel 505 are in the positions of the corresponding plates. Thus, through the modular design of a plurality of plates, the fixing of channels of different levels can be realized, achieving the effect of facilitating replacement, maintenance and installation.

[0042] Working principle: Through the multi-stage diameter-decreasing bronchus-like pipe design of the cooling structure 5, combined with the modular assembly of the upper die 2, the fourth-level branch channel 505 in the area close to the cavity at the end can fit more closely to the air conditioning box housing, making its cooling more uniform. At the same time, due to the variable diameter and multi-branch shunt design, the contact area between the cooling medium and the channel wall and the degree of disturbance are increased, making the flow of the cooling medium in the micro-channel more complex and efficient, strengthening the convective heat transfer. Compared with the cooling channel, it can take away the heat from the impeller forming part more quickly and efficiently, effectively reducing the local temperature and reducing product defects caused by overheating.

[0043] In order to further ensure the processing quality and ensure that the initial temperature of the die is within a certain range during each processing.

[0044] At least one heat storage unit 7 is also provided on one side of the cavity. For the purpose of showing the structure, one is provided on the secondary branch channel 503 in this design. In actual production, more should be set at the positions between the mold closing areas of different plates of the upper mold 2.

[0045] The heat storage unit 7 includes a plurality of heat storage outer shells 701. The plurality of heat storage outer shells 701 are arranged on the outer periphery of the cooling structure 5. Connecting rods 702 are connected between the plurality of heat storage outer shells 701. A phase change material 703 is provided inside the heat storage outer shell 701. The phase change material 703 is selected as paraffin or eutectic salt. Such materials will undergo a phase change at a specific temperature, absorbing or releasing a large amount of latent heat. Heat absorption and heat release occur during the solid-liquid conversion process of the phase change material 703.

[0046] Working principle: During the injection molding process, when the temperature of the mold cavity rises, the phase change material 703 begins to absorb heat and undergoes a phase change, changing from a solid state to a liquid state. This process absorbs a large amount of heat, enhancing the cooling effect and at the same time playing a role in buffering and stabilizing the mold temperature. When the mold temperature drops, the phase change material 703 changes from a liquid state to a solid state again, releasing the stored heat. In this way, the phase change material 703 can effectively reduce the fluctuation range of the mold temperature, make the mold temperature more stable, and avoid product quality instability problems caused by temperature fluctuations.

[0047] Among them, during the long-term operation of the microchannel heat dissipation system of the mold, the internal components of the system will wear. For example, after the seal at the connection between the microchannel insert and the cooling pipe wears, impurities such as rubber debris will be generated. In addition, under the long-term scouring of the coolant, the metal material on the inner wall of the pipe may corrode, generating impurity particles such as metal oxides, entering the cooling medium and flowing in the channel. And the tiny leakage points caused by component wear will allow external air to enter the cooling system, forming bubbles. If the impurity particles adhere to the inner wall of the microchannel, an insulating layer will be formed. As the impurity layer thickens, the mold temperature will gradually rise and heat cannot be effectively dissipated. The bubbles occupy a certain space in the microchannel, reducing the contact area between the cooling medium and the channel wall. Since the thermal conductivity of the gas is much lower than that of the liquid cooling medium, the heat transfer efficiency in the area where the bubbles are located is greatly reduced, causing local overheating or overcooling. Driven by the high-speed flowing cooling medium, the impurity particles continuously impact the channel wall, which will gradually damage the surface of the channel wall and reduce the service life.

[0048] It is worth introducing that, in view of the above, in order to avoid internal residual bubbles and impurities, a pipe inner layer 506 is partially attached to the inner walls of the main liquid inlet pipe 501, the primary branch channel 502, the secondary branch channel 503, the tertiary branch channel 504, and the quaternary branch channel 505. The pipe inner layer 506 is made of a soft high-temperature resistant material, and the inner wall of the pipe inner layer 506 is a micro-textured surface 507 with unevenness.

[0049] Working principle: The uneven micro-textured surface 507 cooperates with the variable-diameter pipe design imitating the bronchial morphology described above. First of all, the diameter, length and angle of the channel change continuously. This complex structure makes the flow state of the cooling medium in the channel extremely complex, forming various vortices, secondary flows, etc.; when impurities and bubbles enter the channel, they will be affected by these complex flow fields. It is difficult for impurities and bubbles to stay in a relatively stable position, but are carried forward by the fast-flowing cooling medium and finally carried out of the channel. Secondly, the multi-stage branched channel structure greatly increases the degree of flow perturbation, and the flow velocity differences in different regions are relatively large. The shear force generated by this flow velocity non-uniformity can continuously impact the impurities and bubbles that may adhere to the channel wall and carry them out;

[0050] Finally, due to the action of the surface tension gradient, the microscopic geometry of the micro-textured surface 507 will cause the surface tension to be unevenly distributed on the channel wall, forming a surface tension gradient; when impurities or bubbles approach the micro-textured surface 507, the surface tension gradient will generate a force that makes the impurities and bubbles move towards the region with higher surface tension. Since the flow direction of the fluid in the channel is usually towards the outlet, the region with higher surface tension is often downstream of the fluid flow direction, that is, towards the pipe orifice with a smaller diameter. This promotes the impurities and bubbles to move along the fluid flow direction and prevents them from accumulating in the channel, thereby achieving the effect of self-cleaning of the internal pipe.

[0051] In order to further improve the heat transfer and self-cleaning effects, a plurality of notches 508 are provided on the outer periphery of the secondary branch channel 503. In order not to affect heat transfer, the inner pipe layer 506 is only provided in the region of the notches 508. The above-mentioned inner pipe layer 506 is mainly arranged according to the quantity and position of the heat storage units 7. At the same time, a notch 704 is provided in the part of the heat storage outer shell 701 close to the notch 508. A soft wrapping layer 705 is attached to the inner wall of the heat storage outer shell 701. The soft wrapping layer 705 is in an annular shape and is made of a soft and elastic material. The soft wrapping layer 705 wraps the phase change material 703. The soft wrapping layer 705 is a silicone rubber material with high elasticity and certain heat conductivity. Its heat conductivity can reach 30%-40% of that of copper alloy, and it has good flexibility and can undergo elastic deformation to a certain extent.

[0052] A top-tension structure 8 is arranged between adjacent notches 704 and notches 508. When the phase change material 703 undergoes solid-liquid conversion, it presses against the top-tension structure 8 to displace. The top-tension structure 8 includes a triangular wedge 801. The cross-section of the triangular wedge 801 is triangular. One side of the triangular wedge 801 is provided with a rolling slope 802, and the rolling slope 802 is attached to one side of the inner pipe layer 506. The other side of the triangular wedge 801 is provided with a top-tension surface 803, and the top-tension surface 803 is attached to the soft wrapping layer 705. A rotating shaft 804 rotatably connected to the heat storage outer shell 701 is integrally formed at the top of the triangular wedge 801.

[0053] Working principle: When the phase change material 703 starts to absorb heat and undergoes a phase change, from solid state to liquid state, its own volume will increase. Due to the limitation of the hard outer shell of the heat storage outer shell 701, combined with the wrapping of the soft elastic material of the soft wrapping layer 705, and further combined with the communication and guidance of the notch 704 and the gap 508, the expanded part will push the top tension surface 803 to move, causing the overall rotation and displacement of the triangular wedge 801, making the rolling slope 802 move and the inner tube layer 506 gradually extend inward, generating a dynamic turbulent flow effect, further strengthening the internal heat exchange. Moreover, the turbulent flow effect prevents impurities and bubbles in the surrounding area from stagnating, further enhancing the self-cleaning effect.

[0054] The above-mentioned turbulent flow is achieved through the state transformation of the phase change material 703, and its dynamic process is relatively long. To further enhance the dynamic turbulent flow effect, the inside of the triangular wedge 801 is a hollow cavity. A sliding cavity 806 is opened on the rolling slope 802, and a turbulent flow member 85 is arranged on one side of the rolling slope 802. The turbulent flow member 85 includes an arc portion 851, an upper pressing arc portion 852, and a lower pressing arc portion 853. The arc portion 851, the upper pressing arc portion 852, and the lower pressing arc portion 853 are integrally formed. The arc portion 851 is in limited sliding contact with the rolling slope 802. The upper pressing arc portion 852 is above the lower pressing arc portion 853, and the dimension of the upper pressing arc portion 852 facing the inner side of the center of the secondary branch channel 503 is larger than that of the lower pressing arc portion 853.

[0055] Working principle: When the cooling medium flows at a high speed, since the dimension of the upper pressing arc portion 852 is larger than that of the lower pressing arc portion 853, it will first come into contact with and press against the inner tube layer 506. At the same time, the impact force of the cooling medium flowing at a high speed will impact the upper pressing arc portion 852 to move towards the side. During this process, with the limited sliding of the arc portion 851 and the rolling slope 802, the lower pressing arc portion 853 will move towards the central region and press against the inner tube layer 506 (such as Figures 12 - 13 the position change of the turbulent flow member 85). At this time, the impact force of the cooling medium flowing at a high speed acts on the slope surface of the lower pressing arc portion 853, causing it to move in the reverse direction again. Thus, as described above, reciprocating movement can be generated, which can produce dynamically changing pressing against different positions of the inner tube layer 506, making the dynamic turbulent flow effect better. Moreover, its design is ingenious and does not require additional power. It can be achieved through the design of a special shape and the self-cooling medium.

[0056] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. An air conditioner box assembly forming die, characterized in that It includes a lower mold (1), an upper mold (2) is arranged above the lower mold (1), a cavity for injecting and molding an air-conditioning box shell is provided between the lower mold (1) and the upper mold (2), a plastic injection inlet (3) is connected to the center of one side of the upper mold (2), and a coolant inlet (4) is connected to one side of the upper mold (2); The coolant inlet (4) is connected to a cooling structure (5) arranged inside the upper mold (2). The cooling structure (5) is in the shape of the bronchus of the human lung. The cooling structure (5) is in a shape with a gradually decreasing diameter towards the cavity direction. The end part with the smallest diameter of the cooling structure (5) is arranged close to the outer periphery of the cavity. A plurality of detachably connected coolant outlets (6) are arranged in the end area of the cooling structure (5). At least one heat storage unit (7) is also arranged on one side of the cavity. The heat storage unit (7) contains a phase change material (703) that can absorb and release heat during the solid-liquid conversion process.

2. The forming die for an air conditioner box assembly according to claim 1, wherein The cooling structure (5) includes a main liquid inlet pipe (501), a first-level branch channel (502), a second-level branch channel (503), a third-level branch channel (504) and a fourth-level branch channel (505). The diameters of the main liquid inlet pipe (501), the first-level branch channel (502), the second-level branch channel (503), the third-level branch channel (504) and the fourth-level branch channel (505) decrease in sequence, the number increases in sequence, and they are connected to each other in the shape of the bronchus.

3. The forming die for an air conditioner box assembly according to claim 2, characterized in that, The upper mold (2) is assembled by a plurality of plates and fixed by bolts. The main liquid inlet pipe (501), the first-level branch channel (502), the second-level branch channel (503), the third-level branch channel (504) and the fourth-level branch channel (505) are in the positions corresponding to the plates.

4. The forming die for an air conditioner box assembly according to claim 3, characterized in that The heat storage unit (7) includes a plurality of heat storage outer shells (701). The plurality of heat storage outer shells (701) are arranged on the outer periphery of the cooling structure (5). Connecting rods (702) are connected between the plurality of heat storage outer shells (701). The phase change material (703) is filled into the inside of the heat storage outer shells (701).

5. The forming die for an air conditioning box assembly according to claim 4, characterized in that Part of the inner walls of the main liquid inlet pipe (501), the first-level branch channel (502), the second-level branch channel (503), the third-level branch channel (504) and the fourth-level branch channel (505) are attached with an inner pipe layer (506). The inner pipe layer (506) is made of a soft high-temperature resistant material. The inner wall of the inner pipe layer (506) is a micro-textured surface (507) with unevenness. A plurality of notches (508) are opened on the outer periphery of the second-level branch channel (503).

6. The forming die for an air-conditioning box assembly according to claim 5, characterized in that A notch (704) is opened on the part of the heat storage outer shell (701) close to the notch (508). A soft wrapping layer (705) is attached to the inner wall of the heat storage outer shell (701). The soft wrapping layer (705) is in a ring shape and is made of a soft and elastic material. The soft wrapping layer (705) wraps the phase change material (703).

7. The forming die for an air conditioner box assembly according to claim 6, wherein, A top-tension structure (8) is arranged between adjacent notches (704) and notches (508). When the phase change material (703) undergoes solid-liquid conversion, it presses against the top-tension structure (8) and displaces.

8. The forming die for an air conditioner box assembly according to claim 7, characterized in that, The top tension structure (8) includes a triangular wedge block (801). The cross-section of the triangular wedge block (801) is triangular. One side of the triangular wedge block (801) is provided with a rolling slope surface (802), and the rolling slope surface (802) is attached to one side of the inner layer of the pipe (506). The other side of the triangular wedge block (801) is provided with a top tension surface (803), and the top tension surface (803) is attached to the soft wrapping layer (705). A rotating shaft (804) rotatably connected to the heat storage outer shell (701) is integrally formed at the top of the triangular wedge block (801).

9. The forming die for an air-conditioning box assembly according to claim 8, characterized in that, The interior of the triangular wedge block (801) is a hollow cavity. A sliding cavity (806) is formed on the rolling slope surface (802). A flow disturbing member (85) is arranged on one side of the rolling slope surface (802). The flow disturbing member (85) is composed of an annular arc portion (851), an upper pressing arc portion (852), and a lower pressing arc portion (853). The annular arc portion (851), the upper pressing arc portion (852), and the lower pressing arc portion (853) are integrally formed with each other.

10. The forming die for an air conditioner box assembly according to claim 9, characterized in that, The annular arc portion (851) is in limit sliding connection with the rolling slope surface (802). The upper pressing arc portion (852) is located above the lower pressing arc portion (853). The dimension of the upper pressing arc portion (852) towards the inner side of the center of the secondary branch channel (503) is larger than that of the lower pressing arc portion (853).

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