Evaporator assembly core sponge assembly device
By introducing limit support, sponge detection and expansion valve position detection mechanisms during the assembly of the evaporator assembly, the problems of missing installation, misalignment of core sponges and difficulty in identifying models in the existing technology are solved, and efficient and automated evaporator assembly is suitable for the production of different models of evaporator assembly.
Patent Information
- Application Number
- CN201911311613.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-12-18
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2039-12-18
AI Technical Summary
The existing evaporator assembly lacks locking and positioning devices, resulting in misinstallation of core sponges, wrongly pasted position, wrong expansion valve position and difficult to identify the model. The equipment cost is high, so it cannot effectively adapt to different models of evaporator assembly. .
A core sponge assembly device including a limit support mechanism, a sponge detection mechanism and an expansion valve position detection mechanism is designed. The limit support mechanism ensures the accurate adhesion of the core sponge, and the sponge detection mechanism detects whether the sponge is leaked, and the expansion valve is expanded. The position detection mechanism calibrates the expansion valve position and identifies the model through sensors and PLCs to achieve automated assembly and replacement functions.
It improves assembly efficiency, ensures the accurate assembly of core sponges and the correctness of expansion valve position, realizes automatic production of different types of evaporator assembly, and reduces equipment costs.
Smart Images
Figure CN110842846B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of automobile cooling systems, in particular to an evaporator assembly core sponge assembly device. Background Art
[0002] Evaporator assembly (such as Figure 1 ) is composed of an evaporator core 0.1, a high-pressure pipe 0.2, a low-pressure pipe 0.3, an expansion valve 0.4 and a core sponge 0.5. Among them, the high-pressure pipe 0.2 and the low-pressure pipe 0.3 are welded to the evaporator core 0.1 by brazing, the expansion valve 0.4 is installed on the high-pressure pipe 0.2 and the low-pressure pipe 0.3, and the core sponge 0.5 is pasted on the evaporator core 0.1.
[0003] The core sponge 0.5 is pasted on the evaporator core 0.1. The assembly points are: evaporator cores 0.1, high pressure 0.2, low pressure pipe 0.3, expansion valve 0.4 and core sponge 0.5 of different sizes and shapes can form evaporator assemblies of different models, and the evaporator model needs to be error-proofed; the expansion valve 0.4 involves docking and installation with the vehicle end, and its position accuracy has high requirements, so we need to detect and calibrate the position of the expansion valve 0.4 to ensure its accurate position when docking and installing with the vehicle; the core sponge 0.5 plays a sealing role between the evaporator assembly and the inside of the air-conditioning shell, avoiding the evaporator assembly from vibrating inside the shell and generating noise, so the core sponge 0.5 needs to be designed to prevent missing installation and incorrect positioning.
[0004] The existing assembly method is: place the evaporator (evaporator core 0.1, high-pressure pipe 0.2, low-pressure pipe 0.3 and expansion valve 0.4) flat on a simple platform to paste the core sponge 0.5. This assembly method has no locking, no positioning device, no detection of the evaporator model, no core sponge 0.5 missing installation error prevention and expansion valve 0.4 position detection and calibration. There are the following risks: core sponge 0.5 missing installation, wrong pasting position; risk of wrong expansion valve 0.4 position; wrong evaporator core 0.1 model. In addition, because there are many types and models of evaporator assemblies, if each type of evaporator assembly is invested in corresponding tooling equipment, the equipment cost will be high. Summary of the invention
[0005] In order to solve the above problems, the present invention provides an evaporator assembly core sponge assembly device, which can accurately stick the core sponge to the evaporator core and has high assembly efficiency.
[0006] The technical solution adopted by the present invention is: an evaporator assembly core sponge assembly device, characterized in that it includes a bottom plate and a limit support mechanism arranged on the bottom plate for limiting the support of the evaporator core, the limit support mechanism includes a front support plate, a rear support plate, a left support plate, a right support plate and a lower support plate, the front support plate is located on the side of the evaporator core where the high-pressure pipe and the low-pressure pipe are installed, the rear support plate and the front support plate are on the opposite side of the evaporator core; the left support plate is on the side of the evaporator core where the expansion valve is installed, the right support plate and the left support plate are on the opposite side of the evaporator core; the lower support plate is at the bottom of the evaporator core;
[0007] A gap for installing the core sponge is provided between the front support plate and the right support plate, and a first sponge pad for placing the core sponge is provided in the gap; a gap for installing the core sponge is provided on the left support plate, and a locking mechanism for locking the evaporator core is provided on the rear support plate.
[0008] Preferably, the first sponge pad and the supporting bottom plate are both provided with grooves for placing the core sponge.
[0009] Preferably, a sensor for detecting whether the evaporator core is in place is provided on the lower support plate.
[0010] Preferably, a sponge detection mechanism for detecting whether the core sponge is missing is provided on the bottom plate.
[0011] Furthermore, the sponge detection mechanism includes a sponge detection sensor, a sensor bracket, a support rod and a base, the base is fixedly mounted on the bottom plate, the support rod is mounted on the base, and the sponge detection sensor is mounted on the support rod via the sensor bracket.
[0012] Preferably, an expansion valve position detection mechanism for detecting whether the expansion valve is correctly installed is provided on the bottom plate.
[0013] Further, the expansion valve position detection mechanism includes an expansion valve profiling block, a slider connecting plate, a slider, a slide rail and an expansion valve profiling block mounting plate, wherein the expansion valve profiling block is fixed to the expansion valve profiling block mounting plate, the expansion valve profiling block mounting plate is fixed to the slider connecting plate, the slider connecting plate is fixed to the slider, and the slider is mounted on the slide rail. The handle is mounted on the handle mounting plate.
[0014] Furthermore, both ends of the slide rail are provided with in-position sensors and limit blocks.
[0015] Preferably, the rear support plate is provided with a mold changing mechanism, the first sponge pad is provided with a second sponge pad cooperating with the mold changing mechanism, and the second sponge pad is provided with a groove for placing the core sponge.
[0016] Furthermore, the mold changing mechanism includes a mold changing base plate, a connecting plate, a mold changing cylinder and a cylinder mounting plate. The mold changing cylinder is fixedly arranged on the rear support plate through the cylinder mounting plate. The mold changing base plate is connected to the mold changing cylinder through the connecting plate. The mold changing cylinder drives the mold changing base plate to extend out from the square hole of the rear support plate to support the bottom of the evaporator core.
[0017] The beneficial effects achieved by the present invention are as follows: a limit support mechanism is provided on the bottom plate to limit the evaporator core, a locking mechanism is provided on the rear support plate to lock the evaporator core, gaps for installing the core sponge are provided between the front support plate and the right support plate, and on the support plate, and the sponge pad provides limit support for the core sponge. The above structure ensures that the core sponge can be accurately assembled with the evaporator core, and the assembly efficiency is high. The present invention also has the following advantages:
[0018] (1) Use the sponge detection sensor on the sponge detection mechanism to detect whether the core sponge is missing, ensuring that the core sponge is not missing and the assembly position is correct;
[0019] (2) Use the expansion valve profiling block on the expansion valve position detection mechanism to detect whether the expansion valve is correctly installed to ensure that the expansion valve is in the correct position;
[0020] (3) A sensor is arranged on the lower support plate and connected to the sensor through a PLC to detect whether the evaporator core is in place and to identify different types of evaporator cores;
[0021] (4) The present invention has a high degree of automation and can realize the model change function, and is suitable for producing evaporator assemblies of different models. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is a structural schematic diagram of an evaporator assembly;
[0023] Figure 2 It is a structural schematic diagram of the core sponge assembly device of the present invention;
[0024] Figure 3 is a schematic structural diagram of a second sponge pad;
[0025] Figure 4 is a schematic structural diagram of a first front support plate;
[0026] Figure 5 is a schematic structural diagram of a second front support plate;
[0027] Figure 6 is a structural schematic diagram of the lower support plate;
[0028] Figure 7 is a structural schematic diagram of the rear support plate;
[0029] Figure 8 It is a structural schematic diagram of the left support plate;
[0030] Fig. 9 is a structural schematic diagram of the locking mechanism;
[0031] Fig.10 It is a structural schematic diagram of the type-changing mechanism;
[0032] Fig.11 It is a structural schematic diagram of the sponge detection mechanism;
[0033] Fig.12 It is a structural schematic diagram of the expansion valve position detection mechanism;
[0034] 1. Evaporator core; 2. High-pressure pipe; 3. Low-pressure pipe; 4. Expansion valve; 5. Coreless sponge; 1. Bottom plate; 2. First front support plate; 2.1. First front support reinforcement plate; 3. Lower support plate; 3.1. Core detection sensor; 4. Second front support plate; 4.1. Sponge right limit plate; 4.2. Second front support reinforcement plate; 5. Right support plate; 6. First sponge pad; 7.2. Second sponge pad; 7.1. Support pin; 8. Changing mechanism; 8.1. Changing bottom plate; 8.2. Connecting plate; 8.3. Changing cylinder; 8.4. Cylinder mounting plate; 9. Rear support plate; 9.1. Core detection sensor; 10. Locking mechanism; 10.1. Locking cylinder; 10.2. Locking Pressure block; 10.3, locking mounting plate; 11, left supporting plate; 11.1, core left supporting plate; 11.2, left supporting reinforcing plate; 11.3, fixed bottom plate; 11.4, sponge left limiting plate; 12, sponge detection mechanism; 12.1, sponge detection sensor; 12.2, sensor bracket; 12.3, supporting rod; 12.4, base; 13, expansion valve position detection mechanism; 13.1, expansion valve profiling block; 13.2, reinforcing rib plate; 13.3, slider connecting plate; 13.4, sensor mounting plate; 13.5, in-position sensor; 13.6, limiting block; 13.7, slider; 13.8, slide rail; 13.9, handle; 13.10, handle mounting plate; 13.11, expansion valve profiling block mounting plate. DETAILED DESCRIPTION
[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0036] like Figure 1As shown, the evaporator assembly consists of an evaporator core 0.1, a high-pressure pipe 0.2, a low-pressure pipe 0.3, an expansion valve 0.4 and a core sponge 0.5, wherein: the high-pressure pipe 0.2 and the low-pressure pipe 0.3 are welded to the evaporator core 0.1 by brazing, the expansion valve 0.4 is installed on the high-pressure pipe 0.2 and the low-pressure pipe 0.3, and the core sponge 0.5 is pasted on the evaporator core 0.1.
[0037] like Figure 2 As shown, an evaporator assembly core sponge assembly device of the present invention is used to stick the core sponge 0.5 to the evaporator core 0.1, including a base plate 1 and a limiting support mechanism arranged on the base plate 1 for limiting the support of the evaporator core 0.1.
[0038] In this embodiment, the limit support mechanism includes a front support plate, a rear support plate 9, a left support plate 11, a right support plate 5 and a lower support plate 3. The lower support plate 3 is used to support the bottom of the evaporator core 0.1, and the front support plate, the rear support plate 9, the left support plate 11, and the right support plate 5 respectively support the front, back, left and right limits of the evaporator core 0.1. The front support plate is located on the side of the evaporator core where the high-pressure pipe 0.2 and the low-pressure pipe 0.3 are installed. The rear support plate 9 and the front support plate are on the opposite side of the evaporator core 0.1. The rear support plate 9 and the front support plate cooperate with each other to clamp the front and rear sides of the evaporator core 0.1; the left support plate 11 is on the side of the evaporator core 0.1 where the expansion valve 0.4 is installed. The right support plate 5 and the left support plate 11 are on the opposite side of the evaporator core 0.1. The right support plate 5 and the left support plate 11 cooperate with each other to clamp the left and right sides of the evaporator core 0.1; the lower support plate 3 is at the bottom of the evaporator core 0.1, and holds the bottom of the evaporator core 0.1, combined with Figure 6 Two core detection sensors 3.1 are installed near the two ends of the lower support plate 3 to detect whether the evaporator core 0.1 is in place and identify the model of the evaporator core 0.1. A groove is opened on the lower support plate 3 to limit the core sponge 0.5 to ensure that the core sponge 0.5 is pasted in the correct position at the bottom of the evaporator core 0.1, wherein the width and depth of the groove are designed according to the width and thickness of the core sponge 0.5 to accommodate different models of core sponges 0.5. The lower support plate 3 is fixed to the base plate 1 by two bolts.
[0039] There is a gap between the front support plate and the right support plate 5 for installing the core sponge 0.5. The gap is provided with a first sponge pad 6 for placing the core sponge 0.5. The first sponge pad 6 is fixed to the right surface of the bottom plate 1 by a rotating pin. A groove is provided on the first sponge pad 6 for supporting and limiting the core sponge 0.5. The width of the groove is designed according to the width of the core sponge 0.5. When assembling the core sponge 0.5, its right end is aligned with the right end surface of the first sponge pad 6 to ensure the consistency of the position of the core sponge 0.5; a gap is provided on the left support plate 11 for installing the core sponge 0.5. The rear support plate 9 is provided with a locking mechanism 10 for locking the evaporator core 0.1.
[0040] In this embodiment, the front support plate adopts a split structure, including a first front support plate 2 arranged on the left side of the front end of the evaporator core 0.1 and a second front support plate 4 arranged on the right side of the front end of the evaporator core 0.1. Figure 5 The second front support plate 4 is provided with a sponge right limit plate 4.1 and a second front support reinforcement plate 4.2. The second front support reinforcement plate 4.2 is fixed between the second front support plate 4 and the bottom plate 1 to strengthen the support strength of the second front support plate 4. The sponge right limit plate 4.1 and the side of the right support plate 5 form a gap whose size is just equal to the width of the core sponge 0.5. The core sponge 0.5 is limited by this gap to ensure that it is pasted in the correct position on the right side of the evaporator core 0.1. The gap size can be changed by adjusting the thickness of the sponge right limit plate 4.1 or the width of the right support plate 5 to adapt to different models of core sponges 0.5. Figure 4 A first front support reinforcing plate 2.1 is provided between the first front support plate 2 and the bottom plate 1 to enhance the support strength of the first front support plate 2.
[0041] Combination Figure 7 The rear support plate 9 is provided with a core detection sensor 9.1, which is used to detect whether the evaporator core 0.1 is correctly installed and identify the model of the evaporator core 0.1. By adjusting the distance between the rear support plate 9 and the front support plate (the first front support plate 2 and the second front support plate 4), the device can be applied to evaporator cores 0.1 of different thicknesses.
[0042] Combination Figure 8The left support plate 11 comprises a core left support plate 11.1, a left support reinforcement plate 11.2, a fixed bottom plate 11.3 and a sponge left limit plate 11.4. The left support reinforcement plate 11.2 is fixed on the core left support plate 11.1. The core left support plate 11.1 is fixed on the upper surface of the fixed bottom plate 11.3. The sponge left limit plate 11.4 is fixed on the side of the fixed bottom plate 11.3. The fixed bottom plate 11.3 is fixed on the bottom plate 1. A left support reinforcement plate 11.2 is provided between the fixed bottom plate 11.3 and the core left support plate 11.1 to enhance the supporting strength of the core left support plate 11.1. By adjusting the distance between the left support plate 11 and the right support plate 5, the device can be adapted to evaporator cores 0.1 with different core widths. A distance that is just equal to the width of the core sponge 0.5 is formed between the core left support plate 11.1 and the sponge left limit plate 11.4. The core sponge 0.5 is limited by this distance to ensure that it is pasted in the correct position on the left side of the evaporator core 0.1. The distance size can be changed by adjusting the thickness of the sponge left limit plate 11.4 or the width of the core left support plate 11.1 to adapt to different models of core sponges 0.5.
[0043] like Fig.11 As shown, a sponge detection mechanism 12 for detecting whether the core sponge 0.5 is missing is provided on the bottom plate 1. In this embodiment, the sponge detection mechanism 12 includes a sponge detection sensor 12.1, a sensor bracket 12.2, a support rod 12.3 and a base 12.4. The sponge detection sensor 12.1 is mounted on the sensor bracket 12.2, the sensor bracket 12.2 is mounted on the support rod 12.3 and can be adjusted in angle and height, the support rod 12.3 is mounted on the base 12.4, and the base 12.4 is fixed on the bottom plate 1. When working, the sponge detection sensor 12.1 detects whether the core sponge 0.5 is missing.
[0044] like Fig.12As shown, the bottom plate 1 is provided with an expansion valve position detection mechanism 13 for detecting whether the expansion valve 0.4 is correctly installed. In this embodiment, the expansion valve position detection mechanism 13 includes an expansion valve profiling block 13.1, a reinforcing rib plate 13.2, a slider connecting plate 13.3, a sensor mounting plate 13.4, an in-position sensor 13.5, a limit block 13.6, a slider 13.7, a slide rail 13.8, a handle 13.9, a handle mounting plate 13.10 and an expansion valve profiling block mounting plate 13.11. The expansion valve profiling block 13.1 is fixed on the expansion valve profiling block mounting plate 13.11, the expansion valve profiling block mounting plate 13.11 is fixed on the slider connecting plate 13.3, the reinforcing rib plate 13.2 is connected to the expansion valve profiling block mounting plate 13.11 and the slider connecting plate 13.3, so as to increase the connection strength; the slider connecting plate 13.3 is fixed on the slider 13.7, and the slider 13.7 slides on the slide rail 13.8. The handle 13.9 is mounted on the handle mounting plate 13.10, and the handle mounting plate 13.10 is mounted on the expansion valve profiling block mounting plate 13.11, so as to facilitate pushing the expansion valve profiling block mounting plate 13.11. Two sensor mounting plates 13.4 are mounted at both ends of the slide rail 13.8, and the sensor mounting plate 13.4 is mounted with an in-position sensor 13.5 and a limit block 13.6.
[0045] When working, the handle 13.9 is pushed rightward along the slide rail 13.8, driving the expansion valve profiling block 13.1 to move rightward. When it moves to the working position, the limit block 13.6 blocks the slider connecting plate 13.3 for limiting and the in-position sensor 13.5 transmits the in-position signal to the PLC program. At this time, the expansion valve 0.4 will be wrapped in the profiling cavity of the expansion valve profiling block 13.1. The structure of the expansion valve profiling block 13.1 can be designed according to the expansion valve 0.4 of different shapes and positions, so that the device can detect and calibrate the expansion valve 0.4 of different shapes and positions.
[0046] Combination Figure 1 , Figure 3 and Fig.10 , a change-over mechanism 8 is provided on the rear support plate 9, and a second sponge pad 7 cooperating with the change-over mechanism 8 is provided on the first sponge pad 6. When changing the shape, two support pins 7.1 on the second sponge pad 7 are inserted into two pin holes on the first sponge pad 6. The second sponge pad 7 has a groove for supporting and limiting the core sponge 0.5. The width of the groove is designed according to the width of the core sponge 0.5. When assembling the core sponge 0.5, its right end is aligned with the right end surface of the second sponge pad 7 to ensure the consistency of the position of the core sponge 0.5.
[0047] The mold changing mechanism comprises a mold changing base plate 8.1, a connecting plate 8.2, a mold changing cylinder 8.3 and a cylinder mounting plate 8.4. The mold changing cylinder 8.3 is fixedly arranged on the rear support plate 9 through the cylinder mounting plate 8.4. The mold changing base plate 8.1 is connected to the mold changing cylinder 8.3 through the connecting plate 8.2. The mold changing cylinder 8.3 drives the mold changing base plate 8.1 to extend out from the square hole of the rear support plate 9 to support the bottom of the evaporator core 0.1.
[0048] The upper and lower positions of the holes on the rear support plate 9 and the thickness of the cylinder mounting plate 8.4 can be designed according to the core height of the evaporator core 0.1 to adjust the upper and lower positions of the changeable bottom plate 8.1, so that the device can adapt to evaporator cores 0.1 with different core heights.
[0049] In this embodiment, the mold-changing bottom plate 8.1 is stepped, wherein the lower step surface is used to position and support the core sponge 0.5. By adjusting the height and width of the lower step surface, the mold-changing bottom plate 8.1 can position and support the core sponges 0.5 of different widths and thicknesses.
[0050] Combination Fig. 9 As shown, the locking mechanism 10 includes a locking cylinder 10.1, a locking pressure block 10.2 and a locking mounting plate 10.3. The locking pressure block 10.2 is mounted on the locking cylinder 10.1, and the locking cylinder 10.1 is mounted on the locking mounting plate 10.3. The locking mechanism 10 is mounted on the rear support plate 9. When the core detection sensor 3.1 on the lower support plate 3 or the core detection sensor 9.2 on the rear support plate 9 detects that the evaporator core 0.1 is placed in place, the locking cylinder 10.1 drives the locking pressure block 10.2 to extend from a circular hole on the rear support plate 9 to press and lock the evaporator core 0.1.
[0051] The working principle of the present invention is as follows: the production procedure is selected according to the type of product actually produced, at which time the mold-changing cylinder 8.3 drives the mold-changing bottom plate 8.1 to extend or retract from the square hole of the rear support plate 9; the core sponge 0.5 is peeled off the adhesive paper and placed on the lower support plate 3 and the first sponge pad 6 (or the second sponge pad 7.1 and the mold-changing bottom plate 8.1), and the right end face of the core sponge 0.5 is aligned with the right end face of the first sponge pad 6 (or the right end face of the second sponge pad 7.1); the evaporator core 0.1 is placed in the tooling, and the core detection sensor 3.1 (or the core detection sensor 9.2) senses that the evaporator core 0.1 is placed in place Afterwards, the locking cylinder 10.1 drives the locking pressure block 10.2 forward to press the evaporator core 0.1; the core sponge 0.5 is pasted on the right side of the evaporator core 0.1 along the gap formed by the right sponge limit plate 4.1 and the right support plate 5; the core sponge 0.5 is pasted on the left side of the evaporator core 0.1 along the gap formed by the left sponge limit plate 11.4 and the left core support plate 11.1; the handle 13.9 is pushed rightward to drive the slider connecting plate 13.3 to move rightward, and when the slider connecting plate 13.3 contacts the limit block 13.6, the expansion valve profiling block 13.1 completely covers the expansion valve 0.4 to confirm that the position of the expansion valve 0.4 is correct. At this time, the in-position sensor 13.5 receives the in-position signal, and the sponge detection sensor 12.1 starts to detect whether the core sponge 0.5 exists; after the sponge detection sensor 12.1 detects the core sponge 0.5, the locking cylinder 10.1 drives the locking block 10.2 to retreat and unlock the evaporator core 0.1. At this time, the assembled evaporator assembly can be removed.
[0052] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
[0053] The above shows and describes the basic principles and main structural features of the present invention. The present invention is not limited to the above examples. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. An evaporator assembly core sponge assembly device, characterized in that: It comprises a bottom plate (1) and a position-limiting support mechanism arranged on the bottom plate (1) for position-limiting support of an evaporator core (0.1), the position-limiting support mechanism comprising a front support plate, a rear support plate (9), a left support plate (11), a right support plate (5) and a lower support plate (3), the front support plate being located on a side of the evaporator core (0.1) on which a high-pressure pipe (0.2) and a low-pressure pipe (0.3) are installed, the rear support plate (9) and the front support plate are located on opposite sides of the evaporator core (0.1); the left support plate (11) is located on a side of the evaporator core (0.1) on which an expansion valve (0.4) is installed, the right support plate (5) and the left support plate (11) are located on opposite sides of the evaporator core (0.1); the lower support plate (3) is located at the bottom of the evaporator core (0.1); A gap for installing the core sponge (0.5) is provided between the front support plate and the right support plate (5), and a first sponge pad (6) for placing the core sponge (0.5) is provided at the gap; a gap for installing the core sponge (0.5) is provided on the left support plate (11), and a locking mechanism (10) for locking the evaporator core (0.1) is provided on the rear support plate (9); The first sponge pad (6) and the lower support plate (3) are both provided with grooves for placing the core sponge (0.5); the width and depth of the grooves are designed according to the width and thickness of the core sponge (0.5) and can accommodate core sponges (0.5) of different models; the lower support plate (3) is provided with a core detection sensor (3.1) for detecting whether the evaporator core (0.1) is in place; The bottom plate (1) is provided with a sponge detection mechanism (12) for detecting whether the core sponge (0.5) is missing; the sponge detection mechanism (12) comprises a sponge detection sensor (12.1), a sensor bracket (12.2), a support rod (12.3) and a base (12.4); the base (12.4) is fixedly mounted on the bottom plate, the support rod (12.3) is mounted on the base (12.4), and the sponge detection sensor (12.1) is mounted on the support rod (12.3) via the sensor bracket (12.2); The bottom plate (1) is provided with an expansion valve position detection mechanism (13) for detecting whether the expansion valve (0.4) is correctly installed; the expansion valve position detection mechanism (13) comprises an expansion valve profiling block (13.1), a slider connecting plate (13.3), a slider (13.7), a slide rail (13.8), a handle (13.9), a handle mounting plate (13.10) and an expansion valve profiling block mounting plate (13.11); the expansion valve profiling block (13.1) is fixed to the expansion valve profiling block The expansion valve profiling block mounting plate (13.11) is fixed on the slider connecting plate (13.3), the slider connecting plate (13.3) is fixed on the slider (13.7), and the slider (13.7) is mounted on the slide rail (13.8); the handle (13.9) is mounted on the handle mounting plate (13.10); both ends of the slide rail (13.8) are provided with in-position sensors (13.5) and limit blocks (13.6); The rear support plate (9) is provided with a mold-changing mechanism (8); the first sponge pad (6) is provided with a second sponge pad (7) matched with the mold-changing mechanism (8); the second sponge pad (7) is provided with a groove for placing the core sponge (0.5); the mold-changing mechanism (8) comprises a mold-changing bottom plate (8.1), a connecting plate (8.2), a mold-changing cylinder (8.3) and a cylinder mounting plate (8.4); the mold-changing cylinder (8.3) is fixedly arranged on the rear support plate via the cylinder mounting plate (8.4); the mold-changing bottom plate (8.1) is connected to the mold-changing cylinder (8.3) via the connecting plate (8.2); the mold-changing cylinder (8.3) drives the mold-changing bottom plate (8.1) to extend out of the square hole of the rear support plate (9) to support the bottom of the evaporator core (0.1).