Integrated solar water heating and photovoltaic system multi-parameter field detection device

By introducing extendable rainproof devices and limit locking devices into the solar water heating and photovoltaic system testing device, the risk problem during emergency maintenance in rainy weather has been solved, and the stability and safety of the device have been improved.

CN224580468UActive Publication Date: 2026-07-31SHENZHEN TAIKE TEST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHENZHEN TAIKE TEST
Filing Date
2025-07-16
Publication Date
2026-07-31

AI Technical Summary

Technical Problem

Existing technologies pose a high risk when sudden emergency failures occur in rainy weather, requiring urgent repairs. Rainwater may seep into the device, causing short circuits and burning out the equipment, increasing repair costs and difficulty.

Method used

An integrated on-site testing device for solar water heating and photovoltaic systems was designed, equipped with an extendable rainproof device and a limit locking device. The rainproof device forms a shielding barrier when the cabinet door is opened to prevent rainwater from entering; the universal wheels are hidden through a telescopic mechanism to improve the stability of the device.

Benefits of technology

It effectively prevents rainwater from wetting the core components, reduces maintenance risks, and minimizes the spread of equipment failures and maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to the technical field of water heater energy consumption testing equipment, specifically an integrated on-site testing device for multi-parameter solar water heating and photovoltaic systems. It includes a cabinet, a canopy at the top of the cabinet, and a total solar radiation sensor located at the center of the canopy. The cabinet has doors on both sides. This integrated on-site testing device for multi-parameter solar water heating and photovoltaic systems utilizes an extendable rainproof device between the cabinet and the two doors, and a limiting locking device restricts the opening angle of the doors. When the doors are open, the rainproof device can be pulled out from the internal cavity of the cabinet, forming a 90-degree fan-shaped shield between the cabinet and the doors. This effectively prevents rainwater from wetting the core components inside the cabinet, thus preventing malfunctions caused by the opening of the doors during maintenance.
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Description

Technical Field

[0001] This utility model relates to the technical field of water heater energy consumption testing equipment, specifically an integrated on-site testing device for multiple parameters of solar water heating and photovoltaic systems. Background Technology

[0002] The integrated solar water heating and photovoltaic system multi-parameter field monitoring device is a portable device used to simultaneously monitor the performance of solar water heating systems and photovoltaic (PV) systems. Its core function is to simultaneously collect key parameters of both systems on-site, including solar irradiance, ambient temperature, water temperature / flow rate / energy consumption of the hot water system, and voltage / current / power of the photovoltaic modules. By integrating sensors, data acquisition modules, and analysis software, the device can achieve real-time monitoring, recording, and analysis of parameters. It can quickly assess the system's operating efficiency, diagnose faults, and optimize energy efficiency. It is widely used in the installation, commissioning, daily operation and maintenance, and performance evaluation of solar systems, providing data support for system optimization and energy-saving retrofitting.

[0003] A search revealed a Chinese patent (CN216116804U) disclosing a solar water heater energy consumption detection device. The device includes a mounting surface, a water heater fixedly connected to the surface, and a water tank fixedly connected to the surface away from the water heater. The water heater is connected to a ball valve, which in turn is connected to a solenoid valve. The solenoid valve is connected to one end of a first water supply pipe, the other end of which is connected to a meter. The meter is connected to one end of a second water supply pipe, the other end of which is connected to a water pump. The water pump is connected to the water tank. The meter includes a housing with a metering chamber inside. The metering chamber has two ends connected to the first and second water supply pipes, respectively. A support rod is fixedly attached to the top surface of the metering chamber, and a metering impeller is rotatably connected to the bottom end of the support rod. A groove is formed on the bottom surface of the metering chamber. This invention allows for cleaning of the metering impeller using a movable ring and a soft scraper. After prolonged use, the impeller does not need to be removed for cleaning, making it more convenient to use.

[0004] However, in actual use, it has been found that if an emergency failure occurs in rainy weather and is not repaired in time, it is very likely to cause further damage to the equipment, such as the expansion of short circuits, the burning of core modules, or even affecting the safe operation of the entire solar water heating and photovoltaic system. In this case, emergency repairs are necessary, but the cabinet door needs to be opened during the repair process, which significantly increases the risk. Rainwater will directly enter the device and adhere to core components such as circuit boards and terminals, which may not only cause short circuits and burn out the equipment, but may also lead to the expansion of the fault range, increasing the repair cost and difficulty. To address this, we propose an integrated multi-parameter on-site testing device for solar water heating and photovoltaic systems. Utility Model Content

[0005] The technical problem this application aims to solve is that if an emergency malfunction occurs during rainy weather when the above-mentioned patent is in use, and it is not repaired in time, it is very likely to cause further damage to the equipment, such as the expansion of short circuits, the burning of core modules, or even affecting the safe operation of the entire solar water heating and photovoltaic system. At this time, emergency repairs are necessary, but the cabinet door needs to be opened during the repair process, which will significantly increase the risk. Rainwater will directly enter the device and adhere to core components such as circuit boards and terminals, which will not only cause short circuits and burn out the equipment, but may also lead to the expansion of the fault range, increasing the repair cost and difficulty.

[0006] To address the aforementioned technical problems, this application provides an integrated on-site multi-parameter testing device for solar water heating and photovoltaic systems, comprising a cabinet, a canopy at the top of the cabinet, and a total solar radiation sensor located at the center of the top of the canopy. The cabinet has doors on both sides, with opposite ends of the doors rotatably connected to the cabinet. A fixing strip is provided on the upper part of opposite sides of each door. A horizontal plate is provided on the upper part of the inner side of the cabinet, forming a storage cavity between the horizontal plate and the cabinet. A rainproof device is provided between the cabinet and the two doors, and the rainproof device can be stored inside the storage cavity. When the rainproof device is pulled out of the storage cavity, it unfolds in a fan shape.

[0007] In some embodiments, the rainproof device includes a rainproof cloth, one straight edge of which is connected to the inside of a fixing strip. The intersection of the two sides of the rainproof cloth is installed between the cabinet and the horizontal plate via a fixing shaft. One end of the other straight edge of the rainproof cloth is connected to a slider. The rainproof device also includes a telescopic device for retracting the rainproof device into the receiving cavity.

[0008] In some embodiments, the telescopic device includes a slide groove formed at the top of the cabinet, and a spring is provided inside the slide groove, the spring being connected to the side of the slider near the slide groove.

[0009] In some embodiments, a limit locking device is provided between the cabinet body and the two cabinet doors. The limit locking device includes lock bodies disposed on both sides of the cabinet body. Each lock body has a tooth on an opposite side of its inner wall. A fixing cylinder is disposed in the middle of one of the teeth. A bolt rod is disposed inside the fixing cylinder. The bolt rod and the fixing cylinder are rotatably connected. The bolt rod passes through the upper wall of the lock body and extends to the outside of the lock body. The outer wall of the bolt rod is threadedly connected to the end of the bolt rod that passes through the lock body. A knob is disposed at the top of the bolt rod. The limit locking device also includes a door latch.

[0010] In some embodiments, the latch includes a movable member installed on the outer wall of the two cabinet doors. One end of the movable member with a hole is sleeved outside the fixed cylinder. Both sides of the movable member are provided with teeth II at the holes, and teeth II engage with teeth I.

[0011] In some embodiments, a mounting plate is provided at the bottom of the cabinet, and casters are installed at the four corners of the bottom of the mounting plate. The mounting plate and the cabinet are connected by a telescopic mechanism.

[0012] In some embodiments, the telescopic mechanism includes an upper mounting member disposed on the lower surface of the cabinet and a lower mounting member disposed on the upper surface of the mounting plate. The upper mounting member and the lower mounting member are disposed opposite to each other. The upper mounting member is internally rotatably connected to two upper brackets, and the lower mounting member is internally rotatably connected to two lower brackets. The opposite ends of the two upper brackets and the two lower brackets are rotatably connected by a connector. The telescopic mechanism also includes a drive component for driving the telescopic mechanism to extend and fold.

[0013] In some embodiments, the drive component includes mounting blocks disposed on the side of two upper brackets away from the upper mounting member, a threaded rod disposed between the two mounting blocks, one end of the threaded rod being rotatably connected to one of the mounting blocks, the other end of the threaded rod passing through the other mounting block, and a handle being provided at the end of the threaded rod located outside the mounting blocks.

[0014] In some embodiments, guide rods are provided on both sides of the upper surface of the mounting plate, and the top of the guide rods is connected to the lower surface of the cabinet.

[0015] This utility model has at least the following beneficial effects:

[0016] 1. In this utility model, an extendable rainproof device is installed between the cabinet body and the two cabinet doors, and the opening and closing angle of the cabinet doors is limited by a limiting locking device. When the cabinet door is opened, the rainproof device can be pulled out from the receiving cavity inside the cabinet body, forming a 90-degree fan-shaped shield between the cabinet body and the cabinet door. This can cover the open cabinet door and the parts of the cabinet body exposed to rain, effectively preventing rainwater from wetting the core components inside the cabinet body, and preventing malfunctions caused by the opening of the cabinet door during maintenance, which could lead to the core components inside the cabinet getting wet.

[0017] 2. In this utility model, by setting a telescopic mechanism between the mounting plate for installing casters and the cabinet, and by driving the telescopic mechanism to lift and lower it through a drive component, the cabinet and the mounting plate can be separated. When the cabinet does not need to be moved, the mounting plate and casters can be stored in the bottom of the cabinet, so that the cabinet is in direct contact with the ground, thereby improving the stability of the cabinet. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the cabinet body of this utility model;

[0020] Figure 3 This is a schematic diagram of the telescopic mechanism and drive component of this utility model;

[0021] Figure 4 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 5 This is a side sectional view of the cabinet structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the universal wheel structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the limiting and locking device of this utility model.

[0025] In the diagram: 1. Cabinet body; 11. Horizontal plate; 2. Ceiling; 3. Total solar radiation sensor; 4. Cabinet door; 41. Fixing strip; 5. Rainproof device; 51. Rain cover; 52. Fixed shaft; 53. Slider; 54. Telescopic device; 541. Slide rail; 542. Spring; 6. Limit locking device; 61. Lock body; 62. Tooth 1; 63. Fixed cylinder; 64. Bolt rod; 65. Knob; 66. Door latch; 661. Moving part; 662. Tooth 2; 7. Mounting plate; 71. Casters; 8. Telescopic mechanism; 81. Upper mounting part; 82. Lower mounting part; 83. Upper bracket; 84. Lower bracket; 85. Drive component; 851. Mounting block; 852. Threaded rod; 853. Handle; 9. Guide rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figure 1As shown in Figure 5, this utility model provides a technical solution: an integrated solar water heating and photovoltaic system multi-parameter field testing device, including a cabinet 1, a canopy 2 set at the top of the cabinet 1, and a total solar radiation sensor 3 set at the middle of the top of the canopy 2. Cabinet doors 4 are provided on both sides of the cabinet 1, and the opposite ends of the two cabinet doors 4 are rotatably connected to the cabinet 1. Fixing strips 41 are provided on the upper part of the opposite side of the two cabinet doors 4. A horizontal plate 11 is provided on the upper part of the inner side of the cabinet 1, and a receiving cavity for storage is formed between the horizontal plate 11 and the cabinet 1. A rainproof device 5 is provided between the cabinet 1 and the two cabinet doors 4. The rainproof device 5 can be stored inside the receiving cavity. When the rainproof device 5 is pulled out of the receiving cavity, it unfolds in a fan shape.

[0028] By setting a receiving cavity between the cabinet body 1 and the two cabinet doors 4, which can be stored inside the cabinet body 1, and as the cabinet doors 4 are opened, a rainproof device 5 connected between the cabinet body 1 and the cabinet doors 4 in a fan shape forms a shielding barrier to prevent rainwater from wetting the core components inside the cabinet body 1 when the cabinet doors 4 are opened.

[0029] Example 2: Based on Example 1, such as Figure 5 As shown, the rainproof device 5 includes a rainproof cloth 51. One straight edge of the rainproof cloth 51 is connected to the inside of the fixing strip 41. The intersection of the two sides of the rainproof cloth 51 is installed between the cabinet 1 and the horizontal plate 11 through the fixing shaft 52. One end of the other straight edge of the rainproof cloth 51 is connected to a slider 53. The rainproof device 5 also includes a telescopic device 54, which is used to retract the rainproof device 5 into the accommodating cavity.

[0030] The rainproof device 5 consists of a rainproof cloth 51, a fixed shaft 52, and a slider 53. One side of the rainproof cloth 51 is installed inside the fixed strip 41, and one end of the other side is fixed between the cabinet 1 and the horizontal plate 11 by the fixed shaft 52. The other end is provided with a slider 53, and the slider 53 is slidably connected to the telescopic device 54. The telescopic device 54 is used to retract the rainproof cloth 51 into the accommodating cavity when the cabinet door 4 is closed.

[0031] Example 3: Based on Example 1, such as Figure 5 As shown, the telescopic device 54 includes a slide 541 opened at the top of the cabinet 1. A spring 542 is provided inside the slide 541. The spring 542 is connected to the side of the slider 53 near the slide 541.

[0032] The telescopic device 54 consists of a slide groove 541 and a spring 542. The slide groove 541 is respectively opened on the top of the cabinet 1 on the side where the cabinet door 4 is open. The spring 542 is set inside the slide groove 541 and connected to the slider 53. When the cabinet door 4 is opened, the slider 53 slides from the inside to the outside of the slide groove 541. During the sliding process, the spring 542 extends. When the cabinet door 4 is closed, the spring 542 elastically retracts, pulling the slider 53 to the inside of the slide groove 541, thereby pulling the rain cover 51 into the cavity for storage.

[0033] Example 4: Based on Example 1, as follows Figure 7 As shown, a limit locking device 6 is provided between the cabinet body 1 and the two cabinet doors 4. The limit locking device 6 includes lock bodies 61 provided on both sides of the cabinet body 1. Each lock body 61 has a tooth 62 on one opposite side of its inner wall. A fixed cylinder 63 is provided in the middle of one of the teeth 62. A bolt rod 64 is provided inside the fixed cylinder 63. The bolt rod 64 and the fixed cylinder 63 are rotatably connected. The bolt rod 64 passes through the upper wall of the lock body 61 and extends to the outside of the lock body 61. The outer wall of the bolt rod 64 is threaded to the end that passes through the lock body 61. A knob 65 is provided at the top of the bolt rod 64. The limit locking device 6 also includes a latch 66. The latch 66 includes a movable part 661 installed on the outer wall of the two cabinet doors 4. One end of the movable part 661 with a hole is sleeved on the outside of the fixed cylinder 63. Teeth 662 are provided on both sides of the movable part 661 at the hole. Teeth 662 engage with teeth 62.

[0034] The limiting locking device 6 is used to fix the angle between the cabinet body 1 and the cabinet door 4 at 90 degrees when the cabinet door 4 is opened, allowing the rain cover 51 to fully extend. By setting the limiting locking devices 6 on both sides of the cabinet body 1, and setting the door latches 66 at the corresponding positions of the two cabinet doors 4 and the limiting locking devices 6, the door latches 66 are locked inside the limiting locking devices 6, so that the first tooth 62 and the second tooth 662 are engaged. By turning the knob 65, the bolt rod 64 threaded to the upper wall of the lock body 61 is rotated. During rotation, the bottom of the bolt rod 64 is always in close contact with the fixing cylinder 6. At the bottom of the inner wall of 3, and with the upper arm of the lock body 61 moving upward on the surface of the bolt rod 64, the upper and lower walls of the lock body 61 move away from each other, causing the second tooth 662 on the movable part 661 sleeved on the surface of the fixed cylinder 63 to separate from the first tooth 62. The cabinet door 4 can then be rotated along the hinged part between the cabinet door 4 and the cabinet body 1. When rotated to 90 degrees, the knob 65 is turned to move the upper wall of the lock body 61 downward on the surface of the bolt rod 64, causing the upper and lower walls of the lock body 61 to move closer together, so that the first tooth 62 and the second tooth 662 re-engage and lock, keeping the cabinet door 4 in a 90-degree open state.

[0035] Example 5: Based on Example 1, as follows Figure 3 and Figure 6As shown, a mounting plate 7 is provided at the bottom of the cabinet 1. Universal casters 71 are installed at the four corners of the bottom of the mounting plate 7. The mounting plate 7 and the cabinet 1 are connected by a telescopic mechanism 8. The telescopic mechanism 8 includes an upper mounting component 81 on the lower surface of the cabinet 1 and a lower mounting component 82 on the upper surface of the mounting plate 7. The upper mounting component 81 and the lower mounting component 82 are arranged opposite to each other. Two upper brackets 83 are rotatably connected inside the upper mounting component 81, and two lower brackets 84 are rotatably connected inside the lower mounting component 82. The two upper brackets 83 and the two lower brackets 84 are connected to each other. One end of each of the backs is rotatably connected by a connector. The telescopic mechanism 8 also includes a drive component 85 for driving the telescopic mechanism 8 to extend and fold. The drive component 85 includes a mounting block 851 disposed on the side of the two upper brackets 83 away from the upper mounting member 81. A threaded rod 852 is disposed between the two mounting blocks 851. One end of the threaded rod 852 is rotatably connected to one of the mounting blocks 851, and the other end of the threaded rod 852 passes through the other mounting block 851. A handle 853 is provided at the end of the threaded rod 852 located outside the mounting block 851.

[0036] The bottom of the cabinet 1 has a cavity for placing the mounting plate 7 and the casters 71. A telescopic mechanism 8, consisting of an upper mounting component 81, a lower mounting component 82, an upper bracket 83, and a lower bracket 84, is provided between the cavity and the mounting plate 7. This allows the mounting plate 7 and the cabinet 1 to be separated or brought closer together as needed. The telescopic mechanism 8 is extended by a drive component 85. When the cabinet 1 needs to be moved, the handle 853 is opened in the cabinet 1, and rotating the handle 853 drives the threaded rod 852 to rotate inside the mounting block 851. As they rotate, they move closer together, causing the upper bracket 83 and lower bracket 84 to extend upwards, lifting the cabinet 1 from the top of the mounting plate 7 and separating the cabinet 1 from the mounting plate 7 until the caster wheel 71 is fully exposed outside the cabinet 1. After moving the position of the cabinet 1, to ensure the stability of the cabinet 1, the handle 853 can be rotated in the opposite direction, causing the mounting blocks 851 to move away from each other on the surface of the threaded rod 852, so that the upper bracket 83 and lower bracket 84 overlap, and the cabinet 1 and mounting plate 7 are close together until the caster wheel 71 is completely hidden inside the cabinet 1.

[0037] Example 6: Based on Example 1, as follows Figure 6 As shown, guide rods 9 are provided on both sides of the upper surface of the mounting plate 7, and the top of the guide rods 9 are connected to the lower surface of the cabinet 1.

[0038] The guide rod 9 is used to assist the extension trajectory of the telescopic mechanism 8 during extension, so that the cabinet 1 and the mounting plate 7 remain stable during the extension process.

[0039] Based on the above embodiments, the following is the complete working principle of the above embodiments: In use, first determine the desired placement position of cabinet 1. Then, insert your hand into the opening at handle 853 on cabinet 1 and rotate handle 853. This drives the threaded rod 852 to rotate inside mounting block 851. The two mounting blocks 851 move closer together as they rotate, causing the upper support 83 and lower support 84 to extend upwards, lifting cabinet 1 from the top of mounting plate 7, thus aligning cabinet 1 and mounting plate 7. Separate the components until the casters 71 are fully exposed outside the cabinet 1. Then move the cabinet 1 to the designated position. After moving the cabinet 1, to ensure its stability, rotate the handle 853 in the opposite direction to move the mounting blocks 851 away from each other on the surface of the threaded rod 852, causing the upper bracket 83 and lower bracket 84 to overlap, with the cabinet 1 and mounting plate 7 close together, until the casters 71 are completely hidden inside the cabinet 1. Then, the cabinet 1 can be inspected. Cabinet doors 4 are provided on opposite sides of the equipment. Pull the cabinet door 4 outwards. At this time, the upper and lower walls of the lock body 61 are in the open state and do not engage with the teeth 662. The movable part 661 can rotate on the fixed cylinder 63. At the same time, the slider 53 slides from the inside to the outside of the slide groove 541. During the sliding process, the spring 542 extends until the slider 53 is at the outermost part of the slide groove 541. At this time, continue to pull the cabinet door 4 until the cabinet door 4 and the cabinet body 1 are at a 90-degree angle. Then, turn the knob 65 to move the upper wall of the lock body 61 down on the surface of the bolt rod 64, so that the lock body 61... When the upper and lower walls of cabinet 1 are brought close together, tooth 62 and tooth 662 re-engage and lock together, keeping cabinet door 4 open at 90 degrees for maintenance. When cabinet door 4 is closed, spring 542 retracts elastically, pulling slider 53 to the inside of slide groove 541, thereby pulling rain cover 51 into the accommodating cavity for storage. This device effectively prevents rainwater from wetting the core components inside cabinet 1, and prevents malfunctions caused by the opening of cabinet door 4 during maintenance.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An integrated on-site multi-parameter monitoring device for solar water heating and photovoltaic systems, comprising a cabinet (1), a canopy (2) mounted on the top of the cabinet (1), and a total solar radiation sensor (3) mounted in the middle of the top of the canopy (2), characterized in that: The cabinet (1) is provided with cabinet doors (4) on both sides. The opposite ends of the two cabinet doors (4) are rotatably connected to the cabinet (1). The upper part of the opposite side of the two cabinet doors (4) is provided with fixing strips (41). The upper part of the inner side of the cabinet (1) is provided with a horizontal plate (11). The horizontal plate (11) and the cabinet (1) form a storage cavity. A rainproof device (5) is provided between the cabinet (1) and the two cabinet doors (4). The rainproof device (5) can be stored inside the storage cavity. When the rainproof device (5) is pulled out of the storage cavity, it unfolds in a fan shape.

2. The integrated solar water heating and photovoltaic system multi-parameter on-site testing device according to claim 1, characterized in that: The rainproof device (5) includes a rainproof cloth (51), one straight edge of which is connected to the inside of a fixing strip (41). The intersection of the two sides of the rainproof cloth (51) is installed between the cabinet (1) and the horizontal plate (11) via a fixing shaft (52). One end of the other straight edge of the rainproof cloth (51) is connected to a slider (53). The rainproof device (5) also includes a telescopic device (54), which is used to retract the rainproof device (5) into the accommodating cavity.

3. The integrated solar water heating and photovoltaic system multi-parameter on-site testing device according to claim 2, characterized in that: The telescopic device (54) includes a slide (541) opened at the top of the cabinet (1), and a spring (542) is provided inside the slide (541). The spring (542) is connected to the side of the slider (53) near the slide (541).

4. The integrated solar water heating and photovoltaic system multi-parameter field testing device according to claim 1, characterized in that: A limit locking device (6) is provided between the cabinet (1) and the two cabinet doors (4). The limit locking device (6) includes a lock body (61) on both sides of the cabinet (1). The inner wall of the lock body (61) is provided with teeth (62) on opposite sides. A fixing cylinder (63) is provided in the middle of one of the teeth (62). A bolt rod (64) is provided inside the fixing cylinder (63). The bolt rod (64) and the fixing cylinder (63) are rotatably connected. The bolt rod (64) penetrates the upper wall of the lock body (61) and extends to the outside of the lock body (61). The outer wall of the bolt rod (64) is threaded to the end of the bolt rod (64) that penetrates the lock body (61). A knob (65) is provided at the top of the bolt rod (64). The limit locking device (6) also includes a door latch (66).

5. The integrated solar water heating and photovoltaic system multi-parameter on-site testing device according to claim 4, characterized in that: The latch (66) includes a movable part (661) installed on the outer wall of the two cabinet doors (4). The movable part (661) has a hole at one end and is sleeved on the outside of the fixed cylinder (63). The movable part (661) has teeth two (662) on both sides at the hole, and the teeth two (662) mesh with teeth one (62).

6. The integrated solar water heating and photovoltaic system multi-parameter on-site testing device according to claim 1, characterized in that: The cabinet (1) is provided with a mounting plate (7) at the bottom. The mounting plate (7) is equipped with casters (71) at the four corners of the bottom end. The mounting plate (7) and the cabinet (1) are connected by a telescopic mechanism (8).

7. The integrated solar water heating and photovoltaic system multi-parameter field testing device according to claim 6, characterized in that: The telescopic mechanism (8) includes an upper mounting part (81) disposed on the lower surface of the cabinet (1) and a lower mounting part (82) disposed on the upper surface of the mounting plate (7). The upper mounting part (81) and the lower mounting part (82) are disposed opposite to each other. The upper mounting part (81) is internally rotatably connected to two upper brackets (83), and the lower mounting part (82) is internally rotatably connected to two lower brackets (84). The opposite ends of the two upper brackets (83) and the two lower brackets (84) are rotatably connected by a connector. The telescopic mechanism (8) also includes a driving component (85) for driving the telescopic mechanism (8) to extend and fold.

8. The integrated solar water heating and photovoltaic system multi-parameter field testing device according to claim 7, characterized in that: The drive component (85) includes a mounting block (851) disposed on the side of the two upper brackets (83) away from the upper mounting member (81), a threaded rod (852) is disposed between the two mounting blocks (851), one end of the threaded rod (852) is rotatably connected to one of the mounting blocks (851), the other end of the threaded rod (852) passes through the other mounting block (851), and a handle (853) is provided at the end of the threaded rod (852) located outside the mounting block (851).

9. The integrated solar water heating and photovoltaic system multi-parameter field testing device according to claim 6, characterized in that: Guide rods (9) are provided on both sides of the upper surface of the mounting plate (7), and the top of the guide rods (9) are connected to the lower surface of the cabinet (1).