Refrigerating device for automatic water quality sampler and automatic water quality sampler

Abstract

The utility model provides a refrigerating device for an automatic water quality sampler and the automatic water quality sampler, and relates to the technical field of water quality monitoring. The refrigeration device for the automatic water quality sampler comprises a door body; the box body is provided with a containing cavity for installing the inner container, and the door body is used for blocking the containing cavity; the refrigerating system is arranged in the containing cavity and used for refrigerating the interior of the inner container; the heating unit is arranged in the accommodating cavity; the auxiliary part comprises a detection unit, and the detection unit is used for detecting the environment temperature and humidity of the box body; the control system can receive information of the detection unit and control starting and stopping of the refrigerating system and starting and stopping of the heating unit. The automatic water quality sampler is matched with a refrigerating device used for the automatic water quality sampler, can adapt to different temperature environments, and is better in adaptability, stable in refrigeration and capable of avoiding sample deterioration compared with a general sampler using a household refrigerator for refrigeration.

Description

Technical Field

[0001] This application relates to the field of water quality monitoring technology, and more specifically, to a refrigeration device for an automatic water quality sampler and an automatic water quality sampler. Background Technology

[0002] In the field of water quality monitoring, automatic samplers (AS / RS) are widely used as an important monitoring tool in water quality monitoring of rivers, lakes, reservoirs, industrial parks, sewage discharge units, and wastewater treatment plants. These AS / RS need to maintain the freshness of water samples to ensure the accuracy of monitoring results.

[0003] Currently, most automatic water samplers on the market use household refrigerators as their cooling system. While household refrigerators are widely used in daily life, they were not originally designed for the specific needs of water quality monitoring. Household refrigerators have a narrow temperature control range, making them ill-suited for extreme low or high temperature environments. Under extreme low temperatures, the refrigerator's compressor may malfunction due to solidified refrigerant oil, resulting in reduced cooling efficiency; conversely, under extreme high temperatures, the refrigerator's heat dissipation system may be damaged due to excessive load, similarly affecting cooling performance. Furthermore, household refrigerators typically lack the ability to operate stably for extended periods. After several days or weeks of continuous operation, their cooling efficiency may gradually decline, and equipment malfunctions may even occur. These problems not only increase operating costs but may also interfere with the monitoring environment, affecting the accuracy of the monitoring results. Utility Model Content

[0004] The purpose of this application is to provide a cooling device for an automatic water sampler that can improve the problem of instability of the cooling system of existing automatic water samplers under extreme conditions.

[0005] Another object of this application is to provide an automatic water sampler that includes the above-described refrigeration device for an automatic water sampler and has all the characteristics of the refrigeration device for an automatic water sampler.

[0006] The embodiments of this application are implemented as follows:

[0007] An embodiment of this application provides a cooling device for an automatic water quality sampler, comprising:

[0008] Door body;

[0009] The box body has a cavity for installing an inner liner, and the door is used to seal the cavity;

[0010] A refrigeration system, disposed in the receiving cavity, is used to refrigerate the interior of the inner liner;

[0011] A heating unit is disposed in the receiving cavity;

[0012] Auxiliary components, including a detection unit for detecting the ambient temperature and humidity of the enclosure; and

[0013] A control system is located in the external space of the receiving cavity or the housing. The control system is capable of receiving information from the detection unit and controlling the start and stop of the refrigeration system and the start and stop of the heating unit.

[0014] The control system can preset the working temperature of the inner liner. When the detection unit detects that the ambient temperature is lower than the working temperature, the control system controls the refrigeration system to stop. When the detection unit detects that the ambient temperature is higher than the working temperature, the control system controls the refrigeration system to start.

[0015] When the detection unit detects that the ambient humidity exceeds the set value, the control system controls the heating unit to start to avoid condensation between the door and the cabinet. The control system can also control the heating unit to defrost the refrigeration system at a preset cycle.

[0016] In addition, the cooling device for an automatic water sampler provided according to the embodiments of this application may also have the following additional technical features:

[0017] In an optional embodiment of this application, the outer side of the inner liner is provided with a left side plate, a right side plate, a top plate and a bottom plate, or the inner liner is formed by the left side plate, the right side plate, the top plate and the bottom plate;

[0018] The left and right side plates are used to assemble components of the automatic water sampler. The housing has a rear side plate. The refrigeration system and the heating unit are installed on the top plate, the bottom plate, the rear side plate, and the auxiliary components.

[0019] In an optional embodiment of this application, the base plate includes a first tabletop and a second tabletop, which are connected by a vertical plate. The first tabletop is close to the rear side plate of the housing. The space between the first tabletop, the vertical plate, and the housing is used to install the compressor, condenser, cooling fan, capillary tube, and dryer filter of the refrigeration system. The refrigeration system also includes an evaporator, which is located on the rear side plate of the housing. One end of the compressor is connected to the evaporator, and the other end is connected to the condenser. The condenser is connected to the dryer filter, and the dryer filter is connected to the evaporator through the capillary tube, forming a refrigeration circuit.

[0020] In an optional embodiment of this application, the refrigeration device for the automatic water sampler further includes an evaporation tank, the first platform has a drainage trough, the drainage trough has a drain outlet, the drain outlet is connected to the evaporation tank, and the evaporation tank is disposed on the compressor;

[0021] The second platform is provided with a water leakage groove, and the auxiliary component includes a water leakage detector, which is installed in the water leakage groove and can feed back water leakage information to the control system.

[0022] In an optional embodiment of this application, the connectors used between the compressor, the condenser, the cooling fan, the capillary tube, the dryer filter, and the evaporator are all protected by spraying anti-corrosion paint.

[0023] In an optional embodiment of this application, the connector includes a refrigeration pipe, wherein the thickness of the protective layer at the welded position of the refrigeration pipe is ten times the thickness of the protective layer at the non-welded position.

[0024] In an optional embodiment of this application, the heating unit includes a temperature-compensated heating wire, which is disposed on the side of the left side panel near the door, the side of the right side panel near the door, the side of the top panel near the door, and the rear side panel. The temperature-compensated heating wire is controlled to start and stop by the control system.

[0025] In an optional embodiment of this application, the door body is provided with a door lock limiting member and a limit switch, the top plate is provided with a door lock and a limit detection member, the door lock cooperates with the door lock limiting member, the limit switch cooperates with the limit detection member, and when the limit detection member triggers the limit switch, the door lock and the door lock limiting member are locked.

[0026] In an optional embodiment of this application, the auxiliary component further includes a duct fan, the refrigeration system includes an evaporator, and the duct fan is disposed on the rear side panel of the housing and located above the evaporator.

[0027] An embodiment of this application provides an automatic water sampler, including an integrated box and a refrigeration device for an automatic water sampler as described in any of the above claims. The control system of the refrigeration device for the automatic water sampler is a control board, which is disposed inside the integrated box.

[0028] The beneficial effects of this application are:

[0029] The automatic water sampler of this application, in conjunction with a refrigeration device for automatic water samplers, can adapt to different temperature environments. Compared with samplers that generally use household refrigerators for refrigeration, it has better adaptability, can stably cool, avoid sample deterioration, has stronger corrosion resistance, and meets the requirements of harsh environment applications. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 An isometric view of an automatic water sampler;

[0032] Figure 2 Left view of the cooling unit used in an automatic water sampler;

[0033] Figure 3 for Figure 1 A diagram showing the back shell removed;

[0034] Figure 4 for Figure 1 A schematic diagram of the cooling device used in an automatic water sampler after the door is opened;

[0035] Figure 5 for Figure 4 A magnified view of part A;

[0036] Figure 6 for Figure 4 A magnified view of part B;

[0037] Figure 7 Front view of the cooling unit used in an automatic water sampler (surface textures hidden);

[0038] Figure 8 for Figure 7 A cross-sectional view along the CC direction;

[0039] Figure 9 for Figure 7 A cross-sectional view along the DD direction;

[0040] Figure 10 Rear view of the cooling unit used in the automatic water sampler (partial rear casing is hidden);

[0041] Figure 11 for Figure 10 A magnified view of part E.

[0042] Icons: 100 - Cooling unit for automatic water sampler; 10 - Door; 11 - Door lock limiter; 12 - Limit switch; 13 - Door handle; 14 - Sealing strip; 20 - Cabinet; 21 - Inner liner; 211 - Left side panel; 212 - Right side panel; 213 - Top panel; 214 - Bottom panel; 2141 - First platform; 21411 - Drainage trough; 21412 - Drain outlet; 2142 - Second platform; 21421 - Leakage trough; 2143 - Vertical panel; 217 - LED light; 218 - Walkway 219 - Cable tray; 220 - Cable hole; 221 - Pipe hole; 222 - Door lock mounting bracket; 22 - Rear panel; 23 - Outer shell; 24 - Insulation layer; 31 - Compressor; 32 - Condenser; 33 - Cooling fan; 34 - Capillary tube; 35 - Dryer filter; 36 - Evaporator; 52 - Door lock; 53 - Stroke detection element; 54 - Duct fan; 55 - Evaporation water tank; 56 - Leakage detector; 57 - Temperature sensor; 60 - Control system; 70 - Casters; 200 - Integrated box; 210 - Display unit. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is conventionally placed during use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] Example

[0049] Please refer to Figures 1 to 7 This application provides a cooling device 100 for an automatic water quality sampler, comprising:

[0050] Door body 10;

[0051] The box body 20 has a cavity for installing the inner liner 21, and the door 10 is used to seal the cavity.

[0052] A refrigeration system is installed in the receiving cavity to cool the interior of the inner liner 21.

[0053] The heating unit is located in the receiving cavity. It mainly generates heat when powered on, thereby raising the temperature. It is mainly used to solve problems such as defrosting, anti-condensation, and antifreeze, so as to ensure the normal operation of the refrigeration device and extend its service life.

[0054] Auxiliary components include a detection unit (an electronic thermometer and hygrometer is used in this embodiment) for detecting the ambient temperature and humidity of the enclosure 20; and

[0055] The control system 60 is located in the external space of the receiving cavity or the box 20 (in this embodiment, the control system 60 is a control board, which is located in the integrated box 200 mentioned below). The control system 60 can receive information from the detection unit and control the start and stop of the refrigeration system and the start and stop of the heating unit.

[0056] The control system 60 can preset the working temperature of the inner liner 21. When the detection unit detects that the ambient temperature is lower than the working temperature, the control system 60 controls the refrigeration system to stop. When the detection unit detects that the ambient temperature is higher than the working temperature, the control system 60 controls the refrigeration system to start.

[0057] When the detection unit detects that the ambient humidity exceeds the set value, the control system 60 controls the heating unit to start to avoid condensation between the door 10 and the cabinet 20. The control system 60 can also control the heating unit to defrost the refrigeration system at a preset cycle. When the detection unit detects that the ambient temperature is lower than the set value, the control system 60 controls the refrigeration system to stop working. If the temperature cannot reach the preset temperature within a certain period of time, the control system 60 controls the heating unit to start to avoid the low ambient temperature affecting the refrigeration effect.

[0058] Understandably, through the detection and feedback of the detection unit, the control system 60 can control the heating unit to defrost, heat, and prevent condensation of the cooling system, ensuring the stability of the cooling system during long-term operation and when the humidity is high. It can also automatically start the cooling system when the temperature is too high and shut down the cooling system when the temperature is too low, thus ensuring the stability of the sample.

[0059] Specifically, the outer side of the inner liner 21 is provided with a left side plate 211, a right side plate 212, a top plate 213 and a bottom plate 214, or the inner liner 21 is surrounded by the left side plate 211, the right side plate 212, the top plate 213 and the bottom plate 214.

[0060] It should be noted that in this embodiment, the left side panel 211, right side panel 212, top panel 213, bottom panel 214, and rear panel 22 of the housing 20 form an inner liner 21 for placing samples. The outer shell 23 of the housing 20 is made of metal, such as steel or aluminum, to provide good insulation and durability. An insulation layer 24 exists between the outer shell 23 and the inner liner 21. The left side panel 211, right side panel 212, top panel 213, and bottom panel 214 can themselves serve as cavities for housing the refrigeration system, heating unit, auxiliary components, etc., and are not limited to areas outside the inner liner 21 as the aforementioned cavities. The inner liner 21 uses food-grade plastic or stainless steel to ensure a safe internal environment. The design of the housing 20 not only protects and supports the internal components but also provides insulation. The insulation layer 24 primarily maintains a stable internal temperature for the refrigeration system and prevents the influence of outdoor temperatures on the interior; it typically uses materials with good insulation properties to enhance the insulation effect.

[0061] Understandably, the left side plate 211 and right side plate 212 are used to assemble the components of the automatic water sampler (the components are existing devices and will not be described in detail here), and the cooling system and heating unit are installed on the top plate 213, bottom plate 214, rear side plate 22 and auxiliary components.

[0062] In detail, the door 10 is equipped with a door lock limiter 11 and a limit switch 12, while the top plate 213 is equipped with a door lock 52 and a travel detection element 53. The door lock 52 cooperates with the door lock limiter 11 to form a switch that cooperates with the travel detection element 53. When the travel detection element 53 triggers the limit switch 12, the door lock 52 and the door lock limiter 11 are locked. When the control system 60 detects that the door is closed, the door 10 is locked to ensure that the water sample or components inside are not disturbed. The control system 60 can also open the door lock 52 to process and maintain the water sample or components inside the tank 20. The door 10 and the tank 20 are generally connected by hinges, allowing the door to open and close freely within a specific angle. It also has a self-rebound design; when the door is closed to a certain angle, it automatically rebounds to make the door fit more securely with the tank 20. Looking at the door 10 from the left, including the door handle 13, the black handle design makes opening the door more convenient. Looking at the door 10 from the front, the inner side includes a sealing strip 14. The sealing strip 14 is embedded in the door 10. When the door 10 is closed, the sealing strip 14 fits tightly against the door frame of the cabinet 20, forming an effective sealing barrier, which effectively prevents the cold air inside from leaking out and isolates the heat from the outside from entering the cabinet 20, further maintaining the low temperature environment inside the cabinet 20.

[0063] The inner side of the left side panel 211 has a wiring channel for concealing wiring. The inner sides of the left and right side panels have fixing holes for installing sheet metal parts to fix the components of the automatic water sampler. The inner side of the top panel 213 has an LED light 217, a wiring channel 218, a wire passage hole 219, a pipe passage hole 220, and a door lock mounting bracket 221. The LED light 217 is fixed to the top panel 213 with screws. The wiring channel 218 of the top panel is connected to the wiring channel of the left side panel to conceal wiring. The pipe passage hole 220 has a T-shaped sleeve for pipe insertion to prevent the pipe from being scratched. The upper end of the pipe passage hole 220 is fixed with sealant for heat preservation. The door lock mounting bracket 221 is connected to the top panel 213. The door lock 52 and the travel detection component 53 are fixed on the door lock mounting bracket 221. When the door 10 is closed, a closing signal is detected, and the door lock 52 locks. The wiring channel 218, the wire passage hole 219, and the pipe passage hole 220 are all manifestations of the aforementioned receiving cavity.

[0064] In this embodiment, the base plate 214 adopts a stepped design. The base plate 214 includes a first platform 2141 and a second platform 2142. The first platform 2141 and the second platform 2142 are connected by a vertical plate 2143. The first platform 2141 is close to the rear side plate 22 of the box body 20. The first platform 2141, the vertical plate 2143, and the box body 20 ( Figure 6 and 7(The partial structure at the back of the enclosure is concealed to allow observation of the interior.) The space between these components houses the compressor 31, condenser 32, cooling fan 33, capillary tube 34, and dryer filter 35 of the refrigeration system. The condenser 32 is mounted on a bracket, which is fixed to the bottom of the enclosure 20. The refrigeration system also includes an evaporator 36, located on the rear panel 22 of the enclosure 20. One end of the compressor 31 is connected to the evaporator 36, and the other end is connected to the condenser 32. The condenser 32 is connected to the dryer filter 35, which is connected to the evaporator 36 via the capillary tube 34, forming a refrigeration circuit. The refrigeration system works by refrigerant vapor flowing from the evaporator 36, being drawn in by the compressor 31 and compressed into a high-temperature, high-pressure gas. This high-temperature, high-pressure refrigerant vapor is cooled into a liquid state by the condenser 32, releasing heat to the external environment. The cooling fan 33 is used to dissipate heat from the condenser 32. Powered by the fan, the fan continuously runs to cool the condenser 32, forming a component with the condenser 32.

[0065] The auxiliary components also include a duct fan 54, which is located on the rear side panel 22 of the housing 20 and above the evaporator 36, to promote airflow inside the housing 20.

[0066] The refrigeration unit 100 for the automatic water sampler also includes an evaporation tank 55. The first platform 2141 has a drain trough 21411, into which condensate from the evaporator 36 falls. The drain trough 21411 has a drain outlet 21412 connected to the evaporation tank 55, which is mounted on the compressor 31. This allows the heat generated by the compressor 31 to remove water from the evaporation tank 55, forming a drainage system that effectively keeps the inner tank 21 dry.

[0067] The second surface 2142 is equipped with a water leakage groove 21421. Auxiliary components include a water leakage detector 56, which is installed within the water leakage groove 21421 and can report leakage information to the control system 60. When water is detected, it indicates the presence of condensate or a leak. The control system 60 can then use this information to stop the cooling process. After the leak is resolved, the cooling function will automatically restart, thus extending the system's lifespan.

[0068] The connecting parts used between the compressor 31, condenser 32, cooling fan 33, capillary tube 34, dryer filter 35 and evaporator 36 are all protected by spraying anti-corrosion paint.

[0069] The connectors include refrigeration pipes, and the protective layer thickness at the welded locations of the refrigeration pipes is ten times that at the non-welded locations. Specifically, the capillary tube 34 and the dryer filter 35 are made of corrosion-resistant and moisture-proof materials. Special treatments are applied to easily corroded components such as refrigeration pipes, including increased coating protection and passivation treatment, thereby improving corrosion resistance. This ensures that the equipment can maintain good performance even in harsh environments such as humidity and acids / alkalis during long-term use, reducing maintenance and replacement costs caused by corrosion.

[0070] The heating unit includes a temperature-compensated heating wire, which is located on the side of the left side panel 211 near the door 10, the side of the right side panel 212 near the door 10, the side of the top panel 213 near the door 10, and the rear side panel 22. The temperature-compensated heating wire is controlled to start and stop by the control system 60.

[0071] Casters 70 are also provided at the bottom of the housing 20, allowing the housing 20 to be easily moved on the ground. In different usage environments, such as uneven ground, the support height of the housing 20 can be adjusted by adjusting the support height of the casters 70 to maintain the balance of the housing 20. The casters 70 are made of high-end silent and corrosion-resistant materials and designed to reduce noise generated during movement and improve the user experience. The casters 70 support the bottom of the housing 20 and create a gap between it and the ground, allowing water or corrosive gases on the ground to be discharged and evaporate through the bottom perimeter, making the equipment less susceptible to damage or corrosion. The casters 70 in this embodiment are made of Foma wheels, which have strong load-bearing capacity, are easy and efficient to install, and are height-adjustable, can be fixed for heavy loads, and can be rolled around.

[0072] This application provides an automatic water sampler, including an integrated box 200 and a refrigeration device 100 for the automatic water sampler. The control system 60 for the refrigeration device 100 is a control board and is located inside the integrated box 200. The integrated box 200 is located above the box body 20 and provides power to the refrigeration device and starts and stops the refrigeration device according to the set temperature range. The integrated box 200 may be equipped with a display unit 210, which mainly displays temperature, humidity information, and alarm reminders. Through the display unit 210, the temperature of the refrigeration system can be set, the temperature of the refrigeration device can be calibrated, the access control system can be opened, and the heating time cycle can be displayed. The display unit can be controlled by a separate control board or by the control system 60.

[0073] The temperature sensor 57 of the auxiliary component is installed in the lower right corner of the rear panel 22 of the cabinet 20 and connected to the control system 60 to detect the ambient temperature of the inner liner 21 in real time. The control system 60, together with the temperature sensor 57, drainage tank 21411, evaporation water tank 55, leakage detection, door lock 52, and stroke detection component 53, can realize functions such as automatic drainage, leakage alarm, and access control, making the refrigeration device more intelligent and safe.

[0074] When the refrigeration unit 100 of the automatic water sampler is working, the control system 60 monitors the ambient humidity in real time through a connected electronic thermometer and hygrometer. When the ambient humidity exceeds the set value, the temperature compensation heating wire is automatically activated to heat the refrigeration system, effectively preventing condensation between the cabinet 20 and the front door. The heating compensation function can also be automatically activated according to a set cycle and duration. On the other hand, during long-term operation, frost easily condenses on the surface of the evaporator 36, affecting the cooling effect. The temperature compensation heating wire can be used as part of the automatic defrosting process, automatically energizing and heating according to the time set by the control system 60 to melt the frost on the evaporator 36 and drain it out of the refrigerator through the drainage system, effectively preventing frost accumulation from affecting the cooling effect. Timely automatic defrosting keeps the evaporator 36 clean and efficient, thereby improving the efficiency of the refrigeration system and reducing energy consumption. The refrigeration unit can automatically stop the compressor 31 when the temperature of the cabinet 4 is detected to be lower than the set temperature of -1.5℃, and automatically start the compressor 31 when the temperature is higher than the set temperature of 1.5℃. Automatic warning is activated when the calibration temperature exceeds 1°C or when a leak is detected in the refrigeration unit. Automatic defrosting automatically activates the heating element according to a set cycle and duration, or automatically starts the defrosting function when the ambient humidity reaches a set value. Automatic protection functions include automatically stopping the compressor 31 during automatic defrosting to prevent malfunctions caused by prolonged operation; stopping refrigeration upon detecting a leak and automatically restarting the refrigeration function after the leak is resolved; and automatically protecting the compressor 31's refrigeration function when the door is open.

[0075] The automatic water sampler of this application, in conjunction with the cooling device 100 for automatic water samplers, can adapt to different temperature environments. Compared with samplers that generally use household refrigerators for cooling, it has better adaptability, can stably cool, and prevents sample deterioration. Furthermore, it is corrosion-resistant, which is beneficial for long-term use.

[0076] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A refrigeration device for an automatic water sampler, characterized in that, include: Door body; The box body has a cavity for installing an inner liner, and the door is used to seal the cavity; A refrigeration system, disposed in the receiving cavity, is used to refrigerate the interior of the inner liner; A heating unit is disposed in the receiving cavity; An auxiliary component, the auxiliary component including a detection unit, the detection unit being used to detect the ambient temperature and humidity of the enclosure; as well as A control system is located in the external space of the receiving cavity or the housing. The control system is capable of receiving information from the detection unit and controlling the start and stop of the refrigeration system and the start and stop of the heating unit. The control system can preset the working temperature of the inner liner. When the detection unit detects that the ambient temperature is lower than the working temperature, the control system controls the refrigeration system to stop. When the detection unit detects that the ambient temperature is higher than the working temperature, the control system controls the refrigeration system to start. When the detection unit detects that the ambient humidity exceeds the set value, the control system controls the heating unit to start to avoid condensation between the door and the cabinet. The control system can also control the heating unit to defrost the refrigeration system at a preset cycle.

2. The refrigeration device for an automatic water quality sampler according to claim 1, characterized in that, The inner liner is provided with a left side plate, a right side plate, a top plate and a bottom plate on the outside, or the inner liner is formed by the left side plate, the right side plate, the top plate and the bottom plate; The left and right side plates are used to assemble components of the automatic water sampler. The housing has a rear side plate. The refrigeration system and the heating unit are installed on the top plate, the bottom plate, the rear side plate, and the auxiliary components.

3. The refrigeration device for an automatic water quality sampler according to claim 2, characterized in that, The base plate includes a first tabletop and a second tabletop, which are connected by a vertical plate. The first tabletop is located near the rear side panel of the housing. The space between the first tabletop, the vertical plate, and the housing is used to install the compressor, condenser, cooling fan, capillary tube, and dryer filter of the refrigeration system. The refrigeration system also includes an evaporator, which is located on the rear side panel of the housing. One end of the compressor is connected to the evaporator, and the other end is connected to the condenser. The condenser is connected to the dryer filter, which is connected to the evaporator through the capillary tube, forming a refrigeration circuit.

4. The refrigeration device for an automatic water sampler according to claim 3, characterized in that, The refrigeration device for the automatic water sampler further includes an evaporation tank, the first platform has a drainage trough, the drainage trough has a drain outlet, the drain outlet is connected to the evaporation tank, and the evaporation tank is mounted on the compressor; The second platform is provided with a water leakage groove, and the auxiliary component includes a water leakage detector, which is installed in the water leakage groove and can feed back water leakage information to the control system.

5. The refrigeration device for an automatic water sampler according to claim 3, characterized in that, The connectors used between the compressor, the condenser, the cooling fan, the capillary tube, the dryer filter, and the evaporator are all protected by being coated with anti-corrosion paint.

6. The refrigeration device for an automatic water sampler according to claim 5, characterized in that, The connector includes a refrigeration pipe, and the thickness of the protective layer at the welded position of the refrigeration pipe is ten times the thickness of the protective layer at the non-welded position.

7. The refrigeration device for an automatic water quality sampler according to claim 2, characterized in that, The heating unit includes a temperature-compensated heating wire, which is disposed on the side of the left side panel near the door, the side of the right side panel near the door, the side of the top panel near the door, and the rear side panel. The temperature-compensated heating wire is controlled to start and stop by the control system.

8. The refrigeration device for an automatic water sampler according to claim 2, characterized in that, The door body is equipped with a door lock limiter and a limit switch, and the top plate is equipped with a door lock and a limit detection device. The door lock cooperates with the door lock limiter, and the limit switch cooperates with the limit detection device. When the limit detection device triggers the limit switch, the door lock and the door lock limiter are locked.

9. The refrigeration device for an automatic water sampler according to claim 2, characterized in that, The auxiliary components also include a duct fan, and the refrigeration system includes an evaporator. The duct fan is located on the rear side panel of the housing and above the evaporator.

10. An automatic water quality sampler, characterized in that, The device includes an integrated box and a refrigeration device for an automatic water sampler as described in any one of claims 1-9, wherein the control system of the refrigeration device for the automatic water sampler is a control board, and the control board is disposed inside the integrated box.

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