A high and low temperature test chamber using low temperature coils for dehumidification
By employing low-temperature coils and a dehumidification system in the high and low temperature test chamber, the problem of poor humidity control was solved, achieving efficient dehumidification and stability of the test environment, thus ensuring the accuracy of the test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU JIAYI ELECTRONIC TECH CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-06-09
AI Technical Summary
Existing high and low temperature test chambers lack effective dehumidification structures, making it difficult to control humidity under high humidity conditions and affecting the accuracy of the test.
Low-temperature coils are used for dehumidification. By setting up horizontal spiral dehumidification coils, fans, inlet pipes and outlet pipes, an air circulation dehumidification system is formed. Combined with sealing rings and one-way solenoid valves, the orderly discharge of condensate and the sealing of the device prevent leakage are achieved.
It significantly improves dehumidification efficiency, ensuring that the humidity inside the chamber is quickly adjusted to the target range, guaranteeing the stability and accuracy of the test environment, and preventing air leakage and external air infiltration.
Smart Images
Figure CN224332188U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high and low temperature test chamber technology, specifically a high and low temperature test chamber that uses a low temperature coil for dehumidification. Background Technology
[0002] High and low temperature test chambers are indispensable core equipment in many fields such as aerospace, electronics, and materials science. They can simulate different temperature environments and are used to test the performance stability and reliability of products under extreme conditions.
[0003] Patent CN222918710U discloses a temperature-controllable high and low temperature test chamber, including a chamber body. The chamber body is equipped with a defrosting mechanism. The defrosting mechanism includes two sets of vertical sliding rods, two sets of horizontal rods, two sets of scrapers, horizontal sliding rods, two first triangular top blocks, two second triangular top blocks, two brackets, and an electric telescopic rod. The vertical sliding rods are fixedly connected to the bottom inner wall of the chamber body. The horizontal rods are slidably connected to the vertical sliding rods through sliding sleeves. Each set of horizontal rods consists of five rods arranged in an array. The scrapers are fixedly connected to the side of the horizontal rods near the inner wall of the chamber body, and one end of the scrapers is slidably connected to the inner wall of the chamber body.
[0004] Although the device uses an electric telescopic rod to move the horizontal sliding rod left and right, and the movement of the horizontal sliding rod causes the scrapers on both sides to move up and down simultaneously, defrosting both sides of the inner wall of the chamber at the same time, thus saving manpower and thus saving labor costs for the factory, the device does not have a structure for dehumidifying the inside of the chamber. This makes it difficult to reduce the humidity inside the chamber under high humidity conditions, which will affect the accuracy of subsequent experiments. In view of this, we propose a high and low temperature test chamber that uses a low temperature coil for dehumidification. Utility Model Content
[0005] The purpose of this utility model is to provide a high and low temperature test chamber that uses a low temperature coil for dehumidification. By setting up a dehumidification mechanism, including a horizontal spiral dehumidification coil, a dehumidification pipe, a fan, an inlet pipe, and an outlet pipe, the problem of difficult humidity control and poor dehumidification effect inside the chamber, which in turn affects the accuracy of the test, is solved.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A high and low temperature test chamber using a low-temperature coil for dehumidification includes a base plate, a chamber body fixed to the top surface of the base plate, a door hinged to the front side of the chamber body via two hinges, an electric heater and an electric cooler installed on the inner top surface of the chamber body, and further includes:
[0008] A dehumidification mechanism is installed on the right side surface of the cabinet and is used to dehumidify the air inside the cabinet. The dehumidification mechanism includes a dehumidification pipe installed on the right side surface of the cabinet, a fixed pipe installed on the right side surface of the cabinet and above the dehumidification pipe, a dehumidification coil installed on the inner wall of the dehumidification pipe, a fan installed on the inner circumference of the dehumidification pipe and to the left of the dehumidification coil, a second one-way solenoid valve installed on the outer circumference of the dehumidification pipe and to the left of the fan, an inlet pipe installed on the outer wall of the dehumidification coil and used to supply refrigerant to its interior, and an outlet pipe installed on the outer wall of the dehumidification coil and used to discharge the refrigerant from its interior. The dehumidification pipe and the fixed pipe are connected by a vent pipe.
[0009] In a preferred embodiment, the inlet pipe is fixed to the outer wall of the dehumidification coil near the left end and communicates with its inner cavity. The inlet pipe penetrates the circumferential inner wall of the dehumidification coil and extends to the top of the dehumidification coil. The outlet pipe is fixed to the outer wall of the dehumidification coil near the right end and communicates with its inner cavity. The outlet pipe penetrates the circumferential inner wall of the dehumidification coil and extends to the bottom of the dehumidification coil.
[0010] In a preferred embodiment, the dehumidifying coil is spiral in shape, and the dehumidifying coil is arranged inside the dehumidifying pipe from left to right, and a number of fixing posts are fixed between the dehumidifying coil and the dehumidifying pipe.
[0011] In a preferred embodiment, a plurality of water outlet pipes are fixed on the outer circumference of the dehumidification pipe near the bottom end, and a third one-way solenoid valve is installed on the outer wall of the water outlet pipes.
[0012] In a preferred embodiment, several of the water outlet pipes are installed on the outer wall of the dehumidification pipe in a linear and equidistant manner from left to right, and the positions of the several water outlet pipes correspond to those of the dehumidification coil and are adapted to each other in size.
[0013] In a preferred embodiment, sealing rings are provided at the contact points between the dehumidification pipe and the fixed pipe and the housing, sealing rings are provided at the contact points between the vent pipe, several water outlet pipes, liquid inlet pipe and liquid outlet pipe and the dehumidification pipe, and sealing rings are also provided at the contact points between the dehumidification coil and the liquid inlet pipe and the liquid outlet pipe.
[0014] These five settings enable dehumidification of the internal air, allowing the refrigerant to flow smoothly within the dehumidification coil, ensuring its cooling effect and improving dehumidification efficiency. They also ensure the dehumidification coil is securely installed within the dehumidification pipes and increase the contact area with the air for more thorough dehumidification. Furthermore, they allow condensate generated during dehumidification to drain promptly, preventing water accumulation from affecting the dehumidification effect. They ensure effective drainage of condensate from different locations, improving drainage efficiency, and guarantee a tight seal at all connections to prevent air leakage and the entry of outside air.
[0015] In a preferred embodiment, a humidifier is installed on the inner top surface of the box, a pressure relief pipe communicating with its inner cavity is fixed on the top surface of the box, a first one-way solenoid valve is installed on the outer circumferential wall of the pressure relief pipe, and a temperature sensor, a pressure sensor and a humidity sensor are installed on the rear inner wall of the box.
[0016] In a preferred embodiment, an L-shaped handle is installed on the front surface of the door near the right end, a sealing strip is provided at the part of the door that contacts the box body, and a sealing ring is provided at the part of the pressure relief pipe that contacts the box body.
[0017] These two features enable effective monitoring and regulation of temperature, humidity, and air pressure inside the chamber, meeting the requirements of the testing environment, facilitating the opening and closing of the chamber door, ensuring the airtightness of the chamber, and guaranteeing a stable internal environment.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] 1. This utility model achieves circulating dehumidification of the air inside the chamber through the coordinated arrangement of a horizontal spiral dehumidification coil, a fan, a vent pipe, and an inlet and outlet pipe. When the external coolant enters the spiral dehumidification coil through the inlet pipe, it can fully contact the air inside the chamber drawn into the dehumidification pipe by the fan. The condensation effect of the low-temperature coil efficiently removes moisture from the air. The dehumidified air then flows back to the chamber through the vent pipe, forming a continuous circulation. This design significantly increases the contact area and contact time between the air and the dehumidification coil. Combined with the power of the fan, it significantly improves the dehumidification efficiency, achieving the effect of quickly adjusting the humidity inside the chamber to the target range, ensuring that the test can be carried out smoothly under the set humidity conditions.
[0020] 2. This utility model achieves orderly discharge of condensate during dehumidification and leak-proof sealing of the device through the setting of multiple water outlet pipes, a third one-way solenoid valve, and multiple sealing rings. Water droplets condensed on the dehumidification coil will drip to the bottom of the dehumidification pipe. Multiple water outlet pipes with equal spacing can discharge condensate at different locations. The third one-way solenoid valve can precisely control the drainage timing to avoid air backflow affecting the dehumidification effect. At the same time, the sealing rings at the contact points between the dehumidification pipe, the fixed pipe and the cabinet, as well as at the connection points of each pipe, effectively prevent air leakage inside the cabinet and infiltration of external air, ensuring the stability of the environment inside the cabinet. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the internal structure of the box in this utility model;
[0023] Figure 3This is a schematic diagram of the overall structure of the dehumidification mechanism in this utility model;
[0024] Figure 4 This is a schematic diagram of the internal structure of the dehumidification tube in this utility model;
[0025] Figure 5 This is a partial structural diagram of the dehumidification mechanism in this utility model;
[0026] The meanings of the labels in the diagram are as follows:
[0027] 1. Base plate; 2. Cabinet body; 21. Cabinet door; 22. Handle; 23. Electric heater; 24. Electric refrigerator; 25. Humidifier; 26. Temperature sensor; 27. Pressure sensor; 28. Humidity sensor; 29. Pressure relief pipe; 210. First one-way solenoid valve; 3. Dehumidification mechanism; 31. Dehumidification pipe; 32. Fixing pipe; 33. Vent pipe; 34. Fan; 35. Dehumidification coil; 36. Liquid inlet pipe; 37. Liquid outlet pipe; 38. Second one-way solenoid valve; 39. Water outlet pipe; 310. Third one-way solenoid valve; 311. Fixing column. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.
[0029] Please see Figures 1-2 This utility model provides a technical solution: a high and low temperature test chamber that uses a low temperature coil for dehumidification, including a base plate 1, a chamber body 2 fixed on the top surface of the base plate 1, a door 21 that is hinged to the front side of the chamber body 2 by two hinges, and an electric heater 23 and an electric cooler 24 installed on the inner top surface of the chamber body 2.
[0030] The cabinet is equipped with a base plate 1, a box body 2, a door 21, an electric heater 23, and an electric refrigerator 24, which allow for adjustable high and low temperatures.
[0031] A humidifier 25 is installed on the inner top surface of the box 2. A pressure relief pipe 29 connected to the inner cavity is fixed on the top surface of the box 2. A first one-way solenoid valve 210 is installed on the outer circumference of the pressure relief pipe 29. A temperature sensor 26, a pressure sensor 27 and a humidity sensor 28 are installed on the inner rear wall of the box 2.
[0032] Through the humidifier 25, pressure relief pipe 29, first one-way solenoid valve 210 and various sensors, the sensors monitor the environment inside the chamber in real time, the humidifier replenishes humidity, and the pressure relief pipe regulates the air pressure, so that the temperature, humidity and air pressure inside the chamber are precisely controllable to meet diverse test requirements.
[0033] An L-shaped handle 22 is installed on the front surface of the door 21 near the right end. A sealing strip is provided at the part of the door 21 that contacts the body 2, and a sealing ring is provided at the part of the pressure relief pipe 29 that contacts the body 2.
[0034] The handle 22, sealing strip, and sealing ring facilitate the opening and closing of the chamber door 21. The sealing strip and sealing ring enhance the airtightness of the chamber 2, preventing the exchange of internal and external air from affecting the environment, ensuring stable temperature and humidity inside the chamber, and facilitating experimental operations.
[0035] In this embodiment, as Figures 1-5 As shown, it also includes: a dehumidification mechanism 3, which is set on the right side surface of the cabinet 2 and is used to dehumidify the air inside the cabinet 2. The dehumidification mechanism 3 includes a dehumidification pipe 31 installed on the right side surface of the cabinet 2, a fixed pipe 32 installed on the right side surface of the cabinet 2 and located above the dehumidification pipe 31, a dehumidification coil 35 installed on the inner wall of the dehumidification pipe 31, a fan 34 installed on the inner circumference of the dehumidification pipe 31 and located to the left of the dehumidification coil 35, a second one-way solenoid valve 38 installed on the outer circumference of the dehumidification pipe 31 and located to the left of the fan 34, an inlet pipe 36 installed on the outer wall of the dehumidification coil 35 and used to deliver refrigerant into it, and an outlet pipe 37 installed on the outer wall of the dehumidification coil 35 and used to discharge the refrigerant into it. The dehumidification pipe 31 and the fixed pipe 32 are connected by a vent pipe 33.
[0036] The dehumidification mechanism 3 includes dehumidification pipe 31, fixed pipe 32, etc., which work together to draw air from the fan 34 and condense and dehumidify through the dehumidification coil 35, so that the air inside the chamber is circulated and dehumidified to meet the humidity requirements of the test.
[0037] The liquid inlet pipe 36 is fixed to the outer wall of the dehumidification coil 35 near the left end and is connected to its inner cavity. The liquid inlet pipe 36 penetrates the inner circumference of the dehumidification tube 31 and extends to the top of the dehumidification tube 31. The liquid outlet pipe 37 is fixed to the outer wall of the dehumidification coil 35 near the right end and is connected to its inner cavity. The liquid outlet pipe 37 penetrates the inner circumference of the dehumidification tube 31 and extends to the bottom of the dehumidification tube 31.
[0038] The spiral dehumidification coil 35 and the fixing column 311 increase the contact area with air, allowing the air to be fully condensed and dehumidified; the fixing column makes the coil stable inside the dehumidification tube 31, avoiding shaking and affecting dehumidification, and ensuring a stable and efficient dehumidification process.
[0039] The dehumidification coil 35 is spiral in shape and is arranged inside the dehumidification pipe 31 from left to right. Several fixing posts 311 are fixed between the dehumidification coil 35 and the dehumidification pipe 31.
[0040] The spiral dehumidification coil 35 and the fixing column 311 increase the contact area with air, allowing the air to be fully condensed and dehumidified; the fixing column makes the coil stable inside the dehumidification tube 31, avoiding shaking and affecting dehumidification, and ensuring a stable and efficient dehumidification process.
[0041] Several water outlet pipes 39 are fixed on the outer circumference of the dehumidification pipe 31 near the bottom end, and a third one-way solenoid valve 310 is installed on the outer wall of the water outlet pipe 39.
[0042] The condensate is discharged in time through the outlet pipe 39 on the dehumidification pipe 31 and the third one-way solenoid valve 310, preventing water accumulation from affecting air circulation and coil cooling; the solenoid valve controls the timing of drainage to avoid backflow of air and ensure a stable dehumidification environment.
[0043] Several water outlet pipes 39 are installed on the outer wall of the dehumidification pipe 31 in a linear and equidistant manner from left to right, and the positions of the several water outlet pipes 39 correspond to the positions of the dehumidification coil 35 and are matched in size.
[0044] By using several equally spaced water outlet pipes 39 that correspond to the dehumidification coil 35, condensate from all parts of the coil can be discharged quickly, avoiding local water accumulation; the even distribution improves drainage efficiency, ensures that the inside of the dehumidification pipe 31 is dry, and maintains a good dehumidification state.
[0045] The dehumidification pipe 31 and the fixed pipe 32 are all equipped with sealing rings at the contact points with the cabinet 2. The vent pipe 33, several water outlet pipes 39, liquid inlet pipe 36 and liquid outlet pipe 37 are all equipped with sealing rings at the contact points with the dehumidification pipe 31. The dehumidification coil 35 is also equipped with sealing rings at the contact points with the liquid inlet pipe 36 and the liquid outlet pipe 37.
[0046] Multiple sealing rings are used to seal the connection points between the dehumidification pipe 31, the fixed pipe 32 and the chamber body 2, preventing air leakage inside the chamber and the entry of external air, ensuring stable temperature and humidity inside the chamber, avoiding external interference with the dehumidification effect, and improving the accuracy of the test.
[0047] It should be added that the electric heater 23, electric cooler 24, humidifier 25, temperature sensor 26, air pressure sensor 27, humidity sensor 28, first one-way solenoid valve 210, fan 34, second one-way solenoid valve 38, and third one-way solenoid valve 310 are all electrically connected to the external PLC and external power supply through wires, and the external PLC is also electrically connected to the external power supply through wires.
[0048] Finally, it should be noted that the electric heater 23, electric cooler 24, humidifier 25, temperature sensor 26, air pressure sensor 27, humidity sensor 28, first one-way solenoid valve 210, fan 34, second one-way solenoid valve 38, and third one-way solenoid valve 310 involved in this utility model are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the matching controller and power supply, are connected by wires. The specific connection method should refer to the working principle of this utility model. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.
[0049] In this embodiment, during actual use, the external PLC receives monitoring data from the temperature sensor 26, the air pressure sensor 27, and the humidity sensor 28 to achieve automatic control of each component.
[0050] When temperature adjustment is required, the PLC controls the electric heater 23 or the electric cooler 24 to turn on or off based on the data from the temperature sensor 26, so as to maintain the target temperature inside the chamber.
[0051] For humidity control, if dehumidification is required, the PLC activates the fan 34 and the second one-way solenoid valve 38 to draw air from the chamber into the dehumidification pipe 31. Simultaneously, it controls the external coolant circulation device to supply coolant to the dehumidification coil 35 via the inlet pipe 36. After the air is condensed and dehumidified by the coil, it returns to the chamber 2 through the vent pipe 33 and the fixed pipe 32. When the condensate accumulates to a certain amount, the PLC opens the third one-way solenoid valve 310, and the condensate is discharged through the outlet pipe 39. If humidification is required, the PLC starts the humidifier 25.
[0052] Regarding air pressure, the PLC controls the first one-way solenoid valve 210 to open the pressure relief pipe 29 based on the data from the air pressure sensor 27, thereby balancing the air pressure inside the box.
[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A high and low temperature test chamber using a low-temperature coil for dehumidification, comprising a base plate (1), characterized in that, A box (2) is fixed to the top surface of the base plate (1). A box door (21) is embedded in the front side of the box (2) and hinged to it by two hinges. An electric heater (23) and an electric cooler (24) are installed on the inner top surface of the box (2). The box also includes: A dehumidification mechanism (3) is installed on the right side surface of the box (2) and is used to dehumidify the air inside the box (2). The dehumidification mechanism (3) includes a dehumidification pipe (31) installed on the right side surface of the box (2), a fixed pipe (32) installed on the right side surface of the box (2) and located above the dehumidification pipe (31), a dehumidification coil (35) installed on the inner wall of the dehumidification pipe (31), a fan (34) installed on the inner circumference of the dehumidification pipe (31) and located to the left of the dehumidification coil (35), a second one-way solenoid valve (38) installed on the outer circumference of the dehumidification pipe (31) and located to the left of the fan (34), an inlet pipe (36) installed on the outer wall of the dehumidification coil (35) and used to deliver refrigerant to its interior, and an outlet pipe (37) installed on the outer wall of the dehumidification coil (35) and used to discharge the refrigerant inside its interior. The dehumidification pipe (31) and the fixed pipe (32) are connected by a vent pipe (33).
2. The high and low temperature test chamber using a low-temperature coil for dehumidification as described in claim 1, characterized in that: The inlet pipe (36) is fixed to the outer wall of the dehumidifying coil (35) near the left end and is connected to its inner cavity. The inlet pipe (36) penetrates the inner circumference of the dehumidifying tube (31) and extends to the top of the dehumidifying tube (31). The outlet pipe (37) is fixed to the outer wall of the dehumidifying coil (35) near the right end and is connected to its inner cavity. The outlet pipe (37) penetrates the inner circumference of the dehumidifying tube (31) and extends to the bottom of the dehumidifying tube (31).
3. The high and low temperature test chamber using a low-temperature coil for dehumidification as described in claim 1, characterized in that: The dehumidification coil (35) is spiral in shape and is arranged inside the dehumidification pipe (31) from left to right. Several fixing posts (311) are fixed between the dehumidification coil (35) and the dehumidification pipe (31).
4. The high and low temperature test chamber using a low-temperature coil for dehumidification according to claim 2, characterized in that: Several water outlet pipes (39) are fixed on the outer circumference of the dehumidification pipe (31) near the bottom end, and a third one-way solenoid valve (310) is installed on the outer wall of the water outlet pipe (39).
5. The high and low temperature test chamber using a low-temperature coil for dehumidification according to claim 4, characterized in that: Several of the water outlet pipes (39) are installed on the outer wall of the dehumidification pipe (31) in a linear and equidistant manner from left to right, and the positions of the several water outlet pipes (39) correspond to the positions of the dehumidification coil (35) and are adapted to each other in size.
6. The high and low temperature test chamber using a low-temperature coil for dehumidification according to claim 4, characterized in that: The dehumidification pipe (31) and the fixed pipe (32) are all provided with sealing rings at the parts that contact the box body (2). The ventilation pipe (33), several water outlet pipes (39), liquid inlet pipe (36) and liquid outlet pipe (37) are all provided with sealing rings at the parts that contact the dehumidification pipe (31). The dehumidification coil (35) is also provided with sealing rings at the parts that contact the liquid inlet pipe (36) and the liquid outlet pipe (37).
7. The high and low temperature test chamber using a low-temperature coil for dehumidification according to claim 1, characterized in that: A humidifier (25) is installed on the inner top surface of the box (2). A pressure relief pipe (29) connected to the inner cavity is fixed on the top surface of the box (2). A first one-way solenoid valve (210) is installed on the outer circumference of the pressure relief pipe (29). A temperature sensor (26), a pressure sensor (27), and a humidity sensor (28) are installed on the inner rear wall of the box (2).
8. The high and low temperature test chamber using a low-temperature coil for dehumidification according to claim 7, characterized in that: The front surface of the door (21) near the right end is equipped with an L-shaped handle (22). The part of the door (21) that contacts the box body (2) is provided with a sealing strip, and the part of the pressure relief pipe (29) that contacts the box body (2) is provided with a sealing ring.