Step-in constant temperature and humidity chamber with low temperature fluctuation
By designing a hardware connection structure in a walk-in constant temperature and humidity box, the water-cooling system absorbs the waste heat of the heater, the constant temperature fluctuation problem is solved and the good constant temperature effect is achieved.
Patent Information
- Application Number
- CN202421113005.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-20
AI Technical Summary
After the heater stops heating, the box temperature continues to rise in a short period of time due to the delay effect of heat transfer, resulting in high constant temperature fluctuations and poor constant temperature effect.
Design a hardware connection structure including temperature sensors, controllers and water cooling systems. When the heater stops heating, the controller controls the water cooling system to start, absorbing the residual heat left by the heater due to the thermal resistance to prevent the temperature in the box from rising continuously.
Effectively avoid high fluctuations in constant temperature, achieve good constant temperature effect, and ensure the temperature stability in the constant temperature and humidity chamber.
Smart Images
Figure CN222490123U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of test equipment, in particular to a walk-in constant temperature and humidity box with low temperature fluctuation. Background Art
[0002] Walk-in constant temperature and humidity chambers are widely used in home appliances, furniture and other industries. They can perform a variety of tests on large samples, such as high temperature aging test, low temperature aging test, dry aging test and humidity aging test. There are heaters and circulating fans in the constant temperature and humidity chamber. The heater heats the air to obtain hot air, and the circulating fan transports the hot air to every corner of the chamber to make the temperature in the chamber evenly distributed. The constant temperature and humidity chamber uses a controller to maintain a constant temperature. The constant temperature control process is: the temperature sensor in the constant temperature and humidity chamber detects the temperature in the chamber. If the temperature is lower than the preset value, the controller controls the heater to heat. If the temperature is higher than the preset value, the controller controls the heater to stop heating, thereby maintaining the temperature in the chamber at a certain temperature. When the heater heats, it transfers heat to the air in the chamber. The heat transfer will encounter resistance. This resistance is thermal resistance. Due to the existence of thermal resistance, the heat transfer has a delayed effect. After the temperature sensor detects overtemperature, even if the heater stops heating, due to the delay effect of heat transfer, the heater still retains residual heat. Driven by the circulating fan, the residual heat circulates in the box, causing the box temperature to continue to rise in the following short period of time, resulting in high constant temperature fluctuations and poor constant temperature effect. Utility Model Content
[0003] The purpose of the utility model is to provide a hardware connection structure for a walk-in constant temperature and humidity chamber. After the staff programs the controller in the hardware connection structure, the walk-in constant temperature and humidity chamber can avoid high constant temperature fluctuations due to the continuous rise in the temperature of the chamber within a short period of time after the heater stops heating during operation.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a walk-in constant temperature and humidity chamber with low temperature fluctuation, a heater is provided on the side wall on one side of the chamber, a mounting plate is provided under the heater in the chamber, a humidity regulating device is fixed on the upper surface of the mounting plate, a circulating fan is provided in the chamber, the circulating fan mixes the moisture emitted by the humidity regulating device and the hot air emitted by the heater evenly, and then transports them to the constant temperature area in the chamber, the constant temperature area in the chamber is provided with a temperature sensor, including a controller electrically connected to the heater, the humidity regulating device and the temperature sensor, and a water cooling system electrically connected to the controller is provided next to the heater in the chamber.
[0005] Preferably, there are multiple circulation fans.
[0006] Preferably, the circulation fan is a centrifugal fan.
[0007] Preferably, the constant temperature area is provided with a humidity sensor electrically connected to the controller.
[0008] Preferably, the water cooling system comprises a heat exchanger arranged beside the heater, whose water inlet is connected to a water pump via a water pipe and whose water outlet is connected to a cooling tower via a water pipe, and the water pump is electrically connected to a controller.
[0009] Preferably, the heat exchanger is a water pipe with corrugated inner and outer walls. The corrugated outer wall has a larger heat absorption area, and the corrugated inner wall slows down the flow rate of cold water.
[0010] Preferably, a control panel electrically connected to the controller is provided on the outside of the box, and the control panel displays real-time temperature and humidity information inside the box.
[0011] Preferably, the box body is provided with a box door, and the box door is provided with an observation window for observing the constant temperature area.
[0012] The beneficial effects of the utility model are:
[0013] After the staff programs the controller in the hardware connection structure, the walk-in constant temperature and humidity chamber uses the temperature sensor to obtain temperature data when it is running. If the temperature is higher than the preset value, the controller controls the heater to stop heating and starts the water cooling system to absorb the residual heat left by the heater due to thermal resistance, thereby preventing the temperature in the chamber from continuing to rise, thereby effectively avoiding high fluctuations in constant temperature and achieving a good constant temperature effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the internal structure of the walk-in constant temperature and humidity chamber from a side view;
[0015] Figure 2 This is a schematic diagram of the internal structure of the walk-in constant temperature and humidity chamber from the front view;
[0016] Figure 3 This is the connection diagram of the walk-in constant temperature and humidity chamber;
[0017] Figure 4 It is a schematic diagram of the external structure of a walk-in constant temperature and humidity chamber from the front view.
[0018] 1 humidity control equipment, 2 humidity sensor, 3 heater, 4 circulation fan, 5 water cooling system, 51 corrugated water pipe, 510 corrugated outer wall, 511 corrugated inner wall, 501 water inlet, 502 water outlet, 52 water pump, 53 cooling tower, 6 temperature sensor, 7 controller, 8 control panel, 9 box door, 10 observation window, 11 mounting plate, 12 constant temperature area. DETAILED DESCRIPTION
[0019] The present invention is further described in detail below in conjunction with specific implementation methods.
[0020] The controller mentioned below includes a memory and a processor connected to each other. A computer program is stored in the memory. When the computer program is executed by the processor, the functions of the controller are realized.
[0021] Walk-in constant temperature and humidity chamber Figure 1 As shown, a heater 3 is provided on the side wall of one side of the box, a mounting plate 11 is provided below the heater 3, a humidity control device 1 is fixed on the upper surface of the mounting plate 11, and three circulation fans 4 are provided below the mounting plate 11. The circulation fans 4 are specifically centrifugal fans, which evenly mix the moisture emitted by the humidity control device 1 and the hot air emitted by the heater 3, and then transport them to the constant temperature area 12 in the box, so that the humidity and temperature of the constant temperature area 12 are evenly distributed. Figure 2 As shown, the constant temperature area 12 is provided with a humidity sensor 2 and a temperature sensor 6. Figure 3 As shown, the walk-in constant temperature and humidity chamber includes a controller 7, which is electrically connected to a humidity regulating device 1, a heater 3, a humidity sensor 2 and a temperature sensor 6. The controller 7 controls the humidity regulating device 1 to humidify the air in the constant temperature area 12. After the humidity reaches a preset value set in the program of the controller 7, the controller 7 controls the humidity sensor 2 to detect the humidity. If the humidity is higher than the preset value, the controller 7 controls the humidity regulating device 1 to dehumidify. If the humidity is lower than the preset value, the controller 7 controls the humidity regulating device 1 to humidify. The controller 7 controls the heater 3 to heat the air in the constant temperature area 12. After the temperature reaches a preset value set in the program of the controller 7, the controller 7 controls the temperature sensor 6 to detect the temperature. If the temperature is lower than the preset value, the controller 7 controls the heater 3 to heat. If the temperature is higher than the preset value, the controller 7 controls the heater 3 to stop heating, and at the same time controls the water cooling system 5 provided beside the heater 3 to start, so that the water cooling system 5 absorbs the residual heat left by the heater 3 due to the existence of thermal resistance. If the detected temperature is lower than the preset value, the heater 3 is controlled to heat and the water cooling system 5 is shut down, so that the temperature in the constant temperature area 12 is restored to the preset value. After the constant temperature and humidity environment is adjusted, the walk-in constant temperature and humidity chamber tests the test items placed in the constant temperature area 12 .
[0022] Water cooling system 5 Figure 1, including a corrugated water pipe 51 disposed beside the heater 3, whose water inlet 501 is connected to a water pump 52 through a water pipe, and whose water outlet 502 is connected to a cooling tower 53 through a water pipe, and the water pump 52 is electrically connected to the controller 7. When the temperature sensor 6 detects that the temperature is higher than a preset value, the controller 7 controls the water pump 52 to transport the cold water in the cooling tower 53 to the corrugated water pipe 51, and the corrugated water pipe 51 acts as a heat exchanger to absorb the waste heat of the heater 3; the cold water becomes warm water after flowing through the corrugated water pipe 51, because the inner wall and the outer wall of the corrugated water pipe 51 are both corrugated, the heat absorption area of the corrugated outer wall 510 is large, and the corrugated inner wall 511 slows down the flow rate of the cold water, and the corrugated water pipe 51 can accelerate the speed of absorbing the waste heat when the cold water flows through. The corrugated water pipe 51 outputs the warm water to the cooling tower 53, and the cooling tower 53 cools the warm water to obtain cold water. The cold water is pumped by the water pump 52 to the corrugated water pipe 51 to absorb heat. Such a cycle can quickly absorb the waste heat of the heater 3 and avoid the temperature in the box from continuing to rise, thereby effectively avoiding high fluctuations in constant temperature and achieving a good constant temperature effect.
[0023] like Figure 4 As shown, a control panel 8 electrically connected to the controller 7 is provided on the outside of the box, and the control panel 8 displays the real-time temperature and humidity information in the box. The staff can use the control panel 8 to set the temperature and humidity of the test environment. The box is provided with a door 9, and the door 9 is provided with an observation window 10. The staff can know the test status of the test items in the constant temperature area 12 through the observation window 10.
[0024] The above is only an implementation method of the invention, and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the invention, which still fall within the scope of patent protection.
Claims
1. A walk-in constant temperature and humidity chamber with low temperature fluctuation, wherein a heater is provided on a side wall of one side of the chamber, a mounting plate is provided under the heater in the chamber, a humidity regulating device is fixed on the upper surface of the mounting plate, a circulating fan is provided in the chamber, the circulating fan evenly mixes the moisture emitted by the humidity regulating device and the hot air emitted by the heater, and then transports them to the constant temperature area in the chamber, the constant temperature area in the chamber is provided with a temperature sensor, including a controller electrically connected to the heater, the humidity regulating device and the temperature sensor, wherein the characteristics are: A water cooling system electrically connected to a controller is arranged beside the heater in the box.
2. The walk-in constant temperature and humidity chamber according to claim 1, characterized in that: There are multiple circulation fans.
3. The walk-in constant temperature and humidity chamber according to any one of claims 1 to 2, characterized in that: The circulation fan is a centrifugal fan.
4. The walk-in constant temperature and humidity chamber according to claim 1, characterized in that: The constant temperature area is provided with a humidity sensor electrically connected to the controller.
5. The walk-in constant temperature and humidity chamber according to claim 1, characterized in that: The water cooling system comprises a heat exchanger arranged beside the heater, the water inlet of the heat exchanger is connected to a water pump via a water pipe, the water outlet is connected to a cooling tower via a water pipe, and the water pump is electrically connected to a controller.
6. The walk-in constant temperature and humidity chamber according to claim 5, characterized in that: The heat exchanger is a water pipe with corrugated inner and outer walls. The corrugated outer wall has a larger heat absorption area, and the corrugated inner wall slows down the flow rate of cold water.
7. The walk-in constant temperature and humidity chamber according to claim 1, characterized in that: A control panel electrically connected to the controller is provided on the outside of the box, and the control panel displays real-time temperature and humidity information inside the box.
8. The walk-in constant temperature and humidity chamber according to claim 1, characterized in that: The box body is provided with a door, and the door is provided with an observation window for observing the constant temperature area.