Temperature and humidity control device for low-temperature and constant-temperature and humidity box and method

A constant temperature and humidity chamber, temperature and humidity control technology, applied in the direction of non-electric variable control, control/regulation system, simultaneous control of multiple variables, etc., can solve the problem that the relative humidity is difficult to reach a high humidity state, and the adverse effects on the accuracy of experimental results , low humidification capacity and other issues, to achieve the effect of easy control, high sensitivity and reduced energy loss

Active Publication Date: 2016-11-09
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the structural cross-linking relationship between the temperature of the evaporator and the temperature of the constant temperature and humidity box in the prior art, there is a large heat transfer temperature difference of about 10°C during operation. When the set temperature of the constant temperature and humidity box is 10 When the temperature is

Method used

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  • Temperature and humidity control device for low-temperature and constant-temperature and humidity box and method
  • Temperature and humidity control device for low-temperature and constant-temperature and humidity box and method
  • Temperature and humidity control device for low-temperature and constant-temperature and humidity box and method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1:

[0036] Such as figure 1 As shown, a temperature and humidity control device for a low temperature, constant temperature and humidity box includes a constant temperature and humidity external control unit 1. In the constant temperature and humidity external control unit 1, a constant temperature and humidity internal control unit 2 is fixed in space, and the internal temperature and humidity The space between the control unit 2 and the constant temperature and humidity external control unit 1 constitutes an air flow channel, in which a heater 31, an evaporator 32, and a turbulent heat exchange excitation fan 3 are installed; the front of the constant temperature and humidity internal control unit 2 The sample door 21 is provided with a visual window 22; the remaining surfaces of the constant temperature and humidity internal control unit 2 are seamlessly welded by thin metal plates with excellent thermal conductivity, and together with the sample door 21, a clos...

Example Embodiment

[0043] Example 2:

[0044] Regarding the temperature and humidity control method performed by the temperature and humidity control device of a low temperature, constant temperature and humidity box of any one of the above, considering the structural characteristics, since the constant temperature and humidity internal control unit 2 and the constant temperature and humidity external control unit 1 are opposite each other Independently closed, there is a controllable association, that is, the constant temperature and humidity unit is separated from the refrigeration unit evaporator 32 and the heating unit heater 31. Correspondingly, the control method is relatively independent and can perform precise association operations on demand. Specific steps are as follows:

[0045] 1) First, put the experimental sample 9 on the sample tray 8 of the constant temperature and humidity internal control unit 2, and close the sample door 21. At this time, the shutters 51 of the humidification wate...

Example Embodiment

[0049] Example 3: Two adjustable heat and humidity exchange ports 23 are provided, including the one mentioned in Example 1, and another at the lower side of the turbulent humidification fan 4 and the turbulent heat of the constant temperature and humidity internal control unit 2 Exchanging excitation fan 3 on the front side, two adjustable heat and humidity exchange ports 23 are opened at the same time, so that the airflow forms the so-called drooping effect, avoiding the internal temperature and humidity internal control unit 2 from causing poor exhaust due to negative pressure, and accelerating the constant temperature and humidity. The moisture in the wet cell quickly exchanges with the relatively cold and dry gas in the air flow channel. When the two adjustable heat and humidity exchange ports 23 are closed at the same time, the constant temperature and humidity internal control unit 2 is restored to the externally closed state, and the rest of the structure is the same as ...

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Abstract

The invention relates to a temperature and humidity control device for a low-temperature and constant-temperature and humidity box and a method. The temperature and humidity control device includes a constant-temperature and humidity external control unit, a constant-temperature and humidity internal control unit and an airflow channel therebetween; a heater, an evaporator and a turbulence heat exchange excitation fan are arranged in the airflow channel; the constant-temperature and humidity internal control unit is a closed constant-temperature and humidity unit comprising a test piece door with a visual window; a turbulence humidification fan and a humidification water tank are arranged at the bottom of the constant-temperature and humidity unit; the upper cover of the humidifier water tank is a louver which can be closed; the upper part of the constant-temperature and humidity internal control unit is provided with an adjustable heat and humid exchange opening which makes the interior and exterior of the constant-temperature and humidity internal control unit are communicated controllably; and the constant-temperature and humidity internal control unit is provided with a temperature and humidity test probe and a test piece tray. The temperature and humidity control device of the invention is characterized in that the constant-temperature and humidity unit operates independently and is not directly in cross linkage with heating and cooling units; and the constant-temperature and humidity unit can be in controllable linkage with the outside so as to carry out humid elimination. According to an operation method, at first, temperature is adjusted, and then independent humidification is carried out; and if humidity is too large, the adjustable heat and humid exchange opening is opened so as to be communicated with the outside to carry out humid elimination.

Description

technical field [0001] The invention belongs to the technical field of low temperature and constant temperature and humidity chambers, and in particular relates to a temperature and humidity control device and a control method for the low temperature and constant temperature and humidity chambers. Background technique [0002] The constant temperature and humidity chamber is widely used in various scientific and technological fields, and has a wide range of applications in scientific research, medical treatment, fresh-keeping and cultivation. In these areas, relative humidity plays a crucial role. [0003] For example, relative humidity is one of the factors that affect the degree of chilling injury during storage of fruits and vegetables. For some fruits and vegetables, increasing the relative humidity of the storage environment during storage can reduce the occurrence of chilling injury. At 0°C, the chilling damage spots on the fruit surface of cucumbers and peppers in an...

Claims

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Application Information

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IPC IPC(8): G05D27/02
CPCG05D27/02
Inventor 张敏艾文婷李春晖朱赛赛
Owner SHANGHAI OCEAN UNIV
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