CN112588333B - Constant-temperature and constant-humidity test box controlled by multiple temperature zones and multi-mode rapid temperature and humidity control method - Google Patents

Constant-temperature and constant-humidity test box controlled by multiple temperature zones and multi-mode rapid temperature and humidity control method Download PDF

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CN112588333B
CN112588333B CN202011357553.4A CN202011357553A CN112588333B CN 112588333 B CN112588333 B CN 112588333B CN 202011357553 A CN202011357553 A CN 202011357553A CN 112588333 B CN112588333 B CN 112588333B
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heat exchanger
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CN112588333A (en
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王新立
陈鸿
尹晓红
高丽
徐华太
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Shandong University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L7/00—Heating or cooling apparatus; Heat insulating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/18—Means for temperature control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/18—Means for temperature control
    • B01L2300/1838—Means for temperature control using fluid heat transfer medium
    • B01L2300/185—Means for temperature control using fluid heat transfer medium using a liquid as fluid

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Abstract

The utility model provides a constant temperature and humidity test box and a multi-mode quick temperature and humidity control method of multi-temperature zone control, which comprises the following steps: a high temperature regulating branch and a low temperature regulating branch; the high-temperature adjusting branch comprises a high-temperature liquid tank, a flow controller A and a heat exchanger A which are sequentially connected, and the heat exchanger A is connected with the fan through an adjustable humidifier; the low-temperature regulating branch comprises a low-temperature liquid tank, a flow controller B and a heat exchanger B which are connected in sequence; the fan drives the gas circulation in the working environment, and the temperature and the humidity of the environment in the box are rapidly adjusted through the cooperation of the two heat exchangers with different temperatures and the adjustable humidifier.

Description

Constant-temperature and constant-humidity test box controlled by multiple temperature zones and multi-mode rapid temperature and humidity control method
Technical Field
The disclosure belongs to the technical field of constant temperature and humidity test boxes, and particularly relates to a constant temperature and humidity test box controlled by multiple temperature zones and a multi-mode control method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The constant temperature and humidity test box is widely applied, mainly focuses on the fields of aerospace, aviation, petroleum, chemical engineering, automobiles, electronics, communication and the like, and is particularly used for providing a constant temperature and humidity change environment or performing temperature and humidity tests on a complete machine, instruments, materials and the like so as to judge whether the functions of the produced products are normal.
In the existing constant temperature and humidity test box, the temperature is generally adjusted by a heater or a cooler, when a product is tested, the temperature and humidity in the test box need to be accurately controlled at different levels, and a large amount of time is usually consumed to adjust the required temperature and (relative) humidity. The existing constant temperature and humidity test box usually adopts a single cold/heat source, and temperature and humidity control in the test box is realized by continuously adjusting the temperature of the cold/heat source. When the temperature and humidity fluctuation required by the test box is large, the cold/heat source temperature adjusting process needs a long time, so that the test efficiency is low, the tests on the heat resistance, cold resistance, drying resistance and moisture resistance of the instrument and meter products in multiple batches and in a wide temperature and humidity range are difficult to carry out, and the large-batch rapid test of the products is not facilitated.
In addition, the existing constant temperature and humidity test box mostly adopts a single heat source, cannot realize the control of multiple temperature zones, and cannot realize the temperature and humidity control in different modes.
Disclosure of Invention
In order to overcome the defects of the prior art, the present disclosure provides a constant temperature and humidity test chamber with multiple temperature zones, which has multiple temperature sources respectively responsible for multiple temperature and humidity control modes of the constant temperature and humidity test chamber, so as to achieve the purpose of rapid temperature and humidity control.
In order to achieve the above object, one or more embodiments of the present disclosure provide the following technical solutions:
on the one hand, the constant temperature and humidity test box with multi-temperature zone control is disclosed, which comprises:
a high temperature regulating branch and a low temperature regulating branch;
the high-temperature adjusting branch comprises a high-temperature liquid tank, a flow controller A and a heat exchanger A which are sequentially connected, and the heat exchanger A is connected with the fan through an adjustable humidifier;
the low-temperature regulating branch comprises a low-temperature liquid tank, a flow controller B and a heat exchanger B which are connected in sequence;
the fan drives the circulation of gas in the constant temperature and humidity test box, and the temperature and the humidity of the environment in the box are adjusted through the cooperation of the two heat exchangers with different temperatures and the adjustable humidifier.
According to a further technical scheme, the high-temperature liquid tank and the low-temperature liquid tank are respectively provided with a temperature adjusting device.
According to the further technical scheme, the flow controller A and the flow controller B are respectively composed of two water pumps and two valves, each water pump corresponds to one valve, and the heat exchanger A or the heat exchanger B is controlled to be in a working state or a stopping state.
In the above scheme, the water pump and the regulating valve or the water pump and the frequency conversion mode are adopted at the same time to regulate the circulation flow, work, stop and the like of the heat exchanger A and the heat exchanger B.
In a further technical scheme, the heat exchanger A and the heat exchanger B are composed of a liquid pipeline and a heat exchange coil and used for changing the temperature of gas.
On the other hand, the multi-mode control method of the constant temperature and humidity test box controlled by the multiple temperature zones is disclosed, and comprises the following steps: based on the fact that the temperature and the humidity of the current constant temperature and humidity test box are respectively T0And
Figure GDA0003217424690000021
the target temperature and humidity to be controlled are respectively T1And
Figure GDA0003217424690000022
calculating the moisture content H in the current constant temperature and humidity test chamber0And a target moisture content H1The dew point temperature T in the current constant temperature and humidity test chamberd0And target dew point temperature Td1And determining a control mode.
In a further technical solution, the determining of the control mode includes: when: t is0＝T1And H is0＜H1: a humidification mode; t is0＝T1And H is0＞H1: a dehumidification mode; h0＝H1And T is0＜T1: a heating mode; h0＝H1And T is0＞T1: a cooling mode; t is0＜T1And H is0＜H1: a heating and humidifying mode; t is0＜T1And H is0＞H1: a heating and dehumidifying mode; t is0＞T1And H is0＜H1: a cooling and humidifying mode; t is0＞T1And H is0＞H1: and (5) cooling and dehumidifying.
According to a further technical scheme, the humidification mode control method comprises the following steps: the heat exchanger A and the adjustable humidifier are in working states, the heat exchanger B is in a stop state, humidification is carried out in the humidification process, and the temperature adjusting device A is adjusted to enable the temperature of the high-temperature liquid tank to be higher than T1Adjusting the flow controller A to control the circulation volume of the high-temperature liquid and controlling the temperature of the circulating gas in the verification box to be T ═ T1Adjusting the humidification quantity of the adjustable humidifier to ensure that the humidity H in the constant temperature and humidity test box is equal to H1And finally obtaining the expected temperature and humidity environment.
The further technical scheme is that the dehumidification mode control method comprises the following steps: the method comprises two stages, namely a first stage, wherein the heat exchanger B is in a working state, the heat exchanger A and the adjustable humidifier are in a stop state, and the temperature adjusting device B is adjusted to enable the temperature of the low-temperature liquid tank to be lower than Td1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature T of the circulating gas in the verification box to be T ═ Td1Controlling the moisture content to the desired H1(ii) a In the second stage, the heat exchanger A is in a working state, the heat exchanger B and the adjustable humidifier are in a stop state, and the temperature adjusting device A is adjusted to enable the temperature of the high-temperature liquid tank to be higher than T1The flow controller A controls the circulation volume of the high-temperature liquid and controls the temperature of the circulating gas in the verification box to be T ═ T1And finally obtaining the expected temperature and humidity environment.
According to a further technical scheme, the heating mode control method comprises the following steps: the process is equivalent to the second stage of the dehumidification mode control method.
According to a further technical scheme, the cooling mode control method comprises the following steps: the heat exchanger B is in a working state, the heat exchanger A and the adjustable humidifier are in a stop state, and the temperature adjusting device B is adjusted to enable the temperature of the low-temperature liquid tank to be lower than T1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature of the circulating gas in the verification box to be T ═ T1And finally obtaining the expected temperature and humidity environment.
According to a further technical scheme, the temperature-rising and humidifying mode control method comprises the following steps: the heat exchanger A and the adjustable humidifier are in working states, the heat exchanger B is in a stop state, and the temperature adjusting device A is adjusted to enable the temperature of the high-temperature liquid tank to be higher than T1Adjusting the flow controller A to control the circulation volume of the high-temperature liquid and controlling the temperature of the circulating gas in the verification box to be T ═ T1Adjusting the humidification quantity of the adjustable humidifier to ensure that the humidity H in the constant temperature and humidity test box is equal to H1And finally obtaining the expected temperature and humidity environment.
The further technical scheme is that the temperature-rise dehumidification mode control method comprises the following steps: the method is consistent with the dehumidification mode control method.
According to a further technical scheme, the cooling and humidifying mode control method comprises the following steps: the heat exchanger B and the adjustable humidifier are in working states, the heat exchanger A is in a stop state, and the temperature adjusting device B is adjusted to enable the temperature of the low-temperature liquid tank to be lower than T1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature T of the circulating gas in the verification box to be T ═ T1Adjusting the humidification quantity of the adjustable humidifier to ensure that the humidity H in the constant temperature and humidity test box is equal to H1And finally obtaining the expected temperature and humidity environment.
The further technical scheme is that the cooling and dehumidifying mode control method comprises the following steps: the method comprises two stages, namely a first stage, wherein the heat exchanger B is in a working state, the heat exchanger A and the adjustable humidifier are in a stop state, and the temperature adjusting device B is adjusted to enable the temperature of the low-temperature liquid tank to be lower than Td1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature T of the circulating gas in the verification box to be T ═ Td1Controlling the moisture content to a desired H1(ii) a In the second stage, the heat exchanger B is in a working state, the heat exchanger A and the adjustable humidifier are in a stop state, and the temperature adjusting device B is adjusted to enable the temperature of the low-temperature liquid tank to be lower than T1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature of the circulating gas in the verification box to be T ═ T1And finally obtaining the expected temperature and humidity environment.
The above one or more technical solutions have the following beneficial effects:
the technical scheme includes that the high-temperature liquid tank and the low-temperature liquid tank are used as different temperature sources and are respectively responsible for controlling a plurality of temperature zones of the verification box, and according to the temperature and humidity states and requirements in the verification box, through the rapid temperature and humidity adjusting control in different modes, the high-temperature and low-temperature switching of a single temperature source is avoided so as to meet the requirements of various temperatures and (relative) humidity, the rapid control of the temperatures of the plurality of temperature sources is achieved, and the purpose of rapid temperature and humidity adjusting of the constant-temperature and constant-humidity test box is achieved.
According to the technical scheme, the temperature and humidity of the environment can be rapidly adjusted, compared with a universal product, the temperature and humidity change is large in the same time, and therefore verification in multiple batches and in a wide temperature and humidity range can be achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a schematic overall structure diagram of a constant temperature and humidity test chamber according to an embodiment of the disclosure;
in the figure, 1, a high-temperature liquid tank, 2, flow controllers A and 3, heat exchangers A and 4, a low-temperature liquid tank, 5, flow controllers B and 6, heat exchangers B and 7, a fan, 8, a working environment, 9, an adjustable humidifier, 10, temperature adjusting devices A and 11 and a temperature adjusting device B are shown.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
The embodiment discloses a constant temperature and humidity test chamber with multiple temperature zones, which is shown in the attached figure 1 and comprises:
a high temperature regulating branch and a low temperature regulating branch;
the high-temperature adjusting branch comprises a high-temperature liquid tank, a flow controller A and a heat exchanger A which are sequentially connected, and the heat exchanger A is connected with the fan through an adjustable humidifier;
the low-temperature regulating branch comprises a low-temperature liquid tank, a flow controller B and a heat exchanger B which are connected in sequence;
the fan drives the gas circulation in the working environment, and the temperature and the humidity of the environment in the regulating box are regulated through the cooperation of the two heat exchangers with different temperatures and the adjustable humidifier.
The controller is connected with the liquid tank and the heat exchanger respectively and plays a role in controlling flow direction and flow speed. When the heat exchanger needs to work, the valve is opened, and liquid in the liquid tank flows out by the water pump to change the temperature of the gas. When the heat exchanger stops working, the liquid is pumped by a water pump to flow back, and meanwhile, the valve is closed.
The high-temperature liquid tank (1) is connected with the heat exchanger A (3) through the flow controller A (2), and the low-temperature liquid tank (4) is connected with the heat exchanger B (6) through the flow controller B (5). The fan (7) drives the air in the working environment (8) to circulate, and the temperature and the humidity of the environment are rapidly adjusted through the cooperation of the two heat exchangers with different temperatures and the adjustable humidifier (9). Meanwhile, the temperature adjusting device A (10) and the temperature adjusting device B (11) are driven to finely adjust the temperature of the high-low temperature liquid tank.
In the specific implementation example, the high-temperature liquid tank (1) and the low-temperature liquid tank (4) should consider economic benefit under the condition of ensuring that the temperature meets the industrial requirement, and some liquids with smaller specific heat capacity can be adopted.
The flow controllers A (2) and B (5) are composed of two water pumps and two valves, and can control the direction and flow rate of liquid in the liquid tank and the heat exchanger. And controlling the heat exchanger to be in a working state or a stopping state. Arrows of three modules of the high-temperature liquid tank 1, the flow controller A2 and the heat exchanger A3 in the figure 1 are used for indicating the circulation of the high-temperature liquid, and three modules of the low-temperature liquid tank 4, the flow controller B5 and the heat exchanger B6 in the figure 1 are used for indicating the circulation of the low-temperature liquid.
The flow controller a is used for controlling the direction and flow rate of the liquid in the high-temperature liquid tank and the heat exchanger a, and the flow controller B is used for controlling the direction and flow rate of the liquid in the high-temperature liquid tank and the heat exchanger B.
The heat exchanger A (3) and the heat exchanger B (6) are composed of liquid pipelines and heat exchange coils, and the temperature of gas can be changed rapidly. The flow regulator can control whether the heat exchanger is in the working state or not.
The fan (7) is selected to have low power, so that the gas flow is ensured to be slow at a constant speed.
The working environment (8) is a sealed space, and unnecessary interference of instrument detection is reduced.
The adjustable humidifier (9) increases the absolute humidity of the gas, and a valve is designed in the adjustable humidifier, so that the humidification speed can be adjusted. In the humidification step, the air flow should be kept slow, so that the gas is fully humidified.
The temperature adjusting devices A (10) and B (11) are respectively used for adjusting the cold and heat source temperatures of the high-temperature liquid tank and the low-temperature liquid tank, the temperature adjusting range of the two liquid tanks is small, and rapid temperature adjustment can be realized.
In another embodiment, a multi-mode control method for a multi-temperature zone controlled assay box is disclosed, comprising: and determining a control mode. The temperature and the humidity of the constant temperature and humidity test chamber are respectively T0And
Figure GDA0003217424690000071
the target temperature and humidity to be controlled are respectively T1And
Figure GDA0003217424690000072
can calculate the target moisture content H in the current constant temperature and humidity test box0And H1Dew point temperature Td0And Td1When:
T0＝T1and H is0＜H1: a humidification mode;
T0＝T1and H is0＞H1: a dehumidification mode;
H0＝H1and T is0＜T1: a heating mode;
H0＝H1and T is0＞T1: a cooling mode;
T0＜T1and H is0＜H1: a heating and humidifying mode;
T0＜T1and H is0＞H1: a heating and dehumidifying mode;
T0＞T1and H is0＜H1: a cooling and humidifying mode;
T0＞T1and H is0＞H1: cooling dehumidifying mouldFormula (I);
specifically, the humidification mode control method comprises the following steps: the heat exchanger A and the adjustable humidifier 9 are in working states, the heat exchanger B is in a stop state, and the temperature adjusting device A11 is adjusted to enable the temperature of the high-temperature liquid tank (1) to be higher than T1Adjusting the flow controller A to control the circulation volume of the high-temperature liquid and controlling the temperature of the circulating gas in the verification box to be T ═ T1Adjusting the humidification quantity of the adjustable humidifier to ensure that the humidity H in the constant temperature and humidity test box is equal to H1And finally obtaining the expected temperature and humidity environment.
Specifically, the dehumidification mode control method comprises the following steps: the method comprises two stages, namely a first stage, a heat exchanger B is in a working state, a heat exchanger A and an adjustable humidifier 9 are in a stop state, and a temperature adjusting device B11 is adjusted to enable the temperature of a low-temperature liquid tank (4) to be lower than Td1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature T of the circulating gas in the verification box to be T ═ Td1(ii) a In the second stage, the heat exchanger A is in a working state, the heat exchanger B and the adjustable humidifier 9 are in a stop state, and the temperature adjusting device A11 is adjusted to enable the temperature of the high-temperature liquid tank (1) to be higher than T1The flow controller A controls the circulation volume of the high-temperature liquid and controls the temperature of the circulating gas in the verification box to be T ═ T1And finally obtaining the expected temperature and humidity environment.
Specifically, the temperature-raising mode control method comprises the following steps: the process is equivalent to the second stage of the dehumidification mode control method.
Specifically, the cooling mode control method comprises the following steps: the heat exchanger B is in a working state, the heat exchanger A and the adjustable humidifier 9 are in a stop state, and the temperature regulating device B11 is regulated to ensure that the temperature of the low-temperature liquid tank (4) is lower than T1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature of the circulating gas in the verification box to be T ═ T1And finally obtaining the expected temperature and humidity environment.
Specifically, the temperature-raising and humidifying mode control method comprises the following steps: the heat exchanger A and the adjustable humidifier 9 are in working states, the heat exchanger B is in a stop state, and the temperature adjusting device A11 is adjusted to enable the temperature of the high-temperature liquid tank (1) to be higher than T1Adjusting the flow controller A to control the circulation volume of the high-temperature liquid and controlling the temperature of the circulating gas in the verification box to be T ═ T1The humidification quantity of the adjustable humidifier is adjusted to ensure that the humidity in the constant temperature and humidity test box is keptDegree H ═ H1And finally obtaining the expected temperature and humidity environment.
Specifically, the temperature-rise dehumidification mode control method comprises the following steps: the method is consistent with the dehumidification mode control method.
Specifically, the cooling and humidifying mode control method comprises the following steps: the heat exchanger B and the adjustable humidifier 9 are in working states, the heat exchanger A is in a stop state, and the temperature adjusting device B11 is adjusted to enable the temperature of the low-temperature liquid tank (4) to be lower than T1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature T of the circulating gas in the verification box to be T ═ T1Adjusting the humidification quantity of the adjustable humidifier to ensure that the humidity H in the constant temperature and humidity test box is equal to H1And finally obtaining the expected temperature and humidity environment.
Specifically, the control method of the cooling and dehumidifying mode comprises the following steps: the method comprises two stages, namely a first stage, a heat exchanger B is in a working state, a heat exchanger A and an adjustable humidifier 9 are in a stop state, and a temperature adjusting device B11 is adjusted to enable the temperature of a low-temperature liquid tank (4) to be lower than Td1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature T of the circulating gas in the verification box to be T ═ Td1(ii) a In the second stage, the heat exchanger B is in a working state, the heat exchanger A and the adjustable humidifier 9 are in a stop state, and the temperature adjusting device B11 is adjusted to enable the temperature of the low-temperature liquid tank (4) to be lower than T1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature of the circulating gas in the verification box to be T ═ T1And finally obtaining the expected temperature and humidity environment.
With respect to relative humidity according to temperature T
Figure GDA0003217424690000083
The moisture content and the dew point temperature are calculated,
partial pressure of saturated water vapour at a certain temperature
Figure GDA0003217424690000081
Can be determined by using a fitting relation,
Figure GDA0003217424690000082
water vapor partial pressure of air
Figure GDA0003217424690000091
The saturation temperature at a certain partial pressure of water vapor, i.e., the dew point temperature, can be determined using a standard data fit relationship:
Figure GDA0003217424690000092
moisture content refers to the mass of dry air containing water vapor,
Figure GDA0003217424690000093
symbol: t is air temperature (DEG C); t isdAir dew point temperature (deg.C);
Figure GDA0003217424690000094
is the saturated water vapor partial pressure (Pa) of air at the temperature; pwIs the water vapor partial pressure (Pa) of air at the temperature; a is0-a2As fitting parameters, fitting can be performed from the standard data; b0-b2As fitting parameters, fitting can be performed from the standard data;
Figure GDA0003217424690000095
relative humidity (%) of air; p ambient pressure, generally atmospheric pressure, may be 101325 (Pa); h is the air moisture content (kg/kg dry air).
Air water vapor partial pressure: relative humidity refers to the percentage of air saturated relative to the amount contained in the air
RH＝H/A
Relative Humidity (RH)
H-actual water vapor density
A is saturated air density
Firstly, theoretical calculation is carried out, and specific data of the temperature T1 and the relative humidity RH1 of the current gas are acquired. The absolute humidity H1 of the gas in the current state can be obtained from the corresponding relationship table of the temperature, the relative humidity and the absolute humidity. Meanwhile, the absolute humidity H2 is calculated from the temperature T2, relative humidity RH2 of the expected gas. The process of the gas state change usually requires an intermediate state, which is required to satisfy the relative humidity RH ═ 100%, the absolute humidity H ═ H2, and then calculate the corresponding temperature T.
The specific data of the temperature T1 and the relative humidity RH1 of the current gas are acquired by means of sensors. The constant temperature and humidity test box aims to measure whether a batch of new products are qualified or not, and is accurate and sensitive. The data is considered reliable for the product passing the test.
H in this example of implementation may be understood as the real-time absolute humidity of the environment. H1 and H2 are understood to be fixed values. At the very beginning H1, we adjusted the temperature and humidity of the environment so that H finally has the value H2.
In actual operation, the absolute humidity H1 and H2 are determined, and if H1> H2, the adjustable humidifier (8) is not needed, otherwise, the adjustable humidifier is turned on. Changing the temperature of the heat exchanger (4) to make the gas temperature in the working environment undergo a temperature changing process, which comprises the following steps: t1- > T × > T2.
Those skilled in the art will appreciate that the modules or steps of the present disclosure described above can be implemented using general purpose computer means, or alternatively, they can be implemented using program code executable by computing means, whereby the modules or steps may be stored in memory means for execution by the computing means, or separately fabricated into individual integrated circuit modules, or multiple modules or steps thereof may be fabricated into a single integrated circuit module. The present disclosure is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.

Claims (8)

1. Constant temperature and humidity test box of multi-temperature-zone control, characterized by includes:
a high temperature regulating branch and a low temperature regulating branch;
the high-temperature adjusting branch comprises a high-temperature liquid tank, a flow controller A and a heat exchanger A which are sequentially connected, and the heat exchanger A is connected with the fan through an adjustable humidifier;
the low-temperature regulating branch comprises a low-temperature liquid tank, a flow controller B and a heat exchanger B which are connected in sequence;
the fan drives the circulation of gas in the constant temperature and humidity test box, and the temperature and the humidity of the environment in the box are adjusted through the cooperation of the two heat exchangers with different temperatures and the adjustable humidifier;
the high-temperature liquid tank and the low-temperature liquid tank are respectively provided with a temperature adjusting device;
the current temperature and humidity of the constant temperature and humidity test chamber based on the multi-temperature zone control are respectively T0And
Figure FDA0003245001750000011
the target temperature and humidity to be controlled are respectively T1And
Figure FDA0003245001750000012
calculating the moisture content H in the current constant temperature and humidity test chamber0And a target moisture content H1The dew point temperature T in the current constant temperature and humidity test chamberd0And target dew point temperature Td1Determining a control mode;
the determination of the control mode includes: when T is0＝T1And H is0＜H1: a humidification mode; t is0＝T1And H is0＞H1: a dehumidification mode; h0＝H1And T is0＜T1: a heating mode; h0＝H1And T is0＞T1: a cooling mode; t is0＜T1And H is0＜H1: a heating and humidifying mode; t is0＜T1And H is0＞H1: a heating and dehumidifying mode; t is0＞T1And H is0＜H1: a cooling and humidifying mode; t is0＞T1And H is0＞H1: a cooling and dehumidifying mode;
the control method of the humidification mode comprises the following steps: the heat exchanger A and the adjustable humidifier are in working states, the heat exchanger B is in a stop state, and the temperature adjusting device A is adjusted to enable the temperature of the high-temperature liquid tank to be higher than T1Adjusting the flow controller A to control the circulation volume of the high-temperature liquid and controlling the temperature of the circulating gas in the verification box to be T ═ T1Adjusting the humidification quantity of the adjustable humidifier to ensure that the humidity H in the constant temperature and humidity test box is equal to H1Finally obtaining the expected temperature and humidity environment;
the control method of the dehumidification mode comprises the following steps: the method comprises two stages, namely a first stage, wherein the heat exchanger B is in a working state, the heat exchanger A and the adjustable humidifier are in a stop state, and the temperature adjusting device B is adjusted to enable the temperature of the low-temperature liquid tank to be lower than Td1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature T of the circulating gas in the verification box to be T ═ Td1(ii) a In the second stage, the heat exchanger A is in a working state, the heat exchanger B and the adjustable humidifier are in a stop state, and the temperature adjusting device A is adjusted to enable the temperature of the high-temperature liquid tank to be higher than T1The flow controller A controls the circulation volume of the high-temperature liquid and controls the temperature of the circulating gas in the verification box to be T ═ T1And finally obtaining the expected temperature and humidity environment.
2. The constant temperature and humidity test chamber with multi-temperature zone control according to claim 1, wherein the flow controllers A and B are respectively composed of two water pumps and two valves, each water pump corresponds to one valve, and the heat exchangers A or B are controlled to be in a working state or a stop state.
3. The multi-temperature-zone controlled constant temperature and humidity test chamber according to claim 1, wherein the heat exchanger A and the heat exchanger B are composed of a liquid pipeline and a heat exchange coil and are used for changing the temperature of the gas.
4. The multi-mode rapid temperature and humidity control method of the constant temperature and humidity test chamber with multi-temperature zone control according to claim 1, characterized in that the temperature rise mode control method comprises the following steps: the process is equivalent to the second stage of the dehumidification mode control method.
5. The multi-mode rapid temperature and humidity control method of the constant temperature and humidity test chamber with multi-temperature zone control according to claim 1, which is characterized in that the cooling mode control method comprises the following steps: the heat exchanger B is in a working state, the heat exchanger A and the adjustable humidifier are in a stop state, and the temperature adjusting device B is adjusted to enable the temperature of the low-temperature liquid tank to be lower than T1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature of the circulating gas in the verification box to be T ═ T1And finally obtaining the expected temperature and humidity environment.
6. The multi-mode rapid temperature and humidity control method of the constant temperature and humidity test chamber with multi-temperature zone control according to claim 1, which is characterized in that the temperature and humidity raising and controlling method comprises the following steps: the heat exchanger A and the adjustable humidifier are in working states, the heat exchanger B is in a stop state, and the temperature adjusting device A is adjusted to enable the temperature of the high-temperature liquid tank to be higher than T1Adjusting the flow controller A to control the circulation volume of the high-temperature liquid and controlling the temperature of the circulating gas in the verification box to be T ═ T1Adjusting the humidification quantity of the adjustable humidifier to ensure that the humidity H in the constant temperature and humidity test box is equal to H1And finally obtaining the expected temperature and humidity environment.
7. The multi-mode rapid temperature and humidity control method of the constant temperature and humidity test chamber with multi-temperature zone control according to claim 1, which is characterized in that the temperature rise and humidity reduction mode control method comprises the following steps: the method is consistent with the dehumidification mode control method.
8. According to the rightThe multi-mode rapid temperature and humidity control method of the constant temperature and humidity test chamber with multi-temperature zone control according to claim 1, is characterized in that the temperature reduction and humidification mode control method comprises the following steps: the heat exchanger B and the adjustable humidifier are in working states, the heat exchanger A is in a stop state, and the temperature adjusting device B is adjusted to enable the temperature of the low-temperature liquid tank to be lower than T1The flow controller B controls the circulation volume of the low-temperature liquid and controls the temperature T of the circulating gas in the verification box to be T ═ T1Adjusting the humidification quantity of the adjustable humidifier to ensure that the humidity H in the constant temperature and humidity test box is equal to H1And finally obtaining the expected temperature and humidity environment.
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