CN107328013B

CN107328013B - Humidity control method and device

Info

Publication number: CN107328013B
Application number: CN201610281651.1A
Authority: CN
Inventors: 马亮峰; 王�锋; 马丽强
Original assignee: Vertiv Tech Co Ltd
Current assignee: Vertiv Tech Co Ltd
Priority date: 2016-04-29
Filing date: 2016-04-29
Publication date: 2020-04-03
Anticipated expiration: 2036-04-29
Also published as: CN107328013A

Abstract

The invention discloses a humidity control method and a device, firstly, detecting the current temperature and the current dew point temperature of circulating air; judging whether the current temperature of the circulating air is within a set dew point temperature control range or not; if so, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air, so that the dew point temperature of the processed circulating air is not lower than the set lowest dew point temperature value and not higher than the set highest dew point temperature value, and the relative humidity of the processed circulating air is not higher than the set highest relative humidity value. Namely, the humidity can be controlled by adopting the dew point temperature according to the physical properties of the air, and the influence of the temperature on the relative humidity is avoided, so that the condition that the air conditioner dehumidifies and humidifies at the same time is avoided to the greatest extent, and the effects of saving energy and water are achieved; and the possibility of temperature and humidity fluctuation of the processed air is reduced, and the reliability and the accuracy of temperature and humidity control are improved.

Description

Humidity control method and device

Technical Field

The invention relates to the field of automatic control, in particular to a humidity control method and device.

Background

With the more and more extensive application of air conditioners, various industries gradually put forward higher requirements on the air conditioners, not only the requirements on the control precision of the environmental temperature and the humidity are higher, but also new requirements on the aspects of energy conservation, water conservation, cleanness and the like are put forward. These users are mainly concentrated on computer rooms, food production, operating rooms, medicine manufacturing, chemical production and other occasions.

At present, for the occasions needing precise temperature and humidity control, such as computer rooms and the like, the temperature and humidity control can be mainly realized through a conventional temperature-humidity control logic. Specifically, the conventional temperature control logic may be: the machine room air conditioner sets a target temperature and an allowable deviation, and controls the state of refrigeration output of the air conditioning unit after calculation through a pre-edited control algorithm according to the temperature detected by the temperature sensor: loading, holding, unloading to ensure that the circulating air temperature is within the set target temperature and allowed deviation. Conventional humidity control logic may be: the air conditioner in the machine room sets a target relative humidity and an allowable deviation, and controls the output states of unit humidification and dehumidification after calculating through a pre-edited control algorithm according to the relative humidity detected by a temperature and humidity sensor: loading, holding, unloading to ensure that the circulating air relative humidity is within the set target relative humidity and allowable deviation.

However, due to the physical properties of air, when air conditioning is performed, the surface temperature of the heat exchanger may be lower than the dew point temperature of the circulating air, and at this time, the air conditioning unit dehumidifies; when the dehumidified air is circulated back to the air conditioning unit, the relative humidity of the air may be lower than the set relative humidity, so that the air conditioning unit can humidify again, and the air conditioning unit can perform refrigeration dehumidification and humidification simultaneously.

For the occasions needing precise temperature and humidity control, such as computer rooms, the requirements of the computer rooms on the temperature and humidity are relatively wide according to relevant standards or the requirements of servers on the temperature and humidity of the computer rooms. That is, when the dehumidified air is circulated back to the unit, if the relative humidity of the air is lower than the set relative humidity, the humidity of the room may be sufficient even if the humidifier is not humidified.

That is to say, when the control of computer lab humiture is carried out according to conventional temperature-humidity control logic, very easily appear computer lab air conditioner dehumidification on one side, the humidifier is at the endless loop of humidification again simultaneously, leads to the unit energy consumption to increase, and can cause the waste of certain degree of water resource. Moreover, the continuous humidification and dehumidification of the air conditioner can cause load change, so that the unit is continuously loaded and unloaded, the temperature and the humidity of the processed air are easy to generate large fluctuation, and the reliability and the accuracy of temperature and humidity control of the air conditioner are reduced.

Disclosure of Invention

The embodiment of the invention provides a humidity control method and a humidity control device, which are used for solving the problems of low reliability and accuracy and waste of resources such as electricity, water and the like in the conventional temperature and humidity control mode.

The embodiment of the invention provides a humidity control method, which comprises the following steps:

detecting the current temperature and the current dew point temperature of the circulating air;

judging whether the current temperature of the circulating air is within a set dew point temperature control range or not;

if so, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air according to the current temperature and the current dew point temperature of the circulating air, so that the dew point temperature of the processed circulating air is not lower than the set lowest dew point temperature value and not higher than the set highest dew point temperature value, and the relative humidity of the processed circulating air is not higher than the set highest relative humidity value;

wherein the set dew point temperature minimum value is not higher than the set dew point temperature maximum value.

It should be noted that, a first boundary of the dew point temperature control range is not lower than a set over-low temperature alarm value, and a second boundary of the dew point temperature control range is not higher than a set over-high temperature alarm value; or the first boundary of the dew point temperature control range is lower than the set over-low temperature alarm value, and the second boundary of the dew point temperature control range is higher than the set over-high temperature alarm value; wherein a first boundary of the dew point temperature control range is lower than a second boundary of the dew point temperature control range.

Optionally, if it is determined that the current temperature of the circulating air is within the set dew point temperature control range, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air according to the current temperature and the current dew point temperature of the circulating air, so that the dew point temperature of the processed circulating air is not lower than the set dew point temperature lowest value and not higher than the set dew point temperature highest value, and the relative humidity of the processed circulating air is not higher than the set relative humidity highest value, including:

if the non-condensation dew point temperature is determined to be not lower than the set dew point temperature lowest value and not higher than the set dew point temperature highest value, executing the following operations:

if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value, controlling the unit to humidify by taking the minimum dew point temperature value as a target until the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value;

if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value, the unit is controlled not to be humidified, and the unit is controlled to perform dehumidification by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the set maximum relative humidity value;

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, the current relative humidity of the circulating air is not higher than the set highest relative humidity value, and the current temperature of the circulating air is not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, the unit is controlled not to humidify, or the unit is controlled to humidify by taking the non-condensation dew point temperature or the set ideal dew point temperature as a target, or the unit is controlled to dehumidify and humidify by taking the set target value of the relative humidity as a target; wherein the set ideal dew point temperature is higher than the lowest dew point temperature value and lower than the highest dew point temperature value;

and if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, and the current temperature of the circulating air is higher than the over-temperature alarm value or the current temperature of the circulating air is lower than the over-temperature alarm value, controlling the unit not to humidify and not to dehumidify.

Further, if it is determined that the current dew point temperature of the circulating air is not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, and the current relative humidity of the circulating air is not higher than the set highest relative humidity value, and the current temperature of the circulating air is not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, the unit is controlled not to humidify, or the unit is controlled to humidify with the non-condensation dew point temperature or the set ideal dew point temperature as a target, or the unit is controlled to dehumidify and humidify with the set target value of relative humidity as a target, including:

judging whether to refer to the set ideal dew point temperature or not when the humidity control is carried out;

if so, controlling the unit not to humidify or controlling the unit to humidify by taking the non-condensation dew point temperature as a target and enabling the dew point temperature of the processed circulating air to be not higher than the non-condensation dew point temperature if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature and not higher than the ideal dew point temperature and the non-condensation dew point temperature is not higher than the ideal dew point temperature; or if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the ideal dew point temperature, and the non-condensation dew point temperature is higher than the ideal dew point temperature, the unit is controlled not to be humidified, or the unit is controlled to be humidified by taking the ideal dew point temperature as a target, and the dew point temperature of the processed circulating air is not higher than the non-condensation dew point temperature; or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the maximum dew point temperature, and the non-condensation dew point temperature is not higher than the ideal dew point temperature, controlling the unit not to humidify, or controlling the unit to dehumidify and humidify by taking a set relative humidity target value as a target; or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the maximum dew point temperature and the non-condensation dew point temperature is determined to be higher than the ideal dew point temperature, the unit is controlled not to be humidified, or the unit is controlled to perform dehumidification by taking the ideal dew point temperature as a target, and the dew point temperature of the processed circulating air is not higher than the non-condensation dew point temperature;

if not, if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the dew point temperature without condensation, the unit is controlled not to be humidified, or the unit is controlled to be humidified by taking the dew point temperature without condensation as a target, and the dew point temperature of the processed circulating air is not higher than the dew point temperature without condensation; or if the current dew point temperature of the circulating air is determined to be higher than the non-condensation dew point temperature and not higher than the dew point temperature maximum value, the unit is controlled not to humidify, or the unit is controlled to dehumidify and humidify by taking a set relative humidity target value as a target.

and if the dew point temperature without condensation is determined to be lower than the set lowest dew point temperature value, controlling the unit to humidify by taking the lowest dew point temperature value as a target until the dew point temperature of the processed circulating air is not lower than the lowest dew point temperature value.

if the dew point temperature without condensation is determined to be higher than the set dew point temperature maximum value, executing the following operations:

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, the current relative humidity of the circulating air is not higher than the set highest relative humidity value, and the current temperature of the circulating air is not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, the unit is controlled not to be humidified, or the unit is controlled to humidify by taking the set ideal dew point temperature as a target, or the unit is controlled to dehumidify and humidify by taking a set relative humidity target value as a target; wherein the set ideal dew point temperature is higher than the lowest dew point temperature value and lower than the highest dew point temperature value;

Further, if it is determined that the current dew point temperature of the circulating air is not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, the current relative humidity of the circulating air is not higher than the set highest relative humidity value, and the current temperature of the circulating air is not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, the unit is controlled not to be humidified; or, the control unit uses the set ideal dew point temperature as the target to humidify, or the control unit uses the set relative humidity target value as the target to dehumidify and humidify, comprising:

if so, controlling the unit not to humidify or controlling the unit to humidify by taking the ideal dew point temperature as a target if the current dew point temperature of the circulating air is determined to be not lower than the minimum value of the dew point temperature and not higher than the ideal dew point temperature; or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the dew point temperature maximum value, controlling the unit not to humidify, or controlling the unit to dehumidify and humidify by taking a set relative humidity target value as a target;

if not, the control unit does not humidify, or the control unit performs dehumidification and humidification by taking the set relative humidity target value as a target.

Further, the method further comprises: and if the current temperature of the circulating air is determined to be out of the set dew point temperature control range, controlling the unit not to humidify and dehumidify.

Based on the same inventive concept, an embodiment of the present invention further provides a humidity control apparatus, including:

the detection module is used for detecting the current temperature and the current dew point temperature of the circulating air;

the judging module is used for judging whether the current temperature of the circulating air is within a set dew point temperature control range or not;

the control module is used for controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air according to the current temperature and the current dew point temperature of the circulating air if the current temperature of the circulating air is determined to be within the set dew point temperature control range according to the judgment result of the judgment module, so that the dew point temperature of the processed circulating air is not lower than the set lowest dew point temperature value and not higher than the set highest dew point temperature value, and the relative humidity of the processed circulating air is not higher than the set highest relative humidity value;

Optionally, the control module is specifically configured to:

if the current temperature of the circulating air is determined to be within a set dew point temperature control range according to the judgment result of the judgment module, and if the non-condensation dew point temperature is determined to be not lower than the set dew point temperature lowest value and not higher than the set dew point temperature highest value, the following operations are executed:

Further, the control module is specifically configured to:

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, the current relative humidity of the circulating air is not higher than the set highest relative humidity value, and the current temperature of the circulating air is determined to be not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, whether the set ideal dew point temperature needs to be referred or not during humidity control is judged;

Optionally, the control module is specifically configured to:

and if the current temperature of the circulating air is determined to be within the set dew point temperature control range according to the judgment result of the judgment module, and if the non-condensation dew point temperature is determined to be lower than the set lowest dew point temperature value, the unit is controlled to humidify by taking the lowest dew point temperature value as a target until the dew point temperature of the processed circulating air is not lower than the lowest dew point temperature value.

Optionally, the control module is specifically configured to:

if the current temperature of the circulating air is determined to be within the set dew point temperature control range according to the judgment result of the judgment module, and if the non-condensation dew point temperature is determined to be higher than the set dew point temperature maximum value, the following operations are executed:

Further, the control module is specifically configured to:

Further, the control module is further configured to control the unit not to humidify and not to dehumidify if it is determined that the current temperature of the circulating air is outside the set dew point temperature control range according to the determination result of the determination module.

The invention has the following beneficial effects:

the embodiment of the invention provides a humidity control method and a humidity control device, which comprises the steps of firstly detecting the current temperature and the current dew point temperature of circulating air; judging whether the current temperature of the circulating air is within a set dew point temperature control range or not; if so, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air, so that the dew point temperature of the processed circulating air is not lower than the set lowest dew point temperature value and not higher than the set highest dew point temperature value, and the relative humidity of the processed circulating air is not higher than the set highest relative humidity value. That is to say, the scheme provided by this embodiment can control the humidity by using the dew point temperature according to the physical properties of the air, and avoids the influence of the temperature on the relative humidity, thereby avoiding the occurrence of the condition that the air conditioner dehumidifies and humidifies at the same time to the greatest extent, and achieving the effects of energy saving and water saving; and the possibility of temperature and humidity fluctuation of the processed air is reduced, and the reliability and the accuracy of temperature and humidity control are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.

FIG. 1 is a schematic flow chart illustrating a humidity control method according to a first embodiment of the present invention;

fig. 2 is a schematic view showing the air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 3 is a schematic diagram showing an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 4 is a schematic diagram showing an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 5 is a schematic diagram showing the air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 6 is a schematic diagram showing an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 7 is a schematic diagram six of an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 8 is a schematic diagram seven of an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 9 is a schematic view eight of an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 10 is a schematic view nine of an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 11 is a schematic diagram ten showing an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 12 is an eleventh schematic view illustrating an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 13 is a diagram twelve illustrating an air psychrometric chart of the machine room according to the first embodiment of the present invention;

fig. 14 is a schematic structural diagram of a humidity control apparatus according to a second embodiment of the present invention.

Detailed Description

In order to solve the problems of low reliability and accuracy and waste of resources such as electricity and water when the temperature and humidity of a machine room are controlled according to a conventional temperature-humidity control logic, an embodiment of the present invention provides a new humidity control method and device based on the conventional temperature control logic (i.e., a target temperature and an allowable deviation are set, and a state of refrigeration output of an air conditioning unit is controlled after calculation is performed by a pre-edited control algorithm according to a detected temperature, so as to ensure that the temperature of circulating air is within a range of the set target temperature and the allowable deviation), and the humidity control method may include:

detecting the current temperature and the current dew point temperature of the circulating air; judging whether the current temperature of the circulating air is within a set dew point temperature control range or not; if so, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air according to the current temperature and the current dew point temperature of the circulating air, so that the dew point temperature of the processed circulating air is not lower than the set lowest dew point temperature value and not higher than the set highest dew point temperature value, and the relative humidity of the processed circulating air is not higher than the set highest relative humidity value.

That is to say, the scheme provided by this embodiment can control the humidity by using the dew point temperature according to the physical properties of the air, and avoids the influence of the temperature on the relative humidity, thereby avoiding the occurrence of the condition that the air conditioner dehumidifies and humidifies at the same time to the greatest extent, and achieving the effects of energy saving and water saving; and the possibility of temperature and humidity fluctuation of the processed air is reduced, and the reliability and the accuracy of temperature and humidity control are improved.

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

an embodiment of the present invention provides a humidity control method, and specifically, as shown in fig. 1, it is a schematic flow chart of the humidity control method in the embodiment of the present invention, where the method includes:

step 101: the current temperature and the current dew point temperature of the circulated air are detected.

Alternatively, a temperature sensor or a temperature and humidity sensor may be used to detect the current temperature of the circulating air.

In addition, it should be noted that, because the current dew point temperature of the circulating air cannot be directly detected by the sensor, and the value of the current dew point temperature is related to the temperature and the relative humidity of the circulating air, the current temperature of the circulating air can be detected by the temperature sensor or the temperature and humidity sensor, and the current relative humidity of the circulating air can be detected by the humidity sensor or the temperature and humidity sensor, and the current dew point temperature of the circulating air is obtained through calculation, which is not described herein again.

Step 102: and judging whether the current temperature of the circulating air is within a set dew point temperature control range.

It should be noted that the low temperature alarm value and the high temperature alarm value may be set according to actual requirements or related standards such as national standard GB50174-2008 and american ASHRAE standard before performing humidity control, so that the dew point temperature control range may be set according to the set low temperature alarm value and the set high temperature alarm value.

For example, a first boundary of the dew point temperature control range may be set equal to a set over temperature alarm value, and a second boundary of the dew point temperature control range may be set equal to a set over temperature alarm value, and if it is detected that the current temperature of the circulating air is higher than the over temperature alarm value or lower than the over temperature alarm value, the current temperature of the circulating air is considered to be outside the set dew point temperature control range; and if the current temperature of the circulating air is detected to be not higher than the over-temperature alarm value and not lower than the over-temperature alarm value, the current temperature of the circulating air is considered to be within the set dew point temperature control range.

For another example, the first boundary of the dew point temperature control range may be set to be lower than the set temperature too low alarm value, preferably, the first boundary of the dew point temperature control range is set to tend to minus infinity; and the second boundary of the dew point temperature control range is higher than the set over temperature alarm value, preferably, the second boundary of the dew point temperature control range tends to be positive infinity, and then, no matter what the current temperature of the circulating air is detected, the current temperature of the circulating air can be considered to be within the set dew point temperature control range.

It should be noted that, the dew point temperature control range may also not be set according to the set over-temperature alarm value and the set over-temperature alarm value, that is, the first boundary and the second boundary of the dew point temperature control range may be set to any temperature value according to the actual requirement, which is not limited herein in the embodiments of the present invention.

Step 103: if the current temperature of the circulating air is determined to be within the set dew point temperature control range, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air according to the current temperature and the current dew point temperature of the circulating air, so that the dew point temperature of the processed circulating air is not lower than the set dew point temperature lowest value and not higher than the set dew point temperature highest value, and the relative humidity of the processed circulating air is not higher than the set relative humidity highest value; wherein the set dew point temperature minimum value is not higher than the set dew point temperature maximum value.

The minimum dew point temperature value, the maximum dew point temperature value and the maximum relative humidity value can be set according to environmental requirements or by referring to relevant standards such as national standard GB50174-2008 and American ASHRAE standard before humidity control, so that the dew point temperature of the circulating air is adjusted by taking the minimum dew point temperature value, the maximum dew point temperature value and the maximum relative humidity value as references, and is always controlled within a reasonable range, and the environment always has a stable moisture content.

That is to say, in the scheme provided in this embodiment, on the basis of conventional temperature control, the dew point temperature is adopted to control the humidity according to the physical properties of the air, so as to avoid the influence of the temperature on the relative humidity, thereby maximally avoiding the occurrence of the condition that the air conditioner dehumidifies and humidifies at the same time, and achieving the effects of energy saving and water saving; and the possibility of temperature and humidity fluctuation of the processed air is reduced, and the reliability and the accuracy of temperature and humidity control are improved.

if it is determined that the current dew point temperature of the circulating air is not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, the current relative humidity of the circulating air is not higher than the set highest relative humidity value, and the current temperature of the circulating air is not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, an energy-saving mode (a control mode that a humidifier does not humidify all the time under a certain condition of a machine room air conditioner) can be selected because the current dew point temperature of the circulating air and the current temperature of the circulating air are in a reasonable range at the moment, that is, the unit can be controlled not to humidify; or the control unit humidifies by taking the dew point temperature without condensation or the set ideal dew point temperature as a target, or the control unit dehumidifies and humidifies by taking the set relative humidity target value as a target; wherein the set ideal dew point temperature is higher than the lowest dew point temperature value and lower than the highest dew point temperature value;

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, and the current temperature of the circulating air is higher than the overhigh temperature alarm value or the current temperature of the circulating air is lower than the overlow temperature alarm value, the current dew point temperature of the circulating air is in a reasonable range at the moment, but the current temperature of the circulating air is overhigh or overlow, if the unit is humidified or dehumidified, the temperature control is not facilitated, namely the environment temperature is not facilitated to rapidly drop back or rise back to the reasonable range, and therefore the unit can be controlled not to be humidified and not to be dehumidified; in addition, at the moment, the unit can also be controlled to cool or heat so as to accelerate the ambient temperature to fall back or rise back to be within a reasonable range.

It should be noted that the dew point temperature of the non-condensation is related to (usually equal to) the surface temperature of the heat exchanger (i.e. the heat exchanger), and changes along with the change of the surface temperature of the heat exchanger, and is determined by objective factors such as water temperature, etc., and is an uncontrollable parameter, which is not described herein again.

In addition, the heat exchanger surface temperature may be any temperature value that can represent the heat exchanger surface temperature, such as the heat exchanger inlet temperature, the heat exchanger minimum temperature, or the heat exchanger intermediate temperature; the set target value of the relative humidity and the ideal dew point temperature may be set according to actual requirements or by referring to relevant standards such as national standard GB50174-2008 and american ASHRAE standard, which are not described herein again.

Further, when it is determined that the dew point temperature of no condensation is not lower than the set dew point temperature minimum and not higher than the set dew point temperature maximum, if it is determined that the current dew point temperature of the circulating air is not lower than the dew point temperature minimum and not higher than the dew point temperature maximum and the current relative humidity of the circulating air is not higher than the set relative humidity maximum and the current temperature of the circulating air is not lower than the over temperature alarm and not higher than the over temperature alarm, the unit is controlled not to humidify, or the unit is controlled to humidify with the dew point temperature of no condensation or the set ideal dew point temperature as a target, or the unit is controlled to dehumidify and humidify with the set relative humidity target value as a target, including:

step 1: judging whether a set ideal dew point temperature needs to be referred or not when humidity control is carried out, wherein the set ideal dew point temperature is higher than the lowest dew point temperature value and lower than the highest dew point temperature value;

step 2: if the set ideal dew point temperature needs to be referred to, the following operations are executed:

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature and not higher than the ideal dew point temperature, and the non-condensation dew point temperature is determined to be not higher than the ideal dew point temperature, the unit is controlled not to be humidified, or the unit is controlled to be humidified by taking the non-condensation dew point temperature as a target, and the processed dew point temperature of the circulating air is not higher than the non-condensation dew point temperature (if the current dew point temperature of the circulating air is higher than the non-condensation dew point temperature and lower than the ideal dew point temperature at the moment, the unit automatically dehumidifies due to the inherent working principle of the air conditioner to be uncontrollable, but finally the dew point temperature of the circulating air after dehumidification is also higher than the non-condensation dew point temperature); namely, at the moment, the unit can be controlled not to be humidified, or the unit can be controlled to be humidified by taking the dew point temperature without condensation as a target, and the dew point temperature can be selected;

or if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the ideal dew point temperature, and the non-condensation dew point temperature is higher than the ideal dew point temperature, the unit is controlled not to be humidified, or the unit is controlled to be humidified by taking the ideal dew point temperature as a target, and the dew point temperature of the processed circulating air is not higher than the non-condensation dew point temperature; namely, at the moment, the unit can be controlled not to be humidified, or the unit can be controlled to be humidified by taking the ideal dew point temperature as a target, and the two can be selected;

or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the maximum dew point temperature and the non-condensation dew point temperature is determined to be not higher than the ideal dew point temperature, the unit is controlled not to be humidified, or the unit automatically dehumidifies the circulating air because the current dew point temperature of the circulating air is higher than the non-condensation dew point temperature, and in order to prevent the dew point temperature of the circulating air after dehumidification from being too low, the unit can be controlled to dehumidify and humidify by taking a set relative humidity target value (which can be flexibly set according to actual conditions) as a target, so that the processed circulating air dew point temperature is close to the ideal dew point temperature, or the relative humidity is close to the relative humidity target value; that is, at this time, the unit can be controlled not to humidify, and the unit can be controlled to perform dehumidification and humidification with the set target value of relative humidity as a target, or the unit can be controlled to perform dehumidification and humidification with the target value of relative humidity as a target;

or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the maximum dew point temperature and the non-condensation dew point temperature is determined to be higher than the ideal dew point temperature, the unit is controlled not to be humidified, or the unit is controlled to dehumidify by taking the ideal dew point temperature as a target and the processed dew point temperature of the circulating air is not higher than the non-condensation dew point temperature (if the current dew point temperature of the circulating air is higher than the non-condensation dew point temperature at the moment, the unit dehumidifies by itself due to the inherent working principle of the air conditioner and is uncontrollable, but finally the dew point temperature of the circulating air after dehumidification is not higher than the non-condensation dew point temperature); in this case, the unit may be controlled to perform dehumidification and humidification with the set target value of relative humidity as a target so that the relative humidity of the treated circulating air approaches the target value of relative humidity; that is, at this time, the unit may be controlled not to humidify, or may be controlled to dehumidify with the ideal dew point temperature as a target, or may be controlled to dehumidify and humidify with a set target value of relative humidity as a target, or may be selected from the three;

if the set ideal dew point temperature does not need to be referred to, the following operations are carried out:

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the dew point temperature without condensation, the unit does not humidify, or the unit is controlled and controlled to humidify by taking the dew point temperature without condensation as a target, and the dew point temperature of the treated circulating air is not higher than the dew point temperature without condensation; namely, at the moment, the unit can be controlled not to be humidified, and the unit can be controlled to perform dehumidification by taking the dew point temperature without condensation as a target, wherein the dew point temperature is selected from the dew point temperature and the dew point temperature;

or if the current dew point temperature of the circulating air is determined to be higher than the dew point temperature without condensation and not higher than the maximum dew point temperature, the unit dehumidifies automatically and can control the unit not to humidify; or in order to prevent the dew point temperature of the dehumidified circulating air from being too low, the unit can be controlled to dehumidify and humidify by taking a set relative humidity target value as a target; in this case, the unit may be controlled not to humidify, or the unit may be controlled to perform dehumidification and humidification with the set target value of relative humidity as a target, or both may be controlled.

The ideal dew point temperature and the relative humidity target value can be set according to actual requirements before humidity control, so that when the current temperature and humidity of the circulating air are within a reasonable range (the dew point temperature is not lower than the dew point temperature lowest value and is not higher than the dew point temperature highest value, and the temperature is not lower than the temperature too-low alarm value and is not higher than the temperature too-high alarm value), whether humidity control needs to be carried out by referring to the ideal dew point temperature can be judged, if needed, the dew point temperature of the circulating air can be controlled to be as close to the ideal dew point temperature as possible or the relative humidity is as close to the relative humidity target value as possible, namely, on the basis of controlling the environment humidity within a reasonable range, the environment humidity is controlled to be on the ideal humidity as possible, and the accuracy of environment temperature and humidity control is.

It should be noted that, at this time, the dew point temperature of the non-condensation is lower than the set minimum dew point temperature, and even if the dew point temperature of the circulating air is adjusted to be within a reasonable range (i.e., not lower than the minimum dew point temperature and not higher than the maximum dew point temperature), since the dew point temperature of the circulating air is higher than the dew point temperature of the non-condensation, the unit will perform self-dehumidification with the dew point temperature of the non-condensation as a target, that is, the unit is in a high-energy consumption operation state by performing humidification and dehumidification at this time. In addition, at this time, the unit may alarm to inform the corresponding operator.

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, the current relative humidity of the circulating air is not higher than the set highest relative humidity value, and the current temperature of the circulating air is not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, an energy-saving mode can be selected because the current dew point temperature of the circulating air and the current temperature of the circulating air are in reasonable ranges at the moment, namely, the unit can be controlled not to be humidified; or, the control unit humidifies by taking the set ideal dew point temperature as a target, or the control unit dehumidifies and humidifies by taking the set relative humidity target value as a target; wherein the set ideal dew point temperature is higher than the lowest dew point temperature value and lower than the highest dew point temperature value;

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, and the current temperature of the circulating air is higher than the overhigh temperature alarm value or the current temperature of the circulating air is lower than the overlow temperature alarm value, the current dew point temperature of the circulating air is in a reasonable range at the moment, but the current temperature of the circulating air is overhigh or overlow, if the unit is humidified or dehumidified, the temperature control is not facilitated, namely the environment temperature is not facilitated to be rapidly reduced or increased to be in the reasonable range, and therefore the unit can be controlled not to be humidified and not to be dehumidified; in addition, at the moment, the unit can also be controlled to refrigerate or heat at the same time, so that the ambient temperature is accelerated to fall back or rise back to be within a reasonable range.

Further, when it is determined that the dew point temperature without condensation is higher than the set dew point temperature maximum value, if it is determined that the current dew point temperature of the circulating air is not lower than the dew point temperature minimum value and not higher than the dew point temperature maximum value, and the current relative humidity of the circulating air is not higher than the set relative humidity maximum value, and the current temperature of the circulating air is not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, the unit is controlled not to humidify; or, the control unit uses the set ideal dew point temperature as the target to humidify, or the control unit uses the set relative humidity target value as the target to dehumidify and humidify, comprising:

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the ideal dew point temperature, controlling the unit not to humidify or controlling the unit to humidify by taking the ideal dew point temperature as a target; namely, at the moment, the unit can be controlled not to be humidified, and the unit can be controlled to dehumidify by taking the ideal dew point temperature as a target, wherein the ideal dew point temperature can be selected from the two;

or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the dew point temperature maximum value, controlling the unit not to humidify, or controlling the unit to dehumidify and humidify by taking a set relative humidity target value as a target, and ensuring that the dew point temperature of the processed circulating air is not higher than the dew point temperature maximum value and the relative humidity is not higher than the set relative humidity maximum value; that is, at this time, the unit can be controlled not to humidify, and the unit can be controlled to perform dehumidification and humidification with the set target value of relative humidity as a target, or the unit can be controlled to perform dehumidification and humidification with the target value of relative humidity as a target;

if the set ideal dew point temperature does not need to be referenced, then,

and controlling the unit not to humidify, or controlling the unit to dehumidify and humidify by taking a set relative humidity target value as a target, and ensuring that the dew point temperature of the processed circulating air is not higher than the dew point temperature maximum value and the relative humidity is not higher than the set relative humidity maximum value. In this case, the unit may be controlled not to humidify, or the unit may be controlled to perform dehumidification and humidification with the set target value of relative humidity as a target, or both may be controlled.

Further, the method further comprises:

and if the current temperature of the circulating air is determined to be out of the set dew point temperature control range, controlling the unit not to humidify and dehumidify.

It should be noted that, the current temperature of the circulating air is outside the set dew point temperature control range, which indicates that the current ambient temperature may be abnormal, and at this time, humidification or dehumidification is performed, which is not beneficial to rapidly lowering or raising the ambient temperature to a reasonable range, so that the unit needs to be controlled not to humidify and not to dehumidify. In addition, in this case, the unit cooling or heating may be controlled simultaneously.

For example, when a first boundary of the dew point temperature control range is set to be equal to a set over-temperature alarm value, and a second boundary of the dew point temperature control range is set to be equal to a set over-temperature alarm value, if the current temperature of the circulating air is higher than the second boundary, namely higher than the over-temperature alarm value, the ambient temperature is over-high, and if the unit is controlled to humidify or dehumidify under the condition, the unit is not favorable for refrigerating; in addition, in the occasion of no humidity production such as a machine room, when the ambient temperature is too high, the relative humidity is not too high generally, namely, the dehumidification is not needed, therefore, in this case, the unit can be controlled not to be humidified and not to be dehumidified, and the unit is controlled to refrigerate 100 percent, so that the ambient temperature is rapidly reduced to be below the alarm value of the too high temperature.

The humidity control method provided by the embodiment can control the humidity by adopting the dew point temperature according to the physical properties of the air, avoids the influence of the temperature on the relative humidity, adopts range control, comprehensively refers to the dew point temperature without condensation, the ideal dew point temperature, the relative humidity target value and the like, can stably control the dew point temperature of the circulating air within a reasonable range, even on the ideal dew point temperature value, ensures the moisture content of the environment to be stable, further avoids the condition that the air conditioner dehumidifies and humidifies at the same time, realizes the effects of energy saving and water saving, reduces the temperature and humidity fluctuation of the air, and improves the reliability and accuracy of the temperature and humidity control.

The following will specifically describe the specific working mode of the humidity control method provided by the embodiment of the present invention by taking the example of controlling the temperature and humidity of the machine room on the basis of the conventional temperature control logic:

example one:

supposing that before the temperature and humidity of the machine room are controlled, a dew point temperature minimum value, a dew point temperature maximum value, a relative humidity maximum value, an ideal dew point temperature, a relative humidity target value, a too low temperature alarm value and a too high temperature alarm value are set; wherein, the lowest dew point temperature value is less than the ideal dew point temperature value is less than the highest dew point temperature value, the target value of relative humidity is less than the highest relative humidity value, and the over-low temperature alarm value is less than the over-high temperature alarm value; setting a first boundary of a dew point temperature control range to be infinitely lower than the over-low temperature alarm value, and setting a second boundary to be infinitely higher than the over-high temperature alarm value; and when the temperature and humidity control is carried out, the ideal dew point temperature needs to be referred, and then the control process is as follows:

step 1: detecting the current temperature and the current dew point temperature of the circulating air;

step 2: judging whether the detected current temperature of the circulating air is within a set dew point temperature control range, if so, executing the step 3; otherwise, executing step 4; since the set dew point temperature control range is infinite, no matter what the current temperature of the circulating air is, the set dew point temperature control range is always within the dew point temperature control range, the step 3 can also be directly executed;

and step 3: detecting a dew point temperature without condensation (a heat exchanger surface temperature), and performing the following operations according to the detected dew point temperature without condensation:

if the detected non-condensation dew point temperature is determined to be not lower than the set dew point temperature minimum value and not higher than the set dew point temperature maximum value (in this case, the corresponding psychrometric chart can be shown in fig. 2), the following operations are executed:

1. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature exceeds the over-temperature alarm value, as shown in the area 1 in fig. 2, at the moment, because the humidity of the machine room is too low, the machine set can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and the machine room is ensured to have certain moisture content;

2. if the current dew point temperature of the circulating air is determined to be higher than the lowest dew point temperature value and the temperature exceeds the overhigh alarm value, as shown in the area 2 in fig. 2, at the moment, because the current dew point temperature of the circulating air of the machine room is within a reasonable range or is higher, if the humidifier is used for humidifying, the machine room is not favorable for rapidly cooling, and therefore the machine set can be controlled not to humidify and not to dehumidify; meanwhile, the unit can be controlled to carry out 100% refrigeration operation, so that the temperature of the machine room can be quickly reduced to a reasonable range;

3. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature is in a reasonable range, as shown in an area 3 in fig. 2, then the humidity of the machine room is too low, so that the unit can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and a certain moisture content of the machine room is ensured;

4. if it is determined that the current dew point temperature of the circulating air is higher than the dew point temperature minimum value and lower than the set ideal dew point temperature value, and the relative humidity of the circulating air is lower than the relative humidity maximum value, and the temperature is within the reasonable range, as shown in the area 4 of fig. 2, then:

because the dew point temperature of the circulating air is in a reasonable range and the humidity of the circulating air is in a reasonable range, the unit can be controlled not to be humidified; or,

when the dew point temperature of the non-condensation is determined to be lower than the ideal dew point temperature, the unit is controlled to humidify by taking the dew point temperature of the non-condensation as a target, but the dew point temperature of the processed circulating air is not higher than the dew point temperature of the non-condensation (if the current dew point temperature of the circulating air is higher than the dew point temperature of the non-condensation and lower than the ideal dew point temperature at the moment, the unit dehumidifies the circulating air automatically to be uncontrollable due to the inherent working principle of the air conditioner, but the dew point temperature of the dehumidified circulating air is not higher than the dew point temperature of the non-condensation); or,

when the dew point temperature without condensation is determined to be higher than the ideal dew point temperature, the unit can be controlled to humidify by taking the ideal dew point temperature as a target, but the dew point temperature of the treated circulating air is ensured not to be higher than the dew point temperature without condensation;

5. if it is determined that the current dew point temperature of the circulating air is higher than the ideal dew point temperature and not higher than the dew point temperature maximum, while the relative humidity is lower than the "relative humidity maximum", and the temperature is within a reasonable range, as shown in area 5 of fig. 2, then:

because the humidity of the circulating air is in a reasonable range, the unit can be controlled not to be humidified; or,

if the dew point temperature without condensation is detected to be not higher than the ideal dew point temperature, the unit automatically dehumidifies because the current dew point temperature of the circulating air is higher than the dew point temperature without condensation, and in order to prevent the dew point temperature of the circulating air after dehumidification from being too low, the unit can be controlled to dehumidify and humidify by taking a set relative humidity target value as a target, so that the dew point temperature of the circulating air after treatment is close to the ideal dew point temperature, or the relative humidity is close to the relative humidity target value; or,

if the dew point temperature of the non-condensation is detected to be higher than the ideal dew point temperature, the unit can be controlled to dehumidify by taking the ideal dew point temperature as a target, and the dew point temperature of the processed circulating air is not higher than the dew point temperature of the non-condensation (if the current dew point temperature of the circulating air is higher than the dew point temperature of the non-condensation and higher than the ideal dew point temperature, the unit can automatically dehumidify due to the inherent working principle of the air conditioner and is uncontrollable, but finally the dew point temperature of the dehumidified circulating air is not higher than the dew point temperature of the non-condensation); in this case, the unit may be controlled to perform dehumidification and humidification with the set target value of relative humidity as a target so that the relative humidity of the treated circulating air approaches the target value of relative humidity;

6. if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value and the temperature is in a reasonable range, as shown in an area 6 in fig. 2, the unit is controlled not to be humidified, and the unit is controlled to dehumidify by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the maximum relative humidity value;

7. if the current dew point temperature of the circulating air is lower than the dew point temperature minimum value and the temperature is lower than the temperature too low alarm value, as shown in an area 7 in fig. 2, the humidity of the machine room is too low, the unit can be controlled to humidify by taking the dew point temperature minimum value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the dew point temperature minimum value, and the machine room is ensured to have a certain moisture content;

8. if the current dew point temperature of the circulating air is determined to be higher than the lowest dew point temperature value and the temperature is lower than the over-low temperature alarm value, as shown in the area 8 in fig. 2, at this time, because the current dew point temperature of the circulating air in the machine room is within a reasonable range or is higher, if the humidifier is used for humidification, the machine room is not favorable for rapidly heating up, and therefore, the unit can be controlled not to be humidified and not to be dehumidified at this time; in addition, the unit can be controlled to perform 100% heating operation simultaneously, so that the temperature of the machine room can be quickly increased to a reasonable range;

secondly, if the detected non-condensation dew point temperature is lower than the set dew point temperature minimum value (at this time, the corresponding psychrometric chart can be shown in fig. 3), the unit can be controlled to humidify by taking the dew point temperature minimum value as a target until the dew point temperature of the treated circulating air is not lower than the dew point temperature minimum value; in addition, because the dew point temperature of the circulating air is higher than the dew point temperature without condensation, the unit can automatically dehumidify by taking the dew point temperature without condensation as a target, namely the unit is in a high-energy consumption running state by humidifying and dehumidifying at the moment, so that the unit can give an alarm to inform corresponding operators;

thirdly, if the detected dew point temperature without condensation is determined to be higher than the set dew point temperature maximum value (in this case, the corresponding psychrometric chart can be shown in fig. 4), the following operations are executed:

1. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature exceeds the over-temperature alarm value, as shown in the area 1 in fig. 4, then at the moment, because the humidity of the machine room is too low, the machine set can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and the machine room is ensured to have certain moisture content;

2. if the current dew point temperature of the circulating air is determined to be higher than the lowest dew point temperature value and the temperature exceeds the overhigh alarm value, as shown in the area 2 in fig. 4, at the moment, because the current dew point temperature of the circulating air of the machine room is within a reasonable range or is higher, if the humidifier is used for humidifying, the machine room is not favorable for rapidly cooling, and therefore the machine set can be controlled not to humidify and not to dehumidify; meanwhile, the unit can be controlled to carry out 100% refrigeration operation, so that the temperature of the machine room can be quickly reduced to a reasonable range;

3. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature is in a reasonable range, as shown in the area 3 in fig. 4, then the humidity of the machine room is too low, so that the unit can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and a certain moisture content of the machine room is ensured;

4. if the current dew point temperature of the circulating air is determined to be higher than the minimum dew point temperature value and lower than the set ideal dew point temperature value, and the temperature is in a reasonable range, as shown in the area 4 of fig. 4, the unit can be controlled not to be humidified, or the unit can be controlled to be humidified by taking the ideal dew point temperature as a target;

5. if it is determined that the current dew point temperature of the circulating air is higher than the ideal dew point temperature and not higher than the dew point temperature maximum value, and the relative humidity of the circulating air is lower than the relative humidity maximum value, and the temperature is within a reasonable range, as shown in area 5 of fig. 4, the unit can be controlled not to be humidified, or the unit can be controlled to perform dehumidification and humidification with the set relative humidity target value as a target, and the dew point temperature of the processed circulating air is ensured not to be higher than the dew point temperature maximum value, and the relative humidity is ensured not to be higher than the set relative humidity maximum value;

6. if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value and the temperature is in a reasonable range, as shown in an area 6 in fig. 4, the unit is controlled not to be humidified, and the unit is controlled to dehumidify by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the set maximum relative humidity value;

7. if the current dew point temperature of the circulating air is lower than the dew point temperature minimum value and the temperature is lower than the temperature too low alarm value, as shown in the area 7 of fig. 4, the humidity of the machine room is too low, the unit is controlled to humidify by taking the dew point temperature minimum value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the dew point temperature minimum value, and the machine room is ensured to have a certain moisture content;

8. if the current dew point temperature of the circulating air is determined to be higher than the lowest dew point temperature value and the temperature is lower than the over-low temperature alarm value, as shown in the area 8 in fig. 4, the current dew point temperature of the circulating air in the machine room is in a reasonable range or is higher, if the humidifier is humidified, the machine room is not favorable for rapidly heating, and at the moment, the unit can be controlled not to be humidified and not to be dehumidified; in addition, the control unit can be controlled to carry out 100% heating operation so as to be beneficial to quickly raising the temperature of the machine room to a reasonable range;

and 4, step 4: the control unit does not humidify and does not dehumidify.

This example is applicable in computer lab air conditioner control process, has consulted ideal dew point temperature, and although control logic is comparatively complicated, not only can be with air humidity complete control in the humidity range of allowwing, but also can make air humidity be close to an ideal value, and temperature and humidity control's precision and degree of accuracy are higher.

In addition, it should be noted that, in the actual control process, after setting corresponding threshold values such as the lowest dew point temperature value, the highest relative humidity value, the too low temperature alarm value, and the too high temperature alarm value, if the corresponding detection value exceeds the corresponding threshold value, corresponding alarm may be performed, and details are not repeated here.

Example two:

supposing that before the temperature and humidity of the machine room are controlled, a dew point temperature minimum value, a dew point temperature maximum value, a relative humidity target value, a too low temperature alarm value and a too high temperature alarm value are set; wherein the lowest dew point temperature value is less than the highest dew point temperature value, the target relative humidity value is less than the highest relative humidity value, and the over-low temperature alarm value is less than the over-high temperature alarm value; setting a first boundary of a dew point temperature control range to be equal to the over-low temperature alarm value, and setting a second boundary to be equal to the over-high temperature alarm value; and when the temperature and humidity control is carried out, the ideal dew point temperature is not referred, and then the control process is as follows:

step 2: judging whether the detected current temperature of the circulating air is within a set dew point temperature control range, if so, executing the step 3; otherwise, executing step 4;

if the detected non-condensation dew point temperature is determined to be not lower than the set dew point temperature minimum value and not higher than the set dew point temperature maximum value (in this case, the corresponding psychrometric chart can be shown in fig. 5), the following operations are executed:

1. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature is in a reasonable range, as shown in an area 2 in fig. 5, then the humidity of the machine room is too low, so that the unit can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and a certain moisture content of the machine room is ensured;

2. if the current dew point temperature of the circulating air is determined to be higher than the minimum dew point temperature value and lower than the dew point temperature without condensation, the temperature is in a reasonable range, as shown in the area 3 in fig. 5, because the humidity of the circulating air is in the reasonable range, an energy-saving mode can be selected, and the unit is controlled not to be humidified; or the unit can be controlled to humidify by taking the dew point temperature without condensation as a target, but the dew point temperature of the treated circulating air is ensured not to be higher than the dew point temperature without condensation;

3. if the current dew point temperature of the circulating air is determined to be higher than the dew point temperature without condensation and not higher than the maximum dew point temperature, and meanwhile, the relative humidity is lower than the maximum relative humidity and the temperature is in a reasonable range, as shown in an area 4 in fig. 5, the unit can be controlled not to be humidified; or, because the current dew point temperature of the circulating air is higher than the dew point temperature without condensation, the unit can automatically dehumidify, and in order to prevent the dew point temperature of the circulating air after dehumidification from being too low, the unit can be controlled to dehumidify and humidify by taking the set relative humidity target value as a target so that the relative humidity of the circulating air after treatment is close to the relative humidity target value;

4. if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value and the temperature is in a reasonable range, as shown in an area 5 in fig. 5, the unit is controlled not to be humidified, and the unit is controlled to dehumidify by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the maximum relative humidity value;

if the detected non-condensation dew point temperature is determined to be lower than the set dew point temperature minimum value (in this case, the corresponding psychrometric chart can be shown in fig. 6), the following operations can be executed:

if the current temperature of the circulating air is determined to be not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, as shown in the area 2 of fig. 6, the unit can be controlled to humidify by taking the lowest dew point temperature as a target until the dew point temperature of the processed circulating air is not lower than the lowest dew point temperature; in addition, because the dew point temperature of the circulating air is higher than the dew point temperature without condensation, the unit can automatically dehumidify by taking the dew point temperature without condensation as a target, namely the unit is in a high-energy consumption running state by humidifying and dehumidifying at the moment, so that the unit can give an alarm to inform corresponding operators;

thirdly, if the detected dew point temperature without condensation is determined to be higher than the set dew point temperature maximum value (in this case, the corresponding psychrometric chart can be shown in fig. 7), the following operations are executed:

1. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature is in a reasonable range, as shown in an area 2 in fig. 7, then the humidity of the machine room is too low, so that the unit can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and a certain moisture content of the machine room is ensured;

2. if it is determined that the current dew point temperature of the circulating air is not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, and meanwhile, the relative humidity is lower than the highest relative humidity value, and the temperature is within a reasonable range, as shown in an area 3 in fig. 7, at this time, because the temperature and the humidity of the circulating air are within the reasonable range, an energy-saving mode can be selected, and the unit is controlled not to be humidified; or the unit can be controlled to perform dehumidification and humidification by taking a set relative humidity target value as a target, but the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the maximum relative humidity value;

3. if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value and the temperature is in a reasonable range, as shown in an area 4 in fig. 7, the unit is controlled not to be humidified, and the unit is controlled to dehumidify by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the maximum relative humidity value;

and 4, step 4:

1. if the current temperature of the circulating air is determined to be higher than the over-temperature alarm value, as shown in the area 1 in fig. 5, the area 1 in fig. 6 and the area 1 in fig. 7, the temperature environment of the machine room is abnormal at this time, so that the humidity does not need to be controlled, the humidifier does not humidify, and the unit can be controlled to perform 100% refrigeration operation, so that the temperature of the machine room can be quickly reduced back to a reasonable range;

2. if it is determined that the current temperature of the circulating air is lower than the over-temperature alarm value, as shown in the area 6 of fig. 5, the area 3 of fig. 6, and the area 5 of fig. 7, the temperature environment of the machine room is abnormal, so that the humidity does not need to be controlled, the humidifier does not humidify, and the unit can be controlled to perform 100% heating operation, so that the temperature of the machine room can be quickly raised to a reasonable range.

This example is applicable to the control process of the air conditioner in the machine room, the ideal dew point temperature value is cancelled, and the control range of the dew point temperature is reduced, the advantage is that the control logic is simple, the disadvantage is that the humidity control is completely targeted to the allowable humidity range, and the processed dew point temperature of the circulating air is a random value in the allowable humidity range.

Example three:

supposing that before the temperature and humidity of the machine room are controlled, a dew point temperature minimum value, a dew point temperature maximum value, a relative humidity target value, a too low temperature alarm value and a too high temperature alarm value are set; wherein the lowest dew point temperature value is less than the highest dew point temperature value, the target relative humidity value is less than the highest relative humidity value, and the over-low temperature alarm value is less than the over-high temperature alarm value; setting a first boundary of a dew point temperature control range to be infinitely lower than the over-low temperature alarm value, and setting a second boundary to be infinitely higher than the over-high temperature alarm value; and when the temperature and humidity control is carried out, the ideal dew point temperature is not referred, and then the control process is as follows:

if the detected non-condensation dew point temperature is determined to be not lower than the set dew point temperature minimum value and not higher than the set dew point temperature maximum value (in this case, the corresponding psychrometric chart can be shown in fig. 8), the following operations are executed:

1. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature exceeds the over-temperature alarm value, as shown in the area 1 of fig. 8, then at the moment, because the humidity of the machine room is too low, the machine set can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and the machine room is ensured to have certain moisture content;

2. if the current dew point temperature of the circulating air is determined to be higher than the lowest dew point temperature value and the temperature exceeds the overhigh alarm value, as shown in the area 2 in fig. 8, at the moment, because the current dew point temperature of the circulating air of the machine room is within a reasonable range or is higher, if the humidifier is used for humidifying, the machine room is not favorable for rapidly cooling, and therefore the machine set can be controlled not to humidify and not to dehumidify; meanwhile, the unit can be controlled to carry out 100% refrigeration operation, so that the temperature of the machine room can be quickly reduced to a reasonable range;

3. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature is in a reasonable range, as shown in the area 3 of fig. 8, then at this time, because the humidity of the machine room is too low, the unit can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and the machine room is ensured to have a certain moisture content;

4. if the current dew point temperature of the circulating air is determined to be higher than the minimum dew point temperature value and lower than the dew point temperature without condensation, the temperature is within a reasonable range, as shown in a region 4 in fig. 8, at the moment, because the humidity of the circulating air is within the reasonable range, an energy-saving mode can be selected, and the unit is controlled not to be humidified; or the unit can be controlled to humidify by taking the dew point temperature without condensation as a target, but the dew point temperature of the treated circulating air is ensured not to be higher than the dew point temperature without condensation;

5. if the current dew point temperature of the circulating air is determined to be higher than the dew point temperature without condensation and not higher than the maximum dew point temperature, and meanwhile, the relative humidity is lower than the maximum relative humidity and the temperature is in a reasonable range, as shown in an area 5 in fig. 8, the unit can be controlled not to be humidified; or, because the current dew point temperature of the circulating air is higher than the dew point temperature without condensation, the unit can automatically dehumidify, and in order to prevent the dew point temperature of the circulating air after dehumidification from being too low, the unit can be controlled to dehumidify and humidify by taking the set relative humidity target value as a target so that the relative humidity of the circulating air after treatment is close to the relative humidity target value;

6. if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value and the temperature is in a reasonable range, as shown in an area 6 in fig. 8, the unit is controlled not to be humidified, and the unit is controlled to dehumidify by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the maximum relative humidity value;

7. if the current dew point temperature of the circulating air is lower than the dew point temperature minimum value and the temperature is lower than the temperature too low alarm value, as shown in the area 7 of fig. 8, the humidity of the machine room is too low, the unit can be controlled to humidify by taking the dew point temperature minimum value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the dew point temperature minimum value, and the machine room is ensured to have a certain moisture content;

8. if the current dew point temperature of the circulating air is determined to be higher than the lowest dew point temperature value and the temperature is lower than the over-low temperature alarm value, as shown in the area 8 in fig. 8, at this time, because the current dew point temperature of the circulating air in the machine room is within a reasonable range or is higher, if the humidifier is used for humidification, the machine room is not favorable for rapidly heating up, and therefore, the unit can be controlled not to be humidified and not to be dehumidified at this time; in addition, the unit can be controlled to perform 100% heating operation simultaneously, so that the temperature of the machine room can be quickly increased to a reasonable range;

secondly, if the detected non-condensation dew point temperature is lower than the set dew point temperature minimum value (at this time, the corresponding psychrometric chart can be shown in fig. 9), the unit can be controlled to humidify by taking the dew point temperature minimum value as a target until the dew point temperature of the treated circulating air is not lower than the dew point temperature minimum value; in addition, because the dew point temperature of the circulating air is higher than the dew point temperature without condensation, the unit can automatically dehumidify by taking the dew point temperature without condensation as a target, namely the unit is in a high-energy consumption running state by humidifying and dehumidifying at the moment, so that the unit can give an alarm to inform corresponding operators;

thirdly, if the detected dew point temperature without condensation is determined to be higher than the set dew point temperature maximum value (in this case, the corresponding psychrometric chart can be shown as fig. 10), the following operations are executed:

1. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature exceeds the over-temperature alarm value, as shown in the area 1 of fig. 10, then at this time, because the humidity of the machine room is too low, the machine set can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and the machine room is ensured to have a certain moisture content;

2. if the current dew point temperature of the circulating air is determined to be higher than the lowest dew point temperature value and the temperature exceeds the overhigh alarm value, as shown in the area 2 in fig. 10, at the moment, because the current dew point temperature of the circulating air of the machine room is within a reasonable range or is higher, if the humidifier is used for humidifying, the machine room is not favorable for rapidly cooling, and the machine set can be controlled not to humidify and not to dehumidify; meanwhile, the unit can be controlled to carry out 100% refrigeration operation, so that the temperature of the machine room can be quickly reduced to a reasonable range;

3. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature is in a reasonable range, as shown in the area 3 in fig. 10, then the humidity of the machine room is too low, so that the unit can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and a certain moisture content of the machine room is ensured;

4. if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the highest dew point temperature value, and meanwhile, the relative humidity is lower than the highest relative humidity value, and the temperature is in a reasonable range, as shown in a region 4 in fig. 10, the temperature and the humidity of the circulating air are in the reasonable range, so that an energy-saving mode can be selected, and the unit is controlled not to be humidified; or the unit can be controlled to perform dehumidification and humidification by taking a set relative humidity target value as a target, but the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the maximum relative humidity value;

5. if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value and the temperature is in a reasonable range, as shown in an area 5 in fig. 10, the unit is controlled not to be humidified, and the unit is controlled to dehumidify by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the set maximum relative humidity value;

6. if the current dew point temperature of the circulating air is lower than the dew point temperature minimum value and the temperature is lower than the temperature too low alarm value, as shown in the area 6 of fig. 10, because the humidity of the machine room is too low at the moment, the unit is controlled to humidify by taking the dew point temperature minimum value as a target 100% or adjust the humidification according to a set analog quantity, so that the dew point temperature of the processed circulating air is not lower than the dew point temperature minimum value, and the machine room is ensured to have a certain moisture content;

7. if the current dew point temperature of the circulating air is determined to be higher than the lowest dew point temperature value and the temperature is lower than the over-low temperature alarm value, as shown in the area 7 in fig. 10, the current dew point temperature of the circulating air in the machine room is in a reasonable range or is higher, if the humidifier is humidified, the machine room is not favorable for rapidly heating, and at the moment, the unit can be controlled not to be humidified and not to be dehumidified; in addition, the unit can be controlled to perform 100% heating operation, so that the temperature of the machine room can be quickly increased to a reasonable range;

and 4, step 4: the control unit does not humidify and does not dehumidify.

Example four:

supposing that before the temperature and humidity of the machine room are controlled, a dew point temperature minimum value, a dew point temperature maximum value, an ideal dew point temperature, a relative humidity maximum value, a relative humidity target value, a too low temperature alarm value and a too high temperature alarm value are set; wherein, the lowest dew point temperature value is less than the ideal dew point temperature value is less than the highest dew point temperature value, the target value of relative humidity is less than the highest relative humidity value, and the over-low temperature alarm value is less than the over-high temperature alarm value; setting a first boundary of a dew point temperature control range to be equal to the over-low temperature alarm value, and setting a second boundary to be equal to the over-high temperature alarm value; and when the temperature and humidity control is carried out, the control process is as follows by referring to the ideal dew point temperature:

if the detected non-condensation dew point temperature is determined to be not lower than the set dew point temperature minimum value and not higher than the set dew point temperature maximum value (in this case, the corresponding psychrometric chart can be shown in fig. 11), the following operations are executed:

1. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature is in a reasonable range, as shown in an area 2 in fig. 11, then the humidity of the machine room is too low, so that the unit can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and a certain moisture content of the machine room is ensured;

2. if it is determined that the current dew point temperature of the circulating air is higher than the dew point temperature minimum value and lower than the set ideal dew point temperature value, and the relative humidity of the circulating air is lower than the relative humidity maximum value, and the temperature is within the reasonable range, as shown in area 3 of fig. 11, then:

when the dew point temperature of the non-condensation is determined to be lower than the ideal dew point temperature, the unit is controlled to humidify by taking the dew point temperature of the non-condensation as a target, but the dew point temperature of the processed circulating air is not higher than the dew point temperature of the non-condensation (if the current dew point temperature of the circulating air is higher than the dew point temperature of the non-condensation and lower than the ideal dew point temperature at the moment, the unit dehumidifies the circulating air automatically to be uncontrollable due to the inherent working principle of the air conditioner, but the dew point temperature of the dehumidified circulating air is not higher than the dew point temperature of the non-condensation); or

3. if it is determined that the current dew point temperature of the circulating air is higher than the ideal dew point temperature and not higher than the dew point temperature maximum, while the relative humidity is lower than the "relative humidity maximum", and the temperature is within a reasonable range, as shown in fig. 11, area 4, then:

if the dew point temperature without condensation is detected to be not higher than the ideal dew point temperature, the unit automatically dehumidifies because the current dew point temperature of the circulating air is higher than the dew point temperature without condensation, and in order to prevent the dew point temperature of the circulating air after dehumidification from being too low, the unit can be controlled to dehumidify and humidify by taking the set relative humidity target value as a target, so that the dew point temperature of the circulating air after treatment is close to the ideal dew point temperature, or the relative humidity is close to the relative humidity target value; or

4. if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value and the temperature is in a reasonable range, as shown in an area 5 in fig. 11, the unit is controlled not to be humidified, and the unit is controlled to dehumidify by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the maximum relative humidity value;

if the detected non-condensation dew point temperature is determined to be lower than the set dew point temperature minimum value (in this case, the corresponding psychrometric chart can be shown as fig. 12), the following operations can be executed:

if the current temperature of the circulating air is not lower than the over-temperature alarm value and not higher than the over-temperature alarm value, as shown in area 2 of fig. 12, the unit can be controlled to humidify by taking the lowest dew point temperature as a target until the dew point temperature of the processed circulating air is not lower than the lowest dew point temperature; in addition, because the dew point temperature of the circulating air is higher than the dew point temperature without condensation, the unit can automatically dehumidify by taking the dew point temperature without condensation as a target, namely the unit is in a high-energy consumption running state by humidifying and dehumidifying at the moment, so that the unit can give an alarm to inform corresponding operators;

thirdly, if the detected dew point temperature without condensation is determined to be higher than the set dew point temperature maximum value (in this case, the corresponding psychrometric chart can be shown as fig. 13), the following operations are executed:

1. if the current dew point temperature of the circulating air is lower than the minimum dew point temperature value and the temperature is in a reasonable range, as shown in an area 2 in fig. 13, then the humidity of the machine room is too low, so that the unit can be controlled to humidify by taking the minimum dew point temperature value as a target 100% or adjust the humidification according to a set analog quantity, the dew point temperature of the processed circulating air is not lower than the minimum dew point temperature value, and a certain moisture content of the machine room is ensured;

2. if the current dew point temperature of the circulating air is determined to be higher than the minimum dew point temperature value and lower than the set ideal dew point temperature value, and the temperature is in a reasonable range, as shown in the area 3 in fig. 13, the unit can be controlled not to be humidified, or the unit can be controlled to be humidified by taking the ideal dew point temperature as a target;

3. if it is determined that the current dew point temperature of the circulating air is higher than the ideal dew point temperature and not higher than the dew point temperature maximum value, and the relative humidity of the circulating air is lower than the relative humidity maximum value, and the temperature is within a reasonable range, as shown in region 4 of fig. 13, the unit can be controlled not to be humidified, or the unit can be controlled to perform dehumidification and humidification with the set relative humidity target value as a target, and the dew point temperature of the processed circulating air is ensured not to be higher than the dew point temperature maximum value, and the relative humidity is ensured not to be higher than the set relative humidity maximum value;

4. if the current dew point temperature of the circulating air is higher than the maximum dew point temperature value or the current relative humidity of the circulating air is higher than the set maximum relative humidity value and the temperature is in a reasonable range, as shown in an area 5 in fig. 13, the unit is controlled not to be humidified, and the unit is controlled to perform dehumidification by taking the maximum dew point temperature value and the maximum relative humidity value as targets until the dew point temperature of the processed circulating air is not higher than the maximum dew point temperature value and the relative humidity is not higher than the set maximum relative humidity value;

and 4, step 4:

1. if the current temperature of the circulating air is determined to be higher than the over-temperature alarm value, as shown in the area 1 in fig. 11, the area 1 in fig. 12 and the area 1 in fig. 13, the temperature environment of the machine room is abnormal at this time, so that the humidity does not need to be controlled, the humidifier does not humidify, and the unit can be controlled to perform 100% refrigeration operation, so that the temperature of the machine room can be quickly reduced back to a reasonable range;

2. if it is determined that the current temperature of the circulating air is lower than the over-temperature alarm value, as shown in the area 6 of fig. 11, the area 3 of fig. 12, and the area 6 of fig. 7, the temperature environment of the machine room is already abnormal, so that the humidity does not need to be controlled, the humidifier does not humidify, and the unit can be controlled to perform 100% heating operation, so that the temperature of the machine room can be quickly raised back to the reasonable range.

In the scheme provided by the embodiment, on the basis of conventional temperature control, the dew point temperature is adopted to control the humidity according to the physical properties of air, so that the influence of the temperature on the relative humidity is avoided, the condition that an air conditioner performs refrigeration and dehumidification and humidifies is avoided to the greatest extent, and the effects of saving energy and water are achieved; and the possibility of temperature and humidity fluctuation of the processed air is reduced, and the reliability and the accuracy of temperature and humidity control are improved.

In addition, the humidity control method provided by this embodiment adopts range control, comprehensively refers to the dew point temperature without condensation, the ideal dew point temperature, the target value of relative humidity, and the like, and can stably control the dew point temperature of the circulating air within a reasonable range, even on the ideal dew point temperature value, to ensure the moisture content of the environment to be stable, thereby further avoiding the situation that the air conditioner humidifies while refrigerating, achieving the effects of energy saving and water saving, reducing the temperature and humidity fluctuation of the air, and improving the reliability and accuracy of temperature and humidity control.

Example two

Based on the same concept as that of the first embodiment of the present invention, a second embodiment of the present invention provides a humidity control apparatus, specifically as shown in fig. 14, which is a schematic structural diagram of the humidity control apparatus provided in the first embodiment of the present invention, and the apparatus includes:

a detection module 1401 for detecting the current temperature and the current dew point temperature of the circulating air;

a determining module 1402, configured to determine whether a current temperature of the circulating air is within a set dew point temperature control range;

a control module 1403, configured to control the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air according to the current temperature and the current dew point temperature of the circulating air if it is determined that the current temperature of the circulating air is within the set dew point temperature control range according to the determination result of the determination module 1402, so that the dew point temperature of the processed circulating air is not lower than the set lowest dew point temperature value and not higher than the set highest dew point temperature value, and the relative humidity of the processed circulating air is not higher than the set highest relative humidity value;

Alternatively, the detection module 1401 may detect the current temperature of the circulating air by using a temperature sensor or a temperature and humidity sensor.

In addition, it should be noted that, because the current dew point temperature of the circulating air cannot be directly detected by the sensor, and the value of the current dew point temperature is related to the temperature and the relative humidity of the circulating air, the detection module 1401 may detect the current temperature of the circulating air by using the temperature sensor or the temperature and humidity sensor, and detect the current relative humidity of the circulating air by using the humidity sensor or the temperature and humidity sensor, and obtain the current dew point temperature of the circulating air through calculation, which is not described herein again.

That is to say, the humidity control device provided by this embodiment can control the humidity according to the physical properties of the air by using the dew point temperature based on the conventional temperature control, and avoids the influence of the temperature on the relative humidity, thereby avoiding the occurrence of the condition that the air conditioner dehumidifies and humidifies at the same time to the greatest extent, and achieving the effects of energy saving and water saving; and the possibility of temperature and humidity fluctuation of the processed air is reduced, and the reliability and the accuracy of temperature and humidity control are improved.

Optionally, the control module 1403 is specifically configured to:

if the current temperature of the circulating air is determined to be within the set dew point temperature control range according to the determination result of the determination module 1402, and if the non-condensation dew point temperature is determined to be not lower than the set dew point temperature lowest value and not higher than the set dew point temperature highest value, the following operations are executed:

In addition, it should be noted that the heat exchanger surface temperature may be any temperature value that can represent the heat exchanger surface temperature, such as the heat exchanger inlet temperature, the heat exchanger minimum temperature, or the heat exchanger intermediate temperature, and is not described herein again.

Further, the control module 1403 is configured to:

if the set ideal dew point temperature needs to be referred to, the following operations are executed:

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the ideal dew point temperature, and the dew point temperature without condensation is not higher than the ideal dew point temperature, controlling the unit not to humidify, or controlling the unit to humidify by taking the dew point temperature without condensation as a target, and enabling the dew point temperature of the processed circulating air not to be higher than the dew point temperature without condensation;

or if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the ideal dew point temperature, and the non-condensation dew point temperature is higher than the ideal dew point temperature, the unit is controlled not to be humidified, or the unit is controlled to be humidified by taking the ideal dew point temperature as a target, and the dew point temperature of the processed circulating air is not higher than the non-condensation dew point temperature;

or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the maximum dew point temperature and the non-condensation dew point temperature is determined to be not higher than the ideal dew point temperature, the unit is controlled not to humidify, or the unit is controlled to dehumidify and humidify by taking a set relative humidity target value as a target, so that the processed circulating air dew point temperature is close to the ideal dew point temperature, or the relative humidity is close to the relative humidity target value;

or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the maximum dew point temperature and the non-condensation dew point temperature is determined to be higher than the ideal dew point temperature, the unit is controlled not to be humidified, or the unit is controlled to perform dehumidification by taking the ideal dew point temperature as a target, and the dew point temperature of the processed circulating air is not higher than the non-condensation dew point temperature;

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the dew point temperature without condensation, the unit is controlled not to humidify, or the unit is controlled to humidify by taking the dew point temperature without condensation as a target, and the dew point temperature of the treated circulating air is not higher than the dew point temperature without condensation;

or if the current dew point temperature of the circulating air is determined to be higher than the non-condensation dew point temperature and not higher than the dew point temperature maximum value, the unit is controlled not to humidify, or the unit is controlled to dehumidify and humidify by taking a set relative humidity target value as a target.

Optionally, the control module 1403 is specifically configured to:

and if the current temperature of the circulating air is determined to be within the set dew point temperature control range according to the judgment result of the judgment module 1402, and if the non-condensation dew point temperature is determined to be lower than the set dew point temperature minimum value, controlling the unit to humidify by taking the dew point temperature minimum value as a target until the dew point temperature of the processed circulating air is not lower than the dew point temperature minimum value.

It should be noted that, at this time, the dew point temperature of no condensation is lower than the set minimum dew point temperature, and even if the device has adjusted the dew point temperature of the circulating air to be within a reasonable range (i.e., not lower than the minimum dew point temperature and not higher than the maximum dew point temperature), since the dew point temperature of the circulating air is higher than the dew point temperature of no condensation, the unit will perform self-dehumidification with the dew point temperature of no condensation as the target, that is, at this time, the unit is in a high energy consumption operating state by both humidification and dehumidification. In addition, at this time, the device can control the unit to alarm so as to inform corresponding operators.

Optionally, the control module 1403 is specifically configured to:

if the current temperature of the circulating air is determined to be within the set dew point temperature control range according to the judgment result of the judgment module 1402, and if the non-condensation dew point temperature is determined to be higher than the set dew point temperature maximum value, the following operations are executed:

Further, the control module 1403 is configured to:

if the current dew point temperature of the circulating air is determined to be not lower than the lowest dew point temperature value and not higher than the ideal dew point temperature, controlling the unit not to humidify or controlling the unit to humidify by taking the ideal dew point temperature as a target;

or if the current dew point temperature of the circulating air is determined to be higher than the ideal dew point temperature and not higher than the dew point temperature maximum value, controlling the unit not to humidify, or controlling the unit to dehumidify and humidify by taking a set relative humidity target value as a target;

and if the set ideal dew point temperature does not need to be referred, the unit is controlled not to be humidified, or the unit is controlled to perform dehumidification and humidification by taking the set relative humidity target value as a target.

Further, the control module 1403 is further configured to control the unit not to humidify and not to dehumidify if it is determined that the current temperature of the circulating air is outside the set dew point temperature control range according to the determination result of the determination module 1402.

It should be noted that, the current temperature of the circulating air is outside the set dew point temperature control range, which indicates that the current ambient temperature may be abnormal, and at this time, humidification or dehumidification is performed, which is not beneficial to rapidly lowering or raising the ambient temperature back to a reasonable range, so the control module 1403 needs to control the unit not to humidify and dehumidify. In addition, in this case, the unit cooling or heating may be controlled simultaneously.

For example, when a first boundary of the dew point temperature control range is set to be equal to a set over-temperature alarm value, and a second boundary of the dew point temperature control range is set to be equal to a set over-temperature alarm value, if the current temperature of the circulating air is higher than the second boundary, namely higher than the over-temperature alarm value, the ambient temperature is over-high, and if the unit is controlled to humidify or dehumidify under the condition, the unit is not favorable for refrigerating; in addition, in the situation where the machine room is not producing humidity, when the ambient temperature is too high, the relative humidity will not be too high, that is, there is no need for dehumidification, therefore, in this case, the control module 1403 may control the machine set to perform neither humidification nor dehumidification, and control the machine set to perform 100% refrigeration, so that the ambient temperature quickly falls below the over-temperature alarm value.

The humidity control device provided by the embodiment can control the humidity by adopting the dew point temperature according to the physical properties of air, avoids the influence of the temperature on the relative humidity, also adopts range control, comprehensively references the dew point temperature without condensation, the ideal dew point temperature, the relative humidity target value and the like, can stably control the dew point temperature of the circulating air within a reasonable range, even on the ideal dew point temperature value, ensures the moisture content of the environment to be stable, further avoids the condition that the air conditioner dehumidifies and humidifies at the same time, realizes the effects of energy conservation and water conservation, reduces the temperature and humidity fluctuation of the air, and improves the reliability and accuracy of the temperature and humidity control.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of humidity control, the method comprising:

2. The method of claim 1,

the first boundary of the dew point temperature control range is not lower than a set over-low temperature alarm value, and the second boundary of the dew point temperature control range is not higher than a set over-high temperature alarm value; or

The first boundary of the dew point temperature control range is lower than the set over-low temperature alarm value, and the second boundary of the dew point temperature control range is higher than the set over-high temperature alarm value;

wherein a first boundary of the dew point temperature control range is lower than a second boundary of the dew point temperature control range.

3. The method of claim 2, wherein if it is determined that the current temperature of the circulating air is within the set dew point temperature control range, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air based on the current temperature and the current dew point temperature of the circulating air such that the dew point temperature of the treated circulating air is not lower than the set dew point temperature minimum and not higher than the set dew point temperature maximum, and such that the relative humidity of the treated circulating air is not higher than the set relative humidity maximum comprises:

4. The method of claim 3, wherein if it is determined that the current dew point temperature of the circulating air is not lower than the dew point temperature minimum and not higher than the dew point temperature maximum, and the current relative humidity of the circulating air is not higher than the set relative humidity maximum, and the current temperature of the circulating air is not lower than the temperature too low alarm and not higher than the temperature too high alarm, the unit is controlled not to humidify, or the unit is controlled to humidify with the non-condensation dew point temperature or the set ideal dew point temperature as a target, or the unit is controlled to dehumidify and humidify with the set relative humidity target value as a target, comprising:

5. The method of claim 2, wherein if it is determined that the current temperature of the circulating air is within the set dew point temperature control range, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air based on the current temperature and the current dew point temperature of the circulating air such that the dew point temperature of the treated circulating air is not lower than the set dew point temperature minimum and not higher than the set dew point temperature maximum, and such that the relative humidity of the treated circulating air is not higher than the set relative humidity maximum comprises:

6. The method of claim 2, wherein if it is determined that the current temperature of the circulating air is within the set dew point temperature control range, controlling the humidification and dehumidification states of the unit to adjust the dew point temperature and the relative humidity of the circulating air based on the current temperature and the current dew point temperature of the circulating air such that the dew point temperature of the treated circulating air is not lower than the set dew point temperature minimum and not higher than the set dew point temperature maximum, and such that the relative humidity of the treated circulating air is not higher than the set relative humidity maximum comprises:

7. The method according to claim 6, characterized in that if it is determined that the current dew point temperature of the circulating air is not lower than the dew point temperature minimum and not higher than the dew point temperature maximum, and the current relative humidity of the circulating air is not higher than the set relative humidity maximum, and the current temperature of the circulating air is not lower than the temperature too low alarm value and not higher than the temperature too high alarm value, the unit is controlled not to be humidified; or, the control unit uses the set ideal dew point temperature as the target to humidify, or the control unit uses the set relative humidity target value as the target to dehumidify and humidify, comprising:

8. The method of claim 1, wherein the method further comprises:

9. A humidity control apparatus, characterized in that the apparatus comprises:

10. The apparatus of claim 9,

11. The apparatus of claim 10, wherein the control module is specifically configured to:

12. The apparatus of claim 11, wherein the control module is specifically configured to:

13. The apparatus of claim 10, wherein the control module is specifically configured to:

14. The apparatus of claim 10, wherein the control module is specifically configured to:

15. The apparatus of claim 14, wherein the control module is specifically configured to:

16. The apparatus of claim 9,

and the control module is also used for controlling the unit not to humidify and dehumidify if the current temperature of the circulating air is determined to be out of the set dew point temperature control range according to the judgment result of the judgment module.