A precise humidity control system and humidification method thereof

Abstract

The present application discloses a precise humidity control system and a humidification method thereof, the precise humidity control system comprising: at least two humidification systems, a controller connected to each of the humidification systems, and a humidity sensor connected to the controller; the humidification system comprises: a humidification water tank, a wet film arranged in the humidification water tank, a humidification water pump for conveying water to the wet film, and a heater for adjusting the water temperature, the humidification water tank is provided with a return air port, the return air port is provided with a humidification fan connected to the wet film, the humidification fan, the humidification water pump and the heater are respectively connected to the controller; each of the humidification systems sets multiple gears in a step-by-step manner according to the heating power. The present application forms an independent humidification system with multiple gears of humidification through each humidification system, realizes precise humidity control controlled by dual systems or multiple systems, the humidification effect is very stable, and the purpose of precise humidification can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of constant humidity control, and in particular to a precise humidity control system and a humidification method thereof suitable for a constant temperature and humidity unit. Background Art

[0002] The humidification systems currently on the market generally use steam humidification, ultrasonic humidification or wet film humidification. These humidification methods can only use intermittent humidification to meet the humidification needs, which will cause the humidification amount to reach the humidification control requirements very quickly, making it difficult to ensure that the deviation of humidification accuracy is within a small range. Summary of the invention

[0003] (I) Purpose of the invention

[0004] The purpose of the present invention is to provide a precise humidity control system and a humidification method thereof, wherein each humidification system forms an independent humidification system with multiple humidification levels, thereby realizing precise humidity control of dual-system or multi-system control, and the humidification effect is very stable, which can achieve the purpose of precise humidification.

[0005] (II) Technical solution

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A precise humidity control system, comprising:

[0008] At least two humidification systems, a controller connected to each of the humidification systems, and a humidity sensor connected to the controller; the humidification system includes: a humidification water tank, a wet film arranged in the humidification water tank, a humidification water pump for conveying water to the wet film, and a heater for adjusting the water temperature, the humidification water tank is provided with a return air port, a humidification fan connected to the wet film is provided at the return air port, the humidification fan, the humidification water pump and the heater are respectively connected to the controller; each of the humidification systems is set with multiple gears in a step-by-step manner according to the heating power.

[0009] In some embodiments, the controller is connected to a temperature sensor for detecting the current water temperature in the humidification water tank in real time.

[0010] In some embodiments, the controller is connected to a water replenishment solenoid valve disposed at a water inlet of the humidification water tank, and the water replenishment solenoid valve is connected to high and low liquid level switches.

[0011] A humidification method of the precise humidity control system based on any one of the above items, comprising the following method:

[0012] Set the target humidity and determine the first gear matching the target humidity;

[0013] Running the humidification system corresponding to the first gear, filling the humidification water tank of the humidification system with water, controlling the humidification fan and the humidification water pump to run continuously, and starting the heater to heat the water to the current water temperature according to the heating power of the first gear, so that the water at the current water temperature is transported to the wet film through the humidification water pump for evaporation, so as to obtain the first humidity;

[0014] Whether the first humidity matches the target humidity is detected in real time, and the heating power of the first gear or the heating power of the second gear is started at intervals to control the current humidity within the deviation limit range of the target humidity.

[0015] In some embodiments, when the first humidity matches the target humidity, the heating power of the first gear is started at intervals to make the first humidity within a deviation limit range of the target humidity.

[0016] In some embodiments, when the first humidity does not match the target humidity, it is determined that the first gear meets the humidity compensation condition, and according to the humidity compensation value between the first humidity and the target humidity, the heating power of the second gear is started to obtain the target humidity;

[0017] The heating power of the second gear is started at intervals to control the target humidity to be within a deviation limit range.

[0018] In some embodiments, each of the second gears is set as a lower gear than the first gear, and the heating power of the second gear is greater than the heating power of the first gear.

[0019] In some embodiments, the step of starting the heating power of the second gear at each interval includes:

[0020] Setting the deviation limit of the target humidity H to Ha≤H≤Hb;

[0021] When the current humidity Hn is less than Ha, the heater at the second gear is started;

[0022] When the current humidity Hn>Hb, the heater at the second gear is turned off.

[0023] In some embodiments, a constant water temperature value T is set for each gear position, and the deviation limit of the constant water temperature value T is Ta≤T≤Tb. When the current water temperature Tn<Ta, the heater corresponding to the current gear position is started to raise the current water temperature Tn to the constant water temperature value T.

[0024] In some embodiments, the lower limit value of the water temperature deviation of the constant water temperature value T is Ta=T-2°C.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. This precise humidity control system can provide reliable and stable humidification for low-temperature, cold and dry environments, avoiding the situation where the humidification amount is greatly reduced due to low evaporation caused by the low-temperature, cold and dry environment.

[0027] 2. The humidification method of this precise humidity control system can meet the requirements of different evaporation humidification according to different evaporation requirements, achieve the effect of precise humidification, and realize precise humidity control of dual-system or multi-system control. The humidification effect is very stable and can achieve the purpose of precise humidification. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a humidification system according to an embodiment of the present invention;

[0029] Figure 2 The humidification method according to one embodiment of the present invention is as follows: Figure 1 ;

[0030] Figure 3 The humidification method according to one embodiment of the present invention is as follows: Figure 2 ;

[0031] Figure 4 The humidification method according to one embodiment of the present invention is as follows: Figure 3 ;

[0032] Figure 5 It is an operation control diagram of a humidification method according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] 1. Humidification water tank; 2. Wet membrane; 3. Humidification water pump; 4. Humidification fan; 5. Heater; 6. Water supply solenoid valve. DETAILED DESCRIPTION

[0035] The following further describes the specific implementation modes of the present invention in conjunction with the accompanying drawings of the specification to make the technical solutions and beneficial effects of the present invention clearer and more specific.

[0036] The present invention belongs to the case where the constant temperature and humidity unit adopts heat balance refrigeration. Since the unit is always refrigerating, the excess cooling capacity is balanced by the heater, so as to achieve the required precise cooling capacity. In this case, since the unit is always refrigerating, the dehumidification situation always exists, so the system needs to be humidified continuously to ensure the humidity of the space; therefore, a stable humidification amount needs to be provided to the system in this case.

[0037] See also Figure 1A precise humidity control system of the present embodiment shown includes: at least two humidification systems, controllers respectively connected to each humidification system, and humidity sensors connected to the controllers; each humidification system includes: a humidification water tank 1, a wet film 2 arranged in the humidification water tank 1, a humidification water pump 3 for conveying water to the wet film 2, and a heater 5 for adjusting the water temperature; the humidification water tank 1 is provided with an air inlet and a return air outlet, and a humidification fan 4 connected to the wet film 2 is provided at the return air outlet, and the humidification fan 4, the humidification water pump 3 and the heater 5 are respectively connected to the controller.

[0038] In this embodiment, each humidification system is set with multiple gears, and each gear is set in sequence according to the heating power in a step-by-step manner, and different water temperatures are formed according to different heating powers. Therefore, this system can increase the water temperature through the heater 5, and can be divided into multiple fixed gears according to different water temperature requirements, and the water temperature ranges from the lowest low water temperature to the highest high water temperature. Since the evaporation amount at low water temperature is small and the evaporation amount at high water temperature is large, multiple gears of evaporation amount are formed, and correspondingly, multiple gears of humidification amount are formed; thus, the evaporation amount is adjusted by increasing the water temperature through the heater 5 to ensure that under different evaporation amount requirements, the requirements of different evaporation amount humidification can be met, thereby achieving the effect of precise humidification.

[0039] When the system needs humidification: start the humidification fan 4 and the humidification water pump 3. The humidification fan 4 and the humidification water pump 3 continue to run during the humidification process, and the air enters from the air inlet of the water tank and the air exits from the return air outlet. Among them, when the humidification water pump 3 pumps water to the top of the wet film 2, the water forms a natural shower state from the wet film 2. The humidification fan 4 can increase the evaporation of water when the wind passes through the wet film 2. Therefore, the evaporation amount is adjusted by increasing the water temperature through the heater 5, which can meet the humidification requirements corresponding to different evaporation amounts, thereby achieving the effect of precise humidification. At the same time, it can also provide reliable and stable humidification for low-temperature cold and dry environments, avoiding the situation where the humidification amount is greatly reduced due to low evaporation caused by the low-temperature cold and dry environment.

[0040] like Figure 1-5 As shown, this embodiment discloses a humidification method based on the above-mentioned precise humidity control system, comprising the following steps:

[0041] S1: at least two humidification systems are provided, and controllers are independently connected to each humidification system, and each humidification system is set to multiple gears in a step-by-step manner according to the heating power;

[0042] S2: setting a target humidity, determining a first gear position that matches the target humidity; and obtaining a second gear position corresponding to the first gear position;

[0043] S3: The controller runs the humidification system corresponding to the first gear through PID logic, fills the humidification water tank of the humidification system with water, controls the humidification fan 4 and the humidification water pump 3 in the humidification system to run continuously, and starts the heater 5 to heat the water in the humidification water tank 1 to the current water temperature according to the heating power of the first gear, so that the water at the current water temperature is transported to the wet film 2 through the humidification water pump 3 for evaporation, and obtains the first humidity;

[0044] S4: The humidity sensor detects in real time whether the first humidity matches the target humidity. Under the PID logic control of the controller, the first gear heating power or the second gear heating power is started at intervals to control the current humidity within the deviation limit of the target humidity.

[0045] It can be seen from the above humidification steps that the controller turns on or off the heater 5 through the PID logic method, and the humidification system uses the heater 5 to increase the water temperature to adjust the evaporation amount, thereby adjusting the humidification amount corresponding to the evaporation amount to ensure that the target humidity of the system is within the deviation limit of the target humidity, thereby outputting a stable humidification amount to achieve the target humidity. Since the evaporation amount at low water temperature is small and the evaporation amount at high water temperature is large, the evaporation amount at different water temperatures is used to form a fixed humidification amount that increases step by step, realizing a multi-stage fixed gear design, so that each humidification system forms an independent humidification system with multiple gears of humidification, and realizes precise humidity control of dual system or multi-system control.

[0046] In step S4 of this embodiment, the heating power for the interval start is determined according to whether the first humidity matches the target humidity, such as Figure 3 As shown, specifically including:

[0047] S41: When the first humidity matches the target humidity, it is determined that the first humidity is within the deviation limit of the target humidity, that is, the first humidity is the current humidity that matches the target humidity, then the heater 5 corresponding to the first gear is started according to the heating power interval of the first gear, and the humidification water tank 1 in the humidification system corresponding to the first gear is intermittently heated to control the current humidity within the deviation limit of the target humidity.

[0048] S42: when the first humidity does not match the target humidity, it is determined that the first gear meets the humidity compensation condition, and according to the humidity compensation value between the first humidity and the target humidity, the heater 5 of the humidification system corresponding to the second gear is started according to the heating power of the second gear, and the current water temperature of the first gear is compensated and heated to heat the current water temperature to the required water temperature of the target humidity, thereby obtaining the target humidity;

[0049] S43: After the target humidity is obtained through the compensation heating of the second gear, the heater 5 of the second gear is started according to the heating power interval of the second gear to control the target humidity to be within the deviation limit range.

[0050] Therefore, the system is humidified by raising the water temperature to increase the evaporation amount and thus the humidification amount, and the heater 5 is turned on or off in the PID logic of the controller, so that the system has a fixed humidification amount at the first humidity and stable humidification, and then the next level is used to supplement the humidification amount difference between the first humidity and the target humidity, so that the system can achieve a precise humidification amount, thereby ensuring the stability of the target humidity.

[0051] Furthermore, the controller uses the humidity sensor to detect the humidification amount, and controls the start of the heater 5 through the upper and lower deviation values ​​of the target humidity; when the heater 5 is started, the water temperature rises, and the corresponding humidification amount increases for each increase in the water temperature, so that the water temperature decreases with evaporation; the heater 5 is started repeatedly to ensure the water temperature to meet the evaporation demand, thereby obtaining a water temperature in a stable range, and thus obtaining a stable humidification amount. Therefore, the humidification amount is controlled by the humidification amount to increase the water temperature to adjust the evaporation amount, thereby ensuring that under different evaporation demands, the requirements of different evaporation humidification can be met, and the purpose of precise humidification is achieved. Therefore, the method of intermittently starting the heater 5 is used to ensure humidification, so that the humidification process is very stable, and precise humidity control is used to achieve a small deviation range of humidity, thereby achieving the purpose of precise humidification.

[0052] In this embodiment, the second gear is set as a lower gear of the first gear, and the heating power of the second gear is greater than the heating power of the first gear. Among them, the first gear is a constant gear with a constant water temperature value in any humidification system, and the humidification amount of water at the constant water temperature value forms the first humidity of the first gear. When the first gear is the end gear of the first humidification system, the second gear can be the head gear of the second humidification system. Thus, the gears of each level are arranged in sequence according to the constant water temperature value formed by the increasing heating power step by step.

[0053] For example, in this embodiment, two independent humidification systems are provided, and the water temperature of each humidification system can be divided into three gears according to different needs, and the water temperature ranges from the first gear low water temperature to the third gear high water temperature: the first gear with low evaporation without heating, the second gear with medium evaporation relative to the first gear high water temperature, the third gear with high evaporation relative to the second gear high water temperature, etc., thereby forming three gears of evaporation, and also forming three gears of humidification. In the two independent humidification systems of the first humidification system and the second humidification system, the humidification amount of three gears can be set, as follows:

[0054] 1. The first humidification system (first gear): 0.8L / h (the original tap water temperature is 20 degrees);

[0055] 2. First humidification system (second gear): 1.2L / h (the original tap water temperature is raised to 30 degrees through the humidification heater 5);

[0056] 3. The first humidification system (third gear): 1.6L / h (the original water temperature of 30 degrees is raised to 40 degrees through the humidification heater 5);

[0057] This allows a single humidification system to form three levels of humidification.

[0058] When two humidification systems are selected, the two humidification systems can be superimposed as follows:

[0059] 1. The first humidification system (first gear): 0.8L / h (the original tap water temperature is 20 degrees);

[0060] 2. First humidification system (second gear): 1.2L / h (the original tap water temperature is raised to 30 degrees through the humidification heater 5);

[0061] 3. The first humidification system (third gear): 1.6L / h (the original water temperature of 30 degrees is raised to 40 degrees through the humidification heater 5);

[0062] 4. Second humidification system (first gear): 1.6L / h+0.8L / h=2.4L / h (original tap water temperature 20 degrees);

[0063] 5. Second humidification system (second gear): 1.6L / h+1.2L / h=2.8L / h (the original tap water temperature is raised to 30 degrees through the humidification heater 5);

[0064] 6. Second humidification system (third gear): 1.6L / h+1.6L / h=3.2L / h (the original water temperature of 30 degrees is raised to 40 degrees through the humidification heater 5).

[0065] When the system needs to turn on humidification, it is turned on in a single step, and when the system is turned off, it is turned off in a single step. Therefore, the fixed humidification amount formed by the single-level gear is used, and the insufficient humidification amount outside the fixed humidification amount is compensated by the next level fixed gear to adjust the humidification, ensuring the accuracy of humidification.

[0066] For example:

[0067] If the system requires a target humidity of 1.2L / h, then the second-speed humidification is just the right match, thus forming a stable humidification amount and the humidity is very stable.

[0068] If the system requires a target humidity of 1.4L / h, the second gear is a fixed humidification amount with a fixed output. The second gear guarantees a humidification amount of 1.2L / h, and the third gear is to intermittently start the heater 5 (data can be collected every 20 seconds, and the heater 5 is turned off when the humidification amount reaches the predetermined humidity. If it exceeds the upper and lower limits of the humidification amount deviation, the heater 5 is turned on for intermittent heating), so the humidification is stable and the humidification amount is accurate.

[0069] If the system requires a target humidity of 2.0L / h, the third gear is a fixed humidification amount with a fixed output. The third gear guarantees a humidification amount of 1.6L / h, and the fourth gear is an intermittent start (data is collected every 20 seconds, and the heater 5 is turned off when the humidification amount reaches the predetermined humidity. If it exceeds the upper and lower limits of the humidification amount deviation, the heater 5 is turned on for intermittent heating), so the humidification is stable and the humidification amount is accurate.

[0070] like Figure 4 As shown, in steps S4 and S43 of this embodiment, the step of starting the humidification of the heating power / heater 5 at intervals of the second gear includes:

[0071] S44: Setting the deviation limit of the target humidity H to Ha≤H≤Hb;

[0072] S45: When the current humidity Hn is less than Ha, the heater 5 of the second gear is started;

[0073] S46: When the current humidity Hn>Hb, turn off the heater 5 at the second gear.

[0074] From the above humidification steps, it can be seen that, first, the current water temperature is heated through the first gear to its evaporation amount equal to the current humidity, ensuring that the system always has a constant humidity; secondly, the PID control logic of the controller is adopted. If the current humidity provided by the first gear cannot match the target humidity, that is, there is a humidity compensation value between the current humidity and the target humidity, causing the current humidity to exceed the deviation limit range of the target humidity, then the lower gear of the first gear - the second gear is started to compensate for this humidity compensation value.

[0075] Therefore, the required water temperature for evaporation is controlled by determining the target humidity and the upper and lower humidity deviation limits, so that the water temperature is in a stable range. A stable water temperature range can obtain a stable evaporation amount, and a stable evaporation amount can obtain a stable humidification amount.

[0076] In this embodiment, since each gear increases step by step according to the heating power, each gear has a corresponding constant water temperature value, and each gear is arranged in order according to the constant water temperature value. Among them, the water temperature deviation limit of the constant water temperature value T is Ta≤T≤Tb. When the current water temperature Tn<Ta, the heater 5 corresponding to the current gear is started to raise the current water temperature Tn to the constant water temperature value T. Among them, T is the constant water temperature value, Ta is the upper deviation value, Tb is the lower deviation value, and Tn is the current water temperature.

[0077] Since the water temperature will decrease with evaporation, the heater 5 is started when the water temperature of each gear is lower than the negative deviation Ta, so that the water temperature is basically guaranteed to be within the required water temperature range of each gear, and the evaporation of water is stably maintained. Therefore, the heater 5 is started repeatedly to ensure the water temperature, so as to meet the demand for stable output of evaporation, and a stable humidification amount is obtained through a stable water temperature range, and the humidity of the space is accurately controlled.

[0078] It can be seen that when a certain gear is in intermittent start, the water temperature of this gear is in a stable range. Due to the stability of the water temperature range, the evaporation amount is stable, and the stability of the evaporation amount ensures the stability of the humidification amount, achieving precise humidity control.

[0079] In this embodiment, the lower limit value of the water temperature deviation of the constant water temperature value T is Ta=T-2°C. Therefore, the heater 5 is started when the water temperature of each fixed gear is a negative deviation of 2 degrees, so as to avoid the problem of a sudden drop in evaporation caused by a large temperature difference of the current water temperature, ensure that the humidity in the space is maintained in a stable state, and improve the precision of humidity control.

[0080] Here, the 2°C of T-2°C can be set according to the required situation, and the current 2°C is the default value. For example: the first gear water temperature is 20 degrees, the second gear water temperature is 30 degrees, then the heater 5 is started to heat the water temperature at 30-2 degrees, so that the water temperature is basically guaranteed to be at the required 30 degrees; so that the evaporation of water is very stable; the third gear water temperature is 40 degrees, then when the water temperature is 40-2 degrees, the heater 5 is started to heat the water temperature, so that the water temperature is basically guaranteed to be at the required 40 degrees.

[0081] In this embodiment, the controller is connected to a temperature sensor for real-time detection of the current water temperature in the humidification water tank 1. Since the system operation will continuously cause the water temperature to drop, and water evaporation will also cause the water temperature to drop, the humidification heater 5 needs to be restarted to raise the water temperature again, increase the evaporation amount and increase the humidity of the air. Thus, the water temperature is detected in real time by the temperature sensor, and the heater 5 is repeatedly started to ensure the water temperature by controlling the water temperature, thereby achieving the requirement of stable evaporation amount, and thus obtaining a stable humidification amount.

[0082] In this embodiment, the controller is connected to a water replenishment solenoid valve 6, which is arranged at the water inlet of the humidification water tank 1 to replenish the evaporated water in the humidification water tank 1. As an auxiliary system, the water replenishment solenoid valve 6 can replenish the evaporated water by the water replenishment solenoid valve 6 to ensure a stable amount of water evaporation. The water replenishment battery valve 6 is connected to a high and low liquid level switch for controlling the water replenishment solenoid valve 6. The controller controls the water replenishment solenoid valve 6 according to the high and low water level switch disconnect or connection signal, starts the water replenishment solenoid valve 6 when the low liquid level switch is disconnected, and disconnects the water replenishment solenoid valve 6 when the high liquid level switch is closed. As a result, the water replenishment solenoid valve 6 is independently controlled by the high and low liquid level switches, starts the water replenishment solenoid valve 6 when both the high and low liquid level switches are disconnected, and closes the water replenishment solenoid valve 6 when the high liquid level switch is closed.

[0083] For example:

[0084] When the high liquid level switch is closed, the output of the water replenishment solenoid valve 6 of the corresponding humidification water tank 1 is stopped; for example, when the first high liquid level switch is closed, the water replenishment solenoid valve 61 of the humidification water tank 1 is disconnected;

[0085] When the corresponding high liquid level switch is disconnected and the corresponding low liquid level switch is disconnected, the corresponding humidification water tank 1 water replenishment solenoid valve 6 output is started; for example: when the first high liquid level switch is disconnected and the first low liquid level switch is disconnected, the humidification water tank 1 water replenishment solenoid valve 61 is started;

[0086] When the low liquid level switch is disconnected, the operation of the corresponding humidification water tank 1 heater 5 is stopped;

[0087] When the first low liquid level switch is disconnected for 5 consecutive minutes, a water shortage fault is displayed and an alarm is issued. It will automatically recover after the data returns to normal.

[0088] The following are specific target humidity, for example:

[0089] When the system needs a target humidity of 1.4L / h, the humidification fan 4 and the humidification water pump 3 are started;

[0090] The system recognizes fixed humidification in the second gear, plus intermittent start in the third gear.

[0091] When the system has reached the start-up level 2 (1.2L / h) and still does not meet the lower humidity deviation, the system will start the third level water temperature. When the system starts the third level water temperature, as the water temperature increases, the evaporation amount increases, and the humidification amount also increases. When the humidification amount reaches the upper limit of the target humidity deviation, the output of the humidification heater 5 is stopped.

[0092] If the system needs a target humidity of 2.0L / h, the third gear is a fixed output to ensure a humidification amount of 1.6L / h, and the fourth gear is an intermittent start (data is collected every 20 seconds, closed when the humidity is reached, and turned on when the start condition is reached). In this case, only 0.8L / h of intermittent start is used to ensure the humidity, and 0.8L / h can be divided into 0.8 divided by 180min, so the intermittent start-up humidity is 0.004L / min, so the humidification is stable and the humidification amount is accurate.

[0093] Since the heater 5 of the system can heat the water to be humidified, the humidification amount is ensured when humidifying a low-temperature cold and dry environment, and the water will not lose its humidification function due to the low temperature causing it to be difficult to evaporate.

[0094] Normally, the humidification fan 4 and the humidification water pump 3 are always running, which causes the evaporation of water and the decrease of water temperature. The decrease of water temperature leads to the decrease of evaporation, and the humidity of the air gradually reaches the lower limit of the set humidity. At this time, the third gear of humidification needs to be started again because the lower limit of the set humidity is touched. Since the water temperature is continuously reduced during operation, the humidification heater 5 needs to be started again, so that the water temperature rises again. With the increase of water temperature, the evaporation increases again. With the increase of evaporation, the humidity of the air increases again. When the upper limit of the humidity setting is reached, the heater 5 is turned off again; in this way, the water temperature decreases with evaporation; the heater 5 is started repeatedly to ensure the water temperature to meet the evaporation demand. Therefore, when the humidification heater 5 is started, the water temperature rises, and the corresponding humidification amount increases for each increase in the water temperature. The start of the heater 5 is controlled by the upper and lower deviations of the set humidity, so as to obtain a water temperature in a stable range, and thus obtain a stable humidification amount.

[0095] The following are the specific humidification controls:

[0096] The first humidification system is composed of a first temperature sensing probe, a first heater, a first humidification water pump, a second humidification fan, a first water replenishment solenoid valve, a first high liquid level switch, and a first low liquid level switch;

[0097] The second humidification system is composed of a second temperature sensing probe, a second heater, a second humidification water pump, a second humidification fan, a second water replenishment solenoid valve, a second high liquid level switch, and a second low liquid level switch;

[0098] like Figure 5 As shown, Note: Wr is the room humidity; Ws is the room set humidity; Wj is the default value of humidity control accuracy (3 in Table 4, range 2%RH~30%RH, default 5%RH).

[0099] Humidification control under special refrigeration conditions

[0100] Operation of the first humidification system under special refrigeration conditions:

[0101] 1. When the first humidification system needs to be started, the first humidification water pump and the second humidification fan are started;

[0102] 2. When the first high liquid level switch is disconnected and the first low liquid level switch is disconnected, the first water replenishment battery valve is started;

[0103] 3. When the first high liquid level switch is closed, close the first water replenishment battery valve;

[0104] 4. When the first temperature probe is less than the first water temperature -2℃ (humidification water temperature heating temperature difference), ① if the first high liquid level switch is in the disconnected state and the first low liquid level switch is in the closed state, start the first heater; ② if the first high liquid level switch and the first low liquid level switch are both in the closed state, start the first heater; ③ if the high and first low liquid level switches are in the disconnected state, start the first water replenishment valve to fill the water, and after the high liquid level is closed, start the first heater; ④ when the first temperature probe is ≥ the first water temperature, turn off the heater; when the conditions are met to start the first heater, the high water level is disconnected in the middle, the low water level is not disconnected, and the first heating requirement is met, continue heating; ⑤ after the conditions are met to start the first heater, the high and low water levels are disconnected in the middle, the heater is not stopped, and water replenishment is started; the high and low water levels are disconnected continuously for 3 minutes, the first heater is stopped immediately; and water replenishment, fault reporting and alarm are performed. It is automatically released until the high and low water levels are closed, but the fault needs to be reset manually.

[0105] 5. When the first temperature sensor is ≥ the first water temperature, turn off the first heater;

[0106] 6. When starting the second-speed water temperature: the first temperature probe < the second-speed water temperature -2℃ (humidification water temperature heating temperature difference, ① if the first high liquid level switch is in the disconnected state, the first low liquid level switch is in the closed state, start the first heater; ② if the first high liquid level switch and the first low liquid level switch are both in the closed state, start the first heater; ③ if the high and first low liquid level switches are in the disconnected state, start the first water replenishment valve to fill the water, and after the high liquid level is closed, start the first heater; ④ when the first temperature probe ≥ the second-speed water temperature, turn off the heater; when the conditions are met to start the first heater, the high water level is disconnected in the middle, the low water level is not disconnected, and the second-speed heating requirements are met, continue heating; ⑤ after the conditions are met to start the first heater, the high and low water levels are disconnected in the middle, the heater is not stopped, and water replenishment is started; the high and low water levels are disconnected for 3 minutes continuously, the first heater is stopped immediately; and water replenishment and fault and alarm are reported. It is automatically released until the high and low water levels are closed, but the fault needs to be reset manually.

[0107] 7. When the first temperature sensor is ≥ the second level water temperature, turn off the heater;

[0108] 8. When starting the three-speed water temperature: when the first temperature probe is less than the third-speed water temperature -2℃ (humidification water temperature heating temperature difference), ① if the first high liquid level switch is in the disconnected state and the first low liquid level switch is in the closed state, start the first heater; ② if the first high liquid level switch and the first low liquid level switch are both in the closed state, start the first heater; ③ if the high and low liquid level switches are in the disconnected state, start the first water replenishment valve to fill the water, and after the high liquid level is closed, start the first heater; ④ when the first temperature probe is ≥ the second-speed water temperature, turn off the heater; when the conditions are met to start the first heater, the high water level is disconnected in the middle, the low water level is not disconnected, and the second-speed heating requirements are met, continue heating; ⑤ after the conditions are met to start the first heater, the high and low water levels are disconnected in the middle, the heater is not stopped, and water replenishment is started; the high and low water levels are disconnected for 3 minutes continuously, the first heater is stopped immediately; and water replenishment and fault and alarm are reported. It is automatically released until the high and low water levels are closed, but the fault needs to be reset manually.

[0109] 9. When the first temperature sensor is ≥ the third level water temperature, turn off the heater;

[0110] 10. Up to fifth gear, and so on;

[0111] The above control, the second humidification system operation is the same as the first humidification system operation

[0112] When Wr≤Ws-Wj, start the humidification system;

[0113] When Wr≥Ws+Wj, turn off the humidification system.

[0114] When dual-system humidification is selected, the humidification start logic loads a water temperature every other humidification loading cycle (for example, 20 seconds), and the start sequence is:

[0115] 1. First humidification system (first gear)

[0116] 2. First humidification system (second gear)

[0117] 3. The first humidification system (three gears)

[0118] 4. The first humidification system (four gears)

[0119] 5. The first humidification system (five levels)

[0120] 6. Second humidification system (first gear)

[0121] 7. Second humidification system (second gear)

[0122] 8. Second humidification system (third gear)

[0123] 9. Second humidification system (fourth gear)

[0124] 10. Second humidification system (five levels)

[0125] If any of the humidification stop conditions is met, the humidification will be turned off, and each closing sequence is the opposite of the opening sequence.

[0126] Any system of the first humidification system and the second humidification system (any fan, water pump, water adding solenoid valve, heater) must be restarted 1 minute after being stopped.

[0127] When a single humidification system is selected, the humidification start logic loads a water temperature every other humidification loading cycle (for example, 20 seconds), and the start sequence is:

[0128] 1. First humidification system (first gear)

[0129] 2. First humidification system (second gear)

[0130] 3. The first humidification system (three gears)

[0131] 4. The first humidification system (four gears)

[0132] 5. The first humidification system (five levels)

[0133] If any of the humidification stop conditions is met, the humidification will be turned off, and each closing sequence is the opposite of the opening sequence.

[0134] The humidification system must be restarted 1 minute after stopping; that is, the humidification fan, humidification water pump, humidification water supply valve, and humidification heater must be restarted 1 minute after stopping (after starting, they can be shut down immediately according to actual conditions).

[0135] Note: When the first humidification system is turned on for humidification, the first humidification water pump and humidification fan are started at the same time; when the second humidification system is turned on for humidification, the second humidification water pump and humidification fan are run at the same time;

[0136] Pay attention to the temperature difference of the water heating in the humidification tank;

[0137] When the compressor stops running, the humidification system stops running, including the humidification water pump, humidification fan, and humidification heater.

[0138] Humidification control operation in other modes

[0139] 1. The water temperature is set to level 1;

[0140] 2. When the requirements for starting humidification are met, the second humidification fan, the second humidification fan, the first humidification water pump, and the second humidification water pump are started;

[0141] 3. When the dehumidification shut-down requirement is reached, the second humidification fan, the second humidification fan, the first humidification water pump, and the second humidification water pump are shut down;

[0142] 4. When it is a single humidification system, the second humidification fan and the first humidification water pump are required to start when humidification is started;

[0143] 5. When it is a single humidification system, the second humidification fan and the first humidification water pump are turned off when the dehumidification shutdown requirement is met;

[0144] 6. Water replenishment and heating are carried out according to the humidification control under "special cooling" conditions;

[0145] 7. In case of failure, humidification control is performed according to the "special cooling" condition;

[0146] The humidification fan, humidification water pump, water supply solenoid valve and heater can be restarted as needed after any of them stops.

[0147] To sum up, the present invention is based on the above-mentioned disclosed technical features and aims to protect a humidification method for a precise humidity control system. The PID humidification logic is adopted through the controller. Under the condition of ensuring that the current humidity of the system has a fixed humidification amount, the compensatory humidification is guaranteed by intermittently starting the output power of the corresponding heater, and the humidification effect is very stable. At the same time, the accuracy of the humidity can be achieved through real-time detection of the humidity deviation range control, thereby achieving the purpose of precise humidification.

[0148] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A humidification method based on a precise humidity control system, characterized in that: Precision humidity control system includes: At least two humidification systems, a controller connected to each of the humidification systems, and a humidity sensor connected to the controller; the humidification system comprises: a humidification water tank, a wet film arranged in the humidification water tank, a humidification water pump for conveying water to the wet film, and a heater for adjusting the water temperature; the humidification water tank is provided with a return air port, a humidification fan connected to the wet film is arranged at the return air port, and the humidification fan, the humidification water pump and the heater are respectively connected to the controller; each of the humidification systems is set with multiple gears in a step-by-step manner according to the heating power; The humidification method includes the following steps: Set the target humidity and determine the first gear matching the target humidity; Running the humidification system corresponding to the first gear, filling the humidification water tank of the humidification system with water, controlling the humidification fan and the humidification water pump to run continuously, and starting the heater to heat the water to the current water temperature according to the heating power of the first gear, so that the water at the current water temperature is transported to the wet film through the humidification water pump for evaporation, so as to obtain the first humidity; detecting in real time whether the first humidity matches the target humidity, and starting the first gear heating power or the second gear heating power at intervals to control the current humidity within a deviation limit range of the target humidity; When the first humidity matches the target humidity, the heating power of the first gear is started at intervals to make the first humidity within the deviation limit range of the target humidity; When the first humidity does not match the target humidity, determining that the first gear meets the humidity compensation condition, and starting the heating power of the second gear to obtain the target humidity according to the humidity compensation value between the first humidity and the target humidity; Starting the heating power of the second gear at intervals to control the target humidity to be within a deviation limit range; The second gear is set as a lower gear of the first gear, and the heating power of the second gear is greater than the heating power of the first gear.

2. The humidification method according to claim 1, characterized in that: The controller is connected to a temperature sensing probe for real-time detection of the current water temperature in the humidification water tank.

3. The humidification method according to claim 1, characterized in that: The controller is connected to a water replenishment solenoid valve arranged at a water inlet of the humidification water tank, and the water replenishment solenoid valve is connected to a high and a low liquid level switch.

4. The humidification method according to claim 1, characterized in that: The step of starting the heating power of the second gear at intervals comprises: Setting the deviation limit of the target humidity H to Ha≤H≤Hb; When the current humidity Hn is less than Ha, the heater at the second gear is started; When the current humidity Hn>Hb, the heater at the second gear is turned off.

5. The humidification method according to claim 1, characterized in that: Each gear position is provided with a constant water temperature value T, and the deviation limit of the constant water temperature value T is Ta≤T≤Tb. When the current water temperature Tn<Ta, the heater corresponding to the current gear position is started to raise the current water temperature Tn back to the constant water temperature value T.

6. The humidification method according to claim 5, characterized in that: The lower limit value of the water temperature deviation of the constant water temperature value T is Ta=T-2°C.

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