A constant temperature and humidity control method and device

Abstract

The present invention provides a constant temperature and humidity control method and device, comprising: a preset setting temperature T 设 、Set relative humidity φ 设 , set temperature change rate △T 设 , set humidity change rate △d 设 According to T 设 and φ 设 Get the moisture content d of the set state 设 ; Detect the air inlet temperature T1 and the air inlet relative humidity φ1 at the air inlet, and obtain the air inlet moisture content d1 according to T1 and φ1; calculate the temperature change rate and humidity change rate according to the detection results; compare the size relationship between the detection results and the preset values, judge the indoor environment according to the size relationship, and automatically adjust the size of the unit windshield, the opening of the electronic expansion valve in the heat exchanger, and the opening and closing of the humidifier according to the indoor environment to adjust the indoor temperature and humidity. The present invention uses an air conditioning heat pump to adjust the temperature and humidity, avoids the problem of cold and heat offset, and saves energy; uses moisture content as a control indicator, is not affected by temperature regulation, and has more accurate control; and can respond to needs quickly.

Description

Technical Field

[0001] The present invention relates to the technical field of constant temperature and humidity control, in particular to a constant temperature and humidity control method and device. Background Art

[0002] Existing constant temperature and humidity units judge the adjustment requirements by comparing the ambient temperature and humidity with the set temperature and humidity by the user. The control program is usually: first, refrigerate to cool down and dehumidify, and then supplement with electric heating for temperature adjustment and a humidifier for humidity adjustment.

[0003] However, if the temperature drops significantly, it will cause excessive dehumidification. At this time, a humidifier is used to humidify and adjust the humidity; if the dehumidification is significant, it will cause excessive temperature drop. At this time, electric heating is used to raise the temperature and adjust the temperature. There is an energy waste problem of cold and heat cancellation between refrigeration and electric heating, and dehumidification and humidification by the humidifier. Moreover, the humidity sensor generally detects the relative humidity of the environment, and the relative humidity value after dehumidification will change with further temperature adjustment. The control process requires multiple feedback adjustments, resulting in a long process for temperature and humidity stabilization and low adjustment accuracy. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a constant temperature and humidity control method and device.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] A constant temperature and humidity control method, which includes:

[0007] S1: Preset the set temperature T 设 , the set relative humidity φ 设 , the set temperature change rate △T 设 , the set humidity change rate △d 设 , the set time t, the running duration t1; obtain the moisture content d of the set state according to T 设 and φ 设 ; 设 ;

[0008] S2: Detect the inlet air temperature T1 and the inlet air relative humidity φ1 of the air inlet, and obtain the inlet air moisture content d1 according to T1 and φ1; calculate the temperature change rate: △T = T1 - T t ; the humidity change rate: △d = d1 - dt; T t is the temperature in the previous t seconds, d t is the humidity in the previous t seconds;

[0009] S3: Compare T1 and T 设 , △T and △T 设 , d1 and d 设 , △d and △d 设The size relationship is used to judge the indoor environment situation according to the size relationship, and the size of the unit air damper, the opening degree of the electronic expansion valve in the heat exchanger, and the opening and closing of the humidifier are automatically adjusted according to the indoor environment situation to adjust the indoor temperature and humidity; until d2 = d 设 or d3 = d 设 or the humidification amount d = d 设 After that, it runs continuously for a time t1, and step S2 is repeated;

[0010] The heat exchanger includes a first heat exchanger and a second heat exchanger; the d2 is the first moisture content obtained by detecting the first temperature T2 and the first relative humidity φ2 at the outlet of the first heat exchanger in real time; the d3 is the second moisture content obtained by detecting the second temperature T3 and the second relative humidity φ3 at the outlet of the second heat exchanger in real time.

[0011] As a further improvement of the present invention: in step S3, if T1 > T 设 and △T > △T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, and the indoor heat and moisture production are large, and rapid cooling and dehumidification are required; at this time, the unit air damper is automatically adjusted to the high air damper, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are in a small opening degree, and the humidifier remains closed; until d3 = d 设 .

[0012] As a further improvement of the present invention: in step S3, if T1 > T 设 and △T > △T 设 , d1 > d 设 and △d < △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, the indoor heat production is large but the moisture production is not large, and rapid cooling and a small amount of dehumidification are required; at this time, the unit air damper is automatically adjusted to the high air damper, the first electronic expansion valve in the first heat exchanger is in a small opening degree, the second electronic expansion valve in the second heat exchanger is in a large opening degree, and the humidifier remains closed; until d2 = d 设 .

[0013] As a further improvement of the present invention: in step S3, if T1 > T 设 and △T > △T 设 , d1 < d 设 , it is determined that the indoor environment is a high-temperature and dry environment at this time, and the indoor heat production is large, and rapid cooling and humidification are required; at this time, the unit air damper is automatically adjusted to the high air damper, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are in a large opening degree, and the humidifier is turned on; until d = d 设 -d1.

[0014] As a further improvement of the present invention: in step S3, if T1 > T 设 and △T < △T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, with a large amount of moisture production in the room but not much heat production. It is necessary to quickly dehumidify and slightly cool down; at this time, the air volume of the unit is automatically adjusted to the medium air volume, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are at a small opening degree, and the humidifier remains closed; until d3 = d 设 .

[0015] As a further improvement of the present invention: in step S3, if T1 > T 设 and △T < △T 设 , d1 > d 设 and △d < △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, and both the heat production and moisture production in the room are not large; at this time, the air volume of the unit is automatically adjusted to the medium air volume, the first electronic expansion valve in the first heat exchanger is at a small opening degree, the second electronic expansion valve in the second heat exchanger is at a large opening degree, and the humidifier remains closed; until d2 = d 设 .

[0016] As a further improvement of the present invention: in step S3, if T1 > T 设 and △T < △T 设 , d1 < d 设 , it is determined that the indoor environment is a high-temperature and dry environment at this time, and the heat production in the air-conditioning area is not large; at this time, the air volume of the unit is automatically adjusted to the medium air volume, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are at a large opening degree, and the humidifier is turned on; until d = d 设 - d1.

[0017] As a further improvement of the present invention: in step S3, if T1 < T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is a low-temperature and high-humidity environment at this time, and the moisture production in the air-conditioning area is large, and it is necessary to quickly heat up and dehumidify; at this time, the air volume of the unit is automatically adjusted to the high air volume, the first electronic expansion valve in the first heat exchanger is at a small opening degree, the second electronic expansion valve in the second heat exchanger is at a large opening degree, and the humidifier remains closed; until d2 = d 设 ;

[0018] In step S3, if T1 < T 设 , d1 > d 设 and △d < △d 设, it is determined that the indoor environment is a low-temperature and high-humidity environment at this time, but the moisture production in the air-conditioned area is not large; at this time, the unit air volume is automatically adjusted to the low gear, the first electronic expansion valve in the first heat exchanger is at a small opening degree, the second electronic expansion valve in the second heat exchanger is at a large opening degree, and the humidifier remains closed; until d2 = d 设 .

[0019] As a further improvement of the present invention: in step S3, if T1 < T 设 , d1 < d 设 , it is determined that the indoor environment is a low-temperature and dry environment at this time, and heating and humidification are required; at this time, the unit operates in the heating mode, and the unit air volume is automatically adjusted to the high gear, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are at a small opening degree, and the humidifier is turned on; until d = d 设 -d1.

[0020] A constant temperature and humidity control device, wherein the constant temperature and humidity control method described in any one of the above is applied, and it is characterized in that it includes a first heat exchanger, a second heat exchanger and a humidifier arranged on the indoor side; the first heat exchanger is arranged between the air inlet of the air conditioner and the second heat exchanger, the first heat exchanger is connected with a first electronic expansion valve, and the second heat exchanger is connected with a second electronic expansion valve; it also includes a first temperature and humidity sensor, a second temperature and humidity sensor and a third temperature and humidity sensor; the first temperature and humidity sensor is arranged at the air inlet, the second temperature and humidity sensor is arranged at the air outlet of the first heat exchanger, and the third temperature and humidity sensor is arranged at the air outlet of the second heat exchanger.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The air-conditioning heat pump is used for temperature and humidity regulation, avoiding the problem of cold and heat offset and saving energy;

[0023] 2. The moisture content is used as the control index, which is not affected by temperature regulation and the control is more accurate;

[0024] 3. The regulation demand is judged according to the temperature and humidity change rate, and the demand can be quickly responded to. Description of the Drawings

[0025] Figure 1 It is a flow schematic diagram of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the prior art of the present invention.

[0028] Description of the reference numerals:

[0029] 10 - Heat exchanger; 101 - Electric heating; 102 - Indoor humidifier; 103 - Heat exchanger; 104 - Electronic expansion valve; 1 - 2 - Outdoor side; 105 - Sensor; 110 - Outdoor stop valve; 106 - Outdoor heat exchanger; 107 - Outdoor four - way valve; 108 - Outdoor compressor; 109 - Outdoor gas - liquid separator; 1 - 1 - Indoor side; 1 - First heat exchanger; 2 - Second heat exchanger; 3 - Humidifier; 11 - First electronic expansion valve; 21 - Second electronic expansion valve; 4 - First temperature and humidity sensor; 12 - Second temperature and humidity sensor; 22 - Third temperature and humidity sensor 22; 5 - Stop valve; 6 - Third heat exchanger; 7 - Four - way valve; 8 - Compressor; 9 - Gas - liquid separator. Detailed implementation mode

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0031] Embodiment 1:

[0032] This embodiment provides a constant temperature and humidity control method as shown in the attached Figure 1-2 drawing, which includes:

[0033] S1: Preset the set temperature T 设 , the set relative humidity φ 设 , the temperature change rate △T 设 , the humidity change rate △d 设 , the set time t, the running duration t1; Obtain the moisture content d of the set state according to T 设 and φ 设 ; 设 ;

[0034] S2: Detect the inlet air temperature T1 and the inlet air relative humidity φ1 of the air inlet, and obtain the inlet air moisture content d1 according to T1 and φ1; Calculate the temperature change rate: △T = T1 - T t ; The humidity change rate: △d = d1 - dt; T t is the temperature in the previous t seconds, d t is the humidity in the previous t seconds;

[0035] S3: Compare T1 and T 设 , △T and △T 设 , d1 and d 设 , △d and △d 设 to determine the indoor environmental conditions according to the magnitude relationship, and automatically adjust the size of the unit air damper, the opening degree of the electronic expansion valve in the heat exchanger, and the opening and closing of the humidifier to adjust the indoor temperature and humidity according to the indoor environmental conditions; Until d2 = d 设 or d3 = d 设 or the humidification amount d = d 设 and then continuously run for t1 time, and repeat step S2;

[0036] The heat exchanger includes a first heat exchanger and a second heat exchanger; d2 is the first moisture content obtained by detecting the first temperature T2 and the first relative humidity φ2 at the outlet of the first heat exchanger in real time; d3 is the second moisture content obtained by detecting the second temperature T3 and the second relative humidity φ3 at the outlet of the second heat exchanger in real time.

[0037] In this embodiment, the user-set temperature T is detected 设 and the relative humidity φ 设 , and the moisture content d in the set state can be obtained 设 ; the first temperature and humidity sensor is used to detect the inlet air temperature T1 and the relative humidity φ1 at the air inlet of the unit, and the moisture content d1 at that time in the air conditioning area (i.e., the indoor or indoor side area) can be obtained; the second temperature and humidity sensor is used to detect the temperature T2 and the relative humidity φ2 after the air flows through the first heat exchanger, and the corresponding moisture content d2 can be obtained; the third temperature and humidity sensor is used to detect the temperature T3 and the relative humidity φ3 after the air flows through the second heat exchanger, and the corresponding moisture content d3 can be obtained.

[0038] First, calculate the temperature change rate and the humidity change rate in the air conditioning area during a preset time period. The temperature change rate △T = T1 - T t , and the humidity change rate △d = d1 - d t , where T1 and d1 are the temperature and humidity in the air conditioning area detected in real time currently, that is, the temperature and humidity at the air inlet, and T t and d t are the temperature and humidity t seconds ago, and t is the preset time. Compare the user-set temperature and humidity, the temperature and humidity in the air conditioning area, and the temperature and humidity change rate in the air conditioning area with the preset temperature and humidity change rate to determine the temperature and humidity adjustment requirements in the air conditioning area.

[0039] The purpose of setting the continuous operation time of t1 is to avoid frequent adjustment of the unit, which may cause noise and shorten the service life of components. After the unit determines the adjustment state, it keeps running in this state for t1 time, and then cycles the above control program.

[0040] Embodiment 2:

[0041] This embodiment provides a constant temperature and humidity control method as shown in the appendix Figure 1-2 , which includes:

[0042] S1: Preset the set temperature T 设 , the set relative humidity φ 设 , the set temperature change rate △T 设 , the set humidity change rate △d 设 , the set time t, and the operation duration t1; according to T 设 and φ 设 obtain the moisture content d in the set state设 ;

[0043] S2: Detect the inlet air temperature T1 and the inlet air relative humidity φ1 of the air inlet, and obtain the moisture content d1 of the inlet air according to T1 and φ1; Calculate the temperature change rate: △T = T1 - T t ; Humidity change rate: △d = d1 - dt; T t is the temperature in the previous t seconds, d t is the humidity in the previous t seconds;

[0044] S3: Compare T1 and T 设 , △T and △T 设 , d1 and d 设 , △d and △d 设 to determine the indoor environmental conditions according to the magnitude relationship, and automatically adjust the size of the unit air damper, the opening degree of the electronic expansion valve in the heat exchanger and the opening and closing of the humidifier according to the indoor environmental conditions to adjust the indoor temperature and humidity; until d2 = d 设 or d3 = d 设 or the humidity addition d = d 设 and continue to run for t1 time, and repeat step S2;

[0045] The heat exchanger includes a first heat exchanger and a second heat exchanger; the d2 is the first moisture content obtained by detecting the first temperature T2 and the first relative humidity φ2 at the outlet of the first heat exchanger in real time; the d3 is the second moisture content obtained by detecting the second temperature T3 and the second relative humidity φ3 at the outlet of the second heat exchanger in real time.

[0046] The specific judgment method and adjustment method in step S3 are as follows:

[0047] In step S3, if T1 > T 设 and △T > △T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is a high temperature and high humidity environment at this time, and the indoor heat production and moisture production are large, and rapid cooling and dehumidification are required; at this time, automatically adjust the unit air damper to the high air damper, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger to a small opening degree, and keep the humidifier closed; until d3 = d 设 . Therefore, if T1 > T 设 and △T > △T 设 , d1 > d 设 and △d > △d 设, that is, when the foregoing conditions are simultaneously met, it is determined that the air-conditioned area is in a high-temperature and high-humidity environment at this time, and the heat and moisture production in the air-conditioned area are large. Rapid cooling and dehumidification are required. Since the unit is operating in the cooling mode at this time, the fan speed of the unit is automatically adjusted to the high fan speed to increase the air flow rate and velocity, enhance the heat exchange efficiency between the air and the heat exchanger. At the same time, the electronic expansion valves EXP1 and EXP2 are adjusted to a small opening degree, that is, the first electronic expansion valve of the first heat exchanger and the second electronic expansion valve of the second heat exchanger are both at a small opening degree, so as to reduce the surface temperature of the heat exchanger, increase the air dehumidification amount and heat exchange amount, and cool and dehumidify the air when it flows through the first heat exchanger and the second heat exchanger. The moisture content d3 of the dehumidified air = d 设 , and the temperature meets the requirements.

[0048] In step S3, if T1 > T 设 and △T > △T 设 , d1 > d 设 and △d < △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time. The indoor heat production is large but the moisture production is not large. Rapid cooling and a small amount of dehumidification are required; at this time, the fan speed of the unit is automatically adjusted to the high fan speed, the first electronic expansion valve in the first heat exchanger is at a small opening degree, the second electronic expansion valve in the second heat exchanger is at a large opening degree, and the humidifier remains closed; until d2 = d 设 . Therefore, if T1 > T 设 and △T > △T 设 , d1 > d 设 and △d < △d 设 , that is, when the foregoing conditions are simultaneously met, it is determined that the air-conditioned area is in a high-temperature and high-humidity environment at this time. The heat production in the air-conditioned area is large but the moisture production is not large. Rapid cooling and a small amount of dehumidification are required. Since the unit is operating in the cooling mode at this time, the fan speed of the unit is automatically adjusted to the high fan speed. At the same time, the electronic expansion valve EXP1 is adjusted to a small opening degree to cool and dehumidify the air. After dehumidification, d2 = d 设 , and the electronic expansion valve EXP2 is adjusted to a large opening degree, that is, the first electronic expansion valve in the first heat exchanger is adjusted to a small opening degree, and the second electronic expansion valve in the second heat exchanger is adjusted to a large opening degree to further cool the air without dehumidification, and the temperature after cooling meets the requirements.

[0049] In step S3, if T1 > T 设 and △T > △T 设 , d1 < d 设 , it is determined that the indoor environment is a high-temperature and dry environment at this time, and the indoor heat production is large. Rapid cooling and humidification are required; at this time, the fan speed of the unit is automatically adjusted to the high fan speed, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are at a large opening degree, and the humidifier is turned on; until d = d 设 -d1. Therefore, if T1 > T 设 and △T > △T 设 , d1 < d设 , that is, when the above conditions are met simultaneously, it is determined that the air-conditioned area is in a high-temperature and dry environment at this time, and the heat production in the air-conditioned area is large, so rapid cooling and humidification are required. Since the unit is operating in the cooling mode at this time, the air volume gear of the unit is automatically adjusted to the high gear, and at the same time, the electronic expansion valves EXP1 and EXP2 are adjusted to a large opening degree, that is, the first electronic expansion valve of the first heat exchanger and the second electronic expansion valve of the second heat exchanger are both adjusted to a large opening degree, so that the air is cooled without dehumidification when flowing through the first heat exchanger and the second heat exchanger, and the temperature after cooling meets the requirements. At the same time, the humidifier is turned on, and the humidification amount d = d 设 - d1.

[0050] In step S3, if T1 > T 设 and △T < △T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time. The indoor humidity production is large but the heat production is small, and rapid dehumidification and a small amount of cooling are required. At this time, the air volume gear of the unit is automatically adjusted to the medium gear, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are adjusted to a small opening degree, and the humidifier remains closed; until d3 = d 设 . Therefore, if T1 > T 设 and △T < △T 设 , d1 > d 设 and △d > △d 设 , that is, when the above conditions are met simultaneously, it is determined that the air-conditioned area is in a high-temperature and high-humidity environment at this time. The air-conditioned area has a large humidity production but a small heat production, and rapid dehumidification and a small amount of cooling are required. Since the unit is operating in the cooling mode at this time, the air volume gear of the unit is automatically adjusted to the medium gear, and at the same time, the electronic expansion valves EXP1 and EXP2 are adjusted to a small opening degree, that is, the first electronic expansion valve of the first heat exchanger and the second electronic expansion valve of the second heat exchanger are both adjusted to a small opening degree to cool and dehumidify the air. After dehumidification, the moisture content d3 of the air = d 设 , and the temperature meets the requirements.

[0051] In step S3, if T1 > T 设 and △T < △T 设 , d1 > d 设 and △d < △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, and both the heat production and humidity production in the room are small; at this time, the air volume gear of the unit is automatically adjusted to the medium gear, the first electronic expansion valve in the first heat exchanger is adjusted to a small opening degree, the second electronic expansion valve in the second heat exchanger is adjusted to a large opening degree, and the humidifier remains closed; until d2 = d 设 . Therefore, if T1 > T 设 and △T < △T 设 , d1 > d 设 and △d < △d 设, that is, after simultaneously meeting the above conditions, it is determined that the air-conditioned area is in a high-temperature and high-humidity environment at this time, and the heat and moisture production in the air-conditioned area are not large. Since the unit is operating in the cooling mode at this time, the fan speed of the unit is automatically adjusted to the medium speed, and at the same time, the electronic expansion valve EXP1 is adjusted to a small opening to cool and dehumidify the air. After dehumidification, d2 = d 设 , and the electronic expansion valve EXP2 is adjusted to a large opening, that is, the first electronic expansion valve in the first heat exchanger is adjusted to a small opening, and the second electronic expansion valve in the second heat exchanger is adjusted to a large opening, to further cool the air without dehumidifying it, and the temperature after cooling meets the requirements.

[0052] In step S3, if T1 > T 设 and △T < △T 设 , d1 < d 设 , it is determined that the indoor environment is high-temperature and dry at this time, and the heat production in the air-conditioned area is not large; at this time, the fan speed of the unit is automatically adjusted to the medium speed, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are adjusted to large openings, and the humidifier is turned on; until d = d 设 - d1. Therefore, if T1 > T 设 and △T < △T 设 , d1 < d 设 , that is, after simultaneously meeting the above conditions, it is determined that the air-conditioned area is in a high-temperature and dry environment at this time, and the heat production in the air-conditioned area is not large. Since the unit is operating in the cooling mode at this time, the fan speed of the unit is automatically adjusted to the medium speed, and at the same time, the electronic expansion valves EXP1 and EXP2 are adjusted to large openings, that is, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are both adjusted to large openings, so that the air is cooled without dehumidifying when flowing through the first heat exchanger and the second heat exchanger, and the temperature after cooling meets the requirements. At the same time, the humidifier is turned on, and the humidification amount d = d 设 - d1.

[0053] In step S3, if T1 < T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is low-temperature and high-humidity at this time, and the moisture production in the air-conditioned area is large, and rapid temperature rise and dehumidification are required; at this time, the fan speed of the unit is automatically adjusted to the high speed, the first electronic expansion valve in the first heat exchanger is adjusted to a small opening, the second electronic expansion valve in the second heat exchanger is adjusted to a large opening, and the humidifier remains closed; until d2 = d 设 . Therefore, if T1 < T 设 , d1 > d 设 and △d > △d 设, that is, when the above conditions are met simultaneously, it is determined that the air-conditioned area is in a low-temperature and high-humidity environment at this time, and the air-conditioned area has a large moisture production. It is necessary to quickly raise the temperature and dehumidify. Since the unit is operating in the cooling mode at this time, the air volume of the unit is automatically adjusted to the high air volume gear. At the same time, the electronic expansion valve EXP1 is adjusted to a small opening degree to cool and dehumidify the air. After dehumidification, d2 = d 设 , and the electronic expansion valve EXP2 is adjusted to a large opening degree, that is, the first electronic expansion valve of the first heat exchanger is adjusted to a small opening degree, and the second electronic expansion valve of the second heat exchanger is adjusted to a large opening degree. At this time, the second heat exchanger is part of the condenser of the air-conditioning system to heat the air, and the temperature of the heated air meets the requirements.

[0054] In step S3, if T1 < T 设 , d1 > d 设 and △d < △d 设 , it is determined that the indoor environment is a low-temperature and high-humidity environment at this time, but the moisture production in the air-conditioned area is not large; at this time, the air volume of the unit is automatically adjusted to the low air volume gear, the first electronic expansion valve in the first heat exchanger is adjusted to a small opening degree, the second electronic expansion valve in the second heat exchanger is adjusted to a large opening degree, and the humidifier remains closed; until d2 = d 设 . Therefore, if T1 < T 设 , d1 > d 设 and △d < △d 设 , that is, when the above conditions are met simultaneously, it is determined that the air-conditioned area is in a low-temperature and high-humidity environment at this time, but the moisture production in the air-conditioned area is not large. Since the unit is operating in the cooling mode at this time, the air volume of the unit is automatically adjusted to the low air volume gear. At the same time, the electronic expansion valve EXP1 is adjusted to a small opening degree to cool and dehumidify the air. After dehumidification, d2 = d 设 , and the electronic expansion valve EXP2 is adjusted to a large opening degree, that is, the first electronic expansion valve of the first heat exchanger is adjusted to a small opening degree, and the second electronic expansion valve of the second heat exchanger is adjusted to a large opening degree. At this time, the second heat exchanger is part of the condenser of the air-conditioning system to heat the air, and the temperature of the heated air meets the requirements.

[0055] As a further improvement of the present invention: in step S3, if T1 < T 设 , d1 < d 设 , it is determined that the indoor environment is a low-temperature and dry environment at this time, and it is necessary to raise the temperature and humidify; since the unit is operating in the heating mode at this time, the air volume of the unit is automatically adjusted to the high air volume gear, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are adjusted to a small opening degree, and the humidifier is turned on; until d = d 设 -d1. Therefore, if T1 < T 设 , d1 < d 设, that is, when the above conditions are met simultaneously, it is determined that the air-conditioned area is in a low-temperature and dry environment at this time, and heating and humidification are required. At this time, the unit operates in heating mode, the wind speed is automatically adjusted to high gear, and at the same time, the electronic expansion valves EXP1 and EXP2 are adjusted to a small opening degree, that is, the first electronic expansion valve of the first heat exchanger and the second electronic expansion valve of the second heat exchanger are both adjusted to a small opening degree, so as to increase the heat exchange temperature difference and heat exchange efficiency between the first heat exchanger and the second heat exchanger and the indoor air, and the humidifier is turned on, and the humidification amount d = d 设 - d1.

[0056] It should be noted that the small opening degree and large opening degree described for the opening degree of the electronic expansion valve (including the first electronic expansion valve and the second electronic expansion valve) in the present invention are relative. For example, when the unit operates in cooling mode, when the opening degree of the electronic expansion valve is less than the opening degree 1, the heat exchanger is in a cooling state and the surface temperature of the heat exchanger is lower than the dew point temperature of the air flowing through the heat exchanger, and the air can be cooled and dehumidified; when the opening degree of the electronic expansion valve is greater than the opening degree 1 and less than the opening degree 2, the heat exchanger is in a cooling state and the surface temperature of the heat exchanger is higher than the dew point temperature of the air flowing through the heat exchanger, and the air can be cooled but not dehumidified; when the opening degree of the electronic expansion valve is greater than the opening degree 2, the heat exchanger is equivalent to a part of the condenser of the unit, and the air can be heated and raised in temperature. Another example is that when the unit operates in heating mode, both the first heat exchanger 1 and the second heat exchanger 2 are in a heating state. The opening degree of the electronic expansion valve affects the heat exchange temperature and heat exchange amount between the heat exchanger and the flowing air. When the opening degree of the electronic expansion valve is a small opening degree, the refrigerant pressure and temperature in the heat exchanger increase, the heat exchange temperature difference between the heat exchanger and the flowing air is large, and the heat exchange amount is large. When the opening degree of the electronic expansion valve is a large opening degree, the refrigerant pressure and temperature in the heat exchanger are lower than those in the small opening degree, and at this time, the heat exchange temperature difference and heat exchange amount are also lower than those in the small opening degree.

[0057] The air in the present invention first enters through the air inlet, first enters the first heat exchanger and then comes out, then enters the second heat exchanger and then comes out, and finally enters the room.

[0058] Embodiment 3:

[0059] First, in the prior art, as shown in the appendix Figure 3As shown in the figure, in the prior art, a heat exchanger 10, an electric heater 101, and an indoor humidifier 102 are provided on the indoor side 1-1. The heat exchanger 103 is connected to an electronic expansion valve 104. An outdoor stop valve 110 connected to the heat exchanger is provided on the outdoor side 1-2. The stop valve is further connected to an outdoor heat exchanger 106, an outdoor four-way valve 107, an outdoor compressor 108, and an outdoor gas-liquid separator 109 on the outdoor side 1-2. Detection and adjustment are performed by providing a sensor 105 on the heat exchanger, and further adjustment is performed with the assistance of the electric heater and the indoor humidifier. This results in problems such as cold and heat offset, dehumidification and humidification offset, and serious energy waste. Moreover, multiple feedback adjustments are required during the control process, making the process of stabilizing temperature and humidity adjustment long and the control accuracy low.

[0060] However, this embodiment provides a constant temperature and humidity control device as shown in the attached Figure 2 figure. Among them, applying the constant temperature and humidity control method described in any of the above embodiments, it is characterized in that it includes a first heat exchanger 1, a second heat exchanger 2, and a humidifier 3 provided on the indoor side 1-1. The first heat exchanger 1 is arranged between the air inlet of the air conditioner and the second heat exchanger 2. The first heat exchanger 1 is connected to a first electronic expansion valve 11, and the second heat exchanger 2 is connected to a second electronic expansion valve 21. It further includes a first temperature and humidity sensor 4, a second temperature and humidity sensor 12, and a third temperature and humidity sensor 22. The first temperature and humidity sensor 4 is arranged at the air inlet, the second temperature and humidity sensor 12 is arranged at the air outlet of the first heat exchanger 1, and the third temperature and humidity sensor 22 is arranged at the air outlet of the second heat exchanger 2.

[0061] In this embodiment, it further includes a stop valve 5, a third heat exchanger 6, a four-way valve 7, a compressor 8, and a gas-liquid separator 9 provided on the outdoor side 1-2. The stop valve is connected to the first heat exchanger and the second heat exchanger on the indoor side 1-1. The stop valve is connected to the third heat exchanger, the four-way valve, the compressor, and the gas-liquid separator. The third heat exchanger is connected to the four-way valve, the four-way valve is connected to the compressor, and the compressor is connected to the gas-liquid separator.

[0062] In this embodiment, an air-conditioning heat pump is used to replace the electric heater for temperature adjustment to reduce energy consumption. The moisture content is used as the humidity control index for precise control. The change rates of temperature and humidity are monitored by the first temperature and humidity sensor, the second temperature and humidity sensor, and the third temperature and humidity sensor, and the air volume and heat exchange are adjusted comprehensively to quickly respond to the demand.

[0063] The main function of the present invention: To solve the problems of large energy waste, long adjustment process, and low adjustment accuracy of existing constant temperature and humidity units, a constant temperature and humidity control method and device are proposed. The system diagram of the device is as shown in the attached Figure 2, an air-conditioning heat pump system is adopted for temperature and humidity regulation. Its heat exchanger includes a first heat exchanger and a second heat exchanger. Electronic expansion valves EXP1 and EXP2 are connected to the front ends of both heat exchangers, which can adjust the surface temperature and heat exchange capacity of the heat exchanger, control the dehumidification amount and temperature control of the heat exchanger for air. Temperature and humidity sensors are arranged at both the inlet and outlet of the heat exchanger, which can detect the temperature and relative humidity at the corresponding positions. The moisture content can be obtained by querying the psychrometric chart of moist air. According to the detection results, the corresponding temperature and humidity change rates are calculated, and the set temperature and humidity of the user and the environmental temperature and humidity in the air-conditioning area are compared, as well as the temperature and humidity change rates in the air-conditioning area and the preset temperature and humidity change rates, to judge the temperature and humidity regulation requirements in the air-conditioning area, so as to adjust the indoor temperature and humidity in real time and meet the user's requirements for the indoor environmental temperature and humidity.

[0064] In summary, after reading the present invention document, those of ordinary skill in the art can make various other corresponding transformation schemes without creative mental labor according to the technical solutions and technical concepts of the present invention, and all of them fall within the scope protected by the present invention.

Claims

1. A constant temperature and humidity control method, characterized in that, Comprising: S1: Preset the set temperature T 设 , the set relative humidity φ 设 , the set temperature change rate △T 设 , the set humidity change rate △d 设 , the set time t, the running duration t1; According to T 设 and φ 设 obtain the moisture content d in the set state 设 ; S2: Detect the inlet air temperature T1 and the inlet air relative humidity φ1 at the air inlet, and obtain the moisture content d1 of the inlet air based on T1 and φ1; calculate the temperature change rate: ΔT = T1 - T t ; the humidity change rate: Δd = d1 - dt; T t is the temperature in the previous t seconds, d t is the humidity in the previous t seconds; S3: Compare T1 and T 设 , △T and △T 设 , d1 and d 设 , △d and △d 设 to determine the indoor environmental conditions based on the magnitude relationship, and automatically adjust the size of the unit's air damper, the opening of the electronic expansion valve in the heat exchanger, and the opening and closing of the humidifier to adjust the indoor temperature and humidity according to the indoor environmental conditions; until d2 = d 设 or d3 = d 设 or the humidification amount d = d 设 and then continuously operate for a time t1, and repeat step S2; The heat exchanger includes a first heat exchanger and a second heat exchanger, and the first heat exchanger and the second heat exchanger are arranged in parallel on the indoor side; the first heat exchanger is arranged between the air inlet of the air conditioner and the second heat exchanger, the first heat exchanger is connected with a first electronic expansion valve, and the second heat exchanger is connected with a second electronic expansion valve; d2 is the first moisture content obtained by detecting the first temperature T2 and the first relative humidity φ2 at the outlet of the first heat exchanger in real time; d3 is the second moisture content obtained by detecting the second temperature T3 and the second relative humidity φ3 at the outlet of the second heat exchanger in real time.

2. The constant temperature and humidity control method according to claim 1, characterized in that, In step S3, if T1 > T 设 and △T > △T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, and the indoor heat and moisture production are large, and rapid cooling and dehumidification are required; at this time, the air volume of the unit is automatically adjusted to the high air volume, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are in a small opening degree, and the humidifier remains closed; until d3 = d 设 .

3. A constant temperature and humidity control method according to claim 1, characterized in that, In step S3, if T1 > T 设 and △T > △T 设 , d1 > d 设 and △d < △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, with a large amount of heat production but a small amount of moisture production indoors. It is necessary to quickly cool down and dehumidify slightly. At this time, the air volume of the unit is automatically adjusted to the high air volume, the first electronic expansion valve in the first heat exchanger is at a small opening degree, the second electronic expansion valve in the second heat exchanger is at a large opening degree, and the humidifier remains closed; until d2 = d 设 .

4. A constant temperature and humidity control method according to claim 1, characterized in that, In step S3, if T1 > T 设 and △T > △T 设 , d1 < d 设 , it is determined that the indoor environment is a high-temperature and dry environment at this time, and the indoor heat production is large, so rapid cooling and humidification are required; at this time, the air volume of the unit is automatically adjusted to the high air volume, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are fully opened, and the humidifier is turned on; until d = d 设 - d1.

5. A constant temperature and humidity control method according to claim 1, characterized in that, In step S3, if T1 > T 设 and △T < △T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, with a large amount of moisture production but little heat production indoors. It is necessary to quickly dehumidify and slightly cool down. At this time, the air volume of the unit is automatically adjusted to the medium air volume, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are at a small opening degree, and the humidifier remains closed; until d3 = d 设 .

6. A constant temperature and humidity control method according to claim 1, characterized in that, In step S3, if T1 > T 设 and △T < △T 设 , d1 > d 设 and △d < △d 设 , it is determined that the indoor environment is a high-temperature and high-humidity environment at this time, and the indoor heat production and moisture production are not large; at this time, the air volume of the unit is automatically adjusted to the medium air volume, the first electronic expansion valve in the first heat exchanger is at a small opening, the second electronic expansion valve in the second heat exchanger is at a large opening, and the humidifier remains closed; until d2 = d 设 .

7. A constant temperature and humidity control method according to claim 1, characterized in that, In step S3, if T1 > T 设 and △T < △T 设 , d1 < d 设 , it is determined that the indoor environment is a high-temperature and dry environment at this time, and the heat production in the air-conditioned area is not large; at this time, the fan speed of the unit is automatically adjusted to the medium speed, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger are fully opened, and the humidifier is turned on; until d = d 设 - d1.

8. A constant temperature and humidity control method according to claim 1, characterized in that In step S3, if T1 < T 设 , d1 > d 设 and △d > △d 设 , it is determined that the indoor environment is a low-temperature and high-humidity environment at this time, and the air-conditioning area has a large amount of moisture production, and rapid heating and dehumidification are required; at this time, the unit air volume is automatically adjusted to the high air volume, the first electronic expansion valve in the first heat exchanger is at a small opening degree, the second electronic expansion valve in the second heat exchanger is at a large opening degree, and the humidifier remains closed; until d2 = d 设 ; In step S3, if T1 < T 设 , d1 > d 设 and △d < △d 设 , it is determined that the indoor environment is a low-temperature and high-humidity environment at this time, but the moisture production in the air-conditioned area is not large; at this time, the air volume of the unit is automatically adjusted to the low air volume, the first electronic expansion valve in the first heat exchanger is at a small opening degree, the second electronic expansion valve in the second heat exchanger is at a large opening degree, and the humidifier remains closed; until d2 = d 设 .

9. A constant temperature and humidity control method according to claim 1, characterized in that In step S3, if T1 < T 设 , d1 < d 设 , it is determined that the indoor environment is a low-temperature and dry environment at this time, and heating and humidification are required; at this time, the unit operates in the heating mode, and automatically adjusts the unit's air duct to the high air duct, the first electronic expansion valve in the first heat exchanger and the second electronic expansion valve in the second heat exchanger to a small opening, and the humidifier is turned on; until d = d 设 - d1.

10. A constant temperature and humidity control device, characterized in that, Applying the constant temperature and humidity control method according to any one of claims 1-9 above, characterized in that it includes a first heat exchanger, a second heat exchanger and a humidifier arranged on the indoor side; the first heat exchanger is arranged between the air inlet of the air conditioner and the second heat exchanger, the first heat exchanger is connected with a first electronic expansion valve, and the second heat exchanger is connected with a second electronic expansion valve; it further includes a first temperature and humidity sensor, a second temperature and humidity sensor and a third temperature and humidity sensor; the first temperature and humidity sensor is arranged at the air inlet, the second temperature and humidity sensor is arranged at the air outlet of the first heat exchanger, and the third temperature and humidity sensor is arranged at the air outlet of the second heat exchanger.

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