CN216667811U - Constant temperature and humidity air conditioning equipment for cooling and dehumidifying by utilizing bypass device - Google Patents
Constant temperature and humidity air conditioning equipment for cooling and dehumidifying by utilizing bypass device Download PDFInfo
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- CN216667811U CN216667811U CN202121010309.0U CN202121010309U CN216667811U CN 216667811 U CN216667811 U CN 216667811U CN 202121010309 U CN202121010309 U CN 202121010309U CN 216667811 U CN216667811 U CN 216667811U
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Abstract
The utility model relates to a constant temperature and humidity air conditioning equipment for cooling and dehumidifying by a bypass device, which comprises: a ventilation tank and a refrigerant circulation circuit; an evaporator coil, a humidifier, a heater, an auxiliary electric heater and a blower are sequentially arranged in the ventilation box from the air return inlet to the air supply inlet; the air return inlet is communicated with the air supply outlet through an air circulation bypass device; the air circulation bypass device comprises a shunting air channel and a cooling air channel; the split air channel and the cooling air channel are isolated from each other; the split air passage and the cooling air passage are respectively provided with an air flow adjusting device. The utility model utilizes the bypass device to cool and dehumidify the constant temperature and humidity air conditioning equipment, utilizes the bypass device to make a part of air flow through the evaporator coil to cool and dehumidify, and the other part of air does not participate in cooling and dehumidifying and heats the cooled and dehumidified air through mixing, thereby reducing the heating compensation power consumption and obviously saving energy; the air conditioner can realize small enthalpy difference air supply and has high control precision.
Description
Technical Field
The utility model relates to air conditioning equipment, in particular to constant-temperature and constant-humidity air conditioning equipment for cooling and dehumidifying by utilizing a bypass device.
Background
In the prior art, the cooling and dehumidifying process of the high-precision constant-temperature and constant-humidity air conditioner comprises the following steps: in the process that all return air of the air conditioner flows through the evaporator coil pipe/the chilled water coil pipe, the refrigerating capacity of the unit is increased by increasing the flow of the refrigerant of the generator coil pipe/the chilled water coil pipe so as to realize cooling; the temperature of the air is reduced to be below the temperature of the saturated state of the humidity by further reducing the circulating air quantity of the air conditioner or improving the refrigerating capacity of the air conditioner, and redundant water vapor in the air is condensed into liquid water on the surface of the evaporator and is discharged out of the system through a water collecting disc and a water discharging channel; and then the temperature is raised to the target temperature through the air conditioner reheating, and the air supply humidity is reduced. The defects in the prior art are as follows: the air supply quantity of the air conditioner is reduced, dehumidification is carried out, small air quantity and large enthalpy difference air supply of the air conditioner are caused, the temperature and humidity control precision of the air conditioner is reduced, the thermal compensation load is large, and the energy consumption of the air conditioner is large; the air volume is large, the enthalpy difference is small, the control precision of the air conditioner can be improved, and the heat compensation load of the air conditioner in a dehumidification state is further increased.
In the traditional high-precision constant-temperature and constant-humidity air conditioning equipment, the temperature and humidity change caused by comprehensive elements except the air conditioner has the characteristics of gradual change and periodicity; the air conditioner has the characteristic of hysteresis in temperature and humidity regulation; the hysteresis of gradual change regulation of the air conditioner can be weakened through PID control, the gradual change and periodicity of the environment can be better synchronized, and the environment can reach high temperature and humidity stability.
The air conditioner control system reduces the air supply quantity of the air conditioner through gradual change to dehumidify, although the temperature and humidity are not suddenly changed, the temperature difference between the air supply and the return air of the air conditioner is increased due to the reduction of the wind speed, the temperature and humidity fluctuation is easy to be overlarge, and the control precision is reduced.
The dehumidification is realized by improving the refrigerating capacity of the air conditioner, the refrigerating capacity of the air conditioner is improved through gradual change by the air conditioner control system, the sudden change of the temperature and the humidity is not caused, the excessive refrigerating capacity is provided by the air conditioner refrigerating system, the temperature is raised and the humidity is reduced by reheating the air conditioner, a large amount of energy consumption is consumed, and especially when the requirement on controlling the environmental humidity by the air conditioner is low, the energy consumption of the air conditioner is higher. Therefore, there is a need for a constant temperature and humidity air conditioner with a novel cooling and dehumidifying device to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides the constant-temperature and constant-humidity air conditioning equipment which has low operation cost, realizes large air quantity, small enthalpy difference and high-precision temperature and humidity control of the air conditioner and utilizes the bypass device to reduce the temperature and dehumidify.
The technical scheme adopted by the utility model is as follows:
a constant temperature and humidity air conditioning equipment utilizing a bypass device to cool and dehumidify comprises: a ventilation box and a refrigeration cycle loop;
the ventilation box is provided with an air return inlet and an air supply outlet;
an evaporator coil, a humidifier, a heater, an auxiliary electric heater and a blower are sequentially arranged in the ventilation box from the air return inlet to the air supply inlet;
the air return inlet and the air supply outlet are respectively communicated with the target space;
the water collecting tray is positioned at the lower part of the evaporator coil;
an air circulation bypass device is arranged in the ventilation box;
the air return inlet is communicated with the air supply outlet through an air circulation bypass device;
the air circulation bypass device comprises a shunting air channel and a cooling air channel;
the split air channel and the cooling air channel are isolated from each other;
the shunting air channel is provided with an air flow adjusting device which is a bypass proportional air valve (such as a proportional air valve and a variable frequency fan);
the cooling air channel is provided with an air flow adjusting device which is a coil pipe proportional air valve (such as a proportional air valve and a variable frequency fan);
an evaporator coil is disposed in the cooling air passage.
The refrigerant circulation circuit includes: the system comprises a compressor, an air-cooled condenser, a dry filter, a liquid mirror, a throttling device and an evaporator coil;
the evaporator coil is connected with an external water chilling unit to form a refrigerant circulating loop.
A constant temperature and humidity air conditioning equipment for cooling and dehumidifying by utilizing a bypass device comprises: a ventilation tank and a refrigerant circulation circuit;
the ventilation box is provided with an air return inlet and an air supply outlet;
an evaporator coil, a humidifier, a heater, an auxiliary electric heater and a blower are sequentially arranged in the ventilation box from the air return inlet to the air supply inlet;
the air return inlet and the air supply outlet are respectively communicated with the target space;
the water collecting tray is positioned at the lower part of the evaporator coil;
the ventilation case includes: a mixing primary region, a surface cooling region, a heating region, a humidifying region, a fan region and an auxiliary heating region;
the heating area is provided with a heater;
the humidifying area is provided with a humidifier;
the fan area is provided with a fan;
the auxiliary heating area is provided with an auxiliary electric heater,
the surface cooling area comprises a flow dividing air channel and a cooling air channel;
the split air channel and the cooling air channel are isolated from each other;
the shunting air channel is provided with a bypass proportional air valve;
the cooling air channel is provided with a coil pipe proportional air valve;
an evaporator coil is disposed within the cooling air passage.
Return air to the air conditioner flows partially through the evaporator coil and partially not.
When the air passes through the air circulation bypass device, one part of the air passes through the evaporator coil through the cooling air channel, and the other part of the air passes through the diversion air channel and then is mixed with the air passing through the evaporator coil;
when a large-air-volume constant-temperature constant-humidity air conditioner dehumidifies, the air conditioner dehumidifies by partially dehumidifying air, and low-power constant-temperature dehumidification is realized;
when a large-air-volume constant-temperature and constant-humidity air conditioner cools, the air outlet temperature of the air conditioner is reduced through partial air cooling, so that the air conditioner cools; and then the constant temperature and humidity of the target space are realized through humidification and heating treatment.
The constant-temperature and constant-humidity air conditioning equipment for cooling and dehumidifying by utilizing the bypass device is suitable for a high-precision air-cooled constant-temperature and constant-humidity air conditioner and a high-precision chilled water type constant-temperature and constant-humidity air conditioner.
The air circulation bypass device enables air flowing through the air conditioner to flow through the evaporator coil, one part of the air flows through the evaporator coil, the other part of the air does not flow through the evaporator coil, the two parts of air are mixed after passing through the air circulation bypass device to realize cooling and dehumidification of the air, a water collecting disc is arranged below the evaporator coil, and the air is sent into a target space through a blower after being humidified and heated.
The refrigeration control steps are as follows:
a) cooling by an air conditioner: the control system increases the flow of the throttling device refrigerant/chilled water step by step; meanwhile, the opening degree of a coil air valve is increased, the opening degree of a bypass air valve is reduced or the frequency of a variable frequency fan is increased, the temperature of air passing through the coil is kept to be smaller than the set value of dehumidification dew point temperature, an air supply fan of the air conditioner keeps constant output, and the air quantity flowing through the coil is continuously regulated and controlled;
the temperature of the outlet air flowing through the coil is always ensured to be less than (usually, 0.1-0.5 ℃ is selected, and the temperature is set according to the humidity control precision requirement and cold air ratio configuration of the air conditioner) the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space;
after flowing through the bypass device, the air is thermally regulated by the auxiliary electric heater to the air supply temperature required by the system and then is sent into a target space;
b) heating an air conditioner:
the control system reduces the refrigerant/chilled water flow rate by adjusting the air flow regulating device; meanwhile, the opening degree of the coil air valve is reduced, the opening degree of a bypass air valve is increased or the frequency of a variable frequency fan is reduced, the constant output of an air supply fan of the air conditioner is kept, and the air quantity flowing through the coil is continuously regulated and controlled;
the temperature of the outlet air flowing through the coil is always ensured to be less than (usually, 0.1-0.5 ℃ is selected, and the temperature is set according to the humidity control precision requirement and cold air ratio configuration of the air conditioner) the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space;
after flowing through the bypass device, the air is thermally regulated by the auxiliary electric heater to the air supply temperature required by the system and then is sent into the target space.
The dehumidification control steps are as follows:
a) cooling by an air conditioner:
the control system increases the flow of the refrigerant/chilled water by adjusting the air flow adjusting device; meanwhile, the opening degree of the coil air valve is increased, the opening degree of a bypass air valve is reduced or the frequency of a variable frequency fan is increased, the constant output of an air supply fan of the air conditioner is kept, and the air quantity flowing through the coil is continuously regulated and controlled;
the temperature of the outlet air flowing through the coil is always ensured to be less than (1-5 ℃ is usually selected, and is adjusted according to the humidity control precision requirement of an air conditioner and the cold air ratio configuration, meanwhile, the temperature of the coil is kept to be higher than 0 ℃, when the temperature of the coil is close to 0 ℃, the opening degree of an air valve or the adjusting speed of a fan is increased, and the coil is prevented from being frozen), the temperature of the saturated humidity corresponding to the absolute moisture content required by the air of a target space is controlled, and after the temperature of the saturated humidity flows through a bypass device, the temperature is adjusted by an auxiliary electric heater until the system requires the air supply temperature, and then the temperature is sent into the target space;
b) heating an air conditioner:
the control system regulates the device refrigerant/chilled water flow rate by gradually decreasing the airflow; meanwhile, the opening degree of the coil air valve is reduced, the opening degree of a bypass air valve is increased or the frequency of a variable frequency fan is reduced, the constant output of an air supply fan of the air conditioner is kept, and the air quantity flowing through the coil is continuously regulated and controlled;
the temperature of the outlet air flowing through the coil is always ensured to be lower than (1-5 ℃ is usually selected, and adjustment is carried out according to the humidity control precision requirement of the air conditioner and the cold air ratio configuration) the temperature of the saturated humidity corresponding to the absolute humidity content required by the air in the control target space; after flowing through the bypass device, the air is thermally regulated by the auxiliary electric heater to the air supply temperature required by the system and then is sent into the target space.
The humidifying state control steps are as follows:
a) when the outlet air temperature of the coil pipe is lower than the temperature of the saturation humidity corresponding to the absolute moisture content required by the air of the control target space, the opening degree of an air valve of the coil pipe is increased, the opening degree of a bypass air valve is reduced or the frequency of a variable frequency fan is increased, the outlet air temperature of the coil pipe is increased to avoid dehumidification, and an air supply fan of the air conditioner keeps constant output;
the temperature of the outlet air flowing through the coil is always ensured to be larger than (0.1-2 ℃ is usually selected, and adjustment is carried out according to the humidity control precision requirement and cold air ratio configuration of the air conditioner) the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space; after flowing through the bypass device, the air is humidified by a humidifier and thermally regulated by an auxiliary electric adder until the air supply temperature required by the system is reached, and then the air is sent into a target space;
b) when the outlet air temperature of the coil is higher than the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space, the outlet air temperature flowing through the coil is always ensured to be higher than (usually, 0.1-2 ℃ is selected, and adjustment is carried out according to the humidity control precision requirement of the air conditioner and the cold air ratio configuration) the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space;
when the air humidity of the target space is higher and the electric heating compensation power output is more than 5 percent (usually 5 to 10 percent, the accurate temperature regulation is ensured to be effective), an air flow adjusting device (usually an air valve with an electric proportional-integral adjusting device or a variable frequency fan and the like) of the air circulation bypass adjusting device is adjusted to reduce the opening degree of the air valve or the rotating speed of the fan, the air quantity passing through the coil is continuously adjusted, meanwhile, a control system needs to set an adjusting proportion and an adjusting period (the adjusting proportion is usually not more than 2 percent, the adjusting period is not more than 120 seconds, the adjusting proportion is smaller as the control requirement is higher, the adjusting amplitude is smaller and the adjusting period is shorter, meanwhile, the temperature of the air-cooled coil is detected, when the temperature of the coil is close to 0 ℃, the air quantity passing through the coil is increased and is adjusted 5. a throttling device increases the flow of refrigerant/freezing water, and keeps the temperature of the coil to be higher than 0 ℃ to avoid the icing of the coil.
The large fluctuation of the coil outlet air temperature is avoided, the continuity of the coil outlet air temperature is realized, the coil outlet air temperature is lower than the temperature of the saturation humidity corresponding to the absolute moisture content required by the control target space air, and the dehumidification of the target environment is realized.
When the air humidity of the target space is higher and the electric heating compensation power output is less than or equal to 5 percent (usually 5 percent, ensuring accurate temperature adjustment to be effective), an air flow adjusting device (usually an air valve or a variable frequency fan with an electric proportional-integral adjusting function) for increasing the flow of refrigerant/chilled water through an adjusting throttling device, increasing the refrigerating capacity and adjusting an air circulation bypass device reduces the air quantity passing through a coil pipe through reducing the opening degree of the air valve or the rotating speed of the fan and continuously adjusting, and meanwhile, a control system needs to set an adjusting proportion and an adjusting period (usually, the adjusting proportion is not more than 2%, the adjusting period is not more than 120 seconds, the higher the control requirement is, the smaller the adjusting proportion is, the smaller the adjusting amplitude is and the shorter the adjusting period is, and simultaneously, the temperature of an air-cooled coil pipe is detected, when the temperature of the coil pipe is close to 0 ℃, the air quantity passing through the coil pipe is increased, the temperature of the coil pipe is kept to be higher than 0 ℃, and the coil pipe is prevented from being frozen).
The large fluctuation of the coil outlet air temperature is avoided, the continuity of the coil outlet air temperature is realized, the coil outlet air temperature is lower than the temperature of saturated humidity corresponding to the absolute moisture content required by the control target space air, and the dehumidification of the target environment is realized;
then the air flowing through the coil pipe air inlet channel is mixed with the air flowing through the bypass channel, and then the temperature is adjusted through electric heating, and the air is sent out of the case after reaching the temperature and humidity requirements of the air supply of the air conditioner, so as to meet the requirements of the temperature and the humidity of the target space.
The air conditioning control system manages devices such as an air circulation bypass device, refrigeration, heat exchange, heating, humidification and air supply, and the sensors for pressure, temperature, humidity and the like of air flow of the air conditioning system collect, so that the temperature and humidity of a control target space are controlled.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model relates to a constant temperature and humidity air conditioning device which utilizes a bypass device to cool and dehumidify, wherein the bypass device is used for enabling one part of air to flow through an evaporator coil to cool and dehumidify, and the other part of air does not participate in cooling and dehumidifying and heats the cooled and dehumidified air through mixing, so that the heating compensation power consumption is reduced, and the energy saving is remarkable. The utility model can realize the air supply of the air conditioner with small enthalpy difference and has high control precision.
The utility model utilizes the constant temperature and humidity air conditioning equipment of the cooling dehumidification of the bypass device, adopts the air valve with electric proportional-integral regulation or the frequency conversion fan to continuously regulate the air quantity passing through the evaporator coil, and has convenient installation, simple control and lower manufacturing cost; the application range is wide, and the air conditioner can be widely applied to various high-precision constant-temperature constant-humidity precise air conditioners.
Drawings
FIG. 1 is a schematic diagram of an air-cooled side view of a constant temperature and humidity air conditioning apparatus using a bypass device to reduce temperature and dehumidify;
FIG. 2 is a schematic diagram of a chilled water side view of a constant temperature and humidity air conditioning system using a bypass device to reduce temperature and dehumidify;
FIG. 3 is a schematic diagram of the air-cooling type of the constant temperature and humidity air conditioning equipment using the bypass device to cool and dehumidify;
FIG. 4 is a schematic diagram of the chilled water type of the constant temperature and humidity air conditioning equipment using the bypass device to reduce temperature and dehumidify.
In the drawings, the main parts are illustrated by symbols:
in the figure:
1. compressor 2, air-cooled condenser
3. Liquid storage tank 4 and liquid mirror
5. Throttling device 6, evaporator coil
7. Water collecting tray 8 and humidifier
9. Heater 10, auxiliary electric heater
11. Air circulation bypass device 12 and ventilation box
13. Blower 14 and condensing fan
15. Air supply outlet 16 and air return outlet
17. Fresh air inlet 18 and fresh air guide plate
19. Room temperature and humidity sensor
20. Air supply temperature and humidity sensor
41. Condensed water drainage
42. The humidifier supplies water.
Detailed Description
The utility model is described in detail below with reference to the figures and examples:
as can be seen from fig. 1 to 4, a constant temperature and humidity air conditioning device using a bypass device for cooling and dehumidifying includes: a ventilation tank and a refrigerant circulation circuit;
the ventilation box is provided with an air return inlet 16 and an air supply outlet 15;
an evaporator coil 6, a humidifier 8, a heater 9, an auxiliary electric heater 10 and a blower 13 are sequentially arranged in the ventilation box 12 from a return air inlet 16 to an air inlet 15;
the air return inlet 16 and the air supply outlet 15 are respectively communicated with the target space;
the water collection pan 7 is located in the lower portion of the evaporator coil 6;
an air circulation bypass device 11 is arranged in the ventilation box;
the air return opening 16 is communicated with the air supply opening 15 through an air circulation bypass device 11;
the air circulation bypass device includes a split air passage 111 and a cooling air passage 112;
the split air channel and the cooling air channel are isolated from each other;
the shunting air channel is provided with a shunting airflow adjusting device which is a bypass proportional air valve 113;
the cooling air channel is provided with a cooling air flow adjusting device which is a coil proportional air valve 114;
the cooling air channel is provided with a cooling air flow adjusting device, which is a variable frequency fan 115;
an evaporator coil is disposed within the cooling air passage.
The refrigerant circulation circuit includes: the system comprises a compressor 1, an air-cooled condenser 2, a drying filter 3, a liquid mirror 4, a throttling device 5 and an evaporator coil 6; the compressor is arranged in the air supply box or the condenser.
The evaporator coil is connected with an external water chilling unit to form a refrigerant circulating loop.
A constant temperature and humidity air conditioning equipment for cooling and dehumidifying by utilizing a bypass device comprises: a ventilation tank and a refrigerant circulation circuit;
the ventilation box is provided with an air return inlet 16 and an air supply outlet 15;
an evaporator coil 6, a humidifier 8, a heater 9, an auxiliary electric heater 10 and a blower 13 are sequentially arranged in the ventilation box 12 from a return air inlet 16 to an air inlet 15;
the air return inlet 16 and the air supply outlet 15 are respectively communicated with the target space;
the water collection pan 7 is located in the lower portion of the evaporator coil 6;
the ventilation box 12 includes therein: a primary mixing region 31, a surface cooling region 32, a heating region 33, a humidifying region 34, a fan region 35 and an auxiliary heating region 36;
the heating area is provided with a heater;
the humidifying area is provided with a humidifier;
the blower area is provided with a blower;
the auxiliary heating area is provided with an auxiliary electric heater,
the surface cooling area comprises a flow dividing air channel and a cooling air channel;
the split air channel and the cooling air channel are isolated from each other;
the shunting air channel is provided with a bypass proportional air valve;
the cooling air channel is provided with a coil pipe proportional air valve;
an evaporator coil is disposed within the cooling air passage.
Return air to the air conditioner flows partially through the evaporator coil and partially not.
When the air passes through the air circulation bypass device, one part of the air passes through the evaporator coil through the cooling air channel, and the other part of the air passes through the diversion air channel and then is mixed with the air passing through the evaporator coil;
when a large-air-volume constant-temperature constant-humidity air conditioner dehumidifies, the air conditioner dehumidifies by partially dehumidifying air, and low-power constant-temperature dehumidification is realized;
when a large-air-volume constant-temperature and constant-humidity air conditioner cools, the air outlet temperature of the air conditioner is reduced through partial air cooling, so that the air conditioner cools; and then the constant temperature and humidity of the target space are realized through humidification and heating treatment.
The constant-temperature and constant-humidity air conditioning equipment for cooling and dehumidifying by utilizing the bypass device is suitable for a high-precision air-cooled constant-temperature and constant-humidity air conditioner and a high-precision chilled water type constant-temperature and constant-humidity air conditioner.
The air circulation bypass device enables air flowing through the air conditioner to flow through the evaporator coil, one part of the air flows through the evaporator coil, the other part of the air does not flow through the evaporator coil, the two parts of air are mixed after passing through the air circulation bypass device to realize cooling and dehumidification of the air, a water collecting disc is arranged below the evaporator coil, and the air is sent into a target space through a blower after being humidified and heated.
The refrigeration control steps are as follows:
a) cooling by an air conditioner: the control system increases the throttle device refrigerant/chilled water flow in steps; meanwhile, the opening degree of a coil air valve is increased, the opening degree of a bypass air valve is reduced or the frequency of a variable frequency fan is increased, the temperature of air passing through the coil is kept to be not higher than the set value of dehumidification dew point temperature, the air supply fan of the air conditioner keeps constant output, and the air quantity flowing through the coil is continuously regulated and controlled;
the temperature of the outlet air flowing through the coil is always ensured to be lower than (usually, 0.1-0.5 ℃ is selected, and the temperature is set according to the humidity control precision requirement and cold air ratio configuration of an air conditioner) the temperature of saturated humidity corresponding to the absolute moisture content required by the air in the control target space;
after flowing through the bypass device, the air is thermally regulated by the auxiliary electric heater to the air supply temperature required by the system and then is sent into a target space;
b) heating an air conditioner:
the control system reduces the refrigerant/chilled water flow rate by adjusting the air flow regulating device; meanwhile, the opening degree of the coil air valve is reduced, the opening degree of a bypass air valve is increased or the frequency of a variable frequency fan is reduced, the constant output of an air supply fan of the air conditioner is kept, and the air quantity flowing through the coil is continuously regulated and controlled;
the temperature of the outlet air flowing through the coil is always ensured to be less than (usually, 0.1-0.5 ℃ is selected, and the temperature is set according to the humidity control precision requirement and cold air ratio configuration of the air conditioner) the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space;
after flowing through the bypass device, the air is thermally regulated by the auxiliary electric heater to the air supply temperature required by the system and then is sent into the target space.
The dehumidification control steps are as follows:
a) cooling by an air conditioner:
the control system increases the flow of the refrigerant/chilled water by adjusting the air flow adjusting device; meanwhile, the opening degree of the coil air valve is increased, the opening degree of a bypass air valve is reduced or the frequency of a variable frequency fan is increased, the constant output of an air supply fan of the air conditioner is kept, and the air quantity flowing through the coil is continuously regulated and controlled;
the temperature of the outlet air flowing through the coil is always ensured to be lower (1-5 ℃ is usually selected, the adjustment is carried out according to the humidity control precision requirement of an air conditioner and the cold air ratio configuration, meanwhile, the temperature of the coil is kept to be higher than 0 ℃, when the temperature of the coil is close to 0 ℃, the opening degree of an air valve or the adjusting speed of a fan is increased, and the coil is prevented from being frozen), the temperature of the saturated humidity corresponding to the absolute moisture content required by the air of a target space is controlled, and after the temperature of the saturated humidity flows through a bypass device, the temperature is thermally adjusted by an auxiliary electric heater until the temperature of the air supply required by a system is reached, and then the temperature is sent into the target space;
b) heating an air conditioner:
the control system regulates the device refrigerant/chilled water flow rate by progressively decreasing the air flow; meanwhile, the opening degree of the coil air valve is reduced, the opening degree of a bypass air valve is increased or the frequency of a variable frequency fan is reduced, the constant output of an air supply fan of the air conditioner is kept, and the air quantity flowing through the coil is continuously regulated and controlled;
the temperature of the outlet air flowing through the coil is always ensured to be lower than (1-5 ℃ is usually selected, and adjustment is carried out according to the humidity control precision requirement and cold air ratio configuration of the air conditioner) the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space; after flowing through the bypass device, the air is thermally regulated by the auxiliary electric heater to the air supply temperature required by the system and then is sent into the target space.
The humidifying state control steps are as follows:
a) when the outlet air temperature of the coil pipe is lower than the temperature of the saturation humidity corresponding to the absolute moisture content required by the air of the control target space, the opening degree of an air valve of the coil pipe is increased, the opening degree of a bypass air valve is reduced or the frequency of a variable frequency fan is increased, the outlet air temperature of the coil pipe is increased to avoid dehumidification, and an air supply fan of the air conditioner keeps constant output;
the temperature of the outlet air flowing through the coil is always ensured to be less than (usually, 0.1-2 ℃ is selected, and adjustment is carried out according to the humidity control precision requirement and cold air ratio configuration of the air conditioner) the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space; after flowing through the bypass device, the air is humidified by a humidifier and thermally regulated by an auxiliary electric adder until the air supply temperature required by the system is reached, and then the air is sent into a target space;
b) when the outlet air temperature of the coil is higher than the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space, the outlet air temperature flowing through the coil is always ensured to be higher than (usually, 0.1-2 ℃ is selected, and adjustment is carried out according to the humidity control precision requirement of the air conditioner and the cold air ratio configuration) the temperature of the saturated humidity corresponding to the absolute moisture content required by the air in the control target space;
when the air humidity of the target space is higher and the electric heating compensation power output is more than 5 percent (usually 5 to 10 percent, the accurate temperature regulation is ensured to be effective), the air flow adjusting device (usually adopting an air valve with an electric proportional-integral adjusting device or a variable frequency fan and the like) for adjusting the air circulation bypass device reduces the air quantity passing through the coil pipe by reducing the opening degree of the air valve or continuously adjusting the rotating speed of the fan, meanwhile, the control system needs to set an adjusting proportion and an adjusting period (the adjusting proportion is usually not more than 2 percent, the adjusting period is not more than 120 seconds, the higher the control requirement is, the smaller the adjusting proportion is, the smaller the adjusting amplitude is and the shorter the adjusting period is, simultaneously, the temperature of the air-cooled coil pipe is detected, when the temperature of the coil pipe is close to 0 ℃, the air quantity passing through the coil pipe is increased, the flow of refrigerant/freezing water is increased by adjusting the throttling device, and the temperature of the coil pipe is kept to be higher than 0 ℃ to avoid the icing of the coil pipe).
The large fluctuation of the coil outlet air temperature is avoided, the continuity of the coil outlet air temperature is realized, the coil outlet air temperature is lower than the temperature of the saturation humidity corresponding to the absolute moisture content required by the control target space air, and the dehumidification of the target environment is realized.
When the air humidity of the target space is higher and the electric heating compensation power output is less than or equal to 5 percent (generally 5 percent, the effect of accurate temperature regulation is ensured), adjusting 5. the throttling device increases the flow of the refrigerant/chilled water, improves the refrigerating capacity and adjusts the airflow adjusting device of the air circulation bypass device (generally an air valve or a variable frequency fan with an electric proportional-integral adjusting device is adopted), the opening degree of the air valve or the rotating speed of the fan is reduced by continuous adjustment, the air quantity passing through the coil is reduced, meanwhile, the control system needs to set an adjusting proportion and an adjusting period (generally the adjusting proportion is not more than 2 percent, the adjusting period is not more than 120 seconds, the higher the control requirement is, the smaller the adjusting proportion is, the smaller the adjusting range is and the shorter the adjusting period is, simultaneously, the temperature of the air-cooling coil is detected, when the temperature of the coil is close to 0 ℃, the air quantity passing through the coil is improved, and the temperature of the coil is kept to be higher than 0 ℃, avoid the coil pipe to freeze. ).
The large fluctuation of the coil outlet air temperature is avoided, the continuity of the coil outlet air temperature is realized, the coil outlet air temperature is lower than the temperature of saturated humidity corresponding to the absolute moisture content required by the control target space air, and the dehumidification of the target environment is realized;
then the air flowing through the coil pipe air inlet channel is mixed with the air flowing through the bypass channel, and then the temperature is adjusted through electric heating, and the air is sent out of the case after reaching the temperature and humidity requirements of the air supply of the air conditioner, so as to meet the requirements of the temperature and the humidity of the target space.
The air conditioning control system manages devices such as an air circulation bypass device, refrigeration, heat exchange, heating, humidification and air supply, and the sensors for pressure, temperature, humidity and the like of air flow of the air conditioning system collect, so that the temperature and humidity of a control target space are controlled.
The utility model relates to a constant-temperature and constant-humidity air conditioning device which utilizes a bypass device to cool and dehumidify, wherein a part of air flows through an evaporator coil to cool and dehumidify by utilizing the bypass device, and the other part of air does not participate in cooling and dehumidifying and heats the cooled and dehumidified air through mixing, thereby reducing the heating compensation power consumption and obviously saving energy.
The utility model can realize the air supply of the air conditioner with small enthalpy difference and has high control precision.
The utility model utilizes the constant temperature and humidity air conditioning equipment of the cooling dehumidification of the bypass device, adopts the air valve with electric proportional-integral regulation or the frequency conversion fan to continuously regulate the air quantity passing through the evaporator coil, and has convenient installation, simple control and lower manufacturing cost; the application range is wide, and the air conditioner can be widely applied to various high-precision constant-temperature constant-humidity precise air conditioners.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (3)
1. A constant temperature and humidity air conditioning equipment for cooling and dehumidifying by utilizing a bypass device comprises: a ventilation tank and a refrigerant circulation circuit;
the ventilation box is provided with an air return inlet (16) and an air supply outlet (15);
an evaporator coil (6), a humidifier (8), a heater (9), an auxiliary electric heater (10) and a blower (13) are sequentially arranged in the ventilation box (12) from a return air inlet (16) to a feed air inlet (15);
the air return inlet (16) and the air supply outlet (15) are respectively communicated with the target space;
the water collecting tray (7) is positioned at the lower part of the evaporator coil (6);
it is characterized in that an air circulation bypass device (11) is arranged in the ventilation box;
the air return opening (16) is communicated with the air supply opening (15) through an air circulation bypass device (11);
the air circulation bypass device comprises a shunting air channel and a cooling air channel;
the split air channel and the cooling air channel are isolated from each other;
the shunting air channel is provided with an air flow adjusting device which is a bypass proportional air valve;
the cooling air channel is provided with an air flow adjusting device which is a coil proportional air valve;
an evaporator coil is disposed within the cooling air passage.
2. The constant temperature and humidity air conditioning equipment using the bypass device for cooling and dehumidifying as claimed in claim 1, wherein: the refrigerant circulation circuit includes: the device comprises a compressor (1), an air-cooled condenser (2), a drying filter (3), a liquid mirror (4), a throttling device (5) and an evaporator coil (6).
3. A constant temperature and humidity air conditioning equipment for cooling and dehumidifying by utilizing a bypass device comprises: a ventilation tank and a refrigerant circulation circuit;
the ventilation box is provided with an air return inlet (16) and an air supply outlet (15);
an evaporator coil (6), a humidifier (8), a heater (9), an auxiliary electric heater (10) and a blower (13) are sequentially arranged in the ventilation box (12) from a return air inlet (16) to a feed air inlet (15);
the air return inlet (16) and the air supply outlet (15) are respectively communicated with the target space;
the water collecting tray (7) is positioned at the lower part of the evaporator coil (6);
the ventilation box (12) comprises: a mixing primary region, a surface cooling region, a heating region, a humidifying region, a fan region and an auxiliary heating region;
the heating area is provided with a heater;
the humidifying area is provided with a humidifier;
the blower area is provided with a blower;
the auxiliary heating area is provided with an auxiliary electric heater, and is characterized in that:
the surface cooling area comprises a flow dividing air channel and a cooling air channel;
the split air channel and the cooling air channel are isolated from each other;
the shunting air channel is provided with a bypass proportional air valve;
the cooling air channel is provided with a coil pipe proportional air valve;
an evaporator coil is disposed within the cooling air passage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121010309.0U CN216667811U (en) | 2021-05-12 | 2021-05-12 | Constant temperature and humidity air conditioning equipment for cooling and dehumidifying by utilizing bypass device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121010309.0U CN216667811U (en) | 2021-05-12 | 2021-05-12 | Constant temperature and humidity air conditioning equipment for cooling and dehumidifying by utilizing bypass device |
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