JP2006029598A - Air conditioner, and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a practical air conditioner with a high degree of freedom in setting allowing changing of a control target position of temperature and humidity with respect to a user by allowing control of local temperature and humidity in an air-conditioned area. <P>SOLUTION: The air conditioner is provided with a temperature and humidity adjusting indoor unit 12 comprised by arranging an indoor blower 1a, a humidifier 2, a cooling dehumidifier 34, and a reheater 5b in an interior or an adjacent space of the air-conditioned area, a temperature sensor 7a detecting a temperature of a position in any one of a blowout part or a suction part of the indoor unit 12, or the interior of the air-conditioned area, a humidity sensor 8b positioned in any one of the blowout part, the suction part, or the interior of the air-conditioned area, and detecting humidity of a position different from a position of the temperature sensor 7a, and a controller 6 capable of controlling the temperature and humidity in the air-conditioned area by setting a target temperature of the position detected by the temperature sensor 7a and a target humidity of the position detected by the humidity sensor 8b, and controlling the indoor blower 1a, the humidifier 2, the cooling dehumidifier 34, and the reheater 5b on the basis of the settings. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air conditioner that controls the temperature and humidity of an indoor environment such as a machine room, a clean room, a museum, or a storage.

  Conventionally, in museums, art galleries, precision machinery factories, printing factories, storage rooms, operating rooms, pharmaceutical factories, brewing, etc., the temperature and humidity of the indoor environment must be kept constant in order to maintain quality, improve yield, and improve productivity. There is.

  For example, in a computer room air conditioner used in an environment where a temperature and humidity environment of around 24% and 50% is required, a target temperature of the suction temperature or blowout temperature is set, and the suction temperature or blowout during operation is set. The temperature is controlled so as to be within a predetermined range including the above target temperature, and when the suction temperature or the blowing temperature exceeds the upper limit of the predetermined range, the target evaporation temperature is lowered within a range that does not fall below the dew point temperature, When the value falls below the lower limit of the predetermined range, the target evaporation temperature is controlled to be high (see, for example, Patent Document 1).

  In addition, another conventional air conditioner includes an air cooling device using a thermoelectric refrigeration cycle, an air heater composed of an electric heater, and a humidifier installed in an air flow channel from the air intake port of the duct toward the air supply port. A humidifier and blower equipped with an electric heater in the dish are arranged in this order, and the detection signal of the temperature sensor attached to the air supply port is input to the control unit of the air heater to set the target temperature Compared with the above, the deviation output is fed back to the air heater to maintain the air temperature at the target temperature. By controlling the operation, it is humidified to the target humidity and supplied to the target space (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 2003-130430 (FIG. 1) Japanese Patent Laid-Open No. 10-288382 (FIG. 1)

  In a conventional air conditioner, when a dehumidifying load is generated, the cooling dehumidification effect by the evaporator causes the blowing temperature to be close to the saturation temperature, so that when the air is blown as it is to the object to be cooled, the problem is that condensation tends to occur. was there.

  Further, in a device that generates heat such as an electronic computer, the entire device does not generate heat, and there is a portion that does not generate heat partially. In addition, when the device is not in operation, it may not generate heat. In such a case, the cooling air sent by the air conditioner cools the device casing, and depending on the air condition around the device, there is a possibility of condensation on the surface of the device casing.

  Further, in the conventional air conditioner, the dew point temperature is determined by the set temperature and the set humidity of the intake air, and the evaporation temperature is controlled to be equal to or higher than the dew point temperature in order to prevent condensation of the blown air. Therefore, the lower limit of the evaporating temperature becomes the dew point temperature, and the dew point temperature becomes high and sufficient sensible heat capacity and dehumidifying capacity cannot be obtained under conditions of high temperature and high humidity where the cooling load and dehumidification load of the air-conditioned area are large There was a problem that the pull-down time until the desired temperature and humidity were reached was long.

  In addition, humidity control by humidification is not performed in conventional air conditioners, so when low humidity outside air flows into the room by ventilation, such as in winter, the room becomes a low humidity environment, and in the computer room, static electricity is generated. There have been problems such as adverse effects on computers and viruses such as colds in human living spaces such as living rooms.

  Moreover, in the conventional air conditioner, since the electric heater is used for the reheater after dehumidification, the required electric capacity and power consumption of the air conditioner are increased, and furthermore, the electric heater is at a high temperature. There is a problem that the reliability of accidents such as these is low, the apparatus needs to have a fireproof structure, the structure becomes complicated, and the apparatus becomes expensive.

  The present invention has been made to solve the above-described problem, and enables local temperature / humidity control in the air-conditioned area, and allows the user to change the control target position of temperature / humidity. The purpose is to provide a practical air conditioning device with high performance.

  Another object of the present invention is to prevent the air blown into the air-conditioned area from becoming saturated air and to prevent condensation on a cooling object such as a computer.

  In addition, the present invention provides a local temperature by maintaining a constant temperature of air blown from a duct connected to an air conditioner or an underfloor slab while maintaining the humidity of an indoor environment required in a computer or a manufacturing process. The purpose is to provide an air conditioner that performs high-performance air conditioning and high energy savings.

  It is another object of the present invention to provide an air conditioner that can reduce the required electric capacity and power consumption for reheating when reheating is required after dehumidification, and that is highly reliable against accidents such as fires. Yes.

  Moreover, this invention aims at preventing the excessive cooling at the time of a non-operation and preventing dew condensation to a cooling target object, when exothermic apparatuses, such as a computer, are a cooling target object.

  Another object of the present invention is to obtain a highly reliable air conditioner that can prevent static electricity or improve human comfort in a low humidity environment such as winter.

An air conditioner according to the present invention includes a temperature / humidity adjusting unit in which a blowing unit, a humidifying unit, a dehumidifying unit, a heating unit, and a cooling unit are arranged in an air-conditioned area or in a space adjacent thereto, and the temperature / humidity adjusting unit Temperature detection means for detecting the temperature at any position in the blowout section, suction section or air-conditioned area, and temperature detection at any position in the blowout section, suction section or air-conditioned area of the temperature / humidity adjusting means A humidity detecting means for detecting the humidity at a position different from the position where the means is located, a target temperature at the position detected by the temperature detecting means, and a target humidity at the position detected by the humidity detecting means, Control means for controlling the temperature and humidity in the air-conditioned area by controlling the air blowing means, the humidifying means, the dehumidifying means, the heating means and the cooling means.
The control method for an air conditioner according to the present invention includes a temperature / humidity adjusting unit in which a humidifying unit, a dehumidifying unit, a heating unit, and a cooling unit are arranged in an air-conditioned area or in an adjacent space; A temperature detecting means for detecting the temperature of any position in the blowing section, suction section or air-conditioned area of the means, and any position in the blowing section, suction section or air-conditioned area of the temperature / humidity adjusting means, Humidity detecting means for detecting humidity at a position different from the position where the temperature detecting means is provided, and the target temperature at the position detected by the temperature detecting means and the target humidity at the position detected by the humidity detecting means Set, based on the deviation between the detection temperature of the temperature detection means and the target temperature, and the deviation between the detection humidity of the humidity detection means and the target humidity, the humidification amount of the humidification means, the dehumidification amount of the dehumidification means, Heating means By controlling the amount of cooling heat amount and the cooling means, the controls the temperature and humidity of the air conditioning region.

  According to the present invention, the local temperature and humidity in the air-conditioned area can be controlled to a desired set value by attaching the temperature detecting means and the humidity detecting means at different positions in the air-conditioned area. Prevention and generation of static electricity can be prevented.

Embodiment 1 FIG.
FIG. 1 shows an air conditioner according to Embodiment 1 for carrying out the present invention. Here, the indoor unit 12 which is a temperature / humidity adjusting means constituting the air conditioner is arranged in the air-conditioned room 10 or in a space adjacent thereto. The indoor unit 12 includes a humidifier 2 as a humidifying unit, a cooling / dehumidifying unit 34 as a cooling and dehumidifying unit, a reheater 5b as a heating unit, and an indoor blower 1a as a blowing unit in a wind passage in the casing. Arranged. The indoor unit 12 has a structure in which air is introduced from the air inlet 18 which is a suction portion as indicated by an arrow by the indoor blower 1a, the temperature and humidity are adjusted, and then blown out from the air outlet 17 which is a blowout portion to the air-conditioned room 10 It has become. The blowout port 17 of the indoor unit 12 is provided with a blowout temperature sensor 7a as a blown air temperature detection means, and the suction port 18 is provided with a suction humidity sensor 8b as a blown air humidity detection means. Further, here, the variable capacity compressor 101 for compressing and transporting the refrigerant, and a condenser (heat source side heat) for exchanging heat between the refrigerant discharged from the compressor 101 and the ambient air are used as the heating and cooling means. (Exchanger) 5a, an outdoor unit 13 consisting of an outdoor fan 1b that conveys air to the condenser 5a, a reheater 5b that condenses and liquefies the partially condensed refrigerant in the outdoor unit 12 in the indoor unit 12, and a reduced pressure of the liquid refrigerant A heat pump type refrigeration cycle comprising a throttle device 102 for cooling and a cooling dehumidifier 34 that performs heat exchange between the decompressed refrigerant and the air blown by the indoor blower 1a is used.
As the humidifier 2, a steam type, a vaporization type, an ultrasonic type, an adsorption / desorption type, or the like is applied. In any case, a water storage tank and a moisture adsorption device are provided. Further, the humidifier 2, the compressor 101, the indoor blower 1a, the outdoor blower 1b, the throttle based on the values inputted by the temperature and humidity setting device 11 which is a temperature and humidity setting means for setting the temperature and humidity at a desired position. A control device 6 is provided as control means for controlling the device 102.

  Next, a description will be given of a method of controlling the suction humidity using the air conditioner while keeping the blowing temperature constant. FIG. 2 shows the air state of the blowout and suction during the blowout temperature / suction humidity control on the air diagram, and shows the process of cooling and dehumidification. In Fig. 2, the dry bulb temperature TDB [° C] is shown on the horizontal axis, the absolute humidity [kg / kg '] is shown on the vertical axis, and the relative humidity [%] is shown on the diagonal, and the temperature increases from left to right. The humidity increases from bottom to top. In addition, TroDBs shows the blowing temperature setting value (target value), and is determined by setting input to the temperature / humidity setting device 11. Further, Φrs indicates the indoor humidity setting value (target value), and is determined by setting input to the temperature / humidity setting device 11.

  Since the sensible heat load QLS of a building is theoretically proportional to the difference between the outdoor dry bulb temperature ToDB and the indoor dry bulb temperature TrDB, it is generally expressed by the following equation. A is a constant determined by building specifications.

    QLS = A x (ToDB-TrDB) (1)

  The sensible heat capacity QAS of the air conditioner is proportional to the difference between the suction dry bulb temperature (room temperature or suction temperature) TrDB and the blown dry bulb temperature (blowing temperature) TroDB, and is expressed by the following equation. B is a constant determined by the indoor unit air volume.

    QAS = B x (TroDB-TrDB) (2)

In steady state, from Equation (1) and Equation (2)
QLS + QAS = 0 (3)
Holds.

  Therefore, if the blowing temperature TroDB detected by the blowing temperature sensor 7a is constant, the suction temperature TrDB converges to a certain temperature. Therefore, if the cooling amount of the cooling dehumidifier 34 and the heating amount of the reheater 5b are adjusted with the air volume of the indoor blower 1a kept constant, and the blown air temperature TroDB1 is controlled to the set temperature TroDBs, the sensible heat The capacity becomes constant from (2), and the room temperature TrDB converges to a certain temperature TrDB1. In FIG. 2, the relative humidity of the blown air at this time is Φr1. Further, the air state before the reheater 5b at this time is indicated by a point A.

Next, when the blowout temperature is constant at the set value TroDBs and the suction relative humidity is lowered from Φr1 to the set humidity Φrs, the piping temperature Tc1 of the cooling dehumidifier 34 is increased by increasing the frequency of the compressor 101. To reduce the amount of room air dehumidification.
Since the amount of heat exchange in the condenser 5a is reduced by reducing the amount of air blown from the outdoor blower 1b and the amount of reheat in the reheater 5b is increased accordingly, the outdoor blower is set so that the blowing temperature TroDBs is constant. What is necessary is just to control the air volume of 1b. In addition, the air state before the reheater 5b at this time is indicated by a point B. If the air volume of the indoor blower 1a is constant, the room temperature is constant from Equation (3).
In addition, when it is desired to increase the suction relative humidity Φr2 with the blowing temperature TroDB being constant, the humidification of the blowing air by the humidifier 2 can increase the relative humidity of the suction air.

  By controlling the air conditioner in this way, it is possible to control the suction humidity to a desired set value in a state where the blowout temperature is controlled to a desired set value.

FIG. 3 is a flowchart showing the operation method of the first embodiment, and the control method of the air conditioner will be described in detail based on this.
First, in step ST1, a control target position of temperature T1 and a control target position of humidity Φ2 are set. Here, the temperature T1 is set to the blowing position, and the humidity Φ2 is set to the suction position. In step ST2, the temperature / humidity setting device 11 is used to set a set temperature Ts1, which is a target temperature at those positions, and a set humidity Φs2, which is a target humidity. In step ST3, the temperature sensor 7a detects the blown air temperature T1. In step ST4, the intake air humidity Φ2 is detected by the humidity sensor 8b.
Next, sensible heat capacity control is performed in step ST5. This is a cooling dehumidifier that increases the amount of cooling when the temperature T1 is higher than the set temperature Ts1 from the deviation between the set temperature Ts1 and the control target temperature T1, and increases the amount of heating when the temperature T1 is lower than the set temperature Ts1. 34. The reheater 5b and the like are controlled to approach the target value Ts1. In the configuration of FIG. 1, the cooling dehumidifier 34 is indirectly controlled by controlling the compressor 101, and the reheater 5b is indirectly controlled by controlling the outdoor fan 1b. Then, in step ST6, it is determined whether or not the temperature T1 to be controlled is within a predetermined range including the target value Ts1, and if so, the process proceeds to the next step ST7. Control is performed (step ST6 → ST3). Here, a range of ± ΔTs1 with respect to the set temperature Ts1 is set as a predetermined range. If this blowing temperature T1 becomes a constant steady state, the room temperature of the air-conditioned room 10 also becomes a steady value.
Next, latent heat capability control is performed in step ST7. Here, since the latent heat capability is controlled in a state where the blowing temperature T1 is maintained, if the piping temperature of the cooling dehumidifier 34 is lowered, the amount of dehumidification increases and the relative humidity decreases. On the other hand, when it is desired to increase the relative humidity, the humidifier 2 is operated to increase the humidification amount. In step ST8, it is determined whether or not the relative humidity Φ2 is within a predetermined range including Φs2. If the relative humidity Φ2 is within the predetermined range, the current operating state is maintained in step ST9. Return to step ST3. On the other hand, if the relative humidity Φ2 is not within the predetermined range, feedback is applied, and the heating amount, cooling amount, dehumidifying amount, and humidifying amount are controlled according to the deviation from the set temperature Ts1 and the set humidity Φs2 (step ST8 → ST3). Here, the range of ± ΔΦs2 with respect to the set humidity Φs2 is a predetermined range.

By controlling the air conditioner in this way using the control device 6, the blowing temperature and the suction humidity can be brought close to the desired temperature and humidity.
Further, since the air conditioner performs reheating in the indoor unit 12 by refrigerant reheating by heat recovery, the electric capacity can be reduced as compared with the electric heating type, so that power consumption is small and energy saving is high.

  In addition, since the electric heater is not used for reheating, the electric heater is highly reliable against accidents such as fire due to high temperature, and the indoor unit is simple and easy because there is no need to make the device a fireproof structure. It becomes small.

FIG. 4 is a flowchart of another operation method of the first embodiment, and another example of the control method of the air conditioner will be described based on this flowchart.
First, in step ST201, a control target position of temperature T1 and a control target position of humidity Φ2 are set. Here, the temperature T1 is set to the blowing position, and the humidity Φ2 is set to the suction position. In ST202, the set temperature Ts1 and set humidity Φs2 are set from the temperature and humidity setting device 11. In step ST203, the condensation temperature target value CTm and the evaporation temperature target value ETm are temporarily set. In step ST204, the temperature sensor 7a detects the blown air temperature T1. In step ST205, the humidity sensor 8b detects the intake air humidity Φ2.
Next, in step ST206, it is determined whether T1 is within a predetermined temperature range of set temperature Ts1 ± ΔTs1. If not within the predetermined temperature range, the condensation temperature target value CTm is changed based on the deviation between the current temperature T1 and the set temperature Ts1 in ST207, and the reheater 5b and the like are controlled based on the target value CTm. The change is made based on the mathematical formula shown in ST207. Here, α is a positive coefficient. If the temperature T1 is within the predetermined temperature range in step ST206, the process proceeds to step ST208 as it is.
Next, in step ST208, it is determined whether Φ2 is within a predetermined humidity range of set humidity Φs2 ± ΔΦs2. If Φ2 is not within the predetermined humidity range, the evaporating temperature target value ETm is changed based on the difference between the current humidity Φ2 and the set humidity Φs2 in ST209, and the cooling dehumidifier 34 and the like are controlled based on the target value ETm. To do. The change is made based on the mathematical formula shown in SDT209. Here, β is a positive coefficient. If the humidity Φ2 is within the predetermined humidity range in step ST208, the current operating state is held in step ST210.

  By controlling the air conditioner in this way using the control device 6, the temperature and humidity are controlled almost simultaneously, so that the pull-down time until reaching the set temperature or set humidity can be further shortened.

  Moreover, as shown in FIG. 5, you may add the solenoid valves 201-203 to the junction part of each path | pass of the heat exchanger of the reheater 5b of FIG. In this case, as shown in FIG. 6, the refrigerant flowing into the reheater 5b is variable in seven stages from 0 pass to 12 passes by the combination of opening and closing of these solenoid valves, so the reheat amount adjustment range is expanded. And the temperature and humidity control range is expanded. Further, in FIG. 5, a check valve 210 is provided at the heat exchanger outlet to prevent the refrigerant from flowing back to the reheater 5b. In addition, the adjustment method of the heat exchange amount of the reheater 5b is not restricted to this, You may employ | adopt other arbitrary methods.

  Further, as shown in FIG. 7, a branch pipe that bypasses the cooling dehumidifier 34 may be provided at the outlet of the heat exchanger of the reheater 5b, and a throttle device 102a may be added in the middle thereof. In this way, since the flow rate of the refrigerant flowing to the cooling dehumidifier 34 can be adjusted, even if the heat exchanger capacity of the reheater 5b is maximum, the flow rate of the refrigerant flowing through the cooling dehumidifier 34 is reduced by opening the expansion device 102a. Therefore, the amount of reheat increases relatively and the temperature and humidity control range is expanded.

  Moreover, as shown in FIG. 8, you may comprise so that the cooling dehumidifier 34 and the reheater 5b may be connected to the refrigerating cycle of another system | strain. In this case, the evaporating temperature is controlled by the cooling dehumidifier 34 and the humidity detected by the humidity sensor 8b is adjusted, and the reheat amount is controlled by the reheater 5b and the temperature detected by the temperature sensor 7a is adjusted. . By controlling the temperature and humidity in separate refrigeration cycles in this way, there are effects that the restrictions due to the refrigeration cycle are greatly relaxed and the temperature and humidity control range is widened. Further, the pull-down speed and temperature / humidity controllability are further improved, which is effective when precise temperature / humidity controllability is required. In FIG. 8, reference numeral 3a represents an evaporator.

In the above description, the cooling dehumidifier 34 has been described as a refrigerant direct expansion type, but the cooling dehumidifier 34 may be a cold water coil or other cooling type. The cooling dehumidifier 34, the cooler 3, and the dehumidifier 4 may be directly controlled by the control device 6.
In the above description, the temperature sensor 7a is provided in the blowout part and the humidity sensor 8b is provided in the suction part. However, in the present invention, the temperature at any position and the arbitrary position are provided. It is possible to control the humidity at. For example, FIG. 9 shows blowing temperature and suction humidity, FIG. 10 shows blowing humidity and suction temperature, FIG. 11 suction humidity and far temperature, FIG. 12 shows suction temperature and far humidity, FIG. 13 shows blowing temperature and far humidity, and FIG. 14 shows blowing. This is an example of a configuration that detects humidity and a distant temperature. In any configuration, the temperature at a position where the temperature sensor is located and the humidity at the position where the humidity sensor is located can be controlled. Here, the distant temperature refers to the temperature at an arbitrary position in the air-conditioned room 10 excluding the periphery of the blowing part and the suction part, and the far humidity refers to the inside of the air-conditioned room 10 excluding the periphery of the blowing part and the suction part. Refers to the humidity at any position. Even if it does in this way, since the control flowchart of the air conditioning apparatus of FIGS. 9-14 can operate | move on the same principle as FIG. 3, FIG. 4, even if it changes a sensor position, it is not necessary to change a control algorithm. The present invention may have other configurations, and the temperature and humidity at the position where the sensor is disposed can be controlled by any configuration as long as cooling dehumidification, humidification, and heating can be controlled.

  As described above, by arranging the temperature sensor and the humidity sensor at a position where the user wants to control the temperature and humidity, air conditioning at a local position in the air-conditioned area becomes possible. Moreover, as shown in FIG. 15, if the duct 15 is connected to the blowing position, an operation with higher energy saving performance can be realized as compared with the entire air conditioning.

Furthermore, the cooling dehumidifier 34 may have a configuration in which the cooler 3 and the dehumidifier 4 are separated as shown in FIG. Here, the reheater 5a so far is indicated as the heater 5. As the dehumidifier 4, a cold water coil, a direct refrigerant expansion, a chemical adsorbent, or the like can be used. As the heater 5, a hot water coil, a heater, or the like can be used. In addition, the cooler 3 and the heater 5 are provided in series in the air blowing direction, one of which is cold and the other is supplying warm air to the air, but the indoor load is a heating and humidifying load, and cooling and dehumidification When it is not necessary to perform the operation, the operation mode may be switched, and both may supply heat as shown in FIG.
Further, when the indoor load is a cooling and dehumidifying load and heating is not required, the operation mode may be switched, and both may supply cold as shown in FIG. Further, as shown in FIG. 19, the cooling dehumidifier 34 and the heater 5 (or the reheater 5 b) may be arranged in parallel with the air blowing so as to supply the same hot and cold heat. When the cooling dehumidifier is divided into a cooler and a dehumidifier, at least two of the cooler, the dehumidifier, and the heater may be arranged in parallel. Thereby, it becomes possible to change the shape of the indoor unit 12 variously.

  In addition, as shown in FIG. 20, the temperature sensors 7 a, 8 a, 9 a, the humidity sensors 7 b, 8 b, 9 b are connected to the blowing unit, the suction unit, and any position in the air-conditioned room 10. A set temperature position and a set humidity position at each position may be selected by switching the temperature / humidity setting device 11 or a dip switch. In this way, various combinations of control target positions can be set in step ST1 of FIG. 3 or step ST201 of FIG. 4, and the temperature at any position in the room and the humidity at a position different from that can be controlled to a desired value. It is possible to obtain an indoor environment with a high degree of freedom in setting that meets user needs and improved comfort.

Embodiment 2. FIG.
FIG. 21 shows an air-conditioning apparatus according to Embodiment 2 of the present invention. The configuration diagram of this air conditioner has a configuration in which a suction temperature sensor 8a is added to the suction portion of the indoor unit 12 in the configuration of FIG. 1, in which the control mode of the control device 6 is different from that of the first embodiment. is doing. In addition, about the structure of the heat pump part which adjusts the cooling amount of the cooling dehumidifier 34 and the reheat amount of the reheater 5b, it abbreviate | omitted here. Accordingly, here, the reheater 5b and the cooling dehumidifier 34 are also displayed so as to be directly controlled by the control device 6. FIG. 22 shows changes on the air diagram during cooling and dehumidifying load operation when the control algorithm of the second embodiment is applied, and FIG. 23 is a flowchart showing the temperature and humidity control algorithm of this air conditioner. .

Next, the temperature / humidity control method of the second embodiment will be described with reference to the flowchart of FIG. First, in step ST11, two different control target positions of temperatures T1 and T2 and a control target position of humidity Φ2 are set. Here, the temperature T1 is set at the blowing position, the temperature T2 is set at the suction position, and the humidity Φ2 is set at the suction position. In step ST12, the temperature / humidity setting device 11 sets the set temperatures Ts1 and Ts2 that are target temperatures at the respective positions and the set humidity Φs2 that is a target humidity. In step ST13, the temperature sensors 7a and 8a detect the blown air temperature T1 and the intake air temperature T2. In step ST14, the intake air humidity Φ2 is detected by the humidity sensor 8b.
Next, sensible heat capacity control is performed in step ST15. That is, when the temperature T1 is higher than the set temperature Ts1 from the deviation between the set temperature Ts1 and the blowout position temperature T1, the cooling dehumidifier 34 is controlled to increase the cooling amount, and when the temperature T1 is lower than the set temperature Ts1, reheating is performed. The device 5b is controlled to increase the heating amount so as to approach the target value Ts1. In step ST16, it is determined whether the control target temperature T1 is within a predetermined range including the target value Ts1. As a result, if the temperature T1 is within the predetermined temperature range, it is determined that the temperature is stable, and the process proceeds to step ST17. If not, the process returns to step ST13. Here, a range of ± ΔTs1 with respect to the set temperature Ts1 is set as a predetermined range. If the blowing temperature T1 becomes a constant value, the room temperature of the air-conditioned room 10 also becomes a constant value.
Next, in step ST17, the indoor blower 1a is controlled to control the air flow so that the temperature T2 at the suction position approaches the set temperature Ts2. FIG. 22 shows the movement on the air diagram when the air volume of the indoor blower 1a of the air conditioner is reduced. As shown in FIG. 22, when the blowout temperature TroDB1 is constant, if the air volume is reduced, the capacity of the air conditioner decreases, and the difference between the suction temperature TrDB2 and the blowout temperature TroDB1 changes, and the suction temperature TrDB is It changes in the direction of the temperature and humidity convergence point during non-air conditioning. On the other hand, if the air volume of the indoor blower 1a is increased, the capacity of the air conditioner increases and the suction temperature TrDB2 changes in a direction in which the difference from the blowout temperature TroDB1 decreases.
Next, in step ST18, it is determined whether or not the control target position temperature T2 is within a predetermined range including the target value Ts2. As a result, if the temperature T2 is within the predetermined temperature range, it is determined that the temperature has stabilized, and the process proceeds to step ST19. If not, the process returns to step ST13. Here, a range of ± ΔTs2 with respect to the set temperature Ts2 is set as a predetermined range.
Next, latent heat capability control is performed in step ST19. If the heat exchanger temperature of the cooling dehumidifier 34 is lowered while the blowout temperature T1 is maintained, the dehumidification amount increases and the relative humidity decreases. On the other hand, when it is desired to increase the relative humidity, the humidifier 2 is operated to increase the humidification amount.
Next, in step ST20, it is determined whether the intake air humidity (relative humidity) Φ2 is within a predetermined range including Φs2. As a result, when the humidity Φ2 is within the predetermined humidity range, the process proceeds to step ST21 and the operation state is maintained, and when not, the process returns to step ST13. Here, a range of ± ΔΦs2 with respect to the set temperature Φs2 is set as a predetermined range.

By controlling the air conditioner using the control device 6 as described above, the temperature and humidity of the intake air and the temperature of the blown air can be controlled simultaneously.
It should be noted that the temperature sensor is provided at two locations of the indoor unit 12 at any one of the positions in the blowing portion, the suction portion, or the air-conditioned area, or at two different positions in the air-conditioned room 10, and the blowing portion, the suction portion, or By providing a humidity sensor at one of the positions in the air-conditioned area, various combinations of the positions to be controlled are possible, and two different indoor temperatures and one humidity can be set to desired values. It can be controlled and an indoor environment with a high degree of freedom of setting can be obtained.

Embodiment 3 FIG.
FIG. 24 shows changes on the air diagram when cooling and dehumidification is performed by the air conditioning apparatus according to Embodiment 3 of the present invention, and FIG. 25 is a flowchart showing the temperature and humidity control algorithm of the air conditioning apparatus. . In addition, the structure of the air conditioner used in Embodiment 3 can divert the structure of the air conditioner of FIG. 21, and the control aspect of the control apparatus 6 is different from Embodiment 2 there.

A method for controlling the temperature and humidity of the apparatus in the third embodiment will be described with reference to the flowchart of FIG.
First, in step ST101, a control target position of temperature T1 and a control target position of humidity Φ2 are set. Here, the temperature T1 is set to the blowing position, and the humidity Φ2 is set to the suction position. In step ST102, the set temperature Ts1 and set humidity Φs2 are set from the temperature and humidity setting device 11. In step ST103, the air temperature T1 is detected by the temperature sensor 7a. In step ST104, the temperature T2 and humidity Φ2 of the intake air are detected by the temperature sensor 8a and the humidity sensor 8b, respectively. In step ST105, the dew point temperature Td2 is calculated from the intake air temperature and humidity T2 and Φ2 obtained in ST104. In step ST106, the set temperature Ts and the dew point temperature Td2 are compared to determine their magnitude. If the set temperature Ts1 is lower than the dew point temperature Td2, the process proceeds to ST107, where the set temperature Ts1 is set to the dew point temperature Td2, and the target lower limit value of the blow-out temperature is always set to the dew point temperature or higher.
Next, when it is determined in step ST106 that the set temperature Ts1 is higher than the dew point temperature Td2, or after the completion of step ST107, sensible heat capacity control is performed in step ST108. Here, when the temperature T1 is higher than the set temperature Ts1 from the deviation between the set temperature Ts1 and the blowout position temperature T1, the cooling dehumidifier 34 is controlled to increase the cooling amount, and when the temperature T1 is lower than the set temperature Ts1, The heating device 5b is controlled to increase the heating amount so as to approach the target value Ts1. If the blowing position temperature T1 falls within a predetermined range including the target value Ts1 in step ST109, it is determined that the temperature has stabilized, and the process proceeds to step ST110. On the other hand, when T1 is not within the predetermined range, the process returns to step ST103. Here, a range of ± ΔTs1 with respect to the set temperature Ts1 is set as a predetermined range.
Next, latent heat capability control is performed in step ST110. Here, the latent heat capacity is controlled so that the suction relative humidity Φ2 is brought close to the set relative humidity Φs2 while the blowing temperature T1 is maintained. As shown in FIG. 24, when the relative humidity Φ2 is higher than the set humidity Φs2, the heat exchanger temperature of the cooling dehumidifier 34 is lowered from Tc1 to Tc2, so that dehumidification proceeds and the relative humidity decreases. On the other hand, when it is desired to increase the relative humidity, the humidifier 2 is operated to increase the humidification amount. Next, in step ST111, it is determined whether or not the relative humidity Φ2 is within a predetermined range including Φs2. In the flowchart of the figure, a range of ± ΔΦs2 is set to a predetermined range with respect to the set temperature Φs2. When both the temperature T1 and the humidity Φ2 are maintained at the set temperature and the set humidity, the process proceeds to ST112 and the current operation state is maintained. On the other hand, when the humidity Φ2 is not maintained at the set humidity, the process returns to step ST103.

  By controlling the air conditioner as described above using the control device 6, the blowing temperature does not become lower than the dew point temperature of the intake air while the humidity of the intake air is maintained at a desired value. Condensation due to blown air is reliably prevented. Even when a dehumidifying load is generated, since the reheater 5b reheats the blowout temperature to be higher than the dew point temperature of the intake air, it is possible to prevent dew condensation on the temperature management object.

  In the third embodiment, the dew point is calculated at the position of the intake air. However, if this temperature / humidity detection position is installed near the cooling object (temperature management object) 14 as shown in FIG. In addition, multiple temperature and humidity sensors may be installed in the air-conditioned area, and the dew point temperature is calculated at each position, and the highest dew point temperature value is set as the target temperature lower limit value. In this case, condensation due to the blown air can be prevented, and a highly reliable air conditioner can be obtained.

  In the control of the present invention, the control is performed using the relative humidity, but it is needless to say that the control may be performed using the absolute humidity, the dew point temperature, and the wet bulb temperature instead of the relative humidity.

In addition, although an air conditioner with one indoor unit has been described here, the present invention may be of a multi-type including a plurality of indoor units, or includes a plurality of outdoor units. Of course, it may be.
Also in the second and third embodiments, the cooling dehumidifier 34, the cooler 3, the dehumidifier 4, the reheater 5b and the like are configured by a refrigeration cycle, as described in the first embodiment. You may comprise from other means.
Furthermore, the control device 6 shown in the first to third embodiments is usually composed of a CPU and a control program for defining each process according to the procedure shown in each flowchart.

The block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The air line figure which shows the state of the suction air in the Embodiment 1 of this invention, and blowing air. The control flowchart of the air conditioning apparatus in Embodiment 1 of this invention. The another control flowchart of the air conditioning apparatus in Embodiment 1 of this invention. The block diagram of the reheater in Embodiment 1 of this invention. The figure which shows the relationship between opening and closing of the solenoid valve of the reheater shown in FIG. 5, and a path | pass. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The another block diagram of the air conditioning apparatus in Embodiment 1 of this invention. The block diagram of the air conditioning apparatus in Embodiment 2 or 3 of this invention. The air line figure which shows the state of the suction air in the Embodiment 2 of this invention, and blowing air. The control flowchart of the air conditioning apparatus in Embodiment 2 of this invention. The air line figure which shows the state of the suction air in the Embodiment 3 of this invention, and blowing air. The control flowchart of the air conditioning apparatus in Embodiment 3 of this invention. Another block diagram of the air conditioning apparatus in Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Indoor blower, 1b Outdoor blower, 2 Humidifier, 3 Cooler, 3a Evaporator, 4 Dehumidifier, 5 Heater, 5a Condenser, 5b Reheater, 6 Control device, 7a Outlet temperature sensor, 7b Outlet humidity sensor , 8a Suction temperature sensor, 8b Suction humidity sensor, 9a Remote temperature sensor, 9b Remote humidity sensor, 10 Air-conditioned room, 11 Temperature / humidity setting device, 12 Indoor unit, 13 Outdoor unit, 14 Cooling object, 15 Duct, 34 Cooling Dehumidifier, 101 compressor, 102 throttle device, 102a throttle device, 201 solenoid valve, 202 solenoid valve, 203 solenoid valve, 210 check valve.

Claims (18)

A temperature / humidity adjusting means in which a blowing means, a humidifying means, a dehumidifying means, a heating means, and a cooling means are arranged in an air-conditioned area or in a space adjacent thereto;
Temperature detecting means for detecting the temperature of any position in the blowing part, the suction part or the air-conditioned area of the temperature and humidity adjusting means;
Humidity detection means for detecting the humidity at a position different from the position where the temperature detection means is located at any one of the blowing part, the suction part or the air-conditioned area of the temperature / humidity adjustment means,
The target temperature at the position detected by the temperature detecting means and the target humidity at the position detected by the humidity detecting means are set, and the air blowing means, the humidifying means, the dehumidifying means, the heating means and the cooling are set. Control means for controlling the means and controlling the temperature and humidity in the air-conditioned area;
An air conditioner comprising: A temperature / humidity adjusting means in which the air blowing means, the humidifying means, the cooling / dehumidifying means, and the heating means are arranged in the air-conditioned area or in an adjacent space;
Temperature detecting means for detecting the temperature of any position in the blowing part, the suction part or the air-conditioned area of the temperature and humidity adjusting means;
Humidity detection means for detecting the humidity at a position different from the position where the temperature detection means is located at any one of the blowing part, the suction part or the air-conditioned area of the temperature / humidity adjustment means,
The target temperature at the position detected by the temperature detecting means and the target humidity at the position detected by the humidity detecting means are set, and the air blowing means, the humidifying means, the heating means, and the cooling and dehumidifying means are controlled. And control means capable of controlling the temperature and humidity in the air-conditioned area;
An air conditioner comprising:   The compressor, the heat source side heat exchanger, the throttle means, and the use side heat exchanger are connected by refrigerant piping to form a refrigeration cycle, and the use side heat exchanger is used as the heating means. Or the air conditioning apparatus of 2.   A compressor, a heat source side heat exchanger, an expansion means, and a use side heat exchanger are connected by a refrigerant pipe to constitute a refrigeration cycle, and the use side heat exchanger is the cooling means, the dehumidifying means, or the cooling and dehumidifying means. The air conditioner according to claim 1 or 2, wherein   A compressor, a heat source side heat exchanger, a first usage side heat exchanger, a throttle means, and a second usage side heat exchanger are connected by a refrigerant pipe to constitute a refrigeration cycle, and the first usage side heat exchange The air conditioner according to claim 1 or 2, wherein a heating device is the heating unit, and the second usage-side heat exchanger is the cooling unit, the dehumidifying unit, or the cooling and dehumidifying unit.   At least one open / close valve is provided in the refrigerant flow path of the first use side heat exchanger, and the open / close valve is opened / closed according to a temperature difference between the temperature detected by the temperature detecting means and a target temperature. The air conditioning apparatus according to claim 5.   A branch pipe between any position of the flow path from the first use side heat exchanger to the throttle means and any position of the flow path from the second use side heat exchanger to the compressor The air conditioner according to claim 5 or 6, wherein a flow rate adjusting means is provided in the middle of the branch pipe.   The said cooling means, the said dehumidification means, and the said heating means are arrange | positioned in series with respect to the flow direction of the air of the air path of the said temperature / humidity adjustment means, The Claim 1 thru | or 7 characterized by the above-mentioned. Air conditioner.   The at least two of the cooling means, the dehumidifying means and the heating means are arranged in parallel to the air flow direction of the air passage of the temperature / humidity adjusting means. The air conditioning apparatus in any one.   The temperature / humidity adjusting means includes a temperature detecting means for detecting temperatures at two positions of any one of the positions in the blowing section, the suction section, or the air-conditioned area, or two positions at different positions in the air-conditioned area. 10. The temperature at a certain position of the temperature detecting means is set, and the temperature difference between the two set points is changed to a temperature difference within a predetermined range by changing the air volume of the air blowing means. The air conditioning apparatus in any one of.   A temperature detection means and a humidity detection means are provided as a pair at one of the positions in the blowing portion, the suction portion, or the air-conditioned area of the temperature and humidity adjustment means, and the value 1 detected from the values detected by these means. The air conditioner according to any one of claims 1 to 9, wherein the control means is operated so that a temperature in the vicinity of the location falls within a predetermined range that does not become the dew point temperature or lower.   The air conditioning apparatus according to claim 1 or 2, wherein the heating means and the means for cooling and dehumidification are configured by separate refrigeration cycles. A temperature / humidity adjusting means in which the air blowing means, the humidifying means, and the heating means are arranged in the space to be air-conditioned or in an adjacent space;
Temperature detecting means for detecting the temperature of any position in the blowing part, the suction part or the air-conditioned area of the temperature and humidity adjusting means;
Humidity detection means for detecting the humidity at a position different from the position where the temperature detection means is located at any one of the blowing part, the suction part or the air-conditioned area of the temperature / humidity adjustment means,
The target temperature at the position detected by the temperature detecting means and the target humidity at the position detected by the humidity detecting means are set, the air blowing means, the humidifying means and the heating means are controlled, and the air-conditioned Control means that can control the temperature and humidity in the region;
An air conditioner comprising: A temperature / humidity adjusting means in which the air blowing means, the humidifying means, and the cooling and dehumidifying means are arranged in the air-conditioned area or in a space adjacent thereto;
Temperature detecting means for detecting the temperature of any position in the blowing part, the suction part or the air-conditioned area of the temperature and humidity adjusting means;
Humidity detection means for detecting the humidity at a position different from the position where the temperature detection means is located at any one of the blowing part, the suction part or the air-conditioned area of the temperature / humidity adjustment means,
Setting a target temperature at a position detected by the temperature detecting means and a target humidity at a position detected by the humidity detecting means, and controlling the air blowing means, the humidifying means, and the cooling and dehumidifying means; Control means capable of controlling the temperature and humidity in the air-conditioned area;
An air conditioner comprising: Humidification means, dehumidification means, heating means, and cooling means are arranged in the interior of the air-conditioned area or in a space adjacent to the temperature / humidity adjusting means,
Temperature detecting means for detecting the temperature of any position in the blowing part, the suction part or the air-conditioned area of the temperature and humidity adjusting means;
Humidity detection means for detecting the humidity at a position different from the position where the temperature detection means is located at any position within the blowout part, suction part or air-conditioned area of the temperature and humidity adjustment means,
The target temperature at the position detected by the temperature detecting means and the target humidity at the position detected by the humidity detecting means are set, and the deviation between the detected temperature of the temperature detecting means and the target temperature and the humidity detection And controlling the humidification amount of the humidification means, the dehumidification amount of the dehumidification means, the heating amount of the heating means and the cooling amount of the cooling means based on the deviation between the detected humidity of the means and the target humidity, A control method for an air conditioner characterized by controlling the temperature and humidity of the air. A temperature / humidity adjusting means in which the humidifying means and the heating means are arranged in the space to be air-conditioned or in the adjacent space;
Temperature detecting means for detecting the temperature of any position in the blowing part, the suction part or the air-conditioned area of the temperature and humidity adjusting means;
Humidity detection means for detecting the humidity at a position different from the position where the temperature detection means is located at any position within the blowout part, suction part or air-conditioned area of the temperature and humidity adjustment means,
The target temperature at the position detected by the temperature detecting means and the target humidity at the position detected by the humidity detecting means are set, and the deviation between the detected temperature of the temperature detecting means and the target temperature and the humidity detection An air conditioner for controlling the temperature and humidity in the air-conditioned area by controlling a humidification amount of the humidification unit and a heating amount of the heating unit based on a deviation between a detected humidity of the unit and the target humidity Control method. A temperature / humidity adjusting means in which a humidifying means and a cooling and dehumidifying means are arranged in an air-conditioned area or in a space adjacent thereto;
Temperature detecting means for detecting the temperature of any position in the blowing part, the suction part or the air-conditioned area of the temperature and humidity adjusting means;
Humidity detection means for detecting the humidity at a position different from the position where the temperature detection means is located at any position within the blowout part, suction part or air-conditioned area of the temperature and humidity adjustment means,
The target temperature at the position detected by the temperature detecting means and the target humidity at the position detected by the humidity detecting means are set, and the deviation between the detected temperature of the temperature detecting means and the target temperature and the humidity detection Controlling the temperature and humidity in the air-conditioned area by controlling the humidification amount of the humidification means and the cooling amount and dehumidification amount of the cooling and dehumidifying means based on the deviation between the detected humidity of the means and the target humidity. A control method for an air conditioner. The temperature / humidity adjusting means further includes a blowing means, and based on the deviation between the detected temperature of the temperature detecting means and the target temperature, the air volume of the blowing means is also controlled to control the temperature and humidity in the air-conditioned area. The control method of the air conditioning apparatus in any one of Claims 15 thru | or 17 characterized by these.

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