JPH08136016A - Air conditioner - Google Patents

Abstract

PURPOSE: To provide an air conditioner increasing a humidification value of a natural evaporation type humidifier free from restriction by a blowoff temperature while preventing the lowering of the blowoff temperature. CONSTITUTION: An air conditioner is provided with a heat exchanger 2, a blowing means 3, a natural evaporation type humidifier 5, an inlet side heating means 10 to increase a humidification value by heating an air flow 6 passing through the heat exchanger, a humidity detection means 11, an outlet side heating means 12 to re-heat the air flow lowered in temperature accompanied by humidifying, an outlet temperature detection means 13 to detect an outlet temperature and a humidification controller 14 to control a heating value of the inlet side heating means 10 according to an output of the humidity detection means 11 while controlling the heating value of the outlet side heating means 12 according to an output of the outlet temperature detection means 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner equipped with a natural evaporation type humidifying device used to prevent indoor air from drying.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of comfort in the indoor environment, it is necessary to maintain an appropriate humidity of 40 to 60% relative humidity, and it is becoming more and more compact and a humidifying device with a large humidifying capacity, and the humidifying amount that can be controlled There is an increasing demand for air conditioners equipped with devices.

Further, as a result of an increase in the amount of heat generated by OA equipment and the like, the need for cooling operation increases even in winter, and there is also an increasing demand for humidification during cooling operation in order to prevent a low humidity condition at that time.

Conventionally, as this type of air conditioner, there is one disclosed in Japanese Patent Application Laid-Open No. 2-247435.

The conventional air conditioner will be described below with reference to the drawings. FIG. 7 is a side view showing a schematic configuration of a conventional air conditioner. In FIG. 7, reference numeral 1 is a main body of the air conditioner, 2 is a heat exchanger, and 3 is a blowing means for ventilating the heat exchanger 2. Reference numeral 4 is a water supply device, and 5 is a natural evaporation type humidifying device, and as a humidifying system, a dropping system, a flow system, a rotary system, a suction system, etc. are used. 6 is a heat exchanger passing air flow passing through the heat exchanger 2, 7 is a passage-shaped flow dividing means for dividing a part of the heat exchanger passing air flow 6 before passing through the natural evaporation type humidifying device 5, and 8 is It is a humidifier passing air flow that passes through the natural evaporation humidifying device 5 of the heat exchanger passing air flow 6 divided by the flow dividing means 7.

The operation of the air conditioner configured as above will be described below. First, the air blowing unit 3 ventilates the heat exchanger 2 to exchange heat between the heat exchanger 2 and the heat exchanger passing air flow 6, and heats and cools the heat exchanger passing air flow 6 during heating operation. Airflow through heat exchanger 6 during operation
To cool. After that, the heat exchanger passing air flow 6 is branched by the flow dividing means 7, and only the humidifying device passing air flow 8 passes through the natural evaporation type humidifying device 5, so that the pressure loss by the natural evaporation type humidifying device 5 is not increased. A large air volume will be obtained.

On the other hand, when water is supplied from the water supply device 4 to the natural evaporative humidifier 5 and the air flow 8 passing through the humidifier passes between the natural evaporative humidifiers 5, the natural evaporative humidifier 5
The water retained inside the chamber is naturally evaporated to humidify the air flow 8 passing through the humidifier.

The air stream 8 passing through the humidifier is joined with the air stream that has been split by the flow splitting means 7 and has not passed through the natural evaporation type humidifier 5, and is blown out from the air conditioner 1 as a blown air stream 9.

[0009]

However, in the above-mentioned conventional structure, the humidification amount largely depends on the temperature and humidity of the humidified air, so that the humidified air has a low temperature and a high humidity, especially during cooling operation. In some cases, the amount of humidification is insufficient with respect to the required amount of humidification. Further, since the humidification amount largely depends on the temperature / humidity state of the air to be humidified, the humidification amount cannot be controlled freely.

The present invention solves the conventional problems by providing an air conditioner which can secure a sufficient amount of humidification without largely depending on the temperature and humidity of the air to be humidified and can humidify even during cooling operation, and An object is to provide an air conditioner capable of controlling the amount of humidification.

Further, in the above-mentioned conventional structure, since the heat of vaporization is taken away by humidification and the blow-out temperature of the air conditioner is lowered, an air conditioner having a heating capacity one step higher must be installed during heating. It has a drawback that the room temperature is lowered and that a person in the room is exposed to an air stream having a low temperature, which causes discomfort.

Further, when the humidification amount is increased, the blowing temperature is further lowered, so that the humidification amount cannot be increased beyond a certain level.

Another object of the present invention is to provide an air conditioner capable of performing humidification which is not restricted by the blowing temperature without lowering the blowing temperature even when humidified and in which the blowing temperature can be controlled. .

[0014]

To achieve this object, an air conditioner according to the present invention is provided with a heat exchanger passing through a heat exchanger which is installed between a heat exchanger and a natural evaporative humidifier. An inlet side heating means for heating the air flow, a humidity detecting means for detecting the humidity of the air, and a humidifier passing air flow that is humidified by the natural evaporative humidifier installed downstream of the natural evaporative humidifier. The outlet side heating means, the outlet temperature detecting means installed downstream of the outlet side heating means for detecting the outlet temperature of the air flow through the humidifier, and the heating amount of the inlet side heating means depending on the output from the humidity detecting means. It has a humidifying control device for controlling and controlling the heating amount of the outlet side heating means according to the output of the outlet temperature detecting means.

Further, an inlet side heating means for heating the air flow passing through the heat exchanger, which is installed between the heat exchanger and the natural evaporation type humidifier, and which has been heat-exchanged by the heat exchanger, and a humidity for detecting the humidity of the air. Between the detection means, the outlet side heating means which is installed on the downstream side of the natural evaporative humidifier and heats the air flow passing through the humidifier humidified by the natural evaporative humidifier, and the heat exchanger and the inlet side heating means. From the inlet temperature detecting means installed to detect the inlet temperature of the air stream passing through the humidifying device, the outlet temperature detecting means installed downstream of the outlet side heating means to detect the outlet temperature of the air stream passing through the humidifying device, and the humidity detecting means. The heating amount of the inlet side heating means is controlled according to the output of the humidifying control device, and the heating amount of the outlet side heating means is controlled according to the output of the inlet temperature detecting means and the outlet temperature detecting means. There is.

[0016]

The air conditioner of the present invention comprises the inlet side heating means for heating the air flow passing through the heat exchanger, which is installed between the heat exchanger and the natural evaporative humidifier, and which is heated by the heat exchanger. Humidity detecting means for detecting the humidity of the, the outlet side heating means for heating the air flow passing through the humidifier installed in the downstream side of the natural evaporative humidifier and humidified by the natural evaporative humidifier, and the downstream of the outlet side heating means Is installed on the side of the humidifier and controls the heating amount of the inlet side heating means according to the output from the outlet temperature detecting means for detecting the outlet temperature of the air flow passing through the humidifying means, and the output of the outlet temperature detecting means. Since it is provided with a humidification control device for controlling the heating amount of the outlet side heating means, the air flow passing through the natural evaporation type humidifying device is heated and the temperature can be increased to increase the humidification amount, and , Natural evaporation type according to the air condition It is possible to control the heating amount i.e. humidification amount of the air flow passing through the device.

Furthermore, by reheating the air flow whose temperature has decreased due to humidification, even if the amount of humidification increases, the blowing temperature of the air conditioner can be increased conversely without decreasing, and the blowing temperature is restricted. Not only can humidification be performed without being performed, but also the blowing temperature can be controlled to prevent the blowing temperature from excessively increasing or decreasing.

Further, an inlet side heating means installed between the heat exchanger and the natural evaporation type humidifying device for heating the air flow passing through the heat exchanger that has been heat-exchanged by the heat exchanger, and a humidity detecting the humidity of the air. Detecting means, outlet side heating means installed downstream of the natural evaporative humidifier and heating the humidifier passing air flow humidified by the natural evaporative humidifier, and installed between the heat exchanger and inlet side heating means The inlet temperature detecting means for detecting the inlet temperature of the air flow passing through the humidifier, the outlet temperature detecting means installed downstream of the outlet side heating means for detecting the outlet temperature of the air passing through the humidifier, and the humidity detecting means Since the heating amount of the inlet side heating means is controlled according to the output and the heating amount of the outlet side heating means is controlled according to the output of the inlet temperature detecting means and the outlet temperature detecting means, the blowout temperature is provided. Added without being constrained by The amount increases and the humidification amount control can be performed.

Further, not only can the blowout temperature of the air conditioner be controlled to prevent the blowout temperature from rising or falling excessively, but the rise of the blowout temperature during the cooling operation can be prevented as compared with the case where no natural evaporative humidifier is installed. However, during the heating operation, heating can be assisted by preventing the blowout temperature from decreasing and further increasing the blowout temperature.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of an air conditioner according to the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional one are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a side view showing a schematic structure of an air conditioner according to a first embodiment of the present invention. FIG. 2 is a control block diagram of the humidification control in the embodiment. FIG.
It is a flow chart which shows the humidification control method by the example.

In FIG. 1, reference numeral 10 is an electric heater or auxiliary heat installed between the heat exchanger 2 and the natural evaporative humidifier 5 for heating the air stream 6 passing through the heat exchanger that has been heat-exchanged by the heat exchanger 2. It is an inlet side heating means composed of an exchanger, and preferably one or more electric heaters such as a nichrome wire heater and a PTC heater can be used. Reference numeral 11 denotes a humidity detecting means, for which a humidity sensor or the like can be used, and it is desirable to install the humidity detecting means in a room to be humidified, a suction port of the air conditioner 1, or the like.

Numeral 12 is an outlet side heating means which is installed on the downstream side of the natural evaporative humidifier 5 and which heats the air flow 8 passing through the humidifier humidified by the natural evaporative humidifier 5 by an electric heater or an auxiliary heat exchanger. Yes, preferably one or more electric heaters such as a nichrome wire heater and a PTC heater can be used. Reference numeral 13 is an outlet temperature detecting means which is installed on the downstream side of the outlet side heating means 12 and detects the outlet temperature of the air flow 8 passing through the humidifier, and a temperature sensor such as a thermistor or a thermocouple can be used. Reference numeral 14a controls the heating amount of the inlet side heating means 10 based on the output of the humidity detecting means 11 and the outlet temperature detecting means 1
The humidification control device controls the heating amount of the outlet side heating means 12 based on the output of No. 3.

As shown in FIG. 2, the humidification controller 14a compares the humidity detected by the humidity detecting means 11 with the set humidity, and sets the temperature detected by the outlet temperature detecting means 13 in a set temperature range, that is, a set temperature range. An arithmetic unit 15a that compares the upper limit temperature and the set lower limit temperature, an inlet side heating amount control unit 16a that controls the heating amount of the inlet side heating means 10, and an outlet side heating amount control that controls the heating amount of the outlet side heating means 12. Part 17
It consists of a.

Here, the set humidity is preferably in the range of 40 to 60% relative humidity, which is called proper humidity, and usually 50%. Further, the set temperature range is a temperature range that does not give an uncomfortable feeling to the occupants, and changes depending on the operating state of the air conditioner 1, but for example, 5 to 20 ° C during cooling operation and 30 to 45 ° C during heating operation. Can be set. As a method for controlling the heating amount, for example, when using a single electric heater as the heating means, there is a method of changing the energization time, increasing or decreasing the energization voltage, or, for example, when using a plurality of electric heaters as the heating means,
There is a method of increasing / decreasing the number of electric heaters to be energized or increasing / decreasing the energization voltage to the electric heaters.

The operation of the air conditioner configured as described above will be described below with reference to the flowchart of FIG. First, the blower means 3 ventilates the heat exchanger 2 to perform heat exchange between the heat exchanger 2 and the heat exchanger passing air flow 6,
The heat exchanger passing air flow 6 is heated during the heating operation, and the heat exchanger passing air flow 6 is cooled during the cooling operation. Then, the inlet side heating means 10 heats the heat exchanger passing air flow 6.

Along with this, the temperature of the air flow 8 passing through the humidifying device divided by the diversion means 7 also rises, and the amount of heat given to the water held inside the natural evaporation type humidifying device 5 as heat of vaporization increases. The evaporation of sushi water can be promoted and the amount of evaporation of water, that is, the amount of humidification can be increased, but the heat of vaporization is deprived along with humidification, and the temperature drops. The temperature of the humidifier passage air stream 8, that is, the blown air stream 9 can be raised by heating the humidifier passage air stream 8 whose temperature has dropped by using the outlet side heating means 12.

Here, the set temperature range, that is, the set upper limit temperature T ₁ and the set lower limit temperature T ₂ are set according to the operating state of the air conditioner 1 (step 1). Next, the humidity h of the air is detected by the humidity detecting means 11 (step 2) and compared with the set humidity H in the calculation unit 15a (step 3), and when H <h (step 4 is branched to the YES side). The heating amount of the inlet side heating means 10 is reduced by the inlet side heating amount control unit 16a (step 6). Then, since the temperature of the heat exchanger passing air flow 6, that is, the humidifying device passing air flow 8 decreases due to the decrease of the heating amount of the inlet side heating means 10, the water retained inside the natural evaporation type humidifying device 5 is reduced. In contrast, the amount of heat given as heat of vaporization decreases. As a result, the amount of humidification can be reduced.

When H> h (step 5 is Y
(Branch to ES side), and increase the heating amount of the inlet side heating means 10 by the inlet side heating amount control unit 16a (step 7).
As a result, the temperature of the heat exchanger passing air flow 6, that is, the temperature of the humidifying device passing air flow 8 rises, and the amount of heat given to water as heat of vaporization increases. As a result, the amount of humidification can be increased.

Next, the outlet temperature t of the air flow 8 passing through the humidifying device
Is detected by the outlet temperature detecting means 13 (step 8),
In the calculation unit 15a, the set temperature range T, that is, the set upper limit temperature T ₁ and the set lower limit temperature T ₂ are compared (step 9), and when T ₁ <t (step 10 is branched to the YES side), the outlet side heating amount control is performed. The heating amount of the outlet side heating means 12 is reduced by the portion 17a (step 12). Then, the temperature of the air flow 8 passing through the humidifying device decreases due to the decrease in the heating amount of the outlet side heating means 12, so that the temperature of the blown air flow 9 can be decreased.

When T ₂ > t (step 11)
Is branched to the YES side), and the heating amount of the outlet side heating means 12 is increased by the outlet side heating amount control unit 17a (step 1).
3). As a result, the temperature of the blown air stream 9 can be raised.

As described above, in the air conditioner of this embodiment, the inlet side heating means 10 for heating the heat exchanger passing air flow 6 that has been heat-exchanged by the heat exchanger 2, and the humidity detection for detecting the humidity of the air. Means 11, outlet side heating means 12 installed downstream of the natural evaporative humidifier 5 for heating the humidifier passing air stream 8 humidified by the natural evaporative humidifier 5, and downstream of the outlet side heating means 12. Outlet temperature detecting means 13 for detecting the outlet temperature of the air flow 8 passing through the humidifying device, and the humidity detecting means 1
The heating amount of the inlet side heating means 10 is controlled according to the output of 1,
Further, since the humidifying control device 14a for controlling the heating amount of the outlet side heating means 12 is provided based on the output of the outlet temperature detecting means 13, not only the humidifying amount can be increased but also the humidifying amount can be controlled. .

Further, since the blowing temperature can be raised by reheating the air flow whose temperature has decreased due to humidification, the humidifying amount can be increased without being restricted by the blowing temperature. In addition, it is possible to perform humidification during heating operation with an air conditioner having the same capacity as when the natural evaporation type humidifier 5 is not installed. In addition, the discomfort of the person in the room can be eliminated. Furthermore, it is possible to prevent an excessive rise and an excessive decrease in the blowing temperature.

Further, since the air flow after humidification is heated, there is also an advantage that dew condensation in the air conditioner can be reduced.

In this embodiment, as the heating means on the inlet side of the humidifying device, the inlet side heating means 10 for heating the heat exchanger passing air flow 6 heat-exchanged by the heat exchanger 2 is used. By using the heating means for heating only the passing air flow 8, the flow rate of air to be heated is small, so that at least the same effect can be obtained in the amount of heat required for heating.

Next, a second embodiment of the air conditioner according to the present invention will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 4 is a side view showing the schematic construction of the air conditioner according to the second embodiment of the present invention. FIG. 5 is a control block diagram of humidification control in the embodiment. FIG.
It is a flow chart which shows the humidification control method by the example.

In FIG. 4, reference numeral 18 denotes an inlet temperature detecting means installed between the heat exchanger 2 and the inlet side heating means 10 for detecting the inlet temperature of the air flow 8 passing through the humidifier, preferably a thermistor, a thermocouple or the like. Temperature sensors can be used. 1
4b controls the heating amount of the inlet side heating means 10 based on the output of the humidity detecting means 11, and the outlet side heating means 12 based on the outputs of the inlet temperature detecting means 18 and the outlet temperature detecting means 13.
Is a humidification control device for controlling the heating amount of.

As shown in FIG. 5, the humidification controller 14b compares the humidity detected by the humidity detecting means 11 with the set humidity, and the temperature detected by the outlet temperature detecting means 13 and the set temperature range, that is, the set temperature range. The heating amount of the inlet side heating means 10 is controlled by a calculation unit 15b that calculates the difference between the temperature detected by the upper inlet temperature detecting means 18 and the temperature detected by the outlet temperature detecting means 13 in comparison with the upper limit temperature and the set lower limit temperature. It comprises an inlet side heating amount control unit 16b and an inlet side heating amount control unit 17b which controls the heating amount of the outlet side heating means 12.

Here, the set humidity is preferably in the range of 40 to 60% relative humidity, which is called proper humidity, and usually 50%. Further, the set temperature range is a temperature range that does not give an uncomfortable feeling to the occupants, and changes depending on the operating state of the air conditioner 1, but for example, 5 to 20 ° C. during cooling operation and 30 to 45 during heating operation. Can be set to ℃.

As a method of controlling the heating amount, for example, when a single electric heater is used as the heating means, there are methods of changing the energization time and increasing / decreasing the energization voltage. For example, a plurality of electric heaters are heated. When used as a means, there is a method of increasing / decreasing the number of electric heaters to be energized or increasing / decreasing energization voltage to the electric heaters.

The operation of the air conditioner configured as described above will be described below with reference to the flowchart of FIG.

The amount of humidification is increased by heating the heat exchanger passing air flow 6 that has been heat-exchanged by the heat exchanger 2 by the inlet side heating means 10, and the humidifying device passing air flow 8 is increased by the outlet side heating means 12. The heating temperature raises the blowing temperature.

Here, the set temperature range, that is, the set upper limit temperature T ₁ and the set lower limit temperature T ₂ are set according to the operating state of the air conditioner 1 (step 21). Next, the humidity h of the air is detected by the humidity detecting means 11 (step 2
2) Comparing with the set humidity H in the calculation unit 15b (step 23), when H <h (YES in step 24)
Side branch), and the heating amount of the inlet side heating means 10 is reduced by the inlet side heating amount control unit 16b (step 26). Then, since the heating amount of the inlet side heating means 10 is reduced, the heat exchanger passing air flow 6, that is, the humidifying device passing air flow 8 is passed.
Since the temperature decreases, the amount of heat given to the water held inside the natural evaporation type humidifier 5 as heat of vaporization decreases. As a result, the amount of humidification can be reduced.

When H> h (step 25 is branched to the YES side), the heating amount of the inlet side heating means 10 is increased by the inlet side heating amount control section 16b (step 2).
7). As a result, the temperature of the heat exchanger passing air flow 6, that is, the temperature of the humidifying device passing air flow 8 rises, and the amount of heat given to water as heat of vaporization increases. As a result, the amount of humidification can be increased.

Next, the outlet temperature t of the air flow 8 passing through the humidifier is t.
_Out is detected by the outlet temperature detecting means 13 (step 2
8) Compared with the set temperature range, that is, the set upper limit temperature T ₁ and the set lower limit temperature T ₂ in the calculation unit 15b (step 29), when T ₁ <t _out (YES in step 30).
Side branch), and the heating amount of the outlet side heating means 12 is reduced by the outlet side heating amount control unit 17b (step 32). Since the heating amount of the outlet side heating means 12 is reduced, the temperature of the humidifier passing air flow 8 is lowered, so that the temperature of the blown air flow 9 can be lowered and kept within the set range.

When T ₂ > t _out (step 3)
1 is branched to the YES side), and the heating amount of the outlet side heating means 12 is increased by the outlet side heating amount control unit 17b (step 33). As a result, the temperature of the blown air flow 9 can be raised and kept within the set temperature range.

Here, when T ₂ ≤t _out ≤T _1, that is, the blowout temperature is within the set temperature range (steps 30 and 31 are branched to the NO side), the humidifier passing air flow 8
The inlet temperature t _in detected by the inlet temperature detecting means 18 (step 34), calculates a temperature difference t _in -t _out of the inlet and outlet temperatures in the arithmetic unit 15b (Step 3
5), a cooling operation (branch when the step 36 branches to YES side) and a t _in -t _out <0 (steps 38 to YES side), the outlet side heating means by the outlet-side heat amount controller 17b 12 Decrease the heating amount (step 3)
9).

By reducing the heating amount of the outlet side heating means 12, it is possible to prevent the blowing temperature from rising above the temperature before passing through the natural evaporation type humidifying device 5 during the cooling operation, that is, the natural evaporation type. As compared with the case where the humidifying device 5 and the outlet side heating means 12 are not installed, the blowing temperature can be prevented from rising.

Further, the heating operation is being performed (step 37: Y
When branching to ES side) and t _in −t _out ≧ 0 (branching to step 40 to YES side), outlet side heating amount control unit 17
By increasing the heating amount of the outlet side heating means 12 by b (step 41), it is possible to prevent the blowing temperature from lowering than the temperature before passing through the natural evaporation type humidifying device 5 during the heating operation, that is, the natural evaporation type. As compared with the case where the humidifying device 5 and the outlet-side heating means 12 are not installed, not only the blowout temperature can be prevented from lowering, but the blowout temperature can be further raised to assist heating.

As described above, in the air conditioner of this embodiment, the inlet side heating means 10 for heating the heat exchanger passing air flow 6 that has been heat-exchanged by the heat exchanger 2, and the humidity detection for detecting the humidity of the air. Means 11, an outlet side heating means 12 installed downstream of the natural evaporation type humidifying device 5 for heating the humidifying device passing air flow 8 humidified by the natural evaporation type humidifying device 5, a heat exchanger 2 and an inlet side heating An inlet temperature detecting means 18 which is installed between the means 10 and detects an inlet temperature of the humidifying device passing air stream 8 and an outlet temperature of the humidifying device passing air stream 8 which is installed downstream of the outlet side heating means 12. The heating amount of the humidifier position mouth side heating means 10 is controlled based on the outputs of the outlet temperature detecting means 13 and the humidity detecting means 11, and based on the outputs of the inlet temperature detecting means 18 and the outlet temperature detecting means 13. Outlet side heating means 12
Since the humidification control device 14b for controlling the heating amount of the air conditioner is provided, not only is it possible to increase the humidification amount and control the humidification amount without being restricted by the blowing temperature, but also to control the blowing temperature of the air conditioner to blow the air. It is possible to prevent an excessive rise or fall in temperature.

Furthermore, in the cooling operation, the blowing temperature is prevented from rising compared with the case where the natural evaporation type humidifying device and the heating means are not installed, and in the heating operation, the blowing temperature is prevented from decreasing. It is also possible to assist heating by further raising the blowing temperature.

In the present embodiment, as the heating means on the inlet side of the humidifying device, the inlet side heating means 10 for heating the heat exchanger passing air flow 6 heat-exchanged by the heat exchanger 2 is used. By using the heating means for heating only the passing air flow 8, the flow rate of air to be heated is small, so that at least the same effect can be obtained in the amount of heat required for heating.

[0054]

As described above, according to the present invention, the heat exchanger, the air blowing means, the natural evaporative humidifier, and the heat exchanger passing air installed between the heat exchanger and the natural evaporative humidifier. An inlet side heating means for heating the flow, a humidity detecting means for detecting the humidity of the air, and an outlet for heating the air flow passing through the humidifier installed at the downstream side of the natural evaporative humidifier and humidified by the natural evaporative humidifier. Side heating means, outlet temperature detecting means installed downstream of the outlet side heating means for detecting the outlet temperature of the air flow passing through the humidifying device, and the heating amount of the inlet side heating means is controlled based on the output of the humidity detecting means. In addition, by providing a humidification control device that controls the heating amount of the outlet side heating means based on the output of the outlet temperature detection means, not only can the amount of humidification be increased and the amount of humidification can be controlled, but also natural evaporation with humidification Temperature passes through the humidifier Increase in the humidification amount without being constrained to outlet temperature it is possible to raise the outlet temperature of the air conditioner by heating the beat air flow becomes possible.

In addition, the blowing temperature can be controlled to prevent the blowing temperature from excessively increasing or decreasing.

Further, a heat exchanger, a blowing means,
A natural evaporative humidifier, an inlet side heating means installed between the heat exchanger and the natural evaporative humidifier to heat the air flow passing through the heat exchanger, a humidity detecting means for detecting the humidity of the air, and a natural evaporative evaporator. Outlet heating means installed downstream of the humidifier to heat the humidifier passing air stream humidified by the natural evaporation humidifier, and the humidifier passage air flow installed between the heat exchanger and inlet heater Inlet temperature detecting means for detecting the inlet temperature of the heating means, outlet temperature detecting means for detecting the outlet temperature of the air flow passing through the humidifying device installed on the downstream side of the heating means, and inlet side heating means based on the output of the humidity detecting means. By providing a humidification control device that controls the heating amount of the outlet side heating means based on the outputs of the inlet temperature detecting means and the outlet temperature detecting means, the humidifying amount is not restricted by the blowing temperature. Increase and humidification Together is possible, it is possible to control the outlet temperature and to prevent excessive blowout temperature rise during excessive discharge temperature drop and cooling operation during the heating operation.

Further, as compared with the case where the natural evaporative humidifier is not installed, the temperature of the blowing air is prevented from increasing during the cooling operation, and the temperature of the blowing air is prevented from lowering during the heating operation. You can

[Brief description of drawings]

FIG. 1 is a side view showing a schematic configuration of a first embodiment of an air conditioner according to the present invention.

FIG. 2 is a control block diagram of humidification control in the embodiment.

FIG. 3 is a flowchart showing a humidification control method in the embodiment.

FIG. 4 is a side view showing a schematic configuration of a second embodiment of the air conditioner according to the present invention.

FIG. 5 is a control block diagram of humidification control in the embodiment.

FIG. 6 is a flowchart showing a humidification control method in the same embodiment.

FIG. 7 is a side view showing a schematic configuration of a conventional air conditioner.

[Explanation of symbols]

 2 Heat Exchanger 3 Blower Means 5 Natural Evaporative Humidifier 6 Heat Exchanger Passing Air Flow 8 Humidifying Device Passing Air Flow 10 Inlet Side Heating Means 11 Humidity Detecting Means 12 Outlet Side Heating Means 13 Outlet Temperature Detecting Means 14a, 14b Humidification Control Device 18 Inlet temperature detection means

Claims (7)

[Claims] 1. A natural-evaporation type heat exchanger that humidifies by passing a part of a heat exchanger-passing air flow that has been heat-exchanged by the heat exchanger, a blowing means for ventilating the heat exchanger, and the heat exchanger. Humidifier, inlet side heating means installed between the heat exchanger and the natural evaporation type humidifier to heat the air flow passing through the heat exchanger, humidity detecting means for detecting the humidity of the air,
An outlet-side heating means installed downstream of the natural-evaporative humidifier and heating the humidifier passing air stream humidified by the natural-evaporative humidifier, and the humidifier installed downstream of the outlet-side heating means. Outlet temperature detecting means for detecting the outlet temperature of the passing air flow, controlling the heating amount of the inlet side heating means according to the output from the humidity detecting means, and according to the output from the outlet temperature detecting means An air conditioner comprising: a humidification control device that controls a heating amount of the outlet side heating means. 2. The humidification control device controls the heating amount of the inlet side heating means so that the humidity of the air detected by the humidity detecting means becomes a predetermined humidity, and the outlet side heating means keeps the outlet temperature within a predetermined range. The air conditioner according to claim 1, wherein the heating amount of the air conditioner is controlled. 3. The air conditioner according to claim 1, wherein the inlet side heating means heats only the air flow passing through the humidifying device. 4. A natural evaporative system for humidifying by passing a part of a heat exchanger passing air flow that has been heat-exchanged by the heat exchanger, a blower means for ventilating the heat exchanger. Humidifier, inlet side heating means installed between the heat exchanger and the natural evaporation type humidifier to heat the air flow passing through the heat exchanger, humidity detecting means for detecting the humidity of the air,
Between the heat exchanger and the inlet side heating means, which is installed on the downstream side of the natural evaporative humidifier and which heats the humidifier passing air stream humidified by the natural evaporative humidifier. An inlet temperature detecting means installed to detect an inlet temperature of the humidifier passing air flow, an outlet temperature detecting means installed downstream of the outlet side heating means to detect an outlet temperature of the humidifier passing air flow, and Humidification control for controlling the heating amount of the inlet side heating means according to the output from the humidity detecting means, and controlling the heating amount of the outlet side heating means according to the outputs of the inlet temperature detecting means and the outlet temperature detecting means. An air conditioner equipped with a device. 5. The humidification control device controls the heating amount of the inlet side heating means so that the humidity of the air detected by the humidity detecting means becomes a predetermined humidity, and further, the outlet temperature falls within a predetermined range and the inlet temperature. 5. The heating amount of the outlet side heating means is controlled according to the temperature difference between the outlet temperature and the outlet temperature.
Air conditioner described. 6. The humidification control device controls the heating amount of the inlet side heating means so that the humidity of the air detected by the humidity detecting means becomes a predetermined humidity, and further, the outlet temperature falls within a predetermined range and the cooling operation is performed. The air conditioner according to claim 4, wherein the heating amount of the outlet side heating means is controlled so that the inlet temperature is sometimes higher than the outlet temperature and the inlet temperature is lower than the outlet temperature during the heating operation. 7. The air conditioner according to claim 4, wherein the outlet side heating means heats only the air flow passing through the humidifying device.