JPH07293951A - Air conditioner - Google Patents

Abstract

PURPOSE:To increase a humidifying quantity in an air conditioner having a natural evaporation type humidifier for preventing drying of the indoor air. CONSTITUTION:The air conditioner comprises a heat exchanger 2, air supply means 3 for ventilating to the exchanger 2, a natural evaporation type humidifier 5 for humidifying by passing part of heat exchanger passing air flow 9, and heating means 9a for heating heat exchanger passing air flow 6 heat exchanged with the exchanger 2, i.e., humidifier passing air flow 8 to increase a humidifying quantity.

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 aspect of comfort of the indoor environment, it is necessary to maintain an appropriate humidity of 40 to 60% relative humidity, and it is an increasingly small humidifier with a large humidifying capacity and a humidifier whose humidification amount 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. 9 is a side view showing a schematic configuration of a conventional air conditioner. In FIG. 9, 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.

[0008]

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.

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

Further, in the above-mentioned conventional structure, the amount of humidification greatly depends on the temperature / humidity state of the air to be humidified, so that the amount of humidification cannot be controlled freely.

Another object of the present invention is to provide an air conditioner capable of controlling the amount of humidification.

[0012]

In order to achieve this object, the air conditioner of the present invention has a heating means for heating an air flow passing through a heat exchanger that has been heat-exchanged by a heat exchanger and a natural evaporation type heat exchanger. It is configured to be provided between the humidifying device.

Further, the heating means for heating only the air flow passing through the humidifying device that passes through the natural evaporative humidifying device out of the air flow passing through the heat exchanger that has been heat-exchanged by the heat exchanger and the natural evaporative humidifying device. It has a structure provided between the device and the device.

Further, the air conditioner of the present invention comprises heating means installed between the heat exchanger and the natural evaporative humidifying device for heating the air stream passing through the heat exchanger that has been heat-exchanged by the heat exchanger, and air. The humidity detecting means for detecting the humidity of the above, and the humidification amount control device for controlling the heating amount of the heating means according to the output from the humidity detecting means.

Further, 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 has been heat-exchanged by the heat exchanger, and the temperature of the blown air flow are detected. And a blow-out temperature control device for controlling the heating amount of the heating means according to the output from the temperature detecting means.

[0016]

The air conditioner of the present invention is equipped with a heating means for heating the air stream passing through the heat exchanger, which has been heat-exchanged by the heat exchanger, between the heat exchanger and the natural evaporative humidifier. The air flow passing through the evaporative humidifier is heated to raise the temperature, and the amount of humidification can be increased.

Further, the air conditioner of the present invention heat-exchanges the heating means for heating only the air flow passing through the humidifying device, which passes through the natural evaporative humidifying device, of the air flow passing through the heat exchanger which has been heat-exchanged by the heat exchanger. Since it is provided between the container and the natural evaporation type humidifying device, at least the amount of heat required for heating is increased by heating the air flow passing through the humidifying device and increasing the temperature, thereby increasing the amount of humidification.

Further, a 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 has been heat-exchanged by the heat exchanger, and a humidity detecting the humidity of the air. Since it is equipped with a detection unit and a humidification amount control device that controls the heating amount of the heating unit according to the output from the humidity detection unit, not only the humidification amount is increased, but also the natural evaporation type according to the state of the air. It is possible to control the heating amount of the air flow passing through the humidifying device, that is, the humidifying amount.

Further, a heating means installed between the heat exchanger and the natural evaporation type humidifying device for heating the air stream passing through the heat exchanger that has been heat-exchanged by the heat exchanger, and a temperature for detecting the temperature of the blown air stream. Since it is equipped with a detection unit and a humidification amount control device that controls the heating amount of the heating unit according to the output from the temperature detection unit, it not only increases the humidification amount but also controls the blowout temperature of the air conditioner. It is possible to prevent an excessive decrease in the blowing temperature during the heating operation and an excessive increase in the blowing temperature during the cooling operation.

[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. In FIG.
Reference numeral 9a is a heating means installed between the heat exchanger 2 and the natural evaporation type humidifying device 5 for heating the heat exchanger passing air flow 6 that has been heat-exchanged by the heat exchanger 2, and is preferably composed of an electric heater. For example, one or a plurality of nichrome wire heaters, PTC heaters, etc. can be used.

The operation of the air conditioner configured as above will be described below. First, the air blower 3 ventilates the heat exchanger 2, and the heat exchanger 2 and the airflow 6 passing through the heat exchanger 6 are passed.
And heat exchange between them and heat the heat exchanger passing airflow 6 during the heating operation and cool the heat exchanger passing airflow 6 during the cooling operation. Here, the air flow 6 passing through the heat exchanger is heated by the heating means 9a. Along with this, the temperature of the humidifying device passing air flow 8 divided by the dividing device 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 and the water Evaporation is accelerated. As a result, the amount of evaporation of water, that is, the amount of humidification can be increased.

As described above, in the air conditioner of this embodiment, the airflow 6 passing through the heat exchanger, which is installed between the heat exchanger 2 and the natural evaporative humidifier 5, is heat-exchanged by the heat exchanger 2. Since the heating means 9a for heating is provided, the amount of humidification can be increased.

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. 2 is a side view showing a schematic configuration of an air conditioner according to the second embodiment of the present invention. In FIG.
9b is a heating means installed between the heat exchanger 2 and the natural evaporative humidifier 5 to heat only the humidifier passing air flow 8 of the heat exchanger passing air flow 6 that has been heat-exchanged by the heat exchanger 2. Preferably, it is composed of an electric heater, and for example, a nichrome wire heater, a PTC heater or the like can be used singly or plurally.

The operation of the air conditioner will be described below. First, the air blower 3 ventilates the heat exchanger 2 to exchange heat between the heat exchanger 2 and the heat exchanger passing air flow 6, and heats the heat exchanger passing air flow 6 during heating operation, and performs cooling operation. Sometimes the heat exchanger passing air stream 6 is cooled. Here, the heating means 9b heats only the humidifier passage air stream 8 which is divided by the flow dividing means 7. Along with this, since the flow rate of air to be heated is small, at least the amount of heat required for heating sufficiently rises the temperature of the air flow 8 passing through the humidifier, and the amount of humidification can be increased.

Further, of the airflow 6 passing through the heat exchanger, the airflow that does not pass through the natural evaporation type humidifying device 5 is not heated, so that there is also an advantage that the rise of the blowout temperature during the cooling operation is suppressed.

As described above, the air conditioner of this embodiment is installed between the heat exchanger 2 and the natural evaporative humidifier 5, and the heat exchanger passing air flow 6 that has been heat-exchanged by the heat exchanger 2 is installed. Since the heating means 9b for heating only the air flow 8 passing through the humidifying device is provided, the amount of heat required for heating can be increased at least by the amount of humidification.

Next, a third 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 and second embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a side view showing the schematic construction of an air conditioner according to the third embodiment of the present invention. FIG. 4 is a control block diagram of humidification amount control in the embodiment. Figure 5
3 is a flowchart showing a humidification amount control method according to the embodiment.

In FIG. 3, reference numeral 10 is a humidification amount control device for controlling the heating amount of the heating means 9a based on the output of the humidity detecting means (not shown). A humidity sensor or the like can be used as the humidity detecting means, and it is desirable that the humidity detecting means is installed in a room to be humidified, a suction port of the air conditioner 1, or the like. As shown in FIG. 4, the humidification amount control device 10 includes a calculation unit 12 that compares the humidity detected by the humidity detection unit 11 with the set humidity,
The heating amount control unit 13 controls the heating amount of the heating means 9a. As a heating amount control method, for example, when a plurality of electric heaters are used as the heating means, the number of electric heaters to be energized is increased or decreased, or the electric heaters are used. There is a method of increasing or decreasing the energization voltage to the.

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 air stream 6 passing through the heat exchanger that has been heat-exchanged by the heat exchanger 2 by the heating means 9a. Here, the humidity h of the air is measured by the humidity detecting means 11
Is detected (step 1) by the calculation unit 12 and compared with the set humidity H (step 2). When H <h (branch step 3 to YES side), the heating amount controller 13 heats the heating means 9a. Decrease the amount (step 5).

Since the heating amount of the heating means 9a is decreased, the temperature of the airflow 6 passing through the heat exchanger, that is, the airflow 8 passing through the humidifying device is lowered.
The amount of heat given as heat of vaporization to the water held inside is reduced. As a result, the amount of humidification can be reduced.

When H> h (step 4 is Y
(Branch to ES side), heating means 9a by the heating amount control unit 13
Increase the heating amount (step 6). 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.

As described above, in the air conditioner of this embodiment, the heating means 9a for heating the heat exchanger passing air flow 6 that has been heat-exchanged by the heat exchanger 2 and the humidity detecting means 11 for detecting the humidity of the air. And the heating means 9 according to the output of the humidity detecting means 11.
Since the humidifying amount control device 10 for controlling the heating amount of a is provided, not only the humidifying amount can be increased but also the humidifying amount can be controlled.

In this embodiment, as the heating means, the heating means 9a for heating the heat exchanger passing air stream 6 which has been heat-exchanged by the heat exchanger 2 is used, but only the humidifier passing air stream 8 is heated. The same effect can be obtained by using heating means.

Next, a fourth 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, second and third embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 6 is a side view showing the schematic construction of an air conditioner according to the fourth embodiment of the present invention. FIG. 7 is a control block diagram of the outlet temperature control in the same embodiment.
FIG. 8 is a flow chart showing the method for controlling the temperature of blown air according to the embodiment.

In FIG. 6, 14 is a blown air flow of the air conditioner 1, and 15 is a temperature detection means for detecting the temperature of the blown air flow 14, preferably a temperature sensor such as a thermocouple or thermistor can be used. 16 is a temperature detecting means 1
5 is a blow-out temperature control device that controls the heating amount of the heating means 9a based on the output of 5. Blowout temperature control device 16
As shown in FIG. 4, the heating unit includes a calculation unit 17 for comparing the temperature detected by the temperature detection unit 15 with the set temperature, and a heating amount control unit 18 for controlling the heating amount of the heating unit 9a. As a quantity control method, for example, when a plurality of electric heaters are used as the heating means, there is a method of increasing or decreasing the number of electric heaters to be energized or increasing or decreasing an 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 in the heat exchanger 2 by the heating means 9a. Here, the temperature t of the blown air flow 14 is detected by the temperature detection means 15 (step 11), and when the heating operation is being performed (step 12 is branched to the YES side), the heating blowout lower limit set temperature T ₁ is set in the calculation unit 17. Compare (step 13) and when t <T ₁ (step 14)
Is branched to the YES side), and the heating amount control section 18 increases the heating amount of the heating means 9a (step 15).

As the heating amount of the heating means 9a increases, the temperature of the heat exchanger passing air flow 6, that is, the humidifying device passing air flow 8 rises. As a result, it is possible to prevent a decrease in the room temperature due to a decrease in the temperature of the blown air stream 14 due to heat applied to water as heat of vaporization.

Further, in the case of the cooling operation (step 12 is branched to the NO side), the calculation unit 17 compares it with the cooling blowout upper limit set temperature T ₂ (step 16), and when t> T ₂ (step 17: (The flow branches to the YES side), and the heating amount control unit 18 decreases the heating amount of the heating means 9a (step 18).

As the heating amount of the heating means 9a is reduced, the temperature of the heat exchanger passing air flow 6, that is, the humidifying device passing air flow 8 is lowered. As a result, it is possible to prevent the room temperature from rising as the temperature of the blown air stream 14 rises excessively.

As described above, in the air conditioner of this embodiment, the heating means 9a for heating the heat exchanger passing airflow 6 that has been heat-exchanged by the heat exchanger 2 and the temperature for detecting the temperature of the blown airflow 14 are detected. Since the detection unit 15 and the blowing temperature control device 16 for controlling the heating amount of the heating unit 9a according to the output of the temperature detection unit 15 are provided, not only the humidification amount is increased, but also the temperature of the blowing air flow 14 is increased. It is possible to prevent control, that is, an excessive drop in outlet temperature during heating operation and an excessive rise in outlet temperature during cooling operation.

In this embodiment, as the heating means, the heating means 9a for heating the heat exchanger passing air stream 6 that has been heat-exchanged by the heat exchanger 2 is used, but only the humidifying device passing air stream 8 is heated. The same effect can be obtained by using heating means.

[0048]

As described above, according to the present invention, the heat exchanger, the blowing means, the natural evaporative humidifier, and the heating means for heating the air flow passing through the heat exchanger are the heat exchanger and the natural evaporative humidifier. Since it is provided between the heat exchanger and the device, the air flow passing through the heat exchanger, that is, the air flow passing through the humidifying device is heated, and the amount of heat given to the water held in the natural evaporation type humidifying device as heat of vaporization increases to promote evaporation. Therefore, the amount of humidification can be increased.

Further, a heat exchanger, a blowing means,
Since the natural evaporative humidifier and the heating means for heating only the air flow passing through the humidifier are provided between the heat exchanger and the natural evaporative humidifier, the amount of heat required for heating is at least the temperature of the air flow passing through the humidifier. The amount of humidification can be increased.

Further, according to the present invention, the heat exchanger, the blowing means, the natural evaporative humidifier, and the heating installed between the heat exchanger and the natural evaporative humidifier for heating the air flow passing through the heat exchanger. Means, a humidity detecting means for detecting the humidity of the air, and a humidifying amount control device for controlling the heating amount of the heating means based on the output of the humidity detecting means, thereby increasing the humidifying amount and increasing the humidifying amount. Can be controlled.

Further, a heat exchanger, a blowing means,
Natural evaporative humidifier, heating means installed between the heat exchanger and the natural evaporative humidifier to heat the air stream passing through the heat exchanger, temperature detecting means for detecting the temperature of the blown air stream, and its temperature By providing an outlet temperature control device for controlling the heating amount of the heating means based on the output of the detection means,
The amount of humidification can be increased and the blowout temperature can be controlled to prevent an excessive drop in blowout temperature during heating operation and an excessive rise in blowout temperature during cooling operation.

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

FIG. 3 is a side view showing a schematic configuration of a third embodiment of the air conditioner according to the present invention.

FIG. 4 is a control block diagram of humidification amount control in the embodiment.

FIG. 5 is a flowchart showing a humidification amount control method in the embodiment.

FIG. 6 is a side view showing a schematic configuration of a fourth embodiment of the air conditioner according to the present invention.

FIG. 7 is a control block diagram of blowout temperature control in the embodiment.

FIG. 8 is a flowchart showing a method for controlling a blowout temperature in the embodiment.

FIG. 9 is a side view showing a schematic configuration of a conventional air conditioner.

[Explanation of symbols]

 2 heat exchanger 3 blowing means 5 humidifying device 6 heat exchanger passing air flow 8 humidifying device passing air flow 9a, 9b heating means 10 humidification amount control device 11 humidity detection means 14 blowout airflow 15 temperature detection means 16 blowout temperature control device

Claims (6)

[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. An air conditioner comprising a humidifier and heating means provided between the heat exchanger and the natural evaporation humidifier so as to heat the air flow passing through the heat exchanger. 2. A natural evaporative system in which a heat exchanger, blowing means for ventilating the heat exchanger, and a part of an air flow passing through the heat exchanger that has undergone heat exchange in the heat exchanger pass through to perform humidification. A humidifying device is provided between the heat exchanger and the natural evaporative humidifying device so as to heat only the humidifying device passing air flow passing through the natural evaporative humidifying device out of the heat exchanger passing air flow. An air conditioner consisting of heating means. 3. A natural evaporative system in which a heat exchanger, a blowing means for ventilating the heat exchanger, and a part of an air flow passing through the heat exchanger that has been heat-exchanged in the heat exchanger pass through to perform humidification. A humidifier, heating means installed between the heat exchanger and the natural evaporation type humidifier to heat the air flow passing through the heat exchanger, a humidity detecting means for detecting the humidity of the air, and the humidity detecting means. An air conditioner comprising: a humidification amount control device that controls the heating amount of the heating means according to the output from the air conditioner. 4. The air conditioner according to claim 3, wherein the heating means heats only the air flow passing through the humidifying device. 5. 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. A humidifying device, a heating means installed between the heat exchanger and the natural evaporation type humidifying device to heat the air stream passing through the heat exchanger, a temperature detecting means for detecting the temperature of the blown air stream, and the temperature. An air conditioner comprising: a blow-out temperature control device for controlling the heating amount of the heating means in accordance with the output from the detection means. 6. The air conditioner according to claim 5, wherein the heating means heats only the air flow passing through the humidifying device.