JP3157994B2 - Air conditioner with humidification function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air with a humidifying function which has a function of humidifying unnecessary water supply by adsorbing moisture in outdoor air with a hygroscopic material such as silica gel and heating and desorbing the air in indoor air. It relates to a harmonic machine.

[0002]

2. Description of the Related Art A conventional air conditioner having a built-in humidifying function of a method of adsorbing moisture in the air with a hygroscopic material includes a structure disclosed in Japanese Patent Application Laid-Open No. 5-168841. The configuration will be described with reference to FIG.

[0003] As shown in FIG. 13, a hygroscopic material 105, a heater for regeneration 106, a blower 107, and an outdoor air intake 108 are provided.
Further, an outdoor discharge port 109 is provided inside the outdoor unit 101 of the air conditioner, and the indoor intake port 113 and the outdoor discharge port 114 face the inside of the indoor unit 110 with a pipe. The moisture absorbent is stationary, and the humidification is performed by switching the air path between the intake switching damper 126 and the discharge switching damper 127. The room intake air and the room discharge air are respectively
8, the air flows on the coaxial air path, the intake-side air path 115a, and the discharge-side air path 115b.

With the above configuration, the humidifying operation is performed as follows during the heating operation in winter. First, the switching damper 126
And 127 are switched to the outdoor side, the outdoor air enters from the outdoor air inlet 108, and the moisture is adsorbed by the hygroscopic material 105,
An air path is formed that becomes dry air and is opened from the outdoor discharge port 109 to the outside of the room.

[0005] Next, the switching dampers 126 and 127 are switched to the indoor side, and the indoor air enters through the indoor air inlet 113, passes through the heated heater 106, becomes hot air, and heats the hygroscopic material 105. An air passage is formed that contains moisture desorbed from the hygroscopic material 105 and is discharged from the indoor discharge port 114 into the room. By repeating this, the room is humidified. In addition, 102 is an outdoor unit heat exchanger, 103 is an outdoor unit blowing fan, 111 is an indoor heat exchanger, and 112 is an indoor blowing fan.

[0006]

Generally, during a heating operation of a heat pump type air conditioner, a refrigerant is in an evaporating process in a heat exchanger of an outdoor unit, and the amount of heat corresponding to latent heat of evaporation is taken from ambient air to remove the refrigerant. It is heated and evaporates.
The amount of heat is taken from the sensible heat and latent heat of the air passing through the outdoor unit heat exchanger. In particular, it is a feature of the heat pump that as the outdoor air passing through the heat exchanger contains more moisture, more condensing heat can be taken in, so that the refrigerant heating is increased and the heating capacity is increased.

[0007] However, when the outside air temperature drops to near 0 ° C, the passing air from which heat has been taken becomes lower than the dew point temperature, and frost forms on the heat exchanger. Once the heat exchanger has frost, the amount of passing air is reduced, so that the cooling of the passing air is further promoted and the frost increases. Of course, as the passing air volume decreases, the heating capacity also decreases. In that case, frost formation is detected by a heat exchanger surface temperature sensor or the like, and the control microcomputer of the air conditioner suppresses or interrupts the heating operation and starts the defrosting operation, resulting in a decrease in the indoor heating capacity. Moreover, the frost formation phenomenon is more likely to occur as the air passing through the heat exchanger is lower in temperature and contains more moisture.

However, in the conventional air conditioner with a humidifying function, the above-described problem of frost formation still remains, merely by discharging the dry air generated in the humidifying process to the outside without using it. In view of the foregoing, the present invention provides an air conditioner with a humidifying function that suppresses a frosting phenomenon by utilizing dried outdoor air after absorbing moisture with a hygroscopic material as air passing through a heat exchanger of an outdoor unit. The purpose is to provide.

[0009]

In order to achieve the above object, an air conditioner with a humidifying function according to the present invention is directed to an air conditioner having a humidifying unit for adsorbing moisture of outdoor air with an outdoor unit. A processing air outlet is provided inside and for guiding dry air that has passed through the moisture absorbent to the air suction side on the windward side of the outdoor unit heat exchanger. In addition, the invention according to claim 2 provides a humidifying unit that adsorbs moisture of outdoor air with a moisture absorbent outside the outdoor unit, that is, inside the indoor unit, and uses the outdoor dry air that has passed through the moisture absorbent for the outdoor unit. A treated air outlet is provided for leading to the air suction side on the windward side of the heat exchanger.

According to a third aspect of the present invention, there is provided a humidifying unit which adsorbs moisture of outdoor air with a moisture absorbent, provided outside the outdoor unit, that is, in the middle of a piping path, and in which outdoor dry air after passing through the moisture absorbent. To the air suction side on the windward side of the outdoor unit heat exchanger. Further, the invention according to claim 4 is provided with a processing air outlet for guiding the outdoor dry air after passing through the moisture absorbent to the air suction side on the windward side of the outdoor unit heat exchanger, particularly near the lower part. I have.

Further, in the invention according to claim 5, the outdoor dry air after passing through the moisture absorbent is discharged to the air suction side on the windward side of the outdoor unit heat exchanger and in the vicinity of the lower part of the heat exchanger. A processing air discharge switching means for switching to a path other than the suction path of the exchanger, and an outside air temperature sensor and a humidity sensor are provided. Further, the invention according to claim 6 is provided with a heat transfer unit for transferring the heat of the compressor of the outdoor unit and the vicinity thereof to the desorption / regeneration air passage of the humidifying unit.

[0012]

According to the present invention having the above-mentioned construction, the invention according to claim 1 is a humidifying unit provided inside an outdoor unit, wherein dry air after absorbing moisture of outdoor air with a moisture absorbent is discharged from a processing air outlet. Since the air is discharged to the air suction side on the windward side of the outdoor unit heat exchanger and the dry air can be applied to the heat exchanger, the frost formation phenomenon can be suppressed at a low temperature. Further, the invention according to claim 2 is a humidifying unit provided inside the outdoor unit, wherein the dry air after absorbing the moisture of the outdoor air with the hygroscopic material is passed to the air suction side on the windward side of the outdoor unit heat exchanger. And the like, and the dry air can be applied to the heat exchanger from the processing air discharge port, so that frost formation can be suppressed at low temperatures.

According to a third aspect of the present invention, there is provided a humidification unit provided in the middle of a piping path, wherein the dry air obtained after the moisture of the outdoor air is adsorbed by the hygroscopic material is sucked into the air at the windward side of the outdoor unit heat exchanger. Since the drying air can be guided to the side by a ventilation means such as a ventilation pipe and the dry air can be applied to the heat exchanger from the processing air outlet, the frost formation phenomenon can be suppressed at a low temperature. Further, the invention according to claim 4 is characterized in that the outdoor dry air after passing through the hygroscopic material of the humidifying unit provided inside the outdoor unit, in the piping route or inside the outdoor unit is passed through the outdoor unit by a ventilation means such as a ventilation pipe. It is led to the air suction side on the windward side of the machine heat exchanger, especially near the lower part, and is discharged from the treated air outlet.
By the way, the dry air is lighter than the air containing moisture, and the evaporating effect of the refrigerant in the heat exchanger, that is, the cooling effect on the outdoor passing air, is lower in the lower part which is the inlet of the refrigerant with respect to the heat exchanger during the heating operation. Stronger than the top. Accordingly, when the heat exchanger is guided to the vicinity of the lower portion on the suction side in this way, the frost formation phenomenon can be more effectively suppressed.

Further, the invention with a humidifying function according to a fifth aspect of the present invention provides a humidifying unit provided inside an outdoor unit, on a piping route, or inside an outdoor unit, for passing dry air outside the outdoor unit after passing through a moisture absorbent into a ventilation pipe or the like. To the processing air discharge switching means. The outside air temperature sensor and the humidity sensor detect the outside air temperature and humidity, and when it is determined that the surface air of the heat exchanger is lower than the dew point temperature in the light of the cycle state of the heating operation at that time, the processing air discharge switching means is guided. The dried air is discharged to the air suction side on the windward side of the outdoor unit heat exchanger, particularly, near the lower portion.

On the other hand, when it is determined that the temperature does not become lower than the dew point temperature, the processing air discharge switching means discharges the introduced dry air to a place other than the air suction path of the outdoor unit heat exchanger or directly to the outside of the outdoor unit. By the way, the dry air is lighter than the air containing moisture, and the evaporating effect of the refrigerant in the heat exchanger, that is, the cooling effect on the outdoor passing air, is lower in the lower part which is the inlet of the refrigerant with respect to the heat exchanger during the heating operation. Stronger than the top.
Therefore, when the heat exchanger is guided to the vicinity of the lower portion on the suction side of the heat exchanger, the frost formation phenomenon can be more effectively suppressed.

Further, in the invention according to claim 6, since the heat of the compressor of the outdoor unit and the vicinity thereof is transmitted to the desorption / regeneration air passage by the transmission part, the desorption / regeneration air is transmitted before the regeneration heater. Can be preheated. In order to desorb and regenerate moisture from the hygroscopic material, hot air of usually 100 ° C to 140 ° C is applied. The higher the air temperature, the faster the desorption regeneration speed and the greater the desorption regeneration amount. Therefore, if preheating is performed, a large amount of water can be quickly desorbed and regenerated by a regeneration heater with low power.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner with a humidifying function according to the present invention will be described below with reference to FIGS. FIG. 1 is a main part configuration diagram showing a first embodiment (according to claim 1) of an air conditioner with a humidifying function of the present invention. In FIG. 1, reference numeral 1 denotes an indoor unit of an air conditioner, in which an indoor unit heat exchanger 4, an indoor blower 5, and the like are disposed. An outdoor unit 11 of the air conditioner includes an outdoor unit heat exchanger 14 and an outdoor blower 1 therein.
5, a humidifying unit 16 and the like are provided.

Next, a specific configuration example of the humidification unit 16 is shown in FIGS. In the case of FIG. 2, components such as a blower fan A22, a heater for regeneration 23, and a hygroscopic material 24 formed in a honeycomb shape or a corrugated shape are stored in the humidification unit 16.

First, the process of adsorbing moisture from outdoor air to the moisture absorbent 24 will be described. With the intake switching valve 20 switched to the processing air passage 50 and the exhaust switching valve 26 switched to the processing exhaust air passage 51, when the blower fan A22 rotates, outdoor air passes through the outdoor intake port 17 through the intake passage 21. It reaches the hygroscopic material 24. At this time, the regeneration heater 23 is not energized. The outdoor air, which becomes moisture while being absorbed by the moisture absorbing material 24 while passing through the moisture absorbing material 24, is discharged from the processing air outlet 18 through the processing discharge air passage 51.

After a certain period of time has passed and the moisture absorbent 24 has sufficiently adsorbed moisture, the intake switching valve 20 is connected to the desorption / regeneration air passage 9 and the exhaust switching valve 26 is connected to the regeneration / exhaust air passage 10.
When the blower fan A22 rotates in the state switched to the side, the room air reaches the regeneration heater 23 from the room intake port 6 through the intake passage 21. The indoor air heated to about 100 to 140 ° C. by the energized regeneration heater 23 passes through the desiccant 24 and desorbs moisture adsorbed on the desiccant 24, and is regenerated and discharged as wet air. The air is discharged from the regeneration air outlet 7 through the air passage 10.

After the moisture adsorbed on the hygroscopic material 24 has been desorbed after a certain period of time, the process returns to the above-described adsorption process, and the cycle of adsorption and desorption regeneration is repeated. Thus, the moisture of the outdoor air is added to the indoor air and discharged into the room to humidify the room.

In the case of FIG. 3, a cylindrical hygroscopic material 24 is provided inside the humidifying unit 16 with a rotor frame 33, and a center shaft 37 of the core is rotatably held from both sides by a bearing 38. The drive motor 30 is driven to rotate at a rotation speed of about 10 to 15 rph via a timing belt 34 and a pulley 29.

The rotor frame 33 is pressed against the partition plate 35 by an air seal member A36, and the desorption / regeneration air passage 9 is pressed against the partition plate 35 and the windward cross section of the moisture absorbent by an air seal member B28. Is air seal material C
Since the humidifying material is pressed against the leeward cross section at 27, the inside of the humidifying unit 16 does not mix the processing-side outdoor air and the regeneration-side indoor air.

When the processing-side fan 32 rotates, outdoor air enters from the outdoor intake port 17 through the processing air passage 50,
While passing through the moisture absorbent, the moisture is adsorbed by the moisture absorbent and dried.
Is discharged from The portion of the moisture-absorbing material that has absorbed the moisture is rotationally driven by the drive motor 30 and travels around the desorption / regeneration air passage surrounded by the air seal material 28.

Then, by the rotation of the regeneration side fan 31, the air is taken in from the indoor air inlet 6 through the desorption / regeneration air passage 9, and 100 to 14 while passing through the regeneration heater 23.
Indoor air heated to about 0 ° C. desorbs and regenerates moisture adsorbed on the moisture absorbent. The indoor air deprived of moisture becomes humid air and passes through the regeneration discharge air passage 10 and the regeneration air discharge port 7.
From the room. Then, the portion of the moisture absorbent from which the moisture has been desorbed is continuously driven to rotate, and desorbs moisture from the outdoor air. This cycle of adsorption and desorption is repeated to continuously humidify the indoor air.

In FIG. 1, a humidifying unit is provided inside the outdoor unit 11, and a desorption / regeneration air passage for transporting indoor air through a pipe 8 connecting the indoor unit 1 and the outdoor unit 11. 9 and the regeneration discharge air passage 10 pass through.
Of course, a copper pipe (not shown) for transporting the refrigerant and electric wiring (not shown) usually pass through the pipe 8.

Next, the operation of FIG. 1 will be described by taking a heating operation as an example. First, when the indoor blower 5 rotates, the indoor air sucked from the indoor suction louver 2 is warmed while passing through the indoor heat exchanger 4, becomes warm air, and is discharged from the indoor blower louver 3 into the room. Outdoor blower 1 in outdoor unit 11
When 5 rotates, the outdoor air sucked from the outdoor suction louver 12 is deprived of heat while passing through the outdoor unit heat exchanger 14, and is discharged from the outdoor exhaust louver 13 to the outside.

Since the humidifying unit 16 operates as described above, the outdoor air sucked from the outdoor air inlet 17 enters the humidifying unit 16 through the processing air passage 50, and the moisture is adsorbed by the moisture absorbing material to form the dry air. As a result, the air is discharged from the processing air discharge port 18 through the processing discharge air passage 51. At the same time, the indoor air sucked from the indoor air inlet 6 enters the humidifying unit 16 in the outdoor unit through the desorption / regeneration air passage 9 and is heated by the regeneration heater 23 to desorb moisture from the moisture absorbent to become humid air. The exhaust gas is discharged from the regeneration air discharge port 7 through the regeneration discharge air passage 10.

Then, the humid air is mixed with the air of the indoor blower 5 and discharged from the indoor louver 3 into the room. Thus, the room is humidified. The dry air discharged from the processing air discharge port is discharged to the vicinity of the suction side on the windward side of the outdoor unit heat exchanger 14 and hits the heat exchanger.

Next, during the heating operation, the outdoor unit heat exchanger 14
In this case, the refrigerant is in the evaporating process, and takes sensible heat and latent heat from the passing air. However, when the outside air temperature drops to near 0 ° C., the passing air from which heat has been taken becomes lower than the dew point temperature, and moisture in the passing air is frosted on the outdoor unit heat exchanger 14.

Once the heat exchanger has frost, the amount of passing air is reduced, so that the cooling of the passing air is further promoted and the frost is expanded. Since the passing air volume decreases, the heating capacity also decreases. However, frost formation can be suppressed by applying dry air from the humidifying unit to the suction side of the outdoor unit heat exchanger.

For example, when the outside air temperature is a dry bulb temperature of 2 ° C. and a wet bulb temperature of 1 ° C., the absolute humidity is 3.5 g / kg and the dew point temperature is about −0.5 ° C. However, the dry air at the humidification unit outlet has an absolute humidity of about 0.3 g / kg and a dew point temperature of about -2.
Dry air at 0 ° C. In the case of a 2.5 kW class air conditioner, the air volume passing through the outdoor unit heat exchanger is usually about 20 m ³ /
If the processing air volume of the humidifying unit 16 is 2 m ³ / min, the moisture of the air passing through the outdoor unit heat exchanger can be reduced by about 10%, and the frost formation is improved by about 10%.

FIG. 4 is a main part configuration diagram showing a second embodiment (according to claim 2) of an air conditioner with a humidifying function according to the present invention. In FIG. 4, the humidifying unit 16 is provided inside the indoor unit 1, and the weather cover 52 is located outside the wall 19 with the pipe 8, and the outdoor air is supplied from the downward outdoor air intake 53. The air is taken in from the outdoor air inlet 17 of the processing air passage 50. The pipe 8 connected to the outdoor unit 11 has a processing discharge air passage 51, a copper pipe for transporting refrigerant, and electric wiring.

Therefore, the dry air that has flowed out of the humidifying unit 16 inside the indoor unit is discharged from the processing air discharge port 18 inside the outdoor unit to the vicinity of the air suction side of the outdoor unit heat exchanger 14 on the windward side. That is, the operation is the same as that of FIG. 1 described above, and the same effect is obtained.

An advantage of this case is that the humidifying unit is located on the indoor unit side, so that the humid air in the desorption / regeneration air passage 9 can be discharged into the room without being cooled by the outside air. Insulating material for the desorption / regeneration air passage, which would be necessary for preventing dew condensation, is not required in this case. Further, since the processing air passage 50 terminates at the weather cover 52, the pipe 8 can be thinner than in the case of FIG.

FIG. 5 is a main part configuration diagram showing a third embodiment (according to claim 3) of an air conditioner with a humidifying function according to the present invention. In FIG. 5, the humidifying unit 16 is disposed in the middle of the piping path connecting the indoor unit 1 and the outdoor unit 11, that is, inside the weather cover 52 where the piping pipe 8 has come out of the wall 19. The outdoor air is taken in from the outside air inlet 53 through the outdoor air inlet 17 of the processing air passage 50. And, as in the case of FIG. 4, the processing discharge air passage 51, the copper pipe for transporting the refrigerant, and the electric wiring pass through the pipe 8 connected to the outdoor unit 11.

Therefore, the dry air that has flowed out of the humidifying unit 16 inside the indoor unit is discharged from the processing air outlet 18 inside the outdoor unit to the vicinity of the air suction side of the outdoor unit heat exchanger 14 on the windward side. That is, the operation is the same as that of FIG. 1 described above, and the same effect is obtained.

Particularly, in this case, since the humidifying unit is located just outside the indoor unit, the humid air in the desorption / regeneration air passage 9 can be discharged into the room without being cooled by outside air. In this embodiment, a heat insulating material for the desorption / regeneration air passage, which may be necessary for preventing dew condensation, is unnecessary in this case. Further, since the processing air passage 50 terminates at the weather cover 52, the pipe 8 can be thinner than in the case of FIG.

FIG. 6 is a main part configuration diagram showing a fourth embodiment (according to claim 4) of an air conditioner with a humidifying function according to the present invention. 6, the humidification unit 16 is located inside the outdoor unit 11 as in the embodiment of FIG. 1, and the difference is that the dry air from the humidification unit sucks air from the processing air outlet 18 to the windward of the outdoor unit heat exchanger 14. Side, especially near the bottom. That is, the operation is the same as that of FIG.

By the way, dry air is lighter than air containing moisture, and the effect of evaporating the refrigerant in the heat exchanger, that is, the effect of removing heat from the passing air, is due to the inlet side of the refrigerant with respect to the heat exchanger during the heating operation. Is stronger at the bottom than at the top.
Therefore, when the dry air is applied to the vicinity of the lower portion on the suction side of the heat exchanger 14 in this manner, the frost formation effect can be obtained more effectively than in the case of FIG.

FIG. 7 is a main part configuration diagram showing a fifth embodiment (according to claim 4) of an air conditioner with a humidifying function according to the present invention. 7, the humidification unit 16 is located inside the indoor unit 1 as in the embodiment of FIG. 4, and the difference is that the dry air from the humidification unit is supplied from the processing air discharge port 18 to the outdoor unit heat exchanger 1.
4 is discharged to the air suction side on the windward side, particularly near the lower part.

That is, the operation is the same as that of FIG.
As in the case of FIG. 6, the effect of suppressing frost formation can be obtained effectively. Further, since the processing air passage 50 terminates at the weather cover 52, the pipe 8 can be thinner than in the case of FIG.

FIG. 8 is a main part configuration diagram showing a sixth embodiment (according to claim 4) of an air conditioner with a humidifying function of the present invention. 8, the humidification unit 16 is located in the middle of the piping path, that is, inside the weather cover 52 as in the embodiment of FIG. 5, and the difference is that the dry air from the humidification unit is supplied from the processing air discharge port 18 to the outdoor unit heat exchanger 14. That is, the air is discharged to the wind suction side, particularly in the vicinity of the lower part.

That is, the operation is the same as that of FIG.
As in the case of FIG. 6, the effect of suppressing frost formation can be obtained effectively. Further, since the processing air passage 50 terminates at the weather cover 52, the pipe 8 can be thinner than in the case of FIG.

FIG. 9 is a main part configuration diagram showing a seventh embodiment (according to claim 5) of an air conditioner with a humidifying function of the present invention. 9, the humidification unit 16 is located inside the outdoor unit 11 as in the embodiment of FIG. The difference is that the dry air from the humidifying unit has a passage switching valve 54 at the end of the processing exhaust air passage 51, and the outside air temperature sensor 59 and the humidity sensor 6
The control microcomputer (not shown) calculates the dew point temperature of the air from the outside air temperature and humidity detected at 0, and the surface air temperature of the outdoor unit heat exchanger 14 is calculated based on the cycle state of the heating operation at that time. If it is determined that the temperature will be lower than the dew point,
By switching the passage switching valve, dry air is discharged to the air suction side, particularly in the vicinity of the lower part of the windward side of the outdoor unit heat exchanger 14, to suppress the reduction of frost formation.

If it is determined that the temperature does not become lower than the dew point temperature, the passage switching valve is switched in the opposite direction to discharge the air to a location other than the air intake path of the outdoor unit heat exchanger, in the figure, immediately before the outdoor exhaust louver 13. Is to be done. If the temperature does not become lower than the dew point temperature, there is no fear of frost formation. In that case, it is better to pass air containing moisture through the outdoor unit heat exchanger 14 so that heat can be efficiently obtained by the amount of latent heat, so that heating efficiency is good.

Therefore, in the case of this embodiment, the supply of dry air can be switched while judging the possibility of frost formation from the dew point temperature using the outside air temperature sensor and the humidity sensor, and the effect of suppressing the frost formation phenomenon and the heating efficiency can be reduced. It also has the effect of keeping it high.

FIG. 10 is a main part configuration diagram showing an eighth embodiment (according to claim 5) of the air conditioner with a humidifying function of the present invention. 10, the humidification unit 16 is located inside the indoor unit 1 as in the embodiment of FIG. The difference is that the dry air from the humidifying unit is provided with a passage switching valve 54 at the end of the processing exhaust air passage 51 and a control microcomputer (not shown) based on the outside air temperature and humidity detected by the outside air temperature sensor 59 and the humidity sensor 60. Calculates the dew point temperature of the air, and in the light of the cycle state of the heating operation at that time, if it is determined that the surface air temperature of the outdoor unit heat exchanger 14 becomes equal to or lower than the dew point temperature, the passage switching valve is switched, and the outdoor Machine heat exchanger 14
Dry air is discharged to the air suction side, especially in the vicinity of the lower part of the windward side, to suppress the reduction of frost formation.

If it is determined that the temperature does not become lower than the dew point, the passage switching valve is switched in the opposite direction to discharge the air to a location other than the air suction path of the outdoor unit heat exchanger, in the figure, immediately before the outdoor exhaust louver 13. Is to be done. FIG.
The same effect can be obtained. Further, since the processing air passage 50 terminates at the weather cover 52, the pipe 8 can be thinner than in the case of FIG.

FIG. 11 is a main part configuration diagram showing a ninth embodiment (according to claim 5) of an air conditioner with a humidifying function according to the present invention. In FIG. 11, the humidifying unit 16 is located in the middle of the piping path, that is, inside the weather cover 52 as in the embodiment of FIG. The difference is that the dry air from the humidification unit has a passage switching valve 54 at the end of the treatment discharge air passage 51,
A control microcomputer (not shown) calculates the dew point temperature of the air from the outside air temperature and humidity detected by the outside air temperature sensor 59 and the humidity sensor 60, and illuminates the cycle state of the heating operation at that time. If it is determined that the surface air temperature of the air conditioner 14 becomes equal to or lower than the dew point temperature, the passage switching valve is switched to discharge dry air to the air intake side, particularly the lower part, on the windward side of the outdoor unit heat exchanger 14, thereby forming frost. Suppress decrease.

If it is determined that the temperature does not become lower than the dew point temperature, the passage switching valve is switched in the opposite direction to discharge the air to a location other than the air suction path of the outdoor unit heat exchanger, in the figure, immediately before the outdoor exhaust louver 13 in the figure. Is to be done. FIG.
The same effect can be obtained. Further, since the processing air passage 50 terminates at the weather cover 52, the pipe 8 can be thinner than in the case of FIG.

FIG. 12 is a main part configuration diagram showing a tenth embodiment (according to claim 6) of an air conditioner with a humidifying function according to the present invention. As in FIG. 9, a humidification unit is provided inside the outdoor unit 11, and the outside air temperature sensor 59 and the humidity sensor 60 also perform dew point temperature detection. The difference is that the heat of the compressor 61 and the vicinity thereof is surrounded by a case 62, and the inside thereof is passed through a desorption / regeneration air passage 9 and a heat transfer means 64 such as a metal fin for receiving internal heat is added to the portion. Preheat desorption air for regeneration.

By doing so, for example, if air at 20 ° C. conveyed from the room is preheated to 30 ° C.,
The heating energy in the regeneration heater 23 is saved by 0 deg. Therefore, in the case of this embodiment, in addition to the same effects as those of the embodiment of FIG. 9, a further omitted energy effect can be obtained.

[0054]

Since the air conditioner with a humidifying function of the present invention has the above-described structure, the invention according to the first aspect of the present invention prevents the frost formation of the outdoor unit heat exchanger when the outdoor air is at a low temperature. Can be suppressed. According to the second and third aspects of the present invention, in addition to the effects of the first aspect of the present invention, a heat insulating material for the piping path is unnecessary and the piping pipe is thinner than the first aspect of the present invention. I can do it.

Further, in the invention according to the fourth aspect, the frost formation phenomenon can be suppressed when the outdoor air is at a low temperature, even better than the invention according to the first or second aspect.
Furthermore, in the invention described in claim 5, the possibility of frost formation is determined from the temperature and humidity conditions of the outdoor air and the state of the cycle operation at that time, and both effects of frost formation suppression and heating efficiency maintenance are provided. I have. In addition, the invention according to claim 6 has an effect that power consumption of the heater for regeneration heating can be suppressed.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram showing a first embodiment of an air conditioner with a humidifying function of the present invention.

FIG. 2 is a main part configuration diagram showing one embodiment of a humidification unit of FIG. 1;

FIG. 3 is a main part configuration diagram showing another embodiment of the humidification unit of FIG. 1;

FIG. 4 is a main part configuration diagram showing a second embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 5 is a main part configuration diagram showing a third embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 6 is a main part configuration diagram showing a fourth embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 7 is a main part configuration diagram showing a fifth embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 8 is a main part configuration diagram showing a sixth embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 9 is a main part configuration diagram showing a seventh embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 10 is a main part configuration diagram showing an eighth embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 11 is a main part configuration diagram showing a ninth embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 12 is a main part configuration diagram showing a tenth embodiment of the air conditioner with a humidifying function of the present invention.

FIG. 13 is a main part configuration diagram of a conventional air conditioner with a humidifying function.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit 5 Indoor blower 6 Indoor intake port 7 Regeneration air discharge port 8 Piping pipe 9 Desorption / regeneration air path 10 Regeneration discharge air path 11 Outdoor unit 14 Outdoor unit heat exchanger 15 Outdoor blower 16 Humidifier unit 17 Outdoor intake port 18 Processing Air outlet 20 Intake switching valve 21 Intake passage 22 Blower fan A 23 Regeneration heater 24 Hygroscopic material 25 Exhaust passage 26 Intake switching valve 30 Drive motor 31 Reproduction-side fan 32 Processing-side fan 35 Partition plate 50 Processing-air passage 51 Processing Exhaust air passage 52 Weather cover

Claims (6)

(57) [Claims] 1. A humidifying unit for adsorbing moisture in the air with a hygroscopic material is provided inside an outdoor unit of an air conditioner, and the outlet dry air after the adsorbing treatment is provided in the vicinity of an air suction side on the windward side of a heat exchanger. An air conditioner with a humidifying function, characterized in that a processing air outlet is provided so as to come to the center. 2. A humidifying unit for adsorbing moisture in the air by means of a hygroscopic material is provided inside the indoor unit of the air conditioner, and the outlet dry air after the adsorbing treatment is taken in at the windward side of the outdoor unit heat exchanger. An air conditioner with a humidifying function, characterized in that a processing air outlet is provided near the side. 3. A humidifying unit for adsorbing moisture in the air by means of a hygroscopic material is provided in the middle of the piping path of the air conditioner, and the outlet dry air after the adsorbing treatment is supplied to the air suction on the windward side of the outdoor unit heat exchanger. An air conditioner with a humidifying function, characterized in that a processing air outlet is provided near the side. 4. A humidifying unit for adsorbing moisture in the air with a hygroscopic material is provided inside the outdoor unit of the air conditioner, in the middle of a piping route or inside the outdoor unit, and the dry air at the outlet of the humidifying unit is supplied to the heat exchanger of the outdoor unit. An air conditioner with a humidifying function, characterized in that a processing air outlet is provided on the air suction side on the windward side and near the lower part of the heat exchanger. 5. A humidifying unit for adsorbing moisture in the air with a hygroscopic material is provided in the outdoor unit of the air conditioner, in the middle of a piping route or in the outdoor unit, and discharge of dry air at the outlet of the humidifying unit is performed by heat of the outdoor unit. A processing air discharge switching means for switching between the air suction side on the windward side of the exchanger and the vicinity of the lower part of the heat exchanger and a path other than the suction path of the heat exchanger is provided, and the temperature and humidity conditions of the outside air and the cycle operation state at that time are provided. An air conditioner with a humidifying function, wherein the processing air discharge switching means is switched in response to the change. 6. A humidifying unit for adsorbing moisture in the air with a hygroscopic material is provided inside the outdoor unit of the air conditioner, and the compressor of the outdoor unit and heat in the vicinity thereof are transmitted to the desorption / regeneration air passage. An air conditioner with a humidifying function, comprising a heat transfer section for performing the heat transfer.