JP2009063253A - Ventilation air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resolve a problem in producing dry air by carrying out reheating dehumidification during drying operation in a bathroom wherein a temperature in the bathroom is raised following continuation of the drying operation, relative humidity of blown out air is raised since an operating point of a refrigerating cycle is changed, and a drying time becomes long. <P>SOLUTION: When carrying out reheating dehumidification during drying operation, a temperature sensor 31 is provided in a first air duct 20 near a suction opening 105 to detect a temperature of the air in the bathroom 3, and when the temperature of the air in the bathroom rises, air with a constant temperature and constant humidity is introduced into the bathroom 3 from an indoor space other than the bathroom 3 by exhausting the air in the bathroom 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a ventilation air conditioner that performs ventilation air conditioning in a bathroom or the like using a heat pump.

  As a conventional ventilation air conditioner such as a bathroom using a heat pump, one heat exchanger of the heat pump absorbs heat from air taken from outside the bathroom and cools the air to condense moisture in the air. After reducing the absolute humidity, the other heat exchanger of the heat pump dissipates heat to raise the temperature of the air whose absolute humidity has been reduced, thereby reducing the relative humidity and supplying it into the bathroom. It is known to dry bathrooms and laundry such as clothes suspended in the bathrooms (see, for example, Patent Document 1).

  There is also known a device in which a device for performing such reheat dehumidification has a ventilation function for exhausting air in a bathroom to the outdoors (see, for example, Patent Document 2).

  As described above, various types of ventilation air conditioners such as bathrooms using heat pumps have been proposed. The bathroom air conditioners exemplified in Cited Documents 1 and 2 both perform reheat dehumidification operation when drying clothes and the like suspended in the bathroom and bathroom, and use dry air with low relative humidity. The object to be dried is dried by spraying on clothes. The operation of the refrigeration cycle using the heat pump at this time will be described with reference to the Mollier diagram shown in FIG. 6A. The refrigerant in the refrigeration cycle is shown by the compressor 101 in the compression step in FIG. So that enthalpy and pressure rise. At this time, the temperature of the refrigerant also rises and becomes a high temperature state. The high-temperature and high-pressure refrigerant is sent to the condenser 102, and isobaric heat is dissipated as shown in the condensation process in FIG. At this time, the temperature of the air is raised by dissipating heat to the air. The refrigerant in this state is in a two-phase state of gas-liquid mixing and is sent to an expansion valve 103 as an expansion mechanism in the refrigeration cycle. As shown in the expansion process of FIG. 6A, the refrigerant is adiabatically expanded in the expansion valve 103 to be in a low temperature state. The low-temperature and low-pressure refrigerant is sent to the evaporator 104, performs isobaric heat absorption as shown in the evaporation process in FIG. 6A, and is returned to the compressor 101 in a state where the temperature has risen. In this evaporation process, the refrigerant that has flowed into the evaporator in a two-phase state evaporates in the process of absorbing heat and is returned to the compressor 101 in a gaseous state. In the region A in FIG. 6A, since the refrigerant is in a two-phase (gas-liquid mixture) state, the amount of heat obtained by heat absorption is used to evaporate the refrigerant, so the temperature of the refrigerant hardly changes. In the region indicated by B in 6 (a), the refrigerant is completely in a gaseous state, and the temperature rises by absorbing heat. For this reason, the larger the region B in FIG. 6 (a), the higher the temperature on the downstream side of the evaporator 104. If the temperature rises to a state exceeding the dew point temperature of the air, moisture in the air may be condensed. It becomes impossible and dehumidification amount will fall. For this reason, when the main purpose is dehumidification, it is desirable to set the operation state of the refrigeration cycle so that the region B in FIG. 6A is as low as possible and the temperature hardly increases.

On the other hand, the change of the air side state will be described with reference to FIG. Air in the bathroom (for example, 20 ° C. RH 60%) sucked from the suction port 105 of the main body flows into the evaporator 104. As shown in the dew condensation region of FIG. 7, the air cooled by releasing heat to the evaporator 104 when passing through the evaporator 104 is below the dew point temperature (for example, about 10 ° C. of 12.01 ° C. or less). When the temperature is lowered to the temperature and the moisture in the air is condensed on the surface of the evaporator 104, the absolute humidity is lowered and the relative humidity is high (for example, about RH 100%). Thereafter, the air flows into the condenser 102 as shown in the temperature rising region in FIG. 7 and is heated by absorbing heat from the condenser 102 (for example, about 50 ° C.), and the relative humidity is lowered (for example, 9. 93%). The air whose relative humidity is lowered is circulated and supplied from the air outlet 107 into the bathroom by the circulation fan 106. Drying operation is carried out by blowing dry air blown from the air outlet 107 onto clothes or the like to be dried.
Japanese Utility Model Publication No.59-022693 Japanese Patent Laid-Open No. 62-141431

  As described above, in reheat dehumidification operation, the air in the bathroom is cooled to the dew point temperature or lower, the moisture in the air is condensed to lower the absolute humidity, and then the temperature is raised to lower the relative humidity. Generated and used for drying. However, in reheat dehumidification operation, the air in the bathroom is only circulated and there is no heat outflow from the bathroom, so there is input to the compressor in the refrigeration cycle, so the temperature in the bathroom gradually increases. It rises. As the temperature in the bathroom rises, the balance of heat exchange in the condenser and compressor changes, and the operating state of the refrigeration cycle changes. As shown in FIG. 6B, generally, when the temperature of air rises, the operating point of the refrigeration cycle changes from I to II in FIG. 6B. At this time, the area B in the evaporation process is expanded, the temperature on the downstream side of the evaporator rises, and moisture cannot be sufficiently condensed. For this reason, the relative humidity of the air which blows out from an apparatus also becomes high, and the subject that drying time of clothes etc. which are drying objects as a result became long occurred.

  Also, as shown in FIG. 7, when the absolute humidity of the air in the bathroom is relatively high with respect to the air of normal temperature and humidity, the temperature of the air is sufficiently lowered even when the equivalent heat exchange is performed in the evaporator. The problem is that sufficient dry air cannot be obtained even if the air in the bathroom is dehumidified by carrying out the reheat dehumidifying operation, and it takes time to dry clothes, etc., which are objects to be dried. was there.

  In addition, when the air in the bathroom is sufficiently dry, the refrigeration cycle is operated and the humidity of the air that can be supplied does not change even if reheat dehumidification is performed. There was a problem that it would increase.

  The present invention solves the above-mentioned conventional problems, prevents a decrease in the amount of dehumidification accompanying a rise in the temperature in the bathroom that occurs when a reheat dehumidification operation is performed during the drying operation, and shortens the drying time of the object to be dried. It aims at providing the ventilation air conditioner which can do.

  It is another object of the present invention to provide a ventilation air conditioner that can reduce running costs during drying operation and more efficiently dry clothes and the like.

  In order to achieve the above object, the first solution provided by the present invention is a circulation fan that sucks air from a suction port that opens into the first indoor space and blows out air from the outlet that opens into the first indoor space. And a ventilation fan that ventilates by sucking air from an exhaust port opened to a second indoor space other than the first indoor space and discharging it to the outside, a compressor that compresses refrigerant, and the circulation fan A first heat exchanger that exchanges heat between the air and the refrigerant, an expansion mechanism that expands the refrigerant, and a refrigerant circuit that circulates the refrigerant in the order of the second heat exchanger that exchanges heat between the air blown by the ventilation fan and the refrigerant are provided. In the ventilation air conditioner, a refrigeration cycle configured by the compressor, the first heat exchanger, the expansion mechanism, the second heat exchanger, and the refrigerant circuit is integrally provided in a main body exterior, Introducing air sucked from the inlet into the second heat exchanger and providing a reheat air passage for passing the air after passing through the second heat exchanger to the first heat exchanger, and drying operation of the ventilation air conditioner The reheat dehumidification operation is sometimes performed to supply dry air to the first indoor space, and the temperature in the first indoor space is set to a predetermined temperature range.

  By this means, after the air in the first indoor space is cooled to the dew point temperature or lower by the second heat exchanger and the absolute humidity is lowered, the temperature is raised when passing through the first heat exchanger, and the relative humidity Since the air is blown to the clothes to be dried that are suspended in the first indoor space in a state where the airflow is lowered, air having a lower relative humidity can be blown to the clothes, and the first time during the reheat dehumidifying operation in the drying operation. Since the indoor space is only circulating air, the temperature in the first indoor space rises, but at this time, the operating point of the refrigeration cycle also changes, so the cooling temperature of the second heat exchanger also rises. As a result, the amount of dehumidification is reduced and the clothes drying time is prolonged, but the operating point of the refrigeration cycle should not be changed by keeping the temperature of the first indoor space within a predetermined temperature range. Divided by Preventing a reduction in the amount, for it is possible to always blow air blown constant value or less relative humidity to the clothes, it is possible to dry the clothes quickly.

  The second solution provided by the present invention is to ventilate the air in the first indoor space to the outside by a ventilation fan during the drying operation.

  By this means, the temperature in the first indoor space rises during the reheat dehumidifying operation in the drying operation because only the circulating air is supplied in the first indoor space. At this time, the operating point of the refrigeration cycle also changes. Therefore, the cooling temperature of the second heat exchanger also rises, and as a result, the amount of dehumidification decreases, and the clothes drying time becomes longer. However, when the temperature of the first indoor space rises, the ventilation fan In this way, the operating point of the refrigeration cycle is not changed and the dehumidification amount is prevented from being lowered by exhausting the air in the first indoor space so that the temperature in the first indoor space falls within a predetermined temperature range. In this case, since it is possible to blow the blown air having a relative humidity below a certain value on the clothing, the clothing can be dried quickly.

  The third solution provided by the present invention is to start the ventilation of the first indoor space based on the state of the air in the first indoor space sucked from the suction port during the drying operation.

  By this means, ventilation is started according to the necessity of ventilation by starting ventilation based on the air condition in the first indoor space during the drying operation, so that wasteful heat in the case where ventilation is not necessary is used. It is possible to prevent exhaust, shorten clothing drying time, and reduce running costs.

  The fourth solution provided by the present invention is to start ventilation of the first indoor space when the temperature of the air in the first indoor space sucked from the suction port during the drying operation exceeds the first predetermined temperature. It is what you do.

  By this means, the temperature in the first indoor space exceeds the first predetermined temperature by starting ventilation when the temperature of the air in the first indoor space exceeds the first predetermined temperature during the drying operation. In this case, the temperature can be reduced by ventilation, the operating point of the refrigeration cycle can always be operated within a certain range, and the dry air with a predetermined relative humidity or less is prevented by preventing the dehumidification amount from decreasing. Can be sprayed on the clothes to be dried, and the drying time of the clothes can be shortened.

  Further, the fifth solution provided by the present invention is that the temperature of the air in the first indoor space sucked from the suction port during the drying operation is further higher than the second predetermined temperature higher than the first predetermined temperature. The reheat dehumidification operation is stopped when the temperature is high, and only the circulation air blow to the first indoor space by the circulation fan and the exhaust of the first indoor space by the ventilation fan are performed.

  By this means, the temperature of the air in the first indoor space becomes higher than the first predetermined temperature during the drying operation, and the temperature is higher than the second predetermined temperature, which is higher than the first predetermined temperature, even though ventilation is started. In this case, since the relative humidity of the air in the first indoor space is sufficiently dry, the reheat dehumidification operation is stopped and only the circulating air is supplied by the circulation fan to supply to the compressor. Thus, it is possible to quickly dry clothes to be dried while reducing running power and running cost.

  Further, the sixth solution provided by the present invention is to restart the reheat dehumidification operation when the temperature of the air in the first indoor space is lower than the second predetermined temperature by stopping the reheat dehumidification operation. It is what I did.

  By this means, the temperature in the first indoor space becomes high, and the temperature in the first indoor space is lowered by performing the operation of reducing the temperature in the first indoor space by stopping the reheat dehumidification operation. In this case, the reheat dehumidification operation can be automatically restarted, and the clothes to be dried can be dried earlier.

  The seventh solution provided by the present invention is to vary the air volume of ventilation according to the temperature of the air in the first indoor space sucked from the suction port during the drying operation.

  By this means, it is possible to dry clothes to be dried at an early stage while minimizing heat loss due to unnecessary large amount of ventilation in ventilation during drying operation and reducing running cost. Become.

  In addition, an eighth solution provided by the present invention is such that the ventilation air volume is increased as the temperature of the air in the first indoor space sucked from the suction port during the drying operation becomes higher.

  By this means, when the temperature in the first indoor space is higher in the ventilation during the drying operation, the temperature in the first indoor space is adjusted to a desired temperature at an early stage by performing more ventilation. As a result, the dehumidification amount can be prevented from decreasing and the relative humidity of the dry air supplied to the clothes to be dried can be maintained at a lower level. Can be dried.

  The ninth solution provided by the present invention is to stop ventilation when the temperature of the air in the first indoor space sucked from the suction port during the drying operation is lower than the third predetermined temperature. It is a thing.

  By this means, when the temperature in the first indoor space becomes low temperature, the increase in drying time due to the heat flowing out from the first indoor space by ventilation is prevented, and the running by improving the heat utilization efficiency Cost reduction can also be obtained.

  Further, the tenth solution provided by the present invention is that the temperature of the air in the first indoor space sucked from the suction port during the drying operation is further higher than the fourth predetermined temperature which is higher than the third predetermined temperature. When the temperature is high, the reheat dehumidification operation is stopped, and only the circulation ventilation to the first indoor space by the circulation fan and the exhaust by the ventilation fan are performed.

  By this means, the temperature of the air in the first indoor space becomes higher than the third predetermined temperature during the drying operation, and the temperature is higher than the fourth predetermined temperature, which is higher than the fourth predetermined temperature, although ventilation is started. In this case, since the relative humidity of the air in the first indoor space is sufficiently dry, the reheat dehumidification operation is stopped and only the circulating air is supplied by the circulation fan to supply to the compressor. Thus, it is possible to quickly dry clothes to be dried while reducing running power and running cost.

  The eleventh solution taken by the present invention is to restart the reheat dehumidification operation when the temperature of the air in the first indoor space is lower than the fourth predetermined temperature by stopping the reheat dehumidification operation. It is what I did.

  By this means, the temperature in the first indoor space becomes high, and the temperature in the first indoor space is lowered by performing the operation of reducing the temperature in the first indoor space by stopping the reheat dehumidification operation. In this case, the reheat dehumidification operation can be automatically restarted, and the clothes to be dried can be dried earlier.

  The twelfth solution provided by the present invention is such that the humidity of the air in the first indoor space sucked from the suction port during the drying operation falls within a predetermined humidity range.

  By this means, the relative humidity of the air in the first indoor space can be brought into a state most suitable for clothes drying, and the clothes drying time can be shortened.

  The thirteenth solution taken by the present invention is to start ventilation when the humidity of the air in the first indoor space sucked from the suction port during the drying operation becomes higher than the first predetermined humidity. It is a thing.

  By this means, the humidity in the first indoor space exceeds the first predetermined humidity by starting ventilation when the humidity of the air in the first indoor space exceeds the first predetermined humidity during the drying operation. In this case, the relative humidity in the first indoor space is reduced by introducing relatively low humidity air from a relatively indoor space other than the first indoor space into the first indoor space by performing ventilation in such a case. By performing the reheat dehumidification, the relative humidity of the air blown onto the clothing to be dried can be further reduced, and the clothing to be dried can be dried earlier.

  In addition, the fourteenth solution taken by the present invention is that the humidity of the air in the first indoor space sucked from the suction port during the drying operation is further higher than the second predetermined humidity which is lower than the first predetermined temperature. In the case of low humidity, the reheat dehumidification operation is stopped, and only the circulation ventilation to the first indoor space by the circulation fan is performed.

  By this means, when the humidity of the air in the first indoor space becomes lower than the second predetermined humidity that is lower than the first predetermined temperature during the drying operation, the relative air in the first indoor space Since the humidity is in a sufficiently dry state, the reheat dehumidification operation is stopped, and only the circulation air blow by the circulation fan is performed, so that the power supplied to the compressor is reduced and the drying is performed while reducing the running cost. It becomes possible to dry the clothing which is the object at an early stage.

  The fifteenth solution taken by the present invention is to vary the air volume of ventilation according to the humidity of the air in the first indoor space sucked from the suction port during the drying operation.

  By this means, it is possible to dry clothes to be dried at an early stage while minimizing heat loss due to unnecessary large amount of ventilation in ventilation during drying operation and reducing running cost. Become.

  According to a sixteenth solution taken by the present invention, the ventilation air volume is increased as the humidity of the air in the first indoor space sucked from the suction port during the drying operation increases.

  By this means, in the ventilation during the drying operation, when the humidity in the first indoor space is higher, the ventilation in the first indoor space is quickly brought to the desired humidity by performing more ventilation. As a result, the relative humidity of the dry air supplied to the clothing to be dried can be maintained at a lower state, so that the clothing to be dried can be dried at an early stage. Become.

  In addition, the seventeenth solution taken by the present invention is that when the humidity of the air in the first indoor space sucked from the suction port during the drying operation is continuously lower than the third predetermined humidity for a certain time or longer, the drying is performed. The operation is to be terminated.

  By this means, the moisture contained in the clothing continues to evaporate into the air until the clothing to be dried is completely dried. However, when the clothing is completely dried, the moisture does not evaporate into the air. Since the humidity decreases, if the humidity of the air in the first indoor space sucked from the suction port falls below the predetermined relative humidity continuously for a certain time or more, it is determined that the clothing to be dried is completely dried. Therefore, the convenience of the user can be improved without using extra power by automatically ending the drying operation.

  According to the present invention, it is possible to prevent the drying time of clothes to be dried due to a decrease in the dehumidification amount due to an increase in temperature in the bathroom accompanying the drying operation, and to dry clothes and the like at an early stage. It becomes possible.

  In addition, since it is possible to efficiently perform the drying operation without using a wasteful amount of heat, it is possible to perform the drying operation with reduced running cost.

  The invention according to claim 1 of the present invention includes a circulation fan that sucks air from a suction port opened in the first indoor space and blows out air from a blower opening opened in the first indoor space, and other than the first indoor space A ventilation fan that ventilates by sucking air from an exhaust port opened in the second indoor space and discharging it to the outside, a compressor that compresses the refrigerant, and a first air that exchanges heat between the air blown by the circulation fan and the refrigerant. In the ventilation air conditioner provided with a refrigerant circuit in which the refrigerant circulates in the order of one heat exchanger, an expansion mechanism that expands the refrigerant, and a second heat exchanger that exchanges heat between the air blown by the ventilation fan and the refrigerant A refrigeration cycle configured by a compressor, the first heat exchanger, the expansion mechanism, the second heat exchanger, and the refrigerant circuit is provided integrally in the exterior of the main body, and air sucked from the suction port is In addition to being introduced into the heat exchanger, a reheat air passage is provided to ventilate the air that has passed through the second heat exchanger to the first heat exchanger, and the reheat dehumidifying operation is performed during the drying operation of the ventilation air conditioner. Is supplied to the first indoor space, and the temperature in the first indoor space is within a predetermined temperature range. By this means, the air in the first indoor space is dew point temperature by the second heat exchanger. After being cooled down to a state where the absolute humidity is lowered, the temperature is raised when passing through the first heat exchanger, and is a drying target suspended in the first indoor space in a state where the relative humidity is lowered. Since air is blown onto clothing, air with lower relative humidity can be blown onto clothing, and during reheat dehumidifying operation during drying operation, the first indoor space is only circulating air, so the temperature in the first indoor space is It will rise, but this At this time, since the operating point of the refrigeration cycle also changes, the cooling temperature of the second heat exchanger also rises, and as a result, the dehumidification amount decreases and the clothes drying time becomes longer. By keeping the temperature of the product within the predetermined temperature range, the operating point of the refrigeration cycle is prevented from changing, so that the amount of dehumidification can be prevented from being lowered, and blowing air with a relative humidity below a certain value can always be blown onto clothing. Therefore, the clothes can be dried at an early stage.

  In addition, ventilation is performed to exhaust the air in the first indoor space to the outside with a ventilation fan during the drying operation. By this means, only the circulating air is supplied into the first indoor space during the reheat dehumidifying operation in the drying operation. Therefore, the temperature in the first indoor space rises, but at this time, since the operating point of the refrigeration cycle also changes, the cooling temperature of the second heat exchanger also rises, resulting in a dehumidification amount. However, when the temperature of the first indoor space rises, the air in the first indoor space is exhausted by the ventilation fan to set the temperature in the first indoor space to a predetermined value. The operating point of the refrigeration cycle is not changed by setting the temperature range to, and by blowing the air with a relative humidity below a certain value at all times, it is possible to blow the clothing on the clothing by preventing the dehumidification amount from decreasing. Therefore, it is possible to dry the clothes quickly.

  In addition, ventilation of the first indoor space is started based on the state of the air in the first indoor space sucked from the suction port during the drying operation. By this means, in the first indoor space during the drying operation, By starting ventilation based on the air condition, ventilation is performed according to the necessity of ventilation, preventing unnecessary heat exhaustion when ventilation is not necessary, shortening clothes drying time and running cost Can be reduced.

  Further, when the temperature of the air in the first indoor space sucked from the suction port during the drying operation exceeds the first predetermined temperature, ventilation of the first indoor space is started. When the temperature in the first indoor space exceeds the first predetermined temperature by starting ventilation when the temperature of the air in the first indoor space exceeds the first predetermined temperature during the drying operation It is possible to reduce the temperature by ventilation, it is possible to always operate the operating point of the refrigeration cycle within a certain range, and always dry dry air below the specified relative humidity by preventing the dehumidification amount from decreasing. It becomes possible to spray the target clothing, and it is possible to shorten the clothing drying time.

  The reheat dehumidification operation is stopped when the temperature of the air in the first indoor space sucked from the suction port during the drying operation is higher than the second predetermined temperature that is higher than the first predetermined temperature. The circulation fan only circulates air to the first indoor space and exhausts the first indoor space by the ventilation fan. By this means, the temperature of the air in the first indoor space is reduced during the drying operation. When the temperature is higher than the first predetermined temperature and the ventilation is started even though the ventilation is started, the relative humidity of the air in the first indoor space is sufficiently high. Because it is in a dry state, the reheat dehumidification operation is stopped and only the circulation air blow by the circulation fan is performed, thereby reducing the power supplied to the compressor and reducing the running cost while drying the clothing. Dry early Theft is possible.

  Further, by stopping the reheat dehumidification operation, the reheat dehumidification operation is restarted when the temperature of the air in the first indoor space is lower than the second predetermined temperature. When the temperature in the first indoor space decreases and the temperature in the first indoor space decreases by performing an operation to lower the temperature in the first indoor space by stopping the reheat dehumidification operation. The heat dehumidifying operation can be automatically restarted, and the clothes to be dried can be dried earlier.

  In addition, the air volume of ventilation is varied according to the temperature of the air in the first indoor space sucked from the suction port during the drying operation. By this means, an unnecessarily large amount of ventilation is performed in the ventilation during the drying operation. It is possible to minimize the heat loss associated with carrying out and to dry the clothing to be dried at an early stage while reducing the running cost.

  Further, the ventilation air volume is increased as the temperature of the air in the first indoor space sucked from the suction port at the time of the drying operation becomes higher. By this means, in the ventilation at the time of the drying operation, the first indoor space is increased. When the inside temperature is higher, it is possible to adjust the temperature in the first indoor space to a desired temperature at an early stage by performing more ventilation. Since the relative humidity of the dry air supplied to can be maintained at a lower state, the clothes to be dried can be dried at an early stage.

  Further, the ventilation is stopped when the temperature of the air in the first indoor space sucked from the suction port during the drying operation is lower than the third predetermined temperature. When the temperature in the indoor space becomes low, the drying time is prevented from increasing due to the heat flowing out from the first indoor space due to ventilation, and the running cost can be reduced by improving the heat utilization efficiency. Can do.

  Further, the reheat dehumidification operation is stopped when the temperature of the air in the first indoor space sucked from the suction port during the drying operation is higher than the fourth predetermined temperature that is higher than the third predetermined temperature. The circulation fan only circulates air to the first indoor space and exhausts by the ventilation fan. By this means, the temperature of the air in the first indoor space during the drying operation is a third predetermined temperature. If the temperature becomes higher than the fourth predetermined temperature, which is higher than the fourth predetermined temperature, although the ventilation is started, the relative humidity of the air in the first indoor space is sufficiently dry. Therefore, the reheat dehumidification operation is stopped and only the circulation air blow by the circulation fan is performed, so that the power supplied to the compressor is reduced, and the clothing to be dried is dried early while reducing the running cost. Is possible

  Further, by stopping the reheat dehumidification operation, the reheat dehumidification operation is resumed when the temperature of the air in the first indoor space falls below the fourth predetermined temperature. Reheating when the temperature in the first indoor space is lowered by performing an operation to lower the temperature in the first indoor space by stopping the reheat dehumidifying operation when the temperature in the indoor space becomes high The dehumidifying operation can be automatically restarted, and the clothes to be dried can be dried earlier.

  Further, the humidity of the air in the first indoor space sucked from the suction port during the drying operation is in a predetermined humidity range, and this means reduces the relative humidity of the air in the first indoor space to clothes drying. It is possible to achieve the most suitable state, and it is possible to shorten the clothes drying time.

  In addition, ventilation is started when the humidity of the air in the first indoor space sucked from the suction port during the drying operation becomes higher than the first predetermined humidity. Ventilation is started when the humidity in the first indoor space exceeds the first predetermined humidity by starting ventilation when the humidity of the air in the first indoor space exceeds the first predetermined humidity. Thus, by introducing relatively low-humidity air from a relatively indoor space other than the first indoor space into the first indoor space, the relative humidity in the first indoor space is reduced and reheat dehumidification is performed. Thus, the relative humidity of the air sprayed on the clothing to be dried can be further reduced, and the clothing to be dried can be dried earlier.

  Further, when the humidity of the air in the first indoor space sucked from the suction port during the drying operation is lower than the second predetermined humidity lower than the first predetermined temperature, the reheat dehumidification operation is stopped, The circulation fan only performs circulation air flow to the first indoor space, and by this means, the second humidity in which the humidity of the air in the first indoor space is lower than the first predetermined temperature during the drying operation. When the humidity becomes lower than the predetermined humidity, the relative humidity of the air in the first indoor space is sufficiently dry, so the reheat dehumidification operation is stopped and only the circulating air is sent by the circulation fan. By doing so, it is possible to reduce the power supplied to the compressor and to dry the clothing to be dried at an early stage while reducing the running cost.

  In addition, the air volume of ventilation is varied according to the humidity of the air in the first indoor space sucked from the suction port during the drying operation. By this means, an unnecessarily large amount of air is ventilated during the drying operation. It is possible to minimize the heat loss associated with the ventilation of the clothes and to dry the clothing to be dried at an early stage while reducing the running cost.

  Further, the ventilation air volume is increased as the humidity of the air in the first indoor space sucked from the suction port during the drying operation increases. When the humidity of the room is higher, it is possible to adjust the humidity in the first indoor space to the desired humidity at an early stage by carrying out more ventilation. Since the relative humidity of the dry air supplied to can be maintained at a lower state, the clothes to be dried can be dried at an early stage.

  In addition, the drying operation is terminated when the humidity of the air in the first indoor space sucked from the suction port during the drying operation is continuously lower than the third predetermined humidity for a certain time or more. Depending on the means, the moisture contained in the clothing will continue to evaporate into the air until it is completely dried, but the moisture will not evaporate into the air when completely dried. Therefore, if the humidity of the air in the first indoor space sucked from the suction port falls below the predetermined relative humidity continuously for a certain time or more, it is determined that the clothing to be dried is completely dry Therefore, the convenience of the user can be improved without using extra power by automatically ending the drying operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a sketch of a living space in which a ventilation air conditioner according to Embodiment 1 of the present invention is installed. In FIG. 1, an indoor living space 1 is partitioned into a living room 2, a bathroom 3, a dressing room 4, or a toilet 5 as an indoor space, and a main body 6 of a ventilation air conditioner is installed behind the ceiling of the bathroom 3. Has been. The main body 6 includes a first exhaust duct 7 communicating with the main body 6 and the outdoors, a first exhaust port 8 opened in the ceiling of the dressing room 4, a second exhaust duct 9 communicating with the main body 6, and an opening in the ceiling of the toilet 5. A third exhaust duct 11 that communicates the second exhaust port 10 and the main body 6 is connected.

  In addition, a ventilation fan 12 is disposed inside the main body 6, and a first exhaust duct 7 that communicates between the outdoor body and the main body 6 is connected to a blow-out side of the ventilation fan 12, and a undressing chamber 4 and the main body 6 communicate with each other. The second exhaust duct 9 and the third exhaust duct 11 communicating the toilet 5 and the main body 6 are connected to the suction side of the ventilation fan 12. Therefore, when the ventilation fan 12 is operated, the air in the dressing room 4 and the toilet 5 is sucked into the ventilation fan 12 from the first exhaust port 8 and the second exhaust port 10 through the second exhaust duct 9 and the third exhaust duct 11. The air is exhausted outdoors through one exhaust duct 7.

  When the ventilation fan 12 is continuously operated, the inside of the indoor living space 1 becomes negative pressure, so that fresh outside air is supplied from the air supply opening 13 opened on the wall facing the outside of the living room 2 as the indoor space. The living space 1 will be ventilated. Since this ventilation operation needs to be performed continuously when the confidentiality of the building is high (24-hour ventilation), the ventilation fan 12 corresponds to a predetermined ventilation amount, for example, about half the volume of the living space 1 in one hour. Operate continuously to ensure ventilation.

  The living room 2 is provided with an air conditioner 14 for controlling the temperature of the room. The air conditioner 14 is used for cooling in the summer and heating in the winter to keep the room temperature properly. Therefore, when continuous ventilation operation is performed throughout the year as described above, in the living room, the air conditioner 14 is used for cooling in the summer, and the air conditioner 14 is used for heating in the winter. The air controlled at 0 ° C. is sucked into the first exhaust port 8 and the second exhaust port 10 through the louver and undercut portions of the door 15 of the dressing room 4 and the toilet 15 and passes through the main body 6 of the ventilation air conditioner. It will be discharged outdoors.

  2 and 3 are an air passage configuration diagram and a refrigerant circuit diagram of the ventilation air conditioner. As shown in FIG. 2, the main body 6 of the ventilation air conditioner is installed on the back of the ceiling of the bathroom 3. In addition, a suction port 105 and an air outlet 107 are opened on the ceiling surface of the bathroom 3, and a filter 16 is provided in the suction port 105 for detachably capturing dust. Further, the inside of the main body 6 is largely divided into three sections by a structural wall, and the suction port 105 and the air outlet 107 are communicated with each other, and the first section 17 located at the lower part of the main body, the suction port 105 and the ventilation fan are communicated with each other. A second compartment 18 located at the upper part of the main body and a compressor compartment 19 which is located on the side surface of the main body and accommodates the compressor 101 are provided. The suction port 105 and the first section 17 are communicated with each other by the first air passage 20, and the air in the bathroom sucked from the suction port 105 is blown out from the outlet 107 by the circulation fan 106 provided in the first section 17. Is done. A first damper 21 as an air path switching means for opening and closing communication between the suction port 105 and the circulation fan 106 is provided in the first air path 20. Switch to the optimum air path for the operation mode. In addition, the suction port 105 and the second section 18 are communicated with each other by the second air passage 22, and the air in the bathroom 3 sucked from the suction port 105 is connected to the second section 18 by the ventilation fan 12. It is connected to the suction side together with the second exhaust duct 9 and the third exhaust duct. Further, a second damper 23 is provided in the second air passage 22 as air passage switching means for opening and closing the communication between the suction port 105 and the ventilation fan 12. When ventilation is not performed, the exhaust from the bathroom 3 can be stopped while the second damper 23 is closed to exhaust the clothes from the dressing room 4 and the toilet 5 to the outside. Thus, the opening and closing of the first damper 21 and the second damper 23 can be switched. Normally, a drain pan (not shown) for collecting the condensed water generated in the second heat exchanger 109 is provided at the lowermost part of the second section 18. Since the drain pan can be installed at a position higher than the lowermost surface of the main body, it can be drained using a natural gradient when draining from the drain pan to the outside of the main body 6. This eliminates the need to provide a separate space for accommodating a drain pump or the like.

  In addition, for example, an HCFC refrigerant (including chlorine, hydrogen, fluorine, and carbon atoms in the molecule) and an HFC refrigerant (including hydrogen, carbon, and fluorine atoms in the molecule) as the refrigerant in the main body 6. A refrigerant circuit 24 filled with any of natural refrigerants such as hydrocarbons and carbon dioxide is formed, and in this refrigerant circuit 24, the compressor 101 that compresses the refrigerant, heat exchange between the supply air and the refrigerant A first heat exchanger 108 for causing the refrigerant to expand, an expansion valve 103 as an expansion mechanism for expanding the refrigerant, and a second heat exchanger 109 for exchanging heat between the supply air and the refrigerant.

  The first heat exchanger 108 is disposed in the first section 17, and the second heat exchanger 109 is disposed on the suction side of the ventilation fan 12 in the second section 18. Accordingly, in the first heat exchanger 108, the refrigerant radiates heat to the air in the bathroom 3 circulated by the circulation fan 106, and in the second heat exchanger 109, the refrigerant is radiated to the air discharged outdoors by the ventilation fan 12. Will endotherm. The second heat exchanger 109 is installed in the second section 18 on the downstream side of the junction of the suction port 105, the second exhaust duct 9, and the third exhaust duct 11, and is in the bathroom 3, the dressing room 4, and the toilet. 5 can absorb heat from the air exhausted from the inside to the outside.

  The partition wall separating the upstream side of the first heat exchanger 108 in the first section 17 and the downstream side of the second heat exchanger 109 in the second section 18 is upstream of the first heat exchanger 108 of the first section 17. The fifth air passage 29 for communicating the first air passage 20 with the second air passage 22 downstream of the second heat exchanger 109 in the second compartment 18 and the communication between the first compartment 17 and the second compartment 18 are opened and closed. The 5th damper 30 as an air path switching means for this is provided, By opening the 5th damper 30, the air path at the time of a reheat dehumidification operation can be formed. By forming the fifth damper 30 integrally with the first damper 21, the fifth damper 30 can be simultaneously opened when the first damper 21 is closed.

  Next, the operation of the ventilation air conditioner will be described. FIG. 4 is a list showing the operation state of each component in each operation pattern. Hereinafter, each operation mode will be described in detail.

  First, in the multi-room heating operation mode, the first damper 21 is opened and the second damper 23 is closed to heat the bathroom 3 while ventilating from the dressing room 4 and the toilet 5. In this case, the air in the dressing room 4 and the toilet 5 sucked from the first exhaust port 8 and the second exhaust port 10 is exchanged by the second exhaust duct 9 and the third exhaust duct 11 in the second section 18. Flows into the vessel 109. When passing through the second heat exchanger 109, heat is applied to the refrigerant flowing through the second heat exchanger 109 (heat absorption), and the first exhaust duct 7 is made to flow by the ventilation fan 12 in a state where the temperature is lowered. Exhausted to the outside. On the other hand, the air in the bathroom 3 sucked from the suction port 105 flows into the first heat exchanger 108 in the first section 17. When passing through the first heat exchanger 108, heat is given from the refrigerant circulating in the first heat exchanger 108 (heat radiation), and the temperature is raised from the outlet 107 to the inside of the bathroom 3 by the circulation fan 106. Circulated and supplied. As described above, in the multi-room heating operation mode, heat is recovered from the air in the dressing room 4 and the toilet 5 that is exhausted outdoors, and the recovered heat is input into the bathroom 3 to heat the bathroom 3. Mode.

  Next, the bathroom ventilation heating operation mode is an operation mode in which the first damper 21 is opened and the second damper 23 is opened to heat the bathroom 3 while ventilating the bathroom 3. In this case, part of the air in the bathroom 3 sucked from the suction port 105 flows into the second heat exchanger 109 in the second section 18 through the second air passage 22. At this time, the air in the dressing room 4 and the toilet 5 sucked from the first exhaust port 8 and the second exhaust port 10 also flows into the second heat exchanger 109 at the same time. When passing through the second heat exchanger 109, heat is applied to the refrigerant flowing through the second heat exchanger 109 (heat absorption), and the first exhaust duct 7 is made to flow by the ventilation fan 12 in a state where the temperature is lowered. Exhausted to the outside. At this time, the temperature of the air discharged to the outside is exhausted after being lowered to a temperature lower than the temperature of the living space 1 other than the bathroom. In contrast, the remaining air in the bathroom 3 sucked from the suction port 105 flows into the first heat exchanger 108 in the first section 17. When passing through the first heat exchanger 108, heat is given from the refrigerant circulating in the first heat exchanger 108 (heat radiation), and the temperature is raised from the outlet 107 to the inside of the bathroom 3 by the circulation fan 106. Circulated and supplied. As described above, in the bathroom ventilation / heating operation mode, heat is recovered from the air in the bathroom 3, the dressing room 4 and the toilet 5 that are exhausted outdoors, and the recovered heat is input into the bathroom 3 to heat the bathroom 3. This is the operation mode to be performed. The communication between the first exhaust port 8 and the second exhaust port 10 is opened and closed in the third air passage 25 and the fourth air passage 26 communicating with the second exhaust duct 9 and the third exhaust duct 11 and the second section 18. The third damper 27 and the fourth damper 28 are provided, and either or both of the third damper 27 and the fourth damper 28 are closed, so that only the bathroom 3 or the bathroom 3 and the dressing room 4 or the bathroom 3 and the toilet are closed. It is also possible to heat the bathroom 3 while selectively ventilating the air in the room 5. Such a bathroom ventilation heating mode is an operation mode that is also selected when drying in the bathroom 3 or drying the laundry installed in the bathroom 3, and the bathroom 3 can be more quickly combined with heating and ventilation. It is also possible to dry the inside or the laundry.

  Next, the multi-room ventilation operation mode is an operation mode in which the first damper 21 is closed and the second damper 23 is closed to ventilate the dressing room 4 and the toilet 5. In this case, in this case, the air in the dressing room 4 and the toilet 5 sucked from the first exhaust port 8 and the second exhaust port 10 is supplied to the second compartment 18 by the second exhaust duct 9 and the third exhaust duct 11. It flows into the two heat exchanger 109. In the multi-chamber ventilation operation mode, unlike the two operation modes described above, the air passes through the second heat exchanger 109 because the operation of the ventilation fan 12 is performed without the operation of the compressor 101 and the circulation fan 106. There is no transfer of heat. For this reason, the air sucked from the dressing room 4 and the toilet 5 is exhausted to the outside through the first exhaust duct 7 without changing the temperature. The communication between the first exhaust port 8 and the second exhaust port 10 is opened and closed in the third air passage 25 and the fourth air passage 26 communicating with the second exhaust duct 9 and the third exhaust duct 11 and the second section 18. The third damper 27 and the fourth damper 28 are provided, and either the third damper 27 or the fourth damper 28 is closed to selectively ventilate the air only in the dressing room 4 or only in the toilet 5. It is also possible.

  Next, the bathroom ventilation operation mode is an operation mode in which the first damper 21 is closed and the second damper 23 is opened to ventilate the bathroom 3. In this case, the air in the bathroom 3 sucked from the suction port 105 flows into the second heat exchanger 109 in the second section 18 through the second air passage 22. At this time, the air in the dressing room 4 and the toilet 5 sucked from the first exhaust port 8 and the second exhaust port 10 also flows into the second heat exchanger 109 at the same time. In the bathroom ventilation operation mode, as in the multi-room ventilation operation mode, the operation of the ventilation fan 12 is performed without the operation of the compressor 101 and the circulation fan 106, so that heat is generated when air passes through the second heat exchanger 109. Will not be exchanged. For this reason, the air sucked from the bathroom 3, the dressing room 4 and the toilet 5 is exhausted to the outside through the first exhaust duct 7 without changing the temperature. The communication between the first exhaust port 8 and the second exhaust port 10 is opened and closed in the third air passage 25 and the fourth air passage 26 communicating with the second exhaust duct 9 and the third exhaust duct 11 and the second section 18. The third damper 27 and the fourth damper 28 are provided, and either or both of the third damper 27 and the fourth damper 28 are closed, so that only the bathroom 3 or the bathroom 3 and the dressing room 4 or the bathroom 3 and the toilet are closed. It is also possible to selectively ventilate the air in 5.

  Next, in the reheat dehumidifying operation mode (corresponding to the drying operation), the first damper 21 is set so that the first air passage 20 side is closed and the third air passage 25 side is opened, and the second damper 23 is opened. This is an operation mode for dehumidifying the inside of the bathroom 3. In this case, the air in the bathroom 3 sucked from the suction port 105 flows into the second heat exchanger 109 in the second section 18 through the second air passage 22. When passing through the second heat exchanger 109, heat is given to the refrigerant circulating in the second heat exchanger 109 (heat absorption), and the temperature is lowered below the dew point temperature so that moisture in the air is condensed. Then, it flows out from the second heat exchanger 109 in a state where the absolute humidity is lowered. The air that has flowed out of the second heat exchanger 109 flows into the first heat exchanger 108 in the first section 17 through the third air passage 25. When passing through the first heat exchanger 108, heat is applied from the refrigerant flowing through the first heat exchanger 108 (heat radiation), and the temperature is raised, so that the relative humidity of the air decreases. The air whose relative humidity has been lowered is circulated and supplied from the outlet 107 into the bathroom by the circulation fan 106. As described above, in the dehumidifying operation mode, the refrigerant circuit 24 provided in the main body 6 is used to dehumidify and raise the temperature of the air in the bathroom 3 to produce dry air, which is then dried in the bathroom 3 or installed in the bathroom 3. In the operation mode selected when the laundry is dried, the dried air can be supplied into the bathroom 3 so that the bathroom 3 can be quickly dried or the laundry can be dried.

  Of the above operation modes, the reheat dehumidification operation mode will be described in detail.

  When the reheat dehumidifying operation mode is selected, the relative humidity is obtained by heating and heating after dehydrating moisture in the air by passing the air sucked from the bathroom 3 in the order from the evaporator to the condenser as described above. Is generated and is blown into the bathroom 3 to dry the bathroom 3 and clothes hung in the bathroom 3. The air in the bathroom 3 sucked from the suction port 105 flows into the second heat exchanger 109 through the second air passage 22. At this time, the temperature and humidity of the air in the bathroom 3 is measured by the temperature sensor 31 and the humidity sensor 32 provided in the air passage near the suction port 105. The air cooled by the second heat exchanger 109 is heated by the first heat exchanger 108 and is circulated and supplied from the outlet 107 to the bathroom 3 by the circulation fan 106 in a state where the relative humidity is low. The air outlet 107 is provided with a wind direction adjusting louver 33, which blows dry air in an arbitrary direction to supply the dry air directly to the object to be dried, thereby shortening the drying time.

  Looking at the heat balance between the air and the heat exchanger when passing through the second heat exchanger 109 and the first heat exchanger 108, the heat is transferred from the air to the refrigeration cycle side in the second heat exchanger 109. After the heat is input to the compressor 101 (input as electric power, etc.), the heat is again transferred from the first heat exchanger to the air side. In the refrigeration cycle, the input and the output are in the same state. Therefore, the amount of heat corresponding to the input to the compressor 101 is given to the air, and the temperature rises higher than the air sucked from the suction port 105, so It is supplied to the bathroom 3.

  For this reason, if the reheat dehumidifying operation is continued, the amount of heat corresponding to the input to the compressor 101 is supplied to the bathroom 3, and the temperature in the bathroom 3 gradually increases. As the temperature in the bathroom 3 rises, the temperature of the air flowing into the second heat exchanger 109 and the first heat exchanger 108 also changes, so the amount of heat exchange in each heat exchanger changes. When the temperature of the air rises, the amount of heat exchange in each heat exchanger increases, so the operating point of the refrigeration cycle shifts to the high temperature and high pressure side as shown in FIG. In such a state, since the refrigerant shown in region B of FIG. 5 absorbs heat in a gaseous state, the temperature of the refrigerant rises, and when the temperature rises above the dew point temperature of the air, the second heat exchanger 109 The amount of moisture condensation in the air on the surface decreases, and as a result, the dehumidification amount decreases, resulting in a longer drying time. For this reason, when the temperature of the air in the bathroom 3 detected by the temperature sensor 31 exceeds a first predetermined temperature, for example, 35 ° C., it is desirable to reduce the temperature of the air in the bathroom 3.

  On the other hand, the indoor space other than the bathroom is generally about 20 ° C. which is normal temperature by air conditioning or the like. Therefore, when the temperature of the air in the bathroom 3 detected by the temperature sensor 31 exceeds the first predetermined temperature, a part of the air in the bathroom 3 sucked from the suction port 105 by operating the ventilation fan 12. And the bathroom 3 such as the dressing room 4 from a natural air supply opening (not shown) such as a louver provided in the door 15 of the bathroom 3 by the negative pressure in the bathroom 3 accompanying the exhaust. Room temperature air can be introduced into the bathroom 3 from other indoor spaces, and as a result, the temperature in the bathroom 3 decreases. With respect to the ventilation air volume from the ventilation fan 12, the temperature of the air in the bathroom 3 is kept constant by increasing the ventilation air volume when the temperature of the air in the bathroom 3 detected by the temperature sensor 31 becomes higher. It becomes possible to control within the range (for example, 15 ° C. to 35 ° C.). However, even if the ventilation fan 12 is operated in a relatively high temperature period such as summer, and the ventilation in the bathroom 3 is performed, the temperature of the air flowing into the bathroom 3 is relatively high (about 30 ° C.). 3 The temperature of the air in the interior may be difficult to decrease. If such a state continues, the temperature of the air in the bathroom 3 further rises and may reach a second predetermined temperature (for example, 38 ° C.). When the temperature of the air in the bathroom 3 reaches the second predetermined temperature, the state of the air in the bathroom 3 is 30 ° C. 60% before starting the reheat dehumidification operation (absolute humidity 0.01611 kg / kg ′ ) If the operation is started from about, in addition to the decrease in absolute humidity due to the operation of the refrigeration cycle, the relative humidity of the bathroom air is 18.51% (absolute humidity 0.007661 kg / kg) due to the temperature increase in the bathroom 3 ') To fall.

  Since the relative humidity in the bathroom is sufficiently lowered in this way, the operation of the compressor 101 is stopped when the temperature in the bathroom 3 detected by the temperature sensor 31 exceeds the second predetermined temperature. The bathroom 3 and clothes can be sufficiently dried by circulating and blowing the air in the bathroom 3 by the circulation fan 106 and blowing the air to the object to be dried. By stopping the operation of the compressor in such a state, it is possible to perform sufficient drying while suppressing unnecessary power consumption. However, if only the circulation ventilation by the circulation fan 106 is carried out, the moisture evaporates from the dried object, and the absolute humidity of the air in the bathroom 3 gradually increases.

  For this reason, ventilation in the bathroom is performed by operating the ventilation fan 12 in addition to the circulating air flow, and the operation of exhausting the moisture evaporated from the drying target to the outside of the bathroom 3 is performed. By the exhaust by the ventilation fan, the temperature in the bathroom 3 gradually decreases, and when the temperature falls below the second predetermined temperature again, the operation of the compressor 101 is started again, and the reheat dehumidification operation is performed. The humidity in the bathroom 3 is reduced to shorten the drying time of the object to be dried.

  When the hot water is filled in the bathtub in the bathroom 3 or immediately after using the shower, the humidity in the bathroom may be high. In such a state, even if the reheat dehumidification operation is performed by the refrigeration cycle, the relative humidity of the blown air is not sufficiently lowered, and the drying time of the object to be dried may become longer. Therefore, if the humidity of the air in the bathroom 3 detected by the humidity sensor 32 is higher than the first predetermined humidity (for example, about 80%), the ventilation fan 12 is operated to bring the room temperature from the indoor space other than the bathroom 3 to room temperature. After reducing the humidity in the bathroom 3 by introducing air of normal humidity into the bathroom 3, the drying time of the drying object is shortened by supplying more dry air by performing reheat dehumidification operation. be able to. On the contrary, when the humidity is low even at room temperature, air in the bathroom 3 detected by the humidity sensor 32 can be supplied to the object to be dried without sufficiently operating the refrigeration cycle. When the humidity of the compressor is lower than the second predetermined humidity (for example, RH 15% or less), the operation of the compressor 101 is stopped, and only the circulation air blow by the circulation fan 106 is performed, thereby suppressing unnecessary power consumption. Sufficient drying can be performed.

  As described above, with the configuration and operation described above, the ventilation air conditioner according to the present embodiment performs the reheat dehumidification operation when drying in the bathroom 3 and drying objects such as clothes suspended in the bathroom 3. Thus, it is possible to efficiently dry, and at the same time, it is possible to prevent an increase in the drying time associated with the temperature rise in the bathroom 3 and to dry the object to be dried at an early stage.

  The contents described above are only described for one mode for carrying out the invention, and the present invention is not limited to the above embodiment.

  For example, in the present embodiment, the configuration and the operation including all the operations described in the claims of the present invention have been described. However, the configuration and the operation adopting a part of the configurations and operations described in the claims of the present invention are described. It may be an operation, and there is no difference in its effect. Desirably, by carrying out all the configurations and operations described in the claims of the present invention, it is possible to dry the object to be dried earlier and to reduce the running cost.

  Further, in the present embodiment, the structure in the main body has been described as a structure that is roughly divided into three sections. However, the structure in the main body does not affect the contents described in the claims of the present invention, and the reheat dehumidification operation is performed. Other structures may be selected as long as the structure can perform the above-described operation, and there is no difference in the effect. Desirably, as described in the claims of the present invention, in order to perform dehumidification drying in the bathroom, the temperature of the second heat exchanger is the lowest and there is no temperature change, and the temperature of the first heat exchanger is the highest. Since the relative humidity of the blown air can be minimized by adopting a configuration that increases, the structure and installation of the first heat exchanger so that the refrigerant is completely vaporized immediately after passing through the second heat exchanger. More effective by adjusting the method, the structure and installation method of the second heat exchanger, and the opening of the expansion valve.

  As described above, the ventilation air-conditioning apparatus according to the present invention can shorten the drying time of the object to be dried, and can efficiently perform dehumidification. The present invention can also be applied to a ventilation air conditioner in a kitchen or a washroom.

Schematic of the living space where the ventilation air conditioner of Embodiment 1 of the present invention is installed Schematic configuration diagram of the ventilation air conditioner ((a) top view, (b) side view) Refrigeration cycle configuration diagram of the ventilation air conditioner The figure which shows the operation state list | wrist of the component in each operation mode of the ventilation air conditioner State diagram of refrigeration cycle in reheat dehumidification operation mode State diagram of refrigeration cycle of prior art ventilation air conditioner and state diagram of refrigeration cycle at high temperature ((a) State diagram of refrigeration cycle of ventilating air conditioner, (b) State of refrigeration cycle of ventilating air conditioner at high temperature Refrigeration cycle state diagram) State diagram of air in the prior art

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Living space 2 Living 3 Bathroom 4 Dressing room 5 Toilet 6 Main body 7 First exhaust duct 8 First exhaust port 9 Second exhaust duct 10 Second exhaust port 11 Third exhaust duct 12 Ventilation fan 13 Air supply port 14 Air conditioner 15 Door 16 Filter 17 First compartment 18 Second compartment 19 Compressor compartment 20 First air passage 21 First damper 22 Second air passage 23 Second damper 24 Refrigerant circuit 25 Third air passage 26 Fourth air passage 27 Third damper 28 Fourth damper 29 Fifth air passage 30 Fifth damper 31 Temperature sensor 32 Humidity sensor 33 Wind direction adjustment louver 101 Compressor 102 Condenser 103 Expansion valve 104 Evaporator 105 Suction port 106 Circulating fan 107 Blowout port 108 First heat exchanger 109 Second heat exchanger

Claims (17)

From a circulation fan that sucks air from a suction port that opens into the first indoor space and blows out air from a blowout port that opens into the first indoor space, and an exhaust port that opens into a second indoor space other than the first indoor space A ventilation fan that ventilates by sucking air and discharging it outdoors, a compressor that compresses the refrigerant, a first heat exchanger that exchanges heat between the air blown by the circulation fan and the refrigerant, and an expansion that expands the refrigerant In the ventilation air conditioner provided with the refrigerant circuit in which the refrigerant circulates in the order of the mechanism and the second heat exchanger for exchanging heat between the air blown by the ventilation fan and the refrigerant, the compressor, the first heat exchanger, and the expansion A refrigeration cycle configured by a mechanism, the second heat exchanger, and the refrigerant circuit is integrally provided in the exterior of the main body, introduces air sucked from the suction port into the second heat exchanger, and A reheat air passage for ventilating the air after passing through the heat exchanger to the first heat exchanger is provided, and the reheat dehumidifying operation is performed during the drying operation of the ventilation air conditioner, and the dry air is supplied to the first indoor space. A ventilation air conditioner characterized in that the temperature in the first indoor space falls within a predetermined temperature range. The ventilation air conditioner according to claim 1, wherein ventilation is performed by discharging air in the first indoor space to the outside by a ventilation fan during drying operation. The ventilation air conditioner according to claim 1 or 2, wherein ventilation of the first indoor space is started based on a state of air in the first indoor space sucked from the suction port during the drying operation. The ventilation of the first indoor space is started when the temperature of the air in the first indoor space sucked from the suction port during the drying operation exceeds the first predetermined temperature. Ventilation air conditioner according to. When the temperature of the air in the first indoor space sucked from the suction port during the drying operation is higher than the second predetermined temperature that is higher than the first predetermined temperature, the reheat dehumidification operation is stopped and circulated. The ventilation air conditioner according to any one of claims 1 to 4, wherein only the circulation ventilation to the first indoor space by the fan and the exhaust of the first indoor space by the ventilation fan are performed. The ventilation air conditioning according to claim 5, wherein the reheat dehumidification operation is resumed when the temperature of the air in the first indoor space is lower than the second predetermined temperature by stopping the reheat dehumidification operation. apparatus. The ventilation air conditioner according to any one of claims 1 to 3, wherein the ventilation air volume is varied according to the temperature of the air in the first indoor space sucked from the suction port during the drying operation. The ventilation according to any one of claims 1 to 3, wherein the ventilation air volume is increased as the temperature of the air in the first indoor space sucked from the suction port during the drying operation becomes higher. Air conditioner. The ventilation is stopped when the temperature of the air in the first indoor space sucked from the suction port during the drying operation is lower than the third predetermined temperature. , 7 or 8 ventilation air conditioner. When the temperature of the air in the first indoor space sucked from the suction port during the drying operation is higher than the fourth predetermined temperature which is higher than the third predetermined temperature, the reheat dehumidification operation is stopped and circulated. The ventilation air conditioner according to claim 1, 2, 3, 7, 8, or 9, characterized in that only the circulation ventilation to the first indoor space by the fan and the exhaust by the ventilation fan are performed. The reheat dehumidification operation is restarted when the temperature of the air in the first indoor space is lower than a fourth predetermined temperature by stopping the reheat dehumidification operation. Ventilation air conditioner. The ventilation air conditioner according to any one of claims 1 to 11, wherein the humidity of the air in the first indoor space sucked from the suction port during the drying operation is in a predetermined humidity range. The ventilation is started when the humidity of the air in the first indoor space sucked from the suction port during the drying operation is higher than the first predetermined humidity. Ventilation air conditioner described in 1. When the humidity of the air in the first indoor space sucked from the suction port during the drying operation is lower than the second predetermined humidity which is lower than the first predetermined humidity, the reheat dehumidification operation is stopped and the circulation fan The ventilation air conditioner according to any one of claims 1 to 13, wherein only the circulating air flow to the first indoor space is performed. The ventilation air conditioner according to any one of claims 1 to 14, wherein the ventilation air volume is varied in accordance with the humidity of the air in the first indoor space sucked from the suction port during the drying operation. The ventilation air conditioner according to any one of claims 1 to 15, wherein the ventilation air volume is increased as the humidity of the air in the first indoor space sucked from the suction port during the drying operation increases. The drying operation is terminated when the humidity of the air in the first indoor space sucked from the suction port during the drying operation is continuously lower than the third predetermined humidity for a predetermined time or more. The ventilation air conditioner in any one of 1 thru | or 16.

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