JP4735573B2 - Ventilation air conditioner - Google Patents

Description

  The present invention relates to a ventilation air conditioner that performs ventilation air conditioning of a living space such as a bathroom using a heat pump.

  As a ventilation air conditioner for a living space such as a bathroom using a conventional heat pump, one heat exchanger of the heat pump dissipates (or absorbs) heat from outside the bathroom and blows the air into the bathroom At the same time, there is one that air-conditions the bathroom by the other heat exchanger of the heat pump absorbing heat (or radiating heat) to the air discharged from the bathroom to the outside. (For example, refer to Patent Document 1).

Also, the heat pump is separated into an outdoor unit and an indoor unit, and heat is absorbed (or radiated) from outside air in the heat exchanger provided in the outdoor unit, and heat is radiated (or absorbed) into the bathroom air in the heat exchanger provided in the indoor unit. There is also what air-conditions a bathroom by doing (for example, refer to patent documents 2).
JP 2005-180712 A JP 2002-349930 A

  As described above, various types of ventilation air conditioners such as bathrooms using heat pumps have been proposed. The bathroom air conditioner exemplified in Patent Document 1 recovers heat from the air discharged from the bathroom to the outside and air-conditions the bathroom, but it is impossible to recover all the heat of the exhaust air in the heat exchanger Therefore, a part of the heat (cold heat) air-conditioned in the bathroom leaks to the outside, causing a heat loss, resulting in poor heat efficiency.

  Also, basically only heating, cooling and ventilation operations are possible, so drying the bathroom after bathing or drying clothes will make the bathroom temperature uncomfortable and it will not be possible to lower the humidity alone, so energy is the result. There was a problem of consuming a lot of energy.

  In addition, there was a draft feeling due to the movement of air supplied and exhausted in the bathroom, and there was a problem of feeling chilly during bathing heating.

  In addition, there is a problem that air conditioning in rooms other than the bathroom cannot be performed at the same time.

  In addition, there is a problem that the temperature and humidity of the bathroom cannot be finely controlled according to the purpose of use.

  Moreover, although the bathroom air conditioner illustrated by patent document 2 has little leakage of the heat which air-conditioned the bathroom, since the heat pump is installed separately in the bathroom and the outdoors, it is refrigerant piping for connecting the interior and the exterior There was a problem that construction work was necessary and the workability deteriorated, and the installation space for the outdoor unit was also required.

  In recent years, in airtight and highly heat-insulating houses, the living space is air-conditioned using air conditioners, etc., but the non-residential spaces such as under-floor spaces and ceiling space are air-conditioned including ventilation and dehumidification. In many cases, condensation occurs due to the difference in temperature and humidity in the space, condensation due to moisture from the concrete occurs, or moisture retention that occurs near water-using equipment such as bathrooms and toilets, etc. There has been a problem that volatile organic compounds (VOC) generated from building materials and the like are retained.

  The present invention solves the above-mentioned conventional problems, can save space and improve workability, can improve the thermal efficiency with less leakage of air conditioned bathroom, etc. It can reduce the energy consumption of bathroom drying and clothes drying operation, can feel warmer when bathing and heating, can also air-condition rooms other than the bathroom, can be temperature and humidity according to the purpose of use, The purpose is to provide a ventilation air conditioner that can ventilate and dehumidify non-residential spaces including underfloor spaces and ceiling space.

In order to achieve the above-mentioned object, the first problem-solving means taken by the present invention is a circulation fan that sucks air from a suction port opened in the living space A and blows air out from a blow-out port opened in the living space A. And a ventilation fan that sucks air from the suction opening opened in the living space A and the suction opening opened in the living space B), which is different from the living space A, and blows it out to the living space A or the refrigerant, and compresses the refrigerant A compressor, a first heat exchanger that exchanges heat between the air blown by the circulation fan and the refrigerant, an expansion mechanism that expands the refrigerant, and a second heat that exchanges heat between the air blown by the ventilation fan and the refrigerant. An exchanger, and a refrigerant circuit in which the refrigerant circulates in the order of the compressor, the first heat exchanger, the expansion mechanism, and the second heat exchanger, and performs heat exchange with the second heat exchanger. said the air The air fan is characterized in further comprising a passage switching mechanism for switching to blown on either outdoors and the living space A.

  The second problem solving means is that the passage switching mechanism blows out the air heat-exchanged by the second heat exchanger to either the outdoor side or the upstream side of the air passage of the first heat exchanger, and the first heat In the exchanger, the refrigerant radiates heat only to the air sucked from the living space A, or the refrigerant radiates heat to the air merged with the air sucked from the living space A and the air heat-exchanged by the second heat exchanger. It is characterized by this.

  Further, the third problem solving means includes a path switching mechanism that adjusts the amount of air blown out from the outdoor space and the living space A or the upstream side of the air path of the first heat exchanger, respectively, after heat exchanged by the second heat exchanger. A part of the air heat-exchanged by the second heat exchanger is used for cooling the living space A, and part of the air is exhausted outdoors.

  The fourth problem-solving means includes an opening / closing device that bypasses the second heat exchanger for the air in the living space A and the living space B, and is directly discharged to the outdoors during the ventilation operation. .

  The fifth problem solving means includes an opening / closing device between the suction port of the living space A and the ventilation fan or the second heat exchanger, and closes the opening / closing device during heating operation or bathing. It is a feature.

  The sixth problem solving means is characterized in that the passage switching mechanism is operated so as to exhaust all the air in the living space B to the outside in response to the ventilation operation signal of the living space B.

  In addition, the seventh problem solving means is provided with an opening / closing device between the suction port of the living space B and the ventilation fan or the second heat exchanger, and is resident during heating operation or ventilation operation other than the living space A. The opening / closing device of the living space B adjacent to the space A is closed.

  The eighth problem solving means includes an opening / closing device between the suction port of the living space A and the ventilation fan or the second heat exchanger, and the opening / closing device is installed in the living space B adjacent to the living space A. By closing and ventilating the living space B, the air conditioned in the living space A flows into the living space B.

  Further, the ninth problem solving means sucks air from a suction port opened in the living space A, and blows out the air heat-exchanged with the refrigerant passing through the first heat exchanger from the air outlet opened in the living space A. A dehumidifying fan that blows out air that has exchanged heat with the refrigerant passing through the circulation fan and the second heat exchanger is provided, and the living space A is air-conditioned by an operation combination of the circulation fan and the dehumidification fan.

  The tenth problem solving means includes a passage switching mechanism that adjusts the amount of air blown to the outside and the living space B from the air heat-exchanged by the second heat exchanger, and heat is exchanged by the second heat exchanger. A part of the air is used for cooling the living space B, and a part of the air is exhausted outdoors.

  Further, the eleventh problem solving means sucks air from a suction port opened in the living space A, and blows out air that has exchanged heat with the refrigerant passing through the first heat exchanger from the blowout port opened in the living space A. Air is sucked in from a circulation fan and a suction port opened in the living space A and the living space B, and then passes through the second heat exchanger from the air outlet opened in the living space A or the cooling / heating duct communicating with the living space B. A dehumidifying fan that blows out air that has exchanged heat with the refrigerant is provided, and the dehumidifying fan communicates with an air passage that passes through the first heat exchanger, and a living space A and a living space B are obtained by an operating combination of the circulation fan and the dehumidifying fan. It is characterized by air-conditioning.

The twelfth problem solving means includes a passage switching mechanism that adjusts the amount of air blown to the living space A and the living space B from the air heat-exchanged by the first heat exchanger or the second heat exchanger. it is characterized in that to distribute the air which has been heat-exchanged in the heat exchanger or the second heat exchanger to the living space a or residents space B.

  Further, the thirteenth problem solving means sucks air from a suction port opened in the living space A, and blows out air that has exchanged heat with the refrigerant passing through the first heat exchanger from the blowout port opened in the living space A. A cooling / heating fan that blows out to a cooling / heating duct that communicates with the circulation fan and the living space B is provided, and air is sucked in from the suction port that opens in the living space A and the living space B, and the air outlet that opens in the living space A A dehumidifying fan that blows air that has exchanged heat with the refrigerant passing through the two heat exchangers, and a ventilating fan that blows to a cooling / heating duct communicating with the outdoor space or the living space B. The living space A and the living space B are air-conditioned by the operation combination of the fans.

  The fourteenth problem solving means further comprises a flow path switching valve for switching the flow direction of the refrigerant in the order of the compressor, the second heat exchanger, the expansion mechanism, and the first heat exchanger, and the second heat exchanger In the first heat exchanger, the refrigerant dissipates heat from the air exhausted to the outside, and the refrigerant absorbs heat from the air circulating in the living space A by the circulation fan in the first heat exchanger, thereby cooling the living space A. It is characterized by doing.

  Further, the fifteenth problem solving means further comprises pressure reducing means for decompressing the refrigerant in the pipe through which the refrigerant of the first heat exchanger flows, and the refrigerant on the downstream side of the pressure reducing means absorbs heat from the air blown by the circulation fan. After that, the living space A is dehumidified by the heat dissipation of the refrigerant on the upstream side of the decompression means.

  Further, the sixteenth problem solving means is that when the living space A is heated, cooled, dehumidified, dried and air-conditioned, only the ventilation fan is operated to ventilate the indoor space where the suction port is opened. The air volume of the ventilation fan is increased.

  The seventeenth problem solving means is characterized in that the air sucked into the suction port is conditioned air that is air-conditioned by an air conditioner installed outside the living space A.

  Further, the eighteenth problem solving means is characterized in that the refrigerant absorbs heat in the second heat exchanger also from the air in the living space A discharged to the outside through the ventilation passage when the living space A is dried. To do.

  The nineteenth problem solving means is characterized in that the ventilation passage is communicated with the interior of the living space A through the suction port.

  The twentieth problem solving means is characterized by further comprising an auxiliary heater for heating at least part of the air blown by the circulation fan.

  The twenty-first problem solving means is characterized in that the auxiliary heater is a radiant heater that dissipates radiant heat in the bathroom.

  The twenty-second problem solving means is characterized by further comprising a preheating heater for preheating air before being supplied to the second heat exchanger by the ventilation fan.

  The twenty-third problem solving means switches the flow path switching valve based on the refrigerant temperature of the first heat exchanger or the second heat exchanger.

  A twenty-fourth problem-solving means includes a bypass circuit that branches from a refrigerant circuit that extends from the discharge side of the compressor to the expansion mechanism and merges with a refrigerant circuit that extends from the expansion mechanism to the suction side of the compressor; An on-off valve that opens and closes the circuit is further provided.

  The twenty-fifth problem solving means is characterized in that a refrigerant heating means for heating the refrigerant is interposed in the refrigerant circuit so as to be in series or in parallel with the second heat exchanger.

  A twenty-sixth problem solving means is characterized in that the refrigerant heating means is a refrigerant heater that heats the refrigerant by electric heating.

  The twenty-seventh problem solving means is characterized in that the refrigerant heating means is a refrigerant-water heat exchanger that heats the refrigerant by heat exchange with hot water.

  According to a twenty-eighth problem solving means, hot water boiled by a heat pump type hot water heater is used for hot water supplied to the refrigerant-water heat exchanger.

  Further, the twenty-ninth problem solving means is a drainage for draining hot water after heat exchange with the refrigerant in the refrigerant-water heat exchanger and dew condensation water generated in the first heat exchanger or the second heat exchanger. The apparatus is characterized by draining to the outside of the apparatus through a route.

  The thirtieth problem solving means is characterized in that room temperature water is supplied to the refrigerant-water heat exchanger so that the refrigerant radiates heat in the refrigerant-water heat exchanger.

  A thirty-first problem solving means is a drainage channel for draining hot water after the heat exchange with the refrigerant in the refrigerant-water heat exchanger and the dew condensation water generated in the first heat exchanger or the second heat exchanger. It is characterized by having a drain pump inside and draining the apparatus outside.

  The thirty-second problem-solving means is characterized in that the compressor is made variable in drive frequency, and the drive frequency during the dehumidifying operation is equal to or less than that during the heating operation.

  The thirty-third problem solving means uses an expansion mechanism as an electronically controlled expansion valve, and controls the operation mode, the drive frequency of the compressor, the room temperature, the rotational speed of the circulation fan, the rotational speed of the ventilation fan, and the like. It is characterized by this.

  Further, the thirty-fourth problem solving means sucks air from the underfloor space or the ceiling space by communicating either or both of the exhaust duct and the exhaust duct with the underfloor space or the ceiling space that is a non-residential space. It is characterized by exhausting outdoors.

  The thirty-fifth problem solving means is characterized in that dehumidified air is supplied to the underfloor space by communicating a cooling / heating duct with the underfloor space.

  A thirty-sixth problem solving means is characterized in that the dehumidified air is supplied to the ceiling back space by communicating the cooling / heating duct with the ceiling back space.

  The thirty-seventh problem solving means is provided with a passage switching mechanism for adjusting the amount of air blown from the cooling / heating duct to the underfloor space and the ceiling space, supplying a part of the dehumidified air to the underfloor space, and It is characterized by being supplied to a space.

  The thirty-eighth problem solving means is characterized in that a cooling / heating duct or an exhaust duct routed from the main body to the underfloor space is passed between the inner wall of the residence and the outer wall of the unit bath and connected to the underfloor space near the bathroom. is there.

  Further, the thirty-ninth problem solving means detects the temperature and humidity conditions of the space to which the exhaust duct is connected, for example, the underfloor space or the ceiling space, by the temperature and humidity detecting means disposed at the connection portion between the main body and the exhaust duct. According to the detected temperature and humidity, the drive frequency of the compressor, the expansion mechanism, the rotational speed of the circulation fan, and the rotational speed of the ventilation fan are controlled.

  According to the ventilation air conditioner of the present invention, the heat efficiency (cold heat) that air-conditions the bathroom can be improved without leaking to the outdoors, and space is saved by eliminating the need for refrigerant piping for connecting indoors and outdoors. And improvement of workability.

In the bathroom air conditioner according to claim 1, in the second heat exchanger, the living space A discharged outside by a ventilation fan, for example, the living space B other than the bathroom and the bathroom, for example, the air in the dressing room or the toilet refrigerant absorbs heat from the first heat exchanger, the circulation fan, living space a, for example, by the refrigerant in the air circulating in the bathroom is radiating, by operating the heat pump to the bathroom heating, the second heat Since the enthalpy of the air passing through the exchanger is higher than that of the outdoor air, the evaporation capacity of the refrigerant increases, and as a result, the heating capacity can be increased or the second heat exchanger can be downsized. Further, the by ventilation fan cooled in the second heat exchanger, by the air condensed discharging moisture switches the passage diverter structure, rather than the outside, passes through the second heat exchanger to the bathroom, moistened cooling and removal Since the air is blown out, it can be dehumidified by joining with the air heated by the first heat exchanger without greatly increasing the temperature of the bathroom. Can be.

  Further, in the bathroom air conditioner according to claim 2, the temperature of the bathroom is controlled by switching the passage switching mechanism and flowing the air cooled by the second heat exchanger to the upstream side of the air passage of the first heat exchanger. When the temperature rises, the pressure of the refrigerant in the first heat exchanger can be lowered to improve the long-term reliability of the compressor, etc., the temperature and humidity of the blown air is uniform, and unevenness in bathroom drying and clothing drying is reduced it can.

  Moreover, in the bathroom air conditioner according to claim 3, by adjusting the amount of air blown out to the upstream side of the air path of the first heat exchanger outdoors and the bathroom, or the air heat-exchanged by the second heat exchanger, While adjusting the temperature and humidity of the bathroom to improve the drying performance, the air quality can also be improved by adjusting the ventilation air volume from the bathroom, dressing room and toilet.

  Moreover, in the bathroom air conditioner according to claim 4, during ventilation operation from a bathroom, a dressing room, or a toilet, by bypassing the second heat exchanger, the internal resistance can be reduced and the input of the ventilation fan can be reduced.

  Further, in the bathroom air conditioner according to claim 5, the ventilation from the bathroom can be stopped while the ventilation from the dressing room and the toilet is continued by closing the opening and closing device during heating and bathing, and the bathroom is heated. The bathroom can be efficiently air-conditioned without discharging air, and the draft feeling during bathing can be reduced.

  Further, in the bathroom air conditioner according to the sixth aspect, when the toilet is ventilated, all the air sucked by the ventilation fan is discharged to the outside so that the transfer of odors from the toilet to the bathroom or the dressing room can be prevented.

  Further, in the bathroom air conditioner according to claim 7, by closing the opening / closing device of the dressing room adjacent to the bathroom at the time of heating operation or ventilation operation other than the bathroom, the bathroom is bathed and high pressure is applied to the dressing room. By not doing so, it is possible to prevent the humidity from being transferred from the bathroom.

  Further, in the bathroom air conditioner according to claim 8, an opening / closing device is provided between the bathroom and the ventilation fan or the second heat exchanger, and heating, dehumidification, drying, and cooling operation are performed together with the bathroom and the dressing room adjacent to the bathroom. When operating any of the above, by closing the switchgear and not ventilating the bathroom, by ventilating the dressing room, any of heating, dehumidification, drying, cooling air blown into the bathroom, After passing through the bathroom gallery, it flows into the dressing room that is adjacent to the negative pressure, and the dressing room can be heated, dehumidified, dried, and cooled.

  Further, in the bathroom air conditioner according to claim 9, a circulation fan that blows air passing through the first heat exchanger to the bathroom and a dehumidification fan that blows air passing through the second heat exchanger into the bathroom are provided, and the circulation fan and the dehumidification fan are provided. By combining the operation of the fans, the temperature and humidity of the air blown into the bathroom and the air volume can be controlled to quickly achieve the optimal space according to the purpose of use, and the energy consumption can be reduced.

  The bathroom air conditioner according to claim 10 further includes a passage switching mechanism that adjusts the amount of air blown out to the outside and the dressing room from the heat exchanged by the second heat exchanger, and heat is exchanged by the second heat exchanger. By using a part of the air to cool the dressing room and exhausting a part to the outdoors, the dressing room can be cooled while heating the bathroom.

  In the bathroom air conditioner according to claim 11, a circulation fan and a dehumidifying fan are provided in the first heat exchanger and the second heat exchanger, respectively, and the dehumidifying fan blows out into the bathroom or a dressing room, and the first heat exchanger In addition to being able to cool the dressing room while heating the bathroom, the bathroom and the dressing room can be simultaneously heated.

  The bathroom air conditioner according to claim 12, further comprising: a passage switching mechanism that adjusts an amount of air blown out to the bathroom and a dressing room from the air heat-exchanged by the first heat exchanger or the second heat exchanger. By using a part of the air heat-exchanged by the exchanger or the second heat exchanger for heating or cooling the bathroom or the dressing room, the optimal air conditioning according to the purpose of use is provided for the bathroom and the dressing room. it can.

  Further, in the bathroom air conditioner according to claim 13, a circulation fan and a cooling / heating fan for the first heat exchanger, a dehumidifying fan and a ventilation fan for the second heat exchanger are provided, respectively, and the bathroom, the dressing room, the toilet, and the blowout to the outdoors By controlling the air volume and temperature / humidity, it is possible to optimally air-condition the bathroom, dressing room and toilet according to the purpose of use.

  Further, in the bathroom air conditioner according to claim 14, a flow path switching valve that changes a flow direction of the refrigerant is provided, and the high-temperature and high-pressure refrigerant of the second heat exchanger dissipates heat in the room-temperature room air of the bathroom or the dressing room, and the first heat Since the exchanger more efficiently absorbs heat from the bathroom air, the thermal efficiency of the cooling operation of the bathroom can be further improved.

  Further, in the bathroom air conditioner according to claim 15, a decompression unit is provided in the pipe of the first heat exchanger, and after absorbing heat downstream of the decompression unit, heat is dissipated upstream to dehumidify the interior of the bathroom. Thus, the bathroom can be efficiently dehumidified without causing the air dehumidified by the first heat exchanger to leak outside the bathroom.

  Further, in the bathroom air conditioner according to claim 16, when the interior of the bathroom is air-conditioned, the second heat is increased by increasing the air volume of the ventilation fan as compared with the case of ventilating the indoor space other than the bathroom where the air inlet is opened. Sufficient air conditioning capacity can be obtained by increasing the amount of heat absorption or heat dissipation in the exchanger.

  Moreover, in the bathroom air conditioner according to claim 17, the air conditioner generated outside the bathroom is sucked from the air inlet and supplied to the second heat exchanger after the air conditioned by the air conditioner installed outside the bathroom. The thermal energy can be recovered to further improve the thermal efficiency.

  Furthermore, in the bathroom air conditioner according to claim 18, when the bathroom is dried, the refrigerant absorbs heat from the bathroom air discharged to the outside through the ventilation passage in the second heat exchanger, whereby the first heat The heat dissipated in the bathroom air in the exchanger can also be recovered to improve the drying efficiency.

  Further, in the ventilation air conditioner according to claim 19, by connecting the ventilation passage with the inside of the bathroom through the suction port, the suction portion of the ventilation passage can be shared with the suction port, thereby reducing the number of dust removing filters. it can.

  In the ventilation air conditioner according to the twentieth aspect, heating capacity deficiency in a low temperature environment can be compensated by heating at least a part of the air blown by the circulation fan with the auxiliary heater.

  Further, in the ventilation air conditioner such as a bathroom according to claim 21, by radiating the radiant heat of the auxiliary heater into the bathroom, the draft feeling at the time of bathing can be reduced and the comfort can be improved.

  Further, in the ventilation air conditioner according to claim 22, by preheating the air before being supplied to the second heat exchanger by the preheating heater, the heating capacity is lowered in the low temperature environment or the frost is formed on the second heat exchanger. In addition, the attached frost can be removed.

  In the ventilation air conditioner according to claim 23, when frost adheres to the first heat exchanger or the second heat exchanger at low temperatures, the flow path switching valve is switched based on the refrigerant temperature, thereby Removal can be performed.

  In the ventilation air conditioner according to claim 24, when frost adheres to the second heat exchanger at low temperatures, the high pressure side and the low pressure side of the refrigerant circuit are opened through the bypass circuit, and the high temperature refrigerant is removed from the second heat exchanger. The adhering frost can be removed by circulating the refrigerant or increasing the refrigerant pressure in the second heat exchanger.

  Further, in the ventilation air conditioner according to claim 25, the refrigerant heating means is interposed in the refrigerant circuit so as to be in series or in parallel with the second heat exchanger, and heat absorption capability such as frost adhering to the second heat exchanger is obtained. In the case of a decrease, by operating the refrigerant heating means, it is possible to secure the heat absorption capability and maintain the heating capability.

  In the ventilation air conditioner according to the twenty-sixth aspect, the refrigerant heating means can be downsized by using a refrigerant heater for heating the refrigerant by electric heat as the refrigerant heating means.

  In the ventilation air conditioner according to claim 27, the refrigerant heating means uses a refrigerant-water heat exchanger that heats the refrigerant by heat exchange with hot water, thereby reducing the amount of electric power used by the refrigerant heating means. be able to.

  Furthermore, in the ventilation air conditioner according to claim 28, the amount of electric power used by the refrigerant heating means is further reduced by using hot water boiled by a heat pump type hot water heater as hot water supplied to the refrigerant-water heat exchanger. be able to.

  Further, in the ventilation air conditioner according to claim 29, when the hot water after the heat exchange with the refrigerant is drained by the refrigerant-water heat exchanger, the first heat exchanger or the second heat exchanger occurs. Construction can be simplified without increasing the number of drainage channels by using drainage channels for draining condensed water.

  Further, in the ventilation air conditioner according to claim 30, by configuring so that the refrigerant radiates heat to the normal temperature water supplied to the refrigerant-water heat exchanger when the heat radiation capability is insufficient at a high temperature such as summertime, The lack of heat dissipation can be resolved and the cooling capacity can be maintained.

  In the ventilation air conditioner according to claim 31, the hot water after the heat exchange with the refrigerant in the refrigerant-water heat exchanger and the dew condensation water generated in the first heat exchanger or the second heat exchanger are drained. By providing a drain pump in the drainage channel, a higher drainage height can be maintained, and by saving the wastewater heat and re-evaporating the wastewater, it is possible to save construction and save energy.

  In the ventilation air conditioner according to claim 32, the drive frequency is variable, and the dehumidifying operation is made equal to or less than the heating frequency during the heating operation, thereby suppressing the temperature rise in the bathroom and reducing the amount of power used. Further reduction can be achieved.

  Further, in the ventilation air conditioner according to claim 33, the expansion mechanism is an electronically controlled expansion valve and is controlled in accordance with the operation mode, the drive frequency of the compressor, the room temperature, the rotational speed of the circulation fan, the rotational speed of the ventilation fan, etc. This makes it possible to further reduce the power consumption while making the temperature and humidity in the bathroom comfortable.

  In the ventilation air conditioner according to claim 34, either or both of the exhaust duct and the exhaust duct are communicated with an underfloor space or a ceiling space that is a non-residential space, thereby allowing air to flow from the underfloor space or the ceiling space. Ventilation of the underfloor space or the ceiling space can be performed by sucking and exhausting outdoors.

  In the ventilation air conditioner according to claim 35, the underfloor space can be dehumidified by supplying the dehumidified air to the underfloor space by connecting the cooling / heating duct to the underfloor space.

  In the ventilation air conditioner according to the thirty-sixth aspect, dehumidification of the ceiling back space can be performed by supplying the dehumidified air to the ceiling back space by connecting the cooling / heating duct to the ceiling back space.

  The ventilation air conditioner according to claim 37 further includes a passage switching mechanism that adjusts the amount of air blown from the cooling / heating duct to the underfloor space and the ceiling space, and supplies a part of the dehumidified air to the underfloor space. By supplying to the ceiling space, the underfloor space and the ceiling space can be dehumidified simultaneously.

  The ventilation air conditioner according to claim 38 is characterized in that a cooling / heating duct or an exhaust duct routed from the main body to the underfloor space is connected to the underfloor space near the bathroom through the space between the inner wall of the residence and the outer wall of the unit bath. Is.

  Further, in the ventilation air conditioner according to claim 39, the temperature and humidity conditions of the space to which the exhaust duct is connected, for example, the underfloor space or the ceiling space, are detected by the temperature and humidity detecting means disposed at the connection portion between the main body and the exhaust duct. Detecting and controlling the compressor drive frequency, expansion mechanism, circulation fan rotation speed, and ventilation fan rotation speed in response to the detected temperature and humidity, it is possible to operate efficiently when dehumidifying operation is required Can do.

According to the first aspect of the present invention, in the second heat exchanger, the living space A discharged to the outside by the ventilation fan, for example, the living space B that is a space other than the bathroom and the bathroom, for example, the air conditioning of the dressing room and the toilet refrigerant absorbs heat from the air in a first heat exchanger, the circulation fan, living space a, for example, the refrigerant radiates heat into the air circulating in the bathroom, to operate the heat pump to the bathroom heating, the second Since the enthalpy of the air passing through the heat exchanger is higher than that of outdoor air, the evaporation capacity of the refrigerant is increased, and frost formation is difficult during the heating operation in winter. Accordingly, the heating capacity can be increased, or the second heat exchanger can be reduced in size with the same capacity. In addition, the air that has been cooled by the second heat exchanger by the ventilation fan and condensed and drained from the water is switched from the outdoor side to the bathroom side by passing the second heat exchanger to the bathroom instead of outdoors. The cooled and dehumidified air is blown out and merged with the air heated by the first heat exchanger. As a result, the temperature of the bathroom can be dehumidified without significantly increasing, and the temperature and humidity can be optimized for drying the bathroom and clothes by reducing energy consumption.

  Moreover, the compressor, the 1st heat exchanger, the expansion mechanism, and the 2nd heat exchanger which comprise a refrigerant circuit are all accommodated in the ventilation air conditioner installed in the ceiling etc. of the bathroom. This eliminates the need for a space for placing the outdoor unit outdoors, eliminates the need for refrigerant piping work during construction, and saves space and improves workability.

  In the invention according to claim 2, the air cooled by the second heat exchanger is caused to flow upstream of the air passage of the first heat exchanger. Thereby, when the temperature of a bathroom becomes high temperature etc., the pressure of the refrigerant | coolant of a 1st heat exchanger can be lowered | hung and long-term reliability, such as a compressor, can be improved.

  The invention according to claim 3 adjusts the amount of air blown out from the air exchanged by the second heat exchanger to the outside and the bathroom or upstream of the air passage of the first heat exchanger. As a result, the air quality can be improved by adjusting the ventilation air volume from the bathroom, dressing room or toilet while adjusting the temperature of the bathroom to improve comfort.

  The invention according to claim 4 bypasses the second heat exchanger during ventilation operation from a bathroom, a dressing room or a toilet. This reduces the internal resistance and reduces the input of the ventilation fan.

  The invention according to claim 5 closes the switchgear during heating or bathing. As a result, the ventilation from the bathroom can be stopped while the ventilation from the dressing room and the toilet is continued, the bathroom can be efficiently air-conditioned without discharging the air that heated the bathroom, and the draft feeling during bathing can be reduced. .

  The invention described in claim 6 discharges all of the air sucked by the ventilation fan to the outside when the toilet is ventilated. This can prevent the transfer of odors from the toilet to the bathroom or dressing room.

  The invention according to claim 7 closes the opening / closing device of the dressing room adjacent to the bathroom during heating operation or ventilation operation other than the bathroom. Thereby, when the bathroom is bathing and when the humidity is high, the changing of the humidity from the bathroom can be prevented by not making the dressing room a negative pressure.

  Further, the invention according to claim 8 is provided with an opening / closing device between the bathroom and the ventilation fan or the second heat exchanger, and heating, dehumidifying, drying, cooling operation, etc., together with the bathroom and the dressing room adjacent to the bathroom. In doing so, the opening / closing device is closed to ventilate the dressing room. As a result, heating, dehumidification, drying, cooling air, etc. blown into the bathroom flow through the bathroom gallery to the adjacent, negative pressure undressing room, and the undressing room is also heated, dehumidified, dried, and air-cooled. Can do.

  The invention according to claim 9 is provided with a circulation fan that blows air passing through the first heat exchanger into the bathroom and a dehumidification fan that blows out air that passes through the second heat exchanger into the bathroom, and the circulation fan and the dehumidification fan Depending on the driving combination, the bathroom is air-conditioned. As a result, the temperature and humidity of the air blown into the bathroom can be controlled to provide an optimal space according to the purpose.

  The invention according to claim 10 is provided with a passage switching mechanism that adjusts the amount of air blown to the outside and the dressing room from the air heat-exchanged by the second heat exchanger, and the air heat-exchanged by the second heat exchanger. A part of is used for cooling the dressing room, and a part is exhausted outdoors. Thereby, the dressing room can be cooled while heating the bathroom.

  According to the eleventh aspect of the present invention, a circulation fan and a dehumidifying fan are provided in the first heat exchanger and the second heat exchanger, respectively, and the dehumidifying fan is blown into a bathroom or a dressing room, and the wind of the first heat exchanger is It is to communicate with the road. As a result, the bathroom and the dressing room can be heated at the same time, in addition to cooling the dressing room while heating the bathroom.

  The invention according to claim 12 includes a passage switching mechanism that adjusts the amount of air blown out to the bathroom and the dressing room from the air heat-exchanged by the first heat exchanger or the second heat exchanger, and the first heat exchanger Alternatively, part of the air heat-exchanged by the second heat exchanger is used for heating or cooling the bathroom or dressing room. As a result, the bathroom and the dressing room can be optimally air-conditioned.

  The invention according to claim 13 is provided with a circulation fan and a cooling / heating fan for the first heat exchanger, a dehumidifying fan and a ventilation fan for the second heat exchanger, respectively, It controls temperature and humidity. Thereby, the bathroom, the dressing room, and the toilet can be optimally air-conditioned.

  The invention according to claim 14 is provided with a flow path switching valve for changing a flow direction of the refrigerant, and the high-temperature and high-pressure refrigerant of the second heat exchanger dissipates heat at room temperature indoor air in a bathroom or a dressing room, and the first heat exchanger Are more efficient in absorbing heat from the bathroom air. Thereby, the thermal efficiency of the cooling operation of the bathroom can be further improved.

  Further, the invention according to claim 15 is to depressurize the interior of the bathroom by providing a decompression means in the pipe of the first heat exchanger, absorbing heat downstream of the decompression means and then dissipating heat upstream. is there. Thereby, the bathroom can be efficiently dehumidified without causing the air dehumidified by the first heat exchanger to leak outside the bathroom.

  Further, according to the sixteenth aspect of the present invention, when air-conditioning the interior of the bathroom, the air volume of the ventilation fan is increased as compared with the case of ventilating an indoor space other than the bathroom where the air inlet is opened. Thereby, the heat absorption amount or the heat radiation amount in the second heat exchanger can be increased to obtain a sufficient air conditioning capability.

  In the invention according to claim 17, conditioned air air-conditioned by an air conditioner installed outside the bathroom is sucked from the suction port and supplied to the second heat exchanger. Thereby, the thermal energy of the air conditioner generated outside the bathroom can be recovered to further improve the thermal efficiency.

  In the invention according to claim 18, when the bathroom is dried, the refrigerant also absorbs heat from the air in the bathroom that is discharged to the outside through the ventilation passage in the second heat exchanger. Thereby, the heat radiated to the air in the bathroom in the first heat exchanger can also be recovered to improve the drying efficiency.

  In the invention described in claim 19, the ventilation passage is communicated with the interior of the bathroom through the suction port. This makes it possible to reduce the number of dust removal filters by sharing the suction portion of the ventilation passage with the suction port.

  According to a twentieth aspect of the invention, at least a part of the air blown by the circulation fan is heated by the auxiliary heater. Thereby, the lack of the heating capability in a low-temperature environment can be compensated.

  The ventilation air conditioner according to claim 21 dissipates the radiant heat of the auxiliary heater into the bathroom. Thereby, the feeling of draft at the time of bathing can be reduced and comfort can be improved.

  The invention described in claim 22 preheats the air before being supplied to the second heat exchanger by the preheater. Thereby, the fall of the heating capability in a low-temperature environment and the frost formation to a 2nd heat exchanger can be suppressed, and the removal of the attached frost can be performed.

  The invention according to claim 23 switches the flow path switching valve based on the refrigerant temperature when frost adheres to the first heat exchanger or the second heat exchanger at a low temperature. Thereby, the attached frost can be removed.

  The invention according to claim 24 opens the high-pressure side and the low-pressure side of the refrigerant circuit through the bypass circuit when frost adheres to the second heat exchanger at low temperatures, and distributes the high-temperature refrigerant to the second heat exchanger. Or the refrigerant pressure in the second heat exchanger is increased. Thereby, the attached frost can be removed.

  Further, in the invention of claim 25, the heat absorption capability is lowered, for example, the refrigerant heating means is interposed in the refrigerant circuit so as to be in series or in parallel with the second heat exchanger, and frost adheres to the second heat exchanger. In some cases, the refrigerant heating means is actuated. Thereby, heat absorption capability can be ensured and heating capability can be maintained.

  According to a twenty-sixth aspect of the present invention, a refrigerant heater that heats the refrigerant by electric heat is used as the refrigerant heating means. Thereby, size reduction of a refrigerant | coolant heating means can be achieved.

  According to a twenty-seventh aspect of the present invention, a refrigerant-water heat exchanger that heats the refrigerant by heat exchange with hot water is used as the refrigerant heating means. Thereby, the electric power consumption in a refrigerant | coolant heating means can be reduced.

  The invention described in claim 28 uses hot water boiled by a heat pump type hot water heater as hot water supplied to the refrigerant-water heat exchanger. Thereby, the electric power consumption of a refrigerant | coolant heating means can further be reduced.

  The invention according to claim 29 is the dew condensation water generated in the first heat exchanger or the second heat exchanger when draining the hot water after heat exchange with the refrigerant in the refrigerant-water heat exchanger. The drainage route for draining water is used. Thereby, construction can be simplified without increasing the number of drainage paths.

  The invention according to claim 30 is configured such that the refrigerant dissipates heat to room temperature water supplied to the refrigerant-water heat exchanger when the heat dissipating capacity is insufficient at high temperatures such as in summer. Thereby, the lack of heat dissipation can be eliminated and the cooling capacity can be maintained.

  The invention according to claim 31 is a drainage path for draining hot water after the heat exchange with the refrigerant in the refrigerant-water heat exchanger and the dew condensation water generated in the first heat exchanger or the second heat exchanger. A drain pump is provided inside. As a result, a higher drainage height can be maintained, and it is possible to save construction and energy by reusing wastewater heat and re-evaporating wastewater.

  The invention according to claim 32 is such that the compressor is made variable in drive frequency, and the drive frequency is made equal to or lower during the dehumidifying operation than during the heating operation. Thereby, the temperature rise in a bathroom can be suppressed and the amount of electric power used can be further reduced.

  In the invention according to claim 33, the expansion mechanism is an electronically controlled expansion valve and is controlled in accordance with the operation mode, the drive frequency of the compressor, the room temperature, the rotational speed of the circulation fan, the rotational speed of the ventilation fan, etc. It is. Thereby, the amount of electric power used can be further reduced while making the temperature and humidity in the bathroom comfortable.

  In the invention according to claim 34, either one or both of the exhaust duct and the exhaust duct are connected to the underfloor space or the ceiling back space, which is a non-residential space, so that air is sucked from the underfloor space or the ceiling back space. By exhausting outdoors, it is possible to ventilate the space under the floor and the space behind the ceiling.

  In the invention according to claim 35, the underfloor space can be dehumidified by supplying the dehumidified air to the underfloor space by connecting the cooling / heating duct to the underfloor space.

  In the invention described in claim 36, the ceiling back space can be dehumidified by supplying the dehumidified air to the ceiling back space by connecting the cooling / heating duct to the ceiling back space.

  The invention according to claim 37 is provided with a passage switching mechanism for adjusting the amount of air blown from the cooling / heating duct to the underfloor space and the ceiling space, and supplies a part of the dehumidified air to the underfloor space, and a part thereof By supplying the space, the underfloor space and the ceiling space can be dehumidified simultaneously.

  Furthermore, the invention according to claim 38 is a method for connecting a cooling / heating duct or an exhaust duct routed from the main body to the underfloor space between the inner wall of the dwelling and the outer wall of the unit bath to the underfloor space near the bathroom. In particular, it is possible to intensively ventilate and dehumidify the underfloor space in the vicinity of water-using devices such as bathrooms and washrooms where moisture tends to stay.

  Further, the invention according to claim 39 detects the temperature and humidity conditions of the space to which the exhaust duct is connected, for example, the underfloor space or the ceiling space, by the temperature and humidity detecting means disposed at the connection portion between the main body and the exhaust duct. By controlling the drive frequency of the compressor, the expansion mechanism, the rotation speed of the circulation fan, and the rotation speed of the ventilation fan according to the detected temperature and humidity, the operation can be efficiently performed when the dehumidifying operation is required. .

  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, the living space A1 and the living space B2 are partitioned into a living room 3, a bathroom 4, a dressing room 5, a toilet 6, and the like. A main body 7 is installed. The main body 7 includes an exhaust duct 8 that communicates with the main body 7 and the outside, an exhaust duct 10 that communicates with the main body 7 and an air intake port 9 that is opened in the ceiling of the dressing room 5 that is one of the living spaces B2, and a living space B2. The exhaust duct 12 which connects the main body 7 and the inlet port 11 opened to the ceiling of the toilet 6 which is one of these is connected.

  In addition, a ventilation fan 13 is disposed inside the main body 7, and an exhaust duct 8 that communicates the outdoor body with the main body 7 is connected to a blowing side of the ventilation fan 13, and an exhaust duct 10 that communicates the dressing room 5 and the main body 7. And the exhaust duct 12 which connects the toilet 6 and the main body 7 is connected to the suction side of the ventilation fan 13. Therefore, when the ventilation fan 13 is operated, the air in the dressing room 5 and the toilet 6 is sucked into the ventilation fan 13 from the intake port 9 and the intake port 11 through the exhaust duct 10 and the exhaust duct 12 and discharged to the outside through the exhaust duct 8.

  When the ventilation fan 13 is continuously operated, the interior of the living space A1 and the living space B2 becomes negative pressure, so that fresh outside air is supplied from the intake port 14 opened in the wall facing the outside of the living room 3, and the living space A1 and Living space B2 will be ventilated. Since this ventilation operation needs to be performed continuously when the airtightness of the building is high (24-hour ventilation), the ventilation fan 13 has a predetermined ventilation amount, for example, about half of the living space A1 and the living space B2 in one hour. Continuous operation is performed so as to secure a ventilation amount corresponding to the volume.

  The living room 3 is provided with an air conditioner 15 for controlling the temperature of the room, and the room temperature is appropriately maintained by performing cooling operation in summer and heating operation in winter. Accordingly, as described above, when continuous ventilation operation is performed throughout the year, the low temperature air cooled by the air conditioner 15 in the living room 3 in the summertime, and the high temperature air heated by the air conditioner 15 in the winter time are in the dressing room 5. The air is sucked into the air intake 9 and the air intake 11 through the louver and undercut portions of the door 16 and the door 17 of the toilet 6, and is discharged to the outside through the main body 7 of the ventilation air conditioner.

  FIG. 2 is a configuration diagram of air passages and a refrigerant circuit diagram of the ventilation air conditioner. The main body 7 of the ventilation air conditioner shown in the figure is installed on the back of the ceiling of the bathroom 4, and the bottom of the main body 7 is placed on the ceiling surface of the bathroom 4. On the other hand, a suction port 18 and an air outlet 19 are opened, and a filter 20 is provided in the suction port 18 for detachably capturing dust.

  Further, a temperature / humidity detection device 21 for detecting air conditions such as temperature and humidity in the bathroom 4 is disposed in the vicinity of the suction port 18. The temperature / humidity detection device 21 uses, for example, a thermistor.

  In addition, a circulation passage 22 that communicates the suction port 18 and the air outlet 19 is formed inside the main body 7, and the circulation in which the air in the bathroom 4 is sucked into the circulation passage 22 from the air inlet 18 and blown out from the air outlet 19. A fan 23 is provided.

  A radiation type auxiliary heater 24 for heating at least a part of the air blown by the circulation fan 23 is provided in the vicinity of the air outlet 19 of the circulation passage 22, and the auxiliary heater 24 emits radiant heat to the bathroom 4. It arrange | positions so that it may diffuse in.

  Further, a ventilation passage 25 is formed in the main body 7 so as to communicate the suction port 18 and the suction side of the ventilation fan 13, and the ventilation passage 25 communicates with the exhaust duct 10 and the toilet 6 communicating with the dressing room 5. The exhaust duct 12 is connected. Further, an opening / closing device 26 having a damper mechanism and opening / closing the passage is disposed in a path communicating the suction port 18 in the ventilation passage 25 and the suction side of the ventilation fan 13. Therefore, when the opening / closing device 26 is set to the open state when the ventilation fan 13 is in operation, air is sucked into the main body 7 from the suction port 18, the exhaust duct 10, and the exhaust duct 12 and discharged to the outdoors.

  Further, when the opening / closing device 26 is set in a closed state, air is sucked from the exhaust duct 10 and the exhaust duct 12 and discharged to the outdoors. Therefore, when the bathroom 4 and the dressing room 5 are adjacent to each other, the dressing room 5 communicates with the exhaust duct 10 and thus has a negative pressure. As a result, the heated air in the bathroom 4 flows into the undressing room 5 through the louver provided on the door of the bathroom 4, so that the undressing room 5 is also heated.

  Further, an opening / closing device 27 that opens and closes the passage with a damper mechanism is provided in a path that connects the suction port 18 in the ventilation passage 25 and the suction side of the ventilation fan 13. Accordingly, when the opening / closing device 27 is set to the open state when the ventilation fan 13 is in operation, air is sucked into the main body 7 from the suction port 18, the exhaust duct 10 and the exhaust duct 12, and passes through a second heat exchanger described later. It will be directly sucked into the ventilation fan 13 without doing so.

  In addition, an opening / closing device 28 for opening and closing the passage of the exhaust duct 10 and an opening / closing device 29 for opening and closing the passage of the exhaust duct 12 having a damper mechanism are provided in the connection path between the exhaust duct 10 and the main body 7 of the exhaust duct 12. is doing. Accordingly, when the opening / closing device 28 or the opening / closing device 29 is set to the closed state when the ventilation fan 13 is in operation, air is not drawn from the dressing room 5 or the toilet 6, and the opening / closing device 27, the opening / closing device 28, and the opening / closing device 29 are not. Air is sucked only from the route set to the open state. The air sucked into the ventilation fan 13 in this way is discharged to the outside through the exhaust duct 8 connected to the blowing side of the ventilation fan 13.

  Further, a passage switching mechanism 30 having a damper mechanism between the ventilation fan 13 and the exhaust duct 8 to switch the passage, a blower side of the ventilation fan 13 and a suction side of the circulation fan 23, which will be described later. A dehumidifying passage 31 communicating upstream or downstream is formed, and by switching the passage switching mechanism 30, the air blown from the ventilation fan 13 is discharged to the outside through the exhaust duct 8 or flows to the suction side of the circulation fan 23. Can choose.

  Further, by setting the opening degree of the passage switching mechanism 30, the blown air from the ventilation fan 13 can be arbitrarily distributed to the exhaust duct 8 and the dehumidifying passage 31. By setting the passage switching mechanism 30 to an arbitrary opening degree, for example, 30% of the air blown from the ventilation fan 13 can be discharged to the outside through the exhaust duct 8 and 70% can be supplied to the bathroom 4 through the dehumidifying passage 31.

  Further, in the present embodiment, when the circulation fan 23 is operated and the ventilation fan 13 is stopped and the passage switching mechanism 30 has an arbitrary opening, the passage blows out from the air outlet 19 through the circulation passage 22 from the suction port 18. And the two passages that blow out from the air outlet 19 through the ventilation passage 25, the dehumidification passage 31, the circulation passage 22, and the air outlet 19. When the ventilation fan 13 is operated, it is easier to pass the latter route.

  In addition, for example, HCFC refrigerant (including chlorine, hydrogen, fluorine, and carbon atoms in the molecule) and HFC refrigerant (including hydrogen, carbon, and fluorine atoms in the molecule) as the refrigerant inside the main body 7. A refrigerant circuit 32 filled with any of natural refrigerants such as hydrocarbons and carbon dioxide is formed, and in this refrigerant circuit 32, a compressor 33 that compresses the refrigerant, and heat exchange between the supply air and the refrigerant The first heat exchanger 34 is an expansion mechanism 35 composed of an electronic expansion valve for expanding the refrigerant, and the second heat exchanger 36 is used for heat exchange between the supply air and the refrigerant. In the refrigerant circuit 32, the refrigerant compressed by the compressor 33 flows in the order of the first heat exchanger 34, the expansion mechanism 35, and the second heat exchange heat exchanger 36 and returns to the compressor 33 again (hereinafter referred to as heating). Cycle) and a path in which the refrigerant compressed by the compressor 33 flows in the order of the second heat exchanger 36, the expansion mechanism 35, and the first heat exchange heat exchanger 34 and returns to the compressor 33 (hereinafter referred to as a cooling cycle). A flow path switching valve 37 for switching between the two is interposed.

  Further, a water tray 38 and a water tray 39 are disposed below the first heat exchanger 34 and the second heat exchanger 36, and a drain pump 40 for discharging water to the water tray 38 and the water tray 39 and A drain pump 41 is provided.

  The refrigerant circuit 32 includes a bypass circuit 42 that branches from a pipe connecting the flow path switching valve 37 and the first heat exchanger 34 and merges into a pipe connecting the expansion mechanism 35 and the second heat exchanger 36. A bypass circuit 43 that branches from the pipe connecting the first heat exchanger 34 and the expansion mechanism 35 and joins the pipe connecting the second heat exchanger 36 and the flow path switching valve 37 is provided in the bypass circuit 42. In addition, an on-off valve 44 and an on-off valve 45 and a refrigerant heating means 46 are provided in the bypass circuit 43. As the refrigerant heating means 46, a refrigerant heater or a refrigerant-water heat exchanger described later can be used.

  The first heat exchanger 34 is disposed in the circulation passage 22, and the second heat exchanger 36 is disposed in the ventilation passage 25. Therefore, in the first heat exchanger 34, the refrigerant radiates heat (or absorbs heat) to the air in the bathroom 4 circulated by the circulation fan 23, and in the second heat exchanger 36, the air discharged to the outdoors by the ventilation fan 13. In contrast, the refrigerant absorbs heat (or dissipates heat).

  Further, a decompression means 49 composed of an on-off valve 47 and a capillary tube 48 is interposed in the pipe through which the refrigerant of the first heat exchanger 34 flows. The first heat exchanger 34 has a flow path switching valve 37. When the flow direction of the refrigerant is switched to the heating cycle, the air in the bathroom 4 circulated by the circulation fan 23 exchanges heat with the refrigerant flowing on the downstream side of the decompression means 49 of the first heat exchanger 34 and then upstream of the decompression means 49. It is shaped to exchange heat with the refrigerant flowing on the side. Further, a preheating heater 50 having self-temperature controllability is disposed on the windward side of the second heat exchanger 36 in the ventilation passage 25, and when the preheating heater 50 is operated, the dressing room sucked into the ventilation passage 25. 5 or the air comb of the toilet 6 can heat the air in the bathroom 4 in advance and supply it to the second heat exchanger 36.

  Moreover, although the ventilation fan 13 becomes a form arrange | positioned in the downstream of the 2nd heat exchanger 36, you may arrange | position in the upstream. When the ventilation fan 13 is disposed on the upstream side of the second heat exchanger 36, the opening / closing device 27 is disposed between the ventilation fan 13 and the second heat exchanger 36, and is attached to the second heat exchanger 36. What is necessary is just to set it as the structure which switches the passage to the made air path, and the passage to the 2nd heat exchanger 36.

  The circulation fan 23 may be disposed on the upstream side or the downstream side of the first heat exchanger 34.

(Embodiment 2)
FIG. 3 is a configuration diagram of air passages and a refrigerant circuit diagram of the ventilation air conditioner. As shown in the figure, a main body 7 of the ventilation air conditioner is installed behind the ceiling of the bathroom 4, and the ceiling of the bathroom 4 is located at the bottom of the main body 7. A suction port 18, an air outlet 19, and an air outlet 51 are opened with respect to the surface, and a filter 20 is provided in the suction port 18 for removably capturing dust.

  Further, a temperature / humidity detection device 21 for detecting air conditions such as temperature and humidity in the bathroom 4 is disposed in the vicinity of the suction port 18. The temperature / humidity detection device 21 uses, for example, a thermistor.

  In addition, a circulation passage 22 that communicates the suction port 18 and the air outlet 19 is formed inside the main body 7, and the circulation in which the air in the bathroom 4 is sucked into the circulation passage 22 from the air inlet 18 and blown out from the air outlet 19. A fan 23 is provided.

  A radiation type auxiliary heater 24 for heating at least a part of the air blown by the circulation fan 23 is provided in the vicinity of the air outlet 19 of the circulation passage 22, and the auxiliary heater 24 emits radiant heat to the bathroom 4. It arrange | positions so that it may diffuse in.

  Further, a ventilation passage 25 is formed in the main body 7 so as to communicate the suction port 18 and the suction side of the ventilation fan 13, and the ventilation passage 25 communicates with the exhaust duct 10 and the toilet 6 communicating with the dressing room 5. The exhaust duct 12 is connected.

  Further, a dehumidifying passage 52 is formed in the ventilation passage 25 so as to communicate the suction port 18 and the blowout port 51, and the dehumidification chamber 52 is provided with air in the bathroom 4 from the suction port 18 and from the exhaust duct 10 and the exhaust duct 12. 5 and a dehumidifying fan 53 that sucks in air in a living space such as the toilet 6 and blows it out from the outlet 51 is provided. Further, an opening / closing device 54 that opens and closes the passage is provided between the dehumidifying fan 53 and the air outlet 51, and when the dehumidifying fan 53 is stopped, the opening / closing device 54 is set to a closed state to ventilate the air. When the fan 13 is operating, the suction of air from the air outlet 51 is prevented. Further, an opening / closing device 26 having a damper mechanism and opening / closing the passage is disposed in a path communicating the suction port 18 in the ventilation passage 25 and the suction side of the ventilation fan 13. Therefore, if the opening / closing device 26 is set to the open state when the ventilation fan 13 and the dehumidifying fan 53 are in operation, is air sucked into the main body 7 from the suction port 18, the exhaust duct 10 and the exhaust duct 12 and discharged to the outdoors? Alternatively, it is supplied into the bathroom 4.

  Further, when the opening / closing device 26 is set in a closed state, air is sucked from the exhaust duct 10 and the exhaust duct 12 and discharged to the outside or supplied into the bathroom 4. Therefore, when the ventilation fan 13 is operated and the bathroom 4 and the dressing room 5 are adjacent to each other, the dressing room 5 communicates with the exhaust duct 10 and thus has a negative pressure. As a result, the heated air in the bathroom 4 flows into the undressing room 5 through the louver provided on the door of the bathroom 4, so that the undressing room 5 is also heated.

  Further, an opening / closing device 27 that opens and closes the passage with a damper mechanism is provided in a path that connects the suction port 18 in the ventilation passage 25 and the suction side of the ventilation fan 13. Accordingly, when the opening / closing device 27 is set to the open state when the ventilation fan 13 is in operation, air is sucked into the main body 7 from the suction port 18, the exhaust duct 10 and the exhaust duct 12, and passes through a second heat exchanger described later. It will be directly sucked into the ventilation fan 13 without doing so.

  In addition, an opening / closing device 28 for opening and closing the passage of the exhaust duct 10 and an opening / closing device 29 for opening and closing the passage of the exhaust duct 12 having a damper mechanism are provided in the connection path between the exhaust duct 10 and the main body 7 of the exhaust duct 12. is doing. Accordingly, when the opening / closing device 28 or the opening / closing device 29 is set to the closed state when the ventilation fan 13 is in operation, the air is not sucked from the dressing room 5 or the toilet 6, and the opening / closing device 26, the opening / closing device 28, and the opening / closing device 29. Air is sucked only from the route set to the open state. The air sucked into the ventilation fan 13 in this way is discharged to the outside through the exhaust duct 8 connected to the blowing side of the ventilation fan 13.

  Further, an exhaust duct 8 and a cooling / heating duct 55 are disposed on the outlet side of the ventilation fan 13, and a passage switching mechanism 56 having a damper mechanism is provided between the exhaust duct 8 and the cooling / heating duct 55 to switch the passage. By switching this passage switching mechanism, it is possible to select whether the air blown from the ventilation fan 13 is discharged to the outside through the exhaust duct 8 or supplied to the living space such as the dressing room 5 and the toilet 6 through the cooling / heating duct 55. .

  Further, by setting the opening degree of the passage switching mechanism 56, the blown air from the ventilation fan 13 can be arbitrarily distributed to the exhaust duct 8 and the cooling / heating duct 55. By setting the passage switching mechanism 56 to an arbitrary opening degree, for example, 30% of the air blown from the ventilation fan 13 can be discharged to the outside through the exhaust duct 8 and 70% can be supplied to the living space through the cooling / heating duct 55. The cooling / heating duct 55 communicates from the main body 7 to a living space such as the dressing room 5 and the toilet 6.

  In addition, for example, HCFC refrigerant (including chlorine, hydrogen, fluorine, and carbon atoms in the molecule) and HFC refrigerant (including hydrogen, carbon, and fluorine atoms in the molecule) as the refrigerant inside the main body 7. A refrigerant circuit 32 filled with any of natural refrigerants such as hydrocarbons and carbon dioxide is formed, and in this refrigerant circuit 32, a compressor 33 that compresses the refrigerant, and heat exchange between the supply air and the refrigerant The first heat exchanger 34 is an expansion mechanism 35 composed of an electronic expansion valve for expanding the refrigerant, and the second heat exchanger 36 is used for heat exchange between the supply air and the refrigerant. In the refrigerant circuit 32, the refrigerant compressed by the compressor 33 flows in the order of the first heat exchanger 34, the expansion mechanism 35, and the second heat exchange heat exchanger 36 and returns to the compressor 33 again (hereinafter referred to as heating). Cycle) and a path in which the refrigerant compressed by the compressor 33 flows in the order of the second heat exchanger 36, the expansion mechanism 35, and the first heat exchange heat exchanger 34 and returns to the compressor 33 (hereinafter referred to as a cooling cycle). A flow path switching valve 37 for switching between the two is interposed.

  Further, a water tray 38 and a water tray 39 are disposed below the first heat exchanger 34 and the second heat exchanger 36, and a drain pump 40 for discharging water to the water tray 38 and the water tray 39 and A drain pump 41 is provided.

  The refrigerant circuit 32 includes a bypass circuit 42 that branches from a pipe connecting the flow path switching valve 37 and the first heat exchanger 34 and merges into a pipe connecting the expansion mechanism 35 and the second heat exchanger 36. A bypass circuit 43 that branches from the pipe connecting the first heat exchanger 34 and the expansion mechanism 35 and joins the pipe connecting the second heat exchanger 36 and the flow path switching valve 37 is provided in the bypass circuit 42. In addition, an on-off valve 44 and an on-off valve 45 and a refrigerant heating means 46 are provided in the bypass circuit 43. As the refrigerant heating means 46, a refrigerant heater or a refrigerant-water heat exchanger described later can be used.

  The first heat exchanger 34 is disposed in the circulation passage 22, and the second heat exchanger 36 is disposed in the ventilation passage 25 and the dehumidification passage 52. Accordingly, in the first heat exchanger 34, the refrigerant radiates heat (or absorbs heat) to the air in the bathroom 4 circulated by the circulation fan 23, and in the second heat exchanger 36, the ventilation fan 13 discharges the outdoor or dressing room. The refrigerant absorbs heat (or radiates heat) to the air supplied to the living space such as 5 and the toilet 6 and the air blown into the bathroom 4 by the dehumidifying fan 53.

  Further, a decompression means 49 composed of an on-off valve 47 and a capillary tube 48 is interposed in the pipe through which the refrigerant of the first heat exchanger 34 flows. The first heat exchanger 34 has a flow path switching valve 37. When the flow direction of the refrigerant is switched to the heating cycle, the air in the bathroom 4 circulated by the circulation fan 23 exchanges heat with the refrigerant flowing on the downstream side of the decompression means 49 of the first heat exchanger 34 and then upstream of the decompression means 49. It is shaped to exchange heat with the refrigerant flowing on the side. Further, a preheating heater 50 having self-temperature controllability is disposed on the windward side of the second heat exchanger 36 in the ventilation passage 25, and when the preheating heater 50 is operated, the dressing room sucked into the ventilation passage 25. 5 or the air comb of the toilet 6 can heat the air in the bathroom 4 in advance and supply it to the second heat exchanger 36.

  Moreover, although the ventilation fan 13 becomes a form arrange | positioned in the downstream of the 2nd heat exchanger 36, you may arrange | position in the upstream. When the ventilation fan 13 is disposed on the upstream side of the second heat exchanger 36, the opening / closing device 27 is disposed between the ventilation fan 13 and the second heat exchanger 36, and is attached to the second heat exchanger 36. What is necessary is just to set it as the structure which switches the passage to the made air path, and the passage to the 2nd heat exchanger 36.

  The dehumidifying fan 53 may be disposed on the upstream side or the downstream side of the second heat exchanger 36, and the circulation fan 23 is disposed on the upstream side of the first heat exchanger 34. Alternatively, it may be disposed on the downstream side.

(Embodiment 3)
FIG. 4 is a configuration diagram of air passages and a refrigerant circuit diagram of the ventilation air conditioner. The main body 7 of the ventilation air conditioner shown in the figure is installed on the back of the ceiling of the bathroom 4, and the bottom of the main body 7 is placed on the ceiling surface of the bathroom 4. On the other hand, a suction port 18, an air outlet 19, and an air outlet 57 are opened, and a filter 20 is provided in the suction port 18 for detachably capturing dust.

  Further, a temperature / humidity detection device 21 for detecting air conditions such as temperature and humidity in the bathroom 4 is disposed in the vicinity of the suction port 18. The temperature / humidity detection device 21 uses, for example, a thermistor.

  In addition, a circulation passage 22 that communicates the suction port 18 and the air outlet 19 is formed inside the main body 7, and the circulation in which the air in the bathroom 4 is sucked into the circulation passage 22 from the air inlet 18 and blown out from the air outlet 19. A fan 23 is provided.

  A radiation type auxiliary heater 24 for heating at least a part of the air blown by the circulation fan 23 is provided in the vicinity of the air outlet 19 of the circulation passage 22, and the auxiliary heater 24 emits radiant heat to the bathroom 4. It arrange | positions so that it may diffuse in.

  Further, a ventilation passage 25 is formed in the main body 7 so as to communicate the suction port 18 and the suction side of the ventilation fan 13, and the ventilation passage 25 communicates with the exhaust duct 10 and the toilet 6 communicating with the dressing room 5. The exhaust duct 12 is connected.

  Further, a dehumidifying passage 58 that communicates the ventilation passage 25 and the outlet 57 is formed. In the dehumidifying passage 58, the air in the bathroom 4 from the suction port 18, the exhaust duct 10 and the exhaust duct 12 through the dressing room 5 and the toilet 6. A dehumidifying fan 53 that sucks in air in the living space and the like and blows it out from the air outlet 57 is provided. Further, an opening / closing device 59 and an opening / closing device 60 are disposed between the first heat exchanger 34 and the dehumidifying fan 53 and between the second heat exchanger 36 and the dehumidifying fan 53 to have a damper mechanism to open and close the passage. .

  Further, an opening / closing device 26 having a damper mechanism and opening / closing the passage is disposed in a passage communicating the suction port 18 and the inside of the ventilation passage 25. Therefore, if the opening / closing device 26 is set to the open state when the ventilation fan 13 and the dehumidifying fan 53 are in operation, is air sucked into the main body 7 from the suction port 18, the exhaust duct 10 and the exhaust duct 12 and discharged to the outdoors? Or it will be supplied into the bathroom 4.

  Further, when the opening / closing device 26 is set in a closed state, air is sucked from the exhaust duct 10 and the exhaust duct 12 and discharged to the outside or supplied into the bathroom 4. Therefore, when the ventilation fan 13 is operated and the bathroom 4 and the dressing room 5 are adjacent to each other, the dressing room 5 communicates with the exhaust duct 10 and thus has a negative pressure. As a result, the heated air in the bathroom 4 flows into the undressing room 5 through the louver provided on the door of the bathroom 4, so that the undressing room 5 is also heated.

  In addition, an opening / closing device 27 that opens and closes the passage with a damper mechanism is disposed in the passage that connects the inside of the ventilation passage 25 and the suction side of the ventilation fan 13. Accordingly, when the opening / closing device 27 is set to the open state when the ventilation fan 13 is in operation, air is sucked into the main body 7 from the suction port 18, the exhaust duct 10 and the exhaust duct 12, and passes through a second heat exchanger described later. It will be directly sucked into the ventilation fan 13 without doing so.

  In addition, an opening / closing device 28 for opening and closing the passage of the exhaust duct 10 and an opening / closing device 29 for opening and closing the passage of the exhaust duct 12 having a damper mechanism are provided in the connection path between the exhaust duct 10 and the main body 7 of the exhaust duct 12. is doing. Therefore, when the opening / closing device 28 or the opening / closing device 29 is set to the closed state when the ventilation fan 13 and the dehumidifying fan 53 are in operation, the opening / closing device 26, the opening / closing device 28, and the opening / closing are not sucked from the dressing room 5 or the toilet 6. Air is sucked only from the path of the device 29 that is set to the open state. The air sucked into the ventilation fan 13 in this way is discharged to the outside through the exhaust duct 8 connected to the blowing side of the ventilation fan 13.

  Further, a cooling / heating duct 61 is provided on the blowing side of the dehumidifying fan 53, and a passage switching mechanism 62 having a damper mechanism is provided between the dehumidifying passage 58 and the cooling / heating duct 61 to switch the passage. By switching the mechanism, it is possible to select whether the air blown from the dehumidifying fan 53 is supplied into the bathroom 4 through the dehumidifying passage 58 or supplied to the living space such as the dressing room 5 and the toilet 6 through the cooling / heating duct 61.

  Further, by setting the opening degree of the passage switching mechanism 62, the air blown from the dehumidifying fan 53 can be arbitrarily distributed to the dehumidifying passage 58 and the cooling / heating duct 61. By setting the passage switching mechanism 62 to an arbitrary opening, for example, 30% of the air blown from the dehumidifying fan 53 can be supplied to the bathroom 4 through the dehumidifying passage 58 and 70% can be supplied to the living space through the cooling / heating duct 61. . The cooling / heating duct 61 communicates with the living space such as the dressing room 5 and the toilet 6 from the main body 7.

  In addition, for example, HCFC refrigerant (including chlorine, hydrogen, fluorine, and carbon atoms in the molecule) and HFC refrigerant (including hydrogen, carbon, and fluorine atoms in the molecule) as the refrigerant inside the main body 7. A refrigerant circuit 32 filled with any of natural refrigerants such as hydrocarbons and carbon dioxide is formed, and in this refrigerant circuit 32, a compressor 33 that compresses the refrigerant, and heat exchange between the supply air and the refrigerant The first heat exchanger 34 is an expansion mechanism 35 composed of an electronic expansion valve for expanding the refrigerant, and the second heat exchanger 36 is used for heat exchange between the supply air and the refrigerant. In the refrigerant circuit 32, the refrigerant compressed by the compressor 33 flows in the order of the first heat exchanger 34, the expansion mechanism 35, and the second heat exchange heat exchanger 36 and returns to the compressor 33 again (hereinafter referred to as heating). Cycle) and a path in which the refrigerant compressed by the compressor 33 flows in the order of the second heat exchanger 36, the expansion mechanism 35, and the first heat exchange heat exchanger 34 and returns to the compressor 33 (hereinafter referred to as a cooling cycle). A flow path switching valve 37 for switching between the two is interposed.

  Further, a water tray 38 and a water tray 39 are disposed below the first heat exchanger 34 and the second heat exchanger 36, and a drain pump 40 for discharging water to the water tray 38 and the water tray 39 and A drain pump 41 is provided.

  The refrigerant circuit 32 includes a bypass circuit 42 that branches from a pipe connecting the flow path switching valve 37 and the first heat exchanger 34 and merges into a pipe connecting the expansion mechanism 35 and the second heat exchanger 36. A bypass circuit 43 that branches from the pipe connecting the first heat exchanger 34 and the expansion mechanism 35 and joins the pipe connecting the second heat exchanger 36 and the flow path switching valve 37 is provided in the bypass circuit 42. In addition, an on-off valve 44 and an on-off valve 45 and a refrigerant heating means 46 are provided in the bypass circuit 43. As the refrigerant heating means 46, a refrigerant heater or a refrigerant-water heat exchanger described later can be used.

  Further, the compressor 33 may use a variable drive frequency.

  The first heat exchanger 34 is disposed in the circulation passage 22 and the dehumidification passage 58, and the second heat exchanger 36 is disposed in the ventilation passage 25 and the dehumidification passage 58. Accordingly, in the first heat exchanger 34, the air in the bathroom 4 circulated by the circulation fan 23, the air supplied to the living space such as the dressing room 5 and the toilet 6, and the air blown into the bathroom 4 by the dehumidifying fan 53 are used. The refrigerant radiates heat (or absorbs heat), and in the second heat exchanger 36, air exhausted outdoors by the ventilation fan 13 or air supplied to the living space such as the dressing room 5 and the toilet 6 and the dehumidifying fan 53 The refrigerant absorbs heat (or releases heat) from the air blown into the bathroom 4.

  Further, a decompression means 49 composed of an on-off valve 47 and a capillary tube 48 is interposed in the pipe through which the refrigerant of the first heat exchanger 34 flows. The first heat exchanger 34 has a flow path switching valve 37. When the refrigerant flow direction is switched to the heating cycle, the air in the bathroom 4 circulated by the circulation fan 23 and the air circulated to the bathroom 4 by the dehumidifying fan 53 or the air supplied to the cooling / heating duct 61 are supplied to the first heat exchanger 34. After the heat exchange with the refrigerant flowing downstream of the decompression means 49, the heat exchange with the refrigerant flowing upstream of the decompression means 49 is performed. Further, a preheating heater 50 having self-temperature controllability is disposed on the windward side of the second heat exchanger 36 in the ventilation passage 25, and when the preheating heater 50 is operated, the dressing room sucked into the ventilation passage 25. 5 or the air comb of the toilet 6 can heat the air in the bathroom 4 in advance and supply it to the second heat exchanger 36.

  Moreover, although the ventilation fan 13 becomes a form arrange | positioned in the downstream of the 2nd heat exchanger 36, you may arrange | position in the upstream. When the ventilation fan 13 is disposed on the upstream side of the second heat exchanger 36, the opening / closing device 27 is disposed between the ventilation fan 13 and the second heat exchanger 36, and is attached to the second heat exchanger 36. What is necessary is just to set it as the structure which switches the passage to the made air path, and the passage to the 2nd heat exchanger 36.

  The dehumidifying fan 53 may be disposed on the upstream side or the downstream side of the second heat exchanger 36 and the first heat exchanger 34, and the circulation fan 23 is disposed on the first heat exchanger 34. It may be arranged on the upstream side or on the downstream side.

(Embodiment 4)
FIG. 5 is a configuration diagram of air passages and a refrigerant circuit diagram of the ventilation air conditioner. The main body 7 of the ventilation air conditioner shown in the figure is installed on the back of the ceiling of the bathroom 4, and the bottom of the main body 7 is placed on the ceiling surface of the bathroom 4. On the other hand, the suction port 18, the air outlet 19, and the air outlet 51 are opened, and a filter 20 is provided in the suction port 18 for detachably capturing dust.

  Further, a temperature / humidity detection device 21 for detecting air conditions such as temperature and humidity in the bathroom 4 is disposed in the vicinity of the suction port 18. The temperature / humidity detection device 21 uses, for example, a thermistor.

  In addition, a circulation passage 22 that communicates the suction port 18 and the air outlet 19 is formed inside the main body 7, and the circulation in which the air in the bathroom 4 is sucked into the circulation passage 22 from the air inlet 18 and blown out from the air outlet 19. A fan 23 is provided.

  A radiation type auxiliary heater 24 for heating at least a part of the air blown by the circulation fan 23 is provided in the vicinity of the air outlet 19 of the circulation passage 22, and the auxiliary heater 24 emits radiant heat to the bathroom 4. It arrange | positions so that it may diffuse in.

  A cooling / heating passage 64 is formed between the suction port 18 and a cooling / heating duct 63 communicating with a living space such as the dressing room 5 and the toilet 6, and the bathroom 4 is inserted into the cooling / heating passage 64 from the suction port 18. A cooling / heating fan 65 is provided which sucks the air and blows it out to a cooling / heating duct 63 communicating with the dressing room 5 and the toilet 6. An opening / closing device 66 having a damper mechanism is provided on the suction side of the cooling / heating fan 65 in the cooling / heating passage 64 to open and close the passage, and when the cooling / heating fan 65 is stopped, the circulation fan 23 is operated by setting the closed state. In this case, air is prevented from being sucked from the cooling / heating duct 63 communicating with the living space such as the dressing room 5 and the toilet 6.

  Further, a ventilation passage 25 is formed in the main body 7 so as to communicate the suction port 18 and the suction side of the ventilation fan 13, and the ventilation passage 25 communicates with the exhaust duct 10 and the toilet 6 communicating with the dressing room 5. The exhaust duct 12 is connected.

  Further, a dehumidifying passage 52 is formed in the ventilation passage 25 so as to communicate the suction port 18 and the blowout port 51, and the dehumidification chamber 52 is provided with air in the bathroom 4 from the suction port 18 and from the exhaust duct 10 and the exhaust duct 12. 5 and a dehumidifying fan 53 that sucks in air in a living space such as the toilet 6 and blows it out from the outlet 51 is provided. Further, an opening / closing device 54 that opens and closes the passage is provided between the dehumidifying fan 53 and the air outlet 51, and when the dehumidifying fan 53 is stopped, the opening / closing device 54 is set to a closed state to ventilate the air. When the fan 13 is operating, the suction of air from the air outlet 51 is prevented. Further, an opening / closing device 26 having a damper mechanism and opening / closing the passage is disposed in a path communicating the suction port 18 in the ventilation passage 25 and the suction side of the ventilation fan 13. Therefore, if the opening / closing device 26 is set to the open state when the ventilation fan 13 and the dehumidifying fan 53 are in operation, is air sucked into the main body 7 from the suction port 18, the exhaust duct 10 and the exhaust duct 12 and discharged to the outdoors? Alternatively, it is supplied into the bathroom 4.

  Further, when the opening / closing device 26 is set in a closed state, air is sucked from the exhaust duct 10 and the exhaust duct 12 and discharged to the outside or supplied into the bathroom 4. Therefore, when the ventilation fan 13 is operated and the bathroom 4 and the dressing room 5 are adjacent to each other, the dressing room 5 communicates with the exhaust duct 10 and thus has a negative pressure. As a result, the heated air in the bathroom 4 flows into the undressing room 5 through the louver provided on the door of the bathroom 4, so that the undressing room 5 is also heated.

  Further, an opening / closing device 27 that opens and closes the passage with a damper mechanism is provided in a path that connects the suction port 18 in the ventilation passage 25 and the suction side of the ventilation fan 13. Accordingly, when the opening / closing device 27 is set to the open state when the ventilation fan 13 is in operation, air is sucked into the main body 7 from the suction port 18, the exhaust duct 10 and the exhaust duct 12, and passes through a second heat exchanger described later. It will be directly sucked into the ventilation fan 13 without doing so.

  In addition, an opening / closing device 28 for opening and closing the passage of the exhaust duct 10 and an opening / closing device 29 for opening and closing the passage of the exhaust duct 12 having a damper mechanism are provided in the connection path between the exhaust duct 10 and the main body 7 of the exhaust duct 12. is doing. Therefore, when the opening / closing device 28 or the opening / closing device 29 is set to the closed state when the ventilation fan 13 and the dehumidifying fan 53 are in operation, the opening / closing device 26, the opening / closing device 28, and the opening / closing are not sucked from the dressing room 5 or the toilet 6. Air is sucked only from the path of the device 29 that is set to the open state. The air sucked into the ventilation fan 13 in this way is discharged to the outside through the exhaust duct 8 connected to the blowing side of the ventilation fan 13.

  Further, an exhaust duct 8 and a cooling / heating duct 55 are disposed on the outlet side of the ventilation fan 13, and a passage switching mechanism 30 having a damper mechanism is provided between the exhaust duct 8 and the cooling / heating duct 55 to switch the passage. By switching this passage switching mechanism, it is possible to select whether the air blown from the ventilation fan 13 is discharged to the outside through the exhaust duct 8 or supplied to the living space such as the dressing room 5 and the toilet 6 through the cooling / heating duct 55. .

  Further, by setting the opening degree of the passage switching mechanism 30, the air blown from the ventilation fan 13 can be arbitrarily distributed to the exhaust duct 8 and the cooling / heating duct 55. By setting the passage switching mechanism 30 to an arbitrary opening degree, for example, 30% of the air blown from the ventilation fan 13 can be discharged to the outside through the exhaust duct 8 and 70% can be supplied to the living space through the cooling / heating duct 55. The cooling / heating duct 55 and the cooling / heating duct 63 communicate with the living space such as the dressing room 5 and the toilet 6 from the main body 7.

  Further, the ventilation fan 13 and the dehumidifying fan 53 may be disposed on the upstream side or the downstream side of the second heat exchanger 36, and the circulation fan 23 and the cooling / heating fan 65 may be disposed on the first heat exchanger. It may be arranged on the upstream side or the downstream side of 34.

  In addition, for example, HCFC refrigerant (including chlorine, hydrogen, fluorine, and carbon atoms in the molecule) and HFC refrigerant (including hydrogen, carbon, and fluorine atoms in the molecule) as the refrigerant inside the main body 7. A refrigerant circuit 32 filled with any of natural refrigerants such as hydrocarbons and carbon dioxide is formed, and in this refrigerant circuit 32, a compressor 33 that compresses the refrigerant, and heat exchange between the supply air and the refrigerant The first heat exchanger 34 is an expansion mechanism 35 composed of an electronic expansion valve for expanding the refrigerant, and the second heat exchanger 36 is used for heat exchange between the supply air and the refrigerant. In the refrigerant circuit 32, the refrigerant compressed by the compressor 33 flows in the order of the first heat exchanger 34, the expansion mechanism 35, and the second heat exchange heat exchanger 36 and returns to the compressor 33 again (hereinafter referred to as heating). Cycle) and a path in which the refrigerant compressed by the compressor 33 flows in the order of the second heat exchanger 36, the expansion mechanism 35, and the first heat exchange heat exchanger 34 and returns to the compressor 33 (hereinafter referred to as a cooling cycle). A flow path switching valve 37 for switching between the two is interposed.

  Further, a water tray 38 and a water tray 39 are disposed below the first heat exchanger 34 and the second heat exchanger 36, and a drain pump 40 for discharging water to the water tray 38 and the water tray 39 and A drain pump 41 is provided.

  The refrigerant circuit 32 includes a bypass circuit 42 that branches from a pipe connecting the flow path switching valve 37 and the first heat exchanger 34 and merges into a pipe connecting the expansion mechanism 35 and the second heat exchanger 36. A bypass circuit 43 that branches from the pipe connecting the first heat exchanger 34 and the expansion mechanism 35 and joins the pipe connecting the second heat exchanger 36 and the flow path switching valve 37 is provided in the bypass circuit 42. In addition, an on-off valve 44 and an on-off valve 45 and a refrigerant heating means 46 are provided in the bypass circuit 43. As the refrigerant heating means 46, a refrigerant heater or a refrigerant-water heat exchanger described later can be used.

  The first heat exchanger 34 is disposed in the circulation passage 22 and the cooling / heating passage 64, and the second heat exchanger 36 is disposed in the ventilation passage 25 and the dehumidification passage 52. Therefore, in the first heat exchanger 34, the refrigerant dissipates heat (or absorbs heat) from the air in the bathroom 4 circulated by the circulation fan 23 or the air supplied to the living space such as the dressing room 5 and the toilet 6 by the cooling / heating fan 65. In the second heat exchanger 36, the refrigerant is exhausted to the outside by the ventilation fan 13 or supplied to the living space such as the dressing room 5 and the toilet 6 and the air blown into the bathroom 4 by the dehumidifying fan 53. Will absorb heat (or dissipate heat).

  Further, a decompression means 49 composed of an on-off valve 47 and a capillary tube 48 is interposed in the pipe through which the refrigerant of the first heat exchanger 34 flows. The first heat exchanger 34 has a flow path switching valve 37. When the refrigerant flow direction is switched to the heating cycle, the air in the bathroom 4 circulated by the circulation fan 23 and the air supplied to the cooling / heating duct 63 by the cooling / heating fan 65 are downstream of the decompression means 49 of the first heat exchanger 34. After the heat exchange with the refrigerant flowing through the refrigerant, the heat exchange with the refrigerant flowing upstream of the decompression means 49 is performed. Further, a preheating heater 50 having self-temperature controllability is disposed on the windward side of the second heat exchanger 36 in the ventilation passage 25, and when the preheating heater 50 is operated, the dressing room sucked into the ventilation passage 25. 5 or the air comb of the toilet 6 can heat the air in the bathroom 4 in advance and supply it to the second heat exchanger 36.

  Moreover, although the ventilation fan 13 becomes a form arrange | positioned in the downstream of the 2nd heat exchanger 36, you may arrange | position in the upstream. When the ventilation fan 13 is disposed on the upstream side of the second heat exchanger 36, the opening / closing device 27 is disposed between the ventilation fan 13 and the second heat exchanger 36, and is attached to the second heat exchanger 36. What is necessary is just to set it as the structure which switches the passage to the made air path, and the passage to the 2nd heat exchanger 36.

  The dehumidifying fan 53 may be disposed on the upstream side or the downstream side of the second heat exchanger 36, and the circulation fan 23 is disposed on the upstream side of the first heat exchanger 34. Alternatively, the cooling / heating fan 65 may be disposed on the upstream side or the downstream side of the first heat exchanger 34.

  FIG. 6 is a schematic configuration diagram of a refrigerant heater that can be employed in the refrigerant heating means 46. As shown in the figure, the refrigerant heater 67 has a refrigerant pipe 68 formed by winding a refrigerant pipe through which the refrigerant passes in a coil shape. A heating tube 69 formed in a U-shape on the inner peripheral side of the coiled refrigerant pipe 68, and the surface of the refrigerant pipe 68 excluding the inlet 70 and outlet 71 and the terminal 72 of the heating pipe 69. The heat transfer tube 73 is formed in a solid cylindrical shape by casting a metal material such as aluminum so as to cover the entire surface.

  When a predetermined voltage is applied to the terminal portion 72 of the electric heating tube 69, the electric heating tube 69 generates heat, and this heat is conducted through the heat transfer cylinder 73 to heat the refrigerant pipe 68 disposed on the outer periphery of the electric heating tube 69. To do. Refrigerant is introduced into the refrigerant pipe 68 from the inlet 70, and the outlet of the refrigerant pipe 68 is heated through the heat transfer cylinder 73 in the course of flowing through the coiled portion covered with the heat transfer cylinder 73. Guided to part 71. In this way, the refrigerant heater 67 heats the refrigerant, but the electric heat pipe 69 arranged at the center of the heat transfer cylinder 73 is connected to the refrigerant pipe 68 arranged in the outer peripheral direction. Therefore, heat leakage to the outside is reduced and heat generated by the electric heat pipe 69 can be conducted through the heat transfer cylinder 73 to uniformly heat the refrigerant pipe 68, thereby improving the heating efficiency and reducing the refrigerant. The heating means 46 can be downsized.

  FIG. 7 is a schematic cross-sectional view of a refrigerant-water heat exchanger that can be employed in the refrigerant heating means 46. As shown in the figure, the refrigerant-water heat exchanger 74 is a hot water supply through which hot water from a heat pump hot water heater 75 flows. The heat exchanger has a double pipe structure in which a refrigerant pipe 77 through which refrigerant flows is arranged inside the pipe 76. The refrigerant pipe 77 is bifurcated inside the hot water supply pipe 76 and is formed in a twisted shape in which each of the branched branches is spirally twisted, thereby increasing the heat transfer area and improving the heat exchange efficiency. I am trying. The hot water flowing into the refrigerant-water heat exchanger 74 from the hot water supply inflow part 78 of the hot water supply line 76 flows through the outer periphery of the refrigerant pipe 77 and flows out from the hot water supply outflow part 79 to the outside of the refrigerant-water heat exchanger 74. Then, it is dropped on the drain pan 80 below the hot water supply / outflow part 79.

  The drain pan 80 also serves as a drain receiver for the drain water condensed on the first heat exchanger 34 and the second heat exchanger 36, and the hot water dropped on the drain pan 80 is supplied to the first heat exchanger 34 and the second heat exchanger 36. The water is drained from the drain pipe 81 to the outside of the main body 7 together with the drain water condensed on the exchanger 36. On the other hand, the refrigerant that has flowed into the refrigerant-water heat exchanger 74 from the refrigerant inflow portion 82 of the refrigerant pipe 77 flows into the twisted pipe 83 having a twisted structure in a direction opposite to the flow of hot water, and this process. Thus, it is heated by heat exchange with hot water and flows out from the refrigerant outflow portion 84.

  The hot water used for heating the refrigerant is hot water boiled using heat of the atmosphere in the heat pump hot water heater 75, so that the heating efficiency of the refrigerant heating means 46 is improved and the running cost can be reduced. Moreover, not the hot hot water boiled by the hot water heater but the normal temperature hot water can be supplied to the hot water supply pipe 76 as it is. In this case, if the flow path switching valve 37 is switched to the cooling cycle side and the on-off valve 44 is set to the open state, the high-temperature and high-pressure refrigerant compressed by the compressor 33 is supplied to the refrigerant pipe 77 and heat with normal temperature water. It is also possible to cool the refrigerant during the exchange process.

(Embodiment 5)
FIG. 8 is an installation diagram of the ventilation air conditioner. The main body 7 of the ventilation air conditioner is installed behind the ceiling of the living space A1, and the exhaust duct 10 connected to the main body 7 communicates with the underfloor space 85. Then, the air in the underfloor space 85 sucked from the intake port 87 is sucked into the main body 7.

  Further, the exhaust duct 12 connected to the main body 7 communicates with the ceiling space 86, and sucks the sucked air in the ceiling space 86 into the main body 7. The air sucked into the main body 7 is exchanged heat inside the main body 7 and then discharged to the outside through the exhaust duct 8 or blown out to the underfloor space 85 through the cooling / heating duct 61 and the outlet 88 as dehumidified air. Alternatively, the air is blown into the ceiling space 86 by switching the passage switching mechanism 89 disposed in the middle of the cooling / heating duct 61. By adjusting the opening degree of the passage switching mechanism 89, the amount of dehumidified air blown out to the underfloor space 85 and the ceiling space 86 is changed.

  Further, the exhaust duct 10 and the cooling / heating duct 61 for communicating the main body 7 with the underfloor space 85 are connected between the inner wall of the house and the outer wall of the unit bath and connected to the underfloor space (85) in the vicinity of the bathroom. In the space (85), the underfloor space (85) in the vicinity of water-using equipment such as a bathroom or a washroom where moisture tends to stay is intensively ventilated and dehumidified.

  Further, a filter for detaching dust is detachably provided at a connection portion between the main body 7 and the exhaust ducts 10 and 12, and can be removed from the main body 7 for maintenance such as cleaning.

  In addition, temperature / humidity detection means 92 and 93 are disposed at the connection portion between the main body 7 and the exhaust ducts 10 and 12, and by detecting the temperature and humidity of the air sucked from the underfloor space 85 and the ceiling space 86, The necessity of ventilation and dehumidification of the underfloor space 85 and the ceiling space 86 is determined, and the operation is efficiently performed when the ventilation operation or the dehumidification operation is necessary.

  As mentioned above, the bathroom air conditioner of this embodiment has the following effects by the structure and operation described above.

  In the second heat exchanger (36), the living space A (1) discharged to the outside by the ventilation fan (13), for example, the living space B (2) which is a space other than the bathroom (4) and the bathroom (4), For example, the refrigerant absorbs heat from the air in the dressing room (5) and the toilet (6), and in the first heat exchanger (34), the circulation fan (23) causes the interior of the living space A (1), for example, the bathroom (4). Since the refrigerant radiates heat to the circulating air, the heat pump is operated to heat the bathroom (4), and the enthalpy of the air passing through the second heat exchanger (36) is higher than the outdoor air. As a result, the heating capacity can be increased or the second heat exchanger (36) can be downsized. In addition, the second heat exchanger (36) is cooled not in the outdoors but in the bathroom (4) by switching the passage switching mechanism (30) with the air cooled and condensed by the second heat exchanger (36). Since the air that has passed through and is cooled and dehumidified is blown out, it can be dehumidified by joining with the air heated by the first heat exchanger (34) without greatly increasing the temperature of the bathroom (4). The temperature and humidity can be optimized to dry the bathroom and clothes.

  Moreover, the compressor (33) which comprises a refrigerant circuit (32), the 1st heat exchanger (34), the expansion mechanism (35), 2nd heat | fever inside the ventilation air conditioner installed in the ceiling back of the bathroom (4), etc. By storing all the exchangers (36), a space for placing the outdoor unit outdoors becomes unnecessary, and it is not necessary to perform refrigerant piping work at the time of construction, thereby saving space and improving workability.

  Moreover, when the temperature of the bathroom (4) becomes high by flowing the air cooled by the second heat exchanger (36) to the upstream side of the air passage of the first heat exchanger (34), By reducing the pressure of the refrigerant in the first heat exchanger (34), the long-term reliability of the compressor (33) and the like can be improved, the temperature and humidity of the blown air are uniform, and unevenness in bathroom drying and clothes drying can be reduced.

  Further, by adjusting the amount of air blown out of the air exchanged by the second heat exchanger (36) to the outside and the bathroom (4) or upstream of the air passage of the first heat exchanger (34), the bathroom is adjusted. While adjusting the temperature of (4) to improve comfort, the air quality can also be improved by adjusting the ventilation air volume from the bathroom (4), the dressing room (5), and the toilet (6).

  Also, during ventilation operation from the bathroom (4), dressing room (5), and toilet (6), by bypassing the second heat exchanger (36), the internal resistance is reduced and the ventilation fan (13) is input. Can be reduced.

  Also, by closing the opening / closing device (26) during heating or bathing, ventilation from the bathroom (4) can be stopped while ventilation from the dressing room (5) and toilet (6) continues, The bathroom (4) can be efficiently air-conditioned without discharging the air that heated 4), and the draft feeling during bathing can be reduced.

  In addition, when the toilet (6) is ventilated, all the air sucked in by the ventilation fan (13) is discharged to the outside to prevent the transfer of odors from the toilet (6) to the bathroom (4) and dressing room (5) it can.

  In addition, the bathroom (4) is bathing and highly humid by closing the open / close devices (28, 29) of the dressing room (5) adjacent to the bathroom (4) during heating operation or ventilation operation other than the bathroom (4). Occasionally, by not letting the dressing room (5) to be a negative pressure, it is possible to prevent the transfer of humidity from the bathroom (4).

  In addition, an opening / closing device (26) is provided between the bathroom (4) and the ventilation fan (13) or the second heat exchanger (36), and the dressing room (5) adjacent to the bathroom (4) and the bathroom (4). When heating, dehumidifying, drying, and cooling operations are performed together, the opening and closing device (26) is closed and the dressing room is ventilated, thereby heating, dehumidifying, drying, and cooling blown into the bathroom (4). Air or the like flows through the gallery of the bathroom (4) to the adjacent and negative pressure undressing room (5), and the undressing room (5) can also be heated, dehumidified, dried, and cooled.

  Moreover, the dehumidification fan (53) which blows off the air which passes the 1st heat exchanger (34) to the bathroom (4) and the circulation fan (23) which blows the air which passes the 2nd heat exchanger (36) to the bathroom (4). The temperature and humidity of the air blown into the bathroom (4) can be controlled by the combination of operation of the circulation fan (23) and the dehumidifying fan (53), so that an optimum space can be obtained according to the purpose.

  In addition, a path switching mechanism (56) is provided for adjusting the amount of air blown out from the air heat exchanged by the second heat exchanger (36) to the outside and the dressing room (5), and heat is generated by the second heat exchanger (36). By using a part of the exchanged air to cool the dressing room (5) and exhausting a part to the outside, the dressing room (5) can be cooled while heating the bathroom (4).

  The first heat exchanger (34) and the second heat exchanger (36) are respectively provided with a circulation fan (23) and a dehumidifying fan (53), and the dehumidifying fan (53) is provided in the bathroom (4) or a dressing room ( In addition to being able to cool the dressing room (5) while heating the bathroom (4) by blowing out to 5) and communicating with the air path of the first heat exchanger (34), the bathroom (4) and the dressing room ( 5) can be heated at the same time.

  Moreover, the passage switching mechanism (62) which adjusts each air volume which blows off the air heat-exchanged with the 1st heat exchanger (34) or the 2nd heat exchanger (36) to a bathroom (4) and a dressing room (5) is provided. A part of the air heat-exchanged by the first heat exchanger (34) or the second heat exchanger (36) is used for heating or cooling the bathroom (4) or the dressing room (5). Thus, the bathroom (4) and the dressing room (5) can be optimally air-conditioned.

  In addition, a circulation fan (23) and a cooling / heating fan (65) for the first heat exchanger (34), a dehumidifying fan (53) and a ventilation fan (13) for the second heat exchanger (36) are provided, respectively. The bathroom (4), the dressing room (5), and the toilet (6) can be optimally air-conditioned by controlling (4), the dressing room (5), the toilet (6), the amount of blown air to the outside and the temperature and humidity.

  In addition, a flow path switching valve (37) for changing the flow direction of the refrigerant is provided, and the high-temperature and high-pressure refrigerant in the second heat exchanger (36) dissipates heat with room temperature room air in the bathroom (4) or the dressing room (5), Since the one heat exchanger (34) absorbs heat from the air in the bathroom more efficiently, the thermal efficiency of the cooling operation of the bathroom can be further improved.

  In addition, a decompression means (49) is provided in the pipe of the first heat exchanger (34), and heat is absorbed on the downstream side of the decompression means (49), and then heat is radiated on the upstream side to dehumidify the interior of the bathroom (4). By doing this, the bathroom (4) can be efficiently dehumidified without causing the air dehumidified by the first heat exchanger (34) to leak outside the bathroom (4).

  Moreover, when air-conditioning the inside of a bathroom (4), by increasing the air volume of a ventilation fan (13) with respect to ventilating indoor spaces other than the bathroom (4) which the inlet (9,11) opened. A sufficient air conditioning capability can be obtained by increasing the amount of heat absorbed or dissipated in the second heat exchanger (36).

  In addition, the conditioned air conditioned by the air conditioner (15) installed other than the bathroom (4) is sucked from the air inlets (9, 11) and supplied to the second heat exchanger (36), so that the bathroom (4 The thermal energy of the air conditioner (15) generated other than can be recovered to further improve the thermal efficiency.

  In addition, when the bathroom (4) is dried, the refrigerant also absorbs heat from the air in the bathroom (4) discharged outside through the ventilation passage (25) in the second heat exchanger (36). The heat radiated to the air in the bathroom (4) in the one heat exchanger (34) can also be recovered to improve the drying efficiency.

  In addition, by connecting the ventilation passage (25) to the interior of the bathroom (4) via the suction port (18), the suction portion of the ventilation passage (25) is shared with the suction port (18) and the number of dust removal filters Can be reduced.

  In addition, heating of at least part of the air blown by the circulation fan (23) by the auxiliary heater (24) can compensate for a lack of heating capacity in a low-temperature environment.

  Moreover, by radiating the radiant heat of the auxiliary heater (24) into the bathroom (4), the draft feeling at the time of bathing can be reduced and the comfort can be improved.

  In addition, by preheating the air before being supplied to the second heat exchanger (36) by the preheater heater (50), a reduction in heating capacity in a low temperature environment and frost formation on the second heat exchanger (36) are prevented. It can be suppressed and the attached frost can be removed.

  Moreover, when frost adheres to the first heat exchanger (34) or the second heat exchanger (36) at a low temperature, the attached frost is removed by switching the flow path switching valve (37) based on the refrigerant temperature. It can be performed.

  Further, when frost adheres to the second heat exchanger (36) at a low temperature, the high pressure side and the low pressure side of the refrigerant circuit (32) are opened through the bypass circuits (42, 43), and the high temperature refrigerant is exchanged with the second heat. The adhering frost can be removed by circulating in the vessel (36) or increasing the refrigerant pressure in the second heat exchanger (36).

  Further, the refrigerant heating means (46) is interposed in the refrigerant circuit (32) so as to be in series or in parallel with the second heat exchanger (36), and heat absorption such as frost adheres to the second heat exchanger (36). When the capacity is lowered, by operating the refrigerant heating means (46), the heat absorption capacity can be secured and the heating capacity can be maintained.

  In addition, the refrigerant heating means (46) can be downsized by using a refrigerant heater (67) that heats the refrigerant by electric heat as the refrigerant heating means (46).

  Further, by using a refrigerant-water heat exchanger (74) that heats the refrigerant by exchanging heat with hot water for the refrigerant heating means (46), the amount of electric power used in the refrigerant heating means (46) is reduced. Can do.

  Moreover, the electric power consumption of a refrigerant | coolant heating means (46) can further be reduced by using the hot water boiled with the heat pump type hot water heater for the hot water supplied to a refrigerant | coolant-water heat exchanger (74).

  Further, when the hot water after the heat exchange with the refrigerant in the refrigerant-water heat exchanger (74) is drained, dew condensation generated in the first heat exchanger (34) or the second heat exchanger (36). By using a drainage path for draining water, the construction can be simplified without increasing the number of drainage paths.

  In addition, when the heat radiation capability is insufficient at high temperatures such as in summer, the refrigerant is radiated to room temperature water supplied to the refrigerant-water heat exchanger (74), thereby eliminating the heat radiation and cooling. Ability can be maintained.

  Moreover, the waste_water | drain which drains the hot water after heat-exchange with a refrigerant | coolant with a refrigerant | coolant-water heat exchanger (74), and the dew condensation water produced in the 1st heat exchanger (34) or the 2nd heat exchanger (36). By providing the drain pump (40, 41) in the path, a higher drainage height can be maintained, and the wastewater can be reused and the drainage can be re-evaporated to save construction and save energy.

  In addition, by making the compressor (33) variable in drive frequency and making the drive frequency equal to or less than during heating operation during dehumidifying operation, temperature rise in the bathroom (4) can be suppressed, and power consumption can be further reduced. Can do.

  The expansion mechanism (35) is an electronically controlled expansion valve, and corresponds to the operation mode, the drive frequency of the compressor (33), the room temperature, the rotational speed of the circulation fan (23), the rotational speed of the ventilation fan (13), etc. By controlling the power consumption, it is possible to further reduce the amount of power used while making the temperature and humidity in the bathroom (4) comfortable.

  In addition, by connecting either or both of the exhaust duct (10) and the exhaust duct (12) to the underfloor space (85) and the ceiling back space (86) which are non-residential spaces, the underfloor space (85) and the ceiling By sucking air from the back space (86) and exhausting it to the outside, the underfloor space (85) and the ceiling back space (86) can be ventilated.

  Moreover, the underfloor space (85) can be dehumidified by supplying the dehumidified air to the underfloor space (85) by communicating the cooling / heating duct (61) with the underfloor space (85).

  Further, by connecting the cooling / heating duct (61) to the ceiling back space (86) and supplying the dehumidified air to the ceiling back space (86), the ceiling back space (86) can be dehumidified. .

  In addition, a passage switching mechanism (89) for adjusting the amount of air blown from the cooling / heating duct (61) to the underfloor space (85) and the ceiling space (86) is provided, and a part of the dehumidified air is supplied to the underfloor space (85). However, by supplying a part to the ceiling space (86), the underfloor space (85) and the ceiling space (86) can be dehumidified simultaneously.

  Further, a cooling / heating duct (61) or an exhaust duct (10) routed from the main body (7) to the underfloor space (85) is passed between the inner wall of the residence and the outer wall of the unit bath, and connected to the underfloor space (85) near the bathroom. This makes it possible to intensively ventilate or dehumidify the underfloor space (85) in the vicinity of water-using equipment such as a bathroom or a washroom where moisture is likely to stay in the underfloor space (85) of the house.

  Further, the temperature / humidity detecting means (92, 93) disposed at the connection portion between the main body (7) and the exhaust ducts (10, 12), for example, a space to which the exhaust ducts (10, 12) are connected, for example, an underfloor space ( 85) and the temperature and humidity conditions of the ceiling space (86) are detected, and the drive frequency of the compressor (33), the expansion mechanism (35), the rotational speed of the circulation fan (23), and ventilation corresponding to the detected temperature and humidity. By controlling the rotational speed of the fan (13), the operation can be efficiently performed when the dehumidifying operation is required.

  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 above-described embodiment, the indoor space to be air-conditioned is the bathroom 4, and the indoor space having the intake port opened is the dressing room 5 and the toilet 6, but the air-conditioned space and the space opening the intake port are in the living space. Any partitioned space may be used, and the present invention is not limited to the above. That is, the air-conditioned space may be set in the living room, and the space that opens the intake port may be set in the bathroom.

  Moreover, in the said embodiment, although the structure which opens an inlet in two places, the dressing room 5 and the toilet 6, was shown, the opening position and number of exhaust outlets are not limited to this. For example, it is good also as a structure which opens an inlet in only one toilet.

  Moreover, in the said embodiment, although the installation position was set as the ceiling back and the main body was concealed, the installation position is not limited to the ceiling back, and other forms such as a wall-mounted type and a floor-standing type may be used.

  Moreover, in the said embodiment, although the inlet ports 9 and 11 and the blower outlets 19, 51, and 57 of the main body 7 are opening to different living spaces, it is not limited to the above. That is, the main body 7 and the air inlets 9 and 11 may be installed in the same living space, and air may be sucked from a certain portion in the living space and blown from a certain portion. The same applies to the air blowing from the cooling / heating ducts 55, 61, 63 to the living room.

  Moreover, in the said embodiment, although the water receiving tray 38 and the drain pump 40 were provided below the 1st heat exchanger 34, the water receiving tray 39 and the drain pump 41 were provided below the 2nd heat exchanger 36, although the structure was shown. As long as the water tray can receive drain water discharged from the heat exchanger, the installation position and number are not limited to this. For example, it is good also as a structure which makes the water receiving tray of the 1st heat exchanger 34 and the 2nd heat exchanger 36 one place, and makes a drain pump one place in connection with it.

  In the above embodiment, the driving method of the compressor 33 is not mentioned, but the driving method of the compressor 33 may be a constant driving frequency or a variable driving frequency.

  Moreover, in the said embodiment, although the structure which provided the bypass circuit 42 of the bypass circuit 42 and the bypass circuit 43 in the refrigerant circuit 32 was shown, a bypass circuit is good also as only one system.

  Moreover, in the said embodiment, although the structure which provides the refrigerant | coolant heating means 46 in parallel with the 2nd heat exchanger 36 was shown, as a structure which interposes in the serial state with the 2nd heat exchanger 36 in the refrigerant circuit 32, it is also possible. good.

  In the above embodiment, the on / off valve 44 and the on / off valve 45 are switched in two stages of opening and closing. However, the on / off valve may be an electronic expansion valve or the like as long as it can open and close the bypass circuit. May be used.

  In the above embodiment, the on-off valve 47 and the capillary tube 48 are provided in parallel as the decompression means 49. However, the decompression means 49 may be any one that can switch the decompression action, and an electronic expansion valve. It is good also as a structure which interposes.

  In the above embodiment, the refrigerant heating unit 46 has two types of configurations, ie, the refrigerant heater 67 and the refrigerant-water heat exchanger 74. However, the refrigerant heating unit 46 can heat the refrigerant. However, the present invention is not limited to the above two types.

  Moreover, in the said embodiment, although the structure which supplies the hot_water | molten_metal supply water from the heat pump water heater 75 to the water side piping of the refrigerant | coolant-water heat exchanger 74 was shown, As long as it supplies hot water (for example, 40 ° C. to 90 ° C.) or normal temperature water supply (for example, 1 ° C. to 40 ° C.), it is not limited to a heat pump water heater. For example, it is good also as a structure which circulates the hot water supply of a gas water heater, an electric water heater, the hot water supply of an oil water heater, water supply, circulating water, or city water, or the hot water of a bathtub.

  As described above, the ventilation air conditioner according to the present invention can save space and improve workability, and can improve the thermal efficiency by reducing leakage of air-conditioned air. The present invention can be applied not only to ventilation air conditioning but also to ventilation air conditioning devices such as living rooms, bedrooms, kitchens, washrooms, under floors, and ceilings.

The sketch of the living space where the ventilation air-conditioning apparatus concerning Embodiment 1 of this invention is installed Airway configuration diagram and refrigerant circuit diagram of the ventilation air conditioner Airway block diagram and refrigerant circuit diagram of ventilation air conditioner according to Embodiment 2 of the present invention Airway block diagram and refrigerant circuit diagram of ventilation air conditioner according to Embodiment 3 of the present invention Airway block diagram and refrigerant circuit diagram of ventilation air conditioner according to Embodiment 4 of the present invention Schematic configuration diagram of refrigerant heater that can be used as refrigerant heating means of the ventilation air conditioner Schematic sectional view of a refrigerant-water heat exchanger that can be used as a refrigerant heating means of the ventilation air conditioner Schematic installation of the ventilation air conditioner according to Embodiment 5 of the present invention

Explanation of symbols

1 Living space A
2 living space B
3 Living 4 Bathroom 5 Dressing room 6 Toilet 7 Body 8 Exhaust duct 9 Intake port 10 Exhaust duct 11 Intake port 12 Exhaust duct 13 Ventilation fan 14 Intake port 15 Air conditioner 16 Door 17 Door 18 Suction port 19 Outlet 20 Filter 21 Temperature and humidity Detection device 22 Circulation passage 23 Circulation fan 24 Auxiliary heater 25 Ventilation passage 26 Opening and closing device 27 Opening and closing device 28 Opening and closing device 29 Opening and closing device 30 Passage switching mechanism 31 Dehumidifying passage 32 Refrigerant circuit 33 Compressor 34 First heat exchanger 35 Expansion mechanism 36 First Two heat exchangers 37 Channel switching valve 38 Water tray 39 Water tray 40 Drain pump 41 Drain pump 42 Bypass circuit 43 Bypass circuit 44 On-off valve 45 On-off valve 46 Refrigerant heating means 47 On-off valve 48 Capillary tube 49 Depressurization means 50 Preheating heater 51 Outlet 2 Dehumidifying passage 53 Dehumidifying fan 54 Opening / closing device 55 Cooling / heating duct 56 Passage switching mechanism 57 Air outlet 58 Dehumidifying passage 59 Opening / closing device 60 Opening / closing device 61 Cooling / heating duct 62 Passage switching mechanism 63 Cooling / heating duct 64 Cooling / heating passage 65 Cooling / heating fan 66 Opening / closing device 67 Refrigerant heating Heater 74 Refrigerant-water heat exchanger 85 Underfloor space 86 Ceiling back space 87 Air inlet 88 Air outlet 89 Passage switching mechanism 90 Filter 91 Filter 92 Temperature / humidity detection means 93 Temperature / humidity detection means

Claims (39)

A circulation fan that sucks air from a suction port that opens into the living space A and blows out air from a blowout port that opens into the living space A; a living space separate from the suction port that opens into the living space A and the living space A A ventilation fan that sucks air from the suction opening opened in B and blows it out to the living space A or outdoors, a compressor that compresses the refrigerant, and a first heat exchanger that exchanges heat between the air blown by the circulation fan and the refrigerant An expansion mechanism that expands the refrigerant, a second heat exchanger that exchanges heat between the air blown by the ventilation fan and the refrigerant, the compressor, the first heat exchanger, the expansion mechanism, and the second heat and a refrigerant circuit the refrigerant in the order was piping to circulate the exchanger, cut so that blown to either outdoor and the living space a air has exchanged heat with the second heat exchanger by the ventilation fan Characterized in that it comprises the obtaining the passage change-over mechanism, ventilating air-conditioning system. The passage switching mechanism blows out the air heat-exchanged by the second heat exchanger to either the outdoor side or the upstream side of the air passage of the first heat exchanger, and is sucked from the living space A in the first heat exchanger. The refrigerant radiates heat only to the air, or the refrigerant radiates heat to the air merged with the air sucked from the living space A and the air heat-exchanged by the second heat exchanger. Ventilation air conditioner. A passage switching mechanism that adjusts the amount of air blown out from the outdoor space and the living space A or the upstream side of the air passage of the first heat exchanger, respectively, with heat exchanged by the second heat exchanger; The ventilation air conditioner according to claim 1 or 2, wherein a part of the exchanged air is used for cooling the living space A, and a part thereof is exhausted outdoors. The ventilation air conditioner according to claim 1, 2 or 3, further comprising an opening / closing device for bypassing the air in the living space A and the living space B to bypass the second heat exchanger, and discharging directly to the outdoors during the ventilation operation. . The opening and closing device is provided between the suction port of the living space A and the ventilation fan or the second heat exchanger, and the opening and closing device is closed during heating operation or bathing. 3. A ventilation air conditioner according to 3 or 4. The ventilation air conditioner according to claim 1, 2, 3, 4, or 5, wherein a passage switching mechanism is operated so as to exhaust all the air in the living space B to the outside in accordance with a ventilation operation signal of the living space B. . An opening / closing device is provided between the suction port of the living space B and the ventilation fan or the second heat exchanger, and the opening / closing device of the living space B adjacent to the living space A during heating operation or ventilation operation other than the living space A The ventilation air conditioner according to claim 1, wherein the ventilation air conditioner is closed. An opening / closing device is provided between the suction port of the living space A and the ventilation fan or the second heat exchanger, and in the living space B adjacent to the living space A, the opening / closing device is closed to ventilate the living space B. Accordingly, the air-conditioning apparatus according to claim 1, 2, 3, 4, 5, 6, or 7, wherein the air conditioned in the living space A flows into the living space B. Air is sucked in from the air inlet opening in the living space A, and then passes through the circulation fan and the second heat exchanger that blows out air that has exchanged heat with the refrigerant passing through the first heat exchanger from the air outlet opening in the living space A. The dehumidifying fan which blows off the air heat-exchanged with the refrigerant | coolant is provided, The living space A is air-conditioned by the driving | operation combination of the said circulation fan and the said dehumidifying fan, The 1, 2, 3, 4, 5, 6 characterized by the above-mentioned. 7. A ventilation air conditioner according to claim 7 or 8. A passage switching mechanism that adjusts the amount of air that blows out the air heat-exchanged by the second heat exchanger to the outside and the living space B is provided, and a part of the air heat-exchanged by the second heat exchanger is moved to the living space B. The ventilation air conditioner according to claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, wherein the ventilation air conditioner is used for cooling, and a part thereof is exhausted outdoors. A circulation fan that sucks air from a suction port opened in the living space A, and blows out air that has exchanged heat with the refrigerant passing through the first heat exchanger, and the living space A and the living space B from the air outlet opened in the living space A A dehumidifying fan that sucks air from a suction opening that is opened in the air and blows out air that has been heat-exchanged with the refrigerant that passes through the second heat exchanger from the air outlet that opens in the living space A or the cooling and heating duct that communicates with the living space B The dehumidifying fan is in communication with an air passage passing through the first heat exchanger, and the living space A and the living space B are air-conditioned by an operating combination of the circulation fan and the dehumidifying fan. 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10. A passage switching mechanism that adjusts the amount of air blown out to the living space A and the living space B from the air heat-exchanged by the first heat exchanger or the second heat exchanger, and the first heat exchanger or the second heat exchanger; characterized by distributing the air that has been heat exchanged in the living space a or residents space B, according to claim 7, 8, 9, 10 or 11, wherein Ventilation air conditioner. Cooling / heating connected to the living space B and a circulation fan that sucks air from the suction port opened to the living space A and blows out air that has exchanged heat with the refrigerant passing through the first heat exchanger from the air outlet opened to the living space A A cooling / heating fan that blows out to the duct is provided, air is sucked in from the air inlets that are opened in the living space A and the living space B, and heat is exchanged with the refrigerant that passes through the second heat exchanger from the air outlet that is opened in the living space A. A dehumidifying fan that blows out the air and a ventilation fan that blows out to a cooling / heating duct communicating with the outdoor space or the living space B. By combining the operation of the circulation fan, the cooling / heating fan, the dehumidifying fan, and the ventilation fan, The ventilation air conditioner according to claim 1, 2, 3, 4, 5, 6, 7, or 8, wherein the living space B is air-conditioned. A flow switching valve that switches the flow direction of the refrigerant in the order of a compressor, a second heat exchanger, an expansion mechanism, and a first heat exchanger, and that is exhausted to the outside by the ventilation fan in the second heat exchanger The refrigerant radiates heat to the first heat exchanger, and the living space A is cooled by absorbing heat from the air circulating in the living space A by the circulation fan in the first heat exchanger. The ventilation air conditioner according to 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, or 13. A pressure reducing means for decompressing the refrigerant is provided in a pipe through which the refrigerant of the first heat exchanger flows, and after the refrigerant on the downstream side of the pressure reducing means absorbs heat from the air blown by the circulation fan, 15. The living space A is dehumidified by radiating heat from the refrigerant, according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14. Ventilation air conditioner. When the living space A is heated, cooled, dehumidified and dried for air conditioning, the air volume of the ventilation fan is increased compared to the case where the ventilation space is opened by operating only the ventilation fan. The ventilation air conditioner according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15. The air sucked into the suction port is conditioned air that has been air-conditioned by an air conditioner installed outside the living space A. The ventilation air conditioner according to 9, 10, 11, 12, 13, 14, 15 or 16. The refrigerant absorbs heat in the second heat exchanger from the air in the living space A that is discharged to the outside through the ventilation passage when the living space A is dried. The ventilation air conditioner according to 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 or 17. The ventilation passage is communicated with the interior of the living space A through a suction port, characterized in that the ventilation passage is connected to the interior of the living space A. The ventilation air conditioner according to 14, 15, 16, 17, or 18. The auxiliary heater which heats at least one part of the air which a circulation fan ventilates is further provided, The 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 characterized by the above-mentioned. , 13, 14, 15, 16, 17, 18, or 19. The auxiliary heater is a radiant heater that dissipates radiant heat in the bathroom, characterized in that: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, The ventilation air conditioner according to 14, 15, 16, 17, 18, 19 or 20. A preheating heater for preheating the air before being supplied to the second heat exchanger by the ventilation fan is further provided. The ventilation air conditioner according to 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 or 21. The flow path switching valve is switched based on the refrigerant temperature of the first heat exchanger or the second heat exchanger, characterized in that the flow path switching valve is switched. , 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 or 22. A bypass circuit that branches from a refrigerant circuit that extends from the discharge side of the compressor to the expansion mechanism and merges with a refrigerant circuit that extends from the expansion mechanism to the suction side of the compressor; and an on-off valve that opens and closes the bypass circuit. Claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, The ventilation air conditioner according to 22 or 23. Refrigerant heating means for heating the refrigerant is interposed in the refrigerant circuit so as to be in series or in parallel with the second heat exchanger. The ventilation air conditioner according to 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 or 24. The ventilation air conditioner according to claim 25, wherein the refrigerant heating means is a refrigerant heater that heats the refrigerant by electric heat. The ventilation air conditioner according to claim 25, wherein the refrigerant heating means is a refrigerant-water heat exchanger that heats the refrigerant by exchanging heat with hot water. 28. The ventilation air conditioner according to claim 27, wherein hot water boiled by a heat pump water heater is used as hot water supplied to the refrigerant-water heat exchanger. The hot water after heat exchange with the refrigerant in the refrigerant-water heat exchanger is drained to the outside of the apparatus through a drainage path for draining condensed water generated in the first heat exchanger or the second heat exchanger. The ventilation air conditioner according to claim 27 or 28, wherein 30. The ventilation air conditioner according to claim 27, 28 or 29, wherein normal temperature water is supplied to the refrigerant-water heat exchanger so that the refrigerant radiates heat in the refrigerant-water heat exchanger. A drain pump is provided in the drainage path for draining the hot water after the heat exchange with the refrigerant in the refrigerant-water heat exchanger and the dew condensation water generated in the first heat exchanger or the second heat exchanger. The ventilation air conditioner according to claim 29 or 30, wherein the ventilation air conditioner is configured to drain water. The compressor has a variable drive frequency, and the drive frequency during dehumidification operation is equal to or less than that during heating operation. 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 or 31. The ventilation mechanism according to claim 32, wherein the expansion mechanism is an electronically controlled expansion valve, and the expansion mechanism is controlled in accordance with an operation mode, a compressor drive frequency, a room temperature, a circulation fan rotation speed, and a ventilation fan rotation speed. Air conditioner. By connecting either or both of the exhaust duct and the exhaust duct to an underfloor space or a ceiling space that is a non-residential space, air is sucked from the underfloor space or the ceiling space and exhausted outdoors. The ventilation air conditioner according to claim 33. The ventilation air conditioner according to claim 34, wherein dehumidified air is supplied to the underfloor space by causing the cooling / heating duct to communicate with the underfloor space. The ventilation air conditioner according to claim 34, wherein the air that has been dehumidified is supplied to the ceiling space by communicating the cooling / heating duct with the ceiling space. It is equipped with a passage switching mechanism that adjusts the amount of air blown from the cooling / heating duct to the underfloor space and the ceiling space, supplying a part of the dehumidified air to the underfloor space, and supplying a part to the ceiling space, The ventilation air conditioner according to claim 35 or 36. 38. The ventilation air conditioner according to claim 37, wherein a cooling / heating duct or an exhaust duct routed from the main body to the underfloor space is connected between the inner wall of the house and the outer wall of the unit bath and connected to the underfloor space near the bathroom. Temperature / humidity detection means arranged at the connection between the main unit and the exhaust duct detects the temperature / humidity conditions of the space where the exhaust duct is connected, for example, the underfloor space or the ceiling space, and compresses according to the detected temperature / humidity 39. The ventilation air conditioner according to claim 38, which controls the drive frequency of the machine, the expansion mechanism, the rotational speed of the circulation fan, and the rotational speed of the ventilation fan.

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