JP6653431B1 - Heat exchange ventilator with dehumidification function - Google Patents

Abstract

Provided is a heat exchange type ventilator with a dehumidification function capable of blowing a supply air flow in which a rise in temperature caused by dehumidification is suppressed. A heat exchange ventilator with a dehumidifying function includes a heat exchange ventilator for exchanging heat between an exhaust stream flowing through an exhaust path and a supply stream flowing through a supply path. And a dehumidifier 30 for dehumidifying the supply air flow 3. The dehumidifier 30 includes a refrigeration cycle including a compressor 31, a radiator 32, an expander 33, and a heat absorber 34, a heat exchanger 35 for exchanging heat between air flowing inside, and water condensed by dehumidification (condensation water). ) To the radiator 32. The dehumidified supply air flow 3 flows through the second region 32b of the radiator 32 cooled by the water (condensed water) introduced from the water introduction unit 38, and is led out to the supply air passage 5, while being dehumidified by the dehumidifier 30. The exhaust gas 2 introduced into the first air passage flows through the first region 32a cooled by the water introduced from the water introduction unit 38 via the second region 32b, and is led out to the exhaust air passage 4. [Selection diagram] FIG.

Description

  The present invention relates to a heat exchange type ventilator with a dehumidifying function used for a living space or the like.

  2. Description of the Related Art Conventionally, as a device capable of ventilation without impairing the effect of cooling or heating, a heat exchange ventilator that exchanges heat between a supply air flow and an exhaust air flow during ventilation is known.

  In recent years, due to the effects of global warming and improved airtightness of houses, indoor exhaust heat and moisture are insufficient, particularly in summer, and indoors become hot and humid, which impairs indoor comfort for residents. It is feared that it will be. In order to improve indoor comfort in summer, it is particularly important to reduce indoor humidity. Therefore, a heat exchange ventilator with a dehumidifying function for performing heat exchange ventilation while adjusting indoor humidity is required. For this reason, we are developing a heat exchange ventilator using a dehumidifier that combines a refrigeration cycle and a heat exchanger as a heat exchange ventilator with a dehumidifying function. As a dehumidifier combining a refrigeration cycle and a heat exchanger, for example, a dehumidifier described in Patent Document 1 is known.

  A conventional dehumidifier will be described with reference to FIG.

  As shown in FIG. 5, the conventional dehumidifier 100 is configured such that the air (air X, air Y) sucked into the main body case 102 from the air inlet 101 passes through the dehumidifier 103, and then passes through the air outlet 104. It is configured to blow out the main body case 102. The dehumidifying unit 103 is disposed between the compressor 105, the radiator 106, the expander 107, and the heat absorber 108 in this order, and between the heat absorber 108 and the heat radiator 106. And a heat exchanger 111 for exchanging heat between the air and the air Y flowing through the second flow path 110.

  Then, the air X flowing through the first flow path 109 is cooled by the heat absorber 108 and dew condensation occurs. The dew water generated by the occurrence of the dew is collected. On the other hand, the air Y flowing through the second flow path 110 exchanges heat with the air X cooled by the heat absorber 108 and is cooled to cause dew condensation. The dew water generated by the occurrence of the dew is also collected. Thereby, in the conventional dehumidifier 100, high dehumidification performance is secured.

International Publication No. WO 2016/031139

  However, the conventional dehumidifier 100 is configured to pass dehumidified air through the radiator 106 in order to cool the radiator 106 of the refrigeration cycle. In the radiator 106, in addition to the energy absorbed by the heat absorber 108, the energy for circulating the refrigerant in the refrigeration cycle is exhausted by the compressor 105, so that the temperature of the dehumidified air passing through the radiator 106 Will rise above the temperature of the air before dehumidification. As a result, when the dehumidifying mechanism of the conventional dehumidifying device 100 is disposed in the air supply passage of the heat exchange type ventilator to perform dehumidification, the air after dehumidification (air with increased temperature) is directly blown into the room as an air supply flow. This causes a problem that the indoor comfort is impaired.

  The present invention has been made to solve the above-described problem, and provides a heat exchange type ventilator with a dehumidifying function capable of blowing a supply air flow in which a rise in temperature caused by dehumidification is suppressed.

  In order to achieve this object, a heat exchange type ventilator with a dehumidifying function according to the present invention is configured to supply an exhaust air flowing through an exhaust air passage for discharging indoor air to the outside and an outdoor air to the room. A heat exchange type ventilator for exchanging heat with a supply airflow flowing through a supply airflow path for air supply, and a dehumidifier for dehumidifying the supply airflow. The dehumidifying device is disposed between the refrigeration cycle including a compressor, a radiator, an expander, and a heat absorber, and disposed between the heat absorber and the radiator, and is configured to air and flow through the first flow path. The heat exchanger includes a heat exchanger that exchanges heat with flowing air, and a water introduction unit that introduces water condensed in at least the heat absorber into the radiator. The dehumidifier is configured such that the supply air flow after heat exchange is introduced from the supply air passage and the exhaust flow is introduced from the exhaust air passage. A part of the supply airflow introduced into the dehumidifier is circulated in the order of the heat absorber and the first flow path of the heat exchanger and is led out to the supply airflow path, and the other part of the supply airflow introduced into the dehumidifier is subjected to heat exchange. It flows through the second flow path of the vessel and is led to the supply air passage. The radiator is cooled by water introduced from the water introduction unit. The exhaust gas introduced into the dehumidifier flows through a radiator cooled by the water introduced from the water introduction unit, and is led to the exhaust air passage.

  ADVANTAGE OF THE INVENTION According to this invention, the heat exchange type ventilation apparatus with a dehumidification function which can send the supply airflow which suppressed the temperature rise which arises with dehumidification can be provided.

FIG. 1 is a schematic diagram showing an installation state in a house of a heat exchange ventilator according to a premise of the present invention. FIG. 2 is a schematic diagram illustrating a configuration of a heat exchange ventilator according to a premise of the present invention. FIG. 3 is a schematic diagram illustrating a configuration of a heat exchange type ventilator with a dehumidifying function according to Embodiment 1 of the present invention. FIG. 4 is a schematic diagram showing a configuration of a heat exchange type ventilator with a dehumidifying function according to Embodiment 2 of the present invention. FIG. 5 is a schematic sectional view showing a configuration of a conventional dehumidifying device.

  The heat exchange ventilator with a dehumidifying function according to the present invention has an exhaust flow that circulates through an exhaust air path for discharging indoor air to the outside and a supply air path that supplies outdoor air to the room. A heat exchange type ventilator for exchanging heat with the supplied air flow, and a dehumidifier for dehumidifying the supplied air flow. The dehumidifying device is disposed between the refrigeration cycle including a compressor, a radiator, an expander, and a heat absorber, and disposed between the heat absorber and the radiator, and is configured to air and flow through the first flow path. The heat exchanger includes a heat exchanger that exchanges heat with flowing air, and a water introduction unit that introduces water condensed in at least the heat absorber into the radiator. The dehumidifier is configured such that the supply air flow after heat exchange is introduced from the supply air passage and the exhaust flow is introduced from the exhaust air passage. A part of the supply airflow introduced into the dehumidifier is circulated in the order of the heat absorber and the first flow path of the heat exchanger, and is led out to the supply airflow path. It flows through the second flow path of the vessel and is led to the supply air passage. The radiator is cooled by water introduced from the water introduction unit. The exhaust gas introduced into the dehumidifier flows through a radiator cooled by the water introduced from the water introduction unit, and is led to the exhaust air passage.

  According to such a configuration, energy required for cooling (exhausting heat) of the radiator in the dehumidifier is converted into sensible heat or vaporization heat of water introduced into the radiator from the water inlet and exhaust air from the heat exchange ventilator. Air (exhaust flow having a lower temperature than the supply air flow in summer when dehumidification is required), and the air radiator can be cooled effectively, and the air after dehumidification (air supply flow) Temperature rise can be suppressed. As a result, even when a dehumidifier combining a refrigeration cycle and a heat exchanger is applied, it is possible to blow a supply air flow in which a rise in temperature caused by dehumidification is suppressed. That is, it is possible to provide a heat exchange type ventilator with a dehumidifying function capable of blowing a supply air flow in which a rise in temperature caused by dehumidification is suppressed.

  In the heat exchange ventilator with a dehumidifying function of the present invention, the radiator is disposed in the exhaust air passage and the first region through which the exhaust air flows, and is connected to the first region and disposed in the supply air passage. And a second region through which the supply air flows. Then, the supply air flow dehumidified by the dehumidifier flows through the second region of the radiator cooled by the water introduced from the water introduction unit, is led out to the supply air passage, and the exhaust flow introduced into the dehumidifier is Then, the water flows from the first region cooled by the water introduced from the water introducing portion through the second region, and is guided to the exhaust air passage.

  According to such a configuration, since the water introduced from the water inlet directly cools the second area of the radiator through which the dehumidified air (air supply flow) flows, it is possible to reliably suppress the temperature rise of the air supply flow. Can be.

  Further, in the heat exchange type ventilator with the dehumidifying function of the present invention, the radiator is disposed in the exhaust air passage so that the exhaust gas flows. Then, the supply air flow derived from the dehumidifier to the supply air passage is derived to the supply air passage without flowing through the radiator, and the exhaust flow introduced to the dehumidifier is cooled by water introduced from the water introduction part. Through the radiator that is provided and is led to the exhaust air path.

  According to such a configuration, the dehumidified air (air supply flow) is blown into the room without flowing through the radiator, so that a rise in temperature caused by dehumidification can be reliably suppressed.

  Further, in the heat exchange ventilator with a dehumidifying function of the present invention, the water introduction unit is configured to collect water condensed in the heat absorber and water condensed in the heat exchange unit and introduce the collected water into the radiator. ing.

  According to such a configuration, the amount of water introduced into the radiator can be further increased, so that the radiator can be stably cooled.

  In the heat exchange ventilator with the dehumidifying function of the present invention, the temperature of the supply air supplied from the dehumidifier to the room controls the ratio of the air flow of a part of the air supply to the air flow of the other part of the air supply. Adjusted by.

  According to such a configuration, the temperature of the other portion of the supply airflow flowing through the second flow passage can be further reduced by the airflow cooled by the heat absorber (part of the supply airflow flowing through the first flow passage). The temperature of the supply air supplied to the room can be easily adjusted to a desired temperature.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. In all the drawings, the same portions are denoted by the same reference numerals, and description thereof is omitted. Further, details of each part which is not directly related to the present invention are omitted in each drawing in order to avoid duplication.

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

(Premise example)
First, a heat exchange type ventilator as a premise of an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing an installation state in a house of a heat exchange ventilator according to a premise of the present invention. FIG. 2 is a schematic diagram illustrating a configuration of a heat exchange ventilator according to a premise of the present invention.

  In FIG. 1, a heat exchange type ventilation device 10 is installed inside a house 1. The heat exchange type ventilation device 10 is a device that ventilates while exchanging heat between indoor air and outdoor air.

  As shown in FIG. 1, the exhaust stream 2 is discharged outside through a heat exchange type ventilation device 10 as indicated by a black arrow. The exhaust flow 2 is a flow of air discharged from indoors to outdoors. The supply air flow 3 is introduced into the room through the heat exchange type ventilation device 10 as indicated by the white arrow. The supply air flow 3 is a flow of air taken in from indoors to outdoors. For example, in winter in Japan, the exhaust stream 2 may be at 20 to 25 ° C., while the supply stream 3 may be below freezing. The heat exchange type ventilator 10 performs ventilation and transmits heat of the exhaust flow 2 to the supply air flow 3 at the time of the ventilation, thereby suppressing unnecessary heat release.

  As shown in FIG. 2, the heat exchange ventilator 10 includes a main body case 11, a heat exchange element 12, an exhaust fan 13, an inside air port 14, an exhaust port 15, an air supply fan 16, an outside air port 17, an air supply port 18, and an exhaust port. An air path 4 and an air supply path 5 are provided. The main body case 11 is an outer frame of the heat exchange type ventilation device 10. On the outer periphery of the main body case 11, an inside air port 14, an exhaust port 15, an outside air port 17, and an air supply port 18 are formed. The inside air port 14 is a suction port that sucks the exhaust gas flow 2 into the heat exchange type ventilator 10. The exhaust port 15 is an outlet that discharges the exhaust stream 2 from the heat exchange ventilator 10 to the outside. The outside air port 17 is a suction port that sucks the supply air flow 3 into the heat exchange ventilator 10. The air supply port 18 is a discharge port that discharges the air supply flow 3 from the heat exchange ventilator 10 to the room.

  Inside the body case 11, a heat exchange element 12, an exhaust fan 13, and an air supply fan 16 are mounted. An exhaust air passage 4 and an air supply air passage 5 are formed inside the main body case 11. The heat exchange element 12 is a member for performing heat exchange (sensible heat and latent heat) between the exhaust airflow 2 flowing through the exhaust airflow path 4 and the supply airflow 3 flowing through the air supply airflow path 5. The exhaust fan 13 is installed near the exhaust port 15, and is a blower for sucking the exhaust stream 2 from the inside air port 14 and discharging the exhaust stream 2 from the exhaust port 15. The air supply fan 16 is installed near the air supply port 18, and is a blower for sucking the air supply flow 3 from the external air port 17 and discharging it from the air supply port 18. The exhaust air path 4 is an air path that connects the inside air port 14 and the exhaust port 15. The air supply path 5 is an air path that connects the outside air port 17 and the air supply port 18. The exhaust flow 2 sucked by the exhaust fan 13 passes through the heat exchange element 12 in the exhaust air passage 4 and the exhaust fan 13 and is discharged from the exhaust port 15 to the outside. The air supply flow 3 sucked by the air supply fan 16 is supplied to the room from the air supply port 18 via the heat exchange element 12 and the air supply fan 16 in the air supply air passage 5.

  When performing heat exchange ventilation, the heat exchange type ventilator 10 operates the exhaust fan 13 and the air supply fan 16 of the heat exchange element 12, and the exhaust flow 2 flowing through the exhaust air passage 4 in the heat exchange element 12. In addition, heat exchange is performed with the supply air flow 3 flowing through the supply air passage 5. Thus, when performing ventilation, the heat exchange type ventilator 10 transmits the heat of the exhaust stream 2 released outside to the supply air stream 3 that takes in the room, suppresses unnecessary release of heat, and reduces the heat inside the room. Collect. As a result, in the winter season, when ventilation is performed, the indoor temperature can be prevented from lowering by the air having a low outdoor temperature. On the other hand, in the summer season, when performing ventilation, the indoor temperature rise can be suppressed by air having a high outdoor temperature.

(Embodiment 1)
Next, a heat exchange type ventilator with a dehumidifying function according to the first embodiment will be described with reference to FIG. FIG. 3 is a schematic diagram illustrating a configuration of a heat exchange type ventilator with a dehumidifying function according to Embodiment 1 of the present invention. In each of the schematic diagrams after FIG. 3, the exhaust air path 4 and the supply air path 5 are represented as the exhaust flow 2 and the supply air flow 3 (black arrows) in the heat exchange ventilator 10. I have.

  As shown in FIG. 3, the heat exchange ventilator 50 with a dehumidifying function according to the first embodiment includes a dehumidifier 30 as a means for providing a dehumidifying function to the heat exchange ventilator 10 according to the premise. Are connected.

  The dehumidifier 30 is a unit for dehumidifying the supply airflow 3 after heat exchange in the heat exchange ventilator 10. The dehumidifier 30 includes a refrigeration cycle including a compressor 31, a radiator 32, an expander 33, and a heat absorber 34, a heat exchanger 35, and a water introduction unit 38. The refrigeration cycle of the present embodiment is configured by annularly connecting the compressor 31, the radiator 32, the expander 33, and the heat absorber 34 in this order. In the refrigeration cycle, for example, an alternative chlorofluorocarbon (HFC134a) is used as a refrigerant. In addition, a copper tube is often used for connecting the components constituting the refrigeration cycle, and is connected by a welding method.

  The compressor 31 is a device that compresses a low-temperature and low-pressure refrigerant gas (working medium gas) in a refrigeration cycle and increases the pressure to increase the temperature. In the present embodiment, the compressor 31 raises the temperature of the refrigerant gas to about 45 ° C.

  The radiator 32 is a device that releases heat to the outside (outside the refrigeration cycle) by exchanging heat between the refrigerant gas and the air (exhaust flow 2), which have become high temperature and high pressure by the compressor 31. At this time, the refrigerant gas is condensed and liquefied under high pressure. In the radiator 32, the temperature of the introduced refrigerant gas (about 45 ° C.) is higher than the temperature of the air. Therefore, when heat is exchanged, the temperature of the air is raised and the refrigerant gas is cooled. The radiator 32 is also called a condenser.

  Further, the radiator 32 is disposed to extend below a water introduction part 38 described later. The radiator 32 is divided into a first region 32a disposed in the exhaust air passage 4 and through which the exhaust flow 2 flows, and a second region 32b disposed in the supply air passage 5 and through which the supply air flow 3 flows. Is done. The first region 32a and the second region 32b are partitioned so that the air (exhaust flow 2 and supply air flow 3) flowing in the respective regions is not mixed, but is configured to be thermally connected. That is, if the first region 32a is cooled, the second region 32b is also cooled in conjunction with it, while if the second region 32b is cooled, the first region 32a is also cooled in conjunction with it.

  The expander 33 is a device that decompresses the high-pressure refrigerant liquefied by the radiator 32 to obtain the original low-temperature, low-pressure liquid. The expander 33 is also called an expansion valve.

  The heat absorber 34 is a device in which the refrigerant flowing through the expander 33 takes heat from the air to evaporate, and converts the liquid refrigerant into a low-temperature / low-pressure refrigerant gas. In the heat absorber 34, the temperature of the introduced refrigerant is lower than the temperature of the air. Therefore, when heat is exchanged, the air is cooled and the temperature of the refrigerant is increased. The heat absorber 34 is also called an evaporator.

  The heat exchanger 35 is a heat exchanger provided with a sensible heat type heat exchange element. The heat exchanger 35 is disposed in a space between the heat absorber 34 and the radiator 32, like the heat exchanger 111 (see FIG. 5) in the conventional dehumidifier 100. The heat exchanger 35 includes a first flow path 36 through which air flows in a predetermined direction and a second flow path 37 through which air flows in a direction substantially orthogonal to the first flow path 36. The first flow path 36 is a flow path that leads air introduced from the heat absorber 34 to the radiator 32. The second flow path 37 is a flow path that leads the air introduced from the heat exchange ventilator 10 to the radiator 32. Then, the heat exchanger 35 exchanges only sensible heat between the air flowing through the first flow path 36 and the air flowing through the second flow path 37.

  The water introduction unit 38 is a device for collecting water (condensed water) generated by the occurrence of dew condensation in the dehumidification process in a funnel-shaped water collection unit, and introducing the collected water to the radiator 32. Specifically, the water introduction section 38 is provided below the heat absorber 34 and the heat exchanger 35, and water condensed in the heat absorber 34 (condensed water 34 a) and water condensed in the heat exchanger 35 (condensed water 35 a ) Is collected and introduced into the radiator 32. The introduction of water into the radiator 32 is performed, for example, by a natural fall from the water introduction unit 38. The water (condensed water 34a and dew condensation water 35a) introduced into the radiator 32 adheres to the surface of a radiator pipe or the like constituting the radiator 32, and the temperature of the radiator 32 rises or evaporates due to the heat of the radiator 32. Here, the water whose temperature has risen flows down below the radiator 32 and is drained from a drain pipe 39 connected to a drainage facility of a housing facility. On the other hand, the vaporized water is led out to the air supply air passage 5 by the air supply flow 3 flowing through the radiator 32 and discharged into the room. Although the water to be vaporized is only a small part, the vaporized water increases the humidity of the supply air flow 3 led to the supply air passage 5. For this reason, in the present embodiment, the humidity of the supply air flow 3 led out to the supply air passage 5 is controlled by reflecting the amount of humidity that rises due to the vaporized water.

  Next, the flow of the air flow (exhaust flow 2, supply air flow 3) between the heat exchange ventilator 10 and the dehumidifier 30 will be described with reference to FIG. In the following description, the air flow (exhaust air flow 2, supply air flow 3) or the air passage (exhaust air passage 4, air supply air passage 5) after the heat exchange passes through the heat exchange element 12 in the heat exchange ventilator 10. The air flow or the air path before the heat exchange indicates the air flow or the air path before passing through the heat exchange element 12.

  As shown in FIG. 3, in the heat exchange type ventilation device 10, a switching damper 40 is installed in the exhaust air passage 4 after heat exchange, and a switching damper 41 is installed in the supply air passage 5 after heat exchange. The switching damper 40 is a damper for switching between a state in which the exhaust airflow 2 flowing through the exhaust airflow path 4 flows outside and a state in which the exhaust airflow 2 flowing through the exhaust airflow path 4 flows through the dehumidifier 30. The switching damper 41 is a damper for switching between a state in which the supply airflow 3 flowing through the supply airflow path 5 flows indoors and a state in which the supply airflow 3 flowing through the supply airflow path 5 flows to the dehumidifier 30.

  In the heat exchange type ventilator 50 with the dehumidification function, the air flow flows to the dehumidification device 30 by each switching damper, so that the supply air flow 3 after the heat exchange is dehumidified. Details of the dehumidification will be described later. In addition, in a winter season or the like in which dehumidification is not required, the airflow does not flow to the dehumidifier 30 by each switching damper, thereby suppressing an increase in pressure loss due to the dehumidifier 30 and providing a heat with a dehumidifier function. As the exchange-type ventilation device 50, operation with energy saving can be realized throughout the year.

  As shown in FIG. 3, the dehumidifier 30 has a branch damper that divides the supply air flow 3 after the heat exchange introduced therein into two air flows (a first air supply flow 3 a and a second air supply flow 3 b). 42 are provided. The first air flow 3a is introduced into the heat absorber 34 and flows through the first flow path 36, and the second air flow 3b is introduced into the heat exchanger 35 and flows through the second flow path 37. is there. The branch damper 42 is configured to change the ratio of the air volume of the first air flow 3a to the air volume of the second air flow 3b. In other words, the branch damper 42 can easily increase or decrease the ratio of the first supply flow 3a to the second supply flow 3b by adjusting the angle of the damper (the branch ratio of the supply flow 3 after heat exchange). Has become. Here, the first air supply flow 3a corresponds to “a part of the air supply flow introduced into the dehumidifier”, and the second air supply flow 3b corresponds to the “other air supply flow introduced into the dehumidifier”. Part ".

  In the dehumidifying device 30, the first supply airflow 3a of the divided supply airflows 3 flows through the heat absorber 34, the first flow path 36 of the heat exchanger 35, and the radiator 32 in this order, and then flows through the heat exchange ventilator 10. It is led to the supply air passage 5 after the heat exchange. On the other hand, the second supply airflow 3b flows through the second flow path 37 of the heat exchanger 35 and the radiator 32 in this order, and is then led out to the supply airflow path 5 after the heat exchange. In the present embodiment, the dehumidifying device 30 is configured to combine the first supply airflow 3a flowing through the heat exchanger 35 with the second supply airflow 3b flowing through the heat exchanger 35, and then supply air after the heat exchange. 5 is derived. Thereby, the temperature of the supply air flow 3 blown into the room is adjusted. A method of adjusting the temperature of the supply air flow 3 blown into the room will be described later.

  On the other hand, the exhaust gas flow 2 introduced into the dehumidifier 30 flows through the radiator 32 and is then led out to the exhaust air passage 4 after heat exchange in the heat exchange type ventilation device 10. That is, in the present embodiment, the dehumidifier 30 is configured such that the radiator 32 is cooled by the exhaust gas flow 2 introduced from the heat exchange ventilator 10.

  Next, the dehumidifying operation of the heat exchange ventilator 50 with the dehumidifying function according to the first embodiment will be described.

  First, the exhaust fan 13 and the air supply fan 16 are driven by operating the heat exchange ventilator 50 with the dehumidifying function, and the exhaust flow 2 flowing through the exhaust air passage 4 is provided inside the heat exchange ventilator 10. And the supply air flow 3 flowing through the supply air passage 5 is generated.

  For example, in summer, the exhaust stream 2 is indoor air conditioned to a comfortable temperature and humidity by an air conditioner or the like, and the supply stream 3 is hot and humid outdoor air.

  The exhaust flow 2 and the supply air flow 3 exchange sensible heat and latent heat inside the heat exchange ventilator 10. At this time, since the moisture moves from the high-temperature and high-humidity air supply flow 3 to the exhaust air flow 2, the water in the air supply flow 3 is removed. That is, dehumidification (first dehumidification) of the supply airflow 3 is performed by the total heat exchange inside the heat exchange ventilator 10.

  Next, the supply air flow 3 after the heat exchange is introduced into the dehumidifier 30 to be dehumidified. Specifically, the first supply airflow 3 a of the supply airflow 3 introduced into the dehumidifier 30 is cooled by the heat absorber 34. As a result, the temperature of the first supply air flow 3a becomes equal to or lower than the dew point temperature, and the first supply air flow 3a condenses, so that the moisture of the first supply air flow 3a is removed. That is, by flowing through the heat absorber 34, dehumidification (second dehumidification) of the first air supply flow 3a is performed.

  In addition, the remaining second supply airflow 3 b of the supply airflow 3 introduced into the dehumidifier 30 flows into the second flow passage 37 of the heat exchanger 35 and is cooled by the heat absorber 34 in the first flow passage 36. The heat is exchanged with the first supply air flow 3a. As a result, the second air supply flow 3b in the second flow path 37 is cooled and condensed, so that the water in the second air supply flow 3b is removed. That is, by performing sensible heat exchange in the heat exchanger 35, dehumidification (third dehumidification) of the second supply airflow 3b is performed.

  In other words, the heat exchange type ventilator 50 with the dehumidification function can perform outdoor high temperature and high humidity by dehumidification (first dehumidification to third dehumidification) by the heat exchange type ventilator 10, the heat absorber 34, and the heat exchanger 35. Moisture is removed from the air supply stream 3 to ensure a necessary amount of dehumidification.

  Next, cooling of the radiator 32 of the dehumidifying device 30 during the dehumidifying operation of the heat exchange type ventilator 50 with the dehumidifying function will be described.

  The dehumidifier 30 collects water (dew condensation water 34a) dewed in the second dehumidification by the water introduction unit 38 and water (dew condensation water 35a) dew condensed in the third dehumidification, and dissipates the radiator 32 (the radiator 32). It is configured to be introduced into the second region 32b). In addition, the dehumidifying device 30 is configured to introduce the exhaust gas flow 2 from the exhaust air passage 4 of the heat exchange type ventilator 10, and the introduced exhaust gas flow 2 flows through the radiator 32 (the first region 32a of the radiator 32). It has become. In other words, in the present embodiment, the dehumidifying device 30 requires the sensible heat or vaporization heat of the water introduced into the radiator 32 from the water introduction unit 38 and the exhaust flow 2 (dehumidification) from the heat exchange ventilator 10. In summer, the radiator 32 is configured to be cooled by the air heat of the exhaust flow having a lower temperature than the supply air flow 3). Note that the exhaust flow 2 that has taken heat from the radiator 32 is led out to the exhaust air passage 4 and discharged as it is outdoors.

  On the other hand, the dehumidifying device 30 is configured such that the dehumidified supply air flow 3 flows through the radiator 32 (the second region 32b of the radiator 32). That is, the dehumidified supply air flow 3 also cools the radiator 32. However, in the present embodiment, since the radiator 32 is cooled by the water introduced from the water introduction section 38 and the exhaust stream 2 from the heat exchange type ventilator 10, the supply flow 3 As compared with the case where only the air is circulated and cooled, it is possible to suppress a rise in the temperature of the supply air flow 3 led from the dehumidifier 30 to the supply air passage 5.

  Next, a method of adjusting the temperature of the supply air flow 3 in the heat exchange ventilator 50 with a dehumidifying function according to the first embodiment will be described.

  As shown in FIG. 3, the heat exchange ventilator 50 with the dehumidifying function includes a first temperature sensor 45 for detecting the air temperature of the exhaust gas flow 2 before the heat exchange in relation to the control of the branch ratio of the branch damper 42. And a second temperature sensor 46 for detecting an air temperature of the supply air flow 3 (a mixed air flow of the first air supply flow 3a and the second air supply flow 3b) after flowing through the heat exchanger 35 of the dehumidifying device 30 and joining. A control unit (not shown) for controlling the branch damper 42.

  The control unit adjusts the branch ratio of the branch damper 42 based on the temperature detected by the first temperature sensor 45, and controls the branch damper 42 so that the temperature detected by the second temperature sensor 46 falls within a predetermined temperature range. Control. Specifically, when the temperature at the second temperature sensor 46 is higher than the temperature at the first temperature sensor 45, the control unit determines that the air flow rate of the first air flow 3a relative to the air flow rate of the second air flow 3b. And the temperature of the supply airflow 3 after dehumidification is lowered. On the other hand, when the temperature at the second temperature sensor 46 is lower than the temperature at the first temperature sensor 45, the controller reduces the air volume of the first air flow 3a with respect to the air volume of the second air flow 3b. , The temperature of the supply airflow 3 is increased. Thereby, in the heat exchange type ventilator 50 with the dehumidification function, it becomes possible to supply the supply air flow 3 having the same temperature as the first temperature sensor 45 (the exhaust flow 2 before the heat exchange sucked in from the room). .

  As described above, according to heat exchange ventilator 50 with a dehumidifying function according to the first embodiment, the following effects can be obtained.

  (1) The dehumidifier 30 is provided with a water inlet 38 for introducing water (condensed water 34a and condensed water 35a) condensed in the dehumidification process into the radiator 32. The water introduced from the water inlet 38 and the dehumidifier The radiator 32 is cooled by the exhaust stream 2 introduced into the radiator 30. As a result, energy required for cooling (discharging heat) of the radiator 32 in the dehumidifier 30 is converted into sensible heat or vaporization heat of the water (condensed water 34a, dew water 35a) introduced into the radiator 32 from the water inlet 38. And the air heat of the exhaust flow 2 from the heat exchange type ventilator 10 (exhaust flow having a lower temperature than the supply air flow 3 in summer when dehumidification is required), so that the radiator 32 can be effectively used. It can be cooled, and the temperature rise of the supply air flow 3 flowing through the radiator 32 after dehumidification can be suppressed. As a result, even when the dehumidifying device 30 in which the refrigeration cycle and the heat exchanger 35 are combined is applied, the supply air flow 3 in which the temperature rise caused by the dehumidification is suppressed can be blown. That is, the heat exchange ventilator 50 with the dehumidifying function can blow the supply airflow 3 in which the temperature rise caused by the dehumidification is suppressed.

  (2) In the dehumidifier 30, the supply air flow 3 dehumidified in the dehumidifier 30 is supplied to the second region 32b of the radiator 32 cooled by the water (condensed water 34a, dew water 35a) introduced from the water inlet 38. And the exhaust gas 2 introduced into the dehumidifying device 30 while flowing through the air supply passage 5, is cooled by the water introduced from the water introduction unit 38 via the second region 32 b through the first region 32 a. And is led to the exhaust air passage 4. Thereby, since the water introduced from the water introduction part 38 directly cools the second area 32b of the radiator 32 through which the dehumidified air flow 3 flows, it is possible to reliably suppress the temperature rise of the air flow 3. it can.

  (3) In the dehumidifier 30, the water introduction unit 38 collects water condensed in the heat absorber 34 (condensed water 34 a) and water condensed in the heat exchanger 35 (condensed water 35 a), and radiator 32 It was configured to be introduced into. Thereby, since the amount of water introduced into the radiator 32 can be further increased, the radiator 32 can be cooled stably.

  (4) In the dehumidifier 30, the temperature of the supply airflow 3 supplied from the dehumidifier 30 to the room is adjusted by controlling the ratio of the airflow of the first airflow 3 a to the airflow of the second airflow 3 b. did. Thereby, the temperature of the second air flow 3b flowing through the second flow path 37 can be further reduced by the air flow cooled by the heat absorber 34 (the first air flow 3a flowing through the first flow path 36). The temperature of the supply air flow 3 supplied into the room can be easily adjusted to a desired temperature.

(Embodiment 2)
The heat exchange type ventilator 50a with the dehumidifying function according to the second embodiment of the present invention is configured such that the entire radiator 32 in the dehumidifier 30a is disposed in the exhaust air passage 4 and the exhaust flow 2 flows. On the other hand, the second embodiment differs from the first embodiment in that the dehumidified supply air flow 3 is configured not to flow through the radiator 32. Other configurations of the heat exchange ventilator with dehumidification function 50a are the same as those of the heat exchange ventilator with dehumidification function 50 according to the first embodiment. Hereinafter, the contents already described in the first embodiment will not be described again, and the points different from the first embodiment will be mainly described.

  A heat exchange ventilator 50a with a dehumidifying function according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 4 is a schematic diagram showing a configuration of a heat exchange type ventilator with a dehumidifying function according to Embodiment 2 of the present invention.

  In the dehumidifier 30a of the heat exchange type ventilator 50a with a dehumidifier function, the radiator 32 constituting the refrigeration cycle is entirely disposed in the exhaust air passage 4, and other devices (compressor 31, expander 33, The heat absorber 34 and the heat exchanger 35) are arranged outside the exhaust air passage 4. That is, the water introduction unit 38 is configured to introduce water (condensed water 34a, dew water 35a) condensed by the dehumidification process into the radiator 32 disposed in the exhaust air passage 4.

  As shown in FIG. 4, in the dehumidifier 30 a, the first supply airflow 3 a of the divided supply airflows 3 flows through the heat absorber 34 and the first flow path 36 of the heat exchanger 35 in this order, and then passes through the radiator 30. Without being circulated through the heat exchanger 32, it is led to the supply air passage 5 after the heat exchange in the heat exchange ventilator 10. On the other hand, after flowing through the second flow path 37 of the heat exchanger 35, the second supply airflow 3b is led out to the supply airflow path 5 after the heat exchange without flowing through the radiator 32. Then, the dehumidifier 30a merges the first air supply flow 3a flowing through the heat exchanger 35 and the second air supply flow 3b flowing through the heat exchanger 35, and then leads the air to the air supply passage 5 after the heat exchange. It is configured as follows.

  Next, cooling of the radiator 32 of the dehumidifier 30a during the dehumidifying operation of the heat exchange ventilator 50a with the dehumidifying function will be described.

  The dehumidifier 30a collects water (dew condensation water 34a) dewed in the second dehumidification by the water introduction unit 38 and water (dew condensation water 35a) dew condensed in the third dehumidification, and dissipates heat in the exhaust air passage 4. It is configured to be introduced into the vessel 32. In addition, the dehumidifier 30 a is configured to introduce the exhaust flow 2 from the exhaust air passage 4 of the heat exchange ventilator 10, and the introduced exhaust flow 2 flows through the radiator 32. That is, in the present embodiment, the dehumidifying device 30a uses the sensible heat or vaporization heat of the water introduced into the radiator 32 from the water introduction unit 38 and the air heat of the exhaust stream 2 from the heat exchange ventilator 10. The radiator 32 is configured to be cooled. In addition, the exhaust stream 2 which has taken heat from the radiator 32 is led out to the exhaust air path 4 and discharged as it is outdoors.

  On the other hand, the dehumidifying device 30a is configured so that the dehumidified supply air flow 3 does not flow through the radiator 32. That is, the dehumidified supply air flow 3 (the first supply air flow 3a and the second supply air flow 3b) is led out to the supply air passage 5 without flowing through the radiator 32, so that the supply air flow 3 ( The temperature of the mixed gas flow of the first air flow 3a and the second air flow 3b does not rise.

  As described above, according to the heat exchange ventilator 50a with the dehumidifying function according to the second embodiment, the following effects can be obtained.

  (5) In the dehumidifier 30a, the supply air flow 3 (the dehumidified supply air flow 3) led out to the supply air passage 5 is led out to the supply air passage 5 without flowing through the radiator 32, while the dehumidifier 30a The exhaust stream 2 introduced into the exhaust gas passage 4 flows through the radiator 32 cooled by the water (condensed water 34 a and dew water 35 a) introduced from the water inlet 38. This allows the dehumidified air (air supply flow 3) to be blown into the room without flowing through the radiator 32, so that the temperature rise caused by the dehumidification can be reliably suppressed. That is, the heat exchange ventilator 50a with the dehumidifying function can blow the supply airflow 3 in which the temperature rise caused by the dehumidification is suppressed.

  As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily inferred. For example, the numerical values given in the above embodiment are merely examples, and other numerical values can naturally be adopted.

  In the first and second embodiments, a sensible heat type heat exchange element is used as the heat exchanger 35. However, as the sensible heat type heat exchange element, the first flow path 36 and the second flow path of the heat exchange element are used. It is preferable that the member constituting 37 has water repellency (hydrophobicity). As the member having water repellency (hydrophobicity), for example, a resin member such as polypropylene or polystyrene is used. By doing so, the condensed water 35a generated inside the heat exchange element easily flows out of the heat exchange element, so that the heat exchange efficiency of the heat exchanger 35 caused by the dew water 35a is reduced. And it is possible to dehumidify.

  In the first embodiment, one radiator is used as the radiator 32, which is divided into the first region 32a and the second region 32b. However, the present invention is not limited to this. For example, the radiator 32 is divided into two radiators: a first radiator (exhaust air passage radiator) corresponding to the first region 32a and a second radiator (supply air passage radiator) corresponding to the second region 32b. And the first radiator and the second radiator may be thermally connected by a copper tube or the like. By doing so, the degree of freedom in arranging the radiator 32 inside the heat exchange ventilator 50 with a dehumidifying function can be increased.

  Further, in the first and second embodiments, the water introduction unit 38 is configured to introduce the dewed water (condensed water 34a and dew condensation water 35a) into the radiator 32, but is not limited thereto. For example, it may be configured such that dewed water is introduced into a copper tube connecting the radiator 32 and the expander 33 that constitute the refrigeration cycle. By doing so, the cooling structure of the radiator 32 inside the heat exchange ventilator 50 with a dehumidifying function can be simplified.

  In the first and second embodiments, the water introduction unit 38 collects water condensed in the heat absorber 34 (condensed water 34 a) and water condensed in the heat exchanger 35 (condensed water 35 a), and radiates heat. Although it was configured to be introduced into the vessel 32, it is not limited to this. For example, the water introduction unit 38 may be configured to collect only water condensed in the heat absorber 34 (condensed water 34 a) and introduce the water to the radiator 32.

  In the first and second embodiments, the water introduction unit 38 introduces water into the radiator 32 by natural fall, but is not limited to this. For example, a water nozzle may be provided at the distal end tube portion of the funnel-shaped water introduction section 38, and water may be sprayed from the water nozzle to the radiator 32 in a mist state. By doing so, the water introducing section 38 can introduce water into a wide area on the surface of the heat radiating pipe or the like constituting the heat radiator 32, so that the heat radiator 32 can be cooled more effectively.

  The heat exchange type ventilator with the dehumidification function according to the present invention enables the supply air flow in which the temperature rise caused by the dehumidification is suppressed even when using the dehumidifier combining the refrigeration cycle and the heat exchanger. Therefore, it is useful as a heat exchange type ventilator that enables indoor and outdoor heat exchange.

DESCRIPTION OF SYMBOLS 1 House 2 Exhaust air flow 3 Supply air flow 3a First air flow 3b Second air flow 4 Exhaust air path 5 Air supply air path 10 Heat exchange type ventilator 11 Body case 12 Heat exchange element 13 Exhaust fan 14 Inner air opening 15 Exhaust port 16 Supply Air fan 17 Outside air port 18 Air supply port 30 Dehumidifier 30a Dehumidifier 31 Compressor 32 Radiator 32a First area 32b Second area 33 Expander 34 Heat absorber 34a Condensed water 35 Heat exchanger 35a Condensed water 36 First flow path 37 Second flow path 38 Water introduction unit 39 Drain pipe 40 Switching damper 41 Switching damper 42 Branch damper 45 First temperature sensor 46 Second temperature sensor 50 Heat exchange ventilator with dehumidification function 50a Heat exchange ventilator with dehumidification function 100 Dehumidification Apparatus 101 Air inlet 102 Body case 103 Dehumidifier 104 Air outlet 105 Compressor 106 Radiator 10 Expander 108 heat sink 109 first passage 110 the second passage 111 heat exchanger

Claims (4)

Heat exchange ventilation that exchanges heat between an exhaust airflow that flows through an exhaust air passage for discharging indoor air to the outside of the room and a supply airflow that flows through an air supply passage for supplying outdoor air to the room. Equipment and
A dehumidifier for dehumidifying the supply air flow,
A heat exchange type ventilator with a dehumidifying function comprising:
The dehumidifier is a refrigeration cycle including a compressor, a radiator, an expander, and a heat absorber, and is disposed between the heat absorber and the radiator, and the air flowing through the first flow path and the second A heat exchanger that exchanges heat with air flowing through the flow path, and a water introduction unit that introduces water condensed in at least the heat absorber to the radiator,
The dehumidifier is configured such that the supply air flow after heat exchange is introduced from the supply air passage, and the exhaust flow is introduced from the exhaust air passage,
Part of the supply air flow introduced into the dehumidifier, the heat absorber, the first flow path of the heat exchanger, the radiator is circulated in order and is led out to the air supply air path,
The other part of the supply air flow introduced into the dehumidifier, the second flow path of the heat exchanger, the radiator is circulated in order and is led out to the air supply air path,
The radiator is cooled by water introduced from the water introduction unit,
The exhaust gas introduced into the dehumidifier flows through the radiator cooled by the water introduced from the water introduction unit, and is led out to the exhaust air passage, wherein heat exchange with a dehumidifying function is provided. Shaped ventilation system. The radiator is disposed in the exhaust air passage and the first region through which the exhaust air flows, and a second region connected to the first region and disposed in the air supply air passage and through which the supply air flows. And an area,
The supply air flow dehumidified in the dehumidifier is led to the supply air flow through the second region of the radiator cooled by water introduced from the water introduction unit,
The exhaust stream introduced into the dehumidifier may flow out through the first area cooled through the second area by the water introduced from the water introduction unit, and be guided to the exhaust air path. The heat exchange ventilator with a dehumidifying function according to claim 1. The water introduction section, and water condensation in the heat absorber, according to claim 1 or, characterized in that it is configured to introduce into the radiator dew condensation and water to the water collecting in the heat exchanger 3. The heat exchange ventilator with a dehumidifying function according to 2 . The temperature of the air supply supplied from the dehumidifier to the room may be adjusted by controlling a ratio of an air flow in a part of the air supply to an air flow in another part of the air supply. The heat exchange ventilator with a dehumidifying function according to any one of claims 1 to 3 .