JP2022166043A - dehumidifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchange type ventilation device with a dehumidifying function capable of blowing a supply airflow suppressed in temperature rise caused accompanying dehumidification.

SOLUTION: A heat exchange type ventilation device 50 with a dehumidifying function includes: a heat exchange type ventilation device 10 exchanging heat between an exhaust airflow 2 flowing through an exhaust air duct 4 and a supply airflow 3 flowing through a supply air duct 5; and a dehumidifier 30 dehumidifying the supply airflow 3. The dehumidifier 30 includes: a refrigeration cycle including a compressor 31, a radiator 32, an expander 33 and a heat sink 34; and a heat exchanger 35 exchanging heat between air flowing through a first flow path 36 and air flowing through a second flow path 37. A first supply airflow 3a introduced into the dehumidifier 30 is led out to the supply air duct 5 after flowing through the heat sink 34, the first flow path 36 and the radiator 32 in this order. A second supply airflow 3b introduced into the dehumidifier 30 is led out to the supply air duct 5 after flowing through the second flow path 37 and the radiator 32 in this order. The exhaust airflow 2 introduced into the dehumidifier 30 is led out to the exhaust air duct 4 after flowing through the radiator 32.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a dehumidifier applied to a heat exchange ventilator with a dehumidifying function used in a living space or the like.

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

In recent years, due to the effects of global warming and the improvement in the airtightness of houses, there is a shortage of exhaust heat and moisture in the room, especially in the summer, and the indoor comfort is impaired due to the high temperature and humidity. It is feared that In order to improve indoor comfort in summer, it is particularly important to lower the indoor humidity. Therefore, there is a demand for a heat exchange ventilator with a dehumidifying function that performs heat exchange ventilation while adjusting the indoor humidity. For this reason, we are developing a heat-exchange ventilator with a dehumidification function that applies a dehumidifier that combines a refrigeration cycle and a heat exchanger. As a dehumidifier that combines a refrigeration cycle and a heat exchanger, for example, the dehumidifier described in Patent Document 1 is known.

A conventional dehumidifier will be described with reference to FIG.

As shown in FIG. 9, in the conventional dehumidifier 100, the air (air X, air Y) sucked into the main body case 102 from the air suction port 101 passes through the dehumidifying section 103, and then from the air outlet 104. It is configured to blow out to the outside of the main body case 102 . The dehumidifying section 103 is arranged between the refrigerating cycle in which the compressor 105, the radiator 106, the expander 107, and the heat absorber 108 are connected in this order, and the heat absorber 108 and the heat radiator 106. The air X flowing through the first flow path 109 is and a heat exchanger 111 that exchanges heat between the air Y flowing through the second flow path 110 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 condensation occurs. Condensed water generated by the occurrence of this dew condensation is recovered. 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, is cooled, and dew condensation occurs. Condensed water generated by the occurrence of this dew condensation is also collected. As a result, the conventional dehumidifier 100 ensures high dehumidification performance.

WO2016/031139

However, the conventional dehumidifier 100 is configured to allow dehumidified air to pass 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 the temperature of the dehumidified air that has passed through the radiator 106 is will rise above the temperature of the air before dehumidification. As a result, when the dehumidification mechanism of the conventional dehumidifier 100 is arranged in the supply air passage of the heat exchange type ventilation system to perform dehumidification, the dehumidified air (air whose temperature has risen) is blown into the room as it is as the supply air flow. , a problem arises that the comfort in the room is impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a dehumidifier applied to a heat exchange ventilator with a dehumidification function capable of blowing a supply air flow in which the temperature rise caused by dehumidification is suppressed. It is something to do.

In order to achieve this object, the dehumidifier according to the present invention communicates with an exhaust air passage through which an exhaust flow of a heat exchange type ventilator flows and an intake air passage through which an intake air flow of the heat exchange type ventilation device flows. A connected dehumidifier. The dehumidifying device is a refrigeration cycle configured by connecting a compressor, a radiator, an expander, and a heat absorber in this order, and a heat exchanger that exchanges heat between the air flowing through the first flow path and the air flowing through the second flow path. Including vessel and. The dehumidifier is configured such that the supply air flow after heat exchange by the heat exchange type ventilator is introduced from the supply air passage and the exhaust air flow is introduced from the exhaust air passage. A part of the supply airflow introduced into the dehumidifier flows through the heat absorber, the first flow path of the heat exchanger, and the radiator in this order, and then is led out to the supply airflow path and the other part of the supply airflow introduced into the dehumidifier. The air flows through the second flow path of the heat exchanger and the radiator in this order, and then is led out to the supply air flow path. The exhaust flow introduced into the dehumidifier is characterized in that it flows through the radiator and then is led out to the exhaust air passage.

Another dehumidifier according to the present invention is a dehumidifier connected in communication with an exhaust air passage through which an exhaust air flow of a heat exchange ventilator flows and an air supply air passage through which an air supply air flow of a heat exchange ventilator flows. is. The dehumidifier is arranged between a refrigerating cycle including a compressor, a radiator, an expander, and a heat absorber, and between the heat absorber and the heat radiator, and separates the air flowing through the first flow path from the second flow path. a heat exchanger that exchanges heat with the flowing air. The dehumidifier is configured such that the supply air flow after heat exchange is introduced from the supply air passage and the exhaust air flow is introduced from the exhaust air passage. A part of the supply airflow introduced into the dehumidifier flows through the heat absorber, the first flow path of the heat exchanger, and the radiator in this order, and then is led out to the supply airflow path and the other part of the supply airflow introduced into the dehumidifier. The air flows through the second flow path of the heat exchanger and the radiator in this order, and then is led out to the supply air flow path. The exhaust flow introduced into the dehumidifier is the exhaust flow before heat exchange by the heat exchange type ventilator, and is characterized in that it is led out to the exhaust air passage after circulating through the radiator.

Further, still another dehumidifier according to the present invention is a dehumidifier connected in communication with an exhaust air passage through which an exhaust air flow of a heat exchange ventilator circulates and a supply air passage through which an air supply air flow of the heat exchange ventilator circulates. It is a device. The dehumidifier is arranged between a refrigerating cycle including a compressor, a radiator, an expander, and a heat absorber, and between the heat absorber and the heat radiator, and separates the air flowing through the first flow path from the second flow path. a heat exchanger that exchanges heat with the flowing air. The dehumidifier is configured such that the supply air flow after heat exchange is introduced from the supply air passage and the exhaust air flow is introduced from the exhaust air passage. A part of the supply airflow introduced into the dehumidifier flows through the heat absorber, the first flow path of the heat exchanger, and the radiator in this order, and then is led out to the supply airflow path and the other part of the supply airflow introduced into the dehumidifier. The air flows through the second flow path of the heat exchanger and the radiator in this order, and then is led out to the supply air flow path. The exhaust flow introduced into the dehumidifier is an exhaust flow in which the exhaust flow before heat exchange by the heat exchange type ventilation device and the exhaust flow after heat exchange are combined, and after circulating through the radiator, the exhaust flow flows into the exhaust air passage. It is characterized by being derived.

Further, still another dehumidifier according to the present invention is a dehumidifier connected in communication with an exhaust air passage through which an exhaust air flow of a heat exchange ventilator circulates and a supply air passage through which an air supply air flow of the heat exchange ventilator circulates. It is a device. The dehumidifier is configured by connecting in order a compressor, a first radiator, a first expander, a second radiator different from the first radiator, a second expander different from the first expander, and a heat absorber. and a heat exchanger disposed between the heat absorber and the second radiator for exchanging heat between the air flowing through the first flow path and the air flowing through the second flow path. The dehumidifier is configured such that the supply air flow after heat exchange is introduced from the supply air passage and the exhaust air flow is introduced from the exhaust air passage. A part of the supply airflow introduced into the dehumidifier flows through the heat absorber, the first flow path of the heat exchanger, and the second radiator in this order, and is then led out to the supply airflow path, where it is added to the supply airflow introduced into the dehumidifier. The portion of ( ) flows through the second flow path of the heat exchanger and the second radiator in that order, and then is led out to the supply air flow path. The exhaust flow introduced into the dehumidifier is characterized in that it is led out to the exhaust air passage after passing through the first radiator.

Advantageous Effects of Invention According to the present invention, it is possible to provide a dehumidifier applied to a heat exchange ventilator with a dehumidification function capable of blowing a supply air flow in which an increase in temperature caused by dehumidification is suppressed.

FIG. 1 is a schematic diagram showing an installation state in a house of a heat exchange type ventilation system according to a premise example of the present invention. FIG. 2 is a schematic diagram showing the configuration of a heat exchange ventilator according to a premise example of the present invention. FIG. 3 is a schematic diagram showing the configuration of the heat exchange ventilator with a dehumidifying function according to Embodiment 1 of the present invention. FIG. 4 is a schematic diagram showing the configuration of a heat exchange ventilator with a dehumidifying function according to Embodiment 2 of the present invention. FIG. 5 is a schematic diagram showing the configuration of a heat exchange ventilator with a dehumidifying function according to Embodiment 3 of the present invention. FIG. 6 is a schematic diagram showing the configuration of a heat exchange ventilator with a dehumidifying function according to Embodiment 4 of the present invention. FIG. 7 is a Mollier chart during dehumidification operation of the heat exchange ventilator with dehumidification function according to Embodiment 4 of the present invention. FIG. 8 is a schematic diagram showing the configuration of a heat exchange ventilator with a dehumidifying function according to Embodiment 5 of the present invention. FIG. 9 is a schematic cross-sectional view showing the configuration of a conventional dehumidifier.

The heat exchange ventilator with a dehumidifying function according to the present invention has an exhaust airflow circulating through an exhaust airway for discharging indoor air to the outside and an air supply airway for supplying outdoor air into the room. and a dehumidifier for dehumidifying the supply airflow. The dehumidifier is arranged between a refrigerating cycle including a compressor, a radiator, an expander, and a heat absorber, and between the heat absorber and the heat radiator, and separates the air flowing through the first flow path from the second flow path. a heat exchanger that exchanges heat with the flowing air. The dehumidifier is configured such that the supply air flow after heat exchange is introduced from the supply air passage and the exhaust air flow is introduced from the exhaust air passage. A part of the supply airflow introduced into the dehumidifier flows through the heat absorber, the first flow path of the heat exchanger, and the radiator in this order, and then is led out to the supply airflow path and the other part of the supply airflow introduced into the dehumidifier. The air flows through the second flow path of the heat exchanger and the radiator in this order, and then is led out to the supply air flow path. The exhaust flow introduced into the dehumidifier is characterized in that it flows through the radiator and then is led out to the exhaust air passage.

According to such a configuration, the energy required for cooling (exhaust heat) of the radiator in the dehumidifier is supplied to the exhaust flow from the heat exchange type ventilator (exhaust flow whose temperature is lower than the supply air flow in the summer when dehumidification is required). Therefore, the temperature rise of the dehumidified air (supply airflow) can be suppressed. As a result, even when a dehumidifying device that combines a refrigeration cycle and a heat exchanger is applied, it is possible to blow a supply airflow in which temperature rise caused by dehumidification is suppressed. That is, it is possible to provide a heat exchange ventilator with a dehumidification function capable of blowing a supply air flow in which the temperature rise caused by dehumidification is suppressed.

Further, the exhaust flow introduced into the dehumidifier may be configured to be the exhaust flow before heat exchange.

According to such a configuration, since the exhaust flow before heat exchange having a lower temperature than the exhaust flow after heat exchange is used, the radiator can be cooled more effectively. Temperature rise can be further suppressed.

Further, the exhaust flow introduced into the dehumidifier may be configured to be an exhaust flow in which the exhaust flow before heat exchange and the exhaust flow after heat exchange are combined.

According to such a configuration, since the exhaust flow before heat exchange and the exhaust flow after heat exchange are merged, the air volume of the exhaust flow introduced into the dehumidifier is reduced while the temperature is lower than that of the exhaust flow after heat exchange. can be increased. Therefore, the heat radiator can be effectively cooled, and the temperature rise of the dehumidified air (supply airflow) can be suppressed.

Further, in the heat exchange ventilator with dehumidification function according to the present invention, the radiator has a first radiator and a second radiator different from the first radiator, and the expander is the first expander and a second inflator different from the first inflator. A refrigerating cycle is configured by connecting a compressor, a first radiator, a first expander, a second radiator, a second expander, and a heat absorber in this order. A heat exchanger is disposed between the heat absorber and the second radiator. A portion of the supply airflow introduced into the dehumidifier is led out to the supply airflow path after passing through the heat absorber, the first flow path of the heat exchanger, and the second radiator in this order. The other portion of the supply airflow introduced into the dehumidifier is led out to the supply airflow path after passing through the second flow path of the heat exchanger and the second radiator in that order. The exhaust flow introduced into the dehumidifier may be introduced into the exhaust air passage after passing through the first radiator.

According to such a configuration, the refrigerant in the refrigeration cycle (refrigerant introduced from the first radiator cooled by the exhaust flow) is decompressed by the first expander, so that the temperature of the refrigerant introduced into the second radiator can be made lower than the temperature of the refrigerant introduced into the first radiator, it is possible to suppress an increase in the temperature of the supply airflow when heat is exchanged between the supply airflow and the second radiator. That is, it is possible to provide a heat exchange ventilator with a dehumidification function capable of blowing a supply air flow in which the temperature rise caused by dehumidification is suppressed.

Moreover, it is good also as a structure provided with the air flow volume adjustment part which increases/decreases the air which flows through a 2nd flow path between the 2nd flow path of a heat exchanger, and a 2nd radiator.

According to such a configuration, it is possible to make the ratio between the volume of air flowing through the first flow path and the volume of air flowing through the second flow path variable. Therefore, by making the volume of air flowing through the first flow path larger than the volume of air flowing through the second flow path, the temperature of the air flowing through the second radiator can be effectively lowered. The dehumidification effect can be enhanced.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. It should be noted that the following embodiment is an example that embodies the present invention, and does not limit the technical scope of the present invention. In addition, throughout the drawings, the same parts are denoted by the same reference numerals, and the description thereof is omitted. Furthermore, in order to avoid duplication of details of each part that is not directly related to the present invention, description for each drawing is omitted.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

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

In FIG. 1, a heat exchange type ventilator 10 is installed indoors in a house 1 . The heat exchange ventilator 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 outdoors through the heat exchange ventilator 10 as indicated by the black arrows. Exhaust flow 2 is the flow of air discharged from indoors to outdoors. In addition, the supplied air flow 3 is taken into the room via the heat exchange type ventilator 10 as indicated by the white arrow. The supply airflow 3 is a flow of air taken indoors from outdoors. For example, in winter in Japan, the exhaust stream 2 is at 20-25° C., while the intake stream 3 can reach below freezing. The heat exchange type ventilator 10 performs ventilation and transfers the heat of the exhaust flow 2 to the supply air flow 3 during this ventilation, thereby suppressing unnecessary heat release.

As shown in FIG. 2, the heat exchange type 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, an exhaust An air passage 4 and an air supply passage 5 are provided. The body case 11 is the outer frame of the heat exchange type ventilator 10 . An inside air port 14 , an exhaust port 15 , an outside air port 17 and an air supply port 18 are formed on the outer periphery of the body case 11 . The internal air inlet 14 is an inlet that draws the exhaust flow 2 into the heat exchange ventilator 10 . The exhaust port 15 is a discharge port that discharges the exhaust flow 2 from the heat exchange type ventilator 10 to the outside. The outside air port 17 is an intake port that draws the supply air flow 3 into the heat exchange ventilator 10 . The air supply port 18 is a discharge port for discharging the supply airflow 3 from the heat exchange type ventilator 10 indoors.

A heat exchange element 12 , an exhaust fan 13 and an air supply fan 16 are attached inside the body case 11 . Further, an exhaust air passage 4 and an air supply air passage 5 are formed inside the body case 11 . The heat exchange element 12 is a member for performing heat exchange (sensible heat and latent heat) between the exhaust flow 2 flowing through the exhaust air passage 4 and the supply air flow 3 flowing through the supply air passage 5 . The exhaust fan 13 is a blower for sucking the exhaust flow 2 from the internal air port 14 and discharging it from the exhaust port 15 . The air supply fan 16 is a fan for sucking the supply airflow 3 from the outside air port 17 and discharging it from the air supply port 18 . The exhaust air passage 4 is an air passage that connects the internal air port 14 and the air exhaust port 15 . The supply air passage 5 is an air passage 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 to the outside through the exhaust port 15 . The air flow 3 sucked by the air supply fan 16 passes through the heat exchange element 12 in the air supply air passage 5 and the air supply fan 16 and is supplied indoors from the air supply port 18 .

When performing heat exchange ventilation, the heat exchange type ventilator 10 operates the exhaust fan 13 and the supply air 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. , heat exchange with the supply air flow 3 flowing through the supply air passage 5 . As a result, when performing ventilation, the heat exchange type ventilator 10 transfers the heat of the exhaust flow 2 that is released to the outside to the supply air flow 3 that is taken into the room, suppresses the release of unnecessary heat, and heats the room. recover. As a result, in winter, when ventilation is performed, it is possible to suppress a decrease in the indoor temperature by air having a low outdoor temperature. On the other hand, in the summer, when ventilation is performed, the indoor temperature rise can be suppressed by the outdoor air having a high temperature.

(Embodiment 1)
Next, referring to FIG. 3, the heat exchange ventilator with a dehumidifying function according to the first embodiment will be described. FIG. 3 is a schematic diagram showing the configuration of the heat exchange ventilator with a dehumidifying function according to Embodiment 1 of the present invention. 3 and subsequent schematic diagrams, the exhaust airflow path 4 and the supply airflow path 5 are also shown as the flows of the exhaust airflow 2 and the air supply airflow 3 (black arrows) in the heat exchange type ventilator 10. there is

As shown in FIG. 3, the heat exchange ventilator 50 with a dehumidification function according to Embodiment 1 includes a dehumidifier 30 as means for imparting a dehumidification function to the heat exchange ventilator 10 according to the premise example. It has a configuration in which

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 , and a heat exchanger 35 . The refrigerating cycle of the present embodiment is configured by annularly connecting a compressor 31, a radiator 32, an expander 33, and a heat absorber 34 in this order. The refrigeration cycle uses, for example, a CFC substitute (HFC134a) as a refrigerant. In addition, copper pipes are often used to connect devices that constitute the refrigeration cycle, and are connected by welding.

The compressor 31 is a device that compresses a low-temperature, low-pressure refrigerant gas (working medium gas) in the refrigeration cycle and increases the pressure to raise the temperature. In this 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 that has become high temperature and high pressure by the compressor 31 and the air (exhaust flow 2, supply flow 3). is. At this time, the refrigerant gas is condensed and liquefied under high pressure. In the radiator 32, the temperature of the introduced refrigerant gas (approximately 45° C.) is higher than the temperature of the air, so heat exchange raises the temperature of the air and cools the refrigerant gas. Note that the radiator 32 is also called a condenser.

The expander 33 is a device that reduces the pressure of the high-pressure refrigerant liquefied by the radiator 32 to the original low-temperature, low-pressure liquid. Note that 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 and evaporates, converting the liquid refrigerant into a low-temperature, low-pressure refrigerant gas. In the heat absorber 34, since the temperature of the introduced refrigerant is lower than the temperature of the air, heat exchange cools the air and raises the temperature of the refrigerant. Note that the heat absorber 34 is also called an evaporator.

The heat exchanger 35 is a heat exchanger equipped with a sensible heat exchange element. The heat exchanger 35 is arranged in the space between the heat absorber 34 and the heat radiator 32, like the heat exchanger 111 (see FIG. 9) in the conventional dehumidifier 100. As shown in FIG. Inside the heat exchanger 35 , 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 perpendicular to the first flow path 36 are provided. The first flow path 36 is a flow path for leading the air introduced from the heat absorber 34 to the heat radiator 32 . The second flow path 37 is a flow path that guides the air introduced from the heat exchange type ventilator 10 to the radiator 32 . 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 .

Next, the flow of airflow (exhaust airflow 2, supply airflow 3) between the heat exchange type 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 air passage (exhaust air passage 4, supply air passage 5) after heat exchange passes through the heat exchange element 12 in the heat exchange type ventilator 10. The airflow or airpath before heat exchange indicates the airflow or airpath before passing through the heat exchange element 12 .

As shown in FIG. 3, in the heat exchange type ventilator 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 flow 2 flowing through the exhaust air passage 4 is allowed to flow outdoors and a state in which the exhaust flow 2 flowing through the exhaust air passage 4 is allowed to flow to the dehumidifier 30 . The switching damper 41 is a damper for switching between a state in which the supply air flow 3 flowing through the supply air passage 5 is allowed to flow indoors and a state in which the supply air flow 3 flowing through the supply air passage 5 is allowed to flow to the dehumidifier 30 .

In the heat exchange ventilator 50 with a dehumidifying function, each switching damper causes the airflow to flow through the dehumidifier 30, thereby dehumidifying the supplied airflow 3 after heat exchange. Details of dehumidification will be described later. In the winter when dehumidification is not required, each switching damper prevents the airflow from flowing through the dehumidifier 30, thereby suppressing an increase in pressure loss caused by the dehumidifier 30. As the replaceable ventilator 50, energy-saving operation can be realized throughout the year.

Further, as shown in FIG. 3, the dehumidifier 30 includes a branch damper that divides the heat-exchanged supply airflow 3 introduced into the inside into two airflows (a first supply airflow 3a and a second supply airflow 3b). 42 are installed. The first supply airflow 3 a is the airflow introduced into the heat absorber 34 , and the second supply airflow 3b is the airflow introduced into the heat exchanger 35 . The branch damper 42 divides the supply airflow 3 so that the amount of air flowing through the second supply airflow 3b is smaller than that of the first supply airflow 3a. Here, the first supply airflow 3a corresponds to "part of the supply airflow introduced into the dehumidifier" in the claims, and the second supply airflow 3b corresponds to "other than the supply airflow introduced into the dehumidifier" in the claims. "part of".

In the dehumidifier 30, the first supply airflow 3a of the divided supply airflow 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 out to the supply air passage 5 after 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 then is led out to the supply airflow path 5 after heat exchange. In the present embodiment, the dehumidifier 30 merges the first supply airflow 3a that has passed through the radiator 32 and the second supply airflow 3b that has passed through the radiator 32, and then performs heat exchange on the supply airflow path 5 after heat exchange. is configured to derive to

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

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

First, by operating the heat exchange type ventilator 50 with dehumidification function, the exhaust fan 13 and the supply air fan 16 are driven, and inside the heat exchange type ventilator 10, there is an exhaust flow 2 flowing through the exhaust air passage 4. , and a supply airflow 3 flowing through the supply airflow path 5 is generated.

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

The exhaust air stream 2 and the supply air stream 3 exchange sensible and latent heat inside the heat exchange ventilator 10 . At this time, moisture moves from the hot and humid air supply stream 3 to the exhaust air stream 2, so the moisture in the air supply stream 3 is removed. That is, dehumidification (first dehumidification) of the supplied air flow 3 is performed by total heat exchange inside the heat exchange type ventilator 10 .

Next, the air supply flow 3 after heat exchange is introduced into the dehumidifier 30 and 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 airflow 3a becomes equal to or lower than the dew point temperature, and dew condensation occurs in the first supply airflow 3a, so that moisture in the first supply airflow 3a is removed. That is, dehumidification (second dehumidification) of the first supply airflow 3a is performed by circulating the heat absorber 34 .

In addition, the remaining second supply airflow 3b of the supply airflow 3 introduced into the dehumidifier 30 flows into the second flow path 37 of the heat exchanger 35 and is cooled by the heat absorber 34 in the first flowpath 36. heat exchange with the first supply air flow 3a. As a result, the second supply airflow 3b in the second flow path 37 is cooled and dew condensation occurs, so that moisture in the second supply airflow 3b is removed. That is, by exchanging sensible heat in the heat exchanger 35, the second supply airflow 3b is dehumidified (third dehumidified).

In other words, the heat exchange ventilator 50 with dehumidification function dehumidifies (first to third dehumidification) by each device of the heat exchange ventilator 10, the heat absorber 34, and the heat exchanger 35, and dehumidifies the outdoor high temperature and high humidity. Moisture is removed from the supply air stream 3, ensuring the required amount of dehumidification.

Furthermore, the dehumidifier 30 in the heat exchange ventilator 50 with dehumidification function introduces 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. It has become. In the radiator 32, the amount of heat corresponding to the energy absorbed in the heat absorber 34 and the energy for circulating the refrigerant in the refrigeration cycle in the compressor 31 is exhausted by the introduced exhaust flow 2, and the radiator The exhaust flow 2 that has taken heat from 32 is guided to the exhaust air passage 4 and discharged to the outside as it is. The radiator 32 is thus cooled by the introduced exhaust stream 2 . As a result, the temperature rise of the supply airflow 3 (the first supply airflow 3a and the second supply airflow 3b) due to the flow through the radiator 32 is suppressed.

According to the heat exchange ventilator 50 with a dehumidifying function according to Embodiment 1, the energy required for cooling (exhaust heat) of the radiator 32 in the dehumidifier 30 is (In the summer when dehumidification is required, the temperature of the exhaust air flow 2 is lower than that of the supply air flow 3), so the temperature rise of the dehumidified air (intake air flow 3) can be suppressed. Even when the dehumidifier 30 that combines the refrigeration cycle and the heat exchanger 35 is applied, it is possible to blow the supply air flow in which the temperature rise caused by dehumidification is suppressed. In other words, the heat exchange ventilator 50 with a dehumidification function can be provided, which is capable of blowing the supply air flow in which the temperature rise caused by dehumidification is suppressed.

(Embodiment 2)
A heat exchange ventilator 50a with a dehumidifying function according to Embodiment 2 of the present invention is configured such that a part of the exhaust flow 2 before heat exchange in the heat exchange ventilator 10 is introduced into the dehumidifier 30. It is different from the first embodiment in that Other configurations of the heat exchange ventilator 50a with dehumidification function are the same as those of the heat exchange ventilator 50 with dehumidification function according to the first embodiment. In the following, repetitive explanations of the contents already explained in the first embodiment will be omitted as appropriate, and differences from the first embodiment will be mainly explained.

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 the configuration of a heat exchange ventilator with a dehumidifying function according to Embodiment 2 of the present invention.

As shown in FIG. 4, the heat exchange ventilator 10 is provided with a branch damper 43 that divides the exhaust flow 2 before heat exchange into two air flows (first exhaust flow 2a, second exhaust flow 2b). ing. The first exhaust stream 2 a is the air stream introduced into the heat exchange element 12 and the second exhaust stream 2 b is the air stream introduced into the dehumidifier 30 . The branch damper 43 divides the exhaust flow 2 so that the amount of air flowing through the second exhaust flow 2b is smaller than that of the first exhaust flow 2a.

In the heat exchange type ventilator 10, the first exhaust stream 2a of the divided exhaust stream 2 flows through the heat exchange element 12, and then is discharged to the outside from the exhaust air passage 4 (exhaust port 15 in FIG. 2). . On the other hand, the second exhaust stream 2b flows through the radiator 32 of the dehumidifier 30, and is led to the exhaust air passage 4 after heat exchange. In the present embodiment, the heat exchange ventilator 10 combines the first exhaust stream 2a heat-exchanged by the heat exchange element 12 with the second exhaust stream 2b that has passed through the radiator 32 of the dehumidifier 30. , is configured to discharge outdoors.

According to the heat exchange ventilator 50a with a dehumidifying function according to Embodiment 2, in the summer, the temperature of the exhaust stream 2 before heat exchange (first exhaust stream 2a) is lower than that of the exhaust stream 2 after heat exchange (first exhaust stream 2a). Since the second exhaust stream 2b) is introduced into the dehumidifier 30, the radiator 32 can be cooled more effectively. Therefore, it is possible to further suppress the temperature rise of the dehumidified air (supply airflow 3).

(Embodiment 3)
The heat exchange ventilator 50b with a dehumidification function according to Embodiment 3 of the present invention mixes part of the exhaust flow 2 before heat exchange with the exhaust flow 2 after heat exchange in the heat exchange ventilator 10. In addition, it differs from the first and second embodiments in that it is configured to be introduced into the dehumidifying device 30 . Other configurations of the heat exchange ventilator 50b with a dehumidifying function are the same as those of the heat exchange ventilator 50 with a dehumidification function according to the first embodiment or the heat exchange ventilator 50a with a dehumidification function according to the second embodiment. be. Hereinafter, descriptions of the contents already described in the first and second embodiments will be omitted as appropriate, and differences from the first and second embodiments will be mainly described.

A heat exchange ventilator 50b with a dehumidifying function according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 5 is a schematic diagram showing the configuration of a heat exchange ventilator with a dehumidifying function according to Embodiment 3 of the present invention.

As shown in FIG. 5, the heat exchange ventilator 10 is provided with a switching damper 40 in the exhaust air passage 4 after heat exchange, as in the first embodiment. Further, the heat exchange ventilator 10 is provided with a branch damper 43 that divides the exhaust flow 2 before heat exchange into the first exhaust flow 2a and the second exhaust flow 2b, as in the second embodiment. .

In the heat exchange type ventilator 10, the first exhaust stream 2a of the divided exhaust stream 2 flows through the heat exchange element 12, and then is guided to the dehumidifier 30 via the switching damper 40 of the exhaust air passage 4. . At that time, the second exhaust stream 2b bypassing the heat exchange element 12 is mixed with the first exhaust stream 2a. That is, the dehumidifier 30 is introduced with the exhaust stream 2 in which the first exhaust stream 2a after heat exchange and the second exhaust stream 2b before heat exchange are mixed. The exhaust flow 2 introduced into the dehumidifier 30 flows through the heat radiator 32 and then is led out to the exhaust air passage 4 after heat exchange in the heat exchange type ventilator 10 .

According to the heat exchange ventilator 50b with a dehumidifying function according to Embodiment 3, the second exhaust stream 2b before heat exchange is joined with the first exhaust stream 2a after heat exchange. The air volume of the exhaust stream 2 (mixed exhaust stream) introduced into the dehumidifier 30 can be increased while the temperature is lower than that of the first exhaust stream 2a. Therefore, the radiator 32 can be effectively cooled, and the temperature rise of the dehumidified air (supply airflow) can be suppressed.

(Embodiment 4)
A heat exchange ventilator 50c with a dehumidification function according to Embodiment 4 of the present invention differs from Embodiment 3 in that the radiator and expander that constitute the refrigeration cycle of the dehumidifier 30a have a two-stage configuration. . Other configurations of the heat exchange ventilator 50c with dehumidification function are the same as those of the heat exchange ventilator 50b with dehumidification function according to the third embodiment. In the following, descriptions of the contents already explained in the third embodiment will be omitted as appropriate, and differences from the third embodiment will be mainly explained.

A heat exchange ventilator 50a with a dehumidifying function according to Embodiment 4 of the present invention will be described with reference to FIG. FIG. 6 is a schematic diagram showing the configuration of a heat exchange ventilator with a dehumidifying function according to Embodiment 4 of the present invention.

As shown in FIG. 6, the dehumidifier 30a in the heat exchange ventilator 50c with a dehumidification function has a first radiator 32a as the radiator 32 and a second radiator 32b different from the first radiator 32a. . Moreover, the dehumidifier 30a has, as the expander 33, a first expander 33a and a second expander 33b different from the first expander 33a. A refrigerating cycle in the dehumidifier 30a is configured by connecting the compressor 31, the first radiator 32a, the first expander 33a, the second radiator 32b, the second expander 33b, and the heat absorber 34 in this order. Furthermore, the heat exchanger 35 is arranged between the heat absorber 34 and the second radiator 32b, like the conventional heat exchanger 111 (see FIG. 9).

Unlike the compressor 31 according to the first embodiment, the compressor 31 according to the present embodiment raises the temperature of the refrigerant gas to about 50° C. and introduces it into the first radiator 32a.

The first radiator 32a exchanges heat with the exhaust stream 2 introduced into the dehumidifier 30a (the exhaust stream obtained by mixing the first exhaust stream 2a after heat exchange and the second exhaust stream 2b before heat exchange). It is a device that releases heat to the outside (outside the refrigeration cycle) by In addition, the second radiator 32b transfers heat to the outside (outside the refrigeration cycle) by exchanging heat with the air supply flow 3 (first air supply flow 3a, second air supply flow 3b) introduced into the dehumidifier 30a. It is a device that is released into

Here, the temperature of the refrigerant introduced into the first radiator 32a is adjusted by the compressor 31 so as to be approximately 50°C, and the temperature of the refrigerant introduced into the second radiator 32b is approximately 27°C. is adjusted by the first inflator 33a.

Although the details will be described later, the first expander 33a depressurizes the high-pressure gas-liquid two-phase refrigerant (refrigerant in a state where gas state refrigerant and liquid state refrigerant are mixed) introduced from the first radiator 32a. It is a device that uses a two-phase refrigerant at a predetermined temperature (for example, about 27° C., which is an indoor temperature) and medium pressure. The second expander 33b is a device that decompresses the medium-pressure supercooled liquid refrigerant introduced from the second radiator 32b into a low-temperature/low-pressure gas-liquid two-phase refrigerant.

The first supply airflow 3a introduced into the dehumidifier 30a flows through the heat absorber 34, the first flow path 36 of the heat exchanger 35, and the second radiator 32b in this order, and then is led out to the supply airflow path 5. On the other hand, the second supply airflow 3b introduced into the dehumidifier 30a flows through the second flow path 37 of the heat exchanger 35 and the second radiator 32b in this order, and then is led out to the supply airflow path 5. As shown in FIG. Further, the exhaust stream 2 introduced into the dehumidifier 30a (the exhaust stream obtained by mixing the first exhaust stream 2a after heat exchange and the second exhaust stream 2b before heat exchange) flows through the first radiator 32a, , is led out to the exhaust air passage 4 .

Next, the operation of the refrigerating cycle of the dehumidifier 30a in the heat exchange ventilator 50c with dehumidifying function will be described with reference to FIG. FIG. 7 is a Mollier chart during dehumidification operation of the heat exchange ventilator with dehumidification function according to Embodiment 4 of the present invention. Here, the vertical axis is the pressure of the refrigerant, and the horizontal axis is the specific enthalpy of the refrigerant. Further, the region S1 in FIG. 7 is a superheated steam region (region where the refrigerant exists as superheated steam), the region S2 is a wet steam region (region where the refrigerant exists as wet steam), and the region S3 is a superheated steam region. This is the cooling liquid region (the region where the refrigerant exists as supercooled liquid). Further, the curve S4 in FIG. 7 is defined by a critical point (not shown) between the saturated vapor line (the dividing line between the regions S1 and S2) and the saturated liquid line (the dividing line between the regions S2 and S3). is a constructed curve.

First, as shown in FIG. 7, in the dehumidifier 30a, high-temperature and high-pressure gas refrigerant is discharged from the compressor 31 and flows into the first radiator 32a (point A in FIG. 7).

Then, the gas refrigerant that has flowed into the first radiator 32a exchanges heat with the exhaust flow 2 introduced into the dehumidifier 30a. It condenses into a liquid two-phase refrigerant and flows out of the first radiator 32a (point B in FIG. 7). On the other hand, the exhaust flow 2 whose temperature has been raised by the first heat radiator 32a is guided to the exhaust air passage 4 after heat exchange and discharged to the outdoors.

Then, the gas refrigerant or gas-liquid two-phase refrigerant that has flowed out of the first radiator 32a is decompressed from high pressure to medium pressure by the first expander 33a, and the condensation temperature is lowered to a predetermined temperature (indoor temperature). It flows into the secondary radiator 32b (point C in FIG. 7).

Then, the gas-liquid two-phase refrigerant at a predetermined temperature and medium pressure that has flowed into the second radiator 32b exchanges heat with the dehumidified air supply flow 3 (first air supply flow 3a, second air supply flow 3b). , condenses into a gas-liquid two-phase refrigerant with low dryness or a supercooled liquid refrigerant, and flows out of the second radiator 32b (point D in FIG. 7). On the other hand, the supply airflow 3 introduced into the dehumidifier 30a (especially the first supply airflow 3a that has undergone heat exchange with the heat absorber 34) rises to a predetermined temperature (indoor temperature) by heat exchange with the second radiator 32b. After that, the air is led out to the supply air passage 5 and blown indoors. More precisely, the supply airflow 3 passing through the second radiator 32b has a temperature between the temperature of the supply airflow 3 introduced into the second radiator 32b and the temperature of the refrigerant introduced into the second radiator 32b. and is blown out.

Then, the supercooled liquid refrigerant that has flowed out of the second radiator 32b is decompressed by the second expander 33b, becomes gas-liquid two-phase refrigerant, and flows into the heat absorber 34 (point E in FIG. 7).

The gas-liquid two-phase refrigerant that has flowed into the heat absorber 34 exchanges heat with the first supply air flow 3a before dehumidification, so that the gas-liquid two-phase refrigerant becomes refrigerant with a high degree of dryness or gas refrigerant, and flows out of the heat absorber 34. (Point F in FIG. 7). On the other hand, the first supply airflow 3a cooled by the heat absorber 34 becomes air having a temperature lower than the dew point temperature, so that condensation occurs and the moisture in the first supply airflow 3a can be removed. The gas refrigerant that has flowed out of the heat absorber 34 is sucked into the compressor 31 .

In such a refrigeration cycle, the first expander 33a decompresses the refrigerant to an intermediate pressure, so that the temperature of the supply airflow 3 rising by the second radiator 32b can be adjusted to a predetermined temperature (indoor temperature). . For this reason, the dehumidifier 30a can keep the temperature rise of the supply airflow 3 at a predetermined temperature level even when heat is exchanged between the supply airflow 3 and the second radiator 32b.

A more detailed description will be given. In the radiator 32 of Embodiment 1, the supply air flow 3 flowing through the radiator 32 exchanges heat with the refrigerant (temperature: about 45° C.) introduced into the radiator 32. Therefore, the radiator 32 The supply air flow 3 that has flowed through is heated up to about 45° C. and blown out. On the other hand, in the second radiator 32b of the present embodiment, the supply airflow 3 introduced into the second radiator 32b heats with the refrigerant (temperature: about 27° C.) introduced into the second radiator 32b. Since the replacement is performed, the supply air flow 3 that has flowed through the second radiator 32b is heated up to about 27° C. and blown out. That is, by adjusting the refrigerant temperature to a predetermined temperature (approximately 27° C.) by the first expander 33a, the supply air flow 3 that exchanges heat therewith does not reach a temperature higher than the predetermined temperature (indoor temperature).

Here, in the dehumidifier 30a of the present embodiment, the heat amount corresponding to the energy absorbed by the heat absorber 34 and the energy for circulating the refrigerant in the refrigeration cycle in the compressor 31 by the first radiator 32a is adjusted so that most of the heat is exhausted. This makes it possible to reduce the amount of heat exhausted by the second radiator 32b and lower the temperature of the coolant introduced into the second radiator 32b to about 27.degree.

According to the heat exchange ventilator 50c with a dehumidifying function according to Embodiment 4, the refrigerant in the refrigeration cycle by the first expander 33a (refrigerant introduced from the first radiator 32a cooled by the exhaust flow 2) By reducing the pressure, the temperature of the second radiator 32b can be lowered below the temperature of the first radiator 32a. Temperature rise can be suppressed. In other words, the heat exchange ventilator 50c with a dehumidification function can be provided, which can blow the supply air flow in which the temperature rise caused by the dehumidification is suppressed.

(Embodiment 5)
A heat exchange ventilator 50d with a dehumidifying function according to Embodiment 5 of the present invention differs from Embodiment 1 in that an auxiliary fan 38 is installed between the heat exchanger 35 and the radiator 32 in the dehumidifier 30. different from Other configurations of the heat exchange ventilator 50d with dehumidification function are the same as those of the heat exchange ventilator 50 with dehumidification function according to the first embodiment. In the following, repetitive explanations of the contents already explained in the first embodiment will be omitted as appropriate, and differences from the first embodiment will be mainly explained.

A heat exchange ventilator 50d with a dehumidifying function according to Embodiment 5 of the present invention will be described with reference to FIG. FIG. 8 is a schematic diagram showing the configuration of a heat exchange ventilator with a dehumidifying function according to Embodiment 5 of the present invention.

As shown in FIG. 8, the dehumidifier 30a in the heat exchange ventilator 50d with a dehumidifying function has an auxiliary fan 38 in an air passage communicating between the second passage 37 of the heat exchanger 35 and the radiator 32. is set up. The auxiliary fan 38 is, in addition to the branch damper 42, a device for increasing or decreasing the amount of air flowing through the second flow path 37 (second supply airflow 3b). The auxiliary fan 38 and the branch damper 42 correspond to the "air amount adjusting section" in the claims.

The auxiliary fan 38 has a configuration including blades and a motor for rotating the blades. The auxiliary fan 38 can increase or decrease the volume of the air (the second supply airflow 3b) flowing through the second flow path 37 by controlling the number of rotations of the blades. That is, the auxiliary fan 38 can change the ratio between the air volume of the first supply airflow 3a flowing through the first flow path 36 and the air volume of the second air supply flow 3b flowing through the second flow path 37 .

According to the heat exchange ventilator 50d with a dehumidifying function according to Embodiment 5, the auxiliary fan 38 reduces the air volume of the first supply air flow 3a flowing through the first flow path 36 to the second air flow flowing through the second flow path 37. Since the air volume of the second supply airflow 3b can be easily increased, the temperature of the second supply airflow 3b flowing through the second flow path 37 can be effectively lowered, and the dehumidification effect on the second supply airflow 3b can be improved. can be enhanced.

Although the present invention has been described above based on the embodiments, it should be understood that the present invention is not limited to the above-described embodiments, and that various improvements and modifications are possible without departing from the scope of the present invention. It can be easily guessed. For example, the numerical values given in the above embodiment are examples, and it is naturally possible to employ other numerical values.

In the heat exchange ventilator 50c with a dehumidifying function according to Embodiment 4, the first expander 33a includes, for example, a refrigerant opening/closing means for increasing/decreasing the amount of refrigerant circulation in the refrigeration cycle by opening/closing, and a refrigerant opening/closing means for driving the refrigerant opening/closing means. and driving means. By doing so, by driving the drive means and increasing the opening degree of the refrigerant opening/closing means, the amount of pressure reduction of the refrigerant can be reduced and the temperature of the supplied airflow 3 to be introduced can be increased. On the other hand, by lowering the degree of opening of the refrigerant opening/closing means, the amount of pressure reduction of the refrigerant can be increased, and the temperature of the supplied air flow 3 to be introduced can be lowered. That is, by applying such a first expander 33a, the amount of pressure reduction of the refrigerant can be controlled, so that the temperature (upper limit temperature) after heat exchange in the second radiator 32b can be controlled.

In addition, in the heat exchange ventilator 50c with a dehumidifying function according to Embodiment 4, as shown in FIG. A first temperature sensor 44 that detects the air temperature of, a second temperature sensor 45 that detects the air temperature of the supply airflow 3 after passing through the second radiator 32b, and a first control that controls the first expander 33a (not shown). The first control unit opens and closes the refrigerant opening/closing means of the first expander 33a based on the temperature detected by the first temperature sensor so that the temperature detected by the second temperature sensor 45 falls within a predetermined temperature range. to control the driving means; In particular, when the temperature detected by the second temperature sensor 45 is higher than the temperature detected by the first temperature sensor 44, the first control unit operates the driving means so as to decrease the degree of opening of the refrigerant opening/closing means, The amount of pressure reduction of the refrigerant is increased, and the temperature of the supply air flow 3 is lowered. As a result, the heat exchange ventilator 50c with a dehumidification function can supply the supply air flow 3 having a temperature equivalent to that of the first temperature sensor 44 (the exhaust flow 2 before heat exchange sucked from indoors). .

Furthermore, the control method of the first control unit may be changed to supply the supply air flow 3 having a temperature different from the temperature of the first temperature sensor 44 . In summer, the supply air flow 3 having a temperature lower than the temperature of the first temperature sensor 44 is supplied indoors as long as it does not impair the comfort of the user indoors. Also, in winter, the supply airflow 3 having a temperature higher than the temperature of the first temperature sensor 44 is supplied indoors. As a result, it is possible to supply the airflow 3 having a temperature and humidity comfortable for the user while performing heat exchange ventilation.

Further, in the heat exchange ventilator 50d with a dehumidifying function according to Embodiment 5, as shown in FIG. A second control unit (not shown) for controlling may be provided. The second controller calculates the amount of dehumidification required by the dehumidifier 30 based on the temperature detected by the temperature/humidity sensor 46 . Then, according to the required dehumidification amount, the second control unit sets the air volume ratio of the first supply airflow 3a flowing through the first flow path 36 and the air volume of the second supply airflow 3b flowing through the second flow path 37 to a predetermined value. The auxiliary fan 38 is controlled so that the relationship of As a result, the heat exchange ventilator 50d with a dehumidification function can efficiently dehumidify the second supply airflow 3b flowing through the second flow path 37. As shown in FIG.

Further, in the heat exchange ventilators 50, 50a to 50d with a dehumidifying function according to Embodiments 1 to 5, sensible heat type heat exchange elements are used as the heat exchanger 35, but sensible heat type heat exchange As for the element, it is preferable that the members forming the first channel 36 and the second channel 37 of the heat exchange element have 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 generated inside the heat exchange element can easily flow out of the heat exchange element. It is possible to dehumidify.

The heat exchange ventilator with a dehumidification function according to the present invention can blow a supply air flow in which temperature rise caused by dehumidification is suppressed even when a dehumidifier that combines a refrigeration cycle and a heat exchanger is used. Therefore, it is useful as a heat exchange type ventilator that enables heat exchange between indoors and outdoors.

REFERENCE SIGNS LIST 1 house 2 exhaust flow 2a first exhaust flow 2b second exhaust flow 3 supply air flow 3a first supply air flow 3b second supply air flow 4 exhaust air passage 5 supply air passage 10 heat exchange type ventilator 11 body case 12 heat exchange element 13 Exhaust fan 14 Inside air port 15 Air outlet 16 Air supply fan 17 Outside air port 18 Air supply port 30 Dehumidifier 30a Dehumidifier 31 Compressor 32 Radiator 32a First radiator 32b Second radiator 33 Expander 33a First expander 33b Second expander 34 heat absorber 35 heat exchanger 36 first flow path 37 second flow path 38 auxiliary fan 40 switching damper 41 switching damper 42 branch damper 43 branch damper 44 first temperature sensor 45 second temperature sensor 46 temperature and humidity sensor 50 Heat exchange ventilator with dehumidifying function 50a Heat exchange ventilator with dehumidifying function 50b Heat exchange ventilator with dehumidifying function 50c Heat exchange ventilator with dehumidifying function 50d Heat exchange ventilator with dehumidifying function 100 Dehumidifier 101 Air intake Mouth 102 Body case 103 Dehumidifier 104 Air outlet 105 Compressor 106 Radiator 107 Expander 108 Heat absorber 109 First channel 110 Second channel 111 Heat exchanger

Claims (5)

A dehumidifier connected in communication with an exhaust air passage through which an exhaust flow of a heat exchange type ventilator circulates and a supply air passage through which an intake air flow of the heat exchange type ventilation device circulates,
The dehumidifier includes a refrigeration cycle configured by connecting a compressor, a radiator, an expander, and a heat absorber in this order, and heat exchanged between the air flowing through the first flow path and the air flowing through the second flow path. an exchanger; and
The dehumidifier is configured such that the supply air flow after heat exchange by the heat exchange type ventilation device is introduced from the supply air passage, and the exhaust air flow after heat exchange is introduced from the exhaust air passage. ,
A portion of the supply airflow introduced into the dehumidifier is led out to the supply airflow path after circulating in the order of the heat absorber, the first flow path of the heat exchanger, and the radiator,
The other part of the supplied airflow introduced into the dehumidifier flows through the second flow path of the heat exchanger and the radiator in that order, and then is led out to the supplied airflow path,
A dehumidifying device according to claim 1, wherein the exhaust flow introduced into the dehumidifying device is led out to the exhaust air passage after flowing through the radiator. 2. The dehumidifier according to claim 1, wherein the ratio of the air volume of a part of said supply airflow and the air volume of another part of said supply airflow is controllable. A dehumidifier connected in communication with an exhaust air passage through which an exhaust flow of a heat exchange type ventilator circulates and a supply air passage through which an intake air flow of the heat exchange type ventilation device circulates,
The dehumidifying device is arranged between a refrigerating cycle including a compressor, a radiator, an expander, and a heat absorber, and between the heat absorber and the heat radiator, and is arranged between the air flowing through the first flow path and the second flow path. a heat exchanger that exchanges heat with the air flowing through the flow path,
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 portion of the supply airflow introduced into the dehumidifier is led out to the supply airflow path after circulating in the order of the heat absorber, the first flow path of the heat exchanger, and the radiator,
The other part of the supplied airflow introduced into the dehumidifier flows through the second flow path of the heat exchanger and the radiator in that order, and then is led out to the supplied airflow path,
The exhaust flow introduced into the dehumidifying device is an exhaust flow before heat exchange by the heat exchange type ventilation device, and is led out to the exhaust air passage after flowing through the radiator. Device. A dehumidifier connected in communication with an exhaust air passage through which an exhaust flow of a heat exchange type ventilator circulates and a supply air passage through which an intake air flow of the heat exchange type ventilation device circulates,
The dehumidifying device is arranged between a refrigerating cycle including a compressor, a radiator, an expander, and a heat absorber, and between the heat absorber and the heat radiator, and is arranged between the air flowing through the first flow path and the second flow path. a heat exchanger that exchanges heat with the air flowing through the flow path,
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 portion of the supply airflow introduced into the dehumidifier is led out to the supply airflow path after circulating in the order of the heat absorber, the first flow path of the heat exchanger, and the radiator,
The other part of the supplied airflow introduced into the dehumidifier flows through the second flow path of the heat exchanger and the radiator in that order, and then is led out to the supplied airflow path,
The exhaust flow introduced into the dehumidifier is an exhaust flow in which an exhaust flow before heat exchange by the heat exchange type ventilation device and an exhaust flow after heat exchange are combined, and after circulating through the radiator, A dehumidifying device led to the exhaust air passage. A dehumidifier connected in communication with an exhaust air passage through which an exhaust flow of a heat exchange type ventilator circulates and a supply air passage through which an intake air flow of the heat exchange type ventilation device circulates,
The dehumidifier is connected in order of a compressor, a first radiator, a first expander, a second radiator different from the first radiator, a second expander different from the first expander, and a heat absorber. a refrigeration cycle configured by a heat exchanger disposed between the heat absorber and the second radiator for exchanging heat between the air flowing through the first flow path and the air flowing through the second flow path; including
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 portion of the air supply flow introduced into the dehumidifier flows through the heat absorber, the first flow path of the heat exchanger, and the second radiator in this order, and then is led out to the supply air flow path,
The other part of the supplied airflow introduced into the dehumidifier flows through the second flow path of the heat exchanger and the second radiator in that order, and then is led out to the supplied airflow path,
A dehumidifying device according to claim 1, wherein the exhaust flow introduced into the dehumidifying device is led out to the exhaust air passage after flowing through the first heat radiator.

Images