JP7429835B2 - Heat exchange type ventilation device with humidity control function - Google Patents

Description

The present invention relates to a heat exchange type ventilation device with a humidity control function that performs heat exchange ventilation while controlling humidity in a living space or the like.

BACKGROUND ART Conventionally, a heat exchange type ventilation device that exchanges heat between a supply air flow and an exhaust air flow during ventilation has been known as a device that can perform ventilation without impairing the effectiveness of cooling or heating.

In recent years, due to the effects of global warming and improvements in the airtightness of houses, indoors become cold and dry in the winter, while indoors become hot and humid in the summer, impairing indoor comfort for residents. This is a concern. In either case, indoor humidity control is particularly important in order to improve indoor comfort, so a heat exchange type with a humidity control function (dehumidification/humidification function) that performs heat exchange ventilation while adjusting indoor humidity. Ventilation equipment is required. For this reason, in order to realize the humidification function of the humidity control function, we are proceeding with the development of a heat exchange type ventilation device that applies a liquid atomization device that humidifies by water fragmentation. We are developing a heat exchange ventilation system that uses a dehumidifier that combines a refrigeration cycle and a heat exchanger. As a liquid atomization device that humidifies by water fracturing, for example, a liquid atomization device described in Patent Document 1 is known. Further, as a dehumidifying device that combines a refrigeration cycle and a heat exchanger, for example, a dehumidifying device described in Patent Document 2 is known.

First, a conventional liquid atomization device will be explained using FIG. 9.

As shown in FIG. 9, a conventional liquid atomization device 101 includes a processing chamber 102 through which outside air is passed by a blower, and a water storage section 103 that stores a predetermined amount of water supplied from a water supply pipe. In addition, a mortar-shaped rotating body 104 whose lower part is submerged in the water storage part 103 and whose diameter expands upward, rotates together with the rotating body 104, and water and air scattered by the centrifugal force caused by the rotation of the rotating body 104 can pass through. A cylindrical porous body 105 is provided. Water is sucked up from the water storage section 103 by the centrifugal force caused by the rotation of the rotating body 104, and the water splashed outward from the rotating body 104 collides with the surrounding area through the porous body 105, so that the water is atomized. It has become. As a result, the conventional liquid atomization device 101 humidifies the introduced air.

Next, a conventional dehumidifying device will be described with reference to FIG. 10.

As shown in FIG. 10, the conventional dehumidifier 200 allows air (air The air is blown out of the main case 202. The dehumidifying unit 203 is disposed between a refrigeration cycle in which a compressor 205, a heat radiator 206, an expander 207, and a heat absorber 208 are connected in this order, and between the heat absorber 208 and the heat sink 206. and a heat exchanger 211 that exchanges heat between the air Y flowing through the second flow path 210 and the air Y flowing through the second flow path 210. The air X flowing through the first flow path 209 is cooled by the heat absorber 208 and condensation occurs. The condensed water generated by this dew condensation is collected. On the other hand, the air Y flowing through the second flow path 210 exchanges heat with the air X cooled by the heat absorber 208, is cooled, and dew condensation occurs. The condensed water produced by this condensation is also collected. Thereby, the conventional dehumidifier 200 dehumidifies the introduced air.

Japanese Patent Application Publication No. 2009-279514 International Publication No. 2016/031139

When developing a heat exchange type ventilation device with a humidity control function that incorporates the humidification function of the conventional liquid atomization device 101 and the dehumidification function of the conventional dehumidification device 200 described above, a certain level of humidity control amount ( It is possible to achieve the desired amount (humidification amount, dehumidification amount). However, in the residential environment in Japan, there are large temperature and humidity differences throughout the year, so further improvements in humidity control performance are strongly required in order to improve indoor comfort for residents. In particular, in Japan, where installation space in living spaces is limited, there is a need to improve humidity control performance without increasing the size of heat exchange ventilation devices with humidity control functions.

The present invention has been made to solve the above problems, and provides a heat exchange type ventilation device with a humidity control function that can improve humidity control performance during dehumidification and humidification.

In order to achieve this objective, the heat exchange type ventilation device with a humidity control function according to the present invention has an exhaust flow flowing through an exhaust air passage for discharging indoor air to the outdoors, and an exhaust flow that flows through an exhaust air passage for discharging indoor air to the outdoors, and an exhaust flow that supplies outdoor air to the indoor room. A heat exchange type ventilation device that exchanges heat with the supply air flowing through the supply air duct for ventilation, and a heat exchange type ventilation device that is configured so that the supply air after heat exchange is introduced from the supply air duct, and the introduced supply air and a dehumidifier configured to introduce a heat-exchanged air supply flow from a supply air path and dehumidify the introduced air supply flow. The dehumidifier includes a refrigerant cycle that includes a compressor, a heat radiator, an expander, a heat absorber, and a four-way valve, and is placed downstream of the heat absorber, and connects air flowing through a first flow path and a second flow path. It includes a heat exchanger that exchanges heat with the flowing air. The dehumidifier has two dehumidifying modes: a four-way valve that dehumidifies the supply air flow with the refrigerant flow in the refrigerant cycle in the first direction, and a four-way valve that dehumidifies the refrigerant flow in the refrigerant cycle in the opposite direction from the first direction. The second direction is a heating mode in which the supply air flow is heated. A part of the air supply flow introduced into the dehumidifier is led out to the air supply air passage after passing through the first flow path of the heat absorber and the heat exchanger, and the other part of the air supply flow introduced into the dehumidification apparatus is After flowing through the second flow path of the heat exchanger, it is led out to the supply air path. The exhaust flow introduced into the dehumidifier is led out to the exhaust air path after passing through the radiator. It includes an air path switching section installed in the air supply air path after heat exchange. The air path switching unit is configured to switch between a state in which the air supply flow after heat exchange flows through the dehumidifier in the heating mode, is introduced into the humidifier, and is supplied into the room, and a state in which the air supply flow after heat exchange flows through the dehumidifier. There are two states in which the air is introduced into the humidifier without being introduced into the humidifier and the air is supplied into the room.The other is where the air supply after heat exchange flows through the dehumidifier in dehumidification mode and is supplied into the room without being introduced into the humidifier. It is configured to be able to switch between a state in which the air supply flow after replacement is supplied into the room without passing through the dehumidifier and the humidifier.

According to the present invention, it is possible to provide a heat exchange type ventilation device with a humidity control function that can improve humidity control performance during dehumidification and humidification.

FIG. 1 is a schematic diagram showing how a heat exchange type ventilation device according to a prerequisite example of the present invention is installed in a house. FIG. 2 is a schematic diagram showing the configuration of a heat exchange type ventilation device according to a prerequisite example of the present invention. FIG. 3 is a schematic diagram showing the configuration of a heat exchange type ventilation device with a humidity control function according to Embodiment 1 of the present invention. FIG. 4 is a schematic diagram showing the configuration of a dehumidifying device in a dehumidifying mode in a heat exchange type ventilation device with a humidity control function. FIG. 5 is a schematic diagram showing the configuration of a dehumidifier in a heating mode in a heat exchange type ventilation device with a humidity control function. FIG. 6 is a schematic diagram showing the configuration of a liquid atomization device in a heat exchange type ventilation device with a humidity control function. FIG. 7 is a schematic diagram showing the configuration of a heat exchange type ventilation device with a humidity control function according to Embodiment 2 of the present invention. FIG. 8 is a schematic diagram showing the configuration of a heat exchange type ventilation device with a humidity control function according to Embodiment 8 of the present invention. FIG. 9 is a schematic cross-sectional view showing the configuration of a conventional liquid atomization device. FIG. 10 is a schematic cross-sectional view showing the configuration of a conventional dehumidifying device.

The heat exchange type ventilation device with a humidity control function according to the present invention has an exhaust flow flowing through an exhaust air passage for discharging indoor air to the outdoors, and an air supply air passage for supplying outdoor air into the indoor room. A heat exchange type ventilation device that exchanges heat with the circulating supply air flow, and a humidifier that is configured so that the supply air flow after heat exchange is introduced from the supply air path and humidifies the introduced supply air flow. and a dehumidifier configured to introduce the air supply flow after heat exchange from the air supply air passage, and dehumidifying the introduced air supply flow. The dehumidifier includes a refrigerant cycle that includes a compressor, a heat radiator, an expander, a heat absorber, and a four-way valve, and is placed downstream of the heat absorber, and connects air flowing through a first flow path and a second flow path. It includes a heat exchanger that exchanges heat with the flowing air. The dehumidifier has two dehumidifying modes: a four-way valve that dehumidifies the supply air flow with the refrigerant flow in the refrigerant cycle in the first direction, and a four-way valve that dehumidifies the refrigerant flow in the refrigerant cycle in the opposite direction from the first direction. The second direction is a heating mode in which the supply air flow is heated. A part of the air supply flow introduced into the dehumidifier is led out to the air supply air passage after passing through the first flow path of the heat absorber and the heat exchanger, and the other part of the air supply flow introduced into the dehumidification apparatus is After flowing through the second flow path of the heat exchanger, it is led out to the supply air path. The exhaust flow introduced into the dehumidifier is led out to the exhaust air path after passing through the radiator. In the dehumidification mode, the air supply flow led out from the dehumidifier to the air supply air path is supplied into the room without being humidified by the humidifier, and in the heating mode, it is humidified by the humidifier and then supplied into the room.

According to such a configuration, it becomes possible to easily heat the supply air flow introduced into the humidifier by switching the four-way valve of the dehumidifier, and it is possible to increase the amount of humidification of the supply air flow flowing through the humidifier. In other words, it is possible to provide a heat exchange type ventilation device with a humidity control function that can improve humidity control performance during dehumidification and humidification.

Moreover, the heat exchange type ventilation device with a humidity control function according to the present invention further includes an air path switching section installed in the air supply air path after heat exchange. The air path switching unit has two states: one in which the supply air flow after heat exchange is introduced into the humidifier after passing through the dehumidifier, and the other in which the supply air flow after heat exchange is introduced into the humidifier without passing through the dehumidifier. It is configured to be able to switch between the states. According to this configuration, when heating the air supply flow introduced into the humidifier is not required, the air path switching section can easily control the air supply flow to a state in which it does not flow to the dehumidifier. The increase in pressure loss caused by the device is suppressed, and energy-saving operation can be realized.

Furthermore, in the heat exchange type ventilation device with a humidity control function according to the present invention, the dehumidification device further includes a water spraying section that sprays water onto the radiator. In the dehumidification mode, the exhaust flow introduced into the dehumidification device flows through the radiator on which water is sprayed by the water spray section, and then is led out to the exhaust air path. According to this configuration, in the dehumidification mode, the energy required for cooling (exhaust heat) of the radiator in the dehumidifier is generated by the air heat of the exhaust flow from the heat exchange type ventilation device and the heat of vaporization of the blown water. Therefore, the radiator can be effectively cooled. Therefore, it is possible to increase the amount of moisture removed from the air supply flowing through the dehumidifier. In other words, it is possible to provide a heat exchange type ventilation device with a humidity control function that can improve humidity control performance during dehumidification and humidification.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. Note that the following embodiments are examples of embodying the present invention, and do not limit the technical scope of the present invention. In addition, throughout all the drawings, the same parts are given the same reference numerals and their explanations are omitted. Further, in order to avoid duplication of details of each part that is not directly related to the present invention, explanations for each drawing are omitted.

Embodiments of the present invention will be described below with reference to the drawings.

(Prerequisite example)
First, with reference to FIGS. 1 and 2, a heat exchange type ventilation system that is a prerequisite example of an embodiment of the present invention will be described. FIG. 1 is a schematic diagram showing how a heat exchange type ventilation device according to a prerequisite example of the present invention is installed in a house. FIG. 2 is a schematic diagram showing the configuration of a heat exchange type ventilation device according to a prerequisite example of the present invention.

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

As shown in FIG. 1, the exhaust stream 2 is discharged outdoors through a heat exchange type ventilation device 10, as indicated by the black arrow. Exhaust flow 2 is a flow of air exhausted from indoors to outdoors. Further, the air supply flow 3 is taken into the room via the heat exchange type ventilation device 10 as indicated by the white arrow. The air supply flow 3 is a flow of air taken indoors from outdoors. For example, in winter in Japan, the temperature of the exhaust air stream 2 is 20 to 25°C, while the temperature of the air supply air stream 3 can reach below freezing. The heat exchange type ventilation device 10 performs ventilation, and during this ventilation, transfers the heat of the exhaust air flow 2 to the supply air flow 3, thereby suppressing the release of unnecessary heat.

As shown in FIG. 2, the heat exchange type ventilation device 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 air vent. It has an air passage 4 and an air supply air passage 5. The main body case 11 is an outer frame of the heat exchange type ventilation device 10. An internal air port 14, an exhaust port 15, an external air port 17, and an air supply port 18 are formed on the outer periphery of the main body case 11. The internal air port 14 is a suction port that draws the exhaust stream 2 into the heat exchange type ventilation device 10 . The exhaust port 15 is a discharge port that discharges the exhaust flow 2 from the heat exchange type ventilation device 10 to the outdoors. The outside air port 17 is a suction port that draws the supply air flow 3 into the heat exchange type ventilation device 10 . The air supply port 18 is a discharge port that discharges the air supply flow 3 from the heat exchange type ventilation device 10 indoors.

Inside the main body case 11, a heat exchange element 12, an exhaust fan 13, and an air supply fan 16 are attached. Further, inside the main body case 11, an exhaust air passage 4 and an air supply air passage 5 are configured. The heat exchange element 12 is a member for performing heat exchange (sensible heat and latent heat) between the exhaust air flow 2 flowing through the exhaust air path 4 and the supply air flow 3 flowing through the air supply air path 5. The exhaust fan 13 is a blower that sucks the exhaust flow 2 through the internal air port 14 and discharges it from the exhaust port 15. The air supply fan 16 is a blower that sucks in the air supply flow 3 from the outside air port 17 and discharges it from the air supply port 18 . The exhaust air passage 4 is an air passage that communicates the inside air port 14 and the exhaust port 15. The air supply path 5 is an air path that communicates the outside air port 17 and the air supply port 18. The exhaust flow 2 sucked in by the exhaust fan 13 passes through the heat exchange element 12 in the exhaust air path 4 and the exhaust fan 13, and is discharged outdoors from the exhaust port 15. Further, the air supply flow 3 sucked in by the air supply fan 16 passes through the heat exchange element 12 in the air supply air path 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 ventilation device 10 operates the exhaust fan 13 and the air supply fan 16 of the heat exchange element 12, and the exhaust air flow 2 flowing through the exhaust air passage 4 in the heat exchange element 12 and the exhaust air flow 2 are operated. , and the supply air flow 3 flowing through the supply air passage 5 . As a result, when performing ventilation, the heat exchange type ventilation device 10 transfers the heat of the exhaust air flow 2 released outdoors to the air supply flow 3 taken indoors, suppresses unnecessary heat release, and heats the room indoors. Collect. As a result, in the winter, when performing ventilation, it is possible to suppress a decrease in indoor temperature by using the cooler outdoor air. On the other hand, in the summer, when performing ventilation, the increase in indoor temperature can be suppressed by the use of high-temperature outdoor air.

(Embodiment 1)
Next, with reference to FIG. 3, a heat exchange type ventilation device with a humidity control function (dehumidification/humidification function) according to the first embodiment will be described. FIG. 3 is a schematic diagram showing the configuration of a heat exchange type ventilation device with a humidity control function according to Embodiment 1 of the present invention. In addition, in each schematic diagram after FIG. 3, the exhaust air path 4 and the air supply air path 5 are also expressed as the flow of the exhaust air flow 2 and the air supply air flow 3 (black arrows) in the heat exchange type ventilation device 10. There is.

First, the flow of air (exhaust air flow 2, supply air flow 3) in the heat exchange type ventilation device with humidity control function 50 will be explained. In the following description, the airflow (exhaust air flow 2, supply air flow 3) or air path (exhaust air path 4, supply air path 5) after heat exchange passes through the heat exchange element 12 in the heat exchange type ventilation device 10. The air flow or air path before heat exchange is shown as the air flow or air path after heat exchange, and the air flow or air path before heat exchange is shown as the air flow or air path before passing through the heat exchange element 12.

As shown in FIG. 3, the heat exchange type ventilation device 50 with a humidity control function according to the first embodiment is a dehumidification device as a means for imparting a dehumidification function to the heat exchange type ventilation device 10 according to the prerequisite example. 30 and a liquid atomization device 60 as means for imparting a humidifying function. Note that the liquid atomization device 60 corresponds to a "humidifying device" in the claims.

As shown in FIG. 3, in the heat exchange type ventilation system 10, a switching damper 40 is installed in the exhaust air passage 4 after heat exchange, and a switching damper 41 and a switching damper 43 are installed in the supply air passage 5 after heat exchange. is installed. The switching damper 40 is a damper for switching between a state in which the exhaust air flow 2 flowing through the exhaust air path 4 is caused to flow outdoors and a state in which the exhaust air flow 2 flowing in the exhaust air path 4 is caused to flow into the dehumidifier 30. Further, the switching damper 41 is a damper for switching between a state in which the air supply flow 3 flowing through the air supply air path 5 is caused to flow indoors and a state in which the air supply flow 3 flowing through the air supply air path 5 is caused to flow into the dehumidifier 30. . Further, the switching damper 43 is provided downstream of the switching damper 41 (on the indoor side of the air supply air path 5), and allows the air supply flow 3 flowing through the air supply air path 5 to flow indoors, and the state where the air supply air flow 3 flowing through the air supply air path 5 is caused to flow indoors. This is a damper for switching between the state in which the air supply flow 3 flows to the liquid atomization device 60. Note that the air supply flow 3 that has passed through the dehumidifier 30 is configured to be led out to the air supply air path 5 on the upstream side (the heat exchange element 12 side) of the switching damper 43. Here, the switching damper 40, the switching damper 41, and the switching damper 43 correspond to the "air path switching section" in the claims.

In the heat exchange type ventilation device 50 with a humidity control function, by switching each switching damper (switching damper 40, switching damper 41, switching damper 43), (A) the supply air flow 3 after heat exchange is A state where air is supplied indoors without passing through the liquid atomization device 60; (B) state where the air supply flow 3 after heat exchange flows through the dehumidification device 30 and then supplied indoors without passing through the liquid atomization device 60; (C) State C where the air supply flow 3 after heat exchange flows through the liquid atomization device 60 without passing through the dehumidifier 30 and is supplied indoors; (D) After heat exchange The air supply flow 3 flows through the dehumidifying device 30, and then flows through the liquid atomization device 60 to supply air into the room.

In state A, when there is no need for dehumidification, the air supply flow 3 that has undergone heat exchange by the heat exchange type ventilation device 10 is directly supplied indoors.

In state B, in a case such as summer when dehumidification is necessary, dehumidification is performed on the supply air flow 3 after heat exchange, and then the dehumidified supply air flow 3 is supplied indoors.

In state C, when humidification is necessary, such as during winter, humidification is performed on the supply air flow 3 after heat exchange, and then the humidified supply air flow 3 is supplied indoors.

In state D, when a greater amount of humidification is required than in state C, the supply air flow 3 after heat exchange is heated, humidification is performed on the heated supply air flow 3, and then the humidified supply air flow 3 is is supplied indoors.

As described above, the heat exchange type ventilation device 50 with a humidity control function switches the flow of the air supply flow 3 between the A state and the D state, so that the air supply flow 3 is supplied indoors with the humidity controlled to an appropriate level. is configured to be The details of the dehumidification and humidification operations will be described later, but when there is no need for dehumidification and humidification, by setting the state to A, the increase in pressure loss caused by the dehumidification device 30 and the liquid atomization device 60 can be avoided. As the heat exchange type ventilation device 50 with a humidity control function, it is possible to realize energy-saving operation throughout the year.

Next, the dehumidifying device 30 in the heat exchange type ventilation device 50 with a humidity control function will be explained with reference to FIGS. 3 to 5. FIG. 4 is a schematic diagram showing the configuration of a dehumidifying device in a dehumidifying mode in a heat exchange type ventilation device with a humidity control function. FIG. 5 is a schematic diagram showing the configuration of a dehumidifier in a heating mode in a heat exchange type ventilation device with a humidity control function.

The dehumidifier 30 is a unit for dehumidifying or heating the supply air flow 3 after heat exchange in the heat exchange type ventilation device 10. As shown in FIG. 3, the dehumidification device 30 includes a refrigerant cycle including a compressor 31, a four-way valve 31a, a radiator 32, an expander 33, and a heat absorber 34, and a heat exchanger 35. There is. The refrigerant cycle of this embodiment is configured by connecting a compressor 31 (+four-way valve 31a), a radiator 32, an expander 33, and a heat absorber 34 in an annular shape in this order. For example, a fluorocarbon substitute (HFC134a) is used as a refrigerant in the refrigerant cycle. Copper tubes are often used to connect the various devices that make up the refrigeration cycle, and are connected by welding.

The four-way valve 31a is a device (reversible valve) for switching the flow direction of the refrigerant flowing within the refrigerant cycle. Specifically, the four-way valve 31a connects the compressor 31, the heat radiator 32, the expander 33, and the heat absorber 34 in this order in a first direction (see FIG. 4) in which the refrigerant flows; 34, the expander 33, and the radiator 32 are switched to the second direction (see FIG. 5) in which the refrigerant flows in this order. The first direction and the second direction are opposite directions in which the refrigerant flows.

The refrigerant cycle is divided into a dehumidification mode state (see FIG. 5) in which the refrigerant flows in a first direction by the four-way valve 31a to dehumidify the supply air flow 3 (see FIG. 5), and a state in which the refrigerant flows in the second direction by the four-way valve 31a. It has a heating mode state (see FIG. 6) in which the supply air flow 3 is heated. Note that the heat radiator 32 and the heat absorber 34 have names corresponding to their functions in the dehumidification mode, but in the following description, the same names will be used in the heating mode as well.

<Dehumidification mode>
In the dehumidification mode, as shown in FIG. 4, the refrigerant flows through the compressor 31, the radiator 32, the expander 33, and the heat absorber 34 in this order (first direction) by the four-way valve 31a.

The compressor 31 is a device that compresses low-temperature, low-pressure refrigerant gas (working medium gas) in the refrigerant cycle, increases the pressure, and raises 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 refrigerant cycle) by exchanging heat between the refrigerant gas that has become high temperature and high pressure by the compressor 31 and air (exhaust flow 2). At this time, the refrigerant gas is condensed and liquefied under high pressure. In the radiator 32, the temperature of the refrigerant gas introduced (about 45° C.) is higher than the temperature of the air, so when heat is exchanged, the temperature of the air is raised and the refrigerant gas is cooled. Note that the radiator 32 is also referred to as a condenser.

The expander 33 is a device that reduces the pressure of the high-pressure refrigerant liquefied by the radiator 32 and returns it to the original low-temperature, low-pressure liquid. Note that the expander 33 is also referred to as an expansion valve.

The heat absorber 34 is a device in which the refrigerant that has passed through the expander 33 removes heat from the air and evaporates, turning the liquid refrigerant into a low-temperature, low-pressure refrigerant gas. In the heat absorber 34, the temperature of the refrigerant introduced is lower than the temperature of the air, so when heat is exchanged, the air is cooled and the temperature of the refrigerant is raised. Note that the heat absorber 34 is also referred to as an evaporator.

<Heating mode>
In the heating mode, as shown in FIG. 5, the refrigerant flows through the compressor 31, the heat absorber 34, the expander 33, and the radiator 32 in this order (second direction) by the four-way valve 31a.

As in the dehumidification mode, the compressor 31 compresses the low-temperature, low-pressure refrigerant gas (working medium gas) in the refrigerant cycle, increases the pressure, and raises the temperature.

The heat absorber 34 is a device that performs the same function as the heat radiator 32 in the dehumidification mode. Specifically, the heat absorber 34 transfers heat to the outside (outside the refrigerant cycle) by exchanging heat between the refrigerant gas that has become high temperature and high pressure by the compressor 31 and air (first air supply flow 3a described later). ). At this time, the refrigerant gas is condensed and liquefied under high pressure. In the heat absorber 34, the temperature of the refrigerant gas introduced (approximately 45° C.) is higher than the temperature of the air, so when heat is exchanged, the temperature of the air is raised and the refrigerant gas is cooled.

The expander 33 reduces the pressure of the high-pressure refrigerant liquefied by the heat absorber 34 and returns it to the original low-temperature, low-pressure liquid.

The heat radiator 32 is a device that performs the same function as the heat absorber 34 in the dehumidification mode. Specifically, in the radiator 32, the refrigerant that has passed through the expander 33 removes heat from the air and evaporates, turning the liquid refrigerant into a low-temperature, low-pressure refrigerant gas. In the radiator 32, the temperature of the refrigerant introduced is lower than the temperature of the air, so when heat is exchanged, the air is cooled and the temperature of the refrigerant is raised.

Further, the heat exchanger 35 is a heat exchanger equipped with a sensible heat exchange element. The heat exchanger 35 is arranged in the space downstream of the heat absorber 34 (between the heat absorber 34 and the heat radiator 32), like the heat exchanger 211 (see FIG. 9) in the conventional dehumidification device 200. The inside of 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 this first flow path 36. The first flow path 36 is a flow path that leads the air introduced from the heat absorber 34 to the air supply air path 5 without passing through the heat radiator 32. The second flow path 37 is a flow path that leads the air introduced from the heat exchange type ventilation device 10 to the air supply air path 5 without passing through 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.

Subsequently, the flow of airflow (exhaust airflow 2, supply airflow 3) in the dehumidifier 30 will be explained.

As shown in FIG. 3, the dehumidifier 30 includes a branch damper 42 that divides the heat-exchanged air supply flow 3 introduced into the dehumidifier 30 into two air flows (a first air supply flow 3a and a second air supply flow 3b). is set up. The first air supply flow 3a is an air flow that is introduced into the heat absorber 34 and flows through the first flow path 36, and the second air supply flow 3b is an air flow that is introduced into the heat exchanger 35 and flows through the second flow path 37. be. The branch damper 42 is configured to vary the ratio of the air volume of the first air supply flow 3a to the air volume of the second air supply flow 3b. In other words, the branch damper 42 can easily increase or decrease the ratio of the first air supply flow 3a to the second air supply flow 3b by adjusting the angle of the damper (the branching ratio of the air supply flow 3 after heat exchange). It has become. Here, the first air supply flow 3a corresponds to "a part of the air supply flow introduced into the dehumidifying device" in the claims, and the second air supply flow 3b corresponds to "a portion of the air supply flow introduced into the dehumidification device" in the claims. corresponds to ``part''.

In the dehumidifier 30, the first air supply flow 3a among the divided air supply flows 3 flows through the heat absorber 34, the first flow path 36 of the heat exchanger 35, and the radiator 32 (in the first direction) in that order (in the first direction). After heat exchange in the exchange type ventilation device 10, the air is led out to the supply air path 5. On the other hand, the second air supply flow 3b flows through the second flow path 37 of the heat exchanger 35 and the radiator 32 (second direction), and then is led out to the air supply air path 5 after heat exchange. In the present embodiment, the dehumidifier 30 merges the first air supply flow 3a that has passed through the heat exchanger 35 and the second air supply flow 3b that has passed through the heat exchanger 35, and then connects the air supply air path after heat exchange. 5. As a result, the temperature of the air supply flow 3 blown into the room is adjusted. A method for adjusting the temperature of the supply air flow 3 blown into the room will be described later.

On the other hand, the exhaust air flow 2 introduced into the dehumidification device 30 passes through the radiator 32 and is then led out to the exhaust air path 4 after heat exchange in the heat exchange type ventilation device 10 . That is, in this embodiment, the dehumidifier 30 is configured so that the radiator 32 is cooled by the exhaust flow 2 introduced from the heat exchange type ventilation device 10.

Next, the dehumidifying operation (dehumidifying mode) and heating operation (heating mode) of the dehumidifying device 30 will be explained.

<Dehumidification mode>
First, by operating the heat exchange type ventilation device 50 with a humidity control function, each switching damper is switched so that the airflow is in state B. Then, the exhaust fan 13 and the air supply fan 16 are driven, and an exhaust air flow 2 that flows through the exhaust air path 4 and an air supply flow 3 that flows through the air supply air path 5 are generated inside the heat exchange type ventilation device 10. .

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

Sensible heat and latent heat are exchanged between the exhaust air flow 2 and the supply air flow 3 inside the heat exchange type ventilation device 10. At this time, since moisture moves from the hot and humid supply air stream 3 to the exhaust stream 2, the moisture in the supply air stream 3 is removed. That is, the supply air flow 3 is dehumidified (first dehumidification) by total heat exchange inside the heat exchange type ventilation device 10.

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

In addition, the remaining second air supply flow 3b of the air supply flow 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 flow path 36. Heat is exchanged with the first air supply flow 3a. As a result, the second air supply flow 3b in the second flow path 37 is cooled and dew condenses, so that moisture in the second air supply flow 3b is removed. That is, by exchanging sensible heat with the heat exchanger 35, the second air supply flow 3b is dehumidified (third dehumidification).

In other words, the heat exchange type ventilation device 50 with a humidity control function removes moisture from the high temperature and humidity outdoors by dehumidifying the heat exchange type ventilation device 10, the heat absorber 34, and the heat exchanger 35 (first dehumidification to third dehumidification). Moisture is removed from the air supply flow 3, and at this time, the necessary amount of dehumidification is ensured.

Further, the dehumidifying device 30 in the heat exchange type ventilation device 50 with a humidity control function introduces the exhaust flow 2 from the exhaust air passage 4 of the heat exchange type ventilation device 10, and the introduced exhaust flow 2 flows through the radiator 32. The structure is as follows. In the radiator 32, an amount of heat corresponding to the energy absorbed in the heat absorber 34 and the energy for circulating the refrigerant in the refrigerant cycle in the compressor 31 is exhausted by the introduced exhaust flow 2, and the amount of heat is exhausted from the radiator 32. The exhaust flow 2 that has taken heat from the exhaust gas flow path 32 is led out to the exhaust air path 4 and is discharged outdoors as it is. That is, the heat radiator 32 is cooled by the introduced exhaust flow 2. As a result, the temperature rise in the air supply flow 3 (first air supply flow 3a, second air supply flow 3b) caused by flowing through the radiator 32 is suppressed.

<Heating mode>
First, by operating the heat exchange type ventilation device 50 with a humidity control function, each switching damper is switched so that the airflow is in the D state. Then, the exhaust fan 13 and the air supply fan 16 are driven, and an exhaust air flow 2 that flows through the exhaust air path 4 and an air supply flow 3 that flows through the air supply air path 5 are generated inside the heat exchange type ventilation device 10. .

For example, in winter, the exhaust air flow 2 is indoor air that has been conditioned to a comfortable temperature and humidity by an air conditioner, and the supply air flow 3 is outdoor air that is low and dry.

Sensible heat and latent heat are exchanged between the exhaust air flow 2 and the supply air flow 3 inside the heat exchange type ventilation device 10. At this time, although moisture moves from the exhaust air flow 2 to the low-temperature dry air supply flow 3, the supply air flow 3 is not sufficiently humidified.

The supply air stream 3 after heat exchange is then introduced into a dehumidifier 30 and heated. Specifically, the first air supply flow 3 a of the air supply flows 3 introduced into the dehumidifier 30 is heated by the heat absorber 34 . In addition, the remaining second air supply flow 3b of the air supply flow 3 introduced into the dehumidifier 30 flows into the second flow path 37 of the heat exchanger 35, and is heated by the heat absorber 34 in the first flow path 36. Heat is exchanged with the first supply air flow 3a. Thereafter, by flowing through the radiator 32, the temperature of the supply air flow 3 (first supply air flow 3a, second supply air flow 3b) led out from the heat exchanger 35 decreases, but The temperature of the air supply flow 3 rises higher than the temperature of the air supply flow 3, and the temperature of the air supply flow 3 is led out to the air supply air path 5.

In the radiator 32 , the introduced exhaust flow 2 absorbs heat equivalent to the energy radiated in the heat absorber 34 and the energy for circulating the refrigerant in the refrigerant cycle in the compressor 31 . The exhaust flow 2 which has been given heat is led out to an exhaust air passage 4 and is discharged outdoors as it is.

Next, a method for adjusting the temperature of the air supply flow 3 in the dehumidifier 30 will be described.

As shown in FIG. 3, the heat exchange type ventilation device 50 with a humidity control function includes a first temperature sensor that detects the air temperature of the exhaust stream 2 before heat exchange in connection with controlling the branching ratio of the branching damper 42. 45, and a second temperature sensor 46 that detects the air temperature of the supply air flow 3 (mixed air flow of the first supply air flow 3a and the second supply air flow 3b) after flowing through the heat absorber 34 of the dehumidification device 30 and merging. It has a control section (not shown) that controls the branch damper 42.

The control unit adjusts the branching ratio of the branching damper 42 based on the temperature detected by the first temperature sensor 45, and controls the branching 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 controls the air volume of the first air supply flow 3a relative to the air volume of the second air supply flow 3b. is increased and the temperature of the supply air stream 3 after dehumidification is decreased. 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 control unit reduces the air volume of the first air supply flow 3a relative to the air volume of the second air supply flow 3b. , increasing the temperature of the supply air stream 3. As a result, the heat exchange type ventilation device 50 with a humidity control function can supply the air supply flow 3 having the same temperature as the first temperature sensor 45 (exhaust flow 2 taken in from indoors before heat exchange). Become.

Next, the liquid atomization device 60 in the heat exchange type ventilation device 50 with a humidity control function will be described with reference to FIG. 6. FIG. 6 is a schematic diagram showing the configuration of a liquid atomization device in a heat exchange type ventilation device with a humidity control function.

The liquid atomization device 60 is a humidification device that atomizes water and blows out the atomized water so as to be included in the inhaled air.

As shown in FIG. 6, the liquid atomization device 60 includes an inlet 62, an outlet 63, an inner cylinder 64, an outer cylinder 68, and a water receiver 71.

The suction port 62 is an opening for sucking air into the liquid atomization device 60, and is provided on the side surface of the liquid atomization device 60. Further, the suction port 62 has a shape (for example, cylindrical shape) to which a duct can be connected, and is connected to the air supply air passage 5 after heat exchange via the switching damper 43 (see FIG. 3).

The blowout port 63 is an opening for blowing out the air that has passed through the inside of the liquid atomization device 60, and is provided on the upper surface of the liquid atomization device 60. Further, the air outlet 63 is formed in a region partitioned by the inner cylinder 64 and the outer cylinder 68 (the region between the inner cylinder 64 and the outer cylinder 68). The outlet 63 is provided around the inner cylinder 64 on the upper surface of the liquid atomization device 60. Furthermore, the blower outlet 63 is provided so as to be located above the suction port 62. Moreover, the air outlet 63 has a shape to which a cylindrical duct can be connected, and is connected to the air supply air path 5 after heat exchange (see FIG. 3).

The air sucked in from the suction port 62 is turned into humidified air by a liquid atomization means 77, which will be described later, and is blown out from the blowout port 63.

The inner cylinder 64 is arranged near the center inside the liquid atomization device 60 . Further, the inner cylinder 64 has a ventilation port 67 that opens downward in a substantially vertical direction, and is formed in a hollow cylindrical shape.

The outer cylinder 68 is formed into a cylindrical shape and is arranged to enclose the inner cylinder 64. Further, a side wall 68a of the outer cylinder 68 is provided with a water supply port 72 for supplying water to a water storage section 70, which will be described later. The water supply port 72 is connected to the water supply and drainage pipe 39 via the first water passage 44a. Note that the water supply port 72 is provided at a position vertically above the upper surface of the water storage section 70 (the surface of the maximum water level that can be stored in the water storage section 70: the water surface 80).

The water receiving portion 71 is provided over the entire bottom of the liquid atomization device 60 . The water receiver 71 can temporarily store water leaking from the device, for example, when water leaks due to an abnormality in the device.

Next, the internal structure of the liquid atomization device 60 will be explained.

As shown in FIG. 6, the liquid atomization device 60 includes a suction communication air passage 65, an inner cylinder air passage 66, an outer cylinder air passage 69, a water storage section 70, and a liquid atomization means 77. , and a water receiving portion 71.

The suction communication air passage 65 is a duct-shaped air passage that communicates the suction port 62 and the inner cylinder 64 (inner cylinder air passage 66), and the air sucked from the suction port 62 passes through the suction communication air passage 65. The structure is such that it reaches the inside of the inner cylinder 64.

The inner cylinder air passage 66 is an air passage provided inside the inner cylinder 64 , and is an air passage provided inside the inner cylinder 64 . It communicates with a tube air passage 69 (air passage indicated by a broken line arrow in FIG. 6). In the inner cylinder air passage 66, a liquid atomization means 77 is arranged within the air passage.

The outer cylinder air passage 69 is an air passage formed between the inner cylinder 64 and the outer cylinder 68, and communicates with the air outlet 63.

The water storage section 70 is provided at the lower part of the liquid atomization device 60 (lower part of the inner cylinder 64) and stores water. The water storage part 70 is formed in a substantially mortar shape, and the side wall of the water storage part 70 is connected to and integrated with the lower end of the outer cylinder 68. The water storage section 70 has a structure in which water is supplied from a water supply port 72 provided on the side wall 68a of the outer cylinder 68, and water is discharged from a drain port 73 provided on the bottom surface of the water storage section 70. Here, like the water supply port 72, the drain port 73 is connected to the water supply and drainage pipe 39 via another first water passage 44a. Note that the drain port 73 is preferably provided at the lowest position on the bottom surface of the water storage section 70.

The liquid atomization means 77 is a main part of the liquid atomization device 60, and is a part that atomizes water. Specifically, the liquid atomization means 77 includes a pumping pipe (suction pipe) 74, a rotating plate 75, and a motor 76. Further, the liquid atomization means 77 is provided inside the inner cylinder 64 , that is, at a position covered by the inner cylinder 64 .

The water lift pipe 74 sucks up water from the water storage section 70 by rotation. Further, the water pumping pipe 74 is formed in a hollow truncated conical shape, and is provided so that the tip on the smaller diameter side is below the water level 80 of the water stored in the water storage section 70 .

The rotary plate 75 is formed in a donut-like disk shape with an open center, and is arranged around the larger diameter side of the water lift pipe 74, in other words, around the upper part of the water lift pipe 74. A plurality of openings (not shown) are provided on the side of the water pumping pipe 74 with a larger diameter, so that the sucked up water passes through the openings and is supplied to the rotary plate 75. The rotating plate 75 releases the water sucked up by the water pump 74 in the direction of the rotating surface.

The motor 76 rotates the water pump 74 and the rotating plate 75.

The water receiving portion 71 is provided vertically below the water storage portion 70 over the entire bottom of the liquid atomization device 60 .

Next, the operation of the liquid atomization device 60 will be explained using FIG. 6.

First, the humidifying operation of the liquid atomization device 60 will be briefly explained. First, water is supplied from the water supply port 72 to the water storage section 70 through the water supply and drainage pipe 39 connected to a water supply facility (not shown), and the water is stored in the water storage section 70 . The air sucked into the liquid atomization device 60 from the suction port 62 (the air supply flow 3 after heat exchange or the air supply flow 3 heated by the dehumidifier 30) is transferred to the suction communication air path 65, the inner tube air path 66, the liquid atomization means 77, and the outer cylinder air passage 69, and is blown out from the outlet 63 toward the outside (for example, indoors). At this time, the water droplets generated by the liquid atomization means 77 come into contact with the air passing through the inner tube air passage 66, and the water droplets are vaporized, thereby humidifying the air. Furthermore, the water stored in the water storage section 70 is discharged from the apparatus through the drain port 73 after a predetermined period of time has elapsed.

Next, the humidifying operation of the liquid atomization device 60, that is, how the liquid atomization device 60 humidifies air will be described in more detail.

Air that passes through the suction communication air passage 65 from the suction port 62 and is taken into the inner cylinder of the inner cylinder air passage 66 passes through the liquid atomization means 77 . When the water pump 74 and the rotary plate 75 are rotated by the operation of the motor 76, the water stored in the water storage section 70 rises along the inner wall surface of the water pump 74 due to the rotation. The rising water is stretched along the surface of the rotary plate 75 and discharged as fine water droplets from the outer peripheral end of the rotary plate 75 toward the rotating surface. The ejected water droplets collide with the inner wall surface of the inner cylinder 64 and are crushed to become even finer water droplets. The water droplets discharged from the rotary plate 75 and the water droplets that collide with the inner wall surface of the inner cylinder 64 and are broken come into contact with the air passing through the inner cylinder 64, and the water droplets are vaporized to humidify the air. Note that some of the generated water droplets do not vaporize, but since the liquid atomization means 77 is arranged so as to be covered by the inner cylinder 64, the water droplets that are not vaporized adhere to the inner surface of the inner cylinder 64 and are stored. 70.

The air containing water droplets (humidified air) is blown out from the ventilation port 67 provided at the lower end of the inner cylinder 64 toward the water storage section 70 provided below. The air then flows toward an outer cylinder air passage 69 formed between the inner cylinder 64 and the outer cylinder 68. Here, since the air passing through the outer cylinder air passage 69 is blown upward in the vertical direction, the air blowing direction changes to be opposite to the air flowing downward within the inner cylinder air passage 66.

At this time, the water droplets blown out along with the air from the ventilation port 67 cannot follow the flow of air due to their inertia, and adhere to the water surface 80 of the water storage section 70 or the inner wall surface of the outer cylinder 68. The larger the weight of the water droplet, the greater this effect, that is, the larger the diameter of the water droplet that is difficult to vaporize, the greater the effect, so that large water droplets can be separated from the flowing air.

The air flowing into the outer cylinder air passage 69 from the inner cylinder air passage 66 through the ventilation opening 67 flows upward through the outer cylinder air passage 69. The air is then blown out from the air outlet 63 to the outside. At this time, some of the water droplets fall into the water storage section 70 due to gravity, or adhere to the outer wall of the inner tube 64 or the inner wall of the outer tube 68. Water droplets adhering to the outer wall of the inner cylinder 64 and the inner wall of the outer cylinder 68 fall to the water storage portion 70 along the outer wall surface of the inner cylinder 64 and the inner wall surface of the outer cylinder 68.

As described above, the liquid atomization device 60 can humidify air (the introduced air supply flow 3) by the liquid atomization means 77. In other words, when the supply air flow 3 is in state C, the liquid atomization device 60 humidifies the supply air flow 3 after heat exchange, whereas when the supply air flow 3 is in state D, it is heated by the dehumidifier 30. Humidification is performed on the supplied air flow 3.

As described above, according to the heat exchange type ventilation device 50 with a humidity control function according to the first embodiment, the following effects can be enjoyed.

(1) In the dehumidification mode, the air supply flow 3 led out from the dehumidification device 30 to the air supply air path 5 bypasses the liquid atomization device 60 and is supplied into the room, and in the heating mode, it flows through the liquid atomization device 60. It was designed so that air was supplied into the room. With this configuration, it becomes possible to easily heat the supply air flow 3 introduced into the liquid atomization device 60 by switching the four-way valve 31a of the dehumidification device 30, and the supply air flow flowing through the liquid atomization device 60 can be easily heated. It is possible to increase the amount of humidification to 3. In other words, the heat exchange type ventilation device 50 with a humidity control function can improve the humidity control performance during dehumidification and humidification.

In addition, in the dehumidification mode, the air supply flow 3 led out from the dehumidification device 30 to the air supply air path 5 is supplied into the room without being humidified by the liquid atomization device 60, and in the heating mode, it is supplied into the room without being humidified by the liquid atomization device 60. It can also be said that air is humidified by the air filter 60 and supplied into the room.

(2) In the heat exchange type ventilation device 50 with a humidity control function, each switching damper (switching damper 40, switching damper 41, switching damper 43) is provided in the air supply air path 5 after heat exchange, and the air supply flow 3 after heat exchange is A state where the air flows through the dehumidifier 30 and is introduced into the liquid atomizer 60 (state D), and a state where the air supply flow 3 after heat exchange is introduced into the liquid atomizer 60 without passing through the dehumidifier 30. (C state). With this configuration, the heat exchange type ventilation device 50 with a humidity control function can control the air supply flow to the dehumidifier 30 by each switching damper when heating the air supply flow 3 introduced into the liquid atomization device 60 is not necessary. 3 can be easily controlled to a state where it does not flow, and during humidification, an increase in pressure loss caused by the dehumidifier 30 can be suppressed, and energy-saving operation can be realized.

(3) The conventional dehumidifier 200 is configured to allow dehumidified air to pass through the radiator 206 in order to cool the radiator 206 of the refrigeration cycle. In the heat radiator 206, in addition to the energy absorbed by the heat absorber 208, energy for circulating the refrigerant in the refrigeration cycle is exhausted by the compressor 205, so the temperature of the air after dehumidification passing through the heat radiator 206 decreases. will rise above the temperature of the air before dehumidification. As a result, when the dehumidifying mechanism of the conventional dehumidifier 200 is placed in the supply air path of a heat exchange type ventilation device to dehumidify, the air after dehumidification (air whose temperature has increased) is blown directly into the room as a supply air flow. , the problem arises that indoor comfort is impaired.

On the other hand, in the heat exchange type ventilation device 50 with a humidity control function, in the dehumidification mode, the exhaust air flow 2 introduced into the dehumidification device 30 is guided to the exhaust air path 4 after passing through the radiator 32. And so. With this configuration, the heat exchange type ventilation device 50 with a humidity control function uses the energy necessary for cooling (exhaust heat) of the radiator 32 in the dehumidification device 30 from the exhaust flow 2 from the heat exchange type ventilation device 10. (During the summer when dehumidification is required, the exhaust air flow 2 has a lower temperature than the air supply flow 3), so it is possible to suppress the temperature rise of the air after dehumidification (the air supply flow 3). Even when the configuration of the conventional dehumidification device 200 is applied to a heat exchange type ventilation device, it is possible to send a supply air flow in which a temperature rise caused by dehumidification is suppressed. In other words, the heat exchange type ventilation device 50 with a humidity control function can blow a supply air flow in which a temperature rise caused by dehumidification is suppressed.

(4) In the heat exchange type ventilation device 50 with a humidity control function, the four-way valve 31a is used to switch the flow direction of the refrigerant in the refrigerant cycle of the dehumidifier 30, and the functions of the radiator 32 and the heat absorber 34 are reversed. . With this configuration, the dehumidifying device 30 can switch between a dehumidifying mode in which the air introduced into the device can be dehumidified and a heating mode in which the air introduced into the device can be heated. becomes possible. In other words, the dehumidifier 30 makes it possible to heat the supply air flow 3, and there is no need to additionally install a heating means such as a heater inside the liquid atomization device 60. Heating can be achieved at low cost.

(Embodiment 2)
The heat exchange type ventilation device 50a with a humidity control function according to the second embodiment of the present invention has the following features: a water spraying section 38 that sprays water on the radiator 32 in the dehumidifier 30a is configured; This embodiment differs from the first embodiment in that the supply air flow 3 that has passed through the heat exchanger 35 is led out to the supply air path without passing through the heat absorber 34 . The other configuration of the heat exchange type ventilation device with humidity control function 50a is the same as that of the heat exchange type ventilation device with humidity control function 50 according to the first embodiment. Hereinafter, the content already explained in Embodiment 1 will be omitted from being explained again, and the points different from Embodiment 1 will be mainly explained.

A heat exchange type ventilation device 50a with a humidity control function according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 7 is a schematic diagram showing the configuration of a heat exchange type ventilation device with a humidity control function according to Embodiment 2 of the present invention.

As shown in FIG. 7, the dehumidifying device 30a in the heat exchange type ventilation device 50a with a humidity control function includes a water spraying section 38 that sprays water onto the radiator 32, and a water spraying section 38 that supplies water to the water spraying section 38. Additionally, a water supply and drainage pipe 39 is provided for draining excess water generated when spraying onto the radiator 32.

In the dehumidifying device 30a, the radiator 32 constituting the refrigerant cycle is entirely disposed within the exhaust air path 4, and the other devices (compressor 31, expander 33, heat absorber 34, heat exchanger 35) is arranged outside the exhaust air passage 4.

The water spraying section 38 has a water nozzle, and sprays water in the form of a mist onto the radiator 32 from the water nozzle within the exhaust air path 4 . The sprayed water adheres to the surface of the heat radiating pipe and the like that constitute the radiator 32 and is vaporized by the heat of the radiator 32. Then, the vaporized water is led out to the exhaust air passage 4 by the exhaust flow 2 flowing through the radiator 32, and is discharged outdoors as it is.

The water supply and drainage pipe 39 has one end connected to the water spraying section 38 via an opening/closing means such as a solenoid valve, and the other end connected to the water supply equipment and drainage equipment of the residential facility. The water supply and drainage pipe 39 supplies water to the water spray section 38 and drains excess water generated when spraying onto the radiator 32.

The water supply and drainage pipe 39 also includes a water channel switching unit for switching between a first state in which water is introduced from the outside into the liquid atomization device 60 and a second state in which water is introduced from the outside into the dehumidification device 30a. 44 are provided.

The waterway switching unit 44 communicates with the liquid atomization device 60 via the water supply and drainage pipe 39 (first waterway 44a) when the air supply flow is in state B, and communicates with the dehumidifier 30a when the air supply flow is in state C or D. It is configured to communicate with the water supply and drainage pipe 39 (second water passage 44b). In other words, the water channel switching unit 44 performs humidification processing on the air supply flow 3 after heat exchange (state C, state D), and dehumidification processing on the air supply flow 3 after heat exchange (state B). The flow of water in the water supply and drainage pipe 39 is changed depending on the situation.

Next, the flow of airflow (exhaust air flow 2, supply air flow 3) in the dehumidifier 30a will be explained.

In the dehumidification mode, the heat exchanger 35 in the dehumidifier 30a allows the first air supply flow 3a led out from the first flow path 36 to be led out to the air supply air path 5 without passing through the radiator 32, and the second flow The second supply air flow 3b introduced from the passage 37 is configured to be led out to the supply air passage 5 without passing through the radiator 32.

On the other hand, the exhaust air flow 2 introduced into the dehumidifier 30a, like the dehumidifier 30, passes through the radiator 32 and then is led out to the exhaust air path 4 after heat exchange in the heat exchange type ventilation device 10. Specifically, the exhaust air flow 2 introduced into the dehumidification device 30a flows through the radiator 32 on which water is sprayed by the water spray unit 38, and then passes through the exhaust air path after heat exchange in the heat exchange type ventilation device 10. 4 and discharged outdoors as is. That is, in the present embodiment, the dehumidifier 30a is configured such that the radiator 32 is cooled by the air heat of the exhaust stream 2 introduced from the heat exchange type ventilation device 10 and the heat of vaporization of the blown water. has been done.

As described above, according to the heat exchange type ventilation device 50a with a humidity control function according to the second embodiment, the following effects can be enjoyed.

(5) In the heat exchange type ventilation device 50a with a humidity control function, the exhaust air flow 2 introduced into the dehumidification device 30a flows through the radiator 32 on which water is sprayed by the water spraying section 38, and then passes through the exhaust air path. The configuration is derived from 4. With this configuration, in the dehumidification mode, the energy required for cooling (exhaust heat) of the radiator 32 in the dehumidifier 30a is combined with the air heat of the exhaust flow 2 from the heat exchange type ventilation device 10 and the blown air. Since the heat of vaporization of water can be obtained, the radiator 32 can be effectively cooled. Therefore, the amount of dehumidification from the supply air flow 3 flowing through the dehumidifier 30a can be increased. In other words, the heat exchange type ventilation device 50a with a humidity control function can improve the humidity control performance during dehumidification and humidification.

(6) The heat exchange type ventilation device 50a with a humidity control function converts the energy necessary for cooling (exhaust heat) of the radiator 32 in the dehumidification device 30a into the air heat of the exhaust flow 2 from the heat exchange type ventilation device 10. Since the heat of vaporization of the water sprayed by the water spraying section 38 can be obtained, the radiator 32 can be effectively cooled, and the dehumidified air (supply air flow 3) is distributed to the radiator 32. It is possible to blow out into the room without causing any problems. In other words, even when the configuration of the conventional dehumidifier 200 is applied to a heat exchange type ventilation device, it is possible to send a supply air flow in which a temperature rise caused by dehumidification is suppressed.

(7) In the heat exchange type ventilation device 50a with a humidity control function, water from the outside introduced into the liquid atomization device 60 for humidification is easily switched to be introduced into the dehumidification device 30a by the water channel switching unit 44. be able to. In other words, when water is supplied to the dehumidifier 30a, the water supply from the outside can be shared with the liquid atomization device 60. Water spraying treatment can be achieved at low cost.

(Embodiment 3)
In the heat exchange type ventilation device 50b with a humidity control function according to the third embodiment of the present invention, the air supply flow 3 after heat exchange by the heat exchange type ventilation device 10a flows through the dehumidification device 30 and the liquid atomization device 60 in this order. This embodiment differs from the first embodiment in that it is configured so that air is supplied into the room. The other configuration of the heat exchange type ventilation device with humidity control function 50b is the same as that of the heat exchange type ventilation device with humidity control function 50 according to the first embodiment. Hereinafter, the content already explained in Embodiment 1 will be omitted from being explained again, and the points different from Embodiment 1 will be mainly explained.

A heat exchange type ventilation device 50b with a humidity control function according to Embodiment 3 of the present invention will be described with reference to FIG. 8. FIG. 8 is a schematic diagram showing the configuration of a heat exchange type ventilation device with a humidity control function according to Embodiment 3 of the present invention.

As shown in FIG. 8, in the heat exchange type ventilation device 50b with a humidity control function, the supply air flow 3 after heat exchange by the heat exchange type ventilation device 10a flows through the dehumidification device 30, and the supply air flow 3 that has passed through the dehumidification device 30 flows through the dehumidification device 30. The airflow 3 flows through the liquid atomization device 60 . Thereafter, the air supply flow 3 that has passed through the liquid atomization device 60 is supplied into the room. The heat exchange type ventilation device 50b with a humidity control function controls the operation of the dehumidifier 30 and the liquid atomization device 60 to control each state (E state to H state) corresponding to the A state to D state. It is now possible to Each state will be explained below.

In state E, the air supply flow 3 after heat exchange flows through the dehumidifier 30 and the liquid atomizer 60 without being subjected to dehumidification (dehumidification by the dehumidifier 30, humidification by the liquid atomizer 60), and is indoors. This is a state in which air is supplied to the vehicle, and corresponds to state A.

In the F state, the air supply flow 3 after heat exchange is dehumidified by the dehumidifying device 30 in the dehumidifying mode, and then flows through the liquid atomizing device 60 without being humidified by the liquid atomizing device 60, and is indoors. This state corresponds to state B.

The G state is a state in which the air supply flow 3 after heat exchange flows through the dehumidifier 30 without being dehumidified or heated by the dehumidifier 30, is humidified by the liquid atomization device 60, and is supplied indoors. This corresponds to state C.

In the H state, the air supply flow 3 after heat exchange is heated in the heating mode by the dehumidifier 30, then humidified by the liquid atomization device 60, and air is supplied indoors, and in the D state corresponds to

As described above, the heat exchange type ventilation device 50b with a humidity control function switches the flow of the air supply flow 3 from the E state to the H state, so that the air supply flow 3 is supplied indoors with the humidity controlled to an appropriate level. is configured to be

As mentioned above, according to the heat exchange type ventilation device 50b with a humidity control function according to the third embodiment, the following effects can be enjoyed.

(8) In the dehumidification mode, the air supply flow 3 led out from the dehumidification device 30 to the air supply air path 5 is supplied into the room without being humidified by the liquid atomization device 60, and in the heating mode, it is supplied into the room by the liquid atomization device 60. Humidified air is supplied into the room. Therefore, it is possible to enjoy the same effect as in (1) above.

(9) In the heat exchange type ventilation device 50b with a humidity control function, each state (E state ~G state). With this configuration, the risk of malfunctions caused by each switching damper is reduced, and the cost of the device can be reduced by reducing the number of members.

Although the present invention has been described above based on the embodiments, 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. This can be easily inferred. For example, the numerical values listed in the above embodiment are merely examples, and it is of course possible to employ other numerical values.

In the heat exchange type ventilation device 50 with a humidity control function according to the first embodiment, a sensible heat type heat exchange element is used as the heat exchanger 35. It is preferable that the members constituting the twelve first channels 36 and second channels 37 have water repellency (hydrophobicity). As the water-repellent (hydrophobic) member, for example, a resin member such as polypropylene or polystyrene is used. By doing so, the condensed water generated inside the heat exchange element 12 easily flows out of the heat exchange element 12, so that the heat exchange efficiency of the heat exchanger 35 due to the condensed water is reduced. This makes it possible to dehumidify the air.

Further, in the heat exchange type ventilation device 50 with a humidity control function according to the first embodiment, during humidification, the air supply flow 3 is introduced into the liquid atomization device 60 by flowing through the dehumidification device 30 in the heating mode. Although the temperature of the air (supply air flow 3 after heat exchange) is increased, the present invention is not limited to this. For example, if it is winter and there is no need for humidification, each switching damper may be controlled so that the air supply flow 3 heated by the dehumidifier 30 is directly supplied indoors. By doing so, warm air can be blown into the room, making it possible to reduce the load on heating (air conditioning/floor heating). Furthermore, if the air supply stream 3 heated by the dehumidifier 30 is ventilated during the drying process of the liquid atomization device 60, not only can the drying time of the device be shortened, but also mold can be prevented in the device. It is also possible to suppress the occurrence.

The heat exchange type ventilation device with a humidity control function according to the present invention makes it possible to improve the humidity control performance during dehumidification and humidification, so it is a heat exchange type ventilation device that enables heat exchange between indoors and outdoors. It is useful as

1 House 2 Exhaust flow 3 Air supply flow 3a First air supply flow 3b Second air supply flow 4 Exhaust air path 5 Air supply air path 10 Heat exchange type ventilation device 10a Heat exchange type ventilation device 11 Main body case 12 Heat exchange element 13 Exhaust fan 14 Internal air Port 15 Exhaust port 16 Air supply fan 17 Outside air port 18 Air supply port 30 Dehumidifier 30a Dehumidifier 31 Compressor 31a Four-way valve 32 Heat radiator 33 Expander 34 Heat absorber 35 Heat exchanger 36 First flow path 37 Second flow path 38 Water spray section 39 Water supply/drainage pipe 40 Switching damper 41 Switching damper 42 Branch damper 43 Switching damper 44 Channel switching section 44a First water channel 44b Second water channel 45 First temperature sensor 46 Second temperature sensor 50 Heat exchange type with humidity control function Ventilation device 50a Heat exchange type ventilation device with humidity control function 50b Heat exchange type ventilation device with humidity control function 60 Liquid atomization device 62 Suction port 63 Air outlet 64 Inner cylinder 65 Suction communication air path 66 Inner cylinder air path 67 Ventilation port 68 Outer tube 68a Side wall 69 Outer tube air passage 70 Water storage section 71 Water receiving section 72 Water supply port 73 Drain port 74 Lifting pipe 75 Rotating plate 76 Motor 77 Liquid atomization means 80 Water surface 101 Liquid atomization device 102 Processing chamber 103 Water storage section 104 Rotation Body 105 Porous body 200 Dehumidifier 201 Air suction port 202 Main body case 203 Dehumidification section 204 Air outlet 205 Compressor 206 Heat radiator 207 Expander 208 Heat absorber 209 First channel 210 Second channel 211 Heat exchanger

Claims (2)

Heat exchange type ventilation that exchanges heat between the exhaust air flowing through the exhaust air duct for discharging indoor air to the outdoors and the supply air flowing through the air supply air duct for supplying outdoor air into the room. a device;
a humidifier configured to introduce the air supply flow after heat exchange from the air supply air path, and humidify the introduced air supply flow;
A heat exchange type ventilation device with a humidity control function, comprising: a dehumidifier configured to introduce the air supply flow after heat exchange from the air supply air path, and dehumidifying the introduced air supply flow. hand,
The dehumidification device includes a refrigerant cycle including a compressor, a heat radiator, an expander, a heat absorber, and a four-way valve, and is arranged downstream of the heat absorber, and is configured to separate air flowing through a first flow path and a second flow. a heat exchanger that exchanges heat with the air flowing through the passage,
The dehumidification device has a dehumidification mode in which the supply air flow is dehumidified with the four-way valve directing the refrigerant flow in the refrigerant cycle in the first direction, and a dehumidification mode in which the four-way valve dehumidifies the refrigerant flow in the refrigerant cycle in the first direction. a heating mode in which the supply air flow is heated in a second direction opposite to the one direction;
A portion of the supply air flow introduced into the dehumidification device flows through the first flow path of the heat absorber and the heat exchanger, and then is led out to the supply air path, and a portion of the supply air flow introduced into the dehumidification device flows through the first flow path of the heat absorber and the heat exchanger. The other part of the supply air flow is led out to the supply air passage after passing through the second flow path of the heat exchanger,
The exhaust flow introduced into the dehumidifier is led out to the exhaust air path after passing through the radiator,
comprising an air path switching unit installed in the air supply air path after heat exchange,
The air path switching unit is configured to switch between a state in which the air supply flow after heat exchange flows through the dehumidifier in the heating mode, is introduced into the humidifier, and is supplied into the room, and a state in which the air supply flow after heat exchange flows through the dehumidifier and is introduced into the humidifier. A state in which the airflow does not flow through the dehumidification device and is introduced into the humidification device and is supplied into the room; and a state in which the airflow after heat exchange flows through the dehumidification device in the dehumidification mode and is supplied to the humidification device. It is configured to be able to switch between a state in which air is supplied into the room without being introduced, and a state in which the air supply after heat exchange is supplied into the room without flowing through the dehumidifier and the humidifier. A heat exchange type ventilation device with a humidity control function. The dehumidification device further includes a water spraying section that sprays water onto the radiator,
In the dehumidification mode, the exhaust flow introduced into the dehumidification device is characterized by flowing through the radiator on which water is sprayed by the water spraying section, and then being led out to the exhaust air path. The heat exchange type ventilation device with a humidity control function according to claim 1.

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