JP2021143797A - Ventilation device - Google Patents

Abstract

To suppress overheating of a semiconductor element for inverter control of an operation of a compressor in a ventilation device having a compressor type dehumidification function.SOLUTION: A ventilation device includes: a ventilation air course 10; a heat exchanger 19 exchanging heat between air flowing in the ventilation air course 10 and a refrigerant in a refrigeration cycle to cool the air; a compressor 20 circulating the refrigerant in the heat exchanger 19; a semiconductor element 30 for driving the compressor 20; and a heat sink 31 comprising a heat absorbing part 32 absorbing heat emitted by the semiconductor element 30 and a heat radiating part 33 radiating the absorbed heat. In the heat sink 31, the heat radiating part 33 is disposed on a space side to which air is conveyed in the ventilation air course 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to a ventilation system.

In recent years, with the aim of reducing heat loss due to ventilation during heating and cooling by improving the airtightness and heat insulation of houses, ventilation devices equipped with heat exchange elements for heat exchange between the supply air flow and the exhaust flow have been introduced. Are known. Further, a ventilation device equipped with a humidifying function is also known because it is easy to control humidity, which is one of the parameters indicating comfort, due to the high airtightness and high heat insulation of the house (for example, Patent Document 1). reference).

Hereinafter, the ventilation device equipped with the humidifying function will be described with reference to FIG.

As shown in FIG. 4, the ventilation device includes a humidification unit 101 and a ventilation unit 102. The humidifying unit 101 includes an outside air port 103, an exhaust port 104, a ring air port 105, an air supply port 106, an air supply adapter 107, a top panel 108, and a humidifying portion 109.

The blower unit 102 includes an air supply blower 110, an exhaust blower 111, and a heat exchange element 112.

The humidification unit 101 is provided above the blower unit 102. On the top surface of the humidifying unit 101, an outside air port 103, an exhaust port 104, a ring air port 105, an air supply port 106, an air supply adapter 107, and a top surface panel 108 are provided.

The humidifying portion 109 is provided in the center of the humidifying unit 101, and an air supply adapter 107 and an air supply port 106 are provided on the top surface of the humidifying portion 109.

The air supply adapter 107 includes a plurality of air supply ports 106.

The air supply port 106 is connected to a duct (not shown) and supplies air into the room through the duct.

The humidifying portion 109 is located inside the humidifying unit 101 so as not to interfere with each air passage. The air supply adapter 107 is connected to the humidifying unit 109. The air humidified by the humidifying section 109 is supplied to the room through the air supply port 106.

The heat exchange element 112 is provided inside the blower unit 102, and supplies the heat amount of the exhausted air to the supplied air, or supplies the heat amount of the supplied air to the heat amount of the exhausted air. It has a heat exchange function.

The humidifying unit 101 and the blowing unit 102 form a supply air passage 113 and an exhaust air passage 114 as ventilation passages. The air passing through the air supply air passage 113 enters the inside of the humidifying unit 101 through the outside air port 103, enters the blowing unit 102 connected to the humidifying unit 101, passes through the inside of the heat exchange element 112, and passes through the inside of the heat exchange element 112, and enters the exhaust air passage. After exchanging heat with the air of 114, it passed through the air supply blower 110, entered the humidifying unit 101 again from the blower unit 102, entered the humidifying section 109 inside the humidifying unit 101, and was humidified by the humidifying section 109. After that, it is blown out from the air supply port 106. In this way, the air after passing through the heat exchange element 112 can be humidified more efficiently by humidifying the air in the humidifying section 109.

The air passing through the exhaust air passage 114 enters the inside of the humidifying unit 101 through the ring port 105, passes through the inside of the humidifying unit 101, enters the blowing unit 102 connected to the humidifying unit 101, and enters the heat exchange element. After passing through the inside of 112 and exchanging heat with the air in the air supply air passage 113, it passes through the exhaust blower 111, enters the humidifying unit 101 again from the blower unit 102, and is blown out from the exhaust port 104 to the outside. ..

Japanese Unexamined Patent Publication No. 2019-135420

A ventilator equipped with such a humidifying function may have a insufficient indoor dehumidifying capacity in the middle season or in the summer when the indoor humidity is higher than in the winter. Therefore, for example, a method of increasing the dehumidifying capacity in summer or the like by equipping the ventilation device with a compressor-type dehumidifying function using an inverter can be considered.

An inverter refers to a power supply circuit that converts direct current to alternating current, or a device equipped with that circuit. The inverter can generate alternating current of various frequencies. Therefore, the inverter is used in various fields such as motor rotation speed control and compressor operation control in the refrigeration cycle.

In order to drive an inverter, a semiconductor element called an intelligent power module (IPM) is required. The IPM generates a large amount of heat when it is driven. Therefore, if the dehumidifying operation is performed in an environment where the IPM is exposed to a high temperature such as in summer, the dehumidifying capacity may be lowered due to overheating of the IPM, or the IPM may break down and the dehumidifying operation may not be possible.

Therefore, an object of the present invention is to provide a ventilator equipped with a dehumidifying function by a compressor using inverter control, which suppresses overheating of semiconductor elements for inverter control and can obtain a stable dehumidifying capacity. ..

Then, in order to achieve this object, the ventilation device according to the present invention is a heat exchanger that cools the air by heat exchange between the ventilation air passage and the air passing through the ventilation air passage and the refrigerant of the refrigeration cycle. With a compressor that circulates the refrigerant in the heat exchanger, a semiconductor element for driving the compressor, a heat absorbing unit that absorbs heat generated by the semiconductor element, and a heat radiating unit that dissipates the absorbed heat. The heat sink is provided with a heat sink to be configured, and the heat radiating portion is arranged on the space side where the air is conveyed in the ventilation air passage, thereby achieving the intended purpose.

According to the present invention, it is possible to obtain a ventilation device having a stable dehumidifying ability by suppressing overheating of the semiconductor element.

External perspective view of the ventilation system Top side sectional view of the dehumidifying part (A) Enlarged sectional view showing the arrangement of the heat sink and the semiconductor element (b) External perspective view of the heat sink Configuration diagram showing the prior art

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

The ventilation device according to the present invention is installed on a wall surface or the like indoors, and has an air supply function for transporting outdoor air indoors and an exhaust function for transporting indoor air outdoors. Further, the ventilation device has a heat exchange function for exchanging heat between the air passing through the air supply air passage and the air passing through the exhaust air passage, and a dehumidifying function for dehumidifying or humidifying the air passing through the air supply air passage. Be prepared.

An outline of the configuration of the ventilation device 1 will be described with reference to FIG. FIG. 1 is an external perspective view of the ventilation device 1.

The ventilation device 1 includes an outdoor side air supply port 2, an air supply duct 3, an indoor side exhaust port 4, an outdoor side exhaust port 5, a humidifying part 6, a dehumidifying part 7, a heat exchange part 8, and an upper surface. The outer shell 9 and the ventilation air passage 10 are provided.

The outdoor side air supply port 2 is a suction port for sucking outdoor air into the ventilation device 1. The outdoor side air supply port 2 is connected to a duct (not shown) to communicate with the outside.

The air supply duct 3 is a duct for transporting the air sucked into the ventilation device 1 from the outdoor side air supply port 2 to the humidifying unit 6.

The indoor side exhaust port 4 is a suction port for sucking indoor air into the ventilation device 1. The indoor exhaust port 4 is connected to a duct (not shown) to communicate with an indoor living space such as a living room.

The outdoor side exhaust port 5 is an outlet for blowing out the air sucked into the ventilation device 1 from the indoor side exhaust port 4 to the outside. The outdoor side exhaust port 5 is connected to a duct (not shown) to communicate with the outdoors.

The humidifying section 6 humidifies the air blown out from the air supply duct 3. The humidifying unit 6 atomizes (atomicizes) water droplets by a centrifugal crushing method, and humidifies air with the finely divided water particles. The humidifying portion 6 is arranged above the dehumidifying portion 7. The humidifying section 6 includes an indoor air supply port 11.

The indoor air supply port 11 is an outlet for blowing out the air conveyed from the air supply duct 3 indoors. The indoor air supply port 11 connects to a duct (not shown) and communicates with an indoor living space such as a living room.

The dehumidifying unit 7 dehumidifies the air from the outdoor side air supply port 2 to the indoor side air supply port 11 by an inverter-controlled compressor method. The dehumidifying unit 7 is arranged above the heat exchange unit 8. The configuration of the dehumidifying unit 7 will be described later.

The heat exchange unit 8 uses a total heat exchange type or a sensible heat exchange type to supply airflow from the outdoor side air supply port 2 to the indoor side air supply port 11 and exhaust air from the indoor side exhaust port 4 to the outdoor side exhaust port 5. Exchanges heat energy with the flow. The heat exchange unit 8 includes a heat exchange element 12 and a filter 15. The heat exchange element 12 exchanges heat between the supply air flow and the exhaust flow. The filter 15 collects foreign substances such as dust and insects contained in the air supply from the outdoor side air supply port 2 to the indoor side air supply port 11.

The upper surface outer shell 9 is a sheet metal member that covers the upper surface of the dehumidifying portion 7. The upper surface outer shell 9 is formed by machining a metal plate material such as a galvanized steel plate. The upper surface outer shell 9 is connected to the outdoor side air supply port 2, the air supply duct 3, the indoor side exhaust port 4, the outdoor side exhaust port 5, and the humidifying portion 6. Further, the upper surface outer shell 9 is provided with an air supply opening (not shown). The air supply opening communicates with the humidifying portion 6 via the air supply duct 3.

The ventilation air passage 10 is an air transport passage for supplying air to the indoor space and exhausting air from the indoor space. The ventilation air passage 10 includes an air supply air passage 13 and an exhaust air passage 14.

The air supply air passage 13 is an air passage for transporting outdoor air indoors. The air supply air passage 13 is formed by using the outdoor side air supply port 2, the dehumidifying unit 7, the heat exchange unit 8, the air supply duct 3, and the humidifying unit 6. The air sucked into the dehumidifying section 7 from the outdoor side air supply port 2 enters the dehumidifying section 7 again via the heat exchange section 8 and is conveyed to the humidifying section 6 via the air supply duct 3 to supply air to the indoor side. Blow out from mouth 11.

The exhaust air passage 14 is an air passage for transporting indoor air to the outside. The exhaust air passage 14 is formed by using the indoor side exhaust port 4, the dehumidifying part 7, the heat exchange part 8, and the outdoor side exhaust port 5. The air sucked into the dehumidifying section 7 from the indoor side exhaust port 4 enters the dehumidifying section 7 again via the heat exchange section 8 and is blown out from the outdoor side exhaust port 5.

The above is the outline of the configuration of the ventilation device 1.

Next, the configuration of the dehumidifying unit 7 will be described with reference to FIGS. 2 and 3. FIG. 2 is a cross-sectional view of the upper surface of the dehumidifying portion 7 having a cross section cut parallel to the upper surface outer shell 9. FIG. 3A is an enlarged cross-sectional view of the heat sink 31 described later surrounded by the broken line frame A in FIG. 2, and FIG. 3B is a single perspective view of the heat sink 31.

The dehumidifying section 7 includes a dehumidifying section side outer shell 16, an air supply blower 17, an exhaust blower 18, a heat exchanger 19, a compressor 20, a compressor installation section 36, and an outdoor air supply section 21. , The indoor side air supply unit 22, the indoor side exhaust unit 23, and the outdoor side exhaust unit 24 are provided.

The dehumidifying portion side surface outer shell 16 is a sheet metal part that covers the side surface of the dehumidifying portion 7. The dehumidifying portion side surface outer shell 16 is formed by machining a metal plate material such as a galvanized steel plate.

The air supply blower 17 generates an air flow from the outdoor side air supply port 2 to the indoor side air supply port 11. The air supply blower 17 includes a motor and a fan (not shown).

The exhaust blower 18 generates an exhaust flow from the indoor side exhaust port 4 to the outdoor side exhaust port 5. The exhaust blower 18 includes a motor and a fan (not shown).

The heat exchanger 19 passes a refrigerant that cools the air by exchanging heat with the air supply by the refrigeration cycle. The heat exchanger 19 includes a plurality of refrigerant pipes (not shown) for passing the refrigerant and a plurality of heat sinks (not shown). When the air supply passes between the refrigerant pipe and the heat radiating plate, the air supply exchanges heat with the refrigerant and is cooled.

The compressor 20 circulates the refrigerant passing through the inside of the heat exchanger 19 in the refrigeration cycle. The compressor 20 is connected to the heat exchanger 19 by a refrigerant pipe (not shown).

The compressor installation unit 36 is a space for installing the compressor 20 and the inverter control circuit board 37. The compressor installation unit 36 is a space different from the space in which air is conveyed in the ventilation air passage 10. The inverter control circuit board 37 will be described later.

The outdoor side air supply unit 21 is a part of the air supply air passage 13 through which the air supply airflow is passed. The outdoor side air supply unit 21 is arranged on the upstream side of the filter 15 and the heat exchange element 12. The outdoor side air supply unit 21 communicates with the outdoor side air supply port 2 via the upper surface outer shell 9.

The indoor side air supply unit 22 is a part of the space constituting the air supply air passage 13 through which the air supply airflow passes. The indoor air supply unit 22 is arranged on the downstream side of the filter 15 and the heat exchange element 12. The indoor side air supply unit 22 includes an indoor side first air supply unit 25, an indoor side second air supply unit 26, and an indoor side third air supply unit 27.

The indoor first air supply unit 25 is arranged on the upstream side of the heat exchanger 19.

The indoor side second air supply unit 26 is arranged on the downstream side of the heat exchanger 19. The indoor side second air supply unit 26 includes a second air supply unit wall surface 34.

The second air supply unit wall surface 34 forms a part of the wall surface on the space side through which the air supply airflow passes in the indoor side second air supply unit 26. The second air supply portion wall surface 34 includes a wall surface opening 35 for arranging the heat sink 31 described later.

The wall surface opening 35 is an opening that communicates the indoor side second air supply unit 26 and the compressor installation unit 36.

The indoor side third air supply unit 27 is arranged on the downstream side of the indoor side second air supply unit 26. Further, the indoor third air supply unit 27 communicates with the air supply duct 3 via the upper surface outer shell 9.

The indoor side exhaust unit 23 is a part of the exhaust air passage 14 through which the exhaust flow passes, and is arranged on the upstream side of the heat exchange element 12. The indoor side exhaust unit 23 communicates with the indoor side exhaust port 4 via the upper surface outer shell 9.

The outdoor side exhaust unit 24 is a part of the exhaust air passage 14 through which the exhaust flow passes, and is arranged on the downstream side of the heat exchange element 12. The outdoor side exhaust unit 24 includes an outdoor side first exhaust unit 28 and an outdoor side second exhaust unit 29.

The outdoor side first exhaust unit 28 is arranged on the upstream side of the exhaust blower 18. The outdoor side second exhaust unit 29 is arranged on the downstream side of the outdoor side first exhaust unit 28. Further, the outdoor side second exhaust unit 29 communicates with the outdoor side exhaust port 5 via the upper surface outer shell 9.

Further, the dehumidifying unit 7 includes an inverter control circuit board 37 and a heat sink 31 in order to control the operation of the compressor 20.

The inverter control circuit board 37 mounts a plurality of electronic components for operating the compressor 20 under inverter control, and connects the electronic components so as to be electrically communicable. The inverter control circuit board 37 includes a semiconductor element 30.

The semiconductor element 30 is one of the electronic components for driving the inverter.

The heat sink 31 is a type of cooling component that absorbs and dissipates heat generated by a heating element such as an electronic component. The heat sink 31 is formed by processing a metal material having good heat transfer characteristics such as aluminum, iron, and copper. The heat sink 31 is composed of a heat absorbing portion 32 and a heat radiating portion 33.

The endothermic unit 32 absorbs the heat generated by the semiconductor element 30. The endothermic unit 32 is in contact with the semiconductor element 30. The heat absorbing portion 32 is inserted into the wall surface opening 35.

The heat radiating unit 33 dissipates the heat generated by the semiconductor element 30 absorbed by the heat absorbing unit 32 into the air or the like. The heat radiating portion 33 is arranged on the second air supply portion wall surface 34 so as to cover the wall surface opening 35 with screws or the like. That is, the heat radiating section 33 separates the space of the second air supply section 26 on the indoor side from the space of the compressor installation section. The heat radiating portion 33 includes an upright portion 38.

The upright portion 38 is a heat sink that stands up from the outer wall to the inner wall of the air supply air passage 13. The upright portion 38 includes a heat dissipation plane 39.

The heat radiating plane 39 increases the amount of heat radiated by increasing the surface area of the heat radiating portion 33, and enhances the cooling performance of the heat sink 31. The plurality of heat dissipation planes 39 form a recess 40. The recess 40 is a space through which airflow can pass.

The above is the outline of the configuration of the dehumidifying unit 7.

Next, the heat exchange air operation by the ventilation device 1 will be described.

When the operation of the air supply blower 17 is started, air supply is generated in the air supply air passage 13. Further, when the operation of the exhaust blower 18 is started, an exhaust flow is generated in the exhaust air passage 14.

The air supply is supplied from the outdoor side air supply port 2, the outdoor side air supply unit 21, the heat exchange element 12, the indoor side first air supply unit 25, the indoor side second air supply unit 26, and the indoor side third air supply unit 27. , The air supply duct 3, the humidifying section 6, and the indoor air supply port 11 pass in this order.

The exhaust flow passes from the indoor side exhaust port 4 to the indoor side exhaust part 23, the heat exchange element 12, the outdoor side first exhaust part 28, the outdoor side second exhaust part 29, and the outdoor side exhaust port 5 in this order.

When the air supply airflow and the exhaust flow pass through the heat exchange element 12, heat energy is transferred via the heat exchange element 12. That is, the air supply can recover a part of the heat energy transported to the outside by the exhaust flow and return it to the indoor space. As a result, the ventilation device 1 can be expected to have the effect of reducing the loss of heat energy due to the ventilation of the indoor space while the temperature of the indoor space is controlled by using an air conditioner or the like in summer or winter. The above is the heat exchange air operation by the ventilation device 1.

Next, the humidification operation by the ventilation device 1 will be described.

When the operation of the humidifying section 6 is started, the water supplied to the humidifying section 6 is refined to a particle size such as a micrometer size or a nanometer size by a centrifugal crushing method. When the air supply enters the humidifying section 6, the finely divided water is transported to the indoor space on the air supply. As a result, the ventilation device 1 can provide humidified air to the indoor space. The above is the humidification operation by the ventilation device 1.

Next, the dehumidifying operation by the ventilation device 1 will be described.

When the operation of the compressor 20 is started, the compressor 20 circulates the refrigerant inside the heat exchanger 19 and starts the refrigeration cycle by the compressor method. When the air supply passes through the heat exchanger 19 in which the refrigerant circulates, the air supply exchanges heat with the refrigerant and is cooled. The amount of saturated water vapor decreases in the cooled air supply. Therefore, a part of the water contained in the air supply aggregates into water droplets. The aggregated water droplets are temporarily stored in a drain pan or the like (not shown) and drained to the outside of the ventilation device 1 from a drain hose or the like (not shown). As a result, the air in the air supply becomes dry air with less moisture than before passing through the heat exchanger 19, so that the ventilation device 1 can provide dehumidified air to the indoor space. .. The above is the dehumidifying operation by the ventilation device 1.

The operation of the compressor 20 is controlled by inverter control. An inverter refers to a circuit or device that converts direct current into arbitrary alternating current. The compressor 20 is controlled to an arbitrary operation output by applying an alternating current of an arbitrary frequency by inverter control. As a result, for example, when the control unit mounted on the ventilation device 1 determines that active dehumidification operation is not necessary based on the temperature detected by the temperature sensor and the humidity detected by the humidity sensor, the compressor 20 Since the operation output of is suppressed by inverter control, energy saving effect can be expected.

By the way, a semiconductor element 30 is required to drive an inverter, and the semiconductor element 30 generates heat as it operates. Further, the performance of the semiconductor element 30 deteriorates due to heat generation. Therefore, in an environment where the surroundings of the semiconductor element 30 become hot, such as in summer, the semiconductor element 30 becomes overheated, and phenomena such as performance deterioration and failure of the semiconductor element 30 occur, and the desired dehumidifying capacity can be stably obtained. May not be. Therefore, in order to operate the inverter, cooling by the semiconductor element 30 is required in order to prevent the semiconductor element 30 from overheating.

In order to prevent the semiconductor element 30 from overheating, the semiconductor element 30 is in contact with the endothermic portion 32 of the heat sink 31. The endothermic unit 32 absorbs the heat generated by the semiconductor element 30 by heat conduction, which is one of the heat transfer phenomena. The heat absorbed by the heat absorbing unit 32 is transferred to the heat radiating unit 33 by heat conduction. The heat transferred to the heat radiating unit 33 is dissipated by being transferred to the air or the like in contact with the heat radiating unit 33 by heat conduction. The semiconductor element 30 is cooled by repeating this heat conduction. For the purpose of increasing the heat conduction efficiency, thermal paste may be provided between the semiconductor element 30 and the heat absorbing portion 32. Thermal paste refers to grease mixed with particles of metal or metal oxide having high thermal conductivity efficiency.

Further, for the purpose of increasing the amount of heat radiated from the heat radiating unit 33, the heat radiating unit 33 is arranged so as to be exposed on the space side where the air of the ventilation air passage 10 is conveyed. Heat is transferred from the high temperature side to the low temperature side, and as the temperatures of both approaches, it becomes difficult to transfer heat. Therefore, when the heat radiated stays in the air around the heat radiating unit 33, the amount of heat radiated by the heat radiating unit 33 decreases. However, by arranging the heat radiating unit 33 in the space where the air flow due to ventilation is generated, it is possible to prevent the heat radiated in the air from staying around the heat radiating unit 33. As a result, the heat radiating unit 33 can suppress a decrease in the heat radiating amount, and can be expected to have an effect of increasing the heat radiating amount as compared with the case where there is no air flow.

Further, the heat sink 31 is arranged on the downstream side of the heat exchange element 12 in the air supply air passage 13. When the indoor space such as the living room is dehumidified by the ventilation device 1 while lowering the temperature with an air conditioner in summer or the like, the air supply airflow transported from the outdoor space to the indoor space is the exhaust flow transported from the indoor space to the outdoor space. Heat is exchanged between. That is, when the temperature of the supply airflow is higher than the temperature of the exhaust flow, the heat contained in the supply airflow is transferred to the exhaust flow by heat exchange, so that the temperature of the supply airflow is lower than that before the heat exchange with the exhaust flow. .. Therefore, by arranging the heat sink 31 on the downstream side of the heat exchange element 12 in the air supply air passage 13, the heat sink 31 comes into contact with the airflow having a smaller amount of heat than the upstream side of the heat exchange element 12, so that the amount of heat radiation is increased. Can be expected. By arranging the heat sink 31 on the upstream side of the heat exchange element 12 in the exhaust air passage 14, the heat sink 31 comes into contact with the exhaust flow having a smaller amount of heat than the downstream side of the heat exchange element 12, so that the amount of heat radiation is increased. Can be expected.

Further, the heat sink 31 is arranged on the downstream side of the heat exchanger 19 in the air supply air passage 13. When the air supply passes through the heat exchanger 19, it is cooled by exchanging heat with the refrigerant flowing through the heat exchanger 19. That is, the temperature of the airflow after passing through the heat exchanger 19 is lower than that of the airflow before passing through the heat exchanger 19. Therefore, by arranging the heat sink 31 on the downstream side of the heat exchanger 19, the heat sink 31 comes into contact with the air supply having a smaller amount of heat than the upstream side of the heat exchanger 19, so that an increase in the amount of heat radiation can be expected.

Further, the heat sink 31 is arranged on the downstream side of the filter 15. The heat radiating portion 33 of the heat sink 31 includes a plurality of heat radiating planes 39, and the recess 40 is formed by the plurality of heat radiating planes 39. By allowing the air flow to flow through the recess 40, the effect of increasing the surface area of the heat radiating portion 33 and increasing the amount of heat radiating is further enhanced. However, when foreign matter such as dust and insects contained in the air supply is accumulated in the recess 40, the amount of airflow passing through the recess 40 is reduced, so that the amount of heat radiated from the heat sink 31 is reduced. The filter 15 collects foreign matter contained in the air supply. Therefore, the amount of foreign matter contained in the airflow that has passed through the filter 15 is smaller than the amount of foreign matter contained in the airflow that has passed through the filter 15. As a result, the effect of suppressing the accumulation of foreign matter in the recess 40 of the heat sink 31 and suppressing the heat dissipation amount of the heat sink 31 can be expected.

In this way, the ventilation device 1 suppresses overheating of the semiconductor element 30 and is stable by arranging the heat sink 31 in a space that increases the heat dissipation amount of the heat sink 31 and suppresses the heat dissipation amount of the heat sink 31 from becoming small. It can be expected to obtain the dehumidifying ability.

The heat radiation plane 39 may be exposed so as to be parallel to the air flow passing through the ventilation air passage 10. For example, it is arranged so as to be parallel to the air flow from the indoor side first air supply unit 25 to the indoor side second air supply unit 26. As a result, the amount of airflow passing through the recess 40 can be increased as compared with the case where the heat dissipation plane 39 is arranged so as to be perpendicular to the direction of the airflow, so that the effect of increasing the heat dissipation amount of the heat sink 31 can be expected.

Although the ventilation system according to the present invention has been described above based on the embodiment, the present invention is not limited to the embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are also included in the scope of the present invention.

The ventilation device according to the present invention is a ventilation device equipped with a dehumidifying function that dehumidifies with ventilation because it can suppress overheating of the semiconductor element for controlling the operation of the compressor with an inverter and obtain a stable dehumidifying ability. It is useful as.

1 Ventilation device 2 Outdoor side air supply port 3 Air supply duct 4 Indoor side exhaust port 5 Outdoor side exhaust port 6 Humidifying part 7 Dehumidifying part 8 Heat exchange part 9 Upper surface outer shell 10 Ventilation air passage 11 Indoor side air supply port 12 Heat exchange element 13 Air supply air passage 14 Exhaust air passage 15 Filter 16 Dehumidifying part side outer shell 17 Air supply blower 18 Exhaust air blower 19 Heat exchanger 20 Compressor 21 Outdoor side air supply part 22 Indoor side air supply part 23 Indoor side exhaust part 24 Outside exhaust part 25 Indoor side first air supply part 26 Indoor side second air supply part 27 Indoor side third air supply part 28 Outdoor side first exhaust part 29 Outdoor side second exhaust part 30 Semiconductor element 31 Heat exchange 32 Heat absorption part 33 Heat dissipation part 34 Second air supply part Wall surface 35 Wall opening 36 Compressor installation part 37 Inverter control circuit board 38 Standing part 39 Heat dissipation flat surface 40 Recession 101 Humidification unit 102 Blower unit 103 Outside air port 104 Exhaust port 105 Ring air port 106 Air supply Port 107 Air supply adapter 108 Top panel 109 Humidifying unit 110 Air supply air blower 111 Exhaust blower 112 Heat exchange element 113 Air supply air passage 114 Exhaust air passage

Claims (5)

Ventilation air passage and
A heat exchanger that cools the air by exchanging heat between the air passing through the ventilation air passage and the refrigerant of the refrigeration cycle.
A compressor that circulates the refrigerant in the heat exchanger, and
The semiconductor element for driving the compressor and
A heat sink including a heat absorbing portion that absorbs heat generated by the semiconductor element and a heat radiating portion that dissipates the absorbed heat is provided.
The heat sink is
A ventilation device in which the heat radiating portion is arranged on the space side where the air is conveyed in the ventilation air passage. The ventilation air passage is
An air supply air passage for transporting outdoor air indoors,
An exhaust air passage for transporting indoor air to the outside,
A heat exchange element that exchanges heat between the air supply airflow passing through the air supply air passage and the exhaust flow passing through the exhaust air passage is provided.
The heat sink is
The ventilation device according to claim 1, which is arranged on the downstream side of the heat exchange element in the air supply air passage or on the upstream side of the heat exchange element in the exhaust air passage. The heat sink is
The ventilation device according to claim 1 or 2, which is arranged on the downstream side of the heat exchanger. The ventilation air passage is
A filter for collecting dust and the like contained in the air passing through the ventilation air passage is provided.
The heat sink is
The ventilation device according to any one of claims 1 to 3, which is arranged on the downstream side of the filter. The heat radiating part is
A plate-shaped upright portion that stands up from the outer wall of the ventilation air passage toward the inner wall is provided.
The ventilation device according to any one of claims 1 to 4, wherein the plane of the upright portion is exposed so as to be parallel to the air flow passing through the ventilation air passage.

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