WO2018011873A1

WO2018011873A1 - Indoor heat exchanging unit and air conditioner

Info

Publication number: WO2018011873A1
Application number: PCT/JP2016/070512
Authority: WO
Inventors: 松本　崇; 教将上村; 繁佳松井
Original assignee: 三菱電機株式会社
Priority date: 2016-07-12
Filing date: 2016-07-12
Publication date: 2018-01-18
Also published as: JP6605144B2; JPWO2018011873A1

Abstract

An indoor heat exchanging unit is provided with: a case in which a first opening and a second opening are formed and that is disposed inside a room; a first heat exchanger that has a plurality of first heat transfer tubes that have flat cross sections and that have a channel in which a heating medium flows formed therein, that is configured such that the first heat transfer tubes are arranged spaced at a first predetermined interval so that air flows between the first heat transfer tubes, that is disposed so as to be exposed from the first opening toward the inside of the room, and that transfers the heat of the heating medium to the inside of the room by radiation; a second heat exchanger that is disposed in a position further toward the interior of the case than the first heat exchanger and that has a gap through which air flows; and a fan that takes in air from the first opening and blows air that passes through the first heat exchanger and the second heat exchanger from the second opening.

Description

Indoor heat exchange unit and air conditioner

The present invention relates to an indoor heat exchange unit that transfers heat by radiation, and an air conditioner including the heat exchange unit.

Generally, an indoor heat exchange unit is composed of a blower, a heat exchanger, and a housing for storing them. As such a conventional indoor heat exchange unit, an indoor heat exchange unit in which a blower is arranged upstream of the heat exchanger and an indoor heat exchange unit in which a heat exchanger is arranged downstream of the heat exchanger are proposed. ing. For example, in the case of an indoor heat exchange unit in which a blower is arranged on the upstream side of the heat exchanger, the heat exchange between the airflow and the refrigerant is performed in the heat exchanger in which the refrigerant is supplied from the outside by blowing the airflow to the heat exchanger. Done. The airflow is cooled or heated, and the airflow is blown into the room from the blowout port of the housing, thereby achieving indoor air conditioning. In addition, for example, in the case of an indoor heat exchange unit in which a blower is arranged on the downstream side of the heat exchanger, in the heat exchanger in which the refrigerant is supplied from the outside by sucking the air flow from the downstream side of the heat exchanger, The heat exchange is performed. The airflow is cooled or heated, and the airflow is blown into the room from the blowout port of the housing, thereby achieving indoor air conditioning.

Such an indoor heat exchange unit adjusts indoor air to a desired temperature by forced convection in which air is circulated through the heat exchanger and heat is exchanged with the internal refrigerant. However, since such an indoor heat exchange unit does not directly transfer heat with the human body surface, the comfort of the thermal environment is impaired.

For this reason, conventionally, a fan and a plate fin type heat exchanger are provided in the casing of the indoor heat exchange unit, and a part of the surface of the heat exchanger is exposed from the casing, thereby transmitting both convection and radiation. An air conditioner that heats or cools an object (such as a human body, a building, or a food) according to a heat form has been proposed (see, for example, Patent Document 1).

JP 2002-162057 A

The conventional indoor heat exchange unit does not have a wide heat transfer surface that has a large difference in surface temperature from the air temperature and faces the living space, and cannot obtain a radiation effect for transmitting and receiving infrared rays. It was. In addition, when a conventional indoor heat exchange unit is newly provided with a large radiant panel that does not allow air flow to generate a radiant effect, the amount of heat exchanger that performs convection heat transfer decreases, and the temperature of the air There is a problem that the time required for raising the temperature increases and the comfort of the user is lowered, and a problem that the indoor heat exchange unit is enlarged.

The present invention has been made to solve the above-described problems, and can heat or cool an object by both heat transfer modes of convection and radiation, and can form a compact indoor heat exchange unit. It is an object of the present invention to obtain an indoor heat exchange unit that can improve the comfort of the user and an air conditioner equipped with the heat exchange unit.

The indoor heat exchange unit according to the present invention has a plurality of flat cross-sectional shapes in which a first opening and a second opening are formed, and a casing installed indoors and a flow path through which a heat medium flows are formed. The first heat transfer tubes are arranged side by side with a first specified interval so that air flows between the first heat transfer tubes, and the first opening is provided to the room. A first heat exchanger that is exposed to the heat and transmits heat of the heat medium to the room by radiation, and is disposed at a position closer to the inner side of the housing than the first heat exchanger. A second heat exchanger having a gap through which air flows, and air is sucked from the first opening, and the air that has passed through the first heat exchanger and the second heat exchanger is blown out from the second opening. And a blower.

The air conditioner according to the present invention supplies heat to the indoor heat exchange unit according to the present invention and the heat medium flowing through the first heat exchanger and the second heat exchanger of the indoor heat exchange unit. A heat source unit.

In the indoor heat exchange unit according to the present invention, the first heat exchanger is exposed from the first opening of the casing. For this reason, the indoor heat exchange unit which concerns on this invention can heat or cool a target object with the heat-transfer form by radiation using a 1st heat exchanger. Moreover, the indoor heat exchange unit which concerns on this invention can heat or cool the air suck | inhaled from the 1st opening part by convection heat transfer, using a 2nd heat exchanger as a convection heat exchanger. That is, the indoor heat exchange unit and the air conditioner according to the present invention can heat or cool an object by both convection and radiation heat transfer modes.

At this time, the indoor heat exchanging unit according to the present invention arranges a plurality of first heat transfer tubes having a flat cross-sectional shape in which a flow path through which a heat medium flows is formed, arranged at first predetermined intervals, so that the first heat exchange is performed. Make up the vessel. Therefore, in the indoor heat exchange unit according to the present invention, the first heat exchanger can also function as a convection heat exchanger, and the air sucked from the first opening is converted into the first heat exchanger and the second heat exchanger. Both exchangers can be heated or cooled by convective heat transfer. That is, the indoor heat exchange unit according to the present invention can increase the mounting amount of the heat exchanger that performs convective heat transfer while forming the indoor heat exchange unit compact. Therefore, the indoor heat exchange unit and the air conditioner according to the present invention can heat or cool an object by both heat transfer modes of convection and radiation, and form the indoor heat exchange unit in a compact manner. User comfort can be improved.

It is a perspective perspective view which shows the indoor heat exchange unit which concerns on Embodiment 1 of this invention. It is the longitudinal cross-sectional view which observed the indoor heat exchange unit which concerns on Embodiment 1 of this invention from the side. It is a cross-sectional view which shows the 1st heat exchanger and 2nd heat exchanger which concern on Embodiment 1 of this invention. It is a cross-sectional view of the 1st heat exchanger which concerns on Embodiment 1 of this invention, and a 2nd heat exchanger, and is a figure which shows the radiation of a 1st heat exchanger. It is a perspective view which shows the 1st heat exchanger and 2nd heat exchanger which concern on Embodiment 2 of this invention. It is a cross-sectional perspective view which shows the 1st heat exchanger and 2nd heat exchanger which concern on Embodiment 2 of this invention. It is a circuit diagram which shows the air conditioner which concerns on Embodiment 3 of this invention. It is a perspective view which shows the 1st heat exchanger of the indoor heat exchange unit which concerns on Embodiment 4 of this invention, and the 2nd heat exchanger vicinity. It is a cross-sectional view which shows the 1st heat exchanger and 2nd heat exchanger vicinity of the indoor heat exchange unit which concerns on Embodiment 4 of this invention. It is a cross-sectional view which shows the 1st heat exchanger which concerns on Embodiment 5 of this invention. It is a transverse cross section of the 1st heat exchanger concerning Embodiment 5 of the present invention, and is a figure showing radiation of the 1st heat exchanger. It is a circuit diagram which shows the air conditioner which concerns on Embodiment 6 of this invention. It is a perspective view which shows the 1st heat exchanger and 2nd heat exchanger which concern on Embodiment 7 of this invention. It is a perspective view which shows the 1st heat exchanger and 2nd heat exchanger which concern on Embodiment 8 of this invention. It is a perspective view which shows the 1st heat exchanger and 2nd heat exchanger which concern on Embodiment 8 of this invention. It is a perspective perspective view which shows the indoor heat exchange unit which concerns on Embodiment 9 of this invention. It is the longitudinal cross-sectional view which observed the indoor heat exchange unit which concerns on Embodiment 9 of this invention from the side. It is a perspective view which shows the 1st heat exchanger and 2nd heat exchanger vicinity of the indoor heat exchange unit which concerns on Embodiment 9 of this invention. It is a cross-sectional view showing the vicinity of the first heat exchanger and the second heat exchanger of the indoor heat exchange unit according to Embodiment 9 of the present invention. It is a circuit diagram which shows the air conditioner which concerns on Embodiment 9 of this invention. It is a schematic diagram which shows the installation structure of the air conditioner which concerns on Embodiment 9 of this invention. It is a circuit diagram which shows the air conditioner which concerns on Embodiment 10 of this invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following embodiments and drawings, the same or corresponding parts are denoted by the same reference numerals. Further, the drawings are schematic, and the ratio of the dimensions of each component changes as appropriate according to the design. Of course, dimensional relationships and ratios may differ between drawings.

Embodiment 1 FIG.
FIG. 1 is a perspective perspective view showing an indoor heat exchange unit according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view of the indoor heat exchange unit according to Embodiment 1 of the present invention observed from the side. FIG. 3 is a cross-sectional view showing the first heat exchanger and the second heat exchanger according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view of the first heat exchanger and the second heat exchanger according to Embodiment 1 of the present invention, and is a view showing radiation of the first heat exchanger.
In FIG. 1, the housing 10 is shown in a transparent manner for easy understanding of the arrangement positions of the first heat exchanger 31 and the second heat exchanger 32. 3 and 4 are cross-sectional views of the first heat exchanger 31 and the second heat exchanger 32 taken along the line AA in FIG.

The indoor heat exchange unit 1 according to Embodiment 1 is installed and used, for example, on a floor near an indoor wall, and includes a first heat exchanger 31, a second heat exchanger 32, a blower 20, and the like. And a housing 10 for storing them.

The housing 10 has, for example, a flat rectangular parallelepiped shape whose depth is smaller than the height and width, and the first opening 11 is formed on one side which is a wide flat surface having the height and width. . When the housing 10 is installed along the indoor wall, the first opening 11 is on the opposite side of the wall and faces the indoor side. The first opening 11 occupies a large area, for example, occupies most of the wide surface facing the room side of the housing 10. In addition, a second opening 12 is formed in the housing 10 at a position above the first opening, such as an upper surface. The height of the first opening 11 is, for example, about 50 to 100 cm from the floor. The height of the second opening 12 is, for example, about 10 cm higher than the height of the first opening 11. The second opening 12 is provided on the upper surface of the housing 10 or on the first opening 11 on the front side facing the room. In addition, although the housing | casing 10 was made into the rectangular parallelepiped shape, it is a rectangular parallelepiped shape where the upper surface inclined, Comprising: You may provide in the inclined upper surface. In the first embodiment, the opening area of the first opening 11 is larger than the opening area of the second opening 12.

The blower 20 is a propeller fan, for example, and is disposed below the second opening 12. By driving the blower 20, indoor air is drawn into the housing 10 from the first opening 11 and blown out from the second opening 12 to the outside of the housing 10 (that is, indoors).

The first heat exchanger 31 is provided so as to be exposed from the first opening 11 toward the indoor side. In the first embodiment, the first heat exchanger 31 is disposed along the opening surface of the first opening 11. The first heat exchanger 31 includes a plurality of first heat transfer tubes 41 extending along the vertical direction, for example. Each of the first heat transfer tubes 41 has a flat shape with a rectangular cross section, for example, and a plurality of flow paths 41a through which a heat medium such as water or refrigerant flows is formed. Further, each of the first heat transfer tubes 41 is arranged side by side in the horizontal direction with a first specified interval 41b. Between the adjacent first heat transfer tubes 41, air flows from the front side to the back side of the first opening 11. For example, the first heat transfer tube 41 is formed by extruding aluminum having high thermal conductivity. Here, in the first embodiment, the cross-sectional shape of the first heat transfer tube 41 is rectangular, but of course, the cross-sectional shape of the first heat transfer tube 41 may be other shapes (elliptical shape, oval shape, etc.). Good.

The second heat exchanger 32 is located behind the first heat exchanger 31 when viewed from the outside of the housing 10 that is the front of the first opening 11, in other words, the housing 10 is more than the first heat exchanger 31. For example, it is arranged facing the first heat exchanger 31 at a position on the inner side of the first heat exchanger 31. The second heat exchanger 32 includes a plurality of second heat transfer tubes 42 extending along, for example, the vertical direction. Each of the second heat transfer tubes 42 has a flat shape with a rectangular cross section, for example, and a plurality of flow paths 42a in which a heat medium such as water or a refrigerant circulates are formed therein. The second heat transfer tubes 42 are arranged side by side in the horizontal direction with a second specified interval 42b. Between the adjacent second heat transfer tubes 42 (gap), air flows from the front side to the back side of the first opening 11. In the first embodiment, the second specified interval 42b is smaller than the first specified interval 41b. For example, the second heat transfer tube 42 is formed by extruding aluminum having high thermal conductivity. Here, in the first embodiment, the cross-sectional shape of the second heat transfer tube 42 is rectangular, but of course, the cross-sectional shape of the second heat transfer tube 42 may be other shapes (elliptical shape, oval shape, etc.). Good.

In addition, although the structure which distribute | circulates a heat medium to the flow path 41a of the 1st heat exchanger 31 and the flow path 42a of the 2nd heat exchanger 32 is not specifically limited, For example, it is set as the following structures. That is, as shown in FIG. 1, both ends of the first heat transfer pipe 41 of the first heat exchanger 31 are inserted into the branch pipe 70. Similarly, both ends of the second heat transfer pipe 42 of the second heat exchanger 32 are inserted into the branch pipe 70. Thereby, the heat medium supplied from one of the branch pipes 70 flows into the flow path 41 a of the first heat exchanger 31 and the flow path 42 a of the second heat exchanger 32. The heat medium that has flowed through the flow path 41 a of the first heat exchanger 31 and the flow path 42 a of the second heat exchanger 32 flows out to the other side of the branch pipe 70. In the first embodiment, by inserting both ends of the first heat transfer tube 41 and the second heat transfer tube 42 into the branch tube 70, the branch tube 70 has a function of fixing these heat transfer tubes.

Subsequently, the operation of the indoor heat exchange unit 1 configured as described above will be described. Hereinafter, a heating operation in which a heat medium having a temperature higher than the room temperature is circulated through the flow path 41a of the first heat exchanger 31 and the flow path 42a of the second heat exchanger 32 will be described. When performing the cooling operation, a heat medium having a temperature lower than the room temperature may be circulated through the flow path 41a of the first heat exchanger 31 and the flow path 42a of the second heat exchanger 32.

When operating the indoor heat exchange unit 1, the blower 20 is driven, and a heat medium having a temperature higher than the room temperature is circulated through the flow path 41a of the first heat exchanger 31 and the flow path 42a of the second heat exchanger 32.

When a high-temperature heat medium flows through the flow path 41 a of the first heat exchanger 31, the first heat exchanger 31 releases radiant heat from the first opening 11. That is, the indoor heat exchange unit 1 according to the first embodiment can heat the room by radiation.

Moreover, the indoor heat exchange unit 1 according to the first embodiment can be heated by forced convection. That is, by driving the blower 20, indoor air is sucked into the housing 10 from the first opening 11. At this time, the air sucked into the housing 10 passes through the first heat exchanger 31 (between the first heat transfer tubes 41) and then the second heat exchanger 32 (between the second heat transfer tubes 42). Pass through. That is, the second heat exchanger 32 is downstream of the first heat exchanger 31 in the air flow generated by the blower 20. At this time, the air passing through the first heat exchanger 31 and the second heat exchanger 32 is heated by a high-temperature heat medium that flows through these heat exchangers. The heated air is blown out from the second opening 12 into the room.

As described above, in the indoor heat exchange unit 1 according to Embodiment 1, each of the front surface and the upper surface of the housing 10 is released by releasing radiant heat from the first opening 11 and blowing out warm air from the second opening 12. It becomes possible to supply heat into the room. For this reason, the indoor heat exchange unit 1 according to the first embodiment can reduce the temperature unevenness of the room, and the comfort of the user can be improved.

Moreover, the indoor heat exchange unit 1 according to Embodiment 1 allows the first heat exchanger 31 to perform heat exchange by forced convection by allowing air to pass through both the first heat exchanger 31 and the second heat exchanger 32. And the heat exchange performance is improved. That is, after the air is heated to some extent by the first heat exchanger 31 that is a heat exchanger for radiation at the front stage, it is further heated by the second heat exchanger 32 that is a heat exchanger for convection at the rear stage. The temperature of the room air sucked from the one opening 11 can be increased to a temperature suitable for room heating. For this reason, it is not necessary to enlarge the heat exchanger for convection, and the indoor heat exchange unit 1 can be formed compactly.
When the indoor heat exchange unit 1 includes an electronic board or the like that controls the blower 20 or the like, the electronic board or the like may be disposed between the second heat exchanger 32 and the rear wall of the housing 10. Good. An electronic board or the like can be accommodated in the housing 10 while the indoor heat exchange unit 1 is made compact.

Moreover, the indoor heat exchange unit 1 according to Embodiment 1 has a configuration in which the opening area of the first opening 11 on the suction side is larger than the opening area of the second opening 12 on the blowing side. For this reason, the speed of intake air can be reduced and the passage loss can be reduced, and the speed of blowout can be increased to allow the temperature-controlled wind to reach far into the room. You may adjust the angle which blows off by providing a louver etc. in the 2nd opening part 12. FIG. On the other hand, since the first opening 11 used for radiation has a large opening area, the air speed (wind speed) is reduced, and gentle temperature control is possible.

Further, the indoor heat exchange unit 1 according to the first embodiment uses the first specified interval 41 b that is the interval between the first heat transfer tubes 41 of the first heat exchanger 31 as the second heat transfer of the second heat exchanger 32. It is smaller than the second specified interval 42b, which is the interval between the heat tubes 42. For this reason, the indoor heat exchange unit 1 according to Embodiment 1 can efficiently exchange heat in the second heat exchanger 32 even if the temperature difference between the air and the heat medium becomes small. .

In the first embodiment, the first heat transfer pipe 41 of the first heat exchanger 31 and the second heat transfer pipe 42 of the second heat exchanger 32 are arranged in the vertical direction, but the arrangement posture is limited. is not. Moreover, although the 1st heat exchanger tube 41 of the 1st heat exchanger 31 and the 2nd heat exchanger tube 42 of the 2nd heat exchanger 32 both use the same pipe | tube, even if these heat exchanger tubes are made into different shapes, The above effects can be obtained. Moreover, in this Embodiment 1, although the branch pipe 70 was comprised with the circular pipe, you may comprise the branch pipe 70 other than a circular pipe. In the first embodiment, the first heat transfer pipe 41 of the first heat exchanger 31 and the second heat transfer pipe 42 of the second heat exchanger 32 are fixed by the branch pipe 70. You may fix with a member.

In the first embodiment, the first heat transfer tube 41 of the first heat exchanger 31 and the second heat transfer tube 42 of the second heat exchanger 32 are made of aluminum, but may be made of other materials. . For example, the first heat transfer tube 41 and the second heat exchanger 32 of the first heat exchanger 31 are made of a material having a good heat conductivity such as copper or stainless steel or a material through which a heat medium can be circulated such as a resin using alumina powder as a filler. The second heat transfer tube 42 may be formed.

In the first embodiment, a propeller fan is used as the blower 20. However, the blower 20 may be a blower such as a crossflow fan or a turbo fan. Moreover, the rotating shaft of the blower 20 is not limited to vertical, but may be oblique or horizontal. Further, the second opening 12 may be formed on the front side (side surface on which the first opening 11 is formed) instead of the upper surface of the housing 10.

Although the above has been described with respect to the heating operation, when the cooling operation is performed using the first embodiment, the indoor side is at a higher temperature than the first heat exchanger 31 or the second heat exchanger 32. In that case, the 1st heat exchanger 31 cools by absorbing the radiation heat from a room (anti-radiation). The same applies to the cooling in that the first heat exchanger 31 uses radiation, and the description of the radiation of the first heat exchanger 31 described above can be replaced with the description of anti-radiation during the cooling operation. Further, during the cooling operation, the air passing through the first heat exchanger 31 and the second heat exchanger 32 is cooled by a cold heat medium flowing through these heat exchangers.

Embodiment 2. FIG.
The second heat exchanger 32 is not limited to the configuration of the first embodiment, and may include a heat transfer fin between the adjacent second heat transfer tubes 42, for example. In the second embodiment, items not particularly described are the same as those in the first embodiment.

FIG. 5 is a perspective view showing a first heat exchanger and a second heat exchanger according to Embodiment 2 of the present invention. FIG. 6 is a cross-sectional perspective view showing a first heat exchanger and a second heat exchanger according to Embodiment 2 of the present invention. 6 is a cross-sectional view of the first heat exchanger 31 and the second heat exchanger 32 taken along the line AA in FIG.

The second heat transfer tubes 42 of the second heat exchanger 32 are arranged side by side with a second specified interval 42b. And between the adjacent 2nd heat exchanger tubes 42, the heat transfer fin 50 which contacts these 2nd heat exchanger tubes 42 is provided. The heat transfer fins 50 are formed so as to fold a plurality of thin plates less than 1 mm, for example, so as to have a width of a second specified interval 42 b that is a gap between the second heat transfer tubes 42. The heat transfer fins 50 are configured to promote convective heat transfer by providing protrusions, cut-and-raised shapes, and the like on the surface.

In addition, although the material of the heat transfer fin 50 is not limited like the 2nd heat transfer tube 42, in this Embodiment 2, aluminum with high heat conductivity is used. Moreover, in this Embodiment 2, the 2nd heat exchanger tube 42 is also formed with aluminum with high heat conductivity. The second heat transfer tubes 42 and the heat transfer fins 50 are connected to each other by metal bonding including, for example, a sawlock brazing method.

On the other hand, the first heat exchanger 31 in which the plurality of first heat transfer tubes 41 are arranged at intervals of the first specified interval 41b does not include heat transfer fins between the adjacent first heat transfer tubes 41. Yes. Accordingly, heat is radiated from the surface of the first heat transfer tube 41 into the room. And the 1st specified space | interval 41b which is the clearance gap between the 1st heat exchanger tubes 41 is the space | interval which a user's finger does not enter so that a user's finger may not touch the heat transfer fin 50 of the 2nd heat exchanger 32. It has become. In the second embodiment, the first specified interval 41b is, for example, an interval of less than 5 mm so that the finger of the child does not touch the heat transfer fins 50 of the second heat exchanger 32.

As described above, in the indoor heat exchange unit 1 configured as in the second embodiment, similarly to the first embodiment, the room can be heated by both the convection and radiation heat transfer modes, and the user Can improve comfort. Further, in the indoor heat exchange unit 1 according to the second embodiment, as in the first embodiment, in addition to the second heat exchanger 32, the first heat exchanger 31 also functions as a convection heat exchanger, The indoor heat exchange unit 1 can be made compact.

Moreover, since the indoor heat exchange unit 1 according to the second embodiment includes the heat transfer fins 50 in the second heat exchanger 32, the efficiency is improved even when the temperature difference between the air and the heat medium is reduced. Heat exchange.

Further, in the indoor heat exchange unit 1 according to the second embodiment, the first specified interval 41b, which is the gap between the first heat transfer tubes 41, has a child's finger placed on the heat transfer fin 50 of the second heat exchanger 32. In order not to touch, it is the interval where children's fingers do not enter. For this reason, the indoor heat exchange unit 1 according to the second embodiment can prevent the user and child from touching the heat transfer fins 50 of the second heat exchanger 32 and being injured.

In the second embodiment, the first specified interval 41 b that is the interval between the first heat transfer tubes 41 of the first heat exchanger 31 is the first interval that is the interval between the second heat transfer tubes 42 of the second heat exchanger 32. It is larger than the two specified intervals 42b. However, if the first specified interval 41b is an interval that does not allow the user's fingers to enter, the first specified interval 41b may be smaller than the second specified interval 42b as in the first embodiment. Even if the temperature difference between the air and the heat medium is reduced in the second heat exchanger 32, both can be more efficiently heat-exchanged.

In the second embodiment, the corrugated fin formed by folding a plurality of thin plates is exemplified as the heat transfer fin 50. However, the heat transfer fin 50 may be configured by other fin shapes such as a plate fin.

Embodiment 3 FIG.
In the third embodiment, an example of an air conditioner according to the present invention, that is, an example of an air conditioner including the indoor heat exchange unit according to the present invention will be described. In Embodiment 3, items that are not particularly described are the same as those in Embodiment 1 or Embodiment 2.

FIG. 7 is a circuit diagram showing an air conditioner according to Embodiment 3 of the present invention.
Hereinafter, the circuit of the air conditioner 200 according to Embodiment 3 will be described with reference to FIG.
The air conditioner 200 includes an indoor heat exchange unit 1 and a heat source unit 100 that supplies heat to a heat medium flowing through the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1.

The heat source unit 100 includes a refrigeration cycle circuit 110. The refrigeration cycle circuit 110 is configured by connecting a compressor 111, a water-refrigerant heat exchanger 112, for example, a refrigerant flow rate control device 113 such as an expansion valve, and a heat source side heat exchanger 114. Specifically, the water-refrigerant heat exchanger 112 includes a refrigerant channel and a water channel. The compressor 111 and the refrigerant flow control device 113 are connected to the refrigerant flow path of the water-refrigerant heat exchanger 112. In the refrigeration cycle circuit 110, refrigerants such as R410A, R32, and CO ₂ that enable a vapor compression cycle circulate.

Further, the water-refrigerant heat exchanger 112 has a water circuit in which the water flow path of the water-refrigerant heat exchanger 112 is connected to the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1 by piping. 120 constitutes a part. Specifically, the water circuit 120 includes a water flow path of the water-refrigerant heat exchanger 112, a pump 121, and the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1 connected to each other by piping. Yes. Water circulates in the water circuit 120. The pump 121 for circulating water in the water circuit 120 may be mounted on the heat source unit 100 or may be mounted on the indoor heat exchange unit 1. Further, brine or the like may be circulated in the water circuit 120.
Here, in this Embodiment 3, the 1st heat exchanger 31 and the 2nd heat exchanger 32 are connected in series so that the water which flowed through the 1st heat exchanger 31 may flow through the 2nd heat exchanger 32. Has been.

When the air conditioner 200 configured as described above is operated, the high-temperature gaseous refrigerant discharged from the compressor 111 of the heat source unit 100 flows into the refrigerant flow path of the water-refrigerant heat exchanger 112. Then, the high-pressure gaseous refrigerant that has flowed into the refrigerant flow path of the water-refrigerant heat exchanger 112 enters a gas-liquid two-phase state to supply heat to the water flowing through the water flow path of the water-refrigerant heat exchanger 112, It becomes a liquid refrigerant. The liquid refrigerant is reduced in pressure by passing through the refrigerant flow control device 113 to be in a gas-liquid two-phase state, gasified by absorbing heat from outside air in the heat source side heat exchanger 114, and returned to the compressor 111.

On the other hand, in the water circuit 120, the water heated by the water-refrigerant heat exchanger 112 is sent to the indoor heat exchange unit 1 by the pump 121. Then, the water sent to the indoor heat exchange unit 1 exchanges heat with the indoor air in the indoor heat exchange unit 1 and returns to the water-refrigerant heat exchanger 112 at a low temperature.

Here, as described above, in the indoor heat exchange unit 1, the first heat exchanger 31 is connected to the upstream side of the second heat exchanger 32. For this reason, the high-temperature water heated by the water-refrigerant heat exchanger 112 first flows into the first heat exchanger 31, and the amount of radiant heat of the first heat exchanger 31 can be increased. In addition, by providing the second heat exchanger 32 with high heat exchange efficiency on the downstream side of the first heat exchanger 31, it is possible to efficiently exchange heat even if the temperature difference between air and hot water becomes small. .

Embodiment 4 FIG.
The indoor heat exchange unit according to the present invention may be provided with the following filter. In the fourth embodiment, items that are not particularly described are the same as those in the first to third embodiments.

FIG. 8 is a perspective view showing the vicinity of the first heat exchanger and the second heat exchanger of the indoor heat exchange unit according to Embodiment 4 of the present invention. FIG. 9 is a cross-sectional view showing the vicinity of the first heat exchanger and the second heat exchanger of the indoor heat exchange unit according to Embodiment 4 of the present invention. 9 is a cross-sectional view taken along the line AA of FIG.

The first heat exchanger 31 according to the fourth embodiment has the same configuration as that of the first embodiment. That is, the first heat exchanger 31 according to the fourth embodiment includes a plurality of first heat transfer tubes 41. Each of the first heat transfer tubes 41 has a flat cross section, and for example, a plurality of flow paths 41a through which a heat medium such as water or a refrigerant flows is formed. The first heat transfer tubes 41 are arranged side by side with a first specified interval 41b. For example, the first heat transfer tube 41 is formed by extruding aluminum having high thermal conductivity.

The second heat exchanger 32 according to the fourth embodiment also has the same configuration as that of the first embodiment. That is, the second heat exchanger 32 is opposed to the first heat exchanger 31, for example, at a position behind the first heat exchanger 31, in other words, on the inner side of the housing 10 with respect to the first heat exchanger 31. Are arranged. The second heat exchanger 32 includes a plurality of second heat transfer tubes 42. Each of the second heat transfer tubes 42 has a flat cross section, and for example, a plurality of flow paths 42a through which a heat medium such as water or a refrigerant flows is formed. In addition, the second heat transfer tubes 42 are arranged side by side with a second specified interval 42b. The second specified interval 42b is smaller than the first specified interval 41b. For example, the second heat transfer tube 42 is formed by extruding aluminum having high thermal conductivity.

Here, in the fourth embodiment, a filter 60 that removes dust from the air after passing through the first heat exchanger 31 is provided between the first heat exchanger 31 and the second heat exchanger 32. ing. The filter 60 is, for example, provided with a plastic lattice on a non-woven fabric formed so that air can pass through. Further, for example, the filter 60 is made of a porous material.

As shown in the first embodiment, the first specified interval 41 b that is the interval between the first heat transfer tubes 41 of the first heat exchanger 31 is the interval between the second heat transfer tubes 42 of the second heat exchanger 32. By making it smaller than the second specified interval 42b, even if the temperature difference between the air and the heat medium is reduced in the second heat exchanger 32, both can be efficiently heat-exchanged. On the other hand, by reducing the second specified interval 42b, dust is likely to accumulate in the second heat exchanger 32. Moreover, since the 2nd heat exchanger 32 is arrange | positioned behind the 1st heat exchanger 31, it is difficult to clean.

However, since the indoor heat exchange unit 1 according to Embodiment 4 includes the filter 60 between the first heat exchanger 31 and the second heat exchanger 32, dust can be captured by the filter 60. It is possible to suppress the accumulation of dust on the second heat exchanger 32. That is, a decrease in the heat exchange performance of the second heat exchanger 32 can be suppressed. Further, by providing the filter 60 behind the first heat exchanger 31, the filter 60 is hidden by the first heat exchanger 31 when the indoor heat exchange unit 1 is viewed from the front side (first opening 11 side). . For this reason, the effect that dust is hard to be seen by the user and the aesthetic appearance is not impaired is also obtained.

The first specified interval 41b, which is the interval between the first heat transfer tubes 41 of the first heat exchanger 31, is smaller than the second specified interval 42b, which is the interval between the second heat transfer tubes 42 of the second heat exchanger 32. Even if not, it is preferable to provide a filter 60 between the first heat exchanger 31 and the second heat exchanger 32. It is possible to suppress the accumulation of dust on the second heat exchanger 32 that is disposed behind the first heat exchanger 31 and is difficult to clean. In addition, the filter 60 is hidden by the first heat exchanger 31 so that it is difficult for the user to see dust and the aesthetic appearance is not impaired. Further, in the second heat exchanger 32 including the heat transfer fins 50 shown in the second embodiment, dust easily accumulates on the second heat exchanger 32. For this reason, even when such a second heat exchanger 32 is adopted, the above effect can be obtained by providing the filter 60 between the first heat exchanger 31 and the second heat exchanger 32. it can.

Embodiment 5 FIG.
By configuring the first heat exchanger 31 as follows, the heat exchange performance by radiation can be improved. In the fifth embodiment, items that are not particularly described are the same as those in the first to fourth embodiments.

FIG. 10 is a cross-sectional view showing a first heat exchanger according to Embodiment 5 of the present invention. FIG. 11 is a cross-sectional view of the first heat exchanger according to Embodiment 5 of the present invention, and is a view showing radiation of the first heat exchanger. In addition, these FIG.10 and FIG.11 is a cross section perpendicular | vertical to the flow path 41a formed in the 1st heat exchanger tube 41 of the 1st heat exchanger 31. FIG.
The first heat exchanger 31 includes a plurality of first heat transfer tubes 41. Each of the first heat transfer tubes 41 has a flat shape with a rectangular cross section, for example, and a plurality of flow paths 41a through which a heat medium such as water or refrigerant flows is formed. Further, each of the first heat transfer tubes 41 is arranged side by side in the horizontal direction with a first specified interval 41b.

Here, the center line in the direction along the long side in the cross section of the first heat transfer tube 41 is BB. The center line in the direction along the short side in the cross section of the first heat transfer tube 41 is defined as CC. A geometric center of gravity in the cross section of the first heat transfer tube 41 is a point E, and a line connecting the points E of the first heat transfer tubes 41 is DD. That is, the arrangement direction of the first heat transfer tubes 41 is DD. A straight line perpendicular to DD is defined as FF. At this time, each first heat transfer tube 41 of the first heat exchanger 31 according to the fifth embodiment has a center line BB in the direction along the long side in the cross section of the first heat transfer tube 41, and the straight line F- Inclined with respect to F.

In the first heat exchanger 31 configured in this way, as shown in FIG. 11, when the first heat transfer tubes 41 are observed in the direction of the center line CC, the first heat transfer tubes 41 arranged in front are provided. Therefore, the tip end portion of the first heat transfer tube 41 disposed rearward is exposed. As a result, as indicated by an arrow G in FIG. 11, heat exchange by radiation between the human body, the wall surface, the floor surface, and the like facing the first heat exchanger 31 in the direction of the center line CC can be improved. . In addition, as shown by H in the figure, by passing the airflow through the gaps provided between the first heat transfer tubes 41, heat exchange between the airflow and the refrigerant can be realized simultaneously by convective heat transfer.

Embodiment 6 FIG.
In the sixth embodiment, another example of the air conditioner according to the present invention, which is different from the third embodiment, will be introduced. In the sixth embodiment, items that are not particularly described are the same as those in the first to fifth embodiments.

FIG. 12 is a circuit diagram showing an air conditioner according to Embodiment 6 of the present invention.
Hereinafter, the circuit of the air conditioner according to Embodiment 6 will be described with reference to FIG.
The air conditioner 200 according to Embodiment 6 includes an indoor heat exchange unit 1 and a heat source unit that supplies heat to the heat medium flowing through the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1. 100.

Here, the air conditioner 200 according to the sixth embodiment is different from the third embodiment in that it does not have the water circuit 120 and the first heat exchanger 31 and the second heat of the indoor heat exchange unit 1. The exchanger 32 is connected to the refrigeration cycle circuit 110. That is, the air conditioner 200 according to the sixth embodiment causes the refrigerant of the refrigeration cycle circuit 110 to flow through the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1 as a heat medium, and the heat source side The heat collected in the heat exchanger 114 is configured to be supplied to the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1.

Specifically, the refrigeration cycle circuit 110 includes the compressor 111, the first heat exchanger 31 of the indoor heat exchange unit 1, the second heat exchanger 32 of the indoor heat exchange unit 1, the refrigerant flow rate control device 113, and the heat source side heat exchange. The vessel 114 is connected by piping. The first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1 are connected in series so that the refrigerant (heat medium) that has flowed through the first heat exchanger 31 flows through the second heat exchanger 32. It is connected to the. In the refrigeration cycle circuit 110, refrigerants such as R410A, R32, and CO ₂ that enable a vapor compression cycle circulate.

When the air conditioner 200 configured as described above is operated, the high-temperature gaseous refrigerant discharged from the compressor 111 of the heat source unit 100 is sent to the indoor heat exchange unit 1. Then, the high-pressure gaseous refrigerant sent to the indoor heat exchange unit 1 becomes a gas-liquid two-phase state, supplies heat into the room in the indoor heat exchange unit 1, and becomes a liquid refrigerant. After flowing out of the indoor heat exchange unit 1, the liquid refrigerant is decompressed by passing through the refrigerant flow rate control device 113 to be in a gas-liquid two-phase state, and is gasified by absorbing heat from outside air in the heat source side heat exchanger 114, Return to the compressor 111.

Here, as described above, in the indoor heat exchange unit 1, the first heat exchanger 31 is connected to the upstream side of the second heat exchanger 32. For this reason, the high-temperature refrigerant discharged from the compressor 111 first flows into the first heat exchanger 31, and the amount of radiant heat of the first heat exchanger 31 can be increased. In addition, the second heat exchanger 32 can create a state with a high heat transfer rate by allowing the gas-liquid two-phase refrigerant that has partially exchanged heat to flow into the second heat exchanger 32. For this reason, in the 2nd heat exchanger 32 arrange | positioned downstream of the airflow with respect to the 1st heat exchanger 31, it becomes possible to exchange heat efficiently, even if the temperature difference of air and a refrigerant | coolant becomes small.

Embodiment 7 FIG.
As described above in the first embodiment, the arrangement postures of the first heat transfer tube 41 of the first heat exchanger 31 and the second heat transfer tube 42 of the second heat exchanger 32 are not limited. The first heat transfer tube 41 of the first heat exchanger 31 and the second heat transfer tube 42 of the second heat exchanger 32 may have different shapes. Therefore, in Embodiment 7 and Embodiment 8 described later, an example in which at least one of the arrangement posture and the shape of the second heat transfer tube 42 is changed with respect to each of the above-described embodiments will be described. In Embodiment 7 and Embodiment 8 to be described later, items not particularly described are the same as those in Embodiments 1 to 6.

FIG. 13 is a perspective view showing a first heat exchanger and a second heat exchanger according to Embodiment 7 of the present invention.
The first heat exchanger 31 includes a plurality of first heat transfer tubes 41 extending along the vertical direction, for example. Each of the first heat transfer tubes 41 has a flat shape with a rectangular cross section, for example, and a plurality of flow paths 41a through which a heat medium such as water or a refrigerant circulates are formed therein. Further, each of the first heat transfer tubes 41 is arranged side by side in the horizontal direction with a first specified interval 41b. For example, the first heat transfer tube 41 is formed by extruding aluminum having high thermal conductivity.

On the other hand, the second heat exchanger 32 disposed behind the first heat exchanger 31 includes a plurality of second heat transfer tubes 42 having, for example, a tubular shape extending along the lateral direction. Moreover, each of the 2nd heat exchanger tubes 42 is arranged in the up-down direction at predetermined intervals. In the seventh embodiment, each of the second heat transfer tubes 42 is arranged in a staggered manner in a side view. The second heat exchanger 32 according to the seventh embodiment includes a plurality of plate-like heat transfer fins 50 through which the second heat transfer tubes 42 pass. These heat transfer fins 50 are arranged side by side in the extending direction (lateral direction) of the second heat transfer tube 42 at regular intervals. That is, the surface of the heat transfer fin 50 and the second heat transfer tube 42 are substantially vertical. By inserting the second heat transfer tube 42 into the through-hole formed in the heat transfer fin 50 and expanding the second heat transfer tube 42, the heat transfer fin 50 and the second heat transfer tube are thermally coupled. . Note that the heat transfer fins 50 may be configured to provide protrusions and cut-and-raised shapes on the surface of the heat transfer fins 50 to promote convective heat transfer.

Here, the first specified interval 41b, which is a gap between the first heat transfer tubes 41, is an interval at which the user's fingers do not enter so that the user's fingers do not touch the heat transfer fins 50 of the second heat exchanger 32. It has become. In the seventh embodiment, the first specified interval 41b is an interval of, for example, less than 5 mm so that the child's fingers do not touch the heat transfer fins 50 of the second heat exchanger 32.

As described above, even if the second heat exchanger 32 is configured as in the seventh embodiment, the same effects as those described in the second embodiment can be obtained.

That is, in the indoor heat exchange unit 1 configured as in the seventh embodiment, similarly to the first embodiment, the room can be heated by both convection and radiation heat transfer modes. Can improve comfort. Further, in the indoor heat exchange unit 1 according to the seventh embodiment, as in the first embodiment, in addition to the second heat exchanger 32, the first heat exchanger 31 also functions as a convection heat exchanger, The indoor heat exchange unit 1 can be made compact. Moreover, since the indoor heat exchange unit 1 which concerns on this Embodiment 7 is provided with the heat-transfer fin 50 in the 2nd heat exchanger 32 similarly to Embodiment 2, the temperature difference of air and a heat medium has become. Even if it becomes small, both can be heat-exchanged efficiently.

In the indoor heat exchange unit 1 according to the seventh embodiment, as in the second embodiment, the first specified interval 41b, which is the gap between the first heat transfer tubes 41, is transmitted by the second heat exchanger 32. In order to prevent the fingers of the child from touching the heat fin 50, the interval is such that the fingers of the child do not enter. For this reason, the indoor heat exchange unit 1 according to the seventh embodiment can prevent the user and the child from being injured by touching the heat transfer fins 50 of the second heat exchanger 32 as in the second embodiment. .

Embodiment 8 FIG.
14 and 15 are perspective views showing a first heat exchanger and a second heat exchanger according to Embodiment 8 of the present invention. FIG. 14 illustrates the vicinity of the center of the first heat exchanger 31 and the second heat exchanger 32. FIG. 15 illustrates the vicinity of the lateral ends of the first heat exchanger 31 and the second heat exchanger 32.

The first heat exchanger 31 includes, for example, a plurality of first heat transfer tubes 41 extending in the vertical direction. Each of the first heat transfer tubes 41 has a flat shape with a rectangular cross section, for example, and a plurality of flow paths 41a through which a heat medium such as water or refrigerant flows is formed. Further, each of the first heat transfer tubes 41 is arranged side by side in the horizontal direction with a first specified interval 41b. For example, the first heat transfer tube 41 is formed by extruding aluminum having high thermal conductivity.

On the other hand, the second heat exchanger 32 disposed behind the first heat exchanger 31 includes a plurality of second heat transfer tubes 42 extending in the lateral direction. Each of the second heat transfer tubes 42 has a flat shape with a rectangular cross section, for example, and a plurality of flow paths 42a in which a heat medium such as water or a refrigerant circulates are formed therein. Each of the second heat transfer tubes 42 is arranged side by side in the vertical direction with a second specified interval 42b. In the eighth embodiment, a heat transfer tube having a flat cross section is bent into a U shape, and the two second heat transfer tubes 42 are formed as one component.

The second heat exchanger 32 according to the eighth embodiment includes a plurality of plate-like heat transfer fins 50 through which the second heat transfer tubes 42 pass. These heat transfer fins 50 are arranged side by side in the extending direction (lateral direction) of the second heat transfer tube 42 at regular intervals. That is, the surface of the heat transfer fin 50 and the second heat transfer tube 42 are substantially vertical. The heat transfer fins 50 and the second heat transfer tubes 42 are made of, for example, aluminum having high thermal conductivity, and are connected by metal bonding including, for example, a noclock brazing method. Note that the heat transfer fins 50 may be configured to provide protrusions and cut-and-raised shapes on the surface of the heat transfer fins 50 to promote convective heat transfer.

Here, the first specified interval 41b, which is a gap between the first heat transfer tubes 41, is an interval at which the user's fingers do not enter so that the user's fingers do not touch the heat transfer fins 50 of the second heat exchanger 32. It has become. In the eighth embodiment, the first specified interval 41b is, for example, an interval of less than 5 mm so that the child's fingers do not touch the heat transfer fins 50 of the second heat exchanger 32.

As described above, even when the second heat exchanger 32 is configured as in the eighth embodiment, the same effects as those described in the second embodiment can be obtained.

That is, in the indoor heat exchange unit 1 configured as in the eighth embodiment, similarly to the first embodiment, indoor heating can be performed by both convection and radiation heat transfer modes. Can improve comfort. Further, in the indoor heat exchange unit 1 according to the eighth embodiment, as in the first embodiment, in addition to the second heat exchanger 32, the first heat exchanger 31 also functions as a convection heat exchanger, The indoor heat exchange unit 1 can be made compact. Moreover, since the indoor heat exchange unit 1 according to the eighth embodiment includes the heat transfer fins 50 in the second heat exchanger 32 as in the second embodiment, the temperature difference between the air and the heat medium is small. Even if it becomes small, both can be heat-exchanged efficiently.

In the indoor heat exchange unit 1 according to the eighth embodiment, as in the second embodiment, the first specified interval 41b, which is the gap between the first heat transfer tubes 41, is transmitted by the second heat exchanger 32. In order to prevent the fingers of the child from touching the heat fin 50, the interval is such that the fingers of the child do not enter. For this reason, the indoor heat exchange unit 1 according to the eighth embodiment can prevent the user and child from touching the heat transfer fins 50 of the second heat exchanger 32 and being injured as in the second embodiment. .

Embodiment 9 FIG.
In the ninth embodiment, another example of the air conditioner according to the present invention, which is different from the third and sixth embodiments, will be introduced. In the ninth embodiment, an example of an indoor heat exchange unit according to the present invention in which some of the configurations described in the above embodiments are combined will be described. In the ninth embodiment, an example of how to install the air conditioner according to the present invention will also be described. In the ninth embodiment, items not particularly described are the same as those in the first to eighth embodiments.

FIG. 16 is a perspective perspective view showing an indoor heat exchange unit according to Embodiment 9 of the present invention. FIG. 17: is the longitudinal cross-sectional view which observed the indoor heat exchange unit which concerns on Embodiment 9 of this invention from the side. FIG. 18 is a perspective view showing the vicinity of the first heat exchanger and the second heat exchanger of the indoor heat exchange unit according to Embodiment 9 of the present invention. FIG. 19 is a cross-sectional view showing the vicinity of the first heat exchanger and the second heat exchanger of the indoor heat exchange unit according to Embodiment 9 of the present invention.
In FIG. 16, the housing 10 is shown in a transparent manner in order to facilitate understanding of the arrangement positions of the first heat exchanger 31 and the second heat exchanger 32. 18 and 19 are cross-sectional views of the first heat exchanger 31 and the second heat exchanger 32 taken along the line AA in FIG.

The indoor heat exchange unit 1 according to the ninth embodiment includes a first heat exchanger 31, a second heat exchanger 32, a blower 20, and a housing 10 that houses them.

The housing 10 has, for example, a rectangular parallelepiped shape, and a first opening 11 is formed on one side surface. In addition, a second opening 12 is formed in the housing 10 at a position above the first opening, such as an upper surface. The blower 20 is a propeller fan, for example, and is disposed below the second opening 12. By driving the blower 20, air in the room (room 300 described later) is sucked into the housing 10 from the first opening 11, and from the second opening 12 to the outside of the housing 10 (room 300 described later). Blown out.

The first heat exchanger 31 is provided so as to be exposed from the first opening 11. In the ninth embodiment, the first heat exchanger 31 is disposed along the opening surface of the first opening 11. The first heat exchanger 31 includes a plurality of first heat transfer tubes 41 extending along the vertical direction, for example. Each of the first heat transfer tubes 41 has a flat shape with a rectangular cross section, for example, and a plurality of flow paths 41a through which a heat medium such as water or refrigerant flows is formed. Further, each of the first heat transfer tubes 41 is arranged side by side in the horizontal direction with a first specified interval 41b. For example, the first heat transfer tube 41 is formed by extruding aluminum having high thermal conductivity.

The second heat exchanger 32 is located behind the first heat exchanger 31, in other words, at a position closer to the inner side of the housing 10 than the first heat exchanger 31, for example, facing the first heat exchanger 31. Has been placed. The second heat exchanger 32 includes a plurality of second heat transfer tubes 42 extending along, for example, the vertical direction. Each of the second heat transfer tubes 42 has a flat shape with a rectangular cross section, for example, and a plurality of flow paths 42a in which a heat medium such as water or a refrigerant circulates are formed therein. The second heat transfer tubes 42 are arranged side by side in the horizontal direction with a second specified interval 42b. For example, the second heat transfer tube 42 is formed by extruding aluminum having high thermal conductivity.

Further, between the adjacent second heat transfer tubes 42, heat transfer fins 50 that are in contact with the second heat transfer tubes 42 are provided. The heat transfer fins 50 are formed so as to fold a plurality of thin plates less than 1 mm, for example, so as to have a width of a second specified interval 42 b that is a gap between the second heat transfer tubes 42. The heat transfer fins 50 are configured to promote convective heat transfer by providing protrusions, cut-and-raised shapes, and the like on the surface. In addition, although the material of the heat transfer fin 50 is not limited like the 2nd heat transfer tube 42, in this Embodiment 9, aluminum with high heat conductivity is used. The second heat transfer tubes 42 and the heat transfer fins 50 are connected to each other by metal bonding including, for example, a sawlock brazing method.

Here, the first heat exchanger 31 in which the plurality of first heat transfer tubes 41 are arranged at intervals of the first specified interval 41b is configured not to include heat transfer fins between the adjacent first heat transfer tubes 41. ing. And the 1st specified space | interval 41b which is the clearance gap between the 1st heat exchanger tubes 41 is the space | interval which a user's finger does not enter so that a user's finger may not touch the heat transfer fin 50 of the 2nd heat exchanger 32. It has become. In the ninth embodiment, the first specified interval 41b is an interval of, for example, less than 5 mm so that the child's fingers do not touch the heat transfer fins 50 of the second heat exchanger 32.

In addition, although the structure which distribute | circulates a heat medium to the flow path 41a of the 1st heat exchanger 31 and the flow path 42a of the 2nd heat exchanger 32 is not specifically limited, For example, it is set as the following structures. That is, as shown in FIG. 16, both ends of the first heat transfer pipe 41 of the first heat exchanger 31 are inserted into the branch pipe 70. Similarly, both ends of the second heat transfer pipe 42 of the second heat exchanger 32 are inserted into the branch pipe 70. Thereby, the heat medium supplied from one of the branch pipes 70 flows into the flow path 41 a of the first heat exchanger 31 and the flow path 42 a of the second heat exchanger 32. The heat medium that has flowed through the flow path 41 a of the first heat exchanger 31 and the flow path 42 a of the second heat exchanger 32 flows out to the other side of the branch pipe 70. In the ninth embodiment, by inserting both ends of the first heat transfer tube 41 and the second heat transfer tube 42 into the branch tube 70, the branch tube 70 has a function of fixing these heat transfer tubes.

Further, in the ninth embodiment, a filter 60 that removes dust from the air after passing through the first heat exchanger 31 is provided between the first heat exchanger 31 and the second heat exchanger 32. Yes. The filter 60 is, for example, provided with a plastic lattice on a non-woven fabric formed to allow air to pass therethrough. Further, for example, the filter 60 is made of a porous material.

FIG. 20 is a circuit diagram showing an air conditioner according to Embodiment 9 of the present invention.
The air conditioner 200 includes an indoor heat exchange unit 1 and a heat source unit 100 that supplies heat to a heat medium flowing through the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1.

The heat source unit 100 includes a refrigeration cycle circuit 110. The refrigeration cycle circuit 110 is configured by connecting a compressor 111, a refrigerant flow path of a water-refrigerant heat exchanger 112, a refrigerant flow rate control device 113, and a heat source side heat exchanger 114. In the refrigeration cycle circuit 110, refrigerants such as R410A, R32, and CO ₂ that enable a vapor compression cycle circulate.

Further, the water-refrigerant heat exchanger 112 has a water circuit in which the water flow path of the water-refrigerant heat exchanger 112 is connected to the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1 by piping. 120 constitutes a part. Specifically, the water circuit 120 includes a water flow path of the water-refrigerant heat exchanger 112, a pump 121, and the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1 connected to each other by piping. Yes. Water circulates in the water circuit 120. Here, in the ninth embodiment, the first heat exchanger 31 and the second heat exchanger 32 are connected in series so that the water that has flowed through the first heat exchanger 31 flows through the second heat exchanger 32. Has been.

The indoor heat exchange unit 1 according to the ninth embodiment includes a bypass pipe 72 connected in parallel with the first heat exchanger 31 in the water circuit 120. That is, in the water circuit 120, one end of the bypass pipe 72 is connected to the upstream side of the first heat exchanger 31, and the other end of the bypass pipe 72 is the downstream side of the first heat exchanger 31 and the second heat It is connected to a position on the upstream side of the exchanger 32. The indoor heat exchange unit 1 according to the ninth embodiment includes a flow rate adjuster 71 that adjusts the flow rate of water flowing through the bypass pipe 72 in the bypass pipe 72. The flow controller 71 is, for example, a needle type flow controller. Further, for example, the flow controller 71 may be configured by using an electromagnetic on-off valve or a flow resistor.
That is, the air conditioner 200 according to the ninth embodiment has a configuration in which a bypass pipe 72 and a flow rate controller 71 are added to the circuit of the air conditioner 200 shown in the third embodiment (FIG. 7). .

FIG. 21 is a schematic diagram showing an installation configuration of an air conditioner according to Embodiment 9 of the present invention.
As shown in FIG. 21, the indoor heat exchange unit 1 is installed in a room 300 on, for example, a floor near a wall. The heat source unit 100 is disposed outside the room 300, for example, outdoors. The indoor heat exchange unit 1 and the heat source unit 100 are connected by a pipe constituting the water circuit 120.

Subsequently, the operation of the air conditioner 200 according to Embodiment 9 will be described. When starting the operation of the air conditioner 200, the heat source unit 100 drives the compressor 111. For example, the heat source unit 100 drives the pump 121. The indoor heat exchange unit 1 drives the blower 20.

The high-temperature gaseous refrigerant discharged from the compressor 111 of the heat source unit 100 flows into the refrigerant flow path of the water-refrigerant heat exchanger 112. Then, the high-pressure gaseous refrigerant that has flowed into the refrigerant flow path of the water-refrigerant heat exchanger 112 enters a gas-liquid two-phase state to supply heat to the water flowing through the water flow path of the water-refrigerant heat exchanger 112, It becomes a liquid refrigerant. The liquid refrigerant is reduced in pressure by passing through the refrigerant flow control device 113 to be in a gas-liquid two-phase state, gasified by absorbing heat from outside air in the heat source side heat exchanger 114, and returned to the compressor 111.

On the other hand, in the water circuit 120, the water heated by the water-refrigerant heat exchanger 112 is sent to the indoor heat exchange unit 1 by the pump 121. Then, the water sent to the indoor heat exchange unit 1 exchanges heat with the air in the room 300 in the indoor heat exchange unit 1 and returns to the water-refrigerant heat exchanger 112 at a low temperature.

The operation of the indoor heat exchange unit 1 in the room 300 will be described in detail. When the operation of the indoor heat exchange unit 1 is started, the flow path 41 a of the first heat exchanger 31 and the flow path of the second heat exchanger 32. Water having a temperature higher than the room temperature of the room 300 flows to 42a. When high-temperature water flows through the flow path 41 a of the first heat exchanger 31, the first heat exchanger 31 releases radiant heat from the first opening 11 into the room 300.

Also, by driving the blower 20, the air in the room 300 is sucked into the housing 10 from the first opening 11. At this time, the air sucked into the housing 10 passes through the first heat exchanger 31, passes through the filter 60, and then passes through the second heat exchanger 32. At this time, the air passing through the first heat exchanger 31 and the second heat exchanger 32 is heated with high-temperature water flowing through these heat exchangers. Then, the heated air is blown out from the second opening 12 into the room 300. That is, the heat by radiation is supplied from the first opening 11 to the room 300 and the heat by hot air is supplied from the second opening 12 to the room 300, so that the temperature of the room 300 rises and the user's residence The part is in an air-conditioned state.

Here, as shown in FIG. 20, in the indoor heat exchange unit 1, the first heat exchanger 31 is connected to the upstream side of the second heat exchanger 32. For this reason, the high-temperature water heated by the water-refrigerant heat exchanger 112 first flows into the first heat exchanger 31, and the amount of radiant heat of the first heat exchanger 31 can be increased. In addition, by providing the second heat exchanger 32 with high heat exchange efficiency on the downstream side of the first heat exchanger 31, it is possible to efficiently exchange heat even if the temperature difference between air and hot water becomes small. .

In addition, since the indoor heat exchange unit 1 according to the ninth embodiment includes the bypass pipe 72 and the flow rate controller 71, the flow rate controller 71 adjusts the amount of water flowing through the bypass pipe 72, thereby The amount of water flowing through one heat exchanger 31 can be adjusted. By adjusting the amount of water flowing through the first heat exchanger 31, it is possible to adjust the increase and decrease of the heat exchange amount of each of the first heat exchanger 31 and the second heat exchanger 32, and by heat supply by radiation and hot air The balance of heat supply can be controlled. For this reason, the air conditioner 200 according to Embodiment 9 can further improve the comfort of residents in the room 300.

As described above, in the air conditioner 200 according to the ninth embodiment, the room can be heated by both the convection and radiation heat transfer modes, and the comfort of the user can be improved. In addition, the air conditioner 200 according to the ninth embodiment allows the indoor heat exchange unit 1 to be compactly formed by causing the first heat exchanger 31 to function as a convection heat exchanger in addition to the second heat exchanger 32. can do.

In addition, the air conditioner 200 according to the ninth embodiment emits radiant heat from the first opening 11 and blows out warm air from the second opening 12, so that a room is formed from each of the front surface and the upper surface of the housing 10. Heat can be supplied into 300. For this reason, the air conditioner 200 according to the ninth embodiment can reduce the temperature unevenness of the room and further improve the comfort of the user.

In addition, since the air conditioner 200 according to the ninth embodiment includes the heat transfer fins 50 in the second heat exchanger 32, even if the temperature difference between the air and the heat medium becomes small, both can be efficiently used. Heat exchange.

In the air conditioner 200 according to the ninth embodiment, the first specified interval 41b, which is the gap between the first heat transfer tubes 41, is touched by the child's fingers on the heat transfer fins 50 of the second heat exchanger 32. There is an interval where children's fingers do not enter. For this reason, the air conditioner 200 according to Embodiment 9 can prevent the user and child from touching the heat transfer fins 50 of the second heat exchanger 32 and being injured.

Moreover, since the air conditioner 200 according to the ninth embodiment includes the filter 60 between the first heat exchanger 31 and the second heat exchanger 32, the filter 60 can capture dust and It is possible to prevent dust from accumulating on the second heat exchanger 32 that is difficult to clean because of no reach. That is, a decrease in the heat exchange performance of the second heat exchanger 32 can be suppressed. Further, by providing the filter 60 behind the first heat exchanger 31, the filter 60 is hidden by the first heat exchanger 31 when the indoor heat exchange unit 1 is viewed from the front side (first opening 11 side). . For this reason, the effect that dust is hard to be seen by the user and the aesthetic appearance is not impaired is also obtained.

In addition, since the air conditioner 200 according to the ninth embodiment includes the bypass pipe 72 and the flow rate adjuster 71, the flow rate adjuster 71 adjusts the amount of water flowing through the bypass pipe 72 so that the first The amount of water flowing through the heat exchanger 31 can be adjusted. By adjusting the amount of water flowing through the first heat exchanger 31, it is possible to adjust the increase and decrease of the heat exchange amount of each of the first heat exchanger 31 and the second heat exchanger 32, and by heat supply by radiation and hot air The balance of heat supply can be controlled. For this reason, the air conditioner 200 according to Embodiment 9 can further improve the comfort of residents in the room 300.

In addition, you may add the bypass piping 72 and the flow regulator 71 to the circuit of the air conditioner 200 shown in Embodiment 6 (FIG. 12). The amount of the refrigerant flowing through the first heat exchanger 31 can be adjusted by adjusting the amount of the refrigerant flowing through the bypass pipe 72 with the flow rate controller 71. By adjusting the amount of refrigerant flowing through the first heat exchanger 31, the increase and decrease of the heat exchange amount of each of the first heat exchanger 31 and the second heat exchanger 32 can be adjusted, and the heat supply by radiation and the hot air The balance of heat supply can be controlled. For this reason, even if the bypass pipe 72 and the flow controller 71 are added to the circuit of the air conditioner 200 shown in Embodiment 6 (FIG. 12), the comfort of the occupants in the room 300 can be further improved. it can.

Embodiment 10 FIG.
In the tenth embodiment, another example of the air conditioner according to the present invention, which is different from the third embodiment, the sixth embodiment, and the ninth embodiment, will be introduced. In the tenth embodiment, items that are not particularly described are the same as those in the first to ninth embodiments.

FIG. 22 is a circuit diagram showing an air conditioner according to Embodiment 10 of the present invention.
The air conditioner 200 includes an indoor heat exchange unit 1 and a heat source unit 100 that supplies heat to a heat medium flowing through the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1.

Further, the water-refrigerant heat exchanger 112 has a water circuit in which the water flow path of the water-refrigerant heat exchanger 112 is connected to the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1 by piping. 120 constitutes a part. Specifically, the water circuit 120 includes a water flow path of the water-refrigerant heat exchanger 112, a pump 121, and the first heat exchanger 31 and the second heat exchanger 32 of the indoor heat exchange unit 1 connected to each other by piping. Yes. Water circulates in the water circuit 120.

Here, in the tenth embodiment, the flow path 41a of the first heat exchanger 31 and the flow path 42a of the second heat exchanger 32 are connected in parallel. Further, in the water circuit 120, a flow rate controller 71 that adjusts the flow rate of water flowing through these heat exchangers is provided on the upstream side of at least one of the first heat exchanger 31 and the second heat exchanger 32. ing. In addition, in FIG. 22, the example provided with the flow volume regulator 71 in the upstream of the 1st heat exchanger 31 is shown. The flow controller 71 is, for example, a needle type flow controller. Further, for example, the flow controller 71 may be configured by using an electromagnetic on-off valve or a flow resistor.

Next, the operation of the air conditioner 200 according to Embodiment 10 will be described.
The high-temperature gaseous refrigerant discharged from the compressor 111 of the heat source unit 100 flows into the refrigerant flow path of the water-refrigerant heat exchanger 112. Then, the high-pressure gaseous refrigerant that has flowed into the refrigerant flow path of the water-refrigerant heat exchanger 112 enters a gas-liquid two-phase state to supply heat to the water flowing through the water flow path of the water-refrigerant heat exchanger 112, It becomes a liquid refrigerant. The liquid refrigerant is reduced in pressure by passing through the refrigerant flow control device 113 to be in a gas-liquid two-phase state, gasified by absorbing heat from outside air in the heat source side heat exchanger 114, and returned to the compressor 111.

Here, in the indoor heat exchange unit 1, the flow path 41a of the first heat exchanger 31 and the flow path 42a of the second heat exchanger 32 are connected in parallel. For this reason, the amount of water flowing into the first heat exchanger 31 and the amount of water flowing through the second heat exchanger 32 are adjusted by adjusting the amount of water flowing into the first heat exchanger 31 with the flow rate controller 71. Both can be adjusted. Thereby, increase / decrease in each heat exchange amount of the 1st heat exchanger 31 and the 2nd heat exchanger 32 can be adjusted, and the balance of the heat supply by radiation and the heat supply by warm air can be controlled. For this reason, the air conditioner 200 according to Embodiment 10 can further improve the comfort of indoor residents.

Even when the first heat exchanger 31 and the second heat exchanger 32 are connected to the refrigeration cycle circuit 110, the flow path 41a of the first heat exchanger 31 and the flow path 42a of the second heat exchanger 32 May be connected in parallel. And it is good to equip the upstream of at least one of the 1st heat exchanger 31 and the 2nd heat exchanger 32 with the flow regulator 71 which adjusts the flow of the refrigerant which flows into these heat exchangers. Even if comprised in this way, since the increase / decrease in each heat exchange amount of the 1st heat exchanger 31 and the 2nd heat exchanger 32 can be adjusted, since the balance of the heat supply by radiation and the heat supply by warm air can be controlled, It becomes possible to improve the comfort of the occupants in the room.

DESCRIPTION OF SYMBOLS 1 Indoor heat exchange unit, 10 housing | casing, 11 1st opening part, 12 2nd opening part, 20 blower, 31 1st heat exchanger, 32 2nd heat exchanger, 41 1st heat exchanger tube, 41a flow path, 41b 1st specified interval, 42 2nd heat transfer tube, 42a flow path, 42b 2nd specified interval, 50 heat transfer fin, 60 filter, 70 branch pipe, 71 flow controller, 72 bypass pipe, 100 heat source unit, 110 refrigeration cycle circuit , 111 compressor, 112 water-refrigerant heat exchanger, 113 refrigerant flow control device, 114 heat source side heat exchanger, 120 water circuit, 121 pump, 200 air conditioner, 300 rooms.

Claims

A housing in which a first opening and a second opening are formed and installed indoors;
A plurality of first heat transfer tubes having a flat cross section formed with a flow path through which a heat medium flows are formed, and the first heat transfer tubes are arranged so that air flows between the first heat transfer tubes. A first heat exchanger that is arranged side by side at a specified interval, is arranged to be exposed toward the room from the first opening, and transmits heat of the heat medium to the room by radiation;
A second heat exchanger having a gap through which air flows and is disposed at a position on the inner side of the housing from the first heat exchanger;
A blower that sucks air from the first opening and blows out the air that has passed through the first heat exchanger and the second heat exchanger from the second opening;
Indoor heat exchange unit with
The second heat exchanger is located behind the first heat exchanger as viewed from outside the first opening,
The indoor heat exchange unit according to claim 1, wherein the second heat exchanger is downstream of the first heat exchanger in the flow of air by the blower.
The first heat exchanger does not include a heat transfer fin between the adjacent first heat transfer tubes, and transfers heat of the heat medium from the surface of the first heat transfer tube to the room by radiation. Item 3. The indoor heat exchange unit according to Item 2.
The second heat exchanger has a plurality of second heat transfer tubes in which the heat medium flows, and the second heat transfer tubes are secondly arranged so that air flows between the second heat transfer tubes. The indoor heat exchange unit according to any one of claims 1 to 3, wherein the indoor heat exchange units are arranged side by side at regular intervals.
The indoor heat exchange unit according to claim 4, wherein the second heat exchanger is provided with heat transfer fins in contact with the second heat transfer tubes between the adjacent second heat transfer tubes.
The indoor heat exchange unit according to claim 4 or 5, wherein the second specified interval is smaller than the first specified interval.
The first heat exchanger and the second heat exchanger are connected in series so that the heat medium that has flowed through the first heat exchanger flows through the second heat exchanger. The indoor heat exchange unit according to any one of Items 6.
A bypass pipe connected in parallel with the first heat exchanger;
The indoor heat exchange unit according to claim 7, further comprising a flow rate adjuster that is provided in the bypass pipe and adjusts the flow rate of the heat medium flowing through the bypass pipe.
The flow path through which the heat medium in the first heat exchanger flows and the flow path through which the heat medium in the second heat exchanger flow are connected in parallel.
The flow rate controller for adjusting the flow rate of the heat medium is provided upstream of at least one of the first heat exchanger and the second heat exchanger. The indoor heat exchange unit as described.
The indoor heat exchange unit according to any one of claims 1 to 9, further comprising a filter that removes dust in the air between the first heat exchanger and the second heat exchanger.
In a cross section perpendicular to the flow path formed inside the first heat transfer tube,
Each of the first heat transfer tubes is
The center line in the direction along the long side in the cross section of the first heat transfer tube is inclined with respect to a straight line perpendicular to the arrangement direction of the first heat transfer tubes. The indoor heat exchange unit as described.
The indoor heat exchange unit according to any one of claims 1 to 11, wherein an opening area of the first opening is larger than an opening area of the second opening.
The indoor heat exchange unit according to any one of claims 1 to 12,
A heat source unit for supplying heat to the heat medium flowing through the first heat exchanger and the second heat exchanger of the indoor heat exchange unit;
Air conditioner equipped with.