WO2017017851A1

WO2017017851A1 - Indoor unit of air conditioners

Info

Publication number: WO2017017851A1
Application number: PCT/JP2015/071699
Authority: WO
Inventors: 中川　英知
Original assignee: 三菱電機株式会社
Priority date: 2015-07-30
Filing date: 2015-07-30
Publication date: 2017-02-02
Also published as: JP6385582B2; JPWO2017017851A1; CN206890670U

Abstract

This indoor unit of air conditioners is equipped with: a casing which has a first suction port at the top thereof and a first blowout port at the bottom thereof; an air blower which is provided downstream from the first suction port within the casing, and has a second suction port at the top thereof; a heat exchanger which is provided downstream from the air blower within the casing, and has a plurality of fins and a plurality of heat transfer pipes; an air passage outside chamber which is provided lateral to the heat exchanger within the casing; a heat transfer pipe storage portion which is provided in the air passage outside chamber and stores one end of the heat transfer pipes; and an electric component box which is provided in the air passage outside chamber and stores a controller. The indoor unit has an air passage that provides communication between the space between the first suction port and the second suction port and the air passage outside chamber.

Description

Air conditioner indoor unit

The present invention relates to an indoor unit of an air conditioner in which a blower is arranged on the upstream side of a heat exchanger.

Conventionally, a heat exchanger that exchanges heat with room air inside a casing formed with a suction port at the upper part and a blower outlet at the lower part, a blower device that is arranged on the upstream side of the heat exchanger and sucks room air, The indoor unit of the air conditioner provided with this is disclosed (for example, refer patent document 1).

In order to perform an efficient operation, an indoor unit of an air conditioner like Patent Document 1 needs to send indoor air sucked in by a blower to a heat exchanger without leakage. Moreover, it is necessary to blow out the conditioned air heat-exchanged by the heat exchanger from the outlet to the indoor space without leakage. For this reason, the air passage from the suction port at the upper part of the casing to the air outlet at the lower part of the casing is sealed to prevent air leakage in the middle of the air passage.

And the heat exchanger tube storage part which seals the edge part of the several heat exchanger tube of a heat exchanger is provided in the air channel outer chamber provided in the side of the heat exchanger in the inside of a casing. In addition, an electrical component box containing a control board is provided in the vicinity of the heat transfer tube storage part of the air passage outer chamber.

JP 2012-37085 A

However, in the conventional air conditioner indoor unit as described above, during the heating operation, since the high-temperature refrigerant flows through the heat transfer tube, the temperature of the heat transfer tube storage portion that stores the end of the heat transfer tube rises. And since an air path is sealed, the flow of air does not generate | occur | produce around an electrical component box, but it will be in the state which the heated air stagnated. And heat accumulates around an electrical component box, and the temperature rise of an electrical component box is accelerated | stimulated. Further, when the indoor unit is operated, the electronic components arranged on the control board in the electrical component box generate heat. And an electrical component box promotes a temperature rise inside by the heat | fever of an electronic component in addition to the heat from a heat exchanger tube accommodating part. As a result, there is a possibility that the electronic components arranged on the control board may be adversely affected by the influence of heat.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an indoor unit of an air conditioner that can suppress a temperature rise around an electrical component box.

The indoor unit of the air conditioner according to the present invention is provided on the downstream side of the first suction port in the casing, the casing having the first suction port in the upper part and the first air outlet in the lower part, A blower having a second suction port at the top, a heat exchanger provided on the downstream side of the blower inside the casing and having a plurality of fins and a plurality of heat transfer tubes, and the heat inside the casing An air passage outer chamber provided on a side of the exchanger, provided in the air passage outer chamber, a heat transfer tube storage portion storing one end of the heat transfer tube, and provided in the air passage outer chamber, An electrical component box that houses the control device, and has an air passage that communicates between the first air inlet and the second air inlet and the air passage outer chamber.

According to the indoor unit of an air conditioner according to the present invention, an air passage is formed that communicates between the suction port of the casing and the suction port of the blower and the air passage outer chamber provided with the electrical component box. The air around the electrical component box can be sucked from the air passage by the blower. As a result, it is possible to eliminate the accumulation of heat around the electrical component box in the outside of the air channel and suppress the temperature rise around the electrical component box, so that the electronic components arranged on the control board in the electrical component box Failure can be suppressed.

It is the perspective view which looked at the indoor unit of the air conditioner concerning Embodiment 1 of the present invention from the front right side. It is a front view which shows typically the inside of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. It is a perspective view of the surroundings of the air blower of the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. It is a front view which shows typically the inside of the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
FIG. 1 is a perspective view of an air conditioner indoor unit 100 according to Embodiment 1 of the present invention as viewed from the front right side, and FIG. 2 is an air conditioner indoor unit according to Embodiment 1 of the present invention. 1 is a front view schematically showing the inside of 100. FIG. In addition, the arrow in FIG. 2 has shown the flow of air. In FIG. 1, two air blowers 10 having the same configuration are provided side by side. However, the present invention is not limited to this, and one or three or more may be provided. Moreover, in FIG. 2, only one air blower 10 is shown for convenience.
Hereinafter, based on FIG. 1 and FIG. 2, the structure of the indoor unit 100 which concerns on this Embodiment 1 is demonstrated.

This indoor unit 100 supplies conditioned air to an air-conditioning target area such as a room by using a refrigeration cycle in which a refrigerant is circulated. The indoor unit 100 mainly includes a casing 1 in which a first inlet 2 for sucking indoor air into the interior and a first outlet 3 for supplying conditioned air to an air-conditioning target area, and the casing 1. A blower 10 that is housed in the interior, sucks room air from the first suction port 2, and blows out conditioned air from the first blower outlet 3, and is disposed in the air passage from the blower 10 to the first blower outlet 3. And a heat exchanger 20 that creates conditioned air by exchanging heat with room air.

And the air path (arrow of FIG. 2) is connected in the casing 1 by these components. The first suction port 2 is formed in the upper part of the casing 1. Moreover, the 1st blower outlet 3 is formed in the lower part of the casing 1, more specifically, the front part of the casing 1 lower opening side. The first air outlet 3 is provided with a wind direction plate 4 in order to send air that has been cooled, heated, dehumidified, and the like by the heat exchanger 20 (hereinafter referred to as conditioned air) in various directions in the indoor space. ing.

The blower 10 is provided on the downstream side of the first suction port 2 and the upstream side of the heat exchanger 20, for example, an axial flow fan, a mixed flow fan, a cross flow fan, a sirocco fan, or the like. And a fan storage portion 12 in which the fan 11 is disposed. A second suction port 13 for sending air to the fan 11 is formed in the upper part of the blower 10, and a second part for sending air to the heat exchanger 20 provided downstream of the fan 11 is formed in the lower part of the blower 10. Two air outlets 14 are formed.
The fan 11 is connected to a drive motor (not shown) that rotationally drives the fan 11.

The heat exchanger 20 is arranged on the upstream side of the first outlet 3 and on the downstream side of the blower 10. The heat exchanger 20 includes a plurality of aluminum fins 21 stacked at regular intervals, and a plurality of heat transfer tubes 22 penetrating the aluminum fins 21. The heat transfer tube 22 is connected to another heat transfer tube 22 at the end. The heat transfer tube 22 branches a refrigerant sent from an outdoor heat exchanger (not shown) provided in an outdoor unit (not shown) of the air conditioner into a plurality of parts, and has resistance caused by the flow of the refrigerant. A plurality are provided for relaxation.

Further, an air passage outer chamber 30 is provided on the side of the heat exchanger 20 inside the casing 1, and one end portion of the plurality of heat transfer tubes 22 is provided in the air passage outer chamber 30. It is stored in the heat tube storage unit 23.
In addition, you may further provide the heat exchanger tube accommodating part which accommodates the other edge part of the some heat exchanger tube 22. As shown in FIG.

Two pipes 24 are provided at one end of the heat exchanger 20. These pipes 24 are connected to an outdoor heat exchanger, and in one pipe 24, the refrigerant sent from the outdoor heat exchanger to the heat exchanger 20 flows, and the other pipe 24 is connected to the outdoor from the heat exchanger 20. The refrigerant sent to the heat exchanger flows.

Also, in the vicinity of the heat transfer tube storage portion 23 of the air passage outer chamber 30, an electrical component box 6 storing a control board 5 for controlling the blower 10 and the wind direction plate 4 is provided.

In such an indoor unit 100, if there is a gap between the heat exchanger 20 and the first outlet 3, air leaks from there. During the cooling operation, the cooled air flows outside the indoor unit 100, that is, outside the air path inside the casing 1. Therefore, the temperature difference between the cooled air and the indoor air temperature causes dew condensation inside the casing 1, leading to a failure of the electronic components and water droplets from the indoor unit 100 to the indoor space. . Further, during the heating operation, heated air flows other than the air path inside the casing 1. For this reason, the temperature rise of the electrical component box 6 is promoted, and the temperature rise of the electronic components arranged on the control board 5 in the electrical component box 6 is also promoted. is there.

Further, in order to perform an efficient operation, it is necessary to send indoor air sucked from the indoor space by the blower 10 to the heat exchanger 20 without leakage. Moreover, it is necessary to blow out the conditioned air heat-exchanged by the heat exchanger 20 into the indoor space without leakage.

Therefore, in the indoor unit 100, it is necessary to seal the air path from the second suction port 13 of the blower 10 to the first air outlet 3 so that there is no air leakage in the middle of the air path.

However, when the second suction port 13 is formed at the same position as the first suction port 2, since a high-temperature refrigerant flows through the heat transfer tube 22 during the heating operation, the heat transfer tubes that house the ends of the plurality of heat transfer tubes 22. The temperature of the storage part 23 rises. And since the air path from the 1st inlet 2 of the upper part of the casing 1 to the 1st blower outlet 3 of the lower part of the casing 1 will be sealed, the flow of air does not generate | occur | produce around the electrical component box 6, The heated air remains. And heat accumulates around the electrical component box 6, and the temperature rise of the electrical component box 6 is promoted.

The electrical component box 6 houses a control board 5 that controls the blower 10 and the wind direction plate 4. When the indoor unit 100 is operated, electronic components (not shown) disposed on the control board 5 are accommodated. ) Generates heat. In addition to the heat from the heat transfer tube storage unit 23, the electrical component box 6 is promoted to increase in internal temperature due to heat generated by the electronic components. As a result, the electronic components arranged on the control board 5 may be damaged due to heat.

Therefore, in the indoor unit 100 according to Embodiment 1, the second suction port 13 is formed at a position different from the first suction port 2, specifically, the second suction port 13 is formed on the downstream side of the first suction port 2. And the air path 31 which connects between the 1st inlet 2 and the 2nd inlet 13 and the air path outer chamber 30 in which the electrical component box 6 was provided is formed.

By forming the air passage 31, the air around the electrical component box 6 in the air passage outer chamber 30 can be sucked from the air passage 31 by the blower 10. As a result, it is possible to eliminate the accumulation of heat around the electrical component box 6 in the air passage outer chamber 30 and to suppress the temperature rise around the electrical component box 6, so that it is arranged on the control board 5 in the electrical component box 6. The failure of the electronic component can be suppressed.

It should be noted that air other than the air passage 31 is prevented from flowing into the air passage 30 from the second suction port 13 of the blower 10 to the first air outlet 3.

As mentioned above, according to the indoor unit 100 which concerns on this Embodiment 1, while being able to perform an efficient operation, the failure of an electronic component can be suppressed and the dew condensation at the time of air_conditionaing | cooling operation can be suppressed. Therefore, the indoor unit 100 of a high quality air conditioner can be provided.

Embodiment 2. FIG.
Hereinafter, the second embodiment of the present invention will be described. However, the description of (a part of) the same as that of the first embodiment is omitted, and the same reference numerals are given to the same or corresponding parts as those of the first embodiment. Attached.
FIG. 3 is a perspective view around the air blower 10 of the indoor unit 101 of the air conditioner according to Embodiment 2 of the present invention, and FIG. 4 is an indoor unit of the air conditioner according to Embodiment 2 of the present invention. 1 is a front view schematically showing the inside of 101. FIG. In addition, the arrow in FIG. 4 has shown the flow of air. In FIG. 3, two air blowers 10 having the same configuration are provided side by side. However, the present invention is not limited to this, and one or three or more may be provided. Moreover, in FIG. 4, only one air blower 10 is shown for convenience.

Hereinafter, based on FIG. 3 and FIG. 4, the structure of the indoor unit 101 which concerns on this Embodiment 2 is demonstrated.
In the indoor unit 101 of the air conditioner according to the second embodiment, a filter storage unit 40 is provided between the first suction port 2 and the second suction port 13. A filter housing case 41 in which a filter 42 is housed is attached to the filter housing portion 40. Here, the filter 42 is for suppressing indoor dust and the like from entering the interior of the indoor unit 101 and adhering to the heat exchanger 20.

The filter storage case 41 attached to the upstream side of the second suction port 13 is attached so that it can be easily attached and detached from the filter storage portion 40 when cleaning the dust attached to the filter 42 and the like.

Further, a vent hole 44 is formed in a side portion of the filter storage portion 40 so as to communicate the filter storage portion 40 with the air passage outer chamber 30 provided with the electrical component box 6. Similarly, a vent hole 43 for communicating the filter storage case 41 and the air passage outer chamber 30 is formed. By forming a plurality of these

air holes

43 and 44 as shown in FIG. 3, more air can be taken into the air passage outer chamber 30 around the electrical component box 6 by the blower 10.

The vent holes 43 and 44 correspond to the “air path” of the present invention.

In addition, in FIG. 3, although the case where an axial flow fan is used as the fan 11 of the air blower 10 is described as an example, in that case, the position of the vent hole 44 formed in the side portion of the filter storage unit 40 is Generation | occurrence | production of the wind noise of the air blower 10 can be suppressed by separating from the 2nd inlet 13 instead of the 2nd inlet 13 vicinity. In FIG. 3, the fan storage portion 12 and the filter storage portion 40 are integrally formed, but may be provided separately.

As described above, in the indoor unit 101 according to the second embodiment, the filter storage unit 40 is provided between the first suction port 2 and the second suction port 13, the side portion of the filter storage unit 40, and the filter storage Vent holes 43 and 44 are formed in the side portion of the filter storage case 41 attached to the portion 40 to communicate them with the air passage outer chamber 30 provided with the electrical component box 6.

By forming the vent holes 43 and 44, the air around the electrical component box 6 can be sucked by the blower 10 from the vent holes 43 and 44. As a result, it is possible to eliminate the heat accumulation around the electrical component box 6 and suppress the temperature rise around the electrical component box 6, so that the failure of the electronic components arranged on the control board 5 in the electrical component box 6 can be prevented. Can be suppressed.

As described above, according to the indoor unit 101 according to the second embodiment, it is possible to perform an efficient operation, suppress a failure of an electronic component, and suppress dew condensation during a cooling operation. Therefore, the indoor unit 101 of a high quality air conditioner can be provided.

In the second embodiment, the filter housing case 41 in which the filter 42 is housed is detachably attached to the filter housing portion 40, but the filter 42 is directly detachably attached to the filter housing portion 40. It is good also as a structure. In that case, only the vent hole 44 may be formed.

1 Casing, 2 First inlet, 3 First outlet, 4 Wind direction plate, 5 Control board, 6 Electrical component box, 10 Blower, 11 Fan, 12 Fan storage, 13 Second inlet, 14 Second blow Outlet, 20 heat exchanger, 21 aluminum fins, 22 heat transfer tubes, 23 heat transfer tube storage, 24 piping, 30 air channel outside chamber, 31 air channel, 40 filter storage, 41 filter storage case, 42 filter, 43 vent 44 vents, 100 indoor units, 101 indoor units.

Claims

A casing having a first inlet at the top and a first outlet at the bottom;
A blower provided on the downstream side of the first suction port in the casing, and having a second suction port at the top;
A heat exchanger provided on the downstream side of the blower in the casing and having a plurality of fins and a plurality of heat transfer tubes;
An air passage outer chamber provided on the side of the heat exchanger in the casing;
A heat transfer tube storage portion provided in the air passage outer chamber and storing one end of the heat transfer tube;
An electrical component box provided in the air channel outer chamber and containing a control device,
An air conditioner indoor unit having an air passage that communicates between the first air inlet and the second air inlet and the air passage outer chamber.
Between the first suction port and the second suction port, provided with a filter storage portion storing a filter,
The indoor unit of the air conditioner according to claim 1, wherein the air passage is provided on a side portion of the filter storage unit.