CN113518885B

CN113518885B - Outdoor unit for air conditioner and air conditioner

Info

Publication number: CN113518885B
Application number: CN201980093458.7A
Authority: CN
Inventors: 岩濑拓; 佐藤庸子
Original assignee: Hitachi Johnson Controls Air Conditioning Inc
Current assignee: Hitachi Johnson Controls Air Conditioning Inc
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2022-11-18
Anticipated expiration: 2039-04-08
Also published as: WO2020208669A1; JPWO2020208669A1; CN113518885A; JP6808098B1

Abstract

The present invention relates to an outdoor unit for an air conditioner, and an air conditioner, wherein the outdoor unit for an air conditioner comprises a rectangular parallelepiped case (11), an outdoor heat exchanger (12) that is provided in the case (11) and exchanges heat between external air and a refrigerant, an outdoor fan (13) that is provided in the case (11), a nozzle (14) that surrounds the outer periphery of the outdoor fan (13) and forms a discharge port for air using the outdoor fan (13), conversion substrates (35 a, 35 b) that are provided in a space between the sides of the nozzle (14) and the inside of a side cover (31) that becomes the case, and a flow path (a) that is provided in the side cover (31) and in which an inlet (41) and an outlet (42) are open to the outside and through which air flows via the conversion substrates (35 a, 35 b) or radiators (36 a, 36 b), and the outlet (42) is arranged adjacent to the nozzle (14) and in such a manner that the direction of the air discharged from the nozzle (14) is directed toward the same direction side.

Description

Outdoor unit for air conditioner and air conditioner

Technical Field

The invention relates to an outdoor unit for an air conditioner and an air conditioner.

Background

As a background art in this field, japanese patent laid-open No. 2013-79807 (patent document 1) is known. This publication describes: "an electric component unit including an outdoor unit main body, a heat exchanger housed in the outdoor unit main body, an air blowing fan provided in an upper portion of the outdoor unit main body and blowing air sucked from a side surface of the outdoor unit main body upward, a ventilation member surrounding an outer periphery of the air blowing fan to form an air blowing port, and an opening portion housed in the outdoor unit main body and disposed between one end portion and the other end portion of the heat exchanger, the electric component unit being disposed so as to straddle a lower end of the ventilation member in a vertical direction, and the electric component unit being disposed on an outer side in a horizontal direction of the ventilation member in an upper side than the lower end of the ventilation member" (refer to an abstract).

As another background art in this field, japanese patent application laid-open No. 2013-29222 (patent document 2) is known. This publication describes: "a space enclosed by the box body, the frame supporting the box body, and the front panel covering the outer surface of the electric component box," a ventilation guide having an air passage for introducing outside air into the electric component box is provided downstream of the suction port of the enclosed space. The ventilation guide is provided with a wall having a plurality of holes formed in the middle of the air passage, and forms a labyrinth air passage bent at least once in the upper and lower directions, and the discharge direction of the outside air at the inlet of the electric component box is bent 90 degrees with respect to the suction direction of the outside air at the suction port (see abstract).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-79807

Patent document 2: japanese patent laid-open publication No. 2013-29222

Disclosure of Invention

Problems to be solved by the invention

Patent documents 1 and 2 describe techniques for cooling an electric component unit and an electric component box by blowing air in an outdoor unit of an air conditioner. However, the techniques of patent documents 1 and 2 directly blow air for cooling the electric component unit and the electric component box by driving the outdoor fan. Therefore, the outdoor fan must blow air for cooling the electric component units and the electric component box, as well as outside air for ventilating the outdoor heat exchanger. Therefore, there is a problem that the direct air blowing for cooling the electric component unit and the electric component box increases the load of the outdoor fan.

Therefore, an object of the present invention is to provide an outdoor unit for an air conditioner and an air conditioner that can suppress an increase in load on an outdoor fan.

Means for solving the problems

In order to solve the above problems, the present invention is characterized in that: the air conditioner includes a case, an outdoor heat exchanger provided in the case and configured to exchange heat between outside air and a refrigerant, an outdoor fan provided in the case, a nozzle opening surrounding an outer periphery of the outdoor fan and forming an air outlet for the outdoor fan, an electric component provided in a space between a side of the nozzle opening and an inside of the case, and a flow path in which an inlet and an outlet are provided so as to open to an outside of the case and through which air of the electric component or a member in contact with the electric component flows, wherein the outlet is disposed so as to be adjacent to the nozzle opening and to face the same direction side as a direction in which the air is blown out from the nozzle opening.

Effects of the invention

According to the present invention, it is possible to provide an outdoor unit for an air conditioner and an air conditioner that can suppress an increase in load on an outdoor fan.

Problems, structures, and effects other than those described above will be apparent from the following description of the embodiments.

Drawings

Fig. 1 is a system diagram showing an overall configuration of an air conditioner according to embodiment 1 of the present invention.

Fig. 2 is a longitudinal sectional view of an outdoor unit according to embodiment 1 of the present invention.

Fig. 3 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is a vertical sectional view of an upper part of an outdoor unit according to embodiment 2 of the present invention.

Fig. 5 is a longitudinal sectional view of an upper part of an outdoor unit according to embodiment 3 of the present invention.

Fig. 6 is a longitudinal sectional view of an upper portion of an outdoor unit according to embodiment 4 of the present invention.

Fig. 7 is a plan view of an outdoor unit according to embodiment 5 of the present invention.

Detailed Description

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

First, the problems of the present embodiment will be explained. In the technology of patent document 1, in the top-emission type outdoor unit, as shown in fig. 12 of patent document 1, an electrical component box is provided from a space between a box body of an outdoor unit main body and a discharge port to a lower side of the box body of the outdoor unit main body. When the blower fan is driven, upward air blown by the blower fan is also discharged from the nozzle through the periphery of the electric component box, and the electric component box is cooled by the air.

In the technique of patent document 1, a part of air taken directly from the outside without passing through the heat exchanger is also used for cooling the electric component box, but air after heat exchange by the heat exchanger is also used for cooling the electric component box. Since the temperature of the air after such heat exchange is high when the air conditioner is in the cooling operation, the electric component box cannot be sufficiently cooled. Further, since the electrical component box is disposed also on the upstream side of the blower fan, a pressure loss of air flowing through the casing of the outdoor unit main body is caused, and noise is increased. Further, since the air that has cooled the electric component box is directly discharged to the outside by the blower fan, the load of the blower fan increases. The airflow sucked into the first suction port from the section C is in the reverse direction with respect to the airflow blown upward from the blower fan. Therefore, the flow of air indicated by arrows in section C is weakened.

On the other hand, in the technology of patent document 2, which is the same top-blowing type outdoor unit, since the electric component box is cooled only by the outside air that does not pass through the heat exchanger, the electric component box can be sufficiently cooled by the outside air of relatively low temperature. Further, since the electric component box is not present on the upstream side of the outdoor fan (on the downstream side of the heat exchanger), no pressure loss of the upstream air is caused, and no noise is increased.

However, as shown in fig. 1 of patent document 2, in the technique of patent document 2, the air after cooling the electric component box is also directly discharged to the outside of the nozzle by driving the outdoor fan. Therefore, in the present technology, the load of the outdoor fan also increases.

As described above, in the techniques of patent documents 1 and 2, since the air flow for cooling the electric component box is generated directly by the fan, there is a problem that the load of the fan is increased.

Hereinafter, examples of the present invention for eliminating such a problem will be described.

Example 1

Fig. 1 is a system diagram showing the overall configuration of an air conditioner 100 according to embodiment 1. The air conditioner 100 includes a compressor 131, a four-way valve 132, an indoor heat exchanger 101, an expansion valve 103, an outdoor heat exchanger 12, and the like, and the respective components are connected by pipes 121. The indoor heat exchanger 101 and the indoor fan 102 are provided in the indoor unit 108. The compressor 131, the four-way valve 132, the expansion valve 103, the outdoor heat exchanger 12, and the outdoor fan 13 are provided in the outdoor unit 1, which is an outdoor unit for an air conditioner according to an embodiment of the present invention. The expansion valve 103 may be provided in the indoor unit 108, or may be provided in both the indoor unit 108 and the outdoor unit 1.

The compressor 131 is a device that compresses a low-temperature low-pressure gas refrigerant by driving a compressor motor and discharges the compressed gas refrigerant as a high-temperature high-pressure gas refrigerant.

The four-way valve 132 is a valve for switching the flow path of the refrigerant according to the operation mode of the air conditioner 100.

The expansion valve 103 is a valve that decompresses the refrigerant condensed in the "condenser" (one of the outdoor heat exchanger 12 and the indoor heat exchanger 101 depending on the type of air conditioning operation). The refrigerant decompressed by the expansion valve 103 is introduced into the "evaporator" (the other of the outdoor heat exchanger 12 and the indoor heat exchanger 101 depending on the type of air-conditioning operation).

The indoor heat exchanger 101 is a heat exchanger that exchanges heat between the refrigerant passing through the outdoor heat exchanger 12 and the indoor air (air of the space to be air-conditioned) sent in from the indoor fan 102.

The indoor fan 102 is a fan that sends indoor air to the indoor heat exchanger 101, and is provided in the vicinity of the indoor heat exchanger 101.

The outdoor heat exchanger 12 exchanges heat between the refrigerant flowing through the heat transfer tubes and the outdoor air sent from the outdoor fan 13.

The outdoor fan 13 is a fan that sends outdoor air to the outdoor heat exchanger 12.

A refrigeration cycle of the heat pump air conditioner 100 will be described with reference to fig. 1 by taking a heating operation as an example. In the air conditioner 100, the flow of the refrigerant during the heating operation is indicated by a solid arrow 141. The compressor 131 is a device that compresses a gas refrigerant, and the gas refrigerant in a high-temperature and high-pressure state in the compressor 131 is introduced into the indoor heat exchanger 101 (condenser) in the indoor unit 108 through the four-way valve 132. The high-temperature refrigerant flowing through the indoor heat exchanger 101 radiates heat to the indoor air supplied from the indoor fan 102, thereby warming the room. At this time, the gas refrigerant deprived of heat is gradually liquefied in the outdoor heat exchanger 12, and a low-temperature supercooled liquid refrigerant, which is lower than the saturation temperature by about several degrees celsius, flows out from the outlet of the indoor heat exchanger 101.

Then, the liquid refrigerant flowing out of the indoor unit 108 is changed into a gas-liquid two-phase refrigerant in a low-temperature and low-pressure state by an expansion action when passing through the expansion valve 103. The low-temperature low-pressure gas-liquid two-phase refrigerant is introduced into the outdoor heat exchanger 12 (evaporator) in the outdoor unit 1. The low-temperature gas-liquid two-phase refrigerant flowing through the heat transfer pipe of the outdoor heat exchanger 12 absorbs heat from the outside air supplied from the outdoor fan 13, and increases the dryness of the refrigerant (= mass velocity of gas refrigerant/(mass velocity of liquid refrigerant + mass velocity of gas refrigerant)). At the outlet of the outdoor heat exchanger 12, the refrigerant is vaporized and returns to the compressor 131 in a state where the degree of superheat increases by about several degrees celsius. The heating operation of the air conditioner 100 is realized by the series of refrigeration cycles described above.

On the other hand, the flow of the refrigerant during the cooling operation is indicated by a broken-line arrow 142. During the cooling operation, the four-way valve 132 is switched to form a refrigeration cycle in which the refrigerant circulates in the direction of the broken-line arrow 142. In this case, the indoor heat exchanger 101 functions as an evaporator, and the outdoor heat exchanger 12 functions as a condenser. The series of refrigeration cycles realizes a cooling operation of the air conditioner 100.

The air conditioner 100 may be implemented as a device dedicated to cooling operation, or may be implemented as a device dedicated to heating operation. These situations do not require the four-way valve 132.

Fig. 2 isbase:Sub>A longitudinal sectional view of the outdoor unit 1 of embodiment 1, and fig. 3 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 2. In fig. 2, the arrangement components of the electric component box housing space 33, which will be described later, are shown in a shifted manner in order to facilitate understanding of the arrangement components and the like in the electric component box housing space 33. In embodiment 1, the position of the

electrical component boxes

34a and 34b is shown in fig. 3. The arrangement position is appropriately determined according to the purpose and the like. In fig. 2 and 3, the dimensions and the like are shown as being exaggerated and reduced as appropriate.

The outdoor unit 1 is an upward-blowing type outdoor unit, and includes a casing 11, an outdoor heat exchanger 12, an outdoor fan 13, a discharge port 14,

electric component boxes

34a and 34b, and the like. The case 11 is a rectangular parallelepiped case disposed on the base 19.

An outdoor heat exchanger 12 is provided on the inner side surface of the casing 11. The outdoor heat exchanger 12 is a device that exchanges heat between the outside air and the refrigerant.

A compressor 131 and a battery 17 (not shown in fig. 1) are provided in the case 11 on the base 19.

A shield plate 21 is provided at an upper portion of the case 11. The outdoor fan 13 is provided in an upper portion of the casing 11 via a shroud 21 so that the blowing direction of air is upward. The outdoor fan 13 is driven by a motor 23 provided on a motor base 22 fixed to the shroud 21.

The discharge port 14 is a member that is provided so as to surround the outer periphery of the outdoor fan 13 and has a cylindrical shape in plan view, and is provided at the upper portion of the casing 11. The outlet 14 functions as an air outlet by the outdoor fan 13.

The nozzle 14 is a duct type having a long dimension in the direction of the rotation axis of the outdoor fan 13 in order to improve the efficiency of the outdoor fan 13. The spout 14 is surrounded and supported by a side cover 31 formed of sheet metal and forming a part of the box 11 and having a rectangular shape in a plan view for safety and design reasons. In addition, the upper portion of the side cover 31 is partially blocked by the upper cover 32.

A part of the space covered by the side cover 31, the upper cover 32, and the spout 14 becomes an electric component box housing space 33. In this example, the electrical component box housing space 33 is provided at two positions at the corner of the side cover 31 (fig. 3).

The electric component box storage spaces 33 store

electric component boxes

34a and 34b, respectively. Conversion boards of electric components, which are high heat generating components, are housed in the

electric component boxes

34a and 34b, respectively. The conversion substrate is basically two types, which are a conversion substrate 35a (first substrate) for driving the compressor 131 and a conversion substrate 35b (second substrate) for driving the outdoor fan 13. The conversion substrate 35a is housed in the electric component box 34a, and the conversion substrate 35b is housed in the electric component box 34b. Heat sinks 36a and 36b, which are members in contact with

conversion substrates

35a and 35b and

cool conversion substrates

35a and 35b, are connected to the outer sides of

electric component boxes

34a and 34b, respectively.

In this way, in the outdoor unit 1, the

electric component boxes

34a and 34b effectively use the space between the discharge ports 14 and the side cover 31 (casing 11), which is the dead space in fig. 7, as the electric component box accommodating space 33 as the accommodating position. The electric component box 34a including the conversion substrate 35a and the heat sink 36a and the electric component box 36b including the conversion substrate 35b and the heat sink 36b are disposed on the side of the nozzle 14.

As shown in fig. 2, an inlet 41 serving as an opening for communicating the outside air with the electric component box housing space 33 is provided in the side cover 31 which also forms a part of the box body 11 below each of the

electric component boxes

34a and 34b. Further, above each of the

electric component boxes

34a and 34b, an outlet 42 serving as an opening for communicating the outside air with the electric component box housing space 33 is provided between the end portion 14a of the spout 14 and the upper cover 32 which is a part of the box body 11. Thereby, the inlet 41 and the outlet 42 as indicated by the arrow a are connected to form a flow path of air passing through the electrical component box housing space 33 (fig. 2). The

radiators

36a and 36b are located in the middle of the respective flow paths. Each outlet 42 is disposed adjacent to the outer surface of the nozzle 14 so that the air discharged from the outlet 42 flows in the same direction as the air blown from the nozzle 14 (upward in fig. 1).

As shown in fig. 2, the side cover 31 and the case 11 have a substantially square shape in plan view. The rotation axis center 13a of the outdoor fan 13 is offset upward in the drawing of fig. 3. That is, wu is the distance from the sheet metal 31a of the side cover 31 corresponding to the upper side in fig. 3 to the sheet metal 31b of the side cover 31 corresponding to the lower side. Further, wf is the distance from the sheet metal 31a to the rotation axis center 13 a. In this case, "Wf < Wu/2".

The operation and effect of embodiment 1 will be described.

By driving the outdoor fan 13, the outside air flows into the casing 11 through the outdoor heat exchanger 12. At this time, the outside air exchanges heat with the refrigerant. The outside air flowing into the casing 11 is blown out through the discharge ports 14 to the upper side of the outdoor unit 1 and discharged. The flow of the outside air in this case is indicated by an arrow b in fig. 2.

When the outdoor air is blown out from the discharge port 14 to the upper side of the outdoor unit 1 and discharged, the air around the outlet 42 adjacent to the discharge port 14 also flows as shown by the arrow a due to the viscous action of the outdoor air flowing as shown by the arrow b, and is entrained in the flow of the outdoor air shown by the arrow b. Such a phenomenon is called a jetting effect. By this ejection effect or an entrainment effect caused by the jet flow sucking in the external fluid, the external air is sucked in from the inlet 41 and discharged from the outlet 42, and an air flow as shown by an arrow "a" is generated.

The air flow of the arrow a passes around the

heat sinks

36a, 36b, and cools the

heat sinks

36a, 36b or the

inverter boards

35a, 35b. And is discharged from the outlet 42.

With such a configuration, the air necessary for cooling the

conversion substrates

35a and 35b, i.e., the air indicated by the arrow "a" does not flow through the outdoor fan 13. The flow of air passing through the arrow b of the outdoor fan 13 is only the flow in which heat exchange in the outdoor heat exchanger 12 is performed. Therefore, the amount of air discharged from the discharge ports 14 by driving the outdoor fans 13 can be reduced, and the power of the outdoor fans 13 can be reduced accordingly, which contributes to reduction in load on the outdoor unit 1 and energy saving. Further, by reducing the amount of air from the discharge ports 14, noise generated by the outdoor fan 13 can be reduced, and the noise can contribute to silencing of the outdoor unit 1.

In addition, since the air indicated by arrow a takes in the outside air having a relatively low temperature, the

conversion substrates

35a and 35b have improved cooling performance, which contributes to improvement in reliability of the outdoor unit 1. For example, in summer season when the temperature of the outside air is high, the air passing through the outdoor heat exchanger 12 at arrow b has a higher temperature than the outside air because the outdoor heat exchanger 12 functions as a condenser. On the other hand, the air of arrow a that does not pass through the outdoor heat exchanger 12 does not.

Further, the improvement in cooling performance can reduce the size of the

radiators

36a and 36b, which contributes to the reduction in manufacturing cost of the outdoor unit 1.

Further, by not disposing the

electrical component boxes

34a and 34b on the upstream side of the air flow indicated by the arrow b, the air flow blown by the outdoor fan 13 is increased while reducing the pressure loss, contributing to an increase in the heat exchange performance of the outdoor heat exchanger 12.

Further, by housing the

conversion substrates

35a and 35b in the different electric component box housing spaces 33, the space for housing the

conversion substrates

35a and 35b can be increased.

The rotational axis center 13a of the outdoor fan 13 is offset upward in fig. 3. This can enlarge the electric component box housing space 33 for housing the

conversion substrates

35a and 35b, and can enlarge the space for housing the

conversion substrates

35a and 35b. In this way, the space for housing the

conversion boards

35a and 35b can be increased, the volume of the

electrical component boxes

34a and 34b can be increased, and the degree of freedom in housing and arrangement of the

conversion boards

35a and 35b and the

heat sinks

36a and 36b can be increased.

Further, although the outdoor unit 1 of the top-blowing type is described in the embodiment 1, the outdoor unit is not limited to the top-blowing type, and may be a lateral-blowing type or the like.

Example 2

Fig. 4 is a vertical sectional view of the upper part of an outdoor unit 1A according to embodiment 2 of the present invention. The same reference numerals as in embodiment 1 are used for the components common to the outdoor unit 1A and the outdoor unit 1 of embodiment 1, and detailed illustration and description are omitted.

The outdoor unit 1A of embodiment 2 is different from the outdoor unit 1 of embodiment 1 in that

radiators

36a and 36b are provided near an outlet 42 of an air flow path indicated by an arrow a.

According to embodiment 2, the flow path of the air indicated by the arrow a has a high flow velocity near the outlet 42 due to the influence of the air flow indicated by the arrow b. Therefore, by providing the

radiators

36a and 36b near the outlet 42, the cooling effect of the

radiators

36a and 36b and the

conversion substrates

35a and 35b can be improved.

Example 3

Fig. 5 is a vertical sectional view of the upper part of an outdoor unit 1B according to embodiment 3 of the present invention. The same reference numerals as in embodiment 1 are used for the components common to the outdoor unit 1B and the outdoor unit 1 of embodiment 1, and detailed illustration and description are omitted. In the drawings, the dimensions and the like are exaggerated and reduced. This is the same in other figures relating to the following embodiments.

The outdoor unit 1B of embodiment 3 is different from the outdoor unit 1 of embodiment 1 in that radiators 36a and 36B are provided near an inlet 41 of an air flow path indicated by an arrow a.

According to embodiment 3, the temperature of the outside air sucked from the inlet 41 is lower on the downstream side of the inlet 41 of the flow path indicated by the arrow "a". Therefore, by providing the

radiators

36a and 36b near the inlet 41, the cooling effect of the

radiators

36a and 36b and the

conversion substrates

35a and 35b can be improved.

Example 4

Fig. 6 is a vertical sectional view of the upper part of an outdoor unit 1C according to embodiment 4 of the present invention. The same reference numerals as in embodiment 1 are used for the components common to the outdoor unit 1C and the outdoor unit 1 of embodiment 1, and detailed illustration and description are omitted.

The outdoor unit 1C of embodiment 4 differs from the outdoor unit 1 of embodiment 1 in that the

radiators

36a and 36b are not provided. In addition, inlets 34a1 and 34b1 communicating the inside of the box body with the inlet 41 are provided near the inlet 41 in the box body of the

electric component box

34a and 34b, respectively. Further, outlets 34a2, 34b2 communicating with the outlets 42 in the box bodies of the

electric component boxes

34a, 34b are provided near the outlets 42, respectively. Further, closing plates 51 are provided between the

electric component boxes

34a, 34b and the spout 14, respectively. The closing plate 51 is a member for closing the flow path indicated by the arrow "a" in example 1. Accordingly, the flow paths of the outside air entering the inlets 34a1 and 34b1 from the

inlets

41 and 41, leaving the outlets 34a2 and 34b2, and being discharged from the

outlets

42 and 42 are formed as indicated by arrows c by the jetting effect and the bypass effect.

Conversion substrates

35a and 35b in the

electrical component boxes

34a and 34b are disposed in the flow paths indicated by the arrows c.

According to embodiment 4, the

conversion substrates

35a and 35b can be directly cooled by the flow of the outside air of the arrow c. Therefore, according to embodiment 4, the manufacturing cost of the outdoor unit 1C can be reduced without the need for the

radiators

36a and 36b.

Example 5

Fig. 7 is a plan view of an outdoor unit 1D according to embodiment 4 of the present invention. The same reference numerals as in embodiment 1 are used for the components common to the outdoor unit 1D and the outdoor unit 1 of embodiment 1, and detailed illustration and description are omitted.

This embodiment 5 is different from embodiment 1 in the following points. The side cover 31 of the outdoor unit 1D and the casing 11 are rectangular in shape in plan view, and the two outdoor fans 13 and the discharge ports 14 are housed in the casing 11 so as to be aligned in the longitudinal direction thereof. The electrical component box housing spaces 33 are respectively provided inside the side cover 31 at intermediate positions of two long sides of the rectangular shape of the side cover 31 in plan view. In fig. 7, the upper cover 32 is removed to show the

electric component boxes

34a and 34b and the

conversion boards

35a and 35b, and the

heat sinks

36a and 36b are also shown. However, the

inlets

41 and 42 are omitted for convenience and are provided in the same manner as in example 1.

The rotary shafts 13a of the outdoor fans 13 are disposed at positions closer to both ends of the rectangular shape than to the center of the rectangular shape. That is, a relationship of "Lf < Lu/4" is established where Lu is the length of the rectangular shape in the longitudinal direction, and Lf is the length from the rotary shaft 13a of each outdoor fan 13 to the end of the rectangular shape in the longitudinal direction immediately before the rectangular shape.

According to embodiment 5, since the positions of the rotary shafts 13a of the outdoor fans 13 are arranged as described above, the volumes of the

electrical component boxes

34a and 34b can be increased, and the degrees of freedom in housing and arrangement of the

conversion substrates

35a and 35b and the

heat sinks

36a and 36b can be increased.

The present invention is not limited to the embodiments described above, and includes various modifications. For example, the above-described embodiments are described in detail to explain the present invention easily and understandably, and do not necessarily have all the structures described. Further, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment. Further, some of the configurations of the embodiments may be added, deleted, or replaced with other configurations.

Description of the symbols

1-outdoor unit (outdoor unit for air conditioner), 11-casing, 12-outdoor heat exchanger, 13-outdoor fan, 13 a-rotation shaft, 14-nozzle, 31-side cover (casing), 35 a-conversion substrate (electric component, first substrate), 35 b-conversion substrate (electric component, second substrate), 36a, 36 b-radiator (component in contact with electric component), 41-inlet, 42-outlet, 100-air conditioner, 101-indoor heat exchanger, 102-indoor fan, 103-expansion valve, 131-compressor, a-flow path.

Claims

1. An outdoor unit for an air conditioner, characterized in that,

the disclosed device is provided with:

a box body;

an outdoor heat exchanger disposed in the case and configured to exchange heat between external air and a refrigerant;

an outdoor fan disposed in the case;

a nozzle opening surrounding an outer periphery of the outdoor fan and forming an air outlet for the outdoor fan;

an electric element disposed in a space between a side of the nozzle and an inner side of the case; and

an inlet and an outlet are provided in the case so as to open to the outside of the case and form a flow path for circulating air passing through the electric component or a component in contact with the electric component,

the outlet is disposed adjacent to the nozzle opening so that the direction of the air blown out from the nozzle opening is directed toward the same direction side.

2. The outdoor unit of claim 1, wherein,

two substrates including a first substrate and a second substrate are provided as the electric device,

both the first substrate and the second substrate are disposed in a region between the nozzle and the case.

3. The outdoor unit of claim 1 or 2, wherein,

the above-mentioned outdoor fan is of an upward blowing type,

the box body is rectangular in plan view, and two outdoor fans are accommodated and arranged in a manner of being arranged in the length direction,

the rotation shaft of each outdoor fan is disposed at a position closer to both ends than the rectangular center portion.

4. An outdoor unit of an air conditioner according to claim 1 or 2,

a heat sink is provided as a member contacting the electric device,

the radiator is disposed in the vicinity of the outlet of the flow path.

5. An outdoor unit of an air conditioner according to claim 1 or 2,

a heat sink is provided as a member contacting the electric device,

the heat sink is disposed in the vicinity of the inlet of the flow path.

6. An outdoor unit of an air conditioner according to claim 1 or 2,

the electrical component is disposed in the flow path.

7. An air conditioner characterized in that it comprises a casing,

the disclosed device is provided with:

an outdoor unit of an air conditioner according to any one of claims 1 to 6;

a compressor for compressing the refrigerant;

an expansion valve for decompressing the refrigerant;

an indoor heat exchanger for performing heat exchange between the refrigerant and indoor air; and

and an indoor fan for supplying the indoor air to the indoor heat exchanger.