WO2021166237A1

WO2021166237A1 - Outdoor unit and air conditioner equipped with same

Info

Publication number: WO2021166237A1
Application number: PCT/JP2020/007173
Authority: WO
Inventors: 宏文小▲崎▼; 講平江藤; 公人西川; 智基稲垣
Original assignee: 三菱電機株式会社
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2021-08-26
Also published as: JP7325600B2; JPWO2021166237A1

Abstract

This outdoor unit includes a compressor installed on the bottom of a housing, an outdoor heat exchanger installed along the inner peripheral surface of the upper portion of the housing, an outdoor blower installed on the upper portion of the housing and supplying air to the outdoor heat exchanger, and a control unit for controlling the compressor and the outdoor blower, the outdoor unit comprising: an active filter unit having an active filter for suppressing harmonics generated from the control unit, and a case for accommodating the active filter; and an attachment part for attaching the active filter unit, wherein the active filter unit is attached to the outer peripheral surface of the housing via the attachment part so as to be capable of changing the distance of a gap formed between the active filter unit and the outer peripheral surface. This makes it unnecessary to install the active filter unit inside the housing of the outdoor unit, makes it possible to eliminate overcrowding of other component arrangements in the housing of the outdoor unit to an extent corresponding to the freed-up installation space of the active filter unit, and makes it possible to achieve improvement of cooling efficiency of each component.

Description

Outdoor unit and air conditioner equipped with it

The present disclosure relates to an outdoor unit equipped with an active filter and an air conditioner equipped with the outdoor unit.

Generally, an outdoor unit used in an air conditioner has a rectangular parallelepiped housing, and a compressor, an outdoor unit heat exchanger into which the refrigerant sucked into the compressor flows into the housing, and the like. It is equipped with a controller equipped with an inverter that controls the drive of the actuator including the actuator. In addition to this, the outdoor unit is an outdoor blower that emits heat generated from the outdoor unit heat exchanger and controller inside the housing, and a harmonic suppression device that suppresses the harmonics generated by the inverter. Etc. (see, for example, Patent Document 1).

Here, the harmonic suppression device prevents the harmonic current generated by the inverter device that controls the rotation speed of the compressor from adversely affecting the power system that supplies power to the air conditioner and other equipment. Also called an active filter. Further, the harmonic suppression device housing containing the active filter is also referred to as a filter case, and these are also generally referred to as an active filter unit.

Since the compressor is a heavy object, it is often fixed to the bottom of the housing of the outdoor unit. Further, the outdoor blower is often attached to the inside of the housing or the ceiling side of the housing. Further, the controller and the active filter are often mounted on the upper part of the housing in order to avoid the influence of flooding or snowfall. The active filter may be retrofitted as an option, and is often attached to the upper part of the housing from the viewpoint of facilitating the installation work.

Japanese Patent No. 5794816

By the way, in the outdoor unit described in Patent Document 1, an active filter is installed inside the housing, and an electric component box including each drive circuit of a compressor and an outdoor blower is also installed inside the housing. However, in order to additionally attach an active filter that reduces the harmonics generated by the inverter in addition to the compressor control inverter, it is necessary to secure a space for the active filter in advance inside the housing. Further, the flow path of the cooling air to the electrical component box is formed inside the housing, and when the active filter is arranged inside the housing, the flow path of the cooling air to the active filter is also formed inside the housing. I needed it.

As described above, in the outdoor unit of Patent Document 1, since the active filter unit is installed inside the housing, it is necessary to secure an installation space for the active filter unit, and the arrangement of parts inside the housing of the outdoor unit is overcrowded. There was a problem of becoming. In addition, as the arrangement of parts inside the housing becomes overcrowded, there is a risk that the cooling efficiency when cooling each part will also decrease.

Therefore, the present disclosure is for solving the above-mentioned problems, and is an outdoor unit capable of eliminating the overcrowded state of component arrangement inside the housing of the outdoor unit and improving the cooling efficiency of each component. It is an object of the present invention to provide an air conditioner equipped with it.

The outdoor unit according to the present disclosure includes a housing constituting the outer shell, a compressor installed at the bottom of the housing to compress the refrigerant, and outdoor heat installed along the inner peripheral surface of the upper part of the housing. It has a exchanger, an outdoor blower installed on the upper part of the housing and supplying air to the outdoor heat exchanger, and a control unit attached to the housing and controlling the compressor and the outdoor blower. An outdoor unit comprising an active filter unit having an active filter for suppressing harmonics generated from the control unit, a case for accommodating the active filter, and a mounting portion for mounting the active filter unit. The active filter unit is such that the distance between the outer peripheral surface and the outer peripheral surface of the housing can be variably attached to the outer peripheral surface of the housing via the attachment portion.

Further, the air conditioner according to the present disclosure includes the above-mentioned outdoor unit and an indoor unit having an indoor heat exchanger, and the indoor heat exchanger and the outdoor heat exchanger are connected by piping to form a refrigerant circuit. Is.

According to the present disclosure, it is possible to eliminate the need to install the active filter unit inside the housing of the outdoor unit. Therefore, since the installation space of the active filter unit is freed up, it is possible to eliminate the overcrowded state of the component arrangement inside the housing of the outdoor unit, and it is possible to improve the cooling efficiency of each component.

It is a schematic diagram which shows the refrigerant circuit of the air conditioner provided with the outdoor unit which concerns on Embodiment 1. FIG. It is a perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 1 as seen from the front. It is a perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 1 as seen from the back. It is a perspective view which shows the state which removed the housing of the outdoor unit of FIG. It is explanatory drawing which enlarges and shows a part of the outdoor heat exchanger of the outdoor unit of FIG. It is a perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 1, and is provided for the explanation of attachment of an active filter unit. It is an exploded perspective view which shows the active filter mounted on the outdoor unit which concerns on Embodiment 1. FIG. It is an exploded perspective view which shows the active filter unit of FIG. It is explanatory drawing which shows the active filter unit of FIG. 6 see through. It is a perspective view provided for the description of the attachment part in the active filter unit of FIG. It is a perspective view which shows the side bar in the attachment part of FIG. It is a perspective view which shows the modification of the sidebar which concerns on Embodiment 1. FIG. It is explanatory drawing which provides the calculation of the air volume area in the outdoor heat exchanger of the existing outdoor unit. It is explanatory drawing which provides the calculation of the air volume area in the outdoor heat exchanger of the outdoor unit which concerns on Embodiment 1. FIG. It is explanatory drawing which provides the calculation of the air volume area in the outdoor heat exchanger when the active filter unit is installed separated by arbitrary dimensions in front of the outer wall of the outdoor heat exchanger. It is a front view which shows the outdoor unit which concerns on Embodiment 2. FIG. It is a front view which shows the outdoor unit which concerns on Embodiment 2. FIG. It is a front view which shows the outdoor unit which concerns on Embodiment 2. FIG. It is a perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 3. FIG. It is a side view which shows the appearance of the outdoor unit which concerns on Embodiment 3. FIG. It is a perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 3. FIG. It is a side view which shows the appearance of the outdoor unit which concerns on Embodiment 3. FIG. It is a perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 4. FIG. It is a rear perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 4. FIG. It is an exploded perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 5. It is a perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 5. It is an exploded perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 5. It is an exploded perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 5. It is a perspective view which shows the pillar in the attachment part of FIG. 28 enlarged. It is an exploded perspective view which shows the appearance of the outdoor unit which concerns on Embodiment 5.

Hereinafter, an embodiment of the outdoor unit and the air conditioner provided with the outdoor unit according to the present disclosure will be described with reference to the attached drawings. The forms of the components shown in the full text of the specification and the drawings are merely examples and are not limited to these descriptions. That is, the present disclosure can be appropriately modified to the extent that it does not contradict the gist or idea that can be read from the scope of claims and the entire specification. In addition, an outdoor unit with such a change and an air conditioner equipped with the outdoor unit are also included in the technical idea of the present disclosure. Further, in each figure, those having the same reference numerals are the same or equivalent thereof, which are common in the whole text of the specification.

Embodiment 1.
<Structure of air conditioner 200>
The air conditioner 200 as a refrigeration cycle device including the outdoor unit 1 according to the first embodiment will be described with reference to FIG. The outdoor unit 1 according to the first embodiment is configured as a part of the air conditioner 200. FIG. 1 is a schematic view showing a refrigerant circuit 204 of an air conditioner 200 provided with an outdoor unit 1 according to a first embodiment.

As shown in FIG. 1, the air conditioner 200 according to the first embodiment cools or heats the air in the room by transferring heat between the outside air and the air in the room via a refrigerant. It has an outdoor unit 1 and an indoor unit 201.

Examples of the refrigerant flowing through the air conditioner 200 include various refrigerants such as R32 refrigerant, R290 refrigerant which is a low GWP refrigerant, the above-mentioned mixed refrigerant containing R32 refrigerant as a main component, and mixed refrigerant containing R290 refrigerant as a main component. Refrigerant can be applied. Further, a refrigerant having a smaller gas density than an R32 refrigerant or an R410A refrigerant such as an olefin-based refrigerant, propane or DME (dimethyl ether) has a higher refrigerant flow velocity per capacity, and therefore has a great effect of improving performance by reducing pressure loss. Examples of the olefin-based refrigerant include HFO1234yf, HFO1234ze (E), and the like. Further, as the refrigerating machine oil, an alkylbenzene oil type, an ester oil type, an ether oil type or the like is used.

In the air conditioner 200, the outdoor unit 1 and the indoor unit 201 are connected to each other via the

refrigerant pipes

203, 203a, and 203b to form a refrigerant circuit 204 in which the refrigerant circulates. The refrigerant circuit 204 is provided with a compressor 4, a flow path switching device 202, an outdoor heat exchanger 8, an expansion valve 205 and an indoor heat exchanger 206, and these are connected via the

refrigerant pipes

203, 203a and 203b. There is.

The outdoor unit 1 has a compressor 4, a flow path switching device 202, an outdoor heat exchanger 8, and an expansion valve 205. The compressor 4 compresses and discharges the sucked refrigerant. In this case, the compressor 4 includes an inverter device 4a. In the compressor 4 provided with the inverter device 4a, the operating frequency is changed by the control unit 6, and the capacity of the compressor 4 can be changed. The capacity of the compressor 4 is the amount of refrigerant delivered per unit time.

The flow path switching device 202 is, for example, a four-way valve, which switches the direction of the refrigerant flow path. The air conditioner 200 can realize a heating operation or a cooling operation by switching the flow of the refrigerant by using the flow path switching device 202 based on the instruction from the control unit 6. The outdoor heat exchanger 8 exchanges heat between the refrigerant and the outdoor air. Further, the outdoor heat exchanger 8 is provided with an outdoor blower 5 in order to improve the efficiency of heat exchange between the refrigerant and the outdoor air. An inverter device 208a is attached to the outdoor blower 5. In this case, the inverter device 208a changes the rotation speed of the fan by changing the operating frequency of the fan motor 208, which is the drive source of the outdoor blower 5, by the control unit 6. The outdoor blower 5 is not limited to this as long as the same effect can be obtained. For example, the type of fan may be a sirocco fan or a plug fan. Further, the outdoor blower 5 may be a push-in type or a pull-type type.

Here, the outdoor heat exchanger 8 functions as an evaporator during the heating operation, and exchanges heat between the low-pressure refrigerant flowing in from the refrigerant pipe 203b side and the outdoor air to evaporate the refrigerant and vaporize it. And let it flow out to the suction side of the compressor 4. Further, the outdoor heat exchanger 8 functions as a condenser during the cooling operation, and the refrigerant compressed by the compressor 4 flowing in from the refrigerant pipe 203a side via the flow path switching device 202 and the outdoor air. Heat exchange is performed between the refrigerants to condense and liquefy the refrigerant, and the refrigerant flows out to the refrigerant pipe 203b side. Although the case where the outdoor air is used as the external fluid has been described here as an example, the external fluid is not limited to the gas containing the outdoor air, and may be a liquid containing water.

The expansion valve 205 is a throttle device that controls the flow rate of the refrigerant, and adjusts the pressure of the refrigerant by adjusting the flow rate of the refrigerant flowing through the refrigerant pipe 203 by changing the opening degree of the expansion valve 205. During the cooling operation, the expansion valve 205 expands the high-pressure liquid state refrigerant into the low-pressure gas-liquid two-phase state refrigerant to reduce the pressure. The expansion valve 205 is not limited to this, and an electronic expansion valve, a capillary tube, or the like may be used as long as the same effect can be obtained. For example, when the expansion valve 205 is composed of an electronic expansion valve, the opening degree is adjusted based on the instruction of the control unit 6.

The indoor unit 201 includes an indoor heat exchanger 206 that exchanges heat between the refrigerant and the indoor air, and an indoor blower 207 that adjusts the flow of air that the indoor heat exchanger 206 exchanges heat with.

The indoor heat exchanger 206 acts as a condenser during the heating operation, exchanges heat between the refrigerant flowing in from the refrigerant pipe 203a side and the indoor air, condenses the refrigerant and liquefies it, and causes the refrigerant pipe. Let it flow out to the 203b side. Further, the indoor heat exchanger 206 functions as an evaporator during the cooling operation. The indoor heat exchanger 206 exchanges heat between the refrigerant that has been made low pressure by the expansion valve 205 that has flowed in from the refrigerant pipe 203b side and the indoor air, and causes the refrigerant to take away the heat of the air and evaporate it. It is vaporized and flows out to the refrigerant pipe 203a side. Although the case where the indoor air is used as the external fluid has been described here as an example, the external fluid is not limited to the gas containing the indoor air, and may be a liquid containing water.

The operating speed of the indoor blower 207 is determined by the user's settings. An inverter device may be attached to the indoor blower 207, and it is preferable to change the operating frequency of the fan motor 209 to change the rotation speed of the fan. The indoor blower 207 is not limited to this as long as the same effect can be obtained. For example, the type of fan may be a sirocco fan or a plug fan. Further, the indoor blower 207 may be a pushing type or a pulling type.

<Operation example of air conditioner 200>
Next, the operation of the cooling operation will be described as an operation example of the air conditioner 200. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 4 flows into the outdoor heat exchanger 8 via the flow path switching device 202. The gas refrigerant that has flowed into the outdoor heat exchanger 8 is condensed by heat exchange with the outside air blown by the outdoor blower 5, becomes a low-temperature refrigerant, and flows out of the outdoor heat exchanger 8. The refrigerant flowing out of the outdoor heat exchanger 8 is expanded and depressurized by the expansion valve 205 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. This gas-liquid two-phase refrigerant flows into the indoor heat exchanger 206 of the indoor unit 201, evaporates by heat exchange with the indoor air blown by the indoor blower 207, becomes a low-temperature low-pressure gas refrigerant, and becomes an indoor heat exchanger. Outflow from 206. At this time, the indoor air that has been cooled by being absorbed by the refrigerant becomes air-conditioned air (blown air) and is blown out from the indoor unit 201 into the room that is the air-conditioned space. The gas refrigerant flowing out of the indoor heat exchanger 206 is sucked into the compressor 4 via the flow path switching device 202 and compressed again. In the cooling operation of the air conditioner 200, the above operation is repeated (indicated by the solid arrow in FIG. 1).

Next, the operation of the heating operation will be described as an operation example of the air conditioner 200. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 4 flows into the indoor heat exchanger 206 of the indoor unit 201 via the flow path switching device 202. The gas refrigerant flowing into the indoor heat exchanger 206 is condensed by heat exchange with the indoor air blown by the indoor blower 207, becomes a low-temperature refrigerant, and flows out from the indoor heat exchanger 206. At this time, the indoor air that has been warmed by receiving heat from the gas refrigerant becomes conditioned air (blow-out air) and is blown out from the indoor unit 201 into the room. The refrigerant flowing out of the indoor heat exchanger 206 is expanded and depressurized by the expansion valve 205 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. This gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 8 of the outdoor unit 1, evaporates by heat exchange with the outside air blown by the outdoor blower 5, becomes a low-temperature low-pressure gas refrigerant, and becomes the outdoor heat exchanger 8. Outflow from. The gas refrigerant flowing out of the outdoor heat exchanger 8 is sucked into the compressor 4 via the flow path switching device 202 and compressed again. In the heating operation of the air conditioner 200, the above operation is repeated (indicated by the broken line arrow in FIG. 1).

<Configuration of outdoor unit 1>
Next, the configuration of the outdoor unit 1 according to the first embodiment will be described with reference to FIGS. 2 to 9. FIG. 2 is a perspective view showing the appearance of the outdoor unit 1 according to the first embodiment as viewed from the front. FIG. 3 is a perspective view showing the appearance of the outdoor unit 1 according to the first embodiment as viewed from the rear. FIG. 4 is a perspective view showing a state in which the housing 2 of the outdoor unit 1 of FIG. 2 is removed. FIG. 5 is an enlarged explanatory view showing a part of the outdoor heat exchanger 8 of the outdoor unit 1 of FIG. FIG. 6 is a perspective view showing the appearance of the outdoor unit 1 according to the first embodiment and used for explaining the installation of the active filter unit 20. FIG. 7 is an exploded perspective view showing an active filter 14 mounted on the outdoor unit 1 according to the first embodiment. FIG. 8 is an exploded perspective view showing the active filter unit 20 of FIG. FIG. 9 is an explanatory diagram showing the active filter unit 20 of FIG. 6 seen through.

As shown in FIGS. 2 and 3, the outdoor unit 1 includes a housing 2 that constitutes an outer shell, a compressor 4 that is installed at the bottom of the housing 2 and compresses a refrigerant, and an inner circumference of the upper portion of the housing 2. It has an outdoor heat exchanger 8 installed along the surface. Further, the outdoor unit 1 is installed on the upper part of the housing 2 and is attached to the outdoor blower 5 for supplying air to the outdoor heat exchanger 8 and the compressor 4 side of the housing 2, and the compressor 4 and the outdoor blower 5 are attached. It has a control unit 6 for controlling the above.

The housing 2 is provided with a machine room 3 at the lower part of the inside. In the machine room 3, a compressor 4 capable of controlling an inverter, a control unit 6 having an inverter for controlling the compressor 4 and the outdoor blower 5, and an electrical component unit 7 are installed. An outdoor heat exchanger 8 into which the refrigerant discharged from the compressor 4 or sucked into the compressor 4 flows is provided in the upper part of the inside of the housing 2, that is, the upper part of the machine room 3, and further above the outdoor heat exchanger 8. Is provided with an outdoor blower 5 that supplies air to the outdoor heat exchanger 8. That is, the outdoor unit 1 is composed of three high-rise buildings including a lower part where the machine room 3 is provided, an upper part where the outdoor heat exchanger 8 is provided, and a top part where the outdoor blower 5 is provided.

In the case of the first embodiment, the housing 2 has a rectangular parallelepiped shape, and in order to improve the performance (heat exchange efficiency) of the outdoor heat exchanger 8, the four side surfaces of the housing 2 are open side, and the inside is set. A pair of outdoor heat exchangers 8 are installed in an L shape along the inner peripheral surface of the above. In other words, the housing 2 has at least all the upper surfaces on which the outdoor heat exchanger 8 is arranged, that is, all four surfaces are open, and along the inner peripheral surfaces of all the four opened surfaces. The outdoor heat exchangers 8 are provided in a pair in an L shape. That is, as shown in FIG. 4, a pair of L-shaped outdoor heat exchangers 8 are installed in a hollow rectangular parallelepiped shape. The shape of the outdoor heat exchanger 8 is not limited to the L shape, and for example, a flat shape may be installed in an arbitrary number along the inner peripheral surfaces of the four open side surfaces of the housing. ..

As shown in FIG. 5, the outdoor heat exchanger 8 is configured to include a plurality of pipes 11 through which the refrigerant 10 passes, and a plurality of fins 12 arranged orthogonally to these pipes 11. In this case, the pipes 11 are arranged in two rows so that those arranged in the vertical direction at preset intervals are alternately arranged in the front-rear direction. Further, a plurality of fins 12 are arranged in the longitudinal direction of the plurality of pipes 11 at preset intervals. As described above, the outdoor heat exchanger 8 exchanges heat between the refrigerant 10 flowing in the pipe 11 and the outside air 13 flowing on the surfaces of the pipe 11 and the fins 12. Further, the outside air 13 that has undergone heat exchange is discharged from the upper part of the housing 2 to the outside together with the heat generated in the machine room 3 (see FIG. 2 and the like) (see FIGS. 2 and 4).

Here, in general, the harmonic current generated by the inverter device may cause problems such as load failure, overheating, malfunction, or shortened life in a factory connected to the same distribution line. Similarly, in an office building or a general household, problems such as flickering of lighting or TV and malfunction of OA equipment or computer built-in equipment may be caused.

In order to avoid the occurrence of such a problem, the outdoor unit 1 of the first embodiment is provided with the active filter unit 20 via the mounting portion 21 as shown in FIG. The active filter unit 20 has an active filter 14 for suppressing harmonics generated by a control unit 6 that controls the

inverter devices

4a and 208a of FIG. 1 described above.

Specifically, as shown in FIG. 6, the outdoor unit 1 according to the first embodiment has an active filter unit 20 at a position facing the front side of the outdoor heat exchanger 8 on the outer peripheral surface of the upper part of the housing 2. Is variably attached to the distance of the space 24 formed between the outer peripheral surface and the outer peripheral surface. As shown in FIGS. 6 and 7, the active filter unit 20 includes an active filter 14 that suppresses harmonics generated from the control unit 6 (see FIG. 1), and a case 20a that houses the active filter 14. In such an active filter unit 20, the distance of the space 24 formed between the active filter unit 20 and the outer peripheral surface of the upper portion of the housing 2 is variably attached by the attachment portion 21. Although the details will be described later, the mounting portion 21 is arranged so as to be orthogonal to the pair of pillars 22 mounted in the vertical direction on the outer peripheral surface of the housing 2 and the pair of pillars 22, and the active filter unit 20 and the pair of pillars 22. For example, a pair of sidebars 23 and a pair of sidebars 23 are provided. The sidebar 23 is for mounting the active filter unit 20 so that the distance of the space 24 formed between the active filter unit 20 and the outer peripheral surface of the housing 2 can be adjusted.

The active filter 14 detects harmonic currents generated by the loads of the

inverter devices

4a and 208a, outputs currents of the same magnitude and opposite phases (compensation currents), and cancels the harmonics to reduce harmonics. It is a device. As shown in FIG. 7, the active filter 14 includes an active filter substrate 15, a radiator (not shown) for cooling the active filter substrate 15, a cooling fan 16 for an active filter, and a filter case 17 accommodating these components. And are configured with.

The active filter substrate 15 includes a harmonic suppression control circuit 151 that detects harmonic components based on the detected power supply current and power supply voltage and generates a command signal that suppresses harmonics, and a harmonic suppression control circuit 151. A harmonic suppression drive circuit 153 equipped with a power module 152 that generates a current that cancels the harmonic current of the commercial power supply based on the output is provided. Further, the active filter substrate 15 includes a ripple filter circuit 154 that suppresses ripples superimposed on the power supply voltage generated when the power module 152 is driven, and a noise filter circuit 155 that suppresses noise induced by the power supply voltage. , A capacitor 156 that stabilizes the DC power supply is provided. Further, the active filter substrate 15 is provided with a reactor 157 for the purpose of boosting the DC voltage.

The active filter cooling fan 16 cools the active filter substrate 15. Specifically, the active filter cooling fan 16 cools various components mounted on the active filter substrate 15.

The filter case 17 has a rectangular box shape, and houses the active filter substrate 15, the cooling fan 16 for the active filter, and the like. The filter case 17 is formed with an intake port 18 for taking in outside air and an exhaust port 19 for discharging the taken in outside air. The outside air taken in from the suction port 18 by the cooling fan 16 for the active filter is discharged from the exhaust port 19 after cooling the active filter substrate 15 to exhaust the heat in the filter case 17.

As shown in FIGS. 8 and 9, the case 20a of the active filter unit 20 accommodating the active filter 14 has a rectangular box shape, and has a base 20A arranged on the housing 2 side and a cover attached to the base 20A. It has 20B and.

The outdoor unit 1 is often installed outdoors, and in order to protect the active filter unit 20 attached to the outer peripheral surface of the housing 2 from damage such as rain or snow, a waterproof base 20A and a cover 20B are provided. It is housed and attached in the case 20a to be held.

The active filter 14 is attached to the base 20A with screws or the like. The base 20A is provided with an exhaust duct 29. Further, on the base 20A, a cable 30 for connecting the active filter 14 and the control unit 6 and the electrical component unit 7 arranged in the machine room 3 below the housing 2 shown in FIG. 2 is arranged, and above the cable 30. The cover 20B is attached to the base 20A with screws or the like so as to cover the cover 20A.

The cover 20B is formed with a cover suction hole 31 so that outside air (air) can be taken in from the suction port 18 of the filter case 17 by the cooling fan 16 for the active filter provided in the active filter 14. In this case, although the case where the cover suction hole 31 is formed on the lower side located below the cover 20B in consideration of preventing the intrusion of rain or snow is shown, the cover suction hole 31 is formed. The position to be played is not limited to this. For example, the position of the cover suction hole 31 may be set as appropriate as long as it does not allow rain or snow to directly enter the suction port 18 of the active filter 14.

If it is necessary to take measures against rain or snow entering the cover suction hole 31, a shielding plate 281 may be provided above the cover suction hole 31 as shown in FIG. As a result, a maze structure is configured in which the air passage of the outside air 13 flowing in from the cover suction hole 31 can be turned back at least once, and it is possible to prevent rain or snow from directly entering from the cover suction hole 31. can. Further, such a shielding plate 281 may be made of sheet metal, resin or the like. Further, if measures are taken to prevent rain or snow from entering the active filter 14, a cover suction hole 31 may be provided near the suction port 18 in the active filter 14.

Further, the shape of the cover suction hole 31 is such that pests such as cockroaches or geckos invade and cause damage such as short circuit between conductive different electrodes in the active filter substrate 15 or ignition, smoke or electric shock due to creeping discharge of the active filter substrate 15. It is preferable to form a shape in consideration of prevention. For example, the cover suction hole 31 is formed of a lattice hole having a round hole shape with a diameter of 3 mm or less. When measures are taken to prevent intrusion of cockroaches or geckos on the active filter 14 side, the shape of the cover suction hole 31 may be determined by the cooling performance of the active filter 14, and is not limited to the shape.

Further, a base exhaust hole 32 for exhaust is also formed on the base 20A side. The hole shape of the base exhaust hole 32 is the same as that of the cover suction hole 31, and a hole having a shape that can prevent the invasion of cockroaches, geckos, etc. is provided. As shown in FIG. 9, when the exhaust port 19 on the active filter 14 side is provided with measures to prevent intrusion of cockroaches or geckos, the shape of the base exhaust hole 32 is the same as that of the cover suction hole 31. It may be determined by the cooling performance of 14, and it is not necessary to be bound by the shape.

The outside air 13 of the outdoor unit 1 that has flowed in from the cover suction hole 31 located below the cover 20B of the case 20a is cooled air 33 inside from the suction port 18 of the active filter 14 by the cooling fan 16 for the active filter of the active filter 14. Is sucked as. The cooling air 33 cools the active filter substrate 15 and the like in the active filter 14, and then is discharged into the case 20a from the exhaust port 19 of the active filter 14. Then, the cooling air 33 discharged into the case 20a flows through the exhaust duct 29 provided in the base 20A, passes through the base exhaust hole 32 formed in the base 20A, and is on the outdoor heat exchanger 8 side in the case 20a. It has a structure that is discharged to the outside. After the cooling air 33 is discharged from the case 20a to the outside, the cooling air 33 is sucked into the outdoor heat exchanger 8 side by the outdoor blower 5 provided in the housing 2. Since the outdoor blower 5 has a very strong force of sucking into the outdoor heat exchanger 8, the effect of promoting the flow of the cooling air 33 in the case 20a can be obtained.

Further, the cooling air 33 is heated by cooling the active filter 14 after being discharged from the case 20a. However, the effect of the heat of the cooling air 33 on the outdoor heat exchanger 8 is that the area of the heated cooling air 33 is very small with respect to the surface area (heat exchange area) of the outdoor heat exchanger 8. , There is no problem in the performance of the outdoor heat exchanger 8.

Further, the cooling air 33 is prevented from directly entering the active filter 14 from the back side of the base 20A of the case 20a, that is, the outdoor heat exchanger 8 side, through the exhaust port 19 of the active filter 14. The exhaust duct 29 of the above is provided. The exhaust duct 29 has an oblique shape so that the exhaust flow path of the cooling air 33 is bent. Further, by providing the exhaust duct 29, the heat of the cooling air 33 having heat leaks into the case 20a, and a short cycle that enters the suction port 18 of the active filter 14 is prevented.

Further, the heat generated by the active filter 14 itself raises the temperature of the atmosphere inside the case 20a, which may raise the temperature of the outside air 13 entering the case 20a. Therefore, the temperature of the cooling air 33 may also rise. In order to prevent them, the base 20A is formed with a ventilation hole 35 in addition to the base exhaust hole 32. The structure is such that the heat in the case 20a generated by the temperature rise of the active filter 14 is sucked into the outdoor heat exchanger 8 side through the ventilation hole 35 by the outdoor blower 5 included in the housing 2. As a result, it is possible to obtain the effect of suppressing the temperature rise of the outside air 13 of the outdoor unit 1 flowing in from the cover suction hole 31. It is necessary to consider the position and shape of the ventilation hole 35 so as not to interfere with the suction of the active filter cooling fan 16 of the active filter 14.

Next, the mounting portion 21 will be described with reference to FIGS. 10 to 12. FIG. 10 is a perspective view for explaining the mounting portion 21 in the active filter unit 20 of FIG. FIG. 11 is a perspective view showing the sidebar 23 in the mounting portion 21 of FIG. FIG. 12 is a perspective view showing a modified example of the sidebar 23 according to the first embodiment.

As shown in FIG. 10, the mounting portion 21 is arranged so as to be orthogonal to the pair of pillars 22 mounted in the vertical direction on the outer peripheral surface of the housing 2 and the pair of pillars 22, and the active filter unit 20 and the pair of pillars. A sidebar 23 for connecting the 22 is provided. That is, since the pair of pillars 22 can be appropriately attached to any position on the outer peripheral surface of the housing 2, and the sidebar 23 can be appropriately attached to the pair of pillars 22, the active filter unit. Reference numeral 20 can be attached to an arbitrary position on the outer peripheral surface of the upper portion of the housing 2.

In particular, since the active filter unit 20 is not always provided and is an optional retrofit component, it is preferable to install it on the upper part of the housing 2 from the viewpoint of facilitating the installation work. This can also be said from the viewpoint of improving the efficiency of maintenance work. When the active filter unit 20 is installed on the upper part of the housing 2, it faces the outdoor heat exchanger 8 installed on the upper part inside the housing 2. At this time, if a space is not formed between the outdoor heat exchanger 8 and the active filter unit 20, there is a concern that the active filter unit 20 may hinder the inflow of the outside air 13 taken in by the outdoor heat exchanger 8. Therefore, in the first embodiment, a space 24 is formed between the active filter unit 20 and the outer peripheral surface of the housing 2 at the installation position.

Here, as the outdoor unit 1, there are outdoor units 1 having various appearance sizes due to the difference in the capacity (performance) of the air conditioner 200. Therefore, it is conceivable that the space 24 in front of the outer wall of the outdoor heat exchanger 8 also has individual dimensional differences for each model.

Therefore, in order to adapt the mounting position of the active filter unit 20 to the distance of the space 24 different for each model, further reduce the number of parts of the active filter unit 20 as much as possible, and reduce the cost of parts, the sidebar 23 is configured. Was as follows. That is, the sidebar 23 adjusts the mounting position of the active filter unit 20 to an arbitrary position for adapting to the space 24 of each model.

The sidebar 23 is for mounting the active filter unit 20 so that the distance of the space 24 formed between the active filter unit 20 and the outer peripheral surface of the housing 2 can be adjusted. In other words, the sidebar 23 requires a space 24 formed between the active filter unit 20 and the front of the outer wall of the outdoor heat exchanger 8 of the housing 2 in which the active filter unit 20 is installed. It is for securing with.

As shown in FIG. 11, the sidebar 23 has a main body portion 231 and sidebar plates 232 which are a pair of leg portions arranged at both ends in the longitudinal direction of the main body portion 231. In the case of the first embodiment, each sidebar plate 232 is formed separately from the main body portion 231 and is integrally assembled by a screw 36 or the like. By adjusting the length of each sidebar plate 232, the distance of the space 24 formed between the outer peripheral surface of the upper portion of the housing 2 and the active filter unit 20 is changed. Specifically, when adjusting the length of the sidebar plate 232, the sidebar plate 232 is replaced with a sidebar plate 232 having a length corresponding to the desired distance of the space 24.

The dimension H of the sidebar plate 232 is manufactured with a length that matches the distance of the space 24 required for each model size. Therefore, since the distance of the space 24 can be changed only by exchanging the sidebar plate 232, the mounting portion 21 can be shared except for the sidebar plate 232 of the active filter unit 20. Further, by using such a mounting portion 21, the active filter unit 20 can be mounted at all positions including the position facing the front side of the outdoor heat exchanger 8 on the outer peripheral surface of the upper portion of the housing 2. be.

In the case of the first embodiment, the case where the sidebar plate 232 is molded separately from the main body portion 231 has been described, but the configuration of the sidebar 23 is not limited to this. That is, the sidebar plate 232 of the sidebar 23 may be integrally molded with the main body portion 231.

For example, with respect to the space 24 in front of the outer wall of the outdoor heat exchanger 8 in the housing 2, it is considered that the smaller the air volume area of the outdoor heat exchanger 8 is, the greater the influence of the arrangement of the active filter unit 20 is. Therefore, the one having the largest space 24 is the outdoor unit 1 having the smallest air volume area of the outdoor heat exchanger 8. Therefore, when it is possible to make the space 24 of the outdoor unit 1 having a small air volume area of the outdoor heat exchanger 8 and the space 24 of other outdoor units 1 of different sizes the same, that is, the outdoor heat exchange in the housing 2. When unifying the amount of protrusion of the active filter unit 20 in front of the outer wall of the vessel 8, it is not necessary to provide the sidebar plate 232 separately.

In this case, as shown in FIG. 12, at both ends of the main body 231 of the sidebar 23 in the longitudinal direction, the same shape as the sidebar plate 232 having a length corresponding to the desired distance of the space 24 is integrated with the main body 231. Mold into. As a result, the number of parts of the sidebar 23 can be deleted because the sidebar plate 232 as a separate body is not required.

As described above, the outside air 13 drawn from the outside by the outdoor blower 5 exchanges heat with the refrigerant 10 flowing in the pipe 11 when passing between the adjacent fins 12 of the outdoor heat exchanger 8. Then, the outside air 13 after the heat exchange is discharged to the outside by the outdoor blower 5 (see FIGS. 4 and 5). The performance of the outdoor heat exchanger 8 is the heat exchange between the refrigerant 10 flowing in the pipe 11 and the outside air 13 generated by the outdoor blower 5 and passing between the adjacent fins 12 integrally connected to the pipe 11. Depends on efficiency. Therefore, it is advantageous for the efficiency of the outdoor heat exchanger 8 to pass (apply) a large amount of the air volume of the outside air 13 by the outdoor blower 5 to the outdoor heat exchanger 8. However, in the existing outdoor unit 1, when the active filter unit 20 is attached in front of the outer wall of the outdoor heat exchanger 8 by a distance of the space 24, it passes through the outdoor heat exchanger 8 that satisfies the performance of the outdoor unit 1. If there is a structure that can secure the air volume of the outside air 13, there is no functional problem.

Therefore, the space 24 between the front of the outer wall of the outdoor heat exchanger 8 and the active filter unit 20 in the housing 2 of the outdoor unit 1 will be described with reference to FIGS. 13 to 15. FIG. 13 is an explanatory diagram for explaining the calculation of the air volume area in the outdoor heat exchanger 8 of the existing outdoor unit 1. FIG. 14 is an explanatory diagram for explaining the calculation of the air volume area in the outdoor heat exchanger 8 of the outdoor unit 1 according to the first embodiment. FIG. 15 is an explanatory diagram for explaining the calculation of the air volume area in the outdoor heat exchanger 8 when the active filter unit 20 is installed in front of the outer wall of the outdoor heat exchanger 8 at an arbitrary dimension.

First, in terms of the performance of the outdoor unit 1 as an actual machine, it is grasped to what percentage the decrease in the air volume does not affect the performance of the decrease in the air volume of the outside air 13 passing through the outdoor heat exchanger 8. ..

The outdoor unit 1 shown in FIG. 13 is an existing outdoor unit 1 in which the active filter unit 20 (not shown here) is not arranged on the outer peripheral surface of the housing 2. In this existing outdoor unit 1, the outdoor heat exchanger front 81 through which the outside air 13 passes through the outdoor heat exchanger 8 arranged along the inner peripheral surface of the housing 2, the outdoor heat exchanger left side 82, and the outdoor heat exchanger The total area X of the four locations, the right side 83 and the back surface 84 of the outdoor heat exchanger, is obtained.

Further, as shown in FIG. 14, when the active filter unit 20 is directly attached in front of the outer wall of the outdoor heat exchanger front surface 81, that is, when the space 24 = 0, the active filter unit is relative to the outdoor heat exchanger front surface 81. 20 determines the shielding area Y that prevents the inflow of the outside air 13.

Based on these obtained total area X and shielding area Y, the reduction ratio Z of the air volume when the active filter unit 20 is directly attached in front of the outer wall of the outdoor heat exchanger front surface 81 is (total area X-shielding area Y) ÷. The total area is X. The decrease in the air volume of the outside air 13 passing through the outdoor heat exchanger 8 is grasped by the decrease ratio Z of the air volume.

In FIG. 15, the active filter unit 20 is spaced apart from the space 24 at a position facing the front side of the outdoor heat exchanger 8 on the outer peripheral surface of the upper portion of the housing 2 of the outdoor unit 1, that is, the front surface 81 of the outdoor heat exchanger. It shows the case where it is installed with an opening. In this case, a space 24 is formed between the active filter unit 20 and the position facing the outdoor heat exchanger front surface 81 as compared with the case where the active filter unit 20 is directly attached in front of the outer wall of the outdoor heat exchanger front surface 81. As a result, the shielding area Y that prevents the active filter unit 20 from inflowing the outside air 13 is reduced. In other words, since the space 24 is formed between the active filter unit 20 and the position facing the front surface 81 of the outdoor heat exchanger, the outside air 13 can flow in from the vertical and horizontal directions of the space 24. Therefore, the area of the front surface 81 of the outdoor heat exchanger through which the outside air 13 passes through the outdoor heat exchanger 8 increases without being hindered by the active filter unit 20. Then, the passable area W of the outside air 13 passing through the front surface 81 of the outdoor heat exchanger in this case is obtained.

The outdoor heat 13 flows in from the vertical and horizontal directions of the open space 24 formed between the front of the outer wall of the outdoor heat exchanger front 81 and the active filter unit 20, and the outdoor heat 13 passes through the outdoor heat exchanger 8. The area of the exchange front surface 81 is increased. As a result, the air volume of the outside air 13 passing through the outdoor heat exchanger 8 also increases. Therefore, when the active filter units 20 are arranged in front of the outer wall of the outdoor heat exchanger front surface 81 of the housing 2 at intervals of the space 24, the shielding area Ya is such that the shielding area Y of the active filter unit 20-outside air 13 passes through. The increased area Q is obtained.

Therefore, the reduction ratio Za of the air volume when the active filter units 20 are arranged at intervals of the space 24 is (total area X-shielding area Ya) ÷ total area X. Based on this calculation, the decrease in the air volume of the outside air 13 passing through the outdoor heat exchanger 8 is grasped, and the distance of the space 24 formed in front of the outer wall of the outdoor heat exchanger front surface 81 is determined.

Next, as an example of the outdoor unit 1 in the case where the performance of the outdoor heat exchanger 8 is satisfied even if the air volume of the outside air 13 passing through the outdoor heat exchanger 8 is reduced by 5%, the distance setting of the space 24 is shown in FIG. It will be described with reference to FIG.

When the space 24 between the active filter unit 20 and the front of the outer wall of the outdoor heat exchanger front surface 81 in the housing 2 is 0 mm, the outdoor heat exchanger front 81 through which the outside air 13 passes through the outdoor heat exchanger 8 and the outdoor heat exchange The total area X of the four outdoor heat exchangers 8: the left side 82 of the vessel, the right side 83 of the outdoor heat exchanger, and the back 84 of the outdoor heat exchanger is 1.67 m ² . Further, when the shielding area Y of the active filter unit 20 in this case is 0.24 m ² , the reduction ratio Za of the air volume of the outside air 13 passing through the outdoor heat exchanger 8 is (1.67-02.24) ÷ 1.67. = About 0.86, which is about 14% down.

The active filter unit 20, when the front outer wall of the outdoor heat exchanger front 81 of the housing 2, the space 24 is 100 mm, air volume area 0.06 m ² from the left and right entering from the space 24, 0.10 m ² from above and below Total 0.16m ² increase. Therefore, the reduction ratio Za of the air volume of the outside air 13 passing through the outdoor heat exchanger 8 can be suppressed to (1.67-0.24 + 0.16) /1.67 = 0.95, which is a 5% reduction. From this result, it was found that the space 24 in front of the outer wall of the active filter unit 20 and the front surface 81 of the outdoor heat exchanger is preferably about 100 mm. Needless to say, the desired formal distance of the space 24 is determined after comparative examination with the actual machine. For example, during heating operation, the surface of the outdoor heat exchanger 8 may frost and ice may grow. Therefore, the space 24 is a fin due to frost on the heat exchanger and foreign matter adhering to the surface of the outdoor heat exchanger 8. It is necessary to take into consideration the clogging of 12 and the like.

<Effect in Embodiment 1>
As described above, in the first embodiment, the active filter 14 that suppresses the harmonics generated by the control unit 6 that controls the

inverter devices

4a and 208a in the outdoor unit 1 provided in the air conditioner 200. An active filter unit 20 having a case 20a for accommodating the active filter 14, and a mounting portion 21 for attaching the active filter unit 20 are provided. Further, the active filter unit 20 is variably attached to the outer peripheral surface of the housing 2 of the outdoor unit 1 via the attachment portion 21 with the distance of the space 24 formed between the active filter unit 20 and the outer peripheral surface. This makes it unnecessary to install the active filter unit 20 inside the housing 2 of the outdoor unit 1. Therefore, in the outdoor unit 1 and the air conditioner 200 provided with the outdoor unit 1, the overcrowded state of the component arrangement inside the housing 2 can be eliminated by the amount of space for installing the active filter unit 20 inside the housing 2, and each component can be eliminated. It is possible to improve the cooling efficiency of the.

Moreover, since the active filter unit 20 is installed via the mounting portion 21, a space 24 can be formed with a desired dimension between the active filter unit 20 and the outer peripheral surface of the housing 2. Therefore, even if the active filter unit 20 is installed at a position facing the outdoor heat exchanger 8 arranged in the upper part of the housing 2, the inflow amount of the outside air 13 in the outdoor heat exchanger 8 is reduced to the extent that it affects the performance. I won't let you.

In this way, the active filter unit 20 can also be installed at a position facing the front of the outer wall of the outdoor heat exchanger 8 at the upper part of the housing 2. Therefore, in such an outdoor unit 1, maintenance of the active filter unit 20 is easy, and the inside of the outdoor unit 1 can be easily maintained without removing the active filter unit 20. Therefore, the outdoor unit 1 of the first embodiment and the air conditioner 200 provided with the outdoor unit 1 can not only improve the efficiency of the installation work but also have excellent maintainability.

Further, the active filter unit 20 is attached to the outer peripheral surface of the housing 2 via an attachment portion 21 having a pair of pillars 22 and a sidebar 23 arranged so as to be orthogonal to the pair of pillars, and the sidebar 23 is attached. The distance of the space 24 can be changed only by changing the dimension H of the sidebar plate 232 according to the desired distance of the space 24. In this way, since the distance of the space 24 can be easily adjusted, the choice of the position where the active filter unit 20 is attached can be increased.

Further, if the active filter unit 20 is made optional and the active filter unit 20 is attached to the outdoor unit 1 only when the active filter unit 20 is required for the air conditioner 200, the air conditioner 200 is inexpensive with a simple configuration. Can be provided to.

Further, since the active filter unit 20 is attached via the attachment portion 21 regardless of the size of the housing 2 of the outdoor unit 1, the parts of the attachment portion 21 can be shared and the active filter unit can be shared. The cost of mounting parts for installing 20 can be reduced.

Embodiment 2.
Next, the outdoor unit 1 according to the second embodiment will be described with reference to FIGS. 16 to 18. FIG. 16 is a front view showing the outdoor unit 1 according to the second embodiment. FIG. 17 is a front view showing the outdoor unit 1 according to the second embodiment. FIG. 18 is a front view showing the outdoor unit 1 according to the second embodiment.

In the second embodiment, the structure in which the active filter unit 20 can be attached will be described even if the size of the appearance of the housing 2 is different due to the capacity of the outdoor unit 1. As an example of the size difference in the appearance of the housing 2 in the outdoor unit 1, for example, the S size housing 2S shown in FIG. 16, the M size housing 2M shown in FIG. 17, and the L size housing shown in FIG. 18 Raise the body 2L. Here, the housing 2 is distinguished as a housing 2S, a housing 2M, and a housing 2L for each different size, and is active in the housing 2S, the housing 2M, and the housing 2L having different sizes. A case where the filter unit 20 is attached will be described. Although the appearance sizes of the housing 2S, the housing 2M, and the housing 2L are different, the other configurations are the same, and this is the same as the housing 2 described above. Therefore, in the following, the housing 2S, the housing 2M, and the housing 2L may be collectively referred to as the housing 2.

As shown in FIGS. 16 to 18, when the active filter unit 20 is installed on the front side of the upper outdoor heat exchanger 8 in the housings 2S, the housing 2M, and the housing 2L having different sizes, the mounting portion 21 At the positions of the screw holes 37 for fixing the pair of pillars 22, the L dimension in the height direction is the same for the housing 2S, the housing 2M, and the housing 2L. As a result, the pair of pillars 22 can be made into the same component and can be shared.

Further, in this case, the active filter unit 20 is attached to the front surface of the outdoor heat exchanger 8 of the housing 2S, the housing 2M, and the housing 2L having different sizes only by preparing the sidebars 23 having different lengths. Is possible. Further, when the space 24 of the small housing 2S having a small air volume area of the outdoor heat exchanger 8 is combined with the space 24 of the housing 2M of another size and the housing 2L, the sidebars having different lengths are used. Since all the parts other than the 23 can be shared, the cost of the parts of the mounting portion 21 can be significantly reduced. Further, the L1 dimensions of the lower portion of the housing 2S, the housing 2M, and the housing 2L in the height direction may be changed for each of the housing 2S, the housing 2M, and the housing 2L, respectively. , The same dimensions may be used.

Further, in order to fix the pair of pillars 22 at common positions on the front surface, the left side surface, the right side surface, and the back surface of the housing 2S, the housing 2M, and the housing 2L having different sizes, respectively. The screw hole 37 is formed. Then, by simply changing the length of the sidebar 23 according to the arrangement of the pair of pillars 22, the active filter unit can be applied to any of the four surfaces of the housing 2S, the housing 2M, and the housing 2L. 20 can be installed. As a result, even if the mounting position of the active filter unit 20 is changed depending on the installation status of the outdoor unit 1, it is limited to the front side facing the outdoor heat exchanger 8 on the outer peripheral surface of the upper part of the housing 2. Instead, it can be installed at an appropriate position as needed.

Embodiment 3.
Next, the outdoor unit 1 according to the third embodiment will be described with reference to FIGS. 19 to 22. FIG. 19 is a perspective view showing the appearance of the outdoor unit 1 according to the third embodiment. FIG. 20 is a side view showing the appearance of the outdoor unit 1 according to the third embodiment. FIG. 21 is a perspective view showing the appearance of the outdoor unit 1 according to the third embodiment. FIG. 22 is a side view showing the appearance of the outdoor unit 1 according to the third embodiment.

19 and 20 show the outdoor unit 1 of the housing 2S, and FIGS. 21 and 22 show the outdoor unit 1 of the housing 2M. Here, a case where the active filter unit 20 is attached to the right side surface of the housing 2S and the housing 2M will be described.

As shown in FIGS. 19 and 21, when the active filter unit 20 is attached to the right side surface of the housing 2S and the housing 2M, as shown in FIGS. 20 and 22, the housing 2S and the housing 2M At the position of the screw holes 37 for fixing the pair of pillars 22 on the right side surface of the above, the L dimension in the height direction is the same for both the housing 2S and the housing 2M. Then, the length of the sidebar 23 is changed according to the arrangement of the pair of pillars 22. For example, sidebars 23 having different lengths are prepared. As a result, even if the mounting position of the active filter unit 20 is changed depending on the installation status of the outdoor unit 1, it is limited to the front side facing the outdoor heat exchanger 8 on the outer peripheral surface of the upper part of the housing 2. Instead, the active filter unit 20 can be installed at a position as required, in this case, on the right side surface of each of the housing 2S and the housing 2M. Further, by making the pair of pillars 22 the same component, the pair of pillars 22 can be made common.

Further, as described above, at the positions of the screw holes 37 for fixing the pillars 22 on the left side surface and the back side of the housing 2S and the housing 2M, the L dimension in the height direction is set to the housing 2S and the housing 2S. If the housing 2M has the same dimensions, the active filter unit 20 can be attached to any of the four surfaces of the front surface, the left and right side surfaces, and the back surface of the housing 2 while making the pair of pillars 22 the same parts. The L1 dimension may be changed for each model or may be the same dimension.

Embodiment 4.
Next, the outdoor unit 1 according to the fourth embodiment will be described with reference to FIGS. 23 and 24. FIG. 23 is a perspective view showing the appearance of the outdoor unit 1 according to the fourth embodiment. FIG. 24 is a rear perspective view showing the appearance of the outdoor unit 1 according to the fourth embodiment.

The surface of the outdoor unit 1 that requires services such as maintenance for the machine room 3 (see FIG. 2) is only the front surface of the housing 2, and the left and right sides and the back surface are on the front side of the outdoor heat exchanger 8. The case where it is not always necessary to attach the active filter unit 20 will be described. Here, a case where the active filter unit 20 is attached to the left and right side surfaces of the housing 2 of the outdoor unit 1 and the lower part of the three surfaces including the back surface will be described.

As shown in FIGS. 23 and 24, when the active filter unit 20 is attached to the lower part of the right side surface of the housing 2, when the active filter unit 20 is attached to the right side surface of the housing 2, a pair on the right side side of the housing 2. At the position of the screw hole 37 for fixing the pillar 22, the L2 dimension in the height direction is the same as the L dimension in the height direction, that is, L2 = L. Then, the length of the sidebar 23 is changed according to the arrangement of the pair of pillars 22. As a result, the active filter unit 20 can be attached to the lower part of the right side surface of the housing 2 without changing the pair of pillars 22.

Further, similarly to the right side surface of the housing 2, the left side surface and the back surface also have the L2 dimension in the height direction as the L dimension in the height direction at the positions of the screw holes 37 for fixing the pair of pillars 22. The same dimensions, that is, L2 = L. As a result, the active filter unit 20 can be attached to the left side surface and the lower part of the back surface.

Similar to the third embodiment, the height of the positions of the screw holes 37 for fixing the pair of pillars 22 for attaching the active filter units 20 on the left and right side surfaces of the housing 2 of each outdoor unit 1 and the three rear surfaces. By setting L2 = L, which has the same dimension as L, for the L2 dimension in the vertical direction, the pair of pillars 22 can be made into the same component. Similarly, the active filter unit 20 can be attached to the left and right side surfaces of the housing 2 of each outdoor unit 1 and the lower parts of the three rear surfaces by simply providing parts having different lengths of the sidebar 23. Further, since the height dimension of the position of the screw holes 37 for fixing the pair of pillars 22 is L2 = L, the active filter unit 20 is attached to the front surface of the outdoor heat exchanger 8 as well as the lower portion. Is also possible. The L1 dimension may be changed for each outdoor unit 1 as in the third embodiment, or may be the same dimension.

Embodiment 5.
Next, the outdoor unit 1 according to the fifth embodiment will be described with reference to FIGS. 25 to 30. FIG. 25 is an exploded perspective view showing the appearance of the outdoor unit 1 according to the fifth embodiment. FIG. 26 is a perspective view showing the appearance of the outdoor unit 1 according to the fifth embodiment. FIG. 27 is an exploded perspective view showing the appearance of the outdoor unit 1 according to the fifth embodiment. FIG. 28 is an exploded perspective view showing the appearance of the outdoor unit 1 according to the fifth embodiment. FIG. 29 is an enlarged perspective view showing the pillar 22 in the mounting portion 21 of FIG. 28. FIG. 30 is an exploded perspective view showing the appearance of the outdoor unit 1 according to the fifth embodiment.

When the outdoor unit 1 is installed in a cold region, it is shown in FIGS. 25 and 26 in order to prevent the performance of the outdoor unit from deteriorating due to snow accumulating on the outdoor heat exchanger 8 and blocking the outdoor heat exchanger 8 with snow. In addition, the snow hood 38 may be attached to the four surfaces of the housing 2. For example, the snow hood 38 is composed of

snow hood panels

38F, 38R, 38B and 38L, and the

snow hoods

38F, 38R, 38B and 38L are attached to the four surfaces of the front surface, the right side surface, the back surface and the left side surface of the housing 2, respectively. By being able to do so, it prevents snow from accumulating. The snow-proof hood 38 is attached by using pre-formed screw holes 43 for attaching the snow-proof hood on each surface of the housing 2.

In FIGS. 27, 28 and 30, for convenience of explanation, only the snow hood panel 38F among the

snow hood panels

38F, 38R, 38B and 38L constituting the snow hood 38 will be illustrated and described, but other snow hood panels will be described. The

hood panels

38R, 38B and 38L are similarly configured.

As shown in FIG. 27, the snow hood panel 38F constituting the snow hood 38 is composed of a left cover 381, a right cover 382, an upper cover 383, and a lower cover 384. In such a snow-proof hood panel 38F, first, the screw 44 is fixed to the screw hole 43 for attaching the snow-proof hood provided on the front surface of the housing 2 via the left cover 381, thereby housing the left cover 381. Fix it to body 2. Similarly, the right cover 382 is fixed to the housing 2 with the screw 44. Next, the lower cover 384 and the upper cover 383 are fixed to the housing 2 with screws 44. In this way, the snow hood 38 is attached to the outer peripheral surface of the housing 2.

Here, for example, on the outer peripheral surface of the housing 2, the snowproof hood 38 will be attached when the active filter unit 20 is attached to the front side of the outdoor heat exchanger 8 on the front side of the housing 2. As shown in FIG. 28, an active filter unit 20 and a snow hood 38 are installed on the outer peripheral surface of the housing 2. When the active filter unit 20 is installed in front of the outdoor heat exchanger 8 on the front side of the housing 2, the snow hood 38 is attached as a screw hole 37 for attaching a pair of pillars 22 for fixing the active filter unit 20. You may use the screw hole 43 for this purpose.

As shown in FIG. 29, each of the pair of pillars 22 is formed with screw holes 45 for attaching a snow-proof hood. The screw holes 43 for attaching the snow hood are shared with the screw holes 37 for fixing the pair of pillars 22 to the housing 2, and the screw holes 43 for attaching the snow hood are provided on each surface of the housing 2. It is provided at the same height dimension, for example, at the position of the L dimension or the L1 dimension shown in FIG. As a result, as the screw hole 37 for fixing the pillar 22 for assembling the active filter unit 20, the screw hole 43 for attaching the snow-proof hood provided in the housing 2 for attaching the snow-proof hood 38 can be used. Therefore, it is not necessary to form a dedicated screw hole in the housing 2 for attaching each of the pair of pillars 22 and the snow hood 38.

As shown in FIG. 30, the left cover 381 is fixed to one pillar 22 with a screw 46. Similarly, the right cover 382 is fixed to the other pillar 22. Next, the lower cover 384 and the upper cover 383 are fixed to the left cover 381 and the right cover 382 with screws 46, respectively. In this way, even when the active filter unit 20 is installed on the outer peripheral surface of the housing 2, the snow hood 38 can be easily attached to the outer peripheral surface of the housing 2.

1 outdoor unit, 2 housing, 2L housing, 2M housing, 2S housing, 3 machine room, 4 compressor, 4a inverter device, 5 outdoor blower, 6 control unit, 7 electrical component unit, 8 outdoor heat exchanger 10, refrigerant, 11 pipes, 12 fins, 13 outside air, 14 active filters, 15 active filter boards, 16 active filter cooling fans, 17 filter cases, 18 intake ports, 19 exhaust ports, 20 active filter units, 20A base, 20B Cover, 20a case, 21 mounting part, 22 pillars, 23 sidebar, 24 space, 29 exhaust duct, 30 cable, 31 cover suction hole, 32 base exhaust hole, 33 cooling air, 35 ventilation hole, 36 screw, 37 Screw hole, 38 snow hood, 38B snow hood panel, 38F snow hood panel, 38R snow hood panel, 43 screw hole, 44 screw, 45 screw hole, 46 screw, 81 outdoor heat exchanger front, 82 outdoor heat exchanger left side, 83 outdoor heat exchanger right side, 84 outdoor heat exchanger back, 151 harmonic suppression control circuit, 152 power module, 153 harmonic suppression drive circuit, 154 ripple filter circuit, 155 noise filter circuit, 156 condenser, 157 reactor, 200 air Harmonizer, 201 indoor unit, 202 flow path switching device, 203 refrigerant pipe, 203a refrigerant pipe, 203b refrigerant pipe, 204 refrigerant circuit, 205 expansion valve, 206 indoor heat exchanger, 207 indoor blower, 208 fan motor, 208a inverter device , 209 fan motor, 231 main body, 232 sidebar plate, 281 shield plate, 381 left cover, 382 right cover, 383 top cover, 384 bottom cover, H dimension, Q area, W passable area, X total area, Y Shielding area, Ya Shielding area, Z reduction ratio, Za reduction ratio.

Claims

The housing that makes up the outer shell and
A compressor installed at the bottom of the housing to compress the refrigerant,
An outdoor heat exchanger installed along the inner peripheral surface of the upper part of the housing,
An outdoor blower installed on the upper part of the housing and supplying air to the outdoor heat exchanger.
An outdoor unit that is attached to the housing and has a control unit that controls the compressor and the outdoor blower.
An active filter that suppresses harmonics generated from the control unit,
A case that houses the active filter and
With an active filter unit,
A mounting portion for mounting the active filter unit is provided.
The active filter unit is
An outdoor unit in which the distance between the outer peripheral surface and the outer peripheral surface of the housing can be variably attached to the outer peripheral surface of the housing via the attachment portion.
The outdoor unit according to claim 1, wherein the mounting position of the active filter unit is a position facing the front side of the outdoor heat exchanger on the outer peripheral surface of the upper part of the housing.
The outdoor unit according to claim 1, wherein the mounting position of the active filter unit is the outer peripheral surface of the lower part of the housing.
The housing has a rectangular parallelepiped shape, and the four sides constituting the side surface are open.
The outdoor heat exchanger is
It is installed along the inner peripheral surfaces of the four open surfaces at the top of the housing.
The active filter unit is
The outdoor unit according to claim 1, which can be attached to any of the four surfaces facing the front side of the outdoor heat exchanger on the outer peripheral surface of the upper part of the housing.
The mounting part is
A pair of pillars attached to the outer peripheral surface of the housing and
A sidebar arranged so as to be orthogonal to the pair of pillars and connecting the active filter unit and the pair of pillars is provided.
Any one of claims 1 to 4, wherein the sidebar has a pair of legs arranged at both ends in the longitudinal direction, and the dimensions of the space can be changed by adjusting the length of each leg. The outdoor unit described in the section.
The outdoor unit according to claim 5, wherein the mounting positions of the pair of pillars in the housing are the same in the height direction of the housing regardless of the external size of the housing.
The pair of pillars
The outdoor unit according to claim 5 or 6, wherein a mounting hole for mounting a snow-proof hood for preventing snow accumulation in the outdoor heat exchanger is formed.
The outdoor unit according to any one of claims 1 to 7.
With an indoor unit having an indoor heat exchanger,
An air conditioner in which the indoor heat exchanger and the outdoor heat exchanger are connected by piping to form a refrigerant circuit.