KR100948776B1 - Outdoor unit for air conditioner - Google Patents

Abstract

Provided is an outdoor unit that can suppress the pressure loss due to the presence of a fan guard to improve the performance of the air conditioner. The outdoor unit of the air conditioner includes an outdoor fan, an air blower outlet, and a fan guard 30. The fan guard 30 covers the air outlet and has a long section 31 separated from the outdoor fan by 100 mm or more. Moreover, the long part 31 is provided with the 1st opening OP1 whose minimum width is 15 mm or more.

Air Conditioning Units, Outdoor Units, Fan Guard, Air Vents, Openings

Description

Outdoor unit of air conditioner {OUTDOOR UNIT FOR AIR CONDITIONER}

The present invention relates to an outdoor unit of an air conditioner, particularly an outdoor unit of an air conditioner of a type that blows air from a ceiling surface.

In an outdoor unit of an air conditioner of the type that blows air from a conventional ceiling surface, an air outlet is formed on the top surface of the casing, and a fan guard (also called a fan grill) is disposed to cover the air outlet. (For example, refer patent document 1).

[Patent Document 1] Japanese Patent Laid-Open No. 2004-156828

In the outdoor unit of such an air conditioner, it is required to raise performance, maintaining compactness. And also for the fan for blowing air, it is calculated | required to raise the air volume, maintaining the magnitude | size equivalent to the past.

However, in the related art, a fan guard mounted so as to cover the air blower outlet where the vane of the fan is arranged becomes a resistance at the time of air blowout, and a pressure loss occurs. It is not conceivable to omit the fan guard for the purpose of eliminating this pressure loss, but if the pressure loss can be suppressed as little as possible, the amount of air can be increased.

An object of the present invention is to provide an outdoor unit which can suppress the pressure loss due to the presence of a fan guard and improve the performance of the air conditioner.

The outdoor unit of the air conditioner which concerns on 1st invention is equipped with the fan, the air blower outlet, and the fan guard. The air outlet is an opening for letting out the air blown out from the fan. The fan guard covers the air outlet and has a long section separated from the fan by a distance longer than the length of the test finger. Moreover, the long opening part is provided with the 1st opening which a test finger can insert.

Conventionally, in the outdoor unit of the air conditioner, the resin fan guard is provided with many slits for letting air through, but the maximum width of the slits is such that the test finger does not enter, that is, a width of less than 12 mm. Limited to

On the other hand, in the outdoor unit which concerns on 1st invention, in a fan guard, the long hand part is provided in the position which is farther from the pan than the length of a test finger, and if it is a long hand part, even if a finger is inserted, a fingertip rotates Since the first opening in the long intestinal tract is not in contact with the fan being made, it is assumed that the test finger can be inserted as large (wide). Since such a large first opening is formed in the long span of the fan guard, the air blown out of the air outlet port exits the outside of the outdoor unit without being subjected to great resistance by the fan guard. The state in which the pressure loss is suppressed to be small can be realized. As a result, in the outdoor unit according to the first aspect of the invention, the air volume can be increased or the static pressure can be increased by the fan, thereby improving the performance of the air conditioner.

The outdoor unit of the air conditioner according to the second invention is the outdoor unit of the first invention, the long ear section is 80 mm or more away from the fan, and the minimum width of the first opening of the long head section is 12 mm or more.

The outdoor unit of the air conditioner according to the third invention is the outdoor unit of the second invention, the long ear section is 100 mm or more away from the fan, and the minimum width of the first opening of the long head section is 15 mm or more.

The outdoor unit of the air conditioner according to the fourth invention is any one of the first to third outdoor units, and the fan guard further has a fan vicinity, and the distance from the fan to the vicinity of the fan is from the fan to the chief. Closer than A second opening is formed in the vicinity of the fan, and a test finger cannot be inserted into the second opening.

In this case, if the opening is provided only in the long separation part sufficiently separated from the fan, and the opening is not provided for the part close to the fan, the amount of reduction in pressure loss may not be sufficiently secured. Also in the vicinity, the second opening is small so that the test finger cannot enter. As a result, the pressure loss can be further reduced.

The outdoor unit of the air conditioner according to the fifth invention is the outdoor unit of the fourth invention, and the maximum width of the second opening is smaller than 12 mm.

The outdoor unit of the air conditioner according to the sixth invention is the outdoor unit of the fourth invention, and the long door portion faces the air outlet. The fan vicinity extends from the periphery of the long section to the periphery of the air outlet.

Here, in the part near the fan among the parts which prevents contact with a fan between the long part and the peripheral part of an air outlet, while fully separating the long part which opposes an air outlet, 2nd Pressure loss is reduced while ensuring safety at the opening.

In addition, in the present invention, since the outdoor unit is unnecessarily large when the long section is separated from the fan by a long distance, the distance between the long section and the fan should be 500 mm or less, preferably 300 mm or less. Further, if the minimum width of the first opening of the long tooth section is too large, a hand enters the fan side from the first opening. Therefore, in order to prevent this, the minimum width of the first opening should be 60 mm or less, preferably 50 mm or less. In addition, with respect to the second opening in which the maximum width is set smaller than 12 mm so that the finger does not enter, if the maximum width is too small, the air resistance by the vicinity of the fan increases, so the maximum width is 3 mm or more, preferably 5 mm. It should be above.

Effect of the Invention

According to the present invention, it is possible to suppress the pressure loss due to the presence of the fan guard while ensuring the function of the safety of the fan guard to prevent contact with the fan. Can be improved.

1 is a refrigerant circuit diagram of an air conditioner including an outdoor unit according to an embodiment of the present invention.

2A is a plan schematic diagram of an outdoor unit of 5 horsepower, (B) is a plan schematic diagram of an outdoor unit of 8, 10, and 12 horsepower, and (c) is a plan schematic diagram of an outdoor unit of 14, 16, and 18 horsepower.

3 is an external view of an outdoor unit having outdoor fans arranged two side by side.

4 is a perspective view of an outdoor unit excluding a casing or the like.

5 is an internal top view of the outdoor unit.

6 is a plan view of the fan guard.

7 is a side view of the fan guard.

8 illustrates optimization of an outdoor fan.

9 shows optimization of an outdoor fan.

10 is a schematic view of a control substrate.

11 is a schematic view of a display unit;

12 shows a test finger.

13 is a sectional view of a motor support according to a modification.

14 is a diagram showing a mounting structure of a closing valve according to a modification.

<Explanation of symbols for the main parts of the drawings>

1: air conditioner 2: outdoor unit

29: outdoor fan 30: fan guard

31: chapter chief 32a: near the fan

100: test finger OP1: first opening

OP2: second opening

<Configuration of Air Conditioning Device>

1 shows a refrigerant circuit of an air conditioner including an outdoor unit according to an embodiment of the present invention. The air conditioner 1 is a multi-type air conditioner for buildings, and has a structure in which a plurality of indoor units 3 are connected in parallel to one or a plurality of outdoor units 2. The refrigerant circuit 10 of the air conditioner 1 mainly includes the compressor 11, the four-way switching valve 12, the outdoor heat exchanger 13, the outdoor expansion valve 14, the indoor expansion valve 15, and the indoor heat exchanger. (16) is connected in order, and it becomes a vapor compression refrigeration cycle.

The compressor 11, the four-way switching valve 12, the outdoor heat exchanger 13 and the outdoor expansion valve 14 are included in the outdoor unit 2, and the indoor expansion valve 15 and the indoor heat exchanger 16 are It is included in the indoor unit 3. In addition, between the four-way switching valve 12 and the indoor heat exchanger 16 is connected by the gas-side refrigerant communication pipe 17a, and the liquid-side refrigerant communication between the outdoor expansion valve 14 and the indoor expansion valve 15. It is connected by the pipe 17b. The refrigerant communication pipes 17a and 17b are disposed between the outdoor unit 2 and the indoor unit 3. In addition, although the accumulator and other accessory equipment are provided in the outdoor unit 2, illustration is abbreviate | omitted here.

The gas side closing valve 18 and the liquid side closing valve 19 are provided in the distal end of the internal refrigerant circuit of the outdoor unit 2. The gas side closing valve 18 is arrange | positioned at the four-side switching valve 12 side, and the liquid side closing valve 19 is arrange | positioned at the outdoor expansion valve 14 side. The gas side refrigerant communication pipe 17a is connected to the gas side closing valve 18, and the liquid side refrigerant communication pipe 17b is connected to the liquid side closing valve 19. These closing valves 18 and 19 are in a closed state when the outdoor unit 2 or the indoor unit 3 is provided. And the closing valves 18 and 19 install each unit 2 and 3 locally, and connect the gas side refrigerant communication piping 17a and the liquid side refrigerant communication piping 17b to the closing valves 18 and 19. It becomes an open state.

The refrigerant circuit of the air conditioner 1 shown in FIG. 1 simplifies an actual circuit. For example, the actual compressor 11 is a variable capacity compressor (hereinafter referred to as an inverter compressor) that performs rotational speed control by an inverter and a constant capacity compressor (hereinafter, referred to as an inverter compressor) which performs on / off control. Are often used in combination. As the outdoor unit 2, the thing of the 5 horsepower HP shown in FIG. 2 (a), the thing of 8, 10, 12 horsepower shown in FIG. 2 (b), FIG. Although 14, 16, and 18 horsepower shown in 2 (c) are prepared, one inverter compressor is built in FIG. 2 (a), and one inverter compressor and fixed capacity in FIG. 2 (b). One compressor is built in, and in FIG. 2 (c), one inverter compressor and two constant capacity compressors are built in. In the outdoor unit 2 of this air conditioner 1, the electric wire of the inverter compressor and the electric wire of the constant capacity compressor are tied by the tie wrap which binds at the intersection part. By doing in this way, the noise which leaks around is reduced here.

In addition, the outdoor unit 2 is provided with an outdoor fan 29 for bringing air into the outdoor heat exchanger 13 to promote heat exchange between the refrigerant and the air (see FIG. 2). As the outdoor fan 29, in the outdoor unit 2 shown in Fig. 2A, one having a diameter of 680 mm having four blades is used in place of the conventional 700 mm diameter having three blades (Fig. 8). In the outdoor unit 2 shown in Fig. 2 (c), instead of the one having three blades of 700 mm in diameter, two ones having three blades having a diameter of 540 mm are arranged side by side (Fig. 9). Reference). In these outdoor fans 29, the fan is optimized for each casing, and the wing area is increased by about 20 to 25% compared with the conventional one, and the wing pitch is made an uneven pitch to reduce the NZ sound (aerodynamic noise). The noise level is reduced by about 1 decibel.

<Movement of air conditioner>

Next, the operation | movement operation of this air conditioning apparatus is demonstrated.

First, at the time of cooling operation, the four-way switching valve 12 is held in a state shown by a solid line in FIG. 1. The high-temperature, high-pressure gas refrigerant discharged from the compressor 11 flows into the outdoor heat exchanger 13 through the four-way switching valve 12, and heat-exchanges with the outdoor air to condense and liquefy. The liquefied refrigerant passes through the outdoor expansion valve 14 in the fully open state and flows into each indoor unit 3 through the liquid-side refrigerant communication pipe 17b. In the indoor unit 3, the refrigerant is depressurized to a predetermined low pressure in the indoor expansion valve 15, and further heat exchanges with the indoor air in the indoor heat exchanger 16 to evaporate. The indoor air cooled by evaporation of the refrigerant is blown into the room by an indoor fan (not shown) to cool the room. In addition, the refrigerant evaporated and vaporized in the indoor heat exchanger 16 is returned to the outdoor unit 2 through the gas side refrigerant communication pipe 17a and sucked into the compressor 11.

On the other hand, at the time of heating operation, it is hold | maintained in the state shown by the broken line in FIG. The high-temperature, high-pressure gas refrigerant discharged from the compressor 11 flows into the indoor heat exchanger 16 of each indoor unit 3 through the four-way switching valve 12, and heat-exchanges with the indoor air to condense and liquefy. The indoor air heated by the condensation of the refrigerant is blown into the room by an indoor fan to heat the room. The refrigerant liquefied in the indoor heat exchanger (16) is returned to the outdoor unit (2) via the liquid-side refrigerant communication pipe (17b) from the indoor expansion valve (15) in the fully open state. The refrigerant returned to the outdoor unit 2 is decompressed to a predetermined low pressure in the outdoor expansion valve 14, and further heat exchanges with the outdoor air in the outdoor heat exchanger 13 to evaporate. The refrigerant evaporated and vaporized by the outdoor heat exchanger 13 is sucked into the compressor 11 through the four-way switching valve 12.

In addition, in either of the cooling operation and the heating operation, the indoor expansion valve 15 of the indoor unit 3 is stopped and the indoor heat exchanger 16 of the indoor unit 3 is closed. The refrigerant hardly flows.

<Configuration of Outdoor Unit>

Next, the outdoor unit 2 will be described in detail with reference to FIGS. 3 to 5. FIG. 3 is an external view of the outdoor unit 2 shown in FIG. 2C having the outdoor fans 29 arranged side by side. FIG. 4 is a perspective view of the outdoor unit 2 in which the casing or outdoor fan 29 is removed, and is not shown in FIG. 2 (c) in view of ease of understanding, and is shown in FIG. 2 (b). It is shown to do. FIG. 5 is a plan view when the downward direction is seen from the center part of the height direction of the outdoor unit 2. FIG. In FIG. 3, illustration of the closing valves 18 and 19 is abbreviate | omitted. In addition, illustration is abbreviate | omitted also in the refrigerant | coolant piping inside.

(Casing, etc.)

The side plate 22 and the back plate 23 of the casing are integrally molded together with the struts 51, 52, 53, and 54. The front plate 21 of the casing is mounted on the outside of the struts 52 and 53. In addition, the four posts 51 to 54 extending vertically are connected to each other by the bottom frame 61 near the bottom, the horizontal stay 62 and the motor support 63 at the top. The motor support 63 is provided with the motor 70 which drives the outdoor fan 29 which has an impeller shown to FIG. 2 (b). The top plate 24 shown by the dashed-dotted line in FIG. 7 forms the air outlet of the outdoor unit 2 with the bell mouse 29a (top plate 24 arrange | positioned around the vane of the outdoor fan 29). It is located just above the member), and the outer periphery is fixed to the strut 51, 52, 53, 54, the side plate 22, or the back plate 23. As shown in FIG. A hole corresponding to the bell mouth 29a is drilled in the top plate 24, and an inner circumferential end forming the hole is bent upward.

(Bottom frame and closing valve)

The bottom frame 61 supports the compressor 11, the outdoor heat exchanger 13, and the like, and also serves to fix the closing valves 18 and 19 through the mounting structure 64. In addition, the lower part of the closing valves 18 and 19 opens the bottom frame 61.

The gas side closing valve 18 and the liquid side closing valve 19 of the outdoor unit 2 are arranged adjacent to each other, as shown in FIG. 5. And the arrangement direction of the gas side closing valve 18 and the liquid side closing valve 19 is set to the angle of 45 degrees with respect to the front plate 21 of the casing, and also with respect to the side plate 22 generally. That is, while the gas side closing valve 18 and the liquid side closing valve 19 are arrange | positioned apart, they are offset in the left-right direction (direction along the front plate 21), and also the front-back direction (side plate ( In the direction of 22). This makes it easy to take the pipes forward and backward, left and right, and also facilitates lagging of the refrigerant communication pipes 17a and 17b, such as winding both pipes with insulating tape or covering them with a decorative metal plate. , The thickness can be thinned, and it looks good.

(Structure below the closing valve)

In addition, the piping connection port of the gas side closing valve 18 also faces the piping connection port of the liquid side closing valve 19 similarly. In the figure, the structures of the closing valves 18 and 19 are simplified, but the closing valves 18 and 19 are connected to the refrigerant communication pipes 17a and 17b by a flare nut or a flange as in the related art. It does not have a structure of joining with a metal, but has a structure in which soldering (coupling a metal and a metal by heat using lead) is possible. Thereby, in the joining operation | work of the shut-off valves 18 and 19 and refrigerant | coolant communication piping 17a, 17b in the field | area, screwing operation | work is eliminated and workability improves, and the possibility of refrigerant leakage is also reduced.

(The structure of the fan guard)

The fan guard 30 consists of the grille which the three-dimensional unity of the mild steel wire was woven together, and the resin coating is given to all the surfaces. The strength is higher than that of the conventional resin grill, and the load resistance is 60 kgf. Moreover, as follows, the extraction area (opening ratio) is larger than that of the conventional resin grill.

In more detail, the fan guard 30 consists of steel wire of diameter 2.0mm and steel wire of diameter 3.5mm, and the intersection part is welded. The fan guard 30 surrounds a rectangular long section 31 separated by about 110 mm in the height direction from the outdoor fan 29, and a gap in the height direction of the long section 31 and the top plate 24. The side part 32 is comprised. Dimension H1 of FIG. 7 is 110 mm. The part extending sideways obliquely downward from the quadrilateral of the long stem part 31 in the side part 32 is a fan vicinity part 32a relatively close to the outdoor fan 29. As shown in FIG. Moreover, the connection part 32b is formed between four fan vicinity parts 32a of the side part 32. As shown in FIG. Furthermore, the four members 34 whose lower end part contacts the top plate 24 through the long part 31 through the connection part 32b are welded to the long part 31 or the connection part 32b. Lower ends 34a of these four members 34 are screwed to the top plate 24. Moreover, in order to prevent the position of the pan part 32a of the side part 32 from misaligning, the steel wire 33 which is also a member which comprises the long part 31 and the pan part 32a is the top plate 24 It extends downward like FIG. 7 so that it may enter into the hole (not shown) of ().

Many long openings 31 are formed with lattice-shaped steel wires. The width | variety of the narrow side of these 1st opening OP1 is 20 mm or more. Specifically, since the pitch P1 of the steel wire forming the first opening OP1 is 22 mm and the steel wire diameter is 2 mm, the width of the first opening OP1 is 20 mm. Although the size of this 1st opening OP1 is set to the size which the test finger 100 shown in FIG. 12 can be inserted, it is not the size which a human hand enters, and the long stem part 31 is made from the outdoor fan 29. Since it is 100 mm or more apart, a human finger tip does not contact the rotating outdoor fan 29.

On the other hand, in the vicinity of the fan 32a of the side part 32, considering that the distance to the outdoor fan 29 is less than 50 mm, the size of the second opening OP2 formed there is limited to small. Doing. Specifically, the narrower wire pitch P2 of the lattice steel wire is set to 11 mm, and the width of the second opening OP2 is reduced to about 9 mm. Thereby, the situation where the test finger 100 shown in FIG. 12 hits the outdoor fan 29 through the 2nd opening OP2 is avoided. That is, even if a person tries to insert a finger into the inside from the fan vicinity 32a of the side part 32, most fingers do not enter inside the fan guard 30, and the outdoor fan which a human finger rotates ( 29) do not touch it.

Although the connection part 32b of the side part 32 is separated from the outdoor fan 29 compared with the fan vicinity part 32a, the steel wire pitch is about the same as the fan vicinity part 32a.

In addition, as shown in FIG. 12, the test finger 100 mainly includes a disc-shaped stop plate 101, a first cylindrical portion 102 extending from the stop plate 101, and the like. And a second cylindrical portion 103 extending from the first cylindrical portion 102 and a similar finger tip 104 extending from the second cylindrical portion 103, the two joint portions being bent at a predetermined angle. It is meant to be built. The dimension of FIG. 12 is L1 = 80mm, L2 = 60mm, L3 = 20mm, L4 = 75mm, D = 12mm. In other words, the diameter D of the second cylindrical portion 103 is 12 mm.

As described above, in the fan guard 30, the long hand section 31 is provided at a position (about 110 mm away) from the outdoor fan 29 than the length (80 mm) of the test finger 100, and the long hand section ( 31), even if a human finger is inserted, the test finger 100 can insert the first opening OP1 of the long ear section 31, since the fingertip does not come into contact with the rotating outdoor fan 29. We do with big thing (thing with narrow width more than 20mm) of precision. Since such a large first opening OP1 is formed in the long separation portion 31 of the fan guard 30, the air blown out of the air outlet formed by the holes of the bell mouth 29a and the top plate 24 It exits outside of the outdoor unit 2, without receiving the large resistance by the fan guard 30, and is suppressed so that the pressure loss by presence of the fan guard 30 may be small.

In addition, in the fan guard 30, the opening part of the magnitude | size which a human finger does not enter so that ventilation is possible also with respect to the side surface part 32 which surrounds the clearance gap in the height direction of the long arm part 31 and the top plate 24 is carried out. The resistance to the flow of air blown out of the bell mouth 29a is formed as small as possible. Thereby, it is suppressed so that the pressure loss by presence of the fan guard 30 may be small.

As a result, in the air conditioner 1 employing the fan guard 30, the air volume can be increased or the static pressure can be increased by the outdoor fan 29, and the performance is greatly improved. Specifically, in the fan guard in which the pressure loss by the fan guard 30 does not enter a conventional human finger in every part, it uses the fan guard which covers the air blower outlet in the form which approaches an outdoor fan. Compared to the case, it is half or less.

<Buttons on the Control Board of the Outdoor Unit, High Brightness Display Displays, and Their Uses>

In FIG. 3, shown with the dotted line is the control board 42 inside the switch box 41 (refer FIG. 4) arrange | positioned behind the front plate 21. As shown in FIG. On this control board 42, as shown in FIG. 10, the some push button 43 is provided.

3, the front part 21 of the outdoor unit 2 is provided with the display part 45 which is a display which can display high brightness. This display part 45 is comprised from two upper and lower display panels which can represent three digit numbers (refer FIG. 11).

(Information display of refrigerant pressure and temperature)

In this air conditioner (1), when installing a pressure gauge as an option, instead of flare connecting a Bourdon tube pressure gauge to the gauge port of the refrigerant pipe as in the prior art, a soldering type pressure sensor and an electronic pressure gauge are used. It is a specification to attach. The pressure measured by the high precision electronic manometer is displayed on the display section 45 together with the temperature of the refrigerant.

(Refrigerant auto charge operation)

The air conditioner 1 has an automatic refrigerant charging operation function. Here, charging can be performed at an appropriate amount of refrigerant with a high precision of 500 grams. When the cylinder of the refrigerant is connected to the charging port and one of the push buttons 43 on the control board 42 is pressed, the automatic refrigerant charging operation is started, and the operation is automatically stopped when the proper amount is reached. In addition, when a cylinder is empty, the display which shows "empty" is performed on the display part 45. FIG.

As a result, in the air conditioner 1, local operations such as the calculation of the amount of manual refrigerant additional charge, the refrigerant additional charge, the bomb balance and the manual manual determination by the pressure gauge are made very simple.

(Automatic commissioning)

The air conditioner 1 is equipped with the automatic test run function performed after automatic refrigerant charge operation. When one of the push buttons 43 on the control board 42 is pressed after the automatic refrigerant charging operation, the piping connection error check of the refrigerant system is checked, and the opening of the gas side closing valve 18 or the liquid side closing valve 19 is checked. The sensor check and the refrigerant amount check are performed, and the trial run ends automatically.

(Refrigerant Leak Detection Operation)

The air conditioner 1 has a refrigerant leak detection operation function. This refrigerant leak detection is accurate to 500 grams, and the refrigerant leak detection operation is started by pressing one of the push buttons 43 on the control board 42. When the push button 43 is pressed, all the indoor units 3 automatically start the cooling operation, detect and stop the refrigerant leakage in about 30 minutes, and display or display 45 by the LED on the control board 42. An indicator display of is performed. For example, when leaking about 0.6 kilograms from the initial charge amount, the display section 45 displays "0.6".

(Self-diagnosis driving)

In the air conditioner 1, the self-diagnosis operation is started by pressing one of the push buttons 43 on the control board 42. This self-diagnosis operation contributes to speeding up the inspection work, and makes it possible to quickly perform a diagnosis of a failure. Specifically, the self-diagnosis operation causes the thermistor, the solenoid valve, the connector disconnection or failure of the electric expansion valve, the failure of the compressor, the abnormality in communication between the outdoor unit 2 and the indoor unit 3, and the like. I can guess.

In addition, this self-diagnosis operation can be performed after repair or inspection, and can be used for checking whether or not the maintenance work is appropriate. In this case, it is possible to prevent a sudden maintenance failure such as a mounting error of the thermistor.

In addition, the display of this self-diagnosis operation can also be made to perform a simple display using the display part 45. FIG.

<Variation example>

(A)

As shown in FIG. 13, it is preferable to employ | adopt the structure which makes small resistance to the flow of the air which flows from the bottom to the pair of motor support 63. FIG.

Here, as each motor support 63 between the horizontal stays 62 of FIG. 4, the channel material 63a whose cross section is a co-shape is used, and the lower surface on the channel material 63a faces downward. The member 63b for convex shape is welded. The motor support base 63 which consists of these channel material 63a and the member 63b is respectively shown in FIG. 13, and becomes a convex shape in which the center of a lower surface protrudes down compared with both ends as seen from a cross section. . As a result, the flow of air from the bottom to the top is as shown by arrow A1 in FIG. 13, whereby the resistance by the motor support 63 is reduced.

In addition, the lower surface shape of this motor support 63 is not limited to the cross-sectional shape of the inverted triangle shown in FIG. 13, and the member 63b may be an arc shape of the lower surface.

(B)

As shown in FIG. 14, it is preferable that the mounting structure 64 which extends upwards from the bottom frame 61 and supports the shutoff valves 18 and 19 is a door shape.

The mounting structure 64 is constituted by a pair of pillars 91 and 91 extending upward from the bottom frame 61 and horizontal beams 92 connecting the upper ends thereof. The pillars 91 and 91 and the horizontal beams 92 are formed with unevenness or drawing, and strength is secured, respectively. Then, the closing valves 18 and 19 are supported by the horizontal beams 92, and the opening OP3 is formed below the closing valves 18 and 19. As a result, when the soldering work is performed under the closing valves 18 and 19 to join the refrigerant communication pipes 17a and 17b, the work space can be secured. In addition, the refrigerant communication pipes 17a and 17b can also be pulled and turned in such a manner as to pass through the opening OP3.

In addition, as shown in FIG. 14, it is preferable to prepare two types of thing about the horizontal beam 92, and to be able to support the exclusive component 99 in the case of an air-conditioning free model.

(C)

In the outdoor unit 2 of the air conditioner 1, in the event of a failure, the operating data (high pressure, low pressure, various set values, subcooling, etc.) for 10 minutes before failure occurs is stored in the memory in the switch box 41. It is a good idea to make sure that it is remembered. In this way, data analysis can be performed in detail after a failure, the cause of the failure can be determined, and countermeasures can be taken and failure factors can be easily eliminated.

Claims (6)

Fan 29, An air blower outlet for blowing air blown out of the fan to the outside; A fan guard 30 covering the air outlet And The fan guard 30 has a long section 31 separated from the fan by a distance longer than the length of a test finger 100, The long tooth part 31 is provided with a first opening OP1 into which the test finger can be inserted. Outdoor unit of air conditioning unit (2). The method of claim 1, The long section 31 is 80 mm or more away from the fan, The minimum width of the first opening OP1 is 12 mm or more. Outdoor unit of air conditioning unit (2). The method of claim 2, The long section 31 is 100 mm or more away from the fan, The minimum width of the first opening OP1 is 15 mm or more. Outdoor unit of air conditioning unit (2). The method according to any one of claims 1 to 3, The fan guard 30 further has a fan vicinity 32a, The distance from the fan to the vicinity of the fan 32a is closer than the distance from the fan to the long limb 31, A second opening OP2 is formed in the vicinity of the fan 32a, and the test finger cannot be inserted into the second opening OP2. Outdoor unit of air conditioning unit (2). The method of claim 4, wherein The width of the second opening OP2 is smaller than 12 mm, Outdoor unit of air conditioning unit (2). The method of claim 4, wherein The long ear part 31 faces the air outlet, The fan vicinity 32a extends from the periphery of the long section to the periphery of the air outlet, Outdoor unit of air conditioning unit (2).

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