WO2007052560A1 - Outdoor unit for air conditioner - Google Patents

Abstract

An outdoor unit for an air conditioner, in which pressure loss by a fan guard is suppressed to a low level to improve performance of the air conditioner. The outdoor unit has an outdoor fan, an air blowout opening, and the fan guard (30). The fan guard (30) covers the air blowout opening and has a largely separated section (31) separated from the outdoor fan by 100 mm or more. Also, first openings (OP1) having a minimum width of 15 mm or more are formed in the largely separated section (31).

Description

 Specification

 Air conditioner outdoor unit

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to an outdoor unit of an air conditioner, and more particularly to an outdoor unit of an air conditioner of the type that blows air from the top surface.

 Background art

 In a conventional outdoor unit of an air conditioner that blows out air from the top surface, an air outlet is formed on the top surface of the casing, and a fan guard (also referred to as a fan grill) is provided to cover the air outlet. (Refer to, for example, Patent Document 1). Patent Document 1: JP 2004-156828

 Disclosure of the invention

 Problems to be solved by the invention

[0003] In the outdoor unit of such an air conditioner, it is required to improve performance while maintaining compactness. Also, the fan for blowing air is required to increase the air volume while maintaining the same size as before.

 Conventionally, however, the fan guard that is mounted so as to cover the air outlet where the fan impeller is disposed serves as a resistance when air is blown, resulting in pressure loss. Removing the fan guard to eliminate this pressure loss is a safety aspect. 1S If the pressure loss can be suppressed as small as possible, the air flow can be increased accordingly. An object of the present invention is to provide an outdoor unit that can suppress pressure loss due to the presence of a fan guard and improve the performance of an air conditioner.

 Means for solving the problem

[0004] The outdoor unit of the air conditioner according to the first invention includes a fan, an air outlet, and a fan guard. The air outlet is an opening through which the air blown by the fan is blown out. The fan guard covers the air outlet and has a long separation portion that is separated from the fan by the length of the test finger. In addition, a first opening into which the test finger can be inserted is formed in the long separation portion. Conventionally, in an outdoor unit of an air conditioner, many slits for passing air are formed in a resin fan guard, but the maximum width of these slits is such that a test finger cannot be inserted, that is, The width is limited to less than 12mm.

 In contrast, in the outdoor unit according to the first aspect of the invention, the fan guard is provided with a long separation portion at a position where the fan force is separated from the length of the test finger, and the fingertip rotates even if the finger is inserted if the long separation portion. The first opening at the long separation part is made large (wide) so that the test finger can be inserted. Since such a large first opening is formed in the long-spaced part of the fan guard, the air blown out from the air blow-out port can go out of the outdoor unit without receiving a large resistance by the fan guard. Therefore, it is possible to realize a state in which the pressure loss due to the presence of the fan guard can be suppressed to a small level. Thereby, in the outdoor unit according to the first invention, the air volume can be increased or the static pressure can be increased by the fan, and the performance of the air conditioner can be improved.

 [0005] The outdoor unit of the air conditioner according to the second aspect of the present invention is the outdoor unit of the first aspect, wherein the long separation portion has a fan force of 80 mm or more away, and the minimum width of the first opening of the long separation portion is 12 m. m or more.

 [0006] The outdoor unit of the air conditioner according to the third aspect of the present invention is the outdoor unit of the first or second aspect, wherein the long separation portion is separated from the fan by 100 mm or more, and the outermost unit of the first opening of the long separation portion. The narrow width is 15mm or more.

 [0007] The outdoor unit of the air conditioner according to the fourth aspect of the present invention is any one of the first to third outdoor units, wherein the fan guard has a fan vicinity portion whose distance from the fan is shorter than the long separation portion. It has further. A second opening through which the test finger cannot be inserted is formed in the vicinity of the fan.

Here, if an opening is provided only in the long separated part where the fan force is sufficiently separated and an opening is not provided in the part where the fan force is close, the amount of reduction in pressure loss may not be sufficiently secured. In view of this, a second opening (small in width) is provided in the vicinity of the fan so that the test finger cannot enter. This makes it possible to further reduce the pressure loss. [0008] An outdoor unit of an air conditioner according to a fifth aspect of the invention is the outdoor unit of the fourth aspect of the invention, wherein the maximum width of the second opening is smaller than 12 mm.

[0009] An outdoor unit of an air conditioner according to a sixth aspect of the invention is the outdoor unit of the fourth or fifth aspect, wherein the long separation portion faces the air outlet. The fan vicinity extends from the periphery of the long separation portion toward the periphery of the air outlet.

 Here, the fan that is close to the fan among the parts that prevent the contact with the fan between the long separation part and the peripheral part of the air blower outlet while sufficiently separating the long gap part facing the air blower outlet from the fan force. In the vicinity, the second opening reduces pressure loss while ensuring safety.

 In the present invention, since the outdoor unit becomes unnecessarily large if the long separation portion has a large fan force, the distance between the long separation portion and the fan should be 500 mm or less, preferably 300 mm or less. In addition, if the minimum width of the first opening of the long-separated portion is too large, the first opening robot will also get into the fan side.To prevent this, the minimum width of the first opening is 60 mm or less, preferably Should be less than 50mm. In addition, for the second opening that is set to a maximum width smaller than 12 mm so that fingers do not enter, if the maximum width is too small, the air resistance in the vicinity of the fan increases, so the maximum width is 3 mm or more, preferably Should be at least 5 mm.

 The invention's effect

 [0010] According to the present invention, it is possible to suppress the pressure loss due to the presence of the fan guard while ensuring the safety function of the fan guard to prevent contact with the fan. The performance of the apparatus can be improved.

 Brief Description of Drawings

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

 [Fig. 2] (a) A schematic plan view of a 5-horsepower outdoor unit. (B) A schematic plan view of an outdoor unit with 8, 10, 12 horsepower. (C) A schematic plan view of an outdoor unit of 14, 16, 18 horsepower.

 FIG. 3 is an external view of an outdoor unit having two outdoor fans.

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

FIG. 5 is an internal top view of the outdoor unit. [Figure 6] Plan view of the fan guard.

 [Fig. 7] Side view of the fan guard.

 FIG. 8 is a diagram showing optimization of outdoor fans.

 FIG. 9 is a diagram showing optimization of outdoor fans.

 FIG. 10 is a schematic diagram of a control board.

 FIG. 11 is a schematic view of a display unit.

 FIG. 12 shows a test finger.

 FIG. 13 is a cross-sectional view of a motor support base according to a modification.

 FIG. 14 is a view showing a structure for mounting a shut-off valve according to a modification.

Explanation of symbols

 1 Air conditioner

 2 Outdoor unit

 29 Outdoor fan

 30 Fan guard

 31 Long spacing 31

 32 Near fan

 100 test fingers

 OP1 1st opening

 OP2 2nd opening

BEST MODE FOR CARRYING OUT THE INVENTION

 <Configuration of air conditioner>

 FIG. 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 configuration 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 is mainly composed of a compressor 11, a four-way switching valve 12, an outdoor heat exchanger 13, an outdoor expansion valve 14, an indoor expansion valve 15, and an indoor heat exchanger 16 connected in this order. This is a vapor compression refrigeration cycle.

Compressor 11, four-way switching valve 12, outdoor heat exchanger 13 and outdoor expansion valve 14 are outdoor units The indoor expansion valve 15 and the indoor heat exchanger 16 are included in the indoor unit 3. The four-way selector valve 12 and the indoor heat exchange 16 are connected by a gas side refrigerant communication pipe 17a, and the outdoor expansion valve 14 and the indoor expansion valve 15 are connected by a liquid side refrigerant communication pipe 17b. The The refrigerant communication pipes 17a and 17b are arranged between the outdoor unit 2 and the indoor unit 3. In addition, the outdoor unit 2 is provided with an accumulator and other accessory devices. The illustration is omitted here.

 A gas side closing valve 18 and a liquid side closing valve 19 are provided at the end of the internal refrigerant circuit of the outdoor unit 2. The gas side closing valve 18 is arranged on the four-way switching valve 12 side, and the liquid side closing valve 19 is arranged on the outdoor expansion valve 14 side. A gas side refrigerant communication pipe 17a is connected to the gas side stop valve 18, and a liquid side refrigerant communication pipe 17b is connected to the liquid side stop valve 19. These closing valves 18 and 19 are closed when the outdoor unit 2 and the indoor unit 3 are installed. The closing valves 18 and 19 are opened after the units 2 and 3 are installed on the site and the gas side refrigerant communication pipe 17a and the liquid side refrigerant communication pipe 17b are connected to the closing valves 18 and 19, respectively.

 The refrigerant circuit of the air conditioner 1 shown in FIG. 1 is a simplified version of an actual circuit. For example, the actual compressor 11 includes a variable capacity compressor that controls the rotational speed by an inverter (hereinafter referred to as an inverter compressor) and a constant capacity compressor that is controlled on and off (hereinafter referred to as a constant capacity compression). Are often used in combination. In order to accommodate the size of the installed property, the outdoor unit 2 has 5 hp (HP) shown in Fig. 2 (a), 8, 10 and 12 hp shown in Fig. 2 (b), Fig. 2 ( As shown in Fig. 2 (a), an inverter compressor is built-in, and in Fig. 2 (b), an inverter compressor is installed. And one constant capacity compressor, and in the case of Fig. 2 (c), one inverter compressor and two constant capacity compressors are built in. In the outdoor unit 2 of the air conditioner 1, the electric wire of the inverter compressor and the electric wire of the constant capacity compressor are bundled by a lap at the intersection. By doing so, there is less noise leaking to the surroundings here.

In addition, the outdoor unit 2 is provided with an outdoor fan 29 that applies air to the outdoor heat exchanger 13 to promote heat exchange between the refrigerant and the air (see FIG. 2). As this outdoor fan 29 In the outdoor unit 2 shown in Fig. 2 (a), instead of the conventional 700 mm diameter with three blades, a 680 mm diameter with four blades is used (see Fig. 8), and Fig. 2 (c In the outdoor unit 2 shown in), instead of the 700mm diameter unit with three blades, a double unit with three blades and a diameter of 540mm is used (see Fig. 9). In these outdoor fans 29, the fan is optimized for each casing. By increasing the blade area by 20 to 25% compared to the conventional fan and making the blade pitch unequal, NZ Reduce the noise and reduce the noise level by about 1 dB.

 <Operation of air conditioner>

 Next, the operation of the air conditioner will be described.

 First, during the cooling operation, the four-way selector valve 12 is maintained in the state indicated by the solid line in FIG. The high-temperature and high-pressure gas refrigerant discharged from the compressor 11 flows into the outdoor heat exchanger 13 through the four-way switching valve 12, and exchanges heat with outdoor air to condense and liquefy. The liquefied refrigerant passes through the fully-expanded outdoor expansion valve 14 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 by the indoor expansion valve 15, and is further evaporated by exchanging heat with the indoor air through indoor heat exchange. The room air cooled by the evaporation of the refrigerant is blown out into the room by an indoor fan (not shown) to cool the room. The refrigerant evaporated and vaporized in the indoor heat exchanger 16 returns to the outdoor unit 2 through the gas side refrigerant communication pipe 17a and is sucked into the compressor 11.

 On the other hand, during the heating operation, the four-way selector valve 12 is held in the state indicated by the broken line in FIG. The high-temperature and 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, exchanges heat with the indoor air, and condenses. To do. The indoor air heated by the condensation of the refrigerant is blown out into the room by an indoor fan to heat the room. The refrigerant liquefied in the indoor heat exchanger 16 returns to the outdoor unit 2 from the fully opened indoor expansion valve 15 through the liquid side refrigerant communication pipe 17b. The refrigerant returned to the outdoor unit 2 is depressurized to a predetermined low pressure by the outdoor expansion valve 14 and further evaporated by exchanging heat with outdoor air in the outdoor heat exchanger 13. The refrigerant evaporated and evaporated in the outdoor heat exchanger 13 is sucked into the compressor 11 through the four-way switching valve 12.

In both cases of cooling operation and heating operation, The indoor expansion valve 15 of the unit 3 is closed, and the refrigerant hardly flows into the indoor heat exchanger 16 of the indoor unit 3.

 <Outdoor unit configuration>

 Next, the outdoor unit 2 will be described in detail with reference to FIGS. FIG. 3 is an external view of the outdoor unit 2 having the two outdoor fans 29 shown in FIG. 2 (c). Fig. 4 is a perspective view of the outdoor unit 2 with the casing and the outdoor fan 29 removed. In this case, for ease of understanding, Fig. 2 (b) is not shown in Fig. 2 (c). Is shown. FIG. 5 is a plan view of the outdoor unit 2 when viewed from the center in the height direction. In FIG. 3, the illustration of the closing valves 18 and 19 is omitted. Also, the illustration of the internal refrigerant piping etc. is omitted!

[0016] (casing, etc.)

 The side plate 22 and the back plate 23 of the casing are integrally formed with the columns 51, 52, 53, 54. The front plate 21 of the casing is attached to the outside of the columns 52 and 53. The four vertically extending columns 51 to 54 are connected to each other by a bottom frame 61 near the lower end, an upper lateral stay 62 and a motor support base 63. A motor 70 for driving the outdoor fan 29 having an impeller shown in FIG. 2 (b) is installed on the motor support base 63. The top plate 24 indicated by a two-dot chain line in FIG. 7 is directly above the bell mouth 29a (a member that forms the air outlet of the outdoor unit 2 together with the top plate 24) arranged around the impeller of the outdoor fan 29. The outer peripheral edge is fixed to the columns 51, 52, 53, 54, the side plate 22 and the back plate 23. The top plate 24 is formed with a circular hole corresponding to the bell mouth 29a, and the inner peripheral end forming the circular hole is bent upward.

[0017] (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 via the mounting structure 64. The bottom frame 61 is open at the lower part of the closing valves 18 and 19.

As shown in FIG. 5, the gas side closing valve 18 and the liquid side closing valve 19 of the outdoor unit 2 are arranged adjacent to each other. The direction in which the gas side shutoff valve 18 and the liquid side shutoff valve 19 are arranged is an angle of about 45 ° with respect to the front plate 21 and the side plate 22 of the casing. It has become. That is, the gas side shutoff valve 18 and the liquid side shutoff valve 19 are arranged apart from each other, offset in the left-right direction (direction along the front plate 21), and also in the front-rear direction (direction along the side plate 22). It is offset. This makes it easy to pull out the pipes in the front and rear, left and right, and also facilitates the work of racking the refrigerant communication pipes 17a and 17b (wrapping both pipes with heat insulating tape or covering them with a decorative metal plate). The thickness can be reduced and the appearance will be improved.

[0018] (Structure below the closing valve)

 Further, the pipe connection port 18a of the gas side shut-off valve 18 and the pipe connection port 19a of the liquid side shut-off valve 19 are also directed downward. In the figure, the force that simplifies the structure of the shutoff valves 18 and 19 The shutoff valves 18 and 19 are not connected to the refrigerant communication pipes 17a and 17b by flare nuts and flanges as in the past. However, it has a structure that can be brazed (metal and metal are joined by heat using brazing). This eliminates the screw tightening work in the joining work between the shut-off valves 18 and 19 and the refrigerant communication pipes 17a and 17b in the field, improving workability and reducing the risk of refrigerant leakage.

 (Fan guard structure)

 The fan guard 30 is a three-dimensional monolithic woven grill made of mild steel wire, and its surface is coated with grease. The strength is higher than that of the conventional greaves grill, and the load capacity is 60kgf. Further, as described below, the blowing area (opening ratio) is larger than that of the conventional grease grill.

More specifically, the fan guard 30 is composed of a steel wire having a diameter of 2. Omm and a steel wire having a diameter of 3.5 mm, and the intersection is welded. The fan guard 30 includes a rectangular long separation portion 31 that is approximately 110 mm away from the outdoor fan 29 in the height direction, and a side surface portion 32 that surrounds the clearance in the height direction between the long separation portion 31 and the top plate 24. It is configured. The dimension HI in Fig. 7 is 11 Omm. Of the side surface portion 32, a portion extending obliquely downward from the four sides of the long separation portion 31 is a fan vicinity portion 32 a that is relatively close to the outdoor fan 29. Further, a connecting portion 32b is formed between the four fan vicinity portions 32a of the side surface portion 32. Further, the four members 34 whose lower end portions contact the top plate 24 through the connecting portion 32b from the long separating portion 31 are welded to the long separating portion 31 and the connecting portion 32b. The lower end 34a of these four members 34 is screwed to the top plate 24. Stopped. Further, in order to prevent the positional deviation of the fan vicinity portion 32a of the side surface portion 32, the steel wire 33 which is also a member constituting the long separation portion 31 and the fan vicinity portion 32a enters the hole (not shown) of the top plate 24. As shown in Fig. 7, it extends downward.

[0020] A large number of first openings OP1 are formed in the long separation portion 31 by lattice-shaped steel wires. The narrow width of these first openings 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. The size of the first opening OP1 is such that the test finger 100 shown in FIG. 12 can be inserted, but the long separation portion 31 that is not large enough to fit a human hand is at least 100 mm away from the outdoor fan 29. Therefore, the fingertip of a person rotates and does not touch the outdoor fan 29.

 On the other hand, the fan vicinity portion 32a of the side surface portion 32 restricts the size of the second opening OP2 formed therein to be small in view of the fact that the distance to the outdoor fan 29 is less than 50 mm in the vicinity. . Specifically, the narrow steel wire pitch P2 of the grid-like steel wire is 11 mm, and the width of the second opening OP2 is reduced to about 9 mm. This avoids a situation in which the test finger 100 shown in FIG. 12 reaches the outdoor fan 29 through the second opening OP2. In other words, even if a person tries to insert a finger into the side 32 from the fan vicinity 32a, the finger hardly turns inside the fan guard 30 and the person's finger rotates! You won't touch it.

 [0021] The connecting portion 32b of the side surface portion 32 is separated from the outdoor fan 29 as compared with the fan vicinity portion 32a, but the steel wire pitch is set to be comparable to the fan vicinity portion 32a.

 As shown in FIG. 12, the test finger 100 mainly includes a stop plate 101 on a disc, a first cylindrical portion 102 extending from the stop plate 101, and a second cylindrical portion 103 extending from the first cylindrical portion 102. The pseudo fingertip portion 104 extends from the second cylindrical portion 103, and the two joint portions are bent at a predetermined angle. The dimensions in FIG. 12 are Ll = 80mm, L2 = 60mm, L3 = 20mm, L4 = 75mm, D = 12mm. That is, the diameter (D) of the second cylindrical portion 103 is 12 mm.

As described above, the fan guard 30 is provided with the long separation portion 31 at a position farther from the outdoor fan 29 than the length (80 mm) of the test finger 100 (position about 110 mm away). Then, even if a person's finger is inserted, the fingertip does not touch the rotating outdoor fan 29, so that the test finger 100 can be inserted into the first opening OP1 of the long separation portion 31 ( Narrower width is more than 20mm). Since such a large first opening OP1 is formed in the long separation portion 31 of the fan guard 30, the air blown out from the air outlet formed by the circular hole of the bell mouth 29a and the top plate 24 is fan guard 30. It comes to the outside of the outdoor unit 2 without receiving a large resistance due to, and the pressure loss force due to the presence of the fan guard 30 is suppressed.

[0022] Further, in the fan guard 30, the side surface portion 32 surrounding the gap in the height direction between the long separation portion 31 and the top plate 24 is also an opening having a size that does not allow human fingers to enter so as to allow ventilation. In this way, the resistance to the air flow blown out from the bell mouth 29a is made as small as possible. This also reduces the pressure loss due to the presence of the fan guard 30.

 Thus, 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, the pressure loss caused by the fan guard 30 is a conventional fan guard that does not allow human fingers to enter in all parts, and uses a fan guard that covers the air outlet close to the outdoor fan. Compared to the case, it is less than half.

[0023] <Control Unit Buttons for Outdoor Unit, High-Brightness Display, and Their Applications> In FIG. 3, what is indicated by a dotted line is a switch box 41 (see FIG. 4) arranged behind the front plate 21. ) Inside the control board 42. On this control board 42, as shown in FIG. 10, a plurality of push buttons 43 are provided.

 Further, as shown in FIG. 3, the front plate 21 of the outdoor unit 2 is provided with a display unit 45 which is a display capable of high luminance display. The display unit 45 is composed of two upper and lower display panel forces that can represent a three-digit number (see FIG. 11).

 (Information display of refrigerant pressure and temperature)

In this air conditioner 1, when a pressure gauge is installed as an option, the pressure sensor of the brazing type and the electronic pressure are different from the conventional case where the Bourdon tube pressure gauge is not flared to the gauge port of the refrigerant pipe. It becomes specification to add a meter! Its high precision electronic The pressure measured by the pressure gauge is displayed on the display unit 45 together with the refrigerant temperature.

[0024] (Automatic refrigerant charging operation)

 The air conditioner 1 has an automatic refrigerant charging operation function. Here, it is possible to fill the refrigerant with an appropriate amount of refrigerant with a high accuracy of 500 grams. When the refrigerant cylinder 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 the cylinder is empty, a display indicating “empty” is displayed on the display unit 45.

 As a result, in the air conditioner 1, on-site work such as manual calculation of additional refrigerant charging amount-refrigerant additional charging 'cylinder balance' manual determination with a pressure gauge is very simple. .

 (Automatic test run)

 The air conditioner 1 has an automatic test operation function performed after an automatic refrigerant charging operation. When one of the push buttons 43 on the control board 42 is pressed after the automatic refrigerant charging operation, checking for incorrect connection of the refrigerant system, checking forgetting to open the gas-side shut-off valve 18 and liquid-side shut-off valve 19, and checking the sensor Then, the refrigerant quantity is checked and the test run is automatically terminated.

[0025] (Refrigerant leak detection operation)

 The air conditioner 1 has a refrigerant leakage detection operation function. This refrigerant leak detection has an accuracy of 500 grams, and the refrigerant leak detection operation is started by pressing one of the push buttons 43 on the control board 42. When push button 43 is pressed, all indoor units 3 automatically start cooling operation, and after detecting the amount of refrigerant leakage in about 30 minutes, it stops and is indicated by the LED on the control board 42 or the indicator on the display 45 Is done. For example, if only 0.6 kilograms is leaked from the initial filling amount, “0.6” is displayed on the display unit 45.

 (Self-diagnosis operation)

In the air conditioner 1, the self-diagnosis operation is started by pressing one of the push buttons 43 on the control board. This self-diagnosis operation contributes to quick inspection. Enables quick failure diagnosis. Specifically, through self-diagnosis operation, the connector of the thermistor, solenoid valve, and electric expansion valve is disconnected or damaged, the compressor is defective, the outdoor unit 2 And abnormal communication between indoor unit 3 and the indoor unit 3 can be estimated.

[0026] In addition, this self-diagnosis operation can be performed after repair or inspection to be used for checking whether or not the repair work is appropriate. Here, it is possible to prevent repair failures such as incorrect thermistor attachment.

 Note that the result of this self-diagnosis operation can also be simply displayed using the display unit 45.

 <Modification>

 (A)

 As shown in FIG. 12, it is preferable that the pair of motor support bases 63 have a structure that reduces the resistance to the air flow from the bottom to the top.

 Here, as each motor support base 63 passed between the horizontal stays 62 in FIG. 4, a channel material 63a having a U-shaped cross section is used, and a member 63b for making the channel material 63a convex with the lower surface facing downwards 63b Weld! The motor support base 63 composed of the channel material 63a and the member 63b has a cross-section as shown in FIG. 12, and when viewed in the cross-section, the center of the bottom surface protrudes downward as compared with both ends. . As a result, the air flow from the bottom to the top becomes as indicated by the arrow A1 in FIG. 13, and the resistance by the motor support base 63 is reduced.

Note that the lower surface shape of the motor support base 63 is not limited to the inverted triangular cross-sectional shape shown in FIG. 12, and the lower surface of the member 63a may have an arc shape.

 (B)

 As shown in FIG. 14, the mounting structure 64 that extends upward from the bottom frame 61 and supports the shut-off valves 18 and 19 preferably has a portal shape.

The mounting structure 64 includes a pair of columns 91 and 91 extending upward from the bottom frame 61, and a horizontal beam 92 connecting the upper ends of the columns 91 and 91. The pillars 91 and 91 and the horizontal beam 92 are formed with unevenness and are squeezed to ensure strength. Then, the force that supports the closing valves 18 and 19 by the horizontal beam 92. An opening OP3 is formed below the closing valves 18 and 19. As a result, when the brazing operation is performed below the shut-off valves 18 and 19 to join the refrigerant communication pipes 17a and 17b, the working space can be secured. Also, route the refrigerant communication pipes 17a and 17b so that they pass through the opening OP3. Both are possible.

 In addition, as shown in FIG. 14, it is preferable to prepare two types of horizontal beams 92 so that the dedicated parts 99 can be supported in the case of a model of cooling and heating.

 (C)

 In the outdoor unit 2 of the air conditioner 1, in the unlikely event of a failure, the operation data (high pressure, low pressure, various set values, subcool, etc.) for 10 minutes before the failure is stored in the memory in the switch box 41. It is preferable to keep it. In this way, data analysis can be performed in detail after a failure, the cause of the failure can be investigated, and measures and failure factors can be easily eliminated.

Claims

The scope of the claims  [1] With fans (29)  An air outlet for taking out the air blown from the fan to the outside;  A fan guard (30) covering the air outlet;  With  The fan guard (30) has a long separation portion (31) that is separated from the length of the fan force test finger (100),  The long separation portion (31) is formed with a first opening (OP1) into which the test finger can be inserted.  Air conditioner outdoor unit (2). [2] The long separation part (31) is separated from the fan by 80 mm or more,  The minimum width of the first opening (OP1) is 12 mm or more,  The outdoor unit (2) for an air conditioner according to claim 1. [3] The long separation portion (31) is separated from the fan by 100 mm or more,  The minimum width of the first opening (OP1) is 15 mm or more,  The outdoor unit (2) of the air conditioning apparatus according to claim 2. [4] The fan guard (30) further includes a fan vicinity (32) in which the distance of the fan force is shorter than the long separation part (31),  A second opening (OP2) through which the test finger cannot be inserted is formed in the fan vicinity (32).  The outdoor unit (2) of the air conditioning apparatus according to any one of claims 1 to 3. [5] The width of the second opening (OP2) is smaller than 12 mm.  The outdoor unit (2) of the air conditioning apparatus according to claim 4. [6] The long separation part (31) is opposed to the air outlet,  The fan vicinity (32) extends from the periphery of the long separation portion toward the periphery of the air outlet,  The outdoor unit (2) of the air conditioning apparatus according to claim 4 or 5.