JP2010169311A - Air-conditioning outdoor unit - Google Patents

Abstract

There is a need for an air-conditioning outdoor unit that can increase the capacity of a heat exchanger while maintaining a conventional unit size and can effectively use a ventilation area with a fast wind speed distribution.
The air conditioner outdoor unit 1 includes a body frame 30 having an air inlet 31 on a side surface, an air outlet 32 on an upper surface and a bottom plate portion 7 on a bottom surface, and a compressor installed on the bottom plate portion 7. 10, piping 11, a blower fan disposed in the upper part of the body frame 30, a first heat exchanger disposed in the air suction port 31 of the body frame 30, and an inner surface of the first heat exchanger And an air outlet after the air sucked from the air inlet 31 by driving of the blower fan passes through the first heat exchanger and the second heat exchanger in that order. In the air conditioner outdoor unit blown upward from 32, the vertical dimension of the second heat exchanger is made shorter than the vertical dimension of the first heat exchanger, and the second heat exchanger is positioned above the first heat exchanger. It has been deployed to.
[Selection] Figure 1

Description

  The present invention relates to an air-conditioning outdoor unit having an outdoor heat exchanger, and relates to an air-conditioning outdoor unit including a first heat exchanger and a second heat exchanger as outdoor heat exchangers.

  As a method of increasing the capacity of the heat exchanger in order to improve the performance of the air conditioner, there is a method of increasing the number of heat exchangers. However, simply increasing the number of heat exchangers will increase the unit size accordingly. Usually, a heat exchanger is bent and installed like a U-shape or L-shape in order to increase the effective heat transfer area, but when the number of heat exchangers increases, bending becomes difficult, and the device However, there was a problem of increasing the size.

  Therefore, in addition to the first heat exchanger that is usually provided, a heat exchanger that increases the capacity of the heat exchanger by providing a second heat exchanger that overlaps with a part in the vertical direction is known. (For example, refer to Patent Document 1). Usually, the heat exchanger is bent and installed like a U-shape or L-shape in order to increase the effective area, and members such as a compressor and a refrigerant pipe are installed on the bottom plate inside the heat exchanger. . And the upper part of a compressor and refrigerant | coolant piping is the case where it is a ventilation space in most cases.

Japanese Patent Laid-Open No. 2003-114065

By the way, when fixing a 2nd heat exchanger to a 1st heat exchanger, when a room air conditioner is assumed, both ends of a 2nd heat exchanger can be fixed by screwing etc., but when a multi air conditioner for buildings is assumed Since the size of the heat exchanger is larger than that of the room air conditioner, there is a problem that it is difficult to fix the second heat exchanger only by fixing with screws at both ends.

  Further, when the second heat exchanger is disposed at a lower position of the first heat exchanger, that is, when both the first heat exchanger and the second heat exchanger are held on the bottom plate, there is no problem with the fixing method. However, since components such as a compressor, an accumulator, and a refrigerant pipe are usually arranged around the lower position of the first heat exchanger, a second heat exchanger is newly provided at the lower position of the first heat exchanger. If it tries to do, the subject that the unit size of an air-conditioning outdoor unit will become large arises.

In addition, outdoor units that are subject to installation space restrictions, such as outdoor units for multi air conditioning systems for buildings, are often installed side by side, so they often have a structure that blows out wind in the top flow direction. The first heat exchanger Holding the second heat exchanger at the lower position of the air also has a problem that the ventilation area with a fast wind speed distribution cannot be effectively used.

  The present invention has been made to solve the above-described problems, and has an air conditioning outdoor unit that can increase the capacity of a heat exchanger while maintaining the conventional unit size and can effectively use a ventilation area with a fast wind speed distribution. The purpose is to provide.

An air conditioner outdoor unit according to the present invention includes a main body frame having an air suction port on a side surface, an air outlet on an upper surface and a bottom plate portion on a bottom surface, at least a compressor of a refrigerant circuit installed on the bottom plate portion, and a main body A blower fan arranged at the upper part in the frame, a first heat exchanger of the refrigerant circuit arranged in the air blowing suction of the main body frame, and a second of the refrigerant circuit arranged along the inner surface of the first heat exchanger The air sucked from the air suction port by driving the blower fan is blown upward from the air outlet after passing through the first heat exchanger and the second heat exchanger in that order. In the outdoor unit of the air conditioner, the vertical dimension of the second heat exchanger is made shorter than the vertical dimension of the first heat exchanger, and the second heat exchanger is arranged at an upper position of the first heat exchanger. To do.

  In the air conditioner outdoor unit according to the present invention, the vertical dimension of the second heat exchanger is set to be shorter than the vertical dimension of the first heat exchanger, and the second heat exchanger is positioned at the upper position of the first heat exchanger having a high wind speed. Since it is deployed, it is possible to perform large-capacity heat exchange by making effective use of parts with high wind speed. In addition, since there is no interference with the refrigerant circuit compressor and other parts arranged above the bottom plate, that is, near the lower portion of the first heat exchanger, the conventional outdoor unit can be used without unnecessarily increasing the size. The size can be maintained.

Embodiment 1 FIG.
FIG. 1 is an overall perspective view of an air-conditioning outdoor unit according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a state in which a front panel of the air-conditioning outdoor unit is removed, and FIG. FIG. 4 is an exploded plan view of the air conditioner outdoor unit shown in FIG. 3, with the blower fan and the controller removed.
In each figure, the air-conditioning outdoor unit 1 of this embodiment includes left and right column portions 5 and 5 erected on the bottom plate portion 7, a front panel 3 attached between the column portions 5 and 5, and the bottom plate portion 7. Ventilated fingered 6 erected from both sides to the back side, top panel 4 installed at the upper ends of pillars 5 and 5, front panel 3 and fingered 6, and top panel 4 A main body frame 30 including a fan guard 2 provided so as to cover an opening at the center is provided. Both side surfaces and the back surface of the main body frame 30 covered with the fingered 6 are air suction ports 31. Further, the ventilation portion of the fan guard 2 is an air outlet 32. A blower fan 8 is disposed in the main body frame 30 below the air outlet 32. On the bottom plate 7, a refrigerant circuit compressor 10, piping 11 and the like are installed. A controller 9 that controls the compressor 10 of the refrigerant circuit, the electromagnetic valve, and the like is disposed at an inner position of the front panel 3.

As shown in FIG. 5, the compressor 10 and the piping 11 provided in the air-conditioning outdoor unit 1 are connected to an indoor heat exchanger 14 disposed in the indoor unit 13, and a refrigerant circuit in which the refrigerant circulates is connected. Constitute. In this refrigerant circuit, during cooling, the gas refrigerant compressed to high temperature and high pressure by the compressor 10 is sent to the outdoor heat exchanger 12 through the four-way valve 15, and is cooled and condensed by the air sucked by the blower fan 8. As a result, it changes to a high-pressure liquid refrigerant. The liquid refrigerant from the outdoor heat exchanger 12 is sent to the indoor unit 2 and adiabatically expanded by the expansion valve 16, and then takes heat from the air sucked by the indoor unit fan in the indoor heat exchanger 14 to evaporate and low-pressure gas refrigerant. To change. This low-pressure gas refrigerant is separated into gas and liquid by an accumulator 17 through a four-way valve 15, and only the refrigerant gas is sucked into the compressor 10 to repeat the compression and condensation refrigeration cycle operations again.

During heating, the refrigerant flow path of the four-way valve 15 is switched, and the refrigerant flow is reversed from that during cooling. That is, the gas refrigerant compressed to high temperature and high pressure by the compressor 10 is cooled and condensed by the air sucked by the indoor unit fan in the indoor heat exchanger 14 through the four-way valve 15, thereby changing to high pressure liquid refrigerant. The liquid refrigerant is adiabatically expanded by the expansion valve 16 to become a low-temperature and low-pressure two-phase refrigerant, and then sent to the outdoor heat exchanger 12. The outdoor heat exchanger 12 takes heat from the air sucked by the outdoor fan 8 and evaporates to become a low-pressure gas refrigerant, which is separated into gas and liquid by the accumulator 17 through the four-way valve 15, and only the refrigerant gas is sucked into the compressor 10. The compression and condensation refrigeration cycle operations are repeated again. As described above, in the outdoor heat exchanger 12, the gas refrigerant is condensed into the liquid refrigerant during cooling, and the two-phase refrigerant evaporates into the gas refrigerant during heating.

  The flow of air generated by the blower fan 8 is shown in FIG. The blower fan 8 is installed at a position above the outdoor heat exchanger 12, and the air flow is caused by rotating the blower fan 8. This air is sucked in the horizontal direction from the three directions of the back surface and both side surfaces of the air-conditioning outdoor unit 1 and passes through the outdoor heat exchanger 12. Thereafter, the air sucked into the main body frame 30 is changed into a vertical flow, and is blown upward through the blower fan 8 from the air outlet 32 on the upper surface of the main body frame 30. In this case, the upper side of the outdoor heat exchanger 12 close to the blower fan 8 has a characteristic that the flow of the intake air becomes faster and the lower side of the outdoor heat exchanger 12 has a characteristic that the flow of the intake air becomes slower. In the figure, the length of the wide arrow representing the intake air corresponds to the flow velocity.

  Here, a perspective view of the outdoor heat exchanger 12 is shown in FIG. The outdoor heat exchanger 12 is disposed on the leeward side of the suction air flow with respect to the first heat exchanger 12a and the first heat exchanger 12a disposed on the windward side of the suction air flow generated by the blower fan 8. It consists of a second heat exchanger 12b. The first heat exchanger 12 a is disposed along the air suction port 31 of the main body frame 30. That is, the air from the air suction port 31 passes in order from the first heat exchanger 12a to the second heat exchanger 12b in the overlapping portion of the first heat exchanger 12a and the second heat exchanger 12b. It is sucked into 30. The first heat exchanger 12a and the second heat exchanger 12b connect a heat transfer tube 19 including a plurality of plate-like fins 18, a pipe called a header 20, and a distributor called a distributor 21. It is comprised by. In this case, at the time of cooling, the high-temperature and high-pressure gas refrigerant compressed by the compressor 10 branches and flows to the headers 20 of the first heat exchanger 12a and the second heat exchanger 12b, exchanges heat in each heat transfer tube 19, and distributes 21 flows out and merges, and at the time of heating, the low-temperature and low-pressure two-phase refrigerant branches and flows to the distributors 21 of the first heat exchanger 12a and the second heat exchanger 12b, evaporates in the heat transfer tubes 19, and the header 20 And then flows out as a gas refrigerant. At this time, the refrigerant flow rate is adjusted by changing the pipe diameter and length from the heat transfer tube 19 to the distributor 21.

The overall shape of each of the first heat exchanger 12a and the second heat exchanger 12b is a U-shape in plan view in which both left and right ends have advanced forward so that air can be sucked in from the back and both sides of the air conditioner outdoor unit 1. The shape is substantially the same. The 2nd heat exchanger 12b is formed in the shape which overlaps with the inner surface of the 1st heat exchanger 12a, and is arranged along the inner surface of the 1st heat exchanger 12a. The vertical dimension of the second heat exchanger 12b is set shorter than the vertical dimension of the first heat exchanger 12a. And the 2nd heat exchanger 12b is arranged in the upper part position of the 1st heat exchanger 12a, is polymerized, and makes the lower side into a non-polymerization part, such as compressor 10 and piping 11 in the lower part. It is designed not to interfere with parts. That is, by arranging the second heat exchanger 12b on the upper part of the first heat exchanger 12a, it is possible to effectively use a portion having a high wind speed. In addition, since the second heat exchanger 12b does not interfere with various components such as the compressor 10 and the piping 11 of the refrigerant circuit disposed above the bottom plate portion 7, that is, near the lower portion of the first heat exchanger 12a. The heat exchange capacity can be increased while maintaining the size of the conventional air conditioner outdoor unit. Needless to say, when the second heat exchanger 12b is arranged as described above, the performance can be improved by using the existing air-conditioning outdoor unit 1.

The air conditioner outdoor unit 1 has a structure in which air is blown upward from the air outlet 32 on the upper surface of the main body frame 30, that is, in the top flow direction. Therefore, the wind is sucked in the horizontal direction by the blower fan 8, passes through the outdoor heat exchanger 12, and is blown out from the main body frame in the vertical direction. Due to the relationship between the fan 18 and the outdoor heat exchanger 12, the closer to the fan 18, the higher the wind speed and the easier the heat exchange, so that the second heat exchanger 12b is provided at the upper position of the first heat exchanger 12a. This leads to efficient heat exchange.

Next, how to attach the second heat exchanger 12b to the first heat exchanger 12a will be described. FIG. 8 is a perspective view showing a mode in which the second heat exchanger is attached to the first heat exchanger in the air-conditioning outdoor unit, FIG. 9 is one part diagram of a hanging member used in the air-conditioning outdoor unit, and FIG. It is a component drawing of another hanging member to be used.
First, the suspension member 35 shown in FIG. 9 is attached to the left and right center portion of the second heat exchanger 12b. The suspension member 35 is used to support the second heat exchanger 12b on the first heat exchanger 12a. That is, the second heat exchanger 12b is hooked on the first heat exchanger 12a by the suspension member 35 attached to the second heat exchanger 12b. The suspension member 35 includes a receiving portion 23 that receives the bottom surface of the second heat exchanger 12b, an upper surface hooking portion 22 that is hooked on the upper surface of the second heat exchanger 12b, and the receiving portion 23 and the upper surface hooking portion. 22 and two vertical connecting portions 26 and 26 that connect to the upper surface 22 and a mounting portion 33 that is formed integrally with the upper surface hooking portion 22 and is supported on the upper surface of the first heat exchanger 12a. Yes. Handle portions 27 and 27 are provided at, for example, the substantially vertical center positions of the left and right vertical coupling portions 26 and 26, respectively. The receiving portion 23 of the hanging member 35 is formed in a U-shaped cross section with an upper surface opened. This receiving part 23 receives the bottom part of the 2nd heat exchanger 12b of a 2nd heat exchanger from the upper surface opening. A drain hole 34 is formed at the bottom of the receiving portion 23.

  On the other hand, the suspension member 35a shown in FIG. 10 is attached to the left and right side portions of the second heat exchanger 12b. This hanging member 35a has the same configuration as the above-described hanging member 35 regardless of the size, and includes an upper surface hooking portion 22a integrated with the mounting portion 33a, a receiving portion 23a having a drain hole 34a, It is comprised from the vertical connection part 26 which has the handle part 27. FIG.

Therefore, as shown in FIG. 8, the upper surface hooking portion 22 of the hanging member 35 is hooked on the upper surface of the back surface portion of the second heat exchanger 12b, and the bottom surface side of the second heat exchanger 12b is the hanging member. It is received by 35 receiving portions 23. The upper surface hooking portion 22 and the receiving portion 23 are fixed to the second heat exchanger 12b by screwing. Similarly, the suspension member 35a is also attached to the side surface portion of the second heat exchanger 12b. And the handle parts 27 and 27 of the suspending members 35 and 35 are held by hand, the second heat exchanger 12b having a weight of about 10 kg is lifted, and the mounting parts 33 and 33a of the suspending members 35 and 35a are lifted from the front. Is placed on the upper surface of the first heat exchanger 12a. At that time, the first heat exchanger 12a is attached so as to be lifted up a little so as not to hit the piping such as the header 20a. Then, the fixing sheet metal 24a attached to both end portions of the first heat exchanger 12a and the fixing sheet metal 24b attached to both end portions of the second heat exchanger 12b are screwed (total of two locations on the left and right side plates). 4 places), the 2nd heat exchanger 12b is fixed to the 1st heat exchanger 12a.

In this case, since the placement portions 33 and 33a of the suspension members 35 and 35a are held on the thin plate-like fins 18 made of aluminum, the grounding between the placement portions 33 and 33a and the fins 18 is performed. The area is important. If the ground contact area is small, the fins 18 are deformed and fall down due to the weight of the second heat exchanger 12b. Therefore, the strength per unit area of the fin 18 is obtained, and an appropriate grounding area is obtained by design so that the fin 18 does not fall even if the second heat exchanger 12b is held. Since the weight of the second heat exchanger 12b is about 10 kg, the total area of the mounting portion 33 and the upper surface hooking portion 22 of the suspension member 35 is designed to be 230 cm 2.
That is, the mounting portions 33 and 33a are formed such that the lateral dimensions are larger than the width of the fins 18 of the first heat exchanger 12a and have a large ground contact area. Even when the heat exchanger 12a is placed on the upper surface of the heat exchanger 12a, deformation of the fins 18 made of aluminum can be prevented.

And since the handle part 27 is provided in the receiving part 23 of the suspension member 35, when attaching the 2nd heat exchanger 12b to the 1st heat exchanger 12a, an operator holds the handle part 27 by hand. It is also possible to attach the handle 27 by suspending it by a machine. In addition, by providing a gap of about 30 mm between the vertical connection portion 26 and the second heat exchanger 12b, not only the handle portion 27 can be easily gripped, but also the influence of air flow obstruction by the vertical connection portion 26 is affected. Can be almost eliminated.

  Further, drainage holes 34, 34a are formed in the receiving portions 23, 23a of the suspension members 35, 35a. During heating, particularly when the outside air is low, the heat exchanger 12 may be frosted. In order to melt this frost, the heating operation is temporarily stopped and switched to the cooling operation for a while, and the frost on the outdoor heat exchanger 12 is controlled to melt. That is, by switching to the cooling operation, a high-temperature and high-pressure gas refrigerant flows through the heat exchanger 12, and frost on the outdoor heat exchanger 12 can be melted by the heat. At this time, when water generated by melting of frost remains between the bottom surfaces of the receiving portions 23 and 23a of the suspension members 35 and 35a and the second heat exchanger 12b, when switching to heating operation, The remaining water freezes rapidly. Therefore, the water generated when the frost attached to the second heat exchanger 12b is melted is quickly allowed to flow down from the drain holes 34 and 34a so that the water is not accumulated on the receiving portions 23 and 23a.

The figure which has arrange | positioned the header to the edge part of the 1st heat exchanger 12a is shown in FIG. Since the header 20 attached to the outdoor heat exchanger 12 is connected to both the first heat exchanger 12a and the second heat exchanger 12b, in the case of the header 20 as shown in FIG. When the second heat exchanger 12b is assembled from the front, it interferes with the side portion of the second heat exchanger 12b. Therefore, in the header 20a from the first heat exchanger 12a as shown in FIG. 11B, a bent portion 36 is provided in the middle. By providing the bent portion 36, the header 20 is disposed at the front position of the right end portion without protruding to the inner surface side of the first heat exchanger 12a at the arrangement height position of the second heat exchanger 12b. Accordingly, the above-described interference is avoided, and the second heat exchanger 12b can be inserted and attached from the front surface.
As described above, the second heat exchanger 12b contacts the header 20 when the operator hooks the second heat exchanger 12b on the first heat exchanger 12a because a part of the header portion 20 is bent. Without interference, the operator can easily hook the second heat exchanger 12b onto the first heat exchanger 12a. In addition, when incorporating the 2nd heat exchanger 12b from upper direction, you may be the 1st heat exchanger 12a which has the header 20 (Fig.11 (a)).

  Furthermore, since the second heat exchanger 12b is sandwiched between the hanging portion 22 of the upper surface hooking portion 22 and the standing portion of the receiving portion 23 that are U-shaped, the thickness of the upper surface hooking portion 22 or the receiving portion 23 is equal to the plate thickness. A clearance with the first heat exchanger 12a can be ensured. By having this clearance, it is possible to prevent a problem that the first heat exchanger 12a and the second heat exchanger 12b are rubbed and damaged by vibrations generated during transportation or the like.

And in the air-conditioning outdoor unit 1 of this embodiment, it becomes possible to hold | maintain the 2nd heat exchanger 12b in the 1st heat exchanger 12a, when the multi air conditioner for buildings was assumed, and maintained the conventional outdoor unit size. It becomes possible to improve the performance of the outdoor air conditioner. Alternatively, when the capacity of the original heat exchanger is more than necessary, the second heat exchanger 12b is reduced in size, for example, to form two and half heat exchangers instead of three rows of heat exchangers. This makes it possible to reduce costs.

It is a whole perspective view of the air-conditioning outdoor unit which concerns on embodiment of this invention. It is a disassembled perspective view which shows the state which removed the front panel of the said air-conditioning outdoor unit. It is a disassembled perspective view which shows the state which removed the ventilation fan and the controller from the air-conditioning outdoor unit of FIG. FIG. 4 is an exploded plan view of the air conditioning outdoor unit in FIG. 3. It is a circuit block diagram of the refrigerant circuit containing the said air-conditioning outdoor unit. It is explanatory drawing which shows the flow of the air in the said air-conditioning outdoor unit. It is a disassembled perspective view which shows the state which removed the compressor and piping further from the air-conditioning outdoor unit of FIG. It is a perspective view which shows the aspect which attaches a 2nd heat exchanger to a 1st heat exchanger in the said air-conditioning outdoor unit. It is one part figure of the suspension member used for the said air-conditioning outdoor unit. It is a component drawing of another hanging member used for the said air-conditioning outdoor unit. It shows one front end face of the first heat exchanger of the air conditioner outdoor unit, (a) is a front view showing an example thereof, and (b) is a front view showing another example thereof.

DESCRIPTION OF SYMBOLS 1 Air-conditioning outdoor unit, 2 Fan guard, 3 Front panel, 4 Top panel, 5 Column part, 6 Fingered, 7 Bottom plate part, 8 Blower fan, 10 Compressor, 11 Piping, 12a 1st heat exchanger, 12b 2nd heat exchanger, 20 header, 20a header, 22 upper surface latching part, 22a upper surface latching part, 23 receiving part, 23a receiving part, 26 vertical connection part, 27 handle part, 30 body frame, 31 air inlet, 32 Air outlet, 33 Placement part, 33a Placement part, 34 Drainage hole, 34a Drainage hole, 35 Suspension member, 35a Suspension member, 36 Bent part.

Claims (5)

A main body frame having an air inlet on a side surface, an air outlet on an upper surface and a bottom plate portion on a bottom surface, at least a compressor of a refrigerant circuit installed on the bottom plate portion, and an upper portion in the main body frame. And a second heat exchanger of the refrigerant circuit disposed along the inner surface of the first heat exchanger. The first heat exchanger of the refrigerant circuit disposed in the air suction of the main body frame, and the second heat exchanger of the refrigerant circuit disposed along the inner surface of the first heat exchanger. The air conditioning system in which the air sucked from the air suction port by driving the blower fan is blown upward from the air outlet after passing through the first heat exchanger and the second heat exchanger in that order. In the outdoor unit, the vertical dimension of the second heat exchanger is made shorter than the vertical dimension of the first heat exchanger, and the second heat exchanger is disposed at an upper position of the first heat exchanger. A featured air conditioner outdoor unit. A receiving portion that receives the bottom surface of the second heat exchanger, an upper surface hooking portion that is hooked on an upper surface of the second heat exchanger, and a vertical coupling portion that connects the receiving portion and the upper surface hooking portion; The second heat exchanger is configured to be integrated with the upper surface hooking portion, and the second heat exchanger is configured to be supported on the upper surface of the first heat exchanger. The air conditioner outdoor unit according to claim 1, wherein the air conditioner outdoor unit is supported by an air conditioner. The air-conditioning outdoor unit according to claim 2, wherein a handle portion is provided at a vertical connection portion of the suspension member. The receiving part of the suspension member is formed in a U-shaped cross-section with an open top surface, and a drainage hole is formed in the bottom part of the receiving part. Air conditioner outdoor unit. Each of the first heat exchanger and the second heat exchanger is formed in a shape in which both left and right end portions are advanced forward, and is used for refrigerant distribution provided at either one of the left and right end portions of the first heat exchanger. The header of the second heat exchanger is disposed at the front position of either of the left and right end portions without protruding to the inner surface side of the first heat exchanger at the height position of the second heat exchanger. The air-conditioning outdoor unit according to any one of claims 2 to 4.

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