Patent Description:
A heat source unit such as an air conditioner includes a compressor. The compressor sucks a low-pressure gas refrigerant into a compression chamber of the compressor, compresses the low-pressure gas refrigerant into a high-pressure gas refrigerant, and discharges the high-pressure gas refrigerant. Therefore, a suction pipe and a discharge pipe are connected to the compression chamber of the compressor. Some compressors implement a technique called gas injection in order to improve performance of a refrigerant circuit. In the gas injection, a pipe called an injection pipe is connected to the compression chamber of the compressor.

The suction pipe, the discharge pipe, and the injection pipe often vibrate due to pressure pulsation of a gas refrigerant during operation. Therefore, noise may be generated or excessive stress may be applied. In addition, there is a risk of pipe breakage due to application of excessive force to these pipes by excitation during transportation. These cause a malfunction of devices. An air conditioner depicted in Patent Literature <NUM> (<CIT>) discloses a configuration of suppressing vibration during operation, but does not disclose a configuration of dealing with excitation applied during transportation.

There is suppressed a malfunction caused by vibration during operation and excitation during transportation.

The document <CIT> discloses a hermetic compressor with two fluid conduits that are interconnected with each other.

The problem is solved by the combination of features of the appended claims comprising a heat source unit of a refrigerant cycle apparatus according to the invention includes a compressor, pipes, and a fixing member. The compressor has three connection portions among a first connection portion, a second connection portion, and a third connection portion. The first connection portion connects a suction pipe. The second connection portion connects a discharge pipe. The third connection portion connects an injection pipe. Each of the pipes has a vertical portion. The vertical portion is a portion at least a part of which extends vertically from each of the two or three connection portions. The fixing member fixes at least two pipes of three of the pipes to each other at the vertical portions. In top view, each of the connection portions of the pipes fixed by the fixing member is located on one first straight line.

With the above configuration, the heat source unit of the refrigerant cycle apparatus suppresses malfunction caused by vibration of the heat source unit during operation and excitation during transportation.

A heat source unit of a refrigerant cycle apparatus according to a second aspect is the heat source unit according to the first aspect, in which the compressor further includes a casing and three or four legs provided below the casing. At least one of the legs exists on a second straight line in top view. The second straight line passes through a center of the casing and is orthogonal to the first straight line.

This configuration contributes to suppression of malfunction of the heat source unit of the refrigerant cycle apparatus.

A heat source unit of a refrigerant cycle apparatus according to a third aspect is the heat source unit of the refrigerant cycle apparatus according to the second aspect, in which each of the three or four legs is attached with a vibration-proof rubber.

A heat source unit of a refrigerant cycle apparatus according to a fourth aspect is the heat source unit of the refrigerant cycle apparatus according to the second aspect, in which at least the leg located at a position farthest from the first straight line among the three or four legs is attached with the vibration-proof rubber different in type from the vibration-proof rubber attached to the legs other than the leg located at the position farthest from the first straight line.

A heat source unit of a refrigerant cycle apparatus according to a fifth aspect is the heat source unit according to any one of the first to fourth aspects, in which the first connection portion, the second connection portion, and the third connection portion are located on the first straight line in top view. The fixing member fixes the suction pipe, the discharge pipe, or the injection pipe to each other.

A heat source unit of a refrigerant cycle apparatus according to a sixth aspect is the heat source unit according to any one of the first to fifth aspects, in which the injection pipe includes a silencer.

A heat source unit of a refrigerant cycle apparatus according to a seventh aspect is the heat source unit according to any one of the first to sixth aspects, in which the fixing member is made from metal.

A compressor according to an eighth aspect includes a casing, three connection portions, and three or four legs. Two or three pipes among a suction pipe, a discharge pipe, and an injection pipe are fixed to the casing. The three connection portions are three connection portions among a first connection portion, a second connection portion, and a third connection portion. The first connection portion connects a suction pipe. The second connection portion connects a discharge pipe. The third connection portion connects an injection pipe. The three or four legs are provided below the casing. In top view, the connection portions are located on one first straight line. At least one of the legs exists on a second straight line. The second straight line passes through a center of the casing and is orthogonal to the first straight line.

A scroll compressor according to a ninth aspect includes three connection portions among a first connection portion, a second connection portion, and a third connection portion, and a scroll compression mechanism. The first connection portion connects a suction pipe. The second connection portion connects a discharge pipe. The third connection portion connects an injection pipe. The scroll compression mechanism includes a fixed scroll, a movable scroll, and an Oldham coupling. In the scroll compressor, an angle formed between a first direction in which a pipe fixing member extends in top view and a reciprocating direction of the Oldham coupling is <NUM>° or less. The pipe fixing member fixes three pipes among the suction pipe, the discharge pipe, and the injection pipe.

When the scroll compressor is driven, the excitation force in an Oldham motion direction increases due to an influence of an inertial force caused by reciprocating of the Oldham coupling, and rigid body vibration occurs in the scroll compressor and the heat source unit including the scroll compressor, which may impair reliability of the scroll compressor and the heat source unit. Patent Literature <NUM> (<CIT>) discloses that vibration is transmitted in a predetermined direction by using a balance weight in consideration of the inertial force. However, by adding the balance weight, manufacturing costs of the scroll compressor and the heat source unit increase.

On the other hand, in the scroll compressor according to the ninth aspect, designing the pipes side by side makes it possible to suppress the vibration of the Oldham coupling in the reciprocating direction without increasing the manufacturing costs.

A heat source unit of a refrigerant cycle apparatus according to a tenth aspect includes the scroll compressor according to the ninth aspect, a suction pipe, a discharge pipe, an injection pipe, and a pipe fixing member. The suction pipe has a first vertical portion connected to a first connection portion. The discharge pipe has a second vertical portion connected to a second connection portion. The injection pipe has a third vertical portion connected to a third connection portion. The pipe fixing member fixes three pipes among the suction pipe, the discharge pipe, and the injection pipe.

Thus, the vibration in the reciprocating direction of the Oldham coupling is suppressed, and the reliability of the heat source unit is secured.

A heat source unit of a refrigerant cycle apparatus according to an eleventh aspect is the heat source unit according to the tenth aspect, in which the pipe fixing member fixes the discharge pipe and the injection pipe.

This configuration contributes to suppression of vibration of the heat source unit.

A heat source unit of a refrigerant cycle apparatus according to a twelfth aspect is the heat source unit according to the tenth aspect, in which the pipe fixing member fixes the suction pipe and the injection pipe.

A heat source unit of a refrigerant cycle apparatus according to a thirteenth aspect is the heat source unit according to the tenth aspect, in which the pipe fixing member fixes the discharge pipe and the suction pipe.

A heat source unit of a refrigerant cycle apparatus according to a fourteenth aspect is the heat source unit according to the tenth aspect, in which the pipe fixing member fixes the suction pipe, the discharge pipe, and the injection pipe.

A heat source unit of a refrigerant cycle apparatus according to a fifteenth aspect is the heat source unit according to any one of the tenth to fourteenth aspects, in which the pipe fixing member is made from metal.

This configuration contributes to ensuring reliability of the heat source unit.

The following embodiment specifically exemplifies the present invention and is not intended to limit the technical scope of the present invention.

<FIG> is a refrigerant circuit diagram of a refrigerant cycle apparatus <NUM> using a scroll compressor <NUM> according to one embodiment of the present invention. Examples of the refrigerant cycle apparatus <NUM> employing the scroll compressor <NUM> include a "refrigerant cycle apparatus dedicated to cooling operation", a "refrigerant cycle apparatus dedicated to heating operation", and a "refrigerant cycle apparatus switchable to cooling operation or heating operation by using a four-way switching valve". Here, for convenience of description, description will be made with a "refrigerant cycle apparatus dedicated to cooling operation".

In <FIG>, the refrigerant cycle apparatus <NUM> includes a utilization unit <NUM> and a heat source unit <NUM>, and the utilization unit <NUM> and the heat source unit <NUM> are connected to each other by a liquid refrigerant connection pipe <NUM> and a gas refrigerant connection pipe <NUM>. As illustrated in <FIG>, the refrigerant cycle apparatus <NUM> is of a separate type including one utilization unit <NUM> and one heat source unit <NUM>. However, the present invention is not limited thereto. Alternatively, the refrigerant cycle apparatus <NUM> may be of a multi-type including a plurality of utilization units <NUM>.

In the refrigerant cycle apparatus <NUM>, devices such as the scroll compressor <NUM>, an outdoor heat exchanger <NUM>, an economizer heat exchanger <NUM>, an expansion valve <NUM>, and an indoor heat exchanger <NUM> are connected by pipes to constitute a refrigerant circuit <NUM>.

The indoor heat exchanger <NUM> mounted on the utilization unit <NUM> is a cross-fin type fin-and-tube heat exchanger including a heat transfer tube and a large number of heat transfer fins. The indoor heat exchanger <NUM> has a liquid side connected to the liquid refrigerant connection pipe <NUM> and a gas side connected to the gas refrigerant connection pipe <NUM>, and functions as an evaporator for refrigerant.

The heat source unit <NUM> is equipped with the scroll compressor <NUM>, the outdoor heat exchanger <NUM>, the economizer heat exchanger <NUM>, the expansion valve <NUM>, and the like. The scroll compressor <NUM> will be described in detail later.

The outdoor heat exchanger <NUM> is a cross-fin type fin-and-tube heat exchanger including a heat transfer tube and a large number of heat transfer fins. One side of the outdoor heat exchanger <NUM> is connected to a discharge pipe <NUM> through which the refrigerant discharged from the scroll compressor <NUM> flows, and the other side of the outdoor heat exchanger <NUM> is connected to a suction pipe <NUM>. The outdoor heat exchanger <NUM> functions as a condenser for a gas refrigerant supplied from the scroll compressor <NUM> via the discharge pipe <NUM>.

As shown in <FIG>, the economizer heat exchanger <NUM> is disposed between the outdoor heat exchanger <NUM> and the expansion valve <NUM>. The economizer heat exchanger <NUM> causes heat exchange between the refrigerant flowing from the outdoor heat exchanger <NUM> toward the expansion valve <NUM> and the refrigerant flowing through an injection pipe <NUM>.

The expansion valve <NUM> is provided on a pipe connecting the outdoor heat exchanger <NUM> and the liquid refrigerant connection pipe <NUM>. The expansion valve <NUM> is an electric valve whose opening degree is adjustable for adjusting a pressure and a flow rate of the refrigerant flowing through the pipe.

<FIG> is a longitudinal sectional view of the scroll compressor <NUM> according to one embodiment of the present invention. <FIG> is a schematic view showing appearance of the scroll compressor <NUM>. <FIG> is a schematic top view of the scroll compressor <NUM>. The scroll compressor <NUM> according to one embodiment of the present invention is a so-called all-hermetic compressor, is connected to the refrigerant circuit <NUM> that performs a refrigeration cycle, and sucks and compresses a refrigerant in the refrigerant circuit <NUM>. The scroll compressor <NUM> is fixed to a bottom plate <NUM> of the heat source unit <NUM>.

In the scroll compressor <NUM>, a scroll compression mechanism <NUM> as a body mechanism, an electric motor <NUM>, a lower bearing member <NUM>, and a drive shaft <NUM> as a rotary shaft are accommodated in an internal space of a casing <NUM>.

The casing <NUM> is a sealed container having a vertically long cylindrical shape. In the internal space of the casing <NUM>, the scroll compression mechanism <NUM>, the electric motor <NUM>, and the lower bearing member <NUM> are disposed in order from top to bottom. The drive shaft <NUM> is disposed such that its axial direction is along a height direction of the casing <NUM>. A detailed structure of the scroll compression mechanism <NUM> will be described later.

As illustrated in <FIG>, the suction pipe <NUM>, the discharge pipe <NUM>, and the injection pipe <NUM> are attached to the casing <NUM> as pipes. The suction pipe <NUM> is connected via a first connection portion 21A to a first vertical portion 21B which is a vertically extending portion of the suction pipe <NUM>. A part of the first vertical portion 21B is welded and fixed to an upper lid 11a of the casing <NUM>. A lower end of the first vertical portion 21B is connected to a fixed scroll <NUM> of the scroll compression mechanism <NUM>. The suction pipe <NUM> communicates with a compression chamber Sc of the scroll compression mechanism <NUM> via the first vertical portion 21B. A low-pressure refrigerant in the refrigeration cycle before being compressed by the scroll compressor <NUM> flows through the suction pipe <NUM> and the first vertical portion 21B.

The discharge pipe <NUM> is connected via a second connection portion 22A to a second vertical portion 22B which is a vertically extending portion of the discharge pipe <NUM>. A part of the second vertical portion 22B is welded and fixed to a cylindrical member 11b of the casing <NUM>. The second vertical portion 22B is disposed so that an end of the second vertical portion 22B inside the casing <NUM> protrudes into a high-pressure space S1 formed below a bearing housing <NUM> of the scroll compression mechanism <NUM>. A high-pressure refrigerant in the refrigeration cycle after being compressed by the scroll compression mechanism <NUM> flows through the discharge pipe <NUM> and the second vertical portion 22B.

The injection pipe <NUM> is connected via a third connection portion 23A to a third vertical portion 23B which is a vertically extending portion of the injection pipe <NUM>. A part of the third vertical portion 23B is welded and fixed to the upper lid 11a of the casing <NUM>. An end of the third vertical portion 23B inside the casing <NUM> is connected to the fixed scroll <NUM>, and the third vertical portion 23B supplies the refrigerant to an injection passage formed in the fixed scroll <NUM>. The injection passage communicates with the compression chamber Sc of the scroll compression mechanism <NUM>, and the refrigerant supplied from the third vertical portion 23B is supplied to the compression chamber Sc as a pressure in a middle (intermediate pressure) between a low pressure and a high pressure in the refrigeration cycle.

In the scroll compressor <NUM> according to the present embodiment, as illustrated in <FIG> and <FIG>, the first vertical portion 21B, the second vertical portion 22B, and the third vertical portion 23B include a coupling pipe fixed to the casing <NUM> and pipes inside and outside the casing <NUM> inserted into the coupling pipe.

As illustrated in <FIG>, in top view, the connection portions 21A, 22A, and 23A of the pipes <NUM>, <NUM>, and <NUM> are disposed so as to be located on one first straight line L1. The pipes <NUM>, <NUM>, and <NUM> extending from the connection portions 21A, 22A, and 23A located on the first straight line L1 have the vertical portions 21B, 22B, and 23B fixed by a fixing member <NUM>.

Specifically, as illustrated in <FIG>, in a top view of an end connecting the connection portions 21A, 22A, and 23A and the pipes <NUM>, <NUM>, and <NUM>, the first straight line L1 is preferably a substantially straight line that connects centers of the connection portions. However, the first straight line L1 may be slightly bent as long as rigid body vibration of the scroll compressor <NUM> can be suppressed. The pipes <NUM>, <NUM>, and <NUM> are disposed so that an angle formed by the first straight line L1 and a reciprocating direction of an Oldham coupling <NUM> described later is <NUM>° or less. The angle may be slightly shifted as long as the pipes <NUM>, <NUM>, and <NUM> can suppress rigid body vibration of the scroll compressor <NUM>.

The pipe fixing member <NUM> fixes parts of the pipes <NUM>, <NUM>, and <NUM> vertically extending from the connection portions 21A, 22A, and 23A to each other. The pipe fixing member <NUM> may be, for example, a metal such as iron, and may be, for example, a sheet-metal member formed to surround each of the pipes <NUM>, <NUM>, and <NUM> in a circumferential direction as illustrated in <FIG>. The pipe fixing member <NUM> may include a vibration reducing member for reducing vibration between the pipe fixing member <NUM> and each of the pipes <NUM>, <NUM>, and <NUM>. This structure can reduce vibration applied to the scroll compression mechanism <NUM>. Details will be described later.

A support bracket <NUM> for fixing the casing <NUM> to the bottom plate <NUM> of an outdoor unit is provided below the casing <NUM>. The support bracket <NUM> includes an attachment portion 13a attached to a bottom of the casing <NUM> to support the casing <NUM> from below, and a support leg (leg) 13b fixed to the bottom plate <NUM> via a vibration-proof rubber <NUM>. The attachment portion 13a and the support leg 13b are formed integrally. Four support legs 13b are provided apart from each another in a circumferential direction of the casing <NUM>.

A part of the bottom plate <NUM> protrudes upward, and the vibration-proof rubber <NUM> is installed on the protrusion of the bottom plate <NUM>. The vibration-proof rubber <NUM> includes a cylindrical rubber material extending in an up-down direction. A fastening nut 15a is welded to the bottom plate <NUM>.

By inserting the fastening bolt 15b from above the support bracket <NUM> and fastening the fastening bolt 15b to the fastening nut 15a, the casing <NUM> is fixed to the bottom plate <NUM> in a state where the vibration-proof rubber <NUM> is sandwiched between each of the support legs 13b of the casing <NUM> and the bottom plate <NUM>.

At least one (here, vibration-proof rubbers 14a and 14b) of the four vibration-proof rubbers <NUM> respectively attached to the support legs 13b is attached so as to exist on a second straight line L2 that passes through a center of the cylindrical member 11b of the casing <NUM>, is orthogonal to the first straight line L1 connecting the pipes <NUM>, <NUM>, and <NUM> as illustrated in <FIG>. Here, orthogonal means that the second straight line L2 is preferably at an angle of <NUM>° ± <NUM>° with respect to the first straight line L1. The angle may be slightly shifted as long as the rigid body vibration of the scroll compressor <NUM> can be suppressed. One vibration-proof rubber 14a of the vibration-proof rubbers 14a and 14b is located at a position farthest from the first straight line L1 than the other three vibration-proof rubbers 14b, 14c, and 14d, and can efficiently reduce vibration applied to the scroll compression mechanism <NUM>. Therefore, the vibration-proof rubber 14a is preferably include a material having a higher spring constant than the other three vibration-proof rubbers 14b, 14c, and 14d.

The electric motor <NUM> includes a stator <NUM> and a rotor <NUM>. The stator <NUM> is fixed to the casing <NUM>. The rotor <NUM> is disposed coaxially with the stator <NUM>. Into the rotor <NUM>, a main shaft <NUM> of the drive shaft <NUM> is inserted.

The drive shaft <NUM> is provided with the main shaft <NUM> and an eccentric portion <NUM>. A lower part of the main shaft <NUM> penetrates the rotor <NUM> of the electric motor <NUM>. The eccentric portion <NUM> has a columnar shape with a diameter smaller than the main shaft <NUM>, and protrudes from an upper end surface of the main shaft <NUM>. The eccentric portion <NUM> has an axis that is eccentric relative to an axis of the main shaft <NUM>.

An oil supply passage <NUM> penetrating in the up-down direction is formed in the drive shaft <NUM>. A refrigerating machine oil as a lubricating oil is stored at the bottom of the casing <NUM>. When the drive shaft <NUM> rotates, the refrigerating machine oil stored at the bottom of the casing <NUM> is sucked up to the oil supply passage <NUM> and supplied to a sliding portion of the lower bearing member <NUM> and the scroll compression mechanism <NUM>.

The scroll compression mechanism <NUM> includes the bearing housing <NUM>, the fixed scroll <NUM>, a movable scroll <NUM>, and the Oldham coupling <NUM>. In the scroll compression mechanism <NUM>, the compression chamber Sc as a fluid chamber is formed by the fixed scroll <NUM> and the movable scroll <NUM>. The Oldham coupling <NUM> is a member to restrict rotation of the movable scroll <NUM>.

The bearing housing <NUM> has a thick disc shape, and has an outer peripheral edge fixed to the casing <NUM>. A central recess <NUM> and an annular projection <NUM> are formed at a center of the bearing housing <NUM>. The central recess <NUM> is a circular pit that opens to an upper surface of the bearing housing <NUM>. The annular projection <NUM> is formed along an outer periphery of the central recess <NUM> and protrudes from the upper surface of the bearing housing <NUM>. An end surface of the annular projection <NUM> is a flat surface.

On the bearing housing <NUM>, a central protrusion <NUM> is formed. The central protrusion <NUM> is located below the central recess <NUM> and protrudes downward. A through hole penetrating the central protrusion <NUM> in the up-down direction is formed in the central protrusion <NUM>, and the main shaft <NUM> of the drive shaft <NUM> is inserted through the through hole to rotatably support the drive shaft <NUM>.

A part of the upper surface of the bearing housing <NUM> outside the annular projection <NUM> is a flat surface <NUM>. As illustrated in <FIG>, the bearing housing <NUM> is provided with two fixed-side key grooves <NUM> that open to the flat surface <NUM>.

The fixed-side key grooves <NUM> are elongated grooves extending along a straight line orthogonal to a center axis of the main shaft <NUM> of the drive shaft <NUM>. The two fixed-side key grooves <NUM> are located opposite to each other across the center axis of the main shaft <NUM> of the drive shaft <NUM>. Fixed-side keys <NUM> of the Oldham coupling <NUM> are engaged with the fixed-side key grooves <NUM>.

As illustrated in <FIG>, the fixed scroll <NUM> and the movable scroll <NUM> are placed on the bearing housing <NUM>. The fixed scroll <NUM> is fixed to the bearing housing <NUM> with a bolt or the like. On the other hand, the movable scroll <NUM> is driven by the drive shaft <NUM> to revolve.

The fixed scroll <NUM> is a member in which a fixed-side end plate <NUM> and a fixed-side lap <NUM> are integrally formed. The fixed-side end plate <NUM> has a disc shape. The fixed-side lap <NUM> has a spiral wall shape and is provided on a lower surface of the fixed-side end plate <NUM>. The fixed scroll <NUM> is a member in which a fixed scroll substrate <NUM> and a fixed-side lap <NUM> extending downward in a spiral shape from the lower surface of the fixed scroll substrate <NUM> are integrally formed.

In the fixed-side end plate <NUM>, a discharge port 61a is formed. The discharge port 61a is a through hole formed near a center of the fixed-side end plate <NUM>, and penetrates the fixed-side end plate <NUM> in a thickness direction. The first vertical portion 21B is inserted near an outer periphery of the fixed-side end plate <NUM>.

The movable scroll <NUM> illustrated in <FIG> is a member in which a movable-side end plate <NUM> and a movable-side lap <NUM> are integrally formed. The movable-side end plate <NUM> has a disc shape. The movable-side lap <NUM> has a spiral wall shape and protrudes from an upper surface of the movable-side end plate <NUM>.

In the movable scroll <NUM>, two movable-side key grooves <NUM> that open to a lower surface of the movable-side end plate <NUM> are formed. Movable-side keys <NUM> of the Oldham coupling <NUM> are engaged with the movable-side key grooves <NUM>.

In the scroll compression mechanism <NUM>, the fixed scroll <NUM> and the movable scroll <NUM> are disposed so that the lower surface of the fixed-side end plate <NUM> and the upper surface of the movable-side end plate <NUM> face each other, and the fixed-side lap <NUM> and the movable-side lap <NUM> mesh with each other. In the scroll compression mechanism <NUM>, the fixed-side lap <NUM> and the movable-side lap <NUM> mesh with each other to form a plurality of compression chambers Sc.

As illustrated in <FIG>, the Oldham coupling <NUM> includes one ring <NUM>, two movable-side keys <NUM>, and two fixed-side keys <NUM>. The ring <NUM> has a rectangular cross section. The ring portion <NUM> has a thickness that is constant over an entire circumference of the ring <NUM>. The ring <NUM> has an upper surface and a lower surface that are flat surfaces parallel to each other. The movable-side keys <NUM> are located above the upper surface of the ring <NUM>. The fixed-side keys <NUM> are located below the lower surface of the ring <NUM>. Here, the two movable-side keys <NUM> and the two fixed-side keys <NUM> are arranged at substantially equally spaced apart from each another in a circumferential direction, but there are numerous variations in the number and arrangement of the keys. Here, the two movable side keys <NUM> are disposed on opposite to each other across a center of the ring <NUM>. The two fixed-side keys <NUM> are disposed on opposite to each other across the center of the ring <NUM>.

As illustrated in <FIG>, the Oldham coupling <NUM> is disposed between the movable-side end plate <NUM> of the movable scroll <NUM> and the bearing housing <NUM>. In the scroll compression mechanism <NUM> in operation, the movable-side keys <NUM> of the Oldham coupling <NUM> are in sliding contact with inner surfaces of the movable-side key grooves <NUM> of the movable scroll <NUM>. The fixed-side keys <NUM> of the Oldham coupling <NUM> are in sliding contact with inner surfaces of the fixed-side key grooves <NUM> of the bearing housing <NUM>. Therefore, the Oldham coupling <NUM> serves to allow the movable scroll <NUM> to revolve with respect to the bearing housing <NUM> and prevent the movable scroll <NUM> from rotating with respect to the bearing housing <NUM>. In other words, the Oldham coupling <NUM> slides on both the bearing housing <NUM> and the movable scroll <NUM>, and thus the movable scroll <NUM> revolves without rotating with respect to the fixed scroll <NUM> fixed to the bearing housing <NUM>.

Hereinafter, operation and motion of the scroll compressor <NUM> will be described. In the scroll compressor <NUM>, when the movable scroll <NUM> revolves, a low-pressure gas refrigerant flowing into the scroll compression mechanism <NUM> through the suction pipe <NUM> is sucked into the compression chamber Sc from around the outer peripheral ends of the fixed-side lap <NUM> and the movable-side lap <NUM>. When the movable scroll <NUM> further moves, the compression chamber Sc is blocked from the suction pipe <NUM> to be in a closed state, and thereafter, the compression chamber Sc moves along the fixed-side lap <NUM> and the movable-side lap <NUM> toward inner peripheral ends of the fixed-side lap <NUM> and the movable-side lap <NUM>. In this process, a volume of the compression chamber Sc gradually decreases, and the gas refrigerant in the compression chamber Sc is compressed.

When the volume of the compression chamber Sc gradually decreases as the movable scroll <NUM> moves, the compression chamber Sc eventually communicates with the discharge port 61a. The refrigerant compressed in the compression chamber Sc (that is, a high-pressure gas refrigerant) flows into a discharge gas passage through the discharge port 61a, and is then discharged to a portion between the scroll compression mechanism <NUM> and the electric motor <NUM> in the internal space of the casing <NUM>. The high-pressure gas refrigerant discharged into the internal space of the casing <NUM> flows out of the casing <NUM> through the discharge pipe <NUM>.

A refrigerating machine oil as a lubricating oil is stored in the internal space of the casing <NUM>. The pressure of the refrigerating machine oil stored in the casing <NUM> is substantially equal to a pressure of the gas refrigerant discharged from the scroll compression mechanism <NUM>. While the scroll compressor <NUM> is operating, the drive shaft <NUM> rotates, the refrigerating machine oil stored at the bottom of the casing <NUM> is sucked up to the oil supply passage <NUM> and supplied to the sliding portion of the lower bearing member <NUM> and the scroll compression mechanism <NUM>.

(<NUM>-<NUM>)
The heat source unit <NUM> of the refrigerant cycle apparatus <NUM> of the present invention includes the compressor <NUM>, pipes, and the fixing member <NUM>. The compressor <NUM> has three connection portions among the first connection portion 21A, the second connection portion 22B, and the third connection portion 23A. The compressor <NUM> includes the casing <NUM> and three or four legs 13b provided below the casing <NUM>. The vibration-proof rubber <NUM> is attached to each of the three or four legs 13b. The first connection portion 21A connects the suction pipe <NUM>. The second connection portion 22A connects the discharge pipe <NUM>. The third connection portion 23A connects the injection pipe <NUM>. Each of the pipes has a vertical portion. The vertical portion is a portion at least a part of which extends vertically from each of the three connection portions. The vertical portion extending from the first connection portion 21A is the first vertical portion 21B. The vertical portion extending from the second connection portion 22A is the first vertical portion 22B. The vertical portion extending from the third connection portion 23A is the third vertical portion 23B. The fixing member <NUM> fixes at least two of the two or three pipes to each other at the vertical portions. The fixing member <NUM> includes a metal. In top view, each of the connection portions of the pipes fixed by the fixing member <NUM> is located on one first straight line L1. At least one leg 13b exists on the second straight line L2 passing through the center of the casing <NUM> and orthogonal to the first straight line L1 in top view.

In the compressor <NUM> of the heat source unit <NUM>, when the electric motor <NUM> is energized, the drive shaft <NUM> drives the movable scroll <NUM>. The movable scroll <NUM> is restricted from rotating by the Oldham coupling <NUM> and does not rotate but revolves.

At this time, in the Oldham coupling <NUM>, the fixed-side keys <NUM> reciprocate in the arrow direction in <FIG> along the fixed-side key grooves <NUM>. Then, due to an influence of an inertial force due to the reciprocating motion of the Oldham coupling <NUM>, an excitation force in a reciprocating direction of the Oldham coupling <NUM> increases. Therefore, vibration due to an unbalanced inertial force of the Oldham coupling <NUM> is transmitted to the casing <NUM>, and the rigid body vibration of the scroll compressor <NUM> increases.

In the present embodiment, by fixing the pipes <NUM>, <NUM>, and <NUM> to each other by the same pipe fixing member in a state of being disposed along the first straight line, it is possible to increase support rigidity in the reciprocating direction of the Oldham coupling <NUM> and to suppress the rigid body vibration of the scroll compressor <NUM> effectively. As a result, stress applied to each pipe due to vibration can be suppressed, a risk of pipe breakage or the like can be reduced, and reliability of the scroll compressor <NUM> can be enhanced. In addition, this configuration is intended to reduce the risk without increasing a production cost of the scroll compressor <NUM>.

(<NUM>-<NUM>)
The scroll compressor <NUM> of the present invention includes three connection portions among the first connection portion 21A, the second connection portion 22A, and the third connection portion 23A, and the scroll compression mechanism <NUM>. The first connection portion 21A connects the suction pipe <NUM>. The second connection portion 22A connects the discharge pipe <NUM>. The third connection portion 23A connects the injection pipe <NUM>. The scroll compression mechanism <NUM> includes the fixed scroll <NUM>, the movable scroll <NUM>, and the Oldham coupling <NUM>. The fixing member <NUM> fixes three pipes among the suction pipe <NUM>, the discharge pipe <NUM>, and the injection pipe <NUM>. In the scroll compressor <NUM>, an angle formed between a first direction in which the pipe fixing member <NUM> extends in top view and the reciprocating direction of the Oldham coupling <NUM> is <NUM>° or less.

In the scroll compressor <NUM>, when the electric motor <NUM> is energized, the drive shaft <NUM> drives the movable scroll <NUM>. The movable scroll <NUM> is restricted from rotating by the Oldham coupling <NUM> and does not rotate but revolves.

(<NUM>-<NUM>)
The heat source unit <NUM> of the refrigerant cycle apparatus <NUM> of the present invention includes the scroll compressor <NUM> configured as described above, the suction pipe <NUM>, the discharge pipe <NUM>, the injection pipe <NUM>, and the pipe fixing member <NUM>. The suction pipe <NUM> has the first vertical portion 21B connected to the first connection portion 21A. The discharge pipe <NUM> has the second vertical portion 22B connected to the second connection portion 22A. The injection pipe <NUM> has the third vertical portion 23B connected to the third connection portion 23A. The pipe fixing member <NUM> fixes three pipes among the suction pipe <NUM>, the discharge pipe <NUM>, and the injection pipe <NUM>. In the present embodiment, the pipe fixing member <NUM> fixes the suction pipe <NUM>, the discharge pipe <NUM>, and the injection pipe <NUM>. The pipe fixing member <NUM> is metal.

The heat source unit <NUM> configured as described above can effectively suppress rigid body vibration of the scroll compressor <NUM> and improve reliability of the scroll compressor <NUM>. In addition, the pipe fixing member <NUM> can more effectively suppress the rigid body vibration by preferably fixing the three pipes among the suction pipe <NUM>, the discharge pipe <NUM>, and the injection pipe <NUM>. By using a metal member having high strength as the pipe fixing member <NUM>, deformation or the like of the pipe fixing member <NUM> can be suppressed, and the reliability of the heat source unit <NUM> can be further enhanced.

Modification <NUM> does not falling under the scope of the claims.

In the present invention, the pipe fixing member <NUM> fixes the suction pipe <NUM>, the discharge pipe <NUM>, and the injection pipe <NUM> extending vertically from the connection portions 21A, 22A, and 23A to each other. As a result, it is preferable to suppress vibration due to the unbalanced inertial force of the Oldham coupling <NUM>. However, two of the three pipes <NUM>, <NUM>, or <NUM> may be fixed to each other by the pipe fixing member <NUM> as long as vibration of the scroll compressor <NUM> can be suppressed. Specifically, the pipe fixing member <NUM> may fix the discharge pipe <NUM> and the injection pipe <NUM> to each other as illustrated in <FIG>, may fix the suction pipe <NUM> and the injection pipe <NUM> to each other as illustrated in <FIG>, or may fix the discharge pipe <NUM> and the suction pipe <NUM> to each other as illustrated in <FIG>.

Since the angle formed by the first straight line L1 in which the pipe fixing member <NUM> fixing two of the three pipes <NUM>, <NUM>, or <NUM> to each other extends in top view and the reciprocating direction of the Oldham coupling <NUM> is <NUM>° or less, the vibration of the scroll compressor <NUM> can be suppressed. Note that the angle may be slightly shifted as long as the vibration of the scroll compressor <NUM> can be suppressed. (<NUM>-<NUM>) Modification <NUM>.

In the present invention, the scroll compressor <NUM> includes the three pipes <NUM>, <NUM>, and <NUM> of the suction pipe <NUM>, the discharge pipe <NUM>, and the injection pipe <NUM>. However, the invention described in the present invention can also be applied to the scroll compressor <NUM> not including the injection pipe <NUM>.

Specifically, the scroll compressor <NUM> includes the suction pipe <NUM> and the discharge pipe <NUM>, and the pipe fixing member <NUM> fixes the discharge pipe <NUM> and the suction pipe <NUM> to each other. This configured can effectively suppress the rigid body vibration of the scroll compressor <NUM> and improve the reliability of the scroll compressor <NUM>.

In the present invention, the scroll compressor <NUM> includes four support legs (legs) 13b. However, the invention described in the present invention can also be applied to the scroll compressor <NUM> including three support legs 13b.

Specifically, in the scroll compressor <NUM> including the three support legs 13b illustrated in <FIG>, the support bracket <NUM> for fixing the casing <NUM> to the bottom plate <NUM> of the outdoor unit is provided below the casing <NUM>. The support bracket <NUM> includes the support legs (legs) 13b each fixed to the bottom plate <NUM> via a vibration-proof member <NUM>. Three support legs 13b are provided apart from each another in the circumferential direction of the casing <NUM>.

The vibration-proof member <NUM> includes a cylindrical rubber material extending in the up-down direction. One of the three vibration-proof members <NUM> respectively attached to the support legs 13b is attached so as to exist on the second straight line L2 that passes through the center of the cylindrical member 11b of the casing <NUM>, is orthogonal to the first straight line L1 which connects the pipes <NUM>, <NUM>, and <NUM>. Here, orthogonal means that the second straight line L2 is preferably at an angle of <NUM>° ± <NUM>° with respect to the first straight line L1. The angle may be slightly shifted as long as the rigid body vibration of the scroll compressor <NUM> can be suppressed.

In the present invention, the injection pipe <NUM> may include a silencer. Accordingly, noise generated in the heat source unit <NUM> can be suppressed.

Claim 1:
A heat source unit (<NUM>) of a refrigerant cycle apparatus (<NUM>), the heat source unit (<NUM>) comprising:
a compressor (<NUM>) including three connection portions among a first connection portion (21A) connecting a suction pipe (<NUM>), a second connection portion (22A) connecting a discharge pipe (<NUM>), and a third connection portion (23A) connecting an injection pipe (<NUM>);
a pipe including a vertical portion at least a part of which extends vertically from each of the three connection portions; and
a fixing member (<NUM>) that fixes the vertical portions of the pipes, wherein
each of the connection portions of the pipes fixed by the fixing member is located on one first straight line (L1) in top view,
wherein
the first connection portion (21A), the second connection portion (22A), and the third connection portion (23A) are located on the first straight line (L1) in top view, and
the fixing member (<NUM>) fixes the suction pipe (<NUM>), the discharge pipe (<NUM>), and the injection pipe (<NUM>) to each other.