JP5900457B2 - Outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit.

  Conventionally, it has been known that an outdoor unit of an air conditioner is provided with a service port branched from a part of a refrigerant pipe for measuring a refrigerant pressure, adding a refrigerant, or the like.

  For example, an outdoor unit of an air conditioner described in Patent Document 1 discloses an example in which a service port is provided at a position close to a front side plate in a machine room in which a compressor and electrical components are provided.

Moreover, the service port described in Patent Document 1 is provided so as to branch from a portion of the refrigerant circuit between the discharge side of the compressor and the outdoor heat exchanger.
JP 2008-298344 A

  In the outdoor unit of the air conditioner shown in Patent Document 1 as described above, the service port is provided so as to branch from between the discharge side of the compressor and the outdoor heat exchanger. It is possible to measure the pressure of the refrigerant discharged from the compressor before passing through and the pressure being attenuated.

  However, the service port is disposed below the electrical components, and it is necessary to remove the entire right front plate of the outdoor casing in order to access the service port during trial operation and maintenance.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an outdoor unit capable of improving the accessibility to a service port when measuring the pressure of refrigerant discharged from a compressor. Is to provide.

In the outdoor unit according to the first aspect, the blower chamber and the machine chamber are formed by dividing the inner space of the substantially rectangular parallelepiped casing into the left and right by the partition plate, and the refrigerant circuit is configured by being connected to the indoor unit. The outdoor unit to be configured includes a compressor, an outdoor heat exchanger, a high-pressure gas pipe, a branch pipe, an electrical component, and a side plate. The high-pressure gas pipe connects the discharge side of the compressor and one end of the outdoor heat exchanger. The branch pipe is branched from the high-pressure gas pipe and has a service port at the tip. The electrical component can control at least the drive of the compressor. The side plate has an electrical component access opening provided facing the electrical component so as to allow access to the electrical component, and constitutes a side surface of the casing. The service port of the branch pipe is disposed at a position accessible from the electrical component access opening, and is located in the frame of the electrical component access opening and in front of the electrical component in a side view. The service port has a portion that is open in a downward or diagonally downward direction that is different from the direction on the electrical component side.

  Accessibility is not particularly limited, but includes, for example, a structure that can be reached by a human hand, or a structure that can be used with a tool.

  In this outdoor unit, the branch pipe having the service port is provided so as to branch from a part of the high-pressure gas pipe extending from the discharge side of the compressor to one end of the outdoor heat exchanger. For this reason, it is possible to measure the pressure of the refrigerant discharged from the compressor using the service port. When working using the service port in this way, the service port can be accessed through the electrical component access opening, and there is no need to remove the side plate of the outdoor unit. As described above, the pressure of the refrigerant discharged from the compressor before passing through the outdoor heat exchanger can be measured without removing the side plate of the outdoor unit.

  Moreover, in this outdoor unit, it is possible to prevent the refrigerating machine oil and the like from being scattered with respect to the electrical components when working using the service port.

  The outdoor unit according to the second aspect is the outdoor unit according to the first aspect, and the high-pressure gas pipe is a part extending along the side plate so that the branching part vicinity of the branching pipe is located in the vicinity of the electrical component access opening have.

  In this outdoor unit, the length of the branch pipe extending to the electrical component access opening can be reduced by arranging the high-pressure gas pipe along the vicinity of the electrical component access opening on the side plate. For this reason, it is possible to reduce the degree of vibration that may occur in the branch pipe.

  The outdoor unit according to the third aspect is an outdoor unit according to the second aspect, and further includes a buffer member. The buffer member is interposed between a portion extending along the side plate of the high-pressure gas pipe and the side plate.

  In this outdoor unit, even when a part of the high pressure gas pipe is provided along the side plate, it is possible to suppress contact between the side plate and the high pressure gas pipe.

  The outdoor unit according to the fourth aspect is an outdoor unit according to any one of the first to third aspects, and the high-pressure gas pipe has a portion extending in the horizontal direction in the vicinity of the branch portion of the branch pipe. Yes. The branch pipe has a vertical pipe portion that branches and extends vertically upward from the upper wall of the portion where the high-pressure gas pipe extends in the horizontal direction.

In this outdoor unit, the vertical piping portion of the branch piping branches vertically upward from the upper wall of the portion extending in the horizontal direction of the high-pressure gas piping and extends to the service port. For this reason, it becomes possible to improve the measurement accuracy of the pressure of the refrigerant discharged from the compressor .

The outdoor unit according to the first aspect, without removing the side plate of the outdoor unit, it is possible to measure the pressure of the refrigerant discharged from the front of the compressor passing through the outdoor heat exchanger, the refrigerating machine oil with respect to electrical components And the like can be prevented from scattering.

  In the outdoor unit according to the second aspect, the degree of vibration that can occur in the branch pipe can be reduced.

  In the outdoor unit according to the third aspect, it is possible to suppress contact between the side plate and the high-pressure gas pipe.

In the outdoor unit according to the fourth aspect, the measurement accuracy of the pressure of the refrigerant discharged from the compressor can be increased .

The circuit diagram showing the outline of the composition of the air harmony device concerning one embodiment. The external appearance perspective view of an air-conditioning outdoor unit. The schematic top view of an air-conditioning outdoor unit. The Mollier diagram regarding a refrigerant circuit. The right back view perspective view of the air-conditioning outdoor unit which removed the top plate, the side plate, the machine room side front plate, and the like. The right back view perspective view of the electrical equipment access opening periphery of the air-conditioning outdoor unit which removed the cover. The right view of the electric equipment access opening periphery of the air-conditioning outdoor unit which removed the cover. The schematic perspective view of the state by which the buffer member is attached to outdoor gas refrigerant piping and branch piping. Explanatory drawing which shows the mode of the range where refrigeration oil scatters from a service port.

(1) Overall Configuration of Air Conditioner 1 FIG. 1 is a circuit diagram showing an outline of a configuration of an air conditioner 1 according to an embodiment of the present invention.

  The air conditioner 1 is an apparatus used for air conditioning in a building in which the air conditioning indoor unit 90 is installed by performing a vapor compression refrigeration cycle operation, and is used with the air conditioning outdoor unit 20 as a heat source side unit. The air conditioning indoor unit 90 as a side unit is configured by being connected via a gas refrigerant communication pipe 2 and a liquid refrigerant communication pipe 3.

  The refrigerant circuit 10 includes an air conditioning outdoor unit 20, an air conditioning indoor unit 90, a gas refrigerant communication pipe 2, and a liquid refrigerant communication pipe 3, and includes a bypass circuit 50. The refrigerant circuit 10 includes a gas-liquid separator 22, a compressor 24, a four-way switching valve 26, an outdoor heat exchanger 28, an outdoor expansion valve 31, a liquid receiver 33, an outdoor expansion valve 91, an outdoor heat exchanger 93, and a bypass. The circuit 50 etc. are comprised by connecting with refrigerant | coolant piping. A refrigerant is sealed in the refrigerant circuit 10, and a refrigeration cycle operation is performed in which the refrigerant is compressed, cooled, decompressed, heated and evaporated, and then compressed again. As the refrigerant, for example, one selected from R410A, R32, R407C, R22, R134a, carbon dioxide and the like is used.

(2) Detailed configuration of air conditioner 1 (2-1) Air conditioning indoor unit 90
The air conditioner indoor unit 90 is installed on a wall surface of the room by wall hanging or the like, or embedded or suspended in a ceiling of a room such as a building. The air conditioning indoor unit 90 includes an indoor expansion valve 91, an indoor heat exchanger 93, and an indoor fan 94. The indoor heat exchanger 93 is a cross fin type fin-and-tube heat exchanger composed of, for example, heat transfer tubes and a large number of fins, and functions as a refrigerant evaporator during cooling operation to cool indoor air. In the heating operation, the heat exchanger functions as a refrigerant condenser and heats indoor air. The indoor expansion valve 91 and the indoor heat exchanger 93 are connected via an indoor refrigerant pipe 92. The liquid refrigerant communication pipe 3 is connected to the indoor expansion valve 91 on the side opposite to the indoor refrigerant pipe 92 side. The indoor fan 94 is a fan capable of changing the air volume of air supplied to the indoor heat exchanger 93, and is provided with an indoor fan motor 94m for adjusting the fan air volume.

(2-2) Air conditioner outdoor unit 20
The air conditioning outdoor unit 20 is installed outside a building or the like, and is connected to the air conditioning indoor unit 90 via the gas refrigerant communication pipe 2 and the liquid refrigerant communication pipe 3.

  The air-conditioning outdoor unit 20 has a substantially rectangular parallelepiped unit casing 70 as shown in FIGS. 2 and 3.

  As shown in FIG. 3, the air conditioner outdoor unit 20 has a structure in which the blower chamber S1 and the machine chamber S2 are formed by dividing the internal space of the unit casing 70 into two by a partition plate 78 extending in the vertical direction. (So-called trunk type structure). The air conditioning outdoor unit 20 includes an outdoor heat exchanger 28 and an outdoor fan 29 disposed in the blower chamber S1 of the unit casing 70, and a gas-liquid separator 22 disposed in the machine chamber S2 of the unit casing 70. , The compressor 24, the four-way switching valve 26, the outdoor expansion valve 31, the liquid receiver 33, the bypass circuit 50, the electrical equipment 7 and the like.

  The unit casing 70 includes a bottom plate 72, a top plate 71, a side plate 73 on the blower chamber side, a side plate 74 on the machine chamber side, a front plate 75 on the blower chamber side, and a front plate 76 on the machine chamber side. A rectangular parallelepiped casing is formed. The machine room side front plate 76 includes a right side corner portion of the front surface portion of the unit casing 70. The side plate 74 is configured to cover the rear side portion of the machine room side front plate 76 in the right side surface portion of the unit casing 70 and include the right side corner portion of the back surface portion. The side plate 74 has an electrical component access opening 74 a that opens in the left-right direction, which is the thickness direction, at a position corresponding to the housing position of the electrical component 7. Further, the side plate 74 has a cover 74b for covering the electrical component access opening 74a.

  The air conditioner outdoor unit 20 is configured to suck outdoor air into the blower chamber S <b> 1 in the unit casing 70 from a part of the back surface and side surface of the unit casing 70, and blow out the sucked outdoor air from the front surface of the unit casing 70. . Specifically, the suction port 70a and the suction port 70b with respect to the blower chamber S1 in the unit casing 70 are the end on the back side of the side plate 73 on the blower chamber side and the end on the blower chamber S1 side of the side plate 74 on the machine chamber side. And is formed over. Moreover, the blower outlet 70c is provided in the fan room side front board 75, and the front side is covered with the fan grill 75a.

  The gas-liquid separator 22 has a gas-liquid separation function that divides the refrigerant into a gas phase and a liquid phase. The refrigerant flowing into the gas-liquid separator 22 is divided into a liquid phase and a gas phase, and the gas phase refrigerant that collects in the upper space is supplied to the compressor 24. The end portion of the outdoor low-pressure gas refrigerant pipe 21 extending from the first port that is one of the four connection ports of the four-way switching valve 26 is provided so as to extend to the inside of the container. A suction refrigerant pipe 23 extends from the upper part of the gas-liquid separator 22 and is connected to the suction side of the compressor 24.

  The compressor 24 is a hermetic compressor driven by a compressor motor, for example, and is configured to be able to change the operating capacity by inverter control. The refrigerant discharged from the compressor 24 is connected to a third port which is one of the four connection ports of the four-way switching valve 26 via the discharge refrigerant pipe 25. The end of the gas refrigerant communication pipe 2 on the air conditioning outdoor unit 20 side is connected to a second port that is one of the four connection ports of the four-way switching valve 26. An outdoor gas refrigerant pipe 27 that is a high-pressure gas pipe extends from a fourth port, which is one of the four connection ports of the four-way switching valve 26, and is connected to one end of the outdoor heat exchanger 28. Yes. A gas shut-off valve 2 a is provided in the middle of the gas refrigerant communication pipe 2 at the gas side end of the air conditioning outdoor unit 20. In the middle of the liquid refrigerant communication pipe 3, a liquid closing valve 3 a is provided at the liquid side end of the air conditioning outdoor unit 20. The gas closing valve 2a and the liquid closing valve 3a are located below the air conditioner outdoor unit 20, specifically, below the side plate 14 of the unit casing 70.

  A branch pipe 80 having a vertical pipe portion 81, an inclined pipe portion 82, and a service port 83 extends from the outdoor gas refrigerant pipe 27. Details of the structure of the branch pipe 80 will be described later.

  The four-way switching valve 26 is a mechanism for switching the direction of refrigerant flow. During the cooling operation, the four-way switching valve 26 connects the discharge refrigerant piping 25 on the discharge side of the compressor 24 and the outdoor gas refrigerant piping 27 extending from one end (gas side end) of the outdoor heat exchanger 28, and The gas refrigerant communication pipe 2 and the suction refrigerant pipe 23 on the suction side of the compressor 24 are connected via the liquid separator 22 (see the solid line of the four-way switching valve 26 in FIG. 1). Further, during the heating operation, the four-way switching valve 26 connects the discharge refrigerant pipe 25 on the discharge side of the compressor 24 and the gas refrigerant communication pipe 2, and at the suction side of the compressor 24 via the gas-liquid separator 22. Are connected to an outdoor gas refrigerant pipe 27 extending from one end (gas side end) of the outdoor heat exchanger 28 (see the broken line of the four-way switching valve 26 in FIG. 1).

  One end (gas side end) of the outdoor heat exchanger 28 is connected to the four-way switching valve 26 via the outdoor gas refrigerant pipe 27. The other end (liquid side end) of the outdoor heat exchanger 28 is connected to the outdoor expansion valve 31 via the first outdoor liquid refrigerant pipe 30.

  The outdoor expansion valve 31 is connected to a liquid receiver 33 via a second outdoor liquid refrigerant pipe 32 on the side opposite to the first outdoor liquid refrigerant pipe 30 side. The outdoor expansion valve 31 is a mechanism for decompressing the refrigerant in the refrigerant circuit, and is an electric valve capable of adjusting the opening degree, and adjusts the refrigerant pressure and the refrigerant flow rate.

  The liquid receiver 33 can store the refrigerant in the internal space and has a function of absorbing excess refrigerant in the refrigerant circuit 10. The end of the second outdoor liquid refrigerant pipe 32 opposite to the outdoor expansion valve 31 side extends to the lower side of the internal space of the liquid receiver 33. Further, the liquid refrigerant communication pipe 3 extends from below the internal space of the liquid receiver 33. The liquid refrigerant communication pipe 3 is connected to the indoor expansion valve 91. A bypass refrigerant pipe 51 of the bypass circuit 50 extends from above the internal space of the liquid receiver 33.

  The bypass circuit 50 is provided to connect the liquid receiver 33 and the outdoor low-pressure gas refrigerant pipe 21 on the upstream side of the gas-liquid separator 22. The bypass circuit 50 includes a bypass refrigerant pipe 51, a bypass opening / closing valve 52, and a capillary tube 60. Have. The bypass refrigerant pipe 51 extends from above the internal space of the liquid receiver 33, and is connected to the outdoor low-pressure gas refrigerant pipe 21 at the junction P through the bypass opening / closing valve 52. By opening the bypass opening / closing valve 52 in the bypass circuit 50, the refrigerant above the internal space of the liquid receiver 33 can be sent to the outdoor low-pressure gas refrigerant pipe 21 via the capillary tube 60. .

  The outdoor fan 29 is disposed in the blower chamber so as to face the outdoor heat exchanger 28, and outdoor air for exchanging heat with the refrigerant flowing through the outdoor heat exchanger 28 is supplied to the outdoor heat exchanger 28. Supply. The outdoor fan 29 is a fan capable of changing the air volume of air supplied to the outdoor heat exchanger 28, and is provided with an outdoor fan motor 29m for adjusting the fan air volume.

  The electrical component 7 has a control board, a terminal block, and the like. The electrical component 7 includes the capacity control of the compressor 24 of the air conditioner outdoor unit 20, the air volume control of the outdoor fan 29, the open / close control of the bypass on / off valve 52, the valve opening degree adjustment control of the outdoor expansion valve 31, and the four-way switching valve 26. The connection state can be switched.

(3) Operation of the Air Conditioner 1 (3-1) Cooling Operation During the cooling operation, the four-way switching valve 26 is in the state indicated by the solid line in FIG. 1, that is, the discharge side of the compressor 24 is connected to the outdoor gas refrigerant pipe 27. To the gas side of the outdoor heat exchanger 28, and the suction side of the compressor 24 is connected to the gas side of the indoor heat exchanger 93 via the gas-liquid separator 22 and the gas refrigerant communication pipe 2. It is in a state. The outdoor expansion valve 31 reduces the pressure of the passing refrigerant from a high pressure to an intermediate pressure. The indoor expansion valve 91 reduces the pressure of the passing refrigerant from an intermediate pressure to a low pressure.

  When the compressor 24, the outdoor fan 29, and the indoor fan 94 are operated in the connected state of the refrigerant circuit 10, a refrigeration cycle is performed as shown in the Mollier diagram of FIG. 4 (in the refrigerant circuit 10 of FIG. 1). Symbols A, B, C, D, E, F, G, and H correspond to the same symbols in the Mollier diagram of FIG. 4).

  That is, the low-pressure gas refrigerant is compressed by the compressor 24 to become a high-pressure gas refrigerant. This high-pressure gas refrigerant is sent to the outdoor heat exchanger 28 via the four-way switching valve 26. Thereafter, the high-pressure gas refrigerant is condensed in the outdoor heat exchanger 28 by exchanging heat with the outdoor air supplied by the outdoor fan 29 to become a high-pressure liquid refrigerant. The supercooled high-pressure liquid refrigerant is sent from the outdoor heat exchanger 28 to the outdoor expansion valve 31. The refrigerant that has been decompressed to an intermediate pressure by the outdoor expansion valve 31 and is in a gas-liquid two-phase state flows into the liquid receiver 33. The liquid refrigerant in the liquid receiver 33 is supplied to the indoor expansion valve 91 via the liquid refrigerant communication pipe 3, and is reduced in pressure from the intermediate pressure to the vicinity of the suction pressure of the compressor 24 by the indoor expansion valve 91, and the low-pressure gas-liquid two-phase. It becomes a state. Thereafter, the refrigerant is sent to the indoor heat exchanger 93, where heat is exchanged with the indoor air in the indoor heat exchanger 93 to evaporate into a low-pressure gas refrigerant.

  This low-pressure gas refrigerant is sent to the air-conditioning outdoor unit 20 via the gas refrigerant communication pipe 2 and again sucked into the compressor 24. Thus, in the cooling operation, the air conditioner 1 uses the outdoor heat exchanger 28 as a refrigerant condenser to be compressed in the compressor 24 and the indoor heat exchanger 93 as the refrigerant condensed in the outdoor heat exchanger 28. To function as an evaporator.

  Note that the refrigerant containing a large amount of the refrigerant in the upper gas state in the internal space of the liquid receiver 33 is upstream of the gas-liquid separator 22 via the bypass circuit 50 in a state where the bypass on-off valve 52 is opened. It is led to the middle of the outdoor low-pressure gas refrigerant pipe 21 on the side. Here, the refrigerant that has flowed out of the liquid receiver 33 passes through the bypass refrigerant pipe 51, the bypass on-off valve 52, and the capillary tube 60 in this order. Here, when passing through the capillary tube 60, the refrigerant is depressurized from an intermediate pressure to a low pressure.

(3-2) Heating operation During the heating operation, the four-way switching valve 26 is in the state indicated by the broken line in FIG. 1, that is, the discharge side of the compressor 24 is gas in the indoor heat exchanger 93 via the gas refrigerant communication pipe 2. And the suction side of the compressor 24 is connected to the gas side of the outdoor heat exchanger 28 via the outdoor gas refrigerant pipe 27. The indoor expansion valve 91 reduces the pressure of the passing refrigerant from a high pressure to an intermediate pressure. The outdoor expansion valve 31 reduces the pressure of the passing refrigerant from an intermediate pressure to a low pressure.

  When the compressor 24, the outdoor fan 29, and the indoor fan 94 are operated with the refrigerant circuit 10 connected, the low-pressure gas refrigerant is sucked into the compressor 24 and compressed into a high-pressure gas refrigerant, and the four-way switching valve. 26 and the gas refrigerant communication pipe 2 are sent to the air conditioning indoor unit 90. In addition, the Mollier diagram at the time of heating operation is omitted.

  The high-pressure gas refrigerant sent to the air-conditioning indoor unit 90 undergoes heat exchange with room air in the indoor heat exchanger 93 to condense into a high-pressure liquid refrigerant, and then passes through the indoor expansion valve 91. The pressure is reduced according to the opening degree of the indoor expansion valve 91, and the pressure is changed from high pressure to intermediate pressure. The decompressed refrigerant passing through the indoor expansion valve 91 enters a gas-liquid two-phase state, passes through the liquid refrigerant communication pipe 3, and flows into the liquid receiver 33. The liquid refrigerant in the liquid receiver 33 is supplied to the outdoor expansion valve 31 via the second outdoor liquid refrigerant pipe 32, and is reduced from the intermediate pressure to the vicinity of the suction pressure of the compressor 24 in the outdoor expansion valve 31 to be a low-pressure gas-liquid. It becomes a two-phase state. Thereafter, the refrigerant flows into the outdoor heat exchanger 28. The low-pressure gas-liquid two-phase refrigerant flowing into the outdoor heat exchanger 28 exchanges heat with the outdoor air supplied by the outdoor fan 29 to evaporate into a low-pressure gas refrigerant, and passes through the four-way switching valve 26. Then, it is sucked into the compressor 24 again. Thus, in the heating operation, the air conditioner 1 uses the indoor heat exchanger 93 as a refrigerant condenser compressed in the compressor 24 and the outdoor heat exchanger 28 condensed in the indoor heat exchanger 93. To function as an evaporator.

  Note that the refrigerant containing a large amount of the refrigerant in the upper gas state in the internal space of the liquid receiver 33 is upstream of the gas-liquid separator 22 via the bypass circuit 50 in a state where the bypass on-off valve 52 is opened. It is led to the middle of the outdoor low-pressure gas refrigerant pipe 21 on the side. Here, the refrigerant that has flowed out of the liquid receiver 33 passes through the bypass refrigerant pipe 51, the bypass on-off valve 52, and the capillary tube 60 in this order. Here, when passing through the capillary tube 60, the refrigerant is depressurized from an intermediate pressure to a low pressure.

(4) Outdoor gas refrigerant piping 27
FIG. 5 is a right rear perspective view of the air conditioner outdoor unit 20 from which the top plate 71, the side plate 74, the machine room front plate 76, and the like are removed. FIG. 6 is a right rear perspective view of the vicinity of the electrical component access opening 74a of the air conditioner outdoor unit 20 with the cover 74b removed. FIG. 7 shows a right side view around the electrical component access opening 74a of the air conditioner outdoor unit 20 with the cover 74b removed. FIG. 8 is a schematic perspective view showing a state in which the buffer member 88 is attached to the outdoor gas refrigerant pipe 27 and the branch pipe 80.

  As shown in FIG. 5, the outdoor gas refrigerant pipe 27 is disposed on the upper right side of the air-conditioning outdoor unit 20.

  As shown in FIG. 8, the outdoor gas refrigerant pipe 27 extends downward so as to approach the side plate 14 until just before the side plate 14 of the unit casing 70 after descending downward from one port of the four-way switching valve 26. .

  Thereafter, the outdoor gas refrigerant pipe 27 extends upward along the side plate 14 and then is connected to a horizontal pipe portion 27 a extending rearward in the horizontal direction along the side plate 14.

  The rear end portion of the horizontal pipe portion 27a extends further upward, and then extends to the gas side end portion of the outdoor heat exchanger 28.

  In this way, the outdoor gas refrigerant pipe 27 connects one port of the four-way switching valve 26 and the gas side end of the outdoor heat exchanger 28 to the side plate 14 of the unit casing 70 in the middle of the connection. It has a portion arranged along.

(5) Branch piping 80
As shown in FIG. 8, the branch pipe 80 has a vertical pipe portion 81, an inclined pipe portion 82, and a service port 83.

  The vertical pipe portion 81 extends from the upper wall in the middle of the horizontal pipe portion 27a of the outdoor gas refrigerant pipe 27 so as to branch upward in the vertical direction. Specifically, as shown in FIG. 6, the vertical pipe portion 81 extends further upward in the vertical direction near the front side than the front edge of the electrical component access opening 74 a of the side plate 14 of the unit casing 70. .

  The inclined pipe portion 82 extends from the vicinity of the upper end of the vertical pipe portion 81 on the side plate 14 side of the unit casing 70, rearward and downward. Specifically, as shown in FIG. 7, the inclined pipe portion 82 has a front edge of the electrical component access opening 74 a from the front side of the front side edge of the electrical component access opening 74 a of the side plate 14 of the unit casing 70. It extends to the rear side of the part.

  As shown in FIGS. 5 to 8, the service port 83 is provided at the tip of the inclined pipe portion 82 and includes a service opening 83 a and a service cap 83 b. The service port 83 is in the frame of the opening of the electrical component access opening 74a when viewed from the side (when viewed from the outside of the electrical component access opening 74a), and on the near side (outside) of the electrical component 7 positioned. The service cap 83b is a nut-shaped member indicated by a solid line in FIGS. The service opening 83a is an opening that communicates in the longitudinal direction at the tip of the inclined pipe portion 82 indicated by a dotted line in FIG. The service opening 83a is an outer side different from the direction on the electrical component 7 side, and is opened obliquely downward, and is not opened toward the electrical component 7 side. The service opening 83a is normally closed by attaching a service cap 83b. Further, at the time of maintenance or the like, the service cap 83b is removed, and a pressure gauge, a refrigerant tank for additional refrigerant charging, or the like is connected to the service opening 83a. As shown in FIG. 7, the service port 83 is located in the frame of the electrical component access opening 74a of the side plate 14 of the unit casing 70 in a side view, and can be easily accessed by removing the cover 74b of the side plate 14. It has become.

(6) Buffer member 88
As shown by a dotted line in FIG. 8, the buffer member 88 is provided so as to cover the horizontal pipe portion 27 a of the outdoor gas refrigerant pipe 27 and the vertical pipe portion 81 of the branch pipe 80 from the periphery.

  The buffer member 88 is interposed between the horizontal pipe portion 27a of the outdoor gas refrigerant pipe 27 and the vertical pipe portion 81 of the branch pipe 80, and the inner side surface of the side plate 14 of the unit casing 70, so as to alleviate the collision with each other. It is possible.

  The specific components of the buffer member 88 are particularly limited as long as the collision of the horizontal pipe portion 27a of the outdoor gas refrigerant pipe 27 and the vertical pipe portion 81 of the branch pipe 80 with the side plate 14 of the unit casing 70 can be reduced. For example, a urethane foam processed product or the like may be used.

(7) Features (7-1)
In this embodiment, the branch pipe 80 having the service port 83 to which a pressure gauge or the like can be connected is a part of the outdoor gas refrigerant pipe 27 extending from the four-way switching valve 26 to the gas side end of the outdoor heat exchanger 28. It is provided to branch from. Therefore, during the cooling operation, it is possible to measure the pressure of the refrigerant discharged from the compressor 24 using the service port 83 and before passing through the outdoor heat exchanger 28. .

  The service port 83 flows through the outdoor gas refrigerant pipe 27 via a vertical pipe part 81 that branches from the upper wall of the horizontal pipe part 27 a of the outdoor gas refrigerant pipe 27 and extends upward in the vertical direction. The pressure of the refrigerant will act. For this reason, the pressure of the refrigerant discharged from the compressor 24 can be measured more accurately during the cooling operation.

  Further, when performing operations such as measurement of discharge pressure using the service port 83 and additional charging of the refrigerant, the service port 83 can be easily accessed through the electrical component access opening 74a provided in the side plate 14. It is not necessary to remove the entire side plate 74 of the unit casing 70. Therefore, the pressure of the refrigerant discharged from the compressor 24 before passing through the outdoor heat exchanger 28 can be accurately measured without removing the side plate 74 of the unit casing 70.

  In addition, since the electrical component access opening 74a, which is an opening for accessing the electrical component 7, is used as the opening for accessing the service port 83, it is not necessary to provide a separate opening for the service port 83. Is done.

(7-2)
In this embodiment, the outdoor gas refrigerant pipe 27 is arranged so as to be close to the side plate 74 and along the vicinity of the electrical component access opening 74a of the side plate 74, so that the branch necessary to reach the electrical component access opening 74a is reached. The overall length of the pipe 80 can be shortened.

  For this reason, even if pressure pulsation that may occur when the compressor 24 is driven to the branch pipe 80, the degree of vibration can be suppressed to a small level.

(7-3)
In the present embodiment, the buffer member 88 is interposed between the horizontal pipe portion 27 a of the outdoor gas refrigerant pipe 27 and the vertical pipe portion 81 of the branch pipe 80 and the inner side surface of the side plate 14 of the unit casing 70.

  For this reason, in order to shorten the overall length of the branch pipe 80, even if a part of the outdoor gas refrigerant pipe 27 is arranged near the side plate 74 along the side plate 74, the outdoor gas refrigerant pipe 27 and the side plate are arranged. The collision with 74 can be suppressed. Further, the vertical pipe portion 81 of the branch pipe 80 extending in the vertical direction from the horizontal pipe portion 27a of the outdoor gas refrigerant pipe 27 along the surface of the side plate 74 can also be prevented from colliding with the side plate 74. It has become.

  Further, even if pressure pulsation that may occur when the compressor 24 is driven acts on the horizontal pipe portion 27a of the outdoor gas refrigerant pipe 27 and the vertical pipe portion 81 of the branch pipe 80, the collision with the side plate 74 can be suppressed. It is possible. The same applies to transport vibration.

(7-4)
In the present embodiment, the service opening 83a of the service port 83 is open toward the outside of the electrical component access opening 74a and obliquely downward, and is open toward the electrical component 7 side. Absent. For this reason, even when refrigeration oil is scattered from the service opening 83a when working using the service port 83, the refrigeration oil is scattered toward the electrical component 7, as shown in FIG. Hateful. In other words, the service opening 83a is opened toward the outside of the electrical component access opening 74a, so that the refrigeration oil can be scattered in a direction away from the electrical component 7. In addition, since the service opening 83a opens obliquely downward, it is difficult for the refrigerating machine oil that has risen upward to fall on the electrical component 7 due to its own weight. For this reason, it is possible to suppress the refrigerating machine oil from adhering to the electrical component 7.

(8) Other Embodiments In the above embodiment, an example of the embodiment of the present invention has been described. However, the above embodiment is not intended to limit the present invention, and is not limited to the above embodiment. The present invention naturally includes aspects appropriately modified without departing from the spirit of the present invention.

(8-1) Other embodiment A
In the above-described embodiment, as shown in FIG. 8, an example in which the buffer member 88 is provided so as to surround the entire periphery of the horizontal pipe portion 27 a of the outdoor gas refrigerant pipe 27 and the vertical pipe portion 81 of the branch pipe 80. And explained.

  However, the present invention is not limited to this. For example, the buffer member 88 is provided between the horizontal pipe portion 27a of the outdoor gas refrigerant pipe 27 and the vertical pipe portion 81 of the branch pipe 80 and the side plate 14 of the unit casing 70. It may be provided only in.

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 7 Electrical component 10 Refrigerant circuit 20 Air-conditioning outdoor unit (outdoor unit)
24 Compressor 27 Outdoor gas refrigerant piping (high pressure gas piping)
27a Horizontal piping part (part extending in the horizontal direction)
28 Outdoor heat exchanger 31 Outdoor expansion valve 70 Unit casing 74 Side plate 74a Electrical component access opening 74b Cover 78 Partition plate 80 Branch piping 81 Vertical piping portion 82 Inclined piping portion 83 Service port 83a Service opening (opened portion)
83b Service cap 88 Buffer member 90 Air conditioning indoor unit (indoor unit)
S1 Blower room S2 Machine room

JP 2008-298344 A

Claims (4)

A fan room (S1) and a machine room (S2) are formed by dividing the internal space of the substantially rectangular parallelepiped casing (70) into left and right by the partition plate (78), and is connected to the indoor unit (90). An outdoor unit (20) constituting a refrigerant circuit (10) by
A compressor (24);
An outdoor heat exchanger (28);
A high-pressure gas pipe (27) connecting the discharge side of the compressor and one end of the outdoor heat exchanger;
A branch pipe (80) branched from the high-pressure gas pipe and having a service port (83) at the tip;
An electrical component (7) capable of controlling at least the drive of the compressor;
A side plate (74) having an electrical component access opening (74a) provided facing the electrical component so as to allow access to the electrical component, and constituting a side surface of the casing;
With
The service port of the branch pipe is disposed at a position accessible from the electrical component access opening, and is in a frame of the electrical component access opening and in front of the electrical component (7) in a side view. Located on the side,
The service port has a direction (83a) that is different from the direction on the electrical component (7) side and opens downward or obliquely downward.
Outdoor unit (20). The high-pressure gas pipe has a portion extending along the side plate so that the vicinity of the branch portion of the branch pipe is positioned in the vicinity of the electrical component access opening.
The outdoor unit (20) according to claim 1. A buffer member (88) interposed between the side plate and a portion extending along the side plate of the high-pressure gas pipe;
The outdoor unit (20) according to claim 2. The high-pressure gas pipe has a portion (27) a extending in the horizontal direction in the vicinity of the branch portion of the branch pipe,
The branch pipe has a vertical pipe portion (81) that branches and extends vertically upward from an upper wall of the portion (27a) in which the high-pressure gas pipe extends in the horizontal direction.
The outdoor unit (20) according to any one of claims 1 to 3.

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