JP2009168421A - Engine drive type heat pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate brazing work in a completed product assembling process in an engine drive type heat pump. <P>SOLUTION: The engine drive type heat pump 1 is provided with an equipment chamber 5 in which an engine 22 and refrigerant equipment such as compressors 20a, 20b are arranged; a heat exchange chamber 4 in which an outdoor heat exchanger 25 and an outdoor fan 26 are arranged; and a vertical partition wall 6 for partitioning a space between the lower equipment chamber 5 and the upper heat exchange chamber 4. A set of the refrigerant equipment including a four way valve 24 and a receiver 31 arranged in the equipment chamber 5 are in advance formed as one refrigerant equipment unit 50 before the completed product assembling process, and outdoor heat exchanger gas piping 45 for a gas refrigerant connection port of the outdoor heat exchanger 25 and the four way valve 24 and outdoor heat exchanger liquid piping 46 for a liquid refrigerant connection port of the outdoor heat exchanger 25 and the receiver 31 are interconnected by flanges in the vicinity of the vertical partition wall 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technology for constructing refrigerant equipment and piping arranged in an equipment room of an engine-driven heat pump.

  Conventionally, an equipment room in which refrigerant equipment such as an engine and a compressor, a four-way valve, and a receiver are arranged, a heat exchange room in which an outdoor heat exchanger is arranged above the equipment room, and an upper and lower partition that separates the equipment room from the heat exchange room Engine driven heat pumps with walls are known.

  The engine-driven heat pump requires a brazing operation between the refrigerant device and the piping in the finished product assembly process. This brazing work requires work time in a narrow work space, and the workability is poor. On the other hand, the package of the engine-driven heat pump is almost completed in the finished product assembly process. For this reason, the brazing work in the finished product assembling process needs to be performed in a narrow work place such as an equipment room, and the work efficiency is poor.

For example, in Patent Document 1, in order to improve assemblability, main components of a refrigerant circuit such as a compressor discharge pipe and an oil separator, a compressor suction pipe, a gas refrigerant connection pipe and a four-way valve of an outdoor heat exchanger, and a pipe around a receiver are disclosed. An engine-driven heat pump configured to be unitized in advance for each device is disclosed.
JP 11-337217 A

However, in the conventional configuration in Patent Document 1, it is necessary to perform the brazing operation for connecting the pipes between the units for each main device in the device room in which each unit is arranged, and the work efficiency is poor.
Therefore, the problem to be solved is to omit the brazing operation in the finished product assembly process in the engine-driven heat pump.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, in claim 1, an equipment room in which refrigerant equipment such as an engine and a compressor is arranged, a heat exchange room in which an outdoor heat exchanger and a fan are arranged, the lower equipment room, and the upper heat exchange In an engine-driven heat pump having an upper and lower partition wall that divides the chamber, a refrigerant device set including a four-way valve and a receiver arranged in the device chamber is set as one refrigerant device unit in advance before the finished product assembly step, The refrigerant connection pipe between the gas refrigerant connection port of the outdoor heat exchanger and the four-way valve and the refrigerant connection pipe between the liquid refrigerant connection port of the outdoor heat exchanger and the receiver are flanged in the vicinity of the upper and lower partition walls. is there.

  According to a second aspect of the present invention, in the engine-driven heat pump according to the first aspect, the refrigerant device unit and the compressor are flange-connected at the discharge port and the suction port of the compressor.

  As effects of the present invention, the following effects can be obtained.

  According to claim 1, a brazing operation for connecting piping between main devices of an engine-driven heat pump so that a set of refrigerant devices such as a compressor arranged in the device room is made into one unit in advance before the finished product assembly process. Can be omitted in the finished product assembly process. In addition, since the pipe connection with the outdoor heat exchanger arranged in the heat exchange chamber is also a flange connection, the brazing operation at this location can be omitted in the finished product assembly process.

  According to the second aspect of the present invention, since the connection with the compressor is also a flange connection, this brazing operation can be omitted in the finished product assembly process.

Next, embodiments of the invention will be described.
FIG. 1 is a configuration diagram showing a refrigerant circuit configuration of an engine-driven heat pump according to an embodiment of the present invention, FIG. 2 is a plan view showing a refrigerant piping unit, and FIG. 3 is a side view.

First, the refrigerant circuit configuration of the engine-driven heat pump 1 will be described with reference to FIG.
The refrigerant circuit of the engine-driven heat pump 1 is connected to the compressors 20a and 20b that obtain power from the engine 22 as a drive source via the clutch mechanism 21, and to the discharge side of the compressors 20a and 20b. A four-way valve 24 for switching the flow of refrigerant, an outdoor heat exchanger 25 to which discharged refrigerant is supplied from the compressors 20a and 20b via the four-way valve 24 during cooling, and an outdoor unit that exchanges heat between the outdoor heat exchanger 25 and outdoor air A fan 26, an indoor heat exchanger 29 to which discharged refrigerant is supplied from the compressors 20a and 20b via the four-way valve 24 during heating, an indoor fan 30 for exchanging heat between the indoor heat exchanger 29 and indoor air, and outdoor heat The outdoor heat exchanger expansion valve 27 is provided between the exchanger 25 and the indoor heat exchanger 29.

  The compressors 20a and 20b suck and compress gas refrigerant from the suction ports, and discharge high-temperature and high-pressure gas refrigerant. Moreover, the four-way valve 24 is connected to the compressor 20a * 20b through the discharge line 42 at the discharge port. The discharge line 42 is provided with an oil separator 23 for separating the refrigerating machine oil contained in the gas refrigerant and returning it to the suction side of the compressors 20a and 20b. That is, the gas refrigerant discharged from the compressors 20a and 20b flows into the four-way valve 24 through the oil separator 23 and is guided in a predetermined direction by the four-way valve 24. On the other hand, since the gas refrigerant sucked into the compressors 20 a and 20 b is also guided by the four-way valve 24, the refrigerant suction side of the compressors 20 a and 20 b and the four-way valve 24 are connected by a suction line 41. Further, the oil separator 23 is connected to the compressor 20 b and the suction line 41 via an oil return line 47.

  The four-way valve 24 is connected to the gas refrigerant connection port of the outdoor heat exchanger 25 via an outdoor heat exchanger gas pipe 45 as a refrigerant connection pipe on one end side, and the refrigerant connection is made to the liquid refrigerant connection port on the other end side. The receiver 31 is connected via the outdoor heat exchanger liquid piping 46 as piping. On the other hand, to the indoor heat exchanger 29, the receiver 31 is connected to one end side via the indoor heat exchanger expansion valve 28 and the internal / external connection pipe 48, and the four-way valve 24 is connected to the other end side via the internal / external connection pipe 49. Has been.

  The waste heat recovery unit 35 is provided in the waste heat recovery line 44. The waste heat recovery line 44 branches from between the receiver 31 and the outdoor heat exchanger expansion valve 27 and is connected to the suction line 41. The waste heat recovery expansion valve 34 is provided on the inlet side of the waste heat recovery unit 35 in the waste heat recovery line 44. The amount of refrigerant passing through the waste heat recovery line 44 is controlled by the waste heat recovery expansion valve 34, and the waste heat of the engine 22 is recovered from the engine coolant by the waste heat recovery unit 35 and evaporated.

  The supercooling heat exchanger 33 is disposed inside the receiver 31 and is provided along the supercooling line 43. The supercooling line 43 branches from between the receiver 31 and the outdoor heat exchanger expansion valve 27 and is connected to the suction line 41. The supercooling heat exchanger expansion valve 32 is provided on the inlet side of the supercooling heat exchanger 33 in the supercooling line 43. The refrigerant passing through the supercooling line 43 is controlled in its passage amount by the supercooling heat exchanger expansion valve 32, and the liquid refrigerant in the receiver 31 is supercooled by the supercooling heat exchanger 33 and evaporated.

  The engine-driven heat pump 1 includes an outdoor unit 2 and an indoor unit 3. Note that one indoor unit 3 is connected to the outdoor unit 2 in this embodiment, but a plurality of indoor units can be connected. The outdoor unit 2 includes an upper heat exchange chamber 4 and a lower equipment chamber 5. The upper heat exchange chamber 4 and the lower equipment chamber 5 are partitioned by an upper and lower partition wall 6. In the heat exchange chamber 4, an outdoor heat exchanger 25 and an outdoor fan 26 are arranged. On the other hand, in the equipment room 5, the engine 22, the compressors 20a and 20b, the clutch mechanism 21, the oil separator 23, the four-way valve 24, the waste heat recovery unit 35, the receiver 31, the outdoor heat exchanger expansion valve 27, the waste heat recovery. An expansion valve 34, a supercooling heat exchanger expansion valve 32, a solenoid valve, pipes connecting these, and sensors are arranged.

Here, the refrigerant device unit 50 will be described in detail with reference to FIGS. 1 to 3. In the refrigerant device unit 50, the direction in which the indoor unit connection flanges 51h and 51i face is defined as the back side.
As shown in FIG. 1, the refrigerant equipment unit 50 includes an oil separator 23, a four-way valve 24, a waste heat recovery unit 35, a receiver 31, an outdoor heat exchanger expansion valve 27, a waste heat recovery expansion valve 34, and other expansion valves. The supercooling heat exchanger expansion valve 32, the pipes connecting them, and a set of sensors are one unit assembled in advance before the finished product assembly process. Further, in FIG. 1, for convenience of illustration, the compressors 20 a and 20 b are shown as being provided with separate piping, but the compressors 20 a and 20 b are directly connected to the refrigerant device unit 50 by the connection flanges 51 a to 51 e. Connected.

  As shown in FIGS. 2 to 3, the refrigerant device unit 50 is configured by installing an oil separator 23 and a receiver 31 on a table 52. The oil separator 23 or the receiver 31 is provided with support materials 54 and 54. The support members 54 and 54 are provided with an outdoor heat exchanger expansion valve 27, a waste heat recovery expansion valve 34, a supercooling heat exchanger expansion valve 32, an electromagnetic valve, and piping connecting them.

  As shown in FIGS. 1 to 3, the refrigerant device unit 50 includes a compressor 20a / 20b and a flange 15e, a discharge flange 51c / 51d, and an oil return flange 51e provided to the compressor 20a / 20b. It is configured to be connected. In addition, all the flanges 51a-51e are set as the structure connected and fixed with a volt | bolt via a sealing material (not shown). The suction flange 51a is provided in the middle of the suction pipe 41a constituting the suction line 41 that returns to the suction port of the compressor 20a. The suction flange 51b is provided in the middle of the suction pipe 41b that constitutes the suction line 41 that returns to the suction port of the compressor 20b.

The discharge flange 51c is provided in the middle of the discharge piping 42a which comprises the discharge line 42 from the discharge port of the compressor 20a. Moreover, the discharge flange 51d is provided in the middle of the discharge piping 42b which comprises the discharge line 42 from the discharge outlet of the compressor 20b. The oil return flange 51e is provided in the middle of an oil return pipe 47b that constitutes an oil return line 47 that returns to the compressor 20b.
Here, the suction pipe 41a, the suction pipe 41b, the discharge pipe 42a, the discharge pipe 42b, and the oil return pipe 47b are extended to the side of the refrigerant device unit 50 and above the compressors 20a and 20b. That is, the suction flanges 51a and 51b, the discharge flanges 51c and 51d, and the oil return flange 51e are arranged on the side of the refrigerant device unit 50 and above the compressors 20a and 20b, which are positions that are easy to work in the flange connection work. Yes.

  The refrigerant device unit 50 is configured to be flange-connected to the indoor unit 3 by indoor unit connecting flanges 51h and 51i. The indoor unit connection flanges 51h and 51i are provided in the middle of the inner and outer connection pipes 48 and 49, respectively.

  The refrigerant device unit 50 is configured to be flange-connected to the outdoor heat exchanger 25 by the outdoor heat exchanger flanges 51f and 51g. The outdoor heat exchanger flanges 51f and 51g are provided in the outdoor heat exchanger gas pipe 45 and the outdoor heat exchanger liquid pipe 46, respectively. The outdoor heat exchanger gas pipe 45 and the outdoor heat exchanger liquid pipe 46 are extended above the refrigerant device unit 50. Further, the outdoor heat exchanger gas pipe 45 and the outdoor heat exchanger liquid pipe 46 penetrate the upper and lower partition walls 6 in the through hole 7. Here, the outdoor heat exchanger flanges 51f and 51g are arranged in the vicinity of the upper and lower partition walls 6 in the equipment room 5 (see FIG. 3).

  Thus, in order to make the plurality of refrigerant equipment sets arranged in the equipment room 5 into the refrigerant equipment unit 50 in advance before the finished product assembly process, the brazing operation for connecting the pipes between the main refrigerant equipments is performed in the finished product assembly process. Can be omitted. In addition, since the pipe connection of the outdoor heat exchanger 25 arranged in the heat exchange chamber 4 is also a flange connection by the outdoor heat exchanger flanges 51f and 51g, the brazing work at this location can be omitted in the finished product assembly process.

The block diagram which shows the refrigerant circuit structure of the engine drive type heat pump which concerns on the Example of this invention. The top view which similarly shows a refrigerant | coolant piping unit. Similarly side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine drive type heat pump 2 Outdoor unit 4 Heat exchange room 5 Equipment room 6 Upper and lower partition walls 20a and 20b Compressor 22 Engine 23 Oil separator 25 Outdoor heat exchanger 31 Receiver 45 Outdoor heat exchanger gas piping 46 Outdoor heat exchanger liquid Piping 50 Refrigerant equipment unit 51f / 51g Outdoor heat exchanger flange

Claims (2)

An equipment room in which refrigerant equipment such as an engine and a compressor is arranged;
A heat exchange chamber in which an outdoor heat exchanger and a fan are arranged;
Upper and lower partition walls that partition between the lower equipment chamber and the upper heat exchange chamber;
In an engine-driven heat pump having
A refrigerant equipment set including a four-way valve and a receiver arranged in the equipment room is set as one refrigerant equipment unit in advance before the finished product assembly process,
The refrigerant connection pipe between the gas refrigerant connection port of the outdoor heat exchanger and the four-way valve and the refrigerant connection pipe between the liquid refrigerant connection port of the outdoor heat exchanger and the receiver are flanged in the vicinity of the upper and lower partition walls. Features an engine-driven heat pump. The engine-driven heat pump according to claim 1,
An engine-driven heat pump characterized in that the refrigerant device unit and the compressor are flange-connected at a discharge port and a suction port of the compressor.

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