JP2011257103A - Packaged type engine-driven water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the layout of harnesses enhancing the noise resistance of a packaged type engine-driven water heater.SOLUTION: In the packaged type engine-driven water heater 1, a compressor is driven by an engine, a refrigerant/water heat exchanger is provided for exchanging heat between discharged refrigerant and supply water, a water/water heat exchanger is provided downstream of the refrigerant/water heat exchanger for exchanging heat between engine cooling water and the supply water, an evaporator 55 is provided for vaporizing the refrigerant through heat exchange with air, and the respective devices are contained in a package 11. The engine and the compressor are disposed in a package lower part 11a, and the evaporator 55 and a fan for the evaporator are disposed in a package upper part 11b. A terminal unit 23 is provided in the package upper part 11b, a control unit 3 is arranged in the package lower part 11a, and the electric power harness 21 and the signal harness 22 from the terminal unit 23 to the control unit 3 are separated vertically by a drain pan 12.

Description

  The present invention relates to a packaged engine-driven water heater.

  Conventionally, as an arrangement of a harness in a packaged engine-driven water heater, as disclosed in Patent Document 1, a harness provided so as to run along with a power supply harness and a signal harness is known.

JP-A-10-238823

  However, in the package-type engine-driven water heater described in Patent Document 1, the power system harness and the signal system harness run side by side near the ceiling at the bottom of the package, and noise may enter the signal system harness. In this case, there is a concern that a malfunction may occur without a correct signal being transmitted.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a harness layout with improved noise resistance of a packaged engine-driven water heater.

  A packaged engine-driven water heater of the present invention for solving the above-described problem is provided with a refrigerant-water heat exchanger that drives a compressor with an engine and performs heat exchange between discharged refrigerant and supply water, A water-water heat exchanger that exchanges heat between engine cooling water and supply water is provided downstream of the water heat exchanger, an evaporator that evaporates the refrigerant by heat exchange with air is provided, and each of the above devices is installed. A packaged engine-driven water heater with an engine and compressor located at the bottom of the package, the engine and compressor placed at the bottom of the package, and the interior of the package divided into upper and lower parts. The mouth is provided at the top of the package, the control unit is placed at the bottom of the package, and the power harness and signal harness from the intake to the control unit are packaged. It is intended to separate by partition walls below.

  Further, in the above-described packaged engine-driven water heater, a control unit is provided in which the vertical path of the power harness and the signal harness is separated to the left and right and the horizontal path is separated in the height direction.

  As described above, according to the first aspect of the present invention, the power harness and the signal harness can be physically separated, and the noise resistance of the signal harness is improved.

  In addition, according to the second aspect of the present invention, since the power harness and the signal harness in the control unit can be physically separated, the noise resistance of the signal harness is improved.

It is a front view which shows the outline of the whole structure in the state which removed the front cover of the package type engine drive water heater which concerns on this invention. It is a front view which shows the wiring state of the harness of the package type engine drive water heater which concerns on this invention. It is a perspective view which shows the wiring state of the harness of the package type engine drive water heater which concerns on this invention. It is a perspective view which shows the wiring state of the harness in the control unit of the package type engine drive water heater which concerns on this invention. It is a refrigerant circuit diagram which shows the outline of the whole structure of the heat pump cycle of the package type engine drive water heater which concerns on this invention.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an outline of the overall configuration of a packaged engine-driven water heater 1 according to the present invention, FIGS. 2 and 3 show the wiring state of a harness 2 of the packaged engine-driven water heater 1, and FIG. The wiring state of the harness 2 in the control unit 3 of the type engine drive water heater 1 is shown.

  That is, the packaged engine-driven water heater 1 is provided with a terminal box 23 serving as one end of the harness 2 in the upper portion 11b of the package 11, and the control unit 3 serving as the other end of the harness 2 in the lower portion 11a of the package 11. The power harness 21 and the signal harness 22 from the terminal box 23 to the control unit 3 are separated by a drain pan 12 that partitions the lower portion 11a and the upper portion 11b of the package 11.

  As shown in FIG. 5, first, the hot water supply circuit 4 of the packaged engine drive hot water heater 1 will be described. The hot water supply circuit 4 includes a main circuit 5 and a cooling water circuit 6.

  In the main circuit 5, the refrigerant compressed by the compressor 51 is condensed by the refrigerant-water heat exchanger 53 via the four-way valve 52, evaporated by the evaporator 55 via the expansion valve 54, and then again the four-way valve 52. It returns to the compressor 51 via and is comprised so that it may circulate.

  In the main circuit 5, a hot gas bypass path 5a is provided between the discharge side and the suction side of the compressor 51, and a discharge gas valve 56 is provided in the hot gas bypass path 5a. In addition, an injection path 5b is provided between the outlet side of the refrigerant-water heat exchanger 53 and the suction side of the compressor 51, and an injection valve 57 is provided in the injection path 5b.

  In the main circuit 5, the compressor 51 is driven by the engine 60. A belt 58 is provided between the engine 60 and the compressor 51, and a drive is transmitted from the engine 60 to the compressor 51 by a belt drive. This drive transmission is not particularly limited, such as a chain drive or a shaft drive.

  The cooling water circuit 6 passes through the cooling water path 60a in the engine 60, and after the cooling water recovered from the exhaust heat of the engine 60 dissipates heat to the supply water in the water-water heat exchanger 61, the cooling water circuit 6 again A cooling water pipe 63 is connected to pass through the engine 60 via 62 and circulate. Cooling water from the cooling water tank 65 is supplied to the cooling water pipe 63 via a cooling water supply pipe 64.

  The engine 60 adjusts the mixture of air and gas supplied from the air cleaner 66 with a fuel gas pressure control valve 67 and drives the engine 60 with this mixture. Exhaust from the engine 60 is exhausted through an exhaust silencer 68.

  In the hot water supply circuit 4, a supply water path 7 is formed so as to connect the refrigerant-water heat exchanger 53 and the water-water heat exchanger 61. In this supply water path 7, the supply water from the hot water storage tank 71 is heated through the refrigerant 72 through the refrigerant-water heat exchanger 53 and the water-water heat exchanger 61 and then collected in the hot water storage tank 71. Connected to be used.

  During normal operation, the refrigerant from the compressor 51 is supplied to the refrigerant-water heat exchanger 53 via the four-way valve 52, dissipates heat in the refrigerant-water heat exchanger 53, condenses, and passes through the expansion valve 54. After evaporating with the evaporator 55, it returns to the compressor 51 through the four-way valve 52 again, and the circulation is repeated.

  On the other hand, the water supplied from the hot water tank 71 is heated in the refrigerant-water heat exchanger 53 by heat radiation from the refrigerant, and then supplied to the water-water heat exchanger 61, and in the water-water heat exchanger 61. The exhaust heat of the engine 60 is further heated by the heat radiation from the cooling water, and then stored in the hot water storage tank 71.

  At this time, the control of the heating temperature of the hot water stored in the hot water tank 71 is performed by changing the number of revolutions of the compressor 51 by driving the engine 60.

  In the above operation, power is supplied to various devices such as the engine 60 constituting the hot water supply circuit 4 after the power introduced from the terminal box 23 is transformed by the transformer 24. The hot water supply circuit 4 controls the supply of power to these various devices and the control of the various devices by the control unit 3. The control of these various devices is controlled based on a control signal issued from the control unit 3.

  The package 11 is formed in a rectangular shape having a height of about 1800 mm, a depth of about 500 mm, and a width of about 950 mm by a frame 14 constructed on the base 13. Moreover, it is divided into the lower part 11a and the upper part 11b by the drain pan 12 arrange | positioned horizontally in the intermediate position of the height direction. In the package 11, the upper part 11 b of the back surface B does not use the frame 14, and the evaporator 55 also serves as a structural material. A fan 55 a that blows air to the evaporator 55 is provided in front of the evaporator 55 of the package 11. A decorative cover 15 is provided on the outer surface of the package 11 other than the evaporator 55 and the fan 55a.

  The upper portion 11b of the package 11 is provided with the evaporator 55 and the fan 55a described above, and in the remaining gap, the terminal box 23, the cooling water supply pipe 64, the cooling water tank 65, the air cleaner 66, the fuel gas pressure control valve 67, the exhaust gas. A silencer 68 and a transformer 24 are provided.

  In the lower part 11a of the package 11, an engine 60 and other devices other than those described above are accommodated.

  At this time, the control unit 3 is provided on one side surface R of the lower portion 11 a of the package 11. The fuel gas pressure control valve 67 is surrounded by a gas box 67 a and is provided on the other side face L of the upper portion 11 b of the package 11. The terminal box 23 is provided on the gas box 67a. The transformer 24 is provided at a position closer to one side surface R from the center of the upper portion 11b of the package 11 and surrounded by the transformer box 24a.

  The harness 2 includes a power harness 21 and a signal harness 22.

  The power harness 21 is configured to transform an external power source introduced from the terminal box 23 with a transformer 24 and connect it to the control unit 3 to supply power to each device from the transformer 24 or the control unit 3. . One end of the power harness 21 is connected to the terminal box 23 and is concentrated in a transformer box 24a provided near the one side surface R of the upper portion 11b of the package 11. The transformer box 24a The other end is connected to the control unit 3 of the lower portion 11a of the package 11 that passes through the insertion hole 12a provided near the one side surface R of the drain pan 12 from the insertion hole 24b provided in the drain pan 12. ing.

  The signal harness 22 communicates between the control buttons provided in the terminal box 23 and the control unit 3, and is configured so that each device can be controlled by operating the control unit 3 by turning the control buttons on and off. Yes. One end of the signal harness 22 is connected to the terminal box 23 and is integrated into a gas box 67a provided on the other side face L of the upper portion 11b of the package 11. An insertion provided in the gas box 67a is provided. The hole 67 b passes through the insertion hole 12 b provided in the drain pan 12, the back side of the drain pan 12 is wired along the front surface F side of the lower part 11 a of the package 11, and the other end is connected to the control unit 3. Has been made.

  Therefore, the harness 2 is separated from the power harness 21 and the signal harness 22 with the drain pan 12 interposed therebetween, so that resistance to noise is improved and malfunctions can be prevented.

  Moreover, in the control unit 3, as shown in FIG. 4, the power harness intake 31 is provided in the corner | angular part vicinity of the lower side D and one side S1. A signal harness intake 32 is provided on the upper side of the electric power harness intake 31. A power supply board 33 is provided at a position adjacent to the other side S <b> 2 from the power harness intake 31 and the signal harness intake 32. A main board 34 is provided on the power supply board 33, and a relay board 35 is provided on the main board 34.

  The power harness 21 introduced from the power harness intake 31 to the control unit 3 is wired along the lower side D of the control unit 3, the other side S 2, and the upper side U. The power supply harness 21 is wired from the power supply harness 21 provided along the lower side D or the other side S2 to the power supply board 33. The power harness 21 is wired from the power harness 21 provided along the other side S <b> 2 to the main board 34. The power supply harness 21 is wired from the power supply harness 21 provided along the other side S2 and the upper side U to the relay board 35.

  The signal harness 22 introduced into the control unit 3 from the signal harness inlet 32 is connected to one side S1 of the control unit 3, between the upper side of the power supply board 33 and the lower side of the main board 34, the upper side of the main board 34, and the relay. Wiring is provided between the lower side of the substrate 35. The signal harness 22 is wired from the signal harness 22 provided between the upper side of the power board 33 and the lower side of the main board 34 to the power board 33. The signal harness 22 is connected to the main board 34 along one side S1, between the upper side of the power supply board 33 and the lower side of the main board 34, and between the upper side of the main board 34 and the lower side of the relay board 35. It is wired from the provided signal harness 22. The signal harness 22 is wired from the signal harness 22 provided along the upper side of the main board 34 and the lower side of the relay board 35 to the relay board 35.

  Thereby, since the control unit 3 can physically separate the power harness 21 and the signal harness 22, the noise resistance of the signal harness 22 is improved.

  In the present embodiment, as shown in FIG. 3, the power harness 21 and the signal harness 22 are separated from each other. However, the power board 33, the main board 34, and the relay board 35 are sandwiched between the upper and lower sides or one side. As long as it is separated from S1 and the other side S2, this separated shape is not particularly limited, and is determined as appropriate according to the configuration of the substrate of the control unit 3.

  In the present embodiment, the harness 2 separates the power harness 21 and the signal harness 22 from above and below the drain pan 12, and also separates the power harness 21 and the signal harness 22 from the control unit 3. However, in the control unit 3, the power supply base 33, the main board 34, and the relay board 35 are separated as described above, and the power harness 21 and the signal harness 22 may be easily separated. Therefore, the package 11 may be configured to separate the power harness 21 and the signal harness 22 above and below the drain pan 12.

  INDUSTRIAL APPLICABILITY The present invention can be used as various packaged engine-driven water heaters used in air conditioners and cogeneration systems.

DESCRIPTION OF SYMBOLS 1 Package type engine drive water heater 11 Package 11a Package lower part 11b Package upper part 12 Drain pan (partition wall)
2 Harness 21 Power Harness 22 Signal Harness 23 Terminal Unit 3 Control Unit 51 Compressor 53 Refrigerant-Water Heat Exchanger 55 Evaporator 55a Evaporator Fan 60 Engine 61 Water-Water Heat Exchanger

Claims (2)

A refrigerant-water heat exchanger that drives the compressor with the engine and exchanges heat between the discharged refrigerant and the supply water is provided, and heat is provided between the engine cooling water and the supply water downstream of the refrigerant-water heat exchanger. A water-water heat exchanger for exchange is provided, an evaporator for evaporating the refrigerant by heat exchange with air is provided, the respective devices are housed in a package, and the interior of the package is partitioned into upper and lower parts to In a package-type engine-driven water heater that is placed at the bottom of the package and the evaporator and evaporator fan are placed at the top of the package,
A package type characterized in that the power harness and signal harness intake are provided at the top of the package, the control unit is arranged at the bottom of the package, and the power harness and signal harness from the intake to the control unit are separated by the upper and lower partition walls Engine-driven water heater.   2. The package-type engine-driven water heater according to claim 1, further comprising a control unit that separates the vertical path of the power harness and the signal harness into left and right and separates the horizontal path in the height direction. Type engine-driven water heater.

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