JP5454327B2 - Heat pump heat source machine - Google Patents

Description

  The present invention relates to a heat pump heat source machine.

  Conventionally, this type of heat pump heat source machine aims to improve the soundproof performance during operation of the heat pump heat source machine by reliably positioning and fixing the radiator (so-called water-refrigerant heat exchanger) in the heat pump heat source machine. In order to increase the strength against the external force applied during transportation of the heat pump heat source machine, the radiator heat insulating material covering the radiator (water-refrigerant heat exchanger) is fitted on the bottom plate having an uneven shape, and this heat dissipation A heat exchange cover is provided so as to cover the heat insulation from above the heat insulator, and the heat exchange cover is engaged with a partition plate separating the compressor and the radiator (water-refrigerant heat exchanger). In addition, the front of the heat exchanger cover is sandwiched and fixed between the bottom plate and the exterior front plate, so that the positioning of the radiator (water-refrigerant heat exchanger) during assembly becomes clear and workability is improved. That can be planned Some (for example, Patent Document 1).

  7 and 8 show a conventional heat pump heat source device described in Patent Document 1, FIG. 7 is a front interior perspective view, and FIG.

  As shown in FIG. 8, the heat pump heat source apparatus 101 includes a refrigerant circuit that is a closed circuit by sequentially connecting a compressor, a radiator, a decompression unit, and an evaporator in a ring shape. An air-refrigerant heat exchanger 103, which is an evaporator formed by bending in an L shape, is arranged, and a water-refrigerant heat exchanger 104, which is a radiator, is disposed in front of the air-refrigerant heat exchanger 103, on the bottom plate 102. It is arranged.

  Reference numeral 105 denotes a compressor, which is provided with a pressure reducing means including an expansion valve (not shown) in the vicinity thereof. Reference numeral 106 denotes a heat insulating material provided so as to cover the radiator (water-refrigerant heat exchanger) 104, and the heat insulating material 106 is configured to fit into the uneven shape 102 a of the bottom plate 102. Reference numeral 107 denotes a heat exchange cover provided to cover the heat insulating material 106 from above.

  Reference numeral 108 denotes a blower fan for increasing the heat exchange capability of the air-refrigerant heat exchanger 103, which is disposed in front of the air-refrigerant heat exchanger 103 and above the heat exchanger cover 107. Reference numeral 109 denotes a partition plate that partitions the compressor 105, the decompression device, the air-refrigerant heat exchanger 103, and the radiator (water-refrigerant heat exchanger) 104.

  And the nail | claw part 109a is provided in the partition plate 109, The positioning of the heat exchanger cover 107 is made | formed by the nail | claw part 109a and the U-shaped cut part 107a of the heat exchanger cover 107 engaging. . Reference numeral 110 denotes an exterior front plate, which is fastened with a bottom plate 102 and screws 111, and is arranged from the outside in the order of the exterior front plate 110 to the heat exchange cover 107 to the bottom plate 102.

With the above configuration, the soundproof performance during operation of the heat pump heat source unit 101 is improved, the strength against external force applied during transportation of the heat pump heat source unit 101 is increased, and the radiator (water-refrigerant heat exchanger) 104 is positioned during assembly. It is written that it becomes clear and the workability can be improved.

Japanese Patent No. 3931878

  However, in the conventional configuration, the position of the heat exchange cover 107 is positioned by fitting the claw portion 109a with the partition plate 109. However, the radiator (water-refrigerant heat exchanger) 104 arranged inside the heat exchange cover is made of copper having a high thermal conductivity, and in order to increase the pressure resistance by flowing a high-pressure refrigerant, A thick hot copper pipe is used, and the length of the copper pipe is very long and the mass is large in order to exchange heat with water.

  Further, the radiator (water-refrigerant heat exchanger) 104 is brazed with a pipe for connecting to a tank unit (not shown here) that stores tap water heated by a heat pump heat source machine. The position is biased by the length of the pipe.

  Therefore, as described in the prior art, there may be an aspect that the positioning of the radiator (water-refrigerant heat exchanger) 104 at the time of assembly becomes clear and the workability can be improved, but the effect is It wasn't perfect and there was an inadequate aspect.

  In particular, after touching the heat pump heat source device 101 that has been put on the market once for maintenance, if the exterior front plate is to be attached, when the exterior front plate 110 to the heat exchange cover 107 to the bottom plate 102 are to be tightened, the heat exchange cover In some cases, the positions of the holes 107 did not match and it was difficult to tighten with the screws 111.

  This is because the heat exchange cover 107 is stressed due to impact during transportation or vibration during use, and once removed for maintenance, the urged shape is released and its position changes. This is because the screw mounting hole is displaced during reassembly.

  Therefore, as a countermeasure, it is possible to improve the assemblability by increasing the screw mounting hole 107b of the heat exchange cover. Since the heat exchange cover 107 is sandwiched between the exterior front plate 110 and the bottom plate 102, if the screw mounting hole 107b of the heat exchange cover is sufficiently larger than the outer diameter of the screw 111, the assemblability is good. be able to. However, this means that there is a play difference between the screw mounting hole 107b of the heat exchanger cover 107 and the screw outer diameter.

  Therefore, there is a possibility that the position of the blower fan 108 held in the heat exchange cover 107 is shifted. As for the upper and lower sides, as described in the prior art, the blower fan 108 has a top plate that covers the top surface of the heat pump heat source device 101 via the upper part of the air-refrigerant heat exchanger 103 and the buffer member. The position is urged because of being pressed and fixed by, but there is a deviation with respect to the left and right.

This misalignment makes the distance between the openings provided in the blower fan 108 and the exterior front plate 110 uneven, and may cause a reduction in the air volume and the generation of abnormal sounds such as wind noise during blowing. Therefore, in the blower fan 108, a so-called nZ sound (abnormal noise frequency is indicated by n: fan rotation speed (r / m), Z: number of honey (sheets), nZ / 60 [ Hz] is generated every time a multiple of [Hz], and is generated due to periodic pressure fluctuations caused by the flow related to the blower fan, and is not silent.

  In particular, in the case of the heat pump heat source apparatus 101, since it operates at midnight to store hot water, it is often operated in a quiet state, and even a slight abnormal sound may cause a problem.

  This invention solves the said conventional subject, and it aims at providing the heat pump heat source machine which implement | achieved the noise reduction by the improvement of assembly property, the improvement of maintainability, and stabilization of ventilation performance.

In order to solve the conventional problems, a heat pump heat source apparatus according to the present invention includes a refrigerant circuit formed by connecting a compressor, a water-refrigerant heat exchanger, a decompression unit, and an evaporator, and the water-refrigerant heat exchanger. Comprises a heat insulating material disposed inside, a heat exchange cover disposed outside the heat insulating material, a blower fan that allows air to pass through the evaporator, and an exterior, and is blown by the blower fan. a front plate for passing the air, constitutes the exterior, a bottom plate at least the compressor is mounted, the inside of the exterior, at least the water - is a refrigerant heat exchanger and the blower fan is disposed A partition plate that is separated into a portion and at least a portion where the compressor and the pressure reducing means are disposed, and the bottom plate has a frame portion formed by bending an end portion upward, heat exchange cover is sandwiched between the front plate and the front Symbol frame portion And a right vertical upper part fixed to the partition plate, and a right vertical lower part provided below the right vertical upper part and fixed to the frame part. The right vertical lower portion is provided with a mounting hole for fastening and fixing from the front plate side, and the right vertical lower portion is located on the inner side of the exterior with respect to the frame portion. In the engaged state, the frame portion is fastened and fixed .

  According to this, a thick copper pipe is used to increase the pressure resistance by flowing a high-pressure refrigerant, which is made of copper with high thermal conductivity arranged inside the heat exchange cover, Furthermore, in order to exchange heat with water, the length of the copper pipe is also very long, and the heat exchanger (water-refrigerant heat exchanger) having a large mass can be energized by the heat exchange cover. The position of the cover will be determined.

  Therefore, when attaching the exterior front plate at the time of assembly or maintenance in the market, the workability is greatly improved by determining the position of the heat exchange cover when attaching to the exterior side plate, heat exchange cover, and bottom plate. .

  In addition, the heat exchange cover is fixed at the part that is fastened to the bottom plate in advance, and held between the exterior front plate and the bottom plate, both of which are held by fixing from the front, It is easy to attach and detach, and by removing this heat exchange cover, it is possible to remove the contents of the radiator from the front if the brazing part is removed, improving the maintainability.

  ADVANTAGE OF THE INVENTION According to this invention, the heat pump heat source machine which implement | achieved the noise reduction by the improvement of assembly property, the improvement of maintainability, and stabilization of ventilation performance can be provided.

Interior perspective view of a heat pump heat source machine in Embodiment 1 of the present invention Top view and front view of the heat pump heat source machine Circuit diagram of the heat pump heat source machine Inside perspective view of the heat pump heat source machine Perspective view of the main part of the heat pump heat source machine Cross section of the main part of the heat pump heat source machine Internal perspective view of a conventional heat pump heat source machine Cross section of the main part of the heat pump heat source machine

The first invention is a refrigerant circuit formed by connecting a compressor, a water-refrigerant heat exchanger, a decompression means, an evaporator, a heat insulating material in which the water-refrigerant heat exchanger is disposed inward, A heat exchanger cover disposed outside the heat insulating material, a blower fan that allows the air to pass through the evaporator, a front plate that constitutes an exterior and allows the air blown by the blower fan to pass through , and the exterior At least the bottom plate on which the compressor is placed, and the interior of the exterior, at least the portion where the water-refrigerant heat exchanger and the blower fan are disposed, and at least the compressor and the pressure reducing means are arranged. comprising a partition plate isolating the aND SETUP is the portion, wherein the bottom plate includes a frame portion ends are formed by bending upward, the heat exchange cover, the front plate and the front Symbol frame a front wall portion sandwiched between the parts, and the right vertical upper fixed to the partition plate, before A right vertical lower portion provided below the right vertical upper portion and fixed to the frame portion, and fastened and fixed to the front of the wall portion, the right vertical upper portion, and the right vertical lower portion from the front plate side. The right vertical lower portion is fastened and fixed to the frame portion in a state of being meshed with the frame portion so as to be located on the inner side of the exterior from the frame portion. This is a heat pump heat source machine.

  According to this, a thick copper pipe is used to increase the pressure resistance by flowing a high-pressure refrigerant, which is made of copper with high thermal conductivity arranged inside the heat exchange cover, Furthermore, in order to exchange heat with water, the length of the copper pipe is also very long, and the heat exchanger (water-refrigerant heat exchanger) having a large mass can be energized by the heat exchange cover. The position of the cover will be determined.

  Therefore, when attaching the exterior front plate at the time of assembly or maintenance in the market, the workability is greatly improved by determining the position of the heat exchange cover when attaching to the exterior side plate, heat exchange cover, and bottom plate. .

  In addition, the heat exchange cover is fixed at the part that is fastened to the bottom plate in advance, and held between the exterior front plate and the bottom plate, both of which are held by fixing from the front, It is easy to attach and detach, and by removing this heat exchange cover, it is possible to remove the contents of the radiator from the front if the brazing part is removed, improving the maintainability.

In addition, the partition plate and the heat exchange cover are fixed with fastening screws, and the bottom plate, the heat exchange cover, and the partition plate are vertically connected to improve the strength of the partition plate, and thus the heat pump heat source machine body. it can.

The heat exchange cover is fixed by a fastening screw sandwiched between the front plate and the frame portion of the bottom plate, and the diameter of the screw mounting hole of the heat exchange cover is determined by the screw of the frame portion of the front plate. same diameter as the diameter of the use mounting holes, or may be characterized in that it a smaller diameter. According to this, the heat exchange cover is urged to the exterior front plate, and the position is determined. The exterior front plate is provided with an aperture-shaped bell mouth for the purpose of increasing the air flow of the blower fan and reducing noise, but the positional relationship between this bell mouth and the blower fan provided on the heat exchanger cover is It will be fixed.

  Therefore, the stability of the air blowing performance can be achieved, there is no difference between devices, heat pump heat source equipment that can stably produce performance can be mass-produced, and the occurrence of abnormal noise caused by the positional relationship between the air blowing fan and the bell mouth can be prevented. It can be set as a quiet heat pump heat source machine.

The second invention has an attachment hole for fastening and fixing from the front plate side, and
A first concave portion that is recessed inwardly is provided, and the front of the wall portion is inserted into the first concave portion.

  According to this, the heat exchange cover can be easily attached and detached by holding the part to be fastened with the bottom plate in advance from the front, and by removing the heat exchange cover, the radiator is also brazed. If the part is removed, it is possible to remove it from the front surface, and the maintainability is improved.

  At that time, by fixing to the recess, it is possible to provide a heat pump heat source machine having high strength that does not interfere with the exterior front plate and does not cause abnormalities such as dents.

According to a third aspect of the present invention, the frame portion has a mounting hole for fastening and fixing from the front plate side, and a second recess recessed inward of the exterior is provided. It is configured to be fastened and fixed to the second recess while being engaged with the second recess so as to be located on the inner side of the exterior from the second recess. is there.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front internal perspective view and main part perspective view of a heat pump heat source apparatus according to a first embodiment of the present invention, FIG. 2 is a top internal view and front internal view of the heat pump heat source apparatus, and FIG. 3 is the heat pump heat source. Fig. 4 is a front view and main part perspective view explaining the assembly method of the heat pump heat source machine, Fig. 5 is a main part enlarged perspective view of Fig. 4, and Fig. 6 is a top view and main part enlarged of the bottom plate. FIG.

  First, in FIGS. 1 to 3, 1 is a heat pump heat source device for heating tap water, 2 is heated hot water connected by the heat pump heat source device 1 and the pipe 3, and the stored hot water and tap water are stored. It is a tank unit for mixing and supplying hot water of a predetermined temperature.

  As shown in the piping circuit diagram of FIG. 3, the heat pump heat source unit 1 includes a compressor 4, a radiator (water-refrigerant heat exchanger) 5 composed of a copper pipe having a high thermal conductivity as a radiator, There are an expansion valve 6 that is a decompression means, an air-refrigerant heat exchanger 7 that is an evaporator, a compressor 4, a radiator (water-refrigerant heat exchanger) 5, a decompression means 6, and an air-refrigerant heat exchanger 7. A refrigerant circuit 8 that circulates the refrigerant is configured by sequentially connecting in a ring to form a closed circuit. Reference numeral 9 denotes a blower fan that conveys air to the air-refrigerant heat exchanger 7 that is an evaporator, and promotes the heat exchange capability of the air-refrigerant heat exchanger 7.

  On the other hand, the hot water supply cycle 10 constituting the tank unit 2 is a water-refrigerant heat exchanger 11 (for example, having a thermal conductivity) that exchanges heat with the radiator 5 in the heat pump heat source unit 1 to convert tap water into warm water. A heat exchanger having a double pipe structure made of high copper and integrated with the radiator 5), a hot water storage tank 12 for storing hot water obtained by the water-refrigerant heat exchanger 11, a hot water storage tank 12 and water A water inlet pipe 13 for introducing tap water into the refrigerant heat exchanger 11, a hot water storage tank 12, a hot water supply pipe 15 for supplying hot water from the water-refrigerant heat exchanger 11 to a faucet or shower hot water supply terminal 14, and the hot water storage tank 12. The hot water circulating water pump 16 that feeds the low-temperature water to the water-refrigerant heat exchanger 9 is used.

  The heat pump heat source machine in which the components shown in FIG. 3 are laid out is shown in FIGS. 1 and 2, which will be described with reference to FIG.

  The compressor 4 is placed on the bottom plate 17. As shown in FIG. 6, the bottom plate 17 has a substantially rectangular shape when viewed from the top, and is formed in a box shape by forming a frame portion 17 a that is bent upward at four end portions of the bottom plate 17. The part has irregularities to ensure strength.

  The front frame portion 17b is provided with two inward recesses, which are a substantially central recess 17c and a substantially rightward recess 17d. The substantially rightward recess 17d has a larger recess size than the substantially central recess 17c. It is formed.

  The radiator 5 (water-refrigerant heat exchanger 11) is a heat exchanger having a double-pipe structure in which a refrigerant pipe is arranged inward and a water pipe is arranged outward, and is configured in a spiral shape so as to be compact. It is placed on the bottom plate 17. Reference numeral 5a denotes a return and return refrigerant pipe of the radiator 5 (water-refrigerant heat exchanger 11), which is connected to the refrigerant circuit. Reference numeral 5b denotes a forward and return water pipe, which is connected to the pipe 3 so as to be connected to the tank unit. The forward and return refrigerant pipes 5 a and the forward and return water pipes 5 b pass through the front of the compressor 4.

  Reference numeral 18 denotes a heat insulator made of foamed polystyrene in order to enhance the heat insulating property of the heat radiator 5 (water-refrigerant heat exchanger 11), and heat is dissipated between the heat radiator upper 18a and the heat radiator lower 18b. The radiator 5 (water-refrigerant heat exchanger 11) is sandwiched, and the radiator heat insulator lower 18 b is placed on the bottom plate 17 so as to engage with the uneven portion of the flat portion of the bottom plate 17. Yes.

  Reference numeral 19 denotes a heat exchange cover arranged outside the radiator heat insulating material 18, which is made of a sheet metal and covers the front, rear, left and right upper surfaces of the heat radiator insulating material upper 18 a and the lower 18 b. The front wall portion 19a of the heat exchanger cover 19 is configured to be inserted into the substantially central recess 17c of the bottom plate 17, and the lateral width of the wall portion 19a is narrower than the width of the substantially central recess 17c of the bottom plate 17. It has become.

  The depth of the substantially central recess 17c of the bottom plate 17 is equal to or several millimeters deeper than the thickness of the heat exchanger cover 18, and the heat exchanger cover 19 The front 19a of the wall is the same surface or is shaped so that the front 19a of the heat exchange cover 19 is slightly recessed from the same surface.

  A plurality of holes 19b are provided in the front wall 19a of the heat exchanger cover 19, and the screw holes 17e provided in the front frame 17b of the bottom plate 17 are aligned with the holes 19b. Yes.

  Further, a right vertical lower portion 19 c is provided at the lower right of the heat exchange cover 19, and is engaged with the right vertical lower portion 19 c and the substantially right-side concave portion 17 d of the bottom plate 17. Thus, the heat exchange cover 18 and the bottom plate 17 can be fastened.

  At that time, the depth of the substantially right-side recess 17d of the bottom plate 17 is longer than the height of the screw head of the fastening screw 31 to be attached. A right vertical portion upper portion 19 d is provided above the right vertical lower portion 19 c of the heat exchange cover 19.

  Reference numeral 7 denotes an air-refrigerant heat exchanger as an evaporator, which is bent in an L shape in the top view and is placed on the bottom plate 17. The air-refrigerant heat exchanger 7 is constituted by a heat collection heat exchanger formed by penetrating a plurality of fins 7a through a plurality of pipes 7b.

  Reference numeral 9 denotes a blower fan disposed inward of the air-refrigerant heat exchanger 7 and above the heat exchanger cover 19, and forcibly passes air through the air-refrigerant heat exchanger 7 to heat the air and the refrigerant. Promote exchange.

  Reference numeral 20 denotes a blower motor that drives the blower fan 9, 21 denotes a motor base that holds the blower motor 20, and the motor base 21 includes a radiator heat insulator upper 18 a provided on the upper surface of the heat exchange cover 19 and a heat exchange cover. It is mounted on a stepped portion 19e that is stepped so as to provide a clearance 19 and is fixed with screws.

  Reference numeral 22 denotes a partition plate for isolating the parts of the blower fan 8 and the radiator (water-refrigerant heat exchanger) 5 from the compressor 4 and the part of the expansion valve 6 which is a decompression means. The partition plate 22 is placed on the bottom plate 17 and is fastened from the front by a right vertical upper portion 19d of the heat exchanger cover 19 at the center thereof. The forward and return refrigerant pipes 5a and the forward and return water pipes 5b of the radiator 5 (water-refrigerant heat exchanger 11) are both below the fastening portion of the partition plate 22 and the right vertical upper portion 18d of the heat exchanger cover 18. Through the back of the right vertical lower portion 18c of the heat exchanger cover 18.

  Reference numerals 23 and 24 are a pipe connection tool for connecting the pipe 3 to the return and return water pipe 5b of the radiator 5 (water-refrigerant heat exchanger 11), and a pipe connection tool return. 2 is connected.

  25 is an exterior covering the outline of the heat pump heat source machine 1, 26 is an exterior side plate right for covering from the right side, 27 is an exterior side plate left for covering from the left side, and 28 is an exterior front plate for covering from the front. . The exterior front plate 28 is provided with a blowout grill 29 for allowing the wind from the blower fan 9 to pass therethrough.

  The exterior front plate 28 facing the blowout grill 29 has a bell mouth 28a concentrically provided with the blower fan of the exterior front plate 28 in order to improve the blowing performance. It is set as the shape which curves in a semicircle shape toward the radial direction outward from the inner peripheral surface provided in this. The exterior front plate 28 is provided with a plurality of front plate screw mounting holes for screwing to the bottom plate 17 via the heat exchange cover 18. Reference numeral 30 denotes an exterior upper plate for covering the upper side.

  Further, the motor base 21 is sandwiched between the heat exchange cover 18 and the exterior top plate 27 and is energized so that vertical positioning is performed. Further, the refrigerant used in the refrigerant circuit 8 of the heat pump heat source machine is carbon dioxide.

  Hereinafter, the operation of the heat pump heat source apparatus will be described based on the drawings.

  When the compressor 4 is operated, the carbon dioxide gas, which is the refrigerant compressed and discharged to a high pressure, is sent to the radiator 5 (water-refrigerant heat exchanger 11), and the hot water supply circulating water pump 16 is provided below the hot water storage tank 12. The heat is exchanged with the low-temperature water that has passed through the connection pipe 3 by the power of

  Thereby, the heated low temperature water turns into high temperature water, is sent to the hot water storage tank 12, and is stored as hot hot water. The refrigerant flowing out of the radiator 5 (water-refrigerant heat exchanger 11) is decompressed and expanded by the expansion valve 6 which is a decompression means, sent to the air-refrigerant heat exchanger 7, and sent by the blower fan 9. It exchanges heat with air and evaporates and gasifies while passing through the air-refrigerant heat exchanger 7.

  This gasified refrigerant is again sucked into the compressor 4 and compressed again, and the low-temperature water is gradually heated. The hot water that has been heated and stored in the hot water storage tank 12 is mixed with the low-temperature water that has passed through the inlet pipe 13, becomes hot water of a predetermined temperature, passes through the hot water supply pipe 15, and is supplied from the hot water supply terminal 14 of the faucet or shower. By doing so, it operates as a water heater.

  At this time, the water-refrigerant heat exchanger, which is a radiator, has a function of heating the water sent from the tank unit by the heat pump type refrigeration cycle 8 to warm the water. Then, the warm water is returned to the tank unit 8 and stored in the tank 8 at a high temperature.

Therefore, the water-refrigerant heat exchanger, which is a radiator, is made of copper having high thermal conductivity, and is a double pipe in which a copper pipe for flowing a refrigerant is incorporated inside a copper pipe for flowing water. In particular, carbon dioxide gas is used as a refrigerant these days, and its pressure is three times that of the refrigerant (R-410A) used in air conditioners, and the maximum pressure is 12 MPa. The wall thickness is increased.

  Furthermore, in order to perform heat exchange, the length is also made spiral by making it spiral, but it is very long as 10 m or more. Therefore, the mass of the radiator (water-refrigerant heat exchanger) is very heavy.

  When the heat pump heat source unit 1 is assembled, the drawings in the middle of the assembly are shown in FIGS. 4 and 5, and will be described with reference to FIGS. A compressor and an air-refrigerant heat exchanger are placed on the right side of the bottom plate, and components such as a refrigerant circuit pipe and an expansion valve connected to the compressor and the air-refrigerant heat exchanger are connected.

  Next, in the left direction of the bottom plate, a radiator heat insulator lower 18b is placed on the bottom plate 17, and the radiator 5 (water-refrigerant heat exchanger 11) is placed inside the radiator heat insulator lower 18b. Then, the upper 5a and the lower 5b of the radiator 5 (water-refrigerant heat exchanger 11) and the lower and upper portions of the pipe connecting portion are brazed. Next, it covers with the radiator heat insulator top 18a.

  After that, the heat exchanger cover 19 is placed so as to cover the upper and lower heat insulators 18a and 18b. The heat exchange cover is arranged on the front surface of the bottom plate 17 so that the front wall portion 19 a of the heat exchange cover is aligned with the substantially central recess 17 c on the front surface of the bottom plate 17. At this time, the depth of the substantially central recess 17 c is a recess slightly deeper than the thickness of the heat exchanger cover 19.

  The right vertical lower portion 19c of the heat exchange cover 19 is meshed with the substantially right-side concave portion 17d of the bottom plate 17 to urge the position of the radiator 5 (water-refrigerant heat exchanger 11), and the fastening screw 31. Then, fix with screws. As a result, the position of the heat exchange cover 19 is restricted, and the screw mounting hole 19b of the heat exchange cover 19 and the position of the tightening hole 17e of the bottom plate 17 coincide with each other.

  The next partition plate 22 and the right vertical upper portion 19 d of the heat exchange cover 19 are fixed by a fastening screw 32. Thereby, the bottom plate 17, the heat exchanger cover 19, and the partition plate 22 are vertically connected, so that the strength of the partition plate 22, and consequently the heat pump heat source unit 1 body can be improved.

  Next, the motor base 21 to which the blower fan 9 and the blower motor 20 are attached in advance is placed on the stepped portion 19e on the heat exchanger cover 19. The stepped portion is provided by the blower fan 9 which cools the radiator heat insulator top 18a in the heat exchanger cover 19 with the air sent, and consequently the radiator 5 (water-refrigerant heat) inside the heat exchanger cover 19. This is because a certain space is provided between the radiator heat insulator top 18a and the heat exchanger cover 19 in order to prevent the exchanger 11) from being cooled and the efficiency from decreasing.

  Thereafter, the exterior 25 is assembled with the exterior side plate right 26, the exterior side plate left 27, the exterior front plate 28, and the exterior top plate 30. When assembling the exterior front plate 28, the blow-out grill 29 is attached to the exterior front plate 28 having the bell mouth 28a, and the exterior front plate fastening screw 33 is inserted into the exterior front plate screw mounting hole 32b. The exchange cover 29 and the bottom plate 17 are fastened together.

  The bell mouth 28a improves the air blowing performance of the air blowing fan 9, and reduces air blowing noise by mitigating air collision at the suction side wall portion of the exterior front plate 28 and suppressing air separation. High air blowing performance is obtained.

  For this reason, the roundness of the blower fan 9 and the bell mouth 28a is important, and if this roundness is lost, an abnormal sound is generated. When the exterior top plate 30 is attached, the motor base 21 is energized and the heat exchange cover 19 is pushed downward, whereby the vertical position is determined.

  On the other hand, the screw mounting hole diameter 19e of the heat exchanger cover 19 is the same as the screw mounting hole diameter 28b provided on the exterior front plate 28 or the screw attachment hole 28b provided on the exterior front plate 28. With the small hole diameter, the heat exchanger cover 19 is urged by the exterior front plate 28, and the lateral position is also determined.

  This means that the position of the blower fan 9 attached to the heat exchange cover 19 and the roundness of the bell mouth 28a of the exterior front plate 28 match exactly.

  As a result, the nZ sound generated by the deviation of the roundness (the sound generated by the rotational speed of the blower fan 9 and the number of the honey, the abnormal sound frequency is n: fan rotational speed (r / m), Z: the number of honey (sheets) ), Which occurs for each multiple of nZ / 60 [Hz], which can be suppressed. Such a heat pump heat source unit 1 operates as a nighttime heat storage device at night to heat tap water and stores hot water in the tank unit 2, but it is very important to be able to reduce the operation sound at night.

  For example, if the rotational speed of the blower fan 9 is set to 600 rpm and the number of the splashes is two, an abnormal sound is produced at a multiple of 20 Hz, and the multiple is a sound that is anxious up to 5 or 6 times. In general, the audible frequency of a person is said to be 20 Hz to 15000 Hz to 20,000 Hz, but it is 120 Hz even if it is 6 times, which is a low frequency in that range. Such a low frequency is difficult to attenuate even if a soundproofing material is put in the house and will be heard indoors. It is very important as a product to reduce this sound at midnight.

Further, the depth of the substantially right-side concave portion 17d of the bottom plate 17 fastened to the right vertical lower portion 19c of the heat exchanger cover 19 is longer than the height of the head of the screw 31 to be attached, and thus comes to the front. It does not interfere with the exterior front plate 28 and prevents defects such as dents during conveyance.
Further, the front wall 19a of the heat exchanger cover 19 is aligned with a substantially central recess 17c provided in the bottom plate 17, and the front front plate 28 is in contact with the front of the heat exchange cover 19 with almost no gap to ensure the front sealing performance. be able to. For this reason, a packing for sealing that is normally required is not required, and the assembly workability of the heat pump heat source machine can be improved and rationalized.

  Furthermore, since there is almost no gap, even if the heat radiator 5 (water-refrigerant heat exchanger 11) having a large mass moves during transportation, there is no dent in the exterior front plate 28 due to the influence. It can be set as the heat pump heat source machine excellent in conveyance manufacture. This means that the packaging material for conveyance can be made inexpensive, and rationalization can be achieved.

  Next, when disassembling the main body for maintenance, the above order is reversed. When the exterior front plate 28 is removed and the exterior front plate is assembled again, the heat exchange cover 19 is once fastened to the bottom plate 17. Thus, since the position of the heat exchange cover 19 is determined, the screw mounting holes 28b of the exterior front plate 28, the plurality of holes 19b of the heat exchange cover 19, and the screwing holes 17e of the bottom plate 17 are accurately positioned. Assembling becomes very easy.

  The heat exchange cover 19 is held by a wall front 19a fixed by the exterior front plate 28, a right vertical lower portion 19d fastened by a substantially central recess 17d of the bottom plate 17, and a right vertical upper portion 19e fastened by the partition plate 22. Since all are from the front side, they can be easily removed by removing the exterior front plate 28 and the motor base 21 as shown in FIG.

  Thereafter, if the brazing of the forward and return refrigerant pipes 5a and the forward and return water pipes 5b of the radiator 5 (water-refrigerant heat exchanger 11) is removed, the radiator heat insulator top 18a is removed, and the radiator 5 (water -The refrigerant heat exchanger 11) and the radiator step contact 18b can be taken out from the front simultaneously. Therefore, the replacement of the radiator 5 (water-refrigerant heat exchanger 1) becomes very easy and the maintainability is improved.

  In particular, the radiator 5 (water-refrigerant heat exchanger 11) is heated with tap water in the refrigerant circuit 8, but in order to increase the heat exchange rate, it is spiral and has a very long copper pipe of 10 m or more. Therefore, there is a risk that impurities in the tap water will be deposited and deposited in the spiral, especially at the corner. This can be said to increase the possibility of accumulation in tap water with a large amount of impurities.

  Therefore, there is a possibility that the radiator 5 (water-refrigerant heat exchanger 11) may be replaced by maintenance in the market, but the radiator 5 (water-refrigerant heat exchanger 11) can be easily removed as described above, On the contrary, it can be attached and improving the detachability leads to an improvement in the circadability of the heat pump heat source machine.

  The refrigerant circuit 8 of the heat pump heat source apparatus 1 is preferably operated at a pressure exceeding the critical pressure using carbon dioxide as the refrigerant. Since the boiling temperature can be increased by using carbon dioxide as a refrigerant, it is possible to increase the amount of heat that can be used and to prevent the hot water from running out. By using relatively inexpensive and stable carbon dioxide as a refrigerant, the product cost can be reduced and the reliability can be improved. In addition, carbon dioxide has an ozone depletion coefficient of zero and a global warming coefficient of about 1/700 of the alternative refrigerant HFC-407C, which is very small.

  However, even if it is other refrigerants, there is no particular restriction on the configuration of the present invention. In addition to storing hot water in the hot water storage tank 12, the hot water storage tank 12 may be used for heating equipment such as a heating tank, floor heating, and hot water heating.

  As described above, the heat pump heat source device according to the present invention is used in a heat pump water heater that operates hot pumps at night to store hot water as a night heat storage device, and a heating device such as a hot water storage tank, floor heating, or hot water heating. In addition, it may be used for heating devices and equipment, and it is possible to improve assembly, reduce noise, streamline, and improve maintenance.

4 compressor 5 radiator (water-refrigerant heat exchanger)
6 Pressure reducing means (expansion valve)
7 Evaporator (Air-refrigerant heat exchanger)
8 Refrigerant circuit 11 Water-refrigerant heat exchanger 17 Exterior bottom plate 17a Frame portion 17b Front frame portion 17b Near center recess 17c Near right recess 19 Heat exchanger cover 22 Partition plate 28 Exterior front plate 30 Exterior top plate 31 Fastening screw 32 Fastening screw

Claims (3)

A refrigerant circuit formed by connecting a compressor, a water-refrigerant heat exchanger, a decompression means, and an evaporator;
A heat insulator in which the water-refrigerant heat exchanger is disposed inward;
A heat exchanger cover disposed outside the heat insulating material ;
A blower fan for passing air through the evaporator;
A front plate constitute exterior and passes air blown by the blower fan,
Constituting the exterior, at least a bottom plate on which the compressor is placed ;
A partition plate that isolates the interior of the exterior into at least a portion in which the water-refrigerant heat exchanger and the blower fan are disposed and at least a portion in which the compressor and the decompression unit are disposed ;
The bottom plate has a frame portion formed by bending an end portion upward,
Fixing the heat exchange cover includes a front wall portion sandwiched between the said front plate and the front Symbol frame portion, and a right vertical upper fixed to the partition plate, and the right vertical upper portion of the frame portion is provided below And has a right vertical bottom,
In the front of the wall, the right vertical upper part, the right vertical lower part is provided with a mounting hole for fastening and fixing from the front plate side,
The heat pump heat source characterized in that the right vertical lower portion is configured to be fastened and fixed to the frame portion in a state of being engaged with the frame portion so as to be positioned on the inner side of the exterior with respect to the frame portion. Machine. The front Symbol frame portion, a first recess which is recessed inwardly of the outer and has a mounting hole for fastening fixed from the front plate side is provided,
The heat pump heat source apparatus according to claim 1, wherein the front wall portion is inserted into the first recess. The frame portion is provided with a second recess that has an attachment hole for fastening and fixing from the front plate side and is recessed inward of the exterior,
The right vertical lower portion is configured to be fastened and fixed to the second recess while being engaged with the second recess so as to be located on the inner side of the exterior with respect to the second recess. The heat pump heat source machine according to claim 1 or 2.