JP6499565B2 - Heat pump equipment - Google Patents

Description

  The present invention relates to a heat pump device that uses a heat source such as underground heat.

2. Description of the Related Art Heat pump devices that cool indoors by pumping up indoor heat and releasing it outdoors are widely used.
When the outside air temperature is high as in summer and heat is radiated to such outside air, the operating cost of the heat pump device increases.

  The outside temperature varies greatly depending on the season and day and night, but the temperature in the ground hardly changes throughout the year. Then, the heat pump apparatus which releases heat to the underground which is low temperature in the summer has been proposed and has been put into practical use (for example, see Patent Document 1 (FIG. 1)).

Patent document 1 is demonstrated based on the following figure.
As shown in FIG. 11, the cold / hot water system 100 includes a geothermal heat pump unit 101 that uses geothermal heat, an air heat heat pump unit 120 that uses atmospheric heat, an indoor terminal 130 such as a fan coil, and the like. It consists of a group of pipes that connect.

  One wall 102 of the geothermal heat pump unit 101 is provided with an underground outlet connection port 103 and an underground return connection port 104, and a cold / hot water outlet connection port 105 is provided on the other wall 108, and is connected with a cold / hot water return connection. A mouth 106 is provided at the bottom.

  A first internal pipe 111 extends from the cold / hot water connection port 105 into the housing 107, and a second internal pipe 112 extends from the cold / hot water return connection port 106 into the housing 107. A third internal conduit 113 extends from the port 104 into the housing 107, and a fourth internal conduit 114 extends from the underground connection port 103 into the housing 107.

Then, one end and the other end of the underground heat exchanger 115 are connected to the underground forward connection port 103 and the underground return connection port 104.
The cold / hot water connection port 105 and the air heat heat pump unit 120 are connected by the first pipe 121, and the air heat heat pump unit 120 and the indoor terminal 130 are connected by the second pipe 122, and the indoor terminal 130 and the cold / hot water return. The connection port 106 is connected to the third pipeline 123.

The water cooled by the underground heat pump unit 101 is further cooled by the air heat heat pump unit 120 through the first pipe 121. Further, the cooled water is supplied to the indoor terminal 130 via the second conduit 122. Cold air is discharged indoors by the indoor terminal 130. The water warmed by the discharge is returned to the underground heat pump unit 101 via the third pipe 123.
Assuming that the temperature near the cold / hot water outlet 105 is t1 and the temperature near the cold / hot water return 106 is t2, t1 <t2, and in a certain measured value, t1 is 17 ° C. and t2 is 19 ° C. Met.

The geothermal heat pump unit 101 serves to cool water that has been warmed to a temperature t2, and for this purpose, heat is released into the ground via the geothermal heat exchanger 115.
If the temperature near the underground connection port 103 is t4 and the temperature near the underground return connection port 104 is t3, t3 is naturally lower than t4. At a certain measured value, t3 was 23 ° C. and t4 was 25 ° C.

When cooling operation was carried out, water droplets 131 were observed at the lower part of the other wall 108. The mechanism of the generation of the water droplet 131 will be described with reference to the drawings.
As shown in FIG. 12, the bottom of the other wall 108 is fixed to the bottom plate 125 with screws 132, and a low-temperature cold / hot water outlet 105 is attached to the other wall 108.

  The other wall 108 is cooled by the cold / hot water connection port 105. Water vapor contained in the atmosphere touches the outer surface and the inner surface of the other wall 108 having a low temperature. Although the outside of the wall 108 is diffused by wind, the inside of the wall 108 is a semi-enclosed space, so that air stagnates and condensation 133 is particularly likely to occur on the inner surface. This condensation 133 flows down the inner surface of the other wall 108.

Condensation 133 that has flowed down travels along screw 132 and oozes out to the outer surface of the other wall 108. This bleeding grows into water droplets 131.
Due to the water droplets 131, the appearance of the underground heat pump unit 101 deteriorates, and countermeasures are required.

JP-A-2015-148362

  The present invention fixes a wall (side plate) to a bottom plate in a geothermal heat pump unit (hereinafter referred to as a heat pump device) in which a cold / hot water outlet connection port is provided on a wall (side plate) constituting a housing. It is an object of the present invention to provide a heat pump device that can prevent a phenomenon in which water droplets ooze out of a casing along a screw.

The invention according to claim 1 is a housing incorporating a heat pump circuit, a heat source forward connection port connected to a pipe line leading to a heat source, a heat source return connection port connected to a pipe line returning from the heat source, and an indoor terminal And a cold / hot water return connection port connected to a pipeline returning from the indoor terminal, and discharging air to the heat source during cooling operation, In the heat pump device that releases cool air from the terminal to the room,
The housing includes a bottom plate, four side plates extending upward from the bottom plate, and a top plate that closes the top surface.
An inner wall disposed at a predetermined distance from any one of the side plates within the housing is further provided,
The specific side plate is provided with a first hole having a diameter larger than the outer diameter of the cold / hot water outlet connection port, and the inner wall is provided with a first support hole for supporting the cold / hot water outlet connection port. The tip of the supported cold / hot water outlet connection port passes through the first hole and protrudes from the specific side plate,
The specific side plate is screwed to the bottom plate, and the tip of the screw protrudes into the housing and extends below the inner wall,
The inner wall is provided with dripping guiding means for guiding the condensation generated on the inner wall from dripping onto the screw.

  The invention according to claim 2 is characterized in that the drip guiding means is a notch that opens downward.

  The invention according to claim 3 is characterized in that the notch is a V-shaped notch that opens downward.

In the invention according to claim 1, since the low temperature cold / hot water connection port is supported by the inner wall, condensation occurs on the inner wall. The dew flows down along the inner wall and partly goes to the screw below. In the present invention, the dropping guide means for guiding the condensation generated on the inner wall from dropping on the screw is provided on the inner wall. The dripping guiding means can prevent condensation from dripping onto the screw.
Therefore, according to this invention, the heat pump apparatus which can prevent the phenomenon in which a water droplet oozes out of a housing | casing along the screw which fixes a specific side plate to a bottom plate is provided.

  In the invention according to claim 2, the dropping guiding means is a notch that opens downward. Since the notch can be easily formed on the inner wall by punching with a press, the processing cost for forming the notch can be reduced.

In the invention according to claim 3, the notch is a V-shaped notch that opens downward. Since the V-shaped notch can be formed by cutting or cutting in addition to punching with a press, the processing cost for forming the notch can be reduced.
The dew that flows down flows along the hypotenuse of the notch to the lower side of the inner wall, and drops as water droplets from the lower side to the upper surface of the bottom plate. Since there is a screw directly under the V-shaped notch, and the flow direction of dew is changed by the V-shaped notch, water drops do not fall on the screw.

It is a block diagram of the cold / hot water system containing the heat pump apparatus which concerns on this invention. It is a front view of the heat pump device concerning the present invention. 1 is a perspective view of a heat pump device according to the present invention. FIG. 3 is an enlarged view of a main part of FIG. 2. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a view taken in the direction of arrow 6 in FIG. 4. It is an effect | action figure of the V-shaped notch as a dripping guide means. It is a figure explaining the example of a change of V-shaped notch. It is a figure explaining the example of a change of a dripping guide means. It is a figure explaining the further example of a change of a dripping guide means. It is a block diagram of the conventional cold / hot water system. It is a principal part enlarged view of the conventional geothermal heat pump apparatus.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  As shown in FIG. 1, the cold / hot water system 10 includes a heat pump device 11 that incorporates a first heat pump circuit 30 and uses a heat source such as underground heat, and air heat that incorporates a second heat pump circuit 50 and uses atmospheric heat. It consists of a heat pump device 40, an indoor terminal 70 such as a fan coil, and a pipe line group connecting them.

  In addition to geothermal heat, river water, seawater, well water, water storage, and the like can be used as the heat source, and any type can be used.

  An inner wall 80 is provided on the inner side of the left side plate 12 of the heat pump device 11, for example. It is provided together. The left side plate 12 is a specific side plate specified from four side plates.

  A first internal pipeline 21 extends from the cold / hot water connection port 15 into the housing 17, and a second internal pipeline 22 extends from the cold / hot water return connection port 16 into the housing 17, and the heat source return connection port A third internal conduit 23 extends from 14 into the housing 17, and a fourth internal conduit 24 extends from the heat source forward connection port 13 into the housing 17. The fourth internal conduit 24 is a conduit toward the heat source, and the third internal conduit 23 is a conduit returning from the heat source.

  One end and the other end of the heat source intermediate heat exchanger 25 are connected to the heat source forward connection port 13 and the heat source return connection port 14. In addition, when pumping up and using the river water, seawater, well water, and stored water as a heat source, the heat exchanger 25 in a heat source can be omitted. Moreover, you may utilize the water cooler which supplies the water of fixed temperature as a heat source. Also in this case, the heat source medium heat exchanger 25 is not necessary.

  The first heat pump circuit 30 includes a closed-loop first refrigerant pipe 31, a first compressor 32 interposed in the first refrigerant pipe 31, a first four-way valve 33, a first heat source side heat exchanger 34, The first expansion valve 35 and the first load side heat exchanger 36 are included.

  A third internal conduit 23 and a fourth internal conduit 24 are connected to the first heat source side heat exchanger 34, and a heat source side circulation pump 37 and a heat source side cistern 38 are provided in the third internal conduit 23. . The heat source side cistern 38 is a tank or a reservoir for storing a circulating fluid (antifreeze, water, etc.).

  The first internal conduit 21 and the second internal conduit 22 are connected to the first load-side heat exchanger 36, and a load-side circulation pump 39 and an air conditioning / heating system turn 41 are provided in the second internal conduit 22. . The cooling / heating system turn 41 is a tank or a reservoir for storing a circulating fluid (antifreeze, water, etc.).

  The air heat heat pump device 40 includes a first connection port 42 and a second connection port 43. The built-in second heat pump circuit 50 includes a closed-loop second refrigerant pipe 51, a second compressor 52, a second four-way valve 53, and a second heat source side heat exchanger 54 interposed in the second refrigerant pipe 51. The second expansion valve 55 and the second load side heat exchanger 56 are included.

A first pipeline 57 extends from the cold / hot water connection port 15, and the first pipeline 57 is connected to the first connection port 42. Further, the second pipe 58 extends from the second connection port 43, and the second pipe 58 is connected to the forward header 59. A plurality of third pipelines 61 extend from the forward header 59 and are connected to the indoor terminal 70.
A fourth pipeline 62 extending from the indoor terminal 70 is connected to the return header 63. A fifth pipe 64 extending from the return header 63 is connected to the cold / hot water return connection port 16.

In the cold / hot water system 10 having the above configuration, the operation of the cold / hot water system 10 in the cooling setting will be described.
In the cooling setting, the refrigerant in the first heat pump circuit 30 is rotated in the first refrigerant pipe 31 in the clockwise direction in the drawing by the flow path switching action of the first four-way valve 33.
The heat retained in the refrigerant is given to the circulating fluid flowing in from the third internal conduit 23 by the first heat source side heat exchanger 34, and the warmed circulating fluid passes through the fourth internal conduit 24 and passes through the heat source connection port 13. Head for.

  On the other hand, the refrigerant cooled by the first heat source side heat exchanger 34 is adiabatically expanded by the first expansion valve 35, and the temperature further decreases. The low-temperature refrigerant cools the circulating fluid flowing from the second internal conduit 22. The cooled circulating liquid travels from the first internal pipe 21 to the air heat heat pump device 40 through the first pipe 57. The temperature t1 in the vicinity of the cold / hot water connection port 15 is 17 ° C., for example.

  The same applies to the second heat pump circuit 50, while the second heat source side heat exchanger 54 radiates heat to the atmosphere, and the second load side heat exchanger 56 further cools the circulating fluid flowing from the first pipe 57. The cooled circulating fluid passes through the second pipe 58, the forward header 59, and the third pipe 61 to the indoor terminal 70, and the indoor terminal 70 releases cool air into the room. The circulating fluid warmed by the discharge returns to the heat pump device 11 through the fourth pipe 62, the return header 63, and the fifth pipe 64. The temperature t2 in the vicinity of the cold / hot water return connection port 16 is higher than the temperature t1, and is 19 ° C., for example.

The circulating fluid warmed by the first heat source side heat exchanger 34 reaches the heat source intermediate heat exchanger 25 through the fourth internal conduit 24 and the heat source forward connection port 13, and passes through the heat source intermediate heat exchanger 25. Release heat into the ground. The temperature t4 in the vicinity of the heat source outgoing connection port 13 is 25 ° C., for example.
The circulating fluid that has become low temperature by this discharge returns to the first heat source side heat exchanger 34 through the heat source return connection port 14 and the third internal conduit 23. The temperature t3 in the vicinity of the heat source return connection port 14 is lower than the temperature t4, and is 23 ° C., for example.

  In the case of heating setting, the first and second heat pump circuits 30 and 50 circulate the refrigerant counterclockwise. Therefore, the cooling / warm water system 10 can perform both the cooling setting and the heating setting.

The specific configuration of the heat pump device 11 described above, in particular, the arrangement of the heat source return connection port 13, the heat source return connection port 14, the cold / hot water return connection port 15, and the cold / hot water return connection port 16 will be described in detail.
As shown in FIG. 2, the heat pump device 11 combines a heat source forward connection port 13, a heat source return connection port 14, a cold / hot water return connection port 15, and a cold / hot water return connection port 16 on the left side plate 12 of the housing 17. Prepared. The housing 17 includes a bottom plate 66 and four side plates extending upward from the bottom plate 66 (left side plate 12, right side plate 67, front side plate 68, and rear side plate disposed behind the front side plate 68 (FIG. 3, 69)) and a hexahedron (box) composed of a top plate 71.

As shown in FIG. 3, the heat source forward connection port 13 and the heat source return connection port 14 provided on the left side plate 12 are arranged side by side. A cold / hot water return connection port 16 is disposed above the heat source return connection port 13 and the heat source return connection port 14, and a cold / hot water return connection port 15 is disposed above the cold / hot water return connection port 16.
Since the four connection ports 13 to 16 are concentrated on the left side plate 12, connection piping work can be performed efficiently. Since the four connection ports 13 to 16 are appropriately separated from each other in the vertical and horizontal directions, the pipes can be easily connected. Therefore, piping work time can be shortened.

As shown in FIG. 4, the bottom plate 66 includes a peripheral wall portion 66a extending upward at the edge, the left side plate 12 is applied to the peripheral wall portion 66a, and a long screw 95 is screwed horizontally from the outside.
The screw 95 is screwed into various places, and the required length varies. In order to make the parts common, a screw 95 having a length under the neck of at least the distance L is adopted and screwed into various places.
As a result, the tip of the screw 95 that penetrates the left side plate 12 and the peripheral wall portion 66 a reaches below the inner wall 80.

  The left side plate 12 has a first hole 76 having a diameter larger than the outer diameter of the cold / hot water outlet connection port 15, a second hole 77 having a diameter larger than the outer diameter of the cold / hot water return connection port 16, and a heat source return connection port. A third hole 78 having a diameter larger than the outer diameter of the fourteenth holes 78 and a fourth hole 79 having a diameter larger than the outer diameter of the heat source connecting port 13 are provided.

  Further, an inner wall 80 is provided in the housing 17 at a position separated from the left side plate 12 by a predetermined distance L. The inner wall 80 is a vertically long flat plate and includes a rib 80a at the upper end. The rib 80a plays a role of increasing the bending rigidity of the flat plate, but is not in contact with the left side plate 12 because it is shorter than the distance L.

  A first support hole 81 that supports the cold / hot water return connection port 15, a second support hole 82 that supports the cold / hot water return connection port 16, and a third support hole 83 that supports the heat source return connection port 14 in the inner wall 80. And a fourth support hole 81 for supporting the heat source forward connection port 13.

The cold / hot water connection port 15 is integrally provided with a flange-shaped flange portion 86 in the middle of the cylindrical connection port main body 85.
Preferably, a boss portion 87 is provided around the first to second support holes 81 to 82. The flange portion 86 is fixed to the boss portion 87 with screws 88 or bolts. The same applies to the cold / hot water return connection port 16.

  The left side plate 12 is provided with a first hole 76 having a diameter larger than the outer diameter of the cold / hot water outlet connection port 15 at a location facing the support position of the cold / hot water outgoing connection port 15. The connection port body 85 is inserted into the first hole 76, the tip of the cold / hot water connection port 15 protrudes from the left side plate 12, and the first conduit 57 is connected to the protruding portion. Since the first hole 76 has a large diameter, the cold / hot water connection port 15 does not touch the left side plate 12.

  Similarly, the cold / hot water return connection port 16, the heat source return connection port 14, and the heat source return connection port 13 are inserted into the second to fourth holes 77 to 79, and the tips protrude from the left side plate 12. Since the holes 77 to 79 have a large diameter, the cold / hot water return connection port 16, the heat source return connection port 14, and the heat source return connection port 13 do not touch the left side plate 12.

  Since the temperature t1 near the cold / hot water outlet connection port 15 and the temperature t2 near the cold / hot water return connection port 16 are low during the cooling operation, the inner wall 80 may be condensed in summer. Then, a water droplet 89 falls from the inner wall 80 onto the bottom plate 66. The water droplet 89 is discharged through a drain port provided in the bottom plate 66. A part of the water droplet 89 hits a long screw 95.

  The left side plate 12 has a large diameter first hole 76, so it does not touch the low-temperature cold / hot water connection port 15, and air of a distance L between the left side plate 12 and the inner wall 80. Since there is a layer and this air layer exhibits a heat insulating effect, the temperature t5 of the left side plate 12 becomes sufficiently high, and the left side plate 12 does not condense.

  In addition to supporting the coldest hot / cold water return connection port 15 and the next cooler cold / hot water return connection port 16 by the inner wall 80 during the cooling operation, the cold / hot water return connection port 15 and the cold / hot water return connection port are provided in terms of temperature. The heat source return connection port 14 and the heat source return connection port 13 that are higher than 16 are also supported by the inner wall 80 together, so that the temperature is lowered by the transfer of cold heat from the cold / hot water return connection port 15 and the cold / hot water return connection port 16. The temperature drop of the inner wall 80 can be suppressed by the heat transfer from the heat source return connection port 14 and the heat source return connection port 13.

Further, the boss portion 87 provided on the inner wall 80 can be omitted.
By omitting, the manufacturing cost of the inner wall 80 can be reduced.
On the other hand, by providing the boss portion 87, heat conduction between the cold / hot water outgoing connection port 15 and the inner wall 80 or between the cold / hot water return connection port 16 and the inner wall 80 is performed through the boss portion 87 having a small area. . Since the amount of heat conduction is proportional to the cross-sectional area, it is possible to raise the temperature of the inner wall 80 and to reduce the frequency of dew condensation when there is no boss portion 87 than when there is no boss portion 87.

  Since the boss portion 87 is provided only around the first support hole 81 and the second support hole 82 corresponding to the coldest hot / cold water outgoing connection port 15 and the next coldest hot / warm water return connection port 16 during the cooling operation, The heat transfer from the forward connection port 15 and the cold / hot water return connection port 16 to the inner wall 80 is suppressed as much as possible, and the heat source return connection is higher in temperature than the cold / hot water forward connection port 15 and the cold / hot water return connection port 16. The boss portion 87 is not provided around the third support hole 83 and the fourth support hole 84 corresponding to the port 14 and the heat source forward connection port 13, and the flange portion 86 is brought into direct contact with the inner wall 80, thereby returning the heat source. It is possible to positively transfer heat from the opening 14 and the heat source connecting port 13 to the inner wall 80, to reduce the temperature drop of the inner wall 80, and to reduce the frequency of condensation.

In the embodiment, the inner wall 80 supports all of the cold / hot water return connection port 15, the cold / hot water return connection port 16, the heat source return connection port 14, and the heat source return connection port 13. It doesn't matter.
That is, only the coldest hot / cold water outlet connection port 15 is supported by the inner wall 80 during the cooling operation, and the other cold / warm water return connection port 16, the heat source return connection port 14, and the heat source return connection port 13 are provided on the left side plate 12. To support. The inner wall 80 can be downsized.
Alternatively, the coolest hot / cold water return connection port 15 and the next cooler cold / warm water return connection port 16 are supported by the inner wall 80 during the cooling operation, and the other heat source return connection port 14 and the heat source return connection port 13 are left. The side plate 12 is supported.

The inner wall 80 cooled at the cold / warm water connection port 15 may be directly attached to the left side plate 12, but it is desirable to have a structure described below.
As shown in FIG. 5A, which is a plan sectional view, the inner wall 80 includes left and right side walls extending from left and right side plates 12 to the left side plate 12, and left and right ends of the vertical wall portions 91 and 91. Horizontal wall portions 92, 92 extending in parallel with the side plate 12 of the first side plate 12. A heat insulating plate 93 such as a rubber plate or a cork plate having a lower thermal conductivity than the left side plate 12 and the inner wall 80 (lateral wall portion 92) is interposed between the horizontal wall portion 92 and the left side plate 12. Then, heat conduction from the inner wall 80 to the left side plate 12 is suppressed, and there is no fear that the left side plate 12 is excessively cooled by the low temperature inner wall 80.
As shown in FIG. 5B, the heat insulating plate 93 is a vertically long strip.

  The heat insulating plate 93 may be a spacer that forms a gap between the lateral wall portion 92 and the left side plate 12. The spacer may be a protrusion called a dowel, a protrusion formed by burring, a metal piece or a resin piece fixed to the lateral wall 92 with an adhesive. Since the spacer creates a gap between the inner wall 80 and the left side plate 12, heat conduction from the inner wall 80 to the left side plate 12 is suppressed, and the left side plate 12 may be excessively cooled by the low temperature inner wall 80. Will disappear.

  6 is a view taken in the direction of arrow 6 in FIG. 4. As shown in FIG. 6, the front side plate 68, the rear side plate 69, and the left side plate 12 are applied to the peripheral wall portion 66a of the bottom plate 66. 12 is fixed to the peripheral wall 66a with screws 95. Further, the inner wall 80 that supports the connection ports 13 to 16 is fixed to the left side plate 12 such that the left and right lateral wall portions 92 and 92 are coupled to the left side plate 12.

  The lower side 80e of the inner wall 80 is formed with a V-shaped notch 96, 96 extending downward as a drip guiding means at a position directly above the screws 95, 95. Since the V-shaped notch 96 can be easily formed by punching with a press or cutting with a saw, the forming method is arbitrary.

  As shown in FIG. 7, the V-shaped notch 96 provided at a position directly above the screw 95 is constituted by a vertex 96a and oblique sides 96b and 96b obliquely descending from the vertex 96a. The spread angle θ1 formed by the oblique sides 96b and 96b is selected from the range of 40 to 120 °. The opening width W of the V-shaped notch 96 is set larger than the diameter d of the screw 95.

  In principle, the perpendicular passing through the vertex 96a and the perpendicular passing through the center of the screw 95 are in agreement. That is, in principle, the offset δ is zero. However, it is desirable to allow δ to some extent including processing errors and mounting errors. Even in this case, it is necessary to prevent the screw 95 from deviating from the opening width W, and δ is preferably less than half of (W−d).

By providing the V-shaped notch 96 in this manner, among the dew flowing down the inner wall 80, the dew flowing down to the vertex 96a changes direction to the left, right, left or right at the vertex 96a and flows along the oblique side 96b. Of the dew that flows down the inner wall 80 to the lower side 80e, the dew that flows down to the hypotenuse 96b flows along the hypotenuse 96b as it is, and reaches the lower side 80e. The dew collected on the lower side 80e grows and drops as water droplets 89. Since the water droplet 89 falls only outside the opening width W, there is no fear that the water droplet 89 hits the screw 95.
Since it does not hit the screw 95, the water droplet 89 does not ooze out of the casing through the screw 95.

As shown in FIG. 8A, the V-shaped notch 96 may be formed by extending the vertical side 96c from the lower end of the oblique side 96b.
Further, as shown in FIG. 8B, the second hypotenuse 96d may be extended from the lower end of the hypotenuse 96b. In this case, the spread angle θ2 of the opening is set smaller than the spread angle θ1 at the vertex 96a. This is because when the hypotenuses 96b and 96d become nearly horizontal, the risk of the water droplet 89 falling from the hypotenuses 96b and 96d increases.

The dripping guiding means is a means for guiding the condensation generated on the inner wall 80 not to drop on the screw 95, and may take the form described below in addition to the V-shaped notch 96.
As shown in FIG. 9, the drip guiding means provided on the inner wall 80 directly above the screw 95 may be a circular arc cutout 96 </ b> B that is formed on the lower side 80 e of the inner wall 80 and opens downward. The arc notch 96B can be easily formed on the inner wall 80 by punching with a press, so that the processing cost required for forming the notch can be reduced.

  Since the dew flowing down the inner wall 80 changes the flow along the arc, there is no fear of dripping onto the screw 95. The arc may be any of a part of a circle including a semicircle, a U-shape, a part of an ellipse including a semi-ellipse, or a part of an ellipse including a semi-ellipse.

Further, as shown in FIG. 10 (a), the drip guiding means may be an upwardly convex arcuate ridge 96C and / or an upwardly convex arcuate groove 96D.
As shown in FIG. 10B, which is a cross-sectional view taken along the line bb of FIG. 10A, the flange 96C and the arc-shaped groove 96D can be formed by pressing or stamping. Note that the flange 96C may be provided with a separate part on the inner wall 80 by welding or screwing, and the groove 96D may be formed by cutting the inner wall 80.

  Further, the ridge 96C may have a V-shape that opens downward, a linear shape with a downward slope on one of the left and right sides, as long as the shape does not cause dew to drip on the screw 95. Is optional. The same applies to the groove 96D.

  As described with reference to FIG. 4, it is most important to provide the inner wall 80 with respect to the left side plate 12, and the cold / hot water return connection port 15, the cold / hot water return connection port 16, the heat source return connection port 14, and the heat source return route. The layout of the connection port 13 is arbitrary, but preferably, as described with reference to FIG. 3, the low-temperature cold / hot water return connection port 15 and the cold / hot water return connection port 16 are connected to the high-temperature heat source return connection port 14 and the heat source return connection. Arranged above the mouth 13.

  In FIG. 4, since the lower heat source return connection port 14 and the heat source return connection port 13 are relatively high in temperature, a warm air zone is formed. The cold air generated by the low-temperature cold / hot water outlet connection port 15 and the cold / hot water return connection port 16 flows downward to the bottom plate 66, but is blocked by the warm air zone and does not reach the bottom plate 66. Therefore, there is no concern that condensation occurs on the bottom surface of the bottom plate 66.

  In addition, the lower third internal conduit 23 extending from the heat source return connection port 14 into the housing 17 and the lower fourth internal conduit 24 extending from the heat source return connection port 13 into the housing 17 are relatively high in temperature. Therefore, these also form a warm air zone. The upper first internal conduit 21 and the second internal conduit 22 are low in temperature, and the cold air generated by these is descending toward the bottom plate 66, but is blocked by the warm air zone and reaches the bottom plate 66. There is nothing. Therefore, there is no concern that condensation occurs on the bottom surface of the bottom plate 66.

  The inner wall 80 may be attached to one of the other side plates (the right side plate 67, the front side plate 68, or the rear side plate 69) in addition to being attached to the left side plate 12. In this case, holes 76 to 79 through which the four connection ports 13 to 16 are inserted are provided in another side plate facing the inner wall 80.

  The heat pump device 11 of the present invention can be used alone or in combination with the air heat heat pump device 40. In this case, the cold / hot water system 10 is comprised by the heat pump apparatus 11, the heat source intermediate heat exchanger 25, the indoor terminal 70, and a pipe line group.

  The present invention is suitable for a heat pump device that uses a heat source such as underground heat.

  DESCRIPTION OF SYMBOLS 11 ... Heat pump apparatus, 12 ... Specific side plate (left side plate), 13 ... Heat source outgoing connection port, 14 ... Heat source return connection port, 15 ... Cold / hot water return connection port, 16 ... Cold / hot water return connection port, 17 ... Housing | casing, 23 ... Pipe returning from the heat source (third internal pipe), 24 ... Pipe leading to the heat source (fourth internal pipe), 30 ... Heat pump circuit (first heat pump circuit), 66 ... Bottom plate, 67 ... Side plate (right) Side plate), 68 ... side plate (front side plate), 69 ... side plate (rear side plate), 70 ... indoor terminal, 71 ... top plate, 76 ... first hole, 80 ... inner wall, 81 ... first support hole, 95 ... screw , 96, 96B, 96C, 96D ... Drip guiding means, L ... a predetermined distance.

Claims (3)

A heat source circuit connection port connected to a pipe heading to a heat source, a heat source return connection port connected to a pipe line returning from the heat source, and a pipe line heading to an indoor terminal are connected to a housing containing a heat pump circuit. A cool / warm water connection port and a cool / warm water return connection port connected to a pipe returning from the indoor terminal are provided, and during cooling operation, heat is released to the heat source, and cool air is discharged from the indoor terminal to the room. In the heat pump device,
The housing includes a bottom plate, four side plates extending upward from the bottom plate, and a top plate that closes the top surface.
An inner wall disposed at a predetermined distance from any one of the side plates within the housing is further provided,
The specific side plate is provided with a first hole having a diameter larger than the outer diameter of the cold / hot water outlet connection port, and the inner wall is provided with a first support hole for supporting the cold / hot water outlet connection port. The tip of the supported cold / hot water outlet connection port passes through the first hole and protrudes from the specific side plate,
The specific side plate is screwed to the bottom plate, and the tip of the screw protrudes into the housing and extends below the inner wall,
The heat pump device, wherein the inner wall is provided with dripping guiding means for guiding the condensation generated on the inner wall from dripping onto the screw.   2. The heat pump apparatus according to claim 1, wherein the dripping guiding means is a notch that opens downward.   The heat pump device according to claim 2, wherein the notch is a V-shaped notch that opens downward.

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