JP2020067200A - Air conditioner for housing - Google Patents

Abstract

To obtain an air conditioner for a housing which prevents refrigerant leakage, enables highly efficient air conditioning, and enables easy construction.SOLUTION: An air conditioner for a housing includes: an air conditioner (9) which conducts heat exchange of air for air conditioning with water for the heat exchange to discharge the air into a living space (S); a heat source machine (1) having a heat pump (15) in which a water heat exchanger (12) which conducts heat exchange between water for the heat exchange and air for a heat source through a refrigerant, an air heat exchanger (13), and a compressor (14) are integrated; an underfloor storage part (2) in which the heat source machine (1) is installed; and a water pipe (3) for circulating the water for the heat exchange to the heat source machine (1) and the air conditioner (9).SELECTED DRAWING: Figure 2

Description

  The present invention relates to a residential air conditioner.

  Generally, in a house, each room is equipped with an air conditioner (air conditioner) for air conditioning. This air conditioner is mainly of a separate type, and has a structure in which the separated indoor unit and outdoor unit are connected by a refrigerant pipe.

JP, 10-148366, A

  Therefore, a plurality of air conditioners are required for each room, and there is a problem that the installation space is taken up, and refrigerant leakage and cooling / heating capacity decrease due to refrigerant piping construction. Further, the outdoor unit uses outside air having a low exergy (maximum energy that can be taken out until a certain system reaches an equilibrium state with the surroundings) as a heat source, so that energy consumption efficiency is low and there is a problem of noise generation.

  The present invention, in order to solve the above problems, an air conditioner that exchanges heat between water for heat exchange and air for air conditioning to output the air for air conditioning to a living space, and the water for heat exchange and the air for a heat source via a refrigerant. A heat source unit having a heat pump in which a water heat exchanger that exchanges heat, an air heat exchanger, and a compressor are integrated, an underfloor storage section in which the heat source unit is installed, the heat source unit, and the air conditioner. Its main feature is that it has a water pipe for circulating the replacement water.

  According to the first aspect of the present invention, since the heat exchange water is sent from the heat source device to the air conditioner in each room via the water pipe to perform air conditioning, it is not necessary to install an air conditioner and install refrigerant pipes for each room. Since the heat pump has the water heat exchanger, the air heat exchanger, and the compressor integrated, there is no refrigerant leakage, and there is no decrease in cooling and heating capacity due to an increase in the refrigerant pipe length. Since the heat source machine is stored in the dead space under the floor, the living space is not wastefully limited. Since it is stored under the floor, noise leakage from the heat source machine can be prevented, and there is no inconvenience to the neighborhood.

According to the invention of claim 2, since the air in the living space with high exergy is used as the air for the heat source of the heat source machine, the defrost operation of the heat source machine is reduced, and the efficiency of the temperature adjustment capacity of the heat exchange water is increased. Can be achieved.
According to the invention of claim 3, since the underfloor storage section uses the floor of the house foundation and the room, the construction is simple and the cost can be reduced. It is convenient to open and close the lid to easily maintain and inspect the heat source unit and other parts.

According to the invention of claim 4, underfloor ventilation can be performed by exhausting the air that has undergone heat exchange in the air heat exchanger of the heat source device to the outside through the exhaust passage. Further, when the air in the living space is used as the air for the heat source of the heat source machine, ventilation in the living space and under the floor can be performed at the same time. Moreover, the cost can be reduced without separately installing a ventilation device.
According to the invention of claim 5, the outside air of the living space can be cooled by using the air conditioner.
According to the invention of claim 6, comfortable air conditioning without draft feeling and temperature unevenness can be performed by the action of heat radiation of the radiation unit of the air conditioner.

It is a simplified explanatory view of a residential air conditioner of the present invention. It is a top view of the heat source machine shown in FIG. 1, and sectional drawing of a house foundation part. It is a simplified explanatory view showing a structure of a heat source unit and an air conditioner. It is sectional drawing which shows the structure of a water heat exchanger. It is a bottom side perspective view of an air conditioner. It is a bottom view of the air conditioner shown in FIG. It is an AA sectional view of the air conditioner shown in FIG. It is BB sectional drawing of the air conditioner shown in FIG. It is CC sectional drawing of the air conditioner shown in FIG.

  1 to 6 show an embodiment of a residential air conditioner of the present invention. This residential air conditioner includes a heat source unit 1, an underfloor storage unit 2, a water pipe 3, a return air duct 4, an exhaust duct 5, a return air fan 6, an outside air passage 7, an exhaust passage 8, an air conditioner 9, and a suction port. 10 and a controller 11 are provided. The air conditioner 9 exchanges heat between the heat exchange water and the air for air conditioning, and outputs the heat exchanged air for air conditioning to the living space S for air conditioning. The heat source unit 1 adjusts the temperature of the heat exchange water used in the air conditioner 9. In FIG. 1, the duct is simplified and shown by a thick solid line. Also, thick dotted arrows in each figure indicate the flow of outside air, return air, exhaust gas, and other air.

  The heat source device 1 includes a heat pump 15 in which a water heat exchanger 12 for exchanging heat between heat exchange water and heat source air via a refrigerant, an air heat exchanger 13, and a compressor 14 are integrated, and an air heat exchange fan. 16, a water feed pump 17, a cushion tank 18, and a casing 19. The heat pump 15, the air heat exchange fan 16, the water supply pump 17, and the cushion tank 18 are provided in the casing 19.

  The heat pump 15 includes a water heat exchanger 12 and an air heat exchanger 13 that perform different steps of a refrigerant evaporation process and a condensation process, a compressor 14 that compresses and conveys the refrigerant, and an expansion valve that expands the refrigerant. At least a depressurizing unit 20 such as the above, and a switching unit 21 such as a valve that switches between the evaporation process and the condensation process of the water heat exchanger 12 and the air heat exchanger 13, and these are connected by piping so that the refrigerant circulates. Become. The switching unit 21 switches between the cooling operation and the heating operation of the heat exchange water by the heat source device 1.

  The air heat exchanger 13 is configured by inserting a heat transfer tube 23 into the heat transfer plate 22. A refrigerant is caused to flow inside the heat transfer tube 23 by the compressor 14, and air is brought into contact with the heat transfer plate 22 and the heat transfer tube 23 by the air heat exchange fan 16, so that the heat transfer plate 22 and the heat transfer tube 23 are passed through. , Heat exchange between air and refrigerant.

  The water heat exchanger 12 is configured by partitioning the hollow portion with a heat transfer plate 24. The heat exchange water and the refrigerant are caused to flow through the divided hollow portion by the compressor 14 and the water supply pump 17, and the heat exchange water and the refrigerant are exchanged through the heat transfer plate 24. The heat exchange water that has undergone heat exchange in the water heat exchanger 12 becomes cold water or hot water and is sent to the cushion tank 18. Cold water is used as heat exchange water during cooling operation of the air conditioner 9, and hot water is used as heat exchange water during heating operation of the air conditioner 9.

  The water pipe 3 includes a forward pipe 25 and a return pipe 26. The forward pipe 25 and the return pipe 26 are connected to the water heat exchanger 12, the cushion tank 18, the water supply pump 17, and the heat exchanger 40 of the air conditioner 9 so as to circulate water. The water pump 17 sends heat exchange water from the heat source unit 1 to the air conditioner 9 via the forward pipe 25, and returns the heat exchange water from the air conditioner 9 to the heat source unit 1 via the return pipe 26. In the illustrated example, the cushion tank 18 is provided to secure the amount of water supplied to the air conditioner 9 and stabilize the temperature of the water supplied, but it may be omitted.

  The heat source unit 1 is installed in the underfloor storage unit 2. The underfloor storage section 2 is provided with a partition section 31 surrounded by a vertical wall 30 of a part of the housing foundation, a floor section 32 of a kitchen or other room above the partition section 31, and an underfloor storage section provided on the floor section 32. And a lid 33 that opens and closes for maintenance and inspection of the second heat source unit 1.

  The air conditioner 9 is installed on the ceiling portion 34 of the living space S such as a bedroom, a living room or a kitchen. The intake port 10 and the return air duct 4 are provided so as to send the air in the living space S such as a corridor, stairs, and a room to the underfloor storage unit 2, and heat source air for exchanging heat with the air heat exchanger 13 of the heat source unit 1. To use as. Specifically, the suction port 10 and the underfloor storage section 2 are connected by a return air duct 4 so that air can pass through, and the air in the living space S (return air) is sent to the underfloor storage section 2 by a return air fan 6. ing. The return air fan 6 is installed in the underfloor storage 2 for maintenance and inspection.

  The outside air passage 7 is provided so that outside air can be taken into the underfloor storage 2 from the outside. In the illustrated example, an outside air hole 35 is penetrated so that air can pass through a vertical wall 30 adjacent to the outdoors in the housing foundation constituting the underfloor storage unit 2 to form an outside air passage 7. Although not shown, a duct may be provided instead of the outside air hole 35 to form the outside air passage 7.

  By sending air with the return air fan 6 and the air heat exchange fan 16, the return air of the living space S is taken into the heat source unit 1 through the return air duct 4 and the underfloor storage unit 2, and is stored under the floor from the outside. The outside air is taken into the heat source unit 1 via the section 2. The outside air and the return air are exchanged with the refrigerant in the air heat exchanger 13. The air that has passed through the air heat exchanger 13 exits from the heat source device 1 by the air heat exchange fan 16.

  The exhaust passage 8 is provided so that the air that has exchanged heat with the air heat exchanger 13 of the heat source device 1 is discharged from the underfloor storage unit 2 to the outside via the underfloor 36. In the illustrated example, exhaust holes 37 are formed in the vertical wall 30 adjacent to the outside of the residential foundation, the vertical wall 30 of the residential foundation that partitions the underfloor 36, and the vertical wall 30 of the residential foundation that constitutes the underfloor storage unit 2. Is connected to allow air to pass therethrough, and the heat source unit 1 and the exhaust hole 37 of the underfloor storage unit 2 are connected to each other by the exhaust duct 5 to allow air to pass to form the exhaust passage 8.

  As shown in FIG. 5 to FIG. 9, the air conditioner 9 radiates the radiation unit R, the heat exchanger 40 for exchanging heat between the outside air and the air (return air) in the living space S as air conditioning air, and the air conditioning air. An air supply fan 41 for sending to the unit R, a drain pan 42, and a casing 43 are provided. The radiation unit R includes a first chamber portion 44 through which the air for air conditioning flows, and a second chamber portion that emits the heat of the air for air conditioning while letting the air for air conditioning entered from the first chamber portion 44 into a living space S such as a room. 45, and an airflow adjusting unit 46 that adjusts the wind speed and distribution of the air-conditioning air discharged from the first chamber unit 44 to the second chamber unit 45.

  The air conditioner 9 is installed on the ceiling of the living space S with the bottom surface of the second chamber portion 45 facing the living space S. The heat exchanger 40, the air supply fan 41, and the first chamber section 44 are provided inside the casing 43. The casing 43 has a return air inlet portion 47 that takes in the air (return air) in the living space S through a ceiling chamber T, a duct (not shown), and the like, and an outside air inlet portion 48 that takes in outside air. . The outside air intake port 48 is connected to the outside through an outside air duct 49.

  As shown in FIG. 3, the heat exchanger 40 is configured by inserting a heat transfer tube 51 into a heat transfer plate 50. The forward pipe 25 of the water pipe 3 is connected to the water inlet of the heat transfer pipe 51, and the return pipe 26 of the water pipe 3 is connected to the water outlet of the heat transfer pipe 51 via the water amount adjusting valve 52. The water transfer pump 17 causes heat exchange water to flow inside the heat transfer tube 51, and the air supply fan 41 causes air to contact the heat transfer plate 50 and the heat transfer tube 51, thereby passing through the heat transfer plate 50 and the heat transfer tube 51. To exchange heat between the air and the water for heat exchange. The heat transfer tube 51 preferably has an oval outer periphery, but may have a circular shape.

  As shown in FIG. 5 to FIG. 9, the airflow control unit 46 includes a group of first through holes 53 that discharge the air conditioning air to the second chamber unit 45, and the second chamber unit 45 supplies the air conditioning air to the living space. It has a group of second through holes 54 extending to S. The first chamber part 44 is provided with a flat plate-shaped first ventilation part 55 that is in contact with the second chamber part 45 and sends out air-conditioning air to the second chamber part 45. A group of first through holes 53 is formed in the first ventilation portion 55. The cross-sectional area of the first chamber portion 44 through which the air-conditioning air passes (the area in the direction parallel to the cutting plane in FIG. 8) narrows from the windward side to the leeward side.

  The second chamber part 45 has a flat plate-shaped second ventilation part 56 that comes into contact with the living space S and sends out air-conditioning air to the living space S, a heat storage part 57, and a collar for mounting the second ventilation part 56 and the heat storage part 57. And a frame 58 of. A group of second through holes 54 is formed in the second ventilation portion 56. The overall opening area of the group of second through holes 54 is set larger than the opening area of the group of first through holes 53. The shapes of the first through hole 53 and the second through hole 54 can be freely changed to various shapes such as a perfect circle, an ellipse, an elongated hole, and a narrow groove.

  The heat storage unit 57 is formed of a group of plates 59 that are arranged with a gap through which the air for air conditioning passes and that stores and radiates the heat of the air for air conditioning. The plate 59 and the second ventilation portion 56 are made of aluminum or the like having high heat transfer and thermal emissivity. The air for air conditioning passes through the group of plates 59 in a rectifying manner while branching and diffusing and exits from the second through hole 54 of the second ventilation portion 56 to the living space S. The heat of the air for air conditioning is transferred to the group of plates 59 and the second ventilation portion 56, and is radiated to the living space S from the group of plates 59 and the second ventilation portion 56 through the group of the second through holes 54. It

  The first chamber portion 44 and the second chamber portion 45 are formed in a thin box shape, and the first chamber portion 44 and the second chamber portion 45 are provided adjacent to each other in the thickness direction. In the illustrated example, the first chamber portion 44 and the second chamber portion 45 are rectangular flat shapes, but may be changed to various flat shapes such as elongated, square, and round.

  As shown in FIG. 1 and FIG. 3, the controller 11 adjusts the air volume of the air conditioning air to be discharged from the air conditioner 9 to the living space S to increase or decrease, and the heat exchanger 40 exchanges heat with the heat exchange water. Increase or decrease energy. Specifically, the controller 11 is operated to increase / decrease the rotation speed of the air supply fan 41 of the air conditioner 9 and increase / decrease the water flow rate of the heat exchange water of the heat exchanger 40 with the water amount adjusting valve 52. Then, the temperature in the room is adjusted to individually air-condition the plurality of living spaces S. The controller 11 is provided in each room or collectively in one room.

  The present invention is not limited to the above embodiment. For example, the suction port 10, the return air duct 4 and the return air fan 6 may be omitted, and the air heat exchanger 13 of the heat source device 1 may exchange heat between the refrigerant and only the outside air. Furthermore, the outside air inlet portion 48 and the outside air duct 49 of the air conditioner 9 may be omitted, and only the air (return air) in the living space S may be heat-exchanged as air for air conditioning. The air conditioner 9 may be a conventionally known fan coil unit without the radiation unit R.

1 Heat Source Machine 2 Underfloor Storage Section 4 Return Air Duct 8 Exhaust Channel 9 Air Conditioner 12 Water Heat Exchanger 13 Air Heat Exchanger 14 Compressor 15 Heat Pump 30 Vertical Wall 31 Partition 32 Floor 33 Cover 36 Underfloor 49 Outside Air Duct R Radiant unit S Living space

According to the first aspect of the invention, since the heat exchange water is sent from the heat source device to the air conditioner in each room via the water pipe to perform air conditioning, it is not necessary to install an air conditioner for each room and install a refrigerant pipe. Since the heat pump has the water heat exchanger, the air heat exchanger, and the compressor integrated, there is no refrigerant leakage, and there is no decrease in cooling and heating capacity due to an increase in the refrigerant pipe length. Since the heat source machine is stored in the dead space under the floor, the living space is not wastefully limited. Since it is stored under the floor, noise from the heat source machine can be prevented from leaking and there is no inconvenience to the neighborhood. Since the air in the living space with a high exergy is used as the air for the heat source of the heat source unit, the defrost operation of the heat source unit can be reduced and the efficiency of adjusting the temperature of the heat exchange water can be improved.

According to the invention of claim 2, the floor under housing portion may construction is simple cost because it utilizes the bed of the housing foundation and the room. It is convenient to open and close the lid to easily maintain and inspect the heat source unit and other parts.

According to the third aspect of the invention, underfloor ventilation can be performed by exhausting the air that has undergone heat exchange by the air heat exchanger of the heat source device to the outside through the exhaust passage. Further, when the air in the living space is used as the air for the heat source of the heat source machine, ventilation in the living space and under the floor can be performed at the same time. Moreover, the cost can be reduced without separately installing a ventilation device.
According to the invention of claim 4 , outside air of the living space can be cooled by using the air conditioner.
According to the invention of claim 5 , comfortable air conditioning without draft feeling and temperature unevenness can be performed by the action of heat radiation of the radiation unit of the air conditioner.

Claims (6)

  An air conditioner (9) for exchanging heat between the heat exchange water and the air for air conditioning to output the air for air conditioning to the living space (S), and water for exchanging heat between the water for heat exchange and the air for heat source through a refrigerant. A heat source unit (1) having a heat pump (15) in which a heat exchanger (12), an air heat exchanger (13) and a compressor (14) are integrated, and an underfloor storage in which the heat source unit (1) is installed. A residential air conditioner comprising a section (2) and a water pipe (3) for circulating the heat exchange water in the heat source unit (1) and the air conditioner (9).   A return air duct (4) for sending the air in the living space (S) to the underfloor storage (2) so as to be used as the air for the heat source for exchanging heat with the air heat exchanger (13) of the heat pump (15). ) The residential air conditioner according to claim 1, further comprising:   The underfloor storage section (2) is a partition section (31) surrounded by a vertical wall (30) of a part of a housing foundation, a floor section (32) above the partition section (31), and the floor section. The residential air according to claim 1 or 2, further comprising: a lid portion (33) which is provided in the (32) and is opened and closed for maintenance and inspection of the heat source device (1) of the underfloor storage portion (2). Harmony device.   An exhaust passage (8) for discharging the air, which has been heat-exchanged by the air heat exchanger (13) of the heat source unit (1), from the underfloor storage section (2) through the underfloor (36) to the outdoors. Item 5. The residential air conditioner according to any one of items 1 to 3.   The residential air conditioner according to claim 4, further comprising an outside air duct (49) for taking in outside air from the outside to the air conditioner (9).   The air conditioner (9) comprises a radiation unit (R) that radiates the heat of the air for air conditioning while emitting the air for air conditioning to the living space (S). Residential air conditioner.

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