JP3146864U - Waste heat recovery type residential indoor and 1st floor space air conditioning system - Google Patents

Abstract

The present invention provides an air conditioning system for a house that can use a ventilation exhaust heat in a room by a 24-hour ventilation system to dry a humid first floor space and has low initial cost and low running cost.
An air heat exchange unit (10) in which an air heat exchanger for exchanging heat between a blower fan and air / refrigerant is installed in a space below the first floor of a house, while a compressor, a four-way valve, cold / hot water / refrigerant is installed. A water heat exchanger that exchanges heat between them and a water heat exchange unit 20 in which a pressure reducing valve is housed are installed outside the house. The exhaust and air taken in the unit 10 are energized by the blower fan and sent to the air heat exchanger, and hot water after heat exchange by the water heat exchanger is passed through a hot water pipe 64 laid on the floor. The room is heated, and the room is cooled via a fan coil unit 74 in which cold water after heat exchange is installed on the back of the ceiling.
[Selection] Figure 1

Description

  The present invention relates to an air conditioning system for a house, and more particularly to an air conditioning system in a residential room that uses waste heat in the house for heat exchange and an air conditioning system that ventilates the space under the first floor.

  Japanese Laid-Open Patent Publication Nos. 2000-18764 and 2004-31080 disclose a waste heat recovery type air conditioning system for effectively using waste heat in a residential room in an air conditioning system installed in a house.

  The air conditioning system disclosed in Japanese Patent Application Laid-Open No. 2000-1876 is “uses exhausted exhaust heat that is discarded as a heat source for a heat pump when the outside air temperature is low, and has functions of cooling, heating, hot water supply, and ventilation. The purpose of the air conditioning system is to divide the air conditioning system into a duct that takes in ventilation exhaust heat and a duct that draws low-temperature air under the floor, an air chamber that surrounds the outdoor unit of the air conditioner, an insulated hot water storage tank, and a conventional air conditioner air conditioning function The above-mentioned object is achieved by adopting a “combined valve” configuration.

  In addition, the air conditioning system disclosed in Japanese Patent Application Laid-Open No. 2004-31080 is intended to “provide a ventilation exhaust heat recovery device that can be installed using a relatively small space”. A ventilation heat exchanger that heats the refrigerant circulating in the refrigerant pipe by absorbing heat from the ventilation exhaust flowing through the ventilation pipe, and a ventilation heat exchanger A heat pump unit provided separately from the exchanger and connected to the refrigerant pipe and recovering heat from the refrigerant heated by the ventilation heat exchanger, and heated by the heat pump heat exchanger provided in the heat pump unit Is circulated in the hot water piping by a circulation pump and the hot air is sent out from the convector.

By the way, in recent residences, the use of aluminum sashes has increased the degree of indoor sealing, while building materials, furniture, daily necessities, and the like use volatile organic compounds such as formaldehyde and VOC (indoor chemical substances). Therefore, as a measure against “sick houses” using organic compounds such as formaldehyde and VOC, the amendment of the Building Standards Act in July 2003 requires the restriction of interior finishing and the installation of ventilation equipment. As a mandatory installation of ventilation equipment, it is necessary to install mechanical ventilation equipment (so-called 24-hour ventilation system) having a ventilation frequency of 0.5 times / h or more.
Japanese Patent Laid-Open No. 2000-1876 JP 2004-317080 A

However, in the air conditioning system disclosed in Japanese Patent Application Laid-Open No. 2000-1876, “an open / close lid for an underfloor communicating with the underfloor and an external open / close lid that draws a ventilation exhaust heat duct from the room into a known air conditioner outdoor unit and takes in outside air” There is an air chamber that is insulated and kept warm, and the exhaust heat part of the outdoor unit is exposed to the outside and surrounded by the air chamber, and the ventilation exhaust heat duct is simply drawn into the insulated and insulated air chamber. It is not disclosed whether indoor ventilation waste heat is sent by such means, and it is considered that simply providing an underfloor opening / closing lid does not lead to forced ventilation under the floor.
And according to the applicant's knowledge, in the air conditioning system disclosed in Japanese Patent Application Laid-Open No. 2004-317080, the ventilation heat exchanger is integrally provided in close contact with the exhaust port of the ventilation fan, so the pressure loss increases, There is a problem that the capacity of the ventilation fan used in this system must be larger than that of the ventilation fan used in the 24-hour ventilation system described above. The air conditioning system is intended for “heating”, but if used for “cooling”, the temperature difference between the outside air and the room at the time of cooling is at most about 10 ° C. There is a problem that the absolute amount of exchange heat is insufficient to make a cooling medium for the refrigerant used in the exchanger.

  Therefore, the present invention can be used for air conditioning for homes where the initial cost and running cost are low, which can effectively utilize the ventilation heat exhausted by the 24-hour ventilation system and forcibly ventilate the humid first floor space. An object of the present invention is to provide an air conditioning system capable of extending the life of a house.

To achieve the above object, a waste heat recovery type residential room and first floor underfloor air conditioning system according to claim 1 of the present application is installed in a first floor underfloor space in which a sirocco fan and an air heat exchanger are accommodated. An air heat exchange unit, a compressor, a four-way valve, a water heat exchanger, and a pressure reducing valve are housed in the water heat exchange unit installed outside the house, and the indoor air installed in the house is ventilated for 24 hours. A ventilation fan, an exhaust duct connecting the exhaust side of the ventilation fan and the intake side of the sirocco fan, a first refrigerant circulation line connecting the four-way valve and the air heat exchanger, and the pressure reducing valve A second refrigerant circulation line connecting the air heat exchanger and the water heat exchanger via the first communication pipe, a first communication pipe connecting the water heat exchanger and the four-way valve, and the compressor A second communication pipe connecting the suction side of the compressor and the four-way valve, and a discharge of the compressor A third connecting pipe connecting the side and the four-way valve, and a forward pipe and a return pipe connecting the water heat exchanger and an indoor heater and / or an indoor cooler installed in the house. And a cold / hot water circulation pipe through which cold water and / or hot water circulates by a circulation pump interposed in the circulation pipe, and an intake side of the sirocco fan is surrounded by an air chamber, The exhaust duct opens into the air chamber, and an electric shutter that opens into the first floor floor space is fitted on the wall surface of the air chamber. The air heat exchanger is installed on the air supply side of the sirocco fan, and the air heat exchanger is located outside the house on the opposite side of the sirocco fan. A communicating exhaust passage is connected, By switching, the compressor, the water heat exchanger, the first refrigerant circulation line and the second communication pipe, and the first communication pipe and the third communication pipe are connected during the heating operation. The pressure reducing valve, the air heat exchanger and the compressor are connected in this order to form a refrigerant circulation line through which the refrigerant circulates, and during the cooling operation, the first refrigerant circulation line and the third communication pipe, and By connecting the first connecting pipe and the second connecting pipe, the compressor, the air heat exchanger, the pressure reducing valve, the water heat exchanger, and the compressor are connected in this order to form a refrigerant. A refrigerant circulation pipe is circulated, and the cold / hot water circulation pipes are a separate system of a cold water circulation pipe and a hot water circulation pipe, respectively, and the indoor air conditioner is installed on the ceiling of the house. The base end is connected to the fan coil unit and the tip is opened in each room. The fan coil unit is connected to the cold water circulation pipe, and the indoor heater is a hot water pipe meanderingly installed in the floor of the house, the hot water pipe being It is connected to the hot water circulation conduit.
Further, the waste heat recovery type residential room and the first floor underfloor air conditioning system according to claim 2 of the present application are the waste heat recovery type residential room and the first floor underfloor space air conditioning system according to claim 1, Air conditioning by the air conditioner and the indoor heater is intended for all rooms in the house.
The waste heat recovery type residential room and first floor underfloor air conditioning system according to claim 3 of the present application is the waste heat recovery type residential room and first floor underfloor space air conditioning system according to claim 1 or 2. An electric three-way shutter is interposed in the middle of the exhaust duct, and a ventilation duct that opens to the outside of the house branches off from the electric three-way shutter.
Furthermore, the waste heat recovery type residential indoor and first floor underfloor air conditioning system according to claim 4 of the present application is the waste heat recovery type residential indoor and first floor underfloor air conditioning according to any one of claims 1 to 3. A system,
Further, the waste heat recovery type residential room and the first floor underfloor air conditioning system according to claim 5 of the present application are the waste heat recovery type residential room and the first floor underfloor space air conditioning system according to claim 4, wherein The temperature is approximately + 2 ° C.

The present invention has the following effects by the above configuration.
(1) In the present invention, a so-called outdoor unit includes an air heat exchange unit that houses a blower fan and an air heat exchanger, and a water heat exchange unit that houses a compressor, a four-way valve, a water heat exchanger, and a pressure reducing valve. The air heat exchange unit is installed in the space under the first floor, and the water heat exchange unit is installed outside the house. For this reason, both an air heat exchange unit and a water heat exchange unit can be collected compactly, and it can be set as the shape which can install an air heat exchange unit in a very narrow 1st floor underfloor space.
(2) The air heat exchange unit installed in the space under the first floor is configured in the order of an air chamber surrounding the blower fan, a blower fan, an air heat exchanger, and an exhaust passage, and the exhaust communicating with the ventilation fan in this air chamber While the duct opens, an electric shutter that opens into the first floor floor space is fitted on the wall surface of the air chamber. For this reason, the indoor waste heat sent from the “ventilating fan that ventilates for 24 hours”, which is a mechanical ventilation facility with a ventilation rate of 0.5 times / h or more, which is obligated to be installed, is Since it is sent to the exchanger, there is little pressure loss in the exhaust duct as a load of the ventilation fan, and the ventilation fan used in the 24-hour ventilation system can be used as it is, and the initial cost is low.
(3) When this blower fan is a sirocco fan, unlike the axial fan, air convection does not occur in the air chamber, and the air in the air chamber is efficiently sent to the air heat exchanger without waste. Used for heat exchange with refrigerant.
(4) The air in the space below the first floor is forcibly taken into the air chamber via an electric shutter fitted to the wall surface of the air chamber, and is further discharged to the outdoors via the exhaust passage. . In general, the air in the first floor floor space changes less than the outside air, is warmer than the outside air in the winter, and cooler than the outside air in the summer, so refrigerant is used rather than using the outside air as the heat exchange medium of the air heat exchanger. High efficiency of heat exchange for vaporization and liquefaction. In particular, during heating, the average temperature in Utsunomiya City, for example, is -4.5 ° C in January and -3.4 ° C in February. Since it is higher than about 20 ° C., the vaporization efficiency of the refrigerant is high and the running cost is low.
Furthermore, by taking the air in the first floor underfloor space into the air chamber, the air in the first floor underfloor space is convected and the first floor underfloor space can be dried.
(5) The chilled / hot water circulation pipes are made into separate chilled water circulation pipes and hot water circulation pipes, respectively, and are composed of a fan coil unit installed behind the ceiling or indoors and an air supply duct connected to the fan coil unit. By connecting a cold water circulation line to the indoor air conditioner and connecting the hot water circulation line to an indoor heater consisting of hot water pipes meandering in the floor of the house, it is possible to efficiently cool and heat the room. It can be performed. In particular, since the hot water pipe of the indoor heater is heat-exchanged by water heat exchange and uses the hot water as it is, the heating efficiency is high.
(6) Since the ventilation duct that opens to the outside of the house branches off from the electric three-way shutter interposed in the middle part of the exhaust duct, the air conditioning system according to the present invention is not used for cooling or heating. If not used for ventilating the underfloor space, the ventilation fan can simply be used as a 24-hour ventilation system.
(7) If a temperature sensor is installed in the first floor underfloor space, and the temperature sensor causes the temperature of the first floor underfloor space to be approximately + 2 ° C during heating operation, only the waste heat in the room is used for heat exchange with the refrigerant. Since it is used, the refrigerant can be efficiently vaporized. The “substantially + 2 ° C.” is based on the applicant's knowledge obtained through a verification experiment described later, and is a numerical value in the range of (+ 2 ± 0.4) ° C., although it varies somewhat depending on the installation environment.
(8) The present invention performs exhaust by the power of a ventilation fan and uses natural ventilation as the supply air. Instead of the forced air supply method (first type ventilation), it is a centralized exhaust method (third type ventilation). . Therefore, dust and mold in the open air that cause allergies are not released indoors, from exhaust gas, which is considered a demerit of the heat exchange system used in Type 1 ventilation, to odors and chemical substances along with heat. There is no risk of mixing contaminated air with fresh air. Also, in terms of cost, according to the applicant's estimation, the cost at the beginning of installation is approximately 0.7 times the first type ventilation, and the power consumption corresponding to the running cost is also the first type ventilation. Since the electric power to collect is also required, it becomes larger than the third type ventilation.
(9) In addition, since the present invention is intended for heating and cooling the entire interior of the house, partial condensation in the house may occur when a non-heating room or a single ventilation fan is installed in the house. In addition, a long life of the house can be achieved, and since the controller for controlling the operation of the waste heat recovery type house interior and the first floor underfloor space air conditioning system can be installed in approximately one place, the equipment configuration of the system itself is simplified. An indoor heater is a hot water pipe laid on the floor of a house. If the fan coil unit and the air supply duct of the indoor air conditioner are embedded in the ceiling, the heater or air conditioner will protrude into the room. It is not installed, and the room is spacious and clean.

An embodiment according to the best mode for carrying out the present invention will be described with reference to FIGS.
FIG. 1 is a layout diagram of the waste heat recovery type residential room and the first floor under-floor air conditioning system according to the embodiment, and FIG. 2 is a waste heat recovery type residential room and the first floor under floor space according to the example. FIG. 2A is a configuration diagram of an air conditioning system, FIG. 2A is a configuration diagram of a waste heat recovery type residential room and a first-floor space air conditioning system according to an embodiment during heating, and FIG. 2B is an implementation during cooling. It is a block diagram of the waste heat recovery type | mold house room which concerns on an example, and a 1st-floor space air conditioning system.

  1 and 2, reference numeral 10 is an air heat exchange unit, reference numeral 11 is a blower fan, reference numeral 12 is an air heat exchanger, reference numeral 13 is an air chamber, reference numeral 14 is an electric shutter, reference numeral 15 is an exhaust passage, reference numeral 20 is Water heat exchange unit, numeral 21 is a compressor, numeral 22 is a four-way valve, numeral 23 is a water heat exchanger, numeral 24 is a pressure reducing valve, numeral 26 is a circulation pump, numeral 31 is a ventilation fan, numeral 32 is an exhaust duct, numeral Reference numeral 33 denotes an intake duct, reference numeral 34 denotes a ventilation duct, reference numeral 35 denotes an electric three-way shutter, reference numeral 36 denotes an intake hole, reference numeral 41 denotes a first connecting pipe, reference numeral 42 denotes a second connecting pipe, and reference numeral 43 denotes a third connection. Reference numeral 51 denotes a first refrigerant circulation pipe, reference numeral 52 denotes a second refrigerant circulation pipe, reference numeral 61 denotes a cold / hot water shared circulation pipe, reference numeral 62 denotes a hot water circulation pipe, reference numeral 64 denotes a hot water pipe, reference numeral 71. Is the cold water circulation pipe, 72 is the three Valve, reference numeral 74 is a fan coil unit, reference numeral 75 is an air supply duct, reference numeral 76 is an air supply hole, reference numeral 80 is a house, reference numeral 81 is a space under the first floor, reference numerals 82a, 82b, 82c, 82d, 82e, and 82f are chambers, Reference numeral 831 is the first floor ceiling, reference numeral 832 is the second floor ceiling, reference numeral 841 is the first floor, and reference numeral 842 is the second floor.

  First, the configurations of the waste heat recovery type residential room and the first-floor space air conditioning system according to the embodiment will be described. In addition, as shown in FIG. 1, although the waste heat recovery type | mold house room and 1st-floor space air conditioning system which concern on an Example assume the case where it installs in the 2-story house 80 for convenience of explanation. Of course, the present invention is not limited to a two-story house, and can be applied to a one-story house or a three-story house.

  The waste heat recovery type residential room and the first floor underfloor space air conditioning system according to the embodiment are roughly classified into the air heat exchange unit 10 installed in the first floor underfloor space 81 of the house 80 and the outside of the house 80. It is comprised from the water heat exchange unit 20, the ventilation fan 31 installed in 1st floor ceiling 831 back, piping, a duct, etc. which connect these.

The air heat exchange unit 10 is a substantially rectangular parallelepiped housing, and an air heat exchanger 12 is accommodated in the entire cross section in the width direction. An air chamber 13 is formed in front of the air heat exchanger 12, and the two air blowing fans 11 that send air in the air chamber 13 to the air heat exchanger 12 are air heat exchanged in the air chamber 13. It is installed parallel to the surface of the vessel 12. Note that each of the two blower fans 11 uses a sirocco fan that is a multi-blade fan having a large number of small forward blades.
Further, the air chamber 13 is opened with a leading end of an exhaust duct 32 communicating with a ventilation fan 31 to be described later, and an electric shutter 14 is fitted on three wall surfaces. The rear surface of the air heat exchanger 12 is provided with an exhaust passage 15 whose tip communicates with the outside. The air sent by the two blower fans 11 is heated by the air heat exchanger 12 with the refrigerant and heat. After the replacement, the exhaust passage 15 is discharged outside.
And the dimension of the air heat exchange unit 10 in an Example is width 900mm x length 790mm x height 380mm. Note that the width of the air heat exchange unit 10 refers to a direction parallel to the surface of the air heat exchanger 12.

Similarly to the air heat exchange unit 10, the water heat exchange unit 20 is a substantially rectangular parallelepiped housing, and a compressor 21, a four-way valve 22, a water heat exchanger 23, and a pressure reducing valve 24 are accommodated therein. The water heat exchanger 23 and the four-way valve 22 are connected by a first connecting pipe 41, and the suction side of the compressor 21 and the four-way valve 22 are connected by a second connecting pipe 42, and the discharge of the compressor 21 is performed. The side and the four-way valve 22 are connected by a third communication pipe 43. Further, the air heat exchanger 12 and the four-way valve 22 are connected by a first refrigerant circulation line 51, and the water heat exchanger 23 and the air heat exchanger 12 are connected by a second refrigerant circulation line 52. The pressure reducing valve 24 is interposed in the second refrigerant circulation line 52.
By switching the four-way valve 22, the first refrigerant circulation pipe 51 and the second communication pipe 42, and the first communication pipe 41 and the third communication pipe 43 are connected during the heating operation, and the first communication pipe 41 and the third communication pipe 43 are connected during the cooling operation. The first refrigerant circulation pipe 51 and the third communication pipe 43, and the first communication pipe 41 and the second communication pipe 42 are connected.
In addition, the dimension of the water heat exchange unit 20 in an Example is set to width 550 mm x length 250 mm x height 1,010 mm.

As described above, the ventilation fan 31 that ventilates the rooms 82a to 82f throughout the 24 hours is a mechanical ventilation facility that is installed in order to secure a ventilation frequency of 0.5 times / h or more for all the rooms 82a to 82f. And it is installed in the space between the first-floor ceiling 831 and the second-floor floor 842. An intake duct 33 is connected to the intake side of the ventilation fan 31 and an exhaust duct 32 is connected to the exhaust side of the ventilation fan 31. The exhaust duct 32 extends from the horizontal direction to the vertical direction and extends to the air. Opening to the air chamber 13 of the heat exchange unit 10. A branch pipe branched from the intake duct 33 is connected to an intake hole 36 penetrating into the chambers 82a to 82f.
An electric three-way shutter 35 is interposed in a portion where the exhaust duct 32 changes its direction from the horizontal direction to the vertical direction, and a ventilation duct 34 branched from the electric three-way shutter 35 extends in the horizontal direction. The tip is open to the outside of the house 80.

  The indoor heater used in the embodiment is composed of a hot water pipe 64 laid so as to meander to the first floor 841 and the second floor 842, and the hot water comprising a forward pipe and a return pipe is provided in the hot water pipe 64. A circulation line 62 is connected. Further, the hot / warm water circulation line 62 is connected to the cold / hot water common circulation line 61 via the three-way valve 72, and the cold / hot water common circulation line 61 is connected to the hydrothermal exchanger 23 and the cold / hot water common circulation line. A circulation pump 26 is interposed in the path 61.

  The indoor air conditioner used in the embodiment is provided with a fan coil unit 74 installed in the first-floor ceiling 831 and the second-floor ceiling 832, and extends from the fan coil unit 74 so as to be drilled in the ceilings of the respective chambers 82 a to 82 f. And an air supply duct 75 connected to the air supply hole 76. The fan coil unit 74 contains a blower for circulating indoor air, a cold water coil for cooling indoor air, and a dustproof device, and a cold water circulation pipe 71 composed of an outgoing pipe and a return pipe is connected to the cold water coil. Has been. Further, the cold water circulation pipe 71 is connected to the cold / hot water common circulation pipe 61 through the three-way valve 72, and the cold / hot water common circulation pipe 61 is provided with the water heat exchanger 23 and the circulation pump 26.

  Next, a heating system, a cooling system, a first-floor space drying system, and a 24-hour ventilation system that can be performed by the waste heat recovery type residential room and the first-floor space air conditioning system according to the embodiment will be described.

First, the heating system will be described mainly based on FIG.
As described above, by switching the four-way valve 22, the first refrigerant circulation pipe 51 and the second communication pipe 42, and the first communication pipe 41 and the third communication pipe 43 are connected during heating operation. Along the refrigerant flow direction, the compressor 21 → the third communication pipe 43 → the first communication pipe 41 → the water heat exchanger 23 → the second refrigerant circulation line 52 → the pressure reducing valve 24 → the second refrigerant circulation. A refrigerant circulation line consisting of the pipe line 52 → the air heat exchanger 12 → the first refrigerant circulation pipe 51 → the second communication pipe 42 → the compressor 21 is formed.
In the refrigerant circulation line thus formed, the refrigerant is sent to the water heat exchanger 23 as a high-temperature (approximately 90 ° C.) high-pressure gas body by the compressor 21, and the water heat exchanger 23 cools and cools the refrigerant. The refrigerant itself becomes a liquid at approximately 40 ° C. while being heat-exchanged with approximately 40 ° C. warm water flowing through the water shared circulation pipe 61 to be heated at approximately 45 ° C. to 50 ° C. The refrigerant that has become a liquid at about 40 ° C. is depressurized by the pressure reducing valve 24 and is sent to the air heat exchanger 12 as a liquid / gas mixture at −14 ° C. Further, the refrigerant is warmed by heat exchange with air at approximately 23 ° C. in the air heat exchanger 12, and is sent to the compressor 21 as gas at approximately −4 ° C.

By the way, the ventilation fan 31 which ventilates fresh outside air through 24 hours is operating almost constantly, and the warmed air in each of the chambers 82a to 82f passes through the exhaust duct 32 and the air chamber of the air heat exchange unit 10. 13. In the air chamber 13, the electric shutter 14 is opened to take in the air in the first floor underfloor space 81, and the air that is warmed in each room in the air chamber 13 and the air in the first floor underfloor space 81 are mixed. The air fan 11 is energized and sent to the air heat exchanger 12. Then, the air cooled to approximately −4 ° C. by exchanging heat with the refrigerant in the air heat exchanger 12 is discharged to the outside through the exhaust passage 15.
In addition, a temperature sensor (not shown) is installed in the first floor floor space 81. When this temperature sensor senses the temperature of the first floor floor space of approximately 2 ° C. or less, the electric shutter 14 that is always “open” serves as the temperature sensor. In conjunction with this, it is “closed” to block the air in the first floor underfloor space 81 and send only the warmed air in each room to the air heat exchanger 12.

By operating the three-way valve 72, the cold / hot water common circulation pipe 61, the hot water circulation pipe 62, and the hot water pipe 64 are connected, and the circulation pump 26 → the cold / hot water common circulation pipe 61 (forward) along the flow direction of the hot water. Pipe) → water heat exchanger 23 → cold / hot water common circulation line 61 (forward pipe) → three-way valve 72 → hot water circulation pipe 62 (outward pipe) → hot water pipes 64 on the first floor 841 and second floor 842 → hot water A hot water circulation line consisting of the circulation line 62 (return pipe) → the three-way valve 72 → the cold / hot water common circulation line 61 (return pipe) → the circulation pump 26 is formed.
Then, the hot water flows through the hot water circulation line by the operation of the circulation pump 26, and the hot water of about 40 ° C. is heated to about 45 ° C. to 50 ° C. by the water heat exchanger 23, and the first floor 841 and It is sent to the hot water pipe 64 of the second floor 842. The hot water warmed in the indoors 82 a to 82 f by the hot water pipe 64 becomes approximately 40 ° C., and is sent to the water heat exchanger 23 again.
The above is the structure of the heating system performed by the waste heat recovery type residential room and the first floor underfloor space air conditioning system according to the embodiment.

Next, the cooling system will be described mainly based on FIG.
As described above, the switching of the four-way valve 22 connects the first refrigerant circulation pipe 51 and the third communication pipe 43 and the first communication pipe 41 and the second communication pipe 42 during the cooling operation. Along the refrigerant flow direction, the compressor 21 → the third communication pipe 43 → the first refrigerant circulation pipe 51 → the air heat exchanger 12 → the second refrigerant circulation pipe 52 → the pressure reducing valve 24 → the second The refrigerant circulation line consisting of the refrigerant circulation line 52 → the water heat exchanger 23 → the first communication pipe 41 → the second communication pipe 42 → the compressor 21 is formed.
In the refrigerant circulation line formed in this way, the refrigerant becomes a high-temperature (approximately 73 ° C.) high-pressure gas body by the compressor 21 and is sent to the air heat exchanger 12. It is cooled by air at 30 ° C. to become a liquid at about 40 ° C. The refrigerant that has become a liquid at approximately 40 ° C. is depressurized by the pressure reducing valve 24, becomes a liquid at approximately 0 ° C., and is sent to the water heat exchanger 23. While the water heat exchanger 23 exchanges heat with approximately 12 ° C. cold water flowing through the cold / hot water common circulation line 61 to obtain approximately 7 ° C. cold water, the refrigerant itself becomes a gas body of approximately 12 ° C. and the compressor 21. Sent to.

  As described in the “heating system”, the ventilation fan 31 that is operating almost always sends the cooled air in the chambers 82 a to 82 f to the air chamber 13 of the air heat exchange unit 10 through the exhaust duct 32. In the air chamber 13, the electric shutter is opened and air in the first floor underfloor space 81 is taken in, and in the air chamber 13, the cooled air in each room is mixed with air that is cooler than the outside air in the first floor underfloor space 81. The combined air is urged by the blower fan 11 and sent to the air heat exchanger 12. The air that has exchanged heat with the refrigerant in the air heat exchanger 12 is discharged to the outside through the exhaust passage 15.

By operating the three-way valve 72, the cold / hot water common circulation pipe 61, the cold water circulation pipe 71 and the fan coil unit 74 are connected, and along the flow direction of the cold water, the circulation pump 26 → the cold / hot water common circulation pipe 61 ( Outward pipe) → Water heat exchanger 23 → Cooled / hot water common circulation line 61 (outward pipe) → Three-way valve 72 → Cold water circulation pipe 71 (outward pipe) → Fan coil unit in the first-floor ceiling 831 and second-floor ceiling 832 A cold water circulation line is formed by 74 → cold water circulation pipe 71 (return pipe) → three-way valve 72 → cold / hot water common circulation pipe 61 (return pipe) → circulation pump 26.
When the circulation pump 26 is operated, cold water flows through the above-mentioned cold water circulation pipe, and the cold water at approximately 12 ° C. is cooled to approximately 7 ° C. by the water heat exchanger 23, so that the inside of the first-floor ceiling 831 and the second-floor ceiling 832 To the fan coil unit 74. The cold water sent to the fan coil unit 74 passes through the cold water coil in the fan coil unit 74 and is then sent again to the water heat exchanger 23. On the other hand, the indoor air sucked by the blower in the fan coil unit 74 is cooled by the cold water coil, returns to the indoors through the air supply holes 76, and cools the indoors.
The above is the mechanism of the cooling system performed by the waste heat recovery type residential room and the first-floor space air conditioning system according to the embodiment.

Next, the first floor underfloor space drying system and the 24-hour ventilation system will be described.
In the first floor underfloor space drying system, the electric shutter 14 fitted in the air chamber 13 of the air heat exchange unit 10 is “open”, and the air in the first floor underfloor space 81 is sucked by operating the blower fan 11. Then, it is performed by being discharged to the outside through the exhaust passage 15. Therefore, the electric shutter of the air heat exchange unit 10 is used during heating and cooling, except when a temperature sensor (not shown) installed in the first floor underfloor space 81 senses the first floor underfloor space temperature of approximately 2 ° C. or less. 14 is automatically “open” to create an air flow in the first floor underfloor space 81 and dry the first floor underfloor space 81.
In addition, during the time other than air conditioning, drying in the first floor underfloor space 81 is promoted by operating the blower fan 11 with the electric shutter 14 being “open”.

  The 24-hour ventilation system is performed by operating the ventilation fan 31, but as described above, the ventilation fan 31 is always operating during cooling and heating, and thus the 24-hour ventilation system functions effectively. In addition to the time of cooling and heating, the ventilation duct 34 is connected to the exhaust side of the ventilation fan 31 by the operation of the electric three-way shutter 35 interposed in the middle part of the exhaust duct 32 and directly from the ventilation fan 31. The air in each chamber 82a to 82f is exhausted and ventilated.

Here, a demonstration experiment of the waste heat recovery type indoor room and the first floor underfloor space air conditioning system (hereinafter referred to as “waste heat recovery type air conditioning system”) according to the embodiment will be described.
(1) Specifications of main components of waste heat recovery type air conditioning system Specifications of air heat exchanger (manufactured by Sunrise Kogyo Co., Ltd.)
Cooling / heating coil: 3 rows x 12 stages x effective length 720 mm x effective height 270 mm
Number of circuits: 4 circuits Number of paths: 12 paths / 1 circuit Circuit length: 8.6 m / 1 circuit Specifications of water heat exchanger (manufactured by Alfa Laval)
Model: CB26-42H
Heat transfer plate: width 112mm x height 311mm x thickness 110mm
Number of heat transfer plates: 42H
Heat transfer area: 1.0m ²
Sirocco fan specifications (manufactured by Sowa Technica Co., Ltd.)
Model: BFD-18WS ₁
Rated voltage: Single phase 100V
Nominal output: 300W
Compressor specifications (Mitsubishi Electric Corporation)
Model: TE338SEAM2
Compressor type: Rolling piston type rotary fully sealed electric compressor Number of compressor cylinders: 2
Compressor displacement: 33.8 cm ³
Rated output of motor: 1,500W
Refrigerant type: R407C
Performance voltage: 200 rated V

(2) Demonstration experiment of heating system A series of demonstration experiments were conducted in November 2007 with a waste heat recovery air conditioning system installed in a house in Chofu City, Tokyo. A part of the data is shown in FIG.
The data shown in FIG. 3 is from November 2nd, 2007, from 22:00 to 23:00, the horizontal axis is the measurement time (hours / minutes / seconds), and the vertical axis is the temperature (° C.) and The amount of heat (Kcal / h) is used. The hot water inlet and the hot water outlet are the temperatures (° C.) of the circulating hot water at the inlet and outlet of the water heat exchanger, respectively, and the room temperature was set to 20 ° C.

(3) About demonstration experiment of cooling system A series of demonstration experiments were conducted in August 2007 with a waste heat recovery type air conditioning system installed in a house in Utsunomiya City, Tochigi Prefecture. A part of the data is shown in FIG.
The data shown in FIG. 4 is from 16:00 to 14:00 on August 16, 2007, the horizontal axis is the measurement time (hours / minutes / seconds), and the vertical axis is the temperature (° C.) and The amount of heat (Kcal / h) is used. The cold water inlet and the cold water outlet are the temperature (° C.) of the circulating cold water at the inlet and the outlet of the water heat exchanger, respectively, and the room temperature was set to 26 ° C.

In addition, based on the above demonstration experiment, “Annual heating and cooling costs” and “Energy consumption and CO ₂ emissions” were calculated for waste heat recovery air conditioning system, kerosene boiler system and gas boiler system, respectively. .
(1) Type of system to be compared Type of kerosene boiler system: DB-1200F (indoor sealed forced supply / exhaust type: manufactured by Nagafu Seisakusho Co., Ltd.)
Model of gas boiler system: FS-1201BRSW ₂ UN (Outdoor installation type heat source dedicated to heating: manufactured by Tokyo Gas Co., Ltd.)

(2) Annual heating costs estimates annual heating costs and annual cooling costs, heat loss coefficient (in this case the next generation energy saving standard value of approximately Kanto west ^{2.7W / m 2 K (= 2.322kcal} / m 2 K) is multiplied by the heating symmetry area (120 m ² ) to calculate the total heat loss coefficient (2.322 kcal / m ² K × 120 m ² ≈279 kcal / K), and this is the heating degree (1416 ° C / day) ) To calculate the annual heating load (279 kcal / K × 24 h × 1416 ° C./day=9,481,536 kcal / year). Furthermore, the consumption of each fuel is calculated from this annual heating load, and this is multiplied by each fuel cost (Tokyo Electric Power: 22.31 yen / kwh, kerosene: 84 yen, Tokyo Gas: 112.97 yen / m ³ ). Asked.
In addition, since the kerosene boiler system and the gas boiler system are not used for cooling, the annual cooling costs for the waste heat recovery type air conditioning system are 12 days in July when the temperature is 27.8 ° C. or more and the temperature is 29. Calculations were made for 31 days in August at 9 ° C or higher. In the calculation, the cooling load is obtained by adding the conduction load due to the outer wall and the radiation load due to the window glass, and the electric power consumption is calculated from this, and the electricity bill (Tokyo Electric Power: 22.31 yen / kwh) is calculated. It was calculated by multiplying.
The calculation results of the annual heating cost and the annual cooling cost are shown in Table 1. As described above, the kerosene boiler system and the gas boiler system are not used for cooling. The values calculated by the recovery air conditioning system were used as they were.

(3) Estimation energy consumption and CO ₂ emissions from energy consumption and CO ₂ emissions in the heating, the consumption of each fuel during cooling and heating obtained in "estimates annual heating costs and annual cooling expenses" of the In addition, the energy consumption is multiplied by the calorific value of each fuel (electricity: 3.6 MJ / kwh, kerosene: 37 MJ / L, gas (LNG): 45 MJ / m ³ ), and CO ₂ emissions are calculated for each fuel. CO ₂ emission (electricity = 0.368 kg · CO ₂ / kwh, kerosene = 2.51 kg · CO ₂ / L, gas (LNG) = 2.21 kg · CO ₂ / m ³ ) was used for multiplication.
The calculation results of energy consumption and CO ₂ emissions during heating are shown in Table 2. As in Table 1, the kerosene boiler system and the gas boiler system are not used for cooling, so the kerosene boiler system and the gas boiler system As for, the values calculated by the waste heat recovery type air conditioning system were used as they were.

As shown in Table 1, the annual heating and cooling cost of the waste heat recovery type air conditioning system of the present invention is 73.3% of the kerosene boiler system and 56.0% of the gas boiler system.
As shown in Table 2, the energy consumption of the waste heat recovery type air conditioning system of the present invention was reduced by 70.0% compared to the kerosene boiler system, and 68.0% compared to the gas boiler system. % Reduction effect. In addition, the CO ₂ emission amount of the waste heat recovery type air conditioning system of the present invention has a 56.3% reduction effect with respect to the kerosene boiler system and a 38.2% reduction effect with respect to the gas boiler system. .

FIG. 1 is a layout diagram of a waste heat recovery-type residential room and a first-floor space air conditioning system according to an embodiment. FIG. 2 is a configuration diagram of the waste heat recovery type residential room and the first floor underfloor space air conditioning system according to the embodiment, and FIG. FIG. 2B is a configuration diagram of the waste heat recovery type residential room and the first floor underfloor space air conditioning system according to the embodiment during cooling. FIG. 3 is a graph showing a part of actual measurement data during heating of the waste heat recovery type residential room and the first floor underfloor space air conditioning system according to the example. FIG. 4 is a graph showing a part of actual measurement data during cooling of the waste heat recovery type residential room and the first-floor space air conditioning system according to the example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air heat exchange unit 11 Blower fan 12 Air heat exchanger 13 Air chamber 14 Electric shutter 15 Exhaust passage 20 Water heat exchange unit 21 Compressor 22 Four way valve 23 Water heat exchanger 24 Pressure reducing valve 26 Circulation pump 31 Ventilation fan 32 Exhaust duct 34 Ventilation duct 35 Electric three-way shutter 41 First connecting pipe 42 Second connecting pipe 43 Third connecting pipe 51 First refrigerant circulation pipe 52 Second refrigerant circulation pipe 62 Hot water circulation pipe 64 Hot water pipe 71 Cold water circulation pipe 74 Fan coil unit 75 Air supply duct 80 Housing 81 1st floor under floor space

Claims (5)

An air heat exchange unit in which a sirocco fan and an air heat exchanger are housed and installed in the space below the first floor of the house;
A water heat exchange unit in which a compressor, a four-way valve, a water heat exchanger and a pressure reducing valve are housed and installed outside the house;
A ventilation fan installed in the house and ventilating the indoor air for 24 hours;
An exhaust duct connecting the exhaust side of the ventilation fan and the intake side of the sirocco fan;
A first refrigerant circulation line connecting the four-way valve and the air heat exchanger;
A second refrigerant circulation line connecting the air heat exchanger and the water heat exchanger via the pressure reducing valve;
A first connecting pipe connecting the water heat exchanger and the four-way valve;
A second connecting pipe connecting the suction side of the compressor and the four-way valve;
A third connecting pipe connecting the discharge side of the compressor and the four-way valve;
A circulation line composed of an outgoing pipe and a return pipe that connect the water heat exchanger to an indoor heater and / or an indoor cooler installed in the room of the house, and is interposed in the circulation pipe A cold / hot water circulation pipe through which cold water and / or hot water circulates by a circulation pump,
The air intake side of the sirocco fan is surrounded by an air chamber, the exhaust duct opens into the air chamber, and an electric shutter that opens into the space below the first floor is fitted on the wall surface of the air chamber. Is filled only with indoor waste heat and air in the underfloor space sent from the exhaust duct, or the indoor waste heat,
The air heat exchanger is installed on the air supply side of the sirocco fan, and an exhaust passage communicating with the outside of the house is connected to the opposite side of the air heat exchanger to the sirocco fan,
By switching the four-way valve, the first refrigerant circulation line and the second communication pipe, and the first communication pipe and the third communication pipe are connected during heating operation, so that the compressor, the water heat An exchanger, the pressure reducing valve, the air heat exchanger and the compressor are connected in this order to form a refrigerant circulation line through which the refrigerant circulates,
During the cooling operation, the first refrigerant circulation line and the third communication pipe, and the first communication pipe and the second communication pipe are connected, so that the compressor, the air heat exchanger, and the pressure reducing valve are connected. , The water heat exchanger and the compressor are connected in this order to form a refrigerant circulation line through which the refrigerant circulates,
The cold / hot water circulation pipes are respectively different systems of cold water circulation pipes and hot water circulation pipes,
The indoor air conditioner includes a fan coil unit installed behind the ceiling of the house, and an air supply duct whose base end is connected to the fan coil unit and whose front end opens into each room. Connected to the cold water circulation line,
The indoor heater is a hot water pipe meanderingly installed in the floor of the house, and the hot water pipe is connected to the hot water circulation pipe, 1st floor underfloor space air conditioning system.   2. The waste heat recovery type residential room and first-floor space air conditioning system according to claim 1, wherein air conditioning by the indoor air conditioner and the indoor heater is intended for all rooms of the house.   2. An electric three-way shutter is interposed in an intermediate portion of the exhaust duct, and a ventilation duct that opens to the outside of the house branches from the electric three-way shutter. The waste heat recovery type residential room and first floor underfloor air conditioning system according to 2.   A temperature sensor is installed in the first floor floor space, and an electric shutter fitted to the wall surface of the air chamber in conjunction with sensing of the temperature of the first floor floor space below a predetermined temperature by the temperature sensor during heating operation. The waste heat recovery type residential room and the first floor underfloor space air conditioning system according to any one of claims 1 to 3, wherein the air conditioning system is closed.   5. The waste heat recovery type residential room and underfloor space air conditioning system according to claim 4, wherein the predetermined temperature is approximately + 2 ° C.

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