JP2004020036A - Heating-cooling appliance for house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save energy without reducing heating effect by the outside temperature at the time of heating. <P>SOLUTION: This heating-cooling appliance is provided with a first air-side heat exchanger 3 having condensing function for condensating the refrigerant in a power driving type heat pump 1 for a cooling operation, a second air-side heat exchanger 4 having evaporating function for evaporating the refrigerant in the heat pump 1 for a heating operation, a water side heat exchanger 5 exchanging heat between the refrigerant of the heat pump 1 and water to form hot and cold water, and a piping part 8 leading the hot and cold water of the water side heat exchanger 5 to heat transfer parts 23, 32 and 33. The second air-side heat exchanger 4 is set in a room having a temperature higher than a temperature of the outside air. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a residential air conditioner that is installed in a general house to perform indoor air conditioning.
[0002]
[Prior art]
Generally, there is a heat pump type air conditioner as a residential air conditioner. This air conditioner installs an outdoor unit on a veranda, balcony, etc., and absorbs indoor heat during cooling to carry heat into the air, while absorbing air heat during heating and carries it into the room during heating. By doing so, cooling and heating are performed.
[0003]
In addition, there is a gas hot water cooling / heating system as a home cooling / heating device. In this gas hot water cooling and heating system, a large gas boiler is installed on a veranda, balcony, etc., and the hot water obtained by this gas boiler is sent to the hot water around the water by a circulating pump and to the air conditioner in each room to perform heating and dehumidification. ing.
[0004]
[Problems to be solved by the invention]
However, in the above-described heat pump type cooling and heating device, when the outside air temperature is 0 ° C. or less during heating in a cold region, the refrigerant is less likely to evaporate in the evaporator. That is, if the refrigerant does not evaporate into low-pressure gas, it becomes difficult to compress the refrigerant by the compressor. Therefore, there is a problem that the heat pump efficiency is remarkably reduced and the heating effect is reduced.
[0005]
In addition, the gas hot water cooling and heating system uses gas as a power source, which is not preferable for environmental pollution and safety, and has a short service life of 7 to 10 years in consideration of the safety of a large gas boiler. Therefore, there is a problem that running cost is high and energy cost as a power source is high.
[0006]
The present invention has been made in view of the above-described circumstances, and has as its object to provide an energy-saving residential air-conditioning apparatus that does not lower the heating effect due to outside air temperature during heating.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present invention provides a first air-side heat exchanger having a condensing function of condensing a refrigerant of a power-driven heat pump during a cooling operation, and the first air-side heat exchanger during a heating operation. A second air-side heat exchanger having an evaporation function of evaporating the refrigerant of the heat pump, a water-side heat exchanger that exchanges heat between the refrigerant of the heat pump and water to produce cold and hot water, and a water-side heat exchanger. And a pipe section for guiding cold and hot water to the heat transfer section, wherein the second air-side heat exchanger is installed in a room whose temperature is higher than the outside air temperature.
[0008]
According to the first aspect of the present invention, the second air-side heat exchanger having an evaporating function for evaporating the refrigerant of the heat pump during the heating operation is installed in a room whose temperature is higher than the outside air temperature. A favorable heating effect can be obtained without lowering the heating effect due to the temperature. In addition, by using a power-driven heat pump, safety can be increased, the service life can be increased, and running costs and energy costs can be reduced without polluting the environment.
[0009]
According to a second aspect of the present invention, in the residential air conditioner according to the first aspect, a header is inserted in the middle of the pipe portion, a plurality of branch pipes are branched from the header, and the heat transfer sections are respectively provided to these branch pipes. Is connected.
[0010]
According to the invention as set forth in claim 2, a header is inserted in the middle of the pipe section, a plurality of branch pipes are branched from the header, and a heat transfer section is connected to each of the branch pipes. Thus, the flow rate and temperature of the cold and hot water can be made uniform, and a constant cooling and heating effect can always be obtained.
[0011]
According to a third aspect of the present invention, in the cooling and heating apparatus for a house according to the first or second aspect, the branch pipe is a seamless pipe.
[0012]
According to the third aspect of the present invention, since the branch pipe is a seamless pipe, a water leakage accident can be prevented beforehand, and the resistance of the flow of cold and hot water can be reduced.
[0013]
According to a fourth aspect of the present invention, in the residential air conditioner of the second aspect, the header and each of the branch pipes are connected via a flare type pipe joint.
[0014]
According to the fourth aspect of the present invention, the header and each branch pipe are connected via the flared pipe joint, so that the pipe work can be simplified.
[0015]
According to a fifth aspect of the present invention, in the cooling and heating apparatus for a house according to the first aspect, the second air-side heat exchanger is installed in an attic space.
[0016]
According to the fifth aspect of the present invention, since the second air-side heat exchanger is installed in the attic space, the temperature of the attic is at least several tens of degrees higher than the outside air temperature when heating in a cold region, The refrigerant easily evaporates in the vessel, and a desired heating effect can be obtained without lowering the heat pump efficiency.
[0017]
According to a sixth aspect of the present invention, in the residential air conditioner of the first or second aspect, the heat transfer section is a fan coil unit or a floor heating panel.
[0018]
According to the invention as set forth in claim 6, since the heat transfer section is a fan coil unit and a floor heating panel, it is possible to obtain a desired cooling and heating effect in a room. That is, by guiding the hot and cold water to the fan coil unit and the hot water to the floor heating panel, ideal cooling and heating can be performed without becoming too hot during the heating operation and without being too cold during the cooling operation.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0020]
FIG. 1 is a piping diagram showing an embodiment of a residential air conditioner according to the present invention, FIG. 2 is an exploded view showing a connection form between a fan coil unit and a branch piping from a header in FIG. 1, and FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is an air-conditioning system diagram which shows one Embodiment of the cooling and heating apparatus for houses concerning.
[0021]
As shown in FIG. 1, a heat pump chiller 1 as a heat pump has a compressor 2 installed outdoors and driven by electric power to compress a refrigerant, and the compressor 2 has a condensation function of condensing the refrigerant during a cooling operation. , An air-side heat exchanger (second air-side heat exchanger) 4 having an evaporation function for evaporating the refrigerant during the heating operation, and a refrigerant. And a water-side heat exchanger 5 for exchanging heat with water to make cold and hot water.
[0022]
The air-side heat exchanger 3 and the water-side heat exchanger 5 are installed in the heat pump chiller 1, while the air-side heat exchanger 4 is installed in a room having a high temperature with respect to the outside air temperature, for example, in the attic space 6. Have been.
[0023]
A four-way valve 7 is interposed between the compressor 2 and the air-side heat exchanger 3 and the air-side heat exchanger 4. By switching the four-way valve 7, the compressor 2 becomes high temperature and high pressure during the cooling operation. The compressed refrigerant is condensed by the air-side heat exchanger 3, the low-pressure liquid refrigerant is evaporated by the water-side heat exchanger 5, converted into cold water, and the refrigerant returns to the compressor 2. In the heating operation, the refrigerant compressed to a high temperature and a high pressure by the compressor 2 is condensed by the water-side heat exchanger 5 and converted into hot water, and the refrigerant is evaporated by the air-side heat exchanger 4 (the inside of the attic space 6 has a high temperature). , And easily return to the compressor 2.
[0024]
The water-side heat exchanger 5 is interposed between the compressor 2 and the air-side heat exchanger 3 and the air-side heat exchanger 4. By switching the four-way valve 7, the air-side heat exchanger 3 is operated during the cooling operation. The refrigerant condensed by the compressor is supplied, and the refrigerant exchanges heat with the circulating water circulating indoors in the water-side heat exchanger 5 to make the circulating water cold, while the refrigerant compressed by the compressor 2 is supplied during the heating operation, and The side heat exchanger 5 exchanges heat with the circulating water to make the circulating water warm.
[0025]
The water-side heat exchanger 5 is connected to one end of an outgoing pipe 8 and one end of a return pipe 9 as a pipe section made of a coated copper pipe having a diameter of 32 A in order to circulate the circulating water that has become the cold water or the hot water. The other ends of the going pipe 8 and the returning pipe 9 are connected to a going header 10 and a returning header 11 on the fan coil unit side, respectively. The outgoing pipe 8 and the return pipe 9 are respectively branched from the middle and connected to the outgoing header 12 and the return header 13 on the floor heating side.
[0026]
Here, the outgoing header 10 and the return header 11 on the fan coil unit side are respectively disposed in, for example, a space under the ceiling 14, while the outgoing header 12 and the return header 13 on the floor heating side are respectively disposed in, for example, the underfloor space 15. Be placed.
[0027]
Further, anti-vibration flexible pipes 16 and 17 are interposed in the vicinity of the water-side heat exchanger 5 of the outgoing pipe 8 and the return pipe 9, respectively. The cooling pump 18 is inserted, and the circulation pump 18 is driven to circulate the cold and hot water heat-exchanged by the water-side heat exchanger 5. Further, the outgoing pipe 8 on the downstream side of the vibration-proof flexible pipe 16 is branched, and the pressurizing pump 20 and the on-off valve 21 are connected to the branch pipe 19. By opening, the circulating water is supplied.
[0028]
The forward header 10 and the return header 11 are each connected to a plurality of one ends of a branch pipe 22 made of a coated annealed copper pipe having a diameter of 15.88 mm, and the branch pipe 22 is a seamless pipe formed by bending a copper pipe. The other end is connected to a fan coil unit 23 as a heat transfer unit, which is disposed in the under-ceiling space 14 as a plurality.
[0029]
That is, each branch pipe 22 is connected to a fan coil unit 23 via a flared pipe joint 24 as shown in FIG. 2, and the flare pipe joint 24 is connected to the fan coil unit 23 of each branch pipe 22. A widening portion 22a having a conical expanded end, a tightening bolt 25 attached to each branch pipe 22 and having an internal thread formed on an inner peripheral surface thereof, and a coupling having one end joined to the widening portion 22a It has a tube 26 and a female screw portion 23a of the fan coil unit 23 connected to the other end of the coupling tube 26. The coupling pipe 26 includes a joining portion 27 that joins the enlarged portion 22 a of each branch pipe 22, a hexagonally-shaped bolt portion 28 formed on a substantially central peripheral surface of the shaft portion, and engraved on both ends of the bolt portion 28. Male screw portions 29 and 30 formed.
[0030]
In order to connect the branch pipes 22 to the fan coil unit 23 via the flared pipe joint 24 configured as described above, a seal tape (not shown) is wound around the male screw portions 29 and 30 of the coupling pipe 26, respectively. The male screw 30 is screwed into the female screw 23 a of the fan coil unit 23 by rotating the bolt 28 of the coupling tube 26.
[0031]
Next, after joining the expanded portion 22a of each branch pipe 22 to the joining portion 27 of the coupling pipe 26, the female screw 29 is screwed into the male screw portion 29 and tightened to complete the connection work.
[0032]
On the other hand, as shown in FIG. 1, a plurality of branch pipes 31 each made of a 12.7 mm diameter smoothed copper pipe are connected to the forward header 12 and the return header 13 on the floor heating side, respectively. A seamless pipe in which annealed copper pipe is bent and disposed is used, and each other end is connected to a floor heating panel 32 as a heat transfer section and a polyethylene meandering section 33 arranged in the underfloor space 15 as a plurality. I have. The meandering part 33 is connected to the branch pipe 31 via a union joint (not shown), and hot water is supplied to the meandering part 33 and used as it is as floor heating.
[0033]
An electromagnetic valve 34 is inserted in each of the branch pipes 31 connected to the outgoing header 12 side. When floor heating is not required, these electromagnetic valves 34 are closed, and the outgoing header 12 side is closed. Prevent circulating water from flowing through the connected branch pipe 31.
[0034]
Next, an air conditioning system of the present embodiment will be described with reference to FIG.
[0035]
An inlet 35 for taking in fresh air and a discharge outlet 36 for discharging indoor dirty air to the outside are attached to the wall of the house, respectively, and one end of an intake duct 37 is connected to the intake 35. , A filter 38 is inserted, and the other end is connected to a total heat ventilation fan 39. The other end of the exhaust duct 40 whose one end is connected to the discharge port 36 is also connected to the total heat ventilation fan 39.
[0036]
One end of an intake duct 41 and one end of a supply duct 42 are connected to the total heat ventilation fan 39, and an intake port 43 provided at the other end of the intake duct 41 faces the room. A fan 44 is provided in the supply duct 42, and the other end is connected to the chamber box 45.
[0037]
One end of each of six exhaust ducts 46 is connected to the chamber box 45, and the other two ends of these exhaust ducts 46 are connected to the fan coil unit 23, respectively, while the other four ends are connected to the four other ends. An exhaust port 47 for supplying outside air directly into the room is provided. Each fan coil unit 23 is supplied with the cold / hot water whose heat has been exchanged by the water-side heat exchanger 5 as described above, and the cool air or hot air heat exchanged by the cold / hot water is supplied to each fan coil unit 23. It is blown into the room from the outlet.
[0038]
In the air-conditioning system configured as described above, when the fan 44 is driven, fresh air is taken in from the intake port 35, the fresh air passes through the intake duct 37, and dust and the like are removed by the filter 38. It is supplied to the chamber box 45 via the supply duct 39 and the supply duct 42.
[0039]
The fresh air supplied to the chamber box 45 passes through four exhaust ducts 46 and is directly exhausted into the room from each exhaust port 48, and also passes through the two exhaust ducts 46 and from the water-side heat exchanger 5 The supplied cold and hot water exchanges heat with cold or hot air, and is blown out from the outlet of each fan coil unit 23.
[0040]
Next, the operation of the present embodiment will be described.
[0041]
During the cooling operation, the refrigerant condensed by the air-side heat exchanger 3 evaporates in the water-side heat exchanger 5 and becomes cold water. This chilled water is supplied to the going header 10 via the going pipe 8 by driving the circulation pump 18. Next, the cold water supplied to the outgoing header 10 is branched by a plurality of branch pipes 22 arranged in the space 14 above the ceiling and supplied to each fan coil unit 23.
[0042]
The outside air is supplied to each fan coil unit 23 by the air conditioning system shown in FIG. 3, and the outside air is heat-exchanged by the cold water to become cool air, and the cool air flows into the room from the outlet of each fan coil unit 23. It is blown out and cooling is performed.
[0043]
Further, the circulating water heated by the heat exchange in each fan coil unit 23 is returned to the return header 11 through the plurality of branch pipes 22, and then from the return header 11, the water-side heat exchange is performed through the return pipe 9. Returning to the vessel 5, it is cooled again and circulates indoors in the same manner as above.
[0044]
At the time of cooling, the electromagnetic valve 34 inserted in the floor heating branch pipe 31 is closed so that circulating water does not flow through the branch pipe 31.
[0045]
On the other hand, during the heating operation, the refrigerant compressed by the compressor 2 is supplied to the water-side heat exchanger 5, and exchanges heat with circulating water circulating indoors to make the circulating water warm. The hot water is supplied to the outgoing headers 10 and 12 via the outgoing pipe 8 by driving the circulation pump 18. Next, the hot water supplied to the outgoing header 10 is branched by a plurality of branch pipes 22 and supplied to each fan coil unit 23. The hot water supplied to the outgoing header 12 is branched by a plurality of branch pipes 31 and supplied to a plurality of floor heating panels 32 and meandering parts 33 arranged in the underfloor space 15.
[0046]
Then, the warm water supplied to the floor heating panel 32 and the meandering section 33 heats each room, and the circulating water that has undergone heat exchange is returned to the return header 13 through the plurality of branch pipes 31 and then returned to the return header 13. From the header 13, it returns to the water side heat exchanger 5 via the return pipe 9, is made hot water again, and circulates indoors in the same manner as described above.
[0047]
As described above, according to the present embodiment, the air-side heat exchanger 4 having an evaporating function of evaporating the refrigerant of the heat pump chiller 1 during the heating operation is installed in the attic space 6 having a high temperature with respect to the outside air temperature. A favorable heating effect can be obtained without the heating effect being reduced by the outside air temperature during heating. In addition, by using the power-driven heat pump chiller 1, safety can be increased, the service life can be increased, and running costs and energy costs can be reduced without polluting the environment.
[0048]
Further, according to this embodiment, the outgoing header 10 and the return header 11 on the fan coil unit 23 side and the outgoing header 12 and the return header 13 on the floor heating side are inserted in the way of the outgoing pipe 8 and the return pipe 9, respectively. The header 10 and the return header 11 are branched into a plurality of branch pipes 22, and the outgoing header 12 and the return header 13 are branched into a plurality of branch pipes 31. The branch pipe 22 is provided with a fan coil unit 23 as a heat transfer section. By connecting the floor heating panel 32 and the meandering part 33 to 31, respectively, the flow rate and temperature of the cold and hot water to the fan coil unit 23 can be made uniform, and the flow rate and temperature of the hot water to the floor heating panel 32 and the meandering part 33 can be improved. And a constant cooling and heating effect can always be obtained.
[0049]
Furthermore, according to this embodiment, since at least the branch pipes 22 and 31 are seamless pipes, a water leakage accident can be prevented beforehand, and the resistance of the flow of cold and hot water can be reduced.
[0050]
According to the present embodiment, the piping work is simplified by connecting the forward header 10 and the return header 11 on the fan coil unit 23 side and each branch pipe 22 via the flared pipe joint 24. Can be.
[0051]
According to this embodiment, since the air-side heat exchanger 4 is installed in the attic space 6, the temperature of the attic is at least several tens of degrees higher than the outside air temperature during heating in a cold region. Evaporation is facilitated, and a desired heating effect can be obtained without lowering the heat pump efficiency.
[0052]
In addition, by guiding cold and hot water to the fan coil unit 23 as a heat transfer unit and hot water to the floor heating panel 32, it is possible to achieve ideal cooling and heating without excessively hot during the heating operation and not too cold during the cooling operation. It can be performed.
[0053]
It should be noted that the present invention is not limited to the above embodiment, and various changes can be made. For example, in the above-described embodiment, cold and hot water is supplied to each fan coil unit 23 from the water-side heat exchanger 5 through the outgoing pipe 8, the outgoing header 10, and the branch pipe 22, but the present invention is not limited to this. Alternatively, cold and hot water may be supplied directly from the water-side heat exchanger 5 to each fan coil unit 23 via the pipe 8.
[0054]
Similarly, in the present embodiment, the hot water is supplied from the water-side heat exchanger 5 to the floor heating panel 32 and the meandering section 33 through the outgoing pipe 8, the outgoing header 12, and the branch pipe 31. Instead, hot water may be supplied directly from the water-side heat exchanger 5 to the floor heating panel 32 and the meandering part 33 via the pipe 8.
[0055]
However, in order to equalize the flow rate and the temperature of the cold and hot water, it is necessary to cool and cool each fan coil unit 23 from the water side heat exchanger 5 via the outgoing pipe 8, the outgoing header 10 and the branch pipe 22 as in the above embodiment. It is desirable to supply hot water to the floor heating panel 32 and the meandering section 33 via the outgoing pipe 8, the outgoing header 12, and the branch pipe 31 while supplying water.
[0056]
Furthermore, in the above-described embodiment, the air-side heat exchanger 4 used during the heating operation is installed in the attic space 6. However, the present invention is not limited to this, and the air-side heat exchanger 4 may be installed in the ceiling attic space 14. It may be installed in a high room.
[0057]
【The invention's effect】
As described above, according to the present invention, an air-side heat exchanger having an evaporating function for evaporating a refrigerant of a heat pump during a heating operation is installed in a room having a high temperature with respect to the outside air temperature. Thus, a favorable heating effect can be obtained without lowering the heating effect. In addition, by using a power-driven heat pump, safety can be increased, the service life can be increased, and running costs and energy costs can be reduced without polluting the environment.
[Brief description of the drawings]
FIG. 1 is a piping system diagram showing one embodiment of a residential air conditioning system according to the present invention.
FIG. 2 is an exploded view showing a connection form between a fan coil unit and a branch pipe from a header in FIG. 1;
FIG. 3 is an air-conditioning system diagram showing one embodiment of a residential air conditioner according to the present invention.
[Explanation of symbols]
1 heat pump chiller (heat pump)
2 Compressor 3 Air side heat exchanger (first air side heat exchanger)
4. Air side heat exchanger (second air side heat exchanger)
5 Water side heat exchanger 6 Attic space 7 Four-way valve 8 Outgoing piping (piping)
9 Return piping (Piping)
DESCRIPTION OF SYMBOLS 10 Outgoing header 11 Return header 12 Outgoing header 13 Return header 14 Above-the-ceiling space 15 Underfloor space 16 Vibration-proof flexible pipe 17 Vibration-proof flexible pipe 18 Circulation pump 19 Branch pipe 20 Pressurizing pump 21 On-off valve 22 Branch pipe 23 Fan coil unit ( Heat transfer section)
24 Flare type pipe joint 31 Branch pipe 32 Floor heating panel (heat transfer part)
33 Meandering part (heat transfer part)
34 Solenoid valve 35 Inlet 36 Discharge port 37 Intake duct 38 Filter 39 Total heat ventilation fan 40 Exhaust duct 41 Intake duct 42 Supply duct 43 Intake port 44 Fan 45 Chamber box 46 Exhaust duct 47 Exhaust port

Claims (6)

A first air-side heat exchanger having a condensing function of condensing a refrigerant of an electric power driven heat pump during a cooling operation;
A second air-side heat exchanger having an evaporation function of evaporating the refrigerant of the heat pump during a heating operation;
A water-side heat exchanger that exchanges heat between the refrigerant and water of the heat pump to produce cold and hot water,
A pipe section for guiding the cold / hot water of the water-side heat exchanger to a heat transfer section,
Wherein the second air-side heat exchanger is installed in a room whose temperature is higher than the outside air temperature. The residential air conditioner according to claim 1,
A heating and cooling device for a house, wherein a header is inserted in the middle of the pipe section, a plurality of branch pipes are branched from the header, and the heat transfer sections are respectively connected to these branch pipes. The residential air conditioner according to claim 1 or 2,
A cooling and heating device for a house, wherein the branch pipe is a seamless pipe. The residential air conditioning system according to claim 2,
A residential cooling and heating device, wherein the header and each of the branch pipes are connected via a flare type pipe joint. The residential air conditioner according to claim 1,
The second air-side heat exchanger is installed in an attic space. The residential air conditioner according to claim 1 or 2,
The heat transfer unit is a fan coil unit and a floor heating panel.

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