JPH085100A - Air conditioning method and its equipment - Google Patents

Abstract

PURPOSE:To provide an air conditioning method capable of subrtantial energy- saving in an air conditioning method in which an air conditioning area including an interior part and a perimeter part is air-conditioned with an underfloor system. CONSTITUTION:An air conditioning method is provided in which an underfloor air corditioner 17 as an indoor machine and an outdoor machine 19 are provided and an air conditioning area including an interior part and a perimeter part is air-conditioned with an underfloor system. In the method, when the interior part is cooled in winter, hot air is produced in an underfloor space 26 by making use of waste heat of a high temperature high pressure liquid refrigerant discharged from an outdoor machine heat exchanger 3, and the hot air is blown off from a floor blow-off outlet in the perimeter part to heat the perimeter part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-conditioning method and apparatus therefor, and particularly to an air-conditioning method and apparatus suitable for effectively utilizing exhaust heat for air-conditioning or cutting off the influence of outside air to improve thermal efficiency. Regarding

[0002]

2. Description of the Related Art A conventional underfloor type air conditioning technique, that is, an indoor air conditioning system having a floor outlet for blowing conditioned air into a room is shown in FIG.

In the conventional underfloor air conditioning technique shown in FIG. 3, the underfloor air conditioner 17 and the outdoor unit 1 are used.
9, an underfloor space 26, and a floor outlet 23 provided therein.
A rover outlet 24 that blows out conditioned air from the underfloor space 26 to the interior zone through, for example, a partition, an exhaust port 25, an exhaust duct 27, and a duct 29 that connects this to the underfloor air conditioner 17. have.

In this conventional air conditioning technique, the conditioned air blown into the room from the floor outlet 23 and the rover outlet 24 provided in the interior zone is a human body, office automation equipment (hereinafter referred to as "OA equipment"). ), Is absorbed by heat such as solar radiation, and rises toward the ceiling. The air thus raised is exhausted from the exhaust port 25 provided in the ceiling to the exhaust duct 27 in the back of the ceiling.
The air conditioner 17 for the underfloor, which is connected to the duct 29 communicating with the exhaust duct 27 and is installed in the space 28 between the walls, or is abandoned by the air conditioner (not shown) installed in the ceiling. After being treated with heat and dust, it is sucked into the underfloor space 26 through a duct (not shown), and circulates to the floor outlet 23 and the rover outlet 24 again.

FIG. 4 shows a conventional individual system for simultaneous operation of cooling and heating.

In the prior art shown in FIG. 4, the outdoor unit 19
Further, a plurality of sets of the cooling / heating switching unit 30 and the indoor unit 32 are connected in parallel.

The outdoor unit 19 includes a compressor 1, an accumulator 2, two four-way valves 4, two outdoor unit heat exchangers 3, three expansion valves 8 and a receiver 12. It is configured with.

The cooling / heating switching unit 30 includes a solenoid valve 3
One.

Each of the indoor units 32 has an indoor unit heat exchanger 33.
And an expansion valve 34.

A set of the cooling / heating switching unit 30 and the indoor unit 32 includes a liquid refrigerant pipe 35, a liquid refrigerant pipe 35, and a device in the outdoor unit 19.
The gas refrigerant pipe 36 and the high pressure gas refrigerant pipe 37 are connected by three pipes.

A cooling / heating switching unit 30 for switching the flow of the refrigerant by an electromagnetic valve 31 is connected to each of the indoor units 32 in the individually operated air conditioner, and the outdoor unit heat exchanger 3 and the four-way valve 4 are connected to the outdoor unit 19, respectively. Two refrigerant pipes 35, 36 and 37 are provided so that the cooling operation and the heating operation can be simultaneously performed.

[0012]

However, in the conventional underfloor type air conditioning technology, since the perimeter portion is affected by the outside air when the interior portion is cooled in winter by the heat load from the OA equipment or the like, Heating operation becomes necessary. Further, during the cooling operation in the summer, the perimeter portion near the outer wall is affected by the outside air such as the radiant heat of the sun, so that the air conditioning technology for air conditioning the entire indoor area causes uneven air conditioning. In the conventional individual system that simultaneously performs cooling and heating to solve this problem, the refrigerant pipe is
This is required, and the cost of piping work and the cost of piping materials increase, resulting in higher costs.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an air-conditioning method capable of significantly saving energy in an air-conditioning method for air-conditioning an air-conditioned area having an interior section and a perimeter section by an underfloor system. Especially.

Another object of the present invention is to provide an air conditioner capable of accurately implementing the air conditioning method, simplifying the device, and facilitating piping work.

[0015]

The object is to provide an air-conditioning method for air-conditioning an air-conditioned area having an interior unit and an outdoor unit and having an interior section and a perimeter section by an underfloor system, wherein the interior section is cooled in winter. If you want to
To generate hot air in the underfloor space by using the exhaust heat of the high-temperature, high-pressure liquid refrigerant discharged from the outdoor unit heat exchanger, and blow the hot air from the floor of the perimeter to heat the perimeter. Is achieved by

[0016] Further, in the air-conditioning method for air-conditioning an air-conditioned area having an indoor unit and an outdoor unit and having an interior section and a perimeter section by an underfloor system, when the entire room is cooled in summer, This is achieved by introducing a part of the cold air into the underfloor space, blowing the cold air from the floor surface of the perimeter portion toward the ceiling surface, and forming an air curtain on the outer wall side of the perimeter portion.

Further, in the air conditioner for the purpose of air-conditioning an air-conditioned area having an interior unit and an outdoor unit and having an interior section and a perimeter section by an underfloor system, a heat exchanger and a blower are provided in an underfloor space. The exhaust heat absorption air conditioner having the above is installed, and the exhaust heat absorption air conditioner is connected to the liquid refrigerant pipe connecting the outdoor unit heat exchanger and the indoor unit side through the exhaust heat circulation pipe having the partition valve. This is achieved by further providing a joint for exhaust heat circulation pipe connection in advance in the liquid refrigerant pipe connecting the outdoor unit heat exchanger and the indoor unit side.

[0018]

According to the method of the present invention, when the interior part is cooled in winter, the exhaust heat of the high-temperature and high-pressure liquid refrigerant discharged from the outdoor heat exchanger is used to generate hot air in the underfloor space.
And this warm air is blown from the floor of the perimeter,
Heat the perimeter section.

As described above, according to the method of the present invention, since the perimeter portion is heated in the same cycle by utilizing the exhaust heat when the interior portion is cooled in the winter, a separate heat source is not required, and therefore a large amount of heat is required. It is possible to save energy.

Further, in the method of the present invention, when cooling the entire room in summer, a part of the cool air in the room is introduced into the underfloor space. Then, the cold air is blown from the floor surface of the perimeter portion toward the ceiling surface to form an air curtain on the outer wall side of the perimeter portion. As a result, since the air curtain can be formed on the outer wall side of the perimeter portion in the same cycle, a separate heat source is not required and the influence of the outside air can be cut off. As a result, uneven air conditioning can be eliminated and thermal efficiency can be improved.

Further, in the device of the present invention, an exhaust heat absorbing air conditioner having a heat exchanger and a blower is installed in the underfloor space. The exhaust heat absorbing air conditioner is connected to a liquid refrigerant pipe connecting the outdoor unit heat exchanger and the indoor unit side via an exhaust heat circulation pipe having a partition valve. When the interior part is cooled in winter, a sluice valve is opened and a part of the high-temperature, high-pressure liquid refrigerant is transferred from the liquid refrigerant pipe connecting the outdoor unit heat exchanger and the indoor unit side to the exhaust heat circulation pipe. Extract and send to the heat exchanger of the exhaust heat absorption air conditioner. In this heat exchanger, the surrounding air and the high-temperature, high-pressure liquid refrigerant are heat-exchanged to generate hot air. Here, the blower of the exhaust heat absorbing air conditioner blows warm air from the floor surface of the perimeter unit to heat the perimeter unit. The liquid refrigerant that has exchanged heat with the surrounding air in the heat exchanger of the exhaust heat absorbing air conditioner is returned to the liquid refrigerant pipe through the exhaust heat circulation pipe.

In addition, when cooling the entire room in the summer, the sluice valve provided in the exhaust heat circulation pipe is closed and only the blower of the exhaust heat absorbing air conditioner is rotated. Thereby, a part of the cool air in the room is introduced into the underfloor space, and the cool air is blown from the floor surface of the perimeter portion toward the ceiling surface by the blower to form the air curtain on the outer wall side of the perimeter portion.

Therefore, in the apparatus of the present invention, the above-mentioned method of the present invention can be carried out accurately and these functions can be exhibited in the same cycle, so that the apparatus can be simplified and only two refrigerant pipes are required. Can be performed easily, and it is possible to save piping materials.

Further, in the apparatus of the present invention, the liquid refrigerant pipe connecting the outdoor unit heat exchanger and the indoor unit side is provided with a joint for connecting the exhaust heat circulation pipe in advance, so that the pipe at the place where the air conditioner is installed is installed. Installation work can be performed more easily.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, which is a system diagram of an air conditioner of the present invention incorporated into an underfloor system,
FIG. 2 is a schematic view of the underfloor type air conditioner.

The underfloor type air conditioner shown in FIG. 1 comprises an outdoor unit 19, an underfloor air conditioner 17 which is an indoor unit, and an exhaust heat absorbing air conditioner 18 installed in an underfloor space 26. Is configured.

The outdoor unit 19 includes a compressor 1, an accumulator 2, an outdoor unit heat exchanger 3, a four-way valve 4 and an outdoor unit blower 5.

The underfloor air conditioner 17 includes an indoor unit heat exchanger 6, an indoor unit blower 7, and an expansion valve 8.

The outdoor unit heat exchanger 3 of the outdoor unit 19 and the expansion valve 8 of the underfloor air conditioner 17 are connected to the liquid refrigerant pipe 1
Connected by 1. Further, the indoor unit heat exchanger 6 of the underfloor air conditioner 17 and the device of the outdoor unit 19 are
The gas refrigerant pipe 12 and the four-way valve 4 are connected to each other. A joint 1 for connecting the exhaust heat circulation pipe is provided in advance in the liquid refrigerant pipe 11 at a predetermined interval.
3a, 13b and a three-way flow dividing valve 20 are provided.

The exhaust heat absorbing air conditioner 18 comprises an exhaust heat exchanger heat exchanger 9 and an exhaust heat blower 10, and is formed thin.

The exhaust heat heat exchanger 9 of the exhaust heat absorbing air conditioner 18 is connected to the outdoor unit heat exchanger 3 and the underfloor air conditioner via the exhaust heat circulation pipes 14 and 15 connected to the joints 13a and 13b. It is connected to a liquid refrigerant pipe 11 which is connected to the expansion valve 8 of the machine 17. The exhaust heat circulation pipes 14 and 15
The solenoid valves 16a and 16b are provided as partition valves.

In the underfloor type air conditioner, as shown in FIG. 2, an underfloor space 26, a floor outlet 23 for blowing out conditioned air from the underfloor space 26 into the room, and a partition from the underfloor space 26. A rover outlet 24 that blows out conditioned air, a ceiling exhaust port 25, an exhaust duct 27 provided behind the ceiling, and a duct 29 that connects the exhaust duct 27 and the underfloor air conditioner 17 that is an indoor unit. Is equipped with.

The exhaust heat absorbing air conditioner 18 is shown in FIG.
As shown in FIG. 5, the air conditioner is installed in the underfloor space 26, and by rotating the exhaust heat blower 10, air is blown from the floor outlet 23 to the perimeter section in the air conditioning area.

The underfloor type air conditioner shown in FIGS. 1 and 2 operates and operates as follows.

By the way, when the interior section is cooled by the heat load from the OA equipment or the like in the winter, the perimeter section is affected by the outside air, and therefore needs to be heated.

Therefore, during the cooling of the interior portion in such a winter, in this embodiment, the three-way flow dividing valve 20 provided in the liquid refrigerant pipe 11 shown in FIG. 1 is opened to the exhaust heat circulation pipe side, and the exhaust heat circulation pipe 14, The solenoid valves 16a and 16b, which are sluice valves provided in 15, are opened. As a result, a part of the high-temperature and high-pressure liquid refrigerant is extracted from the liquid refrigerant pipe 11 connecting the discharge side of the outdoor unit heat exchanger 3 of the outdoor unit 19 and the expansion valve 8 of the underfloor air conditioner 17, and the liquid is extracted. Refrigerant solenoid valve 16a → exhaust heat circulation pipe 14 → exhaust heat absorption air conditioner 18 exhaust heat heat exchanger 9
The exhaust heat exchanger 9 exchanges heat between the surrounding air and the high-temperature, high-pressure liquid refrigerant to generate warm air in the underfloor space 26. Then, the exhaust heat blower 10 of the exhaust heat absorbing air conditioner 18 is rotated, and the hot air is blown out from the floor outlet 23 of the perimeter section to heat the perimeter section.

This makes it possible to utilize the exhaust heat generated when the interior part is cooled in winter and heat the perimeter part in the same cycle. Therefore, when the interior section is cooled and the perimeter section is heated in the winter, no separate heat source is required, so that it is possible to achieve significant energy saving.

The liquid refrigerant after heat exchange with the surrounding air in the exhaust heat heat exchanger 9 of the exhaust heat absorbing air conditioner 18 is the exhaust heat exchanger 9 → exhaust heat circulation pipe 15 → solenoid valve 16
It returns to the liquid refrigerant piping 11 via b.

When cooling the entire room in the summer,
When the air is cooled in one system, the perimeter portion is heated by the influence of the radiant heat of the sun and the like, so that uneven air conditioning occurs.

Therefore, in this embodiment, only the exhaust heat blower 10 of the exhaust heat absorption air conditioner 18 installed in the underfloor space 26 is rotated to introduce a part of the cool air of the interior portion into the underfloor space 26, The cold air is supplied to the floor outlet 23 of the perimeter unit.
Is blown from the ceiling to the ceiling exhaust port 25 to form an air curtain along the outer wall of the perimeter portion, thereby blocking the influence of outside air on the perimeter portion.

As a result, the influence of the outside air in the perimeter portion can be cut off in the same cycle, unevenness in air conditioning can be eliminated, and thermal efficiency can be improved.

In this embodiment, as can be seen from the above, the function of heating the perimeter portion during cooling of the interior portion in winter and the perimeter portion for shutting off the influence of outside air during cooling of the entire room in summer. Since it is possible to achieve the function of forming the air curtain in the same cycle, there is no need to individually provide a cooling / heating switching unit and an indoor unit as in the prior art, and therefore the device can be simplified and only two refrigerant pipes are required. Therefore, it is possible to reduce the cost of piping work and the cost of piping materials.

Moreover, in this embodiment, the outdoor unit heat exchanger 3 is used.
Since the joints 13a and 13b for connecting the exhaust heat circulation pipes are provided in advance in the liquid refrigerant pipe 11 that connects the discharge side of the air conditioner and the underfloor air conditioner 17 side that is an indoor unit, the liquid refrigerant pipe 11 and the exhaust heat absorption The installation work of the exhaust heat circulation pipes 14 and 15 connecting to the air conditioner 17 can be further simplified.

Regarding the structure of the joints 13a and 13b, any structure such as a structure in which flanges are connected to each other or a structure in which one connecting portion is inserted and the other connecting portion is clamped But good.

[0046]

According to the invention described in claim 1 of the present invention described above, when the interior part is cooled in winter, the exhaust heat of the high temperature and high pressure liquid refrigerant discharged from the outdoor unit heat exchanger is removed. We generate hot air in the underfloor space by using it and blow the hot air from the floor of the perimeter to heat the perimeter, using the exhaust heat from cooling the interior in winter. As a result of being able to heat the perimeter unit in the same cycle, there is no need for a separate heat source, and there is an effect that a large amount of energy can be saved.

According to the second aspect of the present invention, when cooling the entire room in summer, a part of the cool air in the room is introduced into the underfloor space, and the cool air is introduced into the floor surface of the perimeter section. The air curtain is blown toward the ceiling surface from the outside to form an air curtain on the outer wall side of the perimeter part. This air curtain can block the influence of the outside air, so it has the effect of eliminating uneven air conditioning due to the influence of the outside air. There is also an effect that the thermal efficiency can be increased.

According to the third aspect of the present invention, an exhaust heat absorbing air conditioner having a heat exchanger and a blower is installed in the underfloor space, and the exhaust heat absorbing air conditioner is installed outdoors. Since it is connected to the liquid refrigerant pipe connecting the machine heat exchanger and the indoor unit side via the exhaust heat circulation pipe having a sluice valve, there is an effect that the method of the present invention can be accurately carried out, and in winter The function of heating the perimeter when cooling the interior part and the function of forming an air curtain to block the influence of the outside air of the perimeter when cooling the entire room in the summer can be achieved in the same cycle, thus simplifying the device. There is an effect that can be achieved, and since only two refrigerant pipes are required, there is an effect that both piping construction cost and piping material cost can be saved.

Further, according to the invention of claim 4, the joint for connecting the exhaust heat circulation pipe is previously provided in the liquid refrigerant pipe connecting the outdoor unit heat exchanger and the indoor unit side. There is an effect that the installation work of the exhaust heat circulation pipe connecting the liquid refrigerant pipe and the exhaust heat absorbing air conditioner can be performed more easily.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

FIG. 2 is a schematic view in the same example.

FIG. 3 is a schematic diagram showing a conventional underfloor system.

FIG. 4 is a system diagram showing a conventional individual system for simultaneous operation of cooling and heating.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Accumulator, 3 ... Outdoor unit heat exchanger, 4 ... Four-way valve, 5 ... Outdoor unit blower, 6 ... Indoor unit heat exchanger, 7 ... Indoor unit blower, 8 ... Expansion valve, 9 ... Discharge Heater heat exchanger, 10 ... Exhaust heat blower, 11 ... Liquid refrigerant pipe, 12 ... Gas refrigerant pipe, 13a, 13b ... Joints for connecting exhaust heat circulation pipe, 14, 15 ... Exhaust heat circulation pipe, 16a, 16b
... Solenoid valve that is a sluice valve, 17 ... Underfloor air conditioner that is an indoor unit, 18 ... Exhaust heat absorption air conditioner, 19 ... Outdoor unit, 20 ... Three-way diverter valve, 23 ... Floor outlet, 24 ... Rover blowing Outlet, 25 ... Ceiling exhaust port, 26 ... Underfloor space, 27 ... Exhaust duct.

Claims (4)

[Claims] 1. An air-conditioning method for air-conditioning an air-conditioned area having an indoor unit and an outdoor unit and having an interior section and a perimeter section by an underfloor system, when the interior section is cooled in winter, the outdoor unit heat exchange is performed. The exhaust heat of the high-temperature, high-pressure liquid refrigerant discharged from the vessel is used to generate hot air in the underfloor space, and the hot air is blown from the floor surface of the perimeter section to heat the perimeter section. Air conditioning method. 2. An air-conditioning method for air-conditioning an air-conditioned area having an indoor unit and an outdoor unit and having an interior section and a perimeter section by an underfloor system, when the entire room is cooled in summer, An air conditioning method, characterized in that a part of the air is introduced into the underfloor space, and the cool air is blown from the floor surface of the perimeter portion toward the ceiling surface to form an air curtain on the outer wall side of the perimeter portion. 3. An air conditioner having an indoor unit and an outdoor unit and for air-conditioning an air-conditioned area having an interior section and a perimeter section by an underfloor system, wherein an exhaust system having a heat exchanger and a blower is provided in an underfloor space. A heat absorption air conditioner is installed, and this exhaust heat absorption air conditioner is connected to a liquid refrigerant pipe connecting the outdoor unit heat exchanger and the indoor unit side via an exhaust heat circulation pipe having a gate valve. Air conditioner to be. 4. The air conditioner according to claim 3, wherein a joint for connecting the exhaust heat circulation pipe is provided in advance in the liquid refrigerant pipe connecting the outdoor unit heat exchanger and the indoor unit side.