JP2008051468A - Radiant air conditioning unit - Google Patents

Abstract

Disclosed is a radiant cooling / heating device which can provide comfortable cooling / heating, is less likely to have scale and scale in pipes, has no oxidation of each member, and has good maintainability.
A heat exchange in which a primary-side circulation pipe 20 formed so that a heat exchange medium can be circulated, a heat source 18 provided in the middle of the primary-side circulation pipe 20, and the primary-side circulation pipe 20 are connected. A container 30 is provided. A secondary side circulation line 26 connected to the heat exchanger 30 and exchanging heat with the heat exchange medium of the primary side circulation line 20 to form a closed circuit, and provided in the middle of the secondary side circulation line 26 The expansion tank 62 and a secondary circulation pump 64 for circulating water are provided. A radiation panel 40 having a heat exchange pipe 41 is provided in the middle of the secondary-side circulation conduit 26, arranged facing the room. The water flowing through the secondary circulation line 26 has a temperature of 13 to 20 ° C., preferably 16 to 18 ° C. during cooling, and 30 to 40 ° C., preferably 32 to 34 ° C. during heating.
[Selection] Figure 1

Description

  The present invention relates to a radiant air conditioner that heats and cools a room with a radiant panel that circulates fluid and emits radiant heat.

  Conventionally, as an air conditioner that cools and heats a room, an air conditioner that uses an alternative chlorofluorocarbon gas as a refrigerant is generally used, and cool air or hot air is delivered indoors from an indoor unit outlet provided on a ceiling or a wall near the ceiling. There is known an apparatus for performing air conditioning by blowing out the air.

  Patent Document 1 discloses an apparatus in which water is used as a secondary refrigerant and cold / hot water is generated in a heat source unit. In this device, the high-temperature and high-pressure refrigerant gas discharged from the compressor is condensed and liquefied in the air-side heat exchanger, and the refrigerant liquid is decompressed by the expansion valve to become a liquid phase and a gas phase two-phase liquid, By absorbing heat from the water of the secondary refrigerant and evaporating it with the water-side heat exchanger, the water of the secondary refrigerant, which is the water to be cooled used for cooling, is cooled. This cold water circulates in the fan coil, cools the air in the vicinity of the fan coil, is blown into the room by the fan, and cools the room. In addition, the hot water used in the case of heating is such that the high-temperature and high-pressure refrigerant gas discharged from the compressor flows into the water-side heat exchanger, radiates the heat of condensation to the water that is the secondary refrigerant, and the water is heated. The refrigerant gas is condensed and liquefied. Then, as in the case of cooling, the heated hot water circulates through the fan coil, warms the air near the fan coil, and is blown by the fan to heat the room.

  In Patent Document 2, the primary fluid cooled or warmed by the heat source exchanges heat with the secondary fluid via the heat exchanger, and the secondary heat exchange fluid circulates through the radiation panel. An air conditioning apparatus for air conditioning is disclosed. The secondary side heat exchange fluid circulates through the radiating panel in which the heat exchange pipe is incorporated, in a circulation line constituting a closed circuit.

In addition, Patent Document 3 discloses a hot water heating apparatus in which warm water heated by heat exchange in a heat source section is sent to an indoor unit via a sealed circulation conduit, and is radiated from the indoor unit to the room for heating. Has been.
JP 11-344240 A JP 2000-240954 A JP 2004-286340 A

  In the conventional general technique described above, the refrigerant cooled or warmed by the heat source exchanges heat with the surrounding air using a heat exchanger, and the air that has been cooled or warmed is blown into the room to cool and heat the room. For this reason, noise generated by the flow of air blown out from the air outlet and the sound of the fans are harmful to the quietness of conference rooms and hospital rooms. In addition, cold air and hot air may feel uncomfortable due to hitting the body, particularly in the case of cooling, causing cooling disease.

  Moreover, in patent document 1, the danger by a refrigerant | coolant leaking indoors is reduced by using water with easy handling for a secondary refrigerant. However, since air that has been heat-exchanged with the refrigerant and cooled or warmed out into the room is blown out, problems such as unpleasantness such as noise at the air outlet and wind hitting the body remain, as in the conventional technology described above. It was.

  Moreover, in the air conditioning apparatus of patent document 2, by circulating hot water in the pipe line of the unit of the heat exchanger in which the closed circuit is formed, scales due to calcium ions in the water and scales due to microorganisms adhere to the pipe. There were problems such as clogging of heat exchange pipes with small diameters and reduction in thermal efficiency. In addition, condensation occurred on the radiant panel during cooling, and water droplets due to condensation fell on the ceiling or indoors, and germs were generated during condensation, causing mold.

  In addition, in the heating device of Patent Document 3, when water is circulated and used as a refrigerant, there is a problem that scales or scales due to ions or microorganisms in the water are generated and clogging of the pipeline occurs. Furthermore, Patent Document 3 relates to a heating device and does not consider dew condensation during cooling.

  The present invention has been made in view of the above-mentioned problems of the prior art, and can provide a comfortable cooling and heating system. It is difficult for scales and scales to adhere to the piping, and there is no corrosion of each member. The purpose is to provide.

  The present invention includes a primary side circulation line formed to circulate a heat exchange medium, a heat source provided in the middle of the primary side circulation line, and a heat exchanger to which the primary side circulation line is connected. A secondary side circulation line formed in a closed circuit by exchanging heat with the heat exchange medium of the primary side circulation line connected to the heat exchanger, and provided in the middle of the secondary side circulation line An expansion tank, a secondary circulation pump that circulates the water in the secondary circulation line, and a heat exchange pipe that is provided in the middle of the secondary circulation line and faces the room. It is a radiation type air conditioner provided with a radiation panel. The water flowing through the secondary circulation pipe is at a temperature of 13 to 20 ° C., preferably 16 to 18 ° C. during cooling, and at a temperature of 30 to 40 ° C., preferably 32 to 34 ° C. during heating.

  The heat exchange pipe of the radiant panel is composed of a plurality of thin resin pipes which are connected between a pair of main pipes connected to the secondary side circulation conduit and have flexibility.

  Furthermore, a dew condensation sensor for detecting dew condensation adhering to the surface of the radiation panel may be attached.

  According to the radiant cooling / heating device of the present invention, a cool feeling is obtained due to a large difference from the body temperature during cooling by the radiant panel, and there is no large difference from the body temperature during heating, and there is no hot flash on the face, etc. Obtainable. Furthermore, there is no dust soaring or discomfort caused by blowing air, and it is quiet because there is no noise such as blowing sound from the outlet. In addition, since the refrigerant pipe circulating through the radiation panel is formed in a closed circuit, no germs and microorganisms are mixed in, the refrigerant temperature is controlled to a relatively low temperature, and it is difficult for scale and scale to adhere to the pipe. Further, since the material of the pipeline is made of a material that is difficult to oxidize, the maintenance property is also good.

  Further, by providing a dew condensation sensor, it is possible to reliably prevent dew condensation on the radiant panel during cooling, and there is no generation of mold and bacteria due to dew condensation, and it can be used in a sanitary manner without dust adhesion.

  Hereinafter, one embodiment of a radiation type air conditioner according to the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the radiant cooling and heating apparatus 10 of this embodiment includes a ventilation device 12, a primary circuit 14 for cooling and heating, and a secondary circuit 16. First, the primary circuit 14 is provided with a heat source 18 that cools or warms water such as tap water that is a heat exchange medium to generate and circulate cold / hot water. The heat source 18 is an existing heat source for air conditioning or hot water supply in a building, for example. And the primary side circulation conduit 20 in which water was circulated to the heat source 18 was formed. The piping material forming the primary circulation pipe 20 is a highly durable metal pipe or the like, and the metal member such as a valve is also made of a non-corrosive material such as stainless steel, bronze, or brass. In addition, a pipe 21 is provided so as to be able to bypass the primary-side circulation pipe 20, and a three-way valve 22 is attached to the intersection of the primary-side circulation pipe 20 and the pipe 21. The three-way valve 22 is provided with a switching motor 23, and a temperature adjusting controller 24 is connected to the motor 23. A temperature detector 32, which will be described later, is attached to the adjuster 24 and is attached in the middle of the secondary-side circulation pipe 26 formed in the secondary circuit 16. The primary circulation circuit 20 is connected to a heat exchanger 30 provided in the device station 28 of the secondary circuit 16, and cold water or hot water is circulated between the heat source 18 and the heat exchanger 30. .

  The heat exchanger 30 is also connected to the secondary side circulation pipe 26, and water that is the secondary side heat exchange medium is circulated so that the hot and cold water circulating through the primary side circulation pipe 20 and the secondary side are circulated. The water circulating through the circulation pipe 26 is formed so as to be able to exchange heat. Note that tap water or the like is also used for water circulating through the secondary-side circulation pipe 26 as in the case of the primary circuit 14. The piping material of the secondary circulation pipe 26 is made of a resin that can be regenerated and does not corrode, and the metal member such as a valve is also made of a non-corrosive material such as stainless steel, bronze, or brass.

  A temperature detector 32 for detecting the water temperature is attached to the secondary circulation pipe 26 on the side where the circulating water flows out from the heat exchanger 30, and the output of the temperature detector 32 is connected to the regulator 24.

  On the downstream side of the temperature detector 32, the feed-side secondary circulation pipe 26 is branched into a plurality of branch pipes 26a, and a two-way valve 34 with an opening / closing mechanism is provided at each branch point. Each branch pipe 26 a is piped to the back of the ceiling of each room 46 of the building 36 and connected to a plurality of radiation panels 40 provided on the ceiling 38.

  The radiant panel 40 is provided with an outgoing piping port 40 a on the circulating water feed side, and the secondary side circulation pipes 26 are connected to each other via the manual two-way valve 42, and the water circulated through the radiant panel 40. Is provided with a return side return piping port 40b. A branch pipe 26a on the return side of the circulating water is connected to the return pipe port 40b via a manual two-way valve 42. The return side branch line 26a is connected to the other branch line 26a together with the other branch line 26a via a two-way valve 34 with an opening / closing mechanism, and connected to one return side secondary circulation line 26. Yes. The open / close mechanism-equipped two-way valves 34 of the return side branch pipeline 26a are connected to the control panel 58 via the switching motor 23, and the control panel 58 has a room temperature provided in each room 46. The output of the controller 60 is connected.

  The secondary circulation pipe 26 is formed as a closed circuit in which the pipe does not communicate with the atmosphere, and a hermetic expansion tank 62 is attached. Thereby, it is not necessary to replenish the tap water which causes the scale generated in the pipeline. Furthermore, since the water temperature of the secondary side circulation pipeline 26 is low, precipitation and sedimentation of scale can be suppressed. Further, a secondary circulation pump 64 is provided in the middle of the secondary circulation pipe 26 and is connected to the heat exchanger 30.

  The radiation panel 40 has an appropriate thickness, is formed in a rectangular panel shape made of metal and resin, and is suspended from a building structure material 36a on the back of the ceiling by a hanging tool 44 or the like. And the ceiling 38 is formed in combination with other ceiling members constituting the ceiling surface 38a. The ceiling 38 is provided with an exhaust port 48 and an air supply port 50 for ventilating the air in the room 46. A ventilation pipe 51 is connected to the exhaust port 48 and the air supply port 50 behind the ceiling, and a ventilation pipe 51 is connected to the outdoor air conditioner 52 of the ventilator 12.

  Further, inside the radiant panel 40, resin main pipes 43a and 43b are provided along one side edge, the forward pipe port 40a is provided in the main pipe 43a, and the return pipe port 40b is provided in the main pipe 43b. Is provided. A plurality of resin-made heat exchange pipes 41 having flexibility are connected between the main pipes 43a and 43b. The heat exchange pipe 41 is formed to have an inner diameter that is relatively narrower than the main pipes 43a and 43b, is arranged in a U shape along the inner surface of the radiation panel 40, and both ends thereof are connected to the main pipes 43a and 43b. . The upper surface on the back side of the ceiling of the heat exchange pipe 41 is thermally insulated by a heat insulating material 45. Further, a dew condensation sensor 54 is attached to an appropriate position on the ceiling surface 38a of the radiation panel 40. The dew condensation sensors 54 are connected to the control panel 58, respectively.

  Next, operation | movement of the radiation type air conditioner 10 of this embodiment is demonstrated. First, in the case of cooling, water, which is a heat exchange medium that circulates through the primary circulation pipe 20, is cooled by the heat source of the primary circuit 14. At this time, the temperature of the water circulating through the primary circulation pipe 20 is adjusted by the regulator 24. The regulator 24 detects the temperature of the fluid circulating through the secondary circulation circuit 26 by the temperature detector 32, and sets the temperature of the fluid circulating through the primary circulation circuit 20 to 5 to 10 ° C., preferably about The temperature is adjusted to an appropriate temperature of about 7 ° C. And if the water which circulates through the cooled primary side circulation line 20 distribute | circulates to the heat exchanger 30 provided in the secondary circuit 16, the water which circulates through the secondary side circulation line 26 will be heat-exchanged and cooled. . The water in the secondary circuit 16 cooled by the heat exchanger 30 is diverted to the branch pipes 26a of the secondary-side circulation pipe 26, and is supplied to the ceiling 38 of each room 46 where the branch pipes 26a are located. It circulates between the radiant panel 40 provided. At this time, the temperature of the cold water circulating through the radiation panel 40 is adjusted by the adjuster 24 so as to be about 13 to 20 ° C., for example, about 16 ° C. on the feed side and about 18 ° C. on the return side. Due to this temperature, condensation is unlikely to occur on the radiation panel 40. When the fluid circulates through the radiant panel 40, heat is exchanged with the panel surface by the heat exchange pipe 41, heat is absorbed on the panel surface of the radiant panel 40, air in the vicinity of the radiant panel 40 is cooled, and radiant heat from the human body is absorbed. It absorbs heat. Then, since the air in the room 46 is cooled and the temperature difference between the human body and the radiation panel 40 is large, the amount of heat released from humans increases, and it feels cool.

  In the case of heating, the water circulating through the primary circulation pipe 20 is warmed to about 50 ° C. by the heat source of the primary circuit 14. Then, the heated water circulates through the heat exchanger 30 provided in the secondary circuit 16, and is heat-exchanged with the water circulating in the secondary-side circulation pipeline 26, and circulates in the secondary-side circulation pipeline 26. The water is warmed. The water heated by the heat exchanger 30 is diverted to each branch pipe 26a, and circulates between the radiation panels 40 provided on the ceiling of each room 46 where each branch pipe 26a is located. At this time, the temperature of the hot water circulating through the radiation panel 40 is adjusted by the adjuster 24 so as to be about 30 to 40 ° C., for example, about 34 ° C. on the feed side and about 30 ° C. on the return side. When the fluid circulates through the radiant panel 40, radiant heat is released and the air near the radiant heat panel 40 is warmed. Then, the difference in the ambient temperature between the ceiling surface 38a and the human body in the room 46 is reduced, and the heat radiated from the radiant panel 40 reduces the amount of heat radiated from humans and feels warm.

  In addition, the air in the room 46 is ventilated by the ventilator 12. The outdoor air conditioner 52 of the ventilator 12 sucks air from the room 46 through an exhaust port 48 provided in the ceiling 38 and exhausts it to the outside, and at the same time sucks fresh air from the outside and provides it on the ceiling 38 of the room 46. Air is supplied from the supplied air supply port 50. In addition, if the outdoor air conditioner 52 also exchanges heat between exhaust and intake, the thermal efficiency is further improved.

  Further, as shown in FIG. 2, when condensation on the surface of the radiation panel 40 is detected by the condensation sensor 54 provided on the radiation panel 40, the mechanism unit connected to the control panel 58 causes the two-way valve 34 with an opening / closing mechanism. Close to stop cooling and evaporate condensation. Further, the temperature of the room 46 is adjusted according to the set temperature of the room temperature controller 60 by adjusting the opening of the two-way valve 34 with an opening / closing mechanism by a mechanism connected to the control panel 58, and the flow rate of the fluid is adjusted. Adjusted.

  According to the radiant cooling and heating apparatus 10 of this embodiment, the cooling and heating are performed by the radiant heat generated by the radiant panel 40 provided on the ceiling 38 of the room 46. For this reason, the rising of dust due to blowing is prevented, and the person in the room 46 is not exposed to the air, so there is no discomfort. In addition, since there is no need for a cooling / heating outlet, there is no noise caused by blowing air and the like, and it is quiet. Furthermore, in the secondary side circulation pipe 26 of the secondary circuit 16, which is a closed circuit, water at around 16 ° C and water in the range of around 34 ° C circulate, and at the time of cooling, the water temperature is above the dew point. Since cooling is performed, condensation is unlikely to occur on the radiation panel 40. Further, the temperature state is such that scales and scales due to germs and the like are not easily attached in the pipe.

  Further, by using piping members that do not rust at various places, clogging due to rust or the like does not occur, and maintainability is improved. In FIG. 2, manual two-way valves for the forward piping port 40a and the return piping port 40b are omitted. This manual two-way valve is used when replacing the radiation panel or performing maintenance.

  Furthermore, since the dew condensation sensor 54 is provided to prevent dew condensation, dew condensation is reliably prevented. Further, during heating, the difference between the temperature of the radiant panel 40 and the body temperature is small, the face is not heated, and a gentle heating effect can be obtained. The heat source 18 can perform radiant heating using a general-purpose office air conditioner or a heat source for hot water supply and hot water, and does not require a special device.

  Note that the radiant cooling / heating device of the present invention is not limited to the above-described embodiment, and it is sufficient that the surface of the radiant panel can be configured to be exposed indoors, so the mounting position, shape, and size can be set as appropriate. It is a thing. Furthermore, the shape and material of each member can be appropriately changed.

It is a piping system diagram showing a radiation type air conditioning system of one embodiment of this invention. It is a control system figure which shows the structure of the dew condensation prevention control of the radiation type air conditioning apparatus of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Radiation type air conditioner 12 Ventilator 14 Primary circuit 16 Secondary circuit 18 Heat source 20 Primary side circulation line 26 Secondary side circulation line 30 Heat exchanger 36 Building 40 Radiation panel 41 Heat exchange pipes 43a and 43b Main pipe 46 Indoor 54 Condensation sensor 62 Expansion tank 64 Secondary side circulation pump

Claims (3)

  A primary side circulation line formed to be able to circulate the heat exchange medium, a heat source provided in the middle of the primary side circulation line, a heat exchanger to which the primary side circulation line is connected, and this heat exchange A secondary side circulation line formed in a closed circuit by exchanging heat with a heat exchange medium of the primary side circulation line connected to a container, and an expansion tank provided in the middle of the secondary side circulation line A secondary circulation pump for circulating water in the secondary circulation line, and a radiation panel provided in the middle of the secondary circulation line and facing the room and having a heat exchange pipe The water which flows through the secondary side circulation pipe has a temperature of 13 to 20 ° C. during cooling and 30 to 40 ° C. during heating.   The heat exchange pipe of the radiant panel is composed of a plurality of thin resin pipes which are connected between a pair of main pipes connected to the secondary side circulation pipe and have flexibility. Radiant air conditioning unit. The radiation type air conditioner according to claim 1 or 2, wherein a condensation sensor for detecting condensation on the surface of the radiation panel is attached to the radiation panel.

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