JP6057789B2 - Air conditioning system and air conditioner - Google Patents

Description

  The present invention relates to an air conditioning system and an air conditioner, and more particularly to an air conditioning system and an air conditioner suitable for personal air conditioning.

  Conventionally, as a personal air conditioning system, for example, a technique described in Patent Document 1 is known. The air conditioning system described in Patent Document 1 houses a refrigeration circuit in a box and incorporates it into furniture such as a low partition and a desk to finely adjust local air conditioning.

  The air conditioning system described in Patent Document 1 includes a cooling plate that is cooled by cold air sent from a cold air blowing device and emits cold radiation, and a cold air outlet that blows out the cold air. Thereby, this air-conditioning system has a cooling effect according to the user's experience.

JP-A-5-66051

  The air conditioning system in which the refrigerant circuit described in the cited document 1 is incorporated as a unit in the housing discharges the exhaust heat of the compressor into the room during cooling. Therefore, such an air conditioning system must consider waste heat treatment from the viewpoint of user comfort. However, the air conditioning system of the cited document 1 does not consider exhaust heat at all, and the hot air of exhaust heat may cause a user to feel uncomfortable.

  In addition, an air conditioning system using a radiant air conditioning system can only process sensible heat and cannot process latent heat. For this reason, there has been a problem that a dehumidifier has to be installed separately when performing the latent heat treatment. Further, when the dehumidifier cannot be installed in the vicinity of an individual, the air environment around the individual may be uncomfortable.

  The present invention has been made in consideration of such circumstances, and performs sensible heat treatment by a radiation air-conditioning method and latent heat treatment by a convection air-conditioning method at the same time, improving the efficiency, comfort and energy saving of the refrigerant circuit, An object of the present invention is to provide an air conditioning system and an air conditioner that can be downsized.

  In order to solve the above-described problem, an air conditioning system according to the present invention includes a compressor, a condenser, an expansion valve, a radiant air conditioning evaporator, and a dehumidifying cooling evaporator, and a refrigerant circuit that circulates the refrigerant, A housing containing a refrigerant circuit, a radiant panel connected to the housing and radiantly air-conditioned by a heat medium heat-exchanged in the radiant air-conditioning evaporator, taking air from outside the housing, and taking part of the air A blower that leads to a dehumidifying and cooling evaporator and dehumidifies and cools, and a part of the dehumidified and cooled air and the other air are both guided to the condenser and heated to be discharged out of the housing. Features.

  Further, an air conditioner according to the present invention includes a compressor circuit, a condenser, an expansion valve, a radiant air conditioning evaporator, and a dehumidifying cooling evaporator, and a refrigerant circuit for circulating the refrigerant, in order to solve the above-described problems. A housing containing the refrigerant circuit, and taking in air from outside the housing, leading a part of the air to the dehumidifying and cooling evaporator to dehumidify and cooling, the dehumidified and cooled part of the air and the other A blower that guides and heats the air to the condenser and discharges the air out of the housing.

  In the air conditioning system and the air conditioner according to the present invention, the sensible heat treatment by the radiation air conditioning method and the latent heat treatment by the convection air conditioning method are simultaneously performed to improve the efficiency, comfort and energy saving of the refrigerant circuit, and to reduce the size. Can be realized.

The block diagram which shows 1st Embodiment of the air conditioning system and air conditioner which concern on this invention. BRIEF DESCRIPTION OF THE DRAWINGS The external appearance block diagram which shows 1st Embodiment of the air conditioning system and air conditioner which concern on this invention. Explanatory drawing when the air conditioning system as a comparative example operate | moves on predetermined conditions. Explanatory drawing when the air conditioning system in 1st Embodiment operate | moved on predetermined conditions. The external appearance block diagram at the time of connecting the radiation panel as a partition to a portable air conditioner. The block diagram which shows the air conditioning system and air conditioner as a modification of 1st Embodiment provided with the pneumatic radiation panel. It is an external appearance block diagram which shows the air conditioning system and air conditioner as a modification of 1st Embodiment provided with the pneumatic type radiation panel, (A) shows an air conditioner and a radiation panel, (B) is the side surface of a radiation panel. Indicates. The block diagram which shows 2nd Embodiment of the air conditioning system and air conditioner which concern on this invention. The block diagram which shows the air conditioning system and air conditioner as a modification of 2nd Embodiment provided with the pneumatic radiation panel.

  Embodiments of an air conditioning system and an air conditioner according to the present invention will be described with reference to the accompanying drawings.

  In the following embodiments, an air conditioning system and an air conditioner according to the present invention will be described by applying them to a personal air conditioning system and an air conditioner. “Personal air conditioning” is air conditioning that can be controlled in a specific space or by an individual. The air conditioning system and the air conditioner are installed in an air-conditioned space such as a living room. Therefore, the heat exchanger used in the present invention is not connected to a centrally managed device such as a cooling tower or a boiler.

[First Embodiment]
FIG. 1 is a configuration diagram showing a first embodiment of an air conditioning system and an air conditioner according to the present invention.

  FIG. 2 is an external configuration diagram showing the first embodiment of the air conditioning system and the air conditioner according to the present invention.

  The air conditioning system 1 includes an air conditioner 10 and a water-type radiation panel 30.

  The air conditioner 10 includes a refrigerant circuit 11 and a housing 12 that houses the refrigerant circuit 11.

The refrigerant circuit 11 includes a compressor 13, a four-way valve 14, a condenser 15, an expansion valve 16, a radiant air conditioning evaporator 17, and a dehumidifying and cooling evaporator 18.
Further, the air conditioner 10 guides the air taken in from the housing 12 and heat-exchanged in the dehumidifying and cooling evaporator 18 and the air taken in from outside the housing 12 to the condenser 15 and then discharged out of the housing 12. The fan 22, the reheat air passage 20, and the bypass air passage 21 are further provided.

  The blower 22 is disposed downstream of the condenser 15 in the mixed air flow. The blower 22 takes in air from the outside of the housing 12 and guides the air to the dehumidifying and cooling evaporator 18 and the condenser 15. The blower 22 introduces a part of the air to the dehumidifying and cooling evaporator 18 and dehumidifies and cools it. Also, the blower 22 guides and heats part of the air that has been dehumidified and cooled and the other air to the condenser 15, and discharges them outside the housing 12. The reheat air passage 20 guides the air taken from outside the housing 12 and heat-exchanged in the dehumidifying and cooling evaporator 18 to the condenser 15. The bypass air passage 21 guides air taken from outside the casing 12 (air-conditioned space or near the air-conditioned space) to the reheat air passage 20. That is, the air passing through the reheat air passage 20 and the air passing through the bypass air passage 21 become mixed air before the condenser 15 and are led to the condenser 15. In order to take in and out air between the inside of the housing 12 and the outside of the housing 12, the housing 12 includes an intake port for taking in air from the outside of the housing 12 and an exhaust port for discharging air out of the housing 12. .

  The water-type radiant panel 30 (radiant panel 30) is a radiant panel that uses water as a heat medium and performs air conditioning by a radiant air-conditioning method.

  The heat medium circulation circuit 25 (circulation circuit 25) is provided for water exchange in the radiation panel 30 to exchange heat in the radiation air conditioning evaporator 17. The circulation circuit 25 includes a pump 26 for circulating water. As shown in FIG. 2, the radiant panel 30 includes an inlet pipe 31 and an outlet pipe 32 that serve as an inlet and an outlet of water. A part of the circulation circuit 25 including the pump 26 is accommodated in the housing 12 and connected to the inlet pipe 31 and the outlet pipe 32 on the radiation panel 30 side, thereby forming the circulation circuit 25. Since the air conditioner 10 and the radiation panel 30 are attached and detached via the inlet pipe 31 and the outlet pipe 32, the air conditioner 10 and the radiation panel 30 can be easily connected. The inlet pipe 31 and the outlet pipe 32 may be provided on the air conditioner 10 side.

  As shown in FIG. 2, the housing | casing 12 and the radiation panel 30 are provided with the caster 35 as a leg part. Thereby, the housing | casing 12 and the radiation panel 30 can be moved freely.

  Next, the operation of the air conditioning system 1 and the air conditioner 10 in the first embodiment will be described. In FIG. 1, the refrigerant flow during the cooling operation is indicated by a solid line arrow, and the refrigerant flow during the heating operation is indicated by a dotted line arrow.

  During the cooling operation, the refrigerant compressed by the compressor 13 is guided to the condenser 15 through the four-way valve 14. The refrigerant exchanges heat in the condenser 15 with the mixed air guided through the reheat air passage 20 and the bypass air passage 21. That is, the air including the air cooled by the dehumidifying and cooling evaporator 18 is heated (reheated), and the refrigerant is condensed.

  Thereafter, the refrigerant is decompressed by the expansion valve 16. The decompressed refrigerant exchanges heat with water in the circulation circuit 25 connected to the radiation panel 30 in the radiation air conditioning evaporator 17. That is, the heat medium in the circulation circuit 25 is cooled and the refrigerant evaporates. Thereby, the water in the circulation circuit 25 is cooled and supplied to the radiating panel 30, whereby the radiating panel 30 is radiated and air-conditioned.

  Further, the refrigerant exchanges heat with air taken from outside the housing 12 in the dehumidifying and cooling evaporator 18. That is, the air is cooled and the refrigerant evaporates. Thereby, the surrounding environment of the air conditioner 10 is dehumidified and cooled. Further, as described above, the dehumidified and cooled air becomes mixed air, is led to the condenser 15, is reheated, and is then discharged out of the housing 12.

  In the heating operation, the four-way valve 14 is switched with respect to the cooling operation, and the refrigerant flow is switched. The radiant air-conditioning evaporator 17 and the dehumidifying and cooling evaporator 18 each function as a condenser, and the condenser 15 functions as an evaporator.

  The refrigerant compressed by the compressor 13 is guided to the dehumidifying and cooling evaporator 18 through the four-way valve 14. The refrigerant exchanges heat with air taken from outside the housing 12 in the dehumidifying and cooling evaporator 18. That is, the air is heated and the refrigerant is condensed. Further, in the radiant air-conditioning evaporator 17, heat is exchanged with water in the circulation circuit 25. That is, the water in the circulation circuit 25 is heated and the refrigerant is condensed. Thereby, the water in the circulation circuit 25 is heated and supplied to the radiating panel 30, whereby the radiating panel 30 is radiated and air-conditioned.

  Thereafter, the refrigerant is decompressed by the expansion valve 16. The decompressed refrigerant exchanges heat with the mixed air guided through the reheat air passage 20 and the bypass air passage 21 in the condenser 15. That is, the air including the air heated by the dehumidifying and cooling evaporator 18 is cooled, and the refrigerant evaporates. The cooled air is discharged out of the housing 12.

  In the air conditioning system 1 and the air conditioner 10 according to the first embodiment as described above, the dehumidifying and cooling evaporator 18 is provided in the refrigerant circuit 11. In the air conditioning system 1 and the air conditioner 10, the air dehumidified and cooled by the dehumidifying and cooling evaporator 18 is reheated by the condenser 15 during the cooling operation. Thereby, the air conditioning system 1 and the air conditioner 10 can reheat the air dehumidified and cooled in the condenser 15 while performing the sensible heat treatment by the radiant air conditioning method and the latent heat treatment by the convection air conditioning method. As a result, even if it is a radiation air-conditioning type air conditioner, it is not necessary to install a separate dehumidifier.

  In addition, the air conditioning system 1 and the air conditioner 10 flow the air, which is a mixture of the air cooled by the dehumidifying and cooling evaporator 18 and the bypassed indoor air, to the condenser 15. For this reason, the exhaust heat temperature of the condenser 15 falls compared with a general method (refer to the following comparative example), and it is possible to reduce discomfort to the user due to exhaust heat.

  Furthermore, the air conditioning system 1 has an effect of improving COP (Coefficient Of Performance) and reducing the power consumption of the compressor 13. Hereinafter, the improvement in COP and the reduction in power consumption of the compressor 13 will be specifically described.

  FIG. 3 is an explanatory diagram when the air conditioning system 40 as a comparative example operates under a predetermined condition.

  FIG. 4 is an explanatory diagram when the air conditioning system 1 according to the first embodiment is operated under a predetermined condition.

  The air conditioning system 40 and the air conditioner 41 as the comparative example shown in FIG. 3 are different from the air conditioning system 1 air conditioner 10 in the first embodiment in that the dehumidifying blower 43 and the exhaust heat blower 44 are individually provided in the air conditioner 41. The air that is provided and dehumidified and cooled by the dehumidifying and cooling evaporator 18 is not guided to the condenser 15. In addition, in the air conditioning system 40 as a comparative example, the same code | symbol is attached | subjected about the structure and part corresponding to the air conditioning system 1 in 1st Embodiment.

  In order to compare the effects of the air conditioning system 1 in the first embodiment and the air conditioning system 40 as a comparative example, the exhaust heat temperature (the temperature of the blown air) in the condenser 15, the power consumption of the compressor 13, and the COP are respectively calculated. did. The calculation was performed as follows.

  The heat load is set to 53W / person of latent heat, 69W / person of sensible heat, and 122W / person of total heat (assuming an office where office work is performed in summer). Further, it is assumed that the radiant air conditioning in the radiant air conditioning evaporator 17 (radiant panel 30) is sensible heat treatment, and sensible heat 69W per person is treated.

  The dehumidifying cooling in the dehumidifying cooling evaporator 18 is performed by a latent heat treatment and a sensible heat treatment, and the latent heat 53W per person is processed. Further, assuming that the sensible heat ratio is 0.75 and calculating the total heat and sensible heat based on the sensible heat ratio and the latent heat 53W, the total heat is 212W and the sensible heat is 159W. Here, the sensible heat 159W processed by the dehumidifying and cooling evaporator 18 is a sensible heat load other than a person.

The room temperature is 27 ° C. DB / 19 ° C. WB, and the relative humidity of the blown air blown out from the dehumidifying and cooling evaporator 18 is 90%. The air flow rate of the dehumidifying blower 43 is 0.525 m ³ / min, and the air flow rates of the exhaust heat blower 44 and the blower 22 are 1.24 m ³ / min. The refrigerant of the refrigerant circuits 10 and 42 is R134a.

  The blown air temperature of the condenser 15 of the air conditioning system 40 as a comparative example, the COP, and the power consumption of the compressor 13 are obtained. For the air conditioning system 40, when various values are applied to the thermal load equation (thermal load = air density × air flow rate × specific enthalpy difference), the specific enthalpy difference before and after cooling in the dehumidifying and cooling evaporator 18 is as follows.

0.212 KW = Δi × 1.2 Kg / m ³ × 0.525 × 60 m ³ / h ÷ 860 Cal / Wh

  Thereby, Δi = 4.82 Kcal / Kg (DA) is calculated.

  From the air diagram, the air blown from the dehumidifying and cooling evaporator 18 becomes 12.74 ° C. DB / 11.82 ° C. WB.

  Assuming that the evaporation temperature of the evaporators 17 and 18 is 5 ° C. (12.74 ° C.-7.74 ° C.), the evaporation pressure is 0.35 Mpa (abs) from the Ph diagram of R134a. When the condensation temperature of the condenser 15 is 47 ° C. (42 ° C. + 5 ° C.), the condensation pressure is 1.22 Mpa (abs). Similarly, from the Ph diagram, the freezing effect is 137.07 KJ / Kg and the compression work is 26.73 KJ / Kg. When the efficiency of the evaporators 17 and 18 is 0.82 and the efficiency of the compressor 13 is 0.7, COP = (refrigeration effect 139.07 KJ / Kg × 0.82) ÷ (compression work 26.73 KJ / Kg / 0 .7) = 2.99≈3. Further, if the power consumption of the compressor 13 is calculated based on COP = 3 and the cooling capacity 281 W ((heat load 69 W of the evaporator 17 for radiation air conditioning) + (heat load 212 W of the evaporator 18 for dehumidification cooling)), ( (Power consumption of the compressor 13) = cooling capacity 281W / COP3≈94W.

  On the other hand, the amount of heat processed by the condenser 15 is (heat load 212 W of the dehumidifying and cooling evaporator 18) + (heat load 69 W of the radiant air-conditioning evaporator 17) + (power consumption 94 W of the compressor 13) = 375 W. When applied to the above thermal load equation, the temperature difference of the blown air before and after heating in the condenser 15 is as follows.

0.375 KW = Δt × 1.2 Kg / m ³ × 0.24 Kcal / Kg · ° C. × 1.24 × 60 m ³ / h ÷ 860 Cal / Wh

  Thereby, Δt = 15.05 ° C. is calculated. Therefore, in the condenser 15, air of room temperature 27 ° C. DB + temperature difference 15.05 ° C. = 42.05 ° C. DB (dry bulb temperature) is blown out. Further, from the air diagram, the wet bulb temperature is 23.44 ° C. WB.

  Similarly, the blown air temperature, COP, and power consumption of the compressor 13 of the condenser 15 of the air conditioning system 1 in the first embodiment are obtained. Similar to the dehumidifying and cooling evaporator 18 as the comparative example, the temperature of the air discharged from the dehumidifying and cooling evaporator 18 flowing through the reheat air passage 20 in the air conditioning system 1 is 12.74 ° C. DB / 11.82 ° C. WB. .

On the other hand, the air volume of the air flowing through the bypass air passage 21 is 0.715 m ³ / min. When this bypassed room air and air after dehumidification cooling are mixed, the mixed air flow rate is 1.24 m ³ / min, and the mixed air temperature is 20.97 ° C. DB / 166.2 ° C. WB.

  This mixed air is guided to the condenser 15 and reheated. Here, in the air conditioning system 40 as a comparative example, the mixed air temperature is 27 ° C.-20.97 ° C.≈6 compared with the temperature 27 ° C. DB / 19 ° C. WB of the air (room air) guided to the condenser 15. The temperature DB is also low. Assuming that the condensation temperature of R134a is 41 ° C with respect to 47 ° C of the air conditioning system 40 as a comparative example, the condensation pressure is 1.05 Mpa (abs) from the Ph diagram of R134a. Assuming that the evaporation temperature of the evaporators 17 and 18 is 5 ° C. as in the air conditioning system 40 as a comparative example, the evaporation pressure is 0.35 Mpa (abs). Similarly, from the Ph diagram, the freezing effect is 148.17 KJ / Kg and the compression work is 23.36 KJ / Kg.

  When the efficiency of the evaporators 17 and 18 is 0.82 and the efficiency of the compressor 13 is 0.7, COP = (refrigeration effect 148.17 KJ / Kg × 0.82) ÷ (compression work 23.36 KJ / Kg / 0 .7) = 3.64. Further, when the power consumption of the compressor 13 is calculated based on the COP and the cooling capacity 281W, (power consumption of the compressor 13) = cooling capacity 281W ÷ COP3.64 = 77.2W.

  On the other hand, the processing heat amount of the condenser 15 is (212 W of the dehumidifying cooling evaporator 18) + (heat load 69 W of the radiant air conditioning evaporator 17) + (power consumption of the compressor 13 77.2 W) = 358.2 W. Become. When applied to the above thermal load equation, the temperature difference of the blown air before and after heating in the condenser 15 is as follows.

0.3582 KW = Δt × 1.2 Kg / m ³ × 0.24 Kcal / Kg · ° C. × 1.24 × 60 m ³ / h ÷ 860 Cal / Wh

  Thereby, Δt = 14.38 ° C. is calculated. Therefore, in the condenser 15, air having a mixed air temperature of 20.97 ° C. DB + temperature difference of 14.38 ° C. = 35.35 ° C. DB (dry bulb temperature) is blown out. Further, from the air diagram, the wet bulb temperature is 21.57 ° C. WB.

  In the air conditioning system 1 according to the first embodiment, cold air (air) dehumidified and cooled by the dehumidifying and cooling evaporator 18 exchanges heat with the refrigerant in the condenser 15 and is reheated by the condenser 15. The exhaust heat temperature becomes lower than the normal exhaust heat temperature by dehumidification and reheating. For this reason, it can blow out in a residence area and can reduce the discomfort by exhaust heat. Moreover, the refrigerant | coolant temperature of the condenser 15 falls compared with the air conditioning system 40 as a comparative example. Thereby, since efficiency improves, the condenser 15, and by extension, the air conditioner 10 whole can be reduced in size.

  Moreover, the blowing air temperature (exhaust heat temperature) of the condenser 15 is 35.35 ° C. DB, which is lower than the blowing air temperature 42.05 ° C. DB of the air conditioning system 40 of the comparative example. For this reason, the size of the air conditioner 10 itself can be reduced because the size and number of other auxiliary machines (such as a blower) can be reduced while the condenser 15 can be reduced in size. Moreover, the air conditioner 10 can be made portable as the size is reduced. For example, FIG. 5 is an external configuration diagram when the radiation panel 30 as a partition is connected to the portable air conditioner 10. In this way, by attaching a portable means such as a caster to the air conditioner 10, for example, even if a desk or the like in the office moves, the air conditioner 10 can be easily moved and can be rearranged appropriately. Further, by applying the fact that it can be moved, the radiating panel 30 may be a partition as shown in the figure. Thereby, the air conditioning system 1 can air-condition the space divided by the small sections efficiently. Further, when a temperature sensor is provided in the air conditioning system 1, it is possible to provide air conditioning that suits individual preference by automatically switching between cooling and heating depending on the difference between the temperature sensor and room temperature.

The various conditions described with reference to FIGS. 3 and 4 are examples. For example, if the air volume of the condenser 15 is 1.24 m ³ / min or more, the blown air temperature can be lowered from 35.35 ° C. DB, and the condensation temperature is lowered. Thereby, COP further improves and the power consumption of the compressor 13 can be further reduced.

  In addition, as described with reference to FIGS. 3 and 4, the air conditioning system 1 and the air conditioner 10 in the first embodiment can be air-conditioned with a small capacity (about 100 W output) compressor, so the exhaust heat is about 100 W, The cooling load can be reduced.

  During the heating operation, the dehumidifying and cooling evaporator 18 does not function as dehumidifying cooling. However, the heat-exchanged air is mixed with the air guided from the bypass air passage 21 and supplied to the condenser 15, so that the efficiency of the condenser 15 can be improved as in the cooling operation.

  In 1st Embodiment, although the air-conditioning system 1 provided with the water type radiation panel 30 was demonstrated to the example, a pneumatic type radiation panel may be sufficient.

  FIG. 6 is a configuration diagram showing an air conditioning system and an air conditioner as a modified example of the first embodiment provided with a pneumatic radiating panel 60.

  FIG. 7: is an external appearance block diagram which shows the air conditioning system and air conditioner as a modification of 1st Embodiment provided with the pneumatic radiation panel 60, (A) shows the air conditioner 51 and the radiation panel 60, B) shows the side of the radiating panel 60.

  The air conditioning system 50 and the air conditioner 51 shown in FIGS. 6 and 7 are different from the air conditioning system 1 and the air conditioner 10 shown in FIGS. 1 and 2 in that the radiating panel is a pneumatic radiating panel 60. Configurations and portions corresponding to those of the air conditioning system 1 and the air conditioner 10 of the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The pneumatic radiant panel 60 (radiant panel 60) is a radiant panel that uses air as a heat medium and performs air conditioning by a radiant air conditioning system. The radiant panel 60 is provided with a predetermined air outlet, and the air guided into the radiant panel 60 is blown out.

  The air conditioner 51 includes a radiant air conditioning air passage 53 and a blower 54. The radiant air-conditioning air passage 53 is provided in order to exchange the heat of the air guided from the room (outside the casing 12) with the radiant air-conditioning evaporator 17 and guide the air into the radiant panel 60. The blower 54 blows the heat-exchanged air to the radiation panel 60.

  As shown in FIG. 7, the radiating panel 60 includes a duct 62 serving as an air inlet. The radiant air conditioning air passage 53 including the blower 54 is accommodated in the housing 12 and connected to the duct 62. Since the air conditioner 51 and the radiation panel 60 are attached and detached via the duct 62, the air conditioner 51 and the radiation panel 60 can be easily connected.

  The air conditioning system 50 and the air conditioner 51 provided with such a pneumatic radiating panel 60 can exhibit the same operations and effects as the air conditioning system 1 and the air conditioner 10 in the first embodiment.

[Second Embodiment]
FIG. 8 is a configuration diagram showing a second embodiment of the air conditioning system and the air conditioner according to the present invention.

  The air conditioning system 70 and the air conditioner 80 in the second embodiment are different from the air conditioning system 1 and the air conditioner 10 in the first embodiment in that the four-way valve is not provided, and the cooling expansion valve 85 and the expansion valve 86 are provided. It is a point. Since the other configuration is the same as that of the air conditioning system 1 and the air conditioner 10 in the first embodiment, the same reference numerals are given to the configurations and parts corresponding to those in the first embodiment, and duplicate descriptions are omitted.

  The air conditioning system 70 includes an air conditioner 80 and a water-type radiation panel 30.

  The air conditioner 80 includes a refrigerant circuit 81 and a housing 12 that houses the refrigerant circuit 81.

  The refrigerant circuit 81 includes a compressor 13, a condenser 15, a cooling expansion valve 85, a radiant air conditioning evaporator 17, a heating expansion valve 86, and a dehumidifying cooling evaporator 18.

  Next, the operation of the air conditioning system 70 in the second embodiment will be described. In FIG. 8, the flow of the refrigerant is indicated by solid arrows during the cooling operation and the heating operation.

  During the cooling operation, the refrigerant compressed by the compressor 13 is guided to the condenser 15. The refrigerant exchanges heat with the air guided through the reheat air passage 20 and the bypass air passage 21 in the condenser 15. That is, the air including the air cooled by the dehumidifying and cooling evaporator 18 is heated (reheated), and the refrigerant is condensed.

  Thereafter, the refrigerant is decompressed by the cooling expansion valve 85. The decompressed refrigerant exchanges heat with water in the circulation circuit 25 connected to the radiation panel 30 in the radiation air conditioning evaporator 17. That is, the heat medium in the circulation circuit 25 is cooled and the refrigerant evaporates. As a result, the water in the circulation circuit 25 is cooled and supplied to the radiating panel 30 to radiate air conditioning.

  Thereafter, the refrigerant passes through the fully open heating expansion valve 86 and exchanges heat with the air taken in from the outside of the housing 12 in the dehumidifying and cooling evaporator 18. That is, the air is cooled and the refrigerant evaporates. Thereby, the surrounding environment of the air conditioner 10 is dehumidified and cooled. Further, as described above, the air taken in from the outside of the housing 12 and dehumidified and cooled is guided to the condenser 15 and reheated, and then discharged to the outside of the housing 12.

  During the heating operation, the radiant air-conditioning evaporator 17 and the condenser 15 each function as a condenser, and the dehumidifying and cooling evaporator 18 functions as an evaporator.

  The refrigerant compressed by the compressor 13 is guided to the condenser 15. The refrigerant exchanges heat with the air guided through the reheat air passage 20 and the bypass air passage 21 in the condenser 15. That is, the air including the air cooled by the dehumidifying and cooling evaporator 18 is heated (reheated), and the refrigerant is condensed.

  The refrigerant passes through the fully opened cooling expansion valve 85 and exchanges heat with water in the circulation circuit 25 in the radiant air conditioning evaporator 17. That is, the water in the circulation circuit 25 is heated and the refrigerant is condensed. Thereby, the water in the circulation circuit 25 is heated and supplied to the radiating panel 30 to radiate air-conditioning.

  The refrigerant is decompressed by the heating expansion valve 86. The decompressed refrigerant is guided to the dehumidifying and cooling evaporator 18. The refrigerant exchanges heat with air taken from outside the housing 12 in the dehumidifying and cooling evaporator 18. That is, the air is cooled and the refrigerant evaporates.

  The air conditioning system 70 and the air conditioner 80 in the second embodiment include a cooling expansion valve 85 and a heating expansion valve 86 at required positions instead of the four-way valve. Thereby, an air conditioning system can be comprised, without using the four-way valve which leads to an increase in apparatus cost. Further, the use of a four-way valve complicates the system structure, but the system can be simplified by replacing the expansion valves 85 and 86.

In addition, when a refrigerant (for example, CO ₂ ) requiring high pressure is used, it may be difficult to use a four-way valve. However, the air conditioning system 70 and the air conditioner 80 are effective because they can be configured without using a four-way valve.

  In 2nd Embodiment, although the air-conditioning system 70 provided with the water type | mold radiation panel 30 was demonstrated to the example, a pneumatic type radiation panel may be sufficient.

  FIG. 9 is a configuration diagram showing an air conditioning system and an air conditioner as a modified example of the second embodiment including the pneumatic radiating panel 60.

  The air conditioning system 90 and the air conditioner 91 shown in FIG. 9 are different from the air conditioning system 70 and the air conditioner 80 shown in FIG. 8 in that the radiation panel is a pneumatic radiation panel 60. Configurations and portions corresponding to the air conditioning systems 1, 50, 70 and the air conditioners 10, 51, 80 of the first and second embodiments are denoted by the same reference numerals, and redundant description is omitted.

  The air conditioning system 90 and the air conditioner 91 provided with such a pneumatic radiating panel 60 can also have the same operations and effects as the air conditioning system 70 and the air conditioner 80 in the second embodiment.

  In each embodiment, the dehumidifying and cooling evaporator 18 dehumidifies the air in the air-conditioned space having a room temperature of 30 ° C. to 35 ° C. and a humidity of 60% to 80% to a temperature of 24 ° C. to 27 ° C. and a humidity of 40% to 70%. What is necessary is just a grade which has the capability to cool. Moreover, the condenser 15 should just have the capability to heat the air mentioned above and the air dehumidified and cooled by the dehumidification cooling evaporator 18 to 30 to 35 degreeC.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, in the refrigerant circuit, the order of the radiant air conditioning evaporator 17 and the dehumidifying cooling evaporator 18 may be switched. If the air blower 22 provided downstream of the condenser 15 in the air conditioner can form the air flow described in each embodiment, the air blower 22 is provided upstream of the reheat air passage 20 and the bypass air passage 21 and upstream of the condenser 15. It may be arranged, and the number is not limited to one.

1, 40, 50, 70, 90 Air-conditioning system 10, 41, 51, 80, 91 Air-conditioner 11, 42, 81 Refrigerant circuit 12 Housing 13 Compressor 14 Four-way valve 15 Condenser 16 Expansion valve 17 Radiation air-conditioning evaporator 18 Dehumidifying and cooling evaporator 20 Reheat air passage 21 Bypass air passages 22 and 54 Blower 25 Heat medium circulation circuit (circulation circuit)
26 Pump 30 Water type radiation panel (radiation panel)
31 Inlet pipe 32 Outlet pipe 43 Dehumidifier blower 44 Waste heat blower 53 Radiation air-conditioning air passage 60 Pneumatic radiant panel (radiant panel)
62 Duct 85 Expansion valve 86 for cooling Expansion valve for heating

Claims (7)

A refrigerant circuit comprising a compressor, a condenser, an expansion valve, an evaporator for radiation air conditioning, and an evaporator for dehumidifying cooling, and circulating a refrigerant;
A housing that houses the refrigerant circuit;
A radiant panel that radiates and air-conditions with a heat medium that is connected to the housing and exchanges heat in the radiant air-conditioning evaporator;
Air is taken from outside the casing, a part of the air is guided to the dehumidifying and cooling evaporator to be dehumidified and cooled, and a part of the dehumidified and cooled air and the other air are guided to the condenser and heated. And an air blower that discharges outside the casing. The radiant panel is a water radiant panel,
2. The air conditioning system according to claim 1, wherein the water radiating panel is connected to the housing by two water conduits that circulate water between the radiant air conditioning evaporator and the water radiating panel. The radiant panel is a pneumatic radiant panel;
2. The air conditioning system according to claim 1, wherein the pneumatic radiant panel is connected to the casing by a duct that guides air, which is guided from outside the casing and heat-exchanged by the radiant air conditioning evaporator, into the pneumatic radiating panel. .   The air conditioning system according to any one of claims 1 to 3, wherein the radiation panel is a partition. The refrigerant circuit further includes a four-way valve that switches the flow of the refrigerant,
The air conditioning system according to any one of claims 1 to 4, wherein the air conditioning system performs a cooling operation and a heating operation by switching the four-way valve. The refrigerant circuit further includes two expansion valves that can be controlled to open and close,
The air conditioning system according to any one of claims 1 to 4, wherein the air conditioning system performs a cooling operation and a heating operation by controlling the expansion valve. A refrigerant circuit comprising a compressor, a condenser, an expansion valve, an evaporator for radiation air conditioning, and an evaporator for dehumidifying cooling, and circulating a refrigerant;
A housing that houses the refrigerant circuit;
Air is taken from outside the housing, a part of the air is guided to the dehumidifying and cooling evaporator to be dehumidified and cooled, and a part of the dehumidified and cooled air and the other air are guided to the condenser and heated. And an air blower that discharges outside the casing.

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