Cooling system

Abstract

To enhance cooling efficiency of air in a facility compared to the case where air outside the facility is taken in and the taken-in air is cooled and supplied to inside of the facility.SOLUTION: A cooling system is used in a facility having both cold demand and heat demand, and includes: a heat pump device that has a refrigerant circuit including an evaporator for exchanging heat between a refrigerant and outside air, a compressor for compressing the refrigerant, a condenser for exchanging heat between the refrigerant and a heating target and an expansion mechanism for expanding the refrigerant compressed by the compressor and that derives heat of outside air by using the refrigerant circuit; and a cooler for taking in cold air that has been deprived of heat by the heat pump device and discharged and cooling and introducing the cold air into a facility.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cooling system. [Background technology]

[0002] Patent document 1 describes an indirect evaporative air conditioner that has an air conditioning core in which wet channels for causing evaporation and dry channels through which the air to be cooled passes are arranged alternately, separated by a base with a moist layer that retains water on the wet channel side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-53531 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, there are cooling devices such as indirect evaporative air conditioners that take in air from outside the facility, cool it, and supply it to the facility. When trying to cool the air inside the facility using a cooling device that cools outside air and introduces it into the facility, there are cases where the required cooling effect cannot be obtained, for example, when taking in and cooling hot and humid outside air in the summer. The present invention aims to improve the cooling efficiency of air inside a facility compared to when air outside the facility is taken in, cooled, and supplied inside the facility. [Means for solving the problem]

[0005] The invention described in claim 1 is a cooling system used in a facility where demand for cold and hot heat coexists, and is equipped with a refrigerant circuit including an evaporator that exchanges heat between a refrigerant and outside air, a compressor that compresses the refrigerant, a condenser that exchanges heat between the refrigerant and an object to be heated, and an expansion mechanism that expands the refrigerant compressed by the compressor, a heat pump device that removes heat from outside air using the refrigerant circuit, and a cooling device that takes in the cold air that has been removed heat by the heat pump device and discharged, cools it, and introduces it into the facility. The invention described in claim 2 is a cooling system described in claim 1, in which the cooling device is an air cooler having a core portion in which a first passage that introduces the cold air into the facility and a second passage that has a wall inside that holds water and causes evaporation are arranged. A third aspect of the present invention is the cooling system of the second aspect, wherein the cool air is introduced into the first passage and also into the second passage. The invention described in claim 4 is the cooling system described in claim 2, which includes an air conditioner that controls the humidity of the air, and the cool air is introduced into the first passage after passing through the air conditioner. The invention described in claim 5 is the cooling system described in claim 1, wherein the facility is a facility in which the demand for hot heat is greater than the demand for cold heat. The invention of claim 6 is the cooling system of claim 1, wherein the cooling device is an air conditioner that processes outside air. [Effects of the Invention]

[0006] According to the invention of claim 1, the efficiency of cooling the air inside the facility can be improved compared to when air outside the facility is taken in, cooled, and supplied into the facility. According to the invention of claim 2, the air in the facility can be cooled without increasing the humidity. According to the invention of claim 3, the cooling efficiency of the air inside the facility can be improved compared to when air outside the facility is introduced into the second passage. According to the invention of claim 4, it is possible to control the humidity of the air supplied into the facility. According to the invention of claim 5, the cooling efficiency of the air in the facility can be improved compared to when the demand for hot heat is lower than the demand for cold heat. According to the invention of claim 6, the cooling efficiency of the air inside the facility can be improved compared to when air outside the facility is supplied into the facility. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram illustrating a configuration example of a cooling system according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating an example of the configuration of a heat pump device and a heat utilization device according to an embodiment of the present invention. [Figure 3] 3 is a diagram illustrating a configuration example of a cooling core unit according to the present embodiment. FIG. [Figure 4] FIG. 2 is a diagram schematically showing a cross section of a cooling core part according to the present embodiment. [Figure 5] FIG. 10 is a diagram showing the air cooling effect when the cooling system according to the present embodiment is used. [Figure 6] FIG. 10 is a diagram illustrating a configuration example of a cooling system according to a modified example. [Figure 7] FIG. 10 is a diagram showing an example of the configuration of a desiccant air conditioner according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. <Cooling system configuration> FIG. 1 is a diagram showing an example of the configuration of a cooling system 1 according to this embodiment. The cooling system 1 according to this embodiment is used in a facility 10 where demand for cold heat and demand for hot heat coexist. The facility 10 where demand for cold heat and demand for hot heat coexist is, for example, a facility where demand for hot water supply from a boiler or the like occurs during operation of the facility 10, and demand for cold heat such as air conditioning also occurs. The facility 10 may be, for example, an industrial facility such as a food factory.

[0009] The cooling system 1 includes a heat pump device 30, a cooling device 50, and a heat utilization device . The heat pump unit 30 includes a refrigerant circuit 40. The refrigerant circuit 40 compresses and circulates a refrigerant therein. Examples of refrigerants that can be filled into the refrigerant circuit 40 include carbon dioxide and propane. The heat pump unit 30 heats an object to be heated by utilizing the temperature change characteristics of the refrigerant that accompany pressure changes. The heat pump unit 30 takes in air outside the facility 10 (hereinafter referred to as "outside air"), removes heat from the outside air using the refrigerant circuit 40, and discharges cool air. The air discharged from the heat pump unit 30 is introduced into the cooling unit 50 via piping or the like.

[0010] The heat pump device 30 uses heat taken from the outside air by the refrigerant circuit 40 to heat an object to be heated. In the example shown in Fig. 1, the heat pump device 30 is used to operate a heat utilization device 70. Examples of the heat utilization device 70 include a washing machine and a heating device. The heat utilization device 70 will be described in detail later.

[0011] The cooling device 50 takes in the air that has had heat removed by the heat pump device 30 and is discharged, cools it, and introduces it into the room of the facility 10. The heat pump device 30 and the cooling device 50 are connected by, for example, piping. The air discharged from the heat pump device 30 passes through the piping and is introduced into the air inlet of the cooling device 50. The following describes a case where an indirect evaporative air cooler is used as the cooling device 50. An indirect evaporative air cooler is an air conditioner that cools air by indirectly utilizing the heat of evaporation, and can cool the air to be cooled without increasing the humidity. The indirect evaporative air cooler has a cooling core part in which dry side passages and wet side passages are arranged alternately. This cooling core part will be described in detail later.

[0012] FIG. 2 is a diagram showing an example of the configuration of the heat pump unit 30 and the heat utilization unit 70 according to this embodiment. The heat pump device 30 includes a heat source unit 31 and a refrigerant circuit 40. The refrigerant circuit 40 includes an air heat exchanger 41, a compressor 42, a heat exchanger 43, and an expansion valve 44. The heat source unit 31 incorporates the refrigerant circuit 40 and a portion of the hot water supply circuit 71.

[0013] The air heat exchanger 41 exchanges heat between the outside air taken into the heat pump unit 30 and the refrigerant circuit 40. When the refrigerant circuit 40 and the hot water supply circuit 71 function as a hot water supply system, the air heat exchanger 41 functions as an evaporator. In this case, heat is removed from the outside air taken into the heat pump unit 30 in the air heat exchanger 41. The heat source unit 31 includes a fan 32 and an air outlet 33. The outside air from which heat has been removed in the air heat exchanger 41 is discharged by the fan 32 from the air outlet 33. The discharged air is introduced into the cooling device 50 via piping or the like.

[0014] The compressor 42 draws in refrigerant from its suction side, compresses the drawn refrigerant, and discharges the compressed refrigerant from its discharge side. The compressor 42 may be provided with an accumulator on its suction side that separates the refrigerant into gas and liquid. The heat exchanger 43 exchanges heat between the refrigerant circuit 40 and the hot water supply circuit 71. When the refrigerant circuit 40 and the hot water supply circuit 71 function as a hot water supply system, the heat exchanger 43 functions as a condenser. In this case, the water flowing through the pipes of the hot water supply circuit 71 is heated by removing heat from the refrigerant circuit 40. The expansion valve 44 is configured to have a variable opening degree and has the function of expanding the refrigerant by reducing the pressure of the refrigerant circulating in the refrigerant circuit 40. The expansion valve 44 is an example of an expansion mechanism.

[0015] The heat utilization device 70 includes a hot water supply circuit 71 that exchanges heat with the refrigerant circuit 40. The hot water supply circuit 71 is filled with, for example, water. The hot water supply circuit 71 exchanges heat with the refrigerant circuit 40 and provides a function that utilizes the heat exchange. The hot water utilization device 70 is a device that performs, for example, hot water supply and heating functions using water in a hot water supply circuit 71 that has been heated by the refrigerant circuit 40. The hot water utilization device 70 includes, for example, a tank for storing hot water and a heat exchanger. The hot water stored in the tank is heated by heat exchange with the water in the hot water supply circuit 71 and is used to supply hot water. When the hot water stored in the tank is used, it is replenished with city water or the like.

[0016] The hot water supply circuit 71 exchanges heat with the refrigerant circuit 40 via the heat exchanger 43. The water circulating through the hot water supply circuit 71 is heated by absorbing heat from the refrigerant circuit 40. The water flowing through the piping of the hot water supply circuit 71 is given a driving force by a pump 72 and circulates within the piping. 2 shows a configuration in which the refrigerant circuit 40 and the hot water supply circuit 71 exchange heat, but the present invention is not limited to this. For example, a supply unit (not shown) having a refrigerant circuit may be provided between the refrigerant circuit 40 and the hot water supply circuit 71. The supply unit has the same configuration as the refrigerant circuit 40, and providing the supply unit enables more heat to be supplied to the heat utilization device 70.

[0017] FIG. 3 is a diagram showing an example of the configuration of the cooling core unit 60 according to this embodiment. The cooling core 60 has a configuration in which dry-side passages 61 that introduce the air to be cooled into the room of the facility 10 and wet-side passages 62 that have wet walls 67 (see FIG. 4) that retain water inside and cause evaporation are arranged alternately. The dry-side passages 61 are an example of a first passage. The wet-side passages 62 are an example of a second passage.

[0018] The cooling core 60 is configured by hollow plates (hereinafter referred to as "hollow plates 68" (see FIG. 4)) made of moisture-proof resin that does not allow moisture to pass through. The dry-side passages 61 and the wet-side passages 62 are arranged alternately via the hollow plates 68, and heat exchange is performed via the hollow plates 68. The dry-side passage 61 has a dry inlet 63 and a dry outlet 64. The air outlet 33 (see FIG. 2) of the heat pump unit 30 and the dry inlet 63 of the cooling core unit 60 are connected by piping. The cool air discharged from the air outlet 33 is introduced into the dry-side passage 61 from the dry inlet 63, discharged from the dry outlet 64, and introduced into the room of the facility 10 to perform the cooling function. When introducing cool air into the dry-side passage 61, for example, the exhaust air of an air conditioner cannot be introduced into a room because it has a high concentration of carbon dioxide. However, the air discharged from the air outlet 33 is cooled outside air, not air discharged from the room, and can be introduced into the room of the facility 10.

[0019] The wet-side passage 62 has a wet inlet 65 and a wet outlet 66. The air outlet 33 (see FIG. 2) of the heat pump unit 30 and the wet inlet 65 of the cooling core unit 60 are connected by piping. Air discharged from the air outlet 33 is introduced into the wet-side passage 62 through the wet inlet 65 and is discharged outside the facility 10 through the wet outlet 66. 3, the wet inlet 65 and the wet outlet 66 are provided in a different direction from the dry inlet 63 and the dry outlet 64 in the cooling core 60, but are not limited to this. For example, the wet inlet 65 and the dry inlet 63 may be provided in the same direction.

[0020] The air discharged from the air outlet 33 is introduced into the dry-side passage 61 and also into the wet-side passage 62. Because the air discharged from the air outlet 33 has lower humidity than the outside air, evaporation is more likely to occur in the wet-side passage 62 than when outside air is introduced into the wet-side passage 62. In addition, because the air discharged from the air outlet 33 has a lower temperature than the outside air, the efficiency of heat exchange can be improved compared to when outside air is introduced into the wet-side passage 62.

[0021] 4 is a diagram schematically illustrating a cross section of the cooling core section 60 according to this embodiment. In FIG. 4, the positional relationship between the dry inlet 63 and the dry outlet 64 and the wet inlet 65 and the wet outlet 66 is illustrated differently from that in FIG. 3 for simplification. 4, the dry-side passage 61 and the wet-side passage 62 are adjacent to each other across a hollow plate 68. A wet wall 67 that retains water is provided on at least a portion of the surface of the hollow plate 68 facing the wet-side passage 62. The wet wall 67 is made of, for example, a hydrophilic cloth. The wet wall 67 may contain a water absorbent such as silica gel. Water is supplied to the wet wall 67 by, for example, spraying water from the wet inlet 65 and the wet outlet 66. A pipe for supplying water to the wet wall 67 may be provided.

[0022] Air discharged from the air outlet 33 (see FIG. 2) of the heat pump unit 30 is introduced into the dry-side passage 61 through the dry inlet 63, and is also introduced into the wet-side passage 62 through the wet inlet 65. The air introduced into the wet-side passage 62 causes evaporation in the wet wall 67. At this time, the air flowing through the adjacent dry-side passage 61 via the hollow plate 68 loses heat and is cooled. The wet-side passage 62 is provided with, for example, a fan for causing evaporation, and the evaporation occurs at the wet wall 67 when air is sent in by the fan.

[0023] The air flowing through the wet-side passage 62 absorbs heat from the air flowing through the dry-side passage 61 and is discharged from the wet outlet 66. The air discharged from the wet outlet 66 is discharged outside the facility 10. On the other hand, the air flowing through the dry-side passage 61 loses heat due to the air flowing through the wet-side passage 62, is cooled, and is discharged from the dry outlet 64. The air discharged from the dry outlet 64 is introduced into the room of the facility 10.

[0024] <Cooling system operation> The cooling system 1 can increase the efficiency of cooling indoor air when there is both a demand for heat in the heat utilization device 70 and a demand for cold in the cooling device 50. In other words, the cooling system 1 can increase the efficiency of cooling indoor air when both the heat utilization device 70 and the cooling device 50 are operating. The operation of the cooling system 1 when both the heat utilization device 70 and the cooling device 50 are operating will be described below.

[0025] When both the heat utilization device 70 and the cooling device 50 are operating, outside air is first introduced into the heat pump device 30, and heat exchange occurs in the air heat exchanger 41 of the refrigerant circuit 40. The refrigerant circulating in the refrigerant circuit 40 is heated in the air heat exchanger 41, compressed by the compressor 42, and flows into the heat exchanger 43. Heat is removed from the refrigerant in the heat exchanger 43, and the refrigerant passes through the expansion valve 44 and flows into the air heat exchanger 41.

[0026] The water flowing through the piping of the hot water supply circuit 71 is heated by removing heat from the refrigerant circuit 40 in the heat exchanger 43. The water flowing through the piping of the hot water supply circuit 71 is driven by a pump 72 to circulate and is used by the heat utilization device 70. The air that has had its heat removed and been cooled in the air heat exchanger 41 is discharged from the air outlet 33 and introduced into the cooling device 50. The air introduced into the cooling device 50 is introduced into the dry-side passage 61 and the wet-side passage 62 of the cooling core unit 60. The air introduced into the dry-side passage 61 is cooled and introduced into the room of the facility 10, where it performs the cooling function. Meanwhile, the air introduced into the wet-side passage 62 removes heat from the air flowing through the dry-side passage 61 and is discharged from the wet outlet 66.

[0027] Next, the operation of the cooling system 1 when the heat utilization device 70 is operating and the cooling device 50 is stopped will be described. When the heat utilization device 70 is operating and the cooling device 50 is stopped, outside air is first introduced into the heat pump device 30, and heat exchange occurs in the air heat exchanger 41 of the refrigerant circuit 40. The refrigerant circulating in the refrigerant circuit 40 is heated in the air heat exchanger 41, compressed by the compressor 42, and flows into the heat exchanger 43. Heat is removed from the refrigerant in the heat exchanger 43, and the refrigerant passes through the expansion valve 44 and flows into the air heat exchanger 41.

[0028] The water flowing through the piping of the hot water supply circuit 71 is heated by removing heat from the refrigerant circuit 40 in the heat exchanger 43. The water flowing through the piping of the hot water supply circuit 71 is driven by a pump 72 to circulate and is used by the heat utilization device 70. When the cooling device 50 is stopped, the air that has had heat removed and been cooled in the air heat exchanger 41 is discharged outside the facility 10.

[0029] Next, the operation of the cooling system 1 when the heat utilization device 70 is stopped and the cooling device 50 is operating will be described. When the heat utilization device 70 is stopped and the cooling device 50 is operating, the refrigerant circuit 40 is stopped and heat exchange does not occur in the air heat exchanger 41. Therefore, outside air is introduced directly into the dry side passage 61 and the wet side passage 62 of the cooling core unit 60. The air introduced into the dry side passage 61 is cooled and introduced into the room of the facility 10, thereby performing the cooling function. On the other hand, the air introduced into the wet side passage 62 removes heat from the air flowing through the dry side passage 61 and is discharged from the wet outlet 66.

[0030] <Air cooling effect> FIG. 5 is a diagram showing the air cooling effect when the cooling system 1 according to this embodiment is used. 5 shows the dry-bulb temperature (°C), wet-bulb temperature (°C), absolute humidity (g / kg), and relative humidity (%RH) at locations indicated by numbers 1 to 7 under conditions A to C. The dry-bulb temperature (°C), wet-bulb temperature (°C), absolute humidity (g / kg), and relative humidity (%RH) may be referred to as "indices" below.

[0031] The values ​​of each index shown in FIG. 5 are simulation values ​​that expand on experimental data obtained at the laboratory level. Condition A shows the index when outside air is introduced into the cooling core unit 60. Conditions B and C show the index when outside air is introduced into the heat pump unit 30 and the air discharged from the heat pump unit 30 is introduced into the cooling core unit 60. Condition B shows the index when the dry-bulb temperature of the air introduced into the cooling core unit 60 is 27.0°C, and condition C shows the index when the dry-bulb temperature of the air introduced into the cooling core unit 60 is 22.0°C. In other words, FIG. 5 shows the index when the temperature of the air introduced into the cooling core unit 60 is 33.0°C, 27.0°C, and 22.0°C.

[0032] Number 1 indicates the index of outside air under each condition. Number 2 indicates the index of air introduced into the dry inlet 63 of the cooling core section 60, and number 3 indicates the index of air discharged from the dry outlet 64 of the cooling core section 60. Number 4 indicates the index of air introduced into the wet inlet 65 of the cooling core section 60, and number 5 indicates the index of air discharged from the wet outlet 66 of the cooling core section 60. Since the air discharged from the wet outlet 66 of the cooling core section 60 is introduced into the room of the facility 10, number 5 indicates the index of air introduced into the room of the facility 10.

[0033] Number 6 indicates the difference in dry bulb temperature between the outside air and the air discharged from the dry outlet 64. Number 7 indicates the difference in dry bulb temperature between the air introduced into the dry inlet 63 and the air discharged from the dry outlet 64. The values ​​shown in numbers 6 and 7 under condition A are the temperature drop in the cooling core section 60 when outside air is introduced into the cooling core section 60. If the dry-bulb temperature of the outside air introduced into the cooling core section 60 is 33.0°C, the temperature drops by 3.4°C in the cooling core section 60 and the air is introduced into the room of the facility 10.

[0034] The value shown by number 6 under condition B indicates the temperature that the outside air drops to when it is cooled using the cooling system 1 according to this embodiment before being introduced into the room of the facility 10. Under condition B, if the dry-bulb temperature of the outside air introduced into the heat pump unit 30 is 33.0°C, the temperature drops by 11.1°C in the heat pump unit 30 and the cooling core unit 60 before being introduced into the room of the facility 10. The value shown by number 7 under condition B indicates the temperature that the air introduced from the heat pump unit 30 into the cooling core unit 60 drops to in the cooling core unit 60 when the outside air is cooled using the cooling system 1 according to this embodiment. Under condition B, if the dry-bulb temperature of the air introduced into the cooling core unit 60 is 27.0°C, the temperature drops by 5.1°C in the cooling core unit 60 and the air is introduced into the room of the facility 10.

[0035] The value shown by number 6 under condition C indicates the temperature that the outside air drops to when it is cooled using the cooling system 1 according to this embodiment before being introduced into the room of the facility 10. Under condition C, if the dry-bulb temperature of the outside air introduced into the heat pump unit 30 is 33.0°C, the temperature drops by 15.0°C in the heat pump unit 30 and the cooling core unit 60 before being introduced into the room of the facility 10. The value shown by number 7 under condition C indicates the temperature that the air introduced from the heat pump unit 30 into the cooling core unit 60 drops to in the cooling core unit 60 when the outside air is cooled using the cooling system 1 according to this embodiment. Under condition C, if the dry-bulb temperature of the air introduced into the cooling core unit 60 is 22.0°C, the temperature drops by 5.1°C in the cooling core unit 60 and the air is introduced into the room of the facility 10.

[0036] As shown by number 6 under condition C, it is expected that the use of the cooling system 1 according to this embodiment will cool the outside air by 15.0°C. 3 When introducing air with a volume of 1000m into a room, the cooling heat required to cool the air from 33°C to 18°C ​​is 20.2kW. The cooling heat is calculated based on the air flow rate (4000m 3 / h) with temperature difference (15°C), specific heat of air (0.24kcal / kg°C), and air density (1.2kg / m 3 ) can be calculated by multiplying

[0037] Cooling by the cooling core unit 60 requires fan power to cause evaporation in the wet-side passage 62. For example, supplying 0.48 L of water per minute and evaporating it requires approximately 1.3 kW of power consumption. In this case, the energy consumption efficiency (COP) can be calculated as 15.5 from (cooling heat amount 20.2 kW) / (power consumption 1.3 kW). The COP of a typical conventional outdoor air cooler is approximately 3, so this invention can improve energy consumption efficiency by approximately five times. In this way, the present invention can improve the air cooling efficiency by introducing cold air discharged from the heat pump unit 30, which was not previously used, into the cooling device 50.

[0038] The shorter the length of the piping connecting the air outlet 33 of the heat pump unit 30 and the cooling core unit 60, the higher the air cooling efficiency of the cooling system 1. The longer the piping, the higher the temperature of the air cooled by the air heat exchanger 41 becomes before it is introduced into the cooling core unit 60, reducing the cooling efficiency. The piping connecting the heat pump unit 30 and the cooling core unit 60 is designed so that the temperature rise of the air passing through the piping does not exceed the amount of cooling achieved by the air heat exchanger 41. For example, by arranging the air outlet 33 of the heat pump unit 30 and the cooling core unit 60 adjacent to each other, the air cooling efficiency can be improved.

[0039] Furthermore, when the heat pump unit 30 is not operating, the air is not cooled by the air heat exchanger 41. When the heat pump unit 30 is stopped, outside air is directly introduced into the cooling core unit 60 of the cooling device 50. Therefore, the longer the operating time of the heat pump unit 30, the more efficiently the cooling system 1 can cool the air. For example, if the facility 10 is a facility that constantly has demand for cold and hot heat, stable improvement in cooling efficiency can be achieved. The facility 10 may be a facility that constantly generates demand for hot water from a boiler or the like during operation, and also generates demand for cold heat from air conditioning or the like. Furthermore, if the facility 10 is a facility where the demand for hot heat is greater than the demand for cold heat, the heat pump unit 30 is less likely to stop and only the cooling unit 50 is operating, compared to a facility where the demand for hot heat is less than the demand for cold heat. When the heat pump unit 30 is operating while the cooling unit 50 is operating, the air cooling efficiency of the cooling system 1 can be improved.

[0040] <Modification> The cooling system 2 according to the modified example has a function of controlling the humidity of the air introduced into the room of the facility 10 in addition to a function of cooling the air. 6 is a diagram showing an example of the configuration of a cooling system 2 according to a modified example. Components similar to those of the cooling system 1 will be described with the same reference numerals.

[0041] The cooling system 2 according to the modified example includes a heat pump unit 30, a cooling unit 50, and a heat utilization unit 70. The cooling unit 50 of the cooling system 2 differs from the cooling system 1 in that it includes a desiccant air conditioner 80. The desiccant air conditioner 80 is an air conditioner that has the function of controlling the humidity of the air. In the cooling system 2, air discharged from the air outlet 33 (see FIG. 2) of the heat pump unit 30 is introduced into the cooling unit 50 via piping or the like. The air introduced into the cooling unit 50 passes through a desiccant air conditioner 80 and then is introduced into the cooling core unit 60.

[0042] FIG. 7 is a diagram showing an example of the configuration of a desiccant air conditioner 80 according to a modified example. The desiccant air conditioner 80 includes a desiccant rotor 81 and a regeneration heater 82. The desiccant rotor 81 is a rotor carrying an adsorbent such as silica gel or zeolite, and absorbs moisture from the air. The regeneration heater 82 regenerates the function of the adsorbent by blowing warm air into the desiccant rotor 81.

[0043] The desiccant air conditioner 80 removes moisture from the air by repeatedly performing a dehumidification process, which dehumidifies the air, and a regeneration process, which regenerates the desiccant rotor 81 that has adsorbed moisture. In the dehumidification process, the desiccant rotor 81 adsorbs moisture from the air to dehumidify it. In the regeneration process, the moisture adsorbed by the desiccant rotor 81 is desorbed using air heated by a regeneration heater 82, and the desiccant rotor 81 is regenerated to a state where it can absorb moisture. The desiccant rotor 81 rotates so that the dehumidification process and regeneration process are continuously repeated.

[0044] Air introduced into the cooling device 50 from the air outlet 33 of the heat pump unit 30 is dehumidified by passing through the desiccant rotor 81 of the desiccant air conditioner 80. The dehumidified air is introduced into the dry inlet 63 of the cooling core unit 60 (see FIG. 3). The dehumidified air may also be introduced into the wet inlet 65 of the cooling core unit 60. The air introduced into the dry inlet 63 is cooled in the cooling core unit 60, discharged from the dry outlet 64, and introduced into the room of the facility 10.

[0045] As described above, the cooling device 50 according to the modified example is equipped with a desiccant air conditioner 80 that controls the humidity of the air, and functions as an outdoor air conditioner that processes outside air and introduces it into the rooms of the facility 10. Furthermore, the cooling of the air in the cooling core unit 60 can be performed without increasing the humidity of the air to be cooled. In the modified example, by combining the desiccant air conditioner 80 and the cooling core unit 60, low-humidity air can be introduced into the rooms of the facility 10. Although the modified example shows an example in which the humidity of the air is controlled by the desiccant air conditioner 80, the present invention is not limited to this. The humidity of the air may be controlled by other methods, such as cooling the air with a cooling coil or the like, and removing moisture by condensation. [Explanation of symbols]

[0046] 1... cooling system, 30... heat pump device, 50... cooling device, 60... cooling core part, 70... heat utilization device, 80... desiccant air conditioner

Claims

1. Used in facilities where demand for both cold and heat coexists, a heat pump device that removes heat from the outside air using the refrigerant circuit, the heat pump device comprising a refrigerant circuit including an evaporator that performs heat exchange between a refrigerant and outside air, a compressor that compresses the refrigerant, a condenser that performs heat exchange between the refrigerant and an object to be heated, and an expansion mechanism that expands the refrigerant compressed by the compressor; a cooling device that takes in the cold air that is removed by the heat pump device and discharged, cools it, and introduces it into the facility; A cooling system comprising:

2. 2. The cooling system according to claim 1, wherein the cooling device is an air cooler having a core in which a first passage for introducing the cold air into the facility and a second passage having a wall for retaining water inside and causing evaporation are arranged.

3. The cooling system according to claim 2 , wherein the cool air is introduced into the first passage and also into the second passage.

4. The cooling system according to claim 2 , further comprising an air conditioner that controls humidity of the air, and the cool air is introduced into the first passage after passing through the air conditioner.

5. The cooling system according to claim 1 , wherein the facility is a facility in which the demand for hot heat is greater than the demand for cold heat.

6. The cooling system according to claim 1 , wherein the cooling device is an air conditioner that processes outside air.

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