Cooling device

Abstract

To provide a cooling device which enables improvement of heat radiation performance of a radiator and a condenser in the cooling device and also enables efficient operation.SOLUTION: A cooling device 1A includes: a blower 2; an outdoor air cooling system which has a radiator 41 and utilizes outdoor air introduced by the blower to cool a liquid to be cooled (a cooled liquid); and a chiller cooling system which has a condenser 32 and cools the cooled liquid with a refrigeration cycle of the refrigerant. The cooling device 1A has a main air channel in which outdoor air introduced by the blower 2 passes through the radiator 41 and the condenser 32 in a written order to be exhausted. Further, a bypass air channel in which outdoor air introduced by the blower 2 passes through the condenser 32 to be exhausted without passing through the radiator 41 is formed in the cooling device 1A.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a cooling device that cools a cooled liquid returning from equipment to be cooled and supplies the cooled liquid to the equipment. [Background technology]

[0002] For example, in factory production lines and research facilities, chilled water at about 10°C to 30°C is required to ensure stable quality and performance of equipment, etc. Various cooling devices are known as devices that supply such chilled water to the equipment to be cooled.

[0003] For example, Patent Document 1 proposes an air-cooled cooling device. This cooling device is equipped with an outside air cooling system that cools the liquid to be cooled by blowing outside air through a radiator having a heat transfer tube through which the liquid to be cooled passes, and a chiller cooling system that has a compressor, a condenser, an expansion valve, and an evaporator to configure a refrigeration cycle, and cools the liquid to be cooled using these cooling systems.

[0004] In particular, the cooling device has a free cooling function that utilizes the low temperature environment of the outside air. Specifically, when the outside air temperature is low, the operation of the chiller cooling system is stopped and the cooled liquid is cooled by operating only the outside air cooling system (free cooling operation), and when the outside air temperature is high, the cooled liquid is cooled by operating only the chiller cooling system or by operating both the chiller cooling system and the outside air cooling system. In this way, in order to efficiently cool the cooled liquid, the operation mode is switched according to the outside air temperature. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2000-266447 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the conventional cooling device as described above, the condenser of the chiller cooling system is disposed inside the radiator of the outside air cooling system, and the outside air supplied from the side of the device by the blower is blown to the radiator and the condenser. Therefore, the specifications of the blower for cooling the radiator and the condenser require a fan with a large air volume and high static pressure. However, there is a trade-off between air volume and static pressure. For example, an axial fan has a large air volume but a low static pressure, and a multi-blade fan such as a sirocco fan can have a high static pressure but it is difficult to obtain a large air volume. Therefore, it is not easy to select a fan that ensures both air volume and static pressure at the same time. As a result, compared to a cooling device without a free cooling function, it is necessary to select a fan with a large blower motor output and a large blade diameter, and the power consumption of the fan tends to be large.

[0007] In a cooling device with a free cooling function, for example, during free cooling operation in winter, only the radiator needs to be cooled with outside air, and during operation of only the chiller cooling system in summer (especially during peak high temperatures), only the condenser needs to be cooled with outside air. In particular, in response to the recent rise in outside temperatures in summer, the condenser is required to have high heat dissipation performance so that operation of only the chiller cooling system can continue even at higher temperatures. However, no consideration has been given to air paths according to the operation mode.

[0008] The present invention has been made in consideration of the above circumstances, and has an object to provide a cooling device that can improve the heat dissipation performance of a radiator and a condenser and can operate efficiently. [Means for solving the problem]

[0009] The cooling device of the present invention is a cooling device comprising a blower, an outside air cooling system having a radiator and using outside air introduced by the blower to cool the cooled liquid, and a chiller cooling system having a condenser and cooling the cooled liquid by a refrigeration cycle of a refrigerant, and is characterized in that the cooling device has a main air passage through which the outside air introduced by the blower passes through the radiator and then the condenser before being exhausted, and also forms a bypass air passage through which the outside air introduced by the blower passes through either the radiator or the condenser and is exhausted without passing through the other.

[0010] The cooling device may have an openable / closable ventilation port communicating with a space between the radiator and the condenser, and a bypass air passage may be formed by opening the ventilation port. Furthermore, the ventilation port may be a ventilation port communicating between the space and the outside of the device, and the ventilation port may be opened to directly introduce outside air into the space, thereby forming a radiator bypass air passage that does not pass through the radiator as a bypass air passage.

[0011] The cooling device has a radiator-only operation mode in which cooling is performed only by the outside air cooling system, and a chiller-only operation mode in which cooling is performed only by the chiller cooling system, and the opening and closing of the ventilation openings may be controlled depending on these operation modes.

[0012] The bypass air passage may be formed by operating one of the components constituting the radiator or the condenser to create a gap in the radiator or the condenser.

[0013] The cooling device has a radiator-only operation mode in which cooling is performed only by the outside air cooling system, and a chiller-only operation mode in which cooling is performed only by the chiller cooling system, and the operation of the components may be controlled according to these operation modes.

[0014] In the cooling device, the height regions in which the condenser and the radiator are disposed do not have to overlap.

[0015] The cooling device of the present invention is a cooling device equipped with a blower, an outside air cooling system which has a radiator and uses outside air introduced by the blower to cool the cooled liquid, and a chiller cooling system which has a condenser and cools the cooled liquid by a refrigeration cycle of a refrigerant, and the cooling device has an air path through which the outside air introduced by the blower passes through the radiator and condenser in that order before being exhausted, and the blower, condenser, and radiator are arranged in that order from top to bottom in the vertical direction, and the height regions in which the condenser and radiator are arranged in the cooling device do not have to overlap.

[0016] The radiator may be configured with two plate members arranged in a V-shape when viewed from the side, and the condenser may have more plate members than the radiator and be arranged in a zigzag shape with the V-shapes connected together when viewed from the side. Effect of the Invention

[0017] According to the cooling device of the present invention, by adopting the above-mentioned configuration, the heat dissipation performance of the radiator and the condenser can be improved, and efficient operation becomes possible. [Brief description of the drawings]

[0018] [Figure 1] 1 is a schematic diagram of a basic configuration of a cooling device of the present invention. [Diagram 2] FIG. 2 is a schematic side view of the cooling device of the present invention. [Diagram 3] FIG. 4 is an explanatory diagram of a chiller-only operation mode in the cooling device of the present invention. [Figure 4] FIG. 4 is an explanatory diagram of a radiator-only operation mode in the cooling device of the present invention. [Diagram 5] FIG. 1 is a perspective view of a cooling device according to a first embodiment. [Figure 6] 6 is a schematic side view for explaining an outside air passage of the cooling device of FIG. 5. FIG. [Figure 7] 13A to 13C are schematic side views for explaining an outside air passage of a cooling device according to a second embodiment. [Figure 8] FIG. 13 is a schematic side view for explaining an outside air passage of a cooling device according to a third embodiment. [Figure 9]FIG. 13 is a schematic side view for explaining an outside air passage of a cooling device according to a fourth embodiment. [Figure 10] 1 is a graph showing the relationship between the annual outside temperature, the operation mode, and the air path. [Figure 11] FIG. 2 is a plan view of the cooling device unit as viewed from above. [Figure 12] FIG. 2 is a schematic side view of the cooling devices of the reference example and Examples 1 and 2. [Figure 13] 13 is a graph showing the results of high-pressure refrigerant in a chiller-only operation mode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The basic configuration of the cooling device of the present invention will be described with reference to Fig. 1 to Fig. 4. Fig. 1 is a schematic diagram of the entire system of the cooling device, Fig. 2 is a schematic side view of the cooling device, and Fig. 3 and Fig. 4 are explanatory diagrams of each operation mode.

[0020] 1, the cooling device 1 includes a blower 2, an outside air cooling system 4 that cools the cooled liquid L by using outside air introduced by the blower 2, and a chiller cooling system 3 that cools the cooled liquid L by a refrigeration cycle of a refrigerant. The cooled liquid L is circulated by a pump (not shown) through the equipment to be cooled and the cooling device 1. In the cooling device 1, the cooled liquid L is introduced from an inlet 11, cooled by the outside air cooling system 4 and / or the chiller cooling system 3, and then discharged from an outlet 12 and supplied to the equipment to be cooled.

[0021] The cooling device 1 is a rectangular parallelepiped device (see FIG. 2) with a blower 2 disposed at the upper end. As shown in FIG. 1, the blower 2 has a fan 21 and a motor 22. In FIG. 1, a plurality of blowers 2 are disposed in parallel. The blower 2 is connected to an inverter, and the rotation speed of the fan 21 is controlled.

[0022] The chiller cooling system 3 has a compressor 31, a condenser 32, an expansion valve 33, and an evaporator 34, which are connected to form a refrigerant circulation circuit. The refrigerant repeats a cycle in which it is compressed in the compressor 31, passes through a pipe, is liquefied in the condenser 32, releases heat, passes through the expansion valve 33, and evaporates inside the evaporator 34 to absorb heat (exchanges heat with the liquid to be cooled L). In the chiller cooling system 3, the liquid to be cooled L can be cooled by this refrigeration cycle of the refrigerant. The compressor 31 is connected to an inverter, and the motor rotation speed of the compressor 31 is controlled.

[0023] The outside air cooling system 4 cools the cooled liquid L by utilizing the outside air introduced by the blower 2. The outside air cooling system 4 has a radiator 41, a tank 42, a pump 43, and a heat exchanger 44, which are connected to form a circulation circuit for the antifreeze liquid. The antifreeze liquid exchanges heat with the cooled liquid L in the heat exchanger 44, and the antifreeze liquid whose temperature has increased by the heat exchange is air-cooled in the radiator 41 and is used again to cool the cooled liquid L. Note that the cooled liquid L may be guided to the radiator 41 and cooled in the radiator.

[0024] Next, the basic device configuration of the cooling device 1 will be described with reference to FIG. 2. For convenience of explanation, the side panel of the cooling device 1 is omitted in FIG. 2. As shown in FIG. 2, the cooling device 1 is provided with a blower 2, a condenser 32, and a radiator 41 arranged in this order from the top in the vertical direction. The cooling device 1 has an air passage through which the outside air introduced by the blower 2 passes from the air intake port 13 through the radiator 41 and the condenser 32 in this order and is exhausted. The radiator 41 and the condenser 32 are installed in series with respect to this air passage. This air passage is also called a main air passage in relation to a bypass air passage to be described later. A series of white arrows in FIG. 2 indicates the main air passage.

[0025] In the main air passage, outside air is supplied from air supply port 13 provided on the bottom surface or the like, and then passes through radiator 41 and is introduced into space S between radiator 41 and condenser 32. This space S is surrounded by the upper surface of radiator 41, the lower surface of condenser 32, and side panels (not shown) on both sides. There is no partition in space S. The outside air introduced into space S passes through condenser 32 and is introduced into space T between condenser 32 and exhaust port 14, and is exhausted via blower 2.

[0026] In this way, the cooling device 1 is configured to supply outside air from the bottom side and exhaust it from the top. In contrast, a conventional cooling device (see, for example, Patent Document 1) is configured to supply air from the side of the cooling device and exhaust it from the top. For example, there are concerns that the installation location of the conventional cooling device is limited because of the need to secure space in front of the side where air is supplied, and that the cooling device 1 is susceptible to weather such as rain and wind, but such concerns do not exist for the cooling device 1. In addition, the radiator 41 and the condenser 32 are arranged in the height direction, and the entire device is more easily made compact than conventional cooling devices. In addition, in order to smoothly supply air from the bottom side of the cooling device 1, it is preferable to provide legs (such as blocks) on the bottom surface of the cooling device 1.

[0027] In addition, in the cooling device 1, the height regions in which the condenser 32 and the radiator 41 are disposed do not overlap. In FIG. 2, the height region occupied by the zigzag shape of the condenser 32 and the height region occupied by the V-shape of the radiator 41 do not overlap. In addition, the cooling device 1 has a relatively large volume of the space S between the radiator 41 and the condenser 32 compared to conventional cooling devices. For example, the volume of the space S is 20% or more of the total volume of the space from the upper surface of the radiator 41 to the exhaust port 14, and may be 30% or more. By making the volume of the space S relatively large, for example, it becomes easier to ensure the size of the ventilation port 5 (see FIG. 5) described later.

[0028] In Fig. 2, the radiator 41 is composed of one or more components. Specifically, the radiator 41 has plate-like members 41a and 41b, which are configured to form a V-shape when viewed from the side. The plate-like members 41a and 41b may appropriately adopt a structure of a general radiator, for example, a structure in which a tube through which antifreeze passes and a wavy fin are overlapped. It is preferable that the shape of the fins is such that the heat dissipation area is large so as to achieve excellent heat dissipation.

[0029] In Fig. 2, in radiator 41, each of V-shaped plate members 41a, 41b is disposed at a predetermined angle α (for example, 30° to 50°) with respect to the vertical direction. Angle α is an acute angle. Blower 2 is located above these plate members 41a, 41b, and is configured so that outside air supplied from air inlet 13 by operation of blower 2 passes through radiator 41. Note that the plate members are not limited to being V-shaped, and the number of plates may be increased to form a zigzag shape like condenser 32.

[0030] The condenser 32 is composed of one or more components. Specifically, the condenser 32 has a plurality of plate-shaped members 32a to 32g, which are arranged in a zigzag shape in a side view of a V shape. The plate-shaped members 32a to 32g may have a structure of a general condenser, for example, a structure in which a refrigerant pipe through which a refrigerant passes is overlapped with a wavy fin. The condenser 32 has more plate-shaped members 32a to 32g than the plate-shaped members 41a and 41b of the radiator 41. Regarding the configuration of each plate-shaped member, the plate-shaped members 32a to 32g are shorter in the longitudinal direction and thinner than the plate-shaped members 41a and 41b of the radiator 41.

[0031] In FIG. 2, in the condenser 32, each of the plate-like members 32a to 32g is disposed at an inclination angle β (for example, 15° to 40°) with respect to the vertical direction. The angle β is an acute angle. In FIG. 2, the angle β is smaller than the angle α. In this case, while the radiator 41 is V-shaped, the number of plate-like members constituting the condenser 32 can be easily set to three or more, and the cooling efficiency of the chiller cooling system can be further improved. The relationship between the angles α and β is not limited to this. The blower 2 is located above these plate-like members 32a to 32g, and is configured so that the outside air of the space S passes through the condenser 32 by operating the blower 2.

[0032] The cooling device 1 is not particularly limited in configuration as long as it has an air passage through which outside air introduced by the blower 2 passes through the radiator 41 and the condenser 32 in this order and is then exhausted, and the configuration of each part is not particularly limited.

[0033] For example, the configurations of the radiator 41 and the condenser 32 can be appropriately set in consideration of the required heat transfer area. In this case, either the radiator or the condenser, or both the radiator and the condenser, may be configured to be arranged along the horizontal direction. From the viewpoint of miniaturization of the device, it is preferable to arrange these components at an incline with respect to the vertical direction as shown in Fig. 2 in order to increase the ventilation area of ​​the radiator and the condenser and perform heat exchange efficiently. Also, for example, one component may be curved and arranged in a substantially U-shape.

[0034] Next, a method of operating the cooling device of the present invention will be described. The cooling device 1 is a cooling device with a free cooling function, and executes three operation modes depending on the outside air temperature. Specifically, it executes (1) a combined operation mode using both the chiller cooling system 3 and the outside air cooling system 4, (2) a chiller-only operation mode performing cooling only by the chiller cooling system 3, and (3) a radiator-only operation mode (free cooling operation mode) performing cooling only by the outside air cooling system 4. The execution and switching of these operation modes are performed by a control device (not shown).

[0035] (1) The combined operation mode is an operation mode performed in the medium to high temperature season (intermediate season to summer), in which the chiller cooling system 3 is also used when the outside air temperature is relatively high and cooling is not possible using only the outside air cooling system 4. As shown in FIG. 1, the cooled liquid L introduced from the inlet 11 is cooled by the outside air cooling system 4, and then further cooled by the chiller cooling system 3.

[0036] (2) The chiller-only operation mode is performed when the outside air temperature becomes higher and is higher than the cooled liquid L (high temperature peak period). In this operation mode, as shown in Fig. 3, the compressor 31 of the chiller cooling system 3 is "ON" and the pump 43 of the outside air cooling system 4 is "OFF", and the cooled liquid L is cooled only by the chiller cooling system 3.

[0037] (3) The radiator-only operation mode is performed during low to medium temperature periods (winter to intermediate periods). In this operation mode, as shown in Fig. 4, the pump 43 of the outside air cooling system 4 is "ON" and the compressor 31 of the chiller cooling system 3 is "OFF", and the cooled liquid L is cooled only by the outside air cooling system 4.

[0038] Here, in the above-mentioned operation method of the cooling device 1, (1) in the combined operation mode, the radiator 41 and the condenser 32 need to be cooled with outside air, (2) in the chiller-only operation mode, only the condenser 32 needs to be cooled with outside air, and (3) in the radiator-only operation mode, only the radiator 41 needs to be cooled with outside air. In contrast, the main air passage shown in FIG. 2 passes through both the radiator 41 and the condenser 32, and is not necessarily an efficient air passage in each operation mode. One aspect of the present invention focuses on the fact that the parts that need air cooling differ depending on such operation mode, and enables efficient operation according to the operation mode by changing the air passage of the outside air in the cooling device.

[0039] Specifically, one embodiment of the cooling device of the present invention has a main air passage through which outside air introduced by a blower passes through a radiator and then a condenser before being exhausted, and also forms a bypass air passage through which the outside air introduced by the blower passes through either the radiator or the condenser and is exhausted without passing through the other. The bypass air passages include a radiator bypass air passage through which the outside air passes through the condenser without passing through the radiator and is exhausted, and a condenser bypass air passage through which the outside air passes through the radiator and is exhausted without passing through the condenser.

[0040] The cooling device forming each bypass air passage will be described below. Specifically, as a method for forming the bypass air passage, a method using a vent hole (first and second embodiments) and a method for operating a condenser or a radiator (third and fourth embodiments) will be described.

[0041] [First embodiment] The cooling device of the first embodiment is configured to form a radiator bypass air passage by utilizing a ventilation port. FIG. 5 shows a schematic perspective view of the cooling device 1A. The cooling device 1A is provided with a rectangular side panel 15 so as to cover the front and back of the space in which the condenser 32 is housed, and a substantially triangular side panel 16 so as to cover the front and back of the space S between the condenser 32 and the radiator 41. One side of the space S is sealed by the side panels 15 and 16, and the structure is isolated from the outside air. The side panels 15 and 16 may be formed of one member, not separate members.

[0042] Further, a storage section 17 is provided in the space below the radiator 41 in the lower part of the cooling device 1A. The storage section 17 stores the components of the chiller cooling system 3, the components of the outside air cooling system 4, various electrical systems, and the like.

[0043] As shown in FIG. 5, the cooling device 1A has a ventilation opening 5 in the side panel 16, which communicates the space S between the radiator 41 and the condenser 32 with the outside of the device. In FIG. 5, the ventilation opening 5 is provided at the center position in the width direction of the cooling device 1. The ventilation opening 5 can be opened and closed, for example, by motor drive under the control of a control device (not shown). The shape of the ventilation opening 5 is not limited to a circular shape, and may be any shape and size that can introduce outside air into the space S. In addition, the number of ventilation openings 5 ​​is not limited to one, and multiple ventilation openings may be provided. For example, when multiple ventilation openings are provided, a ventilation opening may be provided in one side panel and a ventilation opening may be provided in the opposite side panel. Furthermore, in this case, the positions of the ventilation openings in the width direction may be arranged so as not to overlap in the depth direction.

[0044] As will be shown in the examples described later, the cooling efficiency of the chiller cooling system tends to improve as the opening area of ​​the space S increases. For example, the opening area of ​​the vent 5 (the total area of ​​the vents if there are multiple vents) can be set to be two or less times the opening area of ​​the exhaust port 14. In addition, the opening / closing mechanism of the vent 5 is not particularly limited.

[0045] The ventilation port 5 is closed in the (1) combined operation mode, and is opened, for example, when the operation mode is switched to the (2) chiller-only operation mode. When the ventilation port 5 is opened, outside air is directly introduced into the space S between the radiator 41 and the condenser 32, and a radiator bypass air path that does not pass through the radiator 41 is formed.

[0046] FIG. 6 is a schematic side view for explaining the radiator bypass air passage. Note that the side panel is not shown in FIG. 6. The series of white arrows in FIG. 6 indicates the radiator bypass air passage. In the radiator bypass air passage, outside air is supplied from the ventilation port 5 and introduced into the space S without passing through the radiator 41. In this case, air is hardly supplied through the radiator 41. The outside air introduced into the space S passes through the condenser 32 in operation, is introduced into the space T between the condenser 32 and the exhaust port 14, and is exhausted from the exhaust port 14.

[0047] The opening area of ​​the ventilation opening 5 is appropriately controlled to an opening area that minimizes the passage of outside air through the radiator 41.

[0048] In this way, during chiller-only operation mode, a radiator bypass air passage is formed and mainly outside air passes through the radiator bypass air passage, thereby reducing the static pressure applied to the blower 2 under the same power and increasing the air volume, thereby improving the heat dissipation performance of the condenser 32.

[0049] [Second embodiment] The cooling device of the second embodiment is configured to form a condenser bypass air passage by utilizing a ventilation port. Fig. 7(a) shows a schematic side view (side panel omitted) for explaining the condenser bypass air passage, and Fig. 7(b) shows an AA cross-sectional view (side panel shown).

[0050] As shown in Fig. 7(b), in cooling device 1B, space S between radiator 41 and condenser 32 communicates with space U formed in a part of side panel 19. Space U is a space that spans side panel 15 and side panel 16 in Fig. 5. In Fig. 7(b), a partition wall 18 having an inverted triangular shape in a front view is disposed inside side panel 19 between space U and space T. In this configuration, cooling device 1B has ventilation opening 6 in partition wall 18 that communicates space S with space T via space U.

[0051] The ventilation opening 6 can be opened and closed, for example, by driving a motor under the control of a control device (not shown). As with the ventilation opening 5, the shape, size, opening and closing mechanism, etc. of the ventilation opening 6 are not particularly limited.

[0052] The ventilation port 6 is closed in the (1) combined operation mode, and is opened, for example, when the operation mode is switched to the (2) radiator-only operation mode. When the ventilation port 6 is opened, the outside air introduced into the space S and the space U is introduced into the space T between the condenser 32 and the exhaust port 14, forming a condenser bypass air passage that does not pass through the condenser 32. The series of white arrows in FIG. 7(a) indicate the condenser bypass air passage. The opening area of ​​the ventilation port 6 is appropriately controlled to an opening area that prevents the outside air from passing through the condenser 32 as much as possible.

[0053] In this way, in the radiator-only operation mode, a condenser bypass air passage is formed and mainly outside air passes through the condenser bypass air passage, thereby reducing the static pressure applied to the blower 2 under the same power and increasing the air volume, thereby improving the heat dissipation performance of the radiator 41.

[0054] Furthermore, the form in which a condenser bypass air passage is formed by utilizing a vent hole may be a further modification of the configuration of the cooling device 1B in Fig. 7. For example, the partition wall 18 may be configured to separate the space U from the space S, and a further vent hole different from the vent hole 6 may be provided in the partition wall at a location separating the space S from the space U. In the case of this configuration, the further vent hole and the vent hole 6 are opened to form a condenser bypass air passage.

[0055] The cooling devices of the first and second embodiments described above have an openable / closable ventilation port, and opening the ventilation port forms a new air passage, thereby eliminating the need for outside air to pass through either the radiator or the condenser. Note that the cooling device of the present invention may have either the ventilation port 5 in the first embodiment or the ventilation port 6 in the second embodiment, for example. In that case, in either the chiller-only operation mode or the radiator-only operation mode, outside air can be efficiently passed through, improving heat dissipation performance.

[0056] [Third embodiment] The cooling device of the third embodiment is configured to form a radiator bypass air passage by operating the components of the radiator. A schematic side view is shown in FIG. 8. In FIG. 8, the configuration shown by the dashed line shows the state before the radiator 41C is operated, and the configuration shown by the solid line shows the state after the radiator 41C is operated. As shown in FIG. 8, the radiator 41C has a pair of plate-like members 41a and 41b, which are configured in a V-shape in side view before the radiator 41C is operated. In this state, there is no gap between the pair of plate-like members 41a and 41b that can become an air passage.

[0057] When forming the radiator bypass air passage, the plate-shaped members 41a and 41b each rotate around the tip of the V-shape (the end on the condenser side) as a fulcrum. Specifically, the plate-shaped member 41a rotates clockwise, and the plate-shaped member 41b rotates counterclockwise. By moving the plate-shaped members 41a and 41b in this way, the overall shape of the radiator 41C is deformed, and a gap is formed between the plate-shaped members 41a and 41b, which are the base of the V-shape. In this way, a radiator bypass air passage is formed in which the outside air is directly introduced into the space S without passing through the radiator 41C.

[0058] In this configuration as well, the heat dissipation performance of the condenser 32 can be improved in the chiller-only operation mode.

[0059] [Fourth embodiment] The cooling device of the fourth embodiment is configured to form a condenser bypass air passage by operating the components of the condenser. A schematic side view is shown in FIG. 9. In FIG. 9, the configuration shown by the broken line shows the state before the condenser 32D is operated, and the configuration shown by the solid line shows the state after the condenser 32D is operated. As shown in FIG. 9, the condenser 32D has plate-like members 32a to 32g, which are configured in a zigzag shape in which V shapes are connected in a side view before the condenser 32D is operated. In this state, there is no gap that can become an air passage between the adjacent plate-like members 32a to 32g.

[0060] When forming the condenser bypass air passage, each of the plate-shaped members 32a-32g rotates around the end on the blower side as a fulcrum. By moving the plate-shaped members 32a-32g in this manner, the overall shape of the condenser 32D is deformed, and gaps are formed between the plate-shaped members at the end on the radiator side. In this manner, a condenser bypass air passage is formed in which the air in the space S is directly introduced into the space T without passing through the condenser 32D.

[0061] In this embodiment as well, the heat dissipation performance of the radiator 41 can be improved in the radiator-only operation mode.

[0062] The cooling device of the present invention may have, for example, both a mechanism for operating the radiator 41C in the third embodiment and a mechanism for operating the condenser 32D in the fourth embodiment.

[0063] Fig. 10 shows the relationship between the annual outdoor air temperature, the operation mode, and the air path. The cooling device in Fig. 10 is assumed to have the above-mentioned ventilation openings 5 ​​and 6. The cooling device also has temperature sensors that measure the outdoor air temperature, the temperature of the cooled liquid L, and the temperature of the antifreeze circulating in the outdoor air cooling system 4, and has a function to switch the operation mode according to the relationship between the respective measured temperatures, and also has a function to switch the outdoor air air path according to the operation mode.

[0064] As shown in FIG. 10, in the winter, the cooling device is in the (3) radiator-only operation mode, and outside air is introduced through the condenser bypass air duct. At this time, the vent 5 is in the "closed" state, and the vent 6 is in the "open" state. Then, when the operation mode is shifted to the (1) combined operation mode as the outside temperature rises, the vent 6 is closed and the outside air is introduced through the main air duct. Furthermore, when the operation mode is shifted to the (2) chiller-only operation mode in the summer, the vent 5 is opened and the outside air is introduced through the radiator bypass air duct. After that, as the temperature drops, the operation mode is shifted to the (1) combined operation mode and then to the (3) radiator-only operation mode, and the air duct for the outside air is also changed to the main air duct and then to the condenser bypass air duct. In this way, the air duct is automatically switched to the appropriate air duct depending on the operation mode, enabling efficient operation throughout the year.

[0065] The cooling device of the present invention is not limited to the configurations shown in Fig. 1 to Fig. 9. For example, the manner of the operating mechanism in the third and fourth embodiments may be changed. For example, in the third embodiment, the plate-like members 41a and 41b in the radiator 41C are each configured to rotate around the tip of the V-shape as a fulcrum, but they may be configured to rotate around the base of the V-shape as a fulcrum.

[0066] The cooling device may also have a sprinkling mechanism that sprinkles water on the radiator and / or the condenser. By sprinkling water on these, the cooling capacity can be further improved by utilizing the water temperature of the mist and the heat absorbed when evaporating. As the sprinkling mechanism, for example, a spray nozzle that sprays water toward the radiator or the condenser can be installed. In this case, the position and direction of the spray nozzle may be appropriately adjusted so that the radiator or the condenser can be efficiently cooled.

[0067] A plurality of cooling devices of the present invention can be combined and used as a cooling device unit. Fig. 11 shows a plan view of the cooling device unit from above. The cooling device unit 7 has two adjacent cooling devices 1E and 1F. The cooling devices 1E and 1F are arranged with the side panels attached to the width surfaces facing each other.

[0068] As shown in FIG. 11, the cooling device 1E has a ventilation opening 5E on one side panel and also has a ventilation opening 5E on the opposite side panel. Similarly, the cooling device 1F also has ventilation openings 5F, 5F on both side panels. Here, in the cooling device 1E, the ventilation openings 5E, 5E are provided at positions shifted from the center in the width direction of the cooling device 1E. In addition, the positions of the ventilation openings 5E, 5E in the width direction are not overlapped in the depth direction, but are arranged so as to be shifted from each other. The same is true for the cooling device 1F. By providing the ventilation openings 5E, 5F at such positions in the cooling devices 1E, 1F, when multiple cooling devices are installed in a connected manner, it is possible to suppress a decrease in the amount of air that can be taken in due to interference between the suction openings facing each other between adjacent cooling devices. EXAMPLES

[0069] The present invention will be described in more detail below with reference to examples, but is not limited to these examples in any way.

[0070] As an example, in order to confirm the effect of a radiator bypass air duct assuming the use of a ventilation opening, the condensation pressure, energy consumption coefficient (COP), etc. were evaluated using three cooling devices with different opening areas of the space S between the radiator and the condenser.

[0071] A schematic side view of each cooling device is shown in Fig. 12. The upper opening area of ​​each cooling device is 0.85 cm 2 (There were three circular openings with a diameter of 60 cm.)

[0072] As shown in Fig. 12, a cooling device in which the space S between the radiator and the condenser is completely blocked by a side panel is used in the reference example. In Example 1, a cooling device in which an opening (cross-hatched part) is opened in a part of the lower side panel is used. The opening area of ​​the opening is 0.18 m 2 In Example 2, a cooling device was used in which an opening (cross-hatched part) was provided by removing a part of the upper side panel. The opening area of ​​the opening was 1.37 m 2 The chiller cooling system was operated in summer (outdoor temperature approximately 37.0°C) under the following conditions so that the target chilled water outlet temperature was 20°C. Various evaluation parameters were measured during operation. The results are shown in Table 1, and a graph of the high pressure (condensation pressure) is shown in Figure 13.

[0073] [Test conditions] Operation mode: Chiller only operation mode Blower conditions: 2.2kW x 3 units, inverter frequency 50Hz, 21500m 3 / h Compressor conditions: 22kW x 1 unit, inverter frequency 300Hz Chilled water temperature conditions: flow rate 200L / min, target outlet temperature 20℃

[0074] [Table 1]

[0075] As shown in Table 1 and Figure 13, the larger the opening area of ​​space S, the lower the high pressure and the higher the coefficient of performance (COP). Therefore, in chiller-only operation mode, for example, by opening the vent that connects space S between the radiator and condenser to the outside, it is possible to effectively air-cool only the condenser, thereby improving the COP and other parameters of the chiller cooling system. [Explanation of symbols]

[0076] 1, 1A, 1B, 1C, 1D, 1E, 1F: Cooling device 11: Entrance 12: Outlet 13:Air supply port 14: Exhaust port 15: Side panel 16: Side panel 17: Storage area 18: Bulkhead 19: Side panel 2: Blower 21: Fan 22: Motor 3: Chiller cooling system 31: Compressor 32, 32D: Condenser 32a, 32b, 32c, 32d, 32e, 32f, 32g: plate-shaped members 33: Expansion valve 34: Evaporator 4: Fresh air cooling system 41, 41C: Radiator 41a, 41b: plate-shaped members 42: Tank 43: Pump 44:Heat exchanger 5, 5E, 5F: Ventilation opening 6: Ventilation opening 7: Cooling unit S: Space T: Space U: Space L: Cooled liquid

Claims

1. A cooling device comprising: a blower; an outside air cooling system having a radiator and using outside air introduced by the blower to cool a liquid to be cooled; and a chiller cooling system having a condenser and cooling the liquid to be cooled by a refrigeration cycle of a refrigerant, The cooling device is characterized in that it has a main air passage through which outside air introduced by the blower passes through the radiator and then the condenser before being exhausted, and also forms a bypass air passage through which the outside air introduced by the blower passes through either the radiator or the condenser and is exhausted without passing through the other.

2. 2. The cooling device according to claim 1, further comprising an opening for opening the ventilation hole, the opening being connected to a space between the radiator and the condenser, the bypass air passage being formed by opening the opening.

3. 3. The cooling device according to claim 2, wherein the ventilation opening is a ventilation opening that connects the space with the outside of the device, and when the ventilation opening is opened, outside air is directly introduced into the space, thereby forming a radiator bypass air path that does not pass through the radiator as the bypass air path.

4. The cooling device according to claim 2, characterized in that the cooling device has a radiator-only operation mode in which cooling is performed only by the outside air cooling system, and a chiller-only operation mode in which cooling is performed only by the chiller cooling system, and the opening and closing of the ventilation opening is controlled depending on these operation modes.

5. 2. The cooling device according to claim 1, wherein the bypass air passage is formed by operating one of the components of the radiator and the condenser to generate a gap in the radiator or the condenser.

6. The cooling device according to claim 5, characterized in that the cooling device has a radiator-only operation mode in which cooling is performed only by the outside air cooling system, and a chiller-only operation mode in which cooling is performed only by the chiller cooling system, and the operation of the components is controlled according to these operation modes.

7. 3. The cooling device according to claim 1, wherein the condenser and the radiator are disposed in different height regions that do not overlap each other.

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