Chiller

Abstract

The present disclosure relates to a chiller. The chiller according to an embodiment of the present disclosure comprises: a first compressor for compressing a first refrigerant; a first heat exchanger which is connected to the first compressor and through which the first refrigerant passes; a heat medium heat exchanger for exchanging heat between the first refrigerant and a predetermined heat medium; a first liquid pipe connecting the first heat exchanger and the heat medium heat exchanger; and a drain pan disposed under the first heat exchanger and including a drain hole for draining water generated in the first heat exchanger, wherein the first liquid pipe is disposed at one side of the drain pan to heat the drain pan or the water.

Description

chiller

[0001] The present disclosure relates to a chiller, and more specifically, to a chiller comprising a drain pan.

[0002] A chiller is a device widely used primarily in industrial and commercial HVAC systems that cools or heats desired spaces or equipment through a heat exchange process using a refrigerant. Such chillers contain a heat exchanger, which provides a cooling effect through the heat transfer between the air and the refrigerant.

[0003] However, conventional chillers had a problem where water, such as defrosting water generated in the heat exchanger, was not properly drained into the drain pan. This poor drainage caused water to accumulate in the drain pan, which could lead to freezing. Furthermore, it reduced the heat exchange surface area of ​​the heat exchanger, resulting in decreased heat exchange efficiency and potentially degrading the overall performance of the chiller.

[0004] To solve the aforementioned problem, a method of heating water by installing a heater in the drain pan has been attempted, but the method using a heater has the disadvantage of consuming additional energy and having low efficiency, and there are safety issues such as the risk of fire due to overheating of the heater or faulty installation.

[0005] The technical problem of the present disclosure is to provide a chiller capable of solving the various problems of the aforementioned prior art.

[0006] Another objective of the present disclosure is to provide a chiller capable of easily discharging water generated in a heat exchanger.

[0007] Another objective of the present disclosure is to provide a chiller capable of preventing the freezing of water generated in a heat exchanger.

[0008] Another objective of the present disclosure is to provide a chiller with improved heating and cooling efficiency.

[0009] Another objective of the present disclosure is to provide a chiller with improved system stability.

[0010] The problems of the present disclosure are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0011] To solve the above problem, a chiller according to an embodiment of the present disclosure comprises: a first compressor for compressing a first refrigerant; a first heat exchanger connected to the first compressor through which the first refrigerant passes; a heat medium heat exchanger for heat-exchanging the first refrigerant with a predetermined heat medium; a first liquid pipe connecting the first heat exchanger and the heat medium heat exchanger; and a drain pan disposed below the first heat exchanger and including a drain hole for draining water generated in the first heat exchanger, wherein the first liquid pipe is disposed on one side of the drain pan to heat the drain pan or the water.

[0012] The first liquid tube can be positioned above the drain hole.

[0013] The chiller further includes a heat exchanger holder disposed between the first heat exchanger and the drain pan and having a plurality of holes for draining water generated in the first heat exchanger, and the first liquid pipe may be disposed between the heat exchanger holder and the drain pan.

[0014] A chiller according to one embodiment of the present disclosure comprises: a first compressor for compressing a first refrigerant; a first heat exchanger connected to the first compressor through which the first refrigerant passes; a second compressor for compressing a second refrigerant; a second heat exchanger connected to the second compressor through which the second refrigerant passes; a heat exchanger support disposed below the first heat exchanger and the second heat exchanger and comprising a plurality of holes for draining water generated in the first heat exchanger or the second heat exchanger; and a drain pan disposed below the heat exchanger support and comprising a drain hole for draining water introduced from the hole, wherein the drain pan comprises a first inclined portion and a second inclined portion formed to be inclined downward toward the drain hole to guide water introduced from the hole to the drain hole, and the second inclined portion is located on the opposite side of the first inclined portion with respect to the drain hole.

[0015] The drain pan is formed so that the first inclined portion and the second inclined portion are connected, and the drain hole may be located at the center of the connection between the first inclined portion and the second inclined portion.

[0016] According to the chiller of the present disclosure, there is one or more of the following effects.

[0017] Water generated in the heat exchanger can be easily discharged through a drain pan structure inclined on both sides around the drain hole.

[0018] A liquid pipe is positioned on one side of the drain pan to prevent the water generated in the heat exchanger from freezing.

[0019] The refrigerant flowing through the liquid line is cooled below the saturation temperature in the drain pan, which can improve the efficiency of the chiller.

[0020] The refrigerant flowing through the liquid line cools the control box, which can improve the system stability of the chiller.

[0021] The effects of the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims.

[0022] FIG. 1 is a drawing showing a chiller by symbol according to one embodiment of the present disclosure.

[0023] FIG. 2 is a perspective view of a chiller according to one embodiment of the present disclosure.

[0024] FIG. 3 is a perspective view of a part of a chiller according to one embodiment of the present disclosure.

[0025] FIG. 4 is an exploded perspective view of a heat exchanger holder and a drain pan according to one embodiment of the present disclosure.

[0026] FIG. 5 is a side view of a part of a chiller according to one embodiment of the present disclosure.

[0027] FIG. 6 is a perspective view of a drain pan and a control box according to one embodiment of the present disclosure.

[0028] FIG. 7(a) shows the arrangement of a first liquid tube and a second liquid tube according to one embodiment of the present disclosure.

[0029] FIG. 7(b) shows the arrangement of a first liquid tube and a second liquid tube according to another embodiment of the present disclosure.

[0030] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are given the same reference number, and redundant descriptions thereof will be omitted.

[0031] The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification, and do not inherently possess distinct meanings or roles.

[0032] In addition, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art may obscure the essence of the embodiments disclosed in this specification, such detailed description is omitted. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that they include all modifications, equivalents, and substitutions that fall within the concept and technical scope of this disclosure.

[0033] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0034] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0035] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0036] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0037]

[0038] Referring to FIG. 1, the configuration of a chiller (1) according to one embodiment of the present disclosure can be seen.

[0039] The chiller (1) may include a first cycle (10) and a second cycle (40). The first cycle (10) and the second cycle (40) may be configured and operated independently. A first refrigerant may circulate in the first cycle (10), and a second refrigerant may circulate in the second cycle (40).

[0040] The first cycle (10) may be composed of a first compressor (11), a first oil separator (12), a first switching valve (13), a first heat exchanger (14), a first subcooler (15), a heat medium heat exchanger (7), a first accumulator (17), and a first receiver (18), etc.

[0041] The first compressor (11) compresses the first refrigerant. The first compressor (11) can discharge the first refrigerant in gaseous form after compressing it. A flow of the first refrigerant can be formed by the pressure difference created by the first compressor (11). The compressed first refrigerant may be in a high-temperature, high-pressure superheated vapor state.

[0042] The first oil separator (12) may be connected to the discharge port of the first compressor (11). The first oil separator (12) may be placed in the first discharge channel (21). The first compressor (11) may use oil to reduce friction occurring during the compression process of the first refrigerant. The oil may be discharged together with the compressed first refrigerant. The first oil separator (12) may separate and recover the oil discharged from the first compressor (11) from the first refrigerant.

[0043] The first switching valve (13) can switch the flow path of the first cycle (10). The first switching valve (13) can be connected to the first compressor (11) and the first discharge flow path (21). The first switching valve (13) can be a four-way valve.

[0044] The first switching valve (13) can send the refrigerant discharged from the first compressor (11) to the first heat exchanger (14) or the heat medium heat exchanger (7) to be described later. The case where the refrigerant discharged from the first compressor (11) is sent to the first heat exchanger (14) can be referred to as the cooling mode. The case where the refrigerant discharged from the first compressor (11) is sent to the heat medium heat exchanger (7) can be referred to as the heating mode.

[0045] The first heat exchanger (14) can exchange heat between the first refrigerant and air. The first heat exchanger (14) is connected to the first compressor (11) through which the first refrigerant passes. Depending on the flow direction of the first refrigerant discharged from the first compressor (11), the first heat exchanger (14) can function as a condenser or an evaporator.

[0046] The first heat exchanger (14) can be connected to the first switching valve (13) and the first-1 connecting path (23). The first heat exchanger (14) can be connected to the heat medium heat exchanger (7), which will be described later, and the first intermediate path (24).

[0047] The first-1 expansion valve (31) and the first-2 expansion valve (32) may be placed in the first intermediate passage (24). To minimize pressure loss of the first refrigerant flowing through the first intermediate passage (24), the first-1 expansion valve (31) and the first-2 expansion valve (32) may be adjusted so that one is fully open and the other expands the first refrigerant. The first-1 expansion valve (31) and the first-2 expansion valve (32) may be electric expansion valves.

[0048] For example, when the first heat exchanger (14) functions as a condenser, the first-1 expansion valve (31) is fully open, and the first-2 expansion valve (32) can be controlled to expand the first refrigerant. For example, when the first heat exchanger (14) functions as an evaporator, the first-1 expansion valve (31) can be controlled to expand the first refrigerant, and the first-2 expansion valve (32) can be fully open.

[0049] The first intermediate channel (24) may include a first-1 intermediate channel (24a), a first-2 intermediate channel (24b), and a first-3 intermediate channel (24c). The first-1 intermediate channel (24a), the first-2 intermediate channel (24b), and the first-3 intermediate channel (24c) may be separated by a first-1 expansion valve (31) and a first-2 expansion valve (32).

[0050] The first intermediate channel (24a) may refer to the part of the first intermediate channel (24) connecting the first heat exchanger (14) and the first-1 expansion valve (31). The first-2 intermediate channel (24b) may refer to the part of the first intermediate channel (24) connecting the first-1 expansion valve (31) and the first-2 expansion valve (32). The first-3 intermediate channel (24c) may refer to the part of the first intermediate channel (24) connecting the first-2 expansion valve (32) and the heat medium heat exchanger (7).

[0051] Meanwhile, the first-second intermediate channel (24b) can be referred to as the first liquid channel (24b). The first liquid channel (24b) connects the first heat exchanger (14) and the heat medium heat exchanger (7).

[0052] The first subcooler (15) can cool the first refrigerant. The first subcooler (15) can cool the first refrigerant to below the saturation temperature, thereby improving the efficiency of the chiller (1). The first subcooler (15) can be placed in the first-2 intermediate flow path (24b) and the first subcooling flow path (26).

[0053] The first subcooling channel (26) can connect the first-2 intermediate channel (24b) and the first compressor (11). The first subcooling channel (26) may include a first-1 subcooling channel (26a) connecting the first-2 intermediate channel (24b) and the first subcooler (15), and a first-2 subcooling channel (26b) connecting the first subcooler (15) and the first compressor (11).

[0054] The first-3 expansion valve (33) may be placed in the first-1 subcooling path (26a). The first-3 expansion valve (33) may expand a portion of the first refrigerant introduced from the first-2 intermediate path (24b) and send it to the first subcooler (15). The first subcooler (15) may exchange heat between the expanded low-temperature refrigerant and the remaining first refrigerant to cool the first refrigerant flowing through the first-2 intermediate path (24b) to below the saturation temperature.

[0055] The first liquid pipe (24b) may be positioned on one side of the drain pan (80). The first refrigerant flowing through the first liquid pipe (24b) may exchange heat with the drain pan (80).

[0056] The first liquid pipe (24b) may be positioned on one side of the control box (90). The first refrigerant flowing through the first liquid pipe (24b) may exchange heat with the control box (90).

[0057] The heat medium heat exchanger (7) exchanges heat with a predetermined heat medium with a first refrigerant or a second refrigerant. The first refrigerant may pass through the heat medium heat exchanger (7). The second refrigerant may pass through the heat medium heat exchanger (7). The first refrigerant and the second refrigerant may not exchange heat with each other in the heat medium heat exchanger (7).

[0058] Depending on the flow direction of the first refrigerant discharged from the first compressor (11), the heat transfer medium heat exchanger (7) can function as an evaporator or a condenser.

[0059] The heat transfer medium heat exchanger (7) may be a water refrigerant heat exchanger (7). The heat transfer medium may be water.

[0060] The heat transfer medium heat exchanger (7) can be connected to the first switching valve (13) and the first-second connecting path (25).

[0061] The first switching valve (13) and the first compressor (11) can be connected to the first inlet passage (22). The first accumulator (17) can be placed in the first inlet passage (22).

[0062] The first accumulator (17) can supply the first refrigerant in gaseous form to the first compressor (11). The first accumulator (17) can separate the gaseous refrigerant from the liquid refrigerant. The first accumulator (17) can prevent the first refrigerant in liquid form from flowing into the first compressor (11).

[0063] The first accumulator (17) can recover oil flowing with the first refrigerant. The first accumulator (17) and the first compressor (11) can be connected by a first oil passage (29). The oil recovered in the first accumulator (17) can be sent to the first compressor (11) through the first oil passage (29).

[0064] The first oil valve (36) can be placed in the first oil passage (29). The amount of oil sent to the first compressor (11) can be controlled by opening and closing the first oil valve (36).

[0065] The first receiver (18) can store the first refrigerant. The first receiver (18) can store the first liquid refrigerant flowing through the first liquid pipe (24b). The first receiver (18) can regulate the circulation amount of the first refrigerant according to the operating mode of the chiller (1), and the chiller (1) can maintain optimal system efficiency regardless of the operating mode.

[0066] The first receiver passage (27) can connect the first liquid pipe (24b) and the first receiver (18). The first receiver valve (34) can be placed in the first receiver passage (27). The amount of the first refrigerant flowing into the first receiver (18) can be controlled by opening and closing the first receiver valve (34).

[0067] The first-2 receiver passage (28) can connect the first receiver (18) and the first accumulator (17). The first-2 receiver valve (35) can be placed in the first-2 receiver passage (28). The amount of the first refrigerant flowing into the first accumulator (17) can be controlled by opening and closing the first-2 receiver valve (35).

[0068] Meanwhile, the second cycle (40) comprises the first compressor (11), first oil separator (12), first switching valve (13), first heat exchanger (14), first subcooler (15), first accumulator (17), first receiver (18), first discharge path (21), first inlet path (22), first-1 connecting path (23), first intermediate path (24), first liquid line (24b), first-2 connecting path (25), first subcooling path (26), first-1 receiver path (27), first-2 receiver path (28), first oil path (29), first-1 expansion valve (31), first-2 expansion valve (32), first-3 expansion valve (33), first-1 receiver valve (34), and first-2 A second compressor (41), a second oil separator (42), a second switching valve (43), a second heat exchanger (44), a second subcooler (45), a second accumulator (47), a second receiver (48), a second discharge passage (51), a second inlet passage (52), a second-1 connecting passage (53), a second intermediate passage (54), a second liquid pipe (54b), a second-2 connecting passage (55), a second subcooling passage (56), a second-1 receiver passage (57), a second-2 receiver passage (58), a second oil passage (59), a second-1 expansion valve (61), a second-2 expansion valve (62), a second-3 expansion valve (63), a second-1 receiver valve (64), and a second-2 It may include a receiver valve (65) and a second oil valve (66), and a detailed description thereof is omitted.

[0069]

[0070] Referring to FIG. 2, the external appearance of a chiller (1) according to one embodiment of the present disclosure can be seen.

[0071] The chiller (1) may include a frame (2). The frame (2) may be made of metal. The frame (2) may accommodate the components of the chiller (1) and form the exterior shape.

[0072] The fan (3) can form an air flow through the first heat exchanger (14) and the second heat exchanger (44). Meanwhile, although the second heat exchanger (44) is obscured in this drawing, the second heat exchanger (44) can be arranged in a V-shape symmetrically with respect to the first heat exchanger (14).

[0073] Heat exchange between the first refrigerant and air in the first heat exchanger (14) can be promoted by the fan (3). Heat exchange between the second refrigerant and air in the second heat exchanger (44) can be promoted by the fan (3).

[0074] A fan (3) can be placed above the first heat exchanger (14) and the second heat exchanger (44). Multiple fans (3) may be installed. The rotation axis of the fan (3) may be positioned to face upward and downward. The fan (3) can form an upward or downward airflow.

[0075] The first heat exchanger (14) and the second heat exchanger (44) can be placed on the heat exchanger stand (70) and the drain pan (80).

[0076] The side panel (4) may form part of the side of the chiller (1). The side panel (4) may be placed below the fan (3). The side panel (4) may be placed on both sides of the first heat exchanger (14) and the second heat exchanger (44). Since air cannot pass through the side panel (4), the airflow generated by the fan (3) may be guided to pass through the first heat exchanger (14) and the second heat exchanger (44).

[0077] The inlet pipe (8) and the outlet pipe (9) can be connected to a heat medium heat exchanger (7, see FIG. 1). A predetermined heat medium can be introduced into the heat medium heat exchanger (7) through the inlet pipe (8). A predetermined heat medium can be discharged out of the heat medium heat exchanger (7) through the outlet pipe (9).

[0078] The heat transfer medium introduced through the inlet pipe (8) exchanges heat with the first or second refrigerant passing through the heat transfer medium heat exchanger (7) and can be discharged through the discharge pipe (9). Through this, the chiller (1) can perform cooling or heating.

[0079] The control box (90) may be placed below the heat exchanger. The control box (90) may include a control unit. The power, mode, etc. of the chiller (1) can be controlled through the control box (90).

[0080]

[0081] Referring to FIG. 3, the combination of the heat exchanger (14, 44), the heat exchanger stand (70), and the drain pan (80) can be seen.

[0082] The first heat exchanger (14) and the second heat exchanger (44) can be arranged at an angle so that they become closer to each other as they go downward. This allows water generated in the first heat exchanger (14) or the second heat exchanger (44) to flow down along the slope.

[0083] The heat exchanger support (70) is connected below the first heat exchanger (14) and the second heat exchanger (44) to support the heat exchangers (14, 44). Water generated in the first heat exchanger (14) or the second heat exchanger (44) can be collected in the heat exchanger support (70).

[0084] The case in which water is generated in the first heat exchanger (14) or the second heat exchanger (44) is described. Referring to FIG. 1, the chiller (1) can operate in a heating mode. When in heating mode, the first refrigerant discharged from the first compressor (11) and the second refrigerant discharged from the second compressor (41) can be sent to the heat medium heat exchanger (7). The first refrigerant and the second refrigerant, which are condensed by heat exchange with the heat medium in the heat medium heat exchanger (7), can flow to the first heat exchanger (14) and the second heat exchanger (44), respectively, and evaporate.

[0085] Before evaporation, the temperatures of the first and second refrigerants may be lower than the ambient temperature. As a result, the first refrigerant may evaporate as it passes through the first heat exchanger (14), and the air may be cooled by exchanging heat with the first refrigerant. At this time, the air may be cooled to a temperature below the dew point, and water vapor in the air may condense on the surface of the first heat exchanger (14), causing water to form. In the same way, water may also form on the surface of the second heat exchanger (44).

[0086] The generated water can flow down along the first heat exchanger (14) or the second heat exchanger (44) to the area where the heat exchanger stand (70) and drain pan (80) are located.

[0087] Water condensed on the surface of the heat exchanger can freeze, forming frost, and water may also be generated during the defrosting process.

[0088] For example, the first refrigerant discharged from the first compressor (11) can be sent to the first heat exchanger (14), and the second refrigerant discharged from the second compressor (41) can be sent to the second heat exchanger (44). The first and second refrigerants have a temperature higher than frost, so defrosting can be performed. At this time, the frost on the surface of the first heat exchanger (14) and the second heat exchanger (44) melts, and water may be generated. The generated water may flow down along the surface of the first heat exchanger (14) and the second heat exchanger (44) to the area where the heat exchanger stand (70) and the drain pan (80) are located.

[0089] As mentioned above, the water generated in various ways in the heat exchanger is hereinafter referred to as defrosting water.

[0090]

[0091] Referring to FIG. 4, the structure of the heat exchanger holder (70) and the drain pan (80) can be seen.

[0092] The heat exchanger support (70) may be a single metal plate. The heat exchanger support (70) may include a central portion (71), a fixed portion (72), a horizontal portion (73), and a bent portion (74).

[0093] The central portion (71) can form the center of the heat exchanger support (70). The central portion (71) can be horizontal with respect to the ground when the heat exchanger support (70) supports the heat exchanger (14, 44). The heat exchanger support (70) can have a symmetrical shape with respect to the central portion (71).

[0094] A pipe hole (75) can be formed in the central part (71). Multiple pipe holes (75) can be formed spaced apart from each other along the longitudinal direction of the central part (71). Pipes constituting the chiller (1) can pass up and down through the pipe holes (75).

[0095] The fixed part (72) may be connected to the central part (71). The fixed part (72) may include a first fixed part (72a) and a second fixed part (72b). The fixed part (72) may be a part where the heat exchanger (14, 44) is fixed. For example, the bottom of the first heat exchanger (14) may be connected to the first fixed part (72a), and the bottom of the second heat exchanger (44) may be connected to the second fixed part (72b).

[0096] The fixed portion (72) can be formed to be inclined downward from the central portion (71). This makes it easier to connect the heat exchangers (14, 44) arranged in a V-shape. Additionally, the defrosting water flowing down along the heat exchangers (14, 44) can be guided along the inclined fixed portion (72) to the horizontal portion (73) to be described later.

[0097] The horizontal section (73) can be connected to the fixed section (72). The horizontal section (73) may include a first horizontal section (73a) and a second horizontal section (73b). The first horizontal section (73a) may be connected to the first fixed section (72a), and the second horizontal section (73b) may be connected to the second fixed section (72b). The horizontal section (73) can be horizontal to the ground when the heat exchanger support (70) supports the heat exchanger (14, 44).

[0098] The horizontal section (73) may include a plurality of holes (76). Through the plurality of holes (76), the defrosting water can be quickly drained. The plurality of holes (76) may be formed spaced apart from each other along the length direction of the horizontal section (73). The defrosting water is guided into the holes (76) and can be drained from the holes (76). The defrosting water that passes through the holes (76) can be collected in a drain pan (80) to be described later.

[0099] The bent portion (74) may be formed by extending from the horizontal portion (73). The bent portion (74) may include a first bent portion (74a) and a second bent portion (74b). The first bent portion (74a) may be connected to the first horizontal portion (73a), and the second bent portion (74b) may be connected to the second horizontal portion (73b). The bent portion (74) may be bent so as to face upward as it moves away from the horizontal portion (73). The bend portion (74) may prevent the water from overflowing.

[0100] A drain pan (80) can be placed below the heat exchanger stand (70). A drain pan (80) can be attached below the heat exchanger stand (70). The drain pan (80) can collect the water that passes through the hole (76) of the heat exchanger stand (70).

[0101] The drain pan (80) may include a drain hole (85) for draining the defrosting water introduced from the hole (76). The diameter of the drain hole (85) may be larger than the diameter of the hole (76) so that the defrosting water introduced from the hole (76) can be drained quickly.

[0102] The drain pan (80) may include a first inclined section (81) and a second inclined section (82). The first inclined section (81) and the second inclined section (82) may be formed to be inclined downward toward the drain hole (85). The first inclined section (81) and the second inclined section (82) may guide the defrosting water flowing in from the hole (76) to the drain hole (85). The first inclined section (81) and the second inclined section (82) may be shaped to receive the defrosting water passing through the hole (76) from below the hole (76) so that it does not flow out of the drain pan (80).

[0103] The second slope (82) may be located on the opposite side of the first slope (81) with respect to the drain hole (85). The drain pan (80) may form a bidirectional slope centered on the drain hole (85).

[0104] As a result, the distance the defrosting water flowing in from the hole (76) travels to the drain hole (85) is shortened, allowing it to be drained quickly. Additionally, since the defrosting water is drained quickly, it is possible to prevent the defrosting water from freezing when the ambient temperature is low, and to prevent a reduction in the heat exchange area of ​​the heat exchanger and a reduction in the efficiency of the chiller (1) due to accumulated freezing.

[0105] The first slope section (81) and the second slope section (82) can be formed to be connected. The drain hole (85) can be located at the center of the connection between the first slope section (81) and the second slope section (82). As a result, the travel distance of the defrosting water passing through the hole (76) can be shortened, and the defrosting water can be drained effectively.

[0106] The first slope section (81) and the second slope section (82) can be formed symmetrically. In this case, the average distance between the water passing through the hole (76) and the drain hole (85) is minimized, allowing for smooth drainage.

[0107] The drain pan (80) may be cut in a portion of its area, excluding the area corresponding to the hole (76), to form an opening (87). The opening (87) may be formed to communicate with the pipe hole (75).

[0108] The opening (87) may include a first opening (87a) and a second opening (87b). The first opening (87a) may be formed by cutting a portion of the first inclined portion (81). The second opening (87b) may be formed by cutting a portion of the second inclined portion (82).

[0109] The barrier wall (88) may protrude upward along the edge of the opening (87). By the barrier wall (88), the water collected in the drain pan (80) may be prevented from escaping through the opening (87).

[0110] The first side wall (83) may protrude from one side of the first slope (81) and the second slope (82). The first side wall (83) may connect the first slope (81) and the second slope (82). The second side wall (84) may protrude from the other side of the first slope (81) and the second slope (82). The second side wall (84) may connect the first slope (81) and the second slope (82). The second side wall (84) may face the first side wall (83).

[0111] The first side wall (83) and the second side wall (84) can guide the drain water flowing into the hole (76) to the drain hole (85). The first side wall (83) and the second side wall (84) can prevent the drain water collected in the drain pan (80) from overflowing out of the drain pan (80).

[0112] By means of the first inclined section (81), the second inclined section (82), the first side wall (83), and the second side wall (84), the drain pan (80) can form a space for receiving defrosting water. As a result, even if a large amount of defrosting water flows in from the hole (76), the drain pan (80) can receive the water without overflowing and can drain it quickly.

[0113] Meanwhile, the first liquid pipe (24b) or the second liquid pipe (54b), which will be described later, can be accommodated between the heat exchanger support (70) and the drain pan (80) by means of the space.

[0114]

[0115] Referring to FIG. 5, the configuration of the chiller (1) placed below the heat exchanger (14, 44) can be seen.

[0116] The drain pan (80) may include a drain boss (86). A drain hole (85) may be formed inside the drain boss (86). The drain boss (86) is connected to a drain pipe (not shown) to discharge the water to the outside of the chiller (1).

[0117] The control box (90) may be placed below the drain pan (80). The control box (90) may include a PCB (Printed Circuit Board, not shown). The PCB can control various components such as the compressor (11, 41), valve, and fan (3), and as a result, the amount of heat generated may be large. If the heat generated by the PCB is not sufficiently cooled, problems may occur in the control by the PCB, and the system stability of the chiller (1) may decrease.

[0118] The first liquid pipe (24b) and the second liquid pipe (54b) can be connected to a heat medium heat exchanger (7). The first liquid pipe (24b) and the second liquid pipe (54b) can be positioned to be in contact with the control box (90) to cool the control box (90). At this time, the control box (90) and the liquid pipes (24b, 54b) may be in direct contact, or indirectly in contact through other heat sinks (91, 92).

[0119] The PCB can be cooled as the first liquid pipe (24b) and the second liquid pipe (54b) cool the control box (90). The first refrigerant flowing through the first liquid pipe (24b) and the second refrigerant flowing through the second liquid pipe (54b) may be liquid refrigerants at a lower temperature than the PCB. As a result, when the first liquid pipe (24b) and the second liquid pipe (54b) are positioned to be in contact with the control box (90), the first refrigerant and the second refrigerant can absorb heat from the PCB. The PCB can be cooled by the first refrigerant and the second refrigerant, and as a result, the system stability of the chiller (1) can be improved.

[0120] The first liquid pipe (24b) can be in contact with the control box (90) and the first heat sink (91). The second liquid pipe (54b) can be in contact with the control box (90) and the second heat sink (92). Due to the first heat sink (91), the heat exchange area, heat exchange amount, and heat exchange efficiency between the first refrigerant flowing through the first liquid pipe (24b) and the control box (90) can be increased. Due to the second heat sink (92), the heat exchange area, heat exchange amount, and heat exchange efficiency between the second refrigerant flowing through the second liquid pipe (54b) and the control box (90) can be increased. Therefore, the stability of the chiller (1) system can be further improved.

[0121] The first liquid pipe (24b) and the second liquid pipe (54b) may be positioned on one side of the drain pan (80) to heat the drain water or the drain pan (80). In this drawing, the first liquid pipe (24b) and the second liquid pipe (54b) are positioned on the upper side of the drain pan (80), but they may be positioned at various other locations.

[0122] The temperature of the first refrigerant flowing through the first liquid pipe (24b) and the second refrigerant flowing through the second liquid pipe (54b) may be higher than the temperature of the drain pan (80) or the defrosting water, and may be higher than the freezing temperature of water. Therefore, the first refrigerant and the second refrigerant can exchange heat with the drain pan (80) or the defrosting water to prevent the defrosting water from freezing.

[0123] In addition, since the first refrigerant and the second refrigerant are cooled by the drain pan (80) and the defrosting water, the first refrigerant and the second refrigerant can be cooled below the saturation temperature even if the opening of the first-1 expansion valve (31, see FIG. 1) and the second-1 expansion valve (61, see FIG. 1) is controlled to be relatively large.

[0124] Therefore, the temperatures of the first refrigerant and the second refrigerant discharged from the first compressor (11) and the second compressor (41) can be stably controlled, and the stability and cooling efficiency of the chiller (1) system can be improved.

[0125] The first liquid pipe (24b) and the second liquid pipe (54b) extending from the heat transfer medium heat exchanger (7) can be arranged to pass through one side of the control box (90) and the drain pan (80). As a result, the first refrigerant and the second refrigerant can sequentially exchange heat with the control box (90) and the drain pan (80), and the first refrigerant flowing through the first liquid pipe (24b) and the second refrigerant flowing through the second liquid pipe (54b) can be efficiently utilized.

[0126] For example, in the heating mode, the first refrigerant and the second refrigerant flowing from the heat transfer medium heat exchanger (7) can exchange heat with the control box (90) and then exchange heat with the drain pan (80) or the defrosting water at the drain pan (80).

[0127] At this time, the first refrigerant and the second refrigerant can be heated by exchanging heat with the control box (90), and the temperature gradient with the drain pan (80) or the defrosting water can be increased, thereby increasing the amount of heat exchange. Therefore, the freezing of water in the drain pan (80) can be prevented more effectively.

[0128] For example, in cooling mode, the first refrigerant and the second refrigerant can exchange heat with the drain pan (80) or defrosting water in the drain pan (80), exchange heat with the control box (90), and then flow to the heat medium heat exchanger (7).

[0129] At this time, the first refrigerant and the second refrigerant can be cooled by exchanging heat with the drain pan (80) or defrosting water, and the amount of heat exchange can be increased as the temperature gradient with the control box (90) increases. Therefore, the control box (90) can be cooled more effectively, thereby improving system stability.

[0130]

[0131] Referring to FIG. 6, a first liquid pipe (24b) and a second liquid pipe (54b) can be seen placed on one side of the control box (90) and the drain pan (80).

[0132] The first liquid pipe (24b) and the second liquid pipe (54b) can be positioned above the drain hole (85). This prevents condensation of water around the drain hole (85) and allows for smooth drainage.

[0133] The first liquid pipe (24b) and the second liquid pipe (54b) are positioned above the drain hole (85) and can come into contact with the defrosting water guided into the drain hole (85). As the first liquid pipe (24b) and the second liquid pipe (54b) come into contact with the defrosting water, the heat exchange area, heat exchange amount, and heat exchange efficiency can be increased. Accordingly, freezing of the defrosting water can be effectively prevented, and the first refrigerant and the second refrigerant can be efficiently cooled to below the saturation temperature.

[0134] The barrier wall (88) surrounding the opening (87) can support the first liquid pipe (24b) and the second liquid pipe (54b). Thus, the first liquid pipe (24b) and the second liquid pipe (54b) can be arranged to exchange heat with the upper side of the drain hole (85) without blocking it.

[0135] A fastening hole (89) may be formed in the side walls (83, 84). The drain pan (80) may be connected to the heat exchanger mounting bracket (70) through the fastening hole (89). Multiple fastening holes (89) may be formed spaced apart from each other along the longitudinal direction of the first side wall (83). Multiple fastening holes (89) may be formed spaced apart from each other along the longitudinal direction of the second side wall (84). The fastening hole (89) formed in the first side wall (83) and the fastening hole (89) formed in the second side wall (84) may face each other.

[0136] Meanwhile, although not shown in the drawing, the first subcooler (15) and the second subcooler (45) may be placed below the drain pan (80). The first liquid pipe (24b) and the second liquid pipe (54b) may be connected to the first subcooler (15) and the second subcooler (45), respectively.

[0137] As a result, the first liquid pipe (24b) and the second liquid pipe (54b) extending from the heat medium heat exchanger (7) can be extended upward toward the control box (90) and the drain pan (80), and then extended downward again to be connected to the first subcooler (15) and the second subcooler (45).

[0138] The first liquid pipe (24b) and the second liquid pipe (54b) may be arranged to pass through the first opening (87a) or the second opening (87b). Due to the first opening (87a) and the second opening (87b), the travel path of the first liquid pipe (24b) and the second liquid pipe (54b) may be shortened.

[0139] For example, the first liquid pipe (24b) and the second liquid pipe (54b) extending from the control box (90) may pass through the second opening (87b) and be positioned on one side of the drain pan (80). As a result, the lengths of the first liquid pipe (24b) and the second liquid pipe (54b) may be shorter than in the case where they are not, and the pressure loss of the first refrigerant and the second refrigerant may be reduced, thereby increasing the efficiency of the chiller (1).

[0140] For example, the first liquid pipe (24b) and the second liquid pipe (54b) can pass through the first opening (87a) and be connected to the first subcooler (15) and the second subcooler (45) placed below the drain pan (80). As a result, the first liquid pipe (24b) and the second liquid pipe (54b) are positioned to heat the drain pan (80) or the defrosting water, while the copper wires are shortened, thereby reducing the pressure loss of the first and second refrigerants.

[0141] In addition, the material cost of the drain pan (80) can be reduced due to the first opening (87a) and the second opening (87b).

[0142]

[0143] Referring to FIG. 7, various arrangements of the first liquid pipe (24b) and the second liquid pipe (54b) can be observed. FIG. 7(a) shows the first liquid pipe (24b) and the second liquid pipe (54b) arranged between the drain pan (80) and the heat exchanger stand (70), and FIG. 7(b) shows the first liquid pipe (24b) and the second liquid pipe (54b) arranged below the drain pan (80).

[0144] The drain pan (80) can be connected to the underside of the heat exchanger holder (70) through the connection hole (89). The drain pan (80) can be connected to wrap around both sides of the heat exchanger holder (70). The drain pan (80) can be connected to wrap around the bent portion (74) of the heat exchanger holder (70).

[0145] The heat exchanger stand (70) and the drain pan (80) can be formed of a metal material. As a result, when the drain pan (80) is heated, heat is conducted so that the heat exchanger stand (70) can also be heated indirectly. When the heat exchanger stand (70) is heated, it is possible to prevent the defrosting water from freezing on the heat exchanger stand (70).

[0146] In addition, when the first refrigerant and the second refrigerant heat the drain pan (80), heat is also conducted to the defrosting water contained in the drain pan (80), thereby preventing the defrosting water from freezing.

[0147] Referring to FIG. 7(a), the arrangement of the first liquid tube (24b) and the second liquid tube (54b) according to one embodiment of the present disclosure can be seen.

[0148] The first liquid pipe (24b) and the second liquid pipe (54b) can be positioned between the heat exchanger support (70) and the drain pan (80). This reduces the heat loss of the first refrigerant and the second refrigerant flowing through the first liquid pipe (24b) and the second liquid pipe (54b).

[0149] For example, the first liquid pipe (24b) and the second liquid pipe (54b) are surrounded by a heat exchanger support (70) and a drain pan (80), so that the first refrigerant and the second refrigerant can exchange heat with the outside air and prevent the temperature from dropping. As a result, the drain pan (80) or the defrosting water can be heated efficiently.

[0150] Referring to FIG. 7(b), the arrangement of the first liquid tube (24b) and the second liquid tube (54b) according to another embodiment of the present disclosure can be seen.

[0151] The first liquid pipe (24b) and the second liquid pipe (54b) may be positioned on the lower side of the drain pan (80). The first liquid pipe (24b) and the second liquid pipe (54b) may be positioned on one side of the drain boss (86). The first refrigerant and the second refrigerant flowing through the first liquid pipe (24b) and the second liquid pipe (54b) can heat the drain pan (80) and indirectly heat the defrosting water.

[0152] The first liquid pipe (24b) and the second liquid pipe (54b) can be connected to a drain pan (80) and an anti-icing heat sink (5). By the anti-icing heat sink (5), the heat exchange area between the first refrigerant flowing through the first liquid pipe (24b) and the drain pan (80) can be increased, and the amount of heat exchange and the heat exchange efficiency can be increased. The heat exchange area between the second refrigerant flowing through the second liquid pipe (54b) and the drain pan (80) can be increased, and the amount of heat exchange and the heat exchange efficiency can be increased.

[0153] The first liquid pipe (24b) and the second liquid pipe (54b) are positioned at the lower side of the drain pan (80) to heat the drain pan (80) and prevent the defrosting water from freezing, while not obstructing the flow of the defrosting water into the drain hole (85). Therefore, the drainage of the defrosting water can occur smoothly.

[0154] The first liquid pipe (24b) and the second liquid pipe (54b) are positioned below the drain pan (80) so that they do not come into direct contact with the drain water. As a result, the first liquid pipe (24b) and the second liquid pipe (54b) can be prevented from being worn or corroded by interacting with the drain water.

[0155] Additionally, when the first liquid pipe (24b) and the second liquid pipe (54b) are positioned on the lower side of the drain pan (80), the travel distance of the first liquid pipe (24b) and the second liquid pipe (54b) can be shortened compared to when they are positioned on the upper side. As a result, the pressure loss of the first refrigerant and the second refrigerant can be reduced, thereby improving the efficiency of the chiller (1).

[0156] Although preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present disclosure.

Claims

1. A first compressor that compresses the first refrigerant; A first heat exchanger connected to the first compressor through which the first refrigerant passes; A heat exchanger for heat-exchanging a predetermined heat medium with the above-mentioned first refrigerant; A first liquid pipe connecting the first heat exchanger and the heat transfer medium heat exchanger; and It includes a drain pan disposed below the first heat exchanger and having a drain hole for draining water generated in the first heat exchanger, and The first liquid tube is a chiller positioned on one side of the drain pan to heat the drain pan or the water.

2. In Paragraph 1, The first liquid tube is a chiller positioned above the drain hole.

3. In Paragraph 2, The above chiller is, The heat exchanger mounting bracket further includes a plurality of holes disposed between the first heat exchanger and the drain pan for draining water generated in the first heat exchanger, and The above first liquid tube is, A chiller positioned between the heat exchanger support and the drain pan.

4. In Paragraph 1, The first liquid tube above is a chiller positioned below the drain pan.

5. In Paragraph 4, The first liquid pipe above is a chiller connected to the drain pan and the anti-icing heatsink.

6. In Paragraph 1, The above chiller is, It includes a control box that controls the first compressor, and The first liquid tube above is a chiller arranged to be in contact with the control box to cool the control box.

7. In Paragraph 6, The above first liquid tube is, A chiller in contact with the above control box and the first heat sink.

8. In Paragraph 6, The first liquid pipe extending from the above heat transfer medium heat exchanger is A chiller positioned to pass through one side of the above control box and the above drain pan.

9. A first compressor for compressing the first refrigerant; A first heat exchanger connected to the first compressor through which the first refrigerant passes; A second compressor that compresses the second refrigerant; A second heat exchanger connected to the second compressor through which the second refrigerant passes; A heat exchanger holder disposed below the first heat exchanger and the second heat exchanger and comprising a plurality of holes for draining water generated in the first heat exchanger or the second heat exchanger; and It includes a drain pan positioned below the heat exchanger mounting bracket and comprising a drain hole for draining water introduced from the hole, The above drain pan is, It includes a first inclined section and a second inclined section formed to slope downward toward the drain hole to guide water flowing in from the above hole to the drain hole, The second inclined portion is a chiller located on the opposite side of the first inclined portion with respect to the drain hole.

10. In Paragraph 9, The above drain pan is, The first inclined portion and the second inclined portion are formed to be connected, and The above drain hole is a chiller located at the center of the connection between the first inclined section and the second inclined section.

11. In Paragraph 9, The above chiller is: A heat exchanger that exchanges heat between the first refrigerant and the second refrigerant with a predetermined heat exchanger; A first liquid pipe connecting the first heat exchanger and the heat transfer medium heat exchanger; and It further includes a second liquid pipe connecting the second heat exchanger and the heat transfer medium heat exchanger, and The first liquid pipe and the second liquid pipe are a chiller disposed on one side of the drain pan to heat the drain pan or the water.

12. In Paragraph 11, The first liquid tube and the second liquid tube above are A chiller positioned between the heat exchanger support and the drain pan.

13. In Paragraph 12, The above chiller is, It includes a first subcooler and a second subcooler disposed below the drain pan, and The above drain pan is, A portion of the area excluding the area corresponding to the above hole is cut to form an opening, and The first liquid pipe passes through the opening and is connected to the first supercooler, and A chiller in which the second liquid pipe passes through the opening and is connected to the second supercooler.

14. In Paragraph 13, The above drain pan is, A chiller comprising a barrier wall protruding upward along the edge of the opening.

15. In Paragraph 9, The above drain pan is, A first side wall protruding from one side of the first inclined portion and the second inclined portion, and A chiller comprising a first inclined portion and a second inclined portion, protruding from the other side of the second inclined portion and facing the first side wall.

Images