Chiller

Abstract

The present disclosure relates to a chiller. The chiller of the present disclosure comprises: a compressor which compresses a refrigerant; a first heat exchanger which exchanges heat between the refrigerant discharged from the compressor and air; a third heat exchanger which exchanges heat between the refrigerant discharged from the compressor and water; a liquid pipe which connects the first heat exchanger and the third heat exchanger; a subcooler which forms a first path and a second path therein; a branch pipe which allows a portion of the refrigerant flowing through the liquid pipe to flow; a subcooler expansion valve which expands the refrigerant flowing through the branch pipe; and a connection pipe which supplies, to the subcooler, the refrigerant flowing through the subcooler expansion valve.

Description

chiller

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

[0002] A chiller is a device that uses cooling water to cool air or equipment in buildings, factories, data centers, etc., and can be used primarily when large-scale cooling is required.

[0003] Chillers can cool water or air to cool building air conditioning systems or manufacturing equipment, or to maintain a constant temperature. Additionally, they can reduce power consumption by efficiently managing cooling in large-scale facilities.

[0004] There are various types of chillers, such as absorption chillers, air-cooled chillers, and water-cooled chillers. Additionally, chillers can have a structure that controls the water temperature by using a compressor to compress and evaporate a refrigerant.

[0005] However, chillers using compressors generally have a structure that makes it difficult to perform cooling and heating operations simultaneously in a single cycle.

[0006] Domestic registered patent KR 10-1542120 B1 discloses a chiller using a compressor.

[0007] A subcooler can be used to improve the heat exchange performance of the refrigerant flowing through the compressor. However, in the case of a chiller, the flow direction of the refrigerant changes during the process of supplying cooled water or heated water to a heat demand point, and this change in flow direction may cause a problem in which the relative flow direction of the refrigerant flowing inside the subcooler changes, thereby reducing the performance of the evaporator.

[0008] The present disclosure aims to solve the aforementioned problems and other problems.

[0009] Another objective is to provide a chiller that improves the performance of the heat exchanger.

[0010] Another objective is to provide a chiller that changes the flow direction of the refrigerant flowing through the subcooler according to the operating mode. That is, to provide a chiller in which the refrigerant flowing inside the subcooler forms a counterflow in opposite directions regardless of the operating mode.

[0011] To achieve the above objective, a chiller according to an embodiment of the present disclosure comprises: a compressor for compressing a refrigerant; a first heat exchanger for heat-exchanging air with the refrigerant discharged from the compressor; a third heat exchanger for heat-exchanging water with the refrigerant discharged from the compressor; a liquid pipe connecting the first heat exchanger and the third heat exchanger; a subcooler forming a first pass and a second pass inside; a branch pipe for flowing a portion of the refrigerant flowing through the liquid pipe; a subcooler expansion valve for expanding the refrigerant flowing through the branch pipe; and a connecting pipe for supplying the refrigerant flowing through the subcooler expansion valve to the subcooler.

[0012] The first pass above allows refrigerant introduced from the liquid pipe to flow, and the second pass allows refrigerant introduced from the connecting pipe to flow. The direction of the refrigerant flowing in the first pass and the direction of the refrigerant flowing in the second pass are formed opposite to each other.

[0013] The above connecting pipe includes a first connecting pipe connected to the supercooler in one direction and a second connecting pipe connected to the supercooler in the opposite direction of the first connecting pipe.

[0014] The first connecting pipe and the second connecting pipe are connected to each of the two ends of the second pass.

[0015] Depending on the flow direction of the refrigerant flowing through the above liquid pipe, the direction of the refrigerant flowing through the first connecting pipe and the second connecting pipe changes.

[0016] It includes an inlet pipe through which a first refrigerant flows into the supercooler, and an outlet pipe through which the first refrigerant flows out from the supercooler. The inlet pipe is optionally connected to either the first connecting pipe or the second connecting pipe.

[0017] The above-mentioned supercooler expansion valve is placed in the above-mentioned inlet pipe.

[0018] The length of the inlet pipe is formed to be longer than the length of the first connecting pipe or the length of the second connecting pipe.

[0019] It includes a supercooler switching valve that selectively connects the inlet pipe, the outlet pipe, the first connecting pipe, and the second connecting pipe.

[0020] The above-mentioned supercooler switching valve connects the inlet pipe to one of the first connecting pipe and the second connecting pipe, and connects the outlet pipe to the other of the first connecting pipe and the second connecting pipe.

[0021] It includes an inlet pipe into which a first refrigerant flows into the above-mentioned supercooler and in which a supercooler expansion valve is arranged.

[0022] The branch pipe includes a first branch pipe branching from the liquid pipe and a second branch pipe branching from the liquid pipe on the opposite side of the first branch pipe relative to the liquid pipe. Each of the first branch pipe and the second branch pipe is connected to the inlet pipe.

[0023] Among the first branch pipe and the second branch pipe, the refrigerant is supplied to the supercooler through the branch pipe positioned downstream of the supercooler according to the flow direction of the liquid pipe.

[0024] It includes a three-way valve that connects one of the first branch pipe and the second branch pipe to the inlet pipe.

[0025] The above three-way valve is positioned in the opposite direction of the connecting pipe relative to the above liquid pipe.

[0026] The diameter of the above connecting pipe is formed to be smaller than the diameter of the above liquid pipe.

[0027] Specific details of other embodiments are included in the detailed description and drawings.

[0028] According to the chiller of the present disclosure, there is one or more of the following effects.

[0029] First, there is an advantage in that the flow direction of the refrigerant branched from the liquid line and flowing into the subcooler can be controlled to form a counterflow inside the subcooler. In other words, the performance of the subcooler can be maintained regardless of the chiller's operating mode.

[0030] Second, the flow rate of the refrigerant flowing into the subcooler can be controlled by reducing the diameter of the branch pipe branching from the liquid pipe. In addition, the amount of branched refrigerant entering the subcooler can be controlled through the subcooler expansion valve. Control valves are positioned before and after the refrigerant pipe where the subcooler expansion valve is located, thereby controlling the flow direction of the refrigerant flowing into the subcooler.

[0031] 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.

[0032] FIG. 1 is a configuration diagram of a chiller system according to one embodiment of the present disclosure.

[0033] FIG. 2 is a drawing for explaining a configuration related to a supercooler according to one embodiment of the present disclosure.

[0034] Figure 3 is a diagram for explaining the flow of refrigerant in cooling mode based on the diagram of Figure 2.

[0035] Figure 4 is a diagram illustrating the flow of the refrigerant in the heating mode based on the diagram of Figure 2.

[0036] FIG. 5 is a perspective view of a configuration related to a supercooler according to one embodiment of the present disclosure.

[0037] The advantages and features of the present disclosure and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments below but may be implemented in various different forms. The embodiments provided are merely to make the present disclosure complete and to fully inform those skilled in the art of the scope of the disclosure. The present disclosure is defined only by the scope of the claims. Throughout the specification, like reference numerals refer to like components.

[0038] Hereinafter, the present disclosure will be described with reference to the drawings for explaining a chiller according to embodiments of the present disclosure.

[0039] With reference to FIG. 1, the configuration of the chiller of the present invention will be explained.

[0040] The chiller includes a first compressor (102) that compresses a first refrigerant. The chiller includes a first heat exchanger (104) that exchanges heat between the first refrigerant discharged from the first compressor (102) and air.

[0041] The chiller includes a second compressor (202) that compresses a second refrigerant. The chiller includes a second heat exchanger (204) that exchanges heat between the second refrigerant discharged from the second compressor (202) and air.

[0042] The chiller includes a fan (300) that forms an airflow to a first heat exchanger (104) and a second heat exchanger (204). The chiller can form an airflow to each of the first heat exchanger (104) and the second heat exchanger (204) using a single fan (300).

[0043] The first refrigerant and the second refrigerant may be of the same type or different types. However, the first refrigerant and the second refrigerant flow so as not to mix with each other. The first refrigerant is circulated by the first compressor (102), and the second refrigerant is circulated by the second compressor (202).

[0044] The chiller includes a third heat exchanger (302) that exchanges heat with water and a first or second refrigerant. The third heat exchanger (302) may operate complementarily with the first heat exchanger (104) or the second heat exchanger (204). Here, complementary operation may mean opposite to use as a condenser or as an evaporator.

[0045] For example, when the third heat exchanger (302) is used as a condenser, the first heat exchanger (104) or the second heat exchanger (204) can be used as an evaporator. Also, when the third heat exchanger (302) is used as an evaporator, the first heat exchanger (104) or the second heat exchanger (204) can be used as a condenser.

[0046] The third heat exchanger (302) can supply water that has been heat-exchanged with the first refrigerant and the second refrigerant to a water supply pipe (not shown). The third heat exchanger (302) may be a plate heat exchanger that heat-exchanges water and refrigerant.

[0047] The chiller includes a first switching valve (106) that selectively sends a first refrigerant discharged from a first compressor (102) to a first heat exchanger (104) or a third heat exchanger (302).

[0048] The first switching valve (106) can send the first refrigerant discharged from the first compressor (102) to the first heat exchanger (104) and send the first refrigerant flowing from the third heat exchanger (302) to the first compressor (102). Additionally, the first switching valve (106) can send the first refrigerant discharged from the first compressor (102) to the third heat exchanger (302) and send the first refrigerant flowing from the first heat exchanger (104) to the first compressor (102).

[0049] The chiller includes a second switching valve (206) that selectively sends the second refrigerant discharged from the second compressor (202) to the second heat exchanger (204) or the third heat exchanger (302).

[0050] The second switching valve (206) can send the second refrigerant discharged from the second compressor (202) to the second heat exchanger (204) and send the second refrigerant flowing from the third heat exchanger (302) to the second compressor (202). Additionally, the second switching valve (206) can send the second refrigerant discharged from the second compressor (202) to the third heat exchanger (302) and send the second refrigerant flowing from the second heat exchanger (204) to the second compressor (202).

[0051] The chiller includes a first accumulator (110) that separates the first refrigerant flowing to the first compressor (102) and sends the first refrigerant in gaseous form to the first compressor (102). The chiller includes a first receiver (112) that stores a portion of the first refrigerant flowing through the first compressor (102).

[0052] The chiller includes a second accumulator (210) that separates the second refrigerant flowing to the second compressor (202) and sends the gaseous second refrigerant to the second compressor (202). The chiller includes a second receiver (212) that stores a portion of the second refrigerant flowing through the second compressor (202).

[0053] The chiller includes a first expansion valve (114) that expands a first refrigerant flowing in a first liquid pipe (130) and a second expansion valve (214) that expands a second refrigerant flowing in a second liquid pipe (230).

[0054] The first expansion valve (114) includes a first-1 expansion valve (116) positioned adjacent to the first heat exchanger (104) and a first-2 expansion valve (118) positioned adjacent to the third heat exchanger (302).

[0055] The second expansion valve (214) includes a second-1 expansion valve (216) positioned adjacent to the second heat exchanger (204) and a second-2 expansion valve (218) positioned adjacent to the third heat exchanger (302).

[0056] The chiller includes a first liquid pipe (130) connecting a first heat exchanger (104) and a third heat exchanger (302), and a first supercooler (108) disposed in the first liquid pipe (130).

[0057] A liquid first refrigerant may flow through the first liquid pipe (130). The first supercooler (108) may expand a portion of the first refrigerant flowing through the first liquid pipe (130) and exchange heat with the refrigerant flowing through the first liquid pipe (130). A portion of the first refrigerant that is branched out from the first liquid pipe (130), expanded, and heat-exchanged may flow to the first compressor (102).

[0058] The chiller includes a second liquid pipe (230) connecting a second heat exchanger (204) and a third heat exchanger (302), and a second supercooler (208) disposed in the second liquid pipe (230).

[0059] A second liquid refrigerant may flow through the second liquid pipe (230). The second subcooler (208) may expand a portion of the second refrigerant flowing through the second liquid pipe (230) and exchange heat with the refrigerant flowing through the second liquid pipe (230). A portion of the second refrigerant that is branched out from the second liquid pipe (230), expanded, and heat-exchanged may flow to the second compressor (202).

[0060] With reference to FIG. 2, the first and second supercoolers of the present invention will be described in detail.

[0061] The first supercooler (108) and its surrounding configuration are described below. The configuration of the first supercooler (108) described below can be applied in the same way to the second supercooler (208).

[0062] The first supercooler (108) is placed in the first liquid pipe (130).

[0063] In the first supercooler (108), a first pass (108a) through which a first refrigerant flowing through the first liquid pipe (130) flows, and a second pass (108b) through which a portion of the first refrigerant branched from the first liquid pipe (130) flows are formed. The flow direction of the first refrigerant flowing through the first pass (108a) is formed in a direction opposite to the flow direction of the first refrigerant flowing through the second pass (108b).

[0064] The first supercooler (108) exchanges heat between a portion of the first refrigerant flowing through the first liquid pipe (130) and the refrigerant flowing through the first liquid pipe (130).

[0065] The chiller includes a first branch pipe (132) branched from the first liquid pipe (130). The chiller includes a second branch pipe (134) branched from the first liquid pipe (130). The first branch pipe (132) is positioned on the opposite side of the second branch pipe (134) with respect to the supercooler.

[0066] That is, the first branch pipe (132) can be branched from the first liquid pipe (130) between the first supercooler (108) and the third heat exchanger (302). The second branch pipe (134) can be branched from the first liquid pipe (130) between the first supercooler (108) and the first heat exchanger (104).

[0067] The chiller includes a first connecting pipe (140) connected to a first supercooler (108) in one direction, and a second connecting pipe (142) connected to the first supercooler (108) in the opposite direction to the first connecting pipe (140). The first connecting pipe (140) and the second connecting pipe (142) are connected in opposite directions with the first supercooler (108) in between.

[0068] When the first refrigerant flows into the first supercooler (108) through the first connecting pipe (140), the first refrigerant is discharged through the second connecting pipe (142). Additionally, when the first refrigerant flows into the first supercooler (108) through the second connecting pipe (142), the first refrigerant is discharged through the first connecting pipe (140).

[0069] The chiller includes an inlet pipe (136) through which a first refrigerant flows into a first supercooler (108), and an outlet pipe (138) through which the first refrigerant flows out from the first supercooler (108).

[0070] The inlet pipe (136) is connected to the first branch pipe (132) and the second branch pipe (134) at one end. The inlet pipe (136) is connected to the first connecting pipe (140) and the second connecting pipe (142) at the other end. Additionally, the inlet pipe (136) is connected to the outlet pipe (138) at the other end.

[0071] The inlet pipe (136) is connected to one of the first branch pipe (132) and the second branch pipe (134). Additionally, the inlet pipe (136) is connected to one of the first connecting pipe (140) and the second connecting pipe (142). The outlet pipe (138) is connected to the other of the first connecting pipe (140) and the second connecting pipe (142).

[0072] A subcooler expansion valve (146) is disposed in the inlet pipe (136). The subcooler expansion valve (146) expands the first refrigerant flowing into the first subcooler (108) through the inlet pipe (136). Accordingly, the first subcooler (108) expands the first refrigerant expanded through the inlet pipe (136) and the first refrigerant flowing through the first liquid pipe (130).

[0073] The chiller includes a three-way valve (144) that connects one of the first branch pipe (132) and the second branch pipe (134) to the inlet pipe (136). The three-way valve (144) selectively connects the first branch pipe (132) and the second branch pipe (134) to the inlet pipe (136). The first refrigerant can flow through the refrigerant pipe connected to the inlet pipe (136) among the first branch pipe (132) and the second branch pipe (134).

[0074] The chiller includes a supercooler switching valve (148) that selectively connects an inlet pipe (136), an outlet pipe (138), a first connecting pipe (140), and a second connecting pipe (142).

[0075] The supercooler switching valve (148) connects the inlet pipe (136) to one of the first connecting pipe (140) and the second connecting pipe (142), and connects the outlet pipe (138) to the other of the first connecting pipe (140) and the second connecting pipe (142).

[0076] Hereinafter, the flow of the first refrigerant according to the operating mode of the chiller is explained with reference to FIGS. 3 and FIGS. 4.

[0077] The first pass (108a) and the second pass (108b) formed inside the first supercooler (108) form the flow of the first refrigerant in opposite directions. That is, regardless of the operating mode, the flow direction of the first refrigerant flowing through the first pass (108a) and the flow direction of the first refrigerant flowing through the second pass (108b) are formed in opposite directions to each other.

[0078] That is, each of the first refrigerants flowing inside the first supercooler (108) forms a counterflow.

[0079] Branch pipes (132, 134) are respectively arranged on both sides based on the first supercooler (108). The first refrigerant flows into the branch pipe arranged downstream of the first supercooler (108) based on the flow direction of the first refrigerant flowing through the first liquid pipe (130).

[0080] Referring to Fig. 3, the flow of the first refrigerant in the cooling mode is explained.

[0081] The flow of the first refrigerant described in Fig. 3 can also be applied to the flow of the second refrigerant flowing through the second supercooler.

[0082] The cooling mode is an operating method in which the third heat exchanger (302) is used as an evaporator. In the cooling mode, the first heat exchanger (104) and the second heat exchanger (204) are used as condensers.

[0083] The three-way valve (144) connects the first branch pipe (132) and the inlet pipe (136). The supercooler switching valve (148) connects the inlet pipe (136) and the first connecting pipe (140), and connects the outlet pipe (138) and the second connecting pipe (142).

[0084] In cooling mode, the first refrigerant flowing through the first liquid pipe (130) flows from the first heat exchanger (104) to the third heat exchanger (302).

[0085] In the first pass (108a) of the first supercooler (108), the first refrigerant flows in the first direction. In the second pass (108b) of the first supercooler (108), the first refrigerant flows in the second direction opposite to the first direction.

[0086] A portion of the first refrigerant flowing through the first liquid pipe (130) flows into the first branch pipe (132). The first refrigerant flowing through the first branch pipe (132) into the inlet pipe (136) is expanded through the supercooler expansion valve (146).

[0087] The first refrigerant flowing from the inlet pipe (136) flows to the first supercooler (108) through the first connecting pipe (140). The first refrigerant discharged from the first supercooler (108) flows to the outlet pipe (138) through the second connecting pipe (142).

[0088] Referring to Fig. 4, the flow of the first refrigerant in the heating mode is explained.

[0089] The flow of the first refrigerant described in Fig. 4 can also be applied to the flow of the second refrigerant flowing through the second supercooler.

[0090] The heating mode is an operating method in which the third heat exchanger (302) is used as a condenser. In the heating mode, the first heat exchanger (104) and the second heat exchanger (204) are used as evaporators.

[0091] The three-way valve (144) connects the second branch pipe (134) and the inlet pipe (136). The supercooler switching valve (148) connects the inlet pipe (136) and the second connecting pipe (142), and connects the outlet pipe (138) and the first connecting pipe (140).

[0092] In heating mode, the first refrigerant flowing through the first liquid pipe (130) flows from the third heat exchanger (302) to the first heat exchanger (104).

[0093] In the first pass (108a) of the first supercooler (108), the first refrigerant flows in the second direction. In the second pass (108b) of the first supercooler (108), the first refrigerant flows in the first direction opposite to the second direction.

[0094] A portion of the first refrigerant flowing through the first liquid pipe (130) flows into the second branch pipe (134). The first refrigerant flowing into the inlet pipe (136) through the second branch pipe (134) is expanded through the supercooler expansion valve (146).

[0095] The first refrigerant flowing from the inlet pipe (136) flows to the first supercooler (108) through the second connecting pipe (142). The first refrigerant discharged from the first supercooler (108) flows to the outlet pipe (138) through the first connecting pipe (140).

[0096] Referring to FIG. 5, the form and arrangement of the first supercooler and its related components will be explained.

[0097] The first supercooler (108) may use a plate heat exchanger that heat-exchanges the first refrigerant with each other.

[0098] The first supercooler (108) includes a supercooler body (109a) that forms a first pass and a second pass inside. The first supercooler (108) includes a first liquid pipe port (109b) connected to a first liquid pipe (130), and a second liquid pipe port (109c) spaced apart from the first liquid pipe port (109b) and connected to the first liquid pipe (130).

[0099] A first branch pipe (132) is positioned on one side of the first liquid pipe port (109b). A second branch pipe (134) is positioned on one side of the second liquid pipe port (109e).

[0100] The first supercooler (108) includes a first connection port (109d) connected to the first connection pipe (140) and a second connection port (109e) connected to the second connection pipe (142).

[0101] The first liquid pipe port (109b) is positioned above the second liquid pipe port (109c). The first connection port (109d) is positioned below the second connection port (109e).

[0102] The diameter of the first liquid pipe (130) is formed to be larger than the diameter of the first branch pipe (132) or the second branch pipe (134). The diameter (130D) of the first liquid pipe (130) is formed to be larger than the diameter (140D) of the first connecting pipe (140) or the second connecting pipe (142).

[0103] The three-way valve (144) is positioned between the first liquid pipe port (109b) and the second liquid pipe port (109c), which are arranged in an up-and-down direction. The inlet pipe (136) extending from the three-way valve (144) has a shape that is bent downwards.

[0104] The three-way valve (144) is positioned in the opposite direction of the first connecting pipe (140) and the second connecting pipe (142) with respect to the first liquid pipe port (109b) and the second liquid pipe port (109c). The three-way valve (144) is positioned in the opposite direction of the first connecting pipe (140) and the second connecting pipe (142) with respect to the first liquid pipe (130).

[0105] The three-way valve (144) is positioned opposite the supercooler switching valve (148) with respect to the first liquid pipe port (109b) and the second liquid pipe port (109c). The three-way valve (144) is positioned opposite the supercooler switching valve (148) with respect to the first liquid pipe (130).

[0106] The length of the inlet pipe (136) is formed to be longer than the length of the first branch pipe (132) or the length of the second branch pipe (134). The length of the inlet pipe (136) is formed to be longer than the length of the first connecting pipe (140) or the length of the second connecting pipe (142).

[0107] 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 compressor that compresses refrigerant; A first heat exchanger that exchanges heat between the refrigerant discharged from the above compressor and the air; A third heat exchanger that exchanges heat between the refrigerant discharged from the above compressor and water; A liquid pipe connecting the first heat exchanger and the third heat exchanger; A supercooler forming a first pass and a second pass inside; A branch pipe that allows a portion of the refrigerant flowing through the above liquid pipe to flow; A subcooler expansion valve that expands the refrigerant flowing through the branch pipe; and It includes a connecting pipe that supplies the refrigerant flowing through the above-mentioned subcooler expansion valve to the above-mentioned subcooler, and The first pass above allows refrigerant introduced from the liquid pipe to flow, and the second pass allows refrigerant introduced from the connecting pipe to flow. A chiller in which the direction of the refrigerant flowing in the first pass and the direction of the refrigerant flowing in the second pass are formed opposite to each other.

2. In Paragraph 1, The above connecting pipe comprises a first connecting pipe connected to the supercooler in one direction and a second connecting pipe connected to the supercooler in the opposite direction of the first connecting pipe.

3. In Paragraph 2, The first connecting pipe and the second connecting pipe are connected to each of the two ends of the second pass, and A chiller in which the direction of the refrigerant flowing through the first connecting pipe and the second connecting pipe changes according to the direction of flow of the refrigerant flowing through the liquid pipe.

4. In Paragraph 2, It includes an inlet pipe through which refrigerant flows into the above-mentioned supercooler and an outlet pipe through which refrigerant flows out from the above-mentioned supercooler, The above inlet pipe is a chiller that is selectively connected to either the first connecting pipe or the second connecting pipe.

5. In Paragraph 4, A chiller in which the supercooler expansion valve is disposed in the inlet pipe.

6. In Paragraph 5, A chiller in which the length of the inlet pipe is formed to be longer than the length of the first connecting pipe or the length of the second connecting pipe.

7. In Paragraph 4, A chiller comprising a subcooler switching valve that selectively connects the inlet pipe, the outlet pipe, the first connecting pipe, and the second connecting pipe.

8. In Paragraph 7, The above-mentioned supercooler switching valve connects the inlet pipe to one of the first connecting pipe and the second connecting pipe, and connects the outlet pipe to the other of the first connecting pipe and the second connecting pipe, for a chiller.

9. In Paragraph 1, It includes an inlet pipe into which a refrigerant flows into the above-mentioned subcooler and in which the above-mentioned subcooler expansion valve is disposed, The above branch pipe is, A first branch pipe branching from the above liquid pipe, and It includes a second branch pipe branching from the liquid pipe on the opposite side of the first branch pipe based on the liquid pipe, and Each of the above first branch pipe and the above second branch pipe is a chiller connected to the above inlet pipe.

10. In Paragraph 9, A chiller in which a refrigerant is supplied to the supercooler through a branch pipe positioned downstream of the supercooler according to the flow direction of the liquid pipe among the first branch pipe and the second branch pipe.

11. In Paragraph 9, A chiller comprising a three-way valve connecting one of the first branch pipe and the second branch pipe to the inlet pipe.

12. In Paragraph 11, The above three-way valve is a chiller positioned opposite the direction of the connecting pipe relative to the above liquid pipe.

13. In Paragraph 1, A chiller in which the diameter of the above connecting pipe is formed to be smaller than the diameter of the above liquid pipe.

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