Medium refrigerator

Abstract

To provide a medium refrigerator in which the accuracy of the attachment position of a compressor is easily secured.SOLUTION: A medium refrigerator according to at least one embodiment of the present disclosure comprises: a first frame of the medium refrigerator placed at the installation place of the medium refrigerator; a second frame installed on the first frame; a compressor installed on the second frame for compressing a refrigerant; an oil separator attached to an upper part of the second frame and supported by the second frame for separating, from the refrigerant, refrigerator oil contained in the refrigerant discharged from the compressor; and a condenser for the refrigerator compressed by the compressor supported by the first frame below the compressor.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present disclosure relates to a medium-sized refrigerator. [Background technology]

[0002] A refrigerator is equipped with a heat exchanger for exchanging heat with the compressed refrigerant, a receiver tank for storing the refrigerant, etc. These heat exchangers, receiver tanks, etc. have relatively high strength to withstand internal pressure. Therefore, from the perspective of reducing the size of refrigerators, compressors are often mounted on top of these heat exchangers, receiver tanks, etc. (See, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-173223 Summary of the Invention [Problem to be solved by the invention]

[0004] These heat exchangers, receiver tanks, etc. have a cylindrical shape to withstand internal pressure, so support members such as brackets for mounting the compressor must be installed on the sides of the heat exchangers, receiver tanks, etc.

[0005] If the height position of the support member deviates from its original height position, it can cause problems such as compressor vibration, so when installing the support member on the side of a heat exchanger, receiver tank, etc., it is necessary to ensure the accuracy of the height position of the support member. However, because the side surfaces of the heat exchanger, receiver tank, etc. are cylindrical, the installation position of the support member is easily shifted when the support member is installed, and the height position of the support member is easily shifted from the original height position.

[0006] In view of the above circumstances, at least one embodiment of the present disclosure has an object to provide a medium-sized refrigerator in which the accuracy of the mounting position of the compressor can be easily ensured. [Means for solving the problem]

[0007] A medium-sized refrigerator according to at least one embodiment of the present disclosure includes: a first frame for the medium-sized refrigerator placed at an installation location of the medium-sized refrigerator; a second stand installed on the first stand; a compressor for compressing a refrigerant, the compressor being installed on the second frame; an oil separator attached to an upper portion of the second frame and supported by the second frame for separating refrigeration oil contained in the refrigerant discharged from the compressor from the refrigerant; a condenser for the refrigerant compressed by the compressor, the condenser being supported by the first frame below the compressor; Equipped with. [Effects of the Invention]

[0008] According to at least one embodiment of the present disclosure, it becomes easier to ensure the accuracy of the mounting position of the compressor. [Brief explanation of the drawings]

[0009] [Figure 1A] FIG. 1 is a plan view of a refrigerator according to an embodiment. [Figure 1B] FIG. 1 is a front view of a refrigerator according to an embodiment. [Figure 2A] FIG. 10 is a plan view of a refrigerator according to another embodiment. [Figure 2B] FIG. 10 is a front view of a refrigerator according to another embodiment. [Figure 3A] FIG. 10 is a plan view of a refrigerator according to another embodiment. [Figure 3B] FIG. 10 is a front view of a refrigerator according to another embodiment. [Figure 4] 1B is a plan view showing a state in which the compressor is moved to the front in the depth direction in the refrigerator shown in FIG. 1A and FIG. [Figure 5] 2C is a plan view showing a state in which the compressor in the refrigerator shown in FIGS. 2A and 2B has been moved to the right in the width direction. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, several embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement exactly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions representing shapes such as a square shape or a cylindrical shape not only represent shapes such as a square shape or a cylindrical shape in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. On the other hand, the expressions "comprise," "include," "have," "includes," or "have" of one element are not exclusive expressions that exclude the presence of other elements.

[0011] FIG. 1A is a plan view of a refrigerator 1 according to one embodiment. FIG. 1B is a front view of the refrigerator 1 according to one embodiment. FIG. 2A is a plan view of a refrigerator 1 according to another embodiment. FIG. 2B is a front view of the refrigerator 1 according to another embodiment. FIG. 3A is a plan view of a refrigerator 1 according to another embodiment. FIG. 3B is a front view of the refrigerator 1 according to another embodiment. 1A to 3B is a medium-sized refrigerator having a refrigeration tonnage of 5 tons or more and less than 50 tons. The refrigerator 1 according to some embodiments includes a refrigerant system 3.

[0012] In the refrigerator 1 according to some embodiments, the refrigerant system 3 includes a compressor 31, an oil separator 32, and a condenser 33. In the refrigerant system 3, for example, an ammonia refrigerant is used as the refrigerant, but a refrigerant other than an ammonia refrigerant may also be used.

[0013] In addition, the refrigerator 1 according to some embodiments may have the refrigerant system 3 as a primary refrigerant circulation system, and may include a secondary refrigerant circulation system connected to the refrigerant system 3 via a heat exchanger (not shown).

[0014] In the refrigerator 1 according to some embodiments configured as described above, the gaseous refrigerant compressed by the compressor 31 in the refrigerant system 3 is sent to the oil separator 32, where the refrigeration oil is separated. The refrigerant from the oil separator 32 is condensed and liquefied in the condenser 33 via a pipe 34 connecting the oil separator 32 and the condenser 33, and is sent as a refrigerant liquid to a heat exchanger (not shown). The refrigerant vaporized in the heat exchanger is sent to the compressor 31 and compressed. The upstream end of the pipe 34 is connected to the top of the oil separator 32, and the downstream end of the pipe 34 is connected to the upstream end of a refrigerant inlet pipe 33a of the condenser 33, which will be described later. In addition, in each drawing, the piping connecting the compressor 31 and the oil separator 32 and the piping connecting the heat exchanger and the compressor 31 are omitted.

[0015] (Arrangement of each device in refrigerator 1) The refrigerator 1 according to some embodiments includes a first frame 20 that is placed at the installation location, so that the components of the refrigerator 1 can be installed together at the installation location of the refrigerator 1. The first frame 20 has a plurality of beams 22 provided within a frame 21 that is assembled in a rectangular shape in a plan view, for example. In the refrigerator 1 according to some embodiments, each device that constitutes the refrigerator is supported by the first frame 20 or supported via a second frame 100, which will be described later. In the following explanation, when we say that an equipment is supported or attached to the first stand 20, it does not only mean that the attachment parts of the equipment, such as the legs of the equipment, are directly attached to the first stand 20, but also includes the equipment being attached to the first stand 20 via a relatively small metal fitting (hereinafter also referred to as a bracket) for attaching the equipment or a seat provided on the first stand 20. For ease of explanation, the width direction (horizontal direction), depth direction (horizontal direction), and up-down direction (vertical direction) are the directions shown in each figure. In the depth direction, the front side of the paper in Figures 1B, 2B, and 3B is the front side in the depth direction, and the back side of the paper is the back side in the depth direction.

[0016] In some embodiments of the refrigerator 1, the compressor 31 and oil separator 32 of the refrigerant system 3 are mounted on a second frame 100 installed on the first frame 20, and the condenser 33 is mounted on the first frame 20.

[0017] In the refrigerator 1 according to some embodiments, the central axis AX1 of the compressor 31 extends in the horizontal direction. In the refrigerator 1 shown in Figures 1A, 1B, 3A, and 3B, the central axis AX1 of the compressor 31 extends in the width direction. In the refrigerator 1 shown in Figures 2A and 2B, the central axis AX1 of the compressor 31 extends in the depth direction. Note that the central axis AX1 of the compressor 31 only needs to extend in the horizontal direction, and does not necessarily have to extend in the width direction or the depth direction. In the refrigerator 1 according to some embodiments, the central axis AX2 of the cylindrical condenser 33 extends in the width direction, but may also extend in a horizontal direction other than the width direction, or may also extend in the vertical direction. In the refrigerator 1 according to some embodiments, the central axis AX3 of the cylindrical oil separator 32 extends in the up-down direction (vertical direction).

[0018] In the refrigerator 1 according to some embodiments, the first frame 20 is a frame having a rectangular shape with sides in the width direction and depth direction in a plan view. In addition, in some embodiments of the refrigerator 1, when the refrigerant system 3 is a primary refrigerant circulation system and is equipped with a secondary refrigerant circulation system connected to the refrigerant system 3 via a heat exchanger (not shown), at least some of the equipment in the secondary refrigerant circulation system may be installed on the first frame 20.

[0019] (Second frame 100) In the refrigerator 1 according to some embodiments, the second frame 100 includes a plurality of columns 101 extending in the vertical direction and erected on the first frame 20, and a plurality of beams 103 extending in the horizontal direction and connecting the upper ends of the columns 101. The beams 103 also include a beam connecting two beams 103 arranged apart in the horizontal direction. The second frame 100 is fixed by connecting the lower ends of a plurality of support columns 101 to the first frame 20 with fastening members such as bolts. In the refrigerator 1 according to some embodiments, the second frame 100 includes a compressor support portion 105 that supports the compressor 31, and an oil separator support portion 107 that supports the oil separator 32. In the refrigerator 1 shown in Figures 1A, 1B, 2A, and 2B, the compressor support part 105 and the oil separator support part 107 are connected and fixed by fastening members such as bolts. That is, the second frame 100 shown in Figures 1A, 1B, 2A, and 2B is configured so that the compressor support part 105 and the oil separator support part 107 are separable.

[0020] 3A and 3B, the compressor support part 105 and the oil separator support part 107 are integrally formed. In this case, the structure of the second frame 100 can be simplified compared to the second frame 100 shown in FIGS. 1A, 1B, 2A, and 2B.

[0021] In the refrigerator 1 according to some embodiments, the second frame 100 is a frame having a rectangular shape with sides in the width direction and depth direction in a plan view. In the refrigerator 1 shown in Figures 1A, 1B, 3A, and 3B, the second frame 100 is attached to the first frame 20 so that, in a plan view, the beam 103A on the front side in the depth direction of the beams 103 extending in the width direction coincides with the part of the frame 21 assembled in a rectangular shape on the first frame 20 that corresponds to the side 21a on the front side in the depth direction. In the refrigerator 1 shown in Figures 2A and 2B, the second frame 100 is attached to the first frame 20 so that, in a plan view, of the beams 103 extending in the depth direction, the beam 103B on the right side in the figure coincides with the part of the frame 21 assembled into a rectangular shape in the first frame 20 that corresponds to the right side 21b in the figure.

[0022] (Support for the compressor 31) In the refrigerator 1 according to some embodiments, the compressor 31 is attached to the upper part of the compressor support portion 105 of the second frame 100. According to the refrigerator 1 of some embodiments, by placing the second frame 100 on the first frame 20, it becomes easy to ensure the accuracy of the mounting position of the compressor 31 placed on the second frame 100. That is, according to the refrigerator 1 according to some embodiments, it becomes easy to ensure the accuracy of the mounting position of the compressor 31 in a medium-sized refrigerator.

[0023] A support portion 105a (see FIGS. 1B, 2B, and 3B) that supports from below the leg portion 31a (see FIGS. 1A, 2A, and 3A) of the compressor 31 is formed on the upper portion of the compressor support portion 105. In the refrigerator 1 according to some embodiments, a slide plate 111 is arranged between the support portion 105a and the leg portion 31a of the compressor 31. The sliding plate 111 is a plate-shaped member made of, for example, resin.

[0024] The legs 31a of the compressor 31 are fixed to the support portion 105a by fastening members such as bolts. For example, when removing the compressor 31 from the second frame 100 for maintenance or the like, the fastening members such as bolts that secure the legs 31a can be removed, and the legs 31a can be slid on the sliding plate 111, thereby making it possible to move the compressor 31 horizontally relatively easily.

[0025] FIG. 4 is a plan view showing a state in which the compressor 31 is moved forward in the depth direction in the refrigerator 1 shown in FIGS. 1A and 1B. FIG. 5 is a plan view showing a state in which the compressor 31 in the refrigerator 1 shown in FIGS. 2A and 2B has been moved to the right in the width direction. 1A, 1B, 3A, and 3B, the compressor 31 can be moved to the front side in the depth direction as shown in Fig. 4. Then, the compressor 31 can be remounted on a cart (not shown) or the like arranged near the side surface (front face) of the first frame 20 on the front side in the depth direction. 2A and 2B, for example, the compressor 31 can be moved to the right side in the width direction as shown in Fig. 5. Then, the compressor 31 can be remounted on a cart (not shown) or the like arranged near the right side surface of the first frame 20 in the width direction as shown. As a result, the slide plate 111 makes it easy to pull out the compressor 31 to the side of the refrigerator 1, that is, to the side in the depth direction or width direction, and therefore maintenance of the compressor 31 becomes easy.

[0026] (Support for the oil separator 32) In the refrigerator 1 according to some embodiments, the oil separator 32 is supported on the upper part of the oil separator support portion 107 in an upright position so that the central axis AX3 faces in the vertical direction, i.e., so that the longitudinal direction of the oil separator 32 coincides with the vertical direction. In the refrigerator 1 according to some embodiments, the oil separator support portion 107 has a plurality of beams 103 connected to surround the oil separator 32 in a plan view. The oil separator 32 is supported by the plurality of beams 103 connected to surround the oil separator 32. The oil separator 32 passes through an opening 107a in the vertical direction, which is formed by the plurality of beams 103 connected to surround the oil separator 32 in a plan view. In other words, the oil separator 32 is supported by the plurality of beams 103 midway along its longitudinal direction.

[0027] In the refrigerator 1 according to some embodiments, a plurality of valves 35 are provided in a pipe 34 connecting the oil separator 32 and the condenser 33. The plurality of valves 35 provided in the pipe 34 include a check valve 36 and a pressure regulating valve 37. In the pipe 34, a check valve 36 and a pressure adjustment valve 37 are arranged in this order from the upstream side of the flow of the refrigerant flowing from the oil separator 32 toward the condenser 33. In the refrigerator 1 according to some embodiments, the check valve 36 is arranged above the top of the oil separator 32.

[0028] The piping 34 is supported by being fixed to the second frame 100 at multiple points along the path between the oil separator 32 and the condenser 33. That is, the piping 34 is fixed to the oil separator support part 107 or the compressor support part 105. As shown in each drawing, the piping 34 may be fixed to the second frame 100 via a bracket 108. Furthermore, for example, the pressure regulating valve 37 is supported by being fixed to the oil separator support portion 107 via a bracket 109 . In the refrigerator 1 according to some embodiments, the oil separator 32 is supported by the second frame 100, thereby ensuring the accuracy of the position of the oil separator 32 relative to the second frame 100. Therefore, the difference between the designed position and dimensions of the piping 34 connecting the oil separator 32 and the condenser 33 is also reduced, making it easier to support the piping on the second frame 100. This facilitates the installation of the piping connecting the oil separator 32 and the condenser 33 when assembling the refrigerator 1.

[0029] In the refrigerator 1 according to some embodiments, for example, the check valve 36 and the pressure regulating valve 37 are arranged above a plurality of beams 103 that are connected to surround the oil separator 32 in a plan view. This makes it easier to see the check valve 36 and the pressure regulating valve 37 arranged above the multiple beams 103 from above during inspection.

[0030] (Regarding condenser 33) In the refrigerator 1 according to some embodiments, the condenser 33 is supported by the first frame 20 below the compressor 31. 1A, 1B, 2A, and 2B, as described above, the second frame 100 is configured so that the compressor support part 105 and the oil separator support part 107 can be separated. Therefore, by removing the compressor support part 105 from the first frame 20 while the oil separator support part 107 remains attached to the first frame 20, the columns 101 and beams 103 of the compressor support part 105 that surrounded the condenser 33 are removed from the first frame 20, and the condenser 33 is exposed. This makes it easier to maintain the condenser 33.

[0031] The condenser 33 is provided with a refrigerant inlet pipe 33a that projects upward from the side of the condenser 33 and receives the primary refrigerant from the oil separator 32. The upstream end of the refrigerant inlet pipe 33a is separably connected to the downstream end of the pipe 34 by a pipe joint such as a flange joint. The refrigerant inlet pipe 33a protrudes directly from the side of the condenser 33 and cannot be separated from the condenser 33 unless it is cut or the like.

[0032] 1A, 1B, 2A, and 2B, the second frame 100 is configured so that the compressor support part 105 and the oil separator support part 107 can be separated as described above. Therefore, even if the compressor support part 105 interferes when the condenser 33 is moved out of the first frame 20, the condenser 33 can be removed from the first frame 20 and moved out of the first frame 20 by removing the compressor support part 105 from the first frame 20 while the oil separator support part 107 remains attached to the first frame 20.

[0033] Thus, according to the refrigerator 1 shown in Figures 1A, 1B, 2A, and 2B, the compressor 31 and the compressor support portion 105 in the second frame 100 can be removed, making it easier to remove the condenser 33 from the first frame 20. This allows the condenser 33 to be removed from the first frame 20 for easy maintenance.

[0034] The condenser 33 and the piping such as the refrigerant inlet piping 33a extending from the condenser 33 may be able to be carried out to the outside of the second frame 100 through an opening surrounded by the support columns 101 or beams 103 of the second frame 100. For example, in the chiller 1 shown in FIGS. 1B, 2B, and 3B, the condenser 33 and the piping such as the refrigerant inlet piping 33a extending from the condenser 33 can be carried out to the outside of the second frame 100 through an opening 100a surrounded by at least the support columns 101 and beams 103 on the front side in the depth direction (see FIGS. 1B, 2B, and 3B). In this case, even if the compressor support part 105 and the oil separator support part 107 are integrally formed as shown in Figures 3A and 3B, the condenser 33 can be removed from the first frame 20 to perform maintenance without removing the second frame 100 from the first frame 20.

[0035] The present disclosure is not limited to the above-described embodiments, but also includes modifications to the above-described embodiments and appropriate combinations of these modifications. In the above-described embodiment, the components supported by the second frame 100 were the compressor 31, the oil separator 32, the piping 34, etc., but other components may also be supported by the second frame 100. For example, if an oil cooler (not shown) is provided to cool the refrigeration oil separated by the oil separator 32, the piping for returning the refrigeration oil from the oil cooler to the compressor 31 may be supported on the second frame 100 (compressor support portion 105).

[0036] The contents described in each of the above embodiments can be understood, for example, as follows. (1) A medium-sized refrigerator (refrigerator 1) according to at least one embodiment of the present disclosure includes a first frame 20 for the medium-sized refrigerator (refrigerator 1) placed at an installation location for the medium-sized refrigerator (refrigerator 1), a second frame 100 installed on the first frame 20, a compressor 31 for compressing a refrigerant installed on the second frame 100, an oil separator 32 attached to the top of the second frame 100 and supported by the second frame 100 for separating refrigeration oil contained in the refrigerant discharged from the compressor 31 from the refrigerant, and a condenser 33 for the refrigerant compressed by the compressor 31 supported by the first frame 20 below the compressor 31.

[0037] According to the above configuration (1), by placing the second frame 100 on the first frame 20, it becomes easy to ensure the accuracy of the mounting position of the compressor 31 placed on the second frame 100.

[0038] (2) In some embodiments, the configuration of (1) above may include a sliding plate 111 disposed between the top of the second frame 100 and the legs 31a of the compressor 31, for sliding the compressor 31 along the top surface of the second frame 100 on the second frame 100.

[0039] According to the configuration (2) above, the slide plate 111 makes it easy to pull out the compressor 31 to the side of the medium-sized refrigerator (refrigerator 1), so maintenance of the compressor 31 becomes easy.

[0040] (3) In some embodiments, in the configuration of (1) or (2) above, the oil separator 32 may be disposed at a position separated from the compressor 31 in a plan view. The second frame 100 may be configured such that a portion supporting the compressor 31 (compressor support portion 105) and a portion supporting the oil separator 32 (oil separator support portion 107) are separable in a plan view.

[0041] According to the configuration (3) above, maintenance of the condenser 33 can be easily performed by removing the compressor 31 and the portion of the second frame 100 that supports the compressor 31 in a plan view (compressor support portion 105).

[0042] (4) In some embodiments, in the configuration of (1) or (2) above, the oil separator 32 may be disposed at a position separated from the compressor 31 in a plan view. The second frame 100 may have a portion that supports the compressor 31 (compressor support portion 105) and a portion that supports the oil separator 32 (oil separator support portion 107) that are integrally formed in a plan view.

[0043] According to the configuration (4) above, the structure of the second frame 100 can be simplified compared to when the part supporting the compressor 31 (compressor support part 105) and the part supporting the oil separator 32 (oil separator support part 107) are separable.

[0044] (5) In some embodiments, in the configuration of (4) above, the condenser 33 and the piping extending from the condenser 33 (refrigerant inlet piping 33a) may be able to be carried out to the outside of the second frame 100 through an opening surrounded by the support pillars 101 or beams 103 of the second frame 100.

[0045] According to the configuration (5) above, even if the part supporting the compressor 31 (compressor support part 105) and the part supporting the oil separator 32 (oil separator support part 107) are integrally formed, the condenser 33 can be removed from the first frame 20 for maintenance without removing the second frame 100 from the first frame 20.

[0046] (6) In some embodiments, in any of the configurations (1) to (5) above, the second frame 100 may have a plurality of beams 103 connected to surround the oil separator 32 in a plan view.

[0047] According to the above configuration (6), the oil separator 32 can be supported by the plurality of beams 103.

[0048] (7) In some embodiments, the configuration of (6) above may further include a plurality of valves 35 provided in the pipe 34 connecting the oil separator 32 and the condenser 33. At least some of the valves 35 may be disposed above the beams 103.

[0049] According to the configuration (7) above, the valves 35 arranged above the beams 103 can be easily seen from above when inspecting the valves 35.

[0050] (8) In some embodiments, in any of the configurations (1) to (7) above, a pipe 34 may be provided that connects the oil separator 32 and the condenser 33. The pipe 34 that connects the oil separator 32 and the condenser 33 may be supported by the second frame 100.

[0051] According to the configuration (8) above, the oil separator 32 is supported by the second frame 100, thereby ensuring the accuracy of the position of the oil separator 32 relative to the second frame 100. Therefore, the difference between the designed position and dimensions of the piping 34 connecting the oil separator 32 and the condenser 33 is also reduced, making it easier to support the oil separator 32 on the second frame 100. This facilitates the installation of the piping 34 connecting the oil separator 32 and the condenser 33 when assembling the medium-sized chiller (chiller 1).

[0052] (9) In some embodiments, in any of the configurations (1) to (8) above, the medium-sized refrigerator (refrigerator 1) has a refrigeration tonnage of 5 tons or more and less than 50 tons.

[0053] According to the configuration (9) above, in a medium-sized chiller (chiller 1) with a refrigeration tonnage of 5 tons or more and less than 50 tons, it becomes easy to ensure the accuracy of the mounting position of the compressor 31. [Explanation of symbols]

[0054] 1. Freezer 3 Refrigerant system 20 First Mount 21 slots 31 Compressor 31a Legs 32 Oil separator 33 Condenser 33a Refrigerant inlet pipe 34 Piping 35 valves 36 Check valve 37 Pressure Regulating Valve 100 Second Mount 101 Post 103, 103A beam 105 Compressor support 105a Support part 107 Oil separator support 111 Slide

Claims

1. a first frame for the medium-sized refrigerator placed at an installation location of the medium-sized refrigerator; a second stand installed on the first stand; a compressor for compressing a refrigerant, the compressor being installed on the second frame; an oil separator attached to an upper portion of the second frame and supported by the second frame for separating refrigeration oil contained in the refrigerant discharged from the compressor from the refrigerant; a condenser for refrigerant compressed by the compressor, the condenser being supported by the first frame below the compressor; A medium-sized freezer equipped with

2. a slide plate disposed between an upper portion of the second frame and legs of the compressor, for sliding the compressor on the second frame along an upper surface of the second frame; Equipped with The medium-sized refrigerator according to claim 1.

3. the oil separator is disposed at a position separated from the compressor in a plan view, The second frame is configured so that a portion supporting the compressor and a portion supporting the oil separator are separable in the plan view. The medium-sized refrigerator according to claim 1 or 2.

4. the oil separator is disposed at a position separated from the compressor in a plan view, In the second frame, a portion supporting the compressor and a portion supporting the oil separator are integrally formed in the plan view. The medium-sized refrigerator according to claim 1 or 2.

5. the condenser and the piping extending from the condenser can be carried out to the outside of the second frame through an opening surrounded by supports or beams of the second frame. The medium-sized refrigerator according to claim 4.

6. The second frame has a plurality of beams connected to surround the oil separator in a plan view. The medium-sized refrigerator according to claim 1 or 2.

7. a plurality of valves provided in a pipe connecting the oil separator and the condenser; Equipped with At least a portion of the valve is disposed above the plurality of beams. The medium-sized refrigerator according to claim 6.

8. a pipe connecting the oil separator and the condenser; Equipped with The piping connecting the oil separator and the condenser is supported by the second frame. The medium-sized refrigerator according to claim 1 or 2.

9. The medium-sized refrigerator has a refrigeration tonnage of 5 tons or more and less than 50 tons. The medium-sized refrigerator according to claim 1 or 2.

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