Heat source unit and heat source unit group

Abstract

To facilitate an attachment / detachment of a protective member for protecting a heat exchanger stored in a casing.SOLUTION: A heat source unit includes: a casing (40); heat exchangers (12A, 12B, 12C, 12D) provided inside frames (FM1, FM2, FM3, FM4) configuring inlet ports (I1, I2, I3, I4) of the casing (40); and a protective member (100) for protecting the heat exchangers (12A, 12B, 12C, 12D) by covering the frame parts (FM1, FM2, FM3, FM4) from outside. The frame parts (FM1, FM2, FM3, FM4) are inclined upward on an outside of the casing (40). The protective member (100) includes a first engagement part (130) and a fixing part (140) positioned below the first engagement part (130). The first engagement part (130) engages with a second engagement part (150) formed on the frame parts (FM1, FM2, FM3, FM4), and the fixing part (140) is fixed to the frame parts (FM1, FM2, FM3, FM4).SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present disclosure relates to a heat source unit and a group of heat source units.

Background Art

[0002] Patent Document 1 discloses an outdoor unit in which a protective net is attached to a surface exposed outside an outdoor heat exchanger. The protective net is provided so as to cover the surface of the outdoor heat exchanger from the outside of the outdoor unit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, depending on the size and shape of a heat source unit such as the above-described outdoor heat exchanger, it may be difficult to attach a protective member for protecting the surface of the heat exchanger. For example, when the heat source unit is so large that an operator's hand cannot reach the upper end of the casing, the operator needs to use a stepladder or the like to perform the attachment work of the protective member. Further, in the case of a heat source unit in which the surface of the heat exchanger is inclined toward the operator, the operator may have to perform the attachment work while bending the body. Thus, there is room for improvement in the attachment and detachment of the protective member provided on the heat exchanger.

[0005] An object of the present disclosure is to facilitate the attachment and detachment of a protective member for protecting a heat exchanger housed in a casing.

Means for Solving the Problems

[0006] The first aspect is a casing (40), and A heat exchanger (12A, 12B, 12C, 12D) disposed within a frame portion (FM1, FM2, FM3, FM4) that constitutes a suction port (I1, I2, I3, I4) of the casing (40); A protective member (100) that protects the heat exchanger (12A, 12B, 12C, 12D) by covering the frame portion (FM1, FM2, FM3, FM4) from the outside; The frame portion (FM1, FM2, FM3, FM4) is inclined outward of the casing (40) as it goes upward; The protective member (100) is provided with a first engaging portion (130) and a fixing portion (140) located below the first engaging portion (130); The first engaging portion (130) engages with a second engaging portion (150) formed on the frame portion (FM1, FM2, FM3, FM4), and the fixing portion (140) is fixed to the frame portion (FM1, FM2, FM3, FM4); It is a heat source unit.

[0007] In the first aspect, it is only necessary to engage the first engaging portion (130) and the second engaging portion (150), and fastening with a fastening member such as a screw or a bolt can be made unnecessary. Thereby, by simply fixing the fixing portion (140) to the frame portion (FM1, FM2, FM3, FM4), the protective member (100) can be attached to the casing (40). Also, by simply releasing the fixing of the fixing portion (140) and the frame portion (FM1, FM2, FM3, FM4), the protective member (100) can be removed from the casing (40). Thereby, for example, when the first engaging portion (130) is at a relatively high position, the operator can easily attach or remove the protective member (100) to or from the casing (40) without the need for a stepladder or the like. In addition, since the frame portion (FM1, FM2, FM3, FM4) is inclined, the fixing portion (140) disposed below the first engaging portion (130) can hold the protective member (100) in a posture along the inclined frame portion (FM1, FM2, FM3, FM4).

[0008] The second aspect is in the first aspect, The first engaging portion (130) is provided at the upper end of the protection member (100) and The second engaging portion (150) is provided on the upper side of the frame portions (FM1, FM2, FM3, FM4).

[0009] In the second aspect, the protection member (100) can be easily attached to the frame portions (FM1, FM2, FM3, FM4).

[0010] The third aspect is in the first or second aspect, A fastening member (B) fastened to the frame portions (FM1, FM2, FM3, FM4) is attached to the fixing portion (140).

[0011] In the third aspect, the protection member (100) can be easily fixed to the frame portions (FM1, FM2, FM3, FM4) by the fastening member (B).

[0012] The fourth aspect is in any one of the first to third aspects, The first engaging portion (130) is formed in a hook shape, The second engaging portion (150) is formed in a concave shape.

[0013] In the fourth aspect, the first engaging portion (130) and the second engaging portion (150) can be engaged relatively easily by a combination of a hook and a recess.

[0014] The fifth aspect is in any one of the first to third aspects, The first engaging portion (130) is formed so as to protrude from the outer edge of the protection member (100) toward the outside of the protection member (100), The second engaging portion (150) is formed in a groove shape or a hole shape so as to be inserted into the first engaging portion (130).

[0015] In the fifth aspect, the first engaging portion (130) and the second engaging portion (150) can be engaged relatively easily only by inserting the first engaging portion (130) into the second engaging portion (150).

[0016] In the sixth aspect, in any one of the first to fifth aspects, the second engaging portion (150) is at a height position of 1.5 m or more from the floor surface.

[0017] In the sixth aspect, since the second engaging portion (150) is at a relatively high height position, if the first engaging portion (130) and the second engaging portion (150) are configured to be fixed to each other, it may be necessary to perform the fixing work using a step ladder or the like. However, in the configuration of the present disclosure, since it is only necessary to engage the first engaging portion (130) and the second engaging portion (150) with each other, the protection member (100) can be attached to the frame portions (FM1, FM2, FM3, FM4) relatively easily even without a step ladder or the like.

[0018] In the seventh aspect, in any one of the first to sixth aspects, the fixing portion (140) is at a height position of 1 m or less from the floor surface in a state where the protection member (100) is attached to the frame portions (FM1, FM2, FM3, FM4).

[0019] In the seventh aspect, since the fixing portion (140) is at a relatively low height position, the fastening work of the fixing portion (140) can be performed relatively easily by a fastening member such as a bolt or a screw.

[0020] The eighth aspect is a plurality of heat source units according to any one of the first to seventh aspects, which are arranged adjacent to each other, wherein the protection member (100) of one of the adjacent heat source units faces the other heat source unit group.

[0021] In the eighth aspect, since the frame parts (FM1, FM2, FM3, FM4) are inclined, when adjacent heat source units are arranged close to each other, the space formed between two heat source units (1) is formed such that the gap becomes narrower from the bottom to the top. That is, the distance between adjacent heat source units (1) is the largest at the lower end of the frame parts (FM1, FM2, FM3, FM4) and the smallest at the upper end of the frame parts (FM1, FM2, FM3, FM4). For example, when fixing the protection member (100) to the upper end of the frame parts (FM1, FM2, FM3, FM4) using tools, it is necessary to perform the work in the narrowest space. In the present disclosure, even if the second engaging part (150) is arranged at the upper end of the frame, it is only necessary to engage the first engaging part (130) with the second engaging part (150), so that the fixing work using tools can be made unnecessary. Moreover, since the fixing part (140) located below the first engaging part (130) is arranged in a relatively wide space, the protection member (100) can be easily attached to and detached from the casing (40).

[0022] The ninth aspect is as follows in the eighth aspect. The first engaging part (130) is formed in a hook shape that catches on the second engaging part (150). The width of the hook part of the first engaging part (130) is shorter than the distance between adjacent heat source units.

[0023] In the ninth aspect, the length of the width of the hook part of the first engaging part (130) is smaller than the gap between adjacent heat source units. Specifically, since the length of the width of the hook part is smaller than the distance between two adjacent heat source units at the upper end of the frame parts (FM1, FM2, FM3, FM4), the first engaging part (130) can be inserted into the relatively narrow gap between adjacent heat source units (1) relatively easily, and the protection member (100) can be simply attached to the casing (40).

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

MODE FOR CARRYING OUT THE INVENTION

[0025] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. It should be noted that the present disclosure is not limited to the embodiments shown below, and various modifications can be made without departing from the technical idea of the present disclosure. Since each drawing is for conceptually explaining the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for easy understanding.

[0026] (1) Overview The heat source unit (1) according to the first embodiment is used as a heat source of an air conditioner. The air conditioner performs air conditioning in an office, a shopping mall, a factory, etc. The heat source unit (1) is a chilling unit dedicated to generating chilled water. The heat source unit (1) is an air-cooled chilling unit.

[0027] (2) Configuration of the refrigerant circuit The heat source unit (1) of the present embodiment has a plurality of refrigerant circuits (10). As shown in FIG. 1, the heat source unit (1) of this example has a first refrigerant circuit (10A), a second refrigerant circuit (10B), a third refrigerant circuit (10C), and a fourth refrigerant circuit (10D). The number of refrigerant circuits (10) is merely an example, and it may be one, two, three, or five or more. The basic configurations of the first refrigerant circuit (10A), the second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D) are the same. In FIG. 1, for the sake of convenience, the detailed illustration of the third refrigerant circuit (10C) and the fourth refrigerant circuit (10D) is omitted. Each refrigerant circuit (10) is filled with a refrigerant. Each refrigerant circuit (10) performs a vapor compression refrigeration cycle by circulating the refrigerant.

[0028] The first refrigerant circuit (10A) mainly has a first compressor (11A), a first air heat exchanger (12A), and a first expansion valve (13A). The first refrigerant circuit (10A) has a first subcooling heat exchanger (14A) and a first accumulator (15A).

[0029] The first compressor (11A) compresses the inhaled refrigerant and discharges the compressed refrigerant. The first compressor (11A) is, for example, a scroll compressor, but it may be other types of compressors such as screw type, turbo type, and rotary type. The first air heat exchanger (12A) is an outdoor heat exchanger that exchanges heat between the refrigerant and outdoor air. The first air heat exchanger (12A) is a fin-and-tube type heat exchanger. The first air heat exchanger (12A) in this example functions only as a radiator (condenser) that dissipates heat from the refrigerant. The first expansion valve (13A) reduces the pressure of the condensed refrigerant. The first expansion valve (13A) is, for example, an electronic expansion valve. The first subcooling heat exchanger (14A) cools the refrigerant after heat dissipation and increases the subcooling degree of the refrigerant. The first subcooling heat exchanger (14A) exchanges heat between the refrigerant in the first liquid flow path (L1) and the refrigerant in the second liquid flow path (L2).

[0030] The refrigerant circuit (10) has, as elements constituting the refrigerant piping, a discharge pipe (20), a liquid pipe (21), an injection pipe (22), a gas pipe (23), and a suction pipe (24). The discharge pipe (20) connects the discharge side of the first compressor (11A) and the gas end of the first air heat exchanger (12A). The liquid pipe (21) connects the gas end of the first air heat exchanger (12A) and the inflow end of the first refrigerant flow path (R1) of the first water heat exchanger (31). One end of the injection pipe (22) is connected to the upstream portion of the first subcooling heat exchanger (14A) in the liquid pipe (21). The other end of the injection pipe (22) is connected to the intermediate pressure portion (during compression) of the first compressor (11A). A cooling expansion valve (25) is provided in the upstream portion of the first subcooling heat exchanger (14A) in the injection pipe (22). The gas pipe (23) connects the outflow end of the first refrigerant flow path (R1) of the first water heat exchanger (31) and the first accumulator (15A). The suction pipe (24) connects the first accumulator (15A) and the suction side of the first compressor (11A).

[0031] The elements of the second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D) are basically the same as those of the first refrigerant circuit (10A).

[0032] The second refrigerant circuit (10B) mainly includes a second compressor (11B), a second air heat exchanger (12B), and a second expansion valve (13B). The second refrigerant circuit (10B) includes a second subcooling heat exchanger (14B) and a second accumulator (15B). The liquid pipe (21) of the second refrigerant circuit (10B) connects the gas end of the second air heat exchanger (12B) and the inlet end of the second refrigerant flow path (R2) of the first water heat exchanger (31). The gas pipe (23) of the second refrigerant circuit (10B) connects the outlet end of the second refrigerant flow path (R2) of the first water heat exchanger (31) and the second accumulator (15B).

[0033] The third refrigerant circuit (10C) mainly includes a third compressor (11C), a third air heat exchanger (12C), and a third expansion valve (13C). The third refrigerant circuit (10C) includes a third subcooling heat exchanger (14C) and a third accumulator (15C). The liquid pipe (21) of the third refrigerant circuit (10C) connects the gas end of the third air heat exchanger (12C) and the inlet end of the third refrigerant flow path (R3) of the second water heat exchanger (32). The gas pipe (23) of the third refrigerant circuit (10C) connects the outlet end of the third refrigerant flow path (R3) of the second water heat exchanger (32) and the third accumulator (15C).

[0034] The fourth refrigerant circuit (10D) mainly includes a fourth compressor (11D), a fourth air heat exchanger (12D), and a fourth expansion valve (13D). The fourth refrigerant circuit (10D) includes a fourth subcooling heat exchanger (14D) and a fourth accumulator (15D). The liquid pipe (21) of the fourth refrigerant circuit (10D) connects the gas end of the fourth air heat exchanger (12D) and the inlet end of the fourth refrigerant flow path (R4) of the second water heat exchanger (32). The gas pipe (23) of the fourth refrigerant circuit (10D) connects the outlet end of the fourth refrigerant flow path (R4) of the second water heat exchanger (32) and the fourth accumulator (15D).

[0035] (3) Water circuit As shown in FIG. 1, the heat source unit (1) has a water circuit (30) through which water flows. In the water circuit (30), a pump (33), a first water heat exchanger (31), and a second water heat exchanger (32) are connected in order from the upstream side to the downstream side of the water flow. The pump (33) conveys the water in the water circuit (30). The first water heat exchanger (31) and the second water heat exchanger (32) are, for example, plate heat exchangers. The first water heat exchanger (31) and the second water heat exchanger (32) exchange heat between the refrigerant and water. The first water heat exchanger (31) and the second water heat exchanger (32) are counter-flow heat exchangers.

[0036] The first water heat exchanger (31) has a first water flow path (W1), a first refrigerant flow path (R1), and a second refrigerant flow path (R2). The first water flow path (W1) is connected to the water circuit (30), the first refrigerant flow path (R1) is connected to the first refrigerant circuit (10A), and the second refrigerant flow path (R2) is connected to the second refrigerant circuit (10B). The first water heat exchanger (31) exchanges heat between the water in the first water flow path (W1) and the refrigerant in the first refrigerant circuit (10A). The first water heat exchanger (31) exchanges heat between the water in the first water flow path (W1) and the refrigerant in the second refrigerant circuit (10B).

[0037] The second water heat exchanger (32) has a second water flow path (W2), a third refrigerant flow path (R3), and a fourth refrigerant flow path (R4). The second water flow path (W2) is connected to the water circuit (30), the third refrigerant flow path (R3) is connected to the third refrigerant circuit (10C), and the fourth refrigerant flow path (R4) is connected to the fourth refrigerant circuit (10D). The second water heat exchanger (32) exchanges heat between the water in the second water flow path (W2) and the refrigerant in the third refrigerant circuit (10C). The second water heat exchanger (32) exchanges heat between the water in the second water flow path (W2) and the refrigerant in the fourth refrigerant circuit (10D).

[0038] (4) Structure of the heat source unit The detailed configuration of the heat source unit (1) will be described with reference to FIGS. 2 to 7. In the following description, the terms related to "front", "rear", "right", "left", "upper", and "lower" are based on the directions indicated by the arrows in FIG. 2. In the following description, the first direction corresponds to the left-right direction which is a horizontal direction, the second direction corresponds to the front-rear direction which is a horizontal direction, and the third direction corresponds to the up-down direction which is a vertical direction.

[0039] (4-1) Casing The heat source unit (1) has a hollow casing (40). The casing (40) is formed in a horizontally long shape where the length in the left-right direction (the first direction) is larger than the length in the front-rear direction (the second direction). As shown in FIG. 5, when viewed from the first direction, the casing (40) has a shape in which the width in the front-rear direction at its upper part expands.

[0040] The casing (40) has a lower housing part (41) and an upper housing part (42). The lower housing part (41) includes the lower end of the casing (40). The upper housing part (42) includes the upper end of the casing (40) and is located above the lower housing part (41). Inside the lower housing part (41), a machine room (S1) which is the first chamber is formed. Inside the upper housing part (42), a blower room (S2) which is the second chamber is formed. The lower housing part (41) has a main body part (41a) having a rectangular parallelepiped outer shape and an extension part (41b) extending outward in the first direction (rightward) from the right end of the main body part (41a).

[0041] The casing (40) has a plurality of frames and a plurality of outer plates detachably attached to the plurality of frames. The plurality of frames is a framework for fixing the outer plates of the casing (40). The plurality of frames constitutes columns or beams. The plurality of frames has the function of a reinforcing member for reinforcing the casing (40). The outer plates shield the inside and outside of the casing (40). The frames and the outer plates are made of a metal material such as iron or aluminum.

[0042] As shown in FIGS. 2 to 4, the lower housing portion (41) has, as a frame, a first horizontal frame (Fa1), a second horizontal frame (Fa2), a third horizontal frame (Fa3), and a fourth horizontal frame (Fa4). These horizontal frames are formed in a long plate shape extending in the first direction. In other words, these horizontal frames have the first direction as their longitudinal direction. The first horizontal frame (Fa1) is located at the lower end of the front surface of the lower housing portion (41). The second horizontal frame (Fa2) is located at the upper end of the front surface of the lower housing portion (41). The third horizontal frame (Fa3) is located at the lower end of the rear surface of the lower housing portion (41). The fourth horizontal frame (Fa4) is located at the upper end of the rear surface of the lower housing portion (41).

[0043] The lower housing portion (41) has, as a frame, a plurality of first vertical frames (Fb1) and a plurality of second vertical frames (Fb2). These vertical frames are formed in a long plate shape extending in the third direction, which is the vertical direction. In other words, these vertical frames have the third direction as their longitudinal direction. The first vertical frame (Fb1) is located on the front surface of the casing (40) and is formed from the first horizontal frame (Fa1) to the second horizontal frame (Fa2). The second vertical frame (Fb2) is located on the rear surface of the casing (40) and is formed from the first horizontal frame (Fa1) to the second horizontal frame (Fa2).

[0044] The lower housing portion (41) has, as an outer plate, a plurality of lower front plates (P1) and a plurality of lower rear plates (P2). The lower front plates (P1) and the lower rear plates (P2) are formed in a rectangular plate shape. The lower front plate (P1) is located on the front surface of the lower housing portion (41). The lower front plate (P1) is detachably attached to the first horizontal frame (Fa1), the second horizontal frame (Fa2), and the first vertical frame (Fb1). The lower rear plate (P2) is located on the rear surface of the lower housing portion (41). The lower rear plate (P2) is detachably attached to the third horizontal frame (Fa3), the fourth horizontal frame (Fa4), and the second vertical frame (Fb2).

[0045] The upper housing part (42) has, as a frame, a fifth horizontal frame (Fa5), a sixth horizontal frame (Fa6), a seventh horizontal frame (Fa7), and an eighth horizontal frame (Fa8). These horizontal frames are formed in a long plate shape extending in the first direction. In other words, these horizontal frames have the first direction as their longitudinal direction. The fifth horizontal frame (Fa5) is located at the lower end of the front surface of the upper housing part (42). The sixth horizontal frame (Fa6) is located near the upper end of the front surface of the upper housing part (42). The seventh horizontal frame (Fa7) is located at the lower end of the rear surface of the upper housing part (42). The eighth horizontal frame (Fa8) is located near the upper end of the rear surface of the upper housing part (42).

[0046] The upper housing part (42) has, as a frame, a first intermediate vertical frame (Fc1), a second intermediate vertical frame (Fc2), a third intermediate vertical frame (Fc3), a fourth intermediate vertical frame (Fc4), a fifth intermediate vertical frame (Fc5), a sixth intermediate vertical frame (Fc6), a seventh intermediate vertical frame (Fc7), and an eighth intermediate vertical frame (Fc8).

[0047] The first intermediate vertical frame (Fc1) is located at the left end of the front surface of the upper housing part (42), and the second intermediate vertical frame (Fc2) is located at the right end of the front surface of the upper housing part (42). The third intermediate vertical frame (Fc3) and the fourth intermediate vertical frame (Fc4) are located in the middle in the left - right direction of the front surface of the upper housing part (42). The third intermediate vertical frame (Fc3) is closer to the left end of the upper housing part (42) than the fourth intermediate vertical frame (Fc4). The first intermediate vertical frame (Fc1), the second intermediate vertical frame (Fc2), the third intermediate vertical frame (Fc3), and the fourth intermediate vertical frame (Fc4) are inclined so as to approach the front side as they go upward. In other words, the first intermediate vertical frame (Fc1), the second intermediate vertical frame (Fc2), the third intermediate vertical frame (Fc3), and the fourth intermediate vertical frame (Fc4) are inclined so as to face obliquely downward.

[0048] The fifth intermediate vertical frame (Fc5) is located at the left end of the rear surface of the upper housing part (42), and the sixth intermediate vertical frame (Fc6) is located at the right end of the rear surface of the upper housing part (42). The seventh intermediate vertical frame (Fc7) and the eighth intermediate vertical frame (Fc8) are located at the middle part in the left - right direction of the rear surface of the upper housing part (42). The seventh intermediate vertical frame (Fc7) is closer to the left end of the upper housing part (42) than the eighth intermediate vertical frame (Fc8). The fifth intermediate vertical frame (Fc5), the sixth intermediate vertical frame (Fc6), the seventh intermediate vertical frame (Fc7), and the eighth intermediate vertical frame (Fc8) are inclined so as to approach the rear side as they go upward. In other words, the fifth intermediate vertical frame (Fc5), the sixth intermediate vertical frame (Fc6), the seventh intermediate vertical frame (Fc7), and the eighth intermediate vertical frame (Fc8) are inclined so as to face obliquely downward.

[0049] As shown in FIGS. 2 and 3, a first frame portion (FM1), a second frame portion (FM2), a third frame portion (FM3), and a fourth frame portion (FM4) are formed in the upper housing portion (42). The first frame portion (FM1) is composed of a fifth horizontal frame (Fa5), a sixth horizontal frame (Fa6), a first intermediate vertical frame (Fc1), and a third intermediate vertical frame (Fc3). The first frame portion (FM1) constitutes a first suction port (I1). The second frame portion (FM2) is composed of a fifth horizontal frame (Fa5), a sixth horizontal frame (Fa6), a fourth intermediate vertical frame (Fc4), and a second intermediate vertical frame (Fc2). The second frame portion (FM2) constitutes a second suction port (I2). The third frame portion (FM3) is composed of an eighth horizontal frame (Fa8), a seventh horizontal frame (Fa7), a fifth intermediate vertical frame (Fc5), and a seventh intermediate vertical frame (Fc7). The third frame portion (FM3) constitutes a third suction port (I3). The fourth frame portion (FM4) is composed of a sixth horizontal frame (Fa6), an eighth horizontal frame (Fa8), an eighth intermediate vertical frame (Fc8), and a sixth intermediate vertical frame (Fc6). The fourth frame portion (FM4) constitutes a fourth suction port (I4). Each of the first frame portion (FM1), the second frame portion (FM2), the third frame portion (FM3), and the fourth frame portion (FM4) constitutes the frame portions (FM1, FM2, FM3, FM4) of the present disclosure. Each frame portion (FM1, FM2, FM3, FM4) inclines outward of the casing (40) as it goes upward. Also, each of the first suction port (I1), the second suction port (I2), the third suction port (I3), and the fourth suction port (I4) constitutes the suction ports (I1, I2, I3, I4) of the present disclosure.

[0050] As shown in FIGS. 1 to 3, a protective net (100) is provided on the casing (40). The protective net (100) is provided on each frame portion (FM1, FM2, FM3, FM4). Details of the protective net (100) will be described later.

[0051] As shown in FIG. 6, the casing (40) has a first reinforcing frame (FR1) and a second reinforcing frame (FR2). These reinforcing frames (FR1, FR2) are located at the connecting portion between the lower housing portion (41) and the upper housing portion (42). These reinforcing frames extend along the left - right direction (the first direction). In other words, these reinforcing frames have the first direction as the longitudinal direction. The first reinforcing frame (FR1) is located on the front side of the casing (40). The first reinforcing frame (FR1) extends from the left end to the right end of the upper housing portion (42). The second reinforcing frame (FR2) is located on the rear side of the casing (40). The second reinforcing frame (FR2) extends from the left end to the right end of the upper housing portion (42).

[0052] As shown in FIGS. 2 to 4, the casing (40) has a top plate (43) that constitutes its upper surface. The top plate (43) is formed in a rectangular plate shape. A plurality of air outlets are formed in the top plate (43). Each air outlet is formed in a circular shape. The plurality of air outlets are arranged side by side in the first direction. In the top plate (43) of this example, a first air outlet (O1), a second air outlet (O2), a third air outlet (O3), and a fourth air outlet (O4) are formed in order from its left end to its right end.

[0053] As shown in FIG. 6, the casing (40) has a bottom plate (44) that constitutes its lower surface. The bottom plate (44) is formed in a rectangular plate shape. The bottom plate (44) constitutes the bottom surface of the machine room (S1).

[0054] An intermediate plate (45) is formed inside the casing (40). The intermediate plate (45) is formed in a rectangular plate shape. The intermediate plate (45) divides the internal space of the casing (40) vertically. The space below the intermediate plate (45) is the machine room (S1), and the space above the intermediate plate (45) is the blower room (S2). The intermediate plate (45) constitutes the bottom surface of the blower room (S2).

[0055] As shown in FIGS. 3 and 4, a partition plate (46) is provided inside the upper housing portion (42). The partition plate (46) constitutes a vertical wall extending in the third direction. The partition plate (46) divides the internal space of the upper housing portion (42) into left and right. The space on the left side of the partition plate (46) is the first blower chamber (S2A) as a blower chamber, and the space on the right side of the partition plate (46) is the second blower chamber (S2B) as a blower chamber. The first blower chamber (S2A) communicates with the first suction port (I1), the third suction port (I3), the first blowout port (O1), and the second blowout port (O2). The second blower chamber (S2B) communicates with the second suction port (I2), the fourth suction port (I4), the third blowout port (O3), and the fourth blowout port (O4).

[0056] (4-2) Configuration of Each Device in Blower Chamber As shown in FIGS. 2 to 4, air heat exchangers (12A, 12B, 12C, 12D) are arranged in the blower chamber (S2). The air heat exchangers (12A, 12B, 12C, 12D) are an example of the heat exchangers (12A, 12B, 12C, 12D) of the present disclosure. Specifically, the first air heat exchanger (12A) and the third air heat exchanger (12C) are arranged in the first blower chamber (S2A), and the second air heat exchanger (12B) and the fourth air heat exchanger (12D) are arranged in the second blower chamber (S2B). The first air heat exchanger (12A) is arranged on the back side of the first suction port (I1), the second air heat exchanger (12B) is arranged on the back side of the second suction port (I2), the third air heat exchanger (12C) is arranged on the back side of the third suction port (I3), and the fourth air heat exchanger (12D) is arranged on the back side of the fourth suction port (I4). Thus, each of the air heat exchangers (12A, 12B, 12C, 12D) is arranged in the frame portions (FM1, FM2, FM3, FM4) corresponding to each of the air heat exchangers (12A, 12B, 12C, 12D). The heat transfer tubes of the air heat exchangers (12A, 12B, 12C, 12D) extend along the first direction. As shown in FIG. 6, the air heat exchangers (12A, 12B, 12C, 12D) are inclined so as to approach the outside in the short side direction of the casing (40) as they go upward.

[0057] As shown in FIG. 2, a first fan (5A), a second fan (5B), a third fan (5C), and a fourth fan (5D) are arranged in the upper space of the blower chamber (S2). The first fan (5A) is arranged below the first air outlet (O1), the second fan (5B) is arranged below the second air outlet (O2), the third fan (5C) is arranged below the third air outlet (O3), and the fourth fan (5D) is arranged below the fourth air outlet (O4). These fans are each composed of a propeller fan.

[0058] (4-3) Configuration of Each Device in the Machine Room As shown in FIG. 7, in the machine room (S1), a first unit (U1), a second unit (U2), a third unit (U3), and a fourth unit (U4) are arranged in order from the left side to the right side.

[0059] The first unit (U1) includes each component device of the first refrigerant circuit (10A) and a first system electrical component box (6A) for controlling each component device. Each component device of the first refrigerant circuit (10A) includes a first compressor (11A), a first accumulator (15A), and a first subcooling heat exchanger (14A). Similarly, the second unit (U2) includes a second compressor (11B), a second accumulator (15B), a second subcooling heat exchanger (14B), and a second system electrical component box (6B), the third unit (U3) includes a third compressor (11C), a third accumulator (15C), a third subcooling heat exchanger (14C), and a third system electrical component box (6C), and the fourth unit (U4) includes a fourth compressor (11D), a fourth accumulator (15D), a fourth subcooling heat exchanger (14D), and a fourth system electrical component box (6D).

[0060] The first compressor (11A), the second compressor (11B), the third compressor (11C), and the fourth compressor (11D) are arranged side by side in the first direction. These compressors (11A, 11B, 11C, 11D) are arranged closer to the front side of the casing (40). The first accumulator (15A), the second accumulator (15B), the third accumulator (15C), and the fourth accumulator (15D) are arranged side by side in the first direction. These accumulators are arranged at the middle part of the casing (40) in the second direction. The first subcooling heat exchanger (14A), the second subcooling heat exchanger (14B), the third subcooling heat exchanger (14C), and the fourth subcooling heat exchanger (14D) are arranged side by side in the first direction. These subcooling heat exchangers are arranged closer to the front side of the casing (40). Each system electrical component box houses an inverter device or the like for adjusting the rotation speed of the corresponding compressor (11A, 11B, 11C, 11D). These system electrical component boxes are arranged side by side in the first direction. These system electrical component boxes are arranged closer to the rear side of the casing (40).

[0061] In the machine room (S1), the first water-heat exchanger (31), the second water-heat exchanger (32), and the pump (33) are arranged. The first water-heat exchanger (31), the second water-heat exchanger (32), and the pump (33) are arranged closer to the other end (right end) in the first direction in the machine room (S1). The first water-heat exchanger (31) is closer to the rear side of the casing (40), and the second water-heat exchanger (32) is closer to the front side of the casing (40). The first water-heat exchanger (31) and the second water-heat exchanger (32) are arranged side by side in the second direction. The pump (33) is arranged on the right side of the first water-heat exchanger (31). The first water-heat exchanger (31) and the pump (33) are arranged side by side in the first direction.

[0062] The heat source unit (1) has an operation-side electrical component box (7) and a pump-side electrical component box (8). The operation-side electrical component box (7) is arranged at one end (the left end) in the first direction in the machine room (S1). The operation-side electrical component box (7) houses a control board and the like for switching the operation of the heat source unit (1). The pump-side electrical component box (8) is arranged at the other end (the right end) in the first direction in the machine room (S1). The pump-side electrical component box (8) is arranged closer to the front side of the casing (40). The pump (33) and the pump-side electrical component box (8) are arranged side by side in the second direction. The pump-side electrical component box (8) houses an inverter device for the pump and the like for adjusting the rotation speed of the pump (33).

[0063] (5) Operating operation The cooling operation of the heat source unit (1) will be described. Hereinafter, an example in which all the refrigerant circuits (10) operate will be described. In the cooling operation, the compressors (11A, 11B, 11C, 11D) and the pump (33) are in an operating state. In the first refrigerant circuit (10A), the refrigerant compressed by the first compressor (11A) condenses in the first air heat exchanger (12A). A part of the condensed refrigerant flows through the first liquid flow path (L1) of the first subcooling heat exchanger (14A). The remaining part of this refrigerant is depressurized by the cooling expansion valve (25) of the injection pipe (22) and then flows through the second liquid flow path (L2). In the first subcooling heat exchanger (14A), the refrigerant in the first liquid flow path (L1) is cooled by the refrigerant in the second liquid flow path (L2). The refrigerant in the second liquid flow path (L2) is sucked into the intermediate pressure part of the first compressor (11A). The refrigerant cooled in the first liquid flow path (L1) passes through the liquid pipe (21) and flows through the first refrigerant flow path (R1) of the first water heat exchanger (31). In the first water heat exchanger (31), the refrigerant in the first refrigerant flow path (R1) absorbs heat from the water in the first water flow path (W1) and evaporates. The refrigerant evaporated in the first water heat exchanger (31) passes through the first accumulator (15A) and then is sucked into the first compressor (11A).

[0064] In the second refrigerant circuit (10B), the third refrigerant circuit (10C), and the fourth refrigerant circuit (10D), the same refrigeration cycle is performed.

[0065] In the water circuit (30), the water conveyed by the pump (33) flows through the first water flow path (W1) of the first water heat exchanger (31). In the first water heat exchanger (31), the water in the first water flow path (W1) is cooled by the refrigerant in the first refrigerant flow path (R1) and the second refrigerant flow path (R2). The water flowing out of the first water heat exchanger (31) flows through the second water flow path (W2) of the second water heat exchanger (32). In the second water heat exchanger (32), the water in the second water flow path (W2) is cooled by the refrigerant in the third refrigerant flow path (R3) and the fourth refrigerant flow path (R4). The water cooled in the above manner is used as a cold heat source for air conditioning.

[0066] (6) Protective net As shown in FIGS. 1 to 3, the heat source unit (1) of the present embodiment includes a protective net (100). The protective net (100) is an example of the protective member (100) of the present disclosure. The protective net (100) protects the air heat exchangers (12A, 12B, 12C, 12D). Specifically, the protective net (100) covers each frame portion (FM1, FM2, FM3, FM4) from the outside to protect the surfaces of the air heat exchangers (12A, 12B, 12C, 12D) exposed to the outside from the suction ports (I1, I2, I3, I4).

[0067] As shown in FIGS. 8 and 9, the protective net (100) is composed of a plurality of thin rod-shaped members made of metal. Specifically, the protective net (100) has a plurality of vertical rod members (110) extending in the vertical direction and a plurality of horizontal rod members (120) extending in the horizontal direction. The plurality of vertical rod members (110) are arranged at equal intervals in the horizontal direction. The plurality of horizontal rod members (120) are arranged at equal intervals in the vertical direction. By the contact of these vertical rod members (110) and horizontal rod members (120) with each other, a protective net (100) having a square mesh is formed.

[0068] The vertical bar member (110) includes a plurality of engaging vertical bar members (111). The engaging vertical bar member (111) is formed longer than other vertical bar members (110). In the present embodiment, four engaging vertical bar members (111) are provided for one protective net (100). The four engaging vertical bar members (111) are respectively arranged at positions that equally divide the protective net (100) into four in the left - right direction. Each engaging vertical bar member (111) has a first engaging portion (130) and a fixing portion (140).

[0069] (6 - 1) First engaging portion As shown in FIGS. 8 and 10, the upper end of the engaging vertical bar member (111) extends above the horizontal bar member (120) arranged at the uppermost end. The first engaging portion (130) is provided at the upper end of the engaging vertical bar member (111). The first engaging portion (130) is a portion that engages with the frame portions (FM1, FM2, FM3, FM4).

[0070] The first engaging portion (130) of the present embodiment is formed in a hook shape. Specifically, the first engaging portion (130) is formed by bending the upper end of the engaging vertical bar member (111) in an inverted U - shape. More specifically, the first engaging portion (130) is formed such that the upper end of the engaging vertical bar member (111) curves toward the frame portions (FM1, FM2, FM3, FM4) in a state where the protective net (100) is arranged facing the frame portions (FM1, FM2, FM3, FM4). Further, the first engaging portion (130) has a resin cover (131) that covers the tip of the engaging vertical bar member (111).

[0071] The first engaging portion (130) engages with the second engaging portion (150) provided on the frame portions (FM1, FM2, FM3, FM4). The second engaging portion (150) is formed on the upper side of the frame portions (FM1, FM2, FM3, FM4). Specifically, the second engaging portion (150) is formed on the sixth horizontal frame (Fa6) and the eighth horizontal frame (Fa8). The second engaging portion (150) is formed in a concave shape. Specifically, the second engaging portion (150) is formed by being notched in a concave shape so that the hook shape of the first engaging portion (130) can be hooked when the frame portions (FM1, FM2, FM3, FM4) are viewed from the front. In other words, the second engaging portion (150) is a concave groove. The depth and width of the concave groove are approximately the same as the thickness of the engaging vertical bar member (111).

[0072] (6-2) Fixing portion As shown in FIG. 9, the fixing portion (140) is located below the first engaging portion (130) in the protective net (100). Specifically, the lower end of the engaging vertical bar member (111) extends below the horizontal bar member (120) arranged at the lowermost end. The fixing portion (140) is provided at the lower end of the engaging vertical bar member (111). The fixing portion (140) is a portion fixed to the frame portions (FM1, FM2, FM3, FM4).

[0073] The fixing part (140) of this embodiment is generally formed in an annular shape. Specifically, the fixing part (140) curves so as to fold back the lower end portion of the engaging vertical rod member (111), and a ring is formed at the lower end of the engaging vertical rod member (111). A fastening member (B) for fastening to the frame parts (FM1, FM2, FM3, FM4) is inserted into this ring. In other words, a fastening member (B) for fastening to the frame parts (FM1, FM2, FM3, FM4) is attached to the fixing part (140). Fastening holes (not shown) through which the fastening member (B) is inserted are formed in the frame parts (FM1, FM2, FM3, FM4). The fastening holes are formed in the fifth horizontal frame (Fa5) and the seventh horizontal frame (Fa7) which are the lower sides of the respective frame parts (FM1, FM2, FM3, FM4). The fastening member (B) is a screw, a bolt, or the like. The size of the ring of the fixing part (140) is approximately the same as the shaft diameter of the shaft part of the fastening member (B). By inserting the fastening member (B) through the annular fixing part (140) and the fastening hole, the lower end of the protection net (100) is fixed to the frame parts (FM1, FM2, FM3, FM4).

[0074] (7) Cover member As shown in FIGS. 1 to 3 and FIG. 8, the heat source unit (1) of this embodiment is provided with a cover member (70) for protecting the casing (40). Specifically, the portions of the casing (40) that protrude the most in the front-rear direction are the sixth horizontal frame (Fa6) and the eighth horizontal frame (Fa8). The cover member (70) protects the sixth horizontal frame (Fa6) and the eighth horizontal frame (Fa8).

[0075] The cover member (70) is provided near the center of the upper sides (the sixth horizontal frame (Fa6) and the eighth horizontal frame (Fa8)) of the respective frame parts (FM1, FM2, FM3, FM4). The cover member (70) is formed so as to extend in the longitudinal direction of the sixth horizontal frame (Fa6) and the eighth horizontal frame (Fa8).

[0076] As shown in FIG. 10, the cross-section orthogonal to the longitudinal direction of the cover member (70) is formed in a convex shape. This convex protruding portion is provided so as to be located behind the protection net (100). It is attached as follows.

[0077] The cover member (70) is provided so as to cover at least two second engaging portions (150) disposed at the center of each frame portion (FM1, FM2, FM3, FM4). A notch portion (70a) is formed at a position where the second engaging portion (150) is formed in the cover member (70) so that the second engaging portion (150) is exposed to the outside.

[0078] (8) Method for attaching and detaching the protection member A method for attaching the protection member (100) will be described. Here, the heat source unit (1) is relatively large. Specifically, the second engaging portions (150) of the sixth horizontal frame (Fa6) and the eighth horizontal frame (Fa8) are at a height position of 1.5 m or more from the floor surface. The second engaging portion (150) may be at a height of 1.8 m or more, or may be at a height of 2.0 m or more. Further, the fastening holes are at a height position of 1 m or less from the floor surface. In other words, the fixing portion (140) is at a height position of 1 m or less from the floor surface in a state where the protection net (100) is attached to the frame portions (FM1, FM2, FM3, FM4).

[0079] An operator in front of the frame portions (FM1, FM2, FM3, FM4) lifts the protection member (100) and engages the first engaging portion (130) with the second engaging portion (150). The hook portion of the first engaging portion (130) is hooked on the second engaging portion (150) from above the second engaging portion (150). Thereby, the upper end of the protection member (100) is connected to the upper side of the frame portions (FM1, FM2, FM3, FM4). In this way, even when the height position of the second engaging portion (150) is relatively high, the upper end of the protection member (100) can be connected to the frame portions (FM1, FM2, FM3, FM4) without using a stepladder or the like.

[0080] Next, the operator inserts the fastening member through the fixing portion (140) and the fastening hole using a tool. As a result, the lower end of the protection member (100) is fixed to the lower sides of the frame portions (FM1, FM2, FM3, FM4). In this way, since the upper and lower ends of the protection member (100) are attached to the frame portions (FM1, FM2, FM3, FM4), the surfaces of the air heat exchangers (12A, 12B, 12C, 12D) arranged along the frame portions (FM1, FM2, FM3, FM4) that are exposed to the outside are protected by the protection member (100).

[0081] When removing the protection member (100) from the casing (40), after removing the fastening member from the fixing portion (140), the protection member (100) can be lifted and the first engaging portion (130) can be disengaged from the second engaging portion (150). Also when removing the protection member (100) in this way, the connection between the first engaging portion (130) and the second engaging portion (150) can be released without using a stepladder or the like.

[0082] (9) Features (9-1) Feature 1 The heat source unit (1) of the present embodiment includes a casing (40), heat exchangers (12A, 12B, 12C, 12D) arranged in frame portions (FM1, FM2, FM3, FM4) that constitute the suction ports (I1, I2, I3, I4) of the casing (40), and a protection member (100) that protects the air heat exchangers (12A, 12B, 12C, 12D) by covering the frame portions (FM1, FM2, FM3, FM4) from the outside. The frame portions (FM1, FM2, FM3, FM4) are inclined outward of the casing (40) as they go upward, and the protection member (100) is provided with a first engaging portion (130) and a fixing portion (140) located below the first engaging portion (130). The first engaging portion (130) engages with a second engaging portion (150) formed in the frame portions (FM1, FM2, FM3, FM4), and the fixing portion (140) is fixed to the frame portions (FM1, FM2, FM3, FM4).

[0083] In this way, the first engaging portion (130) and the second engaging portion (150) can engage with each other without using fastening such as screws or bolts. Therefore, by simply fixing the fixing portion (140) to the frame portions (FM1, FM2, FM3, FM4), the protection member (100) can be relatively easily attached to the casing (40). Also, by simply releasing the fixing of the fixing portion (140) and the frame portions (FM1, FM2, FM3, FM4), the protection member (100) can be removed from the casing (40). As a result, for example, when the first engaging portion (130) is at a relatively high position, an operator can easily attach or remove the protection member (100) to / from the casing (40) without using a stepladder or the like. In addition, since the frame portions (FM1, FM2, FM3, FM4) are inclined, the fixing portion (140) disposed below the first engaging portion (130) can hold the protection member (100) in a posture along the inclined frame portions (FM1, FM2, FM3, FM4).

[0084] (9-2) Feature 2 In the heat source unit (1) of the present embodiment, the first engaging portion (130) is provided at the upper end of the protection member (100), and the second engaging portion (150) is provided on the upper side of the frame portions (FM1, FM2, FM3, FM4). Thereby, the protection member (100) can be easily attached to the frame portions (FM1, FM2, FM3, FM4).

[0085] (9-3) Feature 3 A fastening member (B) fastened to the frame portions (FM1, FM2, FM3, FM4) is attached to the fixing portion (140) of the heat source unit (1) of the present embodiment. The protection member (100) can be easily fixed to the frame portions (FM1, FM2, FM3, FM4) by the fastening member (B).

[0086] (9-4) Feature 4 In the heat source unit (1) of the present embodiment, the first engaging portion (130) is formed in a hook shape, and the second engaging portion (150) is formed in a concave shape. By the combination of the hook and the concave portion, the first engaging portion (130) and the second engaging portion (150) can be engaged relatively easily.

[0087] (9-5) Feature 5 In the heat source unit (1) of the present embodiment, the second engaging portion (150) is at a height position of 1.5 m or more from the floor surface.

[0088] Since the second engaging portion (150) is at a relatively high height position, if the first engaging portion (130) and the second engaging portion (150) are configured to be fixed to each other, it may be necessary to perform the fixing work using a stepladder or the like. However, in the configuration of the present disclosure, since it is only necessary to engage the first engaging portion (130) and the second engaging portion (150) with each other, the protection member (100) can be attached to the frame portions (FM1, FM2, FM3, FM4) relatively easily even without a stepladder or the like.

[0089] (9-6) Feature 6 In the heat source unit of the present embodiment, the fixing portion (140) is at a height position of 1 m or less from the floor surface in a state where the protection net (100) is attached to the frame portions (FM1, FM2, FM3, FM4). Since the fixing portion (140) is at a relatively low height position, the fastening work of the fixing portion (140) can be performed relatively easily by a fastening member such as a bolt or a screw.

[0090] (10) Second Embodiment The second embodiment is a heat source unit group (UG) including a plurality of heat source units (1) of the first embodiment. As shown in FIG. 11, the heat source unit group (UG) includes a plurality of heat source units (1) arranged such that the protection net (100) of one adjacent heat source unit (1) faces the other heat source unit (1).

[0091] Specifically, two adjacent heat source units (1) are arranged such that the frame parts (FM1, FM2, FM3, FM4) face each other. Since the frame parts (FM1, FM2, FM3, FM4) are inclined, the space (S) between two adjacent heat source units (1) is formed in an "inverted V shape" that narrows from bottom to top. Two adjacent heat source units (1) are the narrowest at the height position where the sixth horizontal frame (Fa6) and the eighth horizontal frame (Fa8) face each other, and a distance D is formed between the facing sixth horizontal frame (Fa6) and eighth horizontal frame (Fa8).

[0092] As shown in FIG. 12, the distance D is longer than the width W of the hook part of the first engaging part (130). In other words, the width of the hook part of the first engaging part (130) is shorter than the distance between adjacent heat source units (1). The width W of the hook part of the first engaging part (130) refers to the length between one end and the other end of the hook part in the arrangement direction of the heat source units (1). In other words, the width W refers to the distance between one end and the other end of the hook part in the horizontal direction. In the present embodiment, the width W of the hook part of the first engaging part (130) is the horizontal distance between the front end E1 and the rear end E2.

[0093] Thus, since the frame parts (FM1, FM2, FM3, FM4) are inclined, when two adjacent heat source units (1) are arranged close to each other, the space formed between the two heat source units (1) is formed in an inverted V shape that narrows from bottom to top. That is, the distance between adjacent heat source units (1) is the largest at the lower end of the frame parts (FM1, FM2, FM3, FM4) and the smallest at the upper end of the frame parts (FM1, FM2, FM3, FM4). Therefore, when trying to fix the upper end of the frame parts (FM1, FM2, FM3, FM4) and the upper end of the protective net using tools, it is necessary to perform the work in the narrowest space, so the workability of attaching and detaching the protective net (100) decreases.

[0094] However, according to the present embodiment, since the first engaging portion (130) only needs to be engaged with the second engaging portion (150) without using tools, the upper end of the protective net (100) can be easily connected to the frame portions (FM1, FM2, FM3, FM4) even in a narrow working space. In particular, even when the second engaging portion (150) is at a relatively high height position, the upper end of the protective net (100) can be connected to the frame portions (FM1, FM2, FM3, FM4) only by lifting the protective net (100) so that the first engaging portion (130) is engaged with the second engaging portion (150) without using a stepladder or the like. Further, since the fixing portion (140) located below the first engaging portion (130) is arranged in a relatively wide space, the workability is less likely to deteriorate even when working with tools. Therefore, the fixing portion (140) can be fixed to the frame portions (FM1, FM2, FM3, FM4) using fastening members. In this way, by engaging the upper end of the protective net (100) while fixing the lower end of the protective net (100), the protective net (100) can be stably fixed to the frame portions (FM1, FM2, FM3, FM4).

[0095] Also, since the length of the width of the hook portion is smaller than the distance between two adjacent heat source units at the upper end of the frame portions (FM1, FM2, FM3, FM4), the first engaging portion (130) can be relatively easily brought closer to the second engaging portion (150), and the protective member can be simply attached to the casing. In this way, in the heat source unit group (UG) of the present embodiment, an operator can enter the space between adjacent heat source units (1) and easily perform the attaching / detaching operation of the protective net (100).

[0096] (11) Other embodiments The above embodiments may have the following configurations.

[0097] As shown in FIG. 13, the first engaging portion (130) of the heat source unit (1) of the present embodiment is formed to protrude from the outer edge of the protective net (100) toward the outside of the protective net (100) (the broken line portion in FIG. 13), and the second engaging portion (150) may be formed in a groove shape or a hole shape so as to be inserted into the first engaging portion (130). Thereby, the first engaging portion (130) and the second engaging portion (150) can be engaged relatively easily only by inserting the first engaging portion (130) into the second engaging portion (150).

[0098] The first engaging portion (130) may be formed on the frame portions (FM1, FM2, FM3, FM4), and the second engaging portion (150) may be formed on the protective net (100). That is, the hook-shaped first engaging portion (130) may be formed on the frame portions (FM1, FM2, FM3, FM4), and a recess into which the hook of the first engaging portion (130) is inserted may be formed on the protective net (100).

[0099] The first engaging portion (130) and the second engaging portion (150) may have shapes that can engage with each other. The shapes that can engage with each other are, for example, shapes that can fix the protective member (100) to the frame portions (FM1, FM2, FM3, FM4) without using tools.

[0100] The protective member (100) may have any shape as long as it protects the surface of the heat exchanger exposed to the outside, and is not limited to a net shape.

[0101] Although the embodiments and modification examples have been described above, it will be understood that various changes in form and details are possible without departing from the spirit and scope of the claims. Also, the above embodiments and modification examples may be appropriately combined or replaced as long as the functions of the subject matter of the present disclosure are not impaired. The descriptions such as "first", "second",... described above are used to distinguish the terms to which these descriptions are given, and do not limit the number or order of those terms.

Industrial Applicability

[0102] As described above, the present disclosure is useful for heat source units and groups of heat source units.

Explanation of Signs

[0103] 1 Heat source unit 12A, 12B, 12C, 12D Air heat exchanger (heat exchanger) 40 Casing 100 Protection member (protection net) 130 First engaging portion 140 Fixing portion 150 Second engaging portion B Fastening member D Distance FM1, FM2, FM3, FM4 Frame portion I1, I2, I3, I4 Suction port UG Group of heat source units

Claims

1. A casing (40), a heat exchanger (12A, 12B, 12C, 12D) disposed within a frame portion (FM1, FM2, FM3, FM4) that constitutes an intake port (I1, I2, I3, I4) of the casing (40), and a protective member (100) that protects the heat exchanger (12A, 12B, 12C, 12D) by covering the frame portion (FM1, FM2, FM3, FM4) from the outside, wherein the frame portion (FM1, FM2, FM3, FM4) inclines outwardly from the casing (40) as it extends upward, the protective member (100) is provided with a first engaging portion (130) and a fixing portion (140) located below the first engaging portion (130), the first engaging portion (130) engages with a second engaging portion (150) formed on the frame portion (FM1, FM2, FM3, FM4), and the fixing portion (140) is fixed to the frame portion (FM1, FM2, FM3, FM4) a heat source unit.

2. The first engaging portion (130) is provided at an upper end of the protective member (100), and the second engaging portion (150) is provided on an upper side of the frame portion (FM1, FM2, FM3, FM4) The heat source unit according to claim 1.

3. A fastening member (B) fastened to the frame portion (FM1, FM2, FM3, FM4) is attached to the fixing portion (140) The heat source unit according to claim 1 or 2.

4. The first engaging portion (130) is formed in a hook shape, the second engaging portion (150) is formed in a concave shape The heat source unit according to claim 1 or 2.

5. The first engaging portion (130) is formed to protrude from an outer edge of the protective member (100) toward the outside of the protective member (100), the second engaging portion (150) is formed in a groove shape or a hole shape so as to be inserted into the first engaging portion (130) The heat source unit according to claim 1 or 2.

6. The second engaging portion (150) is at a height position of 1.5 m or more from the floor surface The heat source unit according to claim 1 or 2.

7. The fixing portion (140) is at a height position of 1 m or less from the floor surface in a state where the protective member (100) is attached to the frame portion (FM1, FM2, FM3, FM4) The heat source unit according to claim 1 or 2.

8. Comprising a plurality of the heat source units according to claim 1 or 2, The plurality of the heat source units are arranged adjacent to each other such that the protection member (100) of the heat source unit faces the other heat source units. A group of heat source units.

9. The first engaging portion (130) is formed in a hook shape that catches on the second engaging portion (150). The width of the hook portion of the first engaging portion (130) is shorter than the distance between adjacent heat source units. The group of heat source units according to claim 8.

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