Heat source device

Abstract

This prevents the cylinder from being damaged when the casing falls. [Solution] The heat source device comprises a cylinder (71) that stores flammable refrigerant for filling a refrigerant circuit (11) and has an outlet (71a) at its bottom for discharging the flammable refrigerant, a fan (30) that transports air to exchange heat with an air heat exchanger (13), and a casing (21) having a bottom plate (23) on which a compressor (12), an air heat exchanger (13), and a cylinder (71) are installed. The heat source device includes a partition member (45) that divides the casing (21) into a first chamber (S1) housing an air heat exchanger (13) and a fan (30), and a second chamber (S2) housing a compressor (12) and a cylinder (71). The cylinder (71) is located closer to the first chamber (S1) than the compressor (12).

Description

Technical Field

[0001] This disclosure relates to a heat source device.

Background Art

[0002] Patent Document 1 discloses a heat source device including a compressor connected to a refrigerant circuit. The compressor is installed on the bottom plate inside the casing of the heat source device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors of the present application have created a configuration in which a cylinder is provided inside the casing of the heat source device. The cylinder stores a flammable refrigerant for filling the refrigerant circuit. Thereby, when installing the heat source device, the refrigerant can be filled from the cylinder into the refrigerant circuit, so that it is not necessary to separately prepare the refrigerant for filling. On the other hand, in a configuration using a flammable refrigerant as the refrigerant and providing a cylinder inside the casing, the following specific problems occur.

[0005] During transportation before the heat source device is installed at the site, there is a risk that the casing may fall. Here, a compressor and a cylinder are provided inside the casing. If the compressor collides with the cylinder due to the impact of the casing falling, the cylinder may be damaged and the flammable refrigerant may leak into the air.

[0006] An object of this disclosure is to suppress the cylinder from being damaged when the casing falls.

Means for Solving the Problems

[0007] The first embodiment relates to a heat source device. The heat source device includes a compressor (12) and an air heat exchanger (13) included in a refrigerant circuit (11) that performs a refrigeration cycle, a cylinder (71) that stores flammable refrigerant for filling the refrigerant circuit (11) and has an outlet (71a) at the bottom for discharging the flammable refrigerant, a fan (30) that transports air to exchange heat with the air heat exchanger (13), a casing (21) having a bottom plate (23) on which the compressor (12), air heat exchanger (13), and cylinder (71) are installed, and a partition member (45) that divides the inside of the casing (21) into a first chamber (S1) that houses the air heat exchanger (13) and the fan (30) and a second chamber (S2) that houses the compressor (12) and the cylinder (71). The cylinder (71) is located closer to the first chamber (S1) than the compressor (12).

[0008] In the first embodiment, the cylinder (71) located in the second chamber (S2) is positioned closer to the first chamber (S1) than the compressor (12). Under the condition that the casing (21) falls to the ground from the first chamber (S1) side, the cylinder (71) will be located below the compressor (12). Therefore, there is a possibility that the compressor (12) will collide with the cylinder (71). However, under this condition, the portion of the bottom plate (23) of the casing (21) that is located in the first chamber (S1) will hit the ground before the cylinder (71). When the bottom plate (23) hits the ground, it deforms. As a result, the kinetic energy of the compressor (12) can be absorbed by the deformation of the bottom plate (23), thus reducing the impact when the compressor (12) collides with the cylinder (71).

[0009] In the second embodiment, in the first embodiment, a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the first chamber (S1) when viewed from above of the bottom plate (23).

[0010] In the second embodiment, when the casing (21) falls to the ground from the first chamber (S1) side, with the first straight line (L1) facing the direction of gravity, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer. As a result, the amount of deformation of the bottom plate (23) when it hits the ground can be increased, and the impact when the compressor (12) hits the cylinder (71) can be reduced.

[0011] In the third embodiment, in the first or second embodiment, in a top view of the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the air heat exchanger (13).

[0012] In the third embodiment, when the casing (21) falls to the ground from the first chamber (S1) side with the first straight line facing the direction of gravity, the cylinder (71) collides with the air heat exchanger (13). As a result, the air heat exchanger (13) can cushion the impact when the cylinder (71) hits the ground. Consequently, damage to the cylinder (71) can be suppressed.

[0013] In the fourth embodiment, in any one of the first to third embodiments, a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the partition member (45) in a top view of the bottom plate (23).

[0014] In the fourth embodiment, when the casing (21) falls to the ground from the first chamber (S1) side, with the first straight line (L1) facing the direction of gravity, the cylinder (71) collides with the partition member (45). As a result, the partition member (45) can cushion the impact when the cylinder (71) hits the ground. Consequently, damage to the cylinder (71) can be suppressed.

[0015] In the fifth aspect, in a top view of the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the fan (30).

[0016] In the fifth embodiment, the cylinder (71) collides with the fan (30) when the casing (21) falls to the ground from the first chamber (S1) side, with the first straight line (L1) facing the direction of gravity. As a result, the fan (30) can cushion the impact when the cylinder (71) hits the ground. Consequently, damage to the cylinder (71) can be suppressed.

[0017] The sixth embodiment is one of the first to fifth embodiments in which the base plate (23) has a first side (23c) and a second side (23d) extending along the first chamber (S1) and the second chamber (S2), and a third side (23b) located on the side of the first chamber (S1) and continuous with the first side (23c) and the second side (23d). In a top view of the base plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the third side (23b).

[0018] In the sixth embodiment, when the casing (21) falls to the ground from the first chamber (S1) side with the first straight line (L1) facing the direction of gravity, the third side (23b) furthest from the cylinder (71) collides with the ground (G). This increases the amount of deformation of the bottom plate (23) when it collides with the ground, and reduces the impact when the compressor (12) collides with the cylinder (71).

[0019] In the seventh aspect, as in the sixth aspect, the intersection of the first straight line (L1) and the third side (23b) is located on the opposite side of the center of gravity of the cylinder (71) in a top view, with a center line (M) perpendicular to the third side (23b) in between.

[0020] In the seventh embodiment, when the casing (21) falls to the ground from the first chamber (S1) side, with the first straight line (L1) facing the direction of gravity, the portion of the third side (23b) that contacts the ground is located on the opposite side of the center of gravity of the cylinder (71) with respect to the center line (M). As a result, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer, which increases the amount of deformation of the bottom plate (23) when it collides with the ground.

[0021] In the eighth aspect, in the sixth or seventh aspect, the first position (P1) is defined as the position of the intersection of the first straight line (L1) and the third side (23b) in the top view of the bottom plate (23). The second position (P2) is defined as the midpoint of the third side (23b). The third position (P3) is defined as the positions of the ends (E1, E2) of the third side (23b) in the top view of the bottom plate (23). The distance between the first position (P1) and the third position (P3) is shorter than the distance between the first position (P1) and the second position (P2).

[0022] In the eighth aspect, when the casing (21) falls from the first chamber (S1) side to the ground with the first straight line (L1) facing the direction of gravity, the portion near the ends (E1, E2) of the third side (23b) collides with the ground. Therefore, since the distance of the bottom plate (23) between the ground (G) and the cylinder (71) becomes longer, the amount of deformation of the bottom plate (23) when the bottom plate (23) collides with the ground can be increased.

[0023] In the ninth aspect, in any one of the sixth to eighth aspects, the longitudinal length of the bottom plate (23) in the first chamber (S1) is larger than the longitudinal length of the bottom plate (23) in the second chamber (S2).

[0024] In the ninth aspect, when the casing (21) falls from the first chamber (S1) side to the ground, the distance of the bottom plate (23) between the ground (G) and the cylinder (71) becomes longer. This is because the longitudinal length of the first chamber (S1), in other words, the length in the arrangement direction of the first chamber (S1) and the second chamber (S2) is larger than the longitudinal length of the second chamber (S2). As a result, the amount of deformation of the bottom plate (23) when the bottom plate (23) collides with the ground can be increased.

Brief Description of the Drawings

[0025] [Figure 1] FIG. 1 is a schematic piping system diagram of a refrigerant circuit of a heat source device according to an embodiment. [Figure 2] FIG. 2 is a schematic perspective view of an outdoor unit. [Figure 3] FIG. 3 is a front view of the outdoor unit, showing a state in which the access port on the front side of the machine room is open. [Figure 4] Figure 4 is a schematic plan view showing the interior of the outdoor unit. [Figure 5] Figure 5 is a side view of the inside of the outdoor unit, seen from the right side with the side panel removed. [Figure 6] Figure 6 is a schematic diagram showing the top view of the inside of the outdoor unit, illustrating the positional relationship between the compressor, cylinder, and sides. [Figure 7] Figure 7 is a schematic diagram showing the relative positions of the compressor, cylinder, and sides of the casing of the comparative example heat source device during a drop under the first condition. [Figure 8] Figure 8 is a schematic diagram showing the positional relationship between the compressor, cylinder, and side of the casing of the embodiment during a fall under the first condition. [Figure 9] Figure 9 is a schematic diagram showing the positional relationship between the compressor, cylinder, and side of the casing of the embodiment during a fall under the second condition. [Figure 10] Figure 10 is a diagram corresponding to Figure 6 of the heat source device in Modification Example 1. [Figure 11] Figure 11 is a diagram corresponding to Figure 6 of the heat source device in Modification Example 2. [Figure 12] Figure 12 is a diagram corresponding to Figure 6 of the heat source device in Modification Example 3. [Figure 13] Figure 13 is a diagram corresponding to Figure 6 of the heat source device in Modification 4. [Modes for carrying out the invention]

[0026] The embodiments of this disclosure will be described in detail below with reference to the drawings. However, this disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of ​​this disclosure. Since the drawings are for conceptual illustration of this disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.

[0027] (1) Basic configuration of the heat source system The heat source device (1) of this embodiment constitutes a refrigeration cycle device that performs a refrigeration cycle. The refrigeration cycle device is applied to a hot water supply device. The heat source device (1) heats water and supplies the heated water to the target. The heat source device (1) has an outdoor unit (20) installed outside. The outdoor unit (20) has a casing (21). The entire closed-circuit refrigerant circuit (11) is housed inside the casing (21). The refrigerant circuit (11) is filled with refrigerant. The refrigerant circuit (11) performs a refrigeration cycle.

[0028] The refrigerant in the refrigerant circuit (11) is a flammable refrigerant. Specifically, the refrigerant in this embodiment is propane (R290), a highly flammable natural refrigerant. Natural refrigerants have a zero ozone depletion potential and a low global warming potential, making them environmentally friendly. Propane ignites at temperatures below 500°C.

[0029] The flammable refrigerant may be methane (R50), ethane (R170), butane (R600), or isobutane (R600a). The natural refrigerant may be a corrosive refrigerant, such as ammonia (R717).

[0030] (1-1) Refrigerant circuit As shown in Figure 1, the refrigerant circuit (11) has as its main components a compressor (12), an air heat exchanger (13), an expansion valve (14), a water heat exchanger (15), and a cylinder (71). The refrigerant circuit (11) further has a four-way switching valve (16) and an accumulator (17).

[0031] The compressor (12) compresses the refrigerant. A discharge pipe (18) is connected to the discharge side of the compressor (12), and a suction pipe (19) is connected to the suction side of the compressor (12). The air heat exchanger (13) exchanges heat between the refrigerant and the outside air. The expansion valve (14) reduces the pressure of the refrigerant. The water heat exchanger (15) exchanges heat between the refrigerant in the refrigerant circuit (11) and the water in the water circuit (40). The four-way switching valve (16) switches the direction of circulation of the refrigerant. The four-way switching valve (16) switches between a first state (shown by the solid line in Figure 1) in which the first port (16a) and the third port (16c) are connected and the second port (16b) and the fourth port (16d) are connected, and a second state (shown by the dashed line in Figure 1) in which the first port (16a) and the second port (16b) are connected and the third port (16c) and the fourth port (16d) are connected. The accumulator (17) stores the liquid in the refrigerant that is drawn into the compressor (12).

[0032] The cylinder (71) is connected to the refrigerant circuit (11) via a connecting pipe (72). In this embodiment, the connecting pipe (72) is connected to the suction pipe (19). A control valve (73) is provided on the connecting pipe (72). The cylinder (71) is filled with refrigerant before the heat source device (1) is shipped. After transporting the heat source device (1) to the site, the worker depressurizes the refrigerant circuit (11). Then, when the worker opens the control valve (73), the refrigerant from the cylinder (71) fills the refrigerant circuit (11).

[0033] The refrigerant circuit (11) performs a first refrigeration cycle and a second refrigeration cycle. In Figure 1, the refrigerant flow in the first refrigeration cycle is shown by solid arrows, and the refrigerant flow in the second refrigeration cycle is shown by dashed arrows. In the first refrigeration cycle, the four-way switching valve (16) is in the first state, and the water heat exchanger (15) functions as a heat radiator (condenser) while the air heat exchanger (13) functions as an evaporator. In the second refrigeration cycle, the four-way switching valve (16) is in the second state, and the air heat exchanger (13) functions as a heat radiator (condenser) while the water heat exchanger (15) functions as an evaporator.

[0034] (1-2) Water circuit The water circuit (40) is connected to the water heat exchanger (15). The water circuit (40) includes a first water pipe (41) upstream of the water heat exchanger (15) and a second water pipe (42) downstream of the water heat exchanger (15). A pump (43) is connected to the water circuit (40). The pump (43) transports water in the water circuit (40). The water in the water circuit (40) is supplied to targets such as hot water tanks, air conditioning units, and floor heating units. A gas-liquid separator (44) is connected to the water circuit (40). The gas-liquid separator (44) releases refrigerant that has leaked from the refrigerant circuit (11) into the water circuit (40) via the water heat exchanger (15) into the atmosphere.

[0035] (2) Outdoor unit The configuration of the outdoor unit (20) will be described in detail with reference to Figures 2 to 5. In the following description, terms such as "up," "down," "right," "left," "front," and "back" refer to the directions indicated by the arrows in Figure 2. The outdoor unit (20) has a casing (21), equipment for the refrigerant circuit (11), and equipment for the water circuit (40). In addition to the elements described above, the equipment for the refrigerant circuit (11) includes refrigerant piping, solenoid valves, an internal heat exchanger, a filter, and insulation material for the piping. The outdoor unit (20) has a partition member (45) that separates the casing (21) and a fan (30) that transports outdoor air.

[0036] (2-1) Casing and partition members The casing (21) is installed outdoors. The casing (21) is formed in the shape of a hollow box. More precisely, the casing (21) is formed in the shape of a box with part of the left side and rear side open. The casing (21) is formed in the shape of a rectangular parallelepiped with the first direction (left-right direction) being the longitudinal direction and the second direction (front-back direction) being the short direction. The casing (21) is made of metallic plate material. The casing (21) has a top plate (22), a bottom plate (23), a right plate (24), a left plate (25), a front plate (26), and a rear plate (27). The top plate (22) forms the top surface of the casing (21), the bottom plate (23) forms the bottom surface of the casing (21), the right plate (24) forms the right side of the casing (21), the left plate (25) forms the left side of the casing (21), the front plate (26) forms the front surface of the casing (21), and the rear plate (27) forms the rear surface of the casing (21). The left plate (25) is located towards the front of the casing (21) and is continuous with the front plate (26). The rear plate (27) is located towards the right of the casing (21) and is continuous with the right plate (24).

[0037] A partition member (45) is provided inside the casing (21). The partition member (45) extends from the bottom plate (23) to the top plate (22). When viewed from above, the partition member (45) extends in the front-to-back direction. The partition member (45) divides the inside of the casing (21) into a first chamber, the fan chamber (S1), and a second chamber, the machine chamber (S2). The fan chamber (S1) is formed on the left side of the casing (21), and the machine chamber (S2) is formed on the right side of the casing (21).

[0038] The casing (21) has an intake port (28) and an outlet port (29). The intake port (28) is formed on the casing (21) from the rear surface to the left surface of the fan chamber (S1). The outlet port (29) is formed on the front part of the front plate (26) of the casing (21) that faces the fan chamber (S1). In the fan chamber (S1), a flow path is formed from the intake port (28) to the outlet port (29) through which outside air flows.

[0039] (2-2) Configuration of the fan room The fan chamber (S1) is composed of a roughly rectangular parallelepiped space. The length of the fan chamber (S1) in the first direction is greater than its length in the second direction. The fan chamber (S1) is equipped with an air heat exchanger (13), a fan (30), and a bell mouth (31).

[0040] The air heat exchanger (13) is formed in an L-shape when viewed from above. The air heat exchanger (13) has a first heat exchange section (13a) along the rear surface of the fan chamber (S1) and a second heat exchange section (13b) along the left surface of the fan chamber (S1). The air heat exchanger (13) is a fin-and-tube type heat exchanger. The heat transfer tubes of the air heat exchanger (13) are made up of flat multi-hole tubes, but straight tubes may also be used.

[0041] The fan (30) is a propeller fan having a motor (30a) and an impeller (30b). The motor (30a) is located behind the impeller (30b). The motor (30a) is supported by a support base (32) installed on the base plate (23). The motor (30a) rotates the impeller (30b). The bell mouth (31) is formed in a cylindrical shape around the impeller (30b). The bell mouth (31) is continuous with the air outlet (29).

[0042] In this embodiment, a portion of the air heat exchanger (13) extends into the machine room (S2). The first heat exchange section (13a) is located behind the partition member (45). The first heat exchange section (13a) extends to the right so as to pass through the space behind the rear end of the partition member (45). The right end of the first heat exchange section (13a) is located in the machine room (S2).

[0043] (3) Configuration of the machine room The machine room (S2) is composed of a roughly rectangular parallelepiped space. The length of the machine room (S2) in the first direction is approximately equal to its length in the second direction. The length of the machine room (S2) in the third direction (vertical direction) is greater than its lengths in the first and second directions. The length of the machine room (S2) in the first direction is less than the length of the fan room (S1) in the first direction. The machine room (S2) houses a compressor (12), a water heat exchanger (15), a gas-liquid separator (44), and an accumulator (17). The outdoor unit (20) further includes a vibration isolation mechanism (50), a sound insulation member (60), and a filling unit (70).

[0044] (3-1) Compressor The compressor (12) is positioned towards the front and right side of the machine room (S2). The compressor (12) has a cylindrical compressor casing (12a). The compressor casing (12a) is formed as a vertically elongated hollow cylinder whose height is greater than its outer diameter. The compressor casing (12a) constitutes a sealed pressure vessel. An intake pipe (19) is connected to the top of the compressor (12). A discharge pipe (18) is connected to the body of the compressor (12). The compressor (12) is, for example, a scroll compressor.

[0045] (3-2) Water heat exchanger The water heat exchanger (15) is located towards the right side of the machine room (S2). The water heat exchanger (15) is closer to the right plate (24) than the compressor (12). The water heat exchanger (15) is closer to the rear plate (27) than the compressor (12). The water heat exchanger (15) is a plate-type heat exchanger. The first water piping (41), the second water piping (42), and the refrigerant piping (not shown) are connected to the water heat exchanger (15).

[0046] (3-3) Gas-liquid separation device The gas-liquid separator (44) is positioned above the water heat exchanger (15). The gas-liquid separator (44) is supported from below by the water heat exchanger (15). The gas-liquid separator (44) is provided with a discharge passage for releasing the gaseous refrigerant separated inside it, and a gas vent valve for opening and closing the discharge passage (not shown).

[0047] (3-4) Accumulator The accumulator (17) is connected to the suction pipe (19). The accumulator (17) is positioned towards the rear of the machine room (S2). The accumulator (17) is formed as a vertically elongated hollow cylindrical shape, with its height greater than its outer diameter.

[0048] (3-5) Vibration isolation mechanism The vibration isolation mechanism (50) suppresses vibrations of the compressor (12) and accumulator (17). The vibration isolation mechanism (50) of this embodiment has a support plate (51) that supports the compressor (12) from below, and an elastic support part (52) that is fixed on the bottom plate (23) and supports the support plate (51) from below.

[0049] The compressor (12) is fixed on a support plate (51). The support plate (51) is a roughly triangular plate member when viewed from above. A circular hole is formed in the center of the support plate (51) into which the bottom of the compressor (12) fits.

[0050] The vibration isolation mechanism (50) of this embodiment has three elastic support parts (52). Each elastic support part (52) is positioned near the three tops of the support plate (51). The elastic support parts (52) are positioned between the support plate (51) and the bottom plate (23). The elastic support parts (52) directly support the support plate (51) from below. The elastic support parts (52) are made of rubber or urethane. The vibrations of the compressor (12) are damped by the elastic support parts (52) before they are transmitted to the bottom plate (23).

[0051] In this embodiment, the cylinder (71) of the filling unit (70) is not supported by the support plate (51) but is fixed on the bottom plate (23).

[0052] (3-6) Sound insulation materials The sound-insulating member (60) suppresses the propagation of noise from the operation of the compressor (12) to the outside of the casing (21). The sound-insulating member (60) is formed in the shape of a hollow box with an open bottom. The sound-insulating member (60) has an upper wall (61), a right wall (62), a left wall (63), a front wall (64), and a rear wall (65). The upper wall (61) faces the top plate (22) and constitutes the upper surface of the sound-insulating member (60). The right wall (62) faces the right plate (24) and constitutes the right side of the sound-insulating member (60). The left wall (63) faces the partition member (45) and constitutes the left side of the sound-insulating member (60). The front wall (64) faces the front plate (26) and constitutes the front surface of the sound-insulating member (60). The rear wall (65) faces the rear plate (27) and constitutes the rear surface of the sound insulation member (60). The front wall (64) is configured to be detachably attached to the main body of the sound insulation member (60).

[0053] The sound-insulating member (60) is supported by the bottom plate (23) of the casing (21). The sound-insulating member (60) is made of a non-permeable material. The sound-insulating member (60) is made of, for example, a metal plate or a rubber sheet.

[0054] The sound-insulating member (60) forms an internal space (66) that houses the compressor (12). In this embodiment, equipment such as the compressor (12), accumulator (17), water heat exchanger (15), and filling unit (70) are arranged in the internal space (66).

[0055] The sound-insulating member (60) and the casing (21) are positioned at a predetermined distance from each other. In other words, a gap (67) is formed between the outer surface of the sound-insulating member (60) and the inner surface of the casing (21). This gap (67) prevents noise from the compressor (12) during operation from propagating to the outside of the casing (21).

[0056] (3-7) Filling Unit The filling unit (70) is positioned towards the left and front of the machine room (S2). The filling unit (70) includes a cylinder (71), a connecting pipe (72), a control valve (73), and a protective member (74).

[0057] The cylinder (71) stores flammable refrigerant for filling the refrigerant circuit (11). The cylinder (71) is pre-filled with refrigerant when the heat source device (1) is shipped. Therefore, when the heat source device (1) is stored or transported, the cylinder (71) is filled with refrigerant. After the heat source device (1) is installed on-site, and before the heat source device (1) is put into operation, refrigerant is filled from the cylinder (71) into the refrigerant circuit (11). Therefore, when the heat source device (1) is in use, the cylinder (71) is empty.

[0058] The cylinder (71) is formed in the shape of a vertically elongated hollow cylinder, with its height greater than its outer diameter. The cylinder (71) constitutes a sealed pressure vessel. The rigidity of the cylinder (71) is less than that of the compressor casing (12a). The weight of the cylinder (71) is less than that of the compressor (12).

[0059] As shown in Figures 1 and 3, an outlet (71a) is formed at the bottom of the cylinder (71). More precisely, the outlet (71a) is formed at the bottom of the cylinder (71). Flammable refrigerants have a relatively high density. By placing the outlet (71a) at the bottom of the cylinder (71), the discharge of the refrigerant can be promoted. In addition, when filling the refrigerant circuit (11) with refrigerant, it is possible to suppress the amount of refrigerant remaining in the cylinder (71).

[0060] The connecting pipe (72) is a pipe for injecting the refrigerant from the cylinder (71) into the refrigerant circuit (11). One end of the connecting pipe (72) is connected to the outlet (71a) of the cylinder (71) and communicates with the inside of the cylinder (71). The other end of the connecting pipe (72) is connected to the suction pipe (19). The connecting pipe (72) is located below the cylinder (71).

[0061] The control valve (73) is installed in the connecting pipe (72). The control valve (73) adjusts the opening of the connecting pipe (72). The control valve (73) is an example of an on-off valve that opens and closes the connecting pipe (72). The control valve (73) is located below the cylinder (71).

[0062] The protective member (74) has the function of protecting the connecting pipe (72) and the control valve (73). The protective member (74) further has the function of supporting the cylinder (71) from below. The protective member (74) has a partition wall (74a) surrounding the connecting pipe (72) and the control valve (73). The partition wall (74a) has an opening (74b) that exposes the control valve (73) located inside it to the outside of the partition wall (74a).

[0063] (3-8) Access point As shown in Figures 3 and 4, an access opening (A) is formed on the front side of the casing (21). The front plate (26) is provided with a front panel (26a) that is detachable from the main body. By removing the front panel (26a), the access opening (A) is exposed to the outside of the casing (21). By removing the front wall (64) from the sound insulation member (60), the equipment inside the casing (21) is exposed to the outside of the casing (21). The compressor (12) and cylinder (71) overlap the access opening (A) in the second direction. A worker on the front side of the casing (21) can access the compressor (12) and cylinder (71) through the access opening (A). The worker can perform maintenance on the compressor (12) and operate the control valve (73) through the opening (74b).

[0064] (4) Features relating to the arrangement of the base plate, compressor, and cylinder The compressor (12) and cylinder (71) are installed directly or indirectly on the base plate (23). The arrangement of the base plate (23), compressor (12), and cylinder (71) will be described in detail with reference to Figure 6. Figure 6 is a schematic diagram of the casing's base plate (23) viewed from above. For convenience, some parts are omitted from the illustration in Figure 6.

[0065] (4-1) Base plate construction The base plate (23) is formed in a substantially rectangular shape with the first direction being the longitudinal direction. The base plate (23) has four sides. The four sides consist of a right side (23a) formed on its right side, a left side (23b) formed on its left side, a front side (23c) formed on its front side, and a rear side (23d) formed on its rear side. The front side (23c) constitutes the first side as the long side, and the rear side (23d) constitutes the second side as the long side. The left side (23b) constitutes the third side as the short side, and the right side (23a) constitutes the fourth side as the short side.

[0066] The left side (23b) of the base plate (23) has a first end (E1) and a second end (E2). The first end (E1) is the front end of the left side (23b). The second end (E2) is the rear end of the left side (23b). In this embodiment, the first end (E1) forms a first corner where the left side (23b) and the front side (23c) are continuous. The second end (E2) forms a second corner where the left side (23b) and the rear side (23d) are continuous.

[0067] (4-2) Arrangement As shown in Figure 6, the cylinder (71) is closer to the fan chamber (S1) than the compressor (12). In other words, the distance from the cylinder (71) to the fan chamber (S1) is shorter than the distance from the compressor (12) to the fan chamber (S1). Inside the casing (21), the compressor (12), cylinder (71), and fan chamber (S1) are arranged in order in the first direction. In this embodiment, the compressor (12) and the cylinder (71) overlap each other in the first direction.

[0068] In Figure 6, the first center of gravity (C1) is the center of gravity of the compressor (12) in a top view of the base plate (23). The second center of gravity (C2) is the center of gravity of the cylinder (71) in a top view of the base plate (23). Here, "top view of the base plate (23)" means the view of the base plate (23) from above in the installed state of the heat source device (1). Here, "center of gravity" refers to the center of mass in a top view of the base plate (23), or the center of mass in the horizontal direction. "Center of gravity" is not the center of mass in the vertical direction. In Figure 6, the first straight line (L1) is a straight line that coincides with the first center of gravity (C1) of the compressor (12) and the second center of gravity (C2) of the cylinder (71) in a top view of the base plate (23). The center line (M) is a straight line perpendicular to the left side (23b) in a top view. Strictly speaking, the center line (M) is a straight line that coincides with the midpoint of the left side (23b) and is perpendicular to the left side (23b). In Figure 6, the first position (P1) is the intersection of the first line (L1) and the left side (23b) in a top view. The second position (P2) is the midpoint of the left side (23b) in a top view. The third position (P3) is the end of the left side (23b). Strictly speaking, the third position (P3) is the end of the left side that is closer to the first position (P1). In this example, the third position (P3) is the first end (E1) of the left side (23b).

[0069] The first straight line (L1) coincides with the fan chamber (S1) when viewed from above the base plate (23). When viewed in the direction in which the first straight line (L1) extends, the compressor (12), the cylinder (71), and the fan chamber (S1) coincide.

[0070] The first straight line (L1) coincides with the partition member (45) when viewed from above the base plate (23). When viewed in the direction in which the first straight line (L1) extends, the compressor (12), the cylinder (71), and the partition member (45) coincide.

[0071] The first straight line (L1) coincides with the fan (30) when viewed from above the base plate (23). When viewed in the direction in which the first straight line (L1) extends, the compressor (12), the cylinder (71), and the fan (30) coincide.

[0072] The first straight line (L1) coincides with the left side (23b), which is the third side, when viewed from above the base plate (23). When viewed in the direction in which the first straight line (L1) extends, the compressor (12), the cylinder (71), and the left side (23b) coincide.

[0073] The first position (P1) is closer to the third position (P3) than to the second position (P2). In other words, the first position (P1) is located closer to the first endpoint (E1) on the left side (23b).

[0074] The first length (a) of the bottom plate (23) in the longitudinal direction (first direction) in the fan room (S1) is greater than the second length (b) of the bottom plate (23) in the longitudinal direction (first direction) in the machine room (S2).

[0075] (4-3) Issues when the casing falls The heat source device (1) houses a cylinder (71) inside a casing (21). The cylinder (71) stores propane, a flammable natural refrigerant. There is a possibility that the casing (21) may fall during transport of the heat source device (1).

[0076] Figure 7 shows a comparative example of a heat source device. In the comparative example, the compressor (12) is closer to the machine room (S2) than the cylinder (71). In this configuration, when the casing (21) falls from the machine room (S2) to the ground (G), the compressor (12) is positioned above the cylinder (71). Therefore, when the casing (21) hits the ground (G), the compressor (12) moves in the direction of gravity and may collide with the cylinder (71), potentially damaging the cylinder (71). In particular, the compressor (12) is more rigid and heavier than the cylinder (71). This contributes to the damage to the cylinder (71).

[0077] (4-4) The action of the casing of this embodiment when it falls In this embodiment, the action of the casing (21) when it falls under the following first and second conditions will be explained.

[0078] As shown in Figure 8(A), the first condition is that the casing (21) falls from the machine room (S2) side to the ground (G). In this embodiment, the cylinder (71) is closer to the fan room (S1) than the compressor (12). Therefore, under the first condition, the cylinder (71) is positioned above the compressor (12). Consequently, as shown in Figure 8(B), even if the casing (21) hits the ground (G) and the compressor (12) moves downward, the compressor (12) is unlikely to hit the cylinder (71). Thus, damage to the cylinder (71) caused by the compressor (12) hitting the cylinder (71) can be suppressed.

[0079] As shown in Figure 9(A), the second condition is that the casing (21) falls to the ground (G) from the fan chamber (S1) side. In the second condition, the cylinder (71) is located below the compressor (12). Therefore, there is a possibility that the compressor (12) will collide with the cylinder (71). However, in this condition, as shown in Figure 9(B), the part of the bottom plate (23) of the casing (21) that is located in the fan chamber (S1) will hit the ground before the cylinder (71). When the bottom plate (23) hits the ground, it deforms. As a result, the kinetic energy of the compressor (12) can be absorbed by the deformation of the bottom plate (23), thus reducing the impact when the compressor (12) collides with the cylinder (71).

[0080] (5) Effects of the embodiment (5-1) In this embodiment, the cylinder (71) is located closer to the fan chamber (S1) than the compressor (12). In the second condition, when the casing (21) falls to the ground from the fan chamber (S1) side, the cylinder (71) will be located below the compressor (12). Therefore, there is a possibility that the compressor (12) will collide with the cylinder (71). However, in this condition, the portion of the bottom plate (23) of the casing (21) that is located in the fan chamber (S1) will hit the ground before the cylinder (71). When the bottom plate (23) hits the ground, it deforms. As a result, the kinetic energy of the compressor (12) can be absorbed by the deformation of the bottom plate (23), thus reducing the impact when the compressor (12) collides with the cylinder (71). Therefore, damage to the cylinder (71) can be suppressed in the second condition.

[0081] In the first condition, where the casing (21) falls to the ground from the machine room (S2) side, the cylinder (71) will be positioned above the compressor (12). Therefore, when the compressor (12) moves downward due to the impact of the casing (21), it is possible to prevent the compressor (12) from colliding with the cylinder (71). Thus, in the first condition, it is possible to prevent the cylinder (71) from being damaged.

[0082] (5-2) The first straight line (L1) coincides with the first chamber (S1) in a top view. Therefore, as shown in Figure 9, in the second condition, especially when the casing (21) falls with the first straight line (L1) aligned with the direction of gravity, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer. As a result, the amount of deformation of the bottom plate (23) when it collides with the ground can be increased, and the impact when the compressor (12) collides with the cylinder (71) can be reduced. In this way, when the first straight line (L1) coincides with the direction of gravity, the collision load acting from the compressor (12) to the cylinder (71) becomes large, but this collision load can be mitigated by the deformation of the bottom plate (23).

[0083] (5-3) The first straight line (L1) coincides with the partition member (45) in a top view. Therefore, under the second condition, especially when the casing (21) falls with the first straight line (L1) aligned with the direction of gravity, the cylinder (71) collides with the partition member (45). As a result, the partition member (45) can cushion the impact when the cylinder (71) hits the ground. Consequently, damage to the cylinder (71) can be suppressed.

[0084] (5-4) The first line (L1) coincides with the fan (30) in a top view. Therefore, under the second condition, especially when the casing (21) falls with the first line (L1) aligned with the direction of gravity, the cylinder (71) collides with the fan (30). As a result, the fan (30) can cushion the impact when the cylinder (71) hits the ground. Consequently, damage to the cylinder (71) can be suppressed.

[0085] (5-5) The first straight line (L1) coincides with the left side (23b) in a top view. Therefore, in the second condition, especially when the casing (21) falls with the first straight line (L1) aligned with the direction of gravity, the left side (23b), which is furthest from the cylinder (71), collides with the ground (G) among the sides (23a, 23b, 23c, 23d) of the bottom plate (23). This increases the amount of deformation of the bottom plate (23) when it collides with the ground, and reduces the impact when the compressor (12) collides with the cylinder (71).

[0086] (5-6) The first position (P1) is defined as the intersection point of the first line (L1) and the left side (23b) in the top view. The second position (P2) is defined as the midpoint of the left side (23b). The third position (P3) is defined as the position of the first end (E1) of the left side (23b) in the top view. The first position (P1) is closer to the third position (P3) than to the second position (P2).

[0087] In the second condition, especially when the casing (21) falls with the first straight line (L1) coinciding with the direction of gravity, the portion of the third side (23b) near the first end (E1) collides with the ground. As a result, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer, which increases the amount of deformation of the bottom plate (23) when it collides with the ground.

[0088] (5-7) The first longitudinal length (a) of the bottom plate (23) in the first chamber (S1) is greater than the second longitudinal length (b) of the bottom plate (23) in the second chamber (S2). Therefore, in the second condition, when the casing (21) falls, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer. As a result, the amount of deformation of the bottom plate (23) when it hits the ground can be increased.

[0089] (6) Variant The above embodiment may also be configured in the following modified form. The differences from the above embodiment will be explained below.

[0090] (6-1) Torture 1 In Modification 1 shown in Figure 10, similar to the embodiment, the cylinder (71) is closer to the fan chamber (S1) than the compressor (12). In Modification 1, the compressor (12) is positioned further forward than the cylinder (71).

[0091] In Modification 1, the first straight line (L1) coincides with the air heat exchanger (13) when viewed from above the bottom plate (23). Specifically, the first straight line (L1) coincides with the bend connecting the first heat exchange section (13a) and the second heat exchange section (13b) of the air heat exchanger (13). With this configuration, when the casing (21) falls under the second condition, particularly when the first straight line (L1) coincides with the direction of gravity, the cylinder (71) collides with the air heat exchanger (13). As a result, the air heat exchanger (13) can cushion the impact when the cylinder (71) hits the ground. Consequently, damage to the cylinder (71) can be suppressed.

[0092] In Modification 1, the first position (P1) is closer to the third position (P3) than to the second position (P2). In other words, the distance between the first position (P1) and the third position (P3) is shorter than the distance between the first position (P1) and the second position (P2). Here, the first position (P1) is the position of the intersection of the first line (L1) and the left side (23b) in a top view. The second position (P2) is the midpoint of the left side (23b). The third position (P3) is the position of the second end (E2) of the left side (23b) in a top view. With this configuration, in the second condition, especially when the casing (21) falls with the first line (L1) coinciding with the direction of gravity, the portion of the third side (23b) closer to the second end (E2) will hit the ground. Therefore, the distance of the base plate (23) from the ground (G) to the cylinder (71) becomes longer, which increases the amount of deformation of the base plate (23) when it collides with the ground.

[0093] In modified example 1, the intersection point (first position (P1)) of the first line (L1) and the third side (23b) is located on the opposite side of the second center of gravity (C2) of the cylinder (71) in a top view, with the center line (M) perpendicular to the left side (23b) in between. In other words, the first position (P1) and the second center of gravity (C2) are in a relationship where they straddle the center line (M) in the direction of the left side (23b). With this configuration, in the second condition, especially when the casing (21) falls with the first line (L1) coinciding with the direction of gravity, the distance of the bottom plate (23) from the ground (G) to the cylinder (71) becomes longer. Therefore, the amount of deformation of the bottom plate (23) when it collides with the ground can be increased.

[0094] (6-2) Modification 2 As shown in Figure 11, in the modified example 2, the first straight line (L1) coincides with the rear edge (23d) of the bottom plate (23) in a top view, rather than the left edge (23b). In this case, the first straight line (L1) coincides with the first heat exchange section (13a) of the air heat exchanger (13). In this configuration as well, when the casing (21) falls from the fan chamber (S1) side, the deformation of the bottom plate (23) can absorb the kinetic energy of the compressor (12). In addition, the air heat exchanger (13) functions as a buffer.

[0095] (6-3) Modification example 3 As shown in Figure 12, in the modified example 3, the first straight line (L1) does not overlap with the fan chamber (S1) in a top view of the bottom plate (23). However, the first straight line (L1) overlaps with the portion of the air heat exchanger (13) that protrudes towards the machine chamber (S2) in a top view of the bottom plate (23). In this configuration as well, when the casing (21) falls from the fan chamber (S1) side, the deformation of the bottom plate (23) can absorb the kinetic energy of the compressor (12). In addition, the air heat exchanger (13) functions as a buffer.

[0096] (6-4) Modification 4 As shown in Figure 13, in Modification 4, the end of the partition member (45) is curved when viewed from above the bottom plate (23). Specifically, the partition member (45) has a curved portion (45a) that curves toward the right as it approaches the rear. An enlarged portion (95), which is part of the fan room (S1), is formed on the rear side of the machine room (S2). The cylinder (71) is positioned closer to the fan room (S1) than the compressor (12) when viewed from above the bottom plate (23). In this configuration, when the casing (21) falls from the enlarged portion (95) side, the deformation of the bottom plate (23) in the portion corresponding to the enlarged portion (95) can absorb the kinetic energy of the compressor (12).

[0097] (7) Other embodiments The heat source device (1) may constitute a part of the refrigeration cycle device. Specifically, the refrigeration cycle device may be a separate type in which the heat source unit, which is the heat source device (1), and the utilization unit are connected via connecting piping. The refrigeration cycle device may also be an air conditioning system, a transport-type refrigeration system, a stationary-type refrigeration system, etc.

[0098] The first straight line (L1) may pass through the front edge (23c) of the base plate (23) in a top view.

[0099] In this embodiment, a corner is formed at the end of the third side (left side (23b)). However, the arc portion may be continuous with the end of the third side (23b) when viewed from above. In this case, the end of the third side (23b) is defined as the continuity point between the third side (23b) and the arc portion.

[0100] The support plate (51) may be configured to support both the compressor (12) and the cylinder (71) from below. In this case, the compressor (12) and the cylinder (71) are not fixed on the bottom plate (23).

[0101] The vibration isolation mechanism (50) may include a lower support plate that supports the elastic support portion (52) of the embodiment from below, and a lower elastic support portion that is fixed on the bottom plate (23) and supports the lower support plate from below.

[0102] The sound-insulating member (60) may cover only the compressor (12). In other words, the cylinder (71) may be placed outside the sound-insulating member (60). In this case, the sound-insulating member (60) constitutes a buffer between the compressor (12) and the cylinder (71).

[0103] Sound-absorbing material may be provided inside the sound-insulating member (60). The sound-absorbing material is a resin material having open cells, such as urethane. Using sound-absorbing material improves the noise reduction effect. When the casing (21) falls, the sound-absorbing material mitigates the impact when the cylinder (71) hits the ground (G). The sound-absorbing material (90) may be provided on the outside of the sound-insulating member (60) instead of the inside, or it may be provided on both the inside and outside of the sound-insulating member (60).

[0104] A buffer member may be provided between the compressor (12) and the cylinder (71). The buffer member is preferably an element of the refrigerant circuit (11), such as a water heat exchanger (15) or refrigerant piping.

[0105] Although embodiments and modifications 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. Furthermore, elements of the embodiments, modifications, and other embodiments described above may be combined or substituted as appropriate. In addition, the designations "first," "second," "third," etc. in the specification and claims are used to distinguish the phrases to which these designations are given, and do not limit the number or order of such phrases. [Industrial applicability]

[0106] As explained above, this disclosure is useful for heat source devices. [Explanation of Symbols]

[0107] 1 Heat source device 11 Refrigerant Circuit 12 Compressor 13. Air heat exchanger 21 Casing 23 Bottom plate 23b Left side (third side) 23c Front side (first side) 23d Rear edge (second side edge) 30 Fans 45 Partition Member 71 cylinders 71a Outlet E1 1st end E2 2nd end L1 1st straight line M center line P1 1st position P2 2nd position P3 3rd position S1 Fan Room (Room 1) S2 Machine room (2nd room)

Claims

1. A compressor (12) and an air heat exchanger (13) are included in the refrigerant circuit (11) that performs the refrigeration cycle, A cylinder (71) for storing flammable refrigerant to be filled into the refrigerant circuit (11), The aforementioned air heat exchanger (13) and a fan (30) that transports the air to be heat-exchanged, A casing (21) having a bottom plate (23) on which the compressor (12), the air heat exchanger (13), and the cylinder (71) are installed, The casing (21) is provided with a partition member (45) that divides the interior into a first chamber (S1) housing the air heat exchanger (13) and the fan (30), and a second chamber (S2) housing the compressor (12) and the cylinder (71). The cylinder (71) is located closer to the first chamber (S1) than the compressor (12). Heat source device.

2. In a top view of the bottom plate (23), a first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the first chamber (S1). The heat source device according to claim 1.

3. In a top view of the bottom plate (23), the first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the air heat exchanger (13). The heat source device according to claim 1.

4. In a top view of the bottom plate (23), the first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the partition member (45). The heat source device according to claim 1.

5. In a top view of the base plate (23), a straight line passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the fan (30). The heat source device according to claim 1.

6. The aforementioned bottom plate (23) is The first side (23c) and the second side (23d) extend along the first chamber (S1) and the second chamber (S2), Located on the side of the first chamber (S1), it has a third side (23b) that is continuous with the first side (23c) and the second side (23d), In a top view of the bottom plate (23), the first straight line (L1) passing through the center of gravity of the compressor (12) and the center of gravity of the cylinder (71) coincides with the third side (23b). A heat source device according to any one of claims 1 to 5.

7. The intersection of the first straight line (L1) and the third side (23b) is located, in the top view, on the opposite side of the center of gravity of the cylinder (71), with the center line (M) perpendicular to the third side (23b) in between. The heat source device according to claim 6.

8. The first position (P1) is defined as the position of the intersection of the first straight line (L1) and the third side edge (23b) in a top view of the bottom plate (23). The second position (P2) is defined as the midpoint of the third side (23b), The third position (P3) is defined as the position of the ends (E1, E2) of the third side (23b) in a top view of the bottom plate (23). The distance between the first position (P1) and the third position (P3) is shorter than the distance between the first position (P1) and the second position (P2). The heat source device according to claim 6.

9. The longitudinal length of the bottom plate (23) in the first chamber (S1) is greater than the longitudinal length of the bottom plate (23) in the second chamber (S2). The heat source device according to claim 6.

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