Heat source device

Abstract

The purpose is to reduce the impact the cylinder receives from the compressor in the event that the casing falls. [Solution] The heat source device comprises a compressor (12) 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 (711) at its bottom for discharging the flammable refrigerant, a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are installed, and a plate member (81) disposed between the compressor (12) and the cylinder (71).

Description

Technical Field

[0001] The present 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 refrigerant cylinder is provided inside the casing of a heat source device. The refrigerant cylinder stores refrigerant for filling the refrigerant circuit. As a result, when installing the heat source device, refrigerant can be filled into the refrigerant circuit from the refrigerant cylinder, eliminating the need to separately prepare the refrigerant for filling. On the other hand, in a configuration where a refrigerant cylinder is provided inside the casing, the following specific problems occur.

[0005] During transportation before installing the heat source device at the site, there is a risk that the casing may fall. Here, a compressor and a refrigerant cylinder are provided inside the casing. Due to the impact when the casing falls and contacts the ground, the compressor may be displaced toward the refrigerant cylinder side. In this case, if the compressor collides with the refrigerant cylinder, the refrigerant cylinder may be damaged and the refrigerant may leak into the air.

[0006] An object of the present disclosure is to reduce the impact on the cylinder from the compressor when the casing falls.

Means for Solving the Problems

[0007] The first embodiment relates to a heat source device. The heat source device comprises a compressor (12) included in a refrigerant circuit (11) that performs a refrigeration cycle, a cylinder (71) that stores a flammable refrigerant for filling the refrigerant circuit (11) and has an outlet (711) at its bottom for discharging the flammable refrigerant, a casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are installed, and a plate member (81) disposed between the compressor (12) and the cylinder (71).

[0008] In the first embodiment, if the casing (21) falls, even if the compressor (12) is displaced toward the cylinder (71) due to the impact when the casing (21) comes into contact with the ground, the momentum of the compressor (12) toward the cylinder (71) can be reduced by the compressor (12) colliding with the plate member (81) before it reaches the cylinder (71), thereby reducing the impact on the cylinder (71) from the compressor (12).

[0009] In the second embodiment, in the first embodiment, in a top view, the shortest distance (V2) between the compressor (12) and the plate member (81) is smaller than the shortest distance (V1) between the cylinder (71) and the plate member (81).

[0010] In the second embodiment, even if the compressor (12) is displaced toward the cylinder (71), it can be quickly brought into contact with the plate member (81), effectively reducing the momentum of the compressor (12) toward the casing (21).

[0011] In a third embodiment, the heat source device comprises a box member (80) covering the compressor (12), and the plate member (81) is part of the box member (80).

[0012] In the third embodiment, by making the plate member (81) part of the box member (80), even if the compressor (12) collides with the plate member (81), the entire box member (80) can effectively absorb the impact from the plate member (81).

[0013] A fourth aspect is the third aspect, wherein the box member (80) includes a plurality of corners (82) and a flat portion (81b) located between adjacent corners (82), the flat portion (81b) facing the cylinder (71).

[0014] In the fourth embodiment, even if the compressor (12) is displaced toward the cylinder (71), it is possible to prevent the corner (82) of the box member (80) from colliding with the cylinder (71).

[0015] A fifth aspect is that, in the third aspect, the height of the box member (80) from the bottom plate (23) is greater than the height of the cylinder (71) from the bottom plate (23).

[0016] In the fifth embodiment, even if the compressor (12) is displaced toward the cylinder (71) and collides with the box member (80), and the box member (80) is displaced toward the cylinder (71) together with the compressor (12), it is possible to suppress the upper corner (82) of the box member (80) from colliding with the cylinder (71).

[0017] The sixth invention, in the third embodiment, is such that the compressor (12) is installed on a support plate (51) provided on the bottom plate (23), and the box member (80) is installed on the bottom plate (23).

[0018] In the sixth invention, since the compressor (12) and the box member (80) are installed on different components, the compressor (12) and the box member (80) do not vibrate in the same way, so the box member (80) can effectively absorb the shock from the compressor (12).

[0019] In the seventh embodiment, the compressor (12) and the box member (80) are installed on a support plate (51) provided on the bottom plate (23), as in the third embodiment.

[0020] In the seventh embodiment, the compressor (12) and the box member (80) are installed in the same component, thereby making the box member (80) smaller.

[0021] In the eighth aspect, in the third aspect, the heat source device includes a cushioning material installed in the box member (80).

[0022] In the eighth aspect, the box member (80) can effectively absorb the impact from the compressor (12).

[0023] In the ninth aspect, in the third aspect, the box member (80) functions as a sound insulation material.

[0024] In the ninth aspect, the box member (80) can effectively suppress the leakage of the driving sound of the compressor (12) to the outside.

[0025] In the tenth aspect, in the third aspect, the heat source device includes a sound absorption material installed in the box member (80).

[0026] In the tenth aspect, the box member (80) can effectively suppress the leakage of the driving sound of the compressor (12) to the outside.

Brief Description of the Drawings

[0027] [Figure 1] FIG. 1 is a schematic piping system diagram of the refrigerant circuit of the heat source device of the embodiment. [Figure 2] FIG. 2 is a schematic perspective view of the outdoor unit. [Figure 3] FIG. 3 is a front view of the outdoor unit, showing a state where the access opening on the front side of the machine room is open. [Figure 4] FIG. 4 is a plan view schematically showing the inside of the outdoor unit. [Figure 5] FIG. 5 is a side view of the inside of the outdoor unit as seen from the right side with the side plate removed. [Figure 6] FIGS. 6(a) and 6(b) are views showing a modification example of the plate member in a top view. [Figure 7] FIGS. 7(a) and 7(b) are views showing variations in the angle formed between a virtual line connecting the center of the compressor and the center of the cylinder in a top view and the plate surface of the plate member. [Figure 8] Figure 8(a) shows the compressor, cylinder, and plate member inside the casing of the outdoor unit during a fall. Figure 8(b) shows the state in which the compressor is displaced toward the cylinder due to the impact of the fall and collides with the plate member. Figure 8(c) shows the state in which the compressor, whose momentum has been reduced by the collision with the plate member, collides with the cylinder via the plate member. [Figure 9] Figure 9 is a side view showing the positional relationship between the compressor, the cylinder, and the box component. [Figure 10] Figures 10(a) and 10(b) show modified examples of the box member in a top view. [Figure 11] Figures 11(a) and 11(b) show modified examples of the box member in a top view. [Figure 12] Figure 12(a) shows the compressor and cylinder inside the casing of the outdoor unit as it falls. Figure 12(b) shows the state in which the compressor is displaced towards the cylinder due to the impact of the fall and collides with the box member before reaching the cylinder. Figure 8(c) shows the state in which the compressor, whose momentum has been reduced by the collision with the box member, collides with the cylinder via the box member. [Figure 13] Figure 13 shows the state in which the corner of the box component is in contact with the gas cylinder. [Figure 14] Figures 14(a) and 14(b) are side views showing modified configurations of the positional relationship between the compressor, cylinder, and box member. [Modes for carrying out the invention]

[0028] 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 explanation of this disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.

[0029] (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.

[0030] 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.

[0031] 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).

[0032] (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).

[0033] 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).

[0034] 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).

[0035] 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.

[0036] (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.

[0037] (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.

[0038] (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).

[0039] 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).

[0040] The casing (21) has an inlet (28) and an outlet (29). The inlet (28) is formed on the casing (21) from the rear to the left side of the fan chamber (S1). The outlet (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 inlet (28) to the outlet (29) for the outside air to flow. The casing (21) includes a side (21a), and the cylinder (71) is located closer to the side (21a) than the compressor (12).

[0041] (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).

[0042] 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.

[0043] 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).

[0044] 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).

[0045] (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). In this embodiment, the first, second, and third directions are perpendicular to each other, the first and second directions are parallel to the horizontal direction, and the third direction is parallel to the vertical direction. In this embodiment, the first direction is the left-right direction, the second direction is the front-back direction, and the third direction is the up-down direction. In other words, the third direction is the direction in which gravity acts (the direction of gravity).

[0046] (3-1) Compressor The compressor (12) is located towards the front and left 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 casing (12a). A discharge pipe (18) is connected to the compressor casing (12a). The compressor (12) is, for example, a scroll compressor. Inside the compressor casing (12a), there is a compression mechanism (12d) which includes a movable scroll, a fixed scroll, etc., and compresses the refrigerant in a compression chamber formed between the movable scroll and the fixed scroll.

[0047] (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).

[0048] (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).

[0049] (3-4) Accumulator The accumulator (17) is connected to the suction pipe (19). The accumulator (17) is located towards the rear of the machine room (S2). The accumulator (17) is closer to the rear plate (27) than the compressor (12) and the water heat exchanger (15). The accumulator (17) is formed as a vertically elongated hollow cylindrical shape in which its height is greater than its outer diameter.

[0050] (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.

[0051] 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.

[0052] 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).

[0053] 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).

[0054] (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).

[0055] 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.

[0056] 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).

[0057] 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).

[0058] (3-7) Filling Unit The filling unit (70) is positioned towards the right 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).

[0059] 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.

[0060] The cylinder (71) is formed in a vertically elongated, hollow cylindrical shape, with its height greater than its outer diameter. The cylinder (71) constitutes a sealed pressure vessel. The rigidity of the cylinder (71) is lower than that of the compressor casing (12a).

[0061] As shown in Figures 1 and 3, an outlet (711) is formed at the bottom of the cylinder (71). More precisely, the outlet (711) is formed at the bottom of the cylinder (71). Flammable refrigerants have a relatively high density. By placing the outlet (711) 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).

[0062] 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 bottom 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).

[0063] 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).

[0064] 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) is installed between the cylinder (71) and the upper surface (23a) of the bottom plate (23). The upper surface (23a) of the bottom plate (23) refers to the vertical upper surface (23a) of the bottom plate (23). The protective member (74) has a partition wall (74a) surrounding the connecting pipe (72) and the control valve (73), and a support member (74c). 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).

[0065] The support member (74c) is located between the bottom plate (23) of the casing (21) and the bottom surface of the cylinder (71), and is a component that supports the cylinder (71). The lower part of the support member (74c) is fixed to the bottom plate (23). The upper part of the support member (74c) is fixed to the cylinder (71). The support member (74c) may be configured so that its vertical length can be changed, thereby allowing adjustment of the height of the cylinder (71) from the bottom plate (23).

[0066] (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).

[0067] (4) Plate members As shown in Figures 2 to 5, the heat source device (1) includes a plate member (81). The plate member (81) is, for example, a metal member. The plate member (81) has a flat plate shape and is placed between the compressor (12) and the cylinder (71). The plate member (81) includes a first surface (81a) and a second surface (81b), which is the back surface of the first surface (81a). The first surface (81a) faces the compressor (12), and the second surface (81b) faces the cylinder (71). The plate member (81) is installed on a base plate (23) or a support plate (51). The plate member (81) is fixed to the base plate (23) or support plate (51), for example, by screws. The plate member (81) is not limited to having a flat shape when viewed from above (see Figure 8(a)), but may be curved as shown in Figures 6(a) and 6(b). As shown in Figures 7(a) and 7(b), when viewed from above, the angle (θ) between the imaginary line (H) connecting the center (12b) of the compressor (12) and the center (71a) of the cylinder (71) and the plate surface of the plate member (81) may be acute or obtuse. The angle (θ) may also be a right angle (see Figure 8(a)).

[0068] As shown in Figures 8(a) to 8(c), even if the compressor (12) detaches from the bottom plate (23) (or support plate (51)) due to the impact when the casing (21) falls (falls from its side (21a)) and contacts the ground, and the compressor (12) is displaced toward the cylinder (71), the compressor (12) collides with the plate member (81) before reaching the cylinder (71), thus reducing the momentum of the compressor (12) toward the cylinder (71). Therefore, even if the compressor (12) subsequently collides with the cylinder (71) via the plate member (81), the impact received by the cylinder (71) from the compressor (12) can be reduced. The arrow Z in the figures indicates the direction of the fall of the casing (21) when it falls from its side (21a).

[0069] Furthermore, as shown in Figure 4, in a top view (viewed from above in the vertical direction), the shortest distance (V2) between the compressor (12) and the cylinder (71) may be smaller than the shortest distance (V1) between the cylinder (71) and the plate member (81) (V1 > V2). This allows the plate member (81) to deform to absorb the impact from the compressor (12) when it deforms, utilizing the space occupied by the shortest distance (V2), which is larger than the shortest distance (V1), thereby effectively reducing the momentum of the compressor (12) toward the casing (21).

[0070] (5) Variant As shown in Figure 9, the heat source device (1) may include a box member (80). The box member (80) is a box-shaped member installed to cover the compressor (12). The box member (80) is, for example, a metal member. Figures 10(a) to 12(a) show various forms of the box member (80) in a top view. As shown in Figures 10(a) to 12(a), the box member (80) has side plates (84) extending from both ends of a plate member (81) toward the compressor (12), and covers at least a part of the compressor (12). As shown in Figures 9 and 12(a), the box member (80) may have a hollow rectangular prism shape with an open bottom (80a). As shown in Figures 9 and 12(a), the box member (80) is placed on the bottom plate (23) with the opening (80a) at the bottom of the box member (80) abutting against the bottom plate (23), and is fixed to the bottom plate (23) by, for example, screws. The compressor (12) is placed in the space enclosed by the box member (80) and the bottom plate (23). The box member (80) is installed on the bottom plate (23) while covering the compressor (12) which is installed on the support plate (51). The compressor (12) is installed on the support plate (51), and the box member (80) and cylinder (71) are installed on the bottom plate (23). Note that the installation of the compressor (12) includes both direct installation of the compressor (12) and indirect installation of the compressor (12) via a vibration isolation mechanism (50), etc. The installation of the cylinder (71) includes both the direct installation of the cylinder (71) and the indirect installation of the cylinder (71) via a support member (74c) or the like. The box member (80) is installed on the bottom plate (23) while covering the compressor (12) and the support plate (51). The box member (80) includes a plate member (81). The plate member (81) is the part of the box member (80) located between the compressor (12) and the cylinder (71), and is part of the box member (80).

[0071] As shown in Figures 12(a) to 12(c), even if the compressor (12) is displaced toward the cylinder (71) due to the impact when the casing (21) falls (falls from its side (21a)) and contacts the ground, the compressor (12) will collide with the plate member (81) of the box member (80) before reaching the cylinder (71), thereby reducing the momentum of the compressor (12) toward the casing (21). Thus, the impact from the compressor (12) can be effectively absorbed by the box member (80). In addition, the box member (80) can suppress the leakage of the compressor (12)'s operating noise to the outside. Furthermore, it can suppress the refrigerant compressed by the compressor (12) from being ejected from the compressor (12) and adhering to equipment placed around the compressor (12).

[0072] Furthermore, as shown in Figure 12(a), the box member (80) has a hollow rectangular prism shape and includes multiple corners (82), but the flat surfaces (second surface (81b) of the plate member (81)) located between adjacent corners (82) are positioned to face the cylinder (71). As a result, even if the compressor (12) is displaced toward the cylinder (71), the flat surfaces (second surface (81b) of the plate member (81)) will collide with the cylinder (71), thus preventing the corners (82) of the box member (80) from colliding with the cylinder (71), as shown in Figure 13. Consequently, the cylinder (71) can be effectively protected.

[0073] Furthermore, the height of the box member (80) from the bottom plate (23) may be greater than the height of the cylinder (71) from the bottom plate (23). This prevents the compressor (12) from colliding with the box member (80) as it displaces toward the cylinder (71), and even if the box member (80) displaces toward the cylinder (71) together with the compressor (12), the side of the box member (80) will collide with the cylinder (71), thus preventing the upper corner (82) of the box member (80) from colliding with the cylinder (71). As a result, when the box member (80) collides with the cylinder (71), the increase in pressure applied from the box member (80) to the cylinder (71) can be suppressed, thus preventing damage to the cylinder (71).

[0074] Alternatively, as shown in Figure 14(a), the compressor (12) and cylinder (71) may be installed on the support plate (51), and the box member (80) may be installed on the bottom plate (23). In this case, for example, the dimensions of the box member (80) in the second direction (depth direction in Figure 10(a)) are larger than those of the support plate (51), and through holes (83a, 83b) are formed on both sides of the box member (80) facing the first direction (left-right direction in Figure 14(a)), with the support plate (51) passing through the through holes (83a, 83b) in the first direction. As a result, the box member (80) is installed on the bottom plate (23) while covering the compressor (12) installed on the support plate (51).

[0075] Furthermore, as shown in Figure 14(b), the compressor (12), the box member (80), and the box member (80) may be installed on the support plate (51). In this case, the box member (80) is placed on the support plate (51) with the opening (80a) at the bottom of the box member (80) abutting against the support plate (51), and is fixed to the support plate (51), for example, with screws. The compressor (12) is placed in the space enclosed by the box member (80) and the support plate (51). With this configuration, the compressor (12) and the box member (80) covering the compressor (12) are installed on the same member (support plate (51)), so there is no need to enlarge the box member (80) to cover the support plate (51). As a result, the box member (80) can be made smaller. Furthermore, by making the box member (80) smaller, the space between the box member (80) and the cylinder (71) can be increased. When the box member (80) deforms due to an impact from the compressor (12), it can utilize this increased space to deform, thus effectively absorbing the impact from the compressor (12).

[0076] Furthermore, the box member (80) may be provided with a cushioning material. For example, a cushioning material may be provided on the first surface (81a) of the plate member (81) in the box member (80). The cushioning material may be, for example, a resin material having open cells such as urethane. As a result, even if the compressor (12) is displaced toward the cylinder (71), the box member (80) can effectively absorb the impact from the compressor (12) with the cushioning material.

[0077] Furthermore, the box member (80) may also function as a sound-insulating material. By placing the compressor (12) in a closed space surrounded by the box member (80) and the bottom plate (23) or support plate (51), the leakage of the compressor's operating noise from the space to the outside of the box member (80) is suppressed. Additionally, sound-absorbing material may be installed on the inner surface of the box member (80). The sound-absorbing material may be, for example, a resin material with open cells such as urethane.

[0078] 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]

[0079] As explained above, this disclosure is useful for heat source devices. [Explanation of Symbols]

[0080] 1 Heat source device 11 Refrigerant Circuit 12 Compressor 15 Water heat exchanger 21 Casing 23 Bottom plate 71 cylinders 80 Box components 81 Plate members

Claims

1. A compressor (12) is included in the refrigerant circuit (11) that performs the refrigeration cycle, A cylinder (71) that stores flammable refrigerant for filling the refrigerant circuit (11) and has an outlet (711) at its bottom for discharging the flammable refrigerant, A casing (21) having a bottom plate (23) on which the compressor (12) and the cylinder (71) are installed, A plate member (81) is positioned between the compressor (12) and the cylinder (71). A heat source device equipped with the following features.

2. The heat source device according to claim 1, wherein, in a top view, the shortest distance (V2) between the compressor (12) and the plate member (81) is smaller than the shortest distance (V1) between the cylinder (71) and the plate member (81).

3. The heat source device according to claim 1 or claim 2, comprising a box member (80) covering the compressor (12), wherein the plate member (81) is part of the box member (80).

4. The box member (80) includes a plurality of corners (82) and a flat portion (81b) located between adjacent corners (82). The heat source device according to claim 3, wherein the flat portion (81b) faces the cylinder (71).

5. The heat source device according to claim 3, wherein the height of the box member (80) from the bottom plate (23) is greater than the height of the cylinder (71) from the bottom plate (23).

6. The compressor (12) is installed on a support plate (51) provided on the bottom plate (23), The heat source device according to claim 3, wherein the box member (80) is installed on the bottom plate (23).

7. The heat source device according to claim 3, wherein the compressor (12) and the box member (80) are installed on a support plate (51) provided on the bottom plate (23).

8. The heat source device according to claim 3, further comprising a cushioning material installed in the box member (80).

9. The heat source device according to claim 3, wherein the box member (80) functions as a sound insulation material.

10. The heat source device according to claim 3, further comprising sound-absorbing material installed in the box member (80).

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