Heat source device

Abstract

To prevent the compressor from colliding with the cylinder body if it tips over towards the cylinder. [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 height adjustment member (74c) that defines the height of the installation surface of the bottom surface of the cylinder (71) from the bottom plate (23). If the distance between the compressor (12) and the cylinder (71) is D, the height from the bottom plate (23) to the upper corner (12e) of the compressor (12) is H1, and the height of the cylinder (71) from the bottom plate (23) is H2, then H1 × sinθ ≥ H2, θ = tan -1 The relationship (H2 / D) holds true.

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 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 fall toward the refrigerant cylinder side. In this case, if the compressor collides with the body portion of the refrigerant cylinder, which is a brittle part compared to the upper and lower ends of 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 suppress the compressor from colliding with the body portion of the cylinder when the compressor falls toward the cylinder side. [Means for solving the problem]

[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 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 height adjustment member (74c) that defines the height of the installation surface of the bottom surface of the cylinder (71) from the bottom plate (23). If the distance between the compressor (12) and the cylinder (71) is D, the height from the bottom plate (23) to the upper corner (12e) of the compressor (12) is H1, and the height of the cylinder (71) from the bottom plate (23) is H2, then H1 × sinθ ≥ H2, θ = tan -1 The relationship (H2 / D) holds true.

[0008] In the first embodiment, if the compressor (12) falls toward the cylinder (71), the compressor (12) will collide with the upper part (71b) of the cylinder (71), thereby preventing the compressor (12) from colliding with the body portion (71a) of the cylinder (71).

[0009] In the second embodiment, the rigidity of the adjustment member (74c) is lower than that of the cylinder (71) in the first embodiment.

[0010] In the second embodiment, even if the compressor (12) tips over towards the cylinder (71) and collides with the cylinder (71), the adjustment member (74c) deforms easily, thereby absorbing the impact generated by the collision between the compressor (12) and the cylinder (71).

[0011] The third embodiment relates to a heat source device. The heat source device comprises a compressor (12) connected to 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 height adjustment member (74c) that defines the height of the installation surface of the bottom surface of the cylinder (71) from the bottom plate (23), wherein the distance between the compressor (12) and the cylinder (71) is greater than or equal to the height from the bottom plate (23) to the upper end of the compressor (12).

[0012] In the third embodiment, even if the compressor (12) falls toward the cylinder (71), the compressor (12) will not reach the cylinder (71), thereby preventing the compressor (12) from colliding with the body portion (71a) of the cylinder (71). [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 is a schematic piping diagram of the refrigerant circuit of the heat source device according to the embodiment. [Figure 2] Figure 2 is a schematic perspective view of the outdoor unit. [Figure 3] Figure 3 is a front view of the outdoor unit, showing the front access opening of the machine room 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 cross-sectional view of a part of the compressor. [Figure 7] Figures 7(a) and 7(b) are side views showing the positional relationship between the compressor and the cylinder. [Figure 8] Figure 8 is a side view showing the compressor tipping over towards the cylinder and colliding with it. [Figure 9]FIG. 9(a) is a side view showing the positional relationship between the compressor and the cylinder in the modified example. FIG. 9(b) is a side view showing the state where the compressor has fallen toward the cylinder side in the modified example.

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of the present disclosure. Since each drawing is for conceptually explaining the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for easy understanding.

[0015] (1) Basic Configuration of Heat Source Device The heat source device (1) of the present 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 a target. The heat source device (1) has an outdoor unit (20) installed outdoors. The outdoor unit (20) has a casing (21). The entire refrigerant circuit (11), which is a closed circuit, is accommodated inside the casing (21). The refrigerant circuit (11) is filled with a refrigerant. The refrigerant circuit (11) performs a refrigeration cycle.

[0016] The refrigerant in the refrigerant circuit (11) is a flammable refrigerant. Specifically, the refrigerant of the present embodiment is propane (R290), which is a strongly flammable natural refrigerant. Natural refrigerants are refrigerants with a zero ozone depletion coefficient, a low global warming potential, and a small environmental load. Propane ignites at 500°C or lower.

[0017] The flammable refrigerant may be methane (R50), ethane (R170), butane (R600), or isobutane (R600a). The natural refrigerant may be a corrosive refrigerant, for example, ammonia (R717).

[0018] (1-1) Refrigerant Circuit As shown in FIG. 1, the refrigerant circuit (11) has, as 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).

[0019] 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 outdoor 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 circulation direction of the refrigerant. The four-way switching valve (16) switches between a first state (the state shown by the solid line in FIG. 1) in which the first port (16a) and the third port (16c) are communicated with each other and at the same time the second port (16b) and the fourth port (16d) are communicated with each other, and a second state (the state shown by the broken line in FIG. 1) in which the first port (16a) and the second port (16b) are communicated with each other and at the same time the third port (16c) and the fourth port (16d) are communicated with each other. The accumulator (17) stores the liquid in the refrigerant sucked into the compressor (12).

[0020] << The cylinder (71) is connected to the refrigerant circuit (11) via a connection pipe (72). The connection pipe (72) of the present embodiment is connected to the suction pipe (19). A regulating valve (73) is provided in the connection pipe (72). The cylinder (71) is filled with refrigerant before the heat source device (1) is shipped. After the operator transports the heat source device (1) to the site, the refrigerant circuit (11) is depressurized. Then, when the operator opens the regulating valve (73), the refrigerant in the cylinder (71) is filled into the refrigerant circuit (11).

[0021] 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.

[0022] (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.

[0023] (2) Outdoor unit The configuration of the outdoor unit (20) will be described in detail with reference to Figures 2 to 6 and Figure 7(b). In the following description, terms such as "up," "down," "right," "left," "front," and "rear" 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, an internal heat exchanger, a filter, and insulation for the piping. The refrigerant circuit (11) includes an injection circuit that supplies refrigerant to the suction side of the compressor (12) and a solenoid valve that opens and closes the injection circuit. The solenoid valve is positioned higher than the cylinder (71). In this embodiment, the cover of the solenoid valve is rigid and has corners, but by positioning the solenoid valve higher than the cylinder (71), collisions between the cylinder (71) and the solenoid valve cover are suppressed, and damage to the cylinder (71) is suppressed. The outdoor unit (20) includes a partition member (45) that separates the casing (21) and a fan (30) that transports outdoor air.

[0024] (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).

[0025] 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. When viewed from above, the partition member (45) may have a curved or bent shape, or may be formed in a curved shape. 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).

[0026] 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).

[0027] (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).

[0028] 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.

[0029] 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).

[0030] 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).

[0031] (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).

[0032] (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.

[0033] As shown in Figures 6 and 7(b), the compressor casing (12a) includes a body casing (12a1), a first end casing (12a2) fixed (welded) to the upper end of the body casing (12a1), and a second end casing (12a3) fixed (welded) to the lower end of the body casing (12a1). The body casing (12a1) is a cylindrical member with openings at both the upper and lower ends. The first end casing (12a2) is a bowl-shaped member having an opening (12a21) at its lower end. The first end casing (12a2) covers the opening (12a11) at the upper end of the body casing (12a1). The opening (12a11) at the upper end of the body casing (12a1) is inserted into the opening (12a21) at the lower end of the first end casing (12a2). The second end casing (12a3) is a bowl-shaped member having an opening at its upper end. The second end casing covers the opening at the lower end of the body casing (12a1). The opening at the lower end (21b) of the body casing (12a1) is inserted into the opening at the upper end of the second end casing (12a3).

[0034] (3-2) Water heat exchanger As shown in Figures 2 to 5, 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).

[0035] (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).

[0036] (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.

[0037] (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.

[0038] 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.

[0039] 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).

[0040] In this embodiment, the cylinder (71) of the filling unit (70) is not supported by the support plate (51) but is positioned above the bottom plate (23).

[0041] (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).

[0042] 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.

[0043] 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).

[0044] 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).

[0045] (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 (74c3).

[0046] 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.

[0047] 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).

[0048] As shown in Figure 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).

[0049] 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).

[0050] 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).

[0051] The adjustment member (74c) is a component that exists between the bottom plate (23) of the casing (21) and the bottom surface of the cylinder (71) and supports the cylinder (71). The adjustment member (74c) is, for example, a metal component and includes a leg portion (74c1), a top plate portion (74c2), and a protective member (74c3). The leg portion (74c1) extends vertically. The lower end of the leg portion (74c1) is fixed to the bottom plate (23). The top plate portion (74c2) is fixed to the upper end of the leg portion (74c1). The protective member (74c3) is fixed to the upper part of the top plate portion (74c2). The cylinder (71) is installed on the upper part of the top plate portion (74c2) via the protective member (74c3). The protective member (74c3) has the function of supporting the cylinder (71) from below. The protective member (74c3) 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). As shown in Figure 5, in this embodiment, a bracket (80) is fixed to the upper part of the protective member (74c3) by screws (81) or the like, and the lower part of the cylinder (71) is fixed to the bracket (80) by welding or the like. The cylinder (71) is supported by the protective member (74c3) via the bracket (80). The surface of the bracket (80) to which the cylinder (71) is fixed (welded) functions as the mounting surface for the bottom surface of the cylinder (71). When the length of the leg portion (74c1) is changed, the height of the top portion of the top plate portion (74c2) from the bottom plate (23) is changed. For example, the length of the leg portion (74c1) may be changed by replacing an existing leg portion (74c1) with a leg portion (74c1) of a different length in the adjustment member (74c). In this case, the adjustment member (74c) may be configured so that only the leg portion (74c1) is replaced, or the adjustment member (74c) itself may be configured to be replaced. Alternatively, for example, the leg portion (74c1) may include a first rod and a second rod that are slidably connected in the vertical direction, and the length of the leg portion (74c1) may be changed by changing the amount of slide of the second rod relative to the first rod. Furthermore, the height of the mounting surface of the cylinder (71) from the bottom plate (23) may be adjusted by the vertical length of the protective member (74c3), or the height of the mounting surface of the cylinder (71) from the bottom plate (23) may be adjusted by the vertical length of the top plate (74c2).As a result, the adjustment member (74c) functions as a height adjustment member that defines the height of the mounting surface of the bottom of the cylinder (71) from the bottom plate (23).

[0052] The protective member (74c3) further has the function of protecting the connecting pipe (72) and the control valve (73). The protective member (74c3) has a partition wall (74c31) surrounding the connecting pipe (72) and the control valve (73). The partition wall (74c31) has an opening (74c32) that exposes the control valve (73) located inside it to the outside of the partition wall (74c31).

[0053] (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) or operate the control valve (73) through the opening (74c32).

[0054] (4) Characteristics of the arrangement of the compressor and refrigerant cylinders As shown in Figures 3 and 5, the compressor (12) and the cylinder (71) are installed (fixed) to the bottom plate (23) directly or indirectly. In this embodiment, the compressor (12) is installed (fixed) to the bottom plate (23) indirectly via the support plate (51) and the elastic support part (52). Also in this embodiment, the cylinder (71) is installed (fixed) to the bottom plate (23) indirectly via the protective member (74c3). In this embodiment, the compressor (12) and the cylinder (71) are installed directly or indirectly on the upper surface (23a) of the bottom plate (23), and the upper surface (23a) of the bottom plate (23) is a horizontal plane. The bottom plate (23) is the bottom plate (23) of the casing (21) that houses the compressor (12) and the cylinder (71).

[0055] As shown in Figures 7(a) and 7(b), if D is the distance between the compressor (12) and the cylinder (71), H1 is the height from the bottom plate (23) to the upper corner (12e) of the compressor (12), and H2 is the height of the cylinder (71) from the bottom plate (23), then the following relationship 1 holds: The distance between the compressor (12) and the cylinder (71) is the shortest distance between the compressor (12) and the cylinder (71) in a plan view (viewed in the third direction). The upper corner (12e) of the compressor (12) is the welded portion between the first end casing (12a2) and the body casing (12a1) of the compressor casing (12a), and is located, for example, at the lower end of the first end casing (12a2). Furthermore, the upper corner (12e) of the compressor (12) is a welded part and therefore tends to be highly rigid. As a result, if the upper corner (12e) of the compressor (12) collides with the body (71a) of the cylinder (71), the cylinder (71) is likely to be damaged.

[0056] (Math 1) H1 × sinθ ≥ H2 θ = tan -1 (H2 / D)

[0057] (5) Effects As described above, by configuring the system so that equation 1 above is true, as shown in Figure 8, for example, when the casing (21) falls (the casing (21) falls in a position where the compressor (12) is positioned above the cylinder (71)) and makes contact with the ground, the impact causes the compressor (12) to detach from the bottom plate (23) (or support plate (51)), and when the compressor (12) falls toward the cylinder (71), the compressor (12) collides with the upper part (71b) of the cylinder (71). Specifically, when the compressor (12) falls toward the cylinder (71), the upper and lower central part of the compressor (12) (body casing (12a1)) or the upper part of the compressor (12) (first end casing (12a2)) collides with the upper part (71b) of the cylinder (71). The compressor (12) does not collide with the body part (71a) of the cylinder (71). This prevents the compressor (12) from colliding with the body portion (71a) of the cylinder (71), which is a more fragile part of the cylinder (71) compared to its upper and lower ends, even if the compressor (12) falls towards the cylinder (71), thus preventing damage to the cylinder (71). In addition, it prevents the upper corner portion (12e) of the compressor (12), which tends to be more rigid, from colliding with the body portion (71a) of the cylinder (71), thus preventing damage to the cylinder (71). The body portion (71a) of the cylinder (71) is the part located in the upper and lower center of the cylinder (71).

[0058] (6) Variant The above embodiment may also be configured in the following modified form. The differences from the above embodiment will be explained below.

[0059] (6-1) Torture 1 The rigidity of the protective member (74c3) (adjustment member (74c)) may be lower than the rigidity of the cylinder (71). This allows the protective member (74c3) (adjustment member (74c)) to easily deform even if the compressor (12) falls toward the cylinder (71) and collides with the cylinder (71), thereby absorbing the impact generated by the collision between the compressor (12) and the cylinder (71).

[0060] (6-2) Modification 2 As shown in Figure 9(a), the distance D between the compressor (12) and the cylinder (71) may be greater than or equal to the height H3 from the bottom plate (23) to the top of the compressor (12). This prevents the compressor (12) from reaching the cylinder (71) even if it tips over towards the cylinder (71), as shown in Figure 9(b). As a result, even if the compressor (12) tips over towards the cylinder (71), it will not collide with the cylinder (71). Consequently, even if the compressor (12) tips over towards the cylinder (71), it is possible to prevent the compressor (12) from colliding with the body portion (71a) of the cylinder (71), thus preventing damage to the cylinder (71).

[0061] 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]

[0062] As explained above, this disclosure is useful for heat source devices. [Explanation of Symbols]

[0063] 1 Heat source device 11 Refrigerant Circuit 12 Compressor 12e Corner 21 Casing 71 cylinders 74c Height adjustment member (adjustment member) 711 Outlet

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 height adjustment member (74c) that defines the height of the mounting surface of the bottom surface of the cylinder (71) from the bottom plate (23) and Equipped with, A heat source device in which the following relationship holds, where D is the distance between the compressor (12) and the cylinder (71), H1 is the height from the bottom plate (23) to the upper corner (12e) of the compressor (12), and H2 is the height of the cylinder (71) from the bottom plate (23). (Math 1) H1 × sinθ ≥ H2 θ=tan －１ (220)

2. The heat source device according to claim 1, wherein the rigidity of the adjustment member (74c) is lower than the rigidity of the cylinder (71).

3. A compressor (12) connected to a 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 height adjustment member (74c) that defines the height of the mounting surface of the bottom surface of the cylinder (71) from the bottom plate (23) and Equipped with, A heat source device in which the distance between the compressor (12) and the cylinder (71) is greater than or equal to the height from the bottom plate (23) to the upper end of the compressor (12).

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