Absorption water cooler / heater with cover

Abstract

To provide an absorption water cooler / heater with a cover that suppresses the retention of a fuel inside the cover.SOLUTION: An absorption water cooler / heater 1 with a cover comprises: an absorption water cooler / heater 10 that transfers heat by using the heat of combustion of a fuel F having a specific gravity lighter than that of air to thereby carry out a cycle of a refrigerant that undergoes a phase change and an absorption liquid in which the refrigerant is mixed; and a cover 30 that covers the absorption water cooler / heater 10. The cover 30 is provided with a discharge flow path 34 at an upper part. The discharge flow path 34 is for discharging a gas G containing the fuel F when the fuel F is outside the absorption water cooler / heater 10 and inside the cover 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a covered absorption chiller-heater in which an absorption chiller-heater is covered with a cover. [Background technology]

[0002] For example, as a heat source device that produces cold water for cooling purposes and hot water for heating purposes, there is an absorption water chiller / heater that produces cold water and hot water by burning fuel such as gas or oil and circulating a refrigerant and an absorption liquid. Some absorption water chillers / heaters with a relatively small capacity and those installed outdoors are covered with a cover including a top panel and side panels (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 63-176960 Summary of the Invention [Problem to be solved by the invention]

[0004] The exhaust gas generated after fuel is supplied to the burner of the absorption chiller / heater and burned is discharged outside the cover through the chimney. However, if the fuel leaks before reaching the burner, it may accumulate inside the cover.

[0005] In view of the above-mentioned problems, the present disclosure relates to providing a covered absorption chiller-heater that suppresses fuel from accumulating inside the cover even if fuel leaks before reaching a burner. [Means for solving the problem]

[0006] A covered absorption chiller-heater according to a first aspect of the present disclosure comprises an absorption chiller-heater that utilizes the heat of combustion of a fuel that has a lighter specific gravity than air to transfer heat by cycling a refrigerant that undergoes a phase change and an absorption liquid mixed with the refrigerant, and a cover that covers the absorption chiller-heater, wherein the cover has a discharge flow path provided at an upper portion, and the discharge flow path is a flow path that discharges gas containing the fuel when the fuel is present outside the absorption chiller-heater and inside the cover.

[0007] With this configuration, in the event of fuel leakage, it is possible to discharge the leaked fuel to the outside of the cover, and it is possible to prevent fuel from accumulating inside the cover.

[0008] A covered absorption chiller-heater water machine according to a second aspect of the present disclosure is the covered absorption chiller-heater water machine according to the first aspect of the present disclosure, wherein the cover includes a ceiling panel arranged above the absorption chiller-heater water machine, the ceiling panel is arranged at an incline with respect to the horizontal, and the discharge flow path is provided at an upper part of the ceiling panel arranged at an incline.

[0009] With this configuration, in the event of a fuel leak, the leaked fuel can be more easily collected at the top of the ceiling panel, and the leaked fuel can be efficiently discharged outside the cover.

[0010] Further, a covered absorption chiller-heater water machine according to a third aspect of the present disclosure is the covered absorption chiller-heater water machine according to the first or second aspect of the present disclosure, wherein the discharge flow path includes an upward flow section that guides gas upward, and a downward flow section that guides the gas that has passed through the upward flow section below the horizontal.

[0011] With this configuration, when the covered absorption chiller-heater is installed outdoors, it is possible to prevent rain or dust from entering the inside of the cover through the discharge flow path.

[0012] Furthermore, a covered absorption chiller-heater water machine according to a fourth aspect of the present disclosure is a covered absorption chiller-heater water machine according to the third aspect of the present disclosure, wherein the downward flow section is surrounded by a part of the ceiling panel and a downward flow section forming member provided above the part of the ceiling panel.

[0013] With this configuration, the discharge flow path can be easily formed.

[0014] Furthermore, a covered absorption chiller-heater water machine according to a fifth aspect of the present disclosure is a covered absorption chiller-heater water machine according to any one of the first to fourth aspects of the present disclosure, further comprising a detector provided inside the discharge flow path for detecting the presence of the fuel.

[0015] With this configuration, it is possible to quickly detect fuel leakage.

[0016] Furthermore, a covered absorption chiller-heater machine according to a sixth aspect of the present disclosure is the covered absorption chiller-heater machine according to the fifth aspect of the present disclosure, wherein the absorption chiller-heater machine includes a burner for burning the fuel, a fuel pipe inside the cover for directing the fuel to the burner, and a shut-off valve for shutting off the flow of the fuel inside the fuel pipe, and when the detector detects the presence of the fuel, the shut-off valve is closed.

[0017] With this configuration, when a fuel leak is detected, the supply of fuel to the burner can be stopped.

[0018] A covered absorption chiller-heater water machine according to a seventh aspect of the present disclosure is a covered absorption chiller-heater water machine according to any one of the first to sixth aspects of the present disclosure, further comprising a fan that exhausts gas that has passed through the exhaust flow path outside the cover.

[0019] With this configuration, the gas inside the exhaust flow passage can be forcibly exhausted to the outside of the cover, and in the event of fuel leakage, the leaked fuel can be exhausted to the outside.

[0020] Furthermore, a covered absorption chiller-heater water machine according to an eighth aspect of the present disclosure is a covered absorption chiller-heater water machine according to any one of the first to seventh aspects of the present disclosure, wherein the absorption chiller-heater water machine includes a burner for burning the fuel, a fuel pipe inside the cover for conducting the fuel to the burner, and electrically operated equipment, and is provided with a partition member disposed in a space between the fuel pipe and the equipment.

[0021] With this configuration, if fuel leaks from the fuel pipe, the leaked fuel can be prevented from coming into contact with the equipment.

[0022] A covered absorption chiller-heater water machine according to a ninth aspect of the present disclosure is the covered absorption chiller-heater water machine according to the eighth aspect of the present disclosure, wherein the partition member is disposed at least above the fuel pipe.

[0023] In this configuration, the partition members are primarily disposed above the fuel pipes through which fuel may move, so that the partition members can be disposed efficiently.

[0024] Further, a covered absorption chiller-heater water machine according to a tenth aspect of the present disclosure is the covered absorption chiller-heater water machine according to the eighth or ninth aspect of the present disclosure, wherein the partition member is configured as a shielding member that covers at least a portion of the fuel piping.

[0025] With this configuration, fuel leakage can be suppressed by covering the fuel piping at the connections between the piping and devices.

[0026] Furthermore, a covered absorption chiller-heater according to an eleventh aspect of the present disclosure is a covered absorption chiller-heater according to any one of the first to tenth aspects of the present disclosure, wherein the absorption chiller-heater includes a low-temperature body that accommodates the refrigerant and the absorption liquid that are relatively low temperature among the refrigerant and the absorption liquid that perform the cycle, a high-temperature body that accommodates the refrigerant and the absorption liquid that are relatively high temperature, a burner that combusts the fuel to generate combustion heat for heating the absorption liquid accommodated in the high-temperature body, a fuel pipe that guides the fuel to the burner inside the cover, and electronic equipment including a sensor that detects a predetermined physical quantity in at least one of the low-temperature body and the high-temperature body, and the fuel pipe and the electronic equipment are arranged so as to sandwich at least one of the low-temperature body and the high-temperature body in a planar view.

[0027] With this configuration, at least one of the low temperature body and the high temperature body serves as a partition member, making it possible to prevent the fuel from coming into contact with the electronic devices. Effect of the Invention

[0028] According to the present disclosure, in the event of a fuel leak, it is possible to discharge the leaked fuel to the outside of the cover, and it is possible to prevent the fuel from accumulating inside the cover. [Brief description of the drawings]

[0029] [Figure 1] FIG. 1A is a schematic front view of a covered absorption hot / chilled water machine according to one embodiment, and FIG. 1B is a schematic side view of the covered absorption hot / chilled water machine. [Diagram 2] 1A is a partially enlarged cross-sectional view of the vicinity of a discharge flow path, FIG. 1B is a partially enlarged cross-sectional view of the vicinity of a discharge flow path of another configuration, and FIG. 1C is a partially enlarged cross-sectional view of the vicinity of a discharge flow path of yet another configuration. [Diagram 3] FIG. 11 is a schematic side view of a covered absorption chiller-heater machine according to a modified example of the embodiment. [Figure 4]FIG. 1A is a schematic front view of a covered absorption chiller-heater water machine according to another modified example of an embodiment, FIG. 1B is a schematic side view of the covered absorption chiller-heater water machine, and FIG. 1C is a partial schematic diagram showing a fuel piping to which a shielding member is attached. [Diagram 5] FIG. 11 is a plan view of a covered absorption chiller-heater machine according to still another modified example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, an embodiment will be described with reference to the drawings. In the drawings, the same or similar reference numerals are used to designate the same or corresponding parts, and duplicated explanations will be omitted.

[0031] First, referring to Fig. 1(A) and Fig. 1(B), a covered absorption chiller-heater water machine 1 according to one embodiment will be described. Fig. 1(A) is a schematic front view of the covered absorption chiller-heater water machine 1, and Fig. 1(B) is a schematic side view of the covered absorption chiller-heater water machine 1, both of which show a state in which the frontmost panel has been removed to show the internal structure. The covered absorption chiller-heater water machine 1 generally has a configuration in which an absorption chiller-heater water machine 10 is covered with a cover 30.

[0032] The absorption chiller / heater 10 is a device that transfers heat by circulating a refrigerant that undergoes a phase change using an absorbing liquid inside the machine, thereby performing a cycle between the refrigerant and the absorbing liquid. The absorption chiller / heater 10 performs a cycle between the refrigerant and the absorbing liquid, and when the refrigerant liquid is evaporated around the cold / hot water, the absorption chiller / heater 10 can cool the cold / hot water by removing the latent heat of evaporation when the refrigerant liquid evaporates from the cold / hot water, and when the refrigerant vapor is condensed around the cold / hot water, the absorption chiller / heater 10 can heat the cold / hot water by providing the condensation heat when the refrigerant vapor condenses to the cold / hot water. In this embodiment, the absorption chiller / heater 10 is described as a double-effect absorption chiller / heater. The absorption chiller / heater 10 mainly includes a high-temperature drum 11 having a relatively high operating temperature and a low-temperature drum 18 having a relatively low operating temperature, and also includes auxiliary equipment, piping, etc. (not shown).

[0033] In this embodiment, the high-temperature body 11 is a can body that houses a high-temperature regenerator. The high-temperature regenerator heats the dilute solution received from the low-temperature body 18 by the heat of combustion of the fuel F to generate a concentrated solution. The high-temperature body 11 is provided with a burner 12. The burner 12 is an appliance that burns the fuel F to generate the heat of combustion used in the high-temperature regenerator. A fuel with a specific gravity lighter than air is used as the fuel F, and typically hydrogen, city gas, or the like is used. The burner 12 is connected to a burner fan 13 and a fuel pipe 14. The burner fan 13 is an appliance that supplies the air required for the combustion of the fuel F to the burner 12. The fuel pipe 14 constitutes a flow path that guides the fuel F from outside the cover 30 to the burner 12. In this embodiment, most of the fuel pipe 14 is arranged inside the cover 30, and an end 14f to which the external pipe 99 is connected is provided outside the cover 30. A shutoff valve 15 is provided in the fuel pipe 14, typically near the burner 12. The shutoff valve 15 is a valve that can shut off the flow of the fuel F by blocking the flow path of the fuel F formed inside the fuel pipe 14. The shutoff valve 15 may be provided in the fuel pipe 14 near the portion where the fuel pipe 14 penetrates the cover 30, together with or instead of near the burner 12. The high-temperature body 11 is also provided with a chimney 16 that discharges exhaust gas E generated by burning the fuel F. The chimney 16 is connected to the high-temperature body 11 via a front smoke chamber 17. With this configuration, the exhaust gas E generated by burning the fuel F in the burner 12 passes through the high-temperature body 11 and enters the chimney 16 via the front smoke chamber 17. The chimney 16 extends to the outside of the cover 30.

[0034] The low-temperature body 18 is a can body that houses an evaporator, an absorber, a low-temperature regenerator, and a condenser. In the present embodiment, when cooling cold / hot water, the low-temperature regenerator heats the dilute solution received from the absorber with refrigerant vapor introduced from the high-temperature regenerator in the high-temperature body 11 to generate a concentrated solution. The refrigerant vapor that dissipates heat to the dilute solution in the low-temperature regenerator becomes a refrigerant liquid and flows into the condenser. The condenser also receives the refrigerant vapor released when the dilute solution becomes a concentrated solution in the low-temperature regenerator, and cools the received refrigerant vapor with cooling water to generate a refrigerant liquid. The evaporator cools the cold / hot water by removing the latent heat of evaporation required when the refrigerant liquid received from the condenser evaporates to become a refrigerant vapor. The absorber receives the refrigerant vapor generated in the evaporator and absorbs it with the concentrated solution introduced from the low-temperature regenerator and the concentrated solution introduced from the high-temperature regenerator in the high-temperature body 11. The strong solution in the absorber becomes a weak solution when it absorbs the refrigerant vapor, and this weak solution is supplied to the low temperature regenerator and the high temperature regenerator of the high temperature trunk 11. In this embodiment, the high temperature trunk 11 and the low temperature trunk 18 are arranged adjacent to each other in the horizontal direction. The high temperature trunk 11 having a relatively high operating temperature and the low temperature trunk 18 having a relatively low operating temperature mean that the operating temperature of the high temperature trunk 11 is higher and the operating temperature of the low temperature trunk 18 is lower, compared to the high temperature trunk 11 and the low temperature trunk 18. Not only the temperature, but also the internal pressure during operation of the high temperature trunk 11 is higher than that of the low temperature trunk 18.

[0035] In addition to the above configuration, the absorption chiller / heater 10 typically includes devices such as a solution pump for transporting the absorption liquid, a heat exchanger for exchanging heat between a dilute solution and a concentrated solution, a control valve for adjusting the flow rate of the fluid, a pump inverter, and a detector (sensor) for detecting physical quantities related to temperature, pressure, etc., which are not shown in the figure. The absorption chiller / heater 10 also typically includes a control panel 19 for controlling the devices operated by electricity. The control panel 19 is typically configured to control the start / stop of the solution pump and the opening / closing of the control valve, and to receive values ​​detected by the sensor. The control panel 19 is also configured to control the start / stop of the burner 12 and the burner fan 13, and the opening / closing of the shutoff valve 15. Hereinafter, the detector (sensor) for detecting a predetermined physical quantity related to temperature, pressure, etc., and the control panel 19 may be collectively referred to as "electronic device".

[0036] The cover 30 is a member that covers the absorption chiller-heater machine 10. In this embodiment, the overall appearance of the cover 30 is a roughly rectangular parallelepiped. In this embodiment, the cover 30 has a base 31, side panels 32, and a ceiling panel 33. The base 31 is a part that supports the absorption chiller-heater machine 10, constitutes the lower part of the cover 30, and is disposed so as to extend horizontally. The base 31 is typically made of steel and is integrally formed as a whole. In this embodiment, the base 31 is formed into a rectangular shape when viewed from above.

[0037] The side panels 32 are disposed on each of the four sides of the base 31 in a plan view, and each side panel 32 is disposed so as to extend in the vertical direction. Each side panel 32 has a height greater than the height of the absorption chiller-heater 10 excluding the chimney 16. The four side panels 32 surround the outer periphery of the side of the absorption chiller-heater 10 supported by the base 31. Each side panel 32 may be a combination of a plurality of divided panels, or may be formed as one piece. One or more of the four side panels 32 are provided with a louver 39. The louver 39 is an opening that takes in air from the outside of the cover 30 to the inside. The air taken into the cover 30 through the louver 39 can be used as combustion air in the burner 12. The louver 39 is typically provided in the upper part of the side panel 32, and may be provided in the lower part in addition to the upper part. The louver 39 provided on the upper part of the side panel 32 does not reach the upper end of the side panel 32, and typically the upper end of the louver 39 is located a predetermined distance (for example, approximately 150 mm to 200 mm) below the upper end of the side panel 32.

[0038] The ceiling panel 33 is a portion that closes the opening above the side panel 32, and is disposed above the absorption hot and cold water machine 10 (excluding the chimney 16). In this embodiment, the chimney 16 of the absorption hot and cold water machine 10 extends upward through the ceiling panel 33. The ceiling panel 33 closes the entire opening formed above the side panel 32, except for the portion through which the chimney 16 penetrates. In this embodiment, the ceiling panel 33 is disposed at an incline with respect to the horizontal, as shown in FIG. 1(A). Note that in this embodiment, the ceiling panel 33 is entirely inclined when viewed from the front (see FIG. 1(A)), but a part (e.g., the upper half) may be inclined and the remaining part (e.g., the lower half) may not be inclined. In this embodiment, the ceiling panel 33 is not inclined when viewed from the side (see FIG. 1(B)), but may be inclined when viewed from the side together with or instead of the inclination when viewed from the front. An exhaust flow path 34 is provided at the upper portion of the inclined ceiling panel 33. The exhaust flow passage 34 is a flow passage for discharging the gas G present on the inside of the cover 30 outside the absorption chiller-heater 10. Therefore, the exhaust flow passage 34 is not directly connected to the absorption chiller-heater 10 and has a different purpose from the chimney 16. In this embodiment, the exhaust flow passage 34 is formed inside the exhaust pipe 35. The gas G does not include the exhaust gas E passing through the chimney 16, but may include the leaked fuel F if there is a leak of fuel F from the fuel pipe 14. The upper part of the ceiling panel 33 where the exhaust flow passage 34 is provided means a higher part among the relatively higher and lower parts when the ceiling panel 33 arranged at an angle is viewed as a whole. The upper part of the ceiling panel 33 does not have to be the top of the inclined ceiling panel 33, but may be a position where the gas G can be discharged to an extent that the amount of the gas G retained inside the cover 30 can be kept within an allowable range.

[0039] FIG. 2(A) shows the configuration around the exhaust pipe 35. In this embodiment, the exhaust pipe 35 is provided so as to extend upward and outward relative to the ceiling panel 33, and a lid 36 is disposed above the exhaust pipe 35. A cylindrical short pipe may be used as the exhaust pipe 35. The lid 36 may have a disk-shaped member having a diameter larger than the outer diameter of the exhaust pipe 35 and a side wall attached to the outer periphery of the disk-shaped member, and the side wall may be attached so as to protrude to one side relative to the disk-shaped member. The protruding side of the lid 36 faces the exhaust pipe 35, and the side wall covers a part of the exhaust pipe 35 (the lower end of the side wall is located lower than the upper end of the exhaust pipe 35), but is disposed in a position where all or a part of the end of the exhaust pipe 35 does not contact the disk-shaped member so that gas G can pass between the disk-shaped member and the exhaust pipe 35. With this configuration, the exhaust flow path 34 for the gas G has an interior of the exhaust pipe 35 as an ascending flow section 37 that guides the gas G upward, and a gap between the side wall of the lid 36 and the exhaust pipe 35 as a descending flow section 38 that guides the gas G that has passed through the ascending flow section 37 downward below the horizontal. The ascending flow section 37 and the descending flow section 38 each constitute a part of the exhaust flow path 34.

[0040] 2(B), an extension pipe 135 may be connected to the exhaust pipe 35, and the end opening of the extension pipe 135 may be opened downward. In this case, the exhaust pipe 35 and the extension pipe 135 cooperate to form the exhaust flow path 34, with the inside of the exhaust pipe 35 being the upward flow section 37 and the area near the end of the extension pipe 135 being the downward flow section 38. The greater the horizontal distance between the end opening of the extension pipe 135 and the exhaust pipe 35, the greater the effect of preventing rain, debris, and the like from entering the inside of the cover 30.

[0041] Alternatively, as shown in FIG. 2(C), the inclination of the ceiling panel 33 can be used to form the discharge flow path 34. In the example shown in FIG. 2(C), an opening is formed at the top of the inclined ceiling panel 33, and a cover plate 136 that covers the opening is disposed above the opening at a distance from the ceiling panel 33 to form the discharge flow path 34. The cover plate 136 extends so as to overlap the ceiling panel 33 over a predetermined length even after covering the opening formed in the ceiling panel 33. The predetermined length may be determined in consideration of preventing rain, dust, and the like from entering the inside of the cover 30. The cover plate 136 is typically disposed parallel to the overlapping inclined ceiling panel 33. With this configuration, the portion of the discharge flow path 34 sandwiched between a part of the ceiling panel 33 and the cover plate 136 is inclined downward from the opening formed in the ceiling panel 33 toward the outside. In other words, the portion of the discharge flow path 34 sandwiched between a part of the ceiling panel 33 and the cover plate 136 is a downward flow section 38. 2(C), the space from the opening formed in the ceiling panel 33 to the cover plate 136 above it becomes the upward flow section 37.

[0042] The covered absorption chiller-heater 1 will be described with reference to Figs. 1(A) and 1(B) again, and Figs. 2(A) to 2(C) as appropriate. In this embodiment, a detector 51 (see Figs. 2(A) to 2(C)) for detecting the presence of fuel F is provided inside the discharge flow passage 34. The detector 51 is typically connected to the control panel 19 by a communication line (wired or wireless; the same applies below), and is capable of transmitting the detection of the presence of fuel F to the control panel 19 as a signal. The detector 51 may be configured to be capable of setting or adjusting the sensitivity for detecting the presence of fuel F, and may transmit a signal to the control panel 19 when it detects the presence of fuel F at a concentration that may cause ignition, for example. The control panel 19, which receives a signal from the detector 51 indicating that fuel F has been detected, can take one or more of various actions, such as stopping the operation of the absorption chiller-heater 10, closing the shutoff valve 15, and issuing an alarm either by itself or in a remote central monitoring device. When hydrogen is used as the fuel F, it is preferable to take measures such as using an explosion-proof detector 51 so that the fuel F is not ignited by static electricity or the like generated around the detector 51.

[0043] In the covered absorption chiller / heater 1 configured as described above, when the absorption chiller / heater 10 is operated, auxiliary devices such as a solution pump are operated in response to a command from a control panel 19, and the absorption liquid is circulated in the high-temperature body 11 and the low-temperature body 18. In addition, the shutoff valve 15 is opened, and the fuel F is supplied to the burner 12 through the fuel pipe 14, and the burner fan 13 is operated, and the combustion air that has flowed into the cover 30 through the louver 39 is supplied to the burner 12. When the fuel F is burned in the burner 12 to which the fuel F and air are supplied, combustion heat is generated, and the generated combustion heat heats and concentrates the dilute solution in the high-temperature regenerator of the high-temperature body 11, and a cycle of the refrigerant and the absorption liquid is performed inside the high-temperature body 11 and the low-temperature body 18. The cycle of the refrigerant and the absorption liquid is performed to cool or heat the cold or hot water.

[0044] When the covered absorption chiller-heater 1 is operating as described above, or even when the covered absorption chiller-heater 10 is stopped, there is a possibility that the fuel F may leak for some reason. In particular, when hydrogen is used as the fuel F, hydrogen has a smaller molecular weight than city gas, and therefore tends to leak easily. In addition, hydrogen has a wider combustible concentration range than city gas, and its minimum ignition energy is approximately 1 / 10 that of city gas, so it is more likely to ignite than city gas. In addition, hydrogen has a higher combustion reaction rate and a higher energy release rate during combustion than city gas. For these reasons, it is preferable to quickly (without allowing it to accumulate) discharge the hydrogen from the cover 30, especially when hydrogen leaks. The fuel F, whether hydrogen, city gas, or other fuel, supplied to the covered absorption chiller-heater 1 according to this embodiment has a lower specific gravity than air, so it rises when it leaks. In the case of a conventional cover, the leaked fuel F accumulates at the top inside the cover, but in this embodiment, the discharge flow path 34 is provided at the top of the cover 30, so the fuel F can flow out of the cover 30.

[0045] The fuel F leaking inside the cover 30 and rising inside the cover 30 is collected at the upper part inside the cover 30. The fuel F collected at the upper part of the cover 30 flows into the discharge flow passage 34 as gas G together with the surrounding air. In this embodiment, when the gas G passes through the discharge flow passage 34, it changes direction after passing through the ascending flow section 37, passes through the descending flow section 38, and flows out of the cover 30. In addition, in this embodiment, when the concentration of the fuel F in the gas G passing through the discharge flow passage 34 is higher than a predetermined concentration, the detector 51 detects the presence of the fuel F, and the above-mentioned operations such as stopping the absorption chiller-heater 10 and issuing an alarm are performed, so that a quick response can be taken when the fuel F leaks, and the adverse effects associated with the leakage of the fuel F can be reduced. The fuel F in the gas G that flows out of the cover 30 through the discharge flow passage 34 is diffused into the surrounding air and diluted.

[0046] As shown in Fig. 3, an exhaust duct 41 may be connected to the exhaust flow passage 34, and an exhaust fan 43 may be provided in the exhaust duct 41. In particular, when the covered absorption chiller-heater water machine 1 is installed indoors, it is useful to provide the exhaust duct 41. However, even when the covered absorption chiller-heater water machine 1 is installed outdoors, the exhaust duct 41 may be provided. The exhaust fan 43 is typically connected to the control panel 19 by a communication line, and is configured so that starting and stopping are controlled by commands from the control panel 19. For the exhaust fan 43, particularly when hydrogen is used as the fuel F, it is preferable to take measures such as using an explosion-proof fan motor so that the electric part of the fan does not become a source of ignition of the fuel F, or preventing the electric part from coming into contact with the gas G (fuel F) in the exhaust duct 41. By extending the exhaust duct 41 to an arbitrary position where the gas G is to be discharged and operating the exhaust fan 43, the gas G inside the cover 30 can be reliably transported to an arbitrary position at the end of the exhaust duct 41 through the exhaust flow path 34. It is considered that even if the fuel F leaks during the operation of the absorption chiller-heater water machine 10, the leaked fuel F is sucked into the operating burner fan 13 together with the air flowing in from the louver 39, and the leaked fuel F is also combusted in the burner 12. For this reason, the exhaust fan 43 may be stopped during the operation of the absorption chiller-heater water machine 10 and operated when the absorption chiller-heater water machine 10 is stopped. Furthermore, when a detector 51 is provided in the exhaust flow path 34, the exhaust fan 43 may be configured to be operated when the detector 51 detects the presence of the fuel F.

[0047] 4(A) and 4(B), a partition member 61 may be disposed in the space between the equipment (electrically operated equipment) typically disposed adjacent to the high-temperature body 11 or low-temperature body 18 and the fuel pipe 14, so that even if the fuel F leaks from the fuel pipe 14, the leaked fuel F will not come into contact with the equipment. By disposing the partition member 61 to prevent the fuel F from coming into contact with the electrically operated equipment, it is possible to prevent the electric parts of the electrically operated equipment from becoming a source of ignition of the fuel F. The partition member 61 may be, for example, a plate-shaped member formed of synthetic resin or metal that is deformed according to the arrangement of the electrically operated equipment and the fuel pipe 14. The partition member 61 may be disposed in a part of the space between the electrically operated equipment and the fuel pipe 14 where the fuel F may come into contact with the equipment if the fuel F leaks (for example, the connection part of the fuel pipe 14 (including joints such as elbows and sockets as well as the connection part with the equipment) and the position where the equipment is arranged), and does not have to be disposed in the entire space. Since the fuel F supplied to the absorption chiller-heater 10 has a specific gravity lower than that of air, the partition member 61 is preferably disposed above the fuel pipe 14. In this case, the partition member 61 is not limited to being disposed directly above the fuel pipe 14, and may be disposed at a position offset from the fuel pipe 14 in a plan view as long as it is possible to prevent the fuel F leaking from the fuel pipe 14 from coming into contact with the equipment. The partition member 61 does not prevent the partition member 61 from being disposed below the fuel pipe 14, and may be configured as a shielding member 61A that covers a specific part of the fuel pipe 14 (for example, a connection part) as shown in FIG. 4(C). Typically, the shielding member 61A may be provided so as to wrap around a specific portion of the fuel pipe 14.

[0048] Alternatively, as shown in the plan view of FIG. 5 (showing a state in which the ceiling panel 33 (see FIG. 1(A) and the like) is removed), the high-temperature body 11 may be sandwiched between the fuel pipe 14 and the electronic device (including the control panel 19) in a plan view. Note that the low-temperature body 18 may be sandwiched between the fuel pipe 14 and the electronic device instead of the high-temperature body 11, or both the high-temperature body 11 and the low-temperature body 18 may be sandwiched between the fuel pipe 14 and the electronic device. In other words, the fuel pipe 14 and the electronic device may sandwich at least one of the high-temperature body 11 and the low-temperature body 18. As described above, the electronic device is a general term for a detector (sensor) that detects a predetermined physical quantity and the control panel 19. With such an arrangement, at least one of the high-temperature body 11 and the low-temperature body 18 present between the fuel pipe 14 and the electronic device in a plan view can be made to play the role of a partition member, and even if fuel F leaks from the fuel pipe 14, the leaked fuel F can be prevented from coming into contact with the electronic device. The connection points of electronic devices (the connection points between the sensors and the display of the control panel 19 and external wiring, and the inside of the sensors and displays) can become sources of ignition where sparks are generated due to some factor (such as static electricity or accumulation of dust, etc.); however, by preventing leaked fuel F from coming into contact with electronic devices, it is possible to prevent the electronic devices from becoming a source of ignition of the fuel F.

[0049] As described above, according to the covered absorption chiller-heater 1 of this embodiment, since the discharge flow passage 34 is provided on the upper part of the cover 30, even if the fuel F leaks from the fuel pipe 14, the leaked fuel F can be discharged to the outside of the cover 30, and the fuel F can be prevented from accumulating inside the cover 30. Furthermore, since the discharge flow passage 34 includes the ascending flow section 37 and the descending flow section 38, when the covered absorption chiller-heater 1 is installed outdoors, it is possible to prevent rain or dust from entering the inside of the cover 30 through the discharge flow passage 34. Furthermore, since the detector 51 is provided in the discharge flow passage 34, it is possible to quickly grasp the leakage of the fuel F, and when the shutoff valve 15 is interlocked, it is possible to prevent the leakage of the fuel F from expanding, and when the exhaust fan 43 is interlocked, it is possible to quickly discharge the leaked fuel F to the outside of the cover 30. Furthermore, if a partition member 61 or at least one of the high-temperature body 11 and the low-temperature body 18 is placed between the electrically operated equipment or electronic devices and the fuel piping 14, it is possible to prevent leaked fuel F from coming into contact with the equipment or electronic devices, and therefore it is possible to prevent the fuel F from igniting.

[0050] In the above description, the discharge passage 34 is provided in the ceiling panel 33, but it is not limited to the ceiling panel 33 as long as it is provided in the upper part of the cover 30. The upper part of the cover 30 includes, for example, the side panel 32 above the louver 39. However, in order to suppress the accumulation of fuel F in the upper part of the cover 30, it is preferable that the discharge passage 34 is provided in the upper part of the ceiling panel 33.

[0051] In the above explanation, the discharge flow path 34 includes an upward flow section 37 and a downward flow section 38. However, if there are no problems such as the ingress of rain or debris and no problems are caused by not providing the downward flow section 38, then it is possible, for example, to not install the lid body 36 and not to provide the downward flow section 38.

[0052] In the above explanation, the detector 51 is provided inside the discharge flow path 34, but if there is no need to take any action such as stopping the operation of the absorption chiller-heater 10 due to the presence of fuel F inside the discharge flow path 34, the detector 51 does not need to be provided.

[0053] In the above description, the absorption chiller / hot water machine 10 equipped in the covered absorption chiller / hot water machine 1 is a double-effect absorption chiller / hot water machine, but it may be a single-effect absorption chiller / hot water machine or a double or more effect absorption chiller / hot water machine.

[0054] In the above description, the absorption chiller / heater 10 included in the covered absorption chiller / heater 1 is capable of both cooling and heating cold and hot water, but it may be a device that only cools or only heats. In other words, in the present disclosure, the term "absorption chiller / heater" is used for the sake of convenience, and is not required to have the ability to both cool and heat cold and hot water, but is treated as a concept that includes an absorption refrigerator and an absorption heat pump. [Explanation of symbols]

[0055] 1 Covered absorption chiller / heater 10 Absorption chiller / heater 11 High Temperature Torso 12 Burner 13 Burna Fan 14 Fuel piping 15. Shutoff valve 16 Chimney 18 Low Temperature Torso 19 Control Panel 30 Cover 32 Side Panel 33 Ceiling Panel 34 Exhaust flow path 35 Exhaust pipe 36 Lid 37 Upward flow section 38 Downstream section 39 Garari 41 Exhaust Duct 43 Exhaust fan 51 Detector 61 Partition member 61A Shielding material E Exhaust Gas F fuel G Gas

Claims

1. An absorption chiller / heater that uses the heat of combustion of a fuel with a specific gravity lighter than air to transfer heat by cycling between a refrigerant undergoing a phase change and an absorbent liquid mixed with the refrigerant, The unit comprises a cover that covers the aforementioned absorption chiller / heater, The aforementioned cover has a discharge channel at its top, The aforementioned discharge channel is a channel for discharging gas containing the fuel when the fuel is present outside the absorption chiller and inside the cover. The absorption chiller includes a low-temperature cylinder containing a relatively low-temperature refrigerant and absorbent liquid among the refrigerant and absorbent liquid that perform the cycle, a high-temperature cylinder containing a relatively high-temperature refrigerant and absorbent liquid, a burner that burns fuel to generate combustion heat to heat the absorbent liquid contained in the high-temperature cylinder, fuel piping that guides the fuel to the burner inside the cover, and electronic equipment including a sensor that detects a predetermined physical quantity in at least one of the low-temperature cylinder and the high-temperature cylinder. In a plan view, the fuel piping and the electronic equipment are arranged such that they sandwich at least one of the low-temperature cylinder and the high-temperature cylinder. Absorption chiller / heater with cover.

2. The cover includes a ceiling panel positioned above the absorption chiller / heater. The aforementioned ceiling panel is positioned at an angle to the horizontal, The aforementioned discharge channel is provided at the top of the ceiling panel which is arranged at an angle. The absorbent chiller / heater with cover according to claim 1.

3. The discharge channel includes an upward flow section that guides the gas upward, and a downward flow section that guides the gas that has passed through the upward flow section downward below the horizontal. The covered absorption chiller / heater according to claim 2.

4. The downward flow section is formed by being surrounded by a part of the ceiling panel and a downward flow section forming member provided above the part of the ceiling panel. The covered absorption chiller / heater according to claim 3.

5. A detector is provided inside the discharge channel for detecting the presence of the fuel. Absorption chiller / heater with cover according to claim 1 or claim 2.

6. The absorption chiller includes a shut-off valve that blocks the flow of fuel inside the fuel piping. When the detector detects the presence of the fuel, the shut-off valve is closed. The absorbent chiller / heater with cover according to claim 5.

7. The system includes a fan that discharges the gas that has passed through the aforementioned discharge channel to the outside of the cover. Absorption chiller / heater with cover according to claim 1 or claim 2.

8. The aforementioned absorption chiller / heater includes equipment that operates on electricity, The space between the fuel piping and the equipment is provided with a partition member. Absorption chiller / heater with cover according to claim 1 or claim 2.

9. The partition member is positioned at least above the fuel piping. The covered absorption chiller / heater according to claim 8.

10. The partition member is composed of a shielding member that covers at least a portion of the fuel piping. The covered absorption chiller / heater according to claim 8.

11. The fuel comprises hydrogen, The absorbent chiller / heater with cover according to claim 1.

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