Freezer and odorous component supply method

Abstract

To provide an art which can supply an odorous component to a refrigerant circuit easily and smoothly and prevent leakage of the odorous component when a device is installed.SOLUTION: A freezer 1 has a refrigerant circuit 10 in which a refrigerant is enclosed and circulated. The refrigerant circuit 10 is provided with a storage structure 50 in which an odorous component OC is stored. The storage structure 50 has a partition wall part 521 which partitions the inside and the outside of the storage structure 50 from each other. The storage structure 50 conducts an opening operation for opening the partition wall part 521 to discharge the odorous component OC to the outside of the storage structure 50. Thus, the freezer 1 may supply the odorous component OC into the refrigerant circuit 10 easily and smoothly and prevent leakage of the odorous component OC when the device is installed.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a refrigeration device and a method for supplying odorous components. [Background technology]

[0002] Conventionally, refrigeration systems have been known in which a highly flammable refrigerant with a low global warming potential (GWP) is sealed in the refrigerant circuit. In this type of refrigeration system, it is important to quickly detect any refrigerant leakage from the refrigerant circuit and prevent the refrigerant from combusting.

[0003] Patent Document 1 discloses a refrigeration cycle device in which, in addition to the refrigerant, an odorous component, a sulfur-based odorant, is sealed in the refrigerant circuit. When the refrigerant leaks from the refrigerant circuit, the odorous component also leaks, allowing people nearby to recognize the abnormality and take the necessary measures. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7162786 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when odorous components are filled into a refrigerant circuit in a manufacturing factory that manufactures refrigeration devices, there is a risk that the working environment in the manufacturing factory will deteriorate if the odorous components leak from the refrigerant circuit into the manufacturing factory.

[0006] The present disclosure provides a technology that allows odorous components to be easily supplied into the refrigerant circuit when the device is installed. [Means for solving the problem]

[0007] A first aspect of the present disclosure is a refrigeration device having a refrigerant circuit that seals in a refrigerant and circulates the refrigerant, wherein the refrigerant circuit is provided with a storage section that stores odorous components, the storage section has a partition section that separates the inside and outside of the storage section, and the storage section releases the odorous components to the outside of the storage section by performing an opening operation to open the partition section.

[0008] According to the above, by providing the refrigeration device with the storage unit that stores the odorous components in the refrigerant circuit, it becomes possible to easily and smoothly supply the odorous components into the refrigerant circuit when the device is installed. That is, the storage unit can supply the odorous components to the refrigerant circuit by releasing the odorous components to the outside of the storage unit based on the opening operation of the partition wall.

[0009] The opening operation is performed by applying pressure or heat to the partition wall.

[0010] This allows the refrigeration device to easily open the partition wall and release the odorous components to the outside of the storage section.

[0011] The opening operation is performed by applying heat or pressure of the refrigerant to the partition wall.

[0012] This allows the refrigeration device to open the partition wall using the refrigerant circulating through the refrigerant circuit, eliminating the need for any other operations on the partition wall, thereby improving work efficiency and preventing the opening operation from being forgotten.

[0013] The refrigerant circuit includes a compressor that compresses the refrigerant, a heat source side heat exchanger, a utilization side heat exchanger, a switching valve having a first port, a second port, and a third port, and piping that connects the compressor and the switching valve, the first port is connected to the compressor via the piping, the second port is connected to the heat source side heat exchanger, and the third port is connected to the utilization side heat exchanger, the switching valve is switchable between a state in which the first port and the second port are connected to each other and a state in which the first port and the third port are connected to each other, and the accommodating unit is provided in the piping.

[0014] This allows the refrigeration device to place the accommodating portion at a location in the refrigerant circuit where the refrigerant is likely to reach the highest pressure and temperature, thereby making it possible to effectively utilize the pressure or heat of the refrigerant.

[0015] The opening operation is performed by applying the pressure to the partition wall from outside the refrigerant circuit.

[0016] Even in this case, for example, an operator can apply pressure from outside the refrigerant circuit to open the partition wall, thereby easily releasing the odorous components into the refrigerant circuit.

[0017] The partition is a container that entirely covers the odorous components.

[0018] This allows the refrigeration device to easily accommodate the holder, in which the odorous component is covered with the container, in the accommodation section.

[0019] The partition wall is a diaphragm that separates the inside and outside of the container.

[0020] Even in this case, the refrigeration device can separate the odorous components from the refrigerant circuit in advance using a diaphragm, and can smoothly release the odorous components by opening the diaphragm.

[0021] The container is provided in a protrusion that protrudes laterally from a pipe of the refrigerant circuit through which the refrigerant flows.

[0022] This allows the refrigeration apparatus to easily release odorous components from the protrusion into the refrigerant circuit. Also, the refrigeration apparatus does not need to have the accommodating portion impede the circulation of the refrigerant in the refrigerant circuit.

[0023] The refrigerant circuit also includes a restricting portion that restricts movement of the partition wall.

[0024] This restricting portion allows the refrigeration apparatus to easily prevent the partition wall from leaking into the refrigerant circuit.

[0025] The refrigerant is a highly flammable refrigerant.

[0026] This allows the refrigeration device to circulate the refrigerant with a low GWP value in the refrigerant circuit together with the odorous components released from the storage unit.

[0027] The refrigerant is a refrigerant containing a hydrocarbon as a main component.

[0028] This allows a refrigerant with a low GWP value to circulate in the refrigerant circuit.

[0029] The odor components include any one of tetrahydrothiophene, dimethyl sulfide, and ethyl methyl sulfide, or one or more of these as components.

[0030] As a result, the odorous components have superior odor quality and odor threshold compared to other sulfide-based components, and because they are chemically stabilized, the composition of the odorous components can be well maintained in the refrigerant circuit.

[0031] A second aspect of the present disclosure is a supply method for supplying odorous components to a refrigeration device having a refrigerant circuit that circulates the refrigerant by sealing in the refrigerant, the method comprising: a providing step of providing the refrigerant circuit having a storage section that has the odorous components stored in advance; and a releasing step of releasing the odorous components to the outside of the storage section by performing an opening operation to open a partition section that separates the inside and outside of the storage section in the storage section.

[0032] Even in this case, the supply method allows the odorous components to be supplied easily and smoothly into the refrigerant circuit when the device is installed. [Brief explanation of the drawings]

[0033] [Figure 1] 1 is a diagram illustrating a schematic configuration of an air conditioning apparatus according to an embodiment. [Figure 2] FIG. 3 is a cross-sectional view showing a housing portion provided in the refrigerant circuit. [Figure 3] 4 is a flowchart showing the steps of a method for supplying odor components to a refrigerant circuit. [Figure 4] Fig. 4(A) is a first cross-sectional view showing a state in which refrigerant pressure or heat is applied to the containing section, and Fig. 4(B) is a second cross-sectional view showing a state in which odorous components are released from the containing section. [Figure 5] FIG. 10 is a cross-sectional view showing a storage section according to a first modified example. [Figure 6] FIG. 10 is a cross-sectional view showing a storage section according to a second modified example. DETAILED DESCRIPTION OF THE INVENTION

[0034] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same components are designated by the same reference numerals, and duplicate explanations may be omitted. In each drawing, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding of the invention.

[0035] <Configuration of refrigeration equipment> As shown in FIG. 1 , a refrigeration device 1 according to an embodiment of the present disclosure is an air conditioner that adjusts the temperature of air in an indoor space. Hereinafter, the refrigeration device 1 will also be referred to as the air conditioner 1. The air conditioner 1 is used for cooling and heating indoor spaces by performing a vapor compression refrigeration cycle operation. In cooling operation, the air conditioner 1 cools the air in the indoor space to adjust the temperature. In heating operation, the air conditioner 1 heats the air in the indoor space to adjust the temperature.

[0036] The air conditioner 1 includes a refrigerant circuit 10 containing a refrigerant, an outdoor unit 20 which is a heat source unit installed in an outdoor space, and an indoor unit 30 which is a utilization unit installed in an indoor space. The refrigerant circuit 10 performs cooling operation and heating operation by circulating the refrigerant between the outdoor unit 20 and the indoor unit 30. The air conditioner 1 according to this embodiment is a pair type in which one outdoor unit 20 and one indoor unit 30 are connected. However, the air conditioner 1 may also be configured in such a way that one outdoor unit 20 is connected to multiple indoor units 30, or in such a way that multiple outdoor units 20 are connected to one indoor unit 30.

[0037] The refrigerant circuit 10 includes a first connection pipe 11 and a second connection pipe 12 that connect the outdoor unit 20 and the indoor unit 30. The first connection pipe 11 and the second connection pipe 12 are one or more tubes that connect the indoor space and the outdoor space and allow the refrigerant to flow. The first connection pipe 11 is a gas pipe that allows the refrigerant in a gaseous state to flow. The second connection pipe 12 is a liquid pipe that allows the refrigerant in a liquid state to flow.

[0038] The refrigerant circuit 10 also has an outdoor path 13 connected to one end of the first connecting pipe 11 and one end of the second connecting pipe 12 inside the outdoor unit 20. The refrigerant circuit 10 also has an indoor path 14 connected to the other end of the first connecting pipe 11 and the other end of the second connecting pipe 12 inside the indoor unit 30. The refrigerant circuit 10 forms an endless circulation circuit by the first connecting pipe 11, the second connecting pipe, the outdoor path 13, and the indoor path 14.

[0039] <Outdoor unit> The outdoor unit 20 has an outdoor path 13 installed inside a housing 20a, and thereby constitutes part of the refrigerant circuit 10. The outdoor unit 20 includes a compressor 21, an outdoor heat exchanger 22, an expansion valve 23, a four-way switching valve 24, and an outdoor fan 25. The compressor 21, the outdoor heat exchanger 22, the expansion valve 23, and the four-way switching valve 24 are connected to the outdoor path 13 of the outdoor unit 20.

[0040] During refrigeration cycle operation, the compressor 21 compresses low-pressure refrigerant drawn in through the suction connection end 21i to a high pressure, and discharges the high-pressure refrigerant from the discharge connection end 21o. For example, the compressor 21 may be a rotary device in which a sealed compression element is rotationally driven by a compressor motor 21m to pressurize the refrigerant. The suction connection end 21i and the discharge connection end 21o of the compressor 21 are connected to a four-way switching valve 24 through the outdoor path 13.

[0041] The outdoor heat exchanger 22 is a heat source-side heat exchanger 22 that dissipates heat from the refrigerant by exchanging heat between the refrigerant flowing therethrough and the outdoor air during refrigeration cycle operation in cooling operation. For example, a fin-and-tube mechanism can be used as this outdoor heat exchanger 22. A gas connection end 22G of the outdoor heat exchanger 22 is connected to the four-way switching valve 24 through the outdoor path 13. A liquid connection end 22L of the outdoor heat exchanger 22 is connected to the expansion valve 23 through the outdoor path 13.

[0042] The outdoor fan 25 blows outdoor air to the outdoor heat exchanger 22. As the outdoor fan 25, for example, a propeller fan having a motor and a propeller (not shown) can be used.

[0043] The expansion valve 23 reduces the pressure of the refrigerant that has flowed in through the outdoor path 13 to a low temperature. An electronic valve or a temperature-sensitive valve that adjusts the opening of an internal flow path is used as this expansion valve 23. The expansion valve 23 may also be provided in the indoor unit 30.

[0044] The four-way switching valve 24 reverses the flow of refrigerant in the refrigerant circuit 10 to selectively perform cooling operation or heating operation. The four-way switching valve 24 can be switched between a first state shown by the solid lines in Fig. 1 and a second state shown by the dashed lines in Fig. 1.

[0045] The four-way switching valve 24 has a first port 241, a second port 242, a third port 243, and a fourth port 244 to which multiple pipes constituting the refrigerant circuit 10 can be connected. The first port 241 of the four-way switching valve 24 is connected to a discharge connection end 21o of the compressor 21 via a pipe 13p of the outdoor path 13. The second port 242 of the four-way switching valve 24 is connected to a gas connection end 22G of the outdoor heat exchanger 22 via a pipe of the outdoor path 13. The third port 243 of the four-way switching valve 24 is connected to a pipe of the outdoor path 13 that is connected to the first connecting pipe 11. The third port 243 is connected to a gas connection end 31G of the indoor heat exchanger 31 via the first connecting pipe 11. The fourth port 244 of the four-way switching valve 24 is connected to a suction connection end 21i of the compressor 21 via a pipe of the outdoor path 13.

[0046] 1 , the four-way selector valve 24 can establish a first state in which the first port 241 and the second port 242 are in communication with each other and the third port 243 and the fourth port 244 are in communication with each other. As a result, in the first state, the four-way selector valve 24 communicates the discharge connection end 21o of the compressor 21 with the gas connection end 22G of the outdoor heat exchanger 22, while also communicating the suction connection end 21i of the compressor 21 with the first connecting pipe 11 outside the outdoor unit 20. In this first state, when the compressor 21 is driven, refrigerant flows from the first connecting pipe 11 into the outdoor path 13 of the outdoor unit 20. The refrigerant is compressed to a high pressure by the compressor 21 and moves to the outdoor heat exchanger 22 through the four-way selector valve 24. The refrigerant dissipates heat in the outdoor heat exchanger 22, and is further reduced in pressure in the expansion valve 23, becoming a low-pressure, low-temperature liquid, which then moves to the second connecting pipe 12. In other words, the air conditioning device 1 can perform cooling operation by drawing in high-temperature refrigerant via the first connecting pipe 11 and sending out low-temperature refrigerant to the indoor unit 30 via the second connecting pipe 12.

[0047] 1 , the four-way switching valve 24 can establish a second state in which the first port 241 and the third port 243 are communicated with each other and the second port 242 and the fourth port 244 are communicated with each other. As a result, in the second state, the four-way switching valve 24 communicates the discharge connection end 21o of the compressor 21 with the first connecting pipe 11 outside the outdoor unit 20, and also communicates the suction connection end 21i of the compressor 21 with the gas connection end 22G of the outdoor heat exchanger 22. In this second state, refrigerant flows from the second connecting pipe 12 into the outdoor path 13 of the outdoor unit 20 based on the operation of the compressor 21. The refrigerant moves through the expansion valve 23 to the outdoor heat exchanger 22 and then from the outdoor heat exchanger 22 to the compressor 21. The refrigerant is compressed in the compressor 21 to become a high-pressure, high-temperature gas, and moves to the first connecting pipe 11 through the four-way switching valve 24. In other words, the air conditioner 1 can perform heating operation by drawing in low-temperature refrigerant via the second connecting pipe 12 and sending high-temperature refrigerant to the indoor unit 30 via the first connecting pipe 11.

[0048] The outdoor path 13 of the outdoor unit 20 can be divided into a gas line 13G, which mainly circulates gasified refrigerant, and a liquid line 13L, which mainly circulates liquid refrigerant. The gas line 13G in the outdoor path 13 refers to the piping that connects the connection point with the first connecting pipe 11 to the compressor 21 and the gas connection end 22G of the outdoor heat exchanger 22. The liquid line 13L in the outdoor path 13 refers to the piping that connects the connection point with the second connecting pipe 12 to the expansion valve 23 and the liquid connection end 22L of the outdoor heat exchanger 22. A plurality of valves are provided in the gas line 13G and the liquid line 13L. For example, the plurality of valves include a first shut-off valve 41 and a second shut-off valve 42.

[0049] A first shut-off valve 41 is provided in the gas line 13G from the connection point of the first connecting pipe 11 to the compressor 21. Specifically, the first shut-off valve 41 is installed at the connection point between the gas line 13G and the first connecting pipe 11. The first shut-off valve 41 opens and closes the flow path of the gas line 13G based on the operation of an operator.

[0050] A second shut-off valve 42 is provided in the liquid line 13L from the connection point of the second connecting pipe 12 to the expansion valve 23. Specifically, the second shut-off valve 42 is installed at the connection point of the liquid line 13L and the second connecting pipe 12. The second shut-off valve 42 opens and closes the flow path of the liquid line 13L based on the operation of an operator.

[0051] Furthermore, the first shut-off valve 41 has a gas service port 44. The second shut-off valve 42 has a liquid service port 45. The gas service port 44 is larger than the liquid service port 45. The gas service port 44 and the liquid service port 45 are used when filling the refrigerant circuit 10 of the air conditioner 1 with refrigerant, when discharging refrigerant from the outdoor unit 20, when measuring the pressure of the refrigerant in the refrigerant circuit 10, etc.

[0052] <Indoor unit> On the other hand, the indoor unit 30 has an indoor path 14 installed inside a housing 30a, and thereby constitutes a part of the refrigerant circuit 10. The indoor unit 30 is equipped with an indoor heat exchanger 31 and an indoor fan 32. The indoor path 14 of the indoor unit 30 is connected to the indoor heat exchanger 31.

[0053] The indoor heat exchanger 31 is a user-side heat exchanger 31 that exchanges heat between the refrigerant flowing therethrough and the indoor air during refrigeration cycle operation. As a result, the indoor heat exchanger 31 can absorb heat from the indoor air to cool it when the refrigerant is at a lower temperature than the indoor air, and can release heat to the indoor air to warm it when the refrigerant is at a higher temperature than the indoor air. For example, a fin-and-tube mechanism can be used for this indoor heat exchanger 31. A gas connection end 31G of the indoor heat exchanger 31 is connected to the first connecting pipe 11 through the indoor path 14. A liquid connection end 31L of the indoor heat exchanger 31 is connected to the second connecting pipe 12 through the indoor path 14.

[0054] The indoor fan 32 blows indoor air to the indoor heat exchanger 31. For example, a cross-flow fan having a motor and a cylindrical impeller (not shown) is used as the indoor fan 32. The indoor air transported by the indoor fan 32 passes through the indoor heat exchanger 31 and is blown from the indoor heat exchanger 31 into the indoor space.

[0055] The indoor unit 30 also has a power supply circuit connected to a commercial power source. The air conditioning apparatus 1 operates the indoor unit 30 based on the supply of power from the commercial power source, and also operates the outdoor unit 20 via a power line (not shown).

[0056] <Air conditioner control unit> The air conditioning apparatus 1 has a control unit 90 that controls the operation of each component. The control unit 90 is made up of a first control device 91, a second control device 92, and a remote controller 93. The remote controller 93 is a device that allows the user to operate various commands to the air conditioning apparatus 1, and may be a dedicated controller or a mobile terminal such as a smartphone or tablet.

[0057] Each of the first control device 91, the second control device 92, and the remote controller 93 is a computer (more specifically, an MCU: Micro Control Unit) having a processor, memory, an input / output interface, and a communication interface. The processor is one or a combination of a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), a circuit made up of multiple discrete semiconductors, etc. The memory includes non-volatile memory and volatile memory. The memory stores programs that control various processes, and the processor controls various operations by reading and executing the programs stored in the memory.

[0058] The first control device 91 is provided in the outdoor unit 20 and controls each component of the outdoor unit 20. The second control device 92 is provided in the indoor unit 30 and controls each component of the indoor unit 30. The first control device 91 and the second control device 92 can send and receive information to and from each other via wired or wireless communication. The second control device 92 and the remote controller 93 can send and receive information to and from each other via wired or wireless communication. The control unit 90 selectively performs cooling operation or heating operation in response to an operation command from the remote controller 93 by the user.

[0059] <Refrigerant> The refrigerant to be filled in the refrigerant circuit 10 should preferably have a GWP value as small as possible and have a low environmental impact. Examples of this type of refrigerant material include those primarily composed of hydrocarbons with 1 to 4 carbon atoms, such as R-290 (propane), R-1270 (propylene), and R-600a (isobutane). These refrigerant materials are highly flammable refrigerants that are more flammable than hydrofluorocarbons. In this embodiment, a case where propane is used as the refrigerant will be described. Alternatively, the refrigerant may be methane (R50), ethane (R170), butane (R600), ammonia (R717), or the like.

[0060] <Odor components> As described above, the air conditioner 1 seals odorous components together with the refrigerant to alert humans to leakage of a highly flammable refrigerant from the refrigerant circuit 10. Examples of these odorous components include sulfur-based odorants, which are sulfur-based compounds. Examples of sulfur-based odorants include sulfide-based odorants such as tetrahydrothiophene (THT), dimethyl sulfide (DMS), and ethyl methyl sulfide, as well as sulfide-based odorants mixed with thiol, thioether, or the like. In this embodiment, a case where tetrahydrothiophene is used as the odorous component will be described. Hereinafter, tetrahydrothiophene may also be referred to as THT.

[0061] <Refrigerating machine oil> Furthermore, the air conditioner 1 has refrigerating machine oil sealed in the refrigerant circuit 10 along with the refrigerant and odorous components. The refrigerating machine oil is stored mainly at the bottom of the compressor 21 in the refrigerant circuit 10, and can be circulated to the compression elements in the compressor 21 to maintain the lubrication of the sliding parts. A portion of the refrigerating machine oil circulates within the refrigerant circuit 10 together with the refrigerant and odorous components. In other words, the refrigerating machine oil is mixed with the refrigerant and odorous components and used as a working fluid for the refrigeration system. The proportion of the refrigerating machine oil sealed in the total amount of working fluid for the refrigeration system is preferably 5% by mass or more and 60% by mass or less, and more preferably 10% by mass or more and 50% by mass or less.

[0062] Examples of refrigerating machine oils include oxygen-containing synthetic oils (ester-based refrigerating machine oils, ether-based refrigerating machine oils, etc.), hydrocarbon-based refrigerating machine oils, etc. Among these, ester-based refrigerating machine oils and ether-based refrigerating machine oils are preferred from the viewpoint of compatibility with the refrigerant. For example, polyalkylene glycol oil (PAG oil). One type of refrigerating machine oil may be used alone, or two or more types may be used in combination.

[0063] In the air conditioner 1 configured as described above, the refrigerant circuit 10 is filled with refrigerant and odorous components before operation. The refrigerant circuit 10 must be formed when the device is installed, and then filled after the refrigerant circuit 10 is evacuated. On the other hand, the odorous components can be sealed in advance in the outdoor path 13 of the refrigerant circuit 10 at a manufacturing factory or the like. However, if odorous components were to leak into the manufacturing factory, the working environment in the manufacturing factory would deteriorate. Therefore, it is conceivable to supply the odorous components to the refrigerant circuit 10 when the device is installed. However, even in this case, if odorous components were to leak outside the refrigerant circuit 10, there is a concern that nearby people who are unaware of the situation may become aware of an abnormality.

[0064] <Containment Unit> Therefore, in the air conditioner 1 according to the embodiment, a storage structure 50 containing odorous components is provided in advance in the refrigerant circuit 10. The storage structure 50 according to the embodiment is installed in the piping 13p of the outdoor path 13, which connects the discharge connection end 21o of the compressor 21 and the first port 241 of the four-way switching valve 24. This piping 13p circulates high-pressure, high-temperature refrigerant as the compressor 21 operates. The storage structure 50 is configured to release the odorous components stored in the storage structure 50 using the high-pressure, high-temperature refrigerant. However, the installation location of the storage structure 50 is not limited to this location, and the storage structure 50 may be installed anywhere in the closed refrigerant circuit 10. For example, the storage structure 50 may be installed in the piping between the second port 242 of the four-way switching valve 24 and the gas connection end 22G of the outdoor heat exchanger 22, or in the piping between the liquid connection end 22L of the outdoor heat exchanger 22 and the expansion valve 23.

[0065] As shown in FIG. 2, the accommodating structure 50 includes a protrusion 51 connected to the pipe 13p and a storage section 52 for the odor components OC stored inside the protrusion 51. The storage section 52 has a container 521c constituting the partition wall 521 and the odor components OC stored in the container 521c. In other words, the storage section 52 according to the embodiment is an object formed by the partition wall 521, and in this case, the storage section 52 and the partition wall 521 can be considered to be the same thing. The storage section 52 releases odor components to the outside of the storage section 52 when an opening operation is performed to open the partition wall 521. Furthermore, since the odor components OC are stored in the storage section 52, leakage of the odor components OC to the outside of the refrigerant circuit 10 can be prevented.

[0066] Protrusion 51 is formed in a substantially cylindrical shape, and has storage section 52 disposed at a branching position that protrudes laterally from flow path 13a of pipe 13p. Protrusion 51 protrudes in a direction perpendicular to the extension direction of pipe 13p. Protrusion 51 has main body 511 in which storage section 52 is disposed, and neck 512 that connects main body 511 to pipe 13p. In addition, restriction section 53 that reduces the cross-sectional area of ​​the space is formed between main body 511 and neck 512.

[0067] The main body 511 has an internal space 511s that accommodates the accommodation portion 52. The size of the main body 511 is set so that the inner surface of the main body 511 has a certain amount of clearance with respect to the outer surface of the accommodation portion 52.

[0068] One end of main body 511 forms restricting portion 53, while the other end of main body 511 forms closing portion 511a that is airtightly closed by a closing means such as welding. This closing portion 511a is open before accommodating portion 52 is placed in internal space 511s at a manufacturing factory or the like, and is closed after accommodating portion 52 is placed in internal space 511s. Closing portion 511a prevents accommodating portion 52 from falling off and also prevents leakage of the refrigerant and odorous components released from accommodating portion 52 during operation of the device.

[0069] Neck 512 is integrally molded with main body 511 and is firmly fixed to the wall of pipe 13p by a fixing means such as welding. A buffer space 512s formed inside neck 512 communicates with internal space 511s of main body 511 and flow path 13a of pipe 13p.

[0070] The restricting portion 53 forms a boundary between the main body portion 511 and the neck portion 512, and prevents the accommodation portion 52 disposed in the main body portion 511 from slipping out into the buffer space 512s. For example, the restricting portion 53 is formed by narrowing the cylindrical wall of the protrusion 51 radially inward. The inner diameter of this inner narrowed portion is set to a dimension smaller than the diameter of the accommodation portion 52 in the minor axis direction.

[0071] The container 521c of the storage section 52 has an egg-shaped outer peripheral surface and an inner peripheral surface, and stores the odor component OC in the space formed by this inner peripheral surface.

[0072] The size of the container 521c may be set according to the amount of odor component OC to be contained. As described above, THT is applied to the odor component OC, which is liquid at room temperature. In FIG. 2 and FIG. 4 described later, the odor component OC is depicted in granular form for ease of understanding. The amount of odor component OC depends on the volume of the refrigerant circuit 10 into which it is enclosed, but may be, for example, about 1 g to 5 g. The amount of odor component OC according to this embodiment is set to 2 g. Therefore, the container 521c is formed with a volume that can liquid-tightly enclose 2 g of odor component OC.

[0073] For example, the material, shape, thickness, etc. of the container 521c are set so that the container 521c itself will break when an external action such as an opening action is applied to the container 521c. Note that the expression "break" in this specification includes states in which the odorous component OC can escape from the container 521c, such as when a crack occurs and the container 521c separates into several pieces, or when the container 521c is shattered into small pieces, when a through hole is formed, or when only a portion of the container 521c is broken. Also, examples of opening actions of the container 521c include pressure or heat. In this specification, the expression "breaking due to "pressure or heat" includes breaking due to pressure alone, breaking due to heat alone, and breaking due to a combination of pressure and heat.

[0074] For example, the container 521c may be made of a rupture disc material that breaks when a target pressure is applied. The rupture disc material may be either a resin material or a metal material, as long as it is corrosion-resistant to the refrigerant. Examples of resin materials include tetrafluoroethylene resin, polyethylene, polypropylene, polyvinylidene fluoride, cellulose acetate, polysulfone, polyacrylonitrile, polyamide, polyimide, and polyamide-imide. Examples of metal materials include aluminum, stainless steel, and nickel. The thickness of the container 521c may be appropriately set depending on the material used so that it does not break below the target pressure but breaks above the target pressure.

[0075] Alternatively, container 521c can be made of a fusible plug material that breaks when heated above a target temperature. This fusible plug material can be either a resin or a metal material, as long as it is corrosive to the refrigerant. Examples of resin materials include polypropylene and polyvinyl chloride. Examples of metal materials include fusible alloys that melt above a target temperature, such as bismuth, cadmium, indium, lead, and tin.

[0076] In the illustrated example, the entire peripheral wall of container 521c is formed of the same material to form partition wall 521, but container 521c may be made of a material that cracks in part due to pressure or temperature, while the other part of the peripheral wall is made of a material that does not crack in part due to pressure or temperature. In other words, container 521c may have a peripheral wall that is partly made of partition wall 521 and another peripheral wall that is made of a material that is harder than partition wall 521.

[0077] The above-described container 52 is opened by being subjected to a target pressure or a target temperature from the refrigerant flowing through the flow path 13a, and is broken to release the odorous component OC therein. The target pressure may be, for example, 1.2 MPa or higher, and preferably 1.5 MPa or higher. The target temperature may be in the range of 55°C to 70°C, and preferably in the range of 50°C to 60°C.

[0078] Furthermore, the housing unit 52 is not limited to being breakable as long as the odorous component OC inside can be released to the outside of the housing unit 52. For example, the container 521c of the housing unit 52 may be made of a material that dissolves in the refrigerant.

[0079] The storage unit 52 is formed as an egg-shaped container 521c without any sharp edges so as not to be broken by contact with the protrusion 51, for example, during storage, transportation, or installation. However, the shape of the container 521c is not particularly limited, and may be spherical, cubic, rectangular, or another polygonal shape. Furthermore, the protrusion 51 stores the storage unit 52 so that the long axis of the container 521c is generally parallel to the axis of the cylinder (vertical orientation in FIG. 2). However, the storage state of the container 521c is not particularly limited, and for example, the container 521c may be disposed so that the axis of the protrusion 51 and the long axis of the container 521c are perpendicular to each other.

[0080] <Method of supplying odorous components> The air conditioner 1 according to the embodiment is basically configured as described above, and the odor component supply method will be described below with reference to the flowchart in Fig. 3. When installing the air conditioner 1, the worker installing the device performs steps S101 to S105 shown in Fig. 3 in order to construct the refrigerant circuit 10 in which the refrigerant and odor components are sealed.

[0081] Before the installation of the device, the air conditioner 1, which includes the outdoor unit 20 having the accommodation structure 50 and the indoor unit 30, is shipped from a manufacturing factory and provided to a user or worker of the air conditioner 1 (step S101: providing step). In this accommodation structure 50, a storage section 52 that stores odor component OC is disposed in the internal space 511s of the convex portion 51 whose blocking section 511a is closed (see also FIG. 2). The storage section 52 is prevented from entering the flow path 13a of the piping 13p by the restricting section 53 of the convex portion 51.

[0082] At the installation location of the provided air conditioner 1, an operator installs the outdoor unit 20 and the indoor unit 30, and connects the first communication pipe 11 and the second communication pipe 12 to the outdoor unit 20 and the indoor unit 30, thereby forming the refrigerant circuit 10 (step S102). As a result, the refrigerant circuit 10 forms a closed circuit that allows the refrigerant and odorous component OC to circulate and does not leak outside the refrigerant circuit 10.

[0083] Next, the worker fills the refrigerant circuit 10 with refrigerant via the gas service port 44 of the outdoor unit 20 (step S103). For example, when filling the refrigerant, the worker connects a hose connected to a tank of odor components, a compound pressure meter, and a vacuum pump to the gas service port 44, and performs vacuuming using the vacuum pump. Furthermore, the worker connects a refrigerant cylinder to the compound pressure meter instead of the vacuum pump, and pressure-feeds the refrigerant from the cylinder to the compound pressure meter, the odor component tank, and the gas service port 44 in that order. This allows the refrigerant circuit 10 to be smoothly filled with refrigerant.

[0084] After filling the refrigerant circuit 10 with refrigerant, the worker executes a test run mode that is predetermined when installing the air conditioner 1 (step S104). For example, in the test run mode, the compressor 21 of the outdoor unit 20 is operated to circulate the refrigerant that has been filled into the refrigerant circuit 10. By executing this test run mode, the worker can determine whether the refrigerant circuit 10 formed in step S102 is normal.

[0085] Then, in the trial operation mode, the pressure or heat of the circulating refrigerant is applied to the accommodation unit 52 of the accommodation structure 50, which causes the container 521c to open and release the odor component OC into the refrigerant circuit 10 outside the accommodation unit 52 (step S105: release step). Specifically, as shown in FIG. 4(A), the refrigerant flowing through the flow path 13a of the pipe 13p due to the operation of the compressor 21 also moves to the buffer space 512s communicating with the flow path 13a. Furthermore, the refrigerant moves from the buffer space 512s to the internal space 511s, and applies pressure or heat to the accommodation unit 52, which is an opening operation.

[0086] In particular, after a certain amount of time has passed since the compressor 21 started operating, the refrigerant flowing through the pipe 13p between the discharge connection end 21o of the compressor 21 and the first port 241 of the four-way switching valve 24 is heated to a high pressure and a high temperature by the compressor 21. When this refrigerant flows from the flow path 13a into the internal space 511s, as shown in FIG. 4(B), the accommodation section 52 receives a pressure equal to or higher than the target pressure or heat equal to or higher than the target temperature from the refrigerant, causing cracks in the peripheral wall of the container 521c and releasing the odor components OC contained therein. At this time, the odor components OC are released while mixing with the refrigerant and flow out of the internal space 511s, the buffer space 512s, and the flow path 13a in this order. In other words, the odor components OC are released into the refrigerant circuit 10 and circulate together with the refrigerant. The odor components OC then spread throughout the refrigerant circuit 10 over time.

[0087] As described above, the air conditioning apparatus 1 can release the odor components OC by using the high pressure and high temperature of the refrigerant in the test operation mode. In other words, the test operation mode performed by the operator corresponds to a mode of the air conditioning apparatus 1 in which pressure or heat is applied to the container 521c of the odor components OC to perform an opening operation to open the container 521c. This allows the air conditioning apparatus 1 to release odor components into the refrigerant circuit 10 in the test operation mode that is always performed when the apparatus is installed, and does not require the operator to perform another opening operation to release the odor components.

[0088] In particular, the protrusion 51, which is arranged branching off from the main path through which the refrigerant circulates in the refrigerant circuit 10, does not interfere with the flow of the refrigerant even if a broken containing portion 52 remains. This allows the refrigerant to circulate smoothly in the refrigerant circuit 10.

[0089] The air conditioning apparatus 1 according to the present disclosure is not limited to the above embodiment and may take various modified forms. For example, the refrigerant circuit 10 according to the embodiment uses a four-way switching valve 24 as a configuration for switching the circulation direction of the refrigerant. However, the refrigerant circuit 10 is not limited to using the four-way switching valve 24, and may be configured to switch the circulation direction of the refrigerant by using, for example, a three-way switching valve having a first port 241, a second port 242, and a third port 243.

[0090] Furthermore, the air conditioner 1 is not limited to breaking the storage section 52 and releasing the odor component OC in the test operation mode. For example, the air conditioner 1 may be configured so that the storage section 52 breaks when the refrigerant applies pressure or heat to the storage section 52 during cooling or heating operation. The air conditioner 1 may also be configured to have a special mode that further increases the pressure or temperature of the refrigerant, and to break the storage section 52 by executing this special mode.

[0091] Furthermore, the external action that causes the partition wall portion 521 to open is not limited to the pressure or heat of the refrigerant. For example, the partition wall portion 521 may be opened by applying heat to the accommodation structure 50 from the outside. Alternatively, the accommodation structure 50 itself may be provided with a heater, and the partition wall portion 521 may be opened by the heat of the heater. Alternatively, the partition wall portion 521 may be opened by applying vibration or impact to the accommodation portion 52 as pressure for the opening operation.

[0092] Other modified examples of the accommodation structure 50 and the accommodation portion 52 will be described below with reference to Figures 5 and 6. In the following description of the modified examples, the same components as those in the above embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

[0093] <First Modification> The accommodation structure 50A according to the first modified example shown in FIG. 5 differs from the accommodation structure 50 having a branched arrangement according to the embodiment in that the accommodation structure 50 is installed at a midpoint of the pipe 13p.

[0094] This accommodation structure 50A has a bulging portion 55 that is thicker radially outward than the pipe 13p, and an accommodation portion 52 for the odor component OC is disposed in an internal space 55s of this bulging portion 55.

[0095] Both axial ends of the internal space 55s are connected to the flow path 13a of the pipe 13p. The bulging portion 55 is formed in a cylindrical shape capable of accommodating the storage portion 52 with a certain amount of clearance, and is connected to the pipe 13p via a curved portion that is tapered. The shape of the storage structure 50A is not particularly limited as long as it can arrange the storage portion 52 for the odor component OC at a position midway through the refrigerant circuit 10. For example, the storage structure 50A may be a pipe that does not include the bulging portion 55 and whose inner and outer circumferential surfaces are linearly connected to the pipe 13p.

[0096] The accommodation structure 50A is provided with restricting portions 56 on both axial end sides of the internal space 55s of the bulging portion 55. The pair of restricting portions 56 has the accommodation portion 52 disposed therebetween, preventing the container 521c of the accommodation portion 52 from falling out of the accommodation structure 50A. For example, the restricting portion 56 may be a mesh 56m through which a refrigerant can flow. The number of meshes in the mesh 56m may be set small enough to prevent the container 521c from falling out after being broken. This allows the mesh 56m to circulate the refrigerant smoothly without interfering with the circulation of the refrigerant when the air conditioning apparatus 1 is operating in cooling or heating mode.

[0097] In the accommodation structure 50A according to the first modified example described above, pressure or heat can be applied to the accommodation portion 52 accommodated in the bulging portion 55 by the refrigerant flowing through the pipe 13p. The pressure or heat of the refrigerant causes the container 521c of the accommodation portion 52 to crack, thereby releasing the odor component OC to the outside of the accommodation portion 52, in other words, to the refrigerant circuit 10.

[0098] <Second Modification> 6 is provided in a branched arrangement on the pipe 13p, but differs from the above-described storage structures 50 and 50A in that the odorous component OC is filled in the convex portion 57 of the storage structure 50B itself, and the inlet is closed by a diaphragm 581. That is, in the storage section 52A of the second modification, the diaphragm 581 corresponds to the partition wall portion 58 that separates the inside and outside of the convex portion 57, and the main body portion 571 of the convex portion 57 constitutes the area other than the partition wall portion 58.

[0099] The protrusion 57 includes a box-shaped main body 571 having an internal space 571s, and a neck 572 connecting the main body 571 and the pipe 13p. The internal space 571s of the main body 571 is pre-filled with odorous components OC. The internal space 571s may be pre-filled with a refrigerant together with the odorous components OC.

[0100] The neck portion 572 is integrally formed with the main body portion 571 and is firmly fixed to the wall of the pipe 13p by a fixing means such as welding. The diaphragm 581 of the storage portion 52A is provided in a buffer space 572s formed inside the neck portion 572.

[0101] Similar to the container 521c described above, the diaphragm 581 is configured to break when opened by the application of refrigerant pressure or heat. For this reason, similar to the container 521c, the diaphragm 581 may be formed from a material such as a rupture disk or a fusible plug. When the diaphragm 581 breaks, the internal space 571s of the main body 571 and the flow path 13a of the pipe 13p communicate with each other, and the odorous component OC can be released into the refrigerant circuit 10.

[0102] Alternatively, the opening action for opening diaphragm 581 is not limited to the pressure or heat of the refrigerant. For example, as shown by the dotted line in FIG. 6 , containment structure 50B may be configured to include an operation unit 59 for opening diaphragm 581, and to open diaphragm 581 based on an operator's opening operation of operation unit 59. For example, operation unit 59 may have a part such as a needle or cutter that applies pressure to diaphragm 581 to pierce diaphragm 581, and an operator manually operates operation unit 59 outside containment structure 50B to create a through hole or crack in diaphragm 581. Note that a configuration in which the diaphragm is opened by an operator's manual operation may be employed in the containment structures 50 and 50A described above.

[0103] A valve (not shown) may be applied to the partition wall 58. An operator can release the odor component OC from the storage section 52A by opening the valve.

[0104] <Aspects and Effects of the Present Disclosure> The above-disclosed embodiment has, for example, the following aspects and effects.

[0105] A first aspect of the present disclosure is a refrigeration device 1 having a refrigerant circuit 10 that seals in a refrigerant and circulates the refrigerant, and the refrigerant circuit 10 is provided with storage sections 52, 52A that store odorous components OC, and the storage sections 52, 52A have partition sections 521, 58 that separate the inside and outside of the storage sections 52, 52A, and the storage sections 52, 52A release the odorous components OC to the outside of the storage sections 52, 52A by performing an opening operation to open the partition sections 521, 58.

[0106] As described above, the refrigeration device 1 includes the storage units 52, 52A that store the odor components OC in the refrigerant circuit 10, and thus the odor components OC can be easily and smoothly supplied into the refrigerant circuit 10 when the device is installed. That is, the storage units 52, 52A release the odor components OC to the outside of the storage units 52, 52A based on the opening operation of the partition walls 521, 58, and thus the odor components OC can be smoothly supplied to the refrigerant circuit 10.

[0107] The opening operation is performed by applying pressure or heat to the partitions 521 and 58 .

[0108] This allows the refrigeration device 1 to easily open the partition walls 521 and 58 and release the odorous component OC to the outside of the storage sections 52 and 52A.

[0109] The opening operation is performed by applying the heat or pressure of the refrigerant to the partitions 521 and 58 .

[0110] As a result, the refrigeration device 1 can open the partitions 521 and 58 by using the refrigerant circulating through the refrigerant circuit 10, eliminating the need for other operations on the partitions 521 and 58, thereby improving work efficiency and preventing forgetting to open the partitions.

[0111] The refrigerant circuit 10 also includes a compressor 21 that compresses the refrigerant, a heat source side heat exchanger (outdoor heat exchanger 22), a utilization side heat exchanger (indoor heat exchanger 31), a switching valve (four-way switching valve 24) having a first port 241, a second port 242, and a third port 243, and piping 13p that connects the compressor 21 and the switching valve, the first port 241 is connected to the compressor 21 via the piping 13p, the second port 242 is connected to the heat source side heat exchanger, and the third port 243 is connected to the utilization side heat exchanger, the switching valve is switchable between a state in which the first port 241 and the second port 242 are connected to each other and a state in which the first port 241 and the third port 243 are connected to each other, and the storage sections 52, 52A are provided in the piping 13p.

[0112] As a result, in the refrigeration device 1, the accommodation sections 52, 52A can be arranged in the refrigerant circuit 10 at a location where the refrigerant is likely to reach the highest pressure and temperature, and the pressure or heat of the refrigerant can be effectively utilized.

[0113] The opening operation is performed by applying pressure to the partition walls 521 and 58 from outside the refrigerant circuit 10.

[0114] Even in this case, for example, an operator can apply pressure from outside the refrigerant circuit 10 to open the partition walls 521 and 58, thereby easily releasing the odor component OC into the refrigerant circuit 10.

[0115] Furthermore, the partition wall 521 is a container 521c that entirely covers the odor components.

[0116] This allows the refrigeration device 1 to easily accommodate the accommodation section 52 in which the odorous component OC is covered with the container 521c in the accommodation structure 50, 50A, thereby improving the efficiency of the manufacturing process.

[0117] The partition wall 58 is a diaphragm 581 that separates the inside and outside of the housing structure 50B.

[0118] Even in this case, the refrigeration device 1 can separate the storage section 52B for the odor components OC from the refrigerant circuit 10 in advance by the diaphragm 581, and can smoothly release the odor components OC by the opening operation.

[0119] The accommodation structures 50, 50B are provided on protrusions 51, 57 that protrude laterally from the pipe 13p through which the refrigerant of the refrigerant circuit 10 flows.

[0120] This allows the refrigeration device 1 to easily release the odorous components OC from the convex portions 51, 57 to the refrigerant circuit 10. Furthermore, the refrigeration device 1 does not need to interfere with the circulation of the refrigerant in the refrigerant circuit 10 in the containing portions 52, 52A.

[0121] The refrigerant circuit 10 also has restricting portions 53 and 56 that restrict the movement of the partition portions 521 and 58.

[0122] The regulating portions 53 and 56 allow the refrigeration device 1 to easily prevent the partition portions 521 and 58 from leaking into the refrigerant circuit 10.

[0123] The refrigerant is a highly flammable refrigerant.

[0124] This allows the refrigeration device 1 to circulate the refrigerant with a low GWP value in the refrigerant circuit 10 together with the odorous component OC released from the accommodation structures 50, 50A, 50B.

[0125] The refrigerant is a refrigerant whose main component is a hydrocarbon.

[0126] This allows a refrigerant with a low GWP value to circulate in the refrigerant circuit.

[0127] The odorous components include one or more of tetrahydrothiophene, dimethyl sulfide, and ethyl methyl sulfide.

[0128] As a result, the odorous components have superior odor quality and odor threshold compared to other sulfide-based components, and are chemically stabilized, so that the composition of the odorous components can be well maintained in the refrigerant circuit 10.

[0129] Furthermore, a second aspect of the present disclosure is a method for supplying odor components to a refrigeration device 1 having a refrigerant circuit 10 that seals in a refrigerant and circulates the refrigerant, the method comprising: a providing step of providing the refrigerant circuit 10 having storage sections 52, 52A that have odor components stored therein in advance; and a releasing step of releasing the odor components OC to the outside of the storage sections 52, 52A by performing an opening operation to open the partition sections 521, 58 that separate the inside and outside of the storage sections 52, 52A in the storage sections 52, 52A.

[0130] Even in this case, the odorous component OC can be easily supplied into the refrigerant circuit 10 when the device is installed.

[0131] The refrigeration device 1 according to the presently disclosed embodiment is illustrative in all respects and not restrictive. The embodiment may be modified and improved in various ways without departing from the spirit and scope of the appended claims. The features described in the above-described embodiments may be configured differently and may be combined within a consistent range. [Explanation of symbols]

[0132] 1. Refrigeration equipment (air conditioning equipment) 10 Refrigerant circuit 13p Piping 21 Compressor 22 Outdoor heat exchanger 24 Four-way valve 241 Port 1 242 Port 2 243 Port 3 31 Indoor heat exchanger 51, 57 Convex parts 52, 52A housing 521, 58 Bulkhead section 521c container 53, 56 Regulatory Department 581 Diaphragm OC odor components

Claims

1. A refrigeration system (1) having a refrigerant circuit (10) that circulates a refrigerant, The refrigerant circuit (10) is provided with a storage section (52, 52A) that stores an odor component (OC), The storage section (52, 52A) has a partition wall (521, 58) that separates the inside and outside of the storage section (52, 52A), The storage section (52, 52A) performs an opening operation to open the partition section (521, 58), thereby releasing the odor component (OC) to the outside of the storage section (52, 52A). Refrigeration equipment.

2. The opening operation is performed by applying pressure or heat to the partitions (521, 58). The refrigeration system of claim 1.

3. The opening operation is performed by applying heat or pressure of the refrigerant to the partition wall portion (521, 58).

3. The refrigeration system of claim 2.

4. The refrigerant circuit (10) includes a compressor (21) that compresses the refrigerant, a heat source side heat exchanger (22), a user side heat exchanger (31), a switching valve (24) having a first port (241), a second port (242), and a third port (243), and a pipe (13p) that connects the compressor (21) and the switching valve (24), The first port (241) is connected to the compressor (21) via the pipe (13p), The second port (242) is connected to the heat source side heat exchanger (22), The third port (243) is connected to the utilization side heat exchanger (31), the switching valve (24) is switchable between a state in which the first port (241) and the second port (242) are in communication with each other and a state in which the first port (241) and the third port (243) are in communication with each other; The storage portion (52, 52A) is provided in the pipe (13p).

4. The refrigeration system of claim 3.

5. The opening operation is performed by applying the pressure to the partition wall portion (521, 58) from outside the refrigerant circuit (10).

3. The refrigeration system of claim 2.

6. The partition (521) is a container (521c) that entirely covers the odor component (OC).

6. The refrigeration system according to claim 1.

7. The partition wall (58) is a diaphragm (581) that separates the inside and outside of the storage section (52A).

6. The refrigeration system according to claim 1.

8. The storage portion (52, 52A) is provided in a protrusion (51, 57) protruding laterally from a pipe (13p) through which the refrigerant of the refrigerant circuit (10) flows.

6. The refrigeration system according to claim 1.

9. The refrigerant circuit (10) has a restricting portion (53, 56) that restricts movement of the partition wall portion (521).

6. The refrigeration system according to claim 1.

10. The refrigerant is a highly flammable refrigerant.

6. The refrigeration system according to claim 1.

11. The refrigerant is a refrigerant mainly composed of a hydrocarbon.

6. The refrigeration system according to claim 1.

12. The odor component (OC) contains any one of tetrahydrothiophene, dimethyl sulfide, and ethyl methyl sulfide, or one or more of these as a component.

6. The refrigeration system according to claim 1.

13. A method for supplying odorous components (OC) to a refrigeration device (1) having a refrigerant circuit (10) that circulates a refrigerant by sealing the refrigerant therein, comprising: a providing step of providing the refrigerant circuit (10) provided with a storage section (52, 52A) that previously stores the odor component (OC); a release step of releasing the odor component (OC) to the outside of the storage section (52, 52A) by performing an opening operation of opening a partition section (521, 58) separating the inside and outside of the storage section (52, 52A) in the storage section (52, 52A). Method of supplying odorous components.

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