WO2019224865A1

WO2019224865A1 - Air conditioner and packaging set for air conditioner

Info

Publication number: WO2019224865A1
Application number: PCT/JP2018/019456
Authority: WO
Inventors: 英明前山
Original assignee: 三菱電機株式会社
Priority date: 2018-05-21
Filing date: 2018-05-21
Publication date: 2019-11-28
Also published as: EP3961119A1; EP3798527A4; EP3961119B1; EP3798527A1; JPWO2019224865A1; CN114777285A; CN112154292B; JP7009624B2; CN112154292A

Abstract

An air conditioner (100) according to an aspect of the present invention allows a flammable refrigerant to circulate through, in order, a compressor (3), a first heat exchanger (1), an expansion valve (5), and a second heat exchanger (6). The compressor (3) stores a refrigerating machine oil and discharges the same with the refrigerant. The refrigerating machine oil circulates through, in order, the compressor (3), the first heat exchanger (1), the expansion valve (5), and the second heat exchanger (6) with the refrigerant. The first heat exchanger (1) is disposed in a first room. The second heat exchanger (6) is disposed in a second room. The air conditioner (100) is provided with a first sensor (s1), a second sensor (s2), and a control device (8). The first sensor (s1) detects a refrigerant in the first room. The second sensor (s2) detects an odor of a refrigerating machine oil in the first room. The control device (8) detects leaking of a refrigerant using a first detected signal from the first sensor (s1) and a second detected signal from the second sensor (s2).

Description

Air conditioner and air conditioner packing set

The present invention relates to an air conditioner having a leakage detection function for a flammable refrigerant and a packaging set of the air conditioner.

Conventionally, an air conditioner having a leakage detection function for a flammable refrigerant is known. For example, International Publication No. 2017/187618 pamphlet (Patent Document 1) discloses an air conditioner including a refrigerant detecting means for detecting the concentration of a combustible refrigerant in a room. In the air conditioner, when the refrigerant concentration detected by the refrigerant detection means is equal to or greater than the threshold value, the indoor fan is operated with a preset air volume. As a result, it is possible to suppress the formation of a combustible concentration region in the room when the refrigerant leaks.

International Publication No. 2017/187618 Pamphlet

Refrigeration oil stored in the compressor is normally discharged from the compressor together with the refrigerant and circulates in the air conditioner. Therefore, when the refrigerant is leaking, the refrigeration oil is also almost leaking. However, in patent document 1, it is not considered about refrigeration oil leaking with a refrigerant | coolant.

The present invention has been made to solve the above-described problems, and an object thereof is to improve the safety of the air conditioner.

In the air conditioner according to one aspect of the present invention, the combustible refrigerant circulates in the order of the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger. The compressor stores the refrigerating machine oil and discharges the refrigerating machine oil together with the refrigerant. The refrigerating machine oil circulates together with the refrigerant in the order of the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger. The first heat exchanger is disposed in the first space. The second heat exchanger is disposed in the second space. The air conditioner includes a first sensor, a second sensor, and a control device. The first sensor detects the refrigerant in the first space. The second sensor detects the odor of the refrigerating machine oil in the first space. The control device detects the leakage of the refrigerant using the first detection signal from the first sensor and the second detection signal from the second sensor.

In the air conditioner according to another aspect of the present invention, the combustible refrigerant circulates in the order of the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger. The compressor stores the refrigerating machine oil and discharges the refrigerating machine oil together with the refrigerant. The refrigerating machine oil circulates together with the refrigerant in the order of the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger. The first heat exchanger is disposed in the first space. The second heat exchanger is disposed in the second space. The air conditioner includes a sensor, a sample storage unit, and a control device. The sensor detects the refrigerant in the first space. The sample storage unit stores a sample of refrigerating machine oil and can release the odor of the sample to the outside. The control device detects the leakage of the refrigerant using a detection signal from the sensor.

An air conditioner packaging set according to another aspect of the present invention is an air conditioner packaging set in which a combustible refrigerant circulates in the order of a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger. It is. During operation of the air conditioner, the compressor stores refrigeration oil and discharges the refrigeration oil together with the refrigerant. The refrigerating machine oil circulates together with the refrigerant in the order of the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger. The first heat exchanger is disposed in the first space. The second heat exchanger is disposed in the second space. The air conditioner includes a sensor and a control device. The sensor detects the refrigerant in the first space. The control device detects the leakage of the refrigerant using a detection signal from the sensor. The packing set includes a sample of refrigeration oil and a packing box. The packaging box contains at least one of a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, a sensor, and a control device and a sample.

According to the air conditioner and the air conditioner packaging set according to the present invention, it is possible to detect the refrigerant leaked into the first space even by the odor of the refrigeration oil. Therefore, the detection accuracy of the refrigerant leak in the first space is improved. be able to. As a result, the safety of the air conditioner can be improved.

2 is a functional block diagram illustrating a configuration of the air conditioner according to Embodiment 1. FIG. It is a schematic external view of the indoor unit of the air conditioner of FIG. It is a flowchart which shows the flow of the refrigerant | coolant leak detection process performed by a control apparatus. It is a flowchart which shows the other example of the flow of the refrigerant | coolant leak detection process performed by a control apparatus. It is a coordinate plane showing the relationship between the detection level of the refrigerant sensor and the detection level of the odor sensor, with the X axis as the detection level of the refrigerant sensor and the Y axis as the detection level of the odor sensor. It is a flowchart which shows the flow of the process which determines refrigerant | coolant leakage by whether it is contained in the refrigerant | coolant leakage area | region. 6 is a functional block diagram illustrating a configuration of an air conditioner according to Embodiment 2. FIG. 6 is a functional block diagram illustrating a configuration of an air conditioner according to Embodiment 3. FIG. It is a schematic external view of the indoor unit of the air conditioner of FIG. FIG. 10 is a schematic external view of the sample container of FIG. 9. It is a figure which shows a mode that the indoor unit is packed by the packing set of the air conditioner which concerns on Embodiment 4. FIG. It is a figure which shows a mode that the packing set of FIG. 11 was unpacked.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated in principle.

Embodiment 1 FIG.
FIG. 1 is a functional block diagram illustrating a configuration of an air conditioner 100 according to Embodiment 1. FIG. 2 is a schematic external view of the indoor unit 10 of the air conditioner 100 of FIG. In the air conditioner 100, a refrigerant containing combustible R290 (propane) is used. The air conditioner 100 includes a heating mode, a cooling mode, and a defrosting mode as operation modes. As shown in FIG. 1, the air conditioner 100 includes an indoor unit 10 and an outdoor unit 11. Both the indoor unit 10 and the outdoor unit 11 are supplied with power from the main power source Ps1 (first power source).

The indoor unit 10 is arranged indoors (first space). The indoor unit 10 includes an indoor heat exchanger 1 (first heat exchanger), an indoor fan 2, a refrigerant sensor s1 (first sensor), and an odor sensor s2 (second sensor). The outdoor unit 11 is disposed outside (second space). The outdoor unit 11 includes a compressor 3, a four-way valve 4, an expansion valve 5, an outdoor heat exchanger 6 (second heat exchanger), an outdoor fan 7, and a control device 8. The compressor 3 stores refrigerating machine oil for lubricating the compression mechanism. The refrigerating machine oil is a refrigerating machine oil having a unique odor and includes, for example, PAG (PolyAlkylene Glycol) oil.

In the heating mode, the control device 8 controls the four-way valve 4 to form a flow path so that the refrigerant circulates in the order of the compressor 3, the indoor heat exchanger 1, the expansion valve 5, and the outdoor heat exchanger 6. . In the heating mode, the indoor heat exchanger 1 functions as a condenser, and the outdoor heat exchanger 6 functions as an evaporator.

In the cooling mode and the defrosting mode, the control device 8 controls the four-way valve 4 so that the refrigerant circulates in the order of the compressor 3, the outdoor heat exchanger 6, the expansion valve 5, and the indoor heat exchanger 1. Form a road. In the cooling mode and the defrosting mode, the indoor heat exchanger 1 functions as an evaporator, and the outdoor heat exchanger 6 functions as a condenser.

The control device 8 controls the amount of refrigerant discharged by the compressor 3 per unit time by controlling the driving frequency of the compressor 3. The control device 8 adjusts the opening degree of the expansion valve 5. The control device 8 controls the air volume per unit time of the indoor fan 2 and the outdoor fan 7.

In the indoor unit 10, the refrigerant sensor s <b> 1 and the odor sensor s <b> 2 are disposed further down than the indoor heat exchanger 1 with respect to the blowing direction by the indoor fan 2. The refrigerant sensor s1 outputs a detection signal (first detection signal) indicating the refrigerant concentration to the control device 8. The odor sensor s2 outputs a detection signal (second detection signal) indicating the odor of the refrigeration oil to the control device 8.

The refrigerating machine oil stored in the compressor 3 is normally discharged from the compressor 3 together with the refrigerant and circulates through the air conditioner 100. Therefore, when the refrigerant is leaking, the refrigeration oil is also almost leaking.

Therefore, in the first embodiment, refrigerant leakage in the room is detected using the refrigerant concentration and the odor of the refrigerating machine oil. By using the odor of refrigerating machine oil in addition to the refrigerant concentration, the accuracy of refrigerant leakage detection can be improved compared to the case of detecting refrigerant leakage using only the refrigerant concentration, thereby improving the safety of the air conditioner. Can do.

FIG. 3 is a flowchart showing the flow of the refrigerant leakage detection process performed by the control device 8. The process shown in FIG. 3 is called regularly or irregularly by a main routine (not shown) that controls the operation of the air conditioner 100. Hereinafter, the step is also referred to as S. The detection level L1 represents the level of the detection signal of the refrigerant sensor s1, and the detection level L2 represents the level of the detection signal of the odor sensor s2.

As shown in FIG. 3, the control device 8 determines in S11 whether or not the detection level L1 of the indoor refrigerant concentration is greater than a threshold A1 (first threshold). When detection level L1 is larger than threshold value A1 (YES in S11), control device 8 returns the process to the main routine after performing the safety ensuring process in S14. In the safety ensuring process, for example, the indoor fan 2 is used to stir the indoor air to make the refrigerant distribution in the room uniform, thereby reducing the refrigerant concentration, generating an alarm sound, blinking the lamp, and displaying a message.

When the indoor refrigerant concentration detection level L1 is equal to or lower than the threshold value A1 (NO in S11), the control device 8 determines in S12 whether the indoor refrigeration oil detection level L2 is greater than the threshold value B1 (second threshold value). Determine. When the detection level L2 of the indoor refrigeration oil is larger than the threshold value B1 (YES in S12), the control device 8 returns the process to the main routine after performing the safety ensuring process in S14. When the detection level L2 of the indoor refrigeration oil is equal to or lower than the threshold value B1 (NO in S12), the control device 8 returns the process to the main routine.

In FIG. 3, the refrigerant leakage determination using the refrigerant concentration (S11) and the refrigerant leakage determination using the odor of the refrigerating machine oil (S12) are performed in different steps. The refrigerant leakage determination may be performed using both the refrigerant concentration and the odor of the refrigerating machine oil in the same step. For example, the process shown in FIG. 4 may be performed instead of the process shown in FIG. In FIG. 4, the detection level L1 is equal to or lower than the threshold value A1 (NO in S11) in the refrigerant leakage determination using the refrigerant concentration, and the detection level L2 is equal to or lower than the threshold value B1 in the refrigerant leakage determination using the odor of the refrigerating machine oil ( If NO in S12, a refrigerant leakage determination (S13) is performed using the refrigerant concentration and the odor of the refrigerating machine oil together.

Since the detection level L1 is not more than the threshold A1 and the detection level L2 is not more than the threshold B1 at the time when S13 is performed, the detection level L1 is not more than the threshold A1 and the detection level L2 is not more than the threshold B1 in S13. It is necessary to set conditions to be determined as refrigerant leakage in the following range. Therefore, in FIG. 4, the threshold A2 (third threshold) is smaller than the threshold A1, and the threshold B2 (fourth threshold) is smaller than the threshold B1.

As shown in FIG. 4, when neither of the conditions of S11 and S12 is satisfied (NO in S11 and NO in S12), the control device 8 determines that the detection level L1 is larger than the threshold value A2 and is detected in S13. It is determined whether level L2 is greater than threshold value B2. When detection level L1 is greater than threshold value A2 and detection level L2 is greater than threshold value B2 (YES in S13), control device 8 performs a safety ensuring process in S14 and returns the process to the main routine. When detection level L1 is equal to or lower than threshold A2, or detection level L2 is equal to or lower than threshold B2 (NO in S13), control device 8 returns the process to the main routine.

3 and 4, the refrigerant leakage determination condition is a condition that the refrigerant concentration detection level L1 or the refrigerating machine oil detection level L2 is greater than a threshold value. Whether the refrigerant leakage determination condition includes a point specified by the detection level L1 and the detection level L2 in the refrigerant leakage region to be determined as refrigerant leakage on the coordinate plane indicating the relationship between the detection level L1 and the detection level L2. It may be determined depending on whether or not.

FIG. 5 is a coordinate plane showing the relationship between the detection level L1 and the detection level L2, with the X axis being the refrigerant concentration detection level L1 and the Y axis being the refrigeration oil detection level L2. The refrigerant leakage area shown in FIG. 5 is expressed as the following equation (1). The detection level L1 and the detection level L2 that satisfy Equation (1) are included in the refrigerant leakage region. The threshold value A2 of the detection level L1 and the threshold value B2 of the detection level L2 in FIG. 4 are, for example, the boundary line (point P1 (A1, 0) between the refrigerant leakage region and the non-refrigerant leakage region (region not satisfying the expression (1)). ) And the point P2 (0, B1) are set to the detection level L1 and the detection level L2 of the point P3 on the line).

FIG. 6 is a flowchart showing a flow of processing for determining refrigerant leakage using the equation (1). The flowchart shown in FIG. 6 is a flowchart in which S11 and S12 in FIG. 3 are replaced with S10. As shown in FIG. 6, the control device 8 determines whether or not the detection level L1 and the detection level L2 satisfy Expression (1). When detection level L1 and detection level L2 satisfy Expression (1) (YES in S10), control device 8 performs a safety ensuring process in S14 and returns the process to the main routine. When detection level L1 and detection level L2 do not satisfy Expression (1) (NO in S10), control device 8 returns the process to the main routine.

As described above, according to the air conditioner according to Embodiment 1 and

Modifications

1 and 2, the safety of the air conditioner can be improved.

Embodiment 2. FIG.
In Embodiment 1, the case where the refrigerant sensor and the odor sensor are supplied with power from the power supply of the air conditioner has been described. In the second embodiment, a case where at least one of the refrigerant sensor and the odor sensor is supplied with power from a power source different from the power source of the air conditioner will be described. With such a configuration, even when power is not supplied to the air conditioner (when the air conditioner and the power source are not connected or when there is a power failure), at least one of the refrigerant sensor or the odor sensor is Since it is operating, it is possible to detect refrigerant leakage.

FIG. 7 is a functional block diagram showing the configuration of the air conditioner 200 according to the second embodiment. The configuration of the air conditioner 200 is that the auxiliary power source Ps2 (second power source) is added to the configuration of the air conditioner 100 of FIG. It is a configuration. Since the other configuration is the same, the description will not be repeated.

As shown in FIG. 7, the auxiliary power supply Ps2 supplies power to the odor sensor s22. Auxiliary power supply Ps2 includes, for example, a battery. When the detection level L2 exceeds the threshold value B1, the odor sensor s22 notifies the refrigerant leakage by, for example, an alarm sound, a blinking lamp, or a message display. The sensor to which power is supplied from the auxiliary power source Ps2 when the power supply from the main power source Ps1 is stopped (for example, when the outlet of the air conditioner 200 is disconnected from the main power source Ps1 or in the event of a power failure) The sensor s21 may be used. In this case, when the detection level L1 exceeds the threshold value A1, the refrigerant sensor s21 notifies the refrigerant leakage by, for example, an alarm sound, blinking of a lamp, or display of a message. Even when the power supply from the main power supply Ps1 is stopped, since at least one of the refrigerant sensor s1 and the odor sensor s22 is operating, the refrigerant leakage can be detected by the operating sensor.

In order to ensure the power of the auxiliary power source Ps2 in an emergency when the power supply from the main power source Ps1 stops, the sensor supplied with the power from the auxiliary power source Ps2 normally receives the power from the main power source Ps1 and receives the auxiliary power source. It is preferable that the power of Ps2 is not consumed and the power is received from the auxiliary power source Ps2 in an emergency. In order to improve the detection accuracy of the refrigerant leakage, both the refrigerant sensor s1 and the odor sensor s2 are operated so that both the refrigerant sensor s1 and the odor sensor s2 operate even when the power supply from the main power supply Ps1 is stopped. It is more preferable to supply power from the auxiliary power source Ps2.

As described above, according to the air conditioner according to the second embodiment, refrigerant leakage can be detected even when power is not supplied to the air conditioner. Therefore, the safety of the air conditioner is improved compared to the first embodiment. Further improvement can be achieved.

Embodiments 3 and 4.
In

Embodiment

1, 2, the structure which detects the odor of refrigerating machine oil with a sensor was demonstrated. In

Embodiments

3 and 4, a configuration will be described in which the user himself / herself can recognize that the refrigeration oil is leaking indoors by making the user recognize the odor of the cooling oil.

It is known that R290 contained in the refrigerant used in the air-conditioning apparatus according to Embodiment 1 is almost odorless. In addition, since the refrigerant circulating in the air conditioner is required to have chemical stability, an odorant is not usually mixed with the refrigerant. Therefore, it is often difficult for the user to notice the odor of the refrigerant leaked into the room.

On the other hand, since refrigeration oil such as PAG oil has a unique odor, when the refrigeration oil leaks from the air conditioner together with the refrigerant, the user may find that the room contains a different odor. It is possible to notice. However, it is often the case that the user is not aware that the odor is that of refrigeration oil.

Therefore, in

Embodiments

3 and 4, the odor of the refrigerating machine oil is made to be recognized by the user in advance using a sample of refrigerating machine oil used for lubrication in the compressor of the air conditioner. When the user feels the odor in the room, the user can notice that the refrigerating machine oil is leaking into the room. In addition to refrigerant leakage determination using refrigerant concentration by the air conditioner, the user can notice the odor of the refrigerator oil in the room, so the safety of the air conditioner is better than when the user does not know the odor of the refrigerator oil Can be improved. Moreover, even if it is a case where electric power is not supplied to the air conditioning apparatus, the user himself / herself can notice the refrigerant leakage. Furthermore, according to the third and fourth embodiments, the odor sensor is unnecessary, and therefore the manufacturing costs of the third and fourth embodiments can be reduced compared to the first and second embodiments.

In Embodiment 3, an air conditioner in which an indoor unit is provided with a sample storage unit for refrigeration oil will be described. In Embodiment 4, a packaging set of an air conditioner in which a sample container of refrigeration oil separate from the air conditioner is packaged together with the air conditioner will be described.

Embodiment 3 FIG.
FIG. 8 is a functional block diagram showing the configuration of the air conditioner 300 according to Embodiment 3. As shown in FIG. The configuration of the air conditioner 300 is a configuration in which the indoor unit 10 of the air conditioner 100 in FIG. 1 is replaced with the indoor unit 30, and the control device 8 of the outdoor unit 11 is replaced with the control device 38. The configuration of the indoor unit 30 is a configuration in which the odor sensor s2 is removed from the configuration of the indoor unit 10 and a sample container 31 (sample storage unit) is detachably attached as shown in FIG. The control device 38 receives the detection signal from the refrigerant sensor s1, and performs refrigerant leakage determination using the refrigerant concentration, but does not perform refrigerant leakage determination using the odor of the refrigerating machine oil. The control device 38 performs safety ensuring processing when the refrigerant concentration detection level L1 is greater than the threshold value A1. Since the configuration other than these is the same, the description will not be repeated.

FIG. 10 is a schematic external view of the sample container 31 of FIG. As shown in FIG. 10, the sample container 31 includes a resin main body 311 and a resin lid 312. The main body 311 accommodates a sponge Spg in which a sample of refrigerating machine oil used for lubricating the compressor 3 of FIG. When the lid 312 is attached to the main body 311 (FIG. 10A), the odor of the refrigerating machine oil is sealed inside the sample container 31 and hardly leaks outside the sample container 31. It is attached to the air conditioner 300 in the state shown in FIG. The sample container 31 can release the odor of the sample of the refrigerating machine oil to the outside in a state where the lid 312 is removed from the main body 311 (FIG. 10B). The user removes the sample container 31 from the air conditioner 300, removes the lid 312 from the main body 311 as shown in FIG. 10B, and confirms the odor of the refrigerating machine oil.

As mentioned above, according to the air conditioner concerning Embodiment 3, while being able to improve the safety | security of an air conditioner, the manufacturing cost of an air conditioner can be reduced rather than

Embodiment

1,2.

Embodiment 4 FIG.
FIG. 11 is a diagram illustrating a state where the indoor unit 40 is packed by the air conditioner packing set 400 according to the fourth embodiment. The appearance of the indoor unit 40 is the same as that of the indoor unit 10 shown in FIG. Moreover, the indoor unit 40 does not include an odor sensor like the indoor unit 30 shown in FIG. As shown in FIG. 11, the indoor unit 40 is housed in a packing box 41 with both ends covered with

buffering agents

42 and 43. When the packaging box 41 is slid in the longitudinal direction of the indoor unit 40, the packaging set 400 is unpacked.

FIG. 12 is a view showing a state where the packing set 400 of FIG. 11 is unpacked. As shown in FIG. 12, a remote controller Rm, an instruction manual packed together with a sample container 31 for refrigerating machine oil, and the like are attached to the rear surface of the indoor unit 40. The sample container 31 is the same as that shown in FIG. 10, and contains a sponge in which refrigeration oil is soaked. The user can check the odor of the refrigerating machine oil using the sample container 31.

As described above, according to the air conditioner packaging set according to the fourth embodiment, the safety of the air conditioner can be improved and the manufacturing cost of the air conditioner can be reduced as compared with the first and second embodiments. Can do.

The embodiments disclosed this time are also scheduled to be implemented in appropriate combinations within a consistent range. Each embodiment disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 indoor heat exchanger, 2 indoor fan, 3 compressor, 4 four-way valve, 5 expansion valve, 6 outdoor heat exchanger, 7 outdoor fan, 8, 38 control device, 10, 30, 40 indoor unit, 11 outdoor unit, 31 sample container, 41 packing box, 42, 43 buffer, 100, 200, 300 air conditioner, 311 body, 312 lid, 400 packing set, A1, A2, B1, B2 threshold, Ps1 main power, Ps2 auxiliary power, Rm remote controller, Spg sponge, s1, s21 refrigerant sensor, s2, s21 odor sensor.

Claims

A combustible refrigerant is an air conditioner that circulates in the order of a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger,
The compressor stores refrigerating machine oil and discharges the refrigerating machine oil together with the refrigerant,
The refrigerating machine oil circulates together with the refrigerant in the order of the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger.
The first heat exchanger is disposed in a first space;
The second heat exchanger is disposed in the second space,
The air conditioner
A first sensor for detecting the refrigerant in the first space;
A second sensor for detecting an odor of the refrigerating machine oil in the first space;
An air conditioner comprising: a control device that detects leakage of the refrigerant using a first detection signal from the first sensor and a second detection signal from the second sensor.
The control device is configured such that the first detection signal is greater than a first threshold, the second detection signal is greater than a second threshold, and the first detection signal is greater than a third threshold, and the second detection signal. The air conditioner according to claim 1, wherein leakage of the refrigerant is detected when the value is larger than a fourth threshold value.
The third threshold is smaller than the first threshold,
The air conditioner according to claim 2, wherein the fourth threshold value is smaller than the second threshold value.
The first sensor is supplied with power from a first power source,
The second sensor is supplied with power from a second power source,
The control device is supplied with power from the first power source,
The air conditioner according to claim 2 or 3, wherein when the second detection signal exceeds the second threshold, the second sensor notifies leakage of the refrigerant.
A combustible refrigerant is an air conditioner that circulates in the order of a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger,
The compressor stores refrigerating machine oil and discharges the refrigerating machine oil together with the refrigerant,
The refrigerating machine oil circulates together with the refrigerant in the order of the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger.
The first heat exchanger is disposed in a first space;
The second heat exchanger is disposed in the second space,
The air conditioner
A sensor for detecting the refrigerant in the first space;
A sample storage unit for storing the sample of the refrigerating machine oil and capable of releasing the odor of the sample to the outside;
An air conditioner comprising: a control device that detects leakage of the refrigerant using a detection signal from the sensor.
The air conditioner according to claim 5, wherein the sample storage unit is disposed in the first space.
The air conditioner according to any one of claims 1 to 6, wherein the first space is indoors.
The refrigerant includes R290,
The air conditioner according to any one of claims 1 to 7, wherein the refrigerating machine oil contains polyalkylene glycol.
A combustible refrigerant is a packaging set of an air conditioner in which a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger circulate in order,
During operation of the air conditioner,
The compressor stores refrigerating machine oil and discharges the refrigerating machine oil together with the refrigerant,
The refrigerating machine oil circulates together with the refrigerant in the order of the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger.
The first heat exchanger is disposed in a first space;
The second heat exchanger is disposed in the second space,
The air conditioner
A sensor for detecting the refrigerant in the first space;
Using a detection signal from the sensor, and a controller for detecting leakage of the refrigerant,
The packing set is
A sample of the refrigerating machine oil;
An air conditioner comprising: the compressor; the first heat exchanger; the expansion valve; the second heat exchanger; the sensor; and at least one of the control devices and a packaging box for containing the sample. Packing set.
The air conditioner packaging set according to claim 9, wherein at least the first heat exchanger and the sample are accommodated in the packaging box.
The air conditioner packaging set according to claim 9 or 10, wherein the first space is indoors.
The refrigerant includes R290,
The air conditioner packaging set according to any one of claims 9 to 11, wherein the refrigerating machine oil includes polyalkylene glycol.