WO2017110904A1 - 空気調和装置 - Google Patents
空気調和装置 Download PDFInfo
- Publication number
- WO2017110904A1 WO2017110904A1 PCT/JP2016/088168 JP2016088168W WO2017110904A1 WO 2017110904 A1 WO2017110904 A1 WO 2017110904A1 JP 2016088168 W JP2016088168 W JP 2016088168W WO 2017110904 A1 WO2017110904 A1 WO 2017110904A1
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- WIPO (PCT)
- Prior art keywords
- sensor
- refrigerant
- air
- opening
- heat exchanger
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/20—Casings or covers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/12—Inflammable refrigerants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
- F25B2500/222—Detecting refrigerant leaks
Definitions
- the present invention relates to an air conditioner provided with a sensor for detecting refrigerant leakage.
- Patent Document 1 describes an indoor unit of an air conditioner.
- This indoor unit has a heat exchange chamber and a machine room.
- a heat exchanger through which a combustible refrigerant flows is disposed in the heat exchange chamber.
- a drain pan for receiving and draining the condensed water generated in the heat exchanger is disposed in the lower part of the heat exchange chamber.
- the drain pan extends from the lower part of the heat exchange chamber toward the lower part of the machine room.
- a sensor for detecting a combustible refrigerant is disposed in the lower part of the machine room and in the vicinity of the drain pan. When the combustible refrigerant leaks from the heat exchanger, the combustible refrigerant is guided to the lower part of the machine room through the drain pan and detected by the sensor.
- Patent Document 2 describes a gas sensor.
- This gas sensor has a gas detection element and a frame that houses the gas detection element. A large number of air holes are formed in the frame to allow room air to flow toward the gas detection element.
- JP 2002-98346 A Japanese Utility Model Publication No. 63-27859
- the senor In the indoor unit described in Patent Document 1, the sensor is disposed in the vicinity of the drain pan. For this reason, when clogging occurs in the drainage path from the drain pan, the condensed water overflowing from the drain pan may hang down on the sensor.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an air conditioner that can prevent a sensor that detects leakage of refrigerant from getting wet with water.
- An air conditioner includes a refrigerant circuit that circulates a refrigerant, and an indoor unit that houses at least a load-side heat exchanger of the refrigerant circuit.
- the indoor unit includes a housing and the housing A drain pan that receives the condensed water generated in the load-side heat exchanger, and a refrigerant detector that is provided in the casing and below the drain pan, and the refrigerant detector is A sensor for detecting leakage of the refrigerant, a sensor cover for covering the sensor from the front side of the sensor, and a mounting plate disposed on the back side of the sensor, wherein the sensor cover includes the sensor A roof portion disposed above the roof portion, and a side portion disposed below the roof portion and on the front surface side or the side surface side of the sensor.
- the eaves that protrudes outside The side surface portion is formed with at least one first opening for introducing air into the sensor cover, and the mounting plate has a slit into which one end of the roof portion is inserted. Is formed.
- FIG. 1 It is a refrigerant circuit diagram which shows schematic structure of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a front view which shows the external appearance structure of the indoor unit 1 of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a front view which shows typically the internal structure of the indoor unit 1 of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a side view which shows typically the internal structure of the indoor unit 1 of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the refrigerant
- FIG. 6 is a cross-sectional view showing a VI-VI cross section of FIG. 5. It is a figure which shows the example of the attachment attitude
- FIG. 1 is a refrigerant circuit diagram illustrating a schematic configuration of the air-conditioning apparatus according to the present embodiment.
- the dimensional relationship and shape of each component may differ from the actual ones.
- the air conditioner has a refrigerant circuit 40 for circulating the refrigerant.
- the refrigerant circuit 40 includes a compressor 3, a refrigerant flow switching device 4, a heat source side heat exchanger 5 (for example, an outdoor heat exchanger), a decompression device 6, and a load side heat exchanger 7 (for example, an indoor heat exchanger).
- the air conditioning apparatus has the outdoor unit 2 installed, for example, outdoors as a heat source unit.
- the air conditioner has, for example, an indoor unit 1 installed indoors as a load unit.
- the indoor unit 1 and the outdoor unit 2 are connected via extension pipes 10a and 10b that are part of the refrigerant pipe.
- a slightly flammable refrigerant such as HFO-1234yf or HFO-1234ze, or a strong flammable refrigerant such as R290 or R1270 is used.
- These refrigerants may be used as a single refrigerant, or may be used as a mixed refrigerant in which two or more kinds are mixed.
- a refrigerant having a flammability that is equal to or higher than the slight combustion level (for example, 2 L or more in the ASHRAE 34 classification) may be referred to as a “flammable refrigerant”.
- non-combustible refrigerants such as R22 and R410A (for example, 1 in the classification of ASHRAE 34) may be used. These refrigerants have, for example, higher density than air under atmospheric pressure.
- the compressor 3 is a fluid machine that compresses sucked low-pressure refrigerant and discharges it as high-pressure refrigerant.
- the refrigerant flow switching device 4 switches the flow direction of the refrigerant in the refrigerant circuit 40 between the cooling operation and the heating operation.
- a four-way valve is used as the refrigerant flow switching device 4.
- the heat source side heat exchanger 5 is a heat exchanger that functions as a radiator (for example, a condenser) during cooling operation and functions as an evaporator during heating operation. In the heat source side heat exchanger 5, heat exchange is performed between the refrigerant circulating in the interior and the outdoor air supplied by an outdoor air blowing fan 5f described later.
- the decompression device 6 decompresses the high-pressure refrigerant into a low-pressure refrigerant.
- an electronic expansion valve whose opening degree can be adjusted is used.
- the load-side heat exchanger 7 is a heat exchanger that functions as an evaporator during cooling operation and functions as a radiator (for example, a condenser) during heating operation. In the load-side heat exchanger 7, heat exchange is performed between the refrigerant circulating in the interior and the air supplied by the indoor blower fan 7 f described later.
- the cooling operation is an operation for supplying a low-temperature and low-pressure refrigerant to the load-side heat exchanger 7
- the heating operation is an operation for supplying a high-temperature and high-pressure refrigerant to the load-side heat exchanger 7. It is.
- a compressor 3, a refrigerant flow switching device 4, a heat source side heat exchanger 5 and a pressure reducing device 6 are accommodated.
- the outdoor unit 2 accommodates an outdoor blower fan 5 f that supplies outdoor air to the heat source side heat exchanger 5.
- the outdoor fan 5f is installed to face the heat source side heat exchanger 5. By rotating the outdoor fan 5f, an air flow passing through the heat source side heat exchanger 5 is generated.
- a propeller fan is used as the outdoor blower fan 5f.
- the outdoor fan 5f is arranged, for example, on the downstream side of the heat source side heat exchanger 5 in the air flow generated by the outdoor fan 5f.
- the outdoor unit 2 includes a refrigerant pipe connecting the extension pipe connection valve 13a on the gas side during the cooling operation and the refrigerant flow switching device 4 as a refrigerant pipe, a suction pipe 11 connected to the suction side of the compressor 3, A discharge pipe 12 connected to the discharge side of the compressor 3, a refrigerant pipe connecting the refrigerant flow switching device 4 and the heat source side heat exchanger 5, a refrigerant pipe connecting the heat source side heat exchanger 5 and the decompression device 6, And the refrigerant
- the extension pipe connection valve 13a is a two-way valve that can be switched between open and closed, and a joint portion 16a (for example, a flare joint) is attached to one end thereof.
- the extension pipe connection valve 13b is a three-way valve that can be switched between open and closed.
- a service port 14a used for vacuuming which is a pre-operation for filling the refrigerant into the refrigerant circuit 40, is attached, and at the other end, a joint portion 16b (for example, a flare joint) ) Is attached.
- the high-temperature and high-pressure gas refrigerant compressed by the compressor 3 flows through the discharge pipe 12 during both the cooling operation and the heating operation.
- a low-temperature and low-pressure gas refrigerant or two-phase refrigerant that has undergone an evaporating action flows through the suction pipe 11 in both the cooling operation and the heating operation.
- a service port 14b with a low-pressure side flare joint is connected to the suction pipe 11, and a service port 14c with a flare joint on the high-pressure side is connected to the discharge pipe 12.
- the service ports 14b and 14c are used for measuring the operating pressure by connecting a pressure gauge at the time of trial operation during installation or repair of the air conditioner.
- the indoor unit 1 accommodates a load side heat exchanger 7. Further, the indoor unit 1 accommodates an indoor blower fan 7 f that supplies air to the load-side heat exchanger 7. By rotating the indoor blower fan 7f, an air flow passing through the load-side heat exchanger 7 is generated.
- a centrifugal fan for example, a sirocco fan, a turbo fan, etc.
- a cross flow fan for example, a diagonal fan
- an axial fan for example, a propeller fan
- the indoor blower fan 7f of this example is disposed on the upstream side of the load side heat exchanger 7 in the air flow generated by the indoor blower fan 7f, but is disposed on the downstream side of the load side heat exchanger 7. Also good.
- a joint portion 15a for example, a flare joint for connecting the extension piping 10a is provided at a connection portion with the extension piping 10a on the gas side.
- a joint part 15b for example, a flare joint for connecting the extension pipe 10b is provided in the connection part with the liquid side extension pipe 10b. It has been.
- the indoor unit 1 includes an intake air temperature sensor 91 that detects the temperature of the indoor air sucked from the room, and the liquid refrigerant at the inlet portion during the cooling operation of the load side heat exchanger 7 (the outlet portion during the heating operation).
- a heat exchanger liquid pipe temperature sensor 92 for detecting the temperature a heat exchanger two-phase pipe temperature sensor 93 for detecting the temperature (evaporation temperature or condensation temperature) of the two-phase refrigerant of the load side heat exchanger 7 and the like are provided. .
- Each of these temperature sensors 91, 92, 93 outputs a detection signal to the control unit 30 that controls the indoor unit 1 or the entire air conditioner.
- the control unit 30 includes a microcomputer (hereinafter sometimes referred to as “microcomputer”) including a CPU, ROM, RAM, I / O port, timer, and the like.
- the control unit 30 can perform data communication with the operation unit 26 (see FIG. 2).
- the operation unit 26 receives an operation by a user and outputs an operation signal based on the operation to the control unit 30.
- the control unit 30 of this example controls the operation of the indoor unit 1 or the entire air conditioner including the operation of the indoor blower fan 7f based on the operation signal from the operation unit 26, the detection signal from the sensors, and the like.
- the control unit 30 may be provided in the housing of the indoor unit 1 or may be provided in the housing of the outdoor unit 2.
- the control part 30 may be comprised by the outdoor unit control part provided in the outdoor unit 2, and the indoor unit control part provided in the indoor unit 1 and capable of data communication with the outdoor unit control part.
- a solid line arrow indicates the flow direction of the refrigerant during the cooling operation.
- the refrigerant flow path switching device 4 switches the refrigerant flow path as indicated by a solid line, and the refrigerant circuit 40 is configured so that the low-temperature and low-pressure refrigerant flows through the load-side heat exchanger 7.
- the high-temperature and high-pressure gas refrigerant discharged from the compressor 3 first flows into the heat source side heat exchanger 5 through the refrigerant flow switching device 4.
- the heat source side heat exchanger 5 functions as a condenser. That is, in the heat source side heat exchanger 5, heat exchange is performed between the refrigerant circulating in the interior and the outdoor air supplied by the outdoor blower fan 5f, and the condensation heat of the refrigerant is radiated to the outdoor air. Thereby, the refrigerant flowing into the heat source side heat exchanger 5 is condensed and becomes a high-pressure liquid refrigerant.
- the high-pressure liquid refrigerant flows into the decompression device 6 and is decompressed to become a low-pressure two-phase refrigerant.
- the low-pressure two-phase refrigerant flows into the load side heat exchanger 7 of the indoor unit 1 via the extension pipe 10b.
- the load side heat exchanger 7 functions as an evaporator. That is, in the load-side heat exchanger 7, heat exchange is performed between the refrigerant circulating in the interior and the air (for example, indoor air) supplied by the indoor fan 7f, and the evaporation heat of the refrigerant is absorbed from the air. .
- the refrigerant flowing into the load-side heat exchanger 7 evaporates to become a low-pressure gas refrigerant or a two-phase refrigerant. Further, the air supplied by the indoor blower fan 7f is cooled by the heat absorbing action of the refrigerant.
- the low-pressure gas refrigerant or two-phase refrigerant evaporated in the load side heat exchanger 7 is sucked into the compressor 3 via the extension pipe 10 a and the refrigerant flow switching device 4.
- the refrigerant sucked into the compressor 3 is compressed into a high-temperature and high-pressure gas refrigerant. In the cooling operation, the above cycle is repeated.
- the refrigerant flow path switching device 4 switches the refrigerant flow paths as indicated by dotted lines, and the refrigerant circuit 40 is configured so that the high-temperature and high-pressure refrigerant flows through the load-side heat exchanger 7.
- the refrigerant flows in the opposite direction to that during the cooling operation, and the load side heat exchanger 7 functions as a condenser.
- FIG. 2 is a front view showing an external configuration of the indoor unit 1 of the air-conditioning apparatus according to the present embodiment.
- FIG. 3 is a front view schematically showing the internal structure of the indoor unit 1 of the air-conditioning apparatus according to the present embodiment.
- FIG. 4 is a side view schematically showing the internal structure of the indoor unit 1 of the air-conditioning apparatus according to the present embodiment. The left side in FIG. 4 shows the front side (indoor space side) of the indoor unit 1.
- the indoor unit 1 a floor-standing indoor unit 1 installed on the floor surface of the indoor space serving as the air-conditioning target space is illustrated.
- the positional relationship (for example, vertical relationship etc.) between each structural member in the following description is a thing when installing the indoor unit 1 in the state which can be used in principle.
- the indoor unit 1 includes a casing 111 having a vertically long rectangular parallelepiped shape.
- a suction port 112 for sucking air in the indoor space is formed in the lower front portion of the housing 111.
- the suction port 112 of this example is provided below the center portion in the vertical direction of the casing 111 and at a position near the floor surface.
- the air sucked from the suction port 112 is blown out into the room.
- An outlet 113 is formed.
- An operation unit 26 is provided on the front surface of the casing 111 above the suction port 112 and below the air outlet 113.
- the operation unit 26 is connected to the control unit 30 via a communication line, and data communication with the control unit 30 is possible.
- an operation start operation, an operation end operation, an operation mode switching, a set temperature, a set air volume, and the like are performed by a user operation.
- the operation unit 26 is provided with a display unit, an audio output unit, or the like as a notification unit that notifies the user of information.
- the housing 111 is a hollow box, and a front opening is formed on the front surface of the housing 111.
- the casing 111 includes a first front panel 114a, a second front panel 114b, and a third front panel 114c that are detachably attached to the front opening.
- the first front panel 114a, the second front panel 114b, and the third front panel 114c all have a substantially rectangular flat plate-like outer shape.
- the first front panel 114a is detachably attached to the lower portion of the front opening of the casing 111.
- the suction port 112 is formed in the first front panel 114a.
- the second front panel 114b is disposed adjacent to and above the first front panel 114a, and is detachably attached to the central portion of the front opening of the housing 111 in the vertical direction.
- the operation unit 26 is provided on the second front panel 114b.
- the third front panel 114c is disposed adjacent to and above the second front panel 114b, and is detachably attached to the upper portion of the front opening of the housing 111.
- the above-described air outlet 113 is formed in the third front panel 114c.
- the internal space of the housing 111 is roughly divided into a lower space 115a that serves as a blower section and an upper space 115b that is located above the lower space 115a and serves as a heat exchange section.
- the lower space 115a and the upper space 115b are partitioned by the partition portion 20.
- the partition part 20 has a flat plate shape, for example, and is arranged substantially horizontally.
- the partition portion 20 is formed with at least an air passage opening 20a serving as an air passage between the lower space 115a and the upper space 115b.
- the lower space 115a is exposed to the front surface side by removing the first front panel 114a from the housing 111, and the upper space 115b is configured such that the second front panel 114b and the third front panel 114c are removed from the housing 111. By removing it, it is exposed to the front side. That is, the height at which the partition portion 20 is installed generally matches the height of the upper end of the first front panel 114a or the lower end of the second front panel 114b.
- the partition portion 20 may be formed integrally with a fan casing 108 described later, or may be formed integrally with a drain pan 21 described later, or separate from the fan casing 108 and the drain pan 21. It may be formed as a body.
- an indoor blower fan 7f that causes an air flow from the suction port 112 toward the blowout port 113 to be generated in the air passage 81 in the housing 111 is disposed.
- the indoor blower fan 7f of this example is a sirocco fan that includes a motor (not shown) and an impeller 107 that is connected to an output shaft of the motor and in which a plurality of blades are arranged, for example, at equal intervals in the circumferential direction.
- the rotating shaft of the impeller 107 is disposed so as to be substantially parallel to the depth direction of the casing 111.
- a motor that is not a brush type for example, an induction motor or a DC brushless motor
- the impeller 107 of the indoor fan 7f is covered with a spiral fan casing 108.
- the fan casing 108 is formed separately from the casing 111, for example.
- a suction opening 108 b that sucks room air into the fan casing 108 through the suction port 112 is formed.
- the suction opening 108 b is disposed so as to face the suction port 112.
- a blowout opening 108a for blowing out the blown air is formed.
- the blowout opening 108 a is arranged so as to face upward, and is connected to the upper space 115 b through the air passage opening 20 a of the partition part 20.
- blowout opening 108a communicates with the upper space 115b through the air passage opening 20a.
- the opening end of the outlet opening 108a and the opening end of the air passage opening 20a may be directly connected or indirectly connected via a duct member or the like.
- an electrical component box 25 in which a microcomputer, various electrical components, a substrate, and the like constituting the control unit 30 are accommodated is provided.
- the upper space 115b is located downstream of the lower space 115a in the air flow generated by the indoor blower fan 7f.
- the load side heat exchanger 7 is disposed in the air passage 81 in the upper space 115b.
- a drain pan 21 that receives condensed water condensed on the surface of the load side heat exchanger 7 is provided below the load side heat exchanger 7, a drain pan 21 that receives condensed water condensed on the surface of the load side heat exchanger 7 is provided below the load side heat exchanger 7, a drain pan 21 that receives condensed water condensed on the surface of the load side heat exchanger 7 is provided.
- the drain pan 21 may be formed as a part of the partition part 20, or may be formed separately from the partition part 20 and disposed on the partition part 20.
- the indoor pipes 9a and 9b connected to the load-side heat exchanger 7 pass through the partition portion 20 and are drawn downward from the upper space 115b to the lower space 115a.
- a joint portion 15a that connects the indoor pipe 9a and the extension pipe 10a and a joint portion 15b that connects the indoor pipe 9b and the extension pipe 10b are disposed in the lower space 115a.
- the indoor pipes 9a and 9b, the extension pipes 10a and 10b, and the joint portions 15a and 15b are disposed on one side (right side in FIG. 3) in the left-right direction of the indoor unit 1.
- a refrigerant detector 99 that detects refrigerant leakage is provided.
- the refrigerant detection unit 99 detects the refrigerant concentration in the air around the refrigerant detection unit 99 and outputs a detection signal to the control unit 30.
- the presence or absence of refrigerant leakage is determined based on the detection signal from the refrigerant detection unit 99.
- a gas sensor for example, a semiconductor gas sensor, a hot-wire semiconductor gas sensor, or the like.
- coolant detection part 99 is provided below the load side heat exchanger 7, the drain pan 21, and the coupling parts 15a and 15b, for example.
- the leakage of the refrigerant may occur in the brazed portion and the joint portions 15a and 15b of the load side heat exchanger 7. Therefore, when a refrigerant having a density higher than that of air is used under atmospheric pressure, the refrigerant detector 99 is provided below the load side heat exchanger 7 and the joints 15a and 15b, so that the refrigerant can be more reliably leaked. Can be detected.
- the refrigerant detector 99 is attached along any one of the left side, the back, and the right side of the inner wall surface of the casing 111. Since the first front panel 114a is attached and detached when the indoor unit 1 is installed, the refrigerant detection unit 99 is attached to a portion other than the front surface of the inner wall surface of the housing 111. Moreover, the refrigerant
- coolant detection part 99 is the other side (in FIG. 3, in the left-right direction of the indoor unit 1) which is a reverse direction with the arrangement position of indoor piping 9a, 9b, extension piping 10a, 10b, and joint part 15a, 15b. It is arranged on the left. Thereby, the manageability of extension piping 10a and 10b is securable.
- the joint portions 15a and 15b and the surrounding pipes are covered with a heat insulating material after the indoor pipes 9a and 9b and the extension pipes 10a and 10b are connected by the installer of the indoor unit 1.
- a gap may be generated in the heat insulating material, which may cause condensation in the joint portions 15a and 15b and the surrounding piping.
- the refrigerant detection unit 99 is in the lower space 115a and has the same height as or lower than the height of the opening lower end 112a of the suction port 112 and the same height as or higher than the height of the bottom surface portion 111a of the housing 111. It is provided within the range (see FIG. 4).
- the opening lower end 112 a of the suction port 112 is located above the bottom surface portion 111 a of the housing 111.
- coolant detection part 99 is arrange
- a part of the refrigerant detection unit 99 may be provided above the height range. Good.
- a small-volume recess having an upper opening is formed in the height range.
- the control unit 30 starts from the refrigerant detecting unit 99. Based on the detection signal, refrigerant leakage is detected.
- the control part 30 starts the driving
- the rotation speed of the indoor blower fan 7f is not limited to the rotation speed used in normal operation, and may be a dedicated rotation speed that can sufficiently diffuse the refrigerant even if the refrigerant leakage amount is maximum.
- the rotation time of the indoor blower fan 7f is a time during which all the refrigerant can be diffused even if the maximum amount of refrigerant that may be enclosed in the air conditioner continues to leak at the minimum leakage rate that forms a flammable concentration. May be.
- control unit 30 may notify the user that the refrigerant has leaked by using a display unit, an audio output unit, or the like provided in the operation unit 26. Good. Further, the controller 30 may forcibly stop or prohibit the start of the compressor 3 when detecting leakage of the refrigerant.
- FIG. 5 is a diagram illustrating a configuration of the refrigerant detection unit 99 of the air-conditioning apparatus according to the present embodiment.
- a front view (a) and a bottom view (b) of the refrigerant detector 99 are shown together.
- FIG. 6 is a cross-sectional view showing a VI-VI cross section of FIG. FIG. 6 also shows the configuration of the mounting base 240 on the side of the casing 111 to which the refrigerant detection unit 99 is mounted.
- the front side of FIG. 5A, the upper side of FIG. 5B, and the right side of FIG. 6 represent the front side of the sensor 200.
- 5B, the lower side of FIG. 5B, and the left side of FIG. 6 represent the back side of the sensor 200.
- the front side of the sensor 200 and the back side of the sensor 200 may be simply referred to as “front side” and “back side”.
- the refrigerant detection unit 99 is attached to the back side (that is, the rear panel) of the inner wall surface of the casing 111, the front side direction and the back side direction of the sensor 200 The direction on the front side and the direction on the back side of the machine 1 are the same.
- the front side direction and the back side direction of the sensor 200 may not match the front side direction and the back side direction of the indoor unit 1, respectively.
- the refrigerant detection unit 99 covers the sensor 200, the mounting plate 220 disposed on the back side of the sensor 200, the sensor 200 from the front side, and surrounds the sensor 200 together with the mounting plate 220. And a sensor cover 230.
- the refrigerant detection unit 99 has a configuration in which the sensor 200, the mounting plate 220, and the sensor cover 230 are integrally assembled.
- the refrigerant detection unit 99 may be referred to as a sensor assembly.
- the refrigerant detector 99 is attached to an attachment base 240 provided on the back side of the inner wall surface of the casing 111.
- the sensor 200 includes a sensor element 201 (see FIG. 7), a substrate 210 on which the sensor element 201 is mounted, and a cylindrical container 202 that houses the sensor element 201.
- the substrate 210 In a state in which the refrigerant detection unit 99 is attached to the attachment base 240, the substrate 210 is arranged upright so that the substrate surface is substantially parallel to the vertical direction.
- the sensor element 201 is mounted on the front side of the substrate 210.
- the cylindrical container 202 is fixed to the front side of the substrate 210 so that the axial direction is perpendicular to the substrate 210.
- the rear surface side that is one axial end side of the cylindrical container 202 is in contact with the front surface of the substrate 210.
- An opening 203 (an example of a second opening) for introducing air into the cylindrical container 202 is formed on the front surface side which is the other axial end side of the cylindrical container 202.
- the sensor 200 is attached so that the axial direction of the cylindrical container 202 is horizontal and the opening 203 faces the horizontal direction.
- the opening 203 may be provided with a mesh part 204 (see FIG. 7) in order to prevent foreign matter from entering the cylindrical container 202.
- FIG. 7 is a diagram illustrating an example of the mounting posture of the sensor 200 in the air-conditioning apparatus according to the present embodiment.
- the sensor 200 is attached so that the opening 203 faces in the horizontal direction as in the configuration shown in FIGS.
- the sensor 200 is attached so that the opening 203 faces vertically downward.
- the sensor 200 is attached so that the opening 203 faces vertically upward.
- the sensor 200 is preferably mounted such that the opening 203 faces in the horizontal direction as shown in FIG. 7 (a) or the opening 203 faces down as shown in FIG. 7 (b).
- the downward direction includes not only a vertically downward direction but also an obliquely downward direction.
- the refrigerant having a density higher than that of air leaks, the refrigerant accumulates from the bottom of the casing 111. For this reason, the leakage of the refrigerant can be detected at an early stage by attaching the sensor 200 so that the opening 203 is directed horizontally or downward.
- the mounting plate 220 has a structure in which the upper end and the lower end of a rectangular sheet metal are each bent to the back side.
- the attachment plate 220 includes a flat plate portion 221 to which the substrate 210 is attached, an upper end portion 222 (an example of a locking portion) bent at an acute angle with respect to the flat plate portion 221, and a right angle with respect to the flat plate portion 221 on the back side. And a lower end portion 223 that is bent.
- the flat plate portion 221 In a state where the refrigerant detection unit 99 is attached to the attachment base 240, the flat plate portion 221 is disposed so as to be substantially parallel to the vertical direction.
- the flat plate part 221 supports the substrate 210 via a plurality of support members 224.
- a slit 225 into which one end of a roof portion 231 described later is inserted is formed above the portion of the flat plate portion 221 that supports the substrate 210.
- the sensor cover 230 is disposed below the sensor 200, a roof portion 231 disposed above the sensor 200, a side surface portion 232 disposed below the roof portion 231 and on the front and side surfaces of the sensor 200, and the sensor 200.
- the side surface portion 232 includes a front surface portion 232 a disposed on the front surface side of the sensor 200, a right side surface portion 232 b disposed on the right side surface of the sensor 200, and a left side surface portion 232 c disposed on the left side surface of the sensor 200. It is.
- the sensor cover 230 covers the sensor 200 from five directions other than the back side of the sensor 200. Thereby, the sensor cover 230 surrounds the sensor 200 from all directions together with the mounting plate 220 arranged on the back side of the sensor 200.
- the sensor cover 230 is made of, for example, resin.
- the roof portion 231 includes an eave portion 231a protruding outward from the front surface portion 232a (that is, the front surface side), an eave portion 231b protruding outward from the right side surface portion 232b (that is, the right side), and an outer side from the left side surface portion 232c. (That is, the eaves portion 231c protruding to the left).
- the roof portion 231 is inclined so that the height becomes lower toward the one end portion 231d which is the tip of the eave portion 231a.
- a dam portion 235 extending upward is formed at the other end portion 231e of the roof portion 231. The dam portion 235 and the end portion 231e are inserted into the slit 225 of the mounting plate 220 and are located on the back side of the mounting plate 220.
- the front portion 232a is formed with a plurality of openings 234a (an example of a first opening) for introducing air into the sensor cover 230 in order to ensure the detectability of the leaked refrigerant.
- a plurality of openings 234b (an example of a first opening) are formed in the right side surface 232b.
- a plurality of openings 234c are formed in the bottom surface portion 233.
- Each of the openings 234a, 234b, 234c has a slit-like opening shape.
- the roof 231 is not formed with an opening for introducing air into the sensor cover 230.
- openings 234a and 234b are formed in the front surface portion 232a and the right side surface portion 232b, which are the surfaces on the joint portions 15a and 15b side, of the side surface portion 232, respectively. For this reason, the leakage of the refrigerant from the joint portions 15a and 15b can be detected more reliably.
- the left side surface 232c which is the side wall side surface of the casing 111, of the side surface 232 has no opening, but the left side 232c may have an opening. Good.
- openings are formed in each of the side surface portion 232 (in this example, the front surface portion 232a and the right side surface portion 232b) and the bottom surface portion 233. For this reason, it is possible to prevent air or a gas having a lower density than air from staying in the sensor cover 230. For example, when leaked refrigerant having a density higher than that of air flows into the sensor cover 230 from the opening 234 c of the bottom surface portion 233, the side surface portion 232 uses air or a gas having a lower density than air existing in the sensor cover 230. From the openings 234a and 234b. Thereby, it is possible to prevent the detection of the leakage of the refrigerant from being delayed.
- the total opening area obtained by adding the opening areas of the openings 234a, 234b, and 234c is larger than the opening area of the opening 203 of the cylindrical container 202. From the viewpoint of preventing water from entering the inside of the sensor cover 230, it is desirable that the total opening area of the openings 234a, 234b, 234c is small. However, if the total opening area of the openings 234a, 234b, 234c is small, the detectability of the leaked refrigerant may be reduced. In the present embodiment, since the total opening area of the openings 234a, 234b, 234c is larger than the opening area of the opening 203, it is possible to prevent leakage of water while preventing water from entering the sensor cover 230. It is possible to prevent a decrease in detectability.
- the bottom surface portion 233 is formed with an insertion hole 236 opened downward.
- a lead wire 211 connected to the substrate 210 is inserted through the insertion hole 236.
- the lead wire 211 drawn out from the insertion hole 236 is supported by a lead wire support portion 226 provided on the mounting plate 220 and is directed upward toward the electrical component box 25 provided above the refrigerant detection portion 99. It extends.
- the lead wire 211 has a bent portion 211a bent in a U shape so as to protrude downward between a portion inserted through the insertion hole 236 and a portion supported by the lead wire support portion 226. Yes.
- the bent portion 211a is located below the insertion hole 236. Accordingly, it is possible to prevent water from entering the sensor cover 230 through the lead wire 211.
- the mounting base 240 has a structure in which an upper part and a lower part of a rectangular sheet metal are each bent in a Z shape. The two bent portions on the upper side are bent at an acute angle similarly to the upper end portion 222 of the mounting plate 220. Thereby, the mounting base 240 is formed with an inclined surface 241 (an example of a locked portion) that is inclined upward and has a lower height on the housing 111 side (rear panel side).
- the mounting base 240 is fixed to the back side of the inner wall surface of the casing 111 via, for example, a plurality of welds 242 by spot welding.
- the inclined surface 241 of the mounting base 240 and the lower surface of the upper end portion 222 of the mounting plate 220 are in surface contact. Thereby, a face seal is formed between the inclined surface 241 and the upper end 222.
- the mounting plate 220 is fixed to the mounting base 240 using a fastening member such as a screw 243.
- FIG. 8 is a diagram illustrating an example of a procedure for attaching the refrigerant detection unit 99 to the attachment base 240 in the air-conditioning apparatus according to the present embodiment.
- the refrigerant detection unit 99 has a configuration in which the sensor 200, the mounting plate 220, and the sensor cover 230 are integrally assembled before being attached to the mounting base 240.
- the refrigerant detection unit 99 is in contact with the mounting base 240 such that the lower surface of the upper end 222 of the mounting plate 220 and the inclined surface 241 of the mounting base 240 are in surface contact. Tentatively.
- coolant detection part 99 can be positioned with respect to the housing
- FIG. since the upper end portion 222 is bent at an acute angle with respect to the flat plate portion 221, the upper end portion 222 is locked to the mounting base 240. For this reason, it is possible to prevent the temporarily hung refrigerant detection unit 99 from falling from the mounting base 240.
- the refrigerant detection unit 99 temporarily hung on the mounting base 240 is then fixed to the mounting base 240 using a fastening member such as a screw 243.
- FIG. 9 is a diagram for explaining the effect of the refrigerant detection unit 99 in the air-conditioning apparatus according to the present embodiment.
- coolant detection part 99 is shown with the dotted-line arrow.
- a roof portion 231 of the sensor cover 230 is provided above the sensor 200. No opening is formed in the roof portion 231. Therefore, according to the present embodiment, even when water drops from above the refrigerant detection unit 99, the sensor 200 disposed below the roof portion 231 can be prevented from getting wet.
- the water 250 dripped on the roof portion 231 flows down on the roof portion 231 toward the eave portion 231a, and drops from the end portion 231d which is the front end of the eave portion 231a.
- the water 251 dripped to the back side from the flat plate part 221 of the mounting plate 220 flows down the upper end part 222 and the inclined surface 241 to the back side and is drained to the front side or the back side in FIG.
- the roof portion 231 has eave portions 231a and 231b protruding outward from the front surface portion 232a and the right side surface portion 232b.
- the water dripping from the front ends of the eaves portions 231a and 231b does not flow down along the front surface portion 232a and the right side surface portion 232b. For this reason, water does not enter the openings 234a and 234b. Therefore, according to this Embodiment, even if water dripped from the front-end
- the end portion 231e of the roof portion 231 is formed with a dam portion 235 extending upward on the back side from the mounting plate 220. Therefore, according to the present embodiment, it is possible to prevent water droplets falling through the casing 111 from entering the sensor cover 230.
- the insertion hole 236 is provided in the bottom surface portion 233 of the sensor cover 230, and the lead wire 211 drawn from the insertion hole 236 has a bent portion 211 a below the insertion hole 236. Yes. For this reason, even if a water droplet flows down through the lead wire 211, the water droplet drops downward at the bending portion 211a. Therefore, according to the present embodiment, the water droplets that flow down along the lead wire 211 do not enter the sensor cover 230 from the insertion hole 236, so that the refrigerant detection unit 99 can be prevented from getting wet.
- the refrigerant detection unit 99 is attached along any of the left side, the back, or the right side of the inner wall surface of the casing 111. Therefore, according to the present embodiment, it is possible to prevent the coolant detection unit 99 from getting wet even if some water accumulates at the bottom of the casing 111.
- the refrigerant detection unit 99 is provided in a recess in the bottom of the lower space 115a of the casing 111 and within the height range equal to or lower than the height of the opening lower end 112a of the suction port 112. ing. Therefore, according to the present embodiment, the refrigerant detector 99 can more reliably detect refrigerant leakage.
- openings 234a and 234b are formed in the front surface portion 232a and the right side surface portion 232b which are the surfaces on the joint portions 15a and 15b side of the sensor cover 230, respectively. For this reason, the refrigerant
- the total opening area obtained by adding the opening areas of the openings 234a, 234b, and 234c is larger than the opening area of the opening 203 of the cylindrical container 202. Therefore, according to the present embodiment, it is possible to prevent the leakage of the leaked refrigerant from being deteriorated while preventing water from entering the sensor cover 230.
- the senor 200 is attached so that the opening 203 is directed horizontally or downward. Therefore, according to the present embodiment, the leakage of the refrigerant can be detected at an early stage. Moreover, since it can prevent that a foreign material and water penetrate
- the upper end 222 of the mounting plate 220 is locked to the inclined surface 241 of the mounting base 240, so that the refrigerant detection unit 99 is attached to the mounting base 240. Can be temporarily provisioned. Therefore, according to the present embodiment, it is possible to improve workability when attaching the refrigerant detection unit 99 to the casing 111.
- FIG. An air conditioner according to Embodiment 2 of the present invention will be described.
- the gas sensor used for the sensor 200 of the refrigerant detection unit 99 not only detects refrigerant leakage but also erroneously detects foreign gas (gas other than refrigerant gas) sucked into the indoor unit 1 from the outside of the indoor unit 1. There is a risk that.
- the foreign gas includes propane or an insecticide.
- the air conditioner according to the present embodiment has a structure that can prevent erroneous detection of different gases.
- FIG. 10 is a cross-sectional view showing the configuration of the sensor 200 in the air-conditioning apparatus according to the present embodiment.
- symbol is attached
- a particulate adsorption filter 301 that adsorbs and removes a different gas is provided inside the cylindrical container 202 of the sensor 200 and between the opening 203 and the sensor element 201.
- the particulate adsorption filter 301 is provided between the mesh unit 204 provided in the opening 203 and the sensor element 201.
- a porous material such as silica gel or activated carbon is used.
- the fine particle adsorption filter 301 adsorbs not only different gases but also refrigerant gas. However, even if the particulate adsorption filter 301 is provided, the detection accuracy of the refrigerant leakage is not affected. The reason for this is as follows.
- the threshold value of the refrigerant concentration when determining the leakage of the refrigerant is, for example, about 3.6 wt% corresponding to 1/4 of LFL (14.4 vol%) of R32, % Order.
- the concentration of the different gas for example, butane or propane
- the concentration of the different gas is usually about 100 to 1000 ppm (0.01 to 0.1%), and is one order or several orders of magnitude smaller than the refrigerant concentration threshold. . Therefore, even if different gas and refrigerant gas are adsorbed to the particulate adsorption filter 301 at an adsorption rate that prevents erroneous detection of different gas, the detection accuracy of refrigerant leakage is not affected.
- the particulate adsorption filter 301 is provided between the mesh portion 204 and the sensor element 201, but the mesh portion 204 may be provided between the particulate adsorption filter 301 and the sensor element 201.
- the opening 203 faces vertically upward as in FIG. 7C, but the sensor 200 is the same as that shown in FIG. 7A or 7B.
- the opening 203 may be attached in an attachment posture such that the opening 203 faces in the horizontal direction or downward.
- FIG. 11 is a side view schematically showing the internal structure of the indoor unit 1 of the air-conditioning apparatus according to the present embodiment.
- symbol is attached
- the suction port 112 of the indoor unit 1 is provided with a particulate adsorption filter 302 that adsorbs and removes different gases.
- a particulate adsorption filter 302 for example, a porous material such as activated carbon or silica gel is used.
- Providing the particulate adsorption filter 302 makes it difficult for foreign gas outside the indoor unit 1 to enter the indoor unit 1. Thereby, since it becomes difficult for different gas to reach the sensor element 201, the possibility of erroneous detection of the different gas by the sensor 200 can be reduced. Further, even if the particulate adsorption filter 302 is provided for the same reason as described in the second embodiment, the detection accuracy of the refrigerant leakage is not affected.
- a dust collection filter may be provided in the suction port 112. That is, the fine particle adsorption filter 302 may be provided in place of a general dust collection filter provided at the suction port 112, or may be provided in addition to a general dust collection filter.
- the particulate adsorption filter 302 is provided at the suction port 112, but the particulate adsorption filter 302 may be provided on the air path from the suction port 112 to the sensor 200.
- the sensor 200 may erroneously detect the different gas that has entered the indoor unit 1 from the air outlet 113.
- a particulate adsorption filter similar to the particulate adsorption filter 302 may be provided at the air outlet 113.
- the particulate adsorption filter may be attached to and detached from the outlet 113 based on the operation of the indoor blower fan 7f.
- the indoor unit 1 includes an attachment / detachment mechanism configured to attach the particulate adsorption filter to the outlet 113 while the indoor blower fan 7f is stopped and to remove the particulate adsorption filter from the outlet 113 during operation of the indoor ventilation fan 7f. May be provided.
- the air-conditioning apparatus includes the refrigerant circuit 40 that circulates the refrigerant and the indoor unit 1 that houses at least the load-side heat exchanger 7 of the refrigerant circuit 40.
- the indoor unit 1 is provided in the casing 111, the drain 111 that receives the condensed water generated in the load-side heat exchanger 7, and is provided in the casing 111 below the drain pan 21.
- a refrigerant detection unit 99 includes a sensor 200 that detects refrigerant leakage, and a sensor cover 230 that covers the sensor 200 from the front side of the sensor 200.
- the sensor cover 230 includes a roof portion 231 disposed above the sensor 200 and a side surface portion 232 disposed below the roof portion 231 and on the front surface side or the side surface side of the sensor 200 (for example, the front surface portion 232a, the right side). A surface portion 232b).
- the roof portion 231 has eaves portions 231 a and 231 b that protrude outward from the side surface portion 232.
- the side surface portion 232 has at least one opening 234 a and 234 b for introducing air into the sensor cover 230.
- the sensor 200 can be prevented from getting wet even when water drops from above. Moreover, since the water dripped from the front ends of the eaves 231a and 231b does not flow down along the front surface 232a and the right side 232b, the water does not enter the openings 234a and 234b. Therefore, even if water drops from the front ends of the eaves 231a and 231b, the sensor 200 can be prevented from getting wet. Therefore, since the failure of the sensor 200 due to water wetting can be prevented, the safety of the air conditioner can be further improved. In addition, since air can be introduced into the sensor cover 230 through the opening, it is possible to ensure the detectability of the leaked refrigerant.
- the roof portion 231 may be inclined so that the height becomes lower toward the eave portion 231a side.
- the water dripped onto the roof portion 231 can flow down to the eave portion 231a side and be dripped from the front end of the eave portion 231a.
- the refrigerant detection unit 99 further includes a mounting plate 220 disposed on the back side of the sensor 200, and the mounting plate 220 includes one end ( For example, a slit 225 into which the end 231e) is inserted may be formed.
- a weir portion 235 extending upward may be formed at one end of the roof portion 231 and on the back side of the mounting plate 220.
- the attachment plate 220 is formed at the upper portion of the attachment plate 220 by being bent at an acute angle on the back side, and is provided with a locked portion (for example, A locking portion (for example, the upper end portion 222) that is locked to the inclined surface 241) of the mounting base 240 may be provided.
- the refrigerant detection unit 99 can be temporarily hung on the casing 111 (for example, the mounting base 240), workability when the refrigerant detection unit 99 is attached to the casing 111 is improved. Can do.
- the bottom surface portion 233 of the sensor cover 230 is formed with an insertion hole 236 through which the lead wire 211 connected to the sensor 200 is inserted.
- a bent portion 211 a that protrudes downward may be provided below the insertion hole 236.
- the casing 111 is disposed above the suction port 112 and the suction port 112 that sucks indoor air, and the air sucked from the suction port 112 is placed indoors.
- coolant detection part 99 may be provided in the height range which is the same as the opening lower end 112a of the suction inlet 112, or lower than it.
- a small volume recess having an upper opening is formed in the height range in the casing 111.
- a very small part of the leaked refrigerant stays in this recess without flowing out of the casing 111. Therefore, by providing the refrigerant detection unit 99 within the height range in the casing 111, it is possible to more reliably detect refrigerant leakage.
- the senor 200 includes the sensor element 201, the substrate 210 on which the sensor element 201 is mounted, and the cylindrical container 202 that houses the sensor element 201.
- One end side of the cylindrical container 202 in the axial direction is in contact with the surface of the substrate 210, and the other end side of the cylindrical container 202 in the axial direction has an opening 203 for introducing air into the cylindrical container 202.
- the sensor 200 may be arranged so that the opening 203 faces in the horizontal direction or downward.
- the leakage of the refrigerant can be detected at an early stage, and foreign matter and water can be prevented from entering the sensor 200.
- the total opening area of the openings 234a, 234b, and 234c formed in the sensor cover 230 may be larger than the opening area of the opening 203 of the sensor 200.
- the particulate adsorption filter 301 is provided between the opening 203 (an example of the second opening) and the sensor element 201 in the cylindrical container 202. May be.
- the housing 111 may be provided with a suction port 112 for sucking indoor air, and the suction port 112 may be provided with a particulate adsorption filter 302. .
- a floor-standing indoor unit has been exemplified as the indoor unit 1, but the present invention can be applied to other indoor units such as a ceiling cassette type, a ceiling-embedded type, a ceiling-suspended type, and a wall-mounted type. Is also applicable.
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Abstract
Description
本発明の実施の形態1に係る空気調和装置について説明する。図1は、本実施の形態に係る空気調和装置の概略構成を示す冷媒回路図である。なお、図1を含む以下の図面では、各構成部材の寸法の関係や形状等が実際のものとは異なる場合がある。
本発明の実施の形態2に係る空気調和装置について説明する。冷媒検知部99のセンサ200に用いられるガスセンサは、冷媒の漏洩を検知するだけでなく、室内機1の外部から室内機1内に吸い込まれた異ガス(冷媒ガス以外のガス)を誤検知してしまうおそれがある。異ガスには、プロパン又は殺虫剤などが含まれる。本実施の形態に係る空気調和装置は、異ガスを誤検知してしまうのを防止できる構造を有している。
本発明の実施の形態3に係る空気調和装置について説明する。本実施の形態に係る空気調和装置は、実施の形態2と同様に、異ガスを誤検知してしまうのを防止できる構造を有している。図11は、本実施の形態に係る空気調和装置の室内機1の内部構造を模式的に示す側面図である。なお、実施の形態1又は2と同一の機能及び作用を有する構成要素については、同一の符号を付してその説明を省略する。
本発明は、上記実施の形態に限らず種々の変形が可能である。
例えば、上記実施の形態では、室内機1として床置形の室内機を例に挙げたが、本発明は、天井カセット形、天井埋込形、天吊形、壁掛形等の他の室内機にも適用できる。
Claims (10)
- 冷媒を循環させる冷媒回路と、
少なくとも前記冷媒回路の負荷側熱交換器を収容する室内機と、を備え、
前記室内機は、
筐体と、
前記筐体内に設けられ、前記負荷側熱交換器で発生する凝縮水を受けるドレンパンと、
前記筐体内であって前記ドレンパンよりも下方に設けられた冷媒検知部と、を有しており、
前記冷媒検知部は、
冷媒の漏洩を検知するセンサと、
前記センサを当該センサの前面側から覆うセンサカバーと、
前記センサの背面側に配置された取付け板と、を有しており、
前記センサカバーは、
前記センサの上方に配置された屋根部と、
前記屋根部よりも下方であって前記センサの前面側又は側面側に配置された側面部と、を有しており、
前記屋根部は、前記側面部よりも外側にせり出した軒部を有しており、
前記側面部には、前記センサカバーの内部に空気を導入する少なくとも1つの第1開口部が形成されており、
前記取付け板には、前記屋根部の一端が挿入されるスリットが形成されている空気調和装置。 - 前記屋根部の一端であって前記取付け板よりも背面側には、上向きに延びた堰部が形成されている請求項1に記載の空気調和装置。
- 前記取付け板の上部には、前記取付け板が背面側に鋭角に屈曲して形成され、前記筐体に設けられた被係止部に係止される係止部が設けられている請求項1又は請求項2に記載の空気調和装置。
- 冷媒を循環させる冷媒回路と、
少なくとも前記冷媒回路の負荷側熱交換器を収容する室内機と、を備え、
前記室内機は、
筐体と、
前記筐体内に設けられ、前記負荷側熱交換器で発生する凝縮水を受けるドレンパンと、
前記筐体内であって前記ドレンパンよりも下方に設けられた冷媒検知部と、を有しており、
前記冷媒検知部は、
冷媒の漏洩を検知するセンサと、
前記センサを当該センサの前面側から覆うセンサカバーと、を有しており、
前記センサカバーは、
前記センサの上方に配置された屋根部と、
前記屋根部よりも下方であって前記センサの前面側又は側面側に配置された側面部と、を有しており、
前記屋根部は、前記側面部よりも外側にせり出した軒部を有しており、
前記側面部には、前記センサカバーの内部に空気を導入する少なくとも1つの第1開口部が形成されており、
前記センサカバーの底面部には、前記センサに接続されたリード線が挿通される挿通孔が形成されており、
前記リード線は、下方に凸となる曲げ部を前記挿通孔よりも下方に有している空気調和装置。 - 冷媒を循環させる冷媒回路と、
少なくとも前記冷媒回路の負荷側熱交換器を収容する室内機と、を備え、
前記室内機は、
筐体と、
前記筐体内に設けられ、前記負荷側熱交換器で発生する凝縮水を受けるドレンパンと、
前記筐体内であって前記ドレンパンよりも下方に設けられた冷媒検知部と、を有しており、
前記冷媒検知部は、
冷媒の漏洩を検知するセンサと、
前記センサを当該センサの前面側から覆うセンサカバーと、を有しており、
前記センサカバーは、
前記センサの上方に配置された屋根部と、
前記屋根部よりも下方であって前記センサの前面側又は側面側に配置された側面部と、を有しており、
前記屋根部は、前記側面部よりも外側にせり出した軒部を有しており、
前記側面部には、前記センサカバーの内部に空気を導入する少なくとも1つの第1開口部が形成されており、
前記センサは、
センサ素子と、
前記センサ素子が実装された基板と、
前記センサ素子を収容する筒状容器と、を有しており、
前記筒状容器の軸方向一端側は、前記基板の表面に当接しており、
前記筒状容器の軸方向他端側には、前記筒状容器の内部に空気を導入する第2開口部が形成されており、
前記センサは、前記第2開口部が水平方向又は下方を向くように配置されている空気調和装置。 - 前記筒状容器の内部のうち前記第2開口部と前記センサ素子との間には、微粒子吸着フィルターが設けられている請求項5に記載の空気調和装置。
- 前記少なくとも1つの第1開口部の開口面積は、前記第2開口部の開口面積よりも大きい請求項5又は請求項6に記載の空気調和装置。
- 前記屋根部は、前記軒部側ほど高さが低くなるように傾斜している請求項1~請求項7のいずれか一項に記載の空気調和装置。
- 前記筐体には、室内の空気を吸い込む吸込口が形成されており、
前記吸込口には、微粒子吸着フィルターが設けられている請求項1~請求項8のいずれか一項に記載の空気調和装置。 - 前記筐体には、室内の空気を吸い込む吸込口と、前記吸込口よりも上方に配置され、前記吸込口から吸い込まれた空気を室内に吹き出す吹出口と、が形成されており、
前記冷媒検知部は、前記吸込口の開口下端の高さと同一又はそれより低い高さ範囲内に設けられている請求項1~請求項8のいずれか一項に記載の空気調和装置。
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