CN210463267U - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- CN210463267U CN210463267U CN201890000177.3U CN201890000177U CN210463267U CN 210463267 U CN210463267 U CN 210463267U CN 201890000177 U CN201890000177 U CN 201890000177U CN 210463267 U CN210463267 U CN 210463267U
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- China
- Prior art keywords
- refrigerant
- air conditioner
- pipe
- detection sensor
- indoor
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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
Abstract
The utility model discloses an air conditioner has the structure that will connect the extension piping that connects in the extension piping of indoor set and connect in the off-premises station and connect through the joint part. The air conditioner is provided with: a heat insulator which covers the connection pipe to insulate heat, one end of which is positioned in the chamber, and the other end of which extends to a position covering the joint member; a refrigerant detection sensor that detects a refrigerant; and a control device that detects the presence or absence of refrigerant leakage based on a detection result of the refrigerant detection sensor. The connection pipe is connected to a heat transfer pipe of an indoor heat exchanger disposed in the indoor unit, and a refrigerant detection sensor is attached to a pipe portion extending from the heat insulator or a structure around the pipe portion on the indoor heat exchanger side.
Description
Technical Field
The utility model relates to an air conditioner that possesses refrigerant detection sensor.
Background
In a wall-mounted air conditioner, an insertion pipe integral with an indoor unit is provided through a wall, and a connection pipe connected to the indoor unit passes through the insertion pipe and extends to the outside. The outdoor end of the connection pipe drawn out to the outside of the room is fastened to an extension pipe connected to the outdoor unit by a flare fitting. Since the flare joint is attached by manual work, refrigerant leaks from the flare joint when the fastening is loose.
Therefore, there has been an air conditioner in which a refrigerant detection sensor is provided inside an insertion tube (see, for example, patent document 1). In patent document 1, when a refrigerant detection sensor detects a refrigerant, a blower fan that blows air to a heat exchanger mounted in an indoor unit is operated to agitate the air in the room to reduce the refrigerant concentration.
Patent document 1: japanese patent laid-open publication No. 2015-42930
In patent document 1, the refrigerant detection sensor is provided in the insertion tube, but the insertion tube is provided through the wall and is provided in a portion that communicates the indoor space and the outdoor space. Therefore, the refrigerant detection sensor provided in the insertion tube cannot be said to be able to quickly detect the refrigerant leakage in the room.
In addition, refrigerant leakage in the air conditioner also occurs from the brazing positions of the heat transfer tubes and the connecting pipes of the indoor heat exchanger. However, since the brazing position is located indoors, the refrigerant detection sensor of patent document 1 has a problem in that it cannot detect refrigerant leakage from the brazing position.
SUMMERY OF THE UTILITY MODEL
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 capable of quickly detecting leakage of refrigerant in a room.
The utility model discloses an air conditioner is connected in the extension piping of indoor set and the air conditioner that is connected in the extension piping of outdoor unit and connects through the joint part, and this air conditioner possesses: a heat insulator for covering the connection pipe to insulate heat, one end of the heat insulator being positioned in the room and the other end of the heat insulator extending to a position covering the joint member, and a refrigerant detection sensor for detecting the refrigerant; and a control device for detecting the presence or absence of refrigerant leakage based on a detection result of the refrigerant detection sensor, wherein the connection pipe is connected to a heat transfer pipe of an indoor heat exchanger disposed in the indoor unit, and the refrigerant detection sensor is attached to a pipe portion extending from the heat insulator or a structure around the pipe portion on the indoor heat exchanger side.
Preferably, the control device stops the operation of the air conditioner when the refrigerant leakage is detected.
Preferably, the air conditioner further includes an air discharge device for discharging indoor air to the outside, and the control device drives the air discharge device when detecting a refrigerant leak.
Preferably, an insertion pipe through which the connection pipe or the extension pipe passes is provided to penetrate a wall, and the exhaust device is a fan and is attached to an outdoor side outlet of the insertion pipe.
According to the present invention, since the refrigerant detection sensor is attached to the piping portion extending from the indoor side end of the heat insulator in the connection piping or the structure around the piping portion, the refrigerant leakage into the room can be detected quickly.
Drawings
Fig. 1 is an explanatory view of the mounting position of a refrigerant detection sensor of an air conditioner according to embodiment 1 of the present invention.
Fig. 2 is a schematic cross-sectional view of a main part of an air conditioner according to embodiment 1 of the present invention.
Fig. 3 is a block diagram showing a configuration of an air conditioner according to embodiment 1 of the present invention.
Fig. 4 is a perspective view of an indoor unit of an air conditioner according to embodiment 1 of the present invention.
Fig. 5 is a flowchart showing a flow of an operation of the air conditioner according to embodiment 1 of the present invention.
Detailed Description
Embodiment 1.
Fig. 1 is an explanatory view of the mounting position of a refrigerant detection sensor of an air conditioner according to embodiment 1 of the present invention. Fig. 2 is a schematic cross-sectional view of a main part of an air conditioner according to embodiment 1 of the present invention.
The air conditioner includes an indoor heat exchanger 1a in an indoor unit 1, and a connection pipe 2 having one end connected to the indoor heat exchanger 1a penetrates a wall W and is pulled out to the outside. The other end of the connection pipe 2 is connected to an extension pipe 3 connected to an outdoor heat exchanger (not shown) in the outdoor unit 10 via a joint member 4. The joint member 4 is formed of, for example, a flare joint. One end of the connection pipe 2 is connected to an end of the heat transfer pipe 1aa of the indoor heat exchanger 1a by brazing.
An insertion pipe 11 is provided to penetrate the wall W, and the connection pipe 2 is drawn out to the outside through the insertion pipe 11 while being surrounded by the cylindrical heat insulator 5 together with a drain hose (not shown). A housing case 13 for housing the exhaust device 12 is attached to the outdoor side outlet 11a of the insertion pipe 11 from the outdoor side. The exhaust device 12 is a fan that sucks air inside the chamber and blows the air to the outside of the chamber, and includes: a motor 12a, and a blade 12b driven by the motor 12a to direct the wind from the indoor to the outdoor. The heat insulator 5 is densely arranged in the insertion tube 11, and a gap for communicating the inside and the outside of the room is small. Therefore, the pressure loss of the gas flow passing through the insertion tube 11 is large. Therefore, for the motor 12a, a motor that overcomes this pressure loss and can obtain an output that forms a sufficient airflow within the insertion tube 11 is selected.
The length of the insertion tube 11 corresponds to the depth of the wall W. The diameter of the insertion pipe 11 is such that the heat insulator 5 and the drain hose (not shown) surrounding the connection pipe 2 smoothly pass therethrough. The insertion pipe 11 is not a special member, and is used when an air conditioner is installed in a general household.
One end of the heat insulator 5 covering the connection pipe 2 is located in the room, and the other end extends to the installation position of the joint member 4 and surrounds the joint member 4 and a part of the extension pipe 3. Therefore, when the refrigerant leaks from the joint member 4, the leaked refrigerant passes through the inside of the heat insulator 5 and moves to the indoor unit 1 side and the outdoor unit 10 side, respectively. The refrigerant that has moved toward the indoor unit 1 leaks into the room from the indoor end 5a of the heat insulator 5. Fig. 1 shows a state in which the joint member 4 and the extension pipe 3 are cut off along the way of the heat insulator 5. In fig. 1, the connection pipe 2 extends from the indoor to the outdoor, and the joint member 4 is located outdoors, but the extension pipe 3 may extend into the indoor and connect the connection pipe 2 and the extension pipe 3 to each other in the indoor.
As a characteristic configuration of embodiment 1, a refrigerant detection sensor 14 for detecting a refrigerant is attached to a region near the indoor side end 5a, specifically, to a portion of the connection pipe 2 extending from the indoor side end 5a of the heat insulator 5. The refrigerant detection sensor 14 is attached by, for example, a clip. The refrigerant detection sensor 14 may be disposed in the vicinity of the indoor-side end 5a, and the object to which the refrigerant detection sensor 14 is attached is not necessarily limited to the connection pipe 2. For example, in the case where a structure around the portion of the connection pipe 2 extending from the indoor side end 5a of the heat insulator 5, for example, a mounting panel on which a control board is disposed, exists in the casing of the indoor unit 1 in a place where the refrigerant detection sensor 14 is mounted in the vicinity of the indoor side end 5a, the structure may be mounted.
The above-described mounting position of the refrigerant detection sensor 14 can be said to be a position where the leaked refrigerant passes through the inside of the heat insulator 5 and leaks into the room. Therefore, by installing the refrigerant detection sensor 14 at the above-described position, the refrigerant leakage can be detected quickly. In addition, in the air conditioner, as a position where refrigerant leakage occurs, there is a brazing position between the heat transfer tubes 1aa of the indoor heat exchanger 1a and the connection pipes 2. The refrigerant detection sensor 14 attached to the above-described position can detect the refrigerant leakage from the brazing position at an early stage.
The refrigerant detection sensor 14 is specifically constituted by a contact combustion type sensor, a semiconductor type sensor, or the like. The refrigerant detection sensor 14 is connected to a wiring so as to be driven when the circuit breaker is turned on even while the air conditioner is stopped, in order to constantly monitor the leakage of the refrigerant.
During the cooling operation, the connection pipe 2 has a dew-point temperature or lower, and condensed water is generated on the pipe surface. Therefore, the refrigerant detection sensor 14 is preferably of a waterproof standard. However, if the refrigerant detection sensor 14 does not come into contact with the condensed water on the pipe surface, the refrigerant detection sensor 14 does not need to have a waterproof specification.
Fig. 3 is a block diagram showing a configuration of an air conditioner according to embodiment 1 of the present invention. Fig. 4 is a perspective view of an indoor unit of an air conditioner according to embodiment 1 of the present invention.
The air conditioner includes a control device 20 for controlling the entire air conditioner, and the refrigerant detection sensor 14, the exhaust device 12, and the notification device 15 are connected to the control device 20. Fig. 4 shows a specific arrangement of the control device 20, the refrigerant detection sensor 14, and the notification device 15 in the indoor unit 1. The notification device 15 is a device for notifying a user of leakage of the refrigerant. As the notification device 15, for example, an operation display lamp of the indoor unit 1 may be used, and the operation display lamp may be blinked a plurality of times to notify of refrigerant leakage. When the operation indicator lamp is used as the notification device 15, the conventional configuration can be replaced with the notification device 15, and it is not necessary to newly provide the notification device 15. As the notification device 15, for example, a buzzer or the like may be used.
The control device 20 determines the presence or absence of refrigerant leakage based on the detection result of the refrigerant detection sensor 14. Specifically, the control device 20 compares the detection voltage from the refrigerant detection sensor 14 with a preset threshold voltage, and determines that there is refrigerant leakage when the detection voltage exceeds the threshold voltage, and determines that there is no refrigerant leakage when the detection voltage is less than the threshold voltage. The control device 20 controls the exhaust device 12 and the notification device 15 based on the presence or absence of refrigerant leakage. The control device 20 may be configured by hardware such as a circuit device for realizing the function, or may be configured by an arithmetic device such as a microcomputer or a CPU and software to be executed thereon. Fig. 4 shows a configuration in which the control device 20 is disposed inside the indoor unit 1, but may be disposed outside the indoor unit 1.
In order to cause the refrigerant detection sensor 14 to be interlocked with the operation of the air conditioner, a signal processing circuit from the refrigerant detection sensor 14 may be disposed on a control board (not shown) mounted on the indoor unit 1. Further, the control device 20 sends a drive signal to the motor 12a of the exhaust device 12. Therefore, the drive circuit of the motor 12a is preferably disposed on a control board (not shown) mounted on the indoor unit 1, similarly to the signal processing circuit of the refrigerant detection sensor 14. The driving circuit of the motor 12a may be provided on a control board in the outdoor unit 10 or may be built in the motor 12a depending on the space.
Fig. 5 is a flowchart showing an operation flow of an air conditioner according to embodiment 1 of the present invention.
Regardless of whether the air conditioner is powered on or off, the refrigerant detection sensor 14 and the control device 20 are both supplied with power and driven (step S1), and the detection voltage of the refrigerant detection sensor 14 is input to the control device 20. The control device 20 determines whether or not the detection voltage from the refrigerant detection sensor 14 exceeds a predetermined threshold voltage (step S2), determines that there is refrigerant leakage when the detection voltage exceeds the threshold voltage, and performs the following control of steps S3 to S5.
(step S3) the control device 20 stops the operation of the air conditioner. That is, when the compressor (not shown) and the motor 12a of the air conditioner are in operation, the control device 20 sends stop signals to them.
(step S4) the control device 20 drives the exhaust device 12.
(step S5) the control device 20 notifies the outside of the leakage of the refrigerant by the notification device 15.
When the detected voltage becomes equal to or lower than the threshold voltage by driving the exhaust device 12, the control device 20 stops the operation of the exhaust device 12 (step S6). It is preferable that the operation of the exhaust device 12 is stopped after the leaked refrigerant is exhausted from the indoor to the outdoor and the refrigerant concentration near the refrigerant detection sensor 14 is reduced to a concentration sufficiently lower than the ignition concentration. Therefore, the operation of the exhaust device 12 may be stopped when the detection voltage of the refrigerant detection sensor 14 is lower than a preset threshold voltage for determining the end of exhaust. Further, the operation of the exhaust device 12 may be stopped by a lapse of a predetermined time from the start of driving of the exhaust device 12.
The control device 20 continues to notify the occurrence of the refrigerant leakage by the notification device 15 even during and after the operation of the exhaust device 12 is stopped. When a notification stop operation or the like is performed by the user, the notification is stopped.
As described above, according to embodiment 1, the following effects can be obtained by providing the refrigerant detection sensor 14 in the pipe portion extending from the indoor side end 5a of the heat insulator 5 in the connection pipe 2 or in the structure around the pipe portion. Namely: both of the refrigerant leakage from the joint portion of the connecting pipe 2 and the extension pipe 3 and the refrigerant leakage from the brazing position of the heat transfer pipe 1aa and the connecting pipe 2 can be detected quickly.
Further, since the control device 20 stops the operation of the air conditioner when the refrigerant leakage is detected, the refrigerant leakage can be prevented from continuing to occur.
Further, when the control device 20 detects the refrigerant leakage, the exhaust device 12 is driven to discharge the refrigerant from the indoor space to the outdoor space, and therefore the leaked refrigerant does not remain in the indoor space. Therefore, the possibility that the refrigerant concentration in the room reaches the ignition concentration can be eliminated.
Further, the exhaust device 12 is a fan attached to the outdoor side outlet 11a of the insertion pipe 11 provided penetrating the wall W, and it is not necessary to secure an installation space in the room when installing the exhaust device 12, and it is easy to attach the exhaust device to a conventional air conditioner.
Further, by providing the refrigerant detection sensor 14, its signal processing circuit, the exhaust device 12, and the notification device 15 as a kit to the air conditioner, the refrigerant leakage detection function can be added to the air conditioner at a relatively low cost without greatly changing the specification of the air conditioner.
Description of reference numerals: 1 … indoor unit; 1a … indoor heat exchanger; 1aa … heat transfer tubes; 2 … connecting pipe; 3 … extension pipe; 4 … tab portions; 5 … heat shield; 5a … indoor side end; 10 … outdoor unit; 11 … inserting a tube; 11a … outdoor side outlet; 12 … exhaust; 12a … motor; 12b … leaf; 13 … housing case; 14 … refrigerant detection sensor; 15 … notification means; 20 … control device; w … wall.
Claims (4)
1. An air conditioner in which a connection pipe connected to an indoor unit and an extension pipe connected to an outdoor unit are connected via a joint member, the air conditioner comprising:
a heat insulator that covers the connection pipe to insulate heat, one end of the heat insulator being positioned in the room, and the other end of the heat insulator extending to a position covering the joint member,
a refrigerant detection sensor that detects a refrigerant; and
a control device that detects the presence or absence of refrigerant leakage based on a detection result of the refrigerant detection sensor,
the connection pipe is connected to a heat transfer pipe of an indoor heat exchanger disposed in the indoor unit, and the refrigerant detection sensor is attached to a pipe portion extending from the heat insulator or a structure around the pipe portion on the side of the indoor heat exchanger.
2. The air conditioner according to claim 1,
the control device stops the operation of the air conditioner when detecting the leakage of the refrigerant.
3. An air conditioner according to claim 1 or 2,
comprises an exhaust device for exhausting indoor air to the outside,
the control device drives the exhaust device when detecting the refrigerant leakage.
4. An air conditioner according to claim 3,
an insertion pipe through which the connection pipe or the extension pipe passes is provided so as to penetrate a wall,
the exhaust device is a fan and is attached to an outdoor side outlet of the insertion pipe.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/000576 WO2019138529A1 (en) | 2018-01-12 | 2018-01-12 | Air conditioning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210463267U true CN210463267U (en) | 2020-05-05 |
Family
ID=67218528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201890000177.3U Active CN210463267U (en) | 2018-01-12 | 2018-01-12 | Air conditioner |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2019138529A1 (en) |
| CN (1) | CN210463267U (en) |
| WO (1) | WO2019138529A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7385143B2 (en) * | 2019-03-05 | 2023-11-22 | ダイキン工業株式会社 | air conditioner |
| EP3974735A1 (en) | 2020-09-25 | 2022-03-30 | Daikin Industries, Ltd. | Indoor unit of a heat pump |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3414464B2 (en) * | 1993-12-09 | 2003-06-09 | 松下電器産業株式会社 | Air conditioner |
| JPH09324928A (en) * | 1996-06-05 | 1997-12-16 | Daikin Ind Ltd | Air conditioner using combustible refrigerant |
| JP4639451B2 (en) * | 2000-09-26 | 2011-02-23 | ダイキン工業株式会社 | Air conditioner |
| JP2005048965A (en) * | 2003-07-29 | 2005-02-24 | Hitachi Home & Life Solutions Inc | Separation type air conditioner |
| JP2008292066A (en) * | 2007-05-25 | 2008-12-04 | Hitachi Appliances Inc | Air conditioner |
| JP5382092B2 (en) * | 2011-11-17 | 2014-01-08 | 三菱電機株式会社 | Air conditioner piping cover device |
| JP2015175531A (en) * | 2014-03-13 | 2015-10-05 | ダイキン工業株式会社 | Refrigeration device unit |
| JP6452961B2 (en) * | 2014-06-05 | 2019-01-16 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN207570109U (en) * | 2016-05-12 | 2018-07-03 | 三菱电机株式会社 | Refrigerant leak detection mechanism |
-
2018
- 2018-01-12 JP JP2019564233A patent/JPWO2019138529A1/en active Pending
- 2018-01-12 CN CN201890000177.3U patent/CN210463267U/en active Active
- 2018-01-12 WO PCT/JP2018/000576 patent/WO2019138529A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2019138529A1 (en) | 2020-07-16 |
| WO2019138529A1 (en) | 2019-07-18 |
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