CN113007863A - Refrigerant leakage alarm sensor assembly, refrigeration equipment and alarm method - Google Patents
Refrigerant leakage alarm sensor assembly, refrigeration equipment and alarm method Download PDFInfo
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- CN113007863A CN113007863A CN202110191340.7A CN202110191340A CN113007863A CN 113007863 A CN113007863 A CN 113007863A CN 202110191340 A CN202110191340 A CN 202110191340A CN 113007863 A CN113007863 A CN 113007863A
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- sensor
- alarm
- sensor assembly
- refrigerant leakage
- controller
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 55
- 238000005057 refrigeration Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000012423 maintenance Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application provides a refrigerant leakage alarm sensor assembly, refrigeration equipment and an alarm method, wherein the sensor assembly comprises a sensor carrier, a sensor upper cover, a sensor body and an alarm, wherein the sensor body is fixedly arranged in a cavity formed by the sensor carrier and the sensor upper cover, and the sensor body and the alarm are respectively in communication connection with an external controller mainboard; the sensor body can detect refrigerant leakage and send a signal to the controller mainboard, and the controller mainboard controls the alarm to give an alarm. Utilize this sensor subassembly, can make the user know the refrigerant leakage at the very first time, guaranteed user's safety in utilization, and its simple structure, simple to operate.
Description
Technical Field
The invention relates to the field of refrigeration equipment parts, in particular to a refrigerant leakage alarm sensor assembly, refrigeration equipment and an alarm method.
Background
For household air conditioners, Freon refrigerants are mainly used in models of R32, R410A, R22 and the like, and mute air conditioners are generally built in the existing air conditioners, when refrigerant leakage occurs in air conditioner pipelines, users cannot know the refrigerant leakage at the first time, and the refrigerant diffusion in a sealed environment has certain harm to human bodies; when the whole air conditioner runs, if the refrigerant leaks at the same time, a client cannot know that the air conditioner is still started to run all the time, and serious potential safety hazards exist.
Therefore, there is a need for an apparatus and method for sensing refrigerant leakage of a refrigeration device at a first time, so as to improve the reliability of the refrigeration device and ensure the safety of users.
Disclosure of Invention
In order to solve the problems in the prior art, the application provides a refrigerant leakage alarm sensor assembly, refrigeration equipment and an alarm method.
In a first aspect, the application provides a refrigerant leakage alarm sensor assembly, which comprises a sensor carrier, a sensor upper cover, a sensor body and an alarm, wherein the sensor body is fixedly arranged in a cavity formed by the sensor carrier and the sensor upper cover, and the sensor body and the alarm are respectively in communication connection with an external controller mainboard; the sensor body can detect refrigerant leakage and send a signal to the controller mainboard, and the controller mainboard controls the alarm to give an alarm.
In one possible embodiment of the first aspect, the sensor carrier and the sensor cover are engaged by a fastener along a perimeter.
In one possible embodiment of the first aspect, the fastener is a snap connection or a screw connection.
In a possible embodiment of the first aspect, the alarm is integrated into the sensor body or the alarm is arranged in the sensor carrier.
In one possible implementation manner of the first aspect, the controller further includes a connecting line for connecting the sensor body and the controller main board.
In a second aspect, the present application further provides a refrigeration device, which includes a panel body, a controller motherboard, and the sensor assembly as described in any one of the first aspect and its possible embodiments, wherein the sensor assembly is fixedly mounted on the panel body and is in communication connection with the controller motherboard.
In a possible embodiment of the second aspect, the panel body is provided with a wiring slot to accommodate a connecting wire.
In one possible embodiment of the second aspect, the refrigeration appliance is an air conditioner or a refrigerator.
In a third aspect, the present application further provides a method of alarming a refrigerant leakage in a refrigeration apparatus according to any one of the second aspect and possible embodiments thereof, the method including: the sensor body detects the current concentration value of the refrigerant around the refrigeration equipment; if the current concentration value is determined to be larger than a preset concentration threshold value, the sensor body sends a signal indicating refrigerant leakage to the controller mainboard; and the controller mainboard controls the alarm to give an alarm and stops operating the refrigeration equipment.
In a possible implementation manner of the third aspect, after the controller main board controls the alarm to alarm, the method further includes: the controller mainboard controls the complete machine of the refrigeration equipment to be powered off, informs maintenance personnel and informs the maintenance personnel of the power failure.
Compared with the prior art, when the refrigerant leaks, the sensor senses the refrigerant leakage and transmits the information to the controller mainboard, and after the mainboard program receives a refrigerant leakage instruction, the alarm is turned on at the first time, the refrigeration equipment is forcibly turned off to operate, and a user can know the problem at the first time; the structure is simple, the use is convenient, the production cost is low, the processing flow is simple, the production assembly efficiency is high, the production and manufacturing cost is low, and the research and development and production cost is greatly reduced.
The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings, in which:
FIG. 1 shows a schematic structural diagram of a sensor assembly according to an embodiment of the invention;
FIG. 2 illustrates a top view of a sensor assembly with a sensor cover removed in accordance with an embodiment of the present invention;
FIG. 3 shows a schematic structural diagram of a refrigeration appliance having a sensor assembly installed therein according to an embodiment of the present invention;
fig. 4 shows a schematic flow chart of a method for alarming a refrigerant leakage of a refrigeration apparatus according to an embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
List of reference numerals:
100-a sensor assembly; 110 a sensor carrier; 111-a fastener; 120-sensor upper cover; 130-a sensor body; 140-connecting lines; 200-air conditioner indoor unit; 210-panel body; 220-appliance box component; 230-evaporator element.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 and 2 are schematic structural views of a sensor assembly 100 provided herein. As shown in fig. 1, the sensor assembly 100 includes a sensor carrier 110 and a sensor upper cover 120, which are closely engaged to form a cavity inside, as viewed from the outside. As shown in fig. 2, inside the cavity is also fixedly mounted a sensor body 130, which is communicatively connected to an external controller main board (shown in fig. 3). The sensor body 130 is a core component of the sensor assembly 110, and can sense a surrounding refrigerant concentration value and send a signal that the refrigerant has leaked to an external controller motherboard.
In one embodiment, as shown in fig. 1 and fig. 2, a fastening member 111 is provided on a side wall of the sensor carrier 110, and correspondingly, a mating fastening member is also provided on a corresponding position of a side wall of the sensor cover 120, and when the two are joined together, the fastening and buckling of the two are realized by the fastening member 111; optionally, the fastener 111 and mating fastener are a snap connection or a screw connection.
In further embodiments, the sensor body 130 is fixedly mounted in the cavity by additional fasteners. Alternatively, as shown in fig. 2, the sensor body 130 is fixedly mounted in the sensor carrier 110 by screws and/or fasteners, and the sensor cover 120 is tightly engaged over the sensor carrier 110 in the manner described in the above embodiments, so as to form the sensor assembly 100 of the present application.
It should be understood that in order to realize the signal transmission, the sensor body 130 should be communicatively connected to a controller main board inside the refrigeration equipment, and the sensor body 130 may send an alarm signal to the controller main board when sensing the refrigerant leakage. Alternatively, the sensor body 130 may be wirelessly connected to a controller motherboard, or may be connected to the controller motherboard via a connection wire 140 (as shown in fig. 2), and the connection wire 140 extends from the inside of the cavity of the sensor assembly 100 to connect to an external controller motherboard.
To achieve the alarm effect, the sensor assembly 100 provided by the present application may further include an alarm (not shown in the drawings), wherein the controller board sends an alarm signal to the alarm based on the received refrigerant leakage signal, and the alarm of the present application can receive and send an alarm sound (e.g., a buzzer sound).
In alternative embodiments, the alarm may be disposed anywhere on the refrigeration device, such as integrated within the sensor body 130 (i.e., the alarm is part of the sensor body 130), disposed in the cavity separately from the sensor body 130, attached to an exterior wall of the sensor assembly 100, disposed within the refrigeration device separately from the sensor assembly 100, or disposed outside the refrigeration device, although the invention is not limited thereto.
In addition, the alarm can be of a type which can beep or flash; the former is suitable for the alarm to be arranged at a position which is not visible for a user, while the latter is suitable for the alarm to be arranged at a position which is visible for the naked eye of a user, for example, outside the refrigeration device.
As described above, the sensor assembly 100 according to the present application can sense the leakage of the refrigerant, which can be applied to a refrigeration apparatus using the refrigerant, such as an air conditioner or a refrigerator. For illustrative purposes, the sensor assembly 100 of the present application will be described below as applied to a refrigeration appliance, taking an air conditioner as an example. However, it should be understood that the features or processes described below would be equally applicable in the context of a refrigerator.
Fig. 3 is a schematic structural diagram of an air conditioner indoor unit 200 according to the present application. As shown in fig. 3, the air conditioner indoor unit 200 includes a panel body 210, an appliance box part 220, an evaporator part 230, and the sensor assembly 100 described above. Specifically, the sensor assembly 100 is fixedly mounted on a mount provided on an inner wall of the panel body 210 above the evaporator unit 230, the condenser unit and the piping, and the controller board is provided in the appliance box unit 220 and communicatively connected with the sensor body 130 and the alarm.
Optionally, in an embodiment in which the sensor body 130 and the controller motherboard are connected via the connection line 140, a wiring card slot may be formed in the panel body 210 to accommodate and control the routing of the connection line on the panel body 210, so as to prevent the connection line from interfering with other parts inside the air conditioner internal unit 200.
Fig. 4 shows a schematic flow chart of a method for alarming refrigerant leakage in the air conditioner indoor unit 200 provided with the sensor assembly 100. The air conditioner is powered on and standby after being installed in a user room, the sensor body 130 monitors whether refrigerant leakage occurs in the air conditioner or not in the installation process, if the refrigerant leakage does not occur, the whole air conditioner starts to operate normally, if the refrigerant leakage occurs, a signal that the refrigerant is leaked is sent to the controller main board, the controller main board receives the signal and sends an alarm signal to the alarm, the alarm is indicated to give an alarm and stop operating the air conditioner, and/or the air conditioner is powered off to inform maintenance personnel of maintaining. And after the maintenance is finished, the maintenance personnel electrify the air conditioner again.
During the operation of the whole air conditioner, the sensor body 130 in the sensor assembly 100 continuously monitors the concentration value of the refrigerant in the environment of the whole air conditioner, and if the leakage is judged to be generated, the alarm alarms and stops operating the whole air conditioner, and/or the air conditioner is powered off to inform maintenance personnel of maintenance. Therefore, the user can know that the refrigerant leaks at the first time, and the safety of the user is ensured.
In the above embodiments, the monitoring of the refrigerant concentration value of the environment inside the machine by the sensor body 130 may be performed in various ways. For example, the sensor body 130 monitors the refrigerant concentration value in real time, so that the leakage can be monitored at the beginning of the refrigerant leakage, and the safety of the user is ensured to the greatest extent. For another example, the sensor body 130 may periodically monitor the refrigerant concentration value, such as every 5 minutes, 10 minutes, or 15 minutes, so as to save power while ensuring timely monitoring of the refrigerant concentration value.
In addition, when the sensor body 130 determines that the refrigerant leaks, the currently monitored concentration value of the refrigerant may be compared with a preset concentration threshold, and if the currently monitored concentration value of the refrigerant is higher than the preset concentration threshold, it is determined that the refrigerant leaks.
In a preferred embodiment, in the case that it is monitored that the refrigerant has leaked, in order to quickly suppress the leakage of the refrigerant, the controller main board may control the air conditioner overall unit to stop operating the air conditioner overall unit within a preset time period (e.g., 3 seconds).
According to the refrigerant leakage alarm sensor assembly, when refrigerant leakage occurs, the sensor senses the refrigerant leakage and transmits information to the controller mainboard, and after a mainboard program receives a refrigerant leakage instruction, the alarm is turned on at the first time, the refrigeration equipment is turned off forcibly, and a user can know problems at the first time; the sensor assembly is simple in structure, convenient to use, low in production cost, simple in machining process, high in production assembly efficiency and low in production and manufacturing cost, and research and development and production cost are greatly reduced.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. A refrigerant leakage alarm sensor assembly is characterized by comprising a sensor carrier, a sensor upper cover, a sensor body and an alarm, wherein the sensor body is fixedly arranged in a cavity formed by the sensor carrier and the sensor upper cover, and the sensor body and the alarm are respectively in communication connection with an external controller mainboard;
the sensor body can detect refrigerant leakage and send a signal to the controller mainboard, and the controller mainboard controls the alarm to give an alarm.
2. The sensor assembly of claim 1, wherein the sensor carrier and the sensor cover are engaged by fasteners along a perimeter.
3. A sensor assembly according to claim 1 or 2, wherein the fastener is a snap-fit connection or a screw connection.
4. A sensor assembly according to claim 1 or 2, wherein the alarm is integrated within the sensor body or is provided within the sensor carrier.
5. The sensor assembly of claim 1 or 2, further comprising a connecting wire for connecting the sensor body and the controller motherboard.
6. Refrigeration device, comprising a panel body, a controller board and a sensor assembly according to any one of claims 1 to 5, wherein the sensor assembly is fixedly mounted on the panel body and is in communication connection with the controller board.
7. The refrigeration equipment as claimed in claim 6, wherein the panel body is provided with a wiring slot to accommodate a connecting wire.
8. The refrigeration appliance according to claim 6, wherein the refrigeration appliance is an air conditioner or a refrigerator.
9. A method of alarming a refrigerant leakage using the refrigerating apparatus as set forth in any one of claims 6 to 8, comprising:
the sensor body detects the current concentration value of the refrigerant around the refrigeration equipment;
if the current concentration value is determined to be larger than a preset concentration threshold value, the sensor body sends a signal indicating refrigerant leakage to the controller mainboard; and
the controller mainboard controls the alarm to give an alarm and stops operating the refrigeration equipment.
10. The method of claim 9, wherein after the controller motherboard controls the alarm to alarm, the method further comprises:
the controller mainboard controls the complete machine of the refrigeration equipment to be powered off and informs maintenance personnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191340.7A CN113007863A (en) | 2021-02-19 | 2021-02-19 | Refrigerant leakage alarm sensor assembly, refrigeration equipment and alarm method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191340.7A CN113007863A (en) | 2021-02-19 | 2021-02-19 | Refrigerant leakage alarm sensor assembly, refrigeration equipment and alarm method |
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| CN113007863A true CN113007863A (en) | 2021-06-22 |
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| CN202110191340.7A Pending CN113007863A (en) | 2021-02-19 | 2021-02-19 | Refrigerant leakage alarm sensor assembly, refrigeration equipment and alarm method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014126253A (en) * | 2012-12-26 | 2014-07-07 | Noritz Corp | Heat pump device |
| CN206420200U (en) * | 2015-10-22 | 2017-08-18 | 三菱电机株式会社 | Refrigerating circulatory device |
| CN207527735U (en) * | 2017-12-08 | 2018-06-22 | 广东美的制冷设备有限公司 | Window air conditioner |
| CN108369022A (en) * | 2015-12-22 | 2018-08-03 | 三菱电机株式会社 | Air-conditioning device |
| CN110848876A (en) * | 2018-08-21 | 2020-02-28 | 奥克斯空调股份有限公司 | Refrigerant leakage detection method and system and air conditioner |
| CA3055142A1 (en) * | 2018-10-17 | 2020-04-17 | Lennox Industries Inc. | Refrigerant pump down for an hvac system |
| CN112105876A (en) * | 2018-05-10 | 2020-12-18 | 三菱电机株式会社 | Refrigerant leakage determination device, air conditioner, and refrigerant leakage determination method |
| CN112154292A (en) * | 2018-05-21 | 2020-12-29 | 三菱电机株式会社 | Air conditioner and packaging set for air conditioner |
-
2021
- 2021-02-19 CN CN202110191340.7A patent/CN113007863A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014126253A (en) * | 2012-12-26 | 2014-07-07 | Noritz Corp | Heat pump device |
| CN206420200U (en) * | 2015-10-22 | 2017-08-18 | 三菱电机株式会社 | Refrigerating circulatory device |
| CN108369022A (en) * | 2015-12-22 | 2018-08-03 | 三菱电机株式会社 | Air-conditioning device |
| CN207527735U (en) * | 2017-12-08 | 2018-06-22 | 广东美的制冷设备有限公司 | Window air conditioner |
| CN112105876A (en) * | 2018-05-10 | 2020-12-18 | 三菱电机株式会社 | Refrigerant leakage determination device, air conditioner, and refrigerant leakage determination method |
| CN112154292A (en) * | 2018-05-21 | 2020-12-29 | 三菱电机株式会社 | Air conditioner and packaging set for air conditioner |
| CN110848876A (en) * | 2018-08-21 | 2020-02-28 | 奥克斯空调股份有限公司 | Refrigerant leakage detection method and system and air conditioner |
| CA3055142A1 (en) * | 2018-10-17 | 2020-04-17 | Lennox Industries Inc. | Refrigerant pump down for an hvac system |
Non-Patent Citations (1)
| Title |
|---|
| 舒华等: "《汽车电控***结构与维修》", 31 May 2005 * |
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Application publication date: 20210622 |
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