CN204648467U - Use the air-conditioner of combustible refrigerant - Google Patents

Abstract

The utility model provides an air conditioner using a flammable refrigerant, comprising: an indoor unit and an outdoor unit; The concentration of flammable refrigerant leaked into the indoor unit and/or the outdoor unit; the inert gas storage is used to store inert gas; the inert gas injection port is arranged in the indoor unit and/or the outdoor unit , the inert gas injection port is connected to the inert gas storage through a pipeline, and a solenoid valve is arranged on the pipeline; a main control chip is electrically connected to the refrigerant concentration sensor and the solenoid valve. The technical scheme of the utility model can ensure that when the flammable refrigerant in the indoor unit and/or outdoor unit leaks, the probability of fire and explosion can be effectively avoided, and the safety of the air conditioner using the flammable refrigerant can be improved.

Description

Air conditioners using flammable refrigerants

technical field

The utility model relates to the technical field of air conditioners, in particular to an air conditioner using a flammable refrigerant.

Background technique

As HCFCs refrigerants are phased out and global warming leads to the emission control of substances with high greenhouse effect coefficient (GWP, Global Warming Potential, that is, global warming potential), flammable refrigerants will gradually become the trend of room air conditioners in the future. However, after using flammable refrigerant, there will be a safety hazard of leakage into the room.

Therefore, how to improve the safety of air conditioners using flammable refrigerants has become a technical problem to be solved urgently.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art or the related art.

Therefore, an object of the present utility model is to propose an air conditioner using flammable refrigerants, which can effectively avoid the probability of fire and explosion when the flammable refrigerants in the indoor unit and/or outdoor unit leak , Improve the safety of air conditioners using flammable refrigerants.

In order to achieve the above object, according to the embodiment of the first aspect of the utility model, an air conditioner using a flammable refrigerant is proposed, including: an indoor unit and an outdoor unit; a refrigerant concentration sensor, which is arranged on the indoor unit and the outdoor unit /or in the outdoor unit, used to detect the concentration of flammable refrigerant leaked into the indoor unit and/or leaked into the outdoor unit; an inert gas storage, used to store inert gas; an inert gas injection port, Set in the indoor unit and/or the outdoor unit, the inert gas injection port is connected to the inert gas storage through a pipeline, and a solenoid valve is arranged on the pipeline; the main control chip is connected to the refrigerant concentration The sensor is electrically connected with the solenoid valve.

According to the embodiment of the utility model, the air conditioner using flammable refrigerant is divided into indoor unit and outdoor unit. By installing a refrigerant concentration sensor on the indoor unit and/or outdoor unit, it is possible to detect the occurrence of refrigerant in a timely and effective manner. Leakage, and then can control the inert gas storage to inject inert gas through the inert gas injection port in the indoor unit and/or outdoor unit to reduce the concentration of the leaked flammable refrigerant, thereby reducing the probability of fire and explosion, effectively Improves the safety of air conditioners using flammable refrigerants. Wherein the inert gas includes, but is not limited to: inflammable gases such as carbon dioxide and nitrogen.

The air conditioner using flammable refrigerants according to the above-mentioned embodiments of the present utility model may also have the following technical features:

According to an embodiment of the present invention, it also includes: a fire extinguishing device, arranged in the indoor unit and/or the outdoor unit, for generating smoke and/or in the indoor unit and/or the outdoor unit In case of fire, perform fire extinguishing operations. Among them, there are two ways to control the fire extinguishing device. The first way is to trigger the fire extinguishing device to extinguish the fire as the temperature rises when the indoor unit and/or outdoor unit catches fire, such as melting the sieve of a dry powder fire extinguisher and spraying Dry powder fire extinguishing agent; the second method is triggered by electronic control, as follows:

According to an embodiment of the present invention, it further includes: a smoke sensor, arranged in the indoor unit and/or the outdoor unit, for detecting whether smoke is generated in the indoor unit and/or the outdoor unit; and /or a flame sensor, which is arranged in the indoor unit and/or the outdoor unit, and is used to detect whether a flame is generated in the indoor unit and/or the outdoor unit; the fire extinguishing device is connected with a trigger structure, and the The trigger mechanism is used to trigger the fire extinguishing device to perform a fire extinguishing operation, and the main control chip is electrically connected to the smoke sensor and/or the flame sensor, and is connected to the trigger mechanism.

According to an air conditioner using a flammable refrigerant in an embodiment of the present invention, a fire extinguishing device is provided in the indoor unit and/or the outdoor unit, so that smoke is generated in the indoor unit and/or outdoor unit when the smoke sensor detects, or When the flame sensor detects flames in the indoor unit and/or outdoor unit, the main control chip can trigger the fire extinguishing device to extinguish the fire in time through the trigger mechanism, which realizes the prevention of fire, and the electronic control method can be used in the indoor unit and/or outdoor unit. When the air conditioner is just on fire, the fire extinguishing device is triggered to extinguish the fire, which further improves the safety of the air conditioner using flammable refrigerants.

According to an embodiment of the present utility model, the fire extinguishing device includes: a dry powder fire extinguisher. Among them, dry powder fire extinguishers are disposable or refillable.

According to an embodiment of the present invention, the smoke sensor and/or the flame sensor, and the fire extinguishing device are arranged in the electric control box of the indoor unit and/or in the electric control box of the outdoor unit.

According to the air conditioner using flammable refrigerants in the embodiment of the present utility model, by installing smoke sensors and/or flame sensors and fire extinguishing devices in the electric control box of the indoor unit and/or in the electric control box of the outdoor unit, it is possible to When a fire occurs in the electric control box of the indoor machine and/or the electric control box of the outdoor machine due to leakage of flammable refrigerant or improper use of electricity, the fire extinguishing operation can be carried out in time, effectively avoiding the further expansion and deterioration of the accident.

According to an embodiment of the present utility model, the indoor unit and the outdoor unit are provided with the inert gas injection ports, and the inert gas injection ports provided in the indoor unit and the outdoor unit are connected with the inert gas injection ports. The solenoid valves are provided on the connecting pipelines between the inert gas storages.

According to the air conditioner using flammable refrigerants in the embodiment of the present invention, inert gas injection ports are installed in both the indoor unit and the outdoor unit, so that when the leakage of the flammable refrigerant in the indoor unit or outdoor unit is detected, , can trigger the solenoid valve to inject inert gas to reduce the concentration of flammable refrigerant in the indoor unit or outdoor unit, thereby reducing the probability of fire and explosion. By arranging electromagnetic valves on the connecting pipes between the inert gas injection ports and the inert gas storage in the indoor unit and the outdoor unit, it is possible to control the injection of inert gas into the indoor unit or the outdoor unit respectively.

According to an embodiment of the present utility model, the inert gas injection port is arranged in the electric control box of the indoor unit and/or outside the electric control box of the indoor unit, and/or is arranged in the electric control box of the outdoor unit. inside the control box and/or outside the electric control box of the outdoor unit.

Preferably, the inert gas injection port is provided inside and outside the electric control box of the indoor unit, and the inert gas injection port is provided in the electric control box of the outdoor unit.

According to the air conditioner using flammable refrigerants according to the embodiment of the present utility model, since the indoor unit is placed indoors, and a fire source is easily generated in the electric control box, in order to avoid leakage of the flammable refrigerant outside the electric control box of the indoor unit, In order to prevent potential safety hazards from spreading indoors, and avoid leakage into the electric control box of the indoor unit to cause explosion, inert gas injection ports can be installed inside the electric control box of the indoor unit and outside the electric control box, and since the outdoor unit is placed outdoors, it can The inert gas injection port is only provided in the electric control box of the outdoor unit; of course, the inert gas injection port can also be provided outside the electric control box of the outdoor unit.

According to an embodiment of the present invention, it further includes: an indoor unit fan and/or an outdoor unit fan, the indoor unit fan is arranged in the indoor unit, the outdoor unit fan is arranged in the outdoor unit, the The main control chip is electrically connected with the indoor unit fan and/or the outdoor unit fan.

According to the air conditioner using flammable refrigerants according to the embodiment of the present utility model, by setting the indoor unit fan and/or the outdoor unit fan, when the flammable refrigerant leaks, the main control chip can start the indoor unit fan and/or The fan of the outdoor unit is used for ventilation, which effectively avoids safety accidents such as fire and explosion caused by excessive concentration of flammable refrigerants.

According to an embodiment of the present invention, it also includes: an inert gas storage sensor, arranged on the inert gas storage, for detecting the amount of inert gas in the inert gas storage, and the inert gas storage sensor is also connected to to the main control chip.

According to the air conditioner using flammable refrigerants in the embodiment of the present invention, by installing an inert gas storage sensor on the inert gas storage, it is possible to detect the gas storage in the inert gas storage in real time, so as to store the gas in the inert gas storage. When the stock is insufficient, remind the user to replace it in time. Among them, the inert gas storage is one-time or refillable.

According to an embodiment of the present invention, it further includes: an alarm device electrically connected to the main control chip.

According to the air conditioner using flammable refrigerant according to the embodiment of the present invention, when accidents such as leakage of flammable refrigerant or fire occur, the main control chip can control the alarm device to give an alarm; When the quantity sensor detects that the inert gas stock is insufficient, the main control chip controls the alarm device to give an alarm.

Preferably, the inert gas storage is arranged in the outdoor unit.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Figure 1 shows a schematic structural view of an air conditioner using a flammable refrigerant according to an embodiment of the present invention;

Fig. 2 shows a schematic diagram of the workflow of detecting and suppressing the leakage of flammable refrigerant by an air conditioner using flammable refrigerant according to an embodiment of the present invention;

Fig. 3 shows a schematic diagram of the working process of igniting and extinguishing the electric control box by an air conditioner using a flammable refrigerant according to an embodiment of the present invention.

Detailed ways

In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, a lot of specific details have been set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from those described here, therefore, the protection scope of the utility model is not limited by the following limitations of the specific embodiments disclosed.

Fig. 1 shows a schematic structural diagram of an air conditioner using a flammable refrigerant according to an embodiment of the present invention.

As shown in Figure 1, the air conditioner using flammable refrigerant according to the embodiment of the present utility model includes: indoor unit 1; indoor unit refrigerant concentration sensor 2; indoor unit smoke (and/or flame) sensor 3; Electric control box inert gas injection port 4; inert gas transmission pipe 5; indoor unit inert gas stop valve 6; outdoor unit refrigerant concentration sensor 7; outdoor unit smoke (and/or flame) sensor 8; outdoor unit electric control box fire extinguishing agent 9. Outdoor electrical control box inert gas injection port 10; outdoor unit inert gas shut-off valve 11; inert gas main solenoid valve 12; inert gas storage 13; inert gas stock sensor 14; outdoor unit fan 15; outdoor unit 16; indoor, Refrigerant cut-off valve 17 for outdoor unit; gas pipe 18 for connecting indoor and outdoor units; liquid pipe 19 for connecting indoor and outdoor units; fire extinguishing agent 20 for indoor unit electric control box; indoor unit fan 21; indoor unit inert gas injection port 22.

Wherein, the fire extinguishing agent 9 of the electric control box of the outdoor machine and the fire extinguishing agent 20 of the electric control box of the indoor machine can be dry powder fire extinguishing agents.

The following describes how to ensure the safe use of the flammable refrigerant air conditioner on the basis of the hardware structure of the present invention in detail with reference to FIG. 2 and FIG. 3 .

Fig. 2 shows a schematic diagram of the workflow of detecting and suppressing the leakage of flammable refrigerant by an air conditioner using flammable refrigerant according to an embodiment of the present invention.

As shown in FIG. 2 , the workflow for detecting and suppressing the leakage of flammable refrigerant by an air conditioner using flammable refrigerant according to an embodiment of the present invention includes:

Step 202, judge whether the inert gas inventory is sufficient, if so, execute step 204 and step 224; otherwise, execute step 222.

In step 204, the refrigerant concentration in the outdoor unit is detected by the refrigerant concentration detection sensor, and step 206 is executed.

Step 206, judge whether there is leakage, if so, execute step 208, otherwise, return to execute step 204.

Step 208 , judging whether the detected refrigerant concentration leaked from the indoor unit is less than 5% LFL (lower ignition limit concentration), if yes, return to step 204 ; otherwise, execute step 210 .

Step 210, release the inert gas to the indoor unit.

Step 212, close the stop valve of the connecting pipe.

Step 214, stop the compressor.

Step 216 , judging whether the detected refrigerant concentration leaked from the indoor unit is less than 30% LFL (lower ignition limit concentration), if yes, execute step 220 ; otherwise, execute step 218 .

Step 218, power off the system.

Step 220, start the fan of the indoor unit to ventilate, and execute step 222.

Step 222, triggering the alarm device to give an alarm.

In step 224, the refrigerant concentration in the outdoor unit is detected by the refrigerant concentration detection sensor, and step 226 is executed.

Step 226, judge whether there is leakage, if yes, execute step 228, otherwise, return to execute step 224.

Step 228 , judging whether the detected refrigerant concentration leaked from the outdoor unit is less than 5% LFL (lower ignition limit concentration), if yes, return to step 224 ; otherwise, execute step 230 .

Step 230, releasing the inert gas to the outdoor unit.

Step 232, close the stop valve of the connecting pipe.

Step 234, stop the compressor.

Step 236 , judging whether the detected refrigerant concentration leaked from the outdoor unit is less than 30% LFL (lower ignition limit concentration), if yes, execute step 240 ; otherwise, execute step 238 .

Step 238, power off the system.

Step 240, start the fan of the outdoor unit to ventilate, and go to step 222.

Through the above steps, the detection of the flammable refrigerant leakage problem in the indoor unit and the outdoor unit is realized, and the probability of fire and explosion is reduced by releasing inert gas.

Fig. 3 shows a schematic diagram of the working process of igniting and extinguishing the electric control box by an air conditioner using a flammable refrigerant according to an embodiment of the present invention.

As shown in Figure 3, according to the embodiment of the utility model, the working process of the air conditioner using flammable refrigerant to fire the electric control box includes:

Outdoor unit part:

Step 302, detect whether there is smoke or flame in the electric control box of the outdoor unit, and execute step 304.

Step 304, judge whether the electric control box of the outdoor unit is on fire, if so, execute step 306; otherwise, return to execute step 302. Wherein, when smoke or flame is detected in the electric control box of the outdoor machine, it is determined that the electric control box of the outdoor machine is on fire.

Step 306, release the fire extinguishing agent of the outdoor electric control box, and execute step 314.

In step 314, the air conditioner is powered off, and step 316 is executed.

Step 316, triggering the alarm device to give an alarm.

Indoor unit part:

Step 308 , detect whether there is smoke or flame in the electric control box of the indoor unit, and execute step 310 .

Step 310, judge whether the electric control box of the indoor unit is on fire, if so, execute step 312; otherwise, return to execute step 308. Wherein, when smoke or flame is detected in the electric control box of the indoor machine, it is determined that the electric control box of the indoor machine is on fire.

Step 312, release the fire extinguishing agent of the indoor electric control box, and execute step 314.

In step 314, the air conditioner is powered off, and step 316 is executed.

Step 316, triggering the alarm device to give an alarm.

Through the above scheme, after the smoke or flame detection sensor in the indoor unit and/or outdoor unit of the air conditioner detects smoke or flame, the fire extinguishing agent placed in the electric control box can be automatically released for fire fighting, thereby avoiding further expansion of the accident and deterioration.

In addition, the fire extinguishing device can also automatically trigger fire extinguishing when the temperature inside the indoor unit and/or outdoor unit rises, such as melting the sieve of the dry powder fire extinguisher and spraying dry powder fire extinguishing agent, so as to avoid internal and/or outdoor unit The problem that the fire extinguishing device cannot be triggered when the fire is on and the power is cut off.

The technical scheme of the utility model has been described in detail above in conjunction with the accompanying drawings. The utility model proposes a new air conditioner using flammable refrigerant, which can ensure that the flammable refrigerant in the indoor unit and/or outdoor unit leaks , effectively avoid the probability of fire and explosion, and improve the safety of air conditioners using flammable refrigerants.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (11)

1. An air conditioner using a flammable refrigerant, characterized in that it comprises: Indoor and outdoor units; A refrigerant concentration sensor, arranged in the indoor unit and/or the outdoor unit, for detecting the concentration of flammable refrigerant leaked into the indoor unit and/or into the outdoor unit; Inert gas storage for storing inert gas; An inert gas injection port is arranged in the indoor unit and/or the outdoor unit, the inert gas injection port is connected to the inert gas storage through a pipeline, and a solenoid valve is arranged on the pipeline; The main control chip is electrically connected with the refrigerant concentration sensor and the solenoid valve. 2. The air conditioner using flammable refrigerant according to claim 1, further comprising: The fire extinguishing device is arranged in the indoor unit and/or the outdoor unit, and is used for performing a fire extinguishing operation when smoke and/or flames are generated in the indoor unit and/or the outdoor unit. 3. The air conditioner using flammable refrigerant according to claim 2, further comprising: a smoke sensor, arranged in the indoor unit and/or the outdoor unit, for detecting whether smoke is generated in the indoor unit and/or the outdoor unit; and/or a flame sensor, arranged in the indoor unit and/or the outdoor unit, for detecting whether a flame is generated in the indoor unit and/or the outdoor unit; The fire extinguishing device is connected to a trigger structure, and the trigger mechanism is used to trigger the fire extinguishing device to perform a fire extinguishing operation. The main control chip is electrically connected to the smoke sensor and/or the flame sensor, and is connected to the trigger mechanism. 4. The air conditioner using flammable refrigerant according to claim 2, wherein the fire extinguishing device comprises: a dry powder fire extinguisher. 5. The air conditioner using flammable refrigerant according to claim 3, wherein the smoke sensor and/or the flame sensor, and the fire extinguishing device are arranged in the electric control box of the indoor unit And/or in the electric control box of the outdoor unit. 6. The air conditioner using flammable refrigerant according to claim 1, characterized in that, the inert gas injection port is arranged in the indoor unit and the outdoor unit, and is arranged in the indoor unit and the outdoor unit. The solenoid valves are provided on the connecting pipes between the inert gas injection port and the inert gas storage in the outdoor unit. 7. The air conditioner using flammable refrigerant according to claim 1, wherein the inert gas injection port is arranged in the electric control box of the indoor unit and/or in the electric control box of the indoor unit outside, and/or arranged inside and/or outside the electric control box of the outdoor unit. 8. The air conditioner using flammable refrigerant according to claim 7, characterized in that the inert gas injection port is provided inside and outside the electric control box of the indoor unit , the electric control box of the outdoor unit is provided with the inert gas injection port. 9. The air conditioner using flammable refrigerant according to claim 1, further comprising: An indoor unit fan and/or an outdoor unit fan, the indoor unit fan is arranged in the indoor unit, the outdoor unit fan is arranged in the outdoor unit, the main control chip and the indoor unit fan and/or The fan of the outdoor unit is electrically connected. 10. The air conditioner using flammable refrigerant according to claim 1, further comprising: The inert gas storage amount sensor is arranged on the inert gas storage, and is used to detect the inert gas amount in the inert gas storage, and the inert gas storage amount sensor is also connected to the main control chip. 11. The air conditioner using a flammable refrigerant according to any one of claims 1 to 10, further comprising: an alarm device electrically connected to the main control chip; The inert gas storage is arranged in the outdoor unit.