CN104101066B - Air conditioner protection system, control method thereof and air conditioner - Google Patents

Abstract

The invention discloses an air conditioner protection system, a control method thereof, and an air conditioner. The air conditioner protection system includes: a detection device (50), arranged on the side where the indoor unit (20) of the air conditioner is located, to detect whether flammable refrigerant leakage occurs on the side where the indoor unit (20) is located; a control device, electrically connected to the detection device (50 ), receive the detection information of the detection device (50), and issue a control command according to the detection information; the spray device, connected to the control device, and set corresponding to the indoor unit (20), when a flammable refrigerant leakage is detected, according to the control device The control instruction executes the spray action. According to the air conditioner protection system of the present invention, the possibility of burning or explosion of the air conditioner can be reduced when the flammable refrigerant leaks, and the safety of the air conditioner in use can be improved.

Description

Air conditioner protection system and its control method, air conditioner

technical field

The invention relates to the field of air conditioners, in particular to an air conditioner protection system, a control method thereof, and an air conditioner.

Background technique

In order to protect the human living environment and reduce the damage to the ozone layer and the greenhouse effect, people began to replace the existing fluorine-containing refrigerants with new refrigerants such as hydrocarbons and HFC refrigerants. However, most of these refrigerants are flammable and combustible. Explosion, if leakage occurs, it may be ignited once it encounters an ignition source such as high ambient temperature or static sparks, and there is a danger of explosion when the concentration reaches a certain range.

Contents of the invention

Embodiments of the present invention provide an air conditioner protection system and its control method, and an air conditioner, which can reduce the possibility of combustion or explosion of the air conditioner when a flammable refrigerant leaks, and improve the safety of the air conditioner during use.

In order to solve the above-mentioned technical problems, an embodiment of the present invention provides an air conditioner protection system, including: a detection device, which is arranged on the side of the air conditioner where the indoor unit is located, to detect whether there is leakage of flammable refrigerant on the side where the indoor unit is located; a control device, electrically connected to The detection device receives the detection information of the detection device and sends out control instructions according to the detection information; the spray device is connected to the control device and is set corresponding to the indoor unit, and executes spraying according to the control instructions of the control device when the leakage of flammable refrigerant is detected action.

Preferably, the air conditioner protection system further includes: a first control valve, arranged at the outlet end of the indoor unit, for controlling the on-off of the pipeline through which the flammable refrigerant flows out of the indoor unit; a second control valve, arranged at the inlet end of the indoor unit, It is used to control the on-off of the pipeline of flammable refrigerant flowing into the indoor unit; the control device is electrically connected and controls the opening and closing of the first control valve and the second control valve.

Preferably, the control device includes a power cut-off module, which is used to issue a control command to control the power cut off of the air conditioner after detecting the leakage of combustible refrigerant.

Preferably, the indoor unit includes an evaporator and an internal fan arranged corresponding to the evaporator.

Preferably, the detection device is arranged above the evaporator of the indoor unit or at the elbow at the outlet end of the evaporator.

Preferably, the spray device has built-in water or flame retardant gas.

Preferably, the air conditioner protection system further includes an alarm device, which is electrically connected to the control device, and sends out an alarm after detecting the leakage of flammable refrigerant.

According to another aspect of the present invention, an air conditioner is provided, including an indoor unit, a throttling device, an outdoor unit, and a compressor connected in sequence, and also includes the above-mentioned air-conditioning protection system, and the indoor unit is the above-mentioned indoor unit.

According to yet another aspect of the present invention, a control method of an air conditioner protection system is provided, including: step S1: detecting whether flammable refrigerant leakage occurs on the side where the indoor unit of the air conditioner is located; step S2: judging whether flammable refrigerant occurs according to the detection information and issue a spray command when it is determined that the flammable refrigerant leaks; Step S3: perform a spray action according to the spray command to reduce the indoor temperature of the indoor unit or eliminate the fire source in the room.

Preferably, after the step of determining the leakage of the flammable refrigerant, the step of issuing the spray instruction further includes recovering the flammable refrigerant.

Preferably, the step of recovering the combustible refrigerant includes: closing the second control valve, opening the first control valve; keeping the compressor running, and running the internal fan for t time; closing the first control valve.

Preferably, after the step of closing the first control valve, before the step of issuing the spraying instruction, the method further includes: issuing a power-off instruction to control the air conditioner to be powered off.

Applying the technical solution of the present invention, the air conditioner protection system includes: a detection device, arranged on the side where the indoor unit of the air conditioner is located, to detect whether flammable refrigerant leakage occurs on the side where the indoor unit is located; a control device, electrically connected to the detection device, receiving the detection device Detect information, and issue control instructions according to the detection information; the spraying device is connected to the control device, and is set corresponding to the indoor unit, and executes the spraying action according to the control command of the control device when the leakage of flammable refrigerant is detected. After applying the air conditioner protection system, once the leakage of flammable refrigerant is detected on the side where the indoor unit is located, the control device can send an instruction to the spray device to control the spray device to perform spraying action to reduce the indoor temperature or eliminate the possible presence of refrigerant in the room. fire source, thereby reducing the possibility of air conditioner burning or explosion caused by fire after leakage of flammable refrigerant, and improving the safety of air conditioner use.

Description of drawings

Fig. 1 is the structural diagram of the air conditioner of the embodiment of the present invention;

Fig. 2 is the working principle diagram of the air conditioning protection system of the embodiment of the present invention;

Fig. 3 is a working flow chart of the air conditioner protection system according to the embodiment of the present invention.

Description of reference signs: 10, outdoor unit; 20, indoor unit; 30, throttling device; 40, compressor; 50, detection device; 60, first control valve; 70, second control valve; 11, condenser; 12. External fan; 21. Evaporator; 22. Internal fan.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

The proposal of this application is to link the air conditioning system with the sprinkler system, and to monitor in real time by installing leak detection sensors inside the indoor unit of the air conditioner or other places in the room. When a leak of flammable refrigerant is detected, the air conditioner will take corresponding protective measures , After that, turn on the sprinkler system to reduce the indoor ambient temperature, and at the same time, eliminate possible fire sources to avoid danger.

As shown in FIGS. 1 to 3 , according to an embodiment of the present invention, the air conditioner protection system includes a detection device 50 , a control device and a spraying device. The detection device 50 is arranged on the side where the indoor unit 20 of the air conditioner is located, and detects in real time whether the flammable refrigerant leakage occurs on the side where the indoor unit 20 is located. It is sufficient to detect the leakage of the flammable refrigerant that occurs on the side where the indoor unit is located, and the detection device is, for example, a leak detection sensor. The control device is electrically connected to the detection device 50, receives detection information from the detection device 50, and issues a control command according to the detection information. The spraying device is connected to the control device and arranged corresponding to the indoor unit 20, and performs a spraying action according to a control command of the control device when leakage of flammable refrigerant is detected. There can be many kinds of control instructions, and the control instructions sent to the spraying device are spraying instructions here. The spray device has built-in water or flame retardant gas, etc.

After the air conditioner protection system is applied, once the detection device 50 detects the leakage of flammable refrigerant on the side where the indoor unit is located, the control device can send an instruction to the spray device to control the spray device to perform a spray action, and the spray device will spray water Or the flame retardant gas can be sprayed out, which can reduce the temperature of the room where the indoor unit 20 is located, and eliminate the fire source in the room where the indoor unit 20 is located, thereby reducing the possibility of burning or explosion of the air conditioner caused by a fire after the leakage of flammable refrigerant and improve the safety of the air conditioner.

Preferably, the air conditioner protection system further includes: a first control valve 60, arranged at the outlet end of the indoor unit 20, for controlling the on-off of the pipeline for the flammable refrigerant to flow out of the indoor unit 20; a second control valve 70, arranged at the outlet end of the indoor unit The inlet end of 20 is used to control the on-off of the pipeline of flammable refrigerant flowing into the indoor unit 20; the control device is electrically connected and controls the opening and closing of the first control valve 60 and the second control valve 70. By controlling the first control valve 60 and the second control valve 70 respectively by the control device, the combustible refrigerant can be recovered in time after the leakage of the combustible refrigerant is detected, and the combustible refrigerant can be recovered to the side where the outdoor unit 10 is located, thereby Prevent flammable refrigerant from continuing to enter the side where the indoor unit is located to increase the content of flammable refrigerant in the indoor unit 20, reducing the possibility of combustion or explosion of the air conditioner.

The control device also includes a power-off module, which is used to send a power-off command to control the power-off of the air conditioner after detecting the leakage of combustible refrigerant.

The indoor unit 20 includes an evaporator 21 and an internal fan 22 corresponding to the evaporator 21 . The internal fan 22 can be turned on when the flammable refrigerant is recovered, so as to speed up the recovery of flammable refrigerant, accelerate the reduction of the flammable refrigerant content on the side where the indoor unit is located, and reduce the possibility of combustion of the indoor unit.

Preferably, the detection device 50 is set above the evaporator 21 of the indoor unit 20 or at the elbow of the outlet end of the evaporator 21, these two places belong to the places where the indoor unit 20 is prone to refrigerant leakage, so the detection device 50 is set at One of these two positions, or both positions, help the detection device 50 to detect the leakage of flammable refrigerant quickly and timely, so that the air conditioner protection system can quickly and timely take measures to protect the air conditioner .

The air conditioner protection system also includes an alarm device, which is electrically connected to the control device and sends out an alarm after detecting the leakage of flammable refrigerant to remind users to pay attention to safety and take more effective measures to prevent the air conditioner from burning and reduce the risk of personal injury. Possibility of security incidents.

Referring to Fig. 1, according to an embodiment of the present invention, the air conditioner includes an indoor unit 20, a throttling device 30, an outdoor unit 10 and a compressor 40 connected in sequence, and also includes the above-mentioned air-conditioning protection system. The indoor unit 20 is the aforementioned indoor unit 20. The outdoor unit 10 includes a condenser 11 and an external fan 12 corresponding to the condenser 11 .

As shown in FIG. 3 , according to an embodiment of the present invention, the control method of the air conditioner protection system includes: step S1: detecting whether flammable refrigerant leakage occurs on the side where the indoor unit 20 of the air conditioner is located; step S2: judging whether leakage occurs according to the detection information The flammable refrigerant leaks, and when it is determined that the flammable refrigerant leaks, a spraying command is issued; Step S3: Perform a spraying action according to the spraying command to reduce the indoor temperature of the indoor unit 20 or eliminate the fire source in the room.

After the step of determining that the leakage of the flammable refrigerant occurs, the step of issuing the spray command further includes recovering the flammable refrigerant. Recovering the flammable refrigerant before spraying can further enhance the effect of the spraying device and reduce the possibility of the air conditioner burning or exploding.

The steps of recovering flammable refrigerant include: closing the second control valve 70, opening the first control valve 60; keeping the compressor 40 running, and running the internal fan 22 for t time; closing the first control valve 60. Through these steps, the refrigerant can be quickly and effectively recovered into the outdoor unit 10 , preventing the refrigerant from remaining in the indoor unit 20 and participating in possible combustion accidents.

After the step of closing the first control valve 60, before the step of issuing the spraying instruction, the method further includes: issuing a power-off instruction to control the air conditioner to be powered off. Since the spraying device sprays the entire room, if the spray is conductive liquid and the air conditioner is still powered on, then the air conditioner will burn or explode due to electric sparks generated during the operation of the air conditioner. At this time, if the air conditioner is completely powered off, the possibility of burning the air conditioner due to electric sparks can be eliminated, the possible fire source can be effectively eliminated, and the safety and safety of the spraying device can be guaranteed more effectively. reliability.

Integral air conditioners such as window machines are also applicable to the above method.

The control method of the air conditioning protection system according to the embodiment of the present invention will be described below with reference to FIG. 3 .

After the air conditioner is normally turned on and running, a leak detection sensor is installed inside the indoor unit 20 of the air conditioner. Usually, the leak detection sensor is installed above the evaporator 21 where the air conditioner is prone to leakage or at the elbow at the outlet end of the evaporator 21, or Anywhere else in the room. When the leak detection sensor does not detect any leakage of flammable refrigerant, it still returns to the step of detection, and performs cyclic detection on the side where the indoor unit 20 is located. When the leak detection sensor detects the leakage of flammable refrigerant, the whole machine enters the protection mode, so that the air conditioner does not accept the instructions from the remote control, so as to prevent the user from misoperation and causing greater harm to the air conditioner. At this time, the alarm device needs to be activated simultaneously to give an alarm, so as to remind the user that there is a possibility that the air conditioner may burn or explode, and to remind the user to take timely measures to improve safety.

Then close the second control valve 70, keep the first control valve 60 open, and keep the compressor 40 running continuously, so as to recycle the flammable refrigerant in the indoor unit 20 to the compressor 40 on the outdoor side. In operation, exhaust air for t time, such as 10S, so that the combustible refrigerant can basically flow into the compressor 40 outside the outdoor. After completing the recovery of the refrigerant, close the first control valve 60, and then control the power outage of the whole machine. According to the use of other electrical appliances in the room, consider whether it is necessary to cut off the indoor power supply. When the power is off, the indoor spraying device can be activated to Lower the temperature in the room or eliminate possible sources of ignition in the room.

Of course, the above are preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the basic principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims (12)

1. an air-conditioning protection system, it is characterised in that including:

Detection device (50), is arranged on indoor set (20) side, place of air-conditioner, and detection is described Whether indoor set (20) side, place occurs combustible refrigerant to leak；

Control device, be electrically connected to described detection device (50), receive described detection device (50) Detection information, and according to detection delivering control instruction；

Spray equipment, is connected to described control device, and corresponding described indoor set (20) is arranged, Spray is performed according to the control instruction of described control device when described combustible refrigerant leaks detecting Pouring action.

Air-conditioning the most according to claim 1 protection system, it is characterised in that described air-conditioning is protected Protecting system also includes:

First control valve (60), is arranged on the port of export of described indoor set (20), is used for controlling Described combustible refrigerant flows out the pipeline break-make of described indoor set (20)；

Second control valve (70), is arranged on the entrance point of described indoor set (20), is used for controlling Described combustible refrigerant flows into the pipeline break-make of described indoor set (20)；

Described control device is electrically connected and controls described first control valve (60) and described second The opening and closing of control valve (70).

Air-conditioning the most according to claim 1 protection system, it is characterised in that described control fills Put and include power-off modular, for sending control instruction after the leakage of described combustible refrigerant being detected Control described air-conditioner complete machine power-off.

Air-conditioning the most according to claim 1 protection system, it is characterised in that described indoor set (20) inner blower (22) that vaporizer (21) and the described vaporizer of correspondence (21) are arranged is included.

Air-conditioning the most according to claim 1 protection system, it is characterised in that described detection fills Put (50) and be arranged on vaporizer (21) top of described indoor set (20) or described evaporation The port of export elbow of device (21).

Air-conditioning the most according to claim 1 protection system, it is characterised in that described spray fills Put built-in water or fire-retardant gas.

Air-conditioning the most according to any one of claim 1 to 6 protection system, it is characterised in that Described air-conditioning protection system also includes alarm device, is electrically connected to described control device, and Alarm is sent after the leakage of described combustible refrigerant being detected.

8. an air-conditioner, it is characterised in that include indoor set (20), the throttling being sequentially connected with Device (30), off-premises station (10) and compressor (40), also include in claim 1 to 7 Air-conditioning protection system described in any one, described indoor set (20) is described in claim 1 Indoor set (20).

9. the control method of an air-conditioning protection system, it is characterised in that including:

Step S1: whether indoor set (20) side, place of detection air-conditioner occurs combustible refrigerant Leakage；

Step S2: judge whether combustible refrigerant leakage according to detection information, and determining There is to send during combustible refrigerant leakage spray instruction；

Step S3: perform spray action, to reduce described indoor set (20) according to spray instruction The indoor temperature at place or eliminate the burning things which may cause a fire disaster of described indoor.

Control method the most according to claim 9, it is characterised in that described determine generation After the step of combustible refrigerant leakage, before sending the step of spray instruction, also include that recovery can Combustion cold-producing medium.

11. control methods according to claim 10, it is characterised in that described recovery can The step of combustion cold-producing medium includes:

Close the second control valve (70), open the first control valve (60)；

Keeping compressor (40) to run, operating inner blower (22) also continues the t time；

Close the first control valve (60).

12. control methods according to claim 11, it is characterised in that described closedown first After the step of control valve (60), also include before sending the step of spray instruction: send disconnected Electricity instruction, controls described air-conditioner complete machine power-off.