JP2013064524A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner using a flammable refrigerant, which can prevent fire from being caused by a discharge part of an added function device even when leakage of the refrigerant occurs, and secures high safety.SOLUTION: In the air conditioner using the refrigerant with flammability, an indoor unit 100 disposed on an indoor side includes: a refrigeration-cycle structure comprising an indoor heat exchanger 102, refrigerant piping and the like inside which the flammable refrigerant is contained; and an electric dust collection device 116 for addtion of a function that can not be obtained by the operation of the refrigerant. The electric dust collection device 116 is disposed so as to discharge into air above the refrigeration-cycle structure, and accordingly, if leakage of the flammable refrigerant that is heavier than air occurs, the leaked refrigerant falls downward, thereby preventing the leaked refrigerant from reaching the discharge part (not shown) of the electric dust collection device 116, resulting in the air conditioner with high safety that can be provided.

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner equipped with a discharge means and using a combustible refrigerant.

  In recent years, global warming has become a major problem, and the movement to use refrigerants with low global warming potential has become prominent. As alternative refrigerants for conventional hydrofluorocarbons (HFCs), natural refrigerants and refrigerants such as hydrofluoroolefins having a double bond between carbon have attracted attention.

  Hydrofluoroolefin has attracted particular attention as an alternative refrigerant for HFC-134a, and its practical application to an air conditioner for automobiles is being promoted. The warming potential (100 years) is extremely small compared to 4 in the case of HFO-1234yf, 1 and 430 of HFC-134a, and 2090 of HFC-410A used in air conditioners and the like. This characteristic that the warming coefficient is small is attributed to the fact that there is a double bond between carbon and it is easy to decompose.

  Moreover, as HFC which can be used as a refrigerant with a relatively low global warming potential, it accounts for 50% of HFC-410A and has slightly flammable HFC-32 (GWP675), weakly flammable HFC-152a (GWP124), etc. Strongly flammable hydrocarbons also have excellent characteristics as refrigerants.

  However, all of these gases are flammable, and sufficient care must be taken when handling them.

  On the other hand, in an air conditioner, particularly an air conditioner having a high added function, an air conditioner that promotes dust collection, sterilization, deodorization, and skin beautifying effects using a discharge phenomenon is on the market.

  As a prior art using such a discharge phenomenon, for example, there is an air conditioner described in Patent Document 1.

  The air conditioner described in Patent Document 1 is equipped with an electrostatic precipitator that collects dust by utilizing a discharge phenomenon, and the electrostatic precipitator includes a charging unit composed of an ionization line and a counter electrode plate, and a dust collector. It has a dust collection part consisting of a side electrode and a non-dust collection side electrode opposite to this, and the charging part charges the dust by corona discharge, and the dust collection part uses the Coulomb force to It is something to collect.

  Moreover, there exists an air conditioner as described in patent document 2 as another prior art using a discharge phenomenon. The conventional air conditioner described in Patent Document 2 is equipped with an electrostatic atomizer that charges a fine water droplet using a discharge phenomenon to create an electrostatic mist. By spraying the electrostatic mist into the room, it is possible to remove odor components contained in the room air and odor components adhering to walls, floors, curtains and the like.

JP 2008-183543 A Japanese Patent No. 4096905

  However, in the configuration of the conventional air conditioner as described in Patent Documents 1 and 2, there is a risk that the combustible refrigerant leaks inside the indoor unit and ignites by the discharge energy when passing through the discharge unit. There is sex.

  The present invention solves the above-mentioned conventional problems. In an air conditioner using a flammable refrigerant, even if refrigerant leakage occurs, it prevents ignition in the discharge part of the additional function device and ensures high safety. It aims at providing the air conditioner which can be performed.

  In order to solve the above-described conventional problems, an air conditioner of the present invention is an air conditioner that uses a flammable refrigerant, and the flammable refrigerant is contained in the indoor unit disposed on the indoor side. Refrigeration cycle constituents such as heat exchange means and refrigerant pipes included in the above, and discharge means for adding functions that cannot be obtained by the action of the refrigerant, the discharge means being located above the refrigeration cycle constituents When the flammable refrigerant heavier than air leaks, the leaked refrigerant falls downward, so that it can be prevented from reaching the discharge part of the discharge means. . Therefore, a highly safe air conditioner can be provided.

  The air conditioner of the present invention is an air conditioner that uses a flammable refrigerant, and the heat exchanger and the refrigerant include the flammable refrigerant in the indoor unit disposed on the indoor side. Refrigeration cycle components such as piping, discharge means for adding a function that cannot be obtained by the action of the refrigerant, and heat exchanger end portions where refrigerant pipes at the ends of the discharge means and the heat exchange means are exposed The refrigerant piping means includes a refrigerant shielding means, and when the refrigerant leaks in the refrigerant piping section, the leakage refrigerant is shielded from directly reaching the discharge means. Directly reaching the discharge means can be prevented. Therefore, a highly safe air conditioner can be provided.

  The air conditioner of the present invention is an air conditioner that uses a flammable refrigerant, and the heat exchanger and the refrigerant include the flammable refrigerant in the indoor unit disposed on the indoor side. Refrigeration cycle components such as piping, discharge means for adding a function that cannot be obtained by the action of the refrigerant, air suction means for the discharge means to acquire air to be discharged, and air suction means Refrigerant shielding means for separating an air intake port and a refrigerant pipe part including a heat exchange end part where a refrigerant pipe at an end part of the heat exchange means is exposed. The refrigerant leaks in the refrigerant pipe part. In this case, the leakage refrigerant can be blocked from reaching the air intake port of the air suction means directly. Therefore, a highly safe air conditioner can be provided.

  The air conditioner of the present invention can prevent the leaked refrigerant from reaching the discharge means directly, and thus can achieve high safety without affecting the additional function.

The block diagram of the air conditioner in Embodiment 1 of this invention The block diagram of the air conditioner in Embodiment 2 of this invention A view of arrow A in FIG. The block diagram of the air conditioner in Embodiment 3 of this invention The block diagram of the air conditioner in Embodiment 4 of this invention B arrow view of FIG.

  A first aspect of the present invention is an air conditioner that uses a flammable refrigerant, and the indoor unit disposed on the indoor side includes a heat exchange means that includes the flammable refrigerant therein and a refrigeration such as a refrigerant pipe. A cycle structure and discharge means for adding a function that cannot be obtained by the action of the refrigerant, and the discharge means is disposed so as to discharge to air above the refrigeration cycle structure. When the heavier combustible refrigerant leaks, the leaked refrigerant falls downward, so that it can be prevented from reaching the discharge part of the discharge means. Therefore, a highly safe air conditioner can be provided.

  In the second invention, in particular, the discharge means of the first invention is arranged above the refrigeration cycle component, and the leakage refrigerant can be prevented from reaching the discharge means directly with a simple configuration. it can. Therefore, a highly safe air conditioner can be provided at low cost.

  According to a third aspect of the invention, in particular, the discharge means of the first aspect of the invention has an air suction means for acquiring air to be discharged from above the refrigeration cycle constituting body, and is related to the arrangement of the discharge means main body. Instead, it can be discharged to the air above the refrigeration cycle component. Accordingly, the degree of freedom in design is increased, and a device that is rich in change can be provided.

  A fourth invention is an air conditioner that uses a flammable refrigerant, and the indoor unit disposed on the indoor side includes a heat exchange means that includes the flammable refrigerant therein and a refrigeration such as a refrigerant pipe. A refrigerant pipe including a cycle structure, a discharge means for adding a function that cannot be obtained by the action of the refrigerant, and a heat exchange end portion where a refrigerant pipe at an end portion of the discharge means and the heat exchange means is exposed. And a refrigerant shielding means for separating the refrigerant from the refrigerant pipe. When the refrigerant leaks in the refrigerant pipe section, the refrigerant is blocked so that the leaked refrigerant does not reach the discharge means directly. Can be prevented from reaching. Therefore, a highly safe air conditioner can be provided.

  A fifth aspect of the present invention is an air conditioner that uses a flammable refrigerant, and the indoor unit disposed on the indoor side includes a heat exchange means that includes the flammable refrigerant therein and a refrigeration such as a refrigerant pipe. A cycle structure, discharge means for adding a function that cannot be obtained by the action of the refrigerant, air suction means for the discharge means to acquire air to be discharged, and an air intake port of the air suction means; A refrigerant shielding means for separating a refrigerant pipe portion including a heat exchange end portion where a refrigerant pipe at an end portion of the heat exchanging means is exposed. When the refrigerant leaks in the refrigerant pipe portion, leakage occurs. The refrigerant can be blocked from directly reaching the air intake port of the air suction means. Therefore, a highly safe air conditioner can be provided.

  In particular, the sixth aspect of the invention comprises a blower means for sending out the air heat-exchanged by the heat exchange means of any one of the first to fifth inventions, and the discharge means operates only when the blower means is operating. Since the leaked refrigerant is sucked into the heat exchange means and blown into the room, the indoor unit is filled with the flammable refrigerant, and the discharge means is filled with the flammable refrigerant. Can be avoided. Therefore, the risk of ignition when using the discharge means can be reduced.

  In the seventh aspect of the invention, in particular, in the indoor unit of any one of the first to sixth aspects, the refrigerant detection means for detecting the leaked refrigerant is arranged below the intake means for taking in the discharge means or the air to be discharged. However, the discharge means is driven only when there is no refrigerant leakage, and when there is leakage of the refrigerant, discharge can be avoided. Therefore, the risk of ignition when using the discharge means can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a configuration diagram of an air conditioner according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the indoor unit 100 of the air conditioner according to the present embodiment occupies most of the refrigeration cycle structural body and has a fin tube type indoor heat exchanger 102 as heat exchange means, and indoor heat. An indoor blower 101 serving as a blowing means for sending out indoor air heat-exchanged by the exchanger 102 is disposed and is not shown in FIG. 1, but a compressor, an outdoor heat exchanger, and the like are provided by a gas side pipe and a liquid side pipe. Connected to an outdoor unit equipped with a refrigeration cycle.

  In addition, the elements constituting the indoor unit 100 include a base frame 106 that is a basis for installing the indoor unit 100 on a wall, a main body grill 105, and a movable panel 104 that moves during operation to open the indoor air intake port 110. Similarly, there are the upper and lower blades 103 that control the vertical direction of the wind that moves during operation and the air filter 107 that removes large dust contained in the intake air.

  An electric dust collector 116 is disposed between the air filter 107 and the indoor heat exchanger 102 as a discharging means for adding a function that cannot be obtained by the action of the refrigerant. A gas sensor 108 is disposed as a refrigerant detecting means for detecting the leaked refrigerant.

  As the refrigerant, HFO-1234yf, which has a small global warming potential and is attracting attention as the next generation refrigerant of R134a and R410A, is used. Since the HFO-1234yf has slight flammability, and there is a possibility of burning if there is an ignition source when the refrigerant leaks, the gas sensor 108 monitors the refrigerant leak.

  Although not shown in particular, the electrostatic precipitator 116 includes a charging part composed of an ionization line and a counter electrode plate, and a dust collecting part composed of a dust collecting side electrode and a non-dust collecting side electrode facing the dust collecting side electrode. In the charging unit, dust is charged by corona discharge, and collected in the dust collecting side electrode by using the Coulomb force in the dust collecting unit.

  The air passing through the electric dust collector 116 is a part of the air sucked by the indoor blower 101, and after the large dust is removed by passing through the main body grill 105 and the air filter 107, the electric dust collector 116 Fine dust is also removed and sucked into the indoor heat exchanger 102.

  Since the refrigerant is slightly flammable, when the refrigerant leaks inside the indoor unit 100 and passes through the discharge part of the electrostatic precipitator 116, there is a risk of ignition by the discharge energy.

  HFO-1234yf used for the air conditioner in the present embodiment is heavier than air at room temperature and normal pressure, and the refrigerant leaked from the indoor heat exchanger 102 or the piping falls.

  Therefore, in the air conditioner according to the present embodiment, the electric dust collector 116 is positioned higher than the indoor heat exchanger 102 in order to prevent the refrigerant from reaching the electric dust collector 116 even if refrigerant leakage occurs. It is arranged. In order for the leaked refrigerant to reach the electric dust collector 116, it is discharged into the room and circulates and returns via the main body grill 105 and the air filter 107, or stays in the indoor unit 100 and overflows. .

However, if the indoor blower 101 is in an operating state, the leaked refrigerant is sucked together with air from the air side of the indoor heat exchanger 102, mixed, and sent out indoors from the outlet 109, so that it stays inside the indoor unit 100. Never overflow. In order for the refrigerant to reach the electrostatic precipitator 116, it needs to circulate and return, and since there is a significant amount of leakage, it will ignite and the risk of ignition is further reduced. Therefore, the electric dust collector 116 may be discharged only when the indoor blower 101 is in an operating state.

  Then, the refrigerant that has returned through circulation is diluted, and the gas sensor 108 detects the leaked refrigerant, so that the discharge is stopped before the discharge part ignites, and the ignition of the leaked refrigerant is avoided.

(Embodiment 2)
FIG. 2 is a configuration diagram of an air conditioner according to Embodiment 2 of the present invention, and FIG. 3 is a view as viewed from the direction of arrow A in FIG. In addition, the same code | symbol is attached | subjected to the same part as the air conditioner in the said Embodiment 1, and the description is abbreviate | omitted.

  As shown in FIGS. 2 and 3, the air conditioner according to the present embodiment includes an electric dust collector 116 as a discharging means between the air filter 107 and the indoor heat exchanger 102, and the electric dust collector A refrigerant shielding partition wall 117 is provided so as to separate the device 116 from a portion where the piping at the end of the indoor heat exchanger 102 is exposed and a piping portion where other refrigerant piping is gathered. In the lower part of the indoor heat exchanger 102, a gas sensor 108 that detects the leaked refrigerant is arranged in the same manner as in the first embodiment.

  The refrigerant HFO-1234yf used by the air conditioner in the present embodiment is heavier than air at room temperature and normal pressure, and the refrigerant leaked from the indoor heat exchanger 102 or the piping basically drops. In the case of leakage at a place higher than the electrostatic precipitator 116, there is a possibility of reaching the precipitator 116 in the middle of dropping.

  Therefore, in the air conditioner according to the present embodiment, in order to prevent the refrigerant from reaching the electrostatic precipitator 116 even if refrigerant leaks, the heat exchanger end portion between the electrostatic precipitator 116 and the indoor heat exchanger 102 is used. A refrigerant shielding partition wall 117 is disposed as a refrigerant shielding means for separating the refrigerant piping section 122 (described later) and the refrigerant piping section 122. Therefore, in order for the leaked refrigerant to reach the electric dust collector 116, is it released into the room and circulated and returned via the main body grill 105 and the air filter 107, or stays in the indoor unit 100 and overflows? It is.

  If the indoor blower 101 is in an operating state, the leaked refrigerant is sucked together with air from the air side of the indoor heat exchanger 102, mixed, and sent out indoors from the outlet 109, so that it stays inside the indoor unit 100. Never overflow. In order for the refrigerant to reach the electrostatic precipitator 116, it needs to circulate and return, and since there is a considerable amount of leakage, it will ignite and the risk of ignition is further reduced. Therefore, the electric dust collector 116 may be discharged only when the indoor blower 101 is in an operating state.

  FIG. 3 is a view taken in the direction of arrow A in FIG. 2. A refrigerant brazing partition 117 covers a pipe brazing part 118, which is one heat exchange end of the indoor heat exchanger 102, and an electric appliance is directly adjacent to it. A dust collector 116 is disposed.

  When the refrigerant leaks at the pipe brazing part 118, the refrigerant shielding partition wall 117 prevents the refrigerant from flowing into the electric dust collector 116, and the refrigerant moves away from the electric dust collector 116 as indicated by an arrow 120.

As for the U-bending portion 119 on the opposite side of the refrigerant shielding partition wall 117, if the indoor fan 101 is in an operating state, even if the refrigerant leaks, it is sucked into the indoor heat exchanger 102 as indicated by the arrow 121, and the electric dust collector 116 Since it does not reach directly, it has an inexpensive configuration in which no refrigerant shielding means is provided.

  The refrigerant that has returned through circulation has been diluted, and the gas sensor 108 detects the leaked refrigerant, so that the discharge is stopped before the discharge part ignites, and the ignition of the leaked refrigerant is reliably avoided. The

(Embodiment 3)
FIG. 4 shows a configuration diagram of an air conditioner according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the same part as the air conditioner in the said embodiment, and the description is abbreviate | omitted.

  In FIG. 4, the air conditioner in the present embodiment is equipped with an electrostatic atomizer 130, which uses a discharge phenomenon to charge fine water droplets to create electrostatic mist and spray it into the room. It is possible to remove odor components contained in indoor air and odor components attached to walls, floors, curtains and the like.

  In the electrostatic atomizer 130, the blower fan 131 takes in the air to be processed from the suction duct 114, which is an air suction means, passes through the heat dissipation part 111 of the Peltier element, and is discharged by the electrostatic atomization unit 112, which is the discharge means. Electrostatic mist is produced by the acquisition and discharge of condensed water by the element, and is released into temperature-controlled air through a silencer 113 and an exhaust duct 115 for suppressing sound, and is dispersed in the room.

  Therefore, when a mixed gas of refrigerant and air in the combustible region is supplied to the electrostatic atomization unit 112, there is a risk of ignition by discharge energy.

  HFO-1234yf used by the air conditioner in the present embodiment is heavier than air at room temperature and normal pressure, and the refrigerant leaked from the indoor heat exchanger 102 or piping falls.

  Therefore, in the air conditioner in the present embodiment, the air intake port 114a of the suction duct 114 is arranged at a position higher than the indoor heat exchanger 102 so that the refrigerant is not sucked even if the refrigerant leaks. Yes.

  As a result, it discharges to the air which does not contain a refrigerant above the indoor heat exchanger 102 and its associated piping. The leaked refrigerant is sucked from the suction duct 114 once it is discharged into the room and circulates and returns through the main body grill 105 and the air filter 107 or stays in the indoor unit 100 and overflows.

  If the indoor blower 101 is in an operating state, the leaked refrigerant is sucked together with air from the air side of the indoor heat exchanger 102, mixed, and sent out indoors from the outlet 109, so that it stays inside the indoor unit 100. Never overflow. In order for the refrigerant to reach the electrostatic atomization unit 112 of the electrostatic atomizer 130, it must circulate and return, and it will not ignite until there is a significant amount of leakage. Sex is further reduced.

  And until the air taken in from the suction duct 114 becomes inflammable, the gas sensor 108 detects the leaked refrigerant and the discharge is stopped, so that ignition of the leaked refrigerant is avoided.

(Embodiment 4)
FIG. 5 is a configuration diagram of an air conditioner according to Embodiment 4 of the present invention, and FIG. 6 is a view as viewed in the direction of arrow B in FIG. In addition, the same code | symbol is attached | subjected to the same part as the air conditioner in the said embodiment, and the description is abbreviate | omitted.

  The air conditioner in the present embodiment is equipped with the electrostatic atomizer 130 described in the third embodiment.

  The refrigerant leaked from the indoor heat exchanger 102 or piping (not shown) falls because it is heavier than air. If leakage occurs at a position higher than the air intake port 114a of the suction duct 114 of the electrostatic atomizer 130, the electrostatic refrigerant of the electrostatic atomizer 130 that discharges and discharges the leaked refrigerant in the middle. There is a possibility of reaching the unit 112.

  Therefore, in the present embodiment, as shown in FIGS. 5 and 6, in order to prevent the refrigerant from being sucked even if the refrigerant leaks, the air intake port 114 a of the suction duct 114 and the indoor heat exchanger 102 A refrigerant shielding partition wall 117 serving as a refrigerant shielding means is disposed so as to separate the end portion and the refrigerant piping part 122.

  As a result, in order for the leaked refrigerant to reach the electrostatic atomization unit 112 of the electrostatic atomizer 130, it is discharged into the room and circulates and returns via the main body grill 105 and the air filter 107, or It is whether it stays inside the machine 100 and overflows.

  If the indoor blower 101 is in an operating state, the leaked refrigerant is sucked together with air from the air side of the indoor heat exchanger 102, mixed, and sent out indoors from the outlet 109, so that it stays inside the indoor unit 100. Never overflow.

  In order for the refrigerant to reach the electrostatic atomization unit 112 of the electrostatic atomizer 130, it is necessary to circulate and return, and since there is a considerable amount of leakage, it will be in a state where it will ignite. Is further reduced. Therefore, the electrostatic atomization unit 112 of the electrostatic atomizer 130 may be discharged only when the indoor blower 101 is in an operating state.

  FIG. 6 is a view taken in the direction of arrow A in FIG. 5, and the refrigerant brazing partition 117 covers the pipe brazing portion 118 of the indoor heat exchanger 102, and the air intake port 114 a of the suction duct 114 is disposed through the refrigerant shielding partition 117. Has been.

  When the refrigerant leaks at the pipe brazing part 118, the refrigerant shielding partition wall 117 prevents the refrigerant from flowing into the air intake port 114a of the suction duct 114, and the refrigerant flows into the air intake port 114a of the suction duct 114 as indicated by an arrow 120. Keep away from.

  With respect to the U-bending portion 119 on the opposite side of the refrigerant shielding partition wall 117, if the indoor fan 101 is in an operating state, even if the refrigerant leaks, it is sucked into the indoor heat exchanger 102 as indicated by the arrow 121 and is taken into the suction duct 114. Since it does not reach the opening 114a directly, it has an inexpensive configuration in which no refrigerant shielding means is provided.

  The refrigerant returned after circulation is diluted, and the gas sensor 108 detects the leaked refrigerant and the discharge is stopped until the air taken in from the suction duct 114 becomes a flammable state. Is definitely avoided.

  In the air conditioner in each of the above embodiments, HFO-1234yf is used as the refrigerant. However, even if it is HFO-1234ze or other HFO, the mixture containing HFO-1234yf or HFO-1234ze or other HFO is used. Even if it is a refrigerant, even if it is HFC-32, HFC-152a, other HFC, its mixed refrigerant, or a hydrocarbon refrigerant, the same effect is produced.

  Further, although a method of avoiding ignition by reducing the discharge energy is also conceivable, in this method, the dust collection performance and the effect of the electrostatic atomizer 130 are reduced, but according to the above embodiment, It is possible to avoid ignition without reducing the dust collection performance and the effect of the electrostatic atomizer 130.

  As described above, the air conditioner according to the present invention can provide an air conditioner that has a small environmental load, is safe, and has an additional function using discharge means. The additional function includes an electric dust collector. The present invention is not limited to electrostatic atomizers and electrostatic atomizers, and can be applied to all devices that use discharge phenomena such as sterilizers and ozone generators. Further, the present invention is not limited to an air conditioner, and can be widely applied to a separate type showcase, a refrigerator, and the like, and brings about an effect.

100 Indoor Unit 101 Indoor Blower (Blower Unit)
102 Indoor heat exchanger (heat exchange means)
103 Upper and lower blades 104 Movable panel 105 Main grille 106 Base frame 107 Air filter 108 Gas sensor (refrigerant detection means)
110 Intake port 112 Electrostatic atomization unit (discharge means)
114 Suction duct (air suction means)
116 Electric dust collector (discharge means)
117 Refrigerant shielding partition (refrigerant shielding means)
118 Pipe brazing part (heat exchanger end)
122 Refrigerant piping part 131 Blower fan (air suction means)

Claims (7)

An air conditioner using a flammable refrigerant, wherein the indoor unit disposed on the indoor side includes a refrigeration cycle component such as a heat exchange means and a refrigerant pipe containing the flammable refrigerant therein, and An air conditioner comprising discharge means for adding a function that cannot be obtained by the action of a refrigerant, and disposing the discharge means so as to discharge air above the refrigeration cycle component. The air conditioner according to claim 1, wherein the discharge means is arranged above the refrigeration cycle constituting body. The air conditioner according to claim 1, wherein the discharge means includes air suction means for acquiring air to be discharged from above the refrigeration cycle constituting body. An air conditioner using a flammable refrigerant, wherein the indoor unit disposed on the indoor side includes a refrigeration cycle component such as a heat exchange means and a refrigerant pipe containing the flammable refrigerant therein, and A refrigerant shield for separating a discharge means for adding a function that cannot be obtained by the action of the refrigerant, and a refrigerant pipe portion including a heat exchange end portion where a refrigerant pipe at an end portion of the discharge means and the heat exchange means is exposed. An air conditioner characterized by comprising means. An air conditioner using a flammable refrigerant, wherein the indoor unit disposed on the indoor side includes a refrigeration cycle component such as a heat exchange means and a refrigerant pipe containing the flammable refrigerant therein, and Discharge means for adding a function that cannot be obtained by the action of the refrigerant, air suction means for the discharge means to acquire air to be discharged, an air intake port of the air suction means, and an end of the heat exchange means An air conditioner comprising a refrigerant shielding means for separating a refrigerant pipe portion including a heat exchange end portion from which a refrigerant pipe of the portion is exposed. It has a ventilation means which sends out the air heat-exchanged by the heat exchange means, and only when the ventilation means is operating, a discharge means operates, The any one of Claims 1-5 characterized by the above-mentioned. Air conditioner. Inside the indoor unit, a refrigerant detection means for detecting the leaked refrigerant is arranged below the discharge means or the intake port for taking in air to be discharged, and the discharge means is driven only when there is no refrigerant leakage. The air conditioner according to any one of claims 1 to 6, wherein the air conditioner is characterized.