JP2005249336A - Air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioner capable of being mounted without washing existing pipes even under the conditions that foreign matters including a great amount of compressor wear debris, oil degraded materials and strong acid reside in internal and external connection pipes of the air-conditioner. <P>SOLUTION: A refrigerating cycle has a plurality of strainers arranged in a refrigerant circuit and a compressor, a four-way valve, a condenser, a first electronic expansion valve, a liquid storage mechanism, a second electronic expansion valve, a liquid pipe, an evaporator, a gas pipe, and a four-way valve arranged therein in sequence. A dryer filter is provided between the second electronic expansion valve and the liquid pipe for trapping the foreign matters including compressor wear debris and oil degraded materials remained in the existing pipes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention makes it possible to attach existing piping without cleaning even under conditions where a large amount of wear particles from the compressor, degraded oil, and strong acids such as strong acids remain in the internal and external connection piping of the air conditioner. It is to provide an air conditioner.

  The conventional refrigeration cycle of the first air conditioner includes a compressor, a four-way valve, a condenser, a first electronic expansion valve, a liquid storage mechanism, a second electronic expansion valve, a liquid pipe, an evaporator, a gas pipe, and a low pressure. A refrigerant circuit is configured with a side heat exchanger, and a plurality of strainers are installed in the circuit, and the strainers protect the distribution capillaries of the condenser / evaporator and the electronic expansion valve. Therefore, usually 30-100 mesh is used.

  And if there is no failure history of the compressor and the outdoor unit can be operated, the refrigeration oil remaining in the extension pipe to be reused is forcibly cooled to manage it below the reference level, and the pump down operation Collect the refrigerant in the outdoor unit. Alternatively, when there is a failure history, the old refrigerant is recovered using a dedicated recovery device, and the indoor / outdoor unit is removed. (For example, see Patent Document 1)

In addition, the second conventional air conditioner refrigeration cycle includes a compressor, a four-way valve, a condenser, an electronic expansion valve, a liquid pipe, an evaporator, a gas pipe, an accumulator, activated carbon, and molecular sieves. A plurality of strainers installed in the circuit, and 30-100 mesh is similarly used for the strainers. (For example, see Patent Document 2)
JP2001-174091 (FIG. 1) JP 2003-279199 A (FIG. 1)

  Next, in conventional refrigeration cycles for air conditioners, compressor malfunctions due to strong acids such as organic and inorganic acids remaining in existing pipes, and large amounts of wear powder and refrigeration oil degradation products are installed in the refrigeration cycle. Since the strainer is clogged, when the compressor breaks down, the existing piping is cleaned with a special cleaning machine that uses R22 as a cleaning agent to remove foreign matter, and then a new air conditioner is installed. In this way, even when the compressor breaks down, it takes about 3 hours to complete the work, even if it is relatively easy to remove the old indoor unit / outdoor unit. There was a huge problem.

  The present invention has been made to solve such problems, and an object of the present invention is to efficiently recover foreign matters such as compressor wear powder and deteriorated oil remaining in existing piping.

  An air conditioner according to the present invention has a plurality of strainers arranged in a refrigerant circuit, and includes a compressor, a four-way valve, a condenser, a first electronic expansion valve, a liquid storage mechanism, a second electronic expansion valve, and a liquid pipe. A refrigerating cycle in which an evaporator, a gas pipe, and a four-way valve are sequentially connected, and a dryer filter, an organic acid, and an inorganic acid for the purpose of capturing foreign matter between the second electronic expansion valve and the liquid pipe , Installed with activated carbon filter for capturing chlorine, etc.

  An air conditioner according to the present invention includes a plurality of strainers arranged in a refrigerant circuit, and a compressor, a four-way valve, a condenser, a first electronic expansion valve, a liquid storage mechanism, a second electronic expansion valve, A refrigeration cycle in which a liquid pipe, an evaporator, a gas pipe, a four-way valve, and a low-pressure side heat exchanger are sequentially connected and arranged for the purpose of capturing foreign matter between the second electronic expansion valve and the liquid pipe. A dryer filter and an activated carbon filter for capturing organic acids, inorganic acids, chlorine, etc. are installed.

  An air conditioner according to the present invention has a plurality of strainers arranged in a refrigerant circuit, and includes a compressor, a four-way valve, a condenser, a first electronic expansion valve, a liquid storage mechanism, a second electronic expansion valve, and a liquid pipe. A refrigerating cycle in which an evaporator, a gas pipe, and a four-way valve are sequentially connected, and a dryer filter, an organic acid, and an inorganic acid for the purpose of capturing foreign matter between the second electronic expansion valve and the liquid pipe Since the activated carbon filter for trapping chlorine, etc. is installed, without causing the existing piping to be cleaned, compressor failure due to strong acid or chlorine content, or strainer clogging due to worn powder or deteriorated refrigeration oil will not occur. It is possible to provide an air conditioner that can be attached, and to reduce time, load, and cost when attaching a new unit.

  An air conditioner according to the present invention includes a plurality of strainers arranged in a refrigerant circuit, and a compressor, a four-way valve, a condenser, a first electronic expansion valve, a liquid storage mechanism, a second electronic expansion valve, A refrigeration cycle in which a liquid pipe, an evaporator, a gas pipe, a four-way valve, and a low-pressure side heat exchanger are sequentially connected and arranged for the purpose of capturing foreign matter between the second electronic expansion valve and the liquid pipe. Because it is configured to install a dryer filter and an activated carbon filter for trapping organic acids, inorganic acids, chlorine, etc., copper oxide generated when welding spatter, heat exchangers and pipes that were generated when the compressor was manufactured In addition to preventing clogging of refrigerant circuit components such as four-way valves and electronic expansion valves due to foreign substances such as, it also captures the deterioration of refrigeration oil that occurs during long-term operation and improves the reliability of the air conditioner Can be improved.

Embodiment 1 FIG.
FIG. 1 shows an example of a refrigerant circuit configuration of an air conditioner according to Embodiment 1 of the present invention. In the figure, a compressor 1, a four-way valve 2, a condenser 3, a first electronic expansion valve 4, a liquid storage mechanism 5, a second electronic expansion valve 6, a liquid pipe 7, an evaporator 8, a gas pipe 9 and a low pressure side. The heat exchanger 10 constitutes a refrigerant circuit. The plurality of strainers 11 includes a first strainer 11a between the condenser 3 and the first electronic expansion valve 4, a second strainer 11b between the liquid storage mechanism 5 and the second electronic expansion valve 6, and a third strainer 11c. Are respectively disposed between the gas pipe 9 and the four-way valve 2.

  The dryer filter main body 12 is installed between the second electronic expansion valve 6 and the liquid pipe 7, and its structure is a connection that closes the cylindrical body 12a and the left and right openings of the cylindrical body 12a as shown in FIG. An outer shell is formed from a pair of lids 12c provided with a hole 12b in the center, and an adsorbent 12d such as activated alumina or molecular sieves that adsorbs a strong acid such as an organic acid / inorganic acid in the center and the adsorption on the outside. A fibrous structure 12e such as glass wool is provided so as to surround the material 12a, and the adsorbent 12d and the fibrous structure 12e such as glass wool are fixed to the left and right by a fixing member 12g having an opening / closing valve 12f at the center. The refrigerant structure 12e and the adsorbent 12d are fixed so as to form a refrigerant passage 12h between the tubular structure 12a and the refrigerant passage 12h in one direction. A control valve 12i for controlling the refrigerant flow path 12j flowing into the opening / closing valve 12f at the center of the fixing member 12g to flow in from the one connection hole 12b and to discharge from the other connection hole 12b is provided on the left and right sides of the refrigerant passage 12h. .

  Here, the meshes of the first, second, and third strainers 11a, 11b, and 11c, which are the strainers 11 installed in the circuit, are usually 30 to 100 mesh, and are fibrous such as glass wool in the dryer filter 12. The foreign matter removal ability of the structure 12e and the first, second, and third strainers 11a, 11b, and 11c is 150 to 300 mesh in order to capture fine foreign matters circulating in the circuit. For example, 200 mesh is selected. It is preferable.

Thus, by making the filtration capacity of the dryer filter 12 higher than the filtration capacity of the first, second, and third strainers 11a, 11b, and 11c in the circuit, the first, second, and third in the circuit. Large foreign matters of 100 μm or more that clog the strainers 11a, 11b, and 11c can be captured by the dryer filter 12.

For example, the dryer filter 12 has a mechanism in which the flow direction using the plurality of on-off valves 12f and the fixed portion valve 12h flows from the outside to the inside as the refrigerant flow direction A. The foreign matter once captured at 12 is configured not to flow out into the circuit again.

Further, the adsorbent 12d such as activated alumina filled in the dryer filter 12 may adsorb the refrigerating machine oil additive. For example, 25 g per 1000 cc of the refrigerating machine oil enclosed in the air conditioner according to the present invention. Hereinafter, for example, it is preferable to keep about 10 g.

A pair of check valves 13 provided in series facing each other have one end connected between the first strainer 11a and the first electronic expansion valve 4, and the other end connected to the second strainer 11b and the second electron. It is provided in the first bypass passage 14 formed by connection with the expansion valve 6.

Further, the second bypass passage 15 having one end connected between the pair of check valves 13 of the first bypass passage 14 and the other end flowing into the liquid storage mechanism 5 includes an electromagnetic valve 16, an organic acid, an inorganic acid. The activated carbon filter 17 for capturing the chlorine content and the activated carbon filter 17 are sequentially installed. Since the activated carbon filter 17 can adsorb the strong acid and the chlorine content more efficiently through the liquid refrigerant, the activated carbon filter 17 It is preferable to install an expansion device 18 such as a capillary tube between the liquid storage mechanism 17 and the liquid storage mechanism 5.

  Further, an indoor suction temperature sensor 19 and an indoor blower 20 are installed in the indoor unit, and an outdoor suction temperature sensor 21 and an outdoor blower 22 are installed in the outdoor unit, and a liquid side blocking valve is provided between the liquid pipe 7 and the dryer filter 12. 23, a gas side blocking valve 24 is provided between the gas pipe 9 and the third strainer 11c.

The existing piping used in the refrigeration cycle in which the compressor is broken adheres strongly to strong acid, chlorine, etc., and may be peeled off by operating the air conditioner for a long time. It is preferable that the valve 4 or the second electronic expansion valve 6 and the electromagnetic valve 16 are controlled to open for a predetermined time every predetermined time, for example, to open for about 30 minutes every 1000 hours, and to allow the refrigerant to pass through the activated carbon filter 17.

  Compressor wear powder remaining in the existing piping, refrigeration oil deterioration, strong acid, chlorine and other foreign matters remain in the existing piping when a malfunction occurs because they dissolve in the refrigerant or move together with the refrigerant. Depending on the amount of refrigerant to be used, a large amount of foreign matter remains on the liquid pipe 5 side. In order to prevent foreign matter from flowing out into the refrigerant circuit, the air conditioner of the present invention forces the heating operation in the initial operation so as to be captured by the dryer filter 12 installed between the second electronic expansion valve 6 and the liquid pipe 7. Do.

  FIG. 3 shows a control image diagram of each mechanism during forced initial heating operation of the air conditioner according to Embodiment 1 of the present invention. As a method for forcibly performing the heating operation, the controller 25 monitors, for example, the compressor ON / OFF count, and when the ON / OFF count is 0, from the indoor suction sensor 19 installed in the indoor unit. By simply storing the intake temperature in the control mechanism and setting the intake temperature to a temperature lower than the set temperature, it is always within 30 minutes at the first operation by pressing the indoor remote control. A command is transmitted to the four-way valve 2 so that the heating operation is forcibly performed. When the heating trial operation time ends, the operation is automatically changed to the operation set when the indoor remote controller is pressed.

  Here, the compressor ON / OFF count monitored by the control unit 25 can be substituted by the compressor operation accumulated time. When the compressor operation accumulated time is 0, the initial forced heating operation is similarly performed. To do. The strong acid and chlorine content is controlled to pass through the activated carbon filter 17 by transmitting a command to fully close the second electronic expansion valve 6 and open the electromagnetic valve 16 from the control unit during the initial heating operation.

  Further, forcibly performing the initial heating trial operation in the severe heat season may raise the temperature and pressure of the discharge gas of the compressor 1. For example, the indoor suction temperature sensor 19 and the outdoor suction temperature sensor 21 may be used to The temperature and the outdoor temperature are detected. For example, the discharge gas is detected based on the threshold values of the indoor temperature and the outdoor temperature as shown in FIG. 4 representing the control threshold value of each circuit component during the initial heating operation of the air conditioner. The control method for the compressor 1, the indoor blower 20, and the outdoor blower 22 is changed according to the control method of each circuit component for reducing the temperature and pressure rise and the indoor / outdoor temperature conditions.

  Here, the threshold value table shown in FIG. 4 will be described. When the detected temperature detected by the indoor suction temperature sensor 19 and the outdoor suction temperature sensor 20, for example, the indoor temperature is 25 ° C. or lower and the outdoor temperature is 30 ° C. or lower, the compressor is normally controlled, the indoor blower is stopped, and the outdoor blower is Normal control. When the indoor temperature is 25 ° C. or higher and the outdoor temperature is 30 ° C. or lower, the compressor is normally controlled, the indoor blower has the minimum air flow, and the outdoor blower has the medium air flow. When the indoor temperature is 25 ° C. or lower and the outdoor temperature is 30 ° C. or higher, the compressor is normally controlled, the indoor fan is at the minimum air volume, and the outdoor fan is stopped. When the indoor temperature is 25 ° C. or higher and the outdoor temperature is 30 ° C. or higher, the compressor is operated at the lowest frequency, the indoor fan is in the middle air volume, and the outdoor fan is stopped.

  The indoor suction temperature sensor 19 and the outdoor suction temperature sensor 20 are assumed to be operated by a plurality of other temperature sensors or pressure sensors (none of which are shown) installed in the indoor unit and the outdoor unit. a temperature-outdoor temperature conditions, measured happens to any temperature and pressure conditions in advance, by previously inputted as a threshold, it can be substituted by the temperature sensor or the pressure sensor.

During this initial heating operation, since a relatively small amount of foreign matter remaining in the gas pipe 9 passes through the indoor unit, the indoor distributor strainer 26 is not installed, or a coarser one than # 50 that is not clogged by foreign matter is used. It is preferable.

  Next, the installation work flow of the air conditioner of this invention is demonstrated using FIG. First, start in Step 1 in the figure. In Step 2, when there is no failure history of the compressor and the outdoor unit can be operated, YES is selected. Next, in Step 3, the pump-down operation for closing the liquid side blocking valve 23 and collecting the refrigerant to the outdoor unit side is performed, the old refrigerant in the old refrigeration cycle is collected by the outdoor unit, and the gas side blocking valve 24 is closed.

  Next, in Step 4, the old indoor unit / outdoor unit is removed and the new indoor unit / outdoor unit is attached. After that, as in the conventional air conditioner, in Step 5, the evacuation is performed for 30 minutes, in Step 6, the liquid side blocking valve 23 and the gas side blocking valve 24 are opened, and after additional refrigerant charging as required, in Step 7, Although a trial operation is performed, a forced heating operation is performed in the present invention. Finally, in Step 8, the process shifts to remote control setting automatic operation, and ends in Step 9.

  Further, in Step 2 in FIG. 5, if there is a compressor failure history and the outdoor unit cannot be operated, the process proceeds to NO. Next, at Step 10, since the pump-down operation cannot be performed when the compressor is broken, the liquid side blocking valve 23 and the gas side blocking valve 24 are closed, and the old refrigeration cycle in the old refrigeration cycle is closed using a dedicated recovery device. After collecting the refrigerant, the old indoor unit / outdoor unit is removed at Step 11 and replaced with a new indoor unit or an outdoor unit. Thereafter, similar to the conventional air conditioner, the process from Step 5 to Step 9 is performed after evacuation.

  However, even if the compressor has not failed, if the liquid side blocking valve 23 and the gas side blocking valve 24 are closed and the refrigerant recovery operation can be performed to shorten the time, YES is set at Step 2 The refrigerant recovery operation may be performed by selecting and proceeding to Step 3.

Embodiment 2. FIG.
FIG. 6 shows an example of a refrigerant circuit configuration of an air conditioner according to Embodiment 2 of the present invention. In the figure, a compressor 1, a four-way valve 2, a condenser 3, a first electronic expansion valve 4, a liquid storage mechanism 5, a second electronic expansion valve 6, a liquid pipe 7, a dryer filter 12, an evaporator 8, and a gas pipe. 9 and the low-pressure side heat exchanger 10 constitute a refrigerant circuit. The plurality of strainers 11 includes a first strainer 11a between the condenser 3 and the first electronic expansion valve 4, a second strainer 11b between the first electronic expansion valve 4 and the liquid storage mechanism 5, and a third strainer 11c. Is disposed between the liquid storage mechanism 5 and the second electronic expansion valve 6, and a fourth strainer 11 d is disposed between the gas pipe 9 and the four-way valve 2.

In addition, an oil separator 27 to the compressor suction pipe 1b side is disposed in the compressor discharge pipe 1a between the compressor 1 and the four-way valve 2, and an electromagnetic valve 16, an activated carbon filter 17, and a throttle device 18 such as a capillary tube are sequentially arranged in series. It is possible to obtain the same effect as the refrigerant circuit described in the first embodiment by providing the oil return circuit 28 disposed in the same manner as in the first embodiment. It is preferable to open and flow into the activated carbon filter 17.

  FIG. 7 is a control image diagram showing the contents of commands to each mechanism during the initial heating operation of the air conditioner according to Embodiment 2 of the present invention. As a method for forcibly performing the heating operation, the controller 25 monitors, for example, the compressor ON / OFF count, and when the ON / OFF count is 0, from the indoor suction sensor 19 installed in the indoor unit. By simply storing the intake temperature in the control mechanism and setting the intake temperature to a temperature lower than the set temperature, by pressing an indoor remote controller (not shown), it is always within 30 minutes, for example, In the 10-minute heating trial operation, a command is sent to the four-way valve 2, and when the heating trial operation time is over, the operation is automatically changed to the one set when the indoor remote control is pressed so as to force the heating operation. Keep it.

  Here, the compressor ON / OFF count monitored by the control unit 25 can be substituted by the compressor operation accumulated time. When the compressor operation accumulated time is 0, the initial forced heating operation is similarly performed. To do. For the strong acid and chlorine content, the control unit 25 controls the second electronic expansion valve 6 to pass through the activated carbon filter 17 by sending a command for normal control / opening the electromagnetic valve 16 during the initial heating operation. .

  Thus, as in the first embodiment, the operation command similar to the first embodiment is transmitted to the compressor 1, the four-way valve 2, the electromagnetic valve 14, the indoor blower 20, and the outdoor blower 22 by determining the outdoor suction temperature. Let the first heating operation.

Embodiment 3 FIG.
FIG. 8 shows an example of a refrigerant circuit configuration of an air conditioner according to Embodiment 3 of the present invention. In the figure, a compressor 1, a four-way valve 2, a condenser 3, a check valve bridge circuit 29, a first expansion valve 4, a liquid storage mechanism 5, a second electronic expansion valve 6, a liquid pipe 7, an evaporator 8, and a gas A refrigerant circuit is constituted by the pipe 9 and the low-pressure heat exchanger 10. In the plurality of strainers, the first strainer 11a is between the condenser 3 and the check valve bridge circuit 27, the second strainer 11b is between the first expansion valve 4 and the liquid storage mechanism 5, and the third strainer 11c is a liquid storage mechanism. A fourth strainer 11 d is disposed between the gas pipe 9 and the four-way valve 2 between the second electronic expansion valve 6 and the second electronic expansion valve 6.

Moreover, the same effect as the refrigerant circuit of Embodiment 1 can be acquired by arrange | positioning the solenoid valve 16, the activated carbon filter 17, and the capillary tube 18 one by one in the 2nd bypass path 30 which bypasses the 1st electronic expansion valve 4. FIG. As in the first embodiment, it is preferable that the solenoid valve 16 is opened for a certain period of time for a certain period of time to flow into the activated carbon filter 17.

  FIG. 9 is a control image diagram showing the contents of commands to each mechanism during the initial heating operation of the air conditioner according to Embodiment 3 of the present invention. As a method for forcibly performing the heating operation, the controller 25 monitors, for example, the compressor ON / OFF count, and when the ON / OFF count is 0, from the indoor suction sensor 19 installed in the indoor unit. By simply storing the intake temperature in the control mechanism and setting the intake temperature to a temperature lower than the set temperature, it is always within 30 minutes at the first operation by pressing the indoor remote control. A command is transmitted to the four-way valve 2 so that the heating operation is forcibly performed. When the heating trial operation time ends, the operation is automatically changed to the operation set when the indoor remote controller is pressed.

  Here, the compressor ON / OFF count monitored by the control unit 25 can be substituted by the compressor operation accumulated time. When the compressor operation accumulated time is 0, the initial forced heating operation is similarly performed. To do. For the strong acid and chlorine content, the control unit 25 controls the first electronic expansion valve 6 to be fully closed and the electromagnetic valve 16 to be opened by transmitting a command to pass the activated carbon filter 17 during the initial heating operation. .

  In the third embodiment of the present invention, the compressor 1, the four-way valve 2, the electromagnetic valve 16, the indoor blower 20, and the outdoor blower 22 are the same as in the first embodiment by determining the outdoor suction temperature as in the first embodiment. A full-close command is transmitted to the operation command and the first electronic expansion valve 4 to perform the initial heating operation.

Embodiment 4 FIG.
FIG. 10 shows an example of a refrigerant circuit configuration of an air conditioner according to Embodiment 4 of the present invention. In the figure, a compressor circuit, a four-way valve 2, a condenser 3, an electronic expansion valve 4, a liquid pipe 7, an evaporator 8, a gas pipe 9, and an accumulator 5a constitute a refrigerant circuit. The plurality of strainers 11 are disposed between the condenser 3 and the electronic expansion valve 4, between the electronic expansion valve 4 and the liquid pipe 7, and between the gas pipe 9 and the four-way valve 2, respectively. The oil separator 27 is installed between the compressor 1 and the four-way valve 2, and the outlet side 27 a is connected in the middle of the piping between the accumulator 5 a and the compressor 1. Further, one end of an oil return circuit 28 constituted by arranging the solenoid valve 16, the activated carbon filter 17 and the capillary 18 in series is connected to the outlet side 25 a of the oil separator 25, and the other end is an accumulator of the oil separator 27. It is connected to a pipe on the way between the 5a side connecting portion 25b27 and the compressor 1.

  In the refrigerant circuit of the air conditioner according to the present invention, it is possible to obtain the same effect as that of the refrigerant circuit described in the first embodiment. As in the first embodiment, the electromagnetic valve 16 is set at a certain time every certain time. It is preferable to open and flow into the activated carbon filter 17.

  FIG. 11 is a control image diagram showing the contents of commands to each mechanism during the initial heating operation. As a method for forcibly performing the heating operation, the controller 25 monitors, for example, the compressor ON / OFF count, and when the ON / OFF count is 0, from the indoor suction sensor 19 installed in the indoor unit. By simply storing the intake temperature in the control mechanism and setting the intake temperature to a temperature lower than the set temperature, it is always within 30 minutes at the first operation by pressing the indoor remote control. A command is transmitted to the four-way valve 2 so that the heating operation is forcibly performed. When the heating trial operation time ends, the operation is automatically changed to the operation set when the indoor remote controller is pressed.

  Here, the compressor ON / OFF count monitored by the control unit 25 can be substituted by the compressor operation accumulated time. When the compressor operation accumulated time is 0, the initial forced heating operation is similarly performed. To do. With respect to the strong acid and the chlorine content, control is performed so that the activated carbon filter 17 is passed by transmitting a command to open the electromagnetic valve 16 from the control unit 25 during the initial heating operation.

  In the refrigerant circuit of the air conditioner of the present invention, as in the first embodiment, the operation command is transmitted to the compressor 1, the four-way valve 2, the electromagnetic valve 16, the indoor blower 20, and the outdoor blower 22 by determining the outdoor suction temperature. Let the first heating operation.

It is a block diagram which shows the refrigerant circuit of the air conditioner in Embodiment 1 of this invention. It is a schematic structure sectional view of a dryer filter used for a refrigerant circuit of an air harmony machine in Embodiment 1 of this invention. It is a control image figure of each mechanism at the time of the forced initial heating operation of the air conditioner in Embodiment 1 of this invention. It is a table | surface which shows the threshold value of control of each circuit component at the time of the initial stage heating operation of the air conditioner in Embodiment 1 of this invention. It is an installation work flow figure at the time of installing the air conditioner of this invention. It is a block diagram which shows the refrigerant circuit of the air conditioner in Embodiment 2 of this invention. It is a control image figure of each mechanism at the time of the forced initial heating operation of the air conditioner in Embodiment 2 of this invention. It is a block diagram which shows the refrigerant circuit of the air conditioner in Embodiment 3 of this invention. It is a control image figure of each mechanism at the time of the forced initial heating operation of the air conditioner in Embodiment 3 of this invention. It is a block diagram which shows the refrigerant circuit of the air conditioner in Embodiment 4 of this invention. It is a control image figure of each mechanism at the time of the forced initial heating operation of the air conditioner in Embodiment 4 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Compressor, 2 Four way valve, 3 Condenser, 1st electronic expansion valve, 5 Liquid storage mechanism, 6 2nd electronic expansion valve, 7 Liquid piping, 8 Evaporator, 9 Gas piping, 10 Low pressure heat exchanger , 11 Strainer, 12 Dryer filter, 13 Check valve, 16 Solenoid valve, 17 Activated carbon filter, 18 Throttle mechanism, 19 Indoor suction temperature sensor, 20 Indoor blower, 21 Outdoor suction temperature sensor, 22 Outdoor blower, 23 Liquid side blocking valve , 24 gas side blocking valve, 25 control unit, 27 oil separator, 28 oil return circuit, 29 check valve bridge circuit.

Claims (16)

A plurality of strainers are arranged in the refrigerant circuit, and a compressor, a four-way valve, a condenser, a first electronic expansion valve, a liquid storage mechanism, a second electronic expansion valve, a liquid pipe, an evaporator, a gas pipe, and a four-way An air conditioner comprising a refrigeration cycle in which valves are sequentially arranged, and a dryer filter for capturing foreign matter and an activated carbon filter for capturing organic acid, inorganic acid, chlorine or the like in the refrigeration cycle. A plurality of strainers are arranged in the refrigerant circuit, and a compressor, a four-way valve, a condenser, a first electronic expansion valve, a liquid storage mechanism, a second electronic expansion valve, a liquid pipe, an evaporator, a gas pipe, and a four-way A refrigeration cycle in which a valve and a low-pressure side heat exchanger are sequentially arranged, a dryer filter for capturing foreign matter between the second electronic expansion valve and a liquid pipe, and an activated carbon filter for capturing organic acid, inorganic acid, chlorine, etc. An air conditioner characterized by the installation of A plurality of strainers are arranged in the refrigerant circuit, and the compressor, four-way valve, condenser, reverse valve bridge circuit, first electronic expansion valve, liquid storage mechanism, second electronic expansion valve, liquid piping, evaporator , A gas cycle, a four-way valve, a low-pressure side heat exchanger, and a refrigeration cycle that sequentially arranges a dryer filter for capturing foreign matter between the second electronic expansion valve and the liquid pipe, an organic acid, an inorganic acid, a chlorine content, etc. An air conditioner that is equipped with an activated carbon filter for trapping. A refrigeration cycle in which a plurality of strainers are arranged in a refrigerant circuit, and a compressor, a four-way valve, a condenser, an electronic expansion valve, a liquid pipe, an evaporator, a gas pipe, a four-way valve, and an accumulator are sequentially arranged, An air conditioner comprising a dryer filter for capturing foreign matter and an activated carbon filter for capturing organic acid, inorganic acid, chlorine, or the like between the electronic expansion valve and the liquid pipe. A dryer filter filled with at least one of activated alumina and molecular sieves for the purpose of capturing organic acid, inorganic acid, chlorine, and moisture is installed between the electronic expansion valve and the liquid pipe. The air conditioner of Claims 1-4. The air conditioner according to any one of claims 1 to 5, wherein an activated carbon filter for capturing organic acid, inorganic acid, and chlorine is installed in the refrigeration cycle. The air conditioner according to any one of claims 1 to 6, wherein an oil return circuit is installed in the compressor discharge section and the suction section. The air conditioner according to any one of claims 1 to 7, wherein a filtration capacity of a dryer filter installed in the refrigerant circuit is higher than a filtration capacity of a strainer installed in the refrigerant circuit. A fibrous structure such as glass wool is installed in a dryer filter installed in the refrigerant circuit, and the inflow direction of the refrigerant in the fibrous structure such as glass wool is always one direction. The air conditioner of 1-8. 10. The air according to claim 1, wherein the circuit in which the activated carbon filter is installed is capable of controlling the continuous inflow, the inflow for a predetermined time, and the intermittent inflow by a component capable of interrupting the circuit such as a solenoid valve. Harmony machine. An air conditioner characterized in that at least one of a compressor operating time or a compressor ON / OFF count is used as a determination condition as a determination for automatically performing an initial operation for capturing foreign matter. An air conditioner characterized in that heating operation is used for initial operation for capturing foreign matter. When performing heating operation to catch foreign matter during the summer heat wave, control the refrigerant frequency components such as the compressor frequency, indoor fan, outdoor fan, etc. to control the temperature and pressure rise of the compressor discharge gas. An air conditioner characterized by performing. When controlling the refrigerant circuit components such as the compressor frequency, the indoor fan, and the outdoor fan when performing the heating operation to capture the foreign matter, at least one of the temperature sensors attached to the indoor unit and the outdoor unit was used. An air conditioner characterized by that. When controlling the refrigerant circuit components such as the compressor frequency, indoor fan, outdoor fan, etc. when performing the heating operation to capture foreign matter, at least one of the plurality of pressure sensors attached to the indoor unit and the outdoor unit was used. An air conditioner characterized by that. An air conditioner characterized in that a new air conditioner can be installed without cleaning existing piping when a compressor mounted on the air conditioner breaks down.

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