CN110226070B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN110226070B CN110226070B CN201880008910.0A CN201880008910A CN110226070B CN 110226070 B CN110226070 B CN 110226070B CN 201880008910 A CN201880008910 A CN 201880008910A CN 110226070 B CN110226070 B CN 110226070B
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- heat exchange
- pressure regulator
- indoor unit
- indoor
- exchange area
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The indoor unit includes: a heat exchanger (5) having a 1 st heat exchange region (X) and a 2 nd heat exchange region (Y); and a pressure regulator (12) which is provided between the 1 st heat exchange region (X) and the 2 nd heat exchange region (Y) and regulates the pressure of the refrigerant. In addition, during heating operation, the 1 st heat exchange region (X) is set to the 1 st condensation temperature and the 2 nd heat exchange region (Y) is set to the 2 nd condensation temperature lower than the 1 st condensation temperature by decompression of the pressure regulator (12), and the heating system has a normal mode in which the pressure regulator (12) is fully opened to perform normal operation and a two-temperature mode in which the pressure regulator (12) is set to a predetermined throttle amount. Further, in the normal mode, when the temperature difference between the 1 st heat exchange area (X) and the 2 nd heat exchange area (Y) does not satisfy a predetermined condition, it is determined that the pressure regulator (12) is abnormal.
Description
Technical Field
The present invention relates to an air conditioner, and more particularly to an air conditioner having an abnormality detection device for a pressure regulator mounted on an indoor unit side.
Background
In general, in order to suppress noise and vibration transmission to the indoor space, a general air conditioner has a split structure in which devices that are large noise sources and vibration sources are disposed in an outdoor unit and devices that are small in noise and vibration are disposed in an indoor unit. As a main structure of a general split type air conditioner, an outdoor unit is provided with a compressor, an outdoor heat exchanger, an outdoor air blowing fan, a four-way valve, an expansion valve, and the like, and an indoor unit is provided with an indoor heat exchanger, an indoor air blowing fan, a control unit, and the like. The outdoor unit and the indoor unit are mechanically and electrically connected to each other by refrigerant piping and control wiring. The indoor unit of the split type air conditioner configured as described above is installed on an indoor wall surface or the like.
From the viewpoint of global environmental protection and global warming prevention in recent years, improvement in energy saving performance is required for air conditioners. In an air conditioner, in order to improve energy saving performance, energy efficiency of each device constituting the air conditioner is improved, and it is important to reduce power consumption of the entire device. Various air conditioners have been proposed in which, without excessive air conditioning for bringing the entire interior of a room to a desired temperature, air conditioning is performed for bringing at least a necessary region of the interior of the room to a desired temperature, thereby reducing power consumption.
For example, an air conditioner has been proposed which performs air conditioning of a room to be air-conditioned, which is centered on human consumption, and which can suppress excessive air conditioning and achieve power saving, and which can perform air conditioning that is comfortable for people present in the room (see, for example, patent document 1).
In this conventional air conditioner, an indoor unit is provided with an indoor heat exchanger having a 1 st heat exchange area and a 2 nd heat exchange area, and a pressure regulator provided between the 1 st heat exchange area and the 2 nd heat exchange area. Further, an indoor side fan for forming an air flow from the outlet after the air from the suction inlet is heat-exchanged by an indoor side heat exchanger, and a partition for partitioning the outlet into a 1 st outlet and a 2 nd outlet are provided. The air having undergone heat exchange in the 2 nd heat exchange area is mainly blown out from the 1 st air outlet, and the air having undergone heat exchange in the 1 st heat exchange area is mainly blown out from the 2 nd air outlet. In addition to the normal operation, air conditioning is performed in what is called a dual temperature mode in which air flows having different temperatures are formed from 2 air outlets, and the air conditioning is comfortable for people in a room. In this air conditioner, the opening and closing of the pressure regulator on the indoor unit side is controlled to change the refrigerant pressures in the 1 st heat exchange zone and the 2 nd heat exchange zone, thereby generating different temperatures in the respective zones. By performing heat exchange in a state where different temperatures are generated in the respective regions, airflows having different temperatures can be generated from the 2 blowoff ports.
The pressure regulator provided in this air conditioner is an electromagnetic valve whose opening degree can be adjusted to adjust the refrigerant flow path, and the opening degree of the electromagnetic valve can adjust the flow rate of the refrigerant to change the pressure of the refrigerant. In the normal mode, the pressure regulator is fully opened to apply no pressure to the 1 st heat exchange area and the 2 nd heat exchange area. In the dual temperature mode, the flow rate of the pressure regulator is adjusted to generate a pressure difference of the refrigerant between the 1 st heat exchange area and the 2 nd heat exchange area, thereby realizing the dual temperature mode. The opening degree of the regulator is adjusted by sending a control signal from a control unit of the indoor unit.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2018-25343
Disclosure of Invention
The air conditioner can perform air conditioning that is comfortable for people located indoors while suppressing excessive air conditioning and achieving power saving by blowing out the air that has been heat-exchanged in each of the 1 st heat exchange area and the 2 nd heat exchange area from the 2 air outlets. In order to perform air conditioning that is comfortable for people located indoors, the opening degree of a pressure regulator provided between the 1 st heat exchange area and the 2 nd heat exchange area is adjusted, thereby enabling transition to the dual temperature mode. However, the method described in patent document 1 does not relate to detection performed when an abnormality occurs in the pressure regulator.
However, the pressure regulator is an important component of the refrigeration cycle, and if a failure occurs, not only comfortable air conditioning cannot be obtained, but also a significant problem may occur in the operation itself, and detecting the failure of the pressure regulator is an extremely important problem for an air conditioner provided with the pressure regulator.
The invention provides an air conditioner capable of finding out abnormality of a pressure regulator when 2 heat exchanger regions cannot reach a set temperature in a dual-temperature mode.
The abnormality of the pressure regulator in the air conditioner according to the present invention is defined as a case where the refrigerant pressure does not become a set value in a state where the flow rate of the refrigerant changes according to the opening degree of the pressure regulator and the flow rate decreases from an instruction state on the indoor unit side. Specifically, for example, although a control signal indicating the pressure is output from the indoor unit side, the state is not indicated due to adhesion of a valve constituting the pressure regulator, a failure of a motor, or the like, and the opening degree is decreased. Alternatively, the pressure regulator is fully opened, but a foreign matter is interposed in the flow passage inside the pressure regulator, so that the flow rate is reduced. That is, a case where the control is performed in the normal mode but the control is performed in the dual temperature mode against the intention is referred to as an abnormal state. In addition, the abnormality judgment means to detect an abnormality of the pressure regulator as defined herein.
The air conditioner of the present invention includes a refrigerant circuit for circulating a refrigerant among a compressor, an indoor-side heat exchanger, a decompressor, and an outdoor-side heat exchanger, and is composed of an indoor unit and an outdoor unit. Further, the indoor unit includes: an indoor heat exchanger having a 1 st heat exchange region and a 2 nd heat exchange region; a pressure regulator disposed between the 1 st heat exchange area and the 2 nd heat exchange area for regulating the pressure of the refrigerant. The indoor unit further includes an indoor fan that exchanges heat in the indoor heat exchanger with air from an inlet port that is open in a part of the casing of the indoor unit, and generates an airflow that is blown out from an outlet port that is formed in another opening of the indoor unit. The indoor unit further includes a partition that partitions the discharge port into a 1 st discharge port on the front surface side and a 2 nd discharge port on the rear surface side with respect to the 1 st discharge port. The indoor unit includes a rear-side guide portion provided on a rear side of the indoor-side fan and guiding an airflow from the indoor-side fan to the 2 nd outlet; and a front-side guide portion provided on a front side of the indoor-side fan so as to face the rear-side guide portion, the front-side guide portion guiding an airflow from the indoor-side fan to the 1 st air outlet. In the heating operation, the 1 st heat exchange region is set to the 1 st condensation temperature by the pressure reduction of the pressure regulator, and the 2 nd heat exchange region is set to the 2 nd condensation temperature lower than the 1 st condensation temperature. A normal mode in which the pressure regulator is fully opened to perform normal operation; and a two-temperature mode in which the pressure regulator is set to a predetermined throttle amount, wherein in the normal mode, when the temperature difference between the 1 st heat exchange region and the 2 nd heat exchange region does not satisfy a predetermined condition, it is determined that the pressure regulator is abnormal.
That is, in the air conditioner of the present invention, the pressure regulator is provided between the 1 st heat exchange area and the 2 nd heat exchange area on the indoor unit side, and the normal mode and the two-temperature mode can be switched by adjusting the opening degree of the pressure regulator. However, in the normal mode operation, when the pressure regulator on the indoor unit side is fully opened, the temperature difference between the heat exchangers before and after the pressure regulator on the indoor unit side does not satisfy the predetermined condition, and at this time, it is determined that the pressure regulator is abnormal. That is, whether the pressure regulator is abnormal can be determined based on whether the normal mode can be returned.
The air conditioner of the invention can prevent error judgment about the failure cause when the valve is in failure, thereby avoiding replacement operation of the valve and improving service.
Drawings
Fig. 1 is a vertical sectional view showing a schematic configuration of an indoor unit of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a diagram showing a refrigerant passage of an air conditioner according to an embodiment of the present invention.
Fig. 3 is a block diagram of an air conditioner according to an embodiment of the present invention.
Fig. 4 is a flowchart for abnormality determination of the air conditioner according to the embodiment of the present invention.
Detailed Description
Hereinafter, an embodiment of an air conditioner according to an embodiment of the present invention will be described with reference to the drawings. Note that the same elements may be denoted by the same reference numerals, and the description thereof will be omitted when the description is repeated. For ease of understanding, the drawings mainly show the respective components.
The air conditioners according to the embodiments described below are all examples of the air conditioner according to the present invention, and the numerical values, shapes, configurations, steps, and the order of the steps shown in the embodiments are examples, and the present invention is not limited to these examples. In the present specification, the left-right direction refers to the left-right direction of a device or apparatus facing a subject. Among the components of the following embodiments, components that are not recited in the independent claims representing the uppermost concept will be described as arbitrary components. In all the embodiments, the configurations other than the modified portions of the respective modified examples are the same, and the effects of the respective configurations can be achieved by combining the configurations described in the respective modified examples.
Further, although a specific configuration is described in the air conditioner of the following embodiment, the present invention is not limited to the specific configuration of the following embodiment, and includes various air conditioners to which a configuration based on the same technical idea is applied.
(embodiment mode)
The air conditioner according to the embodiment is a so-called split type air conditioner in which an indoor unit and an outdoor unit are connected to each other by a refrigerant pipe, a control wiring, and the like. The indoor unit and the outdoor unit constitute a heat pump, and the outdoor unit is provided with a compressor. The indoor unit of the air conditioner according to the present embodiment is a wall-mounted indoor unit attached to an indoor wall surface.
Fig. 1 is a vertical sectional view showing a schematic configuration of an indoor unit of an air conditioner according to the present embodiment. The air conditioner of the present embodiment shown in fig. 1 shows one state during the air conditioning operation.
As shown in fig. 1, the indoor unit 1 includes an upper surface opening 2a, which is an air inlet formed in an upper portion of the indoor unit 1, and a blowout port 2b, which is a blowout port for blowing out air that has exchanged heat inside the indoor unit 1. Further, an air direction louver unit 3 as an air direction changing device that opens and closes the air outlet 2b and can adjust the air outlet direction in the vertical direction and the horizontal direction is provided in the air outlet 2b formed in the lower portion of the indoor unit 1. The wind direction louver unit 3 includes vertical wind direction louvers 30 each including a plurality of louvers for vertically changing the wind direction, and horizontal wind direction louvers 40 each including a plurality of louvers for horizontally changing the wind direction.
The indoor unit 1 is provided with a filter 4 for removing dust contained in the indoor air, and an indoor-side heat exchanger 5 for exchanging heat with the indoor air taken in through the filter 4 from the upper surface opening 2 a. Further, an indoor fan 6 for forming an airflow to be blown out into the room from the air outlet 2b after the air sucked in from the air inlet as the top surface opening 2a is heat-exchanged by a heat exchanger 5 is provided inside the indoor unit 1. As the indoor side fan 6, for example, a cross flow fan of a horizontal cylindrical shape which generates a circumferential airflow is used. As shown in fig. 1, the indoor-side heat exchanger 5 is provided so as to surround substantially three directions of the front surface side, the front upper side, and the rear surface side, in addition to the blowing direction below the indoor-side fan 6, and is formed in a substantially inverted V shape. Includes a back-face side heat exchange portion 5a, a front-face upper side heat exchange portion 5b, and a front-face lower side heat exchange portion 5 c.
Further, in the indoor unit 1, the air passage 7 extending from the downstream side of the indoor-side fan 6 to the air outlet 2b includes a rear guide 8 as a rear-side guide, a stabilizer 9 as a front-side guide, and two side wall surfaces (not shown). The rear guide 8 is a rear-side guide portion that is disposed downstream of the indoor-side fan 6, is provided on the rear side, and has a function of guiding the airflow on the rear side to the outlet 2 b. The stabilizer 9 is a front guide portion provided on the front side of the indoor fan 6 so as to face the rear guide 8, and has a function of stably guiding the airflow on the front side of the decorative ventilation path 7. The two side wall surfaces form two side surfaces of the indoor unit 1. The stabilizer 9 as a front-side guide portion forms the outlet 2b together with the rear guide 8 as a rear-side guide portion, and has a function of guiding the airflow from the indoor-side fan 6 to the outlet 2 b. A front panel 2c is provided on the front surface of the indoor unit 1, and the front panel 2c is configured to be openable for replacement, cleaning, and the like of the filter 4 and the like inside the indoor unit 1.
The components that operate in the air conditioner of the present embodiment, including at least the louver assembly 3 and the indoor fan 6, are configured and operated by the control unit 50 provided in the indoor unit 1.
[ Structure of refrigerant Circuit ]
Fig. 2 is a diagram schematically showing a refrigerant circuit of the air conditioner according to the present embodiment. In the air conditioner of the present embodiment, the indoor heat exchanger 5 is disposed in a substantially inverted V shape so as to surround substantially three sides of the front lower side, the front upper side, and the rear side in addition to the blowing direction below the indoor fan 6. The heat exchanger 5 includes a 1 st heat exchange region X including the rear-side heat exchange portion 5a and the front-side upper heat exchange portion 5b, and a 2 nd heat exchange region Y including the front-side lower heat exchange portion 5 c. As shown in the refrigerant circuit of fig. 2, a pressure regulator 12 for regulating the pressure of the refrigerant is provided in the refrigerant line between the 1 st heat exchange region X and the 2 nd heat exchange region Y. In the present embodiment, the pressure regulator 12 during the heating operation functions as an expansion valve that reduces the refrigerant pressure. Further, by using a valve having a low pressure loss of the same level as that of the straight pipe when fully opened as the expansion valve, it is possible to prevent a decrease in efficiency when performing a normal heating operation or a normal cooling operation. The pressure regulator 12 is also controlled by the controller 50 to operate in the same manner as the indoor fan 6.
As shown in fig. 2, the refrigerant circuit of the air conditioner of the present embodiment is configured such that an electric four-way valve 14 is connected to the discharge side of the compressor 13, and the refrigerant discharged from the compressor 13 during the heating operation is sent to the rear-side heat exchange portion 5a and the front-side upper heat exchange portion 5b of the heat exchanger 5. The refrigerant sent to the rear-side heat exchange portion 5a and the front-side upper heat exchange portion 5b is sent to the front-side lower heat exchange portion 5c via the pressure regulator 12. In the refrigerant circuit during the heating operation, the refrigerant passes from the front lower heat exchanger 5c through the decompressor 15, which is an outdoor expansion valve, and the outdoor heat exchanger 16, and flows through the electric four-way valve 14 to the compressor 13, thereby forming a refrigerant circulation circuit. An outdoor fan 17 is provided in the vicinity of the outdoor heat exchanger 16. In the cooling operation, the electric four-way valve 14 is switched to reverse the flow direction of the refrigerant.
[ Structure of abnormality determination detecting mechanism ]
As described above, in the air conditioner of the present embodiment, the pressure regulator 12 is provided between the 1 st heat exchange area X constituted by the back-face side heat exchange portion 5a and the front-face side heat exchange portion 5b and the 2 nd heat exchange area Y constituted by the front-face side heat exchange portion 5 c. With this configuration, the pressure difference can be designed between the refrigerant pressures in the 1 st heat exchange area X and the 2 nd heat exchange area Y.
However, when the operation is switched from the two-temperature mode to the normal mode, and the pressure regulator 12 is found abnormal and cannot operate, the user continues the operation of the air conditioner in a state close to the two-temperature mode although the user looks like the normal mode. Therefore, a device for determining an abnormality of the pressure regulator 12 is required, and when the operation is switched from the two-temperature mode to the normal mode, the temperatures upstream of the refrigerant flow path and downstream of the refrigerant flow path are measured, and whether or not the temperature difference is within a predetermined value is determined.
As a precondition for performing the judgment, for example, the following a to C conditions are necessary. I.e. a. having at least one device for measuring the temperature of the 1 st heat exchange area and the 2 nd heat exchange area, respectively. B. There is a device that can detect that there is a difference in level between the predetermined temperature in the 1 st heat exchange zone and the predetermined temperature in the 2 nd heat exchange zone during the cooling operation and the heating operation. The apparatus shown in c.b has a function of distinguishing cooling, dehumidifying and heating. The abnormality determination device is started when the conditions a to C are satisfied. However, the above-mentioned conditions a to C are not necessarily satisfied, and the operation may be performed by adding necessary conditions not limited to the above-mentioned conditions a to C.
As described above, in the present embodiment, during cooling, and dehumidification, a temperature difference between the temperature detected by the pipe temperature sensor 18b and the temperature detected by the pipe temperature sensor 18a is large, and it is determined that there is an abnormality when the temperature difference is an abnormal temperature difference. In addition, the pipe temperature sensor 18b is subtracted from the pipe temperature sensor 18a during heating, and it is determined that there is an abnormality when there is an abnormal temperature difference for a certain period of time. The abnormality determination device of the air conditioner according to this sample embodiment is configured to be able to cope with both cooling and heating. If the abnormal temperature difference is detected for 1 minute continuously, a stop signal is output, but the certain time may or may not be defined as 1 minute.
[ Structure in abnormality determination detection ]
Fig. 3 is a circuit diagram for stopping the air conditioner when determining an abnormality of the air conditioner according to the present embodiment. When determining whether the pressure regulator is abnormal, a signal for stopping the indoor unit and the compressor for a predetermined time is output.
Fig. 3 is a block diagram of components constituting the abnormality determination device of the air conditioner of the present embodiment.
The abnormality determination device has a control unit 50 provided with: a memory unit 51 for storing an abnormal temperature difference for abnormality determination; a comparison processing calculation unit 52 for comparing the 2 pipe temperature sensors 18a and 18 b; a timer 53 for measuring an abnormality determination time or a compressor stop time; and an operation abnormality number counter 54 for measuring the number of times of abnormality determination. The indoor unit 1 further includes a signal output unit 55 for outputting a signal to stop the compressor 13 or a signal to stop a fan motor (not shown) of the indoor fan 6 of the indoor unit 1. Further, the signals from the pipe temperature sensors 18a and 18b are input to the comparison processing calculation unit 52 via the 1 st numerical processing unit 56 and the 2 nd numerical processing unit 57.
In particular, by stopping the operation of the indoor unit 1 and the compressor 13 of the outdoor unit for a predetermined time and outputting the opening degree signal of the pressure regulator 12, it is possible to reset the error of the pipe temperature sensors 18a and 18b and the opening degree of the pressure regulator 12, and to avoid the risk of erroneous detection. The measurement of the predetermined time may be performed immediately after the stop, or any device may be used as long as the time can be measured.
In the determination of whether or not the pressure regulator 12 of the air conditioner of the present embodiment is abnormal, after stopping the indoor unit 1 and the compressor 13 of the outdoor unit for a predetermined time, the normal mode operation is performed by restarting the indoor unit 1 and the compressor 13 of the outdoor unit. By confirming that there is no temperature difference between the 1 st heat exchange area X and the 2 nd heat exchange area Y, erroneous detection can be avoided. The predetermined time may be measured immediately after the indoor unit 1 and the compressor 13 of the outdoor unit are stopped, and any device may be used as long as the time can be measured, and any device may be used as long as the temperatures of the 1 st heat exchange area X and the 2 nd heat exchange area Y can be measured.
[ order of abnormality judgment detection ]
Fig. 4 is a flowchart showing a procedure of abnormality determination detection of the air conditioner according to the present embodiment. The flowchart is roughly divided into a first retry and retries after a second retry. In the first retry, when all the abnormality determination start conditions are satisfied and the temperature difference between the 1 st heat exchange area X and the 2 nd heat exchange area Y is out of the predetermined temperature range, the cumulative value of the determinations as to whether or not the pressure regulator 12 is abnormal is increased by 1, and then the compressor is stopped (step S101 to step S105). The abnormality determination start condition may be set to a condition excluding the defrosting period and a predetermined period after the defrosting period ends. In the air conditioning operation in which the compressor 13 is operated, the compressor 13 may be operated after the start of the operation, and the maximum opening degree of the pressure regulator 12 may be continuously maintained for t1 minutes or more (10 minutes, for example, t 1), and the compressor 13 may be operated for t2 minutes or more (15 minutes, for example, t 2).
After the compressor 13 is stopped, the opening degree signal is output from the signal output unit 55 to the pressure regulator 12 so as to be driven to the maximum opening degree (step S106). When the opening degree signal is output, "+ 1" is input to the operation abnormality number counter 54 for abnormality determination (step S104).
After the compressor 13 is stopped, it is restarted after a predetermined time (step S107 to step S116). After the compressor 13 is restarted, the fan motor of the indoor unit 1 is also restarted (step S117). Thereafter, the operation abnormality accumulated value is accumulated several times continuously, and abnormality display is performed (step S111 to step S113). If not, the action abnormality cumulative value is cleared and counted from "1" (step S118). In addition, the number of consecutive accumulations is set to 5, but this number is not necessarily used.
The retry after the second retry is the same as the first retry. On the other hand, the abnormal temperature difference is desirably set to be higher than the judgment temperature of the first retry. Further, when restarting the compressor 13, it is desirable to set the pipe temperature higher than the first retry. In addition, as for the judgment temperature, the temperature +5 ℃ at the first retry is the recommended temperature difference, but is not necessarily the same value. Further, the rotation speed of the compressor 13 is also preferably defined in accordance with the determination temperature.
In addition, if the abnormality determination is not performed after a certain time when the compressor 13 is restarted after the retry after the second retry, the operation abnormality number counter 54 is cleared to return to the normal operation. The certain time may be defined as 15 minutes, but is not necessarily the same value.
As described above, according to the air conditioner of the present invention, the load abnormality determination unit can detect whether or not there is an abnormality in the pressure regulator provided on the indoor unit side without disassembling or disassembling the indoor unit.
In the present invention, although the embodiments have been described in some detail, the disclosure of the embodiments may be slightly changed in structure, and the combination and order of the elements of the embodiments may be changed without departing from the scope and spirit of the claims.
As described above, the 1 st aspect of the present invention is an air conditioner including a refrigerant circuit for circulating a refrigerant in a compressor, an indoor-side heat exchanger, a decompressor, and an outdoor-side heat exchanger, and including an indoor unit and an outdoor unit. Further, the indoor unit includes: an indoor heat exchanger having a 1 st heat exchange region and a 2 nd heat exchange region; a pressure regulator disposed between the 1 st heat exchange area and the 2 nd heat exchange area for regulating the pressure of the refrigerant. The indoor unit further includes an indoor fan that exchanges heat in the indoor heat exchanger with air from an inlet port that is open in a part of the casing of the indoor unit, and generates an airflow that is blown out from an outlet port that is formed in another opening of the indoor unit. The indoor unit further includes a partition that partitions the discharge port into a 1 st discharge port on the front surface side and a 2 nd discharge port on the rear surface side with respect to the 1 st discharge port. The indoor unit further includes a rear-side guide portion provided on a rear side of the indoor-side fan and guiding an airflow from the indoor-side fan to the 2 nd outlet; and a front-side guide portion provided on a front side of the indoor-side fan so as to face the rear-side guide portion, the front-side guide portion guiding an airflow from the indoor-side fan to the 1 st air outlet. In the heating operation, the 1 st heat exchange region is set to the 1 st condensation temperature by the pressure reduction of the pressure regulator, and the 2 nd heat exchange region is set to the 2 nd condensation temperature lower than the 1 st condensation temperature. A normal mode in which the pressure regulator is fully opened to perform normal operation; and a two-temperature mode in which the pressure regulator is set to a predetermined throttle amount, wherein in the normal mode, when the temperature difference between the 1 st heat exchange region and the 2 nd heat exchange region does not satisfy a predetermined condition, it is determined that the pressure regulator is abnormal.
With such a configuration, it is possible to reliably determine an abnormality of the pressure regulator and avoid an abnormal operating state in advance.
In the 2 nd invention, in the 1 st invention, the operation signal of the pressure regulator may be output when it is determined that the temperature difference between the 1 st heat exchange area and the 2 nd heat exchange area is outside the predetermined threshold range in the normal mode. Further, the number of operation abnormalities such as clogging and malfunction of the pressure regulator is accumulated, the operation of the indoor unit and the compressor are stopped for a predetermined time, and an opening degree signal for setting the pressure regulator to the maximum opening degree is transmitted.
With this configuration, erroneous detection of abnormality detection can be prevented, and accurate determination can be made.
In the invention of claim 3, in the invention of claim 1, when it is determined that the temperature difference between the heat exchange area 1 and the heat exchange area 2 is out of the threshold range, the operation signal of the pressure regulator is output, the operation of the indoor unit and the compressor are stopped for a predetermined time, the operation of the indoor unit and the compressor are restarted, and the cumulative time measuring unit that accumulates the predetermined time is reset.
With this configuration, erroneous detection of abnormality detection can be prevented, and accurate determination can be made.
In the 4 th aspect of the present invention, in the 2 nd aspect of the present invention, when it is determined that the temperature difference between the 1 st heat exchange area and the 2 nd heat exchange area is out of the threshold range, the operation signal of the pressure regulator is output, the operation of the indoor unit and the compressor are stopped for a predetermined time, the operation of the indoor unit and the compressor are restarted, and the cumulative time measuring unit that accumulates the predetermined time is reset.
With this configuration, erroneous detection of abnormality detection can be prevented, and accurate determination can be made.
In the 5 th aspect of the present invention, in any one of the 1 st to 4 th aspects of the present invention, when the number of times of abnormality determination in the case where the pressure regulator is determined to be abnormal is 2 or more, the compressor may be operated at a higher rotation speed than the first retry when the operation of the indoor unit and the outdoor unit and the restart of the compressor are performed after the compressor is stopped for a predetermined time. Further, the temperature difference between the 1 st heat exchange area and the 2 nd heat exchange area is made larger, and the predetermined condition for determining the abnormality is changed.
With this configuration, erroneous detection of abnormality detection can be prevented, and accurate determination can be made. The predetermined time of stopping may be a time measurement start immediately after stopping, and any device may be used as long as the time can be measured.
Industrial applicability of the invention
The present invention is an air conditioner that can clearly determine an abnormality without causing an error of unknown cause for a person who mounts the air conditioner in a dual temperature mode, and is therefore an air conditioner with high practicability.
Description of the reference numerals
1 indoor machine
2a upper surface opening
2b blow-out port
2c front panel
3 wind direction shutter assembly
4 Filter
5 Heat exchanger
5a rear side heat exchange part
5b front upper heat exchange part
5c front lower heat exchange part
6 indoor side fan
7 ventilating road
8 rear guide piece (Back side guide part)
9 stabilizer (front side guide part)
10 human body sensor
11 thermal sensor
12 pressure regulator
13 compressor
14 electric four-way valve
15 pressure reducer
16 outdoor side heat exchanger
17 outdoor side fan
18a, 18b piping temperature sensor
30 up and down wind direction louver boards
31 upper blade plate
32 middle layer blade plate
33 lower blade plate
40 left and right wind direction louver board
40a upper left and right blades
40b lower left and right blades
50 control part
X1 st heat exchange zone
Y2 nd heat exchange zone.
Claims (5)
1. An air conditioner having a refrigerant circuit for circulating a refrigerant among a compressor, an indoor-side heat exchanger, a decompressor, and an outdoor-side heat exchanger, and comprising an indoor unit and an outdoor unit, characterized in that:
the indoor unit includes:
an indoor heat exchanger having a 1 st heat exchange region and a 2 nd heat exchange region;
a pressure regulator disposed between the 1 st heat exchange area and the 2 nd heat exchange area to regulate a pressure of the refrigerant;
an indoor fan that exchanges heat in the indoor heat exchanger with air from an inlet port that is open at a portion of a casing of the indoor unit, and generates an airflow that is blown out from an outlet port that is formed at another opening of the indoor unit;
a partition that partitions the air outlet into a 1 st air outlet on a front surface side of the indoor unit and a 2 nd air outlet on a rear surface side of the indoor unit with respect to the 1 st air outlet;
a rear-side guide section provided on a rear side of the indoor-side fan and guiding an airflow from the indoor-side fan to the 2 nd outlet; and
a front-side guide portion provided on a front side of the indoor-side fan so as to face the rear-side guide portion, the front-side guide portion guiding an airflow from the indoor-side fan to the 1 st air outlet,
in the heating operation, the 1 st heat exchange region is set to a 1 st condensing temperature by the pressure reduction of the pressure regulator, and the 2 nd heat exchange region is set to a 2 nd condensing temperature lower than the 1 st condensing temperature,
a normal mode in which the pressure regulator is fully opened to perform normal operation; and a dual temperature mode for bringing the pressure regulator to a prescribed throttle amount,
and means for determining that the pressure regulator is abnormal when a temperature difference between the 1 st heat exchange area and the 2 nd heat exchange area does not satisfy a predetermined condition in the normal mode.
2. The air conditioner according to claim 1, characterized in that:
the indoor unit control device includes a device that outputs an operation signal of the pressure regulator when it is determined that a temperature difference between the 1 st heat exchange area and the 2 nd heat exchange area is outside a predetermined threshold range in the normal mode, accumulates the number of operation abnormalities such as clogging or malfunction of the pressure regulator, stops the operation of the indoor unit and the compressor for a predetermined time, and transmits an opening degree signal for setting the pressure regulator to a maximum opening degree.
3. The air conditioner according to claim 1, characterized in that:
the indoor unit control device comprises a device which outputs an operation signal of the pressure regulator when the temperature difference between the 1 st heat exchange area and the 2 nd heat exchange area is judged to be out of a threshold value range, enables the operation of the indoor unit and the compressor to be stopped for a preset time, then enables the operation of the indoor unit and the compressor to be restarted, and resets a cumulative time measuring part for accumulating the preset time.
4. The air conditioner according to claim 2, characterized in that:
the indoor unit control device comprises a device which outputs an operation signal of the pressure regulator when the temperature difference between the 1 st heat exchange area and the 2 nd heat exchange area is judged to be out of a threshold value range, enables the operation of the indoor unit and the compressor to be stopped for a preset time, then enables the operation of the indoor unit and the compressor to be restarted, and resets a cumulative time measuring part for accumulating the preset time.
5. The air conditioner according to any one of claims 1 to 4, wherein:
the apparatus includes a device for, when the number of abnormality determinations is 2 or more when it is determined that the pressure regulator is abnormal, operating the indoor unit and the outdoor unit and stopping the compressor for a predetermined time and then restarting the compressor, operating the compressor at a higher rotation speed than that at the time of the first retry, increasing the temperature difference between the 1 st heat exchange area and the 2 nd heat exchange area, and changing a predetermined condition for abnormality determination.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-086771 | 2017-04-26 | ||
| JP2017086771 | 2017-04-26 | ||
| PCT/JP2018/014186 WO2018198688A1 (en) | 2017-04-26 | 2018-04-03 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110226070A CN110226070A (en) | 2019-09-10 |
| CN110226070B true CN110226070B (en) | 2020-12-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880008910.0A Active CN110226070B (en) | 2017-04-26 | 2018-04-03 | Air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110226070B (en) |
| WO (1) | WO2018198688A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579674B (en) * | 2019-10-14 | 2021-05-04 | 珠海格力电器股份有限公司 | Fault detection circuit with simplified structure, fault judgment method and equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147818A (en) * | 2000-11-14 | 2002-05-22 | Sharp Corp | Air conditioner and failure in operation deciding method |
| JP2009097834A (en) * | 2007-10-19 | 2009-05-07 | Daikin Ind Ltd | Air conditioner |
| JP2011089662A (en) * | 2009-10-20 | 2011-05-06 | Mitsubishi Electric Corp | Air conditioner |
| JP2013076550A (en) * | 2011-09-14 | 2013-04-25 | Panasonic Corp | Air conditioner |
| CN103314261A (en) * | 2011-01-17 | 2013-09-18 | 大金工业株式会社 | Air conditioner |
| CN105783203A (en) * | 2016-04-28 | 2016-07-20 | 广东美的暖通设备有限公司 | Air conditioner and abnormal detection method for indoor unit of air conditioner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002071188A (en) * | 2000-08-30 | 2002-03-08 | Mitsubishi Electric Building Techno Service Co Ltd | Abnormal heating medium supply detection apparatus |
| JP2011149622A (en) * | 2010-01-21 | 2011-08-04 | Fujitsu General Ltd | Air conditioner |
| JP6371046B2 (en) * | 2013-09-03 | 2018-08-08 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner and heat exchanger for air conditioner |
-
2018
- 2018-04-03 CN CN201880008910.0A patent/CN110226070B/en active Active
- 2018-04-03 WO PCT/JP2018/014186 patent/WO2018198688A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002147818A (en) * | 2000-11-14 | 2002-05-22 | Sharp Corp | Air conditioner and failure in operation deciding method |
| JP2009097834A (en) * | 2007-10-19 | 2009-05-07 | Daikin Ind Ltd | Air conditioner |
| JP2011089662A (en) * | 2009-10-20 | 2011-05-06 | Mitsubishi Electric Corp | Air conditioner |
| CN103314261A (en) * | 2011-01-17 | 2013-09-18 | 大金工业株式会社 | Air conditioner |
| JP2013076550A (en) * | 2011-09-14 | 2013-04-25 | Panasonic Corp | Air conditioner |
| CN105783203A (en) * | 2016-04-28 | 2016-07-20 | 广东美的暖通设备有限公司 | Air conditioner and abnormal detection method for indoor unit of air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110226070A (en) | 2019-09-10 |
| WO2018198688A1 (en) | 2018-11-01 |
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