WO2018073904A1 - Indoor unit of air conditioner and air conditioner - Google Patents

Indoor unit of air conditioner and air conditioner Download PDF

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Publication number
WO2018073904A1
WO2018073904A1 PCT/JP2016/080907 JP2016080907W WO2018073904A1 WO 2018073904 A1 WO2018073904 A1 WO 2018073904A1 JP 2016080907 W JP2016080907 W JP 2016080907W WO 2018073904 A1 WO2018073904 A1 WO 2018073904A1
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WO
WIPO (PCT)
Prior art keywords
temperature
rotational speed
air volume
blower
heat exchanger
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Application number
PCT/JP2016/080907
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French (fr)
Japanese (ja)
Inventor
将一 青木
Original Assignee
三菱電機株式会社
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Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/080907 priority Critical patent/WO2018073904A1/en
Priority to JP2018546080A priority patent/JP6656400B2/en
Publication of WO2018073904A1 publication Critical patent/WO2018073904A1/en

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • 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

Definitions

  • the present invention relates to an indoor unit of an air conditioner and an air conditioner.
  • Patent Document 1 an air conditioner that controls the rotation speed of a compressor and the rotation speed of an indoor blower based on the indoor temperature has been proposed (see, for example, Patent Document 1).
  • the air conditioner described in Patent Literature 1 reduces the rotation speed of the compressor and the rotation speed of the indoor fan.
  • the heating operation When the heating operation is executed, if the condensation temperature of the heat exchanger mounted on the indoor unit is high, high-temperature air is supplied from the indoor unit to the room accordingly. In such a situation, the room temperature may exceed the target temperature, the room may be heated more than necessary, and the energy saving performance of the air conditioner may be reduced.
  • the present invention has been made to solve the above-described problems, and an object thereof is to provide an air conditioner indoor unit and an air conditioner that can improve energy saving.
  • An indoor unit of an air conditioner detects a first heat exchanger that functions as a condenser, a blower that supplies air to the first heat exchanger, and a condensation temperature of the first heat exchanger.
  • the control device has a temperature at which the condensing temperature is determined in advance during the heating operation. When it becomes above, it is configured to reduce the current set rotational speed of the blower to a corrected rotational speed that is determined according to the size of the condensation temperature and is smaller than the current set rotational speed. .
  • FIG. 1 is an explanatory diagram of the refrigerant circuit C of the air-conditioning apparatus 100 according to the present embodiment.
  • the air conditioning apparatus 100 includes a refrigerant circuit C that circulates the refrigerant.
  • the air conditioner 100 includes an outdoor unit 101 and an indoor unit 102.
  • the air conditioner 100 is a so-called separate type air conditioner in which an outdoor unit 101 and an indoor unit 102 are separated.
  • the outdoor unit 101 and the indoor unit 102 are connected via a refrigerant pipe P1 and a refrigerant pipe P2.
  • the outdoor unit 101 is provided with a valve Va to which the refrigerant pipe P1 and the refrigerant pipe P2 are connected.
  • the indoor unit 102 is also provided with a valve Va to which the refrigerant pipe P1 and the refrigerant pipe P2 are connected.
  • the refrigerant circuit C includes a compressor 1, a four-way valve 2, a throttle device 4, a first heat exchanger 5, a second heat exchanger 3, a refrigerant pipe P1, and a refrigerant pipe P2.
  • the air conditioner 100 includes a second blower 3A attached to the second heat exchanger 3 and a first blower 5A attached to the first heat exchanger 5.
  • a compressor 1, a four-way valve 2, a second heat exchanger 3, a second blower 3A, and a throttle device 4 are mounted in the indoor unit 102.
  • the first heat exchanger 5 and the first blower 5A are mounted in the indoor unit 102.
  • the air conditioner 100 includes a control device 50 that performs overall control of the outdoor unit 101 and the indoor unit 102.
  • the control device 50 is mounted on the indoor unit 102, but is not limited thereto.
  • the air conditioning apparatus 100 may be configured such that control devices are mounted on the outdoor unit 101 and the indoor unit 102, and these control devices communicate with each other.
  • the air conditioner 100 includes an input device RC that gives a control command to the indoor unit 102.
  • the input device RC functions as a remote controller.
  • the air conditioning apparatus 100 includes a condensation temperature detection unit D1 that detects the condensation temperature of the refrigerant circuit C, and an indoor temperature detection unit D2 that detects the room temperature.
  • Compressor 1 is a fluid machine that compresses sucked low-pressure refrigerant and discharges it as high-pressure refrigerant.
  • the rotation speed of the compressor 1 is controlled by an inverter, for example.
  • the compressor 1 includes a refrigerant discharge portion that discharges high-pressure refrigerant and a refrigerant suction portion that sucks low-pressure refrigerant that circulates and returns through the refrigerant circuit C.
  • the four-way valve 2 communicates the refrigerant discharge part of the compressor 1 and the second heat exchanger 3, and communicates the refrigerant suction part of the compressor 1 and the first heat exchanger 5.
  • a second flow path that communicates the passage, the refrigerant discharge portion of the compressor 1 and the first heat exchanger 5, and communicates the refrigerant suction portion of the compressor 1 and the second heat exchanger 3. including.
  • the four-way valve 2 is selectively switched between the first flow path and the second flow path by the control device 50. During the cooling operation, the four-way valve 2 is switched to the first flow path, and during the heating operation, the four-way valve 2 is switched to the second flow path.
  • the throttle device 4 is, for example, an electronic expansion valve whose opening degree can be adjusted.
  • the expansion device 4 can also use other decompression means such as a capillary tube.
  • the first heat exchanger 5 can be configured, for example, as an air-cooled heat exchanger that performs heat exchange between the refrigerant circulating inside and the air blown by the first blower 5A.
  • the first heat exchanger 5 can be configured as a fin-and-tube heat exchanger.
  • the first heat exchanger 5 functions as an evaporator when the air-conditioning apparatus 100 is performing a cooling operation, and functions as a condenser when a heating operation is being performed.
  • the first blower 5A includes an electric motor (not shown) and a fan that is rotated by the electric motor.
  • the rotation speed of the first blower 5 ⁇ / b> A is controlled so that the amount of air supplied to the first heat exchanger 5 can be variably adjusted.
  • the rotational speed of the first blower 5A is the rotational speed of the fan of the first blower 5A. In the present embodiment, there are at least seven rotation speeds (air volumes) that can be set in the first blower 5A (see FIG. 2B).
  • the second heat exchanger 3 can be configured as, for example, an air-cooled heat exchanger that performs heat exchange between the refrigerant circulating inside and the air blown by the second blower 3A.
  • the air-cooling heat source side heat exchanger can be configured as, for example, a cross-fin type fin-and-tube heat exchanger including a heat transfer tube and a plurality of fins.
  • the second heat exchanger 3 functions as a condenser (heat radiator) when the air-conditioning apparatus 100 is performing the cooling operation, and functions as an evaporator when the heating operation is being performed.
  • the control device 50 comprehensively controls the compressor 1, the expansion device 4, the second blower 3A, the first blower 5A, and the like.
  • the control device 50 acquires the condensation temperature data transmitted from the condensation temperature detection unit D1 and the room temperature data transmitted from the room temperature detection unit D2.
  • Each functional unit included in the control device 50 is configured by dedicated hardware or MPU (Micro Processing Unit) that executes a program stored in a memory.
  • MPU Micro Processing Unit
  • the control device 50 may be, for example, a single circuit, a composite circuit, an ASIC (application specific integrated circuit), an FPGA (field-programmable gate array), or a combination thereof. Applicable.
  • Each functional unit realized by the control device 50 may be realized by individual hardware, or each functional unit may be realized by one piece of hardware.
  • each function executed by the control device 50 is realized by software, firmware, or a combination of software and firmware.
  • Software and firmware are described as programs and stored in a memory.
  • the MPU implements each function of the control device 50 by reading and executing a program stored in the memory.
  • the memory is a nonvolatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM.
  • the input device RC can transmit to the indoor unit 102 a control command for heating operation and cooling operation, a control command for the air volume blown from the indoor unit 102, and a control command for the indoor set temperature. It is configured.
  • the input device RC may be connected to the indoor unit 102 by wire or may be connected wirelessly.
  • the input device RC can also be configured by a mobile terminal (for example, a mobile phone) provided with a predetermined application.
  • the input device RC includes an air volume setting unit RC1 that receives a set air volume, an indoor temperature setting unit RC2 that receives an indoor set temperature, and an operation mode setting unit RC3 that receives various operation modes. In the operation mode, there is a heating operation, and there may be a cooling operation.
  • the air volume setting unit RC1, the room temperature setting unit RC2, and the operation mode setting unit RC3 can be configured with buttons operated by the user, for example.
  • the air volume setting unit RC1 is configured to receive a plurality of air volumes.
  • the control device 50 has a large air volume (Hi) that is the first set air volume, a medium air volume 2 (Mid2) that is the second set air volume, and a medium air volume that is the third set air volume. It is possible to set four levels of air volume, 1 (Mid1) and a small air volume (Lo) that is the fourth set air volume.
  • the air volume decreases in the order of large air volume, 2 medium air volumes, 1 medium air volume, and small air volumes.
  • the set air volume is not limited to four stages, but may be one to three stages or five stages or more.
  • the condensation temperature detector D1 includes a first condensation temperature sensor SE1 and a second condensation temperature sensor SE3.
  • the first condensation temperature sensor SE1 and the second condensation temperature sensor SE3 can be composed of a thermistor or the like.
  • the first condensing temperature sensor SE ⁇ b> 1 is provided in the first heat exchanger 5 mounted on the indoor unit 102.
  • the first condensing temperature sensor SE1 detects the condensing temperature of the refrigerant during the heating operation in which the first heat exchanger 5 functions as a radiator.
  • the second condensing temperature sensor SE3 is provided in the second heat exchanger 3 mounted on the outdoor unit 101.
  • the second condensing temperature sensor SE3 detects the condensing temperature of the refrigerant during the cooling operation in which the second heat exchanger 3 functions as a radiator.
  • the condensation temperature detected by the first condensation temperature sensor SE1 and the condensation temperature detected by the second condensation temperature sensor SE3 are transmitted from the condensation temperature detection unit D1 to the control device 50 as condensation temperature data.
  • the room temperature detection unit D2 includes a room temperature sensor SE2 that detects the room temperature.
  • the indoor temperature detection unit D2 is provided in the indoor unit 102.
  • the indoor temperature sensor SE2 detects the temperature (indoor temperature) of the air taken into the indoor unit 102 by the action of the first blower 5A.
  • the indoor temperature sensor SE2 can be composed of a thermistor or the like.
  • the room temperature detected by the room temperature sensor SE2 is transmitted from the room temperature detection unit D2 to the control device 50 as room temperature data.
  • the refrigerant compressed by the compressor 1 becomes a high-temperature and high-pressure refrigerant and is supplied to the second heat exchanger 3 through the four-way valve 2.
  • the refrigerant supplied to the second heat exchanger 3 exchanges heat with air, dissipates heat, condenses, becomes a high-pressure liquid refrigerant, and is supplied to the expansion device 4.
  • the refrigerant supplied to the expansion device 4 is reduced in pressure to become a low-temperature and low-pressure two-phase refrigerant, passes through the refrigerant pipe P2, and is supplied to the first heat exchanger 5 of the indoor unit 102.
  • the refrigerant supplied to the first heat exchanger 5 exchanges heat with indoor air to absorb heat, evaporates and becomes a low-temperature gas refrigerant. At this time, the indoor air is cooled by the refrigerant. And the cooled air is supplied indoors from the blower outlet of the indoor unit 102 by the effect
  • the refrigerant that has passed through the first heat exchanger 5 returns to the outdoor unit 101 through the refrigerant pipe P1, and returns to the compressor 1 through the four-way valve 2.
  • the refrigerant compressed by the compressor 1 becomes a high-temperature and high-pressure refrigerant and is supplied to the first heat exchanger 5 of the indoor unit 102 through the four-way valve 2 and the refrigerant pipe P1.
  • coolant supplied to the 1st heat exchanger 5 heat-exchanges with air, dissipates heat, condenses, and turns into a high voltage
  • indoor air is heated.
  • the heated air is supplied into the room from the outlet of the indoor unit 102 by the action of the first blower 5A.
  • the refrigerant that has passed through the first heat exchanger 5 returns to the outdoor unit 101 through the refrigerant pipe P ⁇ b> 2 and is supplied to the expansion device 4.
  • the refrigerant supplied to the expansion device 4 is depressurized to become a low-temperature and low-pressure two-phase refrigerant and supplied to the second heat exchanger 3.
  • the refrigerant supplied to the second heat exchanger 3 exchanges heat with air to absorb heat, evaporates and becomes a low-temperature gas refrigerant. Then, the refrigerant that has passed through the second heat exchanger 3 is returned to the compressor 1 through the four-way valve 2.
  • FIG. 2A is a functional block diagram of control device 50 of air-conditioning apparatus 100 according to the present embodiment.
  • FIG. 2B is an explanatory diagram of a table used when correcting the rotation speed currently set in the first blower 5A.
  • the numbers 1 to 7 shown in FIG. 2B indicate the magnitude relationship of the rotational speed of the first blower 5A.
  • the control device 50 includes a determination unit 50A (determination of various temperature arrivals), a rotation speed correction unit 50B, a target temperature calculation unit 50C, an output control device 50D, and a storage unit 50E.
  • determination unit 50A determination of various temperature arrivals
  • rotation speed correction unit 50B correction of various temperature arrivals
  • target temperature calculation unit 50C calculation of various temperature arrivals
  • output control device 50D output control device
  • storage unit 50E storage unit 50E.
  • the control apparatus 50 is provided with the timer, and has the function to measure time.
  • the determination unit 50A determines whether or not the room has reached the target temperature based on the room temperature data transmitted from the room temperature detection unit D2. Further, the determination unit 50A determines whether or not to correct the rotation speed of the first blower 5A based on the condensation temperature data transmitted from the condensation temperature detection unit D1. The determination unit 50A determines that correction is performed when the condensation temperature specified by the condensation temperature data is equal to or higher than a predetermined temperature, and determines that correction is not performed when the temperature is lower than the predetermined temperature.
  • Rotation speed correction unit 50B When the determination unit 50A determines that the rotation number of the first blower 5A is to be corrected, the rotation number correction unit 50B calculates a correction value (corrected rotation number) of the rotation number of the first blower 5A. The rotation speed correction unit 50B calculates the corrected rotation speed in accordance with the magnitude of the condensation temperature specified by the condensation temperature data.
  • the rotation speed correction unit 50B calculates the corrected rotation speed using the corrected rotation speed calculation table stored in the storage unit 50E.
  • a predetermined arithmetic expression is stored in the storage unit 50E, and correction is performed based on the arithmetic expression, the condensation temperature, and the set air volume.
  • the post-rotation speed may be calculated.
  • the rotation speed correction unit 50B is configured to reduce the corrected rotation speed according to the size of the condensation temperature. For example, when the current set air volume is a small air volume (Lo), the rotation speed after correction is as follows. Here, the rotational speed corresponding to the small air volume (Lo) is 4. (1) When the condensation temperature is lower than the first temperature T1, the rotation speed correction unit 50B determines that the set rotation speed of the first blower 5A remains the current set rotation speed. (2) When the condensation temperature is equal to or higher than the first temperature T1 and lower than the second temperature T2, the rotation speed correction unit 50B sets the set rotation speed of the first blower 5A to a size 4. A decision is made to change from the currently set rotational speed to a corrected rotational speed (first rotational speed) of size 3.
  • the rotation speed correction unit 50B sets the set rotation speed of the first blower 5A to a size 4. It is determined that the current set rotational speed is changed to a post-correction rotational speed (second rotational speed) having a magnitude of 2.
  • the rotation speed correction unit 50B increases the setting rotation speed of the first blower 5A from the current setting rotation speed of size 4. It is determined to change to a post-correction rotational speed (third rotational speed) that is 1.
  • size is small in order of the present setting rotation speed, 1st rotation speed, 2nd rotation speed, and 3rd rotation speed.
  • the rotational speed is not corrected as in the above (1), but the condensation temperature is the predetermined temperature (first temperature T1).
  • the rotational speed is corrected as in (2) to (4) above, and the set rotational speed of the first blower 5A is reduced.
  • the post-correction rotational speed can be changed in three stages (first rotational speed, second rotational speed, and third rotational speed). However, it may be two stages or four stages or more.
  • the rotation speed correction unit 50B is configured to reduce the corrected rotation speed in accordance with the set air volume of the first blower 5A set by the input device RC.
  • the current set air volume is a large air volume (Hi) that is the first set air volume
  • the first rotational speed of the first blower 5A is 6 and the current set air volume is the second.
  • the air flow rate is 2 (Mid2)
  • the first rotational speed of the first blower 5A is 5 and the current air flow rate is 1 (3).
  • the first rotational speed of the first blower 5A is 4 and the current set air volume is the fourth set air volume, which is the low air volume (Lo).
  • the first rotational speed of the blower 5 ⁇ / b> A is 3.
  • the 1st number of rotations becomes small, so that the setting air volume of 5 A of 1st fans set by input device RC becomes small.
  • the second rotation speed and the third rotation speed also decrease as the set air volume decreases.
  • the corrected rotational speed includes a rotational speed lower than the rotational speed corresponding to the minimum air volume among the plurality of set air volumes. That is, the control device 50 can operate the first blower 5A with an air volume smaller than the fourth set air volume that is the minimum as the set air volume that can be set by the input device RC.
  • the control device 50 and the first blower 5A are configured to be able to be operated at a rotational speed smaller than the rotational speed corresponding to the fourth set air volume that is the minimum as the set air volume. .
  • the rotation speed described here corresponds to the rotation speeds of magnitude 1 to magnitude 3 in FIG. 2B.
  • the target temperature calculation unit 50C calculates the indoor target temperature based on the indoor set temperature data transmitted from the input device RC.
  • the target temperature is usually a temperature equivalent to a set temperature set by the input device RC.
  • the target temperature is a value deviated from the set temperature set by the input device RC.
  • the target temperature calculation unit 50C calculates a temperature higher than the set temperature as the target temperature.
  • the control device 50 increases the rotational speed of the compressor 1.
  • the output control device 50D controls various devices based on the determination result of the determination unit 50A, the calculation result of the rotation speed correction unit 50B, the data stored in the storage unit 50E, and the like.
  • the output control device 50D controls at least one of the compressor 1, the expansion device 4, the second blower 3A, and the first blower 5A.
  • Storage unit 50E Various data are stored in the storage unit 50E.
  • the storage unit 50E stores various data such as condensation temperature data and room temperature data.
  • the storage unit 50E stores a corrected rotation speed calculation table.
  • the control device 50 uses an arithmetic expression for calculating the corrected rotational speed instead of the corrected rotational speed calculation table, the arithmetic expression is stored in the storage unit 50E.
  • FIG. 3 is an explanatory diagram of a control flow of the air-conditioning apparatus 100 according to the present embodiment. With reference to FIG. 3, an example of the control flow of the air conditioning apparatus 100 will be described. In this control flow, the heating operation is assumed.
  • the target temperature calculation unit 50C calculates a target temperature based on data (for example, indoor set temperature data) transmitted from the input device RC (step S1).
  • the control device 50 acquires the room temperature.
  • the room temperature is specified by room temperature data transmitted from the room temperature detection unit D2.
  • the determination unit 50A compares the target temperature with the room temperature (step S3). When the absolute value of the value obtained by subtracting the room temperature from the target temperature is equal to or greater than a predetermined value, the control device 50 proceeds from step S3 to step S4-1. When the absolute value is less than the predetermined value, The control device 50 proceeds from step S3 to step S4-2.
  • the output control device 50D compresses the target temperature and the room temperature because there is an opening.
  • the rotational speed of the machine 1 is maintained or increased (step S4-1).
  • the output control device 50D determines that the absolute value of the value obtained by subtracting the room temperature from the target temperature is less than a predetermined value, the target temperature and the room temperature do not open or are small.
  • the rotational speed of the compressor 1 is reduced (step S4-2).
  • the control device 50 acquires the condensation temperature of the first heat exchanger 5.
  • the condensation temperature is specified by the condensation temperature data transmitted from the condensation temperature detection unit D1.
  • the determination unit 50A determines whether or not to correct the current set rotational speed of the first blower 5A based on the condensation temperature of the second heat exchanger (step S6).
  • step S7 If it is determined that the current set rotational speed of the first blower 5A is to be corrected, the control device 50 proceeds to step S7, and if it is determined not to correct the current set rotational speed of the first blower 5A, the control device 50 performs a step. Return to S1.
  • the rotation speed correction unit 50B calculates the corrected rotation speed based on the condensation temperature of the first heat exchanger 5 and the set air volume of the first blower 5A (step S7).
  • the output control device 50D operates the first blower 5A at the corrected rotational speed (step S8).
  • FIG. 4 is an explanatory diagram of the time change of the room temperature and the time change of the rotational speed of the blower.
  • FIG. 4A shows the transition of the indoor temperature in the conventional control and the transition of the indoor temperature in the present embodiment.
  • FIG.4 (b) has shown transition of the rotation speed of the 2nd air blower of conventional control.
  • FIG.4 (c) has shown transition of the rotation speed of 5 A of 1st air blowers of this Embodiment.
  • the room temperature exceeds the set temperature of the input device RC without decreasing the rotational speed of the second blower according to the increase in the condensation temperature. That is, in the conventional control, extra air heated in the room is supplied, and the energy saving performance is reduced accordingly.
  • the rotation speed of a 2nd air blower is dropped according to the rise in condensation temperature, it approaches so that indoor temperature may not exceed the preset temperature of input device RC, and energy-saving property improves. Yes.
  • the indoor unit 102 of the air conditioner 100 has the current setting of the first blower 5A when the condensing temperature is equal to or higher than a predetermined temperature during the heating operation.
  • the rotational speed is reduced to a corrected rotational speed that is smaller than the currently set rotational speed.
  • the post-correction rotational speed is determined according to the magnitude of the condensation temperature. The higher the condensing temperature, the smaller the corrected rotation speed. For this reason, the indoor unit 102 can suppress the power consumption of the first blower 5 ⁇ / b> A as much as it is not necessary to supply extra air heated indoors, and can improve energy saving.
  • FIG. 5 is a modification of the control flowchart shown in FIG.
  • Steps S1 to S8 in FIG. 5 are the same as steps S1 to S8 in FIG.
  • step S9 of FIG. 5 step S9 for increasing the opening degree of the expansion device 4 is added after step S8.
  • control device 50 is configured to increase the opening degree of the expansion device 4 when the current set rotational speed is reduced to the corrected rotational speed. Thereby, it is possible to prevent the condensation temperature of the first heat exchanger 5 from rising too much. That is, when the rotation speed of the first blower 5A is decreased to the corrected rotation speed, the flow rate of the air supplied to the first heat exchanger 5 may decrease and the condensation temperature may increase. . Then, when the rotation speed of the first blower 5A is reduced to the corrected rotation speed, the condensing temperature increases, and further, the rotation speed of the first blower 5A may be decreased to the corrected rotation speed. . In order to avoid such a situation, in the present modification, when the current set rotational speed is reduced to the post-correction rotational speed, the opening degree of the expansion device 4 is increased.
  • the control device 50 increases the opening degree of the expansion device 4 at the timing to reduce the current set rotational speed to the corrected rotational speed. Thereby, the situation as described above can be avoided more reliably.
  • the timing at which the current set rotational speed is reduced to the corrected rotational speed will be described.
  • the opening degree of the expansion device 4 may be increased at the same time as the current set rotational speed is reduced to the corrected rotational speed.
  • it is not limited simultaneously, and the opening degree of the expansion device 4 may be increased immediately after the current set rotational speed is reduced to the corrected rotational speed. Further, the opening degree of the expansion device 4 may be increased immediately before the current set rotational speed is reduced to the corrected rotational speed.
  • FIG. 6 is a modification of the refrigerant circuit shown in FIG.
  • differences from this embodiment will be mainly described, and the same reference numerals are given to common configurations.
  • the configuration of the refrigerant circuit is not limited to the mode shown in FIG. 1, but may be the mode shown in FIG.
  • An air conditioner 500 according to the modification shown in FIG. 6 is assumed to be a multi air conditioner for buildings, for example.
  • the air conditioner 500 includes an outdoor unit 501 and an indoor unit 502.
  • the air conditioner 500 is provided with a plurality of indoor units 502.
  • the outdoor unit 501 is not provided with the expansion device 4.
  • each indoor unit 502 is provided with a throttle device 4.
  • the expansion device 4 may be provided in each indoor unit 502, and the expansion device may also be provided in the outdoor unit 101.
  • an outdoor unit 501 and a plurality of indoor units 502 are connected via a refrigerant pipe P1 and a refrigerant pipe P2.
  • a refrigerant pipe P1 and a refrigerant pipe P2 are connected via a refrigerant pipe P1 and a refrigerant pipe P2.

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Abstract

This invention is provided with a first heat exchanger functioning as a condenser, a blower for feeding air to the first heat exchanger, a condensation temperature sensor for detecting the condensation temperature of the first heat exchanger, and a control device for controlling the blower on the basis of the condensation temperature detected by the condensation temperature sensor. The control device is configured to lower the current set rotation speed of the blower to a corrected rotation speed, which is determined in accordance with the condensation temperature and which is lower than the current set rotation speed, if the condensation temperature reaches a predetermined temperature or higher while a heating operation is being performed.

Description

空気調和装置の室内機及び空気調和装置Air conditioner indoor unit and air conditioner
　本発明は、空気調和装置の室内機及び空気調和装置に関するものである。 The present invention relates to an indoor unit of an air conditioner and an air conditioner.
　従来から、室内温度に基づいて、圧縮機の回転数及び室内送風機の回転数を制御する空気調和装置が提案されている（例えば、特許文献１参照）。特許文献１に記載の空気調和装置は、室内温度が目標温度に到達すると、圧縮機の回転数及び室内送風機の回転数を低下させる。 Conventionally, an air conditioner that controls the rotation speed of a compressor and the rotation speed of an indoor blower based on the indoor temperature has been proposed (see, for example, Patent Document 1). When the room temperature reaches the target temperature, the air conditioner described in Patent Literature 1 reduces the rotation speed of the compressor and the rotation speed of the indoor fan.
特開昭６０－１０８６３８号公報JP 60-108638 A
　暖房運転を実行しているときにおいて、室内機に搭載された熱交換器の凝縮温度が高いと、その分室内機から室内へ高温の空気が供給されることとなる。このような状況では、室内温度が目標温度を超え、必要以上に室内が暖まってしまい、空気調和装置の省エネルギー性が低下する場合がある。 When the heating operation is executed, if the condensation temperature of the heat exchanger mounted on the indoor unit is high, high-temperature air is supplied from the indoor unit to the room accordingly. In such a situation, the room temperature may exceed the target temperature, the room may be heated more than necessary, and the energy saving performance of the air conditioner may be reduced.
　本発明は、上述のような課題を解決するためになされたものであり、省エネルギー性を向上させることができる空気調和装置の室内機及び空気調和装置を提供することを目的とする。 The present invention has been made to solve the above-described problems, and an object thereof is to provide an air conditioner indoor unit and an air conditioner that can improve energy saving.
　本発明に係る空気調和装置の室内機は、凝縮器として機能する第１の熱交換器と、第１の熱交換器に空気を供給する送風機と、第１の熱交換器の凝縮温度を検出する凝縮温度センサーと、凝縮温度センサーによって検出された凝縮温度に基づいて送風機を制御する制御装置と、を備え、制御装置は、暖房運転を実行しているときに凝縮温度が予め定められた温度以上となった場合には、送風機の現在の設定回転数を、凝縮温度の大きさに応じて定められ、現在の設定回転数よりも小さい補正後回転数へ、低下させるように構成されている。 An indoor unit of an air conditioner according to the present invention detects a first heat exchanger that functions as a condenser, a blower that supplies air to the first heat exchanger, and a condensation temperature of the first heat exchanger. A condensing temperature sensor, and a control device that controls the blower based on the condensing temperature detected by the condensing temperature sensor. The control device has a temperature at which the condensing temperature is determined in advance during the heating operation. When it becomes above, it is configured to reduce the current set rotational speed of the blower to a corrected rotational speed that is determined according to the size of the condensation temperature and is smaller than the current set rotational speed. .
　本発明によれば、上記構成を備えているので、省エネルギー性を向上させることができる。 According to the present invention, since the above configuration is provided, energy saving can be improved.
本実施の形態に係る室内機を備えた空気調和装置の冷媒回路の説明図である。It is explanatory drawing of the refrigerant circuit of the air conditioning apparatus provided with the indoor unit which concerns on this Embodiment. 本実施の形態に係る室内機を備えた空気調和装置の制御装置の機能ブロック図である。It is a functional block diagram of the control apparatus of the air conditioning apparatus provided with the indoor unit which concerns on this Embodiment. 第１の送風機に現在設定されている回転数を補正するときに用いるテーブルの説明図である。It is explanatory drawing of the table used when correcting the rotation speed currently set to the 1st air blower. 本実施の形態に係る室内機を備えた空気調和装置の制御フローの説明図である。It is explanatory drawing of the control flow of the air conditioning apparatus provided with the indoor unit which concerns on this Embodiment. 室内温度の時間変化及び送風機の回転数の時間変化の説明図である。It is explanatory drawing of the time change of room temperature, and the time change of the rotation speed of an air blower. 図３に示す制御フローチャートの変形例である。It is a modification of the control flowchart shown in FIG. 図１に示す冷媒回路の変形例である。It is a modification of the refrigerant circuit shown in FIG.
実施の形態．
　本実施の形態に係る空気調和装置１００について説明する。
　図１は、本実施の形態に係る空気調和装置１００の冷媒回路Ｃの説明図である。 Embodiment.
The air conditioner 100 according to the present embodiment will be described.
FIG. 1 is an explanatory diagram of the refrigerant circuit C of the air-conditioning apparatus 100 according to the present embodiment.
［構成説明］
　図１に示すように、空気調和装置１００は、冷媒を循環させる冷媒回路Ｃを含む。
　また、空気調和装置１００は、室外機１０１と、室内機１０２とを含む。空気調和装置１００は、室外機１０１と室内機１０２とが分離している、いわゆるセパレート型の空気調和装置である。なお、室外機１０１と室内機１０２とは、冷媒配管Ｐ１及び冷媒配管Ｐ２を介して接続されている。また、室外機１０１には、冷媒配管Ｐ１及び冷媒配管Ｐ２が接続されるバルブＶａが設けられている。室内機１０２にも、冷媒配管Ｐ１及び冷媒配管Ｐ２が接続されるバルブＶａが設けられている。 [Description of configuration]
As shown in FIG. 1, the air conditioning apparatus 100 includes a refrigerant circuit C that circulates the refrigerant.
The air conditioner 100 includes an outdoor unit 101 and an indoor unit 102. The air conditioner 100 is a so-called separate type air conditioner in which an outdoor unit 101 and an indoor unit 102 are separated. The outdoor unit 101 and the indoor unit 102 are connected via a refrigerant pipe P1 and a refrigerant pipe P2. In addition, the outdoor unit 101 is provided with a valve Va to which the refrigerant pipe P1 and the refrigerant pipe P2 are connected. The indoor unit 102 is also provided with a valve Va to which the refrigerant pipe P1 and the refrigerant pipe P2 are connected.
　冷媒回路Ｃは、圧縮機１、四方弁２、絞り装置４、第１の熱交換器５、第２の熱交換器３、冷媒配管Ｐ１及び冷媒配管Ｐ２を含む。また、空気調和装置１００は、第２の熱交換器３に付設される第２の送風機３Ａと、第１の熱交換器５に付設される第１の送風機５Ａとを含む。
　室外機１０１には、圧縮機１、四方弁２、第２の熱交換器３、第２の送風機３Ａ及び絞り装置４が搭載されている。室内機１０２には、第１の熱交換器５及び第１の送風機５Ａが搭載されている。 The refrigerant circuit C includes a compressor 1, a four-way valve 2, a throttle device 4, a first heat exchanger 5, a second heat exchanger 3, a refrigerant pipe P1, and a refrigerant pipe P2. The air conditioner 100 includes a second blower 3A attached to the second heat exchanger 3 and a first blower 5A attached to the first heat exchanger 5.
In the outdoor unit 101, a compressor 1, a four-way valve 2, a second heat exchanger 3, a second blower 3A, and a throttle device 4 are mounted. In the indoor unit 102, the first heat exchanger 5 and the first blower 5A are mounted.
　空気調和装置１００は、室外機１０１及び室内機１０２を統括制御する制御装置５０を備えている。なお、図１では、制御装置５０が室内機１０２に搭載されているが、それに限定されるものではない。空気調和装置１００は、制御装置が室外機１０１及び室内機１０２にそれぞれ搭載され、これらの制御装置が通信する態様であってもよい。 The air conditioner 100 includes a control device 50 that performs overall control of the outdoor unit 101 and the indoor unit 102. In FIG. 1, the control device 50 is mounted on the indoor unit 102, but is not limited thereto. The air conditioning apparatus 100 may be configured such that control devices are mounted on the outdoor unit 101 and the indoor unit 102, and these control devices communicate with each other.
　空気調和装置１００は、室内機１０２に制御指令をする入力装置ＲＣを備えている。入力装置ＲＣは、リモートコントローラーとして機能するものである。空気調和装置１００は、冷媒回路Ｃの凝縮温度を検出する凝縮温度検出部Ｄ１と、室内温度を検出する室内温度検出部Ｄ２とを含む。 The air conditioner 100 includes an input device RC that gives a control command to the indoor unit 102. The input device RC functions as a remote controller. The air conditioning apparatus 100 includes a condensation temperature detection unit D1 that detects the condensation temperature of the refrigerant circuit C, and an indoor temperature detection unit D2 that detects the room temperature.
　圧縮機１は、吸入した低圧冷媒を圧縮し、高圧冷媒として吐出する流体機械である。圧縮機１は、例えば、インバータにより回転数が制御される。圧縮機１は、高圧冷媒を吐出する冷媒吐出部と冷媒回路Ｃを循環して戻ってきた低圧冷媒を吸入する冷媒吸入部とを備えている。 Compressor 1 is a fluid machine that compresses sucked low-pressure refrigerant and discharges it as high-pressure refrigerant. The rotation speed of the compressor 1 is controlled by an inverter, for example. The compressor 1 includes a refrigerant discharge portion that discharges high-pressure refrigerant and a refrigerant suction portion that sucks low-pressure refrigerant that circulates and returns through the refrigerant circuit C.
　四方弁２は、圧縮機１の冷媒吐出部と第２の熱交換器３とを連通し、且つ、圧縮機１の冷媒吸入部と第１の熱交換器５とを連通する第１の流路と、圧縮機１の冷媒吐出部と第１の熱交換器５とを連通し、且つ、圧縮機１の冷媒吸入部と第２の熱交換器３とを連通する第２の流路とを含む。四方弁２は制御装置５０によって、第１の流路と第２の流路とが選択的に切り替えられる。冷房運転時は四方弁２が第１の流路に切り替えられ、暖房運転時は四方弁２が第２の流路に切り替えられる。 The four-way valve 2 communicates the refrigerant discharge part of the compressor 1 and the second heat exchanger 3, and communicates the refrigerant suction part of the compressor 1 and the first heat exchanger 5. A second flow path that communicates the passage, the refrigerant discharge portion of the compressor 1 and the first heat exchanger 5, and communicates the refrigerant suction portion of the compressor 1 and the second heat exchanger 3. including. The four-way valve 2 is selectively switched between the first flow path and the second flow path by the control device 50. During the cooling operation, the four-way valve 2 is switched to the first flow path, and during the heating operation, the four-way valve 2 is switched to the second flow path.
　絞り装置４は、例えば、開度を調節可能な電子膨張弁である。なお、絞り装置４はキャピラリーチューブ等の他の減圧手段を用いることもできる。 The throttle device 4 is, for example, an electronic expansion valve whose opening degree can be adjusted. The expansion device 4 can also use other decompression means such as a capillary tube.
　第１の熱交換器５は、例えば、内部を流通する冷媒と、第１の送風機５Ａにより送風される空気との熱交換を行う空冷式熱交換器として構成することができる。第１の熱交換器５は、フィンアンドチューブ型熱交換器として構成できる。第１の熱交換器５は、空気調和装置１００が冷房運転を実行している場合には蒸発器として機能し、暖房運転を実行している場合には凝縮器として機能する。第１の送風機５Ａは、図示省略の電動機と、電動機に回転させられるファンとを備えている。第１の送風機５Ａは、第１の熱交換器５に供給する空気の風量を可変に調整できるように、回転数が制御される。なお、第１の送風機５Ａの回転数とは第１の送風機５Ａのファン回転数である。本実施の形態において、第１の送風機５Ａに設定することができる回転数（風量）は少なくとも７つある（図２Ｂ参照）。 The first heat exchanger 5 can be configured, for example, as an air-cooled heat exchanger that performs heat exchange between the refrigerant circulating inside and the air blown by the first blower 5A. The first heat exchanger 5 can be configured as a fin-and-tube heat exchanger. The first heat exchanger 5 functions as an evaporator when the air-conditioning apparatus 100 is performing a cooling operation, and functions as a condenser when a heating operation is being performed. The first blower 5A includes an electric motor (not shown) and a fan that is rotated by the electric motor. The rotation speed of the first blower 5 </ b> A is controlled so that the amount of air supplied to the first heat exchanger 5 can be variably adjusted. The rotational speed of the first blower 5A is the rotational speed of the fan of the first blower 5A. In the present embodiment, there are at least seven rotation speeds (air volumes) that can be set in the first blower 5A (see FIG. 2B).
　第２の熱交換器３は、例えば、内部を流通する冷媒と、第２の送風機３Ａにより送風される空気との熱交換を行う空冷式熱交換器として構成することができる。空冷式熱源側熱交換器は、例えば、伝熱管と複数のフィンとにより構成されたクロスフィン式のフィンアンドチューブ型熱交換器として構成できる。第２の熱交換器３は、空気調和装置１００が冷房運転を実行している場合には凝縮器（放熱器）として機能し、暖房運転を実行している場合には蒸発器として機能する。 The second heat exchanger 3 can be configured as, for example, an air-cooled heat exchanger that performs heat exchange between the refrigerant circulating inside and the air blown by the second blower 3A. The air-cooling heat source side heat exchanger can be configured as, for example, a cross-fin type fin-and-tube heat exchanger including a heat transfer tube and a plurality of fins. The second heat exchanger 3 functions as a condenser (heat radiator) when the air-conditioning apparatus 100 is performing the cooling operation, and functions as an evaporator when the heating operation is being performed.
　制御装置５０は、圧縮機１、絞り装置４、第２の送風機３Ａ及び第１の送風機５Ａ等を統括制御する。制御装置５０は、凝縮温度検出部Ｄ１から送信される凝縮温度データ及び室内温度検出部Ｄ２から送信される室内温度データを取得する。制御装置５０に含まれる各機能部は、専用のハードウェア、またはメモリに格納されるプログラムを実行するＭＰＵ（Micro Processing Unit）で構成される。制御装置５０が専用のハードウェアである場合、制御装置５０は、例えば、単一回路、複合回路、ＡＳＩＣ（application specific integrated circuit）、ＦＰＧＡ（field-programmable gate array）、またはこれらを組み合わせたものが該当する。制御装置５０が実現する各機能部のそれぞれを、個別のハードウェアで実現してもよいし、各機能部を一つのハードウェアで実現してもよい。制御装置５０がＭＰＵの場合、制御装置５０が実行する各機能は、ソフトウェア、ファームウェア、またはソフトウェアとファームウェアとの組み合わせにより実現される。ソフトウェアやファームウェアはプログラムとして記述され、メモリに格納される。ＭＰＵは、メモリに格納されたプログラムを読み出して実行することにより、制御装置５０の各機能を実現する。メモリは、例えば、ＲＡＭ、ＲＯＭ、フラッシュメモリ、ＥＰＲＯＭ、ＥＥＰＲＯＭ等の、不揮発性または揮発性の半導体メモリである。 The control device 50 comprehensively controls the compressor 1, the expansion device 4, the second blower 3A, the first blower 5A, and the like. The control device 50 acquires the condensation temperature data transmitted from the condensation temperature detection unit D1 and the room temperature data transmitted from the room temperature detection unit D2. Each functional unit included in the control device 50 is configured by dedicated hardware or MPU (Micro Processing Unit) that executes a program stored in a memory. When the control device 50 is dedicated hardware, the control device 50 may be, for example, a single circuit, a composite circuit, an ASIC (application specific integrated circuit), an FPGA (field-programmable gate array), or a combination thereof. Applicable. Each functional unit realized by the control device 50 may be realized by individual hardware, or each functional unit may be realized by one piece of hardware. When the control device 50 is an MPU, each function executed by the control device 50 is realized by software, firmware, or a combination of software and firmware. Software and firmware are described as programs and stored in a memory. The MPU implements each function of the control device 50 by reading and executing a program stored in the memory. The memory is a nonvolatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM.
　入力装置ＲＣは、例えば、暖房運転及び冷房運転の制御指令、室内機１０２から吹き出す空気の風量に係る制御指令、及び、室内の設定温度に係る制御指令を室内機１０２に送信することができるように構成されている。入力装置ＲＣは、室内機１０２に、有線で接続されていてもよいし、無線で接続されていてもよい。なお、入力装置ＲＣは、予め定められたアプリケーションを備えた携帯端末（例えば、携帯電話）で構成することもできる。
　入力装置ＲＣは、設定風量を受け付ける風量設定部ＲＣ１と、室内設定温度を受け付ける室内温度設定部ＲＣ２と、各種運転モードを受け付ける運転モード設定部ＲＣ３とを備えている。運転モードには、暖房運転があり、その他に冷房運転があってもよい。風量設定部ＲＣ１、室内温度設定部ＲＣ２及び運転モード設定部ＲＣ３は、例えば、ユーザーが操作するボタン等で構成することができる。風量設定部ＲＣ１は、複数の風量を受け付けるように構成されている。本実施の形態では、制御装置５０には、第１の設定風量である風量大（Ｈｉ）と、第２の設定風量である風量中２（Ｍｉｄ２）と、第３の設定風量である風量中１（Ｍｉｄ１）と、第４の設定風量である風量小（Ｌｏ）との４段階の風量を設定することができる。風量大、風量中２、風量中１、及び、風量小の順番に風量が小さくなる。なお、設定風量は４段階に限定されるものではなく、１～３段階でもよいし、５段階以上であってもよい。 For example, the input device RC can transmit to the indoor unit 102 a control command for heating operation and cooling operation, a control command for the air volume blown from the indoor unit 102, and a control command for the indoor set temperature. It is configured. The input device RC may be connected to the indoor unit 102 by wire or may be connected wirelessly. Note that the input device RC can also be configured by a mobile terminal (for example, a mobile phone) provided with a predetermined application.
The input device RC includes an air volume setting unit RC1 that receives a set air volume, an indoor temperature setting unit RC2 that receives an indoor set temperature, and an operation mode setting unit RC3 that receives various operation modes. In the operation mode, there is a heating operation, and there may be a cooling operation. The air volume setting unit RC1, the room temperature setting unit RC2, and the operation mode setting unit RC3 can be configured with buttons operated by the user, for example. The air volume setting unit RC1 is configured to receive a plurality of air volumes. In the present embodiment, the control device 50 has a large air volume (Hi) that is the first set air volume, a medium air volume 2 (Mid2) that is the second set air volume, and a medium air volume that is the third set air volume. It is possible to set four levels of air volume, 1 (Mid1) and a small air volume (Lo) that is the fourth set air volume. The air volume decreases in the order of large air volume, 2 medium air volumes, 1 medium air volume, and small air volumes. The set air volume is not limited to four stages, but may be one to three stages or five stages or more.
　凝縮温度検出部Ｄ１は、第１の凝縮温度センサーＳＥ１と、第２の凝縮温度センサーＳＥ３とを含む。第１の凝縮温度センサーＳＥ１及び第２の凝縮温度センサーＳＥ３は、サーミスタ等で構成することができる。第１の凝縮温度センサーＳＥ１は、室内機１０２に搭載された第１の熱交換器５に設けられている。第１の凝縮温度センサーＳＥ１は、第１の熱交換器５が放熱器として機能する暖房運転時において、冷媒の凝縮温度を検出する。一方、第２の凝縮温度センサーＳＥ３は、室外機１０１に搭載された第２の熱交換器３に設けられている。第２の凝縮温度センサーＳＥ３は、第２の熱交換器３が放熱器として機能する冷房運転時において、冷媒の凝縮温度を検出する。第１の凝縮温度センサーＳＥ１で検出された凝縮温度及び第２の凝縮温度センサーＳＥ３で検出された凝縮温度は、凝縮温度データとして、凝縮温度検出部Ｄ１から制御装置５０へ送信される。
　室内温度検出部Ｄ２は、室内温度を検出する室内温度センサーＳＥ２を含む。室内温度検出部Ｄ２は、室内機１０２に設けられている。室内温度センサーＳＥ２は、第１の送風機５Ａの作用によって、室内機１０２内に取り込まれた空気の温度（室内温度）を検出する。室内温度センサーＳＥ２は、サーミスタ等で構成することができる。室内温度センサーＳＥ２で検出された室内温度は、室内温度データとして室内温度検出部Ｄ２から制御装置５０へ送信される。 The condensation temperature detector D1 includes a first condensation temperature sensor SE1 and a second condensation temperature sensor SE3. The first condensation temperature sensor SE1 and the second condensation temperature sensor SE3 can be composed of a thermistor or the like. The first condensing temperature sensor SE <b> 1 is provided in the first heat exchanger 5 mounted on the indoor unit 102. The first condensing temperature sensor SE1 detects the condensing temperature of the refrigerant during the heating operation in which the first heat exchanger 5 functions as a radiator. On the other hand, the second condensing temperature sensor SE3 is provided in the second heat exchanger 3 mounted on the outdoor unit 101. The second condensing temperature sensor SE3 detects the condensing temperature of the refrigerant during the cooling operation in which the second heat exchanger 3 functions as a radiator. The condensation temperature detected by the first condensation temperature sensor SE1 and the condensation temperature detected by the second condensation temperature sensor SE3 are transmitted from the condensation temperature detection unit D1 to the control device 50 as condensation temperature data.
The room temperature detection unit D2 includes a room temperature sensor SE2 that detects the room temperature. The indoor temperature detection unit D2 is provided in the indoor unit 102. The indoor temperature sensor SE2 detects the temperature (indoor temperature) of the air taken into the indoor unit 102 by the action of the first blower 5A. The indoor temperature sensor SE2 can be composed of a thermistor or the like. The room temperature detected by the room temperature sensor SE2 is transmitted from the room temperature detection unit D2 to the control device 50 as room temperature data.
［暖房運転及び冷房運転の動作説明］
　冷房運転を行う場合には、圧縮機１によって圧縮された冷媒が高温高圧の冷媒となって四方弁２を通り第２の熱交換器３に供給される。第２の熱交換器３に供給された冷媒は、空気と熱交換して放熱して凝縮し、高圧の液冷媒となり、絞り装置４に供給される。絞り装置４に供給された冷媒は、減圧されて低温低圧の二相冷媒となり、冷媒配管Ｐ２を通り、室内機１０２の第１の熱交換器５に供給される。第１の熱交換器５に供給された冷媒は、室内の空気と熱交換して吸熱し、蒸発気化して低温のガス冷媒となる。このとき、室内の空気は冷媒に冷却される。そして、冷却された空気は、第１の送風機５Ａの作用によって室内機１０２の吹出口から室内に供給される。第１の熱交換器５を通過した冷媒は、冷媒配管Ｐ１を通り室外機１０１に戻り、四方弁２を通って圧縮機１に戻される。 [Explanation of heating and cooling operations]
When the cooling operation is performed, the refrigerant compressed by the compressor 1 becomes a high-temperature and high-pressure refrigerant and is supplied to the second heat exchanger 3 through the four-way valve 2. The refrigerant supplied to the second heat exchanger 3 exchanges heat with air, dissipates heat, condenses, becomes a high-pressure liquid refrigerant, and is supplied to the expansion device 4. The refrigerant supplied to the expansion device 4 is reduced in pressure to become a low-temperature and low-pressure two-phase refrigerant, passes through the refrigerant pipe P2, and is supplied to the first heat exchanger 5 of the indoor unit 102. The refrigerant supplied to the first heat exchanger 5 exchanges heat with indoor air to absorb heat, evaporates and becomes a low-temperature gas refrigerant. At this time, the indoor air is cooled by the refrigerant. And the cooled air is supplied indoors from the blower outlet of the indoor unit 102 by the effect | action of 5 A of 1st air blowers. The refrigerant that has passed through the first heat exchanger 5 returns to the outdoor unit 101 through the refrigerant pipe P1, and returns to the compressor 1 through the four-way valve 2.
　暖房運転を行う場合には、圧縮機１によって圧縮された冷媒は高温高圧の冷媒となって四方弁２及び冷媒配管Ｐ１を通り室内機１０２の第１の熱交換器５に供給される。そして、第１の熱交換器５に供給された冷媒は、空気と熱交換して放熱して凝縮し、高圧の液冷媒となる。このとき、室内の空気は加熱される。加熱された空気は、第１の送風機５Ａの作用によって室内機１０２の吹出口から室内に供給される。第１の熱交換器５を通過した冷媒は、冷媒配管Ｐ２を通り室外機１０１に戻り、絞り装置４に供給される。絞り装置４に供給された冷媒は、減圧されて低温低圧の二相冷媒となり、第２の熱交換器３に供給される。第２の熱交換器３に供給された冷媒は、空気と熱交換して吸熱し、蒸発気化して低温のガス冷媒となる。そして、第２の熱交換器３を通過した冷媒は、四方弁２を通って圧縮機１に戻される。 When performing the heating operation, the refrigerant compressed by the compressor 1 becomes a high-temperature and high-pressure refrigerant and is supplied to the first heat exchanger 5 of the indoor unit 102 through the four-way valve 2 and the refrigerant pipe P1. And the refrigerant | coolant supplied to the 1st heat exchanger 5 heat-exchanges with air, dissipates heat, condenses, and turns into a high voltage | pressure liquid refrigerant. At this time, indoor air is heated. The heated air is supplied into the room from the outlet of the indoor unit 102 by the action of the first blower 5A. The refrigerant that has passed through the first heat exchanger 5 returns to the outdoor unit 101 through the refrigerant pipe P <b> 2 and is supplied to the expansion device 4. The refrigerant supplied to the expansion device 4 is depressurized to become a low-temperature and low-pressure two-phase refrigerant and supplied to the second heat exchanger 3. The refrigerant supplied to the second heat exchanger 3 exchanges heat with air to absorb heat, evaporates and becomes a low-temperature gas refrigerant. Then, the refrigerant that has passed through the second heat exchanger 3 is returned to the compressor 1 through the four-way valve 2.
［制御装置５０について］
　図２Ａは、本実施の形態に係る空気調和装置１００の制御装置５０の機能ブロック図である。
　図２Ｂは、第１の送風機５Ａに現在設定されている回転数を補正するときに用いるテーブルの説明図である。なお、図２Ｂに示す１～７の数字は、第１の送風機５Ａの回転数の大小関係を示すものである。 [About the control device 50]
FIG. 2A is a functional block diagram of control device 50 of air-conditioning apparatus 100 according to the present embodiment.
FIG. 2B is an explanatory diagram of a table used when correcting the rotation speed currently set in the first blower 5A. The numbers 1 to 7 shown in FIG. 2B indicate the magnitude relationship of the rotational speed of the first blower 5A.
　制御装置５０は、判定部５０Ａ（各種の温度到達の判定）と、回転数補正部５０Ｂと、目標温度算出部５０Ｃと、出力制御装置５０Ｄと、記憶部５０Ｅとを備えている。なお、図示は省略しているが、制御装置５０は、タイマーを備えており、時間を計測する機能を有している。 The control device 50 includes a determination unit 50A (determination of various temperature arrivals), a rotation speed correction unit 50B, a target temperature calculation unit 50C, an output control device 50D, and a storage unit 50E. In addition, although illustration is abbreviate | omitted, the control apparatus 50 is provided with the timer, and has the function to measure time.
（判定部５０Ａ）
　判定部５０Ａは、室内温度検出部Ｄ２から送信される室内温度データに基づいて、室内が目標温度に到達したか否かを判定する。また、判定部５０Ａは、凝縮温度検出部Ｄ１から送信される凝縮温度データに基づいて、第１の送風機５Ａの回転数を補正するか否かを判定する。判定部５０Ａは、凝縮温度データによって特定される凝縮温度が、予め定められた温度以上である場合に補正をすると判定し、予め定められた温度未満である場合に補正をしないと判定する。 (Determination unit 50A)
The determination unit 50A determines whether or not the room has reached the target temperature based on the room temperature data transmitted from the room temperature detection unit D2. Further, the determination unit 50A determines whether or not to correct the rotation speed of the first blower 5A based on the condensation temperature data transmitted from the condensation temperature detection unit D1. The determination unit 50A determines that correction is performed when the condensation temperature specified by the condensation temperature data is equal to or higher than a predetermined temperature, and determines that correction is not performed when the temperature is lower than the predetermined temperature.
（回転数補正部５０Ｂ）
　回転数補正部５０Ｂは、判定部５０Ａが第１の送風機５Ａの回転数を補正すると判定した場合に、第１の送風機５Ａの回転数の補正値（補正後回転数）を算出する。回転数補正部５０Ｂは、凝縮温度データによって特定される凝縮温度の大きさに応じて、補正後回転数を算出する。 (Rotation speed correction unit 50B)
When the determination unit 50A determines that the rotation number of the first blower 5A is to be corrected, the rotation number correction unit 50B calculates a correction value (corrected rotation number) of the rotation number of the first blower 5A. The rotation speed correction unit 50B calculates the corrected rotation speed in accordance with the magnitude of the condensation temperature specified by the condensation temperature data.
　回転数補正部５０Ｂは、図２Ｂに示すように、記憶部５０Ｅに格納された補正後回転数算出テーブルを用いて、補正後の回転数を算出する。なお、ここでは、補正後回転数算出テーブルを用いる態様について説明するが、予め定められた演算式を記憶部５０Ｅに記憶しておきこの演算式と、凝縮温度及び設定風量とに基づいて、補正後回転数を算出してもよい。 As shown in FIG. 2B, the rotation speed correction unit 50B calculates the corrected rotation speed using the corrected rotation speed calculation table stored in the storage unit 50E. Here, although an embodiment using the corrected rotation speed calculation table will be described, a predetermined arithmetic expression is stored in the storage unit 50E, and correction is performed based on the arithmetic expression, the condensation temperature, and the set air volume. The post-rotation speed may be calculated.
　回転数補正部５０Ｂは、凝縮温度が大きさに応じて、補正後回転数を小さくするように構成されている。例えば、現在の設定風量が風量小（Ｌｏ）である場合においては次のような補正後回転数とする。ここで、風量小（Ｌｏ）に対応する回転数の大きさは４である。（１）回転数補正部５０Ｂは、凝縮温度が第１の温度Ｔ１未満である場合には、第１の送風機５Ａの設定回転数を、現在の設定回転数のままとすると決定する。（２）回転数補正部５０Ｂは、凝縮温度が第１の温度Ｔ１以上であって第２の温度Ｔ２未満である場合には、第１の送風機５Ａの設定回転数を、大きさ４である現在の設定回転数から、大きさ３である補正後回転数（第１の回転数）へ変更する決定する。（３）回転数補正部５０Ｂは、凝縮温度が第２の温度Ｔ２以上であって第３の温度Ｔ３未満である場合には、第１の送風機５Ａの設定回転数を、大きさ４である現在の設定回転数から、大きさ２である補正後回転数（第２の回転数）へ変更すると決定する。（４）回転数補正部５０Ｂは、凝縮温度が第３の温度Ｔ３以上である場合には、第１の送風機５Ａの設定回転数を、大きさ４である現在の設定回転数から、大きさ１である補正後回転数（第３の回転数）へ変更すると決定する。なお、現在の設定回転数、第１の回転数、第２の回転数及び第３の回転数の順番で大きさが小さい。このように凝縮温度が予め定められた温度（第１の温度Ｔ１）未満である場合には上記（１）のように回転数の補正がなされないが、凝縮温度が予め定められた温度（第１の温度Ｔ１）以上である場合には上記（２）～（４）のように回転数の補正が行われ、第１の送風機５Ａの設定回転数が低下する。本実施の形態では、補正後回転数は３段階（第１の回転数、第２の回転数及び第３の回転数）に変更できるようになっている例を説明しているが、１段階でもよいし、２段階でもよいし、４段階以上でもよい。 The rotation speed correction unit 50B is configured to reduce the corrected rotation speed according to the size of the condensation temperature. For example, when the current set air volume is a small air volume (Lo), the rotation speed after correction is as follows. Here, the rotational speed corresponding to the small air volume (Lo) is 4. (1) When the condensation temperature is lower than the first temperature T1, the rotation speed correction unit 50B determines that the set rotation speed of the first blower 5A remains the current set rotation speed. (2) When the condensation temperature is equal to or higher than the first temperature T1 and lower than the second temperature T2, the rotation speed correction unit 50B sets the set rotation speed of the first blower 5A to a size 4. A decision is made to change from the currently set rotational speed to a corrected rotational speed (first rotational speed) of size 3. (3) When the condensation temperature is equal to or higher than the second temperature T2 and lower than the third temperature T3, the rotation speed correction unit 50B sets the set rotation speed of the first blower 5A to a size 4. It is determined that the current set rotational speed is changed to a post-correction rotational speed (second rotational speed) having a magnitude of 2. (4) When the condensing temperature is equal to or higher than the third temperature T3, the rotation speed correction unit 50B increases the setting rotation speed of the first blower 5A from the current setting rotation speed of size 4. It is determined to change to a post-correction rotational speed (third rotational speed) that is 1. In addition, the magnitude | size is small in order of the present setting rotation speed, 1st rotation speed, 2nd rotation speed, and 3rd rotation speed. As described above, when the condensation temperature is lower than the predetermined temperature (first temperature T1), the rotational speed is not corrected as in the above (1), but the condensation temperature is the predetermined temperature (first temperature T1). When the temperature is equal to or higher than the temperature T1), the rotational speed is corrected as in (2) to (4) above, and the set rotational speed of the first blower 5A is reduced. In the present embodiment, an example has been described in which the post-correction rotational speed can be changed in three stages (first rotational speed, second rotational speed, and third rotational speed). However, it may be two stages or four stages or more.
　また、回転数補正部５０Ｂは、入力装置ＲＣによって設定された第１の送風機５Ａの設定風量に応じて、補正後回転数を小さくするように構成されている。例えば、現在の設定風量が第１の設定風量である風量大（Ｈｉ）である場合においては、第１の送風機５Ａの第１の回転数が大きさ６であり、現在の設定風量が第２の設定風量である風量中２（Ｍｉｄ２）である場合においては第１の送風機５Ａの第１の回転数が大きさ５であり、現在の設定風量が第３の設定風量である風量中１（Ｍｉｄ１）である場合においては第１の送風機５Ａの第１の回転数が大きさ４であり、現在の設定風量が第４の設定風量である風量小（Ｌｏ）である場合においては第１の送風機５Ａの第１の回転数が大きさ３である。このように、入力装置ＲＣによって設定された第１の送風機５Ａの設定風量が小さくなる程、第１の回転数が小さくなっていく。同じように、第２の回転数及び第３の回転数も、設定風量が小さくなると、小さくなっていく。 Further, the rotation speed correction unit 50B is configured to reduce the corrected rotation speed in accordance with the set air volume of the first blower 5A set by the input device RC. For example, when the current set air volume is a large air volume (Hi) that is the first set air volume, the first rotational speed of the first blower 5A is 6 and the current set air volume is the second. When the air flow rate is 2 (Mid2), the first rotational speed of the first blower 5A is 5 and the current air flow rate is 1 (3). In the case of Mid1), the first rotational speed of the first blower 5A is 4 and the current set air volume is the fourth set air volume, which is the low air volume (Lo). The first rotational speed of the blower 5 </ b> A is 3. Thus, the 1st number of rotations becomes small, so that the setting air volume of 5 A of 1st fans set by input device RC becomes small. Similarly, the second rotation speed and the third rotation speed also decrease as the set air volume decreases.
　ここで、補正後回転数には、複数の設定風量のうちの最小風量に対応する回転数よりも、低い回転数が含まれている。つまり、制御装置５０は、入力装置ＲＣで設定することができる設定風量としては最小である第４の設定風量よりも小さい風量で、第１の送風機５Ａを運転させることができる。制御装置５０及び第１の送風機５Ａは、設定風量としては最小である第４の設定風量に対応する回転数よりも、小さい回転数で運転することができるように構成されているということである。これにより、より確実に、第１の送風機５Ａの消費電力を抑えることができ、省エネルギー性を向上させることができる。ここで説明した回転数は、図２Ｂにおいて、大きさ１～大きさ３の回転数に対応している。 Here, the corrected rotational speed includes a rotational speed lower than the rotational speed corresponding to the minimum air volume among the plurality of set air volumes. That is, the control device 50 can operate the first blower 5A with an air volume smaller than the fourth set air volume that is the minimum as the set air volume that can be set by the input device RC. The control device 50 and the first blower 5A are configured to be able to be operated at a rotational speed smaller than the rotational speed corresponding to the fourth set air volume that is the minimum as the set air volume. . Thereby, the power consumption of 5 A of 1st air blowers can be suppressed more reliably, and energy saving property can be improved. The rotation speed described here corresponds to the rotation speeds of magnitude 1 to magnitude 3 in FIG. 2B.
（目標温度算出部５０Ｃ）
　目標温度算出部５０Ｃは、入力装置ＲＣから送信される室内設定温度データに基づいて、室内の目標温度を算出する。目標温度は、通常、入力装置ＲＣで設定される設定温度と同等の温度である。ここで、例えばパワフル運転を実行するように入力装置ＲＣから設定されていると、目標温度は、入力装置ＲＣで設定される設定温度からずれた値となる。例えば、暖房運転及びパワフル運転を実行するように入力装置ＲＣから設定されている場合には、目標温度算出部５０Ｃは、目標温度として、設定温度よりも高い温度を算出する。これにより、現在の室内温度と目標温度との差が増大するため、空気調和装置１００は、より暖房能力が高い運転を実行することになる。例えば、制御装置５０は、圧縮機１の回転数を増大させることになる。 (Target temperature calculation unit 50C)
The target temperature calculation unit 50C calculates the indoor target temperature based on the indoor set temperature data transmitted from the input device RC. The target temperature is usually a temperature equivalent to a set temperature set by the input device RC. Here, for example, if the input device RC is set to execute a powerful operation, the target temperature is a value deviated from the set temperature set by the input device RC. For example, when the input device RC is set to execute the heating operation and the powerful operation, the target temperature calculation unit 50C calculates a temperature higher than the set temperature as the target temperature. Thereby, since the difference between the current indoor temperature and the target temperature increases, the air conditioner 100 performs an operation with a higher heating capacity. For example, the control device 50 increases the rotational speed of the compressor 1.
（出力制御装置５０Ｄ）
　出力制御装置５０Ｄは、判定部５０Ａの判定結果、回転数補正部５０Ｂの算出結果、及び、記憶部５０Ｅに格納されたデータ等に基づいて、各種の機器を制御する。出力制御装置５０Ｄは、圧縮機１、絞り装置４、第２の送風機３Ａ及び第１の送風機５Ａの少なくとも一つを制御する。 (Output control device 50D)
The output control device 50D controls various devices based on the determination result of the determination unit 50A, the calculation result of the rotation speed correction unit 50B, the data stored in the storage unit 50E, and the like. The output control device 50D controls at least one of the compressor 1, the expansion device 4, the second blower 3A, and the first blower 5A.
（記憶部５０Ｅ）
　記憶部５０Ｅには、各種のデータが格納される。例えば、記憶部５０Ｅは、凝縮温度データ及び室内温度データ等の各種データが格納されている。また、記憶部５０Ｅには、補正後回転数算出テーブルが格納されている。制御装置５０が補正後回転数算出テーブルの代わりに補正後回転数を算出する演算式を用いる場合には、記憶部５０Ｅには当該演算式が格納されている。 (Storage unit 50E)
Various data are stored in the storage unit 50E. For example, the storage unit 50E stores various data such as condensation temperature data and room temperature data. The storage unit 50E stores a corrected rotation speed calculation table. When the control device 50 uses an arithmetic expression for calculating the corrected rotational speed instead of the corrected rotational speed calculation table, the arithmetic expression is stored in the storage unit 50E.
［制御フロー］
　図３は、本実施の形態に係る空気調和装置１００の制御フローの説明図である。
　図３を参照して、空気調和装置１００の制御フローの一例を説明する。この制御フローでは、暖房運転時を想定している。 [Control flow]
FIG. 3 is an explanatory diagram of a control flow of the air-conditioning apparatus 100 according to the present embodiment.
With reference to FIG. 3, an example of the control flow of the air conditioning apparatus 100 will be described. In this control flow, the heating operation is assumed.
　目標温度算出部５０Ｃは、入力装置ＲＣから送信されるデータ（例えば、室内設定温度データ）に基づいて、目標温度を算出する（ステップＳ１）。制御装置５０は、室内温度を取得している。ここで、室内温度は、室内温度検出部Ｄ２から送信される室内温度データによって特定される。判定部５０Ａは、目標温度と室内温度とを比較する（ステップＳ３）。目標温度から室内温度を減算した値の絶対値が、予め定められた値以上である場合には制御装置５０はステップＳ３からステップＳ４－１に進み、予め定められた値未満である場合には制御装置５０はステップＳ３からステップＳ４－２に進む。 The target temperature calculation unit 50C calculates a target temperature based on data (for example, indoor set temperature data) transmitted from the input device RC (step S1). The control device 50 acquires the room temperature. Here, the room temperature is specified by room temperature data transmitted from the room temperature detection unit D2. The determination unit 50A compares the target temperature with the room temperature (step S3). When the absolute value of the value obtained by subtracting the room temperature from the target temperature is equal to or greater than a predetermined value, the control device 50 proceeds from step S3 to step S4-1. When the absolute value is less than the predetermined value, The control device 50 proceeds from step S3 to step S4-2.
　出力制御装置５０Ｄは、目標温度から室内温度を減算した値の絶対値が、予め定められた値以上であると判定された場合には、目標温度と室内温度との開きがあることから、圧縮機１の回転数を維持又は増加させる（ステップＳ４－１）。出力制御装置５０Ｄは、目標温度から室内温度を減算した値の絶対値が、予め定められた値未満であると判定された場合には、目標温度と室内温度との開き無い又は小さいことから、圧縮機１の回転数を低下させる（ステップＳ４－２）。 When it is determined that the absolute value of the value obtained by subtracting the room temperature from the target temperature is equal to or greater than a predetermined value, the output control device 50D compresses the target temperature and the room temperature because there is an opening. The rotational speed of the machine 1 is maintained or increased (step S4-1). When the output control device 50D determines that the absolute value of the value obtained by subtracting the room temperature from the target temperature is less than a predetermined value, the target temperature and the room temperature do not open or are small. The rotational speed of the compressor 1 is reduced (step S4-2).
　制御装置５０は、第１の熱交換器５の凝縮温度を取得している。ここで、凝縮温度は、凝縮温度検出部Ｄ１から送信される凝縮温度データによって特定される。判定部５０Ａは、第２の熱交換器の凝縮温度に基づいて、第１の送風機５Ａの現在の設定回転数を補正するか否かを判定する（ステップＳ６）。 The control device 50 acquires the condensation temperature of the first heat exchanger 5. Here, the condensation temperature is specified by the condensation temperature data transmitted from the condensation temperature detection unit D1. The determination unit 50A determines whether or not to correct the current set rotational speed of the first blower 5A based on the condensation temperature of the second heat exchanger (step S6).
　制御装置５０は、第１の送風機５Ａの現在の設定回転数を補正すると判定した場合にはステップＳ７に進み、第１の送風機５Ａの現在の設定回転数を補正しないと判定した場合にはステップＳ１に戻る。回転数補正部５０Ｂは、第１の熱交換器５の凝縮温度と、第１の送風機５Ａの設定風量とに基づいて、補正後回転数を算出する（ステップＳ７）。出力制御装置５０Ｄは、補正後回転数で第１の送風機５Ａを運転する（ステップＳ８）。 If it is determined that the current set rotational speed of the first blower 5A is to be corrected, the control device 50 proceeds to step S7, and if it is determined not to correct the current set rotational speed of the first blower 5A, the control device 50 performs a step. Return to S1. The rotation speed correction unit 50B calculates the corrected rotation speed based on the condensation temperature of the first heat exchanger 5 and the set air volume of the first blower 5A (step S7). The output control device 50D operates the first blower 5A at the corrected rotational speed (step S8).
［室内温度の時間変化及び送風機の回転数の時間変化］
　図４は、室内温度の時間変化及び送風機の回転数の時間変化の説明図である。
　図４（ａ）は、従来制御の室内温度の推移と、本実施の形態の室内温度の推移を示している。
　図４（ｂ）は、従来制御の第２の送風機の回転数の推移を示している。
　図４（ｃ）は、本実施の形態の第１の送風機５Ａの回転数の推移を示している。 [Time change of room temperature and time change of fan speed]
FIG. 4 is an explanatory diagram of the time change of the room temperature and the time change of the rotational speed of the blower.
FIG. 4A shows the transition of the indoor temperature in the conventional control and the transition of the indoor temperature in the present embodiment.
FIG.4 (b) has shown transition of the rotation speed of the 2nd air blower of conventional control.
FIG.4 (c) has shown transition of the rotation speed of 5 A of 1st air blowers of this Embodiment.
　図４（ａ）に示すように、従来制御では、凝縮温度の上昇に応じて第２の送風機の回転数を落とさず、室内温度が入力装置ＲＣの設定温度を超えてしまっている。つまり、従来制御では、室内に加熱された空気を余分に供給しており、その分、省エネルギー性が低くなっている。一方、本実施の形態では、凝縮温度の上昇に応じて第２の送風機の回転数を落とすため、室内温度が入力装置ＲＣの設定温度を超えないように近づいていき、省エネルギー性が向上している。 As shown in FIG. 4 (a), in the conventional control, the room temperature exceeds the set temperature of the input device RC without decreasing the rotational speed of the second blower according to the increase in the condensation temperature. That is, in the conventional control, extra air heated in the room is supplied, and the energy saving performance is reduced accordingly. On the other hand, in this Embodiment, since the rotation speed of a 2nd air blower is dropped according to the rise in condensation temperature, it approaches so that indoor temperature may not exceed the preset temperature of input device RC, and energy-saving property improves. Yes.
［実施の形態の効果］
　本実施の形態に係る空気調和装置１００の室内機１０２は、暖房運転を実行しているときに凝縮温度が予め定められた温度以上となった場合には、第１の送風機５Ａの現在の設定回転数を、現在の設定回転数よりも小さい補正後回転数へ、低下させるように構成されている。この補正後回転数は、凝縮温度の大きさに応じて定められる。凝縮温度が大きい程、補正後回転数は小さい。このため、室内機１０２は、室内に加熱された空気を余分に供給しなくて済む分、第１の送風機５Ａの消費電力を抑えることができ、省エネルギー性を向上させることができる。 [Effect of the embodiment]
The indoor unit 102 of the air conditioner 100 according to the present embodiment has the current setting of the first blower 5A when the condensing temperature is equal to or higher than a predetermined temperature during the heating operation. The rotational speed is reduced to a corrected rotational speed that is smaller than the currently set rotational speed. The post-correction rotational speed is determined according to the magnitude of the condensation temperature. The higher the condensing temperature, the smaller the corrected rotation speed. For this reason, the indoor unit 102 can suppress the power consumption of the first blower 5 </ b> A as much as it is not necessary to supply extra air heated indoors, and can improve energy saving.
［制御フローチャートの変形例］
　図５は、図３に示す制御フローチャートの変形例である。なお、ここでは、本実施の形態との相違点を中心に説明するものとし、共通する構成については同じ符号を付している。図５のステップＳ１～ステップＳ８は、図３のステップＳ１～ステップＳ８と同様である。 [Modification of control flowchart]
FIG. 5 is a modification of the control flowchart shown in FIG. Here, differences from this embodiment will be mainly described, and the same reference numerals are given to common configurations. Steps S1 to S8 in FIG. 5 are the same as steps S1 to S8 in FIG.
　本実施の形態では、図３に示す制御において、絞り装置４の開度は変更しなかった。本変形例では、図５のステップＳ９に示すように、ステップＳ８の後に、絞り装置４の開度を大きくするステップＳ９が追加されている。 In the present embodiment, the opening degree of the expansion device 4 was not changed in the control shown in FIG. In this modification, as shown in step S9 of FIG. 5, step S9 for increasing the opening degree of the expansion device 4 is added after step S8.
　具体的には、制御装置５０は、現在の設定回転数を補正後回転数へ低下させた場合には、絞り装置４の開度を大きくするように構成されている。これにより、第１の熱交換器５の凝縮温度が上昇しすぎないようにすることができる。つまり、第１の送風機５Ａの回転数を補正後回転数へ低下させると、第１の熱交換器５に供給される空気の流量が低下し、凝縮温度が上昇するように作用する場合がある。すると、第１の送風機５Ａの回転数を補正後回転数へ低下させると、凝縮温度が上昇して、更に、第１の送風機５Ａの回転数を補正後回転数へ低下させるといった事態が生じうる。こういった事態を回避するために、本変形例では、現在の設定回転数を補正後回転数へ低下させた場合には、絞り装置４の開度を大きくする。 Specifically, the control device 50 is configured to increase the opening degree of the expansion device 4 when the current set rotational speed is reduced to the corrected rotational speed. Thereby, it is possible to prevent the condensation temperature of the first heat exchanger 5 from rising too much. That is, when the rotation speed of the first blower 5A is decreased to the corrected rotation speed, the flow rate of the air supplied to the first heat exchanger 5 may decrease and the condensation temperature may increase. . Then, when the rotation speed of the first blower 5A is reduced to the corrected rotation speed, the condensing temperature increases, and further, the rotation speed of the first blower 5A may be decreased to the corrected rotation speed. . In order to avoid such a situation, in the present modification, when the current set rotational speed is reduced to the post-correction rotational speed, the opening degree of the expansion device 4 is increased.
　制御装置５０は、現在の設定回転数を補正後回転数へ低下させるタイミングで、絞り装置４の開度を大きくする。これにより、より確実に、上述したような事態を回避することができる。ここで、現在の設定回転数を補正後回転数へ低下させるタイミングについて説明する。例えば、現在の設定回転数を補正後回転数へ低下させると同時に、絞り装置４の開度を大きくしてもよい。また、同時に限定されるものではなく、現在の設定回転数を補正後回転数へ低下させた直後に、絞り装置４の開度を大きくしてもよい。また、現在の設定回転数を補正後回転数へ低下させる直前に、絞り装置４の開度を大きくしてもよい。 The control device 50 increases the opening degree of the expansion device 4 at the timing to reduce the current set rotational speed to the corrected rotational speed. Thereby, the situation as described above can be avoided more reliably. Here, the timing at which the current set rotational speed is reduced to the corrected rotational speed will be described. For example, the opening degree of the expansion device 4 may be increased at the same time as the current set rotational speed is reduced to the corrected rotational speed. Moreover, it is not limited simultaneously, and the opening degree of the expansion device 4 may be increased immediately after the current set rotational speed is reduced to the corrected rotational speed. Further, the opening degree of the expansion device 4 may be increased immediately before the current set rotational speed is reduced to the corrected rotational speed.
［冷媒回路の変形例］
　図６は、図１に示す冷媒回路の変形例である。なお、ここでは、本実施の形態との相違点を中心に説明するものとし、共通する構成については同じ符号を付している。 [Modified example of refrigerant circuit]
FIG. 6 is a modification of the refrigerant circuit shown in FIG. Here, differences from this embodiment will be mainly described, and the same reference numerals are given to common configurations.
　冷媒回路の構成は図１の態様に限定されるものではなく、図６に示す態様であってもよい。図６に示す変形例に係る空気調和装置５００は、例えば、ビル用マルチエアコンを想定している。空気調和装置５００は、室外機５０１と、室内機５０２とを備えている。空気調和装置５００には、複数の室内機５０２が設けられている。また、室外機５０１は、室外機１０１とは異なり、絞り装置４が設けられていない。その代わりに、各室内機５０２には、絞り装置４が設けられている。なお、各室内機５０２に絞り装置４を設け、更に、室外機１０１にも絞り装置が設けられている態様であってもよい。空気調和装置５００の冷媒回路ＣＣは、室外機５０１と複数の室内機５０２とが、冷媒配管Ｐ１及び冷媒配管Ｐ２を介して接続されている。図６に示す態様の空気調和装置５００であっても、本実施の形態に係る空気調和装置５００と同様の効果を得ることができる。 The configuration of the refrigerant circuit is not limited to the mode shown in FIG. 1, but may be the mode shown in FIG. An air conditioner 500 according to the modification shown in FIG. 6 is assumed to be a multi air conditioner for buildings, for example. The air conditioner 500 includes an outdoor unit 501 and an indoor unit 502. The air conditioner 500 is provided with a plurality of indoor units 502. Further, unlike the outdoor unit 101, the outdoor unit 501 is not provided with the expansion device 4. Instead, each indoor unit 502 is provided with a throttle device 4. In addition, the expansion device 4 may be provided in each indoor unit 502, and the expansion device may also be provided in the outdoor unit 101. In the refrigerant circuit CC of the air conditioner 500, an outdoor unit 501 and a plurality of indoor units 502 are connected via a refrigerant pipe P1 and a refrigerant pipe P2. Even the air conditioner 500 of the aspect shown in FIG. 6 can obtain the same effects as the air conditioner 500 according to the present embodiment.
　１　圧縮機、２　四方弁、３　第２の熱交換器、３Ａ　第２の送風機、４　絞り装置、５　第１の熱交換器、５Ａ　第１の送風機、５０　制御装置、５０Ａ　判定部、５０Ｂ　回転数補正部、５０Ｃ　目標温度算出部、５０Ｄ　出力制御装置、５０Ｅ　記憶部、１００　空気調和装置、１０１　室外機、１０２　室内機、５００　空気調和装置、５０１　室外機、５０２　室内機、Ｃ　冷媒回路、ＣＣ　冷媒回路、Ｄ１　凝縮温度検出部、Ｄ２　室内温度検出部、Ｐ１　冷媒配管、Ｐ２　冷媒配管、ＲＣ　入力装置、ＲＣ１　風量設定部、ＲＣ２　室内温度設定部、ＲＣ３　運転モード設定部、ＳＥ１　第１の凝縮温度センサー、ＳＥ２　室内温度センサー、ＳＥ３　第２の凝縮温度センサー、Ｖａ　バルブ。 1 compressor, 2-way valve, 3rd heat exchanger, 3A second blower, 4 throttling device, 5th first heat exchanger, 5A first blower, 50 control device, 50A determination unit, 50B rotation Number correction unit, 50C target temperature calculation unit, 50D output control device, 50E storage unit, 100 air conditioner, 101 outdoor unit, 102 indoor unit, 500 air conditioner, 501 outdoor unit, 502 indoor unit, C refrigerant circuit, CC Refrigerant circuit, D1 condensing temperature detection unit, D2 indoor temperature detection unit, P1 refrigerant piping, P2 refrigerant piping, RC input device, RC1 air volume setting unit, RC2 indoor temperature setting unit, RC3 operation mode setting unit, SE1 first condensing temperature Sensor, SE2 indoor temperature sensor, SE3 second condensation temperature sensor, Va valve.

Claims (7)

  1. 　凝縮器として機能する第１の熱交換器と、
    　前記第１の熱交換器に空気を供給する送風機と、
    　前記第１の熱交換器の凝縮温度を検出する凝縮温度センサーと、
    　前記凝縮温度センサーによって検出された凝縮温度に基づいて前記送風機を制御する制御装置と、
    　を備え、
    　前記制御装置は、
    　暖房運転を実行しているときに前記凝縮温度が予め定められた温度以上となった場合には、
    　前記送風機の現在の設定回転数を、前記凝縮温度の大きさに応じて定められ、前記現在の設定回転数よりも小さい補正後回転数へ、低下させるように構成されている
    　空気調和装置の室内機。     A first heat exchanger that functions as a condenser;
    A blower for supplying air to the first heat exchanger;
    A condensing temperature sensor for detecting the condensing temperature of the first heat exchanger;
    A control device for controlling the blower based on the condensation temperature detected by the condensation temperature sensor;
    With
    The control device includes:
    When the condensation temperature is equal to or higher than a predetermined temperature when performing the heating operation,
    It is configured to reduce the current set rotational speed of the blower to a corrected rotational speed that is determined according to the size of the condensation temperature and is smaller than the current set rotational speed. Machine.
  2. 　前記制御装置は、
    　前記凝縮温度が第１の温度未満の場合には、前記現在の設定回転数のまま前記送風機を運転し、
    　前記凝縮温度が前記第１の温度以上であって前記第１の温度よりも高い第２の温度未満の場合には、前記補正後回転数に対応し、前記現在の設定回転数よりも低い第１の回転数で前記送風機を運転し、
    　前記凝縮温度が前記第２の温度以上であって前記第２の温度よりも高い第３の温度未満の場合には、前記補正後回転数に対応し、前記第１の回転数よりも低い第２の回転数で前記送風機を運転する
    　請求項１に記載の空気調和装置の室内機。     The control device includes:
    When the condensation temperature is lower than the first temperature, the fan is operated with the current set rotational speed,
    When the condensing temperature is equal to or higher than the first temperature and lower than a second temperature higher than the first temperature, the condensing temperature corresponds to the post-correction speed and is lower than the current set speed. Operating the blower at a rotational speed of 1;
    When the condensing temperature is equal to or higher than the second temperature and lower than a third temperature higher than the second temperature, the condensing temperature corresponds to the post-correction rotational speed and is lower than the first rotational speed. The indoor unit of the air conditioning apparatus according to claim 1, wherein the blower is operated at a rotational speed of 2.
  3. 　設定風量を受け付ける風量設定部をさらに備え、
    　前記制御装置は、
    　前記設定風量が第１の設定風量である場合における前記第１の回転数よりも、前記設定風量が第１の設定風量よりも小さい第２の設定風量である場合における前記第１の回転数の方が小さく、
    　前記設定風量が第１の設定風量である場合における前記第２の回転数よりも、前記設定風量が前記第２の設定風量である場合における前記第２の回転数の方が小さい
    　請求項２に記載の空気調和装置の室内機。     An air volume setting unit for receiving the set air volume;
    The control device includes:
    The first rotation speed when the set air volume is a second set air volume smaller than the first set air volume than the first rotation speed when the set air volume is the first set air volume. Is smaller,
    The second rotation speed when the set air volume is the second set air volume is smaller than the second rotation speed when the set air volume is the first set air volume. The indoor unit of the air conditioning apparatus described.
  4. 　前記補正後回転数には、
    　複数の設定風量のうちの最小風量に対応する回転数よりも低い回転数が含まれる
    　請求項３に記載の空気調和装置の室内機。     In the corrected rotation speed,
    The indoor unit of the air conditioning apparatus according to claim 3, wherein a rotational speed lower than a rotational speed corresponding to a minimum air volume among the plurality of set air volumes is included.
  5. 　請求項１～４のいずれか一項に記載の空気調和装置の室内機と、
    　前記第１の熱交換器に接続され、前記第１の熱交換器から流出する冷媒を減圧する絞り装置と、
    　を備え、
    　前記制御装置は、
    　前記現在の設定回転数を前記補正後回転数へ低下させた場合には、前記絞り装置の開度を大きくするように構成されている
    　空気調和装置。     An indoor unit of the air conditioning apparatus according to any one of claims 1 to 4,
    A throttling device connected to the first heat exchanger and depressurizing a refrigerant flowing out of the first heat exchanger;
    With
    The control device includes:
    An air conditioner configured to increase the opening of the expansion device when the current set rotational speed is reduced to the corrected rotational speed.
  6. 　前記制御装置は、
    　前記現在の設定回転数を前記補正後回転数へ低下させるタイミングで、前記絞り装置の開度を大きくする
    　請求項５に記載の空気調和装置。     The control device includes:
    The air conditioner according to claim 5, wherein the opening degree of the expansion device is increased at a timing when the currently set rotational speed is reduced to the corrected rotational speed.
  7. 　圧縮機と、
    　前記暖房運転を実行しているときに蒸発器として機能する第２の熱交換器と、
    　をさらに備え、
    　前記室内機は、複数設けられ、
    　各室内機には、前記絞り装置が接続されている
    　請求項５又は６に記載の空気調和装置。     A compressor,
    A second heat exchanger that functions as an evaporator when performing the heating operation;
    Further comprising
    A plurality of the indoor units are provided,
    The air conditioner according to claim 5 or 6, wherein the throttle device is connected to each indoor unit.
PCT/JP2016/080907 2016-10-19 2016-10-19 Indoor unit of air conditioner and air conditioner WO2018073904A1 (en)

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JP2019215108A (en) * 2018-06-11 2019-12-19 ダイキン工業株式会社 Air conditioning system
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