CN112823262B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN112823262B CN112823262B CN201980066692.0A CN201980066692A CN112823262B CN 112823262 B CN112823262 B CN 112823262B CN 201980066692 A CN201980066692 A CN 201980066692A CN 112823262 B CN112823262 B CN 112823262B
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- heat exchanger
- indoor
- indoor heat
- humidified air
- supply device
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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
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0087—Indoor units, e.g. fan coil units with humidification means
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/22—Cleaning ducts or apparatus
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/54—Heating and cooling, simultaneously or alternatively
Abstract
An air conditioner includes: a Refrigerant Circuit (RC); an indoor unit (1) having a casing and an indoor fan (12); a humidified air supply device (3) which supplies humidified air into the housing; and a control device which controls the Refrigerant Circuit (RC) and the humidified air supply device (3), supplies humidified air from the humidified air supply device (3) into the casing, causes the indoor heat exchanger (11) to function as an evaporator, and performs a cleaning operation for cleaning the indoor heat exchanger (11). The control device controls the Refrigerant Circuit (RC) to limit the flow rate of the refrigerant flowing to the indoor heat exchanger (11) compared with the cleaning operation in a first period from the time when the information related to the cleaning operation is received to the time when a preset time elapses, or sets the evaporation temperature (Te) of the indoor heat exchanger (11) to be higher than that in the cleaning operation, and controls the Refrigerant Circuit (RC) and the humidified air supply device (3) to perform the cleaning operation after the first period.
Description
Technical Field
The present invention relates to an air conditioner.
Background
Conventionally, there is an air conditioner that performs a cleaning operation of condensing dew on a surface of an indoor heat exchanger and cleaning the surface of the indoor heat exchanger with the condensed water droplets (see, for example, patent No. 6296633 (patent document 1)). In the air conditioner, the indoor heat exchanger functions as an evaporator during a cleaning operation, and the evaporation temperature of the refrigerant in the indoor heat exchanger is set to be equal to or lower than the dew-point temperature.
Prior art documents
Patent document
Patent document 1: japanese patent No. 6296633
Disclosure of Invention
Problems to be solved by the invention
In the air conditioner, since the water droplets condensed on the indoor heat exchanger are generated by the water vapor contained in the indoor air, the amount of water droplets for cleaning the surface of the indoor heat exchanger is controlled by the amount of water contained in the indoor air, and there is a problem that a sufficient amount of water required for cleaning the indoor heat exchanger cannot be obtained.
To solve the above problems, the following air conditioner is proposed: by providing the humidified air supply device for supplying the humidified air into the indoor unit, a sufficient amount of water required for cleaning the indoor heat exchanger can be obtained.
However, in the air conditioner having the humidified air supply device, when the cleaning operation is started after the heating operation or the cooling operation is finished and the indoor heat exchanger is caused to function as the evaporator before the humidified air is supplied from the humidified air supply device, there is a problem that the casing is excessively cooled and the casing itself is condensed.
The present invention provides an air conditioner capable of suppressing dew condensation from occurring in a casing when an indoor heat exchanger is cleaned.
Means for solving the problems
The air conditioner of the invention comprises:
a refrigerant circuit in which a compressor, an outdoor heat exchanger, an expansion mechanism, and an indoor heat exchanger are connected in a ring shape;
an indoor unit having a casing in which the indoor heat exchanger is disposed in an air passage and an indoor fan disposed in the air passage of the casing;
a humidified air supply device which supplies humidified air into the casing; and
a control device that controls the refrigerant circuit and the humidified air supply device to perform a cleaning operation as follows: cleaning the indoor heat exchanger by supplying humidified air from the humidified air supply device into the casing and causing the indoor heat exchanger to function as an evaporator,
the control device controls the refrigerant circuit to limit a refrigerant flow rate flowing to the indoor heat exchanger as compared to that in the cleaning operation or to set an evaporation temperature of the indoor heat exchanger to be higher than that in the cleaning operation, in a first period from a time when the information on the start of the cleaning operation is received to a time when a predetermined time has elapsed,
the control device controls the refrigerant circuit and the humidified air supply device to perform the cleaning operation after the first period.
According to the present invention, the refrigerant circuit is controlled by the control device, and the flow rate of the refrigerant flowing to the indoor heat exchanger is limited as compared with the case of the cleaning operation or the evaporation temperature of the indoor heat exchanger is set higher than the case of the cleaning operation in the first period from the time when the information on the start of the cleaning operation is received (the end of the heating operation, the cooling operation, and the like) until the predetermined time elapses, so that the indoor heat exchanger can be made not to function as the evaporator or the capacity of the evaporator can be suppressed before the humidified air is supplied from the humidified air supply device in the first period before the start of the cleaning operation, and the casing does not become supercooled. Therefore, when the indoor heat exchanger is cleaned, dew condensation can be prevented from occurring in the casing.
In addition, in the air conditioner of one embodiment of the present disclosure,
a baffle plate is arranged at the blow-out port of the shell and is installed to be capable of inclining and moving in the vertical direction,
the control device controls the vertical tilting movement of the baffle plate, and in the first period, the baffle plate is directed upward from horizontal.
According to the present invention, the controller controls the vertical tilt movement of the damper, and the blown air is directed toward the ceiling side in the room by directing the damper upward from the horizontal direction in the first period, so that the blown air can be prevented from being directly blown to the user in the room.
In addition, in the air conditioner of one embodiment of the present disclosure,
the control device controls the indoor fan to drive the indoor fan at a predetermined rotation speed in the first period.
According to the present disclosure, the control device controls the indoor fan to drive the indoor fan at the predetermined rotation speed in the first period, thereby making it possible to mask a sound of the humidifying fan or the like transmitted from the humidified air supply device that is started to operate in advance.
In addition, in the air conditioner of one embodiment of the present disclosure,
the control device controls the amount of refrigerant flowing into the indoor heat exchanger and the number of rotations of the indoor fan so that the temperature of the indoor heat exchanger functioning as the evaporator is higher than 0 ℃ and equal to or lower than a dew point temperature during the cleaning operation.
According to the present invention, during the cleaning operation, the control device controls the amount of refrigerant flowing into the indoor heat exchanger and the rotation speed of the indoor fan so that the temperature of the indoor heat exchanger functioning as the evaporator is higher than 0 ℃ and equal to or lower than the dew point temperature, and the water vapor contained in the humidified air from the humidified air supply device does not freeze in the indoor heat exchanger and turns into water droplets.
In addition, in the air conditioner of one embodiment of the present disclosure,
the cleaning operation is performed without passing through the first period after a humidification operation in which the humidified air is supplied to the indoor unit by the humidified air supply device, or after a humidification/heating operation in which the humidified air is supplied to the indoor unit by the humidified air supply device and the indoor heat exchanger is caused to function as a condenser.
According to the present disclosure, in the cleaning operation after the humidification operation in which the humidified air is supplied to the indoor unit by the humidified air supply device is completed, the humidified air can be immediately supplied from the humidified air supply device, and therefore the cleaning operation can be immediately started without passing through the first period, and the time can be shortened. Similarly, in the cleaning operation after the humidification heating operation in which the humidified air is supplied to the indoor unit by the humidified air supply device and the indoor heat exchanger is caused to function as the condenser is completed, the humidified air can be immediately supplied from the humidified air supply device, and therefore the cleaning operation can be immediately started without passing through the first period, and the time can be shortened.
Drawings
Fig. 1 is an external view of an air conditioner according to a first embodiment of the present invention.
Fig. 2 is a circuit diagram of the air conditioner.
Fig. 3 is a schematic cross-sectional view of the indoor unit of fig. 1 taken along line III-III.
Fig. 4 is a control block diagram of the air conditioner.
Fig. 5 is a timing chart for explaining an operation of the air conditioner in the cleaning operation.
Detailed Description
Hereinafter, embodiments will be described. In the drawings, the same reference numerals are used to designate the same or corresponding parts. In addition, for the sake of clarity and simplification of the drawings, dimensions such as length, width, thickness, and depth on the drawings are changed from actual dimensions as appropriate, and do not show actual relative dimensions.
[ first embodiment ]
Fig. 1 is an external view of an air conditioner according to a first embodiment of the present invention.
As shown in fig. 1, the air conditioner of the first embodiment is a counter type air conditioner including an indoor unit 1 and an outdoor unit 2 connected to the indoor unit 1 via refrigerant pipes L4 and L5. In this air conditioner, a humidifier 3 connected to the indoor unit 1 through a humidifying hose 4 is provided in the outdoor unit 2. The humidifier 3 is an example of a humidified air supply device.
Fig. 2 is a circuit diagram of a refrigerant circuit RC included in the air conditioner.
< construction of indoor Unit 1 >
The indoor unit 1 of the air conditioner is, for example, a wall-mounted indoor unit mounted on an indoor wall surface. The indoor unit 1 includes a casing 10 (shown in fig. 3), an indoor heat exchanger 11, and an indoor fan 12 that sends air to the indoor heat exchanger 11.
The indoor heat exchanger 11 is located on the upstream side of the indoor fan 12 with respect to the air flow generated by the indoor fan 12. The indoor heat exchanger 11 includes a main heat exchange portion 11a, an auxiliary heat exchange portion 11b, and an electromagnetic valve 13 to exchange heat between air and refrigerant from the indoor fan 12.
Next, the main heat exchange portion 11a and the auxiliary heat exchange portion 11b will be described in detail with respect to the direction of refrigerant flow in the refrigeration cycle.
The main heat exchange unit 11a includes a front surface 11a-1 located on the indoor side and a rear surface 11a-2 located on the opposite side to the indoor side. The front surface portion 11a-1 is fluidly connected to the rear surface portion 11a-2 via refrigerant pipes L12 and L13 and the solenoid valve 13. Thus, the refrigerant flowing from the electric expansion valve 24 on the outdoor unit 2 side to the main heat exchange portion 11a can flow through the front portion 11a-1 and then flow into the rear portion 11 a-2.
The auxiliary heat exchange portion 11b is provided on the opposite side of the back surface portion 11a-2 side of the main heat exchange portion 11a with respect to the front surface portion 11a-1 of the main heat exchange portion 11 a. That is, the auxiliary heat exchanger 11b is located on the indoor side of the front surface portion 11a-1 of the main heat exchanger 11 a. The volume of the auxiliary heat exchange portion 11b is smaller than the volume of the main heat exchange portion 11 a. Further, a refrigerant pipe L4 is connected to one end of the auxiliary heat exchange portion 11b, and the front portion 11a-1 of the main heat exchange portion 11a is connected to the other end of the auxiliary heat exchange portion 11b via a refrigerant pipe L11. Thereby, the refrigerant from the electric expansion valve 24 side of the outdoor unit 2 is supplied to the main heat exchange unit 11a via the auxiliary heat exchange unit 11 b.
As the indoor fan 12, for example, a cross flow fan is used. The cross flow fan blows air whose temperature and the like have been adjusted by the indoor heat exchanger 11 into the room.
The electromagnetic valve 13 is provided in the middle of the refrigerant path of the indoor heat exchanger 11. More specifically, the electromagnetic valve 13 is a valve for setting a differential pressure between the front surface portion 11a-1 side of the main heat exchange portion 11a and the back surface portion 11a-2 side of the main heat exchange portion 11 a. The solenoid valve 13 is an on-off valve capable of obtaining only two positions of a large opening degree and a small opening degree, and is opened when necessary (for example, at the time of a reheating and dehumidifying operation described later), and is switched from the position of the large opening degree to the position of the small opening degree.
< construction of outdoor unit 2 >
The outdoor unit 2 of the air conditioner includes a compressor 21, a four-way switching valve 22, an outdoor heat exchanger 23, a motor-operated expansion valve 24 as an example of an expansion mechanism, an accumulator 25, and an outdoor fan 20 for sending air to the outdoor heat exchanger 23.
The outdoor heat exchanger 23 is located on the downstream side of the outdoor fan 20 with respect to the air flow of the outdoor fan 20. The refrigerant flowing through the outdoor heat exchanger 23 exchanges heat with air from the outdoor fan 20.
The expansion valve 24 is, for example, an electrically operated valve capable of being adjusted to three or more different opening degrees, and the opening degree thereof is changed in response to a signal from the control device 100 (shown in fig. 4).
< humidifying device 3>
As shown in fig. 2, the humidification device 3 includes a disk-shaped humidification rotor 41 provided with an adsorption region and a desorption region, a humidification rotor drive motor 42, a heater 43, a damper 44, a humidification fan 45, and an outdoor unit-side humidification duct 46 connected to the humidification hose 4.
The humidifying rotor 41 is formed by forming an adsorbent such as silica gel, zeolite, alumina, or the like into a honeycomb shape or a porous and granular shape. The humidifying rotor 41 is provided to be rotatable by a humidifying rotor drive motor 42.
Further, a first air passage P1 and a second air passage P2 for supplying humidified air are provided inside the humidifier 3.
The first air path P1 is disposed so that the air taken into the interior of the humidification device 3 by the outdoor fan 20 is discharged to the outside through the adsorption region of the humidification rotor 41. In the first air path P1, moisture is adsorbed in the sucked air when the air passes through the adsorption region of the humidification rotor 41, and the air is discharged to the outside in a dry state.
The second air path P2 is arranged such that the air taken into the humidification device 3 by the humidification fan 45 is heated by the heater 43, passes through the desorption region of the humidification rotor 41, and is supplied to the indoor unit 1 via the outdoor-unit-side humidification duct 46. In the second air path P2, when the air sucked into the humidification device 3 passes through the desorption region of the humidification rotor 41, the humidity of the air is increased by the moisture absorbed in the adsorption region, and the air is supplied to the indoor unit 1 in a humidified state.
< Structure of refrigerant Circuit RC >
The refrigerant circuit RC of the air conditioner includes the indoor heat exchanger 11, the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the motor-operated expansion valve 24, the accumulator 25, and the refrigerant pipes L1 to L7. More specifically, the indoor heat exchanger 11, the compressor 21, the four-way switching valve 22, the outdoor heat exchanger 23, the motor-operated expansion valve 24, and the accumulator 25 are fluidly connected by refrigerant pipes L1 to L7. Thereby, the annular refrigerant circuit RC is configured. In the refrigerant circuit RC, the refrigerant circulates when the compressor 21 is driven.
Although not shown, the air conditioner includes a remote control device (hereinafter, referred to as a "remote controller"). The user can start or stop the automatic operation, the cooling operation, the heating operation, the dehumidifying operation, and the like by operating the remote controller.
Fig. 3 is a schematic cross-sectional view of the indoor unit 1 as viewed from the line III-III in fig. 1.
As shown in fig. 3, in the indoor unit 1, an indoor heat exchanger 11 is disposed in an air passage Pw of the casing 10. Further, an indoor fan 12 is disposed in the air passage Pw of the casing 10 and on the downstream side of the indoor heat exchanger 11. A horizontal baffle 31 that can tilt and move in the vertical direction is provided at the air outlet 1a of the air passage Pw of the casing 10. The horizontal baffle 31 is an example of a baffle. The wind passage Pw of the casing 10 is a passage of the air flow indicated by the thick solid arrow shown in fig. 3.
Further, an indoor-side humidification duct 51 and a diffusion duct 52 connected to the humidification hose 4 (as shown in fig. 2) are disposed in the air passage Pw of the casing 10 and on the upstream side of the indoor heat exchanger 11. The diffusion duct 52 is connected to the indoor unit side humidification duct 51 and extends in the left-right direction in the casing 10 (see fig. 1). A plurality of humidification air outlets (not shown) are formed in the rear wall of the diffuser duct 52 so as to be aligned in the left-right direction. The humidified air flowing into the diffuser duct 52 from the indoor-unit-side humidification duct 51 is blown out toward the indoor heat exchanger 11 from the plurality of humidification air outlets.
Fig. 4 is a control block diagram of the air conditioner.
As shown in fig. 4, the indoor unit 1 includes: an indoor heat exchanger temperature sensor T4 that detects the temperature of the indoor heat exchanger 11; an indoor temperature sensor T5 that detects the indoor temperature at which the indoor unit 1 is installed; and a humidity sensor H that detects the humidity in the room where the indoor unit 1 is installed.
As shown in fig. 4, the outdoor unit 2 includes: an outdoor heat exchanger temperature sensor T1 that detects the temperature of the outdoor heat exchanger 23; an outside air temperature sensor T2 that detects an outside air temperature; and an evaporation temperature sensor T3 that detects the evaporation temperature of the motor-operated expansion valve 24.
As shown in fig. 4, the air conditioner includes a controller 100 for controlling the indoor unit 1 and the outdoor unit 2, and a remote controller (not shown).
The control device 100 is composed of an indoor control Unit (not shown) on the indoor Unit 1 side and an outdoor control Unit (not shown) on the outdoor Unit 2 side, and includes a CPU (Central Processing Unit) for performing calculations and the like, a ROM (Read Only Memory) and a RAM (Random Access Memory) in which programs and data and the like necessary for controlling the indoor Unit 1 and the outdoor Unit 2 are stored in advance, and the like. The control device 100 controls the compressor 21, the four-way switching valve 22, the electric expansion valve 24, the outdoor fan 20, the indoor fan 12, the solenoid valve 13, the display unit 30, the horizontal flap drive motor 32, the humidification rotor drive motor 42, the heater 43, the damper 44, and the humidification fan 45 based on signals from a remote controller or sensors (an outdoor heat exchanger temperature sensor T1, an outside air temperature sensor T2, an evaporation temperature sensor T3, an indoor heat exchanger temperature sensor T4, an indoor temperature sensor T5, and a humidity sensor H) of the indoor unit 1 and the outdoor unit 2.
The remote controller can change the control contents of the indoor unit 1 and the outdoor unit 2 by the control device 100. For example, the operation mode selection, the operation start, the operation switching, or the operation stop of the heating operation, the cooling operation, and the dehumidifying operation, or the operation start or the operation stop of setting or changing the indoor temperature or the air volume, or performing the cleaning operation are performed by operating the remote controller.
Fig. 5 is a timing chart for explaining the operation of the cleaning operation. In this cleaning operation, for example, the end of the heating operation is assumed as information related to the start of the cleaning operation. The control device 100 receives the information on the start of the cleaning operation when the cleaning operation is started by the remote controller or when the cleaning operation is set to be executed after the air-conditioning operation such as the heating operation or the cooling operation is finished by the remote controller operation of the user and the air-conditioning operation is finished.
In fig. 5, the execution of the cleaning operation is set by the operation of the remote controller after the air conditioning operation such as the heating operation or the cooling operation is finished.
First, when the heating operation is stopped, the compressor 21 is stopped without being operated until a predetermined time T (20 minutes in this embodiment) elapses (first period), and the flow rate of the refrigerant flowing through the indoor heat exchanger 11 is restricted without flowing the refrigerant through the refrigerant circuit RC.
Further, the operation of the humidifier 3 is started at the start time of the preparation period. Specifically, the control device 100 controls the humidifying rotor drive motor 42, the heater 43, and the humidifying fan 45 to rotate the humidifying rotor 41 of the humidifying device 3, and turns on the heater 43 and the humidifying fan 45 to prepare for supplying humidified air to the indoor unit 1 through the humidifying hose 4.
In the preparation period and the cleaning operation, the indoor fan 12 is driven at a predetermined rotation speed. The predetermined rotation speed of the indoor fan 12 is a rotation speed at which the sound of the humidifying fan transmitted from the humidifying device 3 can be shielded.
In the preparation period and the cleaning operation, the horizontal flap 31 is opened to a predetermined opening degree, and the wind direction of the blown air of the horizontal flap 31 is directed upward from the horizontal direction.
When the preparation period ends and the cleaning operation is started, the compressor 21 starts operating and the indoor heat exchanger 11 functions as an evaporator in the refrigeration cycle. When the temperature of the indoor heat exchanger 11 is higher than 0 ℃ and equal to or lower than the dew point temperature, water droplets start to adhere to the indoor heat exchanger 11.
In the air conditioner having the above-described configuration, the control device 100 controls the refrigerant circuit RC to restrict the flow rate of the refrigerant flowing through the indoor heat exchanger 11 during a preparation period (first period) from the time when the information on the start of the washing operation is received until a predetermined time T (20 minutes in the present embodiment) elapses. During this preparation period, the control device 100 controls the drive motor 42 for the humidification rotor, the heater 43, and the humidification fan 45 to rotate the humidification rotor 41 of the humidification device 3, and activates the heater 43 and the humidification fan 45 to prepare for supplying humidified air to the indoor unit 1 through the humidification hose 4.
In addition, the humidification rotor 41 of the humidification device 3 is rotated during the preparation period, and only the adsorption operation for adsorbing moisture in the adsorption region of the humidification rotor 41 is performed, and the humidification air can be actually introduced from the humidification device 3 to the indoor unit 1 after the start of the cleaning operation.
Thus, when the cleaning operation is started after the heating operation or the cooling operation is finished, the indoor heat exchanger 11 can be prevented from functioning as an evaporator and the casing 10 can be prevented from being supercooled substantially before the humidified air is supplied from the humidifier 3 (humidified air supply device). Therefore, when the indoor heat exchanger 11 is cleaned, dew condensation can be prevented from occurring in the casing 10.
Further, by controlling the tilt movement of the horizontal flap 31 (flap) in the vertical direction by the control device 100 and by causing the horizontal flap 31 to face upward from the horizontal direction during the preparation period, the blown air can be directed toward the ceiling side in the room, and the blown air can be prevented from being directly blown to the user in the room.
Further, by controlling the indoor fan 12 by the control device 100, the indoor fan 12 is driven at a predetermined rotational speed during the preparation period, and the sound or the like transmitted from the humidifier 3, which is started to operate in advance, to the indoor humidifying fan via the humidifying hose 4 and the indoor unit 1 can be masked.
In the cleaning operation, the amount of refrigerant flowing through the indoor heat exchanger 11 and the number of rotations of the indoor fan 12 are controlled by the control device 100 so that the temperature of the indoor heat exchanger 11 functioning as an evaporator is higher than 0 ℃ and equal to or lower than the dew point temperature, whereby the indoor heat exchanger 11 can be kept from freezing, and the water vapor contained in the humidified air from the humidifying device 3 can be turned into water droplets in the indoor heat exchanger 11 to cause condensation.
[ second embodiment ]
An air conditioner according to a second embodiment of the present disclosure has the same configuration as the air conditioner according to the first embodiment except for the operation of the control device 100, and fig. 1 to 4 are referred to.
In the air conditioner of the second embodiment, the control device 100 performs the cleaning operation without passing through the preparation period after the humidification operation in which the humidification device 3 (the humidified air supply device) supplies humidified air to the indoor unit 1 or after the humidification/heating operation in which the humidification device 3 supplies humidified air to the indoor unit 1 and the indoor heat exchanger 11 functions as a condenser.
According to the air conditioner having the above configuration, in the cleaning operation after the humidification operation for supplying the humidified air to the indoor unit 1 by the humidification device 3 is completed, the humidified air can be immediately supplied from the humidification device 3, and therefore the cleaning operation can be immediately started without passing through the preparation period, and the time can be shortened.
Similarly, in the cleaning operation after the humidification and heating operation in which the humidification air is supplied to the indoor unit 1 by the humidification device 3 and the indoor heat exchanger 11 functions as a condenser is completed, the humidification air can be immediately supplied from the humidification device 3, and therefore the cleaning operation can be immediately started without passing through the preparation period, and the time can be shortened.
The air conditioner of the second embodiment has the same effects as the air conditioner of the first embodiment.
[ third embodiment ]
An air conditioner according to a third embodiment of the present disclosure has the same configuration as the air conditioner according to the first embodiment except for the operation of the control device 100, and fig. 1 to 4 are referred to.
In the air conditioner of the first embodiment, when the air conditioning operation such as the heating operation or the cooling operation is stopped, the operation of the compressor 21 is stopped so that the refrigerant does not flow in the refrigerant circuit RC during the preparation period (first period), whereas in the air conditioner of the third embodiment, the operation of the compressor 21 is performed during the preparation period (first period) so that the indoor heat exchanger 11 functions as an evaporator in the refrigeration cycle. At this time, the refrigerant flow rate to the indoor heat exchanger 11 is limited to such an extent that a smaller amount of refrigerant flows to the indoor heat exchanger 11 than in the subsequent cleaning operation, and the evaporation temperature Te of the indoor heat exchanger 11 detected by the indoor heat exchanger temperature sensor T4 is set higher than in the cleaning operation.
In the preparation period (first period) before the start of the cleaning operation, the capacity of the indoor heat exchanger 11 as an evaporator can be suppressed before the humidified air is supplied from the humidifier 3 (humidified air supply device), and the casing 10 is not excessively cooled. Therefore, when the indoor heat exchanger 11 is cleaned, dew condensation can be prevented from occurring in the casing 10.
The air conditioner of the third embodiment has the same effects as the air conditioner of the first embodiment.
In the first to third embodiments, the air conditioner having the humidifying device 3 as the humidified air supply device was described, but the humidified air supply device is not limited to this, and may be a humidified air supply device that is provided in an indoor unit and supplies water for humidification from a tank or the like.
Although the specific embodiments of the present disclosure have been described, the present disclosure is not limited to the third embodiment, but may be implemented with various modifications within the scope of the present disclosure.
Description of the reference symbols
1: an indoor unit; 2: an outdoor unit; 3: a humidifying device; 4: a humidifying hose; 10: a housing; 11: an indoor heat exchanger; 11 a: a main body heat exchange portion; 11 a-1: a front face portion; 11 a-2: a back portion; 11 b: an auxiliary heat exchange unit; 12: an indoor fan; 13: an electromagnetic valve; 20: an outdoor fan; 21: a compressor; 22: a four-way switching valve; 23: an outdoor heat exchanger; 24: an electric expansion valve (expansion mechanism); 25: a reservoir; 31: a horizontal baffle; 32: a drive motor for the horizontal baffle; 41: a humidifying rotor; 42: a drive motor for the humidifying rotor; 43: a heater; 44: a damper; 45: a humidifying fan; 46: a humidifying pipeline at the outdoor unit side; RC: a refrigerant circuit.
Claims (5)
1. An air conditioner is characterized in that the air conditioner comprises:
a Refrigerant Circuit (RC) in which a compressor (21), an outdoor heat exchanger (23), an expansion mechanism (24), and an indoor heat exchanger (11) are connected in a ring shape;
an indoor unit (1) having a casing (10) and an indoor fan (12), wherein the casing (10) is provided with the indoor heat exchanger (11) in an air passage (Pw), and the indoor fan (12) is provided in the air passage (Pw) of the casing (10);
a humidified air supply device (3) which supplies humidified air into the casing (10); and
a control device (100) that controls the Refrigerant Circuit (RC) and the humidified air supply device (3) to perform a cleaning operation as follows: cleaning the indoor heat exchanger (11) by supplying humidified air from the humidified air supply device (3) into the casing (10) and causing the indoor heat exchanger (11) to function as an evaporator,
the control device (100) controls the Refrigerant Circuit (RC) to operate the humidified air supply device (3) and restrict the flow rate of the refrigerant flowing to the indoor heat exchanger (11) as compared with the time of the purge operation or set the evaporation temperature (Te) of the indoor heat exchanger (11) higher than the time of the purge operation during a first period from the time when the information on the start of the purge operation is received to the elapse of a predetermined time,
the control device (100) controls the Refrigerant Circuit (RC) and the humidified air supply device (3) to perform the purge operation after the first period.
2. The air conditioner according to claim 1,
a baffle plate (31) is arranged at the blow-out port (1a) of the shell (10), the baffle plate (31) is installed to be capable of inclining and moving in the vertical direction,
the control device (100) controls the vertical tilting movement of the baffle plate (31) and, in the first period, causes the baffle plate (31) to be oriented horizontally upward.
3. The air conditioner according to claim 2,
the control device (100) controls the indoor fan (12) and drives the indoor fan (12) at a predetermined rotational speed during the first period.
4. An air conditioner according to any one of claims 1 to 3,
the control device (100) controls the amount of refrigerant flowing into the indoor heat exchanger (11) and the number of rotations of the indoor fan (12) so that the temperature of the indoor heat exchanger (11) functioning as the evaporator is higher than 0 ℃ and equal to or lower than the dew point temperature during the cleaning operation.
5. An air conditioner according to any one of claims 1 to 4,
the cleaning operation is performed without passing through the first period after a humidification operation in which the humidified air is supplied to the indoor unit (1) by the humidified air supply device (3), or after a humidification/heating operation in which the humidified air is supplied to the indoor unit (1) by the humidified air supply device (3) and the indoor heat exchanger (11) functions as a condenser.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-213540 | 2018-11-14 | ||
| JP2018213540A JP6743869B2 (en) | 2018-11-14 | 2018-11-14 | Air conditioner |
| PCT/JP2019/035601 WO2020100395A1 (en) | 2018-11-14 | 2019-09-11 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112823262A CN112823262A (en) | 2021-05-18 |
| CN112823262B true CN112823262B (en) | 2021-08-31 |
Family
ID=70731119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980066692.0A Active CN112823262B (en) | 2018-11-14 | 2019-09-11 | Air conditioner |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3862642A4 (en) |
| JP (1) | JP6743869B2 (en) |
| CN (1) | CN112823262B (en) |
| WO (1) | WO2020100395A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114076389B (en) * | 2020-08-11 | 2023-06-02 | 海信空调有限公司 | Air conditioner and self-cleaning method |
| JP6963199B1 (en) * | 2020-08-26 | 2021-11-05 | ダイキン工業株式会社 | Indoor air conditioning system |
| JP7082299B2 (en) * | 2020-09-10 | 2022-06-08 | ダイキン工業株式会社 | Air conditioner |
| CN113357789B (en) * | 2021-05-20 | 2022-10-28 | 青岛海尔空调器有限总公司 | Control method and device for self-cleaning of air conditioner and air conditioner |
| CN117501053A (en) * | 2021-06-23 | 2024-02-02 | 大金工业株式会社 | Air conditioning device |
| CN114234351A (en) * | 2021-11-29 | 2022-03-25 | 青岛海尔空调器有限总公司 | Method and device for cleaning fan in air conditioner, air conditioner and readable storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009300030A (en) * | 2008-06-16 | 2009-12-24 | Daikin Ind Ltd | Air conditioner |
| JP2010007999A (en) * | 2008-06-27 | 2010-01-14 | Daikin Ind Ltd | Air conditioner |
| CN102410582A (en) * | 2011-11-07 | 2012-04-11 | 太仓新凯裕电子科技有限公司 | Air conditioning system |
| CN107525216A (en) * | 2017-07-26 | 2017-12-29 | 青岛海尔空调器有限总公司 | Air conditioner and its control method with self-cleaning function |
| JP6296633B1 (en) * | 2017-04-28 | 2018-03-20 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| WO2018198397A1 (en) * | 2017-04-28 | 2018-11-01 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105299949A (en) * | 2015-12-01 | 2016-02-03 | 李丹 | Method and device for regulating evaporating temperature of refrigerating system to clean heat exchanger through condensate water |
-
2018
- 2018-11-14 JP JP2018213540A patent/JP6743869B2/en active Active
-
2019
- 2019-09-11 WO PCT/JP2019/035601 patent/WO2020100395A1/en unknown
- 2019-09-11 CN CN201980066692.0A patent/CN112823262B/en active Active
- 2019-09-11 EP EP19883559.7A patent/EP3862642A4/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009300030A (en) * | 2008-06-16 | 2009-12-24 | Daikin Ind Ltd | Air conditioner |
| JP2010007999A (en) * | 2008-06-27 | 2010-01-14 | Daikin Ind Ltd | Air conditioner |
| CN102410582A (en) * | 2011-11-07 | 2012-04-11 | 太仓新凯裕电子科技有限公司 | Air conditioning system |
| JP6296633B1 (en) * | 2017-04-28 | 2018-03-20 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| WO2018198397A1 (en) * | 2017-04-28 | 2018-11-01 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN107525216A (en) * | 2017-07-26 | 2017-12-29 | 青岛海尔空调器有限总公司 | Air conditioner and its control method with self-cleaning function |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020100395A1 (en) | 2020-05-22 |
| JP6743869B2 (en) | 2020-08-19 |
| CN112823262A (en) | 2021-05-18 |
| EP3862642A1 (en) | 2021-08-11 |
| JP2020079684A (en) | 2020-05-28 |
| EP3862642A4 (en) | 2021-12-01 |
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