CN108050585B - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
- Publication number
- CN108050585B CN108050585B CN201711008361.0A CN201711008361A CN108050585B CN 108050585 B CN108050585 B CN 108050585B CN 201711008361 A CN201711008361 A CN 201711008361A CN 108050585 B CN108050585 B CN 108050585B
- Authority
- CN
- China
- Prior art keywords
- temperature
- section
- indoor unit
- heat exchanger
- flow fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner and a control method thereof. The control method is suitable for the air conditioner with two cross-flow fans and can be used for preventing the surface of the heat exchanger of the indoor unit from frosting. Since the open and close states of two cross flow fans of the air conditioner may be different, the temperatures of the first section and the second section of the heat exchanger of the indoor unit may have a certain difference. The air conditioner control method firstly determines whether the temperature difference exists between the two heat exchanger sections according to the opening and closing states of the two cross-flow fans, and then determines the temperature threshold value when the air conditioner enters an anti-freezing protection mode (namely, a compressor is stopped) according to the temperature difference. The method of the invention enables the air conditioner to enter the anti-freezing protection mode in time, can effectively prevent the surface of the second section of the heat exchanger of the indoor unit from frosting, and protects the normal operation of the air conditioner.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
When the air conditioner refrigerates, the refrigerant passes through the compressor, the condenser and the evaporator in sequence. The evaporator is in a low-temperature state for a long time, so that condensed water is easy to frost or even freeze on the surface of the evaporator. If measures are not taken in time, frost or ice is thicker and thicker, the air conditioner has no refrigerating capacity, the use of the air conditioner and the experience of users are seriously influenced, and the operation reliability of a compressor unit is also influenced. Therefore, how to reasonably and timely protect the air conditioner from freezing is a main subject of research in the field of air conditioners.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide an air conditioner and a control method thereof that overcome or at least partially solve the above problems.
A further object of the present invention is to prevent the frost formation of the heat exchanger of the indoor unit.
Another further object of the present invention is to improve the operational reliability of the air conditioner.
According to one aspect of the present invention, the present invention provides a control method of an air conditioner, an interior of an indoor unit of the air conditioner includes a first section and a second section divided along a transverse direction of the indoor unit, a first crossflow fan and a second crossflow fan are respectively disposed inside the first section and the second section, an indoor unit heat exchanger extends along the transverse direction of the indoor unit and includes a first section located in the first section and a second section located in the second section, and a temperature detection device for detecting a temperature of the first section of the indoor unit heat exchanger is further disposed in the first section, the control method includes: in the process of air-conditioning refrigeration, the opening and closing states of two cross-flow fans are obtained; continuously detecting the temperature of a first section of a heat exchanger of the indoor unit by using a temperature detection device; and determining the running mode of the compressor of the air conditioner according to the opening and closing state of the cross-flow fan and the temperature of the first section of the heat exchanger of the indoor unit.
Optionally, the step of determining an operation mode of a compressor of the air conditioner according to the open/close state of the cross flow fan and the temperature of the first section of the heat exchanger of the indoor unit comprises: judging whether the first cross flow fan is in an opening state or not, and judging whether the second cross flow fan is in a closing state or not; if so, judging whether the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to a first preset temperature; if so, controlling the compressor to stop; if not, detecting the rotating speed of the first through-flow fan, and determining the operation mode of a compressor of the air conditioner according to the temperature of the first section of the heat exchanger of the indoor unit and the rotating speed of the first through-flow fan; if not, judging whether the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to a second preset temperature or not; if so, controlling the compressor to stop; wherein the first preset temperature is greater than the second preset temperature.
Optionally, the step of determining the operation mode of the compressor of the air conditioner according to the temperature of the first section of the indoor unit heat exchanger and the rotating speed of the first through-flow fan comprises: judging whether the temperature of the first section of the heat exchanger of the indoor unit is lower than a third preset temperature or not; if so, judging whether the rotating speed of the first through-flow fan is greater than a preset rotating speed or not; if so, controlling the compressor to reduce the frequency according to a preset speed; if not, keeping the running frequency of the compressor unchanged; wherein the third predetermined temperature is greater than the first predetermined temperature.
Optionally, the step of controlling the compressor after the shutdown further comprises: and controlling the first cross-flow fan and/or the second cross-flow fan to operate at a rotating speed lower than the preset rotating speed.
Optionally, the step of controlling the compressor after the shutdown further comprises: and when the temperature of the first section of the heat exchanger of the indoor unit is detected to be higher than a first preset temperature or a second preset temperature, controlling the compressor to restart.
According to another aspect of the present invention, there is also provided an air conditioner including: indoor set, indoor set inside including along the first interval and the second interval of indoor set horizontal division, indoor set includes: the first through flow fan is arranged in the first interval; the second cross-flow fan is arranged in the second interval; the indoor unit heat exchanger is arranged in the indoor unit, extends along the transverse direction of the indoor unit and comprises a first section positioned in a first interval and a second section positioned in a second interval; the temperature detection device is arranged in the first interval and used for detecting the temperature of the first section of the heat exchanger of the indoor unit; a compressor configured to compress a refrigerant for refrigeration; a state acquiring device configured to acquire the open and closed states of the two cross-flow fans; and the control device is electrically connected with the temperature detection device and the state acquisition device and is configured to determine the operation mode of the compressor according to the opening and closing state of the cross-flow fan and the temperature of the first section of the heat exchanger of the indoor unit.
Optionally, the air conditioner further includes: a rotation speed detection device configured to detect a rotation speed of the first through-flow fan; the control device is also configured to control the compressor to stop when the first cross flow fan is in an opening state, the second cross flow fan is in a closing state, and the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to a first preset temperature; under the conditions that the first cross flow fan is in an opening state, the second cross flow fan is in a closing state and the temperature of the first section of the heat exchanger of the indoor unit is higher than a first preset temperature, determining the operation mode of a compressor of the air conditioner according to the temperature of the heat exchanger of the indoor unit and the rotating speed of the first cross flow fan; and controlling the compressor to stop when the first cross flow fan is in a closed state or the second cross flow fan is in an open state and the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to a second preset temperature.
Optionally, the control device is further configured to: controlling a compressor to reduce the frequency according to a preset speed under the condition that the temperature of a first section of a heat exchanger of the indoor unit is lower than a third preset temperature and the rotating speed of a first through-flow fan is higher than the preset rotating speed; under the condition that the temperature of the first section of the heat exchanger of the indoor unit is lower than a third preset temperature and the rotating speed of the first through-flow fan is less than or equal to a preset rotating speed, keeping the operating frequency of the compressor unchanged; wherein the third predetermined temperature is greater than the first predetermined temperature.
Optionally, the control device is further configured to: and after the compressor is controlled to stop, controlling the first cross-flow fan and/or the second cross-flow fan to operate at a rotating speed lower than the preset rotating speed.
Optionally, the control device is further configured to: and after the compressor is controlled to stop, when the temperature of the first section of the heat exchanger of the indoor unit is higher than a first preset temperature or a second preset temperature, the compressor is controlled to restart.
The invention provides a control method of an air conditioner, which is suitable for the air conditioner with two cross-flow fans and is used for preventing the surface of a heat exchanger of an indoor unit from frosting. Since the open and close states of two cross flow fans of the air conditioner may be different, the temperatures of the first section and the second section of the heat exchanger of the indoor unit may have a certain difference. The air conditioner control method firstly determines whether the temperature difference exists between the two heat exchanger sections according to the opening and closing states of the two cross-flow fans, and then determines the temperature threshold value when the air conditioner enters an anti-freezing protection mode (namely, a compressor is stopped) according to the temperature difference. The method of the invention ensures that the temperature starting point of the air conditioner entering the anti-freezing protection mode is more reasonable, and can effectively prevent the surface of the second section of the heat exchanger of the indoor unit from frosting in time.
Furthermore, the temperature difference value of the first section and the second section of the heat exchanger of the indoor unit is related to the wind speed of the first through-flow fan. When the first through-flow fan runs at a high wind speed, the heat exchange efficiency of the first section of the heat exchanger of the indoor unit is high, and the temperature difference between the first section and the second section is possibly large. When the temperature of the first section of the heat exchanger of the indoor unit is detected to be between the first preset temperature and the third preset temperature, and the first through-flow fan runs at a high wind speed, the temperature of the second section of the heat exchanger may already be close to the anti-freezing protection temperature. The control device controls the compressor to reduce the frequency according to the preset speed so as to gradually reduce the refrigerating capacity of the air conditioner, and can prevent the temperature of the second section of the heat exchanger of the indoor unit from continuously falling below the anti-freezing protection temperature. When the temperature of the first section of the heat exchanger of the indoor unit is detected to be between the first preset temperature and the third preset temperature and the first through-flow fan runs at a low wind speed, the temperature of the second section has a certain difference from the anti-freezing protection temperature. And controlling the compressor to keep the current running frequency unchanged, and stopping the continuous increase of the frequency of the compressor to prevent the continuous decrease of the temperature of the second section of the heat exchanger of the indoor unit. According to the method, when the first section of the heat exchanger of the indoor unit is detected to be in a lower temperature range and not reach the anti-freezing protection temperature, the running frequency of the compressor is adjusted to ensure that the air conditioner can continue to work and refrigerate, the compressor does not need to be forced to stop, the running reliability of the air conditioner is improved, and the user experience is improved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic view of an air conditioner according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic view of a control method of an air conditioner according to an embodiment of the present invention;
fig. 5 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
The present embodiment first provides an air conditioner including: a cooling/heating cycle system comprising a compressor 100, an indoor heat exchanger 300, and an outdoor heat exchanger 200. In air-conditioning cooling, a refrigerant passes through the compressor 100, the outdoor heat exchanger 300, and the indoor heat exchanger 200 in this order. The indoor heat exchanger 300 is in a low temperature state for a long time, and thus is easily frosted.
The indoor unit includes: the air conditioner comprises a shell, a first cross flow fan 310, a second cross flow fan 320, two air outlets 330, an indoor unit heat exchanger 300 and a temperature detection device 410. The indoor unit comprises a first section and a second section which are divided along the transverse direction of the indoor unit. The first through-flow fan 310 is disposed inside the first section; the second cross flow fan 320 is disposed in a second section, that is, two cross flow fans are disposed on the left and right sides of the indoor unit, and the first section may represent a left space or a right space of the indoor unit. The two air outlets 330 are disposed at the bottom of the front side of the indoor unit casing, and the two air outlets 330 respectively correspond to the first cross flow fan 310 and the second cross flow fan 320 in the transverse direction of the indoor unit, so as to allow the first cross flow fan 310 and the second cross flow fan 320 to be blown by the air outlets 330 respectively corresponding to the air outlets.
In this embodiment, preferably, the two cross-flow fans are equal in size and model, and are coaxially arranged. The two cross-flow fans can be simultaneously started to supply air to the whole indoor space area, and one of the cross-flow fans can also be independently started to realize that the indoor unit of the air conditioner only supplies air to the left area or the right area of the room.
The indoor unit heat exchanger 300 is disposed inside the indoor unit and extends in a lateral direction of the indoor unit. The top of the indoor unit casing is also provided with an air inlet 340 extending along the transverse direction of the indoor unit, and the indoor unit heat exchanger 300 is arranged in the area between the two cross-flow fans and the air inlet 340. The indoor heat exchanger 300 extends over the entire lateral extent of the indoor unit, the indoor heat exchanger 300 comprising a first section located within a first interval and a second section located within a second interval.
The temperature detecting device 410 is disposed on a surface of the first section of the indoor unit heat exchanger 300, and is configured to detect a temperature of the indoor unit heat exchanger 300. In this embodiment, the temperature detecting device 410 is disposed at a position inside the first region near the lateral end of the housing, and the position is closer to the air-conditioning computer board, so that the circuit is convenient to connect with the wiring. Therefore, the data detected by the temperature detecting device 410 is the temperature value of the first section of the heat exchanger of the indoor unit.
The above air conditioner further includes: a state acquisition device 420 and a control device 500. The state acquiring means 420 is configured to acquire the open/close states of the two cross flow fans. The control means 500 is electrically connected to the temperature detecting means 410 and the state acquiring means 420, and is configured to determine the operation mode of the compressor 100 according to the open/close state of the cross flow fan and the temperature of the indoor unit heat exchanger 300. In this embodiment, the state acquiring device 420 is connected to the motors of the two cross-flow fans, and determines the operating states of the two cross-flow fans by detecting the power-on states of the two motors. The control device 500 may be a computer board of an air conditioner.
The open and close state of the cross flow fan affects the temperature of the indoor unit heat exchanger 300. When a certain cross flow fan is started, the heat exchange efficiency between the heat exchanger section corresponding to the cross flow fan and ambient air is high, and the temperature of the heat exchanger section is high during air conditioning refrigeration. Conversely, when a certain cross-flow fan is closed, the heat exchanger section corresponding to the cross-flow fan has low heat exchange efficiency with the ambient air, and the temperature of the heat exchanger section is low during air conditioning and refrigeration. The air conditioning control apparatus 500 of the present embodiment first determines whether there is a temperature difference between the two heat exchanger sections according to the open and closed states of the two cross flow fans, and then determines the operation mode of the compressor 100 according to the temperature of the first section.
The above air conditioner further includes: and a rotational speed detection device 430. The rotation speed detecting device 430 is electrically connected to the first convection fan 310 and configured to detect the rotation speed of the first convection fan 310. In the present embodiment, the cross-flow fan has two wind speed stages, a high wind speed stage and a low wind speed stage. When the cross flow fan runs at a high speed, the rotating speed of the cross flow fan is higher than the preset rotating speed; when the cross-flow fan runs at a low gear, the rotating speed of the cross-flow fan is lower than the preset rotating speed.
The control device 500 is further configured to control the compressor 100 to stop when the first crossflow fan 310 is in an on state, the second crossflow fan 320 is in an off state, and the temperature of the first section of the indoor unit heat exchanger is lower than or equal to a first preset temperature; and under the conditions that the first cross flow fan 310 is in an open state, the second cross flow fan 320 is in a closed state, and the temperature of the first section of the indoor unit heat exchanger is higher than a first preset temperature, determining the operation mode of the compressor 100 of the air conditioner according to the temperature of the indoor unit heat exchanger 300 and the rotating speed of the first cross flow fan 310. The control device 500 is further configured to control the compressor 100 to stop when the first crossflow fan 310 is in the off state or the second crossflow fan 320 is in the on state, and the temperature of the indoor unit heat exchanger 300 is lower than or equal to a second preset temperature. The first preset temperature may be 2 deg.c and the second preset temperature may be 0 deg.c.
When the air conditioner is used for refrigeration, if the surface temperature of the indoor unit heat exchanger 300 is lower than 0 ℃, frost is easy to form. Therefore, the general air-conditioning computer board is preset with an anti-freezing protection temperature (generally 0 ℃), and when the temperature of the heat exchanger is detected to be lower than the temperature, the compressor 100 can be controlled to stop, and refrigeration can be suspended to prevent the heat exchanger 300 of the indoor unit from frosting. However, for the air conditioner having the dual cross-flow fans, the temperatures of the two sections of the indoor unit heat exchanger 300 are different, especially when the two cross-flow fans are not simultaneously turned on. In the present embodiment, the air conditioner sets different compressor 100 shutdown thresholds according to the opening and closing conditions of the two cross flow fans. Specifically, when the first crossflow fan 310 is in the on state and the second crossflow fan 320 is in the off state, the temperature of the first section of the indoor unit heat exchanger 300 is higher than that of the second section, that is, the temperature of the second section of the heat exchanger is lower than the temperature detected by the temperature detecting device 410. Setting a higher compressor 100 shutdown threshold (i.e., the first predetermined temperature value) under the above conditions prevents the heat exchanger second section temperature from dropping below 0 ℃.
The control device 500 is further configured to: controlling the compressor 100 to reduce the frequency according to a preset speed under the condition that the temperature of the first section of the indoor unit heat exchanger is lower than a third preset temperature and the rotating speed of the first through-flow fan 310 is higher than the preset rotating speed; and keeping the operation frequency of the compressor 100 unchanged under the condition that the temperature of the first section of the indoor unit heat exchanger is lower than the third preset temperature and the rotating speed of the first through-flow fan 310 is less than or equal to the preset rotating speed. Wherein the third preset temperature is greater than the first preset temperature, and in this embodiment, the third preset temperature may be set to be 5 ℃. The temperature difference between the first section and the second section of the indoor unit heat exchanger 300 is related to the wind speed of the first through-flow fan 310. When the first cross flow fan 310 operates at a high wind speed, the heat exchange efficiency of the first section of the indoor unit heat exchanger is high, and the temperature difference between the first section and the second section may be large. When the temperature of the first section of the heat exchanger of the indoor unit is detected to be between the first preset temperature and the third preset temperature, and the first through-flow fan 310 is operated at a high wind speed, the temperature of the second section of the heat exchanger may be already close to the anti-freezing protection temperature. The control device 500 controls the compressor 100 to reduce the frequency according to the preset speed so as to gradually reduce the cooling capacity of the air conditioner and prevent the temperature of the second section of the heat exchanger of the indoor unit from continuously decreasing below the anti-freezing protection temperature. When the temperature of the first section of the heat exchanger of the indoor unit is detected to be between the first preset temperature and the third preset temperature and the first through-flow fan 310 runs at a low wind speed, the temperature of the second section has a certain difference from the anti-freezing protection temperature. At this time, the compressor 100 is controlled to keep the current operation frequency unchanged, and the frequency of the compressor 100 is stopped from continuously increasing, so as to prevent the temperature of the second section of the indoor unit heat exchanger from continuously decreasing.
The control device 500 is further configured to: after the compressor 100 is controlled to be stopped, the first cross flow fan 310 and/or the second cross flow fan 320 are controlled to operate at a rotational speed lower than a preset rotational speed. After the air conditioner stops and refrigeration is suspended, the cross flow fan can keep running at a low wind speed so as to save electric energy.
The control device 500 is further configured to: after the compressor 100 is controlled to stop, when the temperature of the indoor unit heat exchanger 300 is higher than the first preset temperature or the second preset temperature, the compressor 100 is controlled to restart, and refrigeration is resumed.
The embodiment also provides a control method of the air conditioner. Fig. 4 is a schematic diagram of a control method of an air conditioner according to an embodiment of the present invention. The control method generally includes:
step S402, acquiring the opening and closing states of the two cross-flow fans in the air-conditioning refrigeration process. The open and close state of the cross flow fan affects the temperature of the indoor unit heat exchanger 300. When a certain cross flow fan is started, the heat exchange efficiency between the heat exchanger section corresponding to the cross flow fan and ambient air is high, and the temperature of the heat exchanger section is high during air conditioning refrigeration. Conversely, when a certain cross-flow fan is closed, the heat exchanger section corresponding to the cross-flow fan has low heat exchange efficiency with the ambient air, and the temperature of the heat exchanger section is low during air conditioning and refrigeration.
In step S404, the temperature of the first section of the indoor heat exchanger is continuously detected by the temperature detecting device 410. Since the temperature detecting device 410 is disposed in the first section, the temperature detecting device 410 detects the temperature value of the first section of the indoor unit heat exchanger 300.
Step S406 is performed to determine the operation mode of the compressor 100 of the air conditioner according to the open/close state of the cross flow fan and the temperature of the indoor unit heat exchanger 300. According to the above description, since the open and close states of the two cross flow fans are different, the temperatures of the first and second sections of the indoor unit heat exchanger 300 may have a certain difference. The air conditioner control method of the present embodiment first determines whether there is a temperature difference between the two heat exchanger sections according to the open and closed states of the two cross flow fans, and then determines the operation mode of the compressor 100 according to the temperature of the first section. The above-described operation modes of the compressor 100 may include: the compressor 100 normally operates, the compressor 100 stops (i.e., the air conditioner enters the anti-freeze protection mode), the frequency of the compressor 100 keeps constant, and the compressor 100 operates in a frequency-down mode.
Fig. 5 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention. The method is suitable for the air conditioner with the double cross-flow fans and is used for preventing the heat exchanger of the indoor unit of the air conditioner from frosting. The control method sequentially executes the following steps:
step S502, in the process of air-conditioning refrigeration, the opening and closing states of two cross-flow fans are obtained.
In step S504, the temperature of the indoor unit heat exchanger 300 is continuously detected by the temperature detector 410.
In step S506, it is determined whether the first crossflow fan 310 is in an on state and the second crossflow fan 320 is in an off state, i.e., whether only the first crossflow fan 310 is on is detected. When only the first through-flow fan 310 is turned on, the heat exchange efficiency of the first section of the indoor unit heat exchanger 300 is higher than that of the second section, and therefore, the temperature of the first section is higher than that of the second section.
In step S508, if the determination result in step S506 is yes, it is determined whether the temperature of the indoor unit heat exchanger 300 is lower than or equal to a first preset temperature. When only the first through-flow fan 310 is turned on, the temperature of the first section of the heat exchanger of the indoor unit is higher than that of the second section, and at this time, if the air conditioner is determined to enter the anti-freeze protection mode according to whether the data detected by the temperature detection device 410 located in the first section is higher than the anti-freeze protection temperature, the anti-freeze protection of the second section may not be timely. In other words, it may result that the surface of the second section has already fallen below the anti-freeze protection temperature and even has frosted and frozen while the temperature of the first section has not yet reached the anti-freeze protection temperature range. Generally, the anti-freezing protection temperature is 0 ℃, and in this embodiment, the first preset temperature is set to be 2 ℃, that is, slightly higher than the anti-freezing protection temperature, so as to prevent the temperature of the second section of the heat exchanger of the indoor unit from being lower than the anti-freezing protection temperature.
Step S510, if the determination result in the step S506 is negative, determining whether the temperature of the first section of the indoor unit heat exchanger is lower than or equal to a second preset temperature. The second predetermined temperature is set to the freezing prevention protection temperature, i.e., 0 ℃. When the cross flow fans on the two sides are all started or only the second cross flow fan 320 is started, the condition that the temperature of the second section of the heat exchanger of the indoor unit is lower than that of the first section cannot occur, and the air conditioner judges whether the air conditioner enters an anti-freezing protection mode according to whether the data detected by the temperature detection device 410 reaches the anti-freezing protection temperature.
And step 512, if the judgment result in the step 508 is yes, controlling the compressor 100 to stop, stopping the refrigeration of the air conditioner, and entering an anti-freezing protection mode. According to the above, when only the first through-flow fan 310 is in the on state, and the temperature detecting device 410 detects that the temperature of the first section of the indoor heat exchanger is lower than the first preset temperature, the air conditioner is controlled to enter the anti-freeze protection mode, so as to prevent the second section of the indoor heat exchanger from being protected in an untimely manner. If the determination result in the step S510 is yes, the compressor 100 is controlled to stop, the air conditioner stops cooling, and the air conditioner enters the anti-freezing protection mode. When the cross flow fans on both sides are turned on or only the second cross flow fan 320 is turned on, the temperature detection device 410 controls the air conditioner to enter the anti-freezing protection mode when detecting that the temperature of the first section of the indoor unit heat exchanger 300 is lower than a second preset temperature (i.e., the anti-freezing protection temperature). The first preset temperature is higher than the second preset temperature.
In step S514, if the determination result in step S508 is negative, the rotation speed of the first through-flow fan 310 is detected. The subsequent steps are to determine the operation mode of the compressor 100 of the air conditioner according to the temperature of the indoor unit heat exchanger 300 and the rotating speed of the first through-flow fan 310.
In step S516, if the determination result in step S510 is negative, the compressor 100 is controlled to normally operate. Generally, the frequency of the compressor 100 of the inverter air conditioner is adjustable, and specifically, the frequency of the compressor 100 can be automatically adjusted and changed according to the indoor ambient temperature and the outdoor ambient temperature, so that the air conditioner can achieve the optimal cooling effect. The above-mentioned controlling the normal operation of the compressor 100 means controlling the compressor 100 to increase or decrease the frequency according to the indoor ambient temperature and the outdoor ambient temperature.
Step S518, determining whether the temperature of the first section of the indoor unit heat exchanger is lower than a third preset temperature. The third preset temperature is higher than the first preset temperature, and in this embodiment, the third preset temperature may be set to be 5 ℃.
In step S520, if the determination result in step S518 is yes, it is determined whether the rotation speed of the first through flow fan 310 is greater than the predetermined rotation speed. In the present embodiment, the cross-flow fan has two wind speed stages, a high wind speed stage and a low wind speed stage. When the cross flow fan runs at a high speed, the rotating speed of the cross flow fan is higher than the preset rotating speed; when the cross-flow fan runs at a low gear, the rotating speed of the cross-flow fan is lower than the preset rotating speed.
If the determination result in the step S518 is negative, the compressor 100 is controlled to normally operate, that is, the compressor 100 is controlled to increase or decrease the frequency according to the indoor ambient temperature and the outdoor ambient temperature, so as to achieve the optimal cooling effect.
In step S522, if the determination result in step S520 is yes, the compressor 100 is controlled to perform frequency reduction according to the preset speed. In the present embodiment, the preset speed is set to 1 Hz/10S. When the first cross flow fan 310 operates at a high speed, the heat exchange efficiency of the first section of the indoor unit heat exchanger 300 is high, and the temperature difference between the first section and the second section may be large. In the present embodiment, when the temperature of the first section of the indoor unit heat exchanger 300 is detected to be between the first preset temperature and the third preset temperature, and the first through-flow fan 310 is operated at a high wind speed, the temperature of the second section of the heat exchanger may already be close to the anti-freezing protection temperature. At this time, the compressor 100 is controlled to reduce the frequency at the preset speed to gradually reduce the cooling capacity of the air conditioner, so as to prevent the temperature of the second section of the indoor unit heat exchanger 300 from continuously decreasing below the anti-freezing protection temperature.
In step S524, if the determination result in step S520 is negative, the operation frequency of the compressor 100 is kept unchanged. When the first cross flow fan 310 operates at a low speed, the heat exchange efficiency of the first section of the indoor unit heat exchanger 300 is low, and the temperature difference between the first section and the second section is not too large. In this embodiment, when it is detected that the temperature of the first section of the indoor unit heat exchanger 300 is between the first preset temperature and the third preset temperature, and the first through-flow fan 310 operates at a low wind speed, the temperature of the second section has a certain difference from the anti-freezing protection temperature. At this time, the compressor 100 may be controlled to keep the current operating frequency unchanged, so as to prevent the temperature of the second section of the indoor unit heat exchanger 300 from continuously decreasing.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (8)
1. A control method of an air conditioner is characterized in that a first section and a second section which are transversely divided along the indoor unit are arranged in the indoor unit of the air conditioner, a first cross flow fan and a second cross flow fan are respectively arranged in the first section and the second section, an indoor unit heat exchanger extends along the transverse direction of the indoor unit and comprises a first section located in the first section and a second section located in the second section, and a temperature detection device used for detecting the temperature of the first section of the indoor unit heat exchanger is further arranged in the first section, and the control method comprises the following steps:
in the process of air-conditioning refrigeration, the opening and closing states of the two cross-flow fans are obtained;
continuously detecting the temperature of the first section of the heat exchanger of the indoor unit by using the temperature detection device;
determining the operation mode of a compressor of the air conditioner according to the opening and closing state of the cross-flow fan and the temperature of the first section of the heat exchanger of the indoor unit; wherein
The step of determining the operation mode of the compressor of the air conditioner according to the opening and closing state of the cross-flow fan and the temperature of the first section of the heat exchanger of the indoor unit comprises the following steps:
judging whether the first cross flow fan is in an opening state or not, and judging whether the second cross flow fan is in a closing state or not;
if so, judging whether the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to a first preset temperature;
if the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to the first preset temperature, controlling the compressor to stop;
if the temperature of the first section of the indoor unit heat exchanger is higher than the first preset temperature, detecting the rotating speed of the first through-flow fan, and determining the operation mode of the compressor of the air conditioner according to the temperature of the first section of the indoor unit heat exchanger and the rotating speed of the first through-flow fan;
if not, judging whether the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to a second preset temperature or not;
if the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to the second preset temperature, controlling the compressor to stop; wherein
The first preset temperature is greater than the second preset temperature.
2. The control method of claim 1, wherein the step of determining the operation mode of the compressor of the air conditioner according to the temperature of the first section of the indoor unit heat exchanger and the rotation speed of the first through-flow fan comprises:
judging whether the temperature of the first section of the indoor unit heat exchanger is lower than a third preset temperature or not;
if so, judging whether the rotating speed of the first through-flow fan is greater than a preset rotating speed or not;
if so, controlling the compressor to reduce the frequency according to a preset speed;
if not, keeping the running frequency of the compressor unchanged; wherein
The third preset temperature is greater than the first preset temperature.
3. The control method according to claim 2, wherein the step of controlling the compressor after the shutdown further comprises:
and controlling the first cross-flow fan and/or the second cross-flow fan to operate at a rotating speed lower than the preset rotating speed.
4. The control method according to claim 2, wherein the step of controlling the compressor after the shutdown further comprises:
and when the temperature of the first section of the heat exchanger of the indoor unit is detected to be higher than a first preset temperature or a second preset temperature, controlling the compressor to restart.
5. An air conditioner, comprising:
indoor set, indoor set inside including along first interval and the second interval of indoor set horizontal division, indoor set includes:
the first through flow fan is arranged in the first interval;
the second cross-flow fan is arranged in the second interval;
the indoor unit heat exchanger is arranged in the indoor unit, extends along the transverse direction of the indoor unit and comprises a first section positioned in the first interval and a second section positioned in the second interval;
the temperature detection device is arranged in the first interval and used for detecting the temperature of the first section of the heat exchanger of the indoor unit;
a compressor configured to compress a refrigerant for refrigeration;
a state acquiring device configured to acquire the open and closed states of the two cross-flow fans;
the control device is electrically connected with the temperature detection device and the state acquisition device and is configured to determine the operation mode of the compressor according to the opening and closing state of the cross-flow fan and the temperature of the first section of the heat exchanger of the indoor unit;
a rotation speed detecting device configured to detect a rotation speed of the first through-flow fan; wherein
The control device is also configured to control the compressor to stop when the first cross flow fan is in an opening state, the second cross flow fan is in a closing state, and the temperature of the first section of the indoor unit heat exchanger is lower than or equal to a first preset temperature; determining an operation mode of a compressor of the air conditioner according to the temperature of the heat exchanger of the indoor unit and the rotating speed of the first crossflow fan under the conditions that the first crossflow fan is in an open state, the second crossflow fan is in a closed state and the temperature of a first section of the heat exchanger of the indoor unit is higher than a first preset temperature; and
and controlling the compressor to stop when the first cross flow fan is in a closed state or the second cross flow fan is in an open state and the temperature of the first section of the heat exchanger of the indoor unit is lower than or equal to a second preset temperature.
6. The air conditioner of claim 5, wherein the control device is further configured to:
controlling the compressor to reduce the frequency according to a preset speed under the condition that the temperature of the first section of the indoor unit heat exchanger is lower than a third preset temperature and the rotating speed of the first through-flow fan is higher than the preset rotating speed;
under the condition that the temperature of the first section of the indoor unit heat exchanger is lower than a third preset temperature and the rotating speed of the first through flow fan is less than or equal to a preset rotating speed, keeping the operating frequency of the compressor unchanged; wherein
The third preset temperature is greater than the first preset temperature.
7. The air conditioner of claim 6, wherein the control device is further configured to:
and after the compressor is controlled to stop, controlling the first cross-flow fan and/or the second cross-flow fan to operate at a rotating speed lower than the preset rotating speed.
8. The air conditioner of claim 7, wherein the control device is further configured to:
and after the compressor is controlled to stop, when the temperature of the first section of the heat exchanger of the indoor unit is higher than a first preset temperature or a second preset temperature, controlling the compressor to restart.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711008361.0A CN108050585B (en) | 2017-10-25 | 2017-10-25 | Air conditioner and control method thereof |
| PCT/CN2018/110093 WO2019080730A1 (en) | 2017-10-25 | 2018-10-12 | Air conditioner and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711008361.0A CN108050585B (en) | 2017-10-25 | 2017-10-25 | Air conditioner and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108050585A CN108050585A (en) | 2018-05-18 |
| CN108050585B true CN108050585B (en) | 2019-12-31 |
Family
ID=62119540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711008361.0A Active CN108050585B (en) | 2017-10-25 | 2017-10-25 | Air conditioner and control method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108050585B (en) |
| WO (1) | WO2019080730A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050585B (en) * | 2017-10-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN109186043B (en) * | 2018-07-19 | 2020-11-27 | 青岛海尔空调器有限总公司 | Wall-mounted air conditioner and control method thereof |
| CN114312236B (en) * | 2021-12-29 | 2024-02-09 | 上海瑾盛通信科技有限公司 | Motion sickness relieving method and related products |
| CN114423237A (en) * | 2022-01-19 | 2022-04-29 | 华为数字能源技术有限公司 | Indirect evaporative cooling unit, data center and anti-freezing control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639258A (en) * | 2008-07-31 | 2010-02-03 | Tcl集团股份有限公司 | Dehumidifying air conditioner and dehumidifying method thereof |
| CN102478299A (en) * | 2010-11-30 | 2012-05-30 | 乐金电子(天津)电器有限公司 | Motor fan assembly of split wall mounting type indoor air conditioner |
| CN103998266A (en) * | 2011-12-15 | 2014-08-20 | 株式会社电装 | Vehicle air-conditioning device |
| CN104676748A (en) * | 2013-11-29 | 2015-06-03 | 海尔集团公司 | Indoor unit of air conditioner |
| CN105115111A (en) * | 2015-09-18 | 2015-12-02 | 广东美的制冷设备有限公司 | Air conditioner indoor unit and detection method for temperature sensing bulb of air conditioner indoor unit |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58102045A (en) * | 1981-12-11 | 1983-06-17 | Hitachi Ltd | Air conditioner |
| JPH0921556A (en) * | 1995-07-05 | 1997-01-21 | Toshiba Corp | Air conditioner |
| JP3208323B2 (en) * | 1996-04-30 | 2001-09-10 | 三洋電機株式会社 | Control method of multi-type air conditioner |
| KR20010098290A (en) * | 2000-04-29 | 2001-11-08 | 구자홍 | Outdoor unit condensate water control device for airconditioner |
| JP2002089938A (en) * | 2000-09-20 | 2002-03-27 | Fujitsu General Ltd | Method of controlling air conditioner |
| CN106642509B (en) * | 2015-10-30 | 2019-05-31 | 青岛海尔空调器有限总公司 | A kind of control method for preventing heat exchanger frosting in radiant air conditioning indoor unit |
| CN106524445B (en) * | 2017-01-10 | 2019-03-22 | 美的集团武汉制冷设备有限公司 | A kind of control method of air conditioner, system and air conditioner |
| CN106839325B (en) * | 2017-02-28 | 2019-07-23 | 广东美的制冷设备有限公司 | Air-conditioner control method, device and air conditioner |
| CN108050585B (en) * | 2017-10-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
-
2017
- 2017-10-25 CN CN201711008361.0A patent/CN108050585B/en active Active
-
2018
- 2018-10-12 WO PCT/CN2018/110093 patent/WO2019080730A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101639258A (en) * | 2008-07-31 | 2010-02-03 | Tcl集团股份有限公司 | Dehumidifying air conditioner and dehumidifying method thereof |
| CN102478299A (en) * | 2010-11-30 | 2012-05-30 | 乐金电子(天津)电器有限公司 | Motor fan assembly of split wall mounting type indoor air conditioner |
| CN103998266A (en) * | 2011-12-15 | 2014-08-20 | 株式会社电装 | Vehicle air-conditioning device |
| CN104676748A (en) * | 2013-11-29 | 2015-06-03 | 海尔集团公司 | Indoor unit of air conditioner |
| CN105115111A (en) * | 2015-09-18 | 2015-12-02 | 广东美的制冷设备有限公司 | Air conditioner indoor unit and detection method for temperature sensing bulb of air conditioner indoor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108050585A (en) | 2018-05-18 |
| WO2019080730A1 (en) | 2019-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108050585B (en) | Air conditioner and control method thereof | |
| US10415842B2 (en) | Outdoor unit for air conditioner, air conditioner, and method for controlling air conditioner | |
| CN103760936B (en) | The anti-condensation environment conditioning equipment of intelligence | |
| JP4365378B2 (en) | Defrosting operation control device and defrosting operation control method | |
| JP6071648B2 (en) | Air conditioner | |
| WO2010074316A1 (en) | Air-conditioning control apparatus, cooling system, and air-conditioning control program | |
| TW202014649A (en) | Air conditioner, method for controlling air conditioner, and program | |
| JP2010223494A (en) | Air conditioner | |
| JPWO2018173120A1 (en) | Dehumidifier | |
| JP2020060362A (en) | Air conditioner | |
| CN107575998A (en) | The defrosting control method of air-conditioning and its outdoor unit | |
| CN108036472B (en) | Air conditioner dehumidification control system and air conditioner | |
| CN105371524B (en) | Compression-type refrigeration heating air conditioner system and its outdoor machine frost eliminating method | |
| CN108603681B (en) | Air conditioner and air conditioner | |
| CN111609634A (en) | Air-cooled refrigerator and defrosting control method thereof | |
| US10543856B2 (en) | Vehicle air-conditioning apparatus and railroad vehicle including the same | |
| CN206989555U (en) | A kind of novel air-cooled refrigerator | |
| JP2011043300A (en) | Air conditioner | |
| KR20120050325A (en) | Method for removing water of air conditioner | |
| JP2009287811A (en) | Air conditioner | |
| CN108072105B (en) | Air conditioner and control method thereof | |
| CN110836466B (en) | Defrosting control method for fixed-frequency air conditioner | |
| JPH0719617A (en) | Air current velocity adjusting device of condenser fan | |
| KR100432723B1 (en) | Control method for air conditioner | |
| KR100487779B1 (en) | A control method of air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |