CN109237734B - Heating control method for chassis of air conditioner outdoor unit - Google Patents
Heating control method for chassis of air conditioner outdoor unit Download PDFInfo
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- CN109237734B CN109237734B CN201811011790.8A CN201811011790A CN109237734B CN 109237734 B CN109237734 B CN 109237734B CN 201811011790 A CN201811011790 A CN 201811011790A CN 109237734 B CN109237734 B CN 109237734B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- Combustion & Propulsion (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a heating control method for a chassis of an air conditioner outdoor unit, which comprises the steps of detecting whether water, ice and ice water mixture exists in a groove of the chassis after defrosting is finished and an ice melting device is turned off; if ice or ice-water mixture exists in the groove, restarting the ice melting device, and detecting whether water, ice and ice-water mixture exists in the groove of the chassis again after the ice melting device is restarted and operates for a first set time period; if the water and ice exist in the groove, detecting whether a water, ice and ice-water mixture exists in the groove of the chassis again after a second set time period; if the groove is not filled with water, ice and ice-water mixture, detecting whether the difference between the temperature of the ice melting device and the outdoor environment temperature is larger than a set difference; if so, controlling the de-electrifying device to be powered off; the ice melting effect of the ice melting device is judged by detecting whether water, ice and ice water mixture exists in the groove of the chassis, so that the effectiveness of the ice melting device is ensured to the maximum extent, and the water stored in the chassis is prevented from being frozen.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a heating control method for a chassis of an air conditioner outdoor unit.
Background
The low-temperature air source heat pump is mainly suitable for heating seasons in severe cold areas in winter, a chassis of the outdoor unit after defrosting stores part of water, the water can be blocked by ice in the chassis if the water is discharged in time, water generated after subsequent defrosting cannot be discharged, the chassis is frozen, the defrosting effect is poor, normal work of the heat exchanger is influenced, and the heat exchange efficiency is reduced.
Disclosure of Invention
The invention provides a heating control method for a chassis of an air conditioner outdoor unit, which can avoid the chassis from being frozen.
In order to solve the technical problems, the invention adopts the following technical scheme:
a heating control method for a chassis of an air conditioner outdoor unit is characterized in that a groove is formed in the chassis, a drain hole is formed in the bottom of the groove, and an ice melting device is arranged in the groove and used for heating the chassis;
the control method comprises the following steps:
starting the ice melting device when the defrosting of the air conditioner starts; after defrosting is finished, the ice melting device is closed, and then the following steps are executed:
(1) detecting whether a water, ice and ice-water mixture exists in the groove of the chassis;
if ice or ice-water mixture exists in the groove, executing the step (2): restarting the ice melting device, and returning to the step (1) after running for a first set time period;
if the water in the groove is ice-free, returning to the step (1) after a second set time period;
if the groove is not filled with water, ice and ice-water mixture, executing the step (3): detecting whether the difference between the temperature of the ice melting device and the outdoor environment temperature is greater than a set difference or not; and if so, controlling the ice melting device to power off.
Further, after controlling the ice melting device to power off, the method further comprises: after controlling the ice melting device to be powered off for a third set time period, re-detecting whether the difference between the temperature of the ice melting device and the outdoor environment temperature is greater than a set difference or not; if so, controlling the air conditioner to power off.
Further, when the air conditioner is in heating operation, if the defrosting condition is met, the four-way valve is reversed, defrosting is started, and the ice melting device is started; and (3) after defrosting is finished, reversing the four-way valve again, closing the ice melting device after the ice melting device continues to operate for a set time period, and then executing the step (1).
Furthermore, the value range of the set difference is 4-8 ℃.
Furthermore, a tension signal in the groove is detected through a tension detection device, and whether water, ice or an ice-water mixture exists in the groove is judged according to the detected tension signal.
Still further, the tension detection devices are provided with a plurality of tension signals which are respectively detected at a plurality of positions in the groove; each tension detection device respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends a judgment result to the air conditioner control panel;
the air conditioner control panel judges whether the judgment result of the tension detection device is ice or an ice-water mixture;
if so, the air conditioner control panel judges that ice or an ice-water mixture exists in the groove;
if not, the air conditioner control panel judges whether the tension detection device exists or not, and the judgment result is that water exists or ice does not exist;
if so, the air conditioner control panel judges whether water or ice exists in the groove; if not, the air conditioner control panel judges that no water or ice exists in the groove.
Further, a density signal in the groove is detected through a density sensor, and whether water, ice or an ice-water mixture exists in the groove is judged according to the detected density signal.
Still further, the density sensors are provided with a plurality of density signals which are respectively detected at a plurality of positions in the groove; each density sensor respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends the judgment result to the air conditioner control panel;
the air conditioner control board judges whether the judgment result of the density sensor is ice or an ice-water mixture;
if so, the air conditioner control panel judges that ice or an ice-water mixture exists in the groove;
if not, the air-conditioning control panel judges whether the density sensor exists or not, and the judgment result is that water exists or ice does not exist;
if so, the air conditioner control panel judges whether water or ice exists in the groove; if not, the air conditioner control panel judges that no water or ice exists in the groove.
Further, a specific heat capacity signal in the groove is detected through the specific heat capacity detection device, and whether water, ice or an ice-water mixture exists in the groove is judged according to the detected specific heat capacity signal.
Still further, a plurality of specific heat capacity detection devices are arranged and used for respectively detecting specific heat capacity signals at a plurality of positions in the groove; each specific heat capacity detection device respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends a judgment result to the air conditioner control panel;
the air conditioner control panel judges whether the judgment result of the specific heat capacity detection device is ice or an ice-water mixture;
if so, the air conditioner control panel judges that ice or an ice-water mixture exists in the groove;
if not, the air conditioner control panel judges whether water or ice exists in the judgment result of the specific heat capacity detection device or not;
if so, the air conditioner control panel judges whether water or ice exists in the groove; if not, the air conditioner control panel judges that no water or ice exists in the groove.
Compared with the prior art, the invention has the advantages and positive effects that: the heating control method for the chassis of the air conditioner outdoor unit comprises the steps of detecting whether water, ice and ice water mixture exists in a groove of the chassis after defrosting is finished and an ice melting device is turned off; if ice or ice-water mixture exists in the groove, restarting the ice melting device, and detecting whether water, ice and ice-water mixture exists in the groove of the chassis again after the ice melting device is restarted and operates for a first set time period; if the water and ice exist in the groove, detecting whether a water, ice and ice-water mixture exists in the groove of the chassis again after a second set time period; if the groove is not filled with water, ice and ice-water mixture, detecting whether the difference between the temperature of the ice melting device and the outdoor environment temperature is larger than a set difference; if so, controlling the de-electrifying device to be powered off; therefore, when the defrosting is started, the ice melting device is started to heat the chassis, after the defrosting is finished, the ice melting device is closed, and then whether water, ice and ice water mixture exists in the groove of the chassis is detected to judge the ice melting effect of the ice melting device, so that the effectiveness of the ice melting device is ensured to the maximum extent, the water stored in the chassis is prevented from being frozen, the heat exchange efficiency of the air conditioner under the low-temperature working condition is improved, and the defrosting effect is further improved.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a flowchart illustrating a method for controlling heating of a chassis of an outdoor unit of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic structural view of the chassis in fig. 1.
Reference numerals:
1. a chassis; 1-1, a groove; 1-2, a drain hole; 1-3, a first installation position; 1-4, a second mounting position;
2. and a de-icing device.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment provides a heating control method for a chassis of an air conditioner outdoor unit to improve the defrosting effect, aiming at the problem that the chassis of the air conditioner outdoor unit is easy to freeze and affects the defrosting effect. Next, the heating control method of the chassis of the air conditioner outdoor unit according to the present embodiment will be described in detail.
The air conditioner comprises an air conditioner indoor unit and an air conditioner outdoor unit, wherein the air conditioner indoor unit is connected with the air conditioner outdoor unit. The outdoor unit of the air conditioner comprises a condenser and a base plate 1, wherein a groove 1-1 is formed in the base plate 1 to form an easy water storage area, a plurality of water drainage holes 1-2 are formed in the bottom of the groove 1-1, and an ice melting device 2 is arranged in the groove 1-1 and used for heating the base plate. The condenser is placed above the groove 1-1, and water formed by defrosting on the surface of the condenser falls into the groove 1-1 and is discharged through the water discharge hole 1-2, as shown in figure 2.
In the heating process of the air conditioner, when the defrosting condition is met, the four-way valve is reversed to start defrosting, high-temperature refrigerants discharged by the compressor enter the condenser through the four-way valve, the temperature of the condenser rises, frost on the surface of the condenser starts to melt into water, the water drops into the groove 1-1 of the base plate 1, and then the water is discharged through the water discharge hole 1-2. When defrosting is finished, the four-way valve is reversed again, and the air conditioner normally heats and operates.
According to the heating control method for the chassis of the air conditioner outdoor unit, when the defrosting of the air conditioner starts, the four-way valve is reversed, the ice melting device is started, and the chassis 1 is heated; after defrosting is finished, the four-way valve is reversed again, the ice melting device is closed, and the following steps are executed after the ice melting device is closed, which are shown in fig. 1.
Step S1: and detecting whether a water, ice and ice-water mixture exists in the groove of the chassis.
Because outdoor ambient temperature is lower, the water that the condenser surface drips to in the chassis recess can condense into ice, blocks the wash port, consequently, after the defrosting, whether there is water, ice water mixture in the chassis recess that needs to detect.
S11: if ice or ice-water mixture exists in the groove, executing step S2: and restarting the ice melting device, and returning to the step S1 after the ice melting device is restarted and operated for the first set time period. In this embodiment, the first set time period is 30 minutes, which not only avoids the situation that the ice is not completely melted due to too short time, but also avoids the situation that the electric energy is wasted due to too long time.
S12: if there is water or ice in the recess, the process returns to step S1 after detecting the second set time period when there is water or ice in the recess. Since the water in the groove may be being discharged through the water discharge hole without being discharged if there is no ice in the groove, it returns to S1 after the second set time period. In this embodiment, the second set time period is 20 minutes, which not only avoids the situation that the water is not discharged in time and is detected again due to too short time, so that the control is complicated, but also avoids the situation that the time consumption of the whole control logic is long due to too long time.
S13: if there is no water, ice, or ice-water mixture in the groove, step S3 is executed.
Step S3: and acquiring the temperature of the ice melting device and the outdoor environment temperature, and calculating the difference value of the temperature and the outdoor environment temperature.
Step S4: and judging whether the difference is larger than a set difference.
If so, the temperature difference between the ice melting device and the outdoor environment temperature is large, the ice melting device is not powered off, the ice melting device still heats the chassis, the chassis is water-free and ice-free, the chassis is burned dry, and electric energy is wasted, and then the step S5 is executed: the ice melting device is controlled to be powered off, so that electric energy waste and power utilization accidents are avoided.
The ice melting device is directly powered by the air conditioner power supply board, and if the air conditioner power supply board is powered off, the ice melting device is powered off. And a normally open contact of the relay K is connected in series on the power supply line of the air conditioner power supply board and the ice melting device, and the air conditioner control board controls whether a coil of the relay K is electrified or not. The air conditioner control panel controls the coil of the relay to be electrified, the normally open contact of the relay is closed, and the ice melting device is electrified; and the air conditioner control panel controls the coil of the relay to be powered off, so that the normally open contact of the relay is disconnected, and the ice melting device is powered off.
In the embodiment, the de-energizing of the ice melting device is controlled, the relay coil can be controlled to be energized first, and then the coil is controlled to be de-energized, so that the failure of de-energizing of the ice melting device caused by the relay failure is avoided.
According to the heating control method for the chassis of the air conditioner outdoor unit, after defrosting is finished and the ice melting device is closed, whether water, ice and ice water mixture exists in the groove of the chassis or not is detected; if ice or ice-water mixture exists in the groove, restarting the ice melting device, and detecting whether water, ice and ice-water mixture exists in the groove of the chassis again after the ice melting device is restarted and operates for a first set time period; if the water and ice exist in the groove, detecting whether a water, ice and ice-water mixture exists in the groove of the chassis again after a second set time period; if the groove is not filled with water, ice and ice-water mixture, detecting whether the difference between the temperature of the ice melting device and the outdoor environment temperature is larger than a set difference; if so, controlling the de-electrifying device to be powered off; therefore, according to the control method of the embodiment, when defrosting is started, the ice melting device is started, the chassis is heated, after defrosting is finished, the ice melting device is closed, and then whether water, ice and ice water mixture exists in the groove of the chassis is detected to judge the ice melting effect of the ice melting device, so that the effectiveness of the ice melting device is ensured to the greatest extent, water stored in the chassis is prevented from being frozen, the heat exchange efficiency of the air conditioner under a low-temperature working condition is improved, and the defrosting effect is further improved.
In the embodiment, the ice melting device of the chassis is additionally arranged and controlled, so that water generated after defrosting in the chassis can be effectively discharged, and the water in the chassis is prevented from freezing and being blocked. Meanwhile, through multiple control, the reliability of the chassis ice melting device is guaranteed, electric energy waste is reduced, the power utilization risk possibly caused is avoided, and the service life of the chassis ice melting device is prolonged.
After the ice melting device is controlled to be powered off, the control method further comprises the following steps, and the steps are shown in the figure 1.
Step S6: and after controlling the de-electrifying of the ice melting device for a third set time period, re-acquiring the temperature of the ice melting device and the outdoor environment temperature, and calculating the difference value of the two temperatures.
Step S7: and judging whether the difference is larger than a set difference.
If yes, it indicates that the ice melting device is failed or not powered off, and the air conditioner may also be failed, then step S8 is executed: and controlling the air conditioner to be powered off. After the power panel of the air conditioner is powered off, the ice melting device is forced to be powered off, so that the safety of the air conditioner and the ice melting device is ensured, and the problem that internal parts are damaged due to the fact that the ice melting device is not normally powered off is effectively solved.
The power failure and the control protection of the ice melting device are dual, wherein the first is to utilize a relay to perform power failure control, and the second is to forcibly power off through an air conditioner. The embodiment controls and protects the starting and stopping of the ice melting device, and avoids the influence on other parts of the air conditioner unit caused by the mistaken power-on starting or power failure of the ice melting device to the maximum extent.
In this embodiment, the value range of the difference is set to be 4-8 ℃; in the value range, the error power-off of the ice melting device caused by over-small value is avoided, and the overheating and power utilization accidents of the ice melting device caused by over-large value are also avoided; therefore, within the value range, normal power supply of the ice melting device is ensured, and dry burning of the chassis and waste of electric energy are avoided.
In this embodiment, the third set time period is 3 minutes, which not only avoids the occurrence of power utilization accidents caused by too long time, but also avoids the influence on the normal operation of the ice melting device and the air conditioner caused by frequent control and caused by too short time.
When the air conditioner is in heating operation, if the defrosting condition is met, the four-way valve is reversed, defrosting is started, the ice melting device is started, the chassis is heated, and the chassis is prevented from being frozen; and after defrosting is finished, reversing the four-way valve again, continuing to operate the ice melting device for a set time period, closing the ice melting device again to prevent water dripping into the chassis from freezing, avoiding water from freezing again and wasting electric energy, and then executing the step S1.
The ice melting device is an electric heating device, such as an electric heating tube, a resistor, an electric heating belt and the like, and the energy utilization rate can be improved to the greatest extent by accurate control, so that the unit is more energy-saving. Of course, the ice melting device can also convert other energy into heat energy, and is not limited to electric energy.
In this embodiment, since the tensions of water, ice, and an ice-water mixture are different, it is possible to determine whether the groove is filled with water, ice, or an ice-water mixture by detecting the tension. Detecting a tension signal in the groove through a tension detection device, and judging whether water, ice or an ice-water mixture exists in the groove according to the detected tension signal; the detection method is simple and the judgment result is accurate.
For example,
if the detected tension signal is within a first set tension range, ice or an ice-water mixture is in the groove;
if the detected tension signal is within a second set tension range, the groove is filled with water or ice;
and if the detected tension signal is within the third set tension range, the groove is filled with anhydrous, ice-free and ice-water-free mixture.
In this embodiment, the tension detection device is provided with a plurality of tension signals respectively detecting a plurality of positions in the groove and sending the tension signals to the air-conditioning control panel. For example, the ice melting device is installed in the groove 1-1, and the front section, the middle section and the rear section of the ice melting device in the groove 1-1 are respectively provided with a tension detection device, that is, the three first installation positions 1-3 of the groove are respectively provided with a tension detection device. And a tension detection device is respectively distributed at three positions away from the ice melting device in the groove, namely at 1-4 positions of the three second mounting positions. Namely, six tension detection devices are distributed in the groove.
The detection process comprises the following steps:
(a) and each tension detection device respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends the judgment result to the air conditioner control panel.
(b) The air conditioner control panel judges whether the judgment result of the tension detection device is ice or ice-water mixture.
If so, namely at least one tension detection device detects that ice or ice-water mixture exists in the groove, the air conditioner control board finally judges that the ice or ice-water mixture exists in the groove, and S11 is executed.
If not, all the tension detection devices do not detect that ice or ice-water mixture exists in the grooves; the air conditioner control panel judges whether the tension detection device exists or not, and the judgment result is that water exists or ice does not exist.
If so, namely at least one tension detection device detects that water or ice exists in the groove, the air-conditioning control panel finally judges that water or ice exists in the groove, and S12 is executed.
If not, the air conditioner control board judges that no water or ice exists in the groove and no ice-water mixture exists, and then step S13 is executed.
According to the detection process, as long as any one tension detection device detects ice or ice-water mixture, the air conditioner control board judges that the ice or the ice-water mixture exists in the groove, the step S11 is executed, the ice melting device is restarted, and the chassis is prevented from being frozen to the maximum extent. When all the tension detecting devices do not detect that ice or ice-water mixture exists in the groove, as long as any one of the tension detecting devices detects that water or ice exists in the groove, the air-conditioning control board judges that water or ice exists in the groove, and step S12 is executed. When all the tension detection devices do not detect that water, ice and an ice-water mixture exist in the groove, the air-conditioning control board judges that no water or ice exists in the groove and no ice-water mixture exists in the groove, and the step S13 is executed.
As another preferred design of this embodiment, since the densities of water, ice and the ice-water mixture are different, it is possible to determine whether the water, ice or the ice-water mixture is in the groove by density detection. In the embodiment, a density signal in the groove is detected by a density sensor, and whether water, ice or an ice-water mixture exists in the groove is judged according to the detected density signal; the detection method is simple and the judgment result is accurate.
For example,
if the detected density signal is within a first set density range, ice or an ice-water mixture is in the groove;
if the detected density signal is within a second set density range, the groove is filled with water or ice;
and if the detected density signal is within the third set density range, the groove is filled with anhydrous, ice-free and ice-water-free mixture.
In this embodiment, the density sensor is provided with a plurality of, detect the tension signal of a plurality of positions in the recess respectively, and send air conditioner control panel. For example, the ice melting device is installed in the groove 1-1, and a density sensor is respectively arranged at the front section, the middle section and the rear section of the ice melting device in the groove 1-1, namely, a density sensor is respectively installed at three first installation positions 1-3 of the groove. And a density sensor is respectively distributed at three positions away from the ice melting device in the groove, namely 1-4 positions of the three second mounting positions. Namely, six density sensors are distributed in the groove.
The detection process comprises the following steps:
(c) and each density sensor respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends the judgment result to the air conditioner control panel.
(d) The air conditioner control panel judges whether the judgment result of the density sensor is ice or ice-water mixture.
If so, namely at least one density sensor detects that ice or ice-water mixture exists in the groove, the air conditioner control board finally judges that the ice or ice-water mixture exists in the groove, and S11 is executed.
If not, all the density sensors do not detect that ice or ice-water mixture exists in the grooves; the air conditioner control panel judges whether the density sensor exists or not, and the judgment result is that water exists or ice does not exist.
If yes, namely at least one density sensor detects that water or ice exists in the groove, the air conditioner control board finally judges that water or ice exists in the groove, and S12 is executed.
If not, the air conditioner control board judges that no water or ice exists in the groove and no ice-water mixture exists, and then step S13 is executed.
According to the detection process, as long as any density sensor detects ice or ice-water mixture, the air conditioner control board judges that the ice or ice-water mixture exists in the groove, the step S11 is executed, the ice melting device is restarted, and the chassis is prevented from being frozen to the maximum extent. When all the density sensors do not detect that ice or an ice-water mixture exists in the groove, the air-conditioning control board judges whether water exists in the groove or not as long as any one of the density sensors detects whether water exists in the groove or not, and step S12 is executed. When all the density sensors do not detect that water, ice and the ice-water mixture exist in the groove, the density sensors judge that no water or ice exists in the groove and no ice-water mixture exists, and step S13 is executed.
As another preferable design of this embodiment, since the specific heat capacities of water, ice and an ice-water mixture are different, it is possible to determine whether water, ice or an ice-water mixture is in the groove by detecting the specific heat capacities. In the embodiment, a specific heat capacity signal in the groove is detected by a specific heat capacity detection device, and whether water, ice or an ice-water mixture exists in the groove is judged according to the detected specific heat capacity signal; the detection method is simple and the judgment result is accurate.
For example,
if the detected specific heat capacity signal is within a first set specific heat capacity range, ice or an ice-water mixture is in the groove;
if the detected specific heat capacity signal is within a second set specific heat capacity range, water or ice exists in the groove;
and if the detected specific heat capacity signal is within the third set specific heat capacity range, the groove is filled with an anhydrous ice-free and ice-water-free mixture.
In this embodiment, specific heat capacity detection device is provided with a plurality ofly, detects the specific heat capacity signal of a plurality of positions in the recess respectively to send for air conditioner control panel. For example, the ice melting device is installed in the groove 1-1, and a specific heat capacity detection device is respectively distributed at the front section, the middle section and the rear section of the ice melting device in the groove 1-1, namely, a specific heat capacity detection device is respectively installed at three first installation positions 1-3 of the groove. And a specific heat capacity detection device is respectively distributed at three positions away from the ice melting device in the groove, namely 1-4 positions of the three second mounting positions. Namely, six specific heat capacity detection devices are distributed in the groove.
The detection process comprises the following steps:
(e) and each specific heat capacity detection device respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends a judgment result to the air conditioner control panel.
(f) And the air conditioner control panel judges whether the judgment result of the specific heat capacity detection device is ice or an ice-water mixture.
If so, namely at least one specific heat capacity detection device detects that ice or an ice-water mixture exists in the groove, the air conditioner control board finally judges that the ice or the ice-water mixture exists in the groove, and S11 is executed.
If not, all the specific heat capacity detection devices do not detect that ice or ice-water mixture exists in the grooves; the air conditioner control panel judges whether the judgment result of the specific heat capacity detection device is water or ice.
If yes, namely at least one specific heat capacity detection device detects whether water or ice exists in the groove, the air conditioner control panel finally judges whether water or ice exists in the groove, and S12 is executed.
If not, the air conditioner control board judges that no water or ice exists in the groove and no ice-water mixture exists, and then step S13 is executed.
According to the detection process, as long as any specific heat capacity detection device detects ice or ice-water mixture, the air conditioner control board judges that the ice or the ice-water mixture exists in the groove, the step S11 is executed, the ice melting device is restarted, and the chassis is prevented from being frozen to the maximum extent. When all the specific heat capacity detection devices do not detect that ice or ice-water mixture exists in the groove, the air-conditioning control board judges whether water exists in the groove or not as long as any specific heat capacity detection device detects whether water exists in the groove or not, and step S12 is executed. When all the specific heat capacity detection devices do not detect that water, ice and an ice-water mixture exist in the groove, the air-conditioning control board judges that no water or ice exists in the groove and no ice-water mixture exists in the groove, and step S13 is executed.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (9)
1. A heating control method for a chassis of an air conditioner outdoor unit is characterized by comprising the following steps: the chassis is provided with a groove, the bottom of the groove is provided with a drain hole, and the groove is internally provided with an ice melting device for heating the chassis;
the control method comprises the following steps:
when the air conditioner is in heating operation, if the defrosting condition is met, the four-way valve is reversed, defrosting is started, and the ice melting device is started; after defrosting is finished, the four-way valve is reversed again, the ice melting device is closed after the ice melting device continues to operate for a set time period, and then the following step (1) is executed;
detecting whether a water, ice and ice-water mixture exists in a groove of a chassis;
if ice or ice-water mixture exists in the groove, executing the step (2): restarting the ice melting device, and returning to the step (1) after running for a first set time period;
if the water in the groove is ice-free, returning to the step (1) after a second set time period;
if the groove is not filled with water, ice and ice-water mixture, executing the step (3): detecting whether the difference between the temperature of the ice melting device and the outdoor environment temperature is greater than a set difference or not; and if so, controlling the ice melting device to power off.
2. The control method according to claim 1, characterized in that: after controlling the ice melting device to be powered off, the method further comprises the following steps:
after controlling the ice melting device to be powered off for a third set time period, re-detecting whether the difference between the temperature of the ice melting device and the outdoor environment temperature is greater than a set difference or not; if so, controlling the air conditioner to power off.
3. The control method according to claim 1, characterized in that: the value range of the set difference is 4-8 ℃.
4. The control method according to claim 1, characterized in that: and detecting a tension signal in the groove through a tension detection device, and judging whether water, ice or an ice-water mixture exists in the groove according to the detected tension signal.
5. The control method according to claim 4, characterized in that:
the tension detection devices are provided with a plurality of tension signals which are respectively detected at a plurality of positions in the groove;
each tension detection device respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends a judgment result to the air conditioner control panel;
the air conditioner control panel judges whether the judgment result of the tension detection device is ice or an ice-water mixture;
if so, the air conditioner control panel judges that ice or an ice-water mixture exists in the groove;
if not, the air conditioner control panel judges whether the tension detection device exists or not, and the judgment result is that water exists or ice does not exist;
if so, the air conditioner control panel judges whether water or ice exists in the groove; if not, the air conditioner control panel judges that no water or ice exists in the groove.
6. The control method according to claim 1, characterized in that: the density sensor is used for detecting density signals in the groove and judging whether water, ice or an ice-water mixture exists in the groove or not according to the detected density signals.
7. The control method according to claim 6, characterized in that:
the density sensors are provided with a plurality of density signals which are respectively detected at a plurality of positions in the groove;
each density sensor respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends the judgment result to the air conditioner control panel;
the air conditioner control board judges whether the judgment result of the density sensor is ice or an ice-water mixture;
if so, the air conditioner control panel judges that ice or an ice-water mixture exists in the groove;
if not, the air-conditioning control panel judges whether the density sensor exists or not, and the judgment result is that water exists or ice does not exist;
if so, the air conditioner control panel judges whether water or ice exists in the groove; if not, the air conditioner control panel judges that no water or ice exists in the groove.
8. The control method according to claim 1, characterized in that: the specific heat capacity signal in the groove is detected through the specific heat capacity detection device, and whether water, ice or an ice-water mixture exists in the groove or not is judged according to the detected specific heat capacity signal.
9. The control method according to claim 8, characterized in that:
the specific heat capacity detection devices are provided with a plurality of specific heat capacity signals which are respectively detected at a plurality of positions in the groove;
each specific heat capacity detection device respectively judges whether water, ice or an ice-water mixture exists in the groove or not and sends a judgment result to the air conditioner control panel;
the air conditioner control panel judges whether the judgment result of the specific heat capacity detection device is ice or an ice-water mixture;
if so, the air conditioner control panel judges that ice or an ice-water mixture exists in the groove;
if not, the air conditioner control panel judges whether water or ice exists in the judgment result of the specific heat capacity detection device or not;
if so, the air conditioner control panel judges whether water or ice exists in the groove; if not, the air conditioner control panel judges that no water or ice exists in the groove.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011790.8A CN109237734B (en) | 2018-08-31 | 2018-08-31 | Heating control method for chassis of air conditioner outdoor unit |
| PCT/CN2019/078149 WO2020042590A1 (en) | 2018-08-31 | 2019-03-14 | Heating control method for chassis of outdoor unit of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011790.8A CN109237734B (en) | 2018-08-31 | 2018-08-31 | Heating control method for chassis of air conditioner outdoor unit |
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| Publication Number | Publication Date |
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| CN109237734A CN109237734A (en) | 2019-01-18 |
| CN109237734B true CN109237734B (en) | 2021-03-19 |
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| CN201811011790.8A Active CN109237734B (en) | 2018-08-31 | 2018-08-31 | Heating control method for chassis of air conditioner outdoor unit |
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| CN (1) | CN109237734B (en) |
| WO (1) | WO2020042590A1 (en) |
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| CN109237734B (en) * | 2018-08-31 | 2021-03-19 | 青岛海尔空调电子有限公司 | Heating control method for chassis of air conditioner outdoor unit |
| CN110500751A (en) * | 2019-08-23 | 2019-11-26 | 珠海格力电器股份有限公司 | Thawing apparatus changes ice method and air conditioner |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1385881A (en) * | 1971-02-12 | 1975-03-05 | Hawker Siddeley Dynamics Ltd | Air conditioning systems |
| JPH0663660B2 (en) * | 1986-01-10 | 1994-08-22 | 東京電力株式会社 | Heat storage amount detector for ice storage type heat source device |
| JP3852501B2 (en) * | 1997-05-12 | 2006-11-29 | 三菱電機株式会社 | Thermal storage air conditioner |
| CN2472159Y (en) * | 2001-04-16 | 2002-01-16 | 广东科龙电器股份有限公司 | Hot Pump air conditioner with assisting defrosting and heating device |
| US20050126282A1 (en) * | 2003-12-16 | 2005-06-16 | Josef Maatuk | Liquid sensor and ice detector |
| CN101113859B (en) * | 2006-07-28 | 2012-03-28 | 海尔集团公司 | Refrigerator evaporator defrost method and defrosting device using the method |
| NZ603227A (en) * | 2010-04-22 | 2015-03-27 | Univ Texas | Surface-mounted monitoring system |
| CN202171375U (en) * | 2011-07-28 | 2012-03-21 | Tcl空调器(中山)有限公司 | Anti-frozen structure of bottom plate and air conditioner |
| CN104279646A (en) * | 2013-07-01 | 2015-01-14 | 广东美的制冷设备有限公司 | Outdoor unit of air conditioner, base plate assembly of outdoor unit and defrosting method for outdoor unit of air conditioner |
| CN106352443A (en) * | 2016-10-25 | 2017-01-25 | 美的集团武汉制冷设备有限公司 | Base plate structure, air conditioner and defrosting control method for air conditioner |
| CN106895619A (en) * | 2016-11-30 | 2017-06-27 | 美的集团武汉制冷设备有限公司 | The deicing control method of air-conditioner and chassis of outdoor unit of air conditioner |
| CN107388416A (en) * | 2017-07-14 | 2017-11-24 | 珠海格力电器股份有限公司 | Air-conditioner outdoor unit and its control method |
| CN107525224A (en) * | 2017-08-03 | 2017-12-29 | 珠海格力电器股份有限公司 | The control method and air-conditioning equipment of air-conditioner outdoor unit |
| CN207380962U (en) * | 2017-08-09 | 2018-05-18 | 陈心悦 | Physics calorifics laboratory device |
| CN109237734B (en) * | 2018-08-31 | 2021-03-19 | 青岛海尔空调电子有限公司 | Heating control method for chassis of air conditioner outdoor unit |
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2018
- 2018-08-31 CN CN201811011790.8A patent/CN109237734B/en active Active
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| WO2020042590A1 (en) | 2020-03-05 |
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Effective date of registration: 20210207 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER ELECTRIC Co.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER ELECTRIC Co.,Ltd. |
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