CN110608510A - Air conditioner, outdoor unit, defrosting device, defrosting control method and defrosting control system - Google Patents
Air conditioner, outdoor unit, defrosting device, defrosting control method and defrosting control system Download PDFInfo
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- CN110608510A CN110608510A CN201910775866.2A CN201910775866A CN110608510A CN 110608510 A CN110608510 A CN 110608510A CN 201910775866 A CN201910775866 A CN 201910775866A CN 110608510 A CN110608510 A CN 110608510A
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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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Abstract
The invention relates to an air conditioner, an air conditioner external unit defrosting device, an air conditioner external unit defrosting control method and an air conditioner external unit defrosting control system; the defrosting device of the air conditioner external unit comprises an air duct, a heating element arranged in the air duct and a driving element arranged in the air duct; the air duct is provided with an air inlet and an air outlet, and the driving piece can drive the air flow to flow from the air inlet to the air outlet; the heating element can heat the air flow in the air duct, and the air outlet of the air duct faces the heat exchange tube of the air conditioner external unit. The normal operation and the heat exchange effect of the outer heat exchanger are ensured, and the heating effect of the whole air conditioner is further ensured; the effect is more direct, and the defrosting effect and efficiency are better; moreover, the flow direction of a heat exchange agent in the air conditioning system is prevented from being switched to defrost, so that the evaporator is prevented from absorbing indoor heat, the indoor temperature is prevented from being reduced, the stability and the comfort of the indoor temperature are improved, defrosting and heating can be carried out simultaneously, and the heating efficiency and the defrosting efficiency are improved.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an air conditioner, an air conditioner external unit defrosting device, an air conditioner external unit defrosting control method and an air conditioner external unit defrosting control system.
Background
In the process of operating the heat pump type air conditioning device in cold seasons, the temperature of the outdoor side heat exchanger is lower than the ambient temperature. If the outdoor ambient temperature is below 7 deg.c, the surface temperature of the outdoor side heat exchanger may be below 0 deg.c. If the humidity of the outdoor environment is high enough, the outdoor heat exchanger frosts or even freezes, so that the heat exchange of the outdoor heat exchanger is seriously hindered, the heating performance of the heat pump type air conditioning device is rapidly and greatly attenuated, the heating effect is obviously influenced, and even the air conditioner compressor fails. For this reason, the outdoor heat exchanger needs to be defrosted in time. The traditional defrosting mode in the prior art is as follows: in order to defrost the outdoor heat exchanger, the four-way reversing valve is switched to a refrigeration cycle flow, and high-temperature and high-pressure refrigerant discharged by the compressor is discharged into the outdoor heat exchanger through the four-way reversing valve so as to melt a frost layer or an ice layer on the outdoor heat exchanger. However, the traditional defrosting mode has more disadvantages: during defrosting, the indoor evaporator absorbs heat of a room, and the comfort of the room is influenced; when the traditional defrosting mode is adopted for defrosting, the four-way reversing valve is used for reversing, the temperature of the indoor side heat exchanger is quickly reduced to be lower than minus 20 ℃, a large amount of low-temperature liquid refrigerant is accumulated in the indoor side heat exchanger, and a large amount of heat of the indoor unit is absorbed in a natural convection mode, so that the room temperature is reduced. Particularly in cold winter, the defrosting time of the outdoor unit is longer, the heat dissipation of a room through a wall is more severe, and the fluctuation of the indoor temperature is larger; according to the comfort simulation experiment, the room temperature can be reduced by 8-10 ℃ to the maximum extent, and the room comfort is seriously influenced.
Therefore, it is desirable to provide an air conditioner, an air conditioner external unit defrosting device, an air conditioner external unit defrosting control method and a system to solve the disadvantages of the prior art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an air conditioner, an air conditioner external unit defrosting device, an air conditioner external unit defrosting control method and an air conditioner external unit defrosting control system.
A defrosting device for an air conditioner outdoor unit comprises an air duct, a heating element arranged in the air duct and a driving element arranged in the air duct;
the air duct is provided with an air inlet and an air outlet, and the driving piece can drive the air flow to flow from the air inlet to the air outlet;
the heating element can heat the air flow in the air duct, and the air outlet of the air duct faces the heat exchange tube of the air conditioner external unit.
Further, the air duct is formed in an air duct pipe, the air duct pipe is arranged in an air conditioner external machine, one end of the air duct pipe forms an air inlet of the air duct, and the other end of the air duct pipe forms an air outlet of the air duct.
Further, the driving piece is a driving fan, and the driving fan is arranged at an air inlet of the air channel.
Further, the heating member is a PTC heater, and the PTC heater is arranged in the air duct and arranged between the air inlet and the air outlet.
Furthermore, the air conditioner further comprises a temperature measuring assembly and a controller which are electrically connected with each other, wherein the temperature measuring assembly comprises a first temperature sensor arranged in the installation environment of the air conditioner external unit, a second temperature sensor arranged on a heat exchange tube in the air conditioner external unit and a third temperature sensor arranged in an air outlet of the air duct.
Further, the controller is electrically connected to the driving member and the heating member, respectively.
Based on the same inventive concept, the invention also provides a defrosting control method of the air conditioner external unit, which comprises the following steps:
acquiring an actually measured environment temperature and an actually measured heat exchange tube temperature;
judging whether the actually measured environment temperature and the actually measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group, if so, generating a defrosting command corresponding to the starting group;
the defrost command is executed.
Further, the parameter conditions of each starting group comprise a first range and a second range which are matched with each other, the first range is a range of the ambient temperature meeting the starting conditions, and the second range is a range of the temperature of the heat exchange tube meeting the starting conditions.
Further, the step of judging whether the actually measured ambient temperature and the actually measured heat exchange tube temperature simultaneously meet the parameter conditions of any starting group includes:
sequentially comparing the first range of each starting group with the actually measured environmental temperature to select the starting group containing the actually measured environmental temperature in the first range;
and sequentially comparing the second range of each selected starting group with the actually-measured heat exchange tube temperature to determine whether the starting group containing the actually-measured heat exchange tube temperature exists in the second range, and if so, determining that the actually-measured environment temperature and the actually-measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group.
Further, the executing the defrost command includes: heating and driving the air flow to the heat exchange tube.
Further, the defrost command includes: a stabilization temperature requirement for the defrost gas flow and a stabilization time requirement for the defrost gas flow.
Further, while the defrost command is being executed, the control method further includes:
acquiring actually measured stable temperature from time to time;
judging whether the actually measured stable temperature meets the stable temperature requirement, if so, generating and executing a constant temperature command and starting to calculate actually measured stable time by taking the time point as a starting point;
and judging whether the measured stable time reaches the stable time requirement, if so, generating and executing a stop command.
Based on the same invention concept, the invention also provides an air conditioner external unit defrosting control system, which comprises:
the acquisition module is used for acquiring the actually measured environment temperature and the actually measured heat exchange tube temperature;
the judging module is used for judging whether the actually measured environment temperature and the actually measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group, and if so, a defrosting command corresponding to the starting group is generated;
an execution module to execute the defrost command.
Further, the method also comprises the following steps:
a storage module for storing a combination of a plurality of startup groups and startup commands, each of the startup groups including a first range and a second range, each of the startup commands including a stabilization temperature requirement for a defrost gas flow and a stabilization time requirement for the defrost gas flow;
the timing module is used for timing.
Based on the same inventive concept, the invention also provides an air conditioner external unit, which comprises the defrosting device and the defrosting control system of the air conditioner external unit.
Based on the same inventive concept, the invention also provides an air conditioner, which comprises the air conditioner outdoor unit.
Compared with the closest prior art, the technical scheme of the invention has the following advantages:
according to the defrosting device for the air conditioner outdoor unit, provided by the technical scheme, the independent air channel is arranged, a flow path can be provided for defrosting air flow, the air channel is internally provided with the heating element for heating the air flow and the driving element for driving the air flow, and under the combined action of the driving element and the heating element, defrosting hot air is blown to the heat exchange tube towards which the defrosting hot air faces from the air outlet of the air channel, so that the defrosting hot air can be timely removed when frost exists on the heat exchange tube or is about to form the frost, the normal operation and the heat exchange effect of the outer heat exchanger are ensured, and the heating effect of the whole air conditioner is further ensured; moreover, because defrosting hot air is blown to the heat exchange tube from the outside, compared with the defrosting of a high-temperature heat exchange agent in the heat exchange tube, the effect is more direct, and the defrosting effect and efficiency are better; moreover, due to the fact that the independent air channel is arranged to supply defrosting hot air, the flow direction of a heat exchange agent in the air conditioning system is prevented from being switched to defrost, the evaporator is prevented from absorbing indoor heat, the indoor temperature is prevented from being reduced, the stability and the comfort of the indoor temperature are improved, defrosting and heating can be conducted simultaneously, and the heating efficiency and the defrosting efficiency are improved.
Drawings
Fig. 1 is a schematic structural view of an air conditioner external unit defrosting apparatus according to embodiment 1 of the present invention;
fig. 2 is a flowchart of a defrosting control method for an external unit of an air conditioner according to embodiment 2 of the present invention.
Wherein, 1-air duct; 2-air duct pipe; 3-a driving member; 4-a heating element; 5-air inlet; 6-air outlet; 7-heat exchange tube; 8-a first temperature sensor; 9-a second temperature sensor; 10-a third temperature sensor; 11-a controller.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying examples and figures 1-2. Fig. 1 is a schematic structural view of an air conditioner outdoor unit defrosting apparatus according to the present invention; and fig. 2 is a flowchart of a defrosting control method for an external unit of an air conditioner according to the present invention.
Example 1
As shown in fig. 1, the present invention provides an air conditioner outdoor unit defrosting device, which includes an air duct 1, a heating element 4 disposed in the air duct 1, and a driving element 3 disposed in the air duct 1; the air duct 1 is provided with an air inlet 5 and an air outlet 6, and the driving piece 3 can drive air flow to flow from the air inlet 5 to the air outlet 6; the heating element 4 can heat the air flow in the air duct 1, and the air outlet 6 of the air duct 1 faces the heat exchange tube 7 of the air conditioner external unit.
The independent air channel 1 is arranged, a flow path can be provided for defrosting air flow, the air channel 1 is internally provided with the heating element 4 for heating the air flow and the driving element 3 for driving the air flow, under the combined action of the driving element 3 and the heating element 4, defrosting hot air is blown to the heat exchange tube 7 facing the air channel 1 from the air outlet 6 of the air channel 1 continuously, and can be removed in time when frost exists on the heat exchange tube 7 or is about to form frost, so that the normal operation and the heat exchange effect of the outer heat exchanger are ensured, and the heating effect of the whole air conditioner is further ensured; moreover, because defrosting hot air is blown to the heat exchange tube 7 from the outside, compared with defrosting of a high-temperature heat exchange agent in the heat exchange tube 7, the effect is more direct, and the defrosting effect and efficiency are better; moreover, due to the fact that the independent air channel 1 is arranged to supply defrosting hot air, the flow direction of a heat exchange agent in the air conditioning system is prevented from being switched to defrost, the evaporator is prevented from absorbing indoor heat, the indoor temperature is prevented from being reduced, the stability and the comfort of the indoor temperature are improved, defrosting and heating can be conducted simultaneously, and the heating efficiency and the defrosting efficiency are improved.
In some embodiments of the present invention, the air duct 1 is formed in an air duct tube 2, the air duct tube 2 is disposed in an air conditioner external machine, one end of the air duct tube 2 forms an air inlet 5 of the air duct 1, and the other end of the air duct tube 2 forms an air outlet 6 of the air duct 1. The air duct pipe 2 is a flow guide pipe arranged in the air conditioner external unit, can guide airflow from the air conditioner external unit to the heat exchange pipe 7, is independent relative to other parts of the air conditioner external unit and the heat exchange air duct 1 of the air conditioner external unit, is not influenced, and can stably supply airflow; the air inlet 5 and the air outlet 6 can be designed according to the structure of the air duct pipe 2 and the requirements for air inlet and air outlet, the air outlet 6 is generally arranged on the end face of the end part of the air duct pipe 2, the air inlet 5 can be arranged on the side wall of the end part of the air duct pipe 2, the area which can be arranged is larger than the air outlet 6, and therefore the air speed of the air outlet 6 can be improved.
In some embodiments of the present invention, the driving member 3 is a driving fan, and the driving fan is disposed at the air inlet 5 of the air duct 1. The driving fan can be an axial flow fan, a cross flow fan or a centrifugal fan, can be selected according to the air inlet requirement and the shape of the air inlet 5, and fans in other forms can meet the air inlet requirement and can also be selected for use if the shape of the fans is matched with that of the air inlet.
In some embodiments of the present invention, the heating element 4 is a PTC heater, and the PTC heater is disposed in the air duct 1 and between the air inlet 5 and the air outlet 6. The PTC heater consists of a PTC ceramic heating element and an aluminum tube. The heater has the advantages of small thermal resistance and high heat exchange efficiency, is an automatic constant-temperature and power-saving electric heater, has outstanding safety performance, does not generate the phenomenon of reddening on the surface of the electric heating tube heater under any application condition, and avoids potential safety hazards. And with this heater setting in the middle part of air duct pipe 2, can enough make the air current that enters into in the air duct pipe 2 very smooth and easy, again can in time heat transfer, make the air current flow out reach the required temperature behind air outlet 6, can accomplish the task of defrosting.
In some embodiments of the present invention, the air conditioner further comprises a temperature measuring assembly and a controller 11 electrically connected to each other, wherein the temperature measuring assembly comprises a first temperature sensor 8 disposed in an installation environment of an air conditioner external unit, a second temperature sensor 9 disposed on a heat exchange pipe 7 in the air conditioner external unit, and a third temperature sensor 10 disposed in an air outlet 6 of the air duct 1.
In some embodiments of the invention, the controller 11 is electrically connected to the drive member 3 and the heating member 4, respectively.
The controller 11 can acquire the temperature of the temperature measuring component electrically connected with the controller, namely, the temperature of the environment can be acquired through the first temperature sensor 8, the temperature of the heat exchange tube 7 can be acquired through the second temperature sensor 9, the hot air defrosting temperature can be acquired through the third temperature sensor 10, and the controller 11 can also control the operation and power of the driving part 3 and the heating part 4, so that the controller 11 can determine whether defrosting is needed or not and determine the defrosting power and time through the environment temperature and the temperature of the heat exchange tube 7, determine whether defrosting is completed or not through the hot air defrosting temperature and the defrosting duration, and can finish defrosting.
Example 2
As shown in fig. 2, based on the same inventive concept, the present invention further provides a defrosting control method for an air conditioner external unit, the control method comprising the following steps: s1, acquiring the actually measured environment temperature and the actually measured heat exchange tube temperature; s2, judging whether the measured environment temperature and the measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group, if so, generating a defrosting command corresponding to the starting group; and S3, executing the defrosting command.
Through actually measured ambient temperature and actually measured heat exchange tube temperature and the parameter condition of every start group contrast, confirm whether there is the start group can contain above-mentioned two temperatures simultaneously, be the condition that needs the defrosting promptly when containing simultaneously, consequently need defrost when this kind of condition, the defrosting needs to have the needle to correspond moreover, needs confirm the defrosting order that corresponds with it according to above-mentioned start group and carries out the defrosting. The defrosting control process can accurately judge defrosting conditions and determine defrosting time, so that defrosting can be timely performed when defrosting is necessary, energy waste cannot be caused when defrosting is unnecessary, and due to the matching of defrosting commands and requirements, the aim of defrosting is improved, and the utilization rate of energy is further improved.
In some embodiments of the present invention, the parameter conditions of each of the start-up groups include a first range and a second range which are matched with each other, the first range is a range of the ambient temperature which meets the start-up conditions, and the second range is a range of the temperature of the heat exchange tube which meets the start-up conditions. According to the experience of the air conditioner operation process and the defrosting process, the occurrence of the frosting of the heat exchange tube is comprehensively influenced by two factors, namely the environment temperature and the heat exchange tube temperature; different ambient temperature, when the heat exchange tube frosted, its surperficial temperature also is different, and ambient temperature and heat exchange tube temperature have certain corresponding relation moreover, and specific corresponding relation is shown below the table:
TABLE 1 comparison table of parameter conditions in each starting group
| Start group numbering | Ambient temperature | Temperature of heat exchange tube |
| 1 | 7-17℃ | -1℃ |
| 2 | 0-7℃ | -5℃ |
| 3 | (-7)-0℃ | -8℃ |
| 4 | (-14)-(-7)℃ | -12℃ |
| 5 | (-21)-(-14)℃ | -17℃ |
| 6 | (-28)-(-21)℃ | -20℃ |
| 7 | Below (-28) DEG C | -22℃ |
As can be seen from the above table, there are at least seven starting groups, each of which includes an ambient temperature range and a heat exchange tube temperature range corresponding to each other, and if the two ranges in one starting group are satisfied, the defrosting condition is satisfied, and if different starting groups are satisfied, different defrosting modes are corresponding to the different starting groups, and the specific defrosting mode is described below and is not described herein again; the number of the starting groups and the interval size of the environment temperature corresponding to each starting group in the table are set according to defrosting experience, and during actual application, adjustment and correction can be further performed according to needs, for example, interval division of the environment temperature can be further refined and divided into a plurality of starting groups, the temperature of the heat exchange tubes corresponding to different intervals can be adjusted according to subsequent experience, and the adjustment and correction can be performed through a controller or a main control panel of an air conditioner.
In some embodiments of the present invention, determining whether the measured ambient temperature and the measured heat exchange tube temperature simultaneously meet the parameter condition of any starting group includes: sequentially comparing the first range of each starting group with the actually measured environmental temperature to select the starting group containing the actually measured environmental temperature in the first range; and sequentially comparing the second range of each selected starting group with the actually-measured heat exchange tube temperature to determine whether the starting group containing the actually-measured heat exchange tube temperature exists in the second range, and if so, determining that the actually-measured environment temperature and the actually-measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group.
And judging whether the actually measured environment temperature and the actually measured heat exchange tube temperature simultaneously meet the two ranges in one starting group, positioning to the corresponding starting group through the actually measured environment temperature, comparing whether the actually measured heat exchange tube temperature is consistent with the heat exchange tube temperature in the starting group, and judging that the defrosting condition is met if the actually measured environment temperature and the actually measured heat exchange tube temperature are consistent.
In some embodiments of the invention, said performing said defrost command comprises: heating and driving the air flow to the heat exchange tube. The air flow is heated and driven, defrosting hot air can be generated, and the defrosting hot air is blown to the heat exchange tube, so that defrosting can be finished.
In some embodiments of the invention, the defrost command comprises: a stabilization temperature requirement for the defrost gas flow and a stabilization time requirement for the defrost gas flow. The defrost command is directly related to the two ranges in the start-up group, i.e. different ambient temperatures and heat exchanger tube temperatures require different temperature air flows to be blown for different times. The temperature and time requirements within the specific start-up group and comfort command are given in the following table:
TABLE 2 comparison of parameter conditions in defrost command for each starting group
| Start group numbering | Stable temperature requirement | Required settling time |
| 1 | 70℃ | 17℃ |
| 2 | 80℃ | 20℃ |
| 3 | 80℃ | 20℃ |
| 4 | 70℃ | 17℃ |
| 5 | 60℃ | 15℃ |
| 6 | 50℃ | 10℃ |
| 7 | 50℃ | 10℃ |
As can be seen from the above table, the stable temperature requirement and the stable time requirement in the defrosting commands corresponding to different start groups are different, the stable temperature requirement and the stable time requirement in each command can obtain a defrosting heat value, and if the defrosting heat value can be ensured, the defrosting heat value can be adjusted by lowering the stable temperature requirement by 10 ℃, and then the stable time requirement corresponding to each group is correspondingly extended, so as to ensure the defrosting heat value. The two requirements of the defrosting command corresponding to the starting group can be adjusted, changed and corrected, and the operation can be completed through a controller or a main control panel of the air conditioner.
In some embodiments of the invention, while the defrost command is being executed, the control method further comprises: acquiring actually measured stable temperature from time to time; judging whether the actually measured stable temperature meets the stable temperature requirement, if so, generating and executing a constant temperature command and starting to calculate actually measured stable time by taking the time point as a starting point; and judging whether the measured stable time reaches the stable time requirement, if so, generating and executing a stop command.
When a defrosting command is executed, a driving piece and a heating piece are required to act together to form defrosting hot air to defrost, a certain time is required in the heating process, namely, the temperature is gradually increased, therefore, after the defrosting command is executed, an actually measured stable temperature needs to be obtained in real time, namely, the temperature of the defrosting hot air at an air outlet is obtained, the stable temperature requirement is not reached at the beginning, after the heating is continued for a certain time, the actually measured stable temperature can reach the stable temperature requirement, the temperature is not increased after the stable temperature requirement is reached, the defrosting hot air which is kept at a constant temperature is controlled, timing is started, namely, the actually measured stable time is obtained, the actually measured stable time is continuously close to the stable time requirement along with the lapse of time, after the stable time requirement is reached, the stable temperature requirement is met at the moment, the stable time requirement is also met, and the defrosting command is finished, a stop command is thus generated, stopping the defrost, i.e. the heating and driving of the airflow are stopped simultaneously; of course, in order to utilize the residual heat of heating and preheating, the heating element can be stopped first, and then the driving element can be operated for a certain period of time.
Example 3
Based on the same invention concept, the invention also provides an air conditioner external unit defrosting control system, which comprises: the acquisition module is used for acquiring the actually measured environment temperature and the actually measured heat exchange tube temperature; the judging module is used for judging whether the actually measured environment temperature and the actually measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group, and if so, a defrosting command corresponding to the starting group is generated; an execution module to execute the defrost command.
In some embodiments of the invention, further comprising: a storage module for storing a combination of a plurality of startup groups and startup commands, each of the startup groups including a first range and a second range, each of the startup commands including a stabilization temperature requirement for a defrost gas flow and a stabilization time requirement for the defrost gas flow; the timing module is used for timing.
Example 4
Based on the same inventive concept, the invention also provides an air conditioner external unit, which comprises the defrosting device and the defrosting control system of the air conditioner external unit.
Example 5
Based on the same inventive concept, the invention also provides an air conditioner, which comprises the air conditioner outdoor unit.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (16)
1. The defrosting device of the air conditioner outdoor unit is characterized by comprising an air duct (1), a heating element (4) arranged in the air duct (1) and a driving element (3) arranged in the air duct (1);
the air duct (1) is provided with an air inlet (5) and an air outlet (6), and the driving piece (3) can drive air flow to flow from the air inlet (5) to the air outlet (6);
the heating element (4) can heat air flow in the air duct (1), and an air outlet (6) of the air duct (1) faces a heat exchange pipe (7) of an air conditioner outdoor unit.
2. The defrosting device of an outdoor unit of an air conditioner according to claim 1, wherein the air duct (1) is formed in an air duct pipe (2), the air duct pipe (2) is arranged in the outdoor unit of the air conditioner, one end of the air duct pipe (2) forms an air inlet (5) of the air duct (1), and the other end of the air duct pipe (2) forms an air outlet (6) of the air duct (1).
3. The defrosting device for an outdoor unit of an air conditioner as claimed in claim 2, wherein the driving member (3) is a driving fan disposed at the air inlet (5) of the air duct (1).
4. The defrosting apparatus of an outdoor unit of an air conditioner according to claim 2, wherein the heating member (4) is a PTC heater disposed in the air duct (1) between the air inlet (5) and the air outlet (6).
5. The defrosting apparatus of an outdoor unit of an air conditioner according to claim 2, further comprising a temperature measuring assembly and a controller (11) electrically connected to each other, wherein the temperature measuring assembly comprises a first temperature sensor (8) disposed in an installation environment of the outdoor unit of the air conditioner, a second temperature sensor (9) disposed on a heat exchange pipe (7) in the outdoor unit of the air conditioner, and a third temperature sensor (10) disposed in an air outlet (6) of the air duct (1).
6. The outdoor unit defroster according to claim 5, wherein said controller (11) is electrically connected to said driving member (3) and said heating member (4), respectively.
7. A defrosting control method for an air conditioner outdoor unit is characterized by comprising the following steps:
acquiring an actually measured environment temperature and an actually measured heat exchange tube temperature;
judging whether the actually measured environment temperature and the actually measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group, if so, generating a defrosting command corresponding to the starting group;
the defrost command is executed.
8. The control method according to claim 7, wherein the parameter conditions of each of the start-up groups include a first range and a second range that are matched with each other, the first range being a range of the ambient temperature that meets the start-up conditions, and the second range being a range of the heat exchange tube temperature that meets the start-up conditions.
9. The control method according to claim 8, wherein the step of judging whether the measured ambient temperature and the measured heat exchange tube temperature simultaneously meet the parameter conditions of any one starting group comprises the following steps:
sequentially comparing the first range of each starting group with the actually measured environmental temperature to select the starting group containing the actually measured environmental temperature in the first range;
and sequentially comparing the second range of each selected starting group with the actually-measured heat exchange tube temperature to determine whether the starting group containing the actually-measured heat exchange tube temperature exists in the second range, and if so, determining that the actually-measured environment temperature and the actually-measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group.
10. The control method of claim 8, wherein the executing the defrost command comprises: heating and driving the air flow to the heat exchange tube.
11. The control method of claim 10, wherein the defrost command comprises: a stabilization temperature requirement for the defrost gas flow and a stabilization time requirement for the defrost gas flow.
12. The control method of claim 11, wherein while the defrost command is being executed, the control method further comprises:
acquiring actually measured stable temperature from time to time;
judging whether the actually measured stable temperature meets the stable temperature requirement, if so, generating and executing a constant temperature command and starting to calculate actually measured stable time by taking the time point as a starting point;
and judging whether the measured stable time reaches the stable time requirement, if so, generating and executing a stop command.
13. The utility model provides an outer quick-witted defrost control system of air conditioner which characterized in that includes:
the acquisition module is used for acquiring the actually measured environment temperature and the actually measured heat exchange tube temperature;
the judging module is used for judging whether the actually measured environment temperature and the actually measured heat exchange tube temperature simultaneously accord with the parameter conditions of any starting group, and if so, a defrosting command corresponding to the starting group is generated;
an execution module to execute the defrost command.
14. The control system of claim 13, further comprising:
a storage module for storing a combination of a plurality of startup groups and startup commands, each of the startup groups including a first range and a second range, each of the startup commands including a stabilization temperature requirement for a defrost gas flow and a stabilization time requirement for the defrost gas flow;
the timing module is used for timing.
15. An outdoor unit for air conditioners, comprising the outdoor unit for air conditioners of any one of claims 1 to 6 and the outdoor unit for air conditioners defrost control system of claim 13 or 14.
16. An air conditioner characterized by comprising the outdoor unit of claim 15.
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| CN110608510B (en) | 2020-08-18 |
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