CN109945399B - Defrosting method and air conditioner - Google Patents
Defrosting method and air conditioner Download PDFInfo
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- CN109945399B CN109945399B CN201910213106.2A CN201910213106A CN109945399B CN 109945399 B CN109945399 B CN 109945399B CN 201910213106 A CN201910213106 A CN 201910213106A CN 109945399 B CN109945399 B CN 109945399B
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Abstract
The invention discloses a defrosting method and an air conditioner; the defrosting method comprises the following steps: acquiring a first environment temperature of an environment where an internal unit is located; when the first environment temperature is detected to reach the preset temperature, a water storage signal is output, and the water storage signal is used for controlling the water-side heat exchanger to convey water to the water storage device for water storage; and outputting a defrosting signal when the unit is detected to meet the defrosting requirement, wherein the defrosting signal is used for controlling the water storage device to convey water to the wind side heat exchanger for defrosting. When the defrosting method is used, the influence on indoor comfort is reduced, and the experience of use of a user is improved.
Description
Technical Field
The invention relates to the technical field of heat exchange systems, in particular to a defrosting method and an air conditioner.
Background
The air source outdoor unit in the water multi-connected system is easy to frost in winter, particularly in the middle and lower reaches of Yangtze river, the humidity is high, the temperature in winter is low, the unit is easy to frost in winter heating, and if defrosting is not performed in time, the evaporator has the problems of poor heating effect, poor heat exchange and the like.
In traditional water ally oneself with system more, when outer machine gets into the defrosting, can influence the interior machine temperature, and then influence the travelling comfort that the user used.
Disclosure of Invention
On the basis, a defrosting method and an air conditioner are provided for solving the problem that when an external unit enters defrosting in a traditional water multi-connected system, the water temperature of the internal unit is influenced, and the using comfort of a user is further influenced; when the defrosting method and the air conditioner are used, the influence on the indoor comfort level is reduced, and the experience of the user is improved.
The specific technical scheme is as follows:
on one hand, the defrosting method comprises the steps of obtaining a first environment temperature of an environment where an internal machine is located, outputting a water storage signal when the first environment temperature is detected to reach a preset temperature, wherein the water storage signal is used for controlling a water side heat exchanger to convey water to a water storage device for water storage, outputting a defrosting signal when the unit is detected to reach a defrosting requirement, wherein the defrosting signal is used for controlling the water storage device to convey water to an air side heat exchanger for defrosting, obtaining a water temperature difference △ T before and after defrosting of the water storage device, reducing a set time T1 when the unit reaches a target heating temperature and increasing a set time T3 of continuous defrosting when △ T is detected to be larger than or equal to a first preset value, and increasing a set time T1 and reducing a set time T3 of continuous defrosting when △ T is detected to be smaller than or equal to a second preset value.
When the defrosting method is used, the first environment temperature of the environment where the indoor unit is located is detected, and when the first environment temperature is detected to reach the preset temperature, the water side heat exchanger is controlled to convey water to the water storage device, and because the water side heat exchanger is currently in a heating mode, the water conveyed to the indoor unit by the water side heat exchanger is hot water at the moment; when detecting the unit reaches the defrosting requirement, control water storage device and carry water to wind side heat exchanger and change the frost, so, through hot water in the water storage device is right wind side heat exchanger changes the frost, and then can reduce the influence to indoor comfort level, promotes the experience sense that the user used.
The technical solution is further explained below:
in one embodiment, the defrosting requirements include:
the set time t1 when the unit reaches the target heating temperature is less than or equal to the actual accumulated running time t2 of the compressor when the target heating temperature is reached; and is
The actual defrosting temperature of the unit is less than or equal to the defrosting set temperature of the unit; and is
In a first preset time period, the set water inlet temperature of the internal machine is less than or equal to the actual water inlet temperature of the internal machine.
In one embodiment, the method for determining the first preset value includes:
acquiring the water temperature T1 of the water storage device before defrosting;
the first water temperature limit coefficient α is preset, and the first preset value is output according to the product of T1 and α.
In one embodiment, the method for determining the first water temperature limiting coefficient α includes:
acquiring first humidity of an environment where an outdoor unit is located;
presetting a first humidity revision coefficient and a first temperature revision coefficient, and outputting the first preset value according to the product of the first temperature revision coefficient and the water temperature T1 of the water storage device before defrosting and the product of the first humidity revision coefficient and the first humidity.
In one embodiment, the method for determining the second preset value includes:
acquiring the water temperature T2 of the water storage device after defrosting;
the second water temperature limit coefficient β is preset, and a second preset value is output according to the product of T2 and β.
In one embodiment, the method for determining the second water temperature limiting coefficient β includes:
acquiring second humidity of the environment where the outdoor unit is located;
presetting a second humidity revision coefficient and a second temperature revision coefficient, and outputting a second preset value according to the product of the second temperature revision coefficient and the water temperature T1 of the water storage device before defrosting and the product of the second humidity revision coefficient and the humidity.
In one embodiment, when it is detected that the unit meets the defrosting requirement, the step of controlling the water storage device to deliver water to the air-side heat exchanger for defrosting comprises the following steps:
stopping the water side heat exchanger from conveying water to the internal machine when the unit is detected to meet the defrosting requirement;
and controlling the water storage device to convey water to the air side heat exchanger.
In one embodiment, after detecting that the unit meets the defrosting requirement and controlling the water storage device to convey water to the wind-side heat exchanger for defrosting, the method further comprises the following steps:
and when the unit is detected to meet the requirement of exiting the defrosting mode, controlling the water storage control device to stop conveying water to the air side heat exchanger.
In one embodiment, the request to exit the defrost mode includes:
the defrosting set temperature of the actual defrosting temperature unit of the unit is greater than or equal to the defrosting ending set temperature of the unit; or
The set time t3 for continuous defrosting is less than or equal to the actual defrosting duration; or
In a second preset time period, the set outlet water temperature at the tail end of the unit is greater than or equal to the actual outlet water temperature at the tail end of the unit; or
The set high pressure of the unit is less than or equal to the actual high pressure of the unit.
In another aspect, the present application further relates to an air conditioner applying the defrosting method in any of the above embodiments, including: the heat exchange structure comprises a water side heat exchanger and an air side heat exchanger; the water outlet end of the water side heat exchanger is communicated with the water inlet end of the inner machine; the temperature sensor is used for measuring a first environment temperature of the environment where the internal machine is located; the water inlet end of the water storage device is communicated with the water outlet end of the water side heat exchanger through a first pipeline, and the water outlet end of the water storage device is communicated with the water inlet end of the water side heat exchanger through a second pipeline; a first shut-off valve disposed in the first conduit; a second shut-off valve disposed in the second conduit; the monitoring unit is used for monitoring whether the unit meets the defrosting requirement or not; the controller is in communication connection with the temperature sensor, the first stop valve, the second stop valve and the monitor; when the first environment temperature reaches a preset range, the controller controls the first stop valve and the second stop valve to be opened, and water is stored in the water storage device through the water side heat exchanger; when the monitoring unit monitors that the unit meets the defrosting requirement, water is conveyed to the air side heat exchanger through the water storage device to be defrosted.
When the air conditioner is used, water is conveyed to the indoor unit through the water side heat exchanger to exchange heat and raise the temperature of the indoor unit, the first environment temperature of the indoor unit is detected through the temperature sensor, and when the first environment temperature reaches a preset range, the controller controls the first stop valve and the second stop valve to be opened, so that water is stored in the water storage device through the water side heat exchanger; when the monitor monitors that the unit meets the defrosting requirement, the water storage device conveys water to the wind side heat exchanger for defrosting, so that the influence on the indoor comfort level can be reduced, and the experience of the user is improved.
Drawings
FIG. 1 is a flow chart of a defrosting method in one embodiment;
FIG. 2 is a flow chart of a defrosting method in another embodiment;
fig. 3 is a schematic view of an air conditioner.
Description of reference numerals:
10. the air conditioner comprises an air conditioner body 100, a water side heat exchanger body 200, an internal machine body 300, a water storage device 410, a first stop valve 420, a second stop valve 430, a third stop valve 500, a temperature sensor 600, a tail end water temperature sensing bulb 700 and a wind side heat exchanger body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be integral with the other element or can be removably connected to the other element.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Further, it is to be understood that, in the present embodiment, the positional relationships indicated by the terms "lower", "upper", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "one side", "the other side", "one end", "the other end", and the like are based on the positional relationships shown in the drawings; the terms "first," "second," and the like are used herein to distinguish one structural element from another. These terms are merely for convenience in describing the present invention and for simplicity in description, and are not to be construed as limiting the present invention.
As shown in fig. 1, a defrosting method in an embodiment includes:
s100: acquiring a first environment temperature of an environment where an internal unit is located; specifically, a first ambient temperature of the environment in which the internal machine is located may be detected by a temperature sensor or a corresponding temperature acquisition module or a temperature bulb.
: when the first environment temperature is detected to reach the preset temperature, the water side heat exchanger is controlled to convey water to the water storage device for water storage; specifically, can judge whether first ambient temperature reaches and predetermine the temperature through corresponding judging module, when first ambient temperature reaches and predetermines the temperature, carry water to water storage device through control module control water side heat exchanger and impound, this moment, because the unit is in the mode of heating, therefore water storage device is used for holding hot water. It should be noted that the preset temperature is equal to the target heating temperature or slightly less than the target heating temperature, and the specific value is set as required.
: and controlling the water storage device to convey water to the air side heat exchanger for defrosting when the unit meets the defrosting requirement. Specifically, whether the unit meets the defrosting requirement or not can be judged through the corresponding judging module, and if the unit meets the defrosting requirement, the water storage device can be controlled by the control module to convey water to the air side heat exchanger for defrosting.
When the defrosting method is used, the first environment temperature of the environment where the indoor unit is located is detected, and when the first environment temperature is detected to reach the preset temperature, the water side heat exchanger is controlled to convey water to the water storage device, and because the water side heat exchanger is currently in a heating mode, the water conveyed to the indoor unit by the water side heat exchanger is hot water at the moment; when detecting the unit and reaching the requirement of changing the frost, control water storage device and carry water to wind side heat exchanger and change the frost, so, change the frost to wind side heat exchanger through the hot water in the water storage device, and then can reduce the influence to indoor comfort level, promote the experience sense that the user used.
On the basis of the above embodiment, the defrosting requirements include: the set time t1 when the unit reaches the target heating temperature is less than or equal to the actual accumulated running time t2 of the compressor when the target heating temperature is reached; the actual defrosting temperature of the unit is less than or equal to the defrosting set temperature of the unit; in a first preset time period, the set water inlet temperature of the internal machine is less than or equal to the actual water inlet temperature of the internal machine; and the requirement that the low pressure of the unit is less than or equal to the set low pressure of the unit is also met. When the judging module judges that the unit meets all the requirements, the unit can be determined to be required to be subjected to defrosting treatment, and then the wind side heat exchanger is accurately subjected to defrosting treatment.
Specifically, the actual accumulated operation time t2 of the compressor when the target heating temperature is reached may be monitored by the corresponding time monitoring module, and whether the set time t1 when the unit reaches the target heating temperature is less than or equal to the actual accumulated operation time t2 of the compressor when the target heating temperature is reached may be determined by the determining module.
Specifically, the actual defrosting temperature of the unit (evaporator) can be monitored through a temperature sensor or a temperature bulb, and whether the actual defrosting temperature of the unit is less than or equal to the defrosting set temperature of the unit is judged through a judgment module.
Specifically, the actual water inlet temperature of the internal machine can be monitored through the temperature sensor or the temperature sensing bulb within a first preset time period, and whether the set water inlet temperature of the internal machine is smaller than or equal to the actual water inlet temperature of the internal machine or not is judged through the judging module. The set inlet water temperature of the internal machine refers to the water temperature required when the internal machine reaches the target heating temperature.
As shown in fig. 2, further, in this embodiment, after the step of detecting that the unit meets the defrosting requirement and controlling the water storage device to deliver water to the air-side heat exchanger for defrosting, the method further includes:
t100, acquiring water temperature difference △ T before and after defrosting of the water storage device;
specifically, the water temperature of the water storage device before and after defrosting can be detected by the temperature sensor or the corresponding temperature acquisition module, and the difference between the two is calculated by the corresponding calculation module to obtain the water temperature difference △ T of the water storage device before and after defrosting.
When detecting that △ T is greater than or equal to a first preset value, reducing the value of set time T1 when the unit reaches the target heating temperature and increasing the value of set time T3 for continuous defrosting;
specifically, whether △ T is greater than or equal to a first preset value or not can be judged through the judgment module, when △ T is detected to be greater than or equal to the first preset value, it is shown that the temperature difference of water in the water storage device before and after defrosting is large, the set time T1 when the unit reaches the target heating temperature can be reduced through the controller, meanwhile, the value of the set time T3 for continuous defrosting is increased, and defrosting efficiency is improved.
When △ T is detected to be less than or equal to the second preset value, the value of the set time T1 is increased, and the value of the set time T3 for continuously defrosting is reduced.
Specifically, whether △ T is smaller than a second preset value or not can be judged through the judgment module, when △ T is detected to be smaller than the second preset value, it is indicated that the temperature difference of water in the water storage device before and after defrosting is smaller, the set time T1 when the unit reaches the target heating temperature can be increased through the controller, meanwhile, the value of the set time T3 for continuous defrosting is reduced, and unit loss is reduced.
On the basis of the above embodiment, the method for determining the first preset value includes:
acquiring the water temperature T1 of a water storage device before defrosting;
specifically, the water temperature T1 of the water storage device before defrosting can be obtained through a temperature sensor or a corresponding temperature obtaining module.
The first water temperature limiting coefficient α is preset, and the first preset value is output according to the product of T1 and α. in the embodiment, the first preset value is α T1, wherein the first water temperature limiting coefficient is related to the ambient humidity of the environment where the outdoor unit is located.
Further, in the present embodiment, the method for determining the first water temperature limiting coefficient α includes:
acquiring first humidity of an environment where an outdoor unit is located;
specifically, the first humidity may be obtained by measuring an ambient dry bulb temperature tsry 1 and measuring an ambient wet bulb temperature tswet 1, △ T1= tswet 1-tswet 1, by a relationship between a difference △ T1 between the dry bulb temperature tsdry 1 and the wet bulb temperature tswet 1 and the first humidity.
Presetting a first humidity revision coefficient and a first temperature revision coefficient, and outputting a first preset value according to the product of the first temperature revision coefficient and the acquired water temperature T1 of the water storage device before defrosting and the product of the first humidity revision coefficient and the first humidity.
Specifically, the accuracy of the first preset value is improved through the preset dry bulb temperature Tdry 1 and the measured environment wet bulb temperature Twet 1, wherein the first water temperature limiting coefficient α = aT1+ d △ T1+ c, a is a first temperature revision coefficient, d is a first humidity revision coefficient, and c is a water temperature revision constant.
Further, in this embodiment, the method for determining the second preset value includes:
acquiring the water temperature T2 of the water storage device after defrosting;
specifically, the water temperature T2 of the water storage device after defrosting can be obtained through a temperature sensor or a corresponding temperature obtaining module.
In the embodiment, the second preset value is β T2, wherein the second water temperature limiting coefficient is related to the ambient humidity of the environment where the outdoor unit is located, and thus, the accuracy of determining the second preset value is improved by setting the second water temperature limiting coefficient β and considering the humidity factor.
Further, in this embodiment, the method for determining the second water temperature limiting coefficient β includes:
acquiring second humidity of the environment where the outdoor unit is located;
specifically, the second humidity may be obtained by measuring an ambient dry bulb temperature tbry 2 and an ambient wet bulb temperature tbun 2, △ T2= tbun 2-tbun 2, by a relationship between a difference between the dry bulb temperature tbun 2 and the wet bulb temperature tbun 2 and the second humidity.
And presetting a second humidity revision coefficient and a second temperature revision coefficient, and outputting a second preset value according to the product of the second temperature revision coefficient and the acquired water temperature T1 of the water storage device before defrosting and the product of the second humidity revision coefficient and humidity.
And the accuracy of the second preset value is improved and calculated through the preset dry bulb temperature Tdry 2 and the measured environment wet bulb temperature Twet 2, wherein the second water temperature limiting coefficient β = eT1+ f △ T2+ c, e is a second temperature revision coefficient, f is a second humidity revision coefficient, and c is a water temperature revision constant, and the second water temperature limiting coefficient β can be accurately obtained through the relational expression.
Further, on the basis of any one of the above embodiments, when it is detected that the unit meets the defrosting requirement, the step of controlling the water storage device to deliver water to the air side heat exchanger for defrosting includes:
stopping the water side heat exchanger from conveying water to the internal machine when the unit is detected to meet the defrosting requirement;
specifically, can judge whether the unit reaches the requirement of changing the frost through corresponding judgement module, reach the requirement of changing the frost when detecting the unit, control the valve that water side heat exchanger carried water to the inner machine through the controller, stop the hydrologic cycle of inner machine, and then avoid causing great influence to indoor temperature, promote the travelling comfort that the user used.
And controlling the water storage device to convey water to the wind side heat exchanger.
On the basis of any one of the above embodiments, after detecting that the unit meets the defrosting requirement, the method further comprises the following steps of controlling the water storage device to convey water to the wind side heat exchanger for defrosting:
and when the unit is detected to meet the requirement of exiting the defrosting mode, controlling the water storage device to stop conveying water to the air side heat exchanger. Specifically, when the judging module judges that the unit meets the requirement of exiting the defrosting mode, the controller controls to close a valve of the water storage device for conveying water to the wind side heat exchanger, and the unit exits the defrosting mode.
Further, in this embodiment, the requirement for exiting the defrosting mode includes: the actual defrosting temperature of the unit is greater than or equal to the set temperature of the unit at the end of defrosting; or the set time t3 for continuous defrosting is less than or equal to the actual defrosting duration; or in a second preset time period, the set outlet water temperature at the tail end of the unit is greater than or equal to the actual outlet water temperature at the tail end of the unit; or the set high-pressure of the unit is less than or equal to the actual high-pressure of the unit. Therefore, when any one of the conditions is met, the unit defrosting is finished, and the defrosting mode needs to be exited.
Specifically, the actual defrosting temperature of the unit can be detected through the temperature sensor or the corresponding temperature acquisition module, and whether the actual defrosting temperature of the unit is greater than or equal to the set temperature for defrosting completion of the unit is judged through the judgment module.
Specifically, the actual defrosting duration time can be monitored through the time monitoring module, and whether the set time t3 for continuous defrosting is less than or equal to the actual defrosting duration time or not can be judged through the judging module.
Specifically, the actual water inlet temperature of the internal unit of the module can be obtained through the temperature sensing bulb or the temperature sensor or the corresponding temperature in the second preset time period, and whether the set water outlet temperature at the tail end of the unit is larger than or equal to the actual water outlet temperature at the tail end of the unit in the second preset time period is judged through the judging module. The set outlet water temperature at the tail end of the unit refers to the set outlet water temperature when the water returns from the internal unit to the water-side heat exchanger when the target heating temperature is reached. The actual outlet water temperature at the tail end of the unit refers to the actual outlet water temperature when the inner machine returns water to the water side heat exchanger.
Specifically, the actual high-pressure on the high-pressure side of the unit can be measured through the pressure sensor, and whether the set high-pressure of the unit is smaller than or equal to the actual high-pressure of the unit is judged through the judgment module.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It should be understood that although the steps in the flowcharts of fig. 1 and 2 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1 and 2 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
On the other hand, an air conditioner 10 in an embodiment includes: the heat exchange structure can provide a refrigeration mode and a heating mode and comprises a water side heat exchanger 100 and a wind side heat exchanger 700; the water inlet end of the inner machine 200 is communicated with the water outlet end of the water side heat exchanger 100; the temperature sensor 500, the temperature sensor 500 is used for measuring a first environment temperature of the environment where the indoor unit 200 is located; a water inlet end of the water storage device 300 is communicated with a water outlet end of the water-side heat exchanger 100 through a first pipeline, and a water outlet end of the water storage device 300 is communicated with a water inlet end of the water-side heat exchanger 100 through a second pipeline; a first cut-off valve 410, the first cut-off valve 410 being provided to the first pipe; a second cut-off valve 420, the second cut-off valve 420 being provided to the second pipe; the monitoring unit is used for monitoring whether the unit meets the defrosting requirement or not; and a controller in communication with the temperature sensor 500, the first stop valve 410, the second stop valve 420, and the monitor.
When the air conditioner 10 is in use, the water is delivered to the indoor unit 200 through the water-side heat exchanger 100 to perform heat exchange and temperature rise in the room, the first ambient temperature in the room is detected through the temperature sensor 500, and when the first ambient temperature reaches a preset range, the controller controls the first stop valve 410 and the second stop valve 420 to be opened, so that water is stored in the water storage device 300 through the water-side heat exchanger 100; when the monitor monitors that the unit reaches the defrosting requirement, water is delivered to the wind side heat exchanger 700 through the water storage device 300 to defrost, so that the influence on the indoor comfort level can be reduced, and the experience of the user is improved.
It is to be noted that the controller may be a single chip or a micro control unit. The monitoring unit can be a monitor, and the monitor comprises various modules for detecting whether the unit meets the defrosting requirement.
As shown in fig. 3, the air conditioner includes at least one indoor unit 200, a temperature sensor 500 and a terminal water temperature bulb 600 are disposed on the indoor unit 200, a first ambient temperature of an environment where the indoor unit 200 is located is measured by the ambient temperature bulb 500, and a water temperature of the indoor unit 200 returning water to the water side heat exchanger is measured by the terminal water temperature bulb 600. Set up third cut-off valve 430 on the pipeline of connecting interior machine 200 and water side heat exchanger 100, when changing the frost, can close third cut-off valve 430 and prevent water side heat exchanger 100 from carrying water to interior machine 200, and then can reduce the influence to indoor comfort level, promote the experience that the user used and feel.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A defrosting method characterized by comprising:
acquiring a first environment temperature of an environment where an internal unit is located;
when the first environment temperature is detected to reach the preset temperature, controlling the water side heat exchanger to convey water to the water storage device for water storage;
when the unit is detected to meet the defrosting requirement, controlling the water storage device to convey water to the air side heat exchanger for defrosting;
acquiring a water temperature difference △ T before and after defrosting of the water storage device;
when △ T is detected to be greater than or equal to a first preset value, the set time T when the unit reaches the target heating temperature is reduced1And the set time t of continuous defrosting is increased3The value of (d);
when △ T is detected to be less than or equal to a second preset value, the set time T is increased1And the set time t for continuous defrosting is reduced3The numerical value of (c).
2. The defrosting method according to claim 1, wherein the defrosting requirement includes:
set time t when unit reaches target heating temperature1Less than or equal to the actual accumulated running time t of the compressor when the target heating temperature is reached2(ii) a And is
The actual defrosting temperature of the unit is less than or equal to the defrosting set temperature of the unit; and is
In a first preset time period, the set water inlet temperature of the internal machine is less than or equal to the actual water inlet temperature of the internal machine.
3. The defrosting method according to claim 2, wherein the determination method of the first preset value comprises:
acquiring the water temperature T of the water storage device before defrosting1；
Presetting a first water temperature limiting coefficient α according to T1And α outputs a first preset value.
4. The defrosting method of claim 3, wherein the determination of the first water temperature limiting coefficient α comprises:
acquiring first humidity of an environment where an outdoor unit is located;
presetting a first humidity revision coefficient and a first temperature revision coefficient, and acquiring the water temperature T of the water storage device before defrosting according to the first temperature revision coefficient1And the product of the first humidity revision coefficient and the first humidity output the first preset value.
5. The defrosting method according to claim 2, wherein the second preset value is determined by a method comprising:
obtaining the water temperature T of the water storage device after defrosting2；
Presetting a second water temperature limiting coefficient β according to T2And β outputs a second preset value.
6. The defrosting method of claim 5, wherein the determination of the second water temperature limiting coefficient β comprises:
acquiring second humidity of the environment where the outdoor unit is located;
presetting a second humidity revision coefficient and a second temperature revision coefficient, and acquiring the water temperature T of the water storage device before defrosting according to the second temperature revision coefficient1And the product of the second humidity revision coefficient and the product of the humidity and the second preset value is output.
7. The defrosting method according to claim 1, wherein the step of controlling the water storage device to deliver water to the air side heat exchanger for defrosting when the unit is detected to meet the defrosting requirement comprises the following steps:
stopping the water side heat exchanger from conveying water to the internal machine when the unit is detected to meet the defrosting requirement;
and controlling the water storage device to convey water to the air side heat exchanger.
8. The defrosting method according to any one of claims 1 to 7, wherein after detecting that the unit meets the defrosting requirement and controlling the water storage device to convey water to the wind-side heat exchanger for defrosting, the defrosting method further comprises the following steps:
and when the unit is detected to meet the requirement of exiting the defrosting mode, controlling the water storage control device to stop conveying water to the air side heat exchanger.
9. The defrosting method of claim 8 wherein the requirement to exit the defrosting mode comprises:
the actual defrosting temperature of the unit is greater than or equal to the defrosting ending set temperature of the unit; or
Setting time t for continuous defrosting3Less than or equal to the actual defrosting duration; or
In a second preset time period, the set outlet water temperature at the tail end of the unit is greater than or equal to the actual outlet water temperature at the tail end of the unit; or
The set high pressure of the unit is less than or equal to the actual high pressure of the unit.
10. An air conditioner to which the defrosting method of any one of claims 1 to 9 is applied, comprising:
the heat exchange structure comprises a water side heat exchanger and an air side heat exchanger;
the water outlet end of the water side heat exchanger is communicated with the water inlet end of the inner machine;
the temperature sensor is used for measuring a first environment temperature of the environment where the internal machine is located;
the water inlet end of the water storage device is communicated with the water outlet end of the water side heat exchanger through a first pipeline, and the water outlet end of the water storage device is communicated with the water inlet end of the water side heat exchanger through a second pipeline;
a first shut-off valve disposed in the first conduit;
a second shut-off valve disposed in the second conduit;
the monitoring unit is used for monitoring whether the unit meets the defrosting requirement or not; and
a controller in communication with the temperature sensor, the first stop valve, the second stop valve, and the monitor;
when the first environment temperature reaches a preset range, the controller controls the first stop valve and the second stop valve to be opened, and water is stored in the water storage device through the water side heat exchanger; when the monitoring unit monitors that the unit meets the defrosting requirement, water is conveyed to the air side heat exchanger through the water storage device to be defrosted.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000213834A (en) * | 1999-01-20 | 2000-08-02 | Fujitsu General Ltd | Air conditioner |
| KR100835328B1 (en) * | 2007-01-29 | 2008-06-04 | 윤문중 | Apparatus for defrosting in heating and cooling boiler |
| JP2010054068A (en) * | 2008-08-26 | 2010-03-11 | Daikin Ind Ltd | Heating system |
| JP2010144938A (en) * | 2008-12-16 | 2010-07-01 | Mitsubishi Electric Corp | Heat pump water heater and method for operating the same |
| JP2011094864A (en) * | 2009-10-29 | 2011-05-12 | Panasonic Corp | Air conditioner |
| JP2012172869A (en) * | 2011-02-18 | 2012-09-10 | Enaatekku Kk | Heat pump device |
| JP2013119954A (en) * | 2011-12-06 | 2013-06-17 | Panasonic Corp | Heat pump hot water heater |
| KR20130115001A (en) * | 2012-04-10 | 2013-10-21 | (주)그린이엔티 | Apparatus for preheating of heat-source air in air heat-source heat pump |
| CN103344040B (en) * | 2013-06-25 | 2016-03-30 | 广东美的暖通设备有限公司 | Teat pump boiler and defrosting control method thereof |
| CN105091435B (en) * | 2014-05-13 | 2018-09-18 | 珠海格力电器股份有限公司 | Defrosting control method |
| CN205448434U (en) * | 2016-03-15 | 2016-08-10 | 广东美的制冷设备有限公司 | Adopt hot water to carry out air conditioner that defrosts |
| CN105674644A (en) * | 2016-03-28 | 2016-06-15 | 珠海格力电器股份有限公司 | Air conditioner and defrosting method thereof |
| EP3244141A1 (en) * | 2016-05-09 | 2017-11-15 | Vaillant GmbH | Defrosting with heat generated by compressor driver |
| CN205747589U (en) * | 2016-05-16 | 2016-11-30 | 叶立英 | A kind of heat-exchange system and there is the heat pump of defrosting function |
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