CN112902488A - Defrosting control method of heat pump system and heat pump system thereof - Google Patents
Defrosting control method of heat pump system and heat pump system thereof Download PDFInfo
- Publication number
- CN112902488A CN112902488A CN202110178592.6A CN202110178592A CN112902488A CN 112902488 A CN112902488 A CN 112902488A CN 202110178592 A CN202110178592 A CN 202110178592A CN 112902488 A CN112902488 A CN 112902488A
- Authority
- CN
- China
- Prior art keywords
- defrosting
- pump system
- heat pump
- heat exchanger
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
Abstract
The invention provides a defrosting control method of a heat pump system, wherein an auxiliary heater is added in the heat pump system, and the auxiliary heater is arranged on one side of an indoor heat exchanger of the heat pump system; when the heat pump system enters a defrosting program, a four-way reversing valve of the heat pump system keeps the direction in a heating state, meanwhile, the threshold value of a throttling device is increased, and the defrosting program is carried out after an auxiliary heater is started; the heat is brought to one side of the heat exchanger of the outdoor unit of the heat pump system by the auxiliary heat exchanger to defrost the heat exchanger of the auxiliary outdoor unit. The defrosting control method can solve the problems of large indoor temperature fluctuation and poor comfort in the defrosting process; the problem of bad defrosting effect, which causes bad influence on the performance of the air conditioner, is solved; the auxiliary heater brings heat to the outdoor unit to optimize the defrosting process, and the second throttling device, the electromagnetic bypass device and the like are not needed to be arranged to simplify the system structure, so that the heating operation is kept in the defrosting process, and the comprehensive energy efficiency of the heat pump system is further improved.
Description
Technical Field
The invention belongs to the technical field of heat pump air conditioners, and particularly relates to a defrosting control method of a heat pump system and the heat pump system.
Background
When the heat pump air conditioner is operated for heating, when the temperature of the outdoor heat exchanger is lower than the dew point temperature of the humid air and the temperature of the outdoor heat exchanger is lower than 0 ℃, water vapor in the air is condensed into a frost layer on the surface of the outdoor heat exchanger. The frost layer will increase the thermal resistance of the outdoor heat exchanger, so that the heating amount is attenuated.
In the prior art, when the outdoor side needs defrosting, the four-way valve reverses to defrost, and a high-temperature refrigerant flows through the outdoor heat exchanger to defrost, however, in a low-temperature high-humidity heating environment, because the frosting frequency of the outdoor heat exchanger is high, the defrosting frequency is also high, the frosting period is short when an air conditioner operates, the indoor continuous heating time is short, and the heating comfort is poor. Patent 201910344928.4 proposes a control method of heat pump system, which can effectively improve the indoor thermal comfort by increasing the opening degree of the throttling device, but if the maximum opening degree of the throttling device is not large enough, the defrosting effect of the outer machine is not good, and the air-out comfort of the inner machine is affected.
Therefore, no corresponding solution has been proposed for a control method for optimizing the defrosting process.
Disclosure of Invention
In view of the above, the invention provides a defrosting control method for a heat pump system, in which an auxiliary heater is added in the heat pump system, and the auxiliary heater is arranged on one side of an indoor heat exchanger of the heat pump system; when the heat pump system enters a defrosting program, a four-way reversing valve of the heat pump system keeps the direction in a heating state, meanwhile, the threshold value of a throttling device is increased, and the defrosting program is carried out after an auxiliary heater is started; the heat is brought to one side of the heat exchanger of the outdoor unit of the heat pump system by the auxiliary heat exchanger to defrost the heat exchanger of the auxiliary outdoor unit. The defrosting control method can solve the problems of large indoor temperature fluctuation and poor comfort in the defrosting process; the problem of bad defrosting effect, which causes bad influence on the performance of the air conditioner, is solved; the auxiliary heater brings heat to the outdoor unit to optimize the defrosting process, and the second throttling device, the electromagnetic bypass device and the like are not needed to be arranged to simplify the system structure, so that the heating operation is kept in the defrosting process, and the comprehensive energy efficiency of the heat pump system is further improved.
Optionally, the defrosting control method adjusts the defrosting rate by adjusting the output power of the auxiliary heater.
Optionally, the defrosting control method uses a temperature sensor to respectively monitor the temperature of the pipe wall of the outdoor heat exchanger and the temperature of the pipe wall of the indoor heat exchanger of the heat pump system;
judging whether the heat pump system enters a defrosting procedure or not according to the temperature of the tube wall of the outdoor side heat exchanger;
and judging the output power of the auxiliary heater in the defrosting process according to the tube wall temperature of the indoor side heat exchanger.
Optionally, the auxiliary heater uses electric heating, electromagnetic heating and heats by power regulation.
Optionally, in the defrosting process, the auxiliary heater is turned off when the temperature of the tube wall of the indoor side heat exchanger is detected to be greater than or equal to a preset temperature value.
Optionally, the control process of the defrosting control method includes determining whether to enter a defrosting procedure through temperature detection; when entering a defrosting procedure, the four-way reversing valve keeps the direction in a heating state and controls the throttling device to be opened to a maximum threshold value; and opening the auxiliary heater for defrosting, and adjusting the defrosting rate according to the output power of the auxiliary heater adjusted by the temperature of the indoor heat exchanger.
Further, the invention also provides a heat pump system which adopts the defrosting control method.
Optionally, the heat pump system comprises a compressor, an indoor side heat exchanger, an outdoor side heat exchanger, a throttling device, a four-way reversing valve and an auxiliary heat exchanger; the auxiliary heater is kept in an open state in the defrosting process and is kept in a closed state when the heat pump system is in heating operation.
Optionally, the defrosting process of the heat pump system comprises:
(1) acquiring operating parameters of a heat pump system;
(2) detecting and judging whether a defrosting condition is reached;
(3) when the defrosting condition is achieved, the throttling device is controlled to be opened to the maximum threshold value, and meanwhile, the four-way reversing valve does not reverse;
(4) defrosting and starting an auxiliary heater at the same time;
(5) and regulating the defrosting rate according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger by regulating the output power of the auxiliary heater until defrosting is finished.
The defrosting control method can solve the problems of large indoor temperature fluctuation and poor comfort in the defrosting process; the problem of bad defrosting effect, which causes bad influence on the performance of the air conditioner, is solved; the auxiliary heater brings heat to the outdoor unit to optimize the defrosting process, and the second throttling device, the electromagnetic bypass device and the like are not needed to be arranged to simplify the system structure, so that the heating operation is kept in the defrosting process, and the comprehensive energy efficiency of the heat pump system is further improved.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above-described benefits simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used for describing the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1: the embodiment of the heat pump system of the invention has a schematic cycle structure;
FIG. 2: a flow chart of a control process of an embodiment of the heat pump system of the present invention when executing a defrosting procedure;
in the drawings, the components, structures and devices represented by the respective symbols are as follows:
1-a compressor;
a 2-four-way reversing valve;
3-outdoor side heat exchanger;
4-a capillary device;
5-a throttling device;
6-indoor side heat exchanger;
7-auxiliary heat device;
tout-outdoor heat exchanger tube wall temperature;
tin-the wall temperature of the heat exchanger tube of the indoor unit.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.
It will be understood that, although the terms first, second, etc. may be used herein to describe various structures, these structures should not be limited by these terms. These terms are used to distinguish one structure from another structure. Thus, a first structure discussed below may be termed a second structure without departing from the teachings of the disclosed concept. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It is to be understood by those skilled in the art that the drawings are merely schematic representations of exemplary embodiments, and that the blocks or processes shown in the drawings are not necessarily required to practice the present disclosure and are, therefore, not intended to limit the scope of the present disclosure.
The following detailed description of embodiments of the invention is provided in conjunction with the accompanying drawings:
the embodiment provides a control flow of a defrosting control method of a heat pump system, which comprises the steps of firstly, adding an auxiliary heat device in the heat pump system, wherein the auxiliary heat device is arranged on one side of an indoor heat exchanger of the heat pump system; when the heat pump system enters a defrosting program, a four-way reversing valve of the heat pump system keeps the direction in a heating state, meanwhile, the threshold value of a throttling device is increased, and the defrosting program is carried out after an auxiliary heater is started; the heat is brought to one side of the heat exchanger of the outdoor unit of the heat pump system by the auxiliary heat exchanger to defrost the heat exchanger of the auxiliary outdoor unit.
Preferably, the defrosting control method uses a temperature sensor to respectively monitor the temperature of the pipe wall of the outdoor heat exchanger and the temperature of the pipe wall of the indoor heat exchanger of the heat pump system; in this embodiment, the tube wall temperature of the outdoor heat exchanger is set to Tout, and correspondingly, the tube wall temperature of the indoor heat exchanger is set to Tin.
Judging whether the heat pump system enters a defrosting procedure or not according to the temperature of the tube wall of the outdoor side heat exchanger;
and judging the output power of the auxiliary heater in the defrosting process according to the tube wall temperature of the indoor side heat exchanger.
Preferably, the auxiliary heater uses electric heating, electromagnetic heating and heats by power regulation.
Preferably, in the defrosting process, the auxiliary heater is closed when the pipe wall temperature Tin of the indoor side heat exchanger is detected to be greater than or equal to the preset temperature value T. The preset temperature value T is an overheating protection temperature value, and overload work of the heat pump system is avoided.
Further, in the defrosting process, the auxiliary heater adjusts the output power according to the tube wall temperature Tin of the indoor side heat exchanger so as to adjust the heating quantity;
when detecting that Tin is more than or equal to T, temporarily using the pipe wall as an auxiliary heat device to prevent the phenomenon of protective shutdown caused by overhigh pipe temperature and high pressure of high pressure side;
if Tin is less than T, the electric auxiliary heat is continuously started and adjusted until defrosting is finished.
Preferably, as shown in fig. 2, the control process of the defrosting control method includes determining whether to enter a defrosting procedure through temperature detection; when entering a defrosting procedure, the four-way reversing valve keeps the direction in a heating state and controls the throttling device to be opened to a maximum threshold value; and opening the auxiliary heater for defrosting, and adjusting the defrosting rate according to the output power of the auxiliary heater adjusted by the temperature of the indoor heat exchanger.
Further, as shown in fig. 1, the invention also provides a heat pump system, which adopts the defrosting control method.
Preferably, the heat pump system comprises a compressor 1, a four-way reversing valve 2, an outdoor side heat exchanger 3, a throttling device 5, an indoor side heat exchanger 6 and an auxiliary heat exchanger 7; the auxiliary heater is kept in an open state in the defrosting process and is kept in a closed state when the heat pump system is in heating operation.
Furthermore, the auxiliary heat exchanger is arranged between the indoor secondary heat exchanger and the air duct; in order to ensure the fluctuation of indoor temperature during defrosting, the auxiliary heater is immediately started when defrosting is carried out, and the auxiliary heater adjusts power according to the temperature fluctuation condition in the defrosting process so as to adjust the heating quantity; once the defrosting procedure is exited, the auxiliary heater is simultaneously turned off.
Preferably, as shown in fig. 2, the defrosting process of the heat pump system includes:
(1) acquiring operating parameters of a heat pump system;
(2) detecting and judging whether a defrosting condition is reached;
(3) when the defrosting condition is achieved, the throttling device is controlled to be opened to the maximum threshold value, and meanwhile, the four-way reversing valve does not reverse;
(4) defrosting and starting an auxiliary heater at the same time;
(5) and regulating the defrosting rate according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger by regulating the output power of the auxiliary heater until defrosting is finished.
The defrosting control method can solve the problems of large indoor temperature fluctuation and poor comfort in the defrosting process; the problem of bad defrosting effect, which causes bad influence on the performance of the air conditioner, is solved; the auxiliary heater brings heat to the outdoor unit to optimize the defrosting process, and the second throttling device, the electromagnetic bypass device and the like are not needed to be arranged to simplify the system structure, so that the heating operation is kept in the defrosting process, and the comprehensive energy efficiency of the heat pump system is further improved.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiment or embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. A defrosting control method of a heat pump system is characterized by comprising the following steps:
adding an auxiliary heat device in the heat pump system, wherein the auxiliary heat device is arranged on one side of an indoor heat exchanger of the heat pump system;
when the heat pump system enters a defrosting program, a four-way reversing valve of the heat pump system keeps the direction in a heating state, meanwhile, the threshold value of a throttling device is increased, and the defrosting program is carried out after an auxiliary heater is started;
the heat is brought to one side of the heat exchanger of the outdoor unit of the heat pump system by the auxiliary heat exchanger to defrost the heat exchanger of the auxiliary outdoor unit.
2. The defrosting control method of a heat pump system according to claim 1, characterized in that: the defrosting control method adjusts the defrosting rate by adjusting the output power of the auxiliary heater.
3. The defrosting control method of the heat pump system according to claim 2, wherein:
the defrosting control method comprises the steps of respectively monitoring the temperature of the pipe wall of an outdoor heat exchanger and the temperature of the pipe wall of an indoor heat exchanger of a heat pump system by using temperature sensors;
judging whether the heat pump system enters a defrosting procedure or not according to the temperature of the tube wall of the outdoor side heat exchanger;
and judging the output power of the auxiliary heater in the defrosting process according to the tube wall temperature of the indoor side heat exchanger.
4. The defrosting control method of the heat pump system according to claim 3, wherein: the auxiliary heater adopts an electric heating mode and an electromagnetic heating mode and adjusts the heating quantity through power.
5. The defrosting control method of the heat pump system according to claim 4, wherein:
and in the defrosting process, the auxiliary heater is closed when the temperature of the tube wall of the indoor side heat exchanger is detected to be greater than or equal to a preset temperature value.
6. The defrosting control method of the heat pump system according to claim 4, wherein: the control process of the defrosting control method comprises the steps of judging whether a defrosting program is started or not through temperature detection; when entering a defrosting procedure, the four-way reversing valve keeps the direction in a heating state and controls the throttling device to be opened to a maximum threshold value; and opening the auxiliary heater for defrosting, and adjusting the defrosting rate according to the output power of the auxiliary heater adjusted by the temperature of the indoor heat exchanger.
7. A heat pump system characterized by employing the defrosting control method of the heat pump system according to any one of claims 1 to 6.
8. The heat pump system of claim 7, wherein: the heat pump system comprises a compressor, an indoor side heat exchanger, an outdoor side heat exchanger, a throttling device, a four-way reversing valve and an auxiliary heat exchanger; the auxiliary heater is kept in an open state in a defrosting process and is kept in a closed state when the heat pump system is in heating operation.
9. The heat pump system of claim 8, wherein:
the defrosting process comprises the following steps:
acquiring operating parameters of a heat pump system;
detecting and judging whether a defrosting condition is reached;
when the defrosting condition is achieved, the throttling device is controlled to be opened to the maximum threshold value, and meanwhile, the four-way reversing valve does not reverse;
defrosting and starting an auxiliary heater at the same time;
and regulating the defrosting rate according to the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger by regulating the output power of the auxiliary heater until defrosting is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110178592.6A CN112902488A (en) | 2021-02-09 | 2021-02-09 | Defrosting control method of heat pump system and heat pump system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110178592.6A CN112902488A (en) | 2021-02-09 | 2021-02-09 | Defrosting control method of heat pump system and heat pump system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112902488A true CN112902488A (en) | 2021-06-04 |
Family
ID=76123184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110178592.6A Pending CN112902488A (en) | 2021-02-09 | 2021-02-09 | Defrosting control method of heat pump system and heat pump system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112902488A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011153789A (en) * | 2010-01-28 | 2011-08-11 | Denso Corp | Refrigerating cycle device |
| CN104061651A (en) * | 2013-03-20 | 2014-09-24 | 珠海格力电器股份有限公司 | Multi-unit air conditioner, multi-unit defrosting control system and multi-unit defrosting control method |
| CN106705304A (en) * | 2017-01-10 | 2017-05-24 | 美的集团武汉制冷设备有限公司 | Air conditioner and defrosting control method of air conditioner |
| US20190063793A1 (en) * | 2016-11-07 | 2019-02-28 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Multi-split system and liquid return prevention control method thereof during defrosting of multi-split system |
| CN110260493A (en) * | 2019-07-03 | 2019-09-20 | 芜湖美智空调设备有限公司 | Progress control method and control device, air conditioner and computer readable storage medium |
| CN111503821A (en) * | 2020-04-29 | 2020-08-07 | 广东美的制冷设备有限公司 | Control method of air conditioner |
-
2021
- 2021-02-09 CN CN202110178592.6A patent/CN112902488A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011153789A (en) * | 2010-01-28 | 2011-08-11 | Denso Corp | Refrigerating cycle device |
| CN104061651A (en) * | 2013-03-20 | 2014-09-24 | 珠海格力电器股份有限公司 | Multi-unit air conditioner, multi-unit defrosting control system and multi-unit defrosting control method |
| US20190063793A1 (en) * | 2016-11-07 | 2019-02-28 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Multi-split system and liquid return prevention control method thereof during defrosting of multi-split system |
| CN106705304A (en) * | 2017-01-10 | 2017-05-24 | 美的集团武汉制冷设备有限公司 | Air conditioner and defrosting control method of air conditioner |
| CN110260493A (en) * | 2019-07-03 | 2019-09-20 | 芜湖美智空调设备有限公司 | Progress control method and control device, air conditioner and computer readable storage medium |
| CN111503821A (en) * | 2020-04-29 | 2020-08-07 | 广东美的制冷设备有限公司 | Control method of air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106958926B (en) | Air conditioner and defrosting control method thereof | |
| CN103388856B (en) | Multi-online air-conditioning system and start heating method fast | |
| CN100580346C (en) | Air-conditioner defrosting method | |
| CN101975422B (en) | Warm/cool air-conditioner and defrosting method thereof | |
| CN107514683A (en) | Air conditioner and its indoor set automatically cleaning control method | |
| CN108302651B (en) | Multi-split air conditioner outdoor unit system and defrosting method thereof | |
| CN103542459B (en) | Defrost method when cold-heat frequency-conversion air conditioner and heating operation | |
| CN103411290A (en) | Air conditioner and defrosting control method thereof | |
| CN108105942A (en) | Air conditioner and its Defrost method | |
| CN102116549B (en) | Method for defrosting of direct current variable frequency heat pump air conditioner | |
| CN103411341A (en) | Constant-temperature dehumidifying air conditioner and dehumidifying method | |
| CN104990321A (en) | Air conditioner and defrosting method thereof | |
| CN102226608B (en) | Air conditioner defrosting system, air conditioner and air conditioner defrosting method | |
| CN104729163A (en) | Air conditioning system and defrosting control method thereof | |
| CN103968503A (en) | Air conditioner outdoor unit, and defrosting method and device for air conditioner | |
| CN107575998A (en) | The defrosting control method of air-conditioning and its outdoor unit | |
| CN108692426B (en) | Defrosting control method for air conditioner | |
| CN103528188A (en) | Air source hot water machine system and control method thereof | |
| CN105571221A (en) | Air conditioner system and control method of air conditioner system | |
| CN110542149A (en) | defrosting control method for air conditioning system and air conditioning system | |
| CN104930770A (en) | Defrosting method and defrosting device of heat pump air conditioner | |
| CN108592297B (en) | Defrosting control method for air conditioner | |
| WO2019184408A1 (en) | Defrosting control method and control system for electrochemically refrigerative window-type air conditioner, and air conditioner | |
| JP2011202845A (en) | Air conditioner | |
| CN110887155A (en) | Automatic cleaning control method and device for air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210604 |