CN109357343B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- CN109357343B CN109357343B CN201811244887.3A CN201811244887A CN109357343B CN 109357343 B CN109357343 B CN 109357343B CN 201811244887 A CN201811244887 A CN 201811244887A CN 109357343 B CN109357343 B CN 109357343B
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- CN
- China
- Prior art keywords
- air conditioner
- temperature
- heat exchanger
- outdoor heat
- way valve
- 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.)
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Classifications
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners and aims to solve the problem that the existing air conditioner is poor in heating effect due to incomplete defrosting, so that user experience is poor. The air conditioner also comprises a temperature switch arranged on the outdoor heat exchanger, the temperature switch is connected with the four-way valve, the temperature switch is set to be capable of preventing the four-way valve from reversing when the temperature of the outdoor heat exchanger is less than or equal to a first preset temperature, and the temperature switch is also set to be capable of allowing the four-way valve to reverse when the temperature of the outdoor heat exchanger is greater than or equal to a second preset temperature. According to the invention, when the air conditioner is frequently powered off, the heating of the air conditioner is not influenced due to incomplete defrosting, the heating effect of the air conditioner is improved, the service life of the air conditioner is prolonged, and the user experience is improved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides an air conditioner.
Background
The air conditioner is a device capable of refrigerating and heating indoors, and in the process of heating the air conditioner, the indoor heat exchanger releases heat, the outdoor heat exchanger absorbs heat, and the temperature of a coil pipe of the outdoor heat exchanger is low, so that the surface of the outdoor heat exchanger frosts, and particularly in winter, the frosting phenomenon is very obvious.
In the prior art, the air conditioner is selectively enabled to enter a defrosting mode by detecting the temperature of a coil pipe of an indoor unit and the ambient temperature, however, the control method has the disadvantages that if the air conditioner is powered off under the condition that defrosting is not completed, and then the air conditioner is powered on again for a while, because the air conditioner determines whether defrosting is performed or not and needs a certain time, in the heating process, the surface of an outdoor heat exchanger is frosted continuously, so that the situation that defrosting cannot be completely performed all the time due to frequent power off can occur, and the heating effect of the air conditioner is poor, especially in public areas such as hotels and hotels, the situations are very many, and in the past, the heating effect of the air conditioner is poor, the service life of the air conditioner is reduced, and user experience is poor.
Therefore, there is a need in the art for a new air conditioner to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, i.e. to solve the problem that the prior air conditioner is easy to have poor heating effect due to incomplete defrosting, so that the user experience is poor, the invention provides an air conditioner, the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor, an electronic expansion valve and a four-way valve, wherein the outdoor heat exchanger, the compressor, the indoor heat exchanger and the electronic expansion valve form a closed-loop refrigerant circulating system, the four-way valve can be switched to enable the air conditioner to be in a refrigerating working condition or a heating working condition, the air conditioner further comprises a temperature switch arranged on the outdoor heat exchanger, the temperature switch is connected with the four-way valve, the temperature switch is set to be capable of preventing the four-way valve from being switched to enable the air conditioner to be in the refrigerating working condition when the temperature of the outdoor heat exchanger is smaller than or equal to a first preset temperature, and the temperature switch is also set to be capable of.
In the preferable technical scheme of the air conditioner, the temperature switch is connected with a live wire of the four-way valve.
In a preferred embodiment of the above air conditioner, the temperature switch is disposed on an outer surface of the outdoor heat exchanger.
In the preferable technical scheme of the air conditioner, the first preset temperature is 0 ℃.
In a preferred embodiment of the air conditioner, the second preset temperature is 4 ℃.
In the preferable technical scheme of the air conditioner, the compressor is a fixed-frequency compressor.
As can be understood by those skilled in the art, in the preferred technical scheme of the present invention, the temperature switch is arranged on the outdoor heat exchanger, when the temperature of the outdoor heat exchanger is too low, the temperature switch is always turned off to prevent the four-way valve from reversing, so that the air conditioner forcibly performs the refrigeration working condition, even if the power failure occurs during the defrosting process, the air conditioner forcibly performs the refrigeration working condition to defrost the outdoor heat exchanger as long as the temperature of the outdoor heat exchanger is too low during the startup, after the defrosting is completed, the temperature switch is turned on along with the gradual temperature rise of the outdoor heat exchanger, so that the reversing of the four-way valve is not limited, that is, the four-way valve is not prevented from reversing, and the air conditioner can reverse and heat. Through such setting for when the air conditioner takes place frequent outage, also can not influence the air conditioner because the defrosting is incomplete and heat, improve the effect of heating of air conditioner, improve the life of air conditioner, promote user experience.
Drawings
Fig. 1 is a schematic view of a connection structure of a temperature switch of an air conditioner according to the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that the terms "first" and "second" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides an air conditioner based on the problem that the prior air conditioner is poor in heating effect due to incomplete defrosting, so that the user experience is poor.
The air conditioner also comprises a temperature switch arranged on the outdoor heat exchanger, the temperature switch is connected with the four-way valve, the temperature switch is set to be capable of preventing the four-way valve from reversing when the temperature of the outdoor heat exchanger is less than or equal to a first preset temperature so that the air conditioner is in a refrigerating working condition, and the temperature switch is also set to be capable of allowing the four-way valve to reverse when the temperature of the outdoor heat exchanger is greater than or equal to a second preset temperature. Wherein, the temperature switch can adopt a temperature switch with a bimetallic strip as a temperature sensing element, when the air conditioner works normally, that is, when the outdoor heat exchanger of the air conditioner is not frosted, the bimetallic strip is in a free state, the contact of the bimetallic strip is in a closed state, at the moment, the reversing of the four-way valve is not limited by the temperature switch, when the temperature of the outdoor heat exchanger is reduced and reaches the first preset temperature, the outdoor heat exchanger of the air conditioner begins to frost, at this time, the bimetallic strip contracts when cooled and the contact of the bimetallic strip is in a disconnected state, so that the four-way valve cannot be reversed, the air conditioner is forced to execute a refrigeration working condition, under the refrigeration working condition, the indoor heat exchanger is used as an evaporator, the outdoor heat exchanger is used as a condenser, and the temperature of the condenser is increased, so that frost on the outdoor heat exchanger is quickly dissolved, and the purpose of defrosting is further achieved. The temperature switch generates stress change at a temperature point to change the contact state, which belongs to the prior art and is not described herein again. In the present invention, the compressor is preferably a fixed frequency compressor.
It should be noted that, in some plateau areas, that is, in areas with high altitude, the atmospheric pressure may be lower than the standard atmospheric pressure, and the freezing point temperature may change at this time, that is, lower than 0 degree celsius, in which case a person skilled in the art may adjust the first preset temperature according to an actual geographic area, and of course, the first preset temperature may also be set to be higher than the freezing point temperature (for example, higher than the freezing point temperature by 1 degree celsius), so that the advantage of the setting is that the outdoor heat exchanger may not be frosted when the temperature switch has a temperature sensing deviation, namely, when the outdoor heat exchanger has a frosting tendency, the four-way valve is prevented from reversing. Similarly, the second preset temperature can also be flexibly adjusted, and in a preferred embodiment, the local air pressure is taken as the standard atmospheric pressure, if the first preset temperature is 0 degrees celsius, the second preset temperature may be set to 4 degrees celsius, that is, when the temperature of the outdoor heat exchanger of the air conditioner reaches 0 ℃, in order to avoid frosting of the outdoor heat exchanger, the temperature switch needs to be disconnected at the moment to prevent the four-way valve from reversing, so that the four-way valve is kept at a position for the air conditioner to execute the refrigeration working condition, when the temperature of the outdoor heat exchanger reaches 4 ℃, the temperature of the outdoor heat exchanger is back raised, and can be determined as defrosting completely, at this time, the temperature switch can be closed to remove the reversing limitation of the four-way valve, and the air conditioner can reverse to heat or continue to refrigerate under the condition that a user needs refrigerating. In addition, it should be noted that, in the existing air conditioner, the default position of the four-way valve is the position for the air conditioner to execute the cooling working condition, if the air conditioner needs to heat, the four-way valve needs to be electrified to pull in the electromagnetic coil 2 of the four-way valve to realize the reversing, therefore, the temperature switch 1 can be connected with the live wire 3 of the four-way valve, as the structure shown in fig. 1, when the temperature switch 1 is disconnected, the four-way valve can not be electrified, so that the electromagnetic coil 2 of the four-way valve can not be pulled in, and the four-way valve can not be reversed, when the temperature switch 1 is closed, the reversing can be realized by electrifying the four-way valve, and the four-way valve can not be electrified and. Of course, if the default position of the four-way valve is the position for the air conditioner to execute the heating working condition, the temperature switch 1 is only required to be correspondingly adjusted, and details are not repeated here. This change in the default position of the four-way valve does not constitute any limitation on the present invention.
Preferably, the temperature switch is disposed on an outer surface of the outdoor heat exchanger. Since frosting is generally formed on the outer surface of the outdoor heat exchanger, the temperature switch is disposed on the outer surface of the outdoor heat exchanger, so that the temperature of the outdoor heat exchanger can be sensed more directly and accurately, and the temperature switch can be conveniently mounted.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (6)
1. An air conditioner is characterized by comprising an indoor heat exchanger, an outdoor heat exchanger, a compressor, an electronic expansion valve and a four-way valve, wherein the outdoor heat exchanger, the compressor, the indoor heat exchanger and the electronic expansion valve form a closed-loop refrigerant circulating system, the four-way valve can be reversed to enable the air conditioner to be in a refrigerating working condition or a heating working condition,
the air conditioner also comprises a temperature switch arranged on the outdoor heat exchanger, the temperature switch is connected with the four-way valve, the temperature switch is set to be capable of preventing the four-way valve from reversing when the temperature of the outdoor heat exchanger is less than or equal to a first preset temperature so as to enable the air conditioner to be in a refrigeration working condition, and the temperature switch is also set to be capable of allowing the four-way valve to reverse when the temperature of the outdoor heat exchanger is greater than or equal to a second preset temperature.
2. The air conditioner according to claim 1, wherein the temperature switch is connected to a live line of the four-way valve.
3. The air conditioner according to claim 1, wherein the temperature switch is provided on an outer surface of the outdoor heat exchanger.
4. The air conditioner according to claim 1, wherein the first preset temperature is 0 degrees celsius.
5. The air conditioner of claim 1, wherein the second predetermined temperature is 4 degrees celsius.
6. The air conditioner according to any one of claims 1 to 5, wherein the compressor is a fixed frequency compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811244887.3A CN109357343B (en) | 2018-10-24 | 2018-10-24 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811244887.3A CN109357343B (en) | 2018-10-24 | 2018-10-24 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109357343A CN109357343A (en) | 2019-02-19 |
| CN109357343B true CN109357343B (en) | 2021-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811244887.3A Active CN109357343B (en) | 2018-10-24 | 2018-10-24 | Air conditioner |
Country Status (1)
| Country | Link |
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| CN (1) | CN109357343B (en) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1826513B1 (en) * | 2005-07-26 | 2019-10-23 | Mitsubishi Electric Corporation | Refrigerating air conditioner |
| KR20090075279A (en) * | 2008-01-03 | 2009-07-08 | 주식회사 대우일렉트로닉스 | Method for controlling defrosting of refrigerator |
| JP5434460B2 (en) * | 2009-10-15 | 2014-03-05 | 三菱電機株式会社 | Heat pump equipment |
| JP5976576B2 (en) * | 2013-03-21 | 2016-08-23 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Air conditioner |
| JP5951541B2 (en) * | 2013-03-28 | 2016-07-13 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Refrigeration unit |
| EP3070417A4 (en) * | 2013-11-12 | 2017-09-27 | Mitsubishi Electric Corporation | Refrigeration system |
| JP6363972B2 (en) * | 2015-06-12 | 2018-07-25 | 株式会社デンソー | Air conditioner for vehicles |
| CN104990321B (en) * | 2015-06-30 | 2017-07-07 | 广东美的制冷设备有限公司 | A kind of air-conditioner and its defrosting method |
| CN105241143B (en) * | 2015-10-26 | 2017-11-10 | 广东美的暖通设备有限公司 | Air-cooled heat pump cold-hot water machine and its prevent high voltage protective method |
| CN105805976A (en) * | 2016-04-27 | 2016-07-27 | 广东美的暖通设备有限公司 | Air conditioner operation control method and device |
| JP2018066515A (en) * | 2016-10-20 | 2018-04-26 | 株式会社長府製作所 | Method of controlling heat pump hot water heating system |
| CN106440559A (en) * | 2016-11-29 | 2017-02-22 | 广东美的制冷设备有限公司 | Air-conditioner defrosting system and defrosting control method |
| CN108548281B (en) * | 2018-06-12 | 2020-06-26 | 海信（山东）空调有限公司 | Control method of air conditioner |
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2018
- 2018-10-24 CN CN201811244887.3A patent/CN109357343B/en active Active
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| CN109357343A (en) | 2019-02-19 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210604 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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