CN109539401B - Air conditioner and control method - Google Patents
Air conditioner and control method Download PDFInfo
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- CN109539401B CN109539401B CN201811347665.4A CN201811347665A CN109539401B CN 109539401 B CN109539401 B CN 109539401B CN 201811347665 A CN201811347665 A CN 201811347665A CN 109539401 B CN109539401 B CN 109539401B
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- compressor
- heat
- heat transmission
- switch
- bypass
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate outdoor units
- F24F1/10—Arrangement or mounting thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application provides an air conditioner and a control method, and relates to the technical field of air conditioning equipment. The compressor is provided with a suction end and a discharge end, one end of the heat transmission bypass is connected with the suction end of the compressor, the other end of the heat transmission bypass is connected with the discharge end of the compressor, and the heat transmission bypass is used for transmitting heat of the discharge end of the compressor to the suction end of the compressor; and a switch component is arranged on the heat transmission bypass, and the on or off of the heat transmission bypass is controlled by the switch component. The heat of the discharge end of the compressor can be transferred to the suction end of the compressor through the heat transfer bypass. When the superheat degree of the air suction end of the air conditioner compressor is insufficient, the heat generated by the air discharge end of the compressor can be transferred to the air suction port side of the compressor by opening the heat transmission bypass, the refrigerant at the air suction port side is preheated, and the reliability of the compressor is improved.
Description
Technical Field
The application relates to the technical field of air conditioning equipment, in particular to an air conditioner and a control method.
Background
The air conditioning thermal cycle process includes: the gaseous refrigerant is compressed by a compressor and then discharged into a high-temperature high-pressure gaseous refrigerant; the high-temperature high-pressure gaseous refrigerant is liquefied and released at the condenser of the indoor unit to form a liquid refrigerant; the liquid refrigerant flows to an evaporator of the outdoor unit through the throttling device and is gasified and absorbed in the evaporator; the gaseous refrigerant flowing out of the evaporator flows to the compressor to complete circulation.
In the outside low temperature environment, in the heating operation process of the existing air conditioning system, the following technical problems exist: the temperature of the suction end of the air conditioner compressor is insufficient, and the refrigerant enters the compressor, so that the compressor can operate unreliably. In addition, in order to improve indoor temperature in the outside low-temperature environment, the exhaust pressure of the air conditioner needs to be improved, higher frequency is needed, and noise is easy to cause.
Disclosure of Invention
The application aims to solve the technical problem of insufficient superheat degree of an air suction end of a compressor in the air-conditioning low-temperature heating process in the prior art, and provides an air conditioner and a control method for effectively preheating refrigerants at an air suction end of the compressor and improving the reliability of the compressor.
In a first aspect, an embodiment of the present application provides an air conditioner, including a compressor and a heat transfer bypass, where the compressor has a suction end and a discharge end, one end of the heat transfer bypass is connected to the suction end of the compressor, the other end of the heat transfer bypass is connected to the discharge end of the compressor, and the heat transfer bypass is used to transfer heat from the discharge end of the compressor to the suction end of the compressor;
and a switch component is arranged on the heat transmission bypass, and the on or off of the heat transmission bypass is controlled by the switch component.
Further, in a preferred embodiment of the present application, the switch assembly is a thermal switch.
Further, in a preferred embodiment of the present application, the thermal switch includes a first heat conducting member, a second heat conducting member, and a switch shutter, wherein the switch shutter is made of a thermal sensitive material; the switch brake pad is arranged on the first heat conduction component, and the second heat conduction component is connected with the switch brake pad;
the switch brake pad can deform in a preset temperature range to realize connection or disconnection of the second heat conduction component and the first heat conduction component so as to control on-off of the heat transmission bypass.
Further, in a preferred embodiment of the present application, the heat transfer bypass further includes a heat transfer member, one end of the heat transfer member is connected to the exhaust pipe of the compressor discharge end, and the other end of the heat transfer member is connected to the suction pipe of the compressor suction end through the switch assembly.
Further, in a preferred embodiment of the present application, the heat transfer member comprises at least one heat pipe.
Further, in a preferred embodiment of the present application, the present application further includes a controller and a temperature sensor, and the switch assembly is an electric control switch, and the electric control switch is electrically connected to the controller.
Further, in a preferred embodiment of the present application, the present application further includes a condensing device, a throttling device, and an evaporating device, where the exhaust end of the compressor, the condensing device, the throttling device, the evaporating device, and the suction end of the compressor are sequentially connected and form a loop.
In a second aspect, an embodiment of the present application provides an air conditioner control method, including the steps of:
detecting an ambient temperature T1;
comparing the ambient temperature T1 with a first temperature threshold Ta:
if T1 is less than or equal to Ta, the switch assembly is opened, a heat transmission bypass is communicated, and the heat transmission bypass transmits heat of the exhaust end of the compressor to the suction end of the compressor;
if T1 > Ta, the switch assembly is closed and the heat transfer bypass is closed.
Further, in a preferred embodiment of the present application, the method further comprises the steps of: the ambient temperature T1 is measured with a temperature sensor.
According to the air conditioner and the control method provided by the embodiment of the application, the heat of the exhaust end of the compressor can be transferred to the suction end of the compressor through the arranged heat transfer bypass. When the temperature of the air suction end of the air conditioner compressor is insufficient, the heat of the compressed high-temperature high-pressure gaseous refrigerant can be transferred to the air suction port side of the compressor by opening the heat transfer bypass, the refrigerant at the air suction port side is preheated, the temperature of the refrigerant at the air suction port side of the compressor is increased, the superheat degree of the air suction end of the air conditioner compressor is increased, and complete gasification of the refrigerant is ensured. And the preheated refrigerant enters the compressor to be subjected to main heating circulation for heating, so that the reliability of the compressor is improved, and the running life of the compressor is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an air conditioner according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a thermal switch according to an embodiment of the present application.
Reference numerals:
1 compressor 2 heat transfer bypass 3 condensing equipment 4 throttling equipment 5 evaporating equipment
11 exhaust pipe 12 suction pipe 21 heat-sensitive switch 211 first heat-conducting component
212 the second heat conduction member 213 switches the heat transmission member of the shutter 22
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an air conditioner according to an embodiment of the present application, and as shown in fig. 1, the air conditioner provided by the present application includes a compressor 1, a heat transfer bypass 2, a condensing device 3, a throttling device 4, and an evaporating device 5, where the compressor 1 has a suction end and a discharge end, and the discharge end of the compressor 1, the condensing device 3, the throttling device 4, the evaporating device 5, and the suction end of the compressor 1 are sequentially connected and form a main loop of an air conditioning cycle.
As shown in fig. 1, one end of the heat transfer bypass 2 is communicated with the suction end of the compressor 1, the other end of the heat transfer bypass 2 is communicated with the discharge end of the compressor 1, and the heat transfer bypass 2 is used for transferring heat of the discharge end of the compressor 1 to the suction end of the compressor 1; the heat transmission bypass 2 is provided with a switch component, and the on or off of the heat transmission bypass 2 is controlled by the switch component. By providing the heat transfer bypass 2, heat at the discharge end of the compressor 1 can be transferred to the suction end of the compressor 1. When the temperature of the air suction end of the air conditioner compressor 1 is insufficient, the heat of the compressed part of high-temperature high-pressure gaseous refrigerant can be transferred to the air suction port side of the compressor 1 by opening the heat transfer bypass 2, the refrigerant at the air suction port side is preheated, the temperature of the refrigerant at the air suction port side of the compressor 1 is increased, the superheat degree of the air suction end of the air conditioner compressor 1 is increased, and the complete gasification of the refrigerant is ensured. The preheated refrigerant enters the compressor 1 again to carry out main heating circulation for heating, so that the reliability of the compressor 1 is improved, and the operation life of the compressor 1 is prolonged.
In addition, when the air conditioner in the prior art is used in an external low-temperature environment, if the air conditioner is required to effectively heat the room, the exhaust pressure of the compressor 1 needs to be increased, and the frequency of the air conditioner needs to be high, so that a serious noise problem can be generated, and meanwhile, if the air conditioner is required to be prevented from running at a high frequency, the heating capacity of the air conditioner in the low-temperature environment can be limited. The technical problems of the frequency and the superheat degree are particularly remarkable in the air conditioner adopting the capillary tube. The discharge pressure and heating temperature of the compressor 1 cannot be raised to be high to enhance indoor heating effect due to the limitation of frequency and noise. In the technical scheme of adopting the heat transmission bypass 2, heat generated after the refrigerant is compressed by the compressor 1 is transmitted to the air suction port of the compressor 1 through the heat transmission bypass 2, the refrigerant of the air suction port is preheated and then discharged after being compressed by the compressor 1, the effect of double-stage compression is realized, the exhaust temperature and the exhaust pressure of the compressor 1 are improved, and therefore, the temperature of the indoor side refrigerant is improved, the indoor side heat exchange rate is improved, and the heating capacity is improved.
In order to effectively utilize the heat transfer bypass 2, in the air conditioner according to the embodiment of the present application, the switch component is a heat-sensitive switch 21. The thermal switch 21 is related to the outside ambient temperature, and when the outside ambient temperature is high (higher than-10 ℃), the thermal switch 21 is in the off state, and the heat transfer bypass 2 is not conducted and does not transfer heat. The outside environment temperature is reduced (lower than-10 ℃), the heating effect needs to be improved, the thermal switch 21 is in an open state, the heat transmission bypass 2 is conducted, and the refrigerant at the suction end of the compressor 1 is preheated; the heating effect is improved without considering the frequency limitation problem of the compressor 1.
Specifically, fig. 2 is a schematic structural diagram of a thermal switch 21 according to an embodiment of the present application, and as shown in fig. 2, an embodiment of the present application provides a specific thermal switch 21 structure, where the thermal switch 21 includes a first heat conductive member 211, a second heat conductive member 212, and a switch shutter 213, and the switch shutter 213 is made of a thermally deformable metal made of a heat-sensitive material; the switch brake pad 213 is disposed on the first heat conducting member 211, and the second heat conducting member 212 is connected to the switch brake pad 213; the switch shutter 213 is capable of being deformed in a preset temperature range to connect or disconnect the second heat conducting member 212 and the first heat conducting member 211, so as to control the on-off state of the heat transfer bypass 2. The first heat conductive member 211 and the second heat conductive member 212 are heat conductive pipes made of a high heat conductive material.
As shown in fig. 2, in the present embodiment, when the outside temperature is high (higher than-10 ℃), the thermal deformation degree of the switch shutter 213 is large, so that the second heat conduction member 212 and the first heat conduction member 211 are in a non-connection state, the thermal switch 21 is turned off, the heat transmission bypass 2 is not turned on, and no heat transmission is performed. When the outside temperature is low (lower than-10 ℃), the thermal deformation degree of the switch shutter 213 is small, so that the second heat conduction member 212 and the first heat conduction member 211 are in a connection state, the thermal switch 21 is opened, the heat transfer bypass 2 is conducted, and heat transfer is performed.
In this embodiment, as shown in fig. 2, the heat transmission bypass 2 further includes a heat transmission component 22, one end of the heat transmission component 22 is connected to the exhaust pipe 11 at the exhaust end of the compressor 1, and the other end of the heat transmission component 22 is connected to the suction pipe 12 at the suction end of the compressor 1 through the switch assembly. The heat transfer part 22 includes at least one heat pipe that transfers heat to the first heat conductive part 211.
In the air conditioner provided by the other embodiment of the application, the air conditioner further comprises a controller and a temperature sensor, wherein the switch component is an electric control switch, and the electric control switch is electrically connected with the controller. The temperature sensor in this embodiment is installed on the air conditioner and used for measuring the outdoor environment temperature, and an independent temperature sensor and a pressure sensor can be further arranged at the air suction end of the compressor 1 and used for measuring the temperature and the pressure of the air suction end and monitoring the superheat degree of the air suction end. The temperature signal measured by the temperature sensor is transmitted to the controller, and the controller issues a control instruction for controlling the electric control switch to be opened or closed according to the temperature signal. For example, the outdoor temperature is lower than-10 ℃, the controller controls the electric control switch to be turned on, and the heat transmission bypass 2 is conducted to preheat the refrigerant at the suction end.
Another embodiment of the present application provides an air conditioner control method, including the following steps:
detecting an ambient temperature T1;
comparing the ambient temperature T1 with the first temperature threshold Ta, in this embodiment Ta may be-10deg.C:
if T1 is less than or equal to-10 ℃, the switch assembly is opened, the heat transmission bypass 2 is communicated, and the heat transmission bypass 2 transmits heat of the exhaust end of the compressor 1 to the suction end of the compressor 1;
if T1 > -10 ℃, the switch assembly is closed and the heat transfer bypass 2 is closed.
In the technical scheme of adopting the electric control switch and the controller, the other embodiment of the application can also ensure that the heat transmission bypass 2 is opened when needed by taking the superheat degree as an auxiliary index outside the ambient temperature. The air conditioner control method further comprises the steps of measuring the temperature and the pressure of the refrigerant at the air suction end through a temperature sensor and a pressure sensor arranged at the air suction end, transmitting signals to a controller, and calculating the superheat degree of the air suction end according to the temperature information and the pressure information, namely, the saturation temperature (the state that the refrigerant is changed from a liquid phase to a gas phase) corresponding to the low-pressure state of the refrigerant. The heat transfer bypass 2 may not be opened at a superheat of 0-2 deg.c.
In the description of the present application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, that is, the corresponding orientations when the air conditioner is normally installed. It is used merely for convenience in describing the application and to simplify the description and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (5)
1. An air conditioner is characterized by comprising a compressor (1) and a heat transmission bypass (2), wherein the compressor (1) is provided with a suction end and a discharge end, one end of the heat transmission bypass (2) is connected with the suction end of the compressor (1), the other end of the heat transmission bypass (2) is connected with the discharge end of the compressor (1), and the heat transmission bypass (2) is used for transmitting heat of the discharge end of the compressor (1) to the suction end of the compressor (1);
the heat transmission bypass (2) is provided with a switch assembly, the on or off of the heat transmission bypass (2) is controlled through the switch assembly, the switch assembly is a thermal switch (21), the thermal switch (21) comprises a first heat conduction component (211), a second heat conduction component (212) and a switch brake pad (213), and the switch brake pad (213) is made of a thermal sensitive material; the switch brake pad (213) is arranged on the first heat conduction component (211), and the second heat conduction component (212) is connected with the switch brake pad (213);
the switch brake pad (213) can be deformed in a preset temperature range to realize that the second heat conduction component (212) is connected with or disconnected from the first heat conduction component (211) so as to control the on-off of the heat transmission bypass (2), the heat transmission bypass (2) further comprises a heat transmission component (22), one end of the heat transmission component (22) is connected with an exhaust pipe (11) at the exhaust end of the compressor (1), the other end of the heat transmission component (22) is connected with an air suction pipe (12) at the air suction end of the compressor (1) through the switch assembly, and the heat transmission component (22) comprises at least one heat pipe.
2. The air conditioner of claim 1, further comprising a controller and a temperature sensor, wherein the switch assembly is an electronically controlled switch, and wherein the electronically controlled switch is electrically connected to the controller.
3. The air conditioner according to claim 1, further comprising a condensing device (3), a throttling device (4) and an evaporating device (5), wherein the exhaust end of the compressor (1), the condensing device (3), the throttling device (4), the evaporating device (5) and the suction end of the compressor (1) are sequentially connected and form a loop.
4. An air conditioner control method for controlling the air conditioner according to any one of claims 1 to 3, comprising the steps of:
detecting an ambient temperature T1;
comparing the ambient temperature T1 with a first temperature threshold Ta:
if T1 is less than or equal to Ta, the switch assembly is opened, the heat transmission bypass (2) is communicated, and the heat transmission bypass (2) transmits heat of the exhaust end of the compressor (1) to the suction end of the compressor (1);
if T1 > Ta, the switch assembly is closed and the heat transfer bypass (2) is closed.
5. The control method according to claim 4, characterized by further comprising the step of: the ambient temperature T1 is measured with a temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347665.4A CN109539401B (en) | 2018-11-13 | 2018-11-13 | Air conditioner and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347665.4A CN109539401B (en) | 2018-11-13 | 2018-11-13 | Air conditioner and control method |
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| Publication Number | Publication Date |
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| CN109539401A CN109539401A (en) | 2019-03-29 |
| CN109539401B true CN109539401B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811347665.4A Active CN109539401B (en) | 2018-11-13 | 2018-11-13 | Air conditioner and control method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111664541A (en) * | 2020-06-19 | 2020-09-15 | 宁波奥克斯电气股份有限公司 | Air conditioner and control method thereof |
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| CN109539401A (en) | 2019-03-29 |
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