CN103791561A - Air conditioner indoor unit - Google Patents
Air conditioner indoor unit Download PDFInfo
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- CN103791561A CN103791561A CN201410056575.5A CN201410056575A CN103791561A CN 103791561 A CN103791561 A CN 103791561A CN 201410056575 A CN201410056575 A CN 201410056575A CN 103791561 A CN103791561 A CN 103791561A
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Abstract
The invention discloses an air conditioner indoor unit. Each evaporator is provided with a temperature monitoring system connected with a control system of an expansion valve in a communication mode. A protection state entering temperature value and a working state entering temperature value are set for the temperature monitoring systems in advance, the temperature monitoring systems compare a monitored refrigerant temperature value with the temperature values set in advance, and when the monitored refrigerant temperature value is larger than or equal to the protection state entering temperature value, the temperature monitoring systems send signals to the control systems of the expansion valves, and the expansion valves are closed; when the monitored refrigerant temperature value is larger than or equal to the working state entering temperature value, the temperature monitoring systems send signals to the control systems of the expansion valves, and the expansion valves are opened. In this way, the temperature monitoring systems are used for monitoring the refrigerant temperature of the evaporators and sending the corresponding signals to the control systems of the expansion valves so that the expansion valves can be opened or closed, and the evaporators can be effectively protected in an anti-freezing mode.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to a kind of indoor apparatus of air conditioner.
Background technology
Split-type air conditioner is divided into indoor set and off-premises station, and wherein, indoor set comprises the relevant device compositions such as liquid pipe, evaporimeter.
In use, occur that because evaporator fin is dirty, return air is bad, fan delivery is too low etc. evaporator temperature is too low, long-play can cause that evaporimeter freezes, the full fault of indoor set water and leak, system returns the phenomenons such as liquid, finally can cause evaporimeter to damage.
The technology that prevents at present the heat exchanger bursting by freezing of indoor set is normally carried out anti-frost protection according to the pressure of refrigerant, and by utilizing monitoring system to carry out the monitoring of pressure, in the time that actual force value reaches the minimum pressure values that monitoring system sets, compressor cuts out; In the time that actual force value reaches the maximum pressure value that monitoring system sets, compressor is opened.
But, refrigerant has under certain pressure there being corresponding temperature, in actual use procedure, due to the kind of refrigerant and the difference of the concrete service condition of refrigeration system, can cause refrigerant under identical pressure, actual temperature does not conform to the temperature under perfect condition, determines its temperature by the pressure of monitoring refrigerant, easily there is error, and affect the normal use of refrigeration system; Also be not easy to monitoring system to set minimum pressure values and maximum pressure value, if force value arranges the too high or too low normal use that all can affect refrigeration system simultaneously.
Summary of the invention
The object of this invention is to provide a kind of indoor apparatus of air conditioner, be convenient to monitoring, can effectively carry out anti-frost protection to evaporimeter.
The invention provides a kind of indoor apparatus of air conditioner, comprise evaporimeter, blower fan and expansion valve, described evaporimeter is provided with the control system of described expansion valve and communicates the temperature monitoring system being connected, described temperature monitoring system has set in advance and has entered guard mode temperature value and duty temperature value, temperature monitoring system compares monitored refrigerant temperature value and predefined temperature value, described in being more than or equal to, the refrigerant temperature value of monitoring enters guard mode temperature value, described temperature monitoring system sends signal to the control system of described expansion valve, described expansion valve cuts out, the refrigerant temperature value of monitoring is more than or equal to described duty temperature value, and described temperature monitoring system sends signal to the control system of described expansion valve, and described expansion valve is opened.
Preferably, described temperature monitoring system also comprises time supervision system, and described time supervision system is for monitoring the duration of refrigerant temperature; What described temperature monitoring system set in advance enters guard mode temperature value is 0 ℃, and the predefined duration of time supervision system is 30 minutes, and described expansion valve cuts out; What described temperature monitoring system set in advance enters duty temperature value is 8 ℃, and described expansion valve is opened.
Preferably, what described temperature monitoring system set in advance enter guard mode temperature value is-3 ℃, and the predefined duration of time supervision system is 8 minutes, and described expansion valve cuts out.
Preferably, described temperature monitoring system comprises evaporimeter middle part temperature monitoring system and evaporator outlet temperature monitoring system, and described evaporimeter middle part temperature monitoring system and/or described evaporator outlet temperature monitoring system are sent signal to described expansion valve control system.
Preferably, described evaporimeter middle part monitoring system comprises the first temperature sensor, and described the first temperature sensor is arranged at the minimum point of described evaporimeter medium position; Described evaporator outlet temperature monitoring system comprises the second temperature sensor, and described the second temperature sensor is arranged at the general export position of described evaporimeter.
Preferably, described indoor apparatus of air conditioner comprises at least two group operational systems, and operational system is arranged in parallel described at least two groups, and is provided with evaporimeter, blower fan and expansion valve.
A kind of indoor apparatus of air conditioner provided by the present invention, comprise evaporimeter, blower fan and expansion valve, evaporimeter is provided with the control system of expansion valve and communicates the temperature monitoring system being connected, temperature monitoring system has set in advance and has entered guard mode temperature value and duty temperature value, temperature monitoring system compares monitored refrigerant temperature value and predefined temperature value, the refrigerant temperature value of monitoring is more than or equal to and enters guard mode temperature value, temperature monitoring system sends signal to the control system of expansion valve, and expansion valve cuts out; The refrigerant temperature value of monitoring is more than or equal to duty temperature value, and temperature monitoring system sends signal to the control system of expansion valve, and described expansion valve is opened.So, by utilizing temperature monitoring system the refrigerant temperature of evaporimeter is monitored and sent corresponding control signal to the control system of expansion valve, to control the start and stop of expansion valve.Due to refrigerant temperature detect agility and reliability high, can effectively carry out anti-frost protection to evaporimeter.
Accompanying drawing explanation
Fig. 1 is the structural representation of indoor apparatus of air conditioner in a kind of specific embodiment provided by the present invention;
Wherein, as in 1:
Evaporimeter 1, expansion valve 2, blower fan 3, the first temperature sensor 4, the second temperature sensor 5, indoor environment temperature sensor 6.
The specific embodiment
Core of the present invention is to provide a kind of indoor apparatus of air conditioner, is convenient to monitoring, can effectively carry out anti-frost protection to evaporimeter.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, Fig. 1 is the structural representation of indoor apparatus of air conditioner in a kind of specific embodiment provided by the present invention.
In this specific embodiment, indoor apparatus of air conditioner comprises two operational systems, these two operational systems are arranged in parallel, and these two operational systems include evaporimeter 1, blower fan 3 and expansion valve 2, wherein, evaporimeter 1 in each operational system is provided with the control system of expansion valve and communicates the temperature monitoring system being connected, temperature monitoring system has set in advance and has entered guard mode temperature value and duty temperature value, temperature monitoring system compares monitored refrigerant temperature value and predefined temperature value, described in being more than or equal to, the refrigerant temperature value of monitoring enters guard mode temperature value, temperature monitoring system sends signal to the control system of expansion valve, expansion valve 2 cuts out, the refrigerant temperature value of monitoring is more than or equal to described duty temperature value, and temperature monitoring system sends signal to the control system of expansion valve, and expansion valve 2 is opened.
So, by utilizing temperature monitoring system the refrigerant temperature of evaporimeter 1 is monitored and sent corresponding control signal to the control system of expansion valve, to control the start and stop of expansion valve 2.Due to refrigerant temperature detect agility and reliability high, can effectively carry out anti-frost protection to evaporimeter 1.
It should be noted that, in this specific embodiment, be only provided with two operational systems that are arranged in parallel, certainly, also do not get rid of the operational system that other quantity are set, as 1 or three, four etc. are only set.
In this specific embodiment, also comprise time supervision system, can monitor the duration of refrigerant temperature by time supervision system, further to guarantee expansion valve 2 accuracy of actions.What temperature monitoring system set in advance enters guard mode temperature value is 0 ℃, the predefined duration of time supervision system is 30 minutes, when monitoring refrigerant temperature, temperature monitoring system is less than or equal to 0 ℃, time supervision system monitoring to duration of this temperature for being more than or equal to 30 minutes, temperature monitoring system sends signal to the control system of expansion valve, expansion valve 2 cuts out, blower fan 3 moves according to air supply pattern, and the energy requirement of the operational system at this evaporimeter 1 place is passed to off-premises station, off-premises station reduces output or out of service according to the energy aggregate demand situation of all indoor sets, what temperature monitoring system set in advance enters duty temperature value is 8 ℃, when monitoring refrigerant temperature, temperature monitoring system is less than or equal to 8 ℃, time supervision system monitoring to duration of this temperature for being more than or equal to 8 minutes, temperature monitoring system sends signal to the control system of expansion valve, expansion valve 2 is opened, and off-premises station raises and exports or open operation according to the energy aggregate demand situation of all indoor sets.So, can further guarantee evaporimeter 1 to carry out anti-freeze protection, avoid evaporimeter 1 to freeze and cause bursting by freezing.
In addition; in order further to avoid evaporimeter 1 frosting; what temperature monitoring system set in advance enter, and guard mode temperature value can also be-3 ℃; when monitoring refrigerant temperature, temperature monitoring system is less than or equal to-3 ℃; time supervision system monitoring to duration of this temperature for being more than or equal to 8 minutes; temperature monitoring system sends signal to the control system of expansion valve, and expansion valve 2 cuts out.
It should be noted that, in this specific embodiment, the predefined guard mode temperature value that enters of temperature monitoring system, take evaporimeter 1 frost-free as 1 boundary's point.、
Also it should be noted that, in this specific embodiment, expansion valve 2 is electric expansion valve.
In addition, in order further to guarantee the accuracy that temperature value is measured, in this specific embodiment, also comprise evaporimeter middle part temperature monitoring system and evaporator outlet temperature monitoring system, wherein, evaporimeter middle part temperature monitoring system comprises that the first temperature sensor 4, the first temperature sensors 4 are arranged at the minimum point of evaporimeter medium position, in order to monitor the minimum temperature of evaporimeter 1 middle part temperature; Evaporator outlet temperature monitoring system comprises that the second temperature sensor 5, the second temperature sensors 5 are arranged at the general export position of evaporimeter 1, for monitoring the refrigerant temperature of evaporimeter 1 exit position.
So; reach predefined and enter guard mode temperature or enter running status temperature when evaporimeter middle part temperature monitoring system and/or evaporator outlet temperature monitoring system monitor refrigerant temperature; and the duration of this temperature reaches the duration that time supervision system sets; temperature monitoring system can send control signal to the control system of expansion valve, and expansion valve 2 stops according to signal or opens.
In further scheme, indoor apparatus of air conditioner also comprises indoor environment temperature sensor 6, indoor environment temperature sensor 6 communicates and is connected with air-conditioner outdoor unit, so, the energy that air-conditioner outdoor unit can be carried to indoor apparatus of air conditioner according to indoor environment temperature control, to guarantee stability and the comfortableness of indoor environment temperature.
Above a kind of indoor apparatus of air conditioner provided by the present invention is described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (6)
1. an indoor apparatus of air conditioner, comprise evaporimeter (1), blower fan (3) and expansion valve (2), it is characterized in that, described evaporimeter (1) is provided with the control system of described expansion valve and communicates the temperature monitoring system being connected, described temperature monitoring system has set in advance and has entered guard mode temperature value and duty temperature value, temperature monitoring system compares monitored refrigerant temperature value and predefined temperature value, described in being more than or equal to, the refrigerant temperature value of monitoring enters guard mode temperature value, described temperature monitoring system sends signal to the control system of described expansion valve, described expansion valve (2) cuts out, the refrigerant temperature value of monitoring is more than or equal to described duty temperature value, and described temperature monitoring system sends signal to the control system of described expansion valve, and described expansion valve (2) is opened.
2. indoor apparatus of air conditioner according to claim 1, is characterized in that, described temperature monitoring system also comprises time supervision system, and described time supervision system is for monitoring the duration of refrigerant temperature;
What described temperature monitoring system set in advance enters guard mode temperature value is 0 ℃, and the predefined duration of time supervision system is 30 minutes, and described expansion valve (2) cuts out; What described temperature monitoring system set in advance enters duty temperature value is 8 ℃, and described expansion valve (2) is opened.
3. indoor apparatus of air conditioner according to claim 2, is characterized in that, what described temperature monitoring system set in advance enter guard mode temperature value is-3 ℃, and the predefined duration of time supervision system is 8 minutes, and described expansion valve (2) cuts out.
4. according to the indoor apparatus of air conditioner described in arbitrary of claims 1 to 3, it is characterized in that, described temperature monitoring system comprises evaporimeter middle part temperature monitoring system and evaporator outlet temperature monitoring system, and described evaporimeter middle part temperature monitoring system and/or described evaporator outlet temperature monitoring system are sent signal to the control system of described expansion valve.
5. indoor apparatus of air conditioner according to claim 1, is characterized in that, described evaporimeter middle part monitoring system comprises the first temperature sensor (4), and described the first temperature sensor (4) is arranged at the minimum point of described evaporimeter (1) medium position; Described evaporator outlet temperature monitoring system comprises the second temperature sensor (5), and described the second temperature sensor (5) is arranged at the general export position of described evaporimeter (1).
6. indoor apparatus of air conditioner according to claim 1, it is characterized in that, described indoor apparatus of air conditioner comprises at least two group operational systems, and operational system is arranged in parallel described at least two groups, and is provided with described evaporimeter (1), described blower fan (3) and described expansion valve (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410056575.5A CN103791561B (en) | 2014-02-19 | 2014-02-19 | A kind of indoor apparatus of air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410056575.5A CN103791561B (en) | 2014-02-19 | 2014-02-19 | A kind of indoor apparatus of air conditioner |
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| CN103791561A true CN103791561A (en) | 2014-05-14 |
| CN103791561B CN103791561B (en) | 2016-05-11 |
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| CN201410056575.5A Active CN103791561B (en) | 2014-02-19 | 2014-02-19 | A kind of indoor apparatus of air conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288205A (en) * | 2016-08-19 | 2017-01-04 | 芜湖美智空调设备有限公司 | Air-conditioner and control method thereof |
| CN106288544A (en) * | 2016-08-19 | 2017-01-04 | 芜湖美智空调设备有限公司 | Air-conditioner and control method thereof |
| CN110017542A (en) * | 2019-04-17 | 2019-07-16 | 广东美的制冷设备有限公司 | Air conditioner, anti-freeze control method and computer readable storage medium |
| CN111520797A (en) * | 2020-05-25 | 2020-08-11 | 广东志高暖通设备股份有限公司 | Floor heating multi-split air conditioner with anti-freezing monitoring function and anti-freezing control method thereof |
| CN113531773A (en) * | 2021-06-18 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner fault detection method and device and multi-connected air conditioner |
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| CN1098186A (en) * | 1993-03-29 | 1995-02-01 | 三洋电机株式会社 | The control device of air conditioner |
| CN1389675A (en) * | 2002-07-18 | 2003-01-08 | 上海交通大学 | Heat-comfortable fuzzily controlled air conditioner |
| US20040134206A1 (en) * | 2003-01-13 | 2004-07-15 | Lg Electronics Inc. | Apparatus and method for controlling operation of air conditioner |
| WO2012052019A1 (en) * | 2010-10-20 | 2012-04-26 | Danfoss A/S | A method for controlling a supply of refrigerant to an evaporator |
| JP2013124800A (en) * | 2011-12-14 | 2013-06-24 | Panasonic Corp | Refrigerating cycle device |
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2014
- 2014-02-19 CN CN201410056575.5A patent/CN103791561B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098186A (en) * | 1993-03-29 | 1995-02-01 | 三洋电机株式会社 | The control device of air conditioner |
| CN1389675A (en) * | 2002-07-18 | 2003-01-08 | 上海交通大学 | Heat-comfortable fuzzily controlled air conditioner |
| US20040134206A1 (en) * | 2003-01-13 | 2004-07-15 | Lg Electronics Inc. | Apparatus and method for controlling operation of air conditioner |
| WO2012052019A1 (en) * | 2010-10-20 | 2012-04-26 | Danfoss A/S | A method for controlling a supply of refrigerant to an evaporator |
| JP2013124800A (en) * | 2011-12-14 | 2013-06-24 | Panasonic Corp | Refrigerating cycle device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288205A (en) * | 2016-08-19 | 2017-01-04 | 芜湖美智空调设备有限公司 | Air-conditioner and control method thereof |
| CN106288544A (en) * | 2016-08-19 | 2017-01-04 | 芜湖美智空调设备有限公司 | Air-conditioner and control method thereof |
| CN110017542A (en) * | 2019-04-17 | 2019-07-16 | 广东美的制冷设备有限公司 | Air conditioner, anti-freeze control method and computer readable storage medium |
| CN111520797A (en) * | 2020-05-25 | 2020-08-11 | 广东志高暖通设备股份有限公司 | Floor heating multi-split air conditioner with anti-freezing monitoring function and anti-freezing control method thereof |
| CN113531773A (en) * | 2021-06-18 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner fault detection method and device and multi-connected air conditioner |
| CN113531773B (en) * | 2021-06-18 | 2022-11-15 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner fault detection method and device and multi-connected air conditioner |
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| CN103791561B (en) | 2016-05-11 |
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Address after: 528200 No. 1 compiled by the villagers' group of helangsha, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee after: Guangdong Kaili HVAC Co.,Ltd. Address before: 528200 No. 1 compiled by the villagers' group of helangsha, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG CHIGO HEATING AND VENTILATION EQUIPMENT Co.,Ltd. |