KR102037248B1 - Air conditioning system for automotive vehicles - Google Patents
Air conditioning system for automotive vehicles Download PDFInfo
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- KR102037248B1 KR102037248B1 KR1020140080716A KR20140080716A KR102037248B1 KR 102037248 B1 KR102037248 B1 KR 102037248B1 KR 1020140080716 A KR1020140080716 A KR 1020140080716A KR 20140080716 A KR20140080716 A KR 20140080716A KR 102037248 B1 KR102037248 B1 KR 102037248B1
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- evaporator
- temperature
- deviation
- icing
- sensing means
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Abstract
The present invention relates to a vehicle air conditioner, and by improving the control structure of the evaporator icing prevention device, it is possible to improve the icing prevention efficiency of the evaporator, thereby improving the cooling performance and the comfort in the vehicle interior. The purpose is to make sure.
In order to achieve this object, the present invention includes an evaporator for cooling the air blown into the cabin with the refrigerant supplied from the compressor, the evaporator is a surface portion of the evaporator in a vehicle air conditioner is controlled to a predetermined target temperature First and second temperature sensing means installed at a predetermined distance to a part of the evaporator so as to sense temperatures of two specific places having different temperature distributions; The reference temperature deviation for each target temperature of the evaporator is stored, and the temperature deviations of the two surface portions of the evaporator input by the first and second temperature sensing means are calculated, and the reference corresponds to the calculated temperature deviation and the current target temperature of the evaporator. A control unit for controlling the compressor by comparing the temperature deviation, determines whether the evaporator is icing according to the size.
Description
The present invention relates to a vehicle air conditioner, and more particularly, by improving the structure of the evaporator icing prevention device, it is possible to improve the icing prevention efficiency of the evaporator, through which the cooling performance in the cabin and comfort in the cabin It relates to a vehicle air conditioner that can improve the.
An air conditioner is installed in a car to cool and heat a cabin. This air conditioning apparatus is equipped with the evaporator 1 of an air conditioner, as shown in FIG.
The evaporator 1 introduces a refrigerant supplied from the
In particular, when the user sets the temperature inside the vehicle (hereinafter referred to as "user set temperature"), a specific "target temperature" is calculated according to the "user set temperature" and "temperature conditions outside the vehicle," such " It is automatically controlled according to the target temperature. Therefore, the temperature inside the vehicle is automatically controlled according to the "user set temperature".
On the other hand, when the temperature of the refrigerant circulating along the internal flow path is too low, such an evaporator 1 may cause moisture to freeze on its surface (hereinafter referred to as "icing"). Therefore, the
The
The
Here, the
The reason for this configuration is that the
In particular, in order to accurately control the evaporator 1 to the "target temperature", an average temperature of each part of the evaporator 1 is required. In order to detect the average temperature of the evaporator 1, the evaporator 1 This is because it is necessary to detect the part of the surface temperature distribution of each part that maintains the average temperature.
By the way, such a conventional air conditioning apparatus has a structure in which the
And because of these disadvantages, the icing phenomenon does not occur in the average temperature portion of the surface of the evaporator 1, if the icing phenomenon occurs in the portion maintaining the temperature below the average temperature, there is a problem that can not cope with this.
That is, even when the part which maintains average temperature is not below freezing point (0 degreeC) among the surfaces of the evaporator 1, the part which keeps below average temperature often falls below freezing point (0 degreeC). In this case, the icing phenomenon does not occur in the average temperature portion of the evaporator 1, but the icing phenomenon occurs in the portion below the average temperature. Therefore, despite the occurrence of icing of the evaporator 1, there is a disadvantage that the icing does not occur on the surface of the evaporator 1.
And even though an icing phenomenon occurs on the surface of the evaporator 1 due to these disadvantages, it is pointed out that a problem that cannot cope with this.
On the other hand, in view of this, there is also a method of controlling the
However, in this method, since the
And the drawback is pointed out because of such a problem that the cooling performance in the interior of the vehicle is lowered, whereby the comfort in the interior is remarkably lowered.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to improve the structure of the icing prevention device, thereby preventing frequent on / off of the icing prevention device and at the same time effectively preventing the icing phenomenon of the evaporator. It is to provide a vehicle air conditioner that can be prevented.
Another object of the present invention is to prevent the frequent on and off of the icing device, while at the same time configured to effectively prevent the icing phenomenon of the evaporator, due to the icing phenomenon of the evaporator and the frequent on, off of the icing device An object of the present invention is to provide a vehicle air conditioner capable of preventing the air conditioner from deteriorating cooling performance.
Another object of the present invention is to configure the icing phenomenon of the evaporator and to prevent the deterioration of the cooling performance of the air conditioner due to frequent on and off of the icing device, it is possible to improve the cooling performance in the cabin, It is to provide a vehicle air conditioning apparatus that can improve the comfort in the vehicle interior.
In order to achieve the above object, the vehicle air conditioner according to the present invention includes an evaporator for cooling the air blown into the cabin with the refrigerant supplied from the compressor, the evaporator is a vehicle air conditioner controlled to a predetermined target temperature A first and second temperature sensing means installed at a predetermined distance to a portion of the evaporator so as to sense a temperature at two specific places having different temperature distributions among the surface portions of the evaporator; A reference temperature deviation for each target temperature of the evaporator is stored, and temperature deviations of two surface portions of the evaporator input by the first and second temperature sensing means are calculated, and the calculated temperature deviation and the current target temperature of the evaporator are calculated. Comparing the corresponding reference temperature deviation, it characterized in that it comprises a control unit for determining whether the icing occurs in the evaporator according to the size.
Preferably, the control unit, after calculating the temperature deviation of the two surface portions of the evaporator input by the first and second temperature sensing means, the reference corresponding to the calculated temperature deviation and the current target temperature of the evaporator Comparing the temperature deviation, it is characterized in that it is determined that the icing occurs in the evaporator when the calculated temperature deviation of the two surface parts of the evaporator is more than the reference temperature deviation.
The controller may turn off the compressor when it is determined that icing is generated in the evaporator.
The reference temperature deviations for each evaporator target temperature stored in the controller are set to have a larger magnitude in proportion to the larger evaporator target temperature.
And the first temperature detecting means is installed at a portion of the surface portion of the evaporator to maintain the average temperature, and detects the average temperature among the surface temperatures of the evaporator; The second temperature sensing means is installed on the surface portion of the surface portion of the evaporator to maintain the lowest temperature, characterized in that for sensing the lowest temperature of the surface temperature of the evaporator.
The control unit, when the average temperature of the evaporator input from the first temperature sensing means is lowered below the freezing point (0 ° C.), enters a first mode and the temperature deviations of two surface parts of the evaporator and the evaporator Regardless of the magnitude of the reference temperature deviation for each target temperature, the compressor is turned off and only when the average temperature of the evaporator input from the first temperature sensing means does not fall below the freezing point (0 ° C.). The compressor is controlled according to a temperature deviation of two surface parts of the evaporator and a magnitude of a reference temperature deviation for each target temperature of the evaporator while entering the mode.
According to the vehicle air conditioner according to the present invention, since the icing prevention device is controlled in consideration of both the "average temperature" and the "lowest temperature" among the surface temperatures for each part of the evaporator, the "average temperature" or "lowest temperature" There are effects that can solve various disadvantages of controlling with bay.
In particular, there is an effect that can prevent the "on-icing efficiency reduction phenomenon" by controlling only with "average temperature" and the frequent on / off phenomenon of the icing prevention device by controlling only with "lowest temperature". .
In addition, since the "icing prevention efficiency reduction phenomenon" and the frequent "on / off phenomenon" of the icing prevention device can be prevented, the "cooling efficiency of the icing prevention phenomenon" and the "cooling" of the air conditioner due to the frequent "on and off phenomenon" Performance degradation phenomenon ”can be prevented.
In addition, since the structure that can prevent the "cooling performance degradation phenomenon" of the air conditioner, it is possible to improve the cooling performance in the vehicle interior, thereby improving the comfort in the vehicle interior.
1 is a view showing a conventional vehicle air conditioner,
2 is a view showing the configuration of a vehicle air conditioner according to the present invention;
3 is a perspective view of an evaporator showing an installation example of the first and second temperature sensing means of the icing prevention device constituting the air conditioning apparatus of the present invention;
4 is a flowchart showing an operation example of the vehicle air conditioner according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.
First, prior to looking at the features of the vehicle air conditioner according to the present invention, a brief description of the evaporator 1 of the air conditioner with reference to FIG.
The evaporator 1 of the air conditioner introduces a refrigerant supplied from the
In particular, when the user sets the "user set temperature", a specific "target temperature" is calculated according to the set "user set temperature" and "temperature conditions outside the vehicle," which is automatically controlled in accordance with the "target temperature".
Next, the features of the vehicle air conditioner according to the present invention will be described in detail with reference to FIGS. 2 and 3.
First, the air conditioner of the present invention, the evaporator 1 is provided with an
The
The first temperature sensing means 20 is provided on the surface of the evaporator 1 as a temperature sensor, but is provided on a portion of the surface temperature distribution for each part of the evaporator 1 that maintains the average temperature.
The first temperature detecting means 20 serves to detect an average temperature (hereinafter, referred to as "average temperature of the evaporator 1") of the surface temperatures for each part of the evaporator (1).
Here, it is preferable that the 1st temperature detection means 20 uses the existing evaporator sensor commonly used for the automatic control of the evaporator 1 to a "target temperature." Therefore, it is possible to detect the average temperature data of the evaporator 1 without having a separate temperature sensor, thereby reducing the number of parts it can be achieved the effect of cost reduction.
The second temperature sensing means 30 is provided as a temperature sensor at a portion spaced apart from the first temperature sensing means 20 by a predetermined distance. In more detail, it is provided in the part in which the 1st temperature sensing means 20 is installed, and in the part of the evaporator 1 which has a different surface temperature distribution.
The second temperature sensing means 30 senses the temperature of the surface portion of the evaporator 1 spaced apart from the first temperature sensing means 20.
In particular, since the temperature of the portion spaced apart from the first temperature sensing means 20, unlike the second temperature sensing means 30 for sensing the average temperature of the evaporator 1, the role of sensing a temperature other than the average temperature Do it.
Preferably, the second temperature sensing means 30 is preferably provided on the surface portion of the surface of the evaporator 1 that maintains the lowest temperature. Therefore, it is good to detect the lowest surface temperature among the surface temperatures of the evaporator 1.
2 and 3, the
The
As a result of the determination, when the "average temperature" of the evaporator 1 falls below the freezing point (0 ° C), the
Here, the
2 and 3, the
The
When the temperature data of two places of the evaporator 1 are input from the first and second temperature sensing means 20 and 30, the
On the other hand, the
The
As a result of the comparison, if the "temperature deviation" between two temperatures of the evaporator 1 calculated by the
In response to this determination, the
Here, the
On the other hand, the "reference temperature deviation" value built into the
Here, the "reference temperature deviation" value for each "evaporator target temperature" stored in the
The reason for this configuration is that as the "evaporator target temperature" is larger, the temperature deviation between the average temperature and the lowest temperature portion of the surface of the evaporator 1 increases, and the temperature deviation between the average temperature and the lowest temperature portion of the surface of the evaporator 1 increases. This is because the larger the incidence rate of icing in the evaporator 1 is, the larger it becomes.
Therefore, the larger the "evaporator target temperature", the larger the "reference temperature deviation" value for each "evaporator target temperature", the larger the target temperature of the evaporator 1, the more actively the high icing incidence rate of the evaporator 1 To be able.
Next, an operation example of the present invention having such a configuration will be described with reference to FIGS. 2 to 4.
First, referring to FIG. 4 and FIG. 2, in a state where the air conditioner is turned on (S101), the temperature of the portion of the surface of the evaporator 1 that maintains the “average temperature” is below the freezing point (0 ° C.). It is determined whether or not the degradation (S103).
As a result of determination, when the "average temperature" of the evaporator 1 falls below freezing point (0 degreeC), the
The
On the other hand, the
As a result of the determination, when the average temperature of the evaporator 1 is higher than the freezing point (0 ° C.), the
On the other hand, if the determination result at step S103 is that the "average temperature" of the evaporator 1 does not fall below the freezing point (0 ° C) (S103-1), the
The
When the detection of the "reference temperature deviation" corresponding to the "target temperature" and the calculation of the "temperature deviation" between the average temperature and the lowest temperature of the evaporator 1 are completed, the
As a result, when the "temperature deviation" between the average temperature and the minimum temperature of the evaporator 1 is more than "the reference temperature deviation", the
On the other hand, the
As a result of determination, if the "temperature deviation" between the average temperature and the lowest temperature of the evaporator 1 falls below the "standard temperature deviation", the
According to the air conditioner of the present invention having such a configuration, since the
In particular, the "Icing prevention efficiency reduction phenomenon" by controlling only with "average temperature" and the frequent on and off phenomenon of the
In addition, since the "icing prevention efficiency fall phenomenon" and the frequent "on, off phenomenon" of the
In addition, the structure that can prevent the "cooling performance degradation phenomenon" of the air conditioner, it is possible to improve the cooling performance in the vehicle interior, thereby improving the comfort in the vehicle interior.
Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.
1: evaporator 3: compressor
10: icing prevention device 20: first temperature sensing means
30: second temperature sensing means 40: control unit
42: memory section 44: calculating section
Claims (7)
The first and second temperature sensing means 20 are installed at a certain distance from the portion of the evaporator 1 so as to sense the temperature of two specific places having different temperature distributions among the surface portions of the evaporator 1. , 30);
A reference temperature deviation for each target temperature of the evaporator is stored, and temperature deviations of two surface portions of the evaporator 1 input from the first and second temperature sensing means 20 and 30 are calculated, and the calculated temperature deviations are calculated. And a controller 40 comparing the reference temperature deviation corresponding to the current target temperature of the evaporator 1 and determining whether the evaporator 1 is icing according to the size thereof.
The reference temperature deviation value built into the memory unit 42 of the controller is stored in various ways for each evaporator target temperature.
The reference temperature deviation value for each evaporator target temperature stored in the memory unit 42 is set to have a gradually larger size in proportion to the larger evaporator target temperature.
The control unit 40,
After calculating the temperature deviations of the two surface portions of the evaporator 1 input by the first and second temperature sensing means 20 and 30, the calculated temperature deviation and the current target temperature of the evaporator 1 are calculated. Comparing the corresponding reference temperature deviation, it is determined that the icing is generated in the evaporator 1 when the calculated temperature deviation of the two surface portions of the evaporator 1 is equal to or more than the reference temperature deviation. Device.
The control unit 40,
When it is determined that the icing is generated in the evaporator (1), the vehicle air conditioner, characterized in that the compressor (3) is turned off (OFF).
The first temperature sensing means 20,
Installed in a portion of the surface portion of the evaporator (1) that maintains the average temperature, the average temperature of the surface temperature of the evaporator (1);
The second temperature sensing means 30,
Vehicle surface air conditioning apparatus, characterized in that installed on the surface portion of the surface portion of the evaporator (1) to maintain the lowest temperature, the lowest temperature of the surface temperature of the evaporator (1).
The control unit 40,
When the average temperature of the evaporator 1 input from the first temperature sensing means 20 falls below the freezing point (0 ° C.), the temperature of two surface portions of the evaporator 1 is entered while entering the first mode. The compressor 3 is turned off regardless of the deviation and the magnitude of the reference temperature deviation for each evaporator target temperature.
Only when the average temperature of the evaporator 1 input from the first temperature sensing means 20 does not fall below the freezing point (0 ° C.), the second mode enters the second mode and the two surface portions of the evaporator 1 A vehicle air conditioning apparatus, characterized in that for controlling the compressor (3) according to the temperature deviation and the magnitude of the reference temperature deviation for each target temperature of the evaporator.
The control unit 40,
When the average temperature of the evaporator 1 input from the first temperature sensing means 20 becomes higher than the freezing point (0 ° C.) in the state of entering the first mode, the icing of the evaporator 1 is eliminated. The compressor 3 is turned on again,
When the temperature deviation of two surface portions of the evaporator 1 drops below the reference temperature deviation in the state of entering the second mode, it is determined that the icing of the evaporator 1 is resolved and the compressor ( 3) ON the vehicle air conditioner, characterized in that ON again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140080716A KR102037248B1 (en) | 2014-06-30 | 2014-06-30 | Air conditioning system for automotive vehicles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140080716A KR102037248B1 (en) | 2014-06-30 | 2014-06-30 | Air conditioning system for automotive vehicles |
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| Publication Number | Publication Date |
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| KR20160002474A KR20160002474A (en) | 2016-01-08 |
| KR102037248B1 true KR102037248B1 (en) | 2019-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020140080716A KR102037248B1 (en) | 2014-06-30 | 2014-06-30 | Air conditioning system for automotive vehicles |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004268769A (en) * | 2003-03-10 | 2004-09-30 | Denso Corp | Refrigeration cycle apparatus for vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10197110A (en) * | 1997-01-09 | 1998-07-31 | Tabai Espec Corp | Frosted state discriminating device |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004268769A (en) * | 2003-03-10 | 2004-09-30 | Denso Corp | Refrigeration cycle apparatus for vehicle |
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