CN101430152A - Thermometer bulb filling method for R410A air conditioner thermal expansion valve - Google Patents
Thermometer bulb filling method for R410A air conditioner thermal expansion valve Download PDFInfo
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- CN101430152A CN101430152A CNA200810162483XA CN200810162483A CN101430152A CN 101430152 A CN101430152 A CN 101430152A CN A200810162483X A CNA200810162483X A CN A200810162483XA CN 200810162483 A CN200810162483 A CN 200810162483A CN 101430152 A CN101430152 A CN 101430152A
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- expansion valve
- thermometer bulb
- air
- air conditioner
- heating power
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Abstract
The invention discloses a filling method of a temperature sensing bulb of an R410A air-conditioning thermostatic expansion valve. The method is realized by a gas cross filling means, that is, the temperature sensing bulb is filled with liquid or gaseous R125 refrigerant different from a working substance of an air-conditioning system. In the method, the temperature sensing bulb of the R410A air-conditioning thermostatic expansion valve is filled with the refrigerant different from the working substance of the air-conditioning system, and a superheat degree deviation is always below 1 DEG C under different refrigeration operating conditions, which causes the thermostatic expansion valve to approximately achieve the target requirement of equal superheat degree while running in a wider operating condition range, greatly improves the precision of superheat degree control on the evaporator, and ensures operating stability of the air-conditioning system.
Description
[technical field]
The present invention relates to refrigeration technology field, especially the heating power expansion valve temperature-sensing element is specifically related to a kind of R410A air conditioner heating power expansion valve thermometer bulb and fills method.
[technical background]
At refrigeration technology field, heating power expansion valve is the throttling arrangement that a kind of degree of superheat by control evaporator outlet gaseous refrigerant is controlled the evaporimeter liquid supply rate, it is made up of temperature-sensing control element and executive component, and what the present invention relates to is the filled method of the thermometer bulb interior media of temperature-sensing control element.The effect of medium is in the thermometer bulb, its pressure can change along with the change of evaporator superheat, and act on the upper surface of thermal expansion valve film, after reaching a certain pressure balance with the evaporating pressure of diaphragm lower surface and preloading spring pressure, make valve keep a certain aperture, regulate refrigerant flow according to degree of superheat signal with this.Filled problem for the thermometer bulb medium, the scheme that industrial quarters generally adopts is to fill with working medium, be that interior working medium of thermometer bulb and air-conditioning system working medium are same cold-producing medium, this filled method also can satisfy the requirement of the degrees of superheat such as being similar to reluctantly in less operating mode scope, but if operating mode wider range of practical application, the degree of superheat deviation ratio that the heating power expansion valve that adopts R410A to fill with working medium shows is bigger, generally all more than 1 ℃.Cause heating power expansion valve relatively poor, influence the stability of air-conditioning system operation the degree of superheat control accuracy of evaporimeter.
Up to the present, also do not find relevant patent report, fill problem at the heating power expansion valve thermometer bulb of R410A air-conditioning and propose effective method that the system that makes all can be similar to and degree of superheat index such as reach under certain operating mode scope, the different degree of superheat.
[summary of the invention]
Purpose of the present invention is exactly in order to solve problems of the prior art, propose a kind of R410A air conditioner heating power expansion valve thermometer bulb and fill method, can make heating power expansion valve when big operating mode scope is moved, be similar to the index request of the degrees of superheat such as reaching, improve degree of superheat control accuracy evaporimeter.
For achieving the above object, patent of the present invention has proposed a kind of R410A air conditioner heating power expansion valve thermometer bulb and has filled method, adopts gas cross to fill mode, promptly fills the cold-producing medium different with air-conditioning system working medium in thermometer bulb.
As preferably, this cold-producing medium adopts gaseous state R125 or liquid R125.
As preferably, under room temperature environment, fill gaseous state R125 in the thermometer bulb, filled pressure is equal to or greater than the R125 saturated gas pressure under the corresponding room temperature.
As preferably, during 25 ℃ of room temperatures, filled pressure is equal to or greater than the R125 saturated gas pressure 1.28Mpa of 25 ℃ of correspondences.
The beneficial effect of patent of the present invention: the present invention fills the cold-producing medium different with air-conditioning system working medium in R410A air conditioner heating power expansion valve thermometer bulb, under different cooling conditions, degree of superheat deviation is all in 1 ℃, make heating power expansion valve when big operating mode scope is moved, can be similar to the index request of the degrees of superheat such as reaching, degree of superheat control accuracy to evaporimeter is greatly improved, and has also guaranteed the stability of air-conditioning system operation simultaneously.
[specific embodiment]
R410A air conditioner heating power expansion valve thermometer bulb fills method, adopts gas cross to fill mode, promptly adopts the cold-producing medium different with refrigeration system working medium to carry out gas charge.Concrete operation method is: under room temperature environment, fill gaseous state R125 or liquid R125 cold-producing medium in the thermometer bulb, filled pressure is controlled at the R125 saturated gas pressure that is equal to or greater than under the corresponding room temperature, during such as 25 ℃ of room temperatures, filled pressure is not less than the R125 saturated gas pressure 1.28MPa of 25 ℃ of correspondences.The R410A air-conditioning that uses heating power expansion valve of the present invention is for degree of superheat scope: 4-10 ℃ commonly used, under cooling condition, evaporating temperature scope: 0-10 ℃, the maximum degree of superheat deviation under the different degrees of superheat can guarantee the stability of air-conditioning system operation preferably in 0.08-0.90 ℃ of scope.
R125 can adopt liquid to fill or gas fills, and all is fine carrying out carrying out gas charge under liquid fill and the room temperature under certain low temperature.Liquid filling in the general thermostat about 0 ℃ fills, and gas charge then at room temperature.Need design according to practical refrigeration system in the present embodiment, when promptly the thermometer bulb temperature was no more than 25 ℃, the cold-producing medium in the thermometer bulb was in saturation state all the time.In production reality, under the less situation of the refrigerant amount of liquid fill, liquid volume is not easy control, and at room temperature as long as control fills pressure, so present embodiment adopts, and room temperature air is filled preferably.
Filling R125 in the thermometer bulb of R410A air-conditioning draws through a large amount of theoretical researches and experiment.At first all cold-producing mediums commonly used are calculated one by one, screen; The screening design conditions: degree of superheat scope: 4-10 ℃ 1. commonly used, 2. under heating condition, evaporating temperature scope :-20-0 ℃, 3. under the cooling condition, evaporating temperature scope: 0-10 ℃, 4. the maximum degree of superheat deviation under 4-10 ℃ of degree of superheat is less than 1 ℃.Calculate the degree of superheat under the different evaporating temperatures more respectively, relatively the deviation between the degree of superheat.If the degree of superheat deviation under all operating modes less than 1 ℃, then fills working medium with this cold-producing medium as thermometer bulb.By big quantity research and the calculating and the combination experiment of above method, find the situation degree of superheat deviation minimum that gaseous state R125 is filled, best results.
R410A, R125 are the adopted name of the cold-producing medium commonly used of this area herein.
The foregoing description is to explanation of the present invention, is not limitation of the invention, any scheme after the simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (4)
1.R410A the air conditioner heating power expansion valve thermometer bulb fills method, it is characterized in that: adopt gas cross to fill mode, promptly in thermometer bulb, fill the cold-producing medium different with air-conditioning system working medium.
2. R410A air conditioner heating power expansion valve thermometer bulb as claimed in claim 1 fills method, it is characterized in that: this cold-producing medium adopts gaseous state R125 or liquid R125.
3. R410A air conditioner heating power expansion valve thermometer bulb as claimed in claim 2 fills method, it is characterized in that: under room temperature environment, fill gaseous state R125 in the thermometer bulb, filled pressure is equal to or greater than the R125 saturated gas pressure under the corresponding room temperature.
4. R410A air conditioner heating power expansion valve thermometer bulb as claimed in claim 3 fills method, it is characterized in that: during 25 ℃ of room temperatures, filled pressure is equal to or greater than the R125 saturated gas pressure 1.28Mpa of 25 ℃ of correspondences.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810162483XA CN101430152A (en) | 2008-11-26 | 2008-11-26 | Thermometer bulb filling method for R410A air conditioner thermal expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810162483XA CN101430152A (en) | 2008-11-26 | 2008-11-26 | Thermometer bulb filling method for R410A air conditioner thermal expansion valve |
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| Publication Number | Publication Date |
|---|---|
| CN101430152A true CN101430152A (en) | 2009-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200810162483XA Pending CN101430152A (en) | 2008-11-26 | 2008-11-26 | Thermometer bulb filling method for R410A air conditioner thermal expansion valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914104A (en) * | 2011-08-02 | 2013-02-06 | 株式会社鹭宫制作所 | Temperature expansion valve |
| CN102914103A (en) * | 2011-08-02 | 2013-02-06 | 株式会社鹭宫制作所 | Temperature expansion valve |
-
2008
- 2008-11-26 CN CNA200810162483XA patent/CN101430152A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914104A (en) * | 2011-08-02 | 2013-02-06 | 株式会社鹭宫制作所 | Temperature expansion valve |
| CN102914103A (en) * | 2011-08-02 | 2013-02-06 | 株式会社鹭宫制作所 | Temperature expansion valve |
| CN102914104B (en) * | 2011-08-02 | 2014-12-24 | 株式会社鹭宫制作所 | Temperature expansion valve |
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Open date: 20090513 |