CN113865032A - Method for presetting dynamic exhaust temperature target value - Google Patents
Method for presetting dynamic exhaust temperature target value Download PDFInfo
- Publication number
- CN113865032A CN113865032A CN202111175404.0A CN202111175404A CN113865032A CN 113865032 A CN113865032 A CN 113865032A CN 202111175404 A CN202111175404 A CN 202111175404A CN 113865032 A CN113865032 A CN 113865032A
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- CN
- China
- Prior art keywords
- exhaust temperature
- vapor injection
- enhanced vapor
- value
- key factors
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000012886 linear function Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 abstract description 9
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioner control, and provides a preset method of a dynamic exhaust temperature target value in order to obtain the dynamic exhaust temperature of an air conditioning system, which comprises the following steps: step S1, dividing the operation conditions of the air conditioner; step S2, acquiring key factors influencing the exhaust temperature; s3, performing data test on different working conditions to obtain an optimal exhaust temperature value; step S4, performing function fitting on the optimal exhaust temperature value and the key factors to obtain a corresponding fitting function; and step S5, determining the target exhaust temperature by adopting the fitting function. By adopting the mode, the dynamic acquisition of the exhaust temperature is realized, and the operation efficiency of the air conditioning system is improved by adjusting according to the dynamic temperature.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a method for presetting a dynamic exhaust temperature target value.
Background
The exhaust temperature is an important parameter of the air conditioning system and can be used for controlling the opening degree of a throttling element of the air conditioning system, but the target value of the exhaust temperature conventionally used for control is mostly a fixed value, and the target value of the exhaust temperature cannot be dynamically reflected by adopting the mode, so that the control of the air conditioning system cannot be kept to operate efficiently all the time.
Disclosure of Invention
In order to obtain the dynamic exhaust temperature of the air conditioning system and improve the operation efficiency, a preset method of a dynamic exhaust temperature target value is provided.
The technical scheme adopted by the invention for solving the problems is as follows:
the preset method of the dynamic exhaust temperature target value comprises the following steps:
step S1, dividing the operation conditions of the air conditioner;
step S2, acquiring key factors influencing the exhaust temperature;
s3, performing data test on different working conditions to obtain an optimal exhaust temperature value;
step S4, performing function fitting on the optimal exhaust temperature value and the key factors to obtain a corresponding fitting function;
and step S5, determining the target exhaust temperature by adopting the fitting function.
Further, the operation condition is divided into a refrigeration condition and a heating condition according to the operation state.
Furthermore, the operation condition is divided into opening enhanced vapor injection and not opening enhanced vapor injection according to whether the enhanced vapor injection is opened or not.
Furthermore, the operation condition is divided according to the degree of superheat A of enhanced vapor injection under the premise of opening enhanced vapor injection, and the division is divided into that the degree of superheat of enhanced vapor injection is more than or equal to A and the degree of superheat of enhanced vapor injection is less than A.
Further, the value range of the enhanced vapor injection superheat degree A is 2-6 ℃.
Further, the fitting function is a linear function.
Further, the key factors are a high pressure value and a low pressure value.
Further, the key factors are a high pressure saturation temperature and a low pressure saturation temperature.
Further, the fitting function is: and T is cM + dN + e, wherein M is the high-pressure saturation temperature, N is the low-pressure saturation temperature, c, d and e are constant coefficients, the value range of c is 0.5-2.0, and the value range of d is-2.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, different fitting functions are determined according to the influence of key factors on the exhaust temperature under different working conditions, and the corresponding functions are called according to different working conditions of operation during the operation of the air conditioner to obtain the exhaust temperature in real time, so that the high-efficiency operation of the air conditioning system is realized. The exhaust temperature of the compressor is influenced most obviously by high exhaust pressure and low suction pressure, in the existing low-temperature air-conditioning system, the influence of enhanced vapor injection on the exhaust temperature is large, wherein the influence of the enhanced vapor injection is large after the enhanced vapor injection is started, so that the invention divides the air-conditioning operation working conditions into refrigeration, heating, enhanced vapor injection opening and closing and the like after experimental research, respectively fits various different working conditions, can more accurately reflect the influence of key factors on the exhaust temperature under each working condition, and further ensures the more optimal operation of the system. Similarly, the discharge pressure and the corresponding saturation temperature, the suction pressure and the corresponding saturation temperature are important determining factors of the discharge temperature, and no matter the variable-speed compressor or the fixed-speed compressor can reflect the compression condition of the refrigerant in the compressor through various different operation key factors (the high pressure, the low pressure and the saturation temperature corresponding to the high pressure and the low pressure), so that the optimal discharge temperature control is sought, and the system can operate efficiently.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The preset method of the dynamic exhaust temperature target value comprises the following steps:
step S1, dividing the operation conditions of the air conditioner;
step S2, acquiring key factors influencing the exhaust temperature, wherein the key factors can be a high-pressure value and a low-pressure value, and can also be a high-pressure saturation temperature and a low-pressure saturation temperature, the key factors can be selected according to actual conditions, and different key factors can be used under different operating conditions;
s3, performing data test on different working conditions to obtain an optimal exhaust temperature value;
step S4, performing function fitting on the optimal exhaust temperature value and the key factors to obtain a corresponding fitting function, wherein the fitting function is preferably a linear function;
and step S5, determining the target exhaust temperature by adopting the fitting function.
Specifically, the operation condition is divided into a cooling condition and a heating condition according to the operation state.
In order to make the obtained target exhaust temperature more accurate, a more detailed division method is adopted when working condition division is carried out: if the gas injection enthalpy is divided according to the running state, the gas injection enthalpy is divided into the opening gas injection enthalpy and the non-opening gas injection enthalpy according to whether the gas injection enthalpy is opened or not.
Furthermore, on the premise of starting enhanced vapor injection, the method also comprises the step of dividing according to the degree of superheat A of enhanced vapor injection, wherein the degree of superheat of enhanced vapor injection is more than or equal to A, and the degree of superheat of enhanced vapor injection is less than A; the value range of the enhanced vapor injection superheat degree A is 2-6 ℃.
For example, the fitting function is: and T is cM + dN + e, wherein M is the high-pressure saturation temperature, N is the low-pressure saturation temperature, c, d and e are constant coefficients, the value range of c is 0.5-2.0, and the value range of d is-2. When the air conditioner operates under the working condition, the exhaust temperature value can be dynamically obtained according to the fitting function, so that the operation efficiency is improved.
Claims (9)
1. A method of presetting a dynamic exhaust temperature target value, comprising:
step S1, dividing the operation conditions of the air conditioner;
step S2, acquiring key factors influencing the exhaust temperature;
s3, performing data test on different working conditions to obtain an optimal exhaust temperature value;
step S4, performing function fitting on the optimal exhaust temperature value and the key factors to obtain a corresponding fitting function;
and step S5, determining the target exhaust temperature by adopting the fitting function.
2. The method of claim 1, wherein the operation condition is divided into a cooling condition and a heating condition according to an operation status.
3. The method of claim 2, wherein the operating condition is further divided into an on-state enhanced vapor injection and an off-state enhanced vapor injection according to whether enhanced vapor injection is on or off.
4. The method according to claim 3, wherein the operating condition is divided according to the degree of superheat A of enhanced vapor injection under the condition that enhanced vapor injection is started, and the division is performed according to the degree of superheat A of enhanced vapor injection and the division is that the degree of superheat of enhanced vapor injection is greater than or equal to A and the degree of superheat of enhanced vapor injection is less than A.
5. The method for presetting the dynamic exhaust temperature target value according to claim 4, wherein the value range of the enhanced vapor injection superheat degree A is 2-6 ℃.
6. The method of claim 1, wherein the fitting function is a linear function.
7. The method as claimed in any one of claims 1 to 6, wherein the key factors are a high pressure value and a low pressure value.
8. The method as claimed in any one of claims 1 to 6, wherein the key factors are a high pressure saturation temperature and a low pressure saturation temperature.
9. The method of claim 8, wherein the fitting function is: and T is cM + dN + e, wherein M is the high-pressure saturation temperature, N is the low-pressure saturation temperature, c, d and e are constant coefficients, the value range of c is 0.5-2.0, and the value range of d is-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111175404.0A CN113865032A (en) | 2021-10-09 | 2021-10-09 | Method for presetting dynamic exhaust temperature target value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111175404.0A CN113865032A (en) | 2021-10-09 | 2021-10-09 | Method for presetting dynamic exhaust temperature target value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113865032A true CN113865032A (en) | 2021-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111175404.0A Pending CN113865032A (en) | 2021-10-09 | 2021-10-09 | Method for presetting dynamic exhaust temperature target value |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113865032A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000074206A (en) * | 1999-05-19 | 2000-12-15 | 구자홍 | Air conditioner driving method |
| CN109945562A (en) * | 2019-01-30 | 2019-06-28 | 广东芬尼能源技术有限公司 | A kind of heat pump unit and its delivery temperature control method, device |
| CN112197438A (en) * | 2020-09-25 | 2021-01-08 | 堃霖冷冻机械(上海)有限公司 | Method for controlling middle injection amount of low-ring-temperature heat pump water heater |
| CN113137715A (en) * | 2021-03-16 | 2021-07-20 | 青岛海尔空调电子有限公司 | Control method for compressor frequency of multi-split air conditioner and multi-split air conditioner |
-
2021
- 2021-10-09 CN CN202111175404.0A patent/CN113865032A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000074206A (en) * | 1999-05-19 | 2000-12-15 | 구자홍 | Air conditioner driving method |
| CN109945562A (en) * | 2019-01-30 | 2019-06-28 | 广东芬尼能源技术有限公司 | A kind of heat pump unit and its delivery temperature control method, device |
| CN112197438A (en) * | 2020-09-25 | 2021-01-08 | 堃霖冷冻机械(上海)有限公司 | Method for controlling middle injection amount of low-ring-temperature heat pump water heater |
| CN113137715A (en) * | 2021-03-16 | 2021-07-20 | 青岛海尔空调电子有限公司 | Control method for compressor frequency of multi-split air conditioner and multi-split air conditioner |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211231 |
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| RJ01 | Rejection of invention patent application after publication |