CN111457630A - Environment test equipment based on suction superheat degree and air volume partition and control method thereof - Google Patents
Environment test equipment based on suction superheat degree and air volume partition and control method thereof Download PDFInfo
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- CN111457630A CN111457630A CN202010248198.0A CN202010248198A CN111457630A CN 111457630 A CN111457630 A CN 111457630A CN 202010248198 A CN202010248198 A CN 202010248198A CN 111457630 A CN111457630 A CN 111457630A
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- air volume
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- superheat degree
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/005—Compression machines, plants or systems with non-reversible cycle of the single unit type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
- G01K13/024—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow of moving gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The embodiment of the invention provides an environment test device based on suction superheat degree and air volume partition and a control method thereof, wherein the environment test device comprises: the system comprises a compressor, an evaporator and a temperature sensor, wherein the compressor and the evaporator are connected through a pipeline; a fan capable of adjusting output air quantity is arranged on one side of the evaporator, and the fan is controlled by a control module to control the rotating speed; the control module is used for matching a target superheat degree in a preset data set based on the current air suction temperature acquired by the temperature sensor, and controlling the fan to adjust to the target air volume according to the matched target superheat degree. The embodiment of the invention ensures that the system is in the optimal flow running state by controlling the suction superheat degree zone control and the air volume zone control, thereby ensuring the superheat degree of the system to prevent the liquid impact of the compressor and achieving the aim of saving energy.
Description
Technical Field
The invention relates to the field of environmental test equipment, in particular to environmental test equipment based on suction superheat degree and air volume partition and a control method thereof.
Background
For environmental test equipment, system flow is often controlled by load demand, but control of superheat is generally lacking. As a result, the compressor may suffer liquid slugging, or the lubricating effect of the lubricating oil may be reduced, resulting in damage to the compressor.
Specifically, if the superheat degree is too high, the lubricating effect of the lubricating oil is reduced, the lubricating oil is carbonized, and the wear of the compressor is severe. Conversely, if the superheat is too low, the concentration of the lubricating oil decreases, which may cause the system to return to liquid, and the liquid impact may cause the compressor to be damaged.
Disclosure of Invention
In view of the defects of the prior art, embodiments of the present invention provide an environmental test apparatus based on a suction superheat degree and an air volume partition and a control method thereof, which can effectively solve the above problems.
The invention realizes the purpose through the following technical scheme:
an environmental test device control method based on suction superheat degree and air volume partition comprises the following steps: the temperature sensor is arranged on the pipeline and is positioned at the upstream of the inlet end of the compressor; a fan capable of adjusting output air volume is arranged on one side of the evaporator, and the fan is controlled by a control module to rotate at a controlled speed; the control method comprises the following steps:
matching a target superheat degree in a preset data set based on the current suction temperature acquired by the temperature sensor;
and controlling the fan to adjust to the corresponding target air volume according to the matched target superheat degree.
Preferably, the target degree of superheat is correlated with an in-box load of the environmental test equipment, the target air volume is inversely correlated with the in-box load, and the larger the in-box load is, the smaller the target air volume is.
Preferably, the preset data set is acquired in the following manner:
when the internal temperature of the environment test device changes from a first extreme temperature T1 to a second extreme temperature T2, the temperature range from the first extreme temperature T1 to the second extreme temperature T2 is divided into a plurality of temperature sections, which are respectively: the superheat degree of the liquid refrigerant is determined by a first temperature section [ T1, T11], a second temperature section (T11, T12, … and an nth temperature section (T1 n, T2), wherein each temperature section corresponds to a target superheat degree, namely, the first temperature section [ T1, T11] corresponds to a first target superheat degree SH1, the second temperature section (T11, T12) corresponds to a second target superheat degree SH2, …, and the nth temperature section (T1 n, Tmin) corresponds to an nth target superheat degree SHn.
Preferably, the target superheat degree is associated with the target air volume in a one-to-one correspondence manner, namely: the first target superheat SH1 corresponds to the first target air volume V1, the second target superheat SH2 corresponds to the second target air volume V2, …, and the nth target superheat SH2 corresponds to the nth target air volume Vn.
An environmental test device based on suction superheat degree and air volume partition, comprising: the temperature sensor is arranged on the pipeline and is positioned at the upstream of the inlet end of the compressor; a fan capable of adjusting output air volume is arranged on one side of the evaporator, and the fan is controlled by a control module to control the rotating speed;
the control module is used for matching a target superheat degree in a preset data set based on the current air suction temperature acquired by the temperature sensor, and controlling the fan to adjust to a corresponding target air volume according to the matched target superheat degree.
The embodiment of the invention acquires the current air suction temperature of the compressor through the temperature sensor, matches the corresponding target superheat degree based on the current air suction temperature, and adjusts the rotating speed of the fan according to the target superheat degree. Then, when the load in the box of the environment test equipment is large, the rotating speed of a fan on the evaporator side is reduced, the air quantity is reduced, the air suction superheat degree in reasonable operation is realized, the energy is saved, and the operation condition of the compressor is reasonable. When the load in the box is small, the rotating speed of a side fan of a fan of the evaporator is increased, the air quantity is increased, a certain suction superheat degree is ensured, and the compressor liquid impact is prevented.
The system is in the optimal flow running state by controlling the suction superheat degree zone control and the air volume zone control, thereby ensuring the superheat degree of the system to prevent the compressor from liquid impact and achieving the purpose of energy conservation.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case. In the drawings:
FIG. 1 is a schematic diagram of an environment testing apparatus based on suction superheat and air volume division according to a non-limiting embodiment of the present invention;
fig. 2 is a region explanatory diagram of the control module.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the invention provides environment test equipment based on suction superheat degree and air volume partition and a control method thereof. As shown in fig. 1, the environmental test apparatus includes: a compressor 1 and an evaporator 2 connected by a pipeline, and a temperature sensor 4 arranged on the pipeline. Further, a pressure sensor 5 can be arranged on the pipeline. Wherein, temperature sensor 4 and pressure sensor 5 are located the entrance point upper reaches of compressor 1, and one side of evaporimeter 2 is equipped with the fan 3 of adjustable output amount of wind, and fan 3 is controlled the rotational speed by control module 6.
As shown in fig. 2, the control flow of the control module 6 is as follows:
step S10: based on the current suction temperature acquired by the temperature sensor 4, the control module 6 matches a target superheat degree in a preset data set;
step S20: and according to the matched target superheat degree, the control module 6 controls the fan 3 to adjust to the corresponding target air volume.
In the present embodiment, the target superheat degree is associated with the in-box load of the environmental test equipment, the target air volume is inversely related to the in-box load, and the larger the in-box load is, the smaller the target air volume is. Namely, different load intervals in the box of the environment test equipment are controlled by different target suction superheat degrees, the matching of the different load intervals with the proper target suction superheat degrees is realized, the flow of the system is accurately adjusted and matched, and the system is in the optimal flow running state.
Specifically, when the load in the box of the environmental test equipment is large, the rotating speed of the fan 3 on the evaporator 2 side is reduced, the air quantity is reduced, the air suction superheat degree is reasonably operated, energy is saved, and the operation condition of the compressor 1 is reasonable. When the load in the box is smaller, the rotating speed of the fan 3 on the evaporator 2 side is increased, the air quantity is increased, a certain suction superheat degree is ensured, and the compressor 1 is prevented from liquid impact.
By controlling the suction superheat degree and the air volume in a partition control mode, the system is in an optimal flow running state, the superheat degree of the system is guaranteed, liquid impact of the compressor 1 is prevented, and the energy-saving purpose can be achieved.
In this embodiment, the preset data set is obtained in the following manner:
when the temperature in the box of the environment test device changes from the first extreme temperature T1 to the second extreme temperature T2, the temperature range from the first extreme temperature T1 to the second extreme temperature T2 is divided into a plurality of temperature sections, which are respectively: the first temperature section [ T1, T11], the second temperature section (T11, T12, … and the nth temperature section (T1 n, T2), wherein each temperature section corresponds to a target superheat degree, namely, the first temperature section [ T1, T11] corresponds to a first target superheat degree SH1, the second temperature section (T11, T12) corresponds to a second target superheat degree SH2, … and the nth temperature section (T1 n, Tmin) corresponds to an nth target superheat degree SHn.
Wherein, the target superheat degree is in one-to-one correspondence with the target air volume, namely: the first target superheat SH1 corresponds to the first target air volume V1, the second target superheat SH2 corresponds to the second target air volume V2, …, and the nth target superheat SH2 corresponds to the nth target air volume Vn.
Thus, when the temperature sensor 4 detects the current suction temperature of the compressor 1, the control module 6 can uniquely match a target superheat degree corresponding thereto in the preset data set, and further match a target air volume uniquely corresponding thereto. Therefore, the control module 6 can control the rotation speed of the fan 3 based on the target air volume, so that the air volume output by the fan 3 reaches the target air volume.
In the present embodiment, the control module 6 may be implemented in any suitable manner, and in particular, for example, the control module 6 may take the form of, for example, a microprocessor or processor and a computer readable medium storing computer readable program code (e.g., software or firmware) executable by the microprocessor or processor, logic gates, switches, Application Specific Integrated Circuits (ASICs), Programmable logic controllers (Programmable L general controller, P L C), and embedded Micro Control Units (MCUs), examples of which include, but are not limited to, the following micro control units ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone L abs C8051F320.
In a specific embodiment, taking the temperature reduction of the environmental test equipment as an example:
when the in-box temperature of the environmental test apparatus is decreased from the upper limit temperature Tmax to the lower limit temperature Tmin, the temperature range between the upper limit temperature Tmax to the lower limit temperature Tmin may be divided into several temperature sections: [ Tmax, T11], (T11, T12, …, (T1 n, Tmin) each corresponding to a target degree of superheat, namely, SH11 for the temperature section [ Tmax, T11], SH12 and … for the temperature section (T11, T12), and SH1n for the temperature section (T1 n, Tmin ].
Accordingly, the target degree of superheat SH11 corresponds to the target air volume V1, the target degree of superheat SH12 corresponds to the target air volumes V2, …, and the target degree of superheat SH1n corresponds to the target air volume Vn.
In another specific embodiment, taking the temperature rise of the environmental test equipment as an example:
when the in-box temperature of the environmental test apparatus falls from the lower limit temperature Tmin to the upper limit temperature Tmax, the temperature range between the lower limit temperature Tmin to the upper limit temperature Tmax is divided into several temperature sections: [ Tmin, T21], (T21, T22, …, (T2 n, Tmax) corresponding to each of the temperature sections, wherein the target degree of superheat corresponding to the temperature section [ Tmin, T21] is SH21, the target degree of superheat corresponding to the temperature section [ T21, T22] is SH22, …, and the target degree of superheat corresponding to the temperature section [ T2n, Tmax ] is SH2 n.
Accordingly, the target degree of superheat SH21 corresponds to the target air volume V1, the target degree of superheat SH22 corresponds to the target air volumes V2, …, and the target degree of superheat SH2n corresponds to the target air volume Vn.
As shown in fig. 2, in a more specific implementation scenario, for example: when the temperature in the box of the environmental test equipment is rapidly reduced from high temperature (such as 150 ℃) to low temperature (such as minus 40 ℃), the temperature range is divided into a plurality of temperature sections. For example, the target superheat degree in the temperature range [150 ℃, X1] is SH1, the target superheat degree in the temperature range (X1, X2) is SH2, the target superheat degree in the temperature range (X2, -40 ℃) is sh3, the control module 6 controls the fan 3 to reduce the air volume to V1 when the target superheat degree is SH1, the control module 6 controls the fan 3 to adjust the air volume to V2 when the target superheat degree is SH2, and the control module 6 controls the fan 3 to increase the air volume to SH3 when the target superheat degree is SH 3.
That is, in the process of reducing the temperature in the box of the environmental test equipment from high temperature to low temperature, the control module 6 gradually controls the fan 3 to operate at different rotating speeds based on the current air suction temperature so as to achieve the purpose of adjusting the output air volume.
The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.
Claims (5)
1. An environmental test device control method based on suction superheat degree and air volume partition comprises the following steps: the temperature sensor is arranged on the pipeline and is positioned at the upstream of the inlet end of the compressor; a fan capable of adjusting output air volume is arranged on one side of the evaporator, and the fan is controlled by a control module to rotate at a controlled speed; the control method is characterized by comprising the following steps:
matching a target superheat degree in a preset data set based on the current suction temperature acquired by the temperature sensor;
and controlling the fan to adjust to the corresponding target air volume according to the matched target superheat degree.
2. The control method of an environmental test apparatus based on division of intake air superheat and air volume according to claim 1, wherein the target superheat is associated with an in-box load of the environmental test apparatus, the target air volume is inversely related to the in-box load, and the larger the in-box load is, the smaller the target air volume is.
3. The control method of environmental test equipment based on intake superheat and air volume partition according to claim 1, wherein the preset data set is obtained by:
when the internal temperature of the environment test device changes from a first extreme temperature T1 to a second extreme temperature T2, the temperature range from the first extreme temperature T1 to the second extreme temperature T2 is divided into a plurality of temperature sections, which are respectively: the superheat degree of the liquid refrigerant is determined by a first temperature section [ T1, T11], a second temperature section (T11, T12, … and an nth temperature section (T1 n, T2), wherein each temperature section corresponds to a target superheat degree, namely, the first temperature section [ T1, T11] corresponds to a first target superheat degree SH1, the second temperature section (T11, T12) corresponds to a second target superheat degree SH2, …, and the nth temperature section (T1 n, Tmin) corresponds to an nth target superheat degree SHn.
4. The control method of environment testing equipment based on intake superheat degree and air volume partition according to claim 3, wherein the target superheat degree is associated with the target air volume in a one-to-one correspondence manner, namely: the first target superheat SH1 corresponds to the first target air volume V1, the second target superheat SH2 corresponds to the second target air volume V2, …, and the nth target superheat SH2 corresponds to the nth target air volume Vn.
5. An environmental test device based on suction superheat degree and air volume partition, comprising: the temperature sensor is arranged on the pipeline and is positioned at the upstream of the inlet end of the compressor; a fan capable of adjusting output air volume is arranged on one side of the evaporator, and the fan is controlled by a control module to control the rotating speed; the method is characterized in that:
the control module is used for matching a target superheat degree in a preset data set based on the current suction temperature acquired by the temperature sensor; and controlling the fan to adjust to the corresponding target air volume according to the matched target superheat degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010248198.0A CN111457630A (en) | 2020-04-01 | 2020-04-01 | Environment test equipment based on suction superheat degree and air volume partition and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010248198.0A CN111457630A (en) | 2020-04-01 | 2020-04-01 | Environment test equipment based on suction superheat degree and air volume partition and control method thereof |
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| CN103884140A (en) * | 2014-02-21 | 2014-06-25 | 海信（山东）空调有限公司 | Method and system for controlling discharge superheat degree of air conditioning compressor |
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| CN106931639A (en) * | 2017-02-09 | 2017-07-07 | 青岛海尔新能源电器有限公司 | A kind of Teat pump boiler restricting element control method |
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| CN109520136A (en) * | 2017-09-18 | 2019-03-26 | 青岛经济技术开发区海尔热水器有限公司 | Heat pump water heater control method and heat pump water heater |
| CN109612018A (en) * | 2018-11-26 | 2019-04-12 | 宁波奥克斯电气股份有限公司 | A kind of control method and air conditioner adjusting air conditioner discharge superheat |
| CN110595123A (en) * | 2019-08-30 | 2019-12-20 | 浙江中广电器股份有限公司 | Control method of electronic expansion valve in air source variable frequency heat pump system |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05133620A (en) * | 1991-11-12 | 1993-05-28 | Daikin Ind Ltd | Controller of refrigerating device operation |
| JPH10318612A (en) * | 1997-05-19 | 1998-12-04 | Fujitsu General Ltd | Control method for air conditioner |
| CN101600917A (en) * | 2007-02-02 | 2009-12-09 | 开利公司 | Operation has the method for the transport refrigeration unit of remote evaporator |
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| CN103884140A (en) * | 2014-02-21 | 2014-06-25 | 海信（山东）空调有限公司 | Method and system for controlling discharge superheat degree of air conditioning compressor |
| CN105371531A (en) * | 2015-11-30 | 2016-03-02 | 珠海格力电器股份有限公司 | Low-frequency oil return control method and system of air conditioner |
| CN106931639A (en) * | 2017-02-09 | 2017-07-07 | 青岛海尔新能源电器有限公司 | A kind of Teat pump boiler restricting element control method |
| CN107143917A (en) * | 2017-05-03 | 2017-09-08 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
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| CN110595123A (en) * | 2019-08-30 | 2019-12-20 | 浙江中广电器股份有限公司 | Control method of electronic expansion valve in air source variable frequency heat pump system |
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Application publication date: 20200728 |