CN117628675A - Fresh air conditioning system and temperature and humidity control method - Google Patents
Fresh air conditioning system and temperature and humidity control method Download PDFInfo
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- CN117628675A CN117628675A CN202311670288.9A CN202311670288A CN117628675A CN 117628675 A CN117628675 A CN 117628675A CN 202311670288 A CN202311670288 A CN 202311670288A CN 117628675 A CN117628675 A CN 117628675A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 239000003507 refrigerant Substances 0.000 claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides a fresh air conditioning system and a temperature and humidity control method, wherein the fresh air conditioning system comprises a refrigeration station and an air conditioner which are mutually communicated, the air conditioner is provided with an air outlet and an air inlet, the air outlet is arranged towards the indoor, the air inlet is communicated with the outdoor, and the fresh air conditioning system further comprises: the plurality of control valves are arranged in parallel, and the refrigeration station, the plurality of control valves and the air conditioner are sequentially connected to form a refrigerant circulation loop; the first detection component is arranged at the air inlet and used for detecting the temperature and the humidity of the air inlet and is connected with the plurality of control valves; the second detection part is arranged at the air outlet and used for detecting the air outlet temperature and humidity of the air conditioner, and the second detection part is connected with the control valves so as to control the opening degrees of the control valves according to the air inlet temperature and humidity and the air outlet temperature and humidity. The invention solves the problem of untimely indoor temperature and humidity adjustment when a fresh air conditioner is adopted in the prior art.
Description
Technical Field
The invention relates to the technical field of temperature and humidity regulation, in particular to a fresh air conditioning system and a temperature and humidity control method.
Background
The existing air conditioner temperature and humidity regulation technology adopts an electric valve with the same percentage to regulate the flow of a cold source, so that the temperature and humidity of supply air or the temperature and humidity of workshop air also tend to a preset target value, the temperature of the workshop fluctuates within a preset range, the temperature and humidity of the workshop tend to be stable, and the control method is effective for a stable air treatment mode, such as a circulating air conditioning mode.
The greatest difference between the fresh air conditioning mode and the circulating air conditioning mode is that the processed air parameters of the fresh air conditioning are changed every moment, and the outside weather is changed instantaneously in a few minutes or even shorter, so that the condition is obviously that the constant temperature and humidity of a workshop are ensured by a conventional control method (a method for adjusting the flow of a cold source by adopting an equal-percentage electric valve), and the condition is difficult to realize. Because the equal percentage adjustment control is a period requiring 'sampling-comparison-calculation-execution', wherein the execution process is that the PLC calculates through PID time, PID adjustment is generally carried out for 10-30 min, the PID adjustment is slow, in the adjustment time, the weather is possibly another state, the adjustment is not completed before waiting, the new external environment is changed, the temperature and the humidity of the workshop cannot be adjusted in time, the temperature and the humidity of the workshop cannot be stabilized, and the conveying quantity of the refrigerant of the air conditioner cannot be adjusted in time, so that the energy consumption of the air conditioner is high.
Disclosure of Invention
The invention mainly aims to provide a fresh air conditioning system and a temperature and humidity control method, which are used for solving the problem that indoor temperature and humidity adjustment is not timely when a fresh air conditioner is adopted in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a fresh air conditioning system including a refrigerating station and an air conditioner which are communicated with each other, the air conditioner having an air outlet for being disposed toward an indoor side and an air inlet for being communicated with an outdoor side, the fresh air conditioning system further comprising: the plurality of control valves are arranged in parallel, and the refrigeration station, the plurality of control valves and the air conditioner are sequentially connected to form a refrigerant circulation loop; the first detection component is arranged at the air inlet and used for detecting the temperature and the humidity of the air inlet and is connected with the plurality of control valves; the second detection part is arranged at the air outlet and used for detecting the temperature and the humidity of the air outlet, and the second detection part is connected with the control valves so as to control the opening degrees of the control valves according to the temperature and the humidity of the air inlet and the temperature and the humidity of the air outlet.
Further, the fresh air conditioning system includes: the third detection component is used for being arranged indoors and used for detecting the temperature and the humidity of indoor environments; the third detection part is connected with the plurality of control valves so as to control the opening degrees of the plurality of control valves according to the detection result of the third detection part after controlling the opening degrees of the plurality of control valves.
According to another aspect of the present invention, there is provided a temperature and humidity control method, which is applicable to the above fresh air conditioning system, and the temperature and humidity control method includes: detecting the temperature and the humidity of the inlet air, and calculating the enthalpy value of the inlet air according to the temperature and the humidity of the inlet air; detecting the temperature and humidity of the air outlet, and calculating the air enthalpy value according to the temperature and humidity of the air outlet; calculating the difference between the wind enthalpy value and the air inlet enthalpy value to obtain a control enthalpy difference value; and controlling the opening degree of the plurality of control valves according to the control enthalpy difference value.
Further, the method of controlling the opening degrees of the plurality of control valves includes: controlling at least one control valve of the plurality of control valves to be at an initial opening; when the control enthalpy difference value is increased, controlling at least one control valve in the remaining control valves to be quickly opened to a preset opening degree; after at least one control valve in the remaining control valves is controlled to be opened quickly to a preset opening, the initial opening is controlled to be gradually increased; wherein the preset opening is smaller than the initial opening.
Further, the plurality of control valves includes a first control valve and a second control valve, and the method of controlling the opening degree of the plurality of control valves includes: controlling the first control valve to be at an initial opening degree; when the control enthalpy difference value is increased until the control enthalpy difference value is within a first preset range, controlling the second control valve to be quickly opened to a first preset opening degree; when the second control valve is quickly opened to a first preset opening degree, PID control is carried out on the first control valve, so that the opening degree of the first control valve is gradually increased; wherein the first preset opening is smaller than the initial opening.
Further, the first predetermined range is 0-8kj/kg; and/or the value range of the initial opening is 55 to 65 percent; and/or the value range of the first preset opening is 45-55%.
Further, the plurality of control valves includes a third control valve, and the method of controlling the opening degree of the plurality of control valves includes: when the control enthalpy difference value is increased until the control enthalpy difference value is within a second preset range, controlling the third control valve to be quickly opened to a second preset opening degree; when the third control valve is opened quickly to a second preset opening degree, PID control is carried out on the first control valve and/or the second control valve, so that the opening degree of the first control valve and/or the opening degree of the second control valve are increased gradually; wherein the second preset opening is smaller than the first preset opening.
Further, the second predetermined range is 8kj/kg to 16kj/kg; and/or the value range of the second preset opening is 25-35%.
Further, the plurality of control valves includes a fourth control valve, and the method of controlling the opening degree of the plurality of control valves includes: when the control enthalpy difference value is increased until the control enthalpy difference value is within a third preset range, the fourth control valve is controlled to be quickly opened to a third preset opening degree; when the fourth control valve is opened quickly to a third preset opening degree, PID control is carried out on the first control valve and/or the second control valve and/or the third control valve, so that the opening degree of the first control valve and/or the opening degree of the second control valve and/or the opening degree of the third control valve are increased gradually; wherein the third preset opening is smaller than the second preset opening.
Further, the third predetermined range is 16kj/kg to 24kj/kg; and/or the value range of the third preset opening is 15-25%.
Further, the plurality of control valves includes a fifth control valve, and the method of controlling the opening degree of the plurality of control valves includes: when the control enthalpy difference value is increased until the control enthalpy difference value is within a fourth preset range, the fifth control valve is controlled to be quickly opened to a fourth preset opening degree; when the fifth control valve is opened quickly to a fourth preset opening degree, PID control is carried out on the first control valve and/or the second control valve and/or the third control valve and/or the fourth control valve, so that the opening degree of the first control valve and/or the opening degree of the second control valve and/or the opening degree of the third control valve and/or the opening degree of the fourth control valve are gradually increased; wherein the fourth preset opening is smaller than or equal to the third preset opening.
Further, the fourth predetermined range is 24kj/kg to 32kj/kg; and/or the value range of the fourth preset opening is 15-25%.
Further, the plurality of control valves further includes a sixth control valve, and the method of controlling the opening degree of the plurality of control valves includes: when the control enthalpy difference value is increased until the control enthalpy difference value is within a fifth preset range, the sixth control valve is controlled to be opened quickly to a fifth preset opening degree; after the sixth control valve is quickly opened to a fifth preset opening degree, PID control is carried out on the first control valve and/or the second control valve and/or the third control valve and/or the fourth control valve and/or the fifth control valve, so that the opening degree of the first control valve and/or the opening degree of the second control valve and/or the opening degree of the third control valve and/or the opening degree of the fourth control valve and/or the opening degree of the fifth control valve are gradually increased; wherein the fifth preset opening is smaller than or equal to the fourth preset opening.
Further, the fifth predetermined range is 32kj/kg to 40kj/kg; and/or the value range of the fifth preset opening is 15 to 25 percent.
Further, the fresh air conditioning system is the fresh air conditioning system, and the temperature and humidity control method comprises the following steps: detecting the indoor environment temperature and humidity, and calculating the indoor environment enthalpy value according to the indoor environment temperature and humidity; calculating a corrected enthalpy difference between the indoor environment enthalpy value and a preset indoor enthalpy value; after controlling the opening of the plurality of control valves according to the control enthalpy difference value, controlling the opening of the plurality of control valves according to the corrected enthalpy difference value.
Further, the temperature and humidity control method comprises the following steps: when the indoor environment enthalpy value is larger than the preset indoor enthalpy value, controlling the opening degree of at least one control valve in the plurality of control valves to be gradually increased; and when the indoor environment enthalpy value is smaller than the preset indoor enthalpy value, controlling the opening degree of at least one control valve in the plurality of control valves to gradually decrease.
By applying the technical scheme of the invention, the invention provides a fresh air conditioning system, which comprises a refrigeration station and an air conditioner which are mutually communicated, wherein the air conditioner is provided with an air outlet and an air inlet, the air outlet is arranged towards the indoor, the air inlet is communicated with the outdoor, and the fresh air conditioning system further comprises: the plurality of control valves are arranged in parallel, and the refrigeration station, the plurality of control valves and the air conditioner are sequentially connected to form a refrigerant circulation loop; the first detection component is arranged at the air inlet and used for detecting the temperature and the humidity of the air inlet and is connected with the plurality of control valves; the second detection part is arranged at the air outlet and used for detecting the temperature and the humidity of the air outlet, and the second detection part is connected with the control valves so as to control the opening degrees of the control valves according to the temperature and the humidity of the air inlet and the temperature and the humidity of the air outlet. Through the arrangement, the opening degree of the control valves can be adjusted according to the air inlet temperature and humidity and the air outlet temperature and humidity, so that the indoor temperature and humidity can be adjusted timely, and the indoor temperature and humidity tend to be stable. And in combination with the temperature and humidity control method, the opening speed of the control valves is further improved, and the indoor temperature and humidity adjustment is further timely.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic overall structure of an embodiment of a fresh air conditioning system according to the present invention.
Wherein the above figures include the following reference numerals:
1. a refrigeration station; 2. an air conditioner; 3. a control valve; 100. a refrigerant circulation circuit; 4. a first detecting section; 51. a second detecting section; 52. a third detecting section; 31. a first control valve; 32. a second control valve; 33. a third control valve; 34. a fourth control valve; 35. a fifth control valve; 36. a sixth control valve;
6. driving the pump group; 60. driving a pump; 7. a workshop; 8. a controller; 9. and a manual control valve.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, the present invention provides a fresh air conditioning system, which includes a refrigeration station 1 and an air conditioner 2 that are mutually communicated, the air conditioner 2 has an air outlet and an air inlet, the air outlet is configured to be disposed towards an indoor, the air inlet is configured to be communicated with an outdoor, and the fresh air conditioning system further includes: a plurality of control valves 3, the plurality of control valves 3 being arranged in parallel, the refrigeration station 1, the plurality of control valves 3, and the air conditioner 2 being sequentially connected to form a refrigerant circulation circuit 100; the first detection part 4 is arranged at the air inlet, the first detection part 4 is used for detecting the temperature and the humidity of the air inlet, and the first detection part 4 is connected with the plurality of control valves 3; the second detection part 51 is arranged at the air outlet, the second detection part 51 is used for detecting the temperature and the humidity of the air outlet, and the second detection part 51 is connected with the plurality of control valves 3 to control the opening degree of the plurality of control valves 3 according to the temperature and the humidity of the air inlet and the temperature and the humidity of the air outlet. Through the arrangement, the opening degree of the control valves 3 can be adjusted according to the inlet air temperature and humidity and the outlet air temperature and humidity, so that the indoor temperature and humidity can be adjusted timely, and the indoor temperature and humidity tend to be stable.
In this application, the room is a room of the shop 7.
In this application, fresh air conditioning system includes: and a third detecting unit 52, configured to be disposed in a room, wherein the third detecting unit 52 is configured to detect an indoor environment temperature and humidity, and the third detecting unit 52 is connected to the plurality of control valves 3, so as to control the opening of the plurality of control valves 3 according to a detection result of the third detecting unit 52 after controlling the opening of the plurality of control valves 3. Through the arrangement, the temperature and the humidity of the air supply can be further corrected, so that the indoor temperature and the humidity tend to be stable, and the indoor constant temperature control is realized.
The third detecting unit 52 is connected to the second detecting unit 51 to control the opening degrees of the plurality of control valves 3 according to the difference between the third detecting unit 52 and the preset temperature and humidity, and correct the detection result of the second detecting unit 51, so that the accuracy of the detection result of the second detecting unit 51 is ensured.
In the present application, the first detecting member 4, the second detecting member 51, and the third detecting member 52 are all temperature and humidity sensors; and/or the fresh air conditioning system further comprises a controller 8, wherein the controller 8 is connected with the first detection component 4, the second detection component 51 and the third detection component 52 through wires so as to calculate an air inlet enthalpy value, an air outlet enthalpy value and an indoor environment enthalpy value, and the controller controls the opening degrees of the plurality of control valves 3 according to the air inlet enthalpy value, the air outlet enthalpy value and the indoor environment enthalpy value.
In the embodiment of the present application, the controller 8 is a PLC control.
Specifically, the fresh air conditioning system further comprises a driving pump set 6, the driving pump set 6 comprises a plurality of driving pumps 60 which are arranged in parallel, and in the implementation process of the application, when the plurality of control valves 3 are fully opened, the resistance of a pipe network is small, the power is low, and the plurality of driving pumps 60 are opened so as to reduce the running power of a single driving pump 60.
Specifically, the fresh air conditioning system comprises a manual control valve 9, the manual control valve 9 is arranged in parallel with the plurality of control valves 3, when the plurality of control valves 3 are not electrified, the fresh air conditioning system is tested by controlling the opening degree of the manual control valve 9 so as to test whether the fresh air conditioning system has a refrigerating effect or not, and the manual control valve 9 is used during debugging.
The invention also provides a temperature and humidity control method which is suitable for the fresh air conditioning system and comprises the following steps: detecting the temperature and the humidity of the inlet air, and calculating the enthalpy value of the inlet air according to the temperature and the humidity of the inlet air; detecting the temperature and humidity of the air outlet, and calculating the air enthalpy value according to the temperature and humidity of the air outlet; calculating the difference between the wind enthalpy value and the air inlet enthalpy value to obtain a control enthalpy difference value; the opening degree of the plurality of control valves 3 is controlled according to the control enthalpy difference value. The control enthalpy difference value can simultaneously represent the change condition of temperature and humidity, and the indoor temperature and humidity can be adjusted timely by controlling the opening of the enthalpy difference value and controlling the plurality of control valves 3, so that the indoor temperature and humidity tend to be stable.
In the embodiment of the present application, the method of controlling the opening degrees of the plurality of control valves 3 includes: controlling at least one control valve 3 among the plurality of control valves 3 to be at an initial opening degree; when the control enthalpy difference value increases, controlling at least one control valve 3 of the remaining control valves 3 to be opened quickly to a preset opening; after controlling at least one control valve 3 of the remaining control valves 3 to be opened quickly to a preset opening, controlling the initial opening to be gradually increased; wherein the preset opening is smaller than the initial opening. Therefore, the preset opening speed is high, and the opening of the control valve can be quickly adjusted, so that the indoor temperature and humidity can be timely adjusted.
Specifically, the plurality of control valves 3 includes a first control valve 31 and a second control valve 32, and the method of controlling the opening degree of the plurality of control valves 3 includes: controlling the first control valve 31 to be at an initial opening degree; when the control enthalpy difference increases until the control enthalpy difference is within the first predetermined range, the second control valve 32 is controlled to open quickly to the first preset opening degree; when the second control valve 32 is opened quickly to a first preset opening, PID control is performed on the first control valve 31 to gradually increase the opening of the first control valve 31; wherein, the first preset opening is smaller than the initial opening, through the above-mentioned setting, because the first preset opening is smaller than the initial opening for the opening speed of second control valve 32 is faster, and first control valve 31 increases gradually on the basis of initial opening, like this, through the combination of the opening of first control valve and second control valve, make more refrigerant pass through, and the opening of second control valve 32 is less than the initial opening of first control valve 31, like this, the opening speed of second control valve 32 is faster, can guarantee to have more refrigerant to pass through the indoor humiture of quick adjustment.
In order to enable the indoor temperature and humidity to be quickly adjusted, in the embodiment of the application, the first preset range is 0-8kj/kg; and/or the value range of the initial opening is 55 to 65 percent; and/or the value range of the first preset opening is 45-55%.
In the embodiment of the present application, the initial opening degree is 60%; the first preset opening is 50%.
In the embodiment of the present application, the plurality of control valves 3 includes the third control valve 33, and the method of controlling the opening degree of the plurality of control valves 3 includes: when the control enthalpy difference increases until the control enthalpy difference is within the second predetermined range, the third control valve 33 is controlled to open quickly to a second preset opening; after the third control valve 33 is opened quickly to the second preset opening, PID control is performed on the first control valve 31 and/or the second control valve 32, so that the opening of the first control valve 31 and/or the opening of the second control valve 32 are gradually increased; wherein the second preset opening is smaller than the first preset opening. Through the above arrangement, since the second preset opening is smaller than the first preset opening, the opening speed of the third control valve 33 is faster, and the first control valve 31 and/or the second control valve 32 are gradually increased on the basis of the opening of the second control valve and/or the third control valve, so that more refrigerant passes through and the indoor temperature and humidity are quickly adjusted through the combination of the opening of the first control valve, the second control valve and the third control valve.
In order to enable the indoor temperature and humidity to be quickly adjusted, the second preset range is 8kj/kg to 16kj/kg; and/or the value range of the second preset opening is 25-35%.
In the embodiment of the present application, the second preset opening is 30%.
In the present application, the plurality of control valves 3 includes a fourth control valve 34, and the method of controlling the opening degree of the plurality of control valves 3 includes: when the control enthalpy difference increases until the control enthalpy difference is within the third predetermined range, the fourth control valve 34 is controlled to be opened quickly to a third preset opening degree; when the fourth control valve 34 is opened quickly to the third preset opening, PID control is performed on the first control valve 31 and/or the second control valve 32 and/or the third control valve 33, so that the opening of the first control valve 31 and/or the opening of the second control valve 32 and/or the opening of the third control valve 33 are gradually increased; wherein the third preset opening is smaller than the second preset opening. With the above arrangement, since the third preset opening is smaller than the second preset opening, the opening speed of the fourth control valve 34 is faster than the opening speed of the third control valve 33, and the opening of the first control valve 31 and/or the opening of the second control valve 32 and/or the opening of the third control valve 33 are gradually increased on the basis of the opening thereof, so that more refrigerant passes through by the combination of the openings of the first control valve 31 and the second control valve 32 and the openings of the third control valve 33 and the fourth control valve 34, and the indoor temperature and humidity are rapidly adjusted.
In order to enable the indoor temperature and humidity to be quickly adjusted, the third preset range is 16kj/kg to 24kj/kg; and/or the value range of the third preset opening is 15-25%.
In the embodiment of the present application, the third preset opening is 20%.
In the embodiment of the present application, the plurality of control valves 3 includes a fifth control valve 35, and the method of controlling the opening degree of the plurality of control valves 3 includes: when the control enthalpy difference increases until the control enthalpy difference is within a fourth predetermined range, the fifth control valve 35 is controlled to open quickly to a fourth preset opening; when the fifth control valve 35 is opened quickly to the fourth preset opening degree, PID control is performed on the first control valve 31 and/or the second control valve 32 and/or the third control valve 33 and/or the fourth control valve 34, so that the opening degree of the first control valve 31 and/or the opening degree of the second control valve 32 and/or the opening degree of the third control valve 33 and/or the opening degree of the fourth control valve 34 are gradually increased; wherein the fourth preset opening is smaller than or equal to the third preset opening. With the above arrangement, since the fourth preset opening is smaller than the third preset opening, the opening speed of the fifth control valve 35 is faster than that of the fourth control valve 34, and the first to fourth control valves 31 to 34 are gradually increased on the basis of their own opening degrees, so that more refrigerant passes through by the combination of the opening degrees of the first and second control valves and the third and fourth and fifth control valves, and the indoor temperature and humidity are rapidly adjusted.
In order to enable the indoor temperature and humidity to be quickly adjusted, the fourth preset range is 24kj/kg-32kj/kg; and/or the value range of the fourth preset opening is 15-25%.
In the embodiment of the present application, the fourth preset opening is 20%.
In the embodiment of the present application, the plurality of control valves 3 further includes a sixth control valve 36, and the method of controlling the opening degree of the plurality of control valves 3 includes: when the control enthalpy difference value increases until the control enthalpy difference value is within a fifth predetermined range, the sixth control valve 36 is controlled to open quickly to a fifth preset opening; after the sixth control valve 36 is opened quickly to the fifth preset opening degree, PID control is performed on the first control valve 31 and/or the second control valve 32 and/or the third control valve 33 and/or the fourth control valve 34 and/or the fifth control valve 35, so that the opening degree of the first control valve 31 and/or the opening degree of the second control valve 32 and/or the opening degree of the third control valve 33 and/or the opening degree of the fourth control valve 34 and/or the opening degree of the fifth control valve 35 are gradually increased; wherein the fifth preset opening is smaller than or equal to the fourth preset opening. With the above arrangement, since the fifth preset opening is smaller than the fourth preset opening, the opening speed of the sixth control valve 36 is faster than that of the fifth control valve 35, and the first to fifth control valves 31 to 35 are gradually increased on the basis of their own opening, so that more refrigerant passes through and the indoor temperature and humidity are rapidly adjusted by the combination of the opening degrees of the first and second and third control valves.
In order to enable the indoor temperature and humidity to be quickly adjusted, the fifth preset range is 32kj/kg-40kj/kg; and/or the value range of the fifth preset opening is 15 to 25 percent.
In the embodiment of the present application, the fifth preset opening is 20%.
In the embodiment of the application, the fresh air conditioning system is the fresh air conditioning system, and the temperature and humidity control method includes: detecting the indoor environment temperature and humidity, and calculating the indoor environment enthalpy value according to the indoor environment temperature and humidity; calculating a corrected enthalpy difference between the indoor environment enthalpy value and a preset indoor enthalpy value; after controlling the opening degrees of the plurality of control valves 3 according to the control enthalpy difference value, the opening degrees of the plurality of control valves 3 are controlled according to the corrected enthalpy difference value. Through the arrangement, the temperature and humidity of the indoor environment can be further ensured to tend to be stable.
Specifically, the temperature and humidity control method comprises the following steps: when the indoor environment enthalpy value is larger than the preset indoor enthalpy value, controlling the opening degree of at least one control valve 3 in the plurality of control valves 3 to be gradually increased so as to increase the air inlet cold quantity, thereby reducing the indoor temperature and humidity to the preset indoor enthalpy value and ensuring the stability of the indoor environment temperature and humidity; when the indoor environment enthalpy value is smaller than the preset indoor enthalpy value, controlling the opening degree of at least one control valve 3 in the plurality of control valves 3 to be gradually reduced so as to reduce the air inlet cooling capacity and ensure the stability of the indoor environment temperature and humidity.
The preset indoor enthalpy value is calculated by a preset temperature and humidity, and the preset temperature and humidity is the temperature and humidity which needs to be kept indoors.
In the embodiment of the present application, the first control valve 31 is always opened to meet the minimum refrigeration requirement in the refrigeration season, so as to ensure the minimum refrigerant supply.
In the embodiment of the present application, the number of the plurality of control valves 3 is not only 6, and the number of the control valves may be selected according to actual conditions; the circulation capacity and the number of the control valves can be selected according to different workshop air conditioner scales.
Alternatively, the control valve of the present application is an electric valve or a pneumatic valve or a hydraulic valve.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
the invention provides a fresh air conditioning system, which comprises a refrigerating station 1 and an air conditioner 2 which are communicated with each other, wherein the air conditioner 2 is provided with an air outlet and an air inlet, the air outlet is arranged towards the indoor, the air inlet is communicated with the outdoor, and the fresh air conditioning system further comprises: a plurality of control valves 3, the plurality of control valves 3 being arranged in parallel, the refrigeration station 1, the plurality of control valves 3, and the air conditioner 2 being sequentially connected to form a refrigerant circulation circuit 100; the first detection part 4 is arranged at the air inlet, the first detection part 4 is used for detecting the temperature and the humidity of the air inlet, and the first detection part 4 is connected with the plurality of control valves 3; the second detection part 51 is arranged at the air outlet, the second detection part 51 is used for detecting the temperature and the humidity of the air outlet, and the second detection part 51 is connected with the plurality of control valves 3 to control the opening degree of the plurality of control valves 3 according to the temperature and the humidity of the air inlet and the temperature and the humidity of the air outlet. Through the arrangement, the opening degree of the control valves 3 can be adjusted according to the inlet air temperature and humidity and the outlet air temperature and humidity, so that the indoor temperature and humidity can be adjusted timely, and the indoor temperature and humidity tend to be stable. And in combination with the temperature and humidity control method, the opening speed of the control valves is further improved, and the indoor temperature and humidity adjustment is further timely.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. Fresh air conditioning system, including refrigerating station (1) and air conditioner (2) that communicate each other, air conditioner (2) have air outlet and air intake, the air outlet is used for towards indoor setting, the air intake is used for with outdoor intercommunication, its characterized in that, fresh air conditioning system still includes:
a plurality of control valves (3), wherein a plurality of the control valves (3) are arranged in parallel, and the refrigeration station (1), the plurality of control valves (3) and the air conditioner (2) are sequentially connected to form a refrigerant circulation loop (100);
the first detection component (4) is arranged at the air inlet, the first detection component (4) is used for detecting the temperature and the humidity of the air inlet, and the first detection component (4) is connected with a plurality of control valves (3);
the second detection part (51) is arranged at the air outlet, the second detection part (51) is used for detecting the air outlet temperature and humidity of the air conditioner, and the second detection part (51) is connected with a plurality of control valves (3) so as to control the opening degree of the plurality of control valves (3) according to the air inlet temperature and humidity and the air outlet temperature and humidity.
2. The fresh air conditioning system of claim 1, wherein the fresh air conditioning system comprises:
and the third detection component (52) is arranged indoors, the third detection component (52) is used for detecting the indoor environment temperature and humidity, and the third detection component (52) is connected with the control valves (3) so as to control the opening degrees of the control valves (3) according to the detection results of the third detection component (52) after controlling the opening degrees of the control valves (3).
3. A temperature and humidity control method, which is applicable to the fresh air conditioning system according to claim 1 or 2, comprising:
detecting the temperature and the humidity of the inlet air, and calculating the enthalpy value of the inlet air according to the temperature and the humidity of the inlet air;
detecting the temperature and humidity of the air outlet, and calculating the enthalpy value of the air outlet according to the temperature and humidity of the air outlet;
calculating the difference between the air outlet enthalpy value and the air inlet enthalpy value to obtain a control enthalpy difference value;
and controlling the opening degree of a plurality of control valves (3) according to the control enthalpy difference value.
4. A temperature and humidity control method according to claim 3, characterized in that the method of controlling the opening degree of a plurality of said control valves (3) includes:
controlling at least one control valve (3) of a plurality of control valves (3) to be at an initial opening degree;
when the control enthalpy difference value is increased, controlling at least one control valve (3) in the rest control valves (3) to be quickly opened to a preset opening degree;
after controlling at least one control valve (3) of the remaining control valves (3) to be opened quickly to the preset opening, controlling the initial opening to be gradually increased;
wherein the preset opening is smaller than the initial opening.
5. A temperature and humidity control method according to claim 3, wherein the plurality of control valves (3) includes a first control valve (31) and a second control valve (32), and the method of controlling the opening degree of the plurality of control valves (3) includes:
controlling the first control valve (31) to be at an initial opening degree;
when the control enthalpy difference value increases until the control enthalpy difference value is within a first preset range, controlling the second control valve (32) to be opened quickly to a first preset opening degree;
when the second control valve (32) is quickly opened to the first preset opening degree, PID control is carried out on the first control valve (31) so as to gradually increase the opening degree of the first control valve (31);
wherein the first preset opening is smaller than the initial opening.
6. The method for controlling temperature and humidity according to claim 5, wherein,
the first preset range is 0-8kj/kg; and/or the number of the groups of groups,
the value range of the initial opening is 55 to 65 percent; and/or the number of the groups of groups,
the value range of the first preset opening is 45-55%.
7. The temperature and humidity control method according to claim 5, wherein the plurality of control valves (3) includes a third control valve (33), and the method of controlling the opening degree of the plurality of control valves (3) includes:
when the control enthalpy difference value increases until the control enthalpy difference value is within a second predetermined range, controlling the third control valve (33) to open quickly to a second preset opening;
when the third control valve (33) is quickly opened to the second preset opening degree, PID control is performed on the first control valve (31) and/or the second control valve (32) so that the opening degree of the first control valve (31) and/or the opening degree of the second control valve (32) is gradually increased;
wherein the second preset opening is smaller than the first preset opening.
8. The method for controlling temperature and humidity according to claim 7, wherein,
the second predetermined range is 8kj/kg to 16kj/kg; and/or the number of the groups of groups,
the value range of the second preset opening is 25-35%.
9. The temperature and humidity control method according to claim 7, wherein the plurality of control valves (3) includes a fourth control valve (34), and the method of controlling the opening degree of the plurality of control valves (3) includes:
when the control enthalpy difference value increases until the control enthalpy difference value is within a third predetermined range, controlling the fourth control valve (34) to open quickly to a third preset opening;
when the fourth control valve (34) is quickly opened to the third preset opening degree, PID control is performed on the first control valve (31) and/or the second control valve (32) and/or the third control valve (33), so that the opening degree of the first control valve (31) and/or the opening degree of the second control valve (32) and/or the opening degree of the third control valve (33) are gradually increased;
wherein the third preset opening is smaller than the second preset opening.
10. The method for controlling temperature and humidity according to claim 9, wherein,
the third predetermined range is 16kj/kg to 24kj/kg; and/or the number of the groups of groups,
the value range of the third preset opening is 15-25%.
11. A temperature and humidity control method according to claim 9, wherein the plurality of control valves (3) includes a fifth control valve (35), and the method of controlling the opening degree of the plurality of control valves (3) includes:
when the control enthalpy difference value is increased until the control enthalpy difference value is within a fourth preset range, controlling the fifth control valve (35) to be opened quickly to a fourth preset opening degree;
when the fifth control valve (35) is quickly opened to the fourth preset opening degree, PID control is performed on the first control valve (31) and/or the second control valve (32) and/or the third control valve (33) and/or the fourth control valve (34), so that the opening degree of the first control valve (31) and/or the opening degree of the second control valve (32) and/or the opening degree of the third control valve (33) and/or the opening degree of the fourth control valve (34) are gradually increased;
the fourth preset opening degree is smaller than or equal to the third preset opening degree.
12. The method for controlling temperature and humidity according to claim 11, wherein,
the fourth predetermined range is 24kj/kg-32kj/kg; and/or the number of the groups of groups,
the value range of the fourth preset opening is 15 to 25 percent.
13. The temperature and humidity control method according to claim 11, wherein the plurality of control valves (3) further includes a sixth control valve (36), and the method of controlling the opening degree of the plurality of control valves (3) includes:
when the control enthalpy difference value increases until the control enthalpy difference value is within a fifth predetermined range, controlling the sixth control valve (36) to open quickly to a fifth preset opening;
when the sixth control valve (36) is quickly opened to the fifth preset opening degree, PID control is performed on the first control valve (31) and/or the second control valve (32) and/or the third control valve (33) and/or the fourth control valve (34) and/or the fifth control valve (35), so that the opening degree of the first control valve (31) and/or the opening degree of the second control valve (32) and/or the opening degree of the third control valve (33) and/or the opening degree of the fourth control valve (34) and/or the opening degree of the fifth control valve (35) are gradually increased;
wherein the fifth preset opening is smaller than or equal to the fourth preset opening.
14. The method for controlling temperature and humidity according to claim 13, wherein,
the fifth predetermined range is 32kj/kg-40kj/kg; and/or the number of the groups of groups,
the value range of the fifth preset opening is 15 to 25 percent.
15. The method according to any one of claims 3 to 14, wherein the fresh air conditioning system is the fresh air conditioning system according to claim 2, the method comprising:
detecting the indoor environment temperature and humidity, and calculating the indoor environment enthalpy value according to the indoor environment temperature and humidity;
calculating a corrected enthalpy difference between the indoor environment enthalpy value and a preset indoor enthalpy value;
after controlling the opening degree of the plurality of control valves (3) according to the control enthalpy difference value, controlling the opening degree of the plurality of control valves (3) according to the corrected enthalpy difference value.
16. The method according to claim 15, characterized in that the method comprises:
when the indoor environment enthalpy value is larger than the preset indoor enthalpy value, controlling the opening degree of at least one control valve (3) in a plurality of control valves (3) to be gradually increased;
and when the indoor environment enthalpy value is smaller than the preset indoor enthalpy value, controlling the opening degree of at least one control valve (3) in the plurality of control valves (3) to be gradually reduced.
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