CN115875839A - Anti-condensation control method and device for cooling pipe and air conditioner - Google Patents
Anti-condensation control method and device for cooling pipe and air conditioner Download PDFInfo
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- CN115875839A CN115875839A CN202211392848.4A CN202211392848A CN115875839A CN 115875839 A CN115875839 A CN 115875839A CN 202211392848 A CN202211392848 A CN 202211392848A CN 115875839 A CN115875839 A CN 115875839A
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- 238000009833 condensation Methods 0.000 title claims abstract description 166
- 238000001816 cooling Methods 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 276
- 230000005494 condensation Effects 0.000 claims abstract description 103
- 239000003507 refrigerant Substances 0.000 claims abstract description 93
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 claims description 26
- 238000004590 computer program Methods 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 20
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- 238000005057 refrigeration Methods 0.000 description 1
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Abstract
The invention discloses an anti-condensation control method and device for a cooling pipe and an air conditioner, and relates to the technical field of air conditioners, wherein the method comprises the following steps: monitoring the outdoor environment temperature and the return water temperature of the heat exchanger after entering the heating mode and running for a first preset time; wherein, the return water temperature is the water temperature at the second inlet of the heat exchanger; judging whether the cooling pipe has a condensation risk or not based on the outdoor environment temperature and the return water temperature, and if so, entering an anti-condensation control mode; during the operation process of the anti-condensation control mode, the outlet pipe temperature of the heat exchanger is monitored, and the rotating speed of the water pump is controlled based on the outlet pipe temperature and the outdoor environment temperature so as to control the temperature of the refrigerant in the cooling pipe to be within a preset temperature range; wherein, the outlet pipe temperature is the temperature of the refrigerant at the first outlet of the heat exchanger. The invention can avoid the over-high or over-low temperature of the cooling pipe, prevent the condensation of the cooling pipe, simultaneously avoid the damage of the controller caused by the over-high temperature of the medium in the cooling pipe, and improve the operation reliability of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an anti-condensation control method and device for a cooling pipe and an air conditioner.
Background
The controller can generate heat in the operation process of the air conditioner, if the heat is not radiated in time, the temperature of the controller can rise, and the reliability of the controller is affected, so that the heat radiation and the temperature reduction of the controller are very necessary. The existing controller heat dissipation technology is generally used for heat dissipation of the controller through a refrigerant cooling pipe, and in order to improve the heat dissipation effect of the controller, the refrigerant in the cooling pipe needs to be reduced to a lower temperature.
Disclosure of Invention
In order to solve the problems, the invention provides a condensation prevention control method and device for a cooling pipe and an air conditioner, which can ensure that a refrigerant entering the refrigerant pipe is within a reasonable temperature range, avoid overhigh or overlow temperature of the cooling pipe, prevent condensation of the cooling pipe, simultaneously avoid damage to a controller caused by overhigh temperature of the refrigerant in the cooling pipe, and improve the operation reliability of the air conditioner.
According to the embodiment of the invention, on one hand, the invention provides an anti-condensation control method of a cooling pipe, which is applied to an air conditioner, wherein a water machine system of the air conditioner comprises a heat exchanger, the cooling pipe and a water pump; the first inlet of the heat exchanger is connected with a four-way valve through a pipeline, the first outlet of the heat exchanger is connected with the cooling pipe through a pipeline, the first inlet and the first outlet are communicated in the heat exchanger, the second inlet of the heat exchanger is connected with a water source through a pipeline, the second outlet of the heat exchanger is used for outputting water subjected to heat exchange through a pipeline, the water pump is arranged between the second inlet and the water source, and the condensation prevention control method of the cooling pipe comprises the following steps: monitoring the outdoor environment temperature and the return water temperature of the heat exchanger after entering the heating mode and running for a first preset time; the return water temperature is the water temperature at a second inlet of the heat exchanger; judging whether the cooling pipe has condensation risk or not based on the outdoor environment temperature and the return water temperature, and if so, entering an anti-condensation control mode; in the anti-condensation control mode operation process, the outlet pipe temperature of the heat exchanger is monitored, and the rotating speed of the water pump is controlled on the basis of the outlet pipe temperature and the outdoor environment temperature so as to control the temperature of the refrigerant in the cooling pipe to be within a preset temperature range; and the outlet pipe temperature is the temperature of a refrigerant at a first outlet of the heat exchanger.
Through adopting the above technical scheme, judge whether there is the condensation risk in the cooling tube according to the return water temperature of heat exchanger and outdoor ambient temperature, the accuracy of cooling tube condensation judgement has been promoted, through the rotational speed of the exit tube temperature control water pump according to outdoor ambient temperature and heat exchanger after getting into the condensation control mode of preventing, can control the water flow velocity that the water source got into the heat exchanger, thereby improve the refrigerant heat transfer effect in the heat exchanger, the exit tube temperature of control heat exchanger, ensure that the refrigerant that gets into the refrigerant pipe is in reasonable temperature range, avoid the refrigerant temperature in the cooling tube too high or cross lowly, prevent the cooling tube condensation, avoid the too high messenger controller of refrigerant temperature in the cooling tube to damage simultaneously, the reliability of air conditioner operation has been promoted.
Preferably, the step of judging whether the cooling pipe has a condensation risk based on the outdoor environment temperature and the return water temperature, and if so, controlling the water pump to operate at a first preset rotating speed comprises the steps of: if the outdoor ambient temperature T Outer ring And the return water temperature T Return water Satisfy T Return water ≤T Outer ring -△T 1 Determining that the cooling pipe has a condensation risk, and controlling the water pump to operate at a first preset rotating speed; wherein, Δ T 1 Is a first predetermined temperature.
Through adopting above-mentioned technical scheme, judge that the cooling tube has the condensation risk when the return water temperature is less than outdoor ambient temperature and the difference of first predetermined temperature, promoted the accuracy that the cooling tube condensation was judged.
Preferably, the anti-condensation control method for the cooling pipe further includes: judging the outdoor environment temperature T in the anti-condensation control mode operation process Outer ring And the return water temperature T Return water Whether or not T is satisfied Return water ≥T Outer ring +△T 2 If yes, exiting the anti-condensation control mode; wherein, Δ T 2 Is a second preset temperature; if T is Return water ＜T Outer ring +△T 2 Keeping the anti-condensation control mode to operate, detecting the outlet pipe temperature and the outdoor environment temperature of the heat exchanger, and when T is reached Outlet pipe ≥T Outer ring +△T 3 When the water pump is in the running state, the rotating speed of the water pump is controlled to be increased to a first rotating speed to run, and when T is reached Outlet pipe ＜T Outer ring +△T 3 When the water pump is started, the rotating speed of the water pump is controlled to be kept unchanged; wherein, delta T 3 Is a third preset temperature.
Through adopting above-mentioned technical scheme, when the return water temperature is greater than the sum of outdoor ambient temperature and the second predetermined temperature, confirm that the cooling tube does not have condensation risk control air conditioner and withdraws from and prevent condensation control mode to guarantee the normal operating of air conditioner, through when unsatisfied withdrawal condition, further according to exit tube temperature and outdoor ambient temperature control water pump rotational speed, avoid the low condensation water that produces of refrigerant cooling tube temperature to lead to the controller to damage.
Preferably, the step of monitoring the outlet pipe temperature of the heat exchanger and controlling the rotation speed of the water pump based on the outlet pipe temperature and the outdoor environment temperature during the operation in the anti-condensation control mode includes: after the anti-condensation control mode is started and the operation is carried out for a second preset time, the anti-condensation stable detection stage is started, and the current outlet pipe temperature is detected; if it isThe current outlet pipe temperature T Outlet pipe And the outdoor ambient temperature T Outer ring Satisfy T Outlet pipe ≥T Outer ring +△T 3 Controlling the rotation speed of the water pump to increase the second rotation speed for operation; wherein, delta T 3 Is the third preset temperature.
By adopting the technical scheme, the method is characterized in that T is Outlet pipe ≥T Outer ring +△T 3 The rotating speed of the water pump is controlled to be increased, the heat exchange effect of the refrigerant in the heat exchanger can be enhanced, the heating capacity of the air conditioner is improved, and the heating effect of the air conditioner is improved.
Preferably, the anti-condensation control method for the cooling pipe further includes: if the current outlet pipe temperature T Outlet pipe And the outdoor ambient temperature T Outer ring Satisfy T Outlet pipe ≤T Outer ring -△T 4 Controlling the rotating speed of the water pump to reduce the third rotating speed for operation; wherein, delta T 4 Is a fourth preset temperature.
By adopting the technical scheme, the method is implemented at T Outlet pipe ≤T Outer ring -△T 4 During the time, the rotational speed of control water pump reduces, can reduce the refrigerant heat transfer effect in the heat exchanger, improves the exit tube temperature of heat exchanger, and then can prevent that the cooling tube from producing the condensation.
Preferably, the anti-condensation control method for the cooling pipe further includes: if the current outlet pipe temperature T Outlet pipe And the outdoor ambient temperature T Outer ring Satisfy T Outer ring -△T 4 ＜T Outlet pipe ＜T Outer ring +△T 3 And controlling the rotation speed of the water pump to be kept unchanged.
By adopting the technical scheme, the method is characterized in that T is Outer ring -△T 4 ＜T Outlet pipe ＜T Outer ring +△T 3 When the air conditioner is used, the rotating speed of the water pump is controlled to be unchanged, the temperature of the outlet pipe can be controlled within a proper range, and then the temperature of the cooling pipe is controlled within a reasonable temperature range, so that the air conditioner can exert the maximum heating capacity while the refrigerant cooling pipe is prevented from generating condensation.
Preferably, the first preset rotating speed is 30% -70% of the rated rotating speed of the water pump.
Through adopting above-mentioned technical scheme, control the water pump with lower rotational speed operation after getting into the condensation control mode of preventing, can promote the temperature of cooling tube, prevent that the cooling tube from producing the condensation.
According to an embodiment of the invention, on the other hand, the condensation prevention control device for the cooling pipe is provided and applied to the air conditioner, and the water machine system of the air conditioner comprises a heat exchanger, the cooling pipe and a water pump; the first import of heat exchanger passes through the pipeline and is connected with the cross valve, the first export of heat exchanger pass through the pipeline with the cooling tube is connected, first import with first export is in the inside intercommunication of heat exchanger, the second import of heat exchanger passes through the pipeline and is connected with the water source, the second export of heat exchanger is used for passing through the pipeline output with the water after the heat transfer, the water pump set up in the second import with between the water source, the condensation controlling means that prevents of cooling tube includes: the monitoring module is used for monitoring the outdoor environment temperature and the return water temperature of the heat exchanger after the heating mode is started to operate for a first preset time; wherein the return water temperature is the water temperature at the second inlet of the heat exchanger; the judging module is used for judging whether the cooling pipe has condensation risks or not based on the outdoor environment temperature and the return water temperature, and if yes, the cooling pipe enters an anti-condensation control mode; the control module is used for monitoring the outlet pipe temperature of the heat exchanger in the anti-condensation control mode operation process, and controlling the rotating speed of the water pump based on the outlet pipe temperature and the outdoor environment temperature so as to control the temperature of a refrigerant in the cooling pipe to be within a preset temperature range; and the outlet pipe temperature is the refrigerant temperature at the first outlet of the heat exchanger.
According to an embodiment of the present invention, in another aspect, an air conditioner is provided, including a heat exchanger, a cooling pipe, a water pump, and a computer readable storage medium and a processor storing a computer program, where a first inlet of the heat exchanger is connected to a four-way valve through a pipeline, a first outlet of the heat exchanger is connected to the cooling pipe through a pipeline, the first inlet and the first outlet are communicated inside the heat exchanger, a second inlet of the heat exchanger is connected to a water source through a pipeline, a second outlet of the heat exchanger is used for outputting water after heat exchange through a pipeline, the water pump is disposed between the second inlet and the water source, and when the computer program is read and executed by the processor, the method according to any one of the first aspect is implemented.
According to an embodiment of the present invention, in another aspect, a computer-readable storage medium is provided, which stores a computer program, which when read and executed by a processor, implements the method according to any one of the first aspect.
The invention has the following beneficial effects: whether condensation risk exists in the cooling pipe is judged through return water temperature and the outdoor ambient temperature according to the heat exchanger, the accuracy of cooling pipe condensation judgement has been promoted, through the rotational speed of the exit tube temperature control water pump according to outdoor ambient temperature and heat exchanger after getting into the condensation control mode of preventing, can control the water flow velocity that the water source got into the heat exchanger, thereby improve the refrigerant heat transfer effect in the heat exchanger, the exit tube temperature of control heat exchanger, the refrigerant of ensureing to get into the refrigerant pipe is in reasonable temperature range, avoid the refrigerant temperature in the cooling pipe too high or low excessively, prevent the cooling pipe condensation, avoid the refrigerant temperature too high messenger controller to damage in the cooling pipe simultaneously, the reliability of air conditioner operation has been promoted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, the proportions, the sizes, and the like shown in the specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical essence, and any modifications of the structures, changes of the proportion relation, or adjustments of the sizes, should still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention.
FIG. 1 is a schematic structural diagram of a water machine system of an air conditioner according to the present invention;
FIG. 2 is a flow chart of a condensation prevention control method for a cooling pipe according to the present invention;
FIG. 3 is a control flow chart for preventing the coolant cooling pipe of the water machine from being condensed according to the present invention;
fig. 4 is a schematic structural view of an anti-condensation control device for a cooling pipe according to the present invention.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment provides an air conditioner, referring to a schematic structural diagram of a water machine system of the air conditioner shown in fig. 1, the water machine system includes: the system comprises a gas-liquid separator 10, a compressor 11, a four-way valve 12, a condenser 13, a check valve group (comprising a check valve 141, a check valve 142, a check valve 143 and a check valve 144), an electronic expansion valve 15, a heat exchanger 16, a water pump 17, an outer ring temperature sensor 18, a refrigerant cooling pipe 19, a heat exchanger inlet pipe temperature sensor 20, a heat exchanger outlet pipe temperature sensor 21, a return water temperature sensor 22 and an outlet water temperature sensor 23.
As shown in fig. 1, a first inlet of the heat exchanger 16 is connected to a C-end of the four-way valve 12 through a pipeline, a first outlet of the heat exchanger 16 is connected to the cooling pipe 19 through a pipeline, the check valve set is disposed between the heat exchanger and the cooling pipe, the first inlet and the first outlet of the heat exchanger 16 are communicated with each other inside the heat exchanger, the internal pipeline is in a curved shape, a second inlet of the heat exchanger 16 is connected to a water source through a pipeline, a second outlet of the heat exchanger 16 is used for outputting water after heat exchange through a pipeline, and the water pump 17 is disposed between the second inlet of the heat exchanger and the water source.
The heat exchanger may be a plate heat exchanger. The heat exchanger inlet pipe temperature sensor 20 is arranged at a first inlet (i.e., a port connected with the four-way valve) of the heat exchanger 16, the heat exchanger outlet pipe temperature sensor 21 is arranged at a first outlet (i.e., a port connected with the check valve) of the heat exchanger, the return water temperature sensor 22 is arranged at a second inlet (i.e., a port connected with a water source) of the heat exchanger 16, and the outlet water temperature sensor 23 is arranged at a second outlet of the heat exchanger.
The function of the check valve group is to control the flow direction of the refrigerant in the refrigeration/heating mode, and ensure that the refrigerant passes through the refrigerant cooling pipe and then passes through the electronic expansion valve. If the refrigerant passes through the electronic expansion valve for throttling and then passes through the refrigerant cooling pipe, the temperature of the refrigerant cooling pipe is very low, the risk of condensation exists, and the controller is easy to damage due to the fact that condensation water enters. The heat exchanger is used for exchanging heat between water in a water source and a refrigerant to generate cold water and hot water, the water pump is used for providing power for water circulation, and the flow of the water can be changed by controlling the rotating speed of the water pump.
The effect of refrigerant cooling tube is for the controller heat dissipation, and the refrigerant temperature in the refrigerant cooling tube needs be suitable temperature, if the temperature too low has the risk of condensation, can lead to electronic components to damage in the condensation water gets into the controller. The temperature of the refrigerant in the refrigerant cooling pipe is too high, which causes poor heat dissipation effect of the controller, and the controller is damaged due to high temperature.
During heating operation of the air conditioner, the refrigerant circulation direction is the discharge port of the compressor 11 → the D-tube of the four-way valve 12 → the C-tube of the four-way valve 12 → the first inlet of the heat exchanger 16 → the first outlet of the heat exchanger 16 → the check valve 143 → the refrigerant cooling tube 19 → the electronic expansion valve 15 → the check valve 141 → the condenser 13 → the E-tube of the four-way valve 12 → the S-tube of the four-way valve 12 → the gas-liquid separator 10 → the return port of the compressor 11. The refrigerant entering the heat exchanger is a high-temperature and high-pressure gaseous refrigerant, and the refrigerant is heated in the heat exchanger to generate hot water. The refrigerant releases heat in the heat exchanger, the temperature is reduced, and the refrigerant changes from a gas state to a liquid state. The inventor researches and discovers that the temperature of the refrigerant of the outlet pipe of the refrigerant cooling pipe is influenced by the water temperature and the water flow of the return water of the heat exchanger, when the water flow of the return water of the heat exchanger (namely the water temperature in the pipeline at the second inlet) is very low, the temperature of the refrigerant of the first outlet pipe of the heat exchanger is low, the temperature of the refrigerant cooling pipe is close to the temperature of the outlet pipe of the heat exchanger, and when the temperature of the refrigerant cooling pipe is lower than the temperature of the outer ring, the risk of condensation is generated.
The present embodiment provides a condensation prevention control method for a cooling pipe, which can be applied to the air conditioner provided in the above embodiment, referring to a flow chart of the condensation prevention control method for a cooling pipe shown in fig. 2, the method mainly includes the following steps S102 to S106:
step S102: and monitoring the outdoor environment temperature and the return water temperature of the heat exchanger after entering the heating mode and running for a first preset time.
The return water temperature is the water temperature at the second inlet of the heat exchanger, i.e. the temperature of the water entering the second inlet of the heat exchanger. The first preset time t 1 Can be t 1 The water pump is started after the air conditioner enters the heating mode to operate, the water pump operates according to the normal rotating speed to circulate water, the air conditioner enters a stable operation state after the air conditioner operates for a first preset time, and the return water temperature sensor can accurately detect the return water temperature of the heat exchanger.
Step S104: and judging whether the cooling pipe has a condensation risk or not based on the outdoor environment temperature and the return water temperature, and if so, entering an anti-condensation control mode.
When the return water temperature that gets into the heat exchanger by the water source is lower, the absorptive refrigerant heat of water in the heat exchanger is more, can lead to the refrigerant temperature that gets into the cooling tube by the heat exchanger lower, leads to the cooling tube to have the risk that produces the condensation, begins to prevent condensation control to the cooling tube, can be through the rotational speed that reduces the water pump or control the water pump and with lower rotational speed operation to avoid the cooling tube to produce the condensation.
Step S106: in the anti-condensation control mode operation process, the outlet pipe temperature of the heat exchanger is monitored, and the rotating speed of the water pump is controlled based on the outlet pipe temperature and the outdoor environment temperature so as to control the temperature of the refrigerant in the cooling pipe to be within a preset temperature range.
The outlet pipe temperature is the temperature of the refrigerant in the pipeline at the first outlet of the heat exchanger. In the process of the air conditioner running in a condensation prevention mode, the outlet pipe temperature of the first outlet of the heat exchanger is detected in real time based on the temperature sensor, the rotating speed of the water pump is further controlled according to the size relation between the outlet pipe temperature and the outdoor environment temperature, the rotating speed of the water pump is increased when the outlet pipe temperature is far higher than the outdoor environment temperature, the cooling pipe temperature is prevented from being too high, the rotating speed of the water pump is controlled to be reduced when the outlet pipe temperature is far lower than the outdoor environment temperature, the cooling pipe temperature is prevented from being too low, the temperature of the cooling pipe is enabled to be in a reasonable temperature range, the reasonable temperature range is related to the outdoor environment temperature, the temperature can be floated up and down at the outdoor environment temperature, and the cooling pipe can help the controller to dissipate heat and cannot generate condensation.
According to the condensation prevention control method for the cooling pipe, whether condensation risks exist in the cooling pipe is judged according to the return water temperature and the outdoor environment temperature of the heat exchanger, the condensation judgment accuracy of the cooling pipe is improved, the rotating speed of the water pump is controlled according to the outdoor environment temperature and the outlet pipe temperature of the heat exchanger after the cooling pipe enters the condensation prevention control mode, the water flow speed of a water source entering the heat exchanger can be controlled, the heat exchange effect of a refrigerant in the heat exchanger is improved, the outlet pipe temperature of the heat exchanger is controlled, the refrigerant entering the refrigerant pipe is ensured to be within a reasonable temperature range, the refrigerant in the cooling pipe is prevented from being too high or too low, condensation of the cooling pipe is prevented, meanwhile, the controller is prevented from being damaged due to the fact that the refrigerant in the cooling pipe is too high in temperature, and the operation reliability of an air conditioner is improved.
In one embodiment, in order to prevent the cooling pipe from generating condensation, the embodiment provides a specific implementation method that whether condensation risk exists in the cooling pipe is judged based on the outdoor environment temperature and the return water temperature, and if yes, the water pump is controlled to operate at a first preset rotating speed:
if the outdoor ambient temperature T Outer ring And return water temperature T Return water Satisfy T Return water ≤T Outer ring -△T 1 Determining that the cooling pipe has a condensation risk, and controlling the water pump to operate at a first preset rotating speed; wherein, delta T 1 Is a first predetermined temperature. The first preset rotation speed may be a lower rotation speed, such as a rotation speed corresponding to a lowest gear of the water pump, and the first preset temperature Δ T 1 The value of (b) may range from 0 to 5 ℃.
If T Return water ＞T Outer ring -△T 1 And the water pump operates according to normal control, which indicates that the cooling pipe has higher temperature and does not have condensation risk.
The inventor researches and finds that the outlet pipe temperature (namely the refrigerant temperature of the first outlet) of the heat exchanger is usually 3-4 ℃ higher than the return water temperature, and the condensation risk of the cooling pipe is judged when the return water temperature is lower than the difference value between the outdoor environment temperature and the first preset temperature, so that the condensation judgment accuracy of the cooling pipe is improved.
In a specific embodiment, the first preset rotation speed is 30% to 70% of a rated rotation speed of the water pump, that is, a value range of the first preset rotation speed is: the rated rotating speed is 30% -70%, and the water pump is controlled to run at a lower rotating speed after the anti-condensation control mode is started, so that the temperature of the cooling pipe can be increased, and the cooling pipe is prevented from generating condensation.
In an embodiment, the condensation prevention control method for a cooling pipe provided in this embodiment further includes: judging the outdoor environment temperature T in the anti-condensation control mode operation process Outer ring And return water temperature T Return water Whether or not T is satisfied Return water ≥T Outer ring +△T 2 If so, exit the anti-condensation control mode, wherein Δ T 2 Is a second predetermined temperature. If T Return water ＜T Outer ring +△T 2 Keeping the anti-condensation control mode to operate, detecting the outlet pipe temperature and the outdoor environment temperature of the heat exchanger, and when T is reached Outlet pipe ≥T Outer ring +△T 3 When the rotating speed of the water pump is controlled to be increased to a first rotating speed (such as the rotating speed is increased by one gear, or the rotating speed is increased by 10% -30%) when T is Outlet pipe ＜T Outer ring +△T 3 Time, controlThe rotating speed of the water making pump is kept unchanged; wherein, Δ T 3 Is a third preset temperature.
The value range of the third preset temperature is 0-10 ℃, when T is Outlet pipe ≥T Outer ring +△T 3 During operation, the rotating speed of the water pump is increased, heat exchange of a refrigerant in the heat exchanger can be enhanced, the heating effect can be improved, and when T is used Outlet pipe ＜T Outer ring +△T 3 And meanwhile, the rotating speed of the water pump is controlled to be kept unchanged.
The second predetermined temperature DeltaT 2 The value range of the temperature sensor can be 0-5 ℃, in the process that the air conditioner operates in the anti-condensation control mode, whether the return water temperature meets the condition of quitting the anti-condensation control mode or not is detected in real time, when the return water temperature is larger than the sum of the outdoor environment temperature and the second preset temperature, the condition that the air conditioner quits the anti-condensation control mode is controlled by determining that no condensation risk exists in the cooling pipe, normal operation of the air conditioner is guaranteed, and when the quitting condition is not met, the rotating speed of the water pump is further controlled according to the outlet pipe temperature and the outdoor environment temperature, and the condition that the controller is damaged due to condensation water generated due to low temperature of the refrigerant cooling pipe is avoided.
In an embodiment, in order to improve the stability of the anti-condensation control, in this embodiment, an embodiment is provided that, during the operation in the anti-condensation control mode, the outlet pipe temperature of the heat exchanger is monitored, and the rotation speed of the water pump is controlled based on the outlet pipe temperature and the outdoor environment temperature, which may be specifically executed with reference to the following steps (1) to (3):
step (1): after the anti-condensation control mode is started and the operation is carried out for a second preset time, the anti-condensation stable detection stage is started, and the current outlet pipe temperature is detected; if the current outlet pipe temperature T Outlet pipe And outdoor ambient temperature T Outer ring Satisfy T Outlet pipe ≥T Outer ring +△T 3 And controlling the rotation speed of the water pump to increase the second rotation speed to operate.
The value range of the second preset time period can be t2 less than or equal to 10min. The second rotation speed is a gear position increased by the rotation speed, or the value range of the second rotation speed can be rated rotation speed 10% -rated rotation speed 30%. By at T Outlet pipe ≥T Outer ring +△T 3 The rotating speed of the water pump is controlled to be increased, the heat exchange effect of the refrigerant in the heat exchanger can be enhanced, the heating capacity of the air conditioner is improved, and the heating effect of the air conditioner is improved.
Step (2): if the current outlet pipe temperature T Outlet pipe And outdoor ambient temperature T Outer ring Satisfy T Outlet pipe ≤T Outer ring -△T 4 And controlling the rotating speed of the water pump to reduce the third rotating speed for operation.
Wherein, delta T 4 The fourth preset temperature may be set to-5 ℃, and the third rotation speed may be reduced by one gear, or the third rotation speed may be set to 10% to 30% of the rated rotation speed. By at T Outlet pipe ≤T Outer ring -△T 4 During the time, the rotational speed of control water pump reduces, can reduce the refrigerant heat transfer effect in the heat exchanger, improves the exit tube temperature of heat exchanger, and then can prevent that the cooling tube from producing the condensation.
And (3): if the current outlet pipe temperature T Outlet pipe And outdoor ambient temperature T Outer ring Satisfy T Outer ring -△T 4 ＜T Outlet pipe ＜T Outer ring +△T 3 And controlling the rotation speed of the water pump to be unchanged.
By at T Outer ring -△T 4 ＜T Outlet pipe ＜T Outer ring +△T 3 When the air conditioner is used, the rotating speed of the water pump is controlled to be unchanged, the temperature of the outlet pipe can be controlled within a proper range, and then the temperature of the cooling pipe is controlled within a reasonable temperature range, so that the air conditioner can exert the maximum heating capacity while the refrigerant cooling pipe is prevented from generating condensation.
The anti-condensation control method of the above-mentioned cooling pipe that this embodiment provided, through contrast return water temperature, outdoor ambient temperature, judge whether the cooling pipe has the condensation risk, get into when the condensation risk and prevent condensation control, adjust the rotational speed of water pump, control water flow, change the heat transfer effect of refrigerant in the heat exchanger, the exit tube temperature of control heat exchanger, the exit tube temperature that makes the heat exchanger is at reasonable scope with outdoor ambient temperature's the difference in temperature, can prevent refrigerant cooling pipe condensation, guarantee the normal operation of heating of air conditioner simultaneously, the reliability and the stability of air conditioner operation have been promoted.
Corresponding to the condensation prevention control method for the cooling pipe provided in the above embodiment, the embodiment of the present invention provides an example of preventing condensation of a cooling pipe of a coolant of a water machine by applying the condensation prevention control method for the cooling pipe, and refer to a control flowchart for preventing condensation of a cooling pipe of a coolant of a water machine as shown in fig. 3, which can be specifically executed with reference to the following steps:
step 1, starting up a heating machine, and detecting the return water temperature T of a plate heat exchanger (hereinafter referred to as plate heat exchanger) Return water Outlet tube temperature T Outlet pipe Outer ring temperature T Outer ring . After the water pump operation time T1, the compressor is operated, and the T is compared Return water And T Outer ring If T is Return water ＞T Outer ring -△T 1 And the water pump operates under normal control. When T is Return water ≤T Outer ring -△T 1 During the time, judge that the refrigerant cooling tube has the risk of condensation, get into the start stage and prevent condensation control: the water pump is operated at a low speed r1, if T is detected in the process Return water ≥T Outer ring +△T 2 And (4) quitting the anti-condensation control, and operating the water pump according to the normal control. If T is Return water ＜T Outer ring +△T 2 Keeping anti-condensation control at startup stage, and comparing T outlet pipe with T Outer ring When T is Outlet pipe ≥T Outer ring +△T 3 When the water pump rotates at a high speed, the reinforcing plate exchanges heat with the refrigerant to improve the heating effect, and when the T is higher than the T, the water pump rotates at a high speed Outlet pipe ＜T Outer ring +△T 3 In time, the water pump rotation speed remains unchanged.
And 2, entering a stable stage condensation prevention control detection stage after time t2: if the water pump is normally controlled to operate before, T is detected in the process Return water ≤T Outer ring -△T 1 Entering into anti-condensation control, if the anti-condensation control is performed before, detecting T Return water ≥T Outer ring +△T 2 And (4) quitting the anti-condensation control, and operating the water pump according to the normal control. The anti-condensation control water pump operates according to the following control: comparison T Outer ring And T Outlet pipe When T is Outlet pipe ≤T Outer ring -△T 4 When in use, the rotating speed of the water pump is reduced, and the heat exchange effect of the refrigerant in the plate exchange is reducedIncreasing the temperature of the refrigerant discharged from the pipe; when T is Outlet pipe ≥T Outer ring +△T 3 When the water pump is in use, the rotating speed of the water pump is increased, the heat exchange effect of the refrigerant in the heat exchange of the reinforcing plate is enhanced, and the heating capacity is improved; when T is Outer ring -△T 4 ＜T Outlet pipe ＜T Outer ring +△T 3 In time, the water pump rotation speed remains unchanged.
△T 1 、△T 2 、△T 3 、△T 4 Is a preset value when T Return water ≤T Outer ring -△T 1 When the temperature of return water is close to or lower than the temperature of an outer ring, because the temperature of an outlet pipe of a plate exchange refrigerant is usually only 3-4 ℃ higher than that of the return water, a refrigerant cooling pipe has condensation risk and needs to be subjected to T Outlet pipe Detected and controlled (anti-condensation control), delta T 1 The value range is 0-5 ℃. When T is Return water ≥T Outer ring +△T 2 And the return water temperature is higher than the outer ring temperature, the refrigerant cooling pipe is judged to have no condensation risk, and the anti-condensation control can be quitted, so that the temperature of the refrigerant cooling pipe is delta T2:0 to 5 ℃. When T is Outlet pipe ≤T Outer ring -△T 4 The outlet pipe temperature is close to or lower than the outer ring temperature, and the refrigerant cooling pipe has the condensation risk, needs to reduce the water pump rotational speed, improves refrigerant cooling pipe temperature, triangle T4: -5 to 5 ℃. When T is Outlet pipe ≥T Outer ring +△T 3 During the time, the temperature of refrigerant cooling tube is higher, does not have the risk of condensation, can improve the water pump rotational speed this moment, improves heat transfer volume, delta T3 under the condition of guaranteeing that the refrigerant cooling tube is not condensed: 0 to 10 ℃. r1 is a preset value, the value of the r1 is 30-70% of the rated rotating speed of the water pump, and the rotating speed of the water pump at the starting stage of the unit is properly reduced to improve the temperature of the outlet pipe of the plate exchanger under the condition of low return water temperature.
Corresponding to the condensation prevention control method of the cooling pipe provided by the embodiment, the embodiment of the invention provides a condensation prevention control device of the cooling pipe, which can be applied to an air conditioner, wherein a water machine system of the air conditioner comprises a heat exchanger, the cooling pipe and a water pump; the first import of heat exchanger passes through the pipeline and is connected with the cross valve, and the first export of heat exchanger passes through the pipeline and is connected with the cooling tube, and first import and first export are at the inside intercommunication of heat exchanger, and the second import of heat exchanger passes through the pipeline and is connected with the water source, and the second export of heat exchanger is used for passing through the pipeline output with the water after the heat transfer, and the water pump sets up between second import and water source, refer to the condensation controlling means structure sketch map of preventing of cooling tube as shown in fig. 4, and the device includes following module:
the monitoring module 41 is configured to monitor an outdoor environment temperature and a return water temperature of the heat exchanger after entering a heating mode and operating for a first preset time; wherein, the return water temperature is the water temperature at the second inlet of the heat exchanger.
And the judging module 42 is used for judging whether the cooling pipe has condensation risks or not based on the outdoor environment temperature and the return water temperature, and if so, entering an anti-condensation control mode.
The control module 43 is used for monitoring the outlet pipe temperature of the heat exchanger in the anti-condensation control mode operation process, and controlling the rotating speed of the water pump based on the outlet pipe temperature and the outdoor environment temperature so as to control the temperature of the refrigerant in the cooling pipe to be within a preset temperature range; the outlet pipe temperature is the refrigerant temperature at the first outlet of the heat exchanger.
The anti-condensation control device of above-mentioned cooling tube that this embodiment provided, judge whether there is the condensation risk in the cooling tube through the return water temperature and the outdoor ambient temperature according to the heat exchanger, the accuracy of cooling tube condensation judgement has been promoted, through the rotational speed of the exit tube temperature control water pump according to outdoor ambient temperature and heat exchanger after getting into anti-condensation control mode, can control the water flow velocity that the water source got into the heat exchanger, thereby improve the refrigerant heat transfer effect in the heat exchanger, the exit tube temperature of control heat exchanger, ensure that the refrigerant that gets into the refrigerant pipe is in reasonable temperature range, avoid the refrigerant temperature in the cooling tube too high or low excessively, prevent the cooling tube condensation, avoid the too high controller damage of making of refrigerant temperature in the cooling tube simultaneously, the reliability of air conditioner operation has been promoted.
In one embodiment, the determining module 42 is configured to determine if the outdoor ambient temperature T is lower than the predetermined temperature Outer ring And return water temperature T Return water Satisfy T Return water ≤T Outer ring -△T 1 Determining that the cooling pipe has a condensation risk, and controlling the water pump to operate at a first preset rotating speed; wherein, delta T 1 Is a first presetAnd (3) temperature.
In one embodiment, the determining module 42 is configured to determine the outdoor ambient temperature T during the anti-condensation control mode operation Outer ring And return water temperature T Return water Whether or not T is satisfied Return water ≥T Outer ring +△T 2 If yes, exiting the anti-condensation control mode; wherein, Δ T 2 Is a second preset temperature; if T Return water ＜T Outer ring +△T 2 Keeping the anti-condensation control mode to operate, detecting the outlet pipe temperature and the outdoor environment temperature of the heat exchanger, and when T is reached Outlet pipe ≥T Outer ring +△T 3 When the water pump is in the running state, the rotating speed of the water pump is controlled to be increased to a first rotating speed, and when T is reached Outlet pipe ＜T Outer ring +△T 3 When the water pump is in use, the rotating speed of the water pump is controlled to be kept unchanged; wherein, delta T 3 Is a third preset temperature.
In an embodiment, the control module 43 is configured to enter a condensation prevention stable detection stage after entering the condensation prevention control mode and operating for a second preset time period, and detect a current outlet pipe temperature; if the current outlet pipe temperature T Outlet pipe And outdoor ambient temperature T Outer ring Satisfy T Outlet pipe ≥T Outer ring +△T 3 Controlling the rotation speed of the water pump to increase the second rotation speed for operation; wherein, delta T 3 Is the third preset temperature.
In one embodiment, the control module 43 is configured to determine if the current exit tube temperature T is higher than the predetermined threshold Outlet pipe And outdoor ambient temperature T Outer ring Satisfy T Outlet pipe ≤T Outer ring -△T 4 Controlling the rotating speed of the water pump to reduce the third rotating speed for operation; wherein, delta T 4 Is the fourth preset temperature.
In one embodiment, the control module 43 is configured to determine the current exit tube temperature T Outlet pipe And outdoor ambient temperature T Outer ring Satisfy T Outer ring -△T 4 ＜T Outlet pipe ＜T Outer ring +△T 3 And controlling the rotation speed of the water pump to keep unchanged.
In one embodiment, the first preset rotation speed is 30% to 70% of a rated rotation speed of the water pump.
The above-mentioned cooling tube prevent condensation controlling means that this embodiment provided, through contrast return water temperature, outdoor ambient temperature, judge whether the cooling tube has the condensation risk, get into when the condensation risk and prevent condensation control, adjust the rotational speed of water pump, control water flow, change the heat transfer effect of refrigerant in the heat exchanger, the exit tube temperature of control heat exchanger, the exit tube temperature that makes the heat exchanger is at reasonable scope with outdoor ambient temperature's difference in temperature, can prevent refrigerant cooling tube condensation, guarantee the normal operation of heating of air conditioner simultaneously, the reliability and the stability of air conditioner operation have been promoted.
Corresponding to the condensation prevention control method for the cooling pipe provided by the above embodiment, this embodiment provides an air conditioner, which includes a heat exchanger, a cooling pipe, a water pump, and a computer readable storage medium and a processor storing a computer program, wherein a first inlet of the heat exchanger is connected to a four-way valve through a pipeline, a first outlet of the heat exchanger is connected to the cooling pipe through a pipeline, the first inlet and the first outlet are communicated inside the heat exchanger, a second inlet of the heat exchanger is connected to a water source through a pipeline, the second outlet of the heat exchanger is used for outputting water after heat exchange through a pipeline, the water pump is disposed between the second inlet and the water source, and when the computer program is read and run by the processor, the condensation prevention control method for the cooling pipe provided by the above embodiment is implemented.
The present embodiment further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the above-mentioned embodiment of the condensation prevention control method for a cooling pipe, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The condensation prevention control device for the cooling pipe and the air conditioner disclosed in the embodiment correspond to the condensation prevention control method for the cooling pipe disclosed in the embodiment, so that the description is relatively simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The anti-condensation control method of the cooling pipe is characterized by being applied to an air conditioner, wherein a water machine system of the air conditioner comprises a heat exchanger, the cooling pipe and a water pump;
the first inlet of the heat exchanger is connected with a four-way valve through a pipeline, the first outlet of the heat exchanger is connected with the cooling pipe through a pipeline, the first inlet and the first outlet are communicated in the heat exchanger, the second inlet of the heat exchanger is connected with a water source through a pipeline, the second outlet of the heat exchanger is used for outputting water subjected to heat exchange through a pipeline, the water pump is arranged between the second inlet and the water source, and the condensation prevention control method of the cooling pipe comprises the following steps:
monitoring the outdoor environment temperature and the return water temperature of the heat exchanger after entering the heating mode and running for a first preset time; wherein the return water temperature is the water temperature at the second inlet of the heat exchanger; judging whether the cooling pipe has condensation risk or not based on the outdoor environment temperature and the return water temperature, and if so, entering an anti-condensation control mode;
during the operation process of the anti-condensation control mode, the outlet pipe temperature of the heat exchanger is monitored, and the rotating speed of the water pump is controlled based on the outlet pipe temperature and the outdoor environment temperature so as to control the temperature of the refrigerant in the cooling pipe to be within a preset temperature range; and the outlet pipe temperature is the temperature of a refrigerant at a first outlet of the heat exchanger.
2. The method for controlling condensation prevention of a cooling pipe according to claim 1, wherein the step of judging whether the cooling pipe has a condensation risk based on the outdoor environment temperature and the return water temperature, and if so, controlling the water pump to operate at a first preset rotation speed comprises:
if the outdoor ambient temperature T Outer ring And the return water temperature T Return water Satisfy T Return water ≤T Outer ring -△T 1 Determining that the cooling pipe has a condensation risk, and controlling the water pump to operate at a first preset rotating speed; wherein, delta T 1 Is a first predetermined temperature.
3. The anti-condensation control method for the cooling pipe according to claim 1 or 2, further comprising:
judging the outdoor environment temperature T in the anti-condensation control mode operation process Outer ring And the return water temperature T Return water Whether or not T is satisfied Return water ≥T Outer ring +△T 2 If yes, exiting the anti-condensation control mode; wherein, delta T 2 Is a second preset temperature;
if T Return water ＜T Outer ring +△T 2 Keeping the anti-condensation control mode to operate, detecting the outlet pipe temperature and the outdoor environment temperature of the heat exchanger, and when T is reached Outlet pipe ≥T Outer ring +△T 3 When the water pump is in the running state, the rotating speed of the water pump is controlled to be increased to a first rotating speed to run, and when T is reached Outlet pipe ＜T Outer ring +△T 3 When the water pump is started, the rotating speed of the water pump is controlled to be kept unchanged; wherein, delta T 3 Is the third preset temperature.
4. The method of claim 1, wherein the step of monitoring an outlet pipe temperature of the heat exchanger and controlling a rotational speed of the water pump based on the outlet pipe temperature and the outdoor ambient temperature during the anti-condensation control mode of operation comprises:
after the anti-condensation control mode is started and the operation is carried out for a second preset time, a condensation prevention stable detection stage is started, and the current outlet pipe temperature is detected;
if the current outlet pipe temperature T Outlet pipe And the outdoor ambient temperature T Outer ring Satisfy T Outlet pipe ≥T Outer ring +△T 3 Controlling the rotation speed of the water pump to increase the second rotation speed for operation; wherein, delta T 3 Is the third preset temperature.
5. The anti-condensation control method for a cooling pipe according to claim 4, further comprising:
if the current outlet pipe temperature T Outlet pipe And the outdoor ambient temperature T Outer ring Satisfy T Outlet pipe ≤T Outer ring -△T 4 Controlling the rotating speed of the water pump to reduce the third rotating speed for operation; wherein, delta T 4 Is a fourth preset temperature.
6. The anti-condensation control method for a cooling pipe according to claim 5, further comprising:
if the current outlet pipe temperature T Outlet pipe And the outdoor ambient temperature T Outer ring Satisfy T Outer ring -△T 4 ＜T Outlet pipe ＜T Outer ring +△T 3 And controlling the rotation speed of the water pump to be kept unchanged.
7. The method of claim 2, wherein the first predetermined rotational speed is 30% to 70% of a rated rotational speed of the water pump.
8. The condensation prevention control device of the cooling pipe is characterized by being applied to an air conditioner, wherein a water machine system of the air conditioner comprises a heat exchanger, the cooling pipe and a water pump; the first import of heat exchanger passes through the pipeline and is connected with the cross valve, the first export of heat exchanger pass through the pipeline with the cooling tube is connected, first import with first export is in the inside intercommunication of heat exchanger, the second import of heat exchanger passes through the pipeline and is connected with the water source, the second export of heat exchanger is used for passing through the pipeline output with the water after the heat transfer, the water pump set up in the second import with between the water source, the condensation controlling means that prevents of cooling tube includes:
the monitoring module is used for monitoring the outdoor environment temperature and the return water temperature of the heat exchanger after the heating mode is started to operate for a first preset time; wherein the return water temperature is the water temperature at the second inlet of the heat exchanger;
the judging module is used for judging whether the cooling pipe has condensation risks or not based on the outdoor environment temperature and the return water temperature, and if yes, entering an anti-condensation control mode;
the control module is used for monitoring the outlet pipe temperature of the heat exchanger and controlling the rotating speed of the water pump based on the outlet pipe temperature and the outdoor environment temperature in the anti-condensation control mode operation process so as to control the temperature of a refrigerant in the cooling pipe to be within a preset temperature range; and the outlet pipe temperature is the refrigerant temperature at the first outlet of the heat exchanger.
9. An air conditioner, comprising a heat exchanger, a cooling pipe, a water pump, and a computer readable storage medium and a processor storing a computer program, wherein a first inlet of the heat exchanger is connected to a four-way valve through a pipeline, a first outlet of the heat exchanger is connected to the cooling pipe through a pipeline, the first inlet and the first outlet are communicated inside the heat exchanger, a second inlet of the heat exchanger is connected to a water source through a pipeline, a second outlet of the heat exchanger is used for outputting heat-exchanged water through a pipeline, the water pump is disposed between the second inlet and the water source, and the computer program is read by the processor and when the computer program is executed, the method according to any one of claims 1-7 is implemented.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-7.
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