Air conditioning water blowing control method with air valve

Abstract

The application discloses a water blowing control method of an air conditioner with a wind valve, and comprises the following steps: S1, after the air conditioner starts working, detecting the dry-bulb temperature Td, the wet-bulb temperature Tw, the evaporation pressure Pe and the opening angle θ of the wind valve in real time, and setting parameters; S2, operating the detected Td, Tw and Pe data to obtain the real-time relative humidity RH% and the real-time evaporation temperature Te; S3, when the data detected in the continuous t1 does not satisfy RH%>RH(set1)% and Td-Te>ΔT, the angle of the wind valve is unchanged, and the condition is continuously judged; S4, if the condition is satisfied, whether RH%>RH(set2)% is satisfied is judged; S5, if the condition is satisfied, the wind valve is adjusted from 90° to θ1, and if the condition is not satisfied, the wind valve is adjusted from 90° to θ2. The reliability of the air conditioner in the data center is improved.

Description

Technical Field

[0001] This invention relates to a method for controlling water blowing in a bottom-discharge air conditioner with a damper. Background Technology

[0002] Currently, air-cooled server room air conditioners still hold a market share of around 60%. Due to the high sensible heat ratio requirements of server room air conditioners, manufacturers generally design lower cooling-to-air ratios, resulting in higher air velocity through the evaporator. This leads to more condensation under high temperature and humidity conditions, which accumulates at the bottom of the evaporator. In applications with bottom-discharge fan units, this causes water blowing near the bottom, affecting the reliability of the data center. Existing patents address this issue by adjusting compressor frequency and fan speed based on supply and return air temperatures and velocities. However, air-cooled server room air conditioners using fixed-frequency compressors and fixed-speed fans still dominate the market, necessitating new innovations to solve the water blowing problem. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing methods and provide a water blowing control method for a bottom-discharge air conditioner with a damper, which improves the reliability of the air conditioner in the data center without increasing the cost.

[0004] The technical solution to achieve the above objectives is:

[0005] A method for controlling water blowing in a down-discharge air conditioner with an air valve, comprising:

[0006] Step S1: After the unit starts working, it performs real-time detection of dry bulb temperature Td, wet bulb temperature Tw, evaporation pressure Pe, and damper opening angle θ, and sets the parameters: first relative humidity setting value RH(set1)%, second relative humidity setting value RH(set2)%, first detection setting time t1, second detection setting time t2, third detection setting time t3, first damper setting angle θ1, second damper setting angle θ2, and dry bulb temperature and evaporation temperature difference setting value ΔT.

[0007] Step S2: Calculate the detected dry-bulb temperature Td, wet-bulb temperature Tw, and evaporation pressure Pe to obtain the real-time relative humidity RH% and the real-time evaporation temperature Te.

[0008] Step S3: When the data detected within the first detection set time t1 does not meet the condition that the relative humidity RH% > the first relative humidity set value RH(set1)% and the dry bulb temperature Td - evaporation temperature Te > the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the damper angle remains unchanged, and the condition is judged again.

[0009] Step S4: After the conditions in step S3 are met, determine whether the relative humidity RH% > the second relative humidity set value RH(set2)% is satisfied.

[0010] Step S5: If the condition is met, the air valve is adjusted from 90° to the first air valve setting angle θ1; if the condition is not met, the air valve is adjusted from 90° to the second air valve setting angle θ2.

[0011] Preferably, in step S1, when the opening angle θ = 0°, the air valve is fully closed, and when the opening angle θ = 90°, the air valve is fully open.

[0012] Preferably, in step S5, if the opening angle θ of the air valve is equal to the set angle θ1 of the first air valve, then:

[0013] Step S51: When the data detected within the second consecutive detection set time t2 does not meet the condition that the relative humidity RH% ≤ the first relative humidity set value RH(set1)%, or the dry bulb temperature Td - evaporation temperature Te ≤ the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the damper angle remains unchanged, and the condition is judged again.

[0014] Step S52: If the conditions in step S51 are met, the air valve is adjusted to 90 degrees by the first air valve setting angle θ1.

[0015] Preferably, in step S5, if the opening angle θ of the air valve is equal to the set angle θ2 of the second air valve, then:

[0016] Step S53: When the data detected within the third consecutive detection set time t3 does not meet the condition that the relative humidity RH% ≤ the first relative humidity set value RH(set1)%, or the dry bulb temperature Td - evaporation temperature Te ≤ the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the air valve angle remains unchanged, and the condition is judged again.

[0017] In step S54, if the conditions in step S53 are met, the air valve is adjusted to 90 degrees by the second air valve setting angle θ2.

[0018] Preferably, the first air valve setting angle θ1, the second air valve setting angle θ2, the first relative humidity setting value RH(set1)% and the second relative humidity setting value RH(set2)% can all be set according to different unit conditions.

[0019] Preferably, when setting parameters, the following conditions should be met: first relative humidity setting value RH(set1)% < second relative humidity setting value RH(set2)%, third detection setting time t3 < second detection setting time t2, and first air valve setting angle θ1 < second air valve setting angle θ2.

[0020] The beneficial effects of this invention are as follows: This invention can control the opening angle of the air valve by detecting the dry bulb temperature Td, wet bulb temperature Tw, and evaporation pressure Pe corresponding to the real-time evaporation temperature Te in the unit without increasing the cost, and thus adjust the already configured air valve to prevent the unit from blowing water. This improves the reliability of the air conditioner in the data center without increasing the cost. Compared with the solution of adjusting the compressor frequency and fan speed, this invention has fewer variables, stronger controllability, and higher versatility, and is especially suitable for places with high reliability requirements for data center air conditioners. Attached Figure Description

[0021] Figure 1 This is a flowchart of a water blowing control method for a bottom-discharge air conditioner with a damper according to the present invention;

[0022] Figure 2 This is a flowchart illustrating the specific process when the opening angle θ of the air valve in this invention is equal to the set angle θ1 of the first air valve.

[0023] Figure 3 This is a flowchart illustrating the specific process when the opening angle θ of the air valve in this invention is equal to the set angle θ2 of the second air valve. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] like Figure 1 As shown, a method for controlling water blowing in a down-discharge air conditioner with an air valve includes:

[0027] Step S1: After the unit starts working, it performs real-time detection of dry bulb temperature Td, wet bulb temperature Tw, evaporation pressure Pe, and damper opening angle θ, and sets the parameters: first relative humidity setting value RH(set1)%, second relative humidity setting value RH(set2)%, first detection setting time t1, second detection setting time t2, third detection setting time t3, first damper setting angle θ1, second damper setting angle θ2, and dry bulb temperature and evaporation temperature difference setting value ΔT; where the time unit is min, the temperature unit is ℃, and the angle unit is °.

[0028] In the embodiment, when the opening angle θ = 0°, the air valve is fully closed; when the opening angle θ = 90°, the air valve is fully open.

[0029] Step S2: Calculate the detected dry-bulb temperature Td, wet-bulb temperature Tw, and evaporation pressure Pe to obtain the real-time relative humidity RH% and the real-time evaporation temperature Te.

[0030] Step S3: When the data detected within the first detection set time t1 does not meet the condition that the relative humidity RH% > the first relative humidity set value RH(set1)% and the dry bulb temperature Td - evaporation temperature Te > the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the damper angle remains unchanged, and the condition is judged again.

[0031] Step S4: After the conditions in step S3 are met, determine whether the relative humidity RH% > the second relative humidity setting value RH(set2)% is satisfied.

[0032] Step S5: If the condition is met, the air valve is adjusted from 90° to the first air valve setting angle θ1; if the condition is not met, the air valve is adjusted from 90° to the second air valve setting angle θ2.

[0033] like Figure 2 As shown, in step S5, if the opening angle θ of the air valve is equal to the set angle θ1 of the first air valve, then:

[0034] Step S51: When the data detected within the second consecutive detection set time t2 does not meet the condition that the relative humidity RH% ≤ the first relative humidity set value RH(set1)%, or the dry bulb temperature Td - evaporation temperature Te ≤ the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the damper angle remains unchanged, and the condition is judged again.

[0035] In step S52, if the conditions in step S51 are met, the air valve is adjusted to 90 degrees by the first air valve setting angle θ1.

[0036] like Figure 3 As shown, in step S5, if the opening angle θ of the air valve is equal to the set angle θ2 of the second air valve, then:

[0037] Step S53: When the data detected within the third consecutive detection set time t3 does not meet the condition that the relative humidity RH% ≤ the first relative humidity set value RH(set1)%, or the dry bulb temperature Td - evaporation temperature Te ≤ the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the damper angle remains unchanged, and the condition is judged again.

[0038] In step S54, if the conditions in step S53 are met, the air valve is adjusted to 90 degrees by the second air valve setting angle θ2.

[0039] In this embodiment, the first air valve setting angle θ1, the second air valve setting angle θ2, the first relative humidity setting value RH(set1)%, the second relative humidity setting value RH(set2)%, the first detection setting time t1, the second detection setting time t2, and the third detection setting time t3 can all be set according to different unit states.

[0040] In the embodiment, when setting parameters, the following conditions should be met: first relative humidity setting value RH(set1)% < second relative humidity setting value RH(set2)%, third detection setting time t3 < second detection setting time t2, and first air valve setting angle θ1 < second air valve setting angle θ2.

[0041] For ease of understanding, the following examples will be used to illustrate the concept.

[0042] Set the first relative humidity setting value RH(set1)% = 50%, the second relative humidity setting value RH(set2)% = 80%, the first detection setting time t1 = 30min, the second detection setting time t2 = 15min, the third detection setting time t3 = 10min, the dry bulb temperature and evaporation temperature difference setting value ΔT = 15℃, the first air valve setting angle θ1 = 30°, and the second air valve setting angle θ2 = 45°.

[0043] Step S1: After the unit starts working, real-time monitoring is performed on the dry bulb temperature Td, wet bulb temperature Tw, evaporation pressure Pe, and the opening angle of the air valve θ.

[0044] Step S2: Calculate the detected dry-bulb temperature Td, wet-bulb temperature Tw, and evaporation pressure Pe to obtain the real-time relative humidity RH% and the real-time evaporation temperature Te.

[0045] Step S3: When the data detected within the first detection set time t1 = 30 min does not meet the conditions of relative humidity RG% > first relative humidity set value RH(set1)% = 50%, and dry bulb temperature Td - evaporation temperature Te > dry bulb temperature and evaporation temperature difference set value ΔT = 15℃, the damper angle remains unchanged, and the condition is judged again.

[0046] Step S4: After the conditions in step S3 are met, determine whether the relative humidity RG% > the second relative humidity setting value RH(set2)% = 80% is satisfied.

[0047] Step S5: If the condition is met, the air valve is adjusted from 90° to the first air valve setting angle θ1 = 30°; if the condition is not met, the air valve is adjusted from 90° to the second air valve setting angle θ2 = 45°.

[0048] When the relative humidity RG% ≤ the second relative humidity setting value RH(set2)% = 80%, the air valve is adjusted from 90° to the first air valve setting angle θ1 = 30°. When the first relative humidity setting value RH(set1)% = 50% < the relative humidity RG% ≤ the second relative humidity setting value RH(set2)% = 80%, the air valve is adjusted from 90° to the second air valve setting angle θ2 = 45°. Both adjustment methods change the airflow direction from direct downward blowing to oblique downward blowing, reducing the air velocity at the bottom of the evaporator. Even if condensate accumulates at the bottom of the evaporator, the problem of water blowing will be solved due to the reduced air velocity.

[0049] In step S5, if the opening angle θ of the air valve = the set angle θ1 of the first air valve = 30°, then:

[0050] Step S51: When the data detected within the second consecutive detection set time t2 = 15 min does not meet the conditions of relative humidity RH% ≤ first relative humidity set value RH(set1)% = 50%, or dry bulb temperature Td - evaporation temperature Te ≤ dry bulb temperature and evaporation temperature difference set value ΔT = 15℃, the damper angle remains unchanged, and the condition is judged again.

[0051] In step S52, if the conditions in step S51 are met, the air valve is adjusted from the first air valve setting angle θ1 = 30° to 90°.

[0052] In step S5, if the opening angle θ of the air valve = the set angle θ2 of the second air valve = 45°, then:

[0053] Step S53: When the data detected within the third consecutive detection set time t3 = 10 min does not meet the conditions of relative humidity RH% ≤ first relative humidity set value RH(set1)% = 50%, or dry bulb temperature Td - evaporation temperature Te ≤ dry bulb temperature and evaporation temperature difference set value ΔT = 15℃, the damper angle remains unchanged, and the condition is judged again.

[0054] In step S54, if the conditions in step S53 are met, the air valve is adjusted from the second air valve setting angle θ2 = 45° to 90°.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling water blowing in a bottom-discharge air conditioner with an air valve, characterized in that, include: Step S1: After the unit starts working, it performs real-time detection of dry bulb temperature Td, wet bulb temperature Tw, evaporation pressure Pe, and damper opening angle θ, and sets the parameters: first relative humidity setting value RH(set1)%, second relative humidity setting value RH(set2)%, first detection setting time t1, second detection setting time t2, third detection setting time t3, first damper setting angle θ1, second damper setting angle θ2, and dry bulb temperature and evaporation temperature difference setting value ΔT. Step S2: Calculate the detected dry-bulb temperature Td, wet-bulb temperature Tw, and evaporation pressure Pe to obtain the real-time relative humidity RH% and the real-time evaporation temperature Te. Step S3: When the data detected within the first detection set time t1 does not meet the condition that the relative humidity RH% > the first relative humidity set value RH(set1)% and the dry bulb temperature Td - evaporation temperature Te > the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the damper angle remains unchanged, and the condition is judged again. Step S4: After the conditions in step S3 are met, determine whether the relative humidity RH% > the second relative humidity set value RH(set2)% is satisfied; Step S5: If the condition is met, the air valve is adjusted from 90° to the first air valve setting angle θ1; if the condition is not met, the air valve is adjusted from 90° to the second air valve setting angle θ2.

2. The water blowing control method for a bottom-discharge air conditioner with an air valve according to claim 1, characterized in that, In step S1, when the opening angle of the air valve is θ = 0°, the air valve is fully closed; when the opening angle of the air valve is θ = 90°, the air valve is fully open.

3. The water blowing control method for a bottom-discharge air conditioner with an air valve according to claim 1, characterized in that, In step S5, if the opening angle θ of the air valve is equal to the set angle θ1 of the first air valve, then: Step S51: When the data detected within the second consecutive detection set time t2 does not meet the condition that the relative humidity RH% ≤ the first relative humidity set value RH(set1)%, or the dry bulb temperature Td - evaporation temperature Te ≤ the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the damper angle remains unchanged, and the condition is judged again. Step S52: If the conditions in step S51 are met, the air valve is adjusted to 90 degrees by the first air valve setting angle θ1.

4. The water blowing control method for a bottom-discharge air conditioner with an air valve according to claim 3, characterized in that, In step S5, if the opening angle θ of the air valve is equal to the set angle θ2 of the second air valve, then: Step S53: When the data detected within the third consecutive detection set time t3 does not meet the condition that the relative humidity RH% ≤ the first relative humidity set value RH(set1)%, or the dry bulb temperature Td - evaporation temperature Te ≤ the temperature difference set value ΔT between the dry bulb temperature and the evaporation temperature, the air valve angle remains unchanged, and the condition is judged again. In step S54, if the conditions in step S53 are met, the air valve is adjusted to 90 degrees by the second air valve setting angle θ2.

5. A method for controlling water blowing in a bottom-discharge air conditioner with an air valve according to claim 4, characterized in that, The first air valve setting angle θ1, the second air valve setting angle θ2, the first relative humidity setting value RH(set1)%, the second relative humidity setting value RH(set2)%, the first detection setting time t1, the second detection setting time t2, and the third detection setting time t3 can all be set according to different unit conditions.

6. The water blowing control method for a bottom-discharge air conditioner with an air valve according to claim 5, characterized in that, When setting parameters, the following conditions should be met: first relative humidity setting value RH(set1)% < second relative humidity setting value RH(set2)%, third detection setting time t3 < second detection setting time t2, and first air valve setting angle θ1 < second air valve setting angle θ2.

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