Air conditioner base and design method for drain hole of air conditioner base

Abstract

This invention relates to the field of air conditioner technology, specifically providing an air conditioner base and a method for designing a drain hole for the base. The aim is to solve the problem that existing air conditioner bases have drain holes with unreasonable opening areas, leading to untimely drainage or affecting the structural strength of the base. To this end, the air conditioner base of this invention is provided with a drain hole, the opening area S of which satisfies the formula S = V g / (μ*√(2*g*H)), Water production rate V during air conditioner defrosting g Satisfying formula V g =M f / (ρ*T2), the frosting mass M of the heat exchanger during the preset operating time period T1. f Satisfying formula M f =qm*(ah) in -ah out ) / δ*T1. Therefore, during the design phase of the drain hole opening, the maximum frosting mass M of the air conditioner within a preset time, obtained under the test environment, can be determined. f and the water production rate V during defrosting g Calculate the required opening area to meet drainage needs.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, specifically providing an air conditioner base and a method for designing a drain hole for the air conditioner base. Background Technology

[0002] The air conditioner base is a crucial component of the air conditioner structure, serving to secure key parts (compressor, motor bracket, gas-liquid separator, and economizer). However, for dual-purpose (heating and cooling) air conditioners, a thick layer of frost accumulates on the heat exchanger during heating, severely impacting the unit's capacity. Therefore, defrosting is necessary after a period of operation. During this process, a significant amount of frost melts into water and flows to the bottom. To ensure timely drainage, drainage holes need to be drilled in the base. The size of these holes must be appropriate. Currently, drainage holes on air conditioner bases are often drilled based on experience. This can lead to either holes that are too small, resulting in poor drainage, or holes that are too large, creating redundancy and potentially compromising the structural strength of the base. Therefore, finding a solution that allows for sufficient drainage while maintaining the structural strength of the base is a pressing issue for those skilled in the art.

[0003] Accordingly, there is a need in the field for a new air conditioner base and a design method for a drain hole for an air conditioner base to solve the existing problems. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the drainage holes on the existing air conditioner base have unreasonable opening areas, resulting in untimely drainage or affecting the structural strength of the air conditioner base.

[0005] In the first aspect, the air conditioner base has a drain hole, the opening area S of which satisfies the formula S = V g / (μ*√(2*g*H)), where S is the area of ​​the opening, V g denoted as the water production rate during defrosting, μ as the flow coefficient, g as the acceleration due to gravity, and H as the chassis depth.

[0006] In a second aspect, the present invention also provides a method for designing a drain hole for an air conditioner base, the method comprising: obtaining the dry-bulb temperature T of the outdoor unit of the air conditioner placed in a preset environment. d and relative humidity φ1; according to T d The frosting mass M of the heat exchanger during the preset operating time period T1 is obtained using φ1. f According to M f Obtain the water production rate V during defrosting g According to V g Obtain the required opening area S of the drain hole of the air conditioner base.

[0007] In the specific implementation of the above-mentioned drainage hole design method for air conditioner base, "according to T..." d The frosting mass M of the heat exchanger during the preset operating time period T1 is obtained using φ1. f The steps further include: according to T d The theoretical air conditioning capacity Q of the air conditioner is obtained from φ1; according to T d φ1 and Q are used to obtain the actual air conditioning capacity Q of the air conditioner. c And record the first air outlet temperature T of the outdoor fan of the air conditioner at this time. out1 According to the first outlet air temperature T of the external fan out1 Obtain the frosting mass M on the heat exchanger f .

[0008] In the specific implementation of the above-mentioned drainage hole design method for air conditioner base, "according to T..." d The step of obtaining the theoretical air conditioning capacity Q of the air conditioner with φ1 further includes: according to the formula θ=a+b*T d +c*φ1+d*T d *φ1 calculates the attenuation coefficient θ; based on the model of the air conditioner, the nominal air conditioning capacity Q under nominal heating is obtained. r According to the formula Q = Q r *θ calculates the theoretical air conditioning capacity Q of the air conditioner under a preset environment; where a, b, c, and d are coefficients.

[0009] In the specific implementation of the above-mentioned drainage hole design method for air conditioner base, "according to T..." d The actual air conditioning capacity Q of the air conditioner is calculated using φ1 and Q. c And record the first air outlet temperature T of the outdoor fan of the air conditioner at this time. out1 The step further includes: obtaining the outlet air temperature T of the external fan. out According to T out Obtain the outlet enthalpy h of the external fan. out According to T d The enthalpy value h of the air intake of the external fan is obtained by using φ1. in According to formula Q c =qm*(h in -h out Calculate the actual air conditioning capacity Q of the air conditioner. c Where qm is the mass flow rate of the air inside the external fan; calculate Q. c The value of / Q is verified and Q is checked. c Does the value of / Q satisfy C < Q? c / Q<D; when Q cWhen / Q≥D, control the air conditioner to increase the outlet air temperature T of the outdoor fan. out； When Q c When / Q≤C, control the air conditioner to reduce the outlet air temperature T of the outdoor fan. out When C < Q c When / Q < D, record the first outlet air temperature T of the external fan at this time. out1 Where 0 < C < 1, D > 1.

[0010] In a specific embodiment of the above-mentioned drainage hole design method for an air conditioner base, "based on the first outlet air temperature T of the outdoor fan..." out1 Obtain the frosting mass M on the heat exchanger f The steps further include: according to T d And φ1 to obtain the humidity content (ah) at the air inlet of the external fan at this time. in According to the first outlet air temperature T of the external fan out1 The humidity level (ah) at the air outlet of the external fan is obtained by measuring the relative humidity (φ2) of the air at the outlet. out According to formula M f =qm*(ah) in -ah out ) / δ*T1 calculates the frosting mass M on the heat exchanger. f Where δ is the frosting coefficient and T1 is the operating time of the air conditioner.

[0011] In the specific implementation of the above-mentioned drainage hole design method for air conditioner base, "according to M..." f Obtain the water production rate V during defrosting g The steps further include: obtaining the defrosting time T2; and applying the formula V. g =M f The water production rate V during defrosting is calculated using / (ρ*T2). g , where ρ is the density of water.

[0012] In the specific implementation of the above-mentioned drainage hole design method for air conditioner base, "according to V..." g The step of obtaining the required opening area S of the drain hole of the air conditioner base further includes: obtaining the water production rate V during defrosting. g And chassis depth H; according to the formula S = V g The required opening area S of the drainage hole is calculated using the formula / (μ*√(2*g*H)); where μ is the flow coefficient and g is the acceleration due to gravity.

[0013] In a specific embodiment of the above-described method for designing drainage holes for an air conditioner base, the design method further includes: obtaining the required opening area S of the drainage hole; calculating the actual opening area A of the drainage hole according to the formula A = λ * S; where λ is the design margin coefficient.

[0014] In a specific embodiment of the above-described method for designing drainage holes for an air conditioner base, the design method further includes: according to the formula A = Π*n*d 2 / 4 Calculate the opening diameter d and the number of openings n of the drainage hole; where π is pi.

[0015] By adopting the above technical solution, the present invention can accurately calculate the opening area of ​​the drain hole on the air conditioner base. Specifically, during the design stage of the drain hole opening, the maximum frost mass M of the air conditioner within a preset time, obtained under test conditions, can be calculated. f and the water production rate V during defrosting g The required opening area S is calculated so that the drainage hole can meet the drainage needs while ensuring the base plate has a large structural strength. This solves the problem that the drainage hole on the existing air conditioner base is not drained in time or affects the structural strength of the air conditioner base due to the unreasonable opening area. Attached Figure Description

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a flowchart of the main implementation method of the drainage hole design method for an air conditioner base of the present invention;

[0018] Figure 2 This is a flowchart of step S2 of the drainage hole design method for an air conditioner base according to the present invention;

[0019] Figure 3 This is a flowchart of step S21 of the drainage hole design method for an air conditioner base according to the present invention;

[0020] Figure 4 This is a flowchart of step S22 of the drainage hole design method for an air conditioner base according to the present invention;

[0021] Figure 5 This is a flowchart of step S23 of the drainage hole design method for an air conditioner base according to the present invention;

[0022] Figure 6 This is a flowchart of step S3 of the drainage hole design method for an air conditioner base according to the present invention;

[0023] Figure 7This is a flowchart of step S4 of the drainage hole design method for an air conditioner base according to the present invention;

[0024] Figure 8 This is a flowchart of a preferred embodiment of the drainage hole design method for an air conditioner base according to the present invention. Detailed Implementation

[0025] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

[0026] It should be noted that the terms "first" and "second" in this invention are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, all parameters involved in the formulas have been given units in the specification, and parameters without units are unitless parameters.

[0027] First, let's introduce the problems with the drain holes on the existing air conditioner base.

[0028] The air conditioner base is an important component of the air conditioner structure, serving to fix the main components (compressor, motor bracket, gas-liquid separator, and economizer). However, for dual-purpose air conditioners (cooling and heating), as heating progresses, a thick layer of frost accumulates on the heat exchanger, severely affecting the air conditioner's capacity. Therefore, defrosting is necessary after a period of operation. During this time, a large amount of frost melts into water and flows to the bottom. To drain this water promptly, drainage holes need to be drilled in the base. The size of these drainage holes must be appropriate. Existing air conditioner bases often have drainage holes drilled based on experience. This results in either holes that are too small, leading to poor drainage, or holes that are too large, creating redundancy. Severe redundancy can even affect the structural strength of the base. Therefore, finding a way to drill drainage holes in the air conditioner base that meets drainage requirements while minimizing impact on the structural strength of the base is a problem that urgently needs to be solved by those skilled in the art. To address these problems, this invention proposes the following technical solution.

[0029] like Figures 1-7 As shown, to address the problem of untimely drainage or compromised structural strength of existing air conditioner bases due to unreasonable opening areas of the drain holes, this invention proposes an air conditioner base with drain holes. The minimum opening area S of the drain holes satisfies the formula S = V g / (μ*√(2*g*H)), Water production rate V during air conditioner defrosting g Satisfying formula V g =M f / (ρ*T2), the frosting mass M of the heat exchanger during the preset operating time period T1.f Satisfying formula M f =qm*(ah) in -ah out The area of ​​the drain hole can be calculated using the above parameters and formulas, specifically, the drain hole design method for an air conditioner base of the present invention includes: (The formula is: ) / δ*T1.

[0030] S1. Obtain the dry-bulb temperature T of the outdoor unit of the air conditioner under the preset environment. d and relative humidity φ1;

[0031] S2, according to T d The frosting mass M of the heat exchanger during the preset operating time period T1 is obtained using φ1. f ;

[0032] S3, according to M f Obtain the water production rate V during defrosting g ;

[0033] S4, according to V g Obtain the required opening area S of the drain hole of the air conditioner base.

[0034] Of the above steps, step S2 further includes:

[0035] S21, according to T d The theoretical air conditioning capacity Q of the air conditioner is obtained from φ1;

[0036] S22, according to T d φ1 and Q are used to obtain the actual air conditioning capacity Q of the air conditioner. c Record the first air outlet temperature T of the air conditioner's outdoor fan at this time. out1 ;

[0037] S23, based on the first outlet air temperature T of the outdoor fan out1 Obtain the frosting mass M on the heat exchanger f .

[0038] Of the above steps, step S21 further includes:

[0039] S211. According to the formula θ=a+b*T d +c*φ1+d*T d *φ1 is used to calculate the attenuation coefficient θ;

[0040] S212. Obtain the nominal air conditioning capacity Q under nominal heating capacity based on the air conditioner model. r ;

[0041] S213. According to the formula Q = Q r*θ calculates the theoretical air conditioning capacity Q of the air conditioner under a preset environment; where a, b, c, and d are coefficients;

[0042] Step S22 further includes:

[0043] S221. Obtain the outlet air temperature T of the outdoor fan. out ;

[0044] S222, according to T out Obtain the outlet enthalpy h of the external fan out ;

[0045] S223, according to T d The enthalpy h of the air intake of the external fan is obtained from φ1. in ;

[0046] S224, According to formula Q c =qm*(h in -h out Calculate the actual air conditioning capacity Q of the air conditioner. c Where qm is the mass flow rate of the air inside the external fan;

[0047] S225, Calculate Q c The value of / Q is verified and Q is checked. c Does the value of / Q satisfy C < Q? c / Q<D, where C=0.99, D=1.01;

[0048] S2251, when Q c When / Q≥1.01, control the air conditioner to increase the outlet air temperature T of the outdoor fan. out ;

[0049] S2252, When Q c When / Q≤0.99, control the air conditioner to reduce the outlet air temperature T of the outdoor fan. out ;

[0050] S2253, when 0.99 < Q c When / Q < 1.01, record the first outlet air temperature T of the outdoor fan at this time. out1 .

[0051] Step S23 further includes:

[0052] S231, according to T d And φ1 to obtain the humidity content (ah) at the air inlet of the external fan at this time. in ;

[0053] S232, based on the first outlet air temperature T of the outdoor fan out1 The humidity level (ah) at the air outlet is obtained by measuring the relative humidity (φ2) of the air at the outlet. out;

[0054] S233, According to formula M f =qm*(ah) in -ah out ) / δ*T1 calculates the frosting mass M on the heat exchanger. f Where δ is the frosting coefficient and T1 is the operating time of the air conditioner.

[0055] Step S3 further includes:

[0056] S31, Obtain defrosting time T2;

[0057] S32, According to formula V g =M f The water production rate V during defrosting is calculated using / (ρ*T2). g , where ρ is the density of water.

[0058] Step S4 further includes:

[0059] S41. Obtain the water production rate V during defrosting. g and chassis depth H;

[0060] S42. According to the formula S = V g The formula / (μ*√(2*g*H)) calculates the required opening area S of the drainage hole, where μ is the flow coefficient and g is the acceleration due to gravity.

[0061] When designing the drain hole on the base plate of an air conditioner, the usage scenario of the drain hole should be considered first. Generally, the more water vapor in the air (i.e., the higher the humidity of the air), the more frost will form on the heat exchanger in the same amount of time. Therefore, the drainage efficiency of the drain hole is required to discharge the condensate produced during defrosting. To ensure that the drain hole can discharge the condensate produced during defrosting in a timely manner under any humidity level in the daily environment, this invention uses the national standard recommended ambient dry-bulb temperature of 2°C, wet-bulb temperature of 1°C, and relative humidity of 83.9% as experimental conditions. These experimental conditions can cover the maximum humidity environment that most users will encounter when using an air conditioner. Therefore, the opening area of ​​the drain hole calculated according to these experimental conditions ensures that it can meet the drainage needs of most users when using an air conditioner.

[0062] Thus, when using the above-described implementation method, the dry-bulb temperature T of the air from the outdoor unit of the air conditioner placed in the aforementioned preset environment is first obtained. d (unit: °C) and wet-bulb temperature T w (Unit: °C), i.e., T d =2℃, T w=1℃, and based on the dry-bulb and wet-bulb temperatures, the relative humidity φ1 = 83.9% can be obtained from the table. Then, based on the preset environmental information, the frosting mass M of the heat exchanger during the preset operating time period T1 (in seconds) is obtained. f (Unit: kg), specifically, the mass of frost M on the heat exchanger during the preset operating time period T1. f =qm*(ah) in -ah out ) / δ*T1, where δ is the frosting coefficient (generally taken as 1.3-1.6), T1 is the operating time of the air conditioner, qm is the mass flow rate of the indoor air of the outdoor fan (unit: kg / s), and ah in The moisture content (in %) at the outdoor unit's air inlet is expressed in ah. out The humidity content (in %) at the outdoor unit's air outlet is given. In the formula above, qm is related to the airflow at both the inlet and outlet, i.e., it is related to the air conditioner model. This can be obtained based on the air conditioner model. Since the outdoor unit's testing environment is already determined, i.e., the T mentioned above... d The test environment was 2℃, φ1 = 83.9%, therefore the humidity at the outdoor unit's air inlet (ah) was... in According to T d The φ1 value is obtained from a table, while the humidity at the outdoor unit's air outlet (ah) is... out Then it is related to the first outlet air temperature T of the outdoor fan. out1 This is related to the relative humidity φ2 at the air outlet at this time. It's worth noting that during the frosting process, the outlet temperature decreases, thus reducing the moisture saturation of the outlet air (the lower the temperature, the weaker the air's ability to hold water vapor, and the easier it is to reach saturation). This, in turn, causes the relative humidity at the outlet to rise to 96%, based on the first outlet temperature T. out1 With a relative humidity of 96%, the humidity level at the air outlet (Ah) can be obtained by referring to a table. out At this point, it is only necessary to obtain the first outlet air temperature T. out1 The humidity level at the air outlet (Ah) can be obtained from the value. out Then, the frosting mass M is calculated. f Next, we will introduce the first outlet air temperature T. out1The method for obtaining the frost coefficient δ mentioned above. Furthermore, regarding the frost coefficient δ mentioned above, those skilled in the art will understand that if the frost coefficient δ is not added, the frost mass calculated according to the formula is the frost mass under ideal conditions. However, in the actual frost process, due to changes in the humidity in the air, the frost amount does not increase linearly with time, but rather shows a gradually slowing increase. From actual experimental results, the calculated value is often 0.3-0.6 times more than the actual value. Therefore, this embodiment removes the frost coefficient δ from the formula to keep the calculated frost mass consistent with the actual value, thereby making the calculation result of the drain hole opening area more accurate. The aforementioned δ value of 1.3-1.6 is only an illustrative description; this invention does not impose specific restrictions on the value of δ, as long as the purpose of keeping the calculated value consistent with the actual value is met. Additionally, the aforementioned relative humidity at the air outlet rises to 96%, and the 96% value is only an empirical value selected for illustrative purposes during the experimental process. Those skilled in the art can substitute φ2 into the formula for calculation according to actual conditions; this invention does not impose specific restrictions on this.

[0063] As mentioned above, at this point, it is only necessary to obtain the first outlet air temperature T. out1 The humidity level at the air outlet (Ah) can be obtained from the value. out Then, the frosting mass M is calculated. f The outdoor unit's outlet air temperature can be obtained using common temperature detection devices such as temperature sensors. However, it is also necessary to ensure the air conditioning's air conditioning capacity. Therefore, the air conditioning's nominal air conditioning capacity Q needs to be considered. r The theoretical air conditioning capacity Q of the air conditioner under preset conditions and the actual air conditioning capacity Q of the air conditioner. c The concept of the nominal air conditioning capacity Q of an air conditioner. r The nominal air conditioning capacity (Q) of an air conditioner is the air conditioning capacity indicated on its manufacturer's nameplate. This capacity can be obtained from the model number on the nameplate. Air conditioners typically cannot operate at 100% of their nominal air conditioning capacity (or rated capacity) under normal working conditions; there will be a certain degree of reduction. Therefore, the nominal air conditioning capacity (Q) of an air conditioner is defined. r The attenuation coefficient between the air conditioner's theoretical air conditioning capacity Q (in kW) and the air conditioning unit's theoretical air conditioning capacity under preset conditions is θ (in %). d In a test environment of 2℃ and φ1 = 83.9%, according to the formula θ = a + b * T d +c*φ1+d*T d The attenuation coefficient θ can be calculated using *φ1, and then the formula Q=Q can be applied. r *θ can calculate the air conditioner's temperature at T. dThe theoretical air conditioning capacity Q in a test environment of 2℃ and φ1 = 83.9%, where a, b, c, and d are coefficients, with b and d in units of 1 / ℃. a, b, c, and d can be determined based on T. d The theoretical air conditioning capacity Q is obtained by looking up φ1 in a table. After obtaining the theoretical air conditioning capacity Q of the air conditioner, the actual air conditioning capacity Q of the air conditioner needs to be calculated. c (Unit: kW) is verified against the theoretical air conditioning capacity Q, and Q is then adjusted accordingly. c To make it closer to the theoretical value Q, specifically, we first need to obtain the actual air conditioning capacity Q of the air conditioner. c Q c =qm*(h in -h out ), where qm has already been mentioned above and will not be repeated here, h in This is the inlet enthalpy of the external fan (unit: kJ / kg), based on T d φ1 can be obtained by looking up a table, h out This is the outlet enthalpy of the outdoor fan (unit: kJ / kg), based on the outlet air temperature T of the outdoor fan. out Able to look up the table and obtain h out With T out There is a positive correlation, because T d Since φ1 is known, it is only necessary to obtain the outlet air temperature T of the outdoor fan through a temperature sensor. out The outlet enthalpy h of the external fan can be obtained by looking up the table. out Thus, Q is derived. c Calculate Q at this point c The value of / Q is verified and Q is checked. c Does the value of / Q satisfy 0.99 < Q? c / Q<1.01, when Q c When / Q≥1.01, control the air conditioner to increase the outlet air temperature T of the outdoor fan. out This increases h out To reduce Q c When Q c When / Q≤0.99, control the air conditioner to reduce the outlet air temperature T of the outdoor fan. out This reduces h out To increase Q c When 0.99 < Q c When / Q < 1.01, it indicates that the actual air conditioning capacity Q of the air conditioner is... c The temperature is already close to the theoretical value Q, which can meet the user's air conditioning needs. Record the first outlet air temperature T of the outdoor fan at this time. out1 As mentioned above, at this time, based on the first outlet air temperature T out1 With a relative humidity of 96%, the humidity level at the air outlet (Ah) can be obtained by referring to a table. out Therefore, according to formula Mf =qm*(ah) in -ah out The frosting mass M of the heat exchanger during the preset operating time period T1 is calculated using ) / δ*T1. f Additionally, regarding the Q mentioned above... c In the range of values ​​for / Q, let C take the value of 0.99 and D take the value of 1.01. This is just an exemplary description. Those skilled in the art can also take other values ​​for C and D, as long as it makes Q... c The deviation from Q is acceptable as long as it is within the allowable error range. This invention does not impose specific restrictions on the values ​​of C and D.

[0064] The frosting mass M of the heat exchanger was obtained. f After that, the next step is to determine based on M. f Obtain the water production rate V during defrosting g (unit: kg / s), then according to V g The required opening area S (in meters) for the drain hole of the air conditioner base. 2 Specifically, during the defrosting process, the defrosting time T2 (in seconds) is first obtained, and then the defrosting time is calculated according to the formula V. g =M f The water production rate V during defrosting is calculated using / (ρ*T2). g Where ρ is the density of water (unit: kg / m³) 3 Then obtain the chassis depth H (in meters), and use the formula S = V g The formula / (μ*√(2*g*H)) is used to calculate the required opening area S of the drainage hole, where μ is the flow coefficient (generally taken as 0.8-0.85) and g is the acceleration due to gravity (unit: m / s²). 2 The symbol "√" represents the square root, and "√(2*g*H)" means taking the square root of the product of 2*g*H. Thus, since it is based on the water production rate V during defrosting under extreme frosting conditions... g The calculated opening area S of the drain hole is the minimum area to ensure timely drainage (theoretically, a larger drain hole area could be selected, but considering the strength of the chassis, the calculated minimum area is the optimal solution). This ensures that the drain hole can drain the condensate in a timely manner while also ensuring that the base plate has a large structural strength.

[0065] Furthermore, those skilled in the art will understand that the water production rate can be calculated using the above method, or it can be obtained through other parameters or formulas, as long as the final opening area is determined based on the water production rate. These changes do not exceed the technical principles of this invention and are therefore included within the scope of protection of this invention.

[0066] The main embodiments of the present invention have been described above. Next, preferred embodiments of the present invention will be described. Figure 8 This is a flowchart illustrating a preferred embodiment of the drainage hole design method for an air conditioner base according to the present invention.

[0067] As mentioned above, after calculating the required opening area S of the drainage hole, considering that there may be certain processing errors in the actual processing, a design margin for the drainage hole is added in this embodiment. The specific method is as follows:

[0068] S5. Obtain the required opening area S of the drainage hole;

[0069] S6. Calculate the actual opening area A of the drainage hole according to the formula A=λ*S, where λ is the design margin coefficient;

[0070] S7. According to the formula A=Π*n*d 2 / 4 Calculate the opening diameter d and the number of openings n of the drainage hole; where π is the ratio of π to π.

[0071] In the above-described embodiment, after calculating the required opening area S of the drainage hole, this embodiment calculates the actual opening area A (unit: m²) of the drainage hole. 2 The design allowance coefficient λ was added during the machining process to allow for error margins in the drainage holes. This prevents the actual area of ​​the drainage hole from being smaller than the required opening area due to machining errors, thus ensuring proper drainage. Furthermore, after determining the actual opening area A of the drainage hole, the formula A = Π*n*d can be used. 2 / 4 Calculate the opening diameter d and the number of openings n of the drainage hole, where Π = 3.1415. Those skilled in the art can selectively set the number and diameter of the drainage holes according to actual needs, and the present invention does not impose specific limitations on this.

[0072] It should be noted that the above embodiments are merely used to illustrate the principles of the present invention and are not intended to limit the scope of protection of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the above structure so that the present invention can be applied to more specific application scenarios.

[0073] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An air conditioner base, characterized in that, The base is provided with drainage holes, and the opening area S of the drainage holes satisfies the formula S=V g / (μ*√(2*g*H); Where S is the area of ​​the opening, V g V is the water production rate during defrosting. g The frosting mass M of the heat exchanger during a preset operating time period is measured by the frosting mass M. f Get, M f The dry-bulb temperature T of the outdoor unit of the air conditioner under preset conditions. d The relative humidity φ1 is obtained, μ is the flow coefficient, g is the gravitational acceleration, and H is the chassis depth.

2. A method for designing a drain hole for an air conditioner base, characterized in that, The design method includes: Obtain the dry-bulb temperature T of the outdoor unit of the air conditioner under a preset environment. d and relative humidity φ1; According to T d The frosting mass M of the heat exchanger during the preset operating time period T1 is obtained using φ1. f ; According to M f Obtain the water production rate V during defrosting g ; According to the formula S=V g The required opening area S of the drain hole of the air conditioner base is obtained by using / (μ*√(2*g*H)), where μ is the flow coefficient, g is the gravitational acceleration, and H is the chassis depth.

3. The drainage hole design method for an air conditioner base according to claim 2, characterized in that, According to T d The frosting mass M of the heat exchanger during the preset operating time period T1 is obtained using φ1. f The steps further include: According to T d The theoretical air conditioning capacity Q of the air conditioner is obtained from φ1; According to T d φ1 and Q are used to obtain the actual air conditioning capacity Q of the air conditioner. c And record the first air outlet temperature T of the outdoor fan of the air conditioner at this time. out1 ; According to the first outlet air temperature T of the external fan out1 Obtain the frosting mass M on the heat exchanger f .

4. The drainage hole design method for an air conditioner base according to claim 3, characterized in that, According to T d The step of obtaining the theoretical air conditioning capacity Q of the air conditioner with φ1 further includes: According to the formula θ=a+b*T d +c*φ1+d*T d *φ1 is used to calculate the attenuation coefficient θ; The nominal air conditioning capacity Q under nominal heating is obtained according to the model of the air conditioner. r ; According to the formula Q=Q r *θ calculates the theoretical air conditioning capacity Q of the air conditioner under a preset environment; Where a, b, c, and d are coefficients.

5. The drainage hole design method for an air conditioner base according to claim 4, characterized in that, According to T d φ1 and Q are used to obtain the actual air conditioning capacity Q of the air conditioner. c And record the first air outlet temperature T of the outdoor fan of the air conditioner at this time. out1 The steps further include: Obtain the outlet air temperature T of the external fan. out ; According to T out Obtain the outlet enthalpy h of the external fan. out ; According to T d The enthalpy value h of the air intake of the external fan is obtained by using φ1. in ; According to formula Q c =qm*(h in -h out Calculate the actual air conditioning capacity Q of the air conditioner. c ; Where qm is the mass flow rate of the air inside the external fan; Calculate Q c The value of / Q is verified and Q is checked. c Does the value of / Q satisfy C < Q? c / Q<D; When Q c When / Q≥D, control the air conditioner to increase the outlet air temperature T of the outdoor fan. out ; When Q c When / Q≤C, control the air conditioner to reduce the outlet air temperature T of the outdoor fan. out ; When C < Q c When / Q < D, record the first outlet air temperature T of the external fan at this time. out1 ; Where 0 < C < 1, D > 1.

6. The method for designing drainage holes for an air conditioner base according to claim 5, characterized in that, "Based on the first outlet air temperature T of the external fan" out1 Obtain the frosting mass M on the heat exchanger f The steps further include: According to T d And φ1 to obtain the humidity content (ah) at the air inlet of the external fan at this time. in ; According to the first outlet air temperature T of the external fan out1 The humidity level (ah) at the air outlet of the external fan is obtained by measuring the relative humidity (φ2) of the air at the outlet. out ; According to formula M f =qm*(ah) in -ah out ) / δ*T1 calculates the frosting mass M on the heat exchanger. f ; Where δ is the frosting coefficient and T1 is the operating time of the air conditioner.

7. The method for designing drainage holes for an air conditioner base according to claim 6, characterized in that, According to M f Obtain the water production rate V during defrosting g The steps further include: Obtain the defrosting time T2; According to formula V g =M f The water production rate V during defrosting is calculated using / (ρ*T2). g , where ρ is the density of water.

8. The method for designing drainage holes for an air conditioner base according to claim 2, characterized in that, The design method further includes: Obtain the required opening area S of the drainage hole; The actual opening area A of the drainage hole is calculated according to the formula A=λ*S; Where λ is the design margin coefficient.

9. The method for designing a drain hole for an air conditioner base according to claim 8, characterized in that, The design method further includes: According to the formula A=Π*n*d 2 / 4 Calculate the opening diameter d and the number of openings n of the drainage hole; Where Π represents pi.

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