Air conditioner base and drainage hole design method for air conditioner base

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioner base and a drainage hole design method for the air conditioner base, and aims to solve the problem that drainage is not timely or the structural strength of the air conditioner base is affected due to the fact that the opening area of a drainage hole in an existing air conditioner base is unreasonable. In order to achieve the purpose, a drainage hole is formed in a base of the air conditioner, the opening area S of the drainage hole meets the formula S = Vg / (mu * square root of (2 * g * H)), the water production rate Vg during defrosting of the air conditioner meets the formula Vg = Mf / (rho * T2), and the frosting quality Mf of a heat exchanger within the preset T1 operation time period meets the formula Mf = qm * (ahin-ahout) / delta * T1. Therefore, in the opening design stage of the drainage hole, the required opening area can be calculated according to the maximum frosting mass Mf of the air conditioner within the preset time and the water production rate Vg during defrosting obtained in the test environment, and the drainage requirement can be met.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioners, and specifically provides an air conditioner base and a drainage hole design method for the air conditioner base. Background Art

[0002] The air conditioner base is an important part of the air conditioner structure, and plays the role of fixing the main components (compressor, motor bracket, gas-liquid separator, economizer). However, for dual-purpose air conditioners, as the heating is carried out, a thick layer of frost will form on the heat exchanger, which seriously affects the capacity of the air conditioner. Therefore, the air conditioner needs to be defrosted after running for a period of time. At this time, a large amount of frost will turn into water and flow to the bottom. In order to drain the water in time, it is necessary to punch drainage holes on the chassis. The size of the drainage holes should be appropriate. The drainage holes on the existing air conditioner bottom plate are often punched based on experience. In this way, either the drainage hole is too small to cause poor drainage, or the drainage area of ​​the drainage hole is too large to form redundancy. When the redundancy is serious, it will also affect the structural strength of the bottom plate. Therefore, how to ensure that the bottom plate has a greater structural strength as much as possible while meeting the drainage requirements when opening drainage holes on the air conditioner base is a problem that needs to be solved urgently by technicians in this field.

[0003] Accordingly, the art needs a new air conditioner base and a drainage hole design method for the air conditioner base to solve the existing problems. Summary of the invention

[0004] The present invention aims to solve the above technical problem, that is, to solve the problem that the drainage holes on the existing air conditioner base are not reasonably opened, resulting in untimely drainage or affecting the structural strength of the air conditioner base. In a first aspect, an air conditioner base is provided with a drainage hole, and the opening area S of the drainage hole satisfies the formula S=V g / (μ*√(2*g*H)), where S is the opening area, V g is the water production rate during defrosting, μ is the flow coefficient, g is the acceleration of gravity, and H is the depth of the chassis. In a second aspect, the present invention also provides a method for designing a drainage hole for an air conditioner base, the method comprising: obtaining the air dry bulb temperature T of the air conditioner outdoor unit placed in a preset environment d and relative humidity φ1; according to T d and φ1 to obtain the frost mass M of the heat exchanger during the preset T1 operating time period f According to M f Get the water production rate V during defrosting g According to V g Obtain the required opening area S of the drainage hole of the air conditioner base.

[0005] In the specific implementation of the drainage hole design method for the air conditioner base, "according to T d and φ1 to obtain the frost mass M of the heat exchanger during the preset T1 operating time period f The step further comprises: according to T d and φ1 to obtain the theoretical air conditioning capacity Q of the air conditioner; according to T d , φ1 and Q to obtain the actual air conditioning capacity Q of the air conditioner c And record the first air outlet temperature T of the air conditioner external fan at this time out1 ; According to the first outlet air temperature T of the external fan out1 Get the frost mass M on the heat exchanger f .

[0006] In the specific implementation of the drainage hole design method for the air conditioner base, "according to T d The step of obtaining the theoretical air conditioning capacity Q of the air conditioner by φ1 further comprises: according to the formula θ=a+b*T d +c*φ1+d*T d *φ1 calculates the attenuation coefficient θ; obtains the nominal air conditioning capacity Q under nominal heating 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; wherein a, b, c, and d are coefficients.

[0007] In the specific implementation of the drainage hole design method for the air conditioner base, "according to T d , φ1 and Q to calculate the actual air conditioning capacity Q of the air conditioner c And record the first air outlet temperature T of the air conditioner external fan at this time out1 The step further includes: obtaining the outlet air temperature T of the external fan out According to T out Get the outlet enthalpy value h of the external fan out According to T d and φ1 to obtain the inlet enthalpy value h of the external fan in According to the 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 wind inside the external fan; calculate Q c / Q value and verify Q c / Whether the value of Q satisfies C<Q c / Q<D; when Q c / Q≥D, the air conditioner is controlled to increase the air outlet temperature T of the external fanout； When Q c / Q≤C, control the air conditioner to reduce the air outlet temperature T of the external fan out ; When C<Q c / Q<D, record the first outlet air temperature T of the external fan at this time out1 ; where 0<C<1, D>1.

[0008] In the specific implementation of the drainage hole design method for the air conditioner base, "according to the first air outlet temperature T of the external fan out1 Get the frost mass M on the heat exchanger f The step further comprises: according to T d and φ1 to obtain the humidity ah at the inlet of the external fan at this time in ; According to the first outlet air temperature T of the external fan out1 The relative humidity of the air at the outlet at this time φ2 is used to obtain the humidity ah at the outlet of the external fan at this time out According to formula M f =qm*(ah in -ah out ) / δ*T1 Calculate the frost mass M on the heat exchanger f ; Wherein, δ is the frosting coefficient and T1 is the operating time of the air conditioner.

[0009] In the specific implementation of the drainage hole design method for the air conditioner base, "according to M f Get the water production rate V during defrosting g The step further includes: obtaining the defrosting time T2; according to the formula V g =M f / (ρ*T2) calculates the water production rate V during defrosting g , where ρ is the density of water.

[0010] In the specific implementation of the drainage hole design method for the air conditioner base, "according to V g The step of obtaining the required opening area S" of the drainage 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 / (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 of gravity.

[0011] In the specific implementation of the drainage hole design method for the air conditioner base, the design method also 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; wherein λ is the design margin coefficient.

[0012] In the specific implementation of the drainage hole design method for the air conditioner base, the design method further includes: according to the formula A = Π*n*d 2 / 4Calculate the opening diameter d and the number of openings n of the drainage hole; where Π is pi.

[0013] In the case of adopting the above technical solution, the present invention can accurately calculate the opening area of ​​the drainage hole on the base of the air conditioner. Specifically, in the opening design stage of the drainage hole, the maximum frost mass M of the air conditioner within a preset time obtained under the test environment can be calculated. f And the water production rate V during defrosting g The required opening area S is calculated so that the drainage holes can meet the drainage requirements while ensuring that the base plate has a greater structural strength as much as possible, solving the problem that the drainage holes on the existing air conditioner base have unreasonable opening area, resulting in untimely drainage or affecting the structural strength of the air conditioner base. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0015] Figure 1 It is a flow chart of the main implementation method of the drainage hole design method for the air conditioner base of the present invention;

[0016] Figure 2 is a flow chart of step S2 of the method for designing a drainage hole for an air conditioner base of the present invention;

[0017] Figure 3 is a flow chart of step S21 of the method for designing a drainage hole for an air conditioner base of the present invention;

[0018] Figure 4 is a flow chart of step S22 of the method for designing a drainage hole for an air conditioner base of the present invention;

[0019] Figure 5 is a flow chart of step S23 of the method for designing a drainage hole for an air conditioner base of the present invention;

[0020] Figure 6 is a flow chart of step S3 of the method for designing a drainage hole for an air conditioner base of the present invention;

[0021] Figure 7 is a flow chart of step S4 of the method for designing a drainage hole for an air conditioner base of the present invention;

[0022] Figure 8 It is a flow chart of a preferred embodiment of the method for designing a drainage hole for an air conditioner base of the present invention. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0024] It should be noted that, in the present invention, the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In addition, the parameters involved in the formulas have been marked with units in the specification, and parameters without units are unitless parameters.

[0025] First, the problems existing in the drainage holes on the base of the existing air conditioner are introduced.

[0026] The air conditioner base is an important part of the air conditioner structure, and plays the role of fixing the main components (compressor, motor bracket, gas-liquid separator, economizer). However, for dual-purpose air conditioners, as the heating is carried out, a thick layer of frost will form on the heat exchanger, which seriously affects the capacity of the air conditioner. Therefore, the air conditioner needs to be defrosted after running for a period of time. At this time, a large amount of frost will turn into water and flow to the bottom. In order to drain the water in time, it is necessary to punch drainage holes on the chassis. The size of the drainage holes should be appropriate. The drainage holes on the existing air conditioner bottom plate are often punched based on experience. In this way, either the drainage holes are too small to cause poor drainage, or the drainage area of ​​the drainage holes is too large to form redundancy. When the redundancy is serious, it will also affect the structural strength of the bottom plate. Therefore, when opening drainage holes on the air conditioner base, it is a problem that technicians in this field need to solve as much as possible without affecting the structural strength of the bottom plate on the basis of meeting the drainage requirements. In view of the above problems, the present invention proposes the following technical solutions.

[0027] like Figure 1-Figure 7 As shown, in order to solve the problem that the drainage holes on the existing air conditioner base are not drained in time or the structural strength of the air conditioner base is affected due to unreasonable opening area, the present invention proposes an air conditioner base, which is provided with drainage holes, and the minimum opening area S of the drainage holes satisfies the formula S=V g / (μ*√(2*g*H)), water production rate V when the air conditioner is defrosted g Satisfy formula V g =M f / (ρ*T2), the frost mass M of the heat exchanger during the preset T1 operating time period f Satisfy formula M f =qm*(ah in -ah out ) / δ*T1, so that the opening area of ​​the drain hole can be calculated according to the above parameters and formula. Specifically, the drain hole design method for the air conditioner base of the present invention includes:

[0028] S1. Obtain the air dry bulb temperature T of the outdoor unit of the air conditioner placed in the preset environment d and relative humidity φ1;

[0029] S2. According to T d and φ1 to obtain the frost mass M of the heat exchanger during the preset T1 operating time period f ;

[0030] S3, according to M f Get the water production rate V during defrosting g ;

[0031] S4. According to V g Obtain the required opening area S of the drainage hole of the air conditioner base.

[0032] In the above steps, step S2 further comprises:

[0033] S21. According to T d and φ1 to obtain the theoretical air conditioning capacity Q of the air conditioner;

[0034] S22. According to T d , φ1 and Q to obtain the actual air conditioning capacity Q of the air conditioner c And record the first air outlet temperature T of the air conditioner's external fan at this time out1 ;

[0035] S23, according to the first air outlet temperature T of the external fan out1 Get the frost mass M on the heat exchanger f .

[0036] In the above steps, step S21 further includes:

[0037] S211, according to the formula θ=a+b*T d +c*φ1+d*T d *φ1 calculates the attenuation coefficient θ;

[0038] S212. Obtain the nominal air conditioning capacity Q under nominal heating according to the model of the air conditioner. r ;

[0039] S213, according to the formula Q = Q r *θ calculates the theoretical air conditioning capacity Q of the air conditioner under the preset environment; where a, b, c, d are coefficients;

[0040] Step S22 further includes:

[0041] S221. Obtain the outlet air temperature T of the external fan out ;

[0042] S222, according to T out Get the outlet enthalpy value h of the external fan out ;

[0043] S223, according to T d and φ1 to obtain the inlet enthalpy value h of the external fan in ;

[0044] 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 wind inside the external fan;

[0045] S225, Calculate Q c / Q value and verify Q c / Whether the value of Q satisfies C<Q c / Q<D, where C=0.99, D=1.01;

[0046] S2251, when Q c / Q≥1.01, control the air conditioner to increase the outdoor fan outlet temperature T out ;

[0047] S2252, when Q c / Q≤0.99, control the air conditioner to lower the outdoor fan outlet temperature T out ;

[0048] S2253, when 0.99<Q c When / Q<1.01, record the first air outlet temperature T of the external fan at this time out1 .

[0049] Step S23 further comprises:

[0050] S231, according to T d and φ1 to obtain the humidity ah at the inlet of the external fan at this time in ;

[0051] S232, according to the first air outlet temperature T of the external fan out1 And the relative humidity of the air at the outlet at this time φ2 to obtain the humidity ah at the outlet of the external fan at this time out ;

[0052] S233, according to formula M f =qm*(ah in -ah out ) / δ*T1 Calculate the frost mass M on the heat exchanger f , where δ is the frosting coefficient and T1 is the operating time of the air conditioner.

[0053] Step S3 further comprises:

[0054] S31, obtaining the defrosting time T2;

[0055] S32, according to formula V g =M f / (ρ*T2) calculates the water production rate V during defrosting g , where ρ is the density of water.

[0056] Step S4 further comprises:

[0057] S41. Obtain the water production rate V during defrosting g and chassis depth H;

[0058] S42, according to the formula S = V g / (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 of gravity.

[0059] When designing the drainage holes on the bottom plate of the air conditioner, the use scenarios of the drainage holes should be considered first. Under normal circumstances, the more water vapor in the air (that is, the higher the humidity content of the air), the more frost will be formed on the heat exchanger in the same period of time. Therefore, the drainage efficiency requirements for the drainage holes when discharging the condensed water generated during defrosting will be higher. Therefore, in order to ensure that the drainage holes can discharge the condensed water generated by defrosting in time under any humidity conditions in the daily environment during the daily use of the air conditioner by users, the present invention uses the ambient dry-bulb temperature of 2°C, the wet-bulb temperature of 1°C, and the relative humidity of 83.9% recommended by the national standard as experimental conditions for testing. This experimental condition can cover the maximum humidity environment that most users can encounter when using the air conditioner. Therefore, the opening area of ​​the drainage hole calculated according to this experimental condition ensures that the drainage needs of most users for condensed water when using the air conditioner can be met.

[0060] Thus, in the case of adopting the above embodiment, firstly, the air dry bulb temperature T of the outdoor unit of the air conditioner placed in the above preset environment is obtained. d (unit ℃) and wet bulb temperature T w (Unit: °C), i.e. T d =2℃、T w =1℃, and the relative humidity of the air can be obtained by looking up the table based on the dry bulb temperature and wet bulb temperature φ1=83.9%. Then, the frost mass M of the heat exchanger in the preset T1 (unit s) operating time period is obtained based on the preset environmental information. f (Unit: kg), specifically, the frost mass M of the heat exchanger during the preset T1 operating time period f =qm*(ah in -ahout ) / δ*T1, where δ is the frosting coefficient (usually 1.3-1.6), T1 is the running time of the air conditioner, qm is the mass flow rate of the internal wind of the outdoor fan (in kg / s), ah in is the humidity content at the outdoor unit inlet (unit %), ah out is the humidity content of the outdoor unit outlet (unit %). In the above formula, qm is related to the flow rate of the air inlet and outlet, that is, it is related to the model of the air conditioner and can be obtained according to the model of the air conditioner. Since the test environment of the outdoor unit has been determined, that is, the T mentioned above d =2℃, φ1=83.9% test environment, so the humidity at the outdoor unit inlet is ah in According to T d and φ1 are obtained by looking up the table, and the humidity at the outdoor unit outlet is ah out The first outlet air temperature T out1 It is related to the relative humidity φ2 of the air at the air outlet at this time. It is worth mentioning that the air outlet temperature will decrease during the frosting process, thereby reducing the moisture saturation of the air outlet (the lower the temperature, the weaker the ability of the air to hold water vapor, and the easier it is to reach saturation), thereby increasing the relative humidity of the air outlet to 96%. According to the first air outlet temperature T out1 and 96% relative humidity. The humidity at the air outlet can be obtained by looking up the table. out At this time, you only need to obtain the first outlet air temperature T out1 The value of the air outlet humidity ah can be obtained out , and then calculate the frosting mass M f Next, we will introduce the first air outlet temperature T out1 In addition, regarding the frosting coefficient δ mentioned above, it can be understood by those skilled in the art that if the frosting coefficient δ is not added, the frosting mass calculated according to the formula is the frosting mass under ideal conditions. However, in the actual frosting process, due to the change in the moisture content in the air, the frosting amount does not increase linearly with time, but shows a gradually slow growth. From the actual experimental results, the calculated value is often 0.3-0.6 times more than the actual value. Therefore, the present embodiment removes the frosting coefficient δ from the formula to keep the calculated value of the frosting mass consistent with the actual value, so that the calculation result of the drainage hole opening area is more accurate. The above-mentioned δ of 1.3-1.6 is only an exemplary description. The present invention does not make specific restrictions on the value of δ, as long as it meets the purpose of achieving consistency between the calculated value and the actual value. In addition, the relative humidity of the air outlet mentioned above is increased to 96%, and the value of 96% is also an empirical value selected for the convenience of explanation in the experimental process. Those skilled in the art can bring φ2 into the formula for calculation according to actual conditions, and the present invention does not make specific restrictions on this.

[0061] As mentioned above, at this time, only the first outlet air temperature T out1 The value of the air outlet humidity ah can be obtained out , and then calculate the frosting mass M f The air outlet temperature of the outdoor unit can be obtained through common temperature detection devices such as temperature sensors, but at the same time, the air conditioning capacity of the air conditioner needs to be guaranteed. Therefore, the nominal air conditioning capacity Q of the air conditioner needs to be introduced. r , the theoretical air conditioning capacity Q of the air conditioner under the preset environment and the actual air conditioning capacity Q of the air conditioner c The concept of air conditioning is the nominal air conditioning capacity Q r That is, the air conditioning capacity of the air conditioner marked on the factory nameplate of the air conditioner can be obtained according to the model on the nameplate of the air conditioner (unit: kW). The air conditioner usually cannot 100% exert the nominal air conditioning capacity (or rated capacity) in the working environment, and there will be a certain degree of attenuation. Therefore, the nominal air conditioning capacity Q of the air conditioner is defined. r The attenuation coefficient between the theoretical air conditioning capacity Q (in kW) of the air conditioner under the preset environment is θ (in %). d =2℃, φ1=83.9% test environment, according to the formula θ=a+b*T d +c*φ1+d*T d *φ1 can calculate the attenuation coefficient θ, and then according to the formula Q=Q r *θ can calculate the air conditioner at T d =2℃, φ1=83.9% of the test environment in the theoretical air conditioning capacity Q, where a, b, c, d are coefficients, the unit of b, d is 1 / ℃, a, b, c, d can be calculated based on T d After obtaining the theoretical air conditioning capacity Q of the air conditioner, it is necessary to convert the actual air conditioning capacity Q of the air conditioner into c (Unit: kW) is verified with the theoretical air conditioning capacity Q, thereby adjusting Q 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 been mentioned above and will not be repeated here, h in is the inlet enthalpy of the external fan (in kJ / kg), according to T d and φ1 can be obtained by looking up the table, h out is the outlet enthalpy of the external fan (in kJ / kg), according to the outlet temperature T out Can look up the table to obtain and h out With Tout is positively correlated, due to T d and φ1 are known, so we only need to obtain the outlet air temperature T of the outdoor fan through the temperature sensor. out You can look up the table to get the outlet enthalpy value h of the external fan out , and then we get Q c , then calculate Q c / Q value and verify Q c / Whether the value of Q satisfies 0.99<Q c / Q<1.01, when Q c / Q≥1.01, control the air conditioner to increase the outdoor fan outlet temperature T out , thereby increasing h out To reduce Q c , when Q c / Q≤0.99, control the air conditioner to lower the outdoor fan outlet temperature T out , thereby reducing h out To increase Q c , when 0.99<Q c / Q<1.01, indicating the actual air conditioning capacity of the air conditioner at this time Q c It is close to the theoretical value Q and can meet the user's air conditioning needs. The first air outlet temperature T of the external fan is recorded at this time. out1 As mentioned above, at this time, according to the first outlet air temperature T out1 and 96% relative humidity. The humidity at the air outlet can be obtained by looking up the table. out , and then according to formula M f =qm*(ah in -ah out ) / δ*T1 to calculate the frost mass M of the heat exchanger during the preset T1 operating time period f In addition, regarding the above-mentioned Q c In the range of values ​​of / Q, let C take the value of 0.99 and let D take the value of 1.01. This is just an exemplary statement. Those skilled in the art can also take other values ​​of C and D as long as Q c The deviation from Q only needs to be within the allowable error range, and the present invention does not impose any specific restrictions on the values ​​of C and D.

[0062] After obtaining the frost mass M of the heat exchanger f After that, we need to f Get the water production rate V during defrosting g (Unit: kg / s), then according to V g Get the required opening area S (in m) of the drainage hole of the air conditioner base 2 ), specifically, during the defrosting process, first obtain the defrosting time T2 (in seconds), and then use the formula V g =Mf / (ρ*T2) calculates the water production rate V during defrosting g , where ρ is the density of water (in kg / m 3 ), then obtain the depth H (in m) of the chassis, according to the formula S = V g / (μ*√(2*g*H)) calculates the required opening area S of the drainage hole, where μ is the flow coefficient (usually 0.8-0.85), g is the acceleration of gravity (unit: m / s 2 ), the symbol "√" is the square root, and the meaning of "√(2*g*H)" is the square root of the product of 2*g*H. In this way, since it is based on the water production rate V during defrosting under extreme frosting conditions g The opening area S of the drainage hole is calculated, so the opening area S of the drainage hole is the minimum area to ensure timely drainage (that is, theoretically, a larger drainage hole area can be set on this basis, but for chassis strength considerations, the calculated minimum area is the optimal solution), thereby ensuring that the drainage hole can discharge condensed water in time while also ensuring that the base plate has a greater structural strength.

[0063] In addition, those skilled in the art will appreciate that the water production rate may be calculated using the above method or may be obtained using other parameters or formulas, as long as the calculation of the final opening area is determined based on the water production rate. These changes do not exceed the technical principles of the present invention and are therefore included in the scope of protection of the present invention.

[0064] The main embodiments of the present invention have been introduced above, and the preferred embodiments of the present invention will be introduced next. Figure 8 The present invention is a flow chart of a preferred embodiment of the method for designing a drainage hole for an air conditioner base.

[0065] As mentioned above, after calculating the opening area S required for the drainage hole, considering that there may be certain processing errors in the actual processing process, the design margin of the drainage hole is also increased in this embodiment, and the specific method is as follows:

[0066] S5, obtaining the required opening area S of the drainage hole;

[0067] 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;

[0068] S7, according to the formula A = Π * n * d 2 / 4Calculate the opening diameter d and number n of drainage holes; where Π is pi.

[0069] In the case of adopting the above embodiment, after calculating the required opening area S of the drainage hole, the present embodiment calculates the actual opening area A (unit: m) of the drainage hole. 2 ) is added to the design margin coefficient λ, thereby reserving an error margin for the processing of the drainage hole to avoid the situation where the actual area of ​​the drainage hole is smaller than the required opening area due to processing errors, making the drainage hole unable to drain water as required. In addition, after determining the actual opening area A of the drainage hole, the formula A=Π*n*d 2 / 4 calculates the opening diameter d and the number n of the drainage holes, 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 any specific limitation on this.

[0070] It should be noted that the above-mentioned implementation mode is only used to illustrate the principle of the present invention and is not intended to limit the scope of protection of the present invention. Without departing from the principle of the present invention, those skilled in the art can adjust the above-mentioned structure so that the present invention can be applied to more specific application scenarios.

[0071] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle 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 these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An air conditioner base, characterized in that: The base is provided with a drainage hole, and the opening area S of the drainage hole satisfies the formula S=V g / (μ*√(2*g*H)); Where S is the opening area, V g is the water production rate during defrosting, μ is the flow coefficient, g is the acceleration of gravity, and H is the depth of the chassis.

2. A method for designing a drainage hole for an air conditioner base, characterized in that: The design method comprises: Obtain the air dry bulb temperature T of the air conditioner outdoor unit placed in the preset environment d and relative humidity φ1; According to T d and φ1 to obtain the frost mass M of the heat exchanger during the preset T1 operating time period f ; According to M f Get the water production rate V during defrosting g ; According to V g Obtain the required opening area S of the drainage hole of the air conditioner base.

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

4. The method for designing a drainage hole 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 by φ1 further comprises: According to the formula θ=a+b*T d +c*φ1+d*T d *φ1 calculates the attenuation coefficient θ; Obtain the nominal air conditioning capacity Q under nominal heating according to the model of the air conditioner r ; According to the formula Q = Q r *θ Calculate the theoretical air conditioning capacity Q of the air conditioner under the preset environment; Among them, a, b, c, and d are coefficients.

5. The method for designing a drainage hole for an air conditioner base according to claim 4, characterized in that: "According to T d , φ1 and Q to obtain the actual air conditioning capacity Q of the air conditioner c And record the first air outlet temperature T of the air conditioner external fan at this time out1 The steps further include: Get the air outlet temperature T of the external fan out ; According to T out Get the outlet enthalpy value h of the external fan out ; According to T d and φ1 to obtain the inlet enthalpy value h of the external fan in ; According to the formula Q c =qm*(h in -h out ) Calculate the actual air conditioning capacity Q of the air conditioner c ; Among them, qm is the mass flow rate of the wind inside the external fan; Calculate Q c / Q value and verify Q c / Whether the value of Q satisfies C<Q c / Q<D; When Q c / Q≥D, the air conditioner is controlled to increase the air outlet temperature T of the external fan out ; When Q c / Q≤C, control the air conditioner to reduce the air outlet temperature T of the external fan out ; When C < Q c / Q<D, record the first outlet air temperature T of the external fan at this time out1 ; Among them, 0<C<1, D>1.

6. The method for designing a drainage hole for an air conditioner base according to claim 5, characterized in that: "According to the first outlet air temperature T of the external fan out1 Get the frost mass M on the heat exchanger f The steps further include: According to T d and φ1 to obtain the humidity ah at the external fan inlet at this time in ; According to the first air outlet temperature T of the external fan out1 The relative humidity of the air at the outlet at this time φ2 is used to obtain the humidity ah at the outlet of the external fan at this time out ; According to the formula M f =qm*(ah in -ah out ) / δ*T1 Calculate the frost mass M on the heat exchanger f ; Wherein, δ is the frosting coefficient, and T1 is the operating time of the air conditioner.

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

8. The method for designing a drainage hole for an air conditioner base according to claim 7, characterized in that: "According to V g The step of obtaining the required opening area S" of the drainage hole of the air conditioner base further includes: Get the water production rate V during defrosting g and chassis depth H; According to the formula S = V g / (μ*√(2*g*H)) calculates the required opening area S of the drainage hole; Among them, μ is the flow coefficient and g is the acceleration due to gravity.

9. The method for designing a drainage hole for an air conditioner base according to claim 8, characterized in that: The design method further comprises: Obtaining the required opening area S of the drainage hole; Calculate the actual opening area A of the drainage hole according to the formula A=λ*S; Where λ is the design margin coefficient.

10. The method for designing a drainage hole for an air conditioner base according to claim 9, characterized in that: The design method further comprises: According to the formula A=Π*n*d 2 / 4 Calculate the opening diameter d and the number n of the drainage holes; Where π is the ratio of a circle to its circumference.

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