Anti-condensation control logic for a vehicle refrigerator

Abstract

The application discloses a kind of anti-condensation control logic of vehicle refrigerator, wherein vehicle refrigerator includes refrigerator shell, refrigeration liner, evaporator, foaming layer, compressor, condenser, the outer surface of refrigerator shell is also provided temperature sensor and humidity sensor, according to environmental temperature K and environmental humidity B and combining water vapor dew point temperature calculation formula, the dew point temperature T is calculated, temperature T means when the temperature of the surface of refrigerator shell is lower than T, condensation phenomenon will be generated, and the lowest heat insulation temperature degree of foaming layer A refers to in stable time range, the stable temperature difference A formed between refrigeration liner and the outer surface of refrigerator shell can be formed by foaming layer, the lowest temperature C under this temperature is set by this way, as long as the lowest temperature in refrigeration liner is not lower than C degree, the surface temperature of refrigerator shell will not be lower than T degree, thereby avoiding the generation of condensation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle refrigerator, in particular to a condensation control logic of vehicle refrigerator. BACKGROUND

[0002] Vehicle refrigerator is one of the optional accessories of the car. Due to the limited size of the vehicle refrigerator, in order to ensure the use space in the refrigeration liner, the thickness of the foaming layer is relatively thin, which leads to a serious problem of the vehicle refrigerator, i.e. condensation problem. When the temperature in the refrigeration liner of the vehicle refrigerator is low, due to the low thickness of the foaming layer, the temperature of the outer surface of the vehicle refrigerator shell is also low, and when the humidity and temperature in the air are high, it is very easy to form condensation water on the surface of the vehicle refrigerator shell. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the present application is to provide a condensation control logic of vehicle refrigerator.

[0004] The technical scheme adopted by the present application to solve the problem is as follows: a condensation control logic of vehicle refrigerator, the vehicle refrigerator comprises a refrigerator shell, a refrigeration liner arranged in the refrigerator shell, an evaporator located on the refrigeration liner, a foaming layer located on the outside of the refrigeration liner and the inside of the refrigerator shell, a compressor connected with the evaporator, and a condenser connected with the compressor and the evaporator, a temperature sensor and a humidity sensor are arranged on the outer surface of the refrigerator shell, and the lowest heat insulation temperature of the foaming layer is A.

[0005] The condensation control logic is as follows:

[0006] It is judged whether the refrigerator is in a refrigeration state, if it is in a refrigeration state, the ambient temperature is K and the ambient humidity is B detected by the temperature sensor and the humidity sensor, the dew point temperature T is calculated according to the ambient temperature K and the ambient humidity B combined with the water vapor dew point temperature calculation formula, the lowest temperature in the refrigeration liner is C, and the refrigeration refrigerator is refrigerated at a temperature not lower than the temperature C, wherein the algorithm logic of C and T is one of the following two:

[0007] I. C=T-A;

[0008] II. The dew point temperature range is divided into n gradients from low to high: (T0,T1], (T1,T2]……(T(n-1),Tn], wherein Tn>T(n-1), when the calculated dew point temperature T falls into the range of (Ta-1,Ta], C=Ta-A.

[0009] As a further improvement of the above technical scheme, a heating element is arranged between the surface of the foaming layer and the inner wall of the refrigerator shell, the heating element can stably raise the temperature of the outer wall of the refrigerator shell by D degrees under continuous working condition, and the algorithm logic of the lowest temperature C and D has the following two:

[0010] I. C=T-A-D;

[0011] II. The dew point temperature range is divided into n gradients from low to high: (T0, T1], (T1, T2]……(T(n-1), Tn], and the temperature lifting degree D of the heating element to the outer wall of the refrigerator shell is divided into n gradients: D1, D2……Dn, wherein Tn>T(n-1), Dn>Dn-1, when the calculated dew point temperature T falls into (T(a-1), Ta], the temperature lifting of the heating element to the outer wall of the refrigerator shell is Da, and at this time C=Ta-A-Da.

[0012] As a further improvement of the above technical solution, n=3.

[0013] As a further improvement of the above technical solution, the heating element is a heating wire.

[0014] The beneficial effects of the present application are as follows: the dew point temperature T is calculated according to the environmental temperature K and the environmental humidity B and combined with the water vapor dew point temperature calculation formula, the temperature T means that condensation will occur when the temperature of the surface of the refrigerator shell is lower than T, and the minimum thermal insulation temperature degree A of the foaming layer means that a stable temperature difference A between the refrigeration inner container and the outer surface of the refrigerator shell can be formed through the foaming layer within a stable time range, and the minimum temperature C at this temperature is set in this way, as long as the minimum temperature in the refrigeration inner container is not lower than C degrees, the surface temperature of the refrigerator shell will not be lower than T degrees, thereby avoiding the occurrence of condensation. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further explained and described below in conjunction with the drawings and specific embodiments.

[0016] Figure 1 The logic block diagram of the present application. DETAILED DESCRIPTION

[0017] This part will describe the specific embodiments of the present application in detail, and the preferred embodiments of the present application are shown in the drawings, and the drawings are used to supplement the description of the text part of the specification, so that people can intuitively and visually understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0018] In the description of the present application, several meanings are one or more, and multiple meanings are two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0019] In the description of the present application, the words such as setting, installing, connecting and the like should be understood in a broad sense unless otherwise explicitly limited, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0020] Reference Figure 1 A condensation control logic of a vehicle refrigerator, the vehicle refrigerator comprising a refrigerator shell, a refrigeration liner arranged in the refrigerator shell, an evaporator located on the refrigeration liner, a foaming layer located outside the refrigeration liner and inside the refrigerator shell, a compressor connected with the evaporator, and a condenser connected with the compressor and the evaporator, wherein a temperature sensor and a humidity sensor are arranged on the outer surface of the refrigerator shell, and the lowest heat insulation temperature of the foaming layer is A;

[0021] The condensation control logic is as follows:

[0022] Determine whether the refrigerator is in a refrigeration state, if so, detect the ambient temperature as K and the ambient humidity as B through the temperature sensor and the humidity sensor, calculate the dew point temperature T according to the ambient temperature K and the ambient humidity B and combining the water vapor dew point temperature calculation formula, and the lowest temperature in the refrigeration liner is C, wherein the algorithm logic of C and T is one of the following two:

[0023] I. C=T-A;

[0024] II. Divide the dew point temperature range from low to high into n gradients: (T0, T1], (T1, T2]……(T(n-1), Tn], wherein Tn>T(n-1), and when the calculated dew point temperature T falls within the range of (Ta-1, Ta], C=Ta-A.

[0025] Calculate the dew point temperature T according to the ambient temperature K and the ambient humidity B and combining the water vapor dew point temperature calculation formula, and the temperature T means that condensation will occur when the temperature of the outer surface of the refrigerator shell is lower than T, and the lowest heat insulation temperature of the foaming layer is A, which means that a stable temperature difference A is formed between the refrigeration liner and the outer surface of the refrigerator shell through the foaming layer within a stable time range, and the lowest temperature C at this temperature is set in this way, as long as the lowest temperature in the refrigeration liner is not lower than C degrees, the temperature of the outer surface of the refrigerator shell will not be lower than T degrees, thereby avoiding the occurrence of condensation.

[0026] For example, when the calculated dew point temperature T is 17 degrees, and the heat insulation temperature A of the foaming layer is 15 degrees,

[0027] When the algorithm logic of C and T is one, C=T-A=17-15=2 degrees, and at this time the lowest temperature in the refrigeration liner cannot be lower than 2 degrees through the control system.

[0028] When the algorithm logic of C and T is two logic, n=3 is taken, and T is divided into three gradients (0, 10], (10, 20], (20, 30], at this time C=Tn-A=20-15=5 degrees, at this time the lowest temperature in the refrigeration inner container cannot be lower than 5 degrees through the control system.

[0029] The insulation temperature degree of the foaming layer is obtained by actual experiment, and different models of vehicle refrigerators and different thicknesses of the foaming layer will result in different data. Moreover, since the increase of the environment temperature will cause the increase of the dew point temperature, and then the increase of the lowest temperature in the refrigeration inner container, so that the power of the compressor will also be reduced accordingly, and then the start-stop ratio of the vehicle refrigerator will be reduced, which can also achieve certain energy-saving effect.

[0031] Further optimization, since the dew point temperature is higher in the state of high humidity and high temperature, which will cause the lowest temperature in the refrigeration inner container to be higher, thus causing poor refrigeration effect, on this basis, considering setting a heating element between the foaming layer and the inner wall of the refrigerator shell, the temperature of the outer wall of the refrigerator shell is lifted by the heating element, so that the lowest temperature in the vehicle refrigerator can continue to be adjusted downward.

[0032] Preferably, the heating element is set between the surface of the foaming layer and the inner wall of the refrigerator shell, and the heating element can stably lift the temperature of the outer wall of the refrigerator shell by D degrees in the continuous working condition, and the algorithm logic of the lowest temperature C and D has the following two kinds:

[0033] I. C=T-A-D; under this logic, the user sets the lowest temperature C, according to the transformed formula D=T-A-C of the logic formula, so as to obtain the lifting data D of the temperature of the refrigerator shell by the heating element in the continuous working condition, and then adjust the power of the heating element according to D, the relationship between the power of the heating element and D is obtained by actual experimental data, and the power of the heating element is different when different models of vehicle refrigerators and different thicknesses of the refrigerator shell reach the stable lifting temperature D, and according to the specific implementation manner of the heating element, the power will also be different. When D reaches the maximum and cannot meet the set lowest temperature C, the lowest temperature C is automatically increased according to the actual situation to meet the above formula.

[0034] II. The dew point temperature range is divided into n gradients from low to high: (T0, T1], (T1, T2]……(T(n-1), Tn], and the temperature lifting degree D of the heating element to the outer wall of the refrigerator shell is divided into n gradients: D1, D2……Dn, wherein Tn>T(n-1), Dn>Dn-1, when the calculated dew point temperature T falls into (T(a-1), Ta], the lifting temperature of the heating element to the outer wall of the refrigerator shell is Da, and at this time C=Ta-A-Da. In this way, the lifting temperature of the heating element to the outer wall of the refrigerator shell is stably fixed to several data, so that the heating element can be conveniently driven, the circuit mode formed by driving the heating element is simpler, and only several fixed modes need to be formed.

[0035] Further optimization, preferably the heating element is a heating wire, so that the installation is simpler and the occupied space is smaller.

[0036] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structural transformation, direct or indirect application in other related technical fields based on the inventive concept of the present application is included in the patent protection range of the present application.

Claims

1. Anti-condensation control logic for a vehicle refrigerator, characterized in that: The vehicle-mounted refrigerator comprises a refrigerator shell, a refrigeration liner arranged in the refrigerator shell, an evaporator on the refrigeration liner, a foaming layer on the outside of the refrigeration liner and the inside of the refrigerator shell, a compressor connected with the evaporator, and a condenser connected with the compressor and the evaporator; the outer surface of the refrigerator shell is further provided with a temperature sensor and a humidity sensor, and the lowest heat insulation temperature of the foaming layer is A; The anti-condensation control logic is as follows: It is determined whether the refrigerator is in a refrigeration state; if so, the ambient temperature is detected by the temperature sensor and the ambient humidity is detected by the humidity sensor, and the dew point temperature T is calculated according to the ambient temperature K and the ambient humidity B and a water vapor dew point temperature calculation formula; the lowest temperature C in the refrigeration liner is calculated, and the refrigerator is refrigerated at a temperature not lower than the temperature C, wherein the algorithm logic of C and T is one of the following two: I. C = T - A; II. The dew point temperature range is divided into n gradients from low to high: (T0, T1], (T1, T2]……(T(n-1), Tn], wherein Tn > T(n-1), and when the calculated dew point temperature T falls within the range of (Ta-1, Ta], C = Ta - A.

2. The anti-condensation control logic of the vehicle-mounted refrigerator according to claim 1, wherein a heating element is arranged between the surface of the foaming layer and the inner wall of the refrigerator shell, the heating element can stably raise the temperature of the outer wall of the refrigerator shell by D degrees under continuous working conditions, and the algorithm logic of the lowest temperature C and D is as follows: I. C = T - A - D; II. The dew point temperature range is divided into n gradients from low to high: (T0, T1], (T1, T2]……(T(n-1), Tn], the temperature raising degree D of the heating element to the outer wall of the refrigerator shell is divided into n gradients: D1, D2……Dn, wherein Tn > T(n-1), and Dn > Dn-1, when the calculated dew point temperature T falls within the range of (T(a-1), Ta], the temperature raising degree of the heating element to the outer wall of the refrigerator shell is Da, and at this time C = Ta - A - Da.

3. The anti-condensation control logic of the vehicle-mounted refrigerator according to claim 1 or 2, wherein the n = 3.

4. The anti-condensation control logic of the vehicle-mounted refrigerator according to claim 2, wherein the heating element is a heating wire. ​ ​ ​

Images