Compressor and fan control method of frequency conversion refrigerator

Abstract

The invention discloses a compressor and fan control method of a frequency conversion refrigerator, which comprises the following specific steps: step 1, after the refrigerator is powered on, if the environment relative humidity acquired by a humidity sensor is greater than or equal to 78% and lasts for half an hour, carrying out step 2; secondly, the chamber temperature is controlled according to the minimum freezing-18 DEG C and the minimum refrigerating 4 DEG C, and according to which environment temperature section the environment temperature collected by an environment temperature sensor belongs to, a draught fan executes the corresponding rotating speed, and a compressor executes the corresponding rotating speed; and step 3, continuously judging the environment relative humidity acquired by the humidity sensor, if the environment relative humidity acquired by the humidity sensor is greater than or equal to 78%, continuing the step 2, and if the environment relative humidity acquired by the humidity sensor is less than 78%, starting from the step 1. According to the compressor and fan control method of the frequency conversion refrigerator, the rotating speed of the compressor and the rotating speed of the condensation fan are controlled by judging the temperature and humidity collected by the environment temperature and humidity sensor, and the problems of condensation of a door seal and a door handle and overflow of a water pan are solved.

Description

Technical field:

[0001] The present invention relates to a method for controlling a compressor and a fan of a variable frequency refrigerator, and belongs to the technical field of refrigerators. Background technology:

[0002] During refrigerator operation, because the compartment temperature is significantly lower than the ambient temperature, condensation is very likely to form in the contact area between the door and the door frame. To address this issue, current refrigerators generally install anti-condensation pipes within the door frame interlayer as a basic solution. Whether condensation forms on the refrigerator surface depends primarily on two key factors: the surface temperature of the refrigerator and the relative humidity of the outside air. Although refrigerators can maintain normal operation in normal humidity environments, condensation is still a frequent problem during the rainy season or in coastal areas with high humidity.

[0003] When a current inverter refrigerator is in use, the compressor starts and stops based on the freezing temperature, while the condensing fan and the compressor's reference gear are controlled by the ambient temperature. When the ambient temperature is high and the humidity is high, the refrigerator load is high, and the condensing fan speed and the compressor's reference speed are high. Under high humidity conditions, the following phenomena are likely to occur: (1) Condensation is easily formed in the weak insulation areas of the refrigerator, such as the door seal and door handle; (2) When users frequently open and close the door, the evaporator frosts, generating more defrost water and shortening the defrost cycle, and there is a risk of overflowing the water tray. Under high humidity conditions, condensation and overflowing will deteriorate the user experience.

[0004] Therefore, it is necessary to improve the existing technology to solve the shortcomings of the existing technology. Summary of the invention:

[0005] The present invention aims to solve the problems existing in the above-mentioned prior art and provides a method for controlling the compressor and fan of a variable frequency refrigerator, which can effectively avoid the risk of condensation on the surface of the refrigerator door seal and water overflow from the water collecting pan in a high humidity environment.

[0006] The present invention adopts the following technical solution: a method for controlling the compressor and fan of a variable frequency refrigerator, the specific steps of which are as follows:

[0007] Step 1: After the refrigerator is powered on, if the relative humidity of the environment collected by the humidity sensor is ≥ 78% and lasts for half an hour, proceed to step 2;

[0008] Step 2: The compartment temperature is controlled according to the lowest freezing temperature of -18℃ and the refrigeration temperature of 4℃. According to the ambient temperature segment collected by the ambient temperature sensor, the fan and the compressor will execute the corresponding speed;

[0009] Step 3: Continue to judge the relative humidity of the environment collected by the humidity sensor. If the relative humidity of the environment collected by the humidity sensor is ≥78%, continue with step 2. If the relative humidity of the environment collected by the humidity sensor is <78%, start from step 1.

[0010] Furthermore, in step 2, the range of the ambient temperature is set to Te1, Te2, Te3, Te4, and Te5, where Te1 <Te2<Te3<Te4<Te5。

[0011] Furthermore, in step 2, the condensing fan speed is set to Rf1, Rf2, and Rf3, where Rf1 <Rf2<Rf3。

[0012] Furthermore, in step 2, the compressor speed is set to: Rc1, Rc2, Rc3, Rc4, Rc5, Rc6, where Rc1 <Rc2<Rc3<Rc4<Rc5<Rc6。

[0013] Furthermore, in step 2, if the ambient temperature Te collected by the ambient temperature sensor is less than or equal to Te5, the compressor is operated at gear 1 and the condensing fan is operated at gear 1.

[0014] Furthermore, in step 2, if the ambient temperature Te collected by the ambient temperature sensor is greater than Te5, the compressor is operated at gear 3 and the condensing fan is operated at gear 2.

[0015] The present invention has the following beneficial effects: the compressor and fan control method of the variable frequency refrigerator of the present invention controls the speed of the compressor and the speed of the condensing fan by judging the temperature and humidity collected by the ambient temperature and humidity sensor, thereby solving the problems of condensation on the door seal and door handle and water overflow in the water receiving tray. Description of the drawings:

[0016] Figure 1 This is a schematic diagram of the refrigeration system of an air-cooled dual-system inverter refrigerator.

[0017] Figure 2 This is a flow chart of the compressor and fan control method of the variable frequency refrigerator of the present invention. Specific implementation method:

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] The air-cooled dual-system variable frequency refrigerator refrigeration system of the present invention includes an electromagnetic switching valve, a dryer, an anti-dew pipe, a compressor, a fin condenser, a refrigerated capillary tube, a refrigerated evaporation chamber, a frozen capillary tube, and a frozen evaporator. After the refrigerant exits the compressor, it first enters the fin condenser, then the anti-dew pipe, then the dryer, and finally the electromagnetic switching valve. The electromagnetic switching valve has one inlet and two outlets, and one of the outlets is connected to the refrigerated evaporator through the refrigerated capillary tube. After the refrigerant enters the refrigerated evaporator, it enters the frozen evaporator. Since the refrigerated evaporator and the frozen evaporator are connected in series and parallel, the other outlet is connected to the frozen evaporator through the frozen capillary tube. Finally, the refrigerant in these two routes returns from the frozen evaporator to the compressor.

[0020] The control method for the compressor and the blower of the variable-frequency refrigerator of the present invention is as follows:

[0021] Step 1: After the refrigerator is powered on, if the ambient relative humidity collected by the humidity sensor is ≥ 78% and lasts for half an hour, then proceed to Step 2;

[0022] Step 2: The compartment temperature is controlled at the lowest freezing temperature of -18°C and the refrigerating temperature of 4°C. According to which temperature range the ambient temperature collected by the ambient temperature sensor belongs to, the blower executes the corresponding rotational speed and the compressor executes the corresponding rotational speed;

[0023] In Step 2, the set intervals of the ambient temperature are Te1, Te2, Te3, Te4, Te5, where Te1 < Te2 < Te3 < Te4 < Te5; the set rotational speeds of the condensing blower are Rf1, Rf2, Rf3, where Rf1 < Rf2 < Rf3; the set rotational speeds of the compressor are: Rc1, Rc2, Rc3, Rc4, Rc5, Rc6, where Rc1 < Rc2 < Rc3 < Rc4 < Rc5 < Rc6; if the ambient temperature Te collected by the ambient temperature sensor is ≤ Te5, the compressor operates in the first gear and the condensing blower operates in the first gear; if the ambient temperature Te collected by the ambient temperature sensor is > Te5, the compressor operates in the third gear and the condensing blower operates in the second gear; the rotational speed comparison table of the condensing blower and the compressor under the corresponding ambient temperature ranges during normal operation is as follows:

[0024] Ambient temperature range Te1 Te2 Te3 Te4 Te5 Te6 Te7 Fan gear Rf1 Rf1 Rf2 Rf2 Rf2 Rf3 Rf3 Compressor speed Rc1 Rc2 Rc2 Rc3 Rc4 Rc5 Rc6

[0025] Step 3: Continuously judge the ambient relative humidity collected by the humidity sensor. If the ambient relative humidity collected by the humidity sensor is ≥ 78%, then continue with Step 2. If the ambient relative humidity collected by the humidity sensor is < 78%, then start from Step 1.

[0026] The control method for the compressor and the blower of the variable-frequency refrigerator of the present invention controls the rotational speed of the compressor and the rotational speed of the condensing blower by judging the temperature and humidity collected by the ambient temperature and humidity sensor, so as to solve the problems of condensation on the door seal and the door handle and water overflow in the water receiving tray.

[0027] The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A method for controlling a compressor and a fan of a variable frequency refrigerator, characterized in that: The specific steps are as follows: Step 1: After the refrigerator is powered on, if the relative humidity of the environment collected by the humidity sensor is ≥ 78% and lasts for half an hour, proceed to step 2; Step 2: The compartment temperature is controlled according to the lowest freezing temperature of -18℃ and the refrigeration temperature of 4℃. According to the ambient temperature segment collected by the ambient temperature sensor, the fan and the compressor will execute the corresponding speed; Step 3: Continue to judge the relative humidity of the environment collected by the humidity sensor. If the relative humidity of the environment collected by the humidity sensor is ≥78%, continue with step 2. If the relative humidity of the environment collected by the humidity sensor is <78%, start from step 1.

2. The method for controlling the compressor and fan of a variable frequency refrigerator according to claim 1, wherein: In step 2, the ambient temperature range is set to Te1, Te2, Te3, Te4, Te5, where Te1 <Te2<Te3<Te4<Te5。 3. The method for controlling the compressor and fan of a variable frequency refrigerator according to claim 2, wherein: In step 2, set the condensing fan speed to Rf1, Rf2, and Rf3, where Rf1 <Rf2<Rf3。 4. The method for controlling the compressor and fan of a variable frequency refrigerator according to claim 3, wherein: In step 2, set the compressor speed: Rc1, Rc2, Rc3, Rc4, Rc5, Rc6, where Rc1 <Rc2<Rc3<Rc4<Rc5<Rc6。 5. The method for controlling the compressor and fan of a variable frequency refrigerator according to claim 4, wherein: In step 2, if the ambient temperature Te collected by the ambient temperature sensor is less than or equal to Te5, the compressor and the condensing fan are operated at gear 1.

6. The method for controlling the compressor and fan of a variable frequency refrigerator according to claim 5, wherein: In step 2, if the ambient temperature Te collected by the ambient temperature sensor is greater than Te5, the compressor is operated at gear 3 and the condensing fan is operated at gear 2.

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