Direct-cooling frequency conversion refrigerator

Abstract

The invention provides a direct-cooling variable-frequency refrigerator, which comprises an acquisition module arranged in a refrigerator body, and the acquisition module is configured to acquire the temperature of a refrigerating chamber and the temperature of a freezing chamber; the memory module is in communication connection with the obtaining module and is configured to obtain a target permanent temperature according to the freezing chamber temperature within the preset number of days in each quarter; the cloud processing module is in communication connection with the acquisition module and is configured to acquire the target permanent temperature of the corresponding quarter; if the freezing chamber temperature is larger than the target permanent temperature and the refrigerating chamber temperature is smaller than the compressor starting temperature, a compensation heater is controlled to be started; when the temperature of the refrigerating chamber is larger than or equal to the starting temperature of the compressor, the refrigerating system is controlled to be started according to the preset gear until the temperature of the freezing chamber is smaller than or equal to the target permanent temperature, and the problems that an existing direct-cooling refrigerator is high in energy consumption and inaccurate in temperature control due to the fact that a fixed-frequency technology is adopted in the direct-cooling refrigerator are solved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a direct-cooling variable-frequency refrigerator. Background Art

[0002] As a traditional refrigeration equipment, the working principle of direct cooling refrigerator mainly relies on the refrigeration cycle driven by the compressor. In this cycle, the refrigerant flows in the coil and cools the inside of the refrigerator by cold radiation. However, among the direct cooling refrigerators currently on the market, most use machine-controlled fixed-speed compressors. This type of compressor consumes relatively high energy when in operation, and its temperature control method is relatively extensive because it uses a thermostat for temperature control.

[0003] Specifically, the machine-controlled constant-speed compressor controls the start and stop of the compressor by means of refrigeration temperature control. In this way, the temperature of the freezer often cannot be accurately controlled, but fluctuates with the start and stop of the compressor. This temperature instability can easily affect the quality of the food in the freezer, such as causing food spoilage and nutrient loss. At the same time, due to the extensive temperature control, the refrigeration effect of the refrigerator will also be affected to a certain extent, and insufficient or over-refrigeration may occur.

[0004] Although frequency conversion technology has been widely used in air-cooled refrigerators and has achieved significant energy-saving and temperature control effects, the application of frequency conversion technology in direct-cooling refrigerators, especially two-door or three-door single-cycle direct-cooling mechanical control refrigerators, is extremely limited. This is mainly due to the high price of the frequency conversion technology system and the limitations of the control method and control structure. Therefore, most direct-cooling refrigerators on the market currently use fixed-frequency technology, which leads to problems such as high energy consumption and inaccurate temperature control. Summary of the invention

[0005] The present application provides a direct cooling variable frequency refrigerator to solve the technical problems that the existing direct cooling refrigerators all adopt fixed frequency technology, resulting in high energy consumption and inaccurate temperature control of the direct cooling refrigerators.

[0006] The present application provides a direct cooling variable frequency refrigerator, comprising:

[0007] Set in the box:

[0008] An acquisition module, wherein the acquisition module is configured to:

[0009] Get the temperature of refrigerator and freezer;

[0010] A memory module, the memory module is communicatively connected with the acquisition module and is configured to:

[0011] According to the temperature of the freezer compartment within the preset number of days in each quarter, the target standing temperature is obtained;

[0012] A cloud processing module, the cloud processing module is in communication with the acquisition module and is configured to:

[0013] Obtaining the target standing temperature of the corresponding season;

[0014] If the freezing chamber temperature is greater than the target permanent temperature, and the refrigerating chamber temperature is less than the compressor start-up temperature, the compensating heater is controlled to turn on;

[0015] When the temperature of the refrigerating chamber is greater than or equal to the compressor startup temperature, the refrigeration system is controlled to start at a preset gear until the temperature of the freezing chamber is less than or equal to the target permanent temperature.

[0016] In some embodiments, the memory module is further configured to:

[0017] Get freezer temperature data within a preset number of days in each quarter;

[0018] According to the freezer compartment temperature data, the freezer compartment temperature with the largest proportion in the freezer compartment temperature data is obtained to obtain a target permanent temperature.

[0019] In some embodiments, the direct cooling variable frequency refrigerator further includes:

[0020] A refrigerated temperature sensor, which is disposed in the refrigerated room, is communicatively connected with the acquisition module and is configured as follows:

[0021] Get the refrigerator temperature;

[0022] A freezing temperature sensor, which is disposed in the freezing chamber and is communicatively connected to the acquisition module, and is configured as follows:

[0023] Get freezer temperature;

[0024] An ambient temperature sensor, which is disposed outside the box, is communicatively connected to the acquisition module and is configured as follows:

[0025] Get the ambient temperature.

[0026] In some embodiments, the refrigeration system comprises:

[0027] compressor;

[0028] A condenser, one end of which is connected to one end of the compressor through a refrigeration pipe;

[0029] A capillary tube, one end of which is connected to the other end of the condenser through a refrigeration pipe;

[0030] An evaporator, one end of the evaporator is connected to the other end of the compressor through a refrigeration pipeline.

[0031] In some embodiments, the cloud processing module is further configured to:

[0032] If the temperature of the refrigerating chamber is lower than the compressor shutdown point temperature, or the compressor operation time is greater than or equal to the first preset time and the ambient temperature is lower than the preset temperature, the refrigeration system is controlled to be shut down.

[0033] In some embodiments, the direct cooling variable frequency refrigerator further includes:

[0034] A control panel, the control panel is arranged on the door body of the refrigerating chamber, and a display area and a gear adjustment button are arranged on the control panel, the display area is used to display the preset gear; the preset gear includes: a first gear, a second gear, a third gear, a fourth gear, and a fifth gear; when the first gear to the fifth gear are turned on in sequence, the operating power of the compressor gradually increases;

[0035] The gear adjustment button is used to adjust the operating gear of the refrigeration system.

[0036] In some embodiments, a quick cooling gear is further provided on the control panel; when the quick cooling gear is turned on, the operating power of the compressor is at a maximum value.

[0037] In some embodiments, the cloud processing module is further configured to:

[0038] Get the refrigerator power-on time;

[0039] If the power-on time is less than the second preset time, the refrigeration system will not be turned on until the power-on time is greater than or equal to the second preset time, and the freezer compartment temperature and the refrigerator compartment temperature are greater than or equal to the compressor start-up temperature, and the refrigeration system is controlled to start according to the preset gear.

[0040] In some embodiments, the direct cooling variable frequency refrigerator further includes:

[0041] A lighting warning light, which is arranged on the top of the cold storage room;

[0042] A door switch, wherein the door switch is arranged in the refrigerating chamber, and the door switch is electrically connected to the lighting warning light; when the door switch is in a first state position, the lighting warning light is turned on, and when the door switch is in a second state position, the lighting warning light is turned off.

[0043] In some embodiments, when the time that the door switch is in the first state is greater than a third preset time, the lighting warning light flashes at a preset frequency and emits an alarm sound.

[0044] The present application provides a direct-cooling variable-frequency refrigerator, comprising: an acquisition module arranged in a box body, the acquisition module being configured to: acquire the temperature of a refrigerator compartment and a freezer compartment; a memory module, the memory module being communicatively connected to the acquisition module, and being configured to: obtain a target permanent temperature according to the temperature of the freezer compartment within a preset number of days in each quarter; a cloud processing module, the cloud processing module being communicatively connected to the acquisition module, and being configured to: acquire the target permanent temperature of the corresponding quarter; if the temperature of the freezer compartment is greater than the target permanent temperature, and the temperature of the refrigerator compartment is less than the start-up temperature of the compressor, controlling the compensation heater to turn on; when the temperature of the refrigerator compartment is greater than or equal to the start-up temperature of the compressor, controlling the refrigeration system to turn on according to a preset gear until the temperature of the freezer compartment is less than or equal to the target permanent temperature, so as to solve the problem that current direct-cooling refrigerators all adopt fixed-frequency technology, resulting in high energy consumption and inaccurate temperature control of direct-cooling refrigerators. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 This is a schematic diagram of the structure of the internal components of the direct cooling variable frequency refrigerator in this application;

[0047] Figure 2 This is a schematic diagram of the structure of a direct cooling variable frequency refrigerator in this application at a certain angle;

[0048] Figure 3 This is a schematic diagram of the structure of the direct cooling variable frequency refrigerator in this application from another angle;

[0049] Figure 4 It is a structural schematic diagram of the refrigeration system in this application;

[0050] Figure 5 This is a workflow diagram of the cloud processing module in this application;

[0051] Figure 6 Schematic diagram of the structure of the control panel in this application.

[0052] Description of reference numerals:

[0053] 1-acquisition module; 11-refrigeration temperature sensor; 12-freezing temperature sensor; 13-ambient temperature sensor; 2-memory module; 3-cloud processing module; 4-refrigeration system; 41-compressor; 42-condenser; 43-capillary tube; 44-evaporator; 5-control panel; 51-display area; 52-gear adjustment button; 6-lighting warning light; 7-door switch. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0055] In some technologies, direct cooling refrigerators all use fixed frequency technology, which results in high energy consumption and inaccurate temperature control of direct cooling refrigerators. In order to solve this technical problem, the present application provides a direct cooling variable frequency refrigerator. The structures of various parts of the direct cooling variable frequency refrigerator are described below:

[0056] Depend on Figure 1 It can be seen that the present application provides a direct cooling variable frequency refrigerator, characterized in that it includes: an acquisition module 1 arranged in the box, the acquisition module 1 is configured to: obtain the temperature of the refrigerator compartment and the temperature of the freezer compartment; a memory module 2, the memory module 2 is connected in communication with the acquisition module 1, and is configured to: obtain the target permanent temperature according to the temperature of the freezer compartment within a preset number of days in each quarter; a cloud processing module 3, the cloud processing module 3 is connected in communication with the acquisition module 1, and is configured to: the specific process is as follows Figure 5 As shown, the target permanent temperature of the corresponding quarter is obtained; if the temperature of the freezer compartment is greater than the target permanent temperature, and the temperature of the refrigerator compartment is less than the compressor startup temperature, the compensation heater is controlled to be turned on; when the temperature of the refrigerator compartment is greater than or equal to the compressor startup temperature, the refrigeration system 4 is controlled to be turned on according to the preset gear until the temperature of the freezer compartment is less than or equal to the target permanent temperature. When the temperature of the freezer compartment is greater than the target permanent temperature, and the temperature of the refrigerator compartment is less than the compressor startup temperature, in order to prevent the temperature of the refrigerator compartment from being too low during refrigeration by the refrigeration system 4, the temperature of the refrigerator compartment is increased by turning on the compensation heater until the temperature of the refrigerator compartment is greater than or equal to the compressor startup temperature, and the refrigeration system 4 is controlled to be turned on according to the preset gear to complete the refrigeration work of the refrigerator.

[0057] Exemplarily, the compressor 41 in the refrigeration system 4 is a variable frequency compressor, and different gears correspond to different operating powers of the variable frequency compressor, thereby reducing the power consumption of the refrigerator and improving the energy-saving performance of the refrigerator.

[0058] In this embodiment, the memory module 2 is further configured to: obtain freezer temperature data within a preset number of days in each quarter; according to the freezer temperature data, obtain the freezer temperature that accounts for the largest proportion of the freezer temperature data to obtain the target permanent temperature. The main function of the memory module 2 is to accurately record and store the target permanent temperature of the freezer, which is regarded as the normally open temperature of the freezer, aiming to meet the personalized needs of users for refrigerator use in different seasons. The module can memorize and analyze the specific habits of users using refrigerators in each season, and then automatically update the target permanent temperature once a year to ensure that the operating efficiency of the refrigerator is always consistent with the user's usage preferences. Specifically, the memory module 2 records four quarters respectively: the first quarter is January to March, the second quarter is April to June, the third quarter is July to September, and the fourth quarter is October to December. In order to accurately determine the target permanent temperature of each quarter, the memory module 2 will make full use of the data collected by the acquisition module 1. In the first 15 days of each quarter, the acquisition module 1 will continuously monitor and record the temperature data of the freezer, which will then be passed to the memory module 2 as reference data. After receiving these reference data, the memory module 2 will conduct detailed analysis and processing. It will count the number of times each temperature appears, and determine the most common freezer temperature, i.e., the target permanent temperature, based on the frequency of occurrence. This ensures that the refrigerator can automatically adjust to the user's most preferred refrigeration state in that season, thereby avoiding the trouble of users frequently manually adjusting the refrigeration gear due to seasonal changes, and ensuring the freshness and preservation quality of the food inside the refrigerator. Through the setting of the memory module 2, the refrigerator can not only adjust the refrigeration temperature according to the user's actual usage habits, but also improve the user's convenience and comfort in life to a certain extent.

[0059] Depend on Figure 3 It can be known that the direct cooling variable frequency refrigerator further includes: a refrigeration temperature sensor 11, which is arranged in the refrigeration chamber, and the refrigeration temperature sensor 11 is communicatively connected with the acquisition module 1, and is configured to: obtain the temperature of the refrigeration chamber; a freezing temperature sensor 12, which is arranged in the freezing chamber, and the freezing temperature sensor 12 is communicatively connected with the acquisition module 1, and is configured to: obtain the temperature of the freezing chamber; an ambient temperature sensor 13, which is arranged outside the box, and the ambient temperature sensor 13 is communicatively connected with the acquisition module 1, and is configured to: obtain the ambient temperature.

[0060] Depend on Figure 4It can be seen that the refrigeration system 4 includes: a compressor 41; a condenser 42, one end of the condenser 42 is connected to one end of the compressor 41 through a refrigeration pipe; a capillary tube 43, one end of the capillary tube 43 is connected to the other end of the condenser 42 through a refrigeration pipe; an evaporator 44, one end of the evaporator 44 is connected to the other end of the compressor 41 through a refrigeration pipe. The refrigeration system 4 includes an evaporator 44, a compressor 41, a condenser 42, and a capillary tube 43. The evaporator 44 is a heat-absorbing component, which evaporates the low-temperature and low-pressure liquid from the capillary tube 43 into low-temperature steam through heat exchange with the external environment, and is installed on the side of the refrigerator's cold storage room and freezer room away from the door body; the compressor 41 is the heart of the refrigerator's refrigeration system, and is a driven fluid machine that lifts low-pressure gas to high-pressure gas. The low-temperature steam from the evaporator 44 is compressed into high-temperature and high-pressure gas, and the continuous flow of refrigerant liquid and steam are all achieved with the help of the compressor 41; the condenser 42 is a heat-dissipating component, which cools the high-temperature and high-pressure gas from the compressor 41 into high-temperature and high-pressure liquid through heat exchange with the external environment; the capillary tube 43 is a resistance component, which converts the high-temperature and high-pressure liquid into a low-temperature and low-pressure liquid through resistance throttling.

[0061] In this embodiment, the cloud processing module 3 is further configured to: if the temperature of the refrigerator compartment is less than the compressor stop point temperature, or the compressor 41 runs for a time greater than or equal to a first preset time and the ambient temperature is less than a preset temperature, the refrigeration system 4 is controlled to be turned off. Exemplarily, if the temperature of the refrigerator compartment is less than the compressor stop point temperature, or the compressor 41 runs for a time greater than or equal to 240 minutes and the ambient temperature is less than 36°, the refrigeration system 4 is controlled to be turned off. It can be understood that when the temperature of the refrigerator compartment is less than the compressor stop point temperature, the refrigerator has reached the refrigeration demand, and the refrigeration system 4 can be turned off; to prevent the compressor from running for too long and causing damage to the compressor 41 due to overheating, the refrigeration system 4 is turned off when the compressor 41 runs for a time greater than or equal to 240 minutes, and when the ambient temperature is not less than 36°, to prevent the external ambient temperature from being too high, the compressor 41 is turned off, causing the temperature of the refrigerator compartment and the freezer compartment to rise, resulting in the corruption of food in the refrigerator, and the refrigeration system 4 will not be turned off when the ambient temperature is greater than 36°.

[0062] Depend on Figure 6It can be known that the direct cooling variable frequency refrigerator further includes: a control panel 5, the control panel 5 is arranged on the door of the refrigerating chamber, and a display area 51 and a gear adjustment button 52 are arranged on the control panel 5, the display area 51 is used to display the preset gear; the preset gear includes: the first gear, the second gear, the third gear, the fourth gear, and the fifth gear; when the first gear to the fifth gear are turned on in sequence, the operating power of the compressor 41 gradually increases; the gear adjustment button 52 is used to adjust the operating gear of the refrigeration system 4. Each time the gear adjustment button 52 is pressed, the gear indicator light displayed in the current display area 51 goes out, the next gear indicator light flashes, and the gear modification state is entered. If the user does not perform other operations after 5 seconds, it is considered that the gear setting is successful, otherwise it is considered an invalid operation; once the setting takes effect, the corresponding gear is immediately entered for operation control, and the gear indicator light is lit, and the temperature gear setting cycle sequence is: the third gear, the second gear, the first gear, the quick cooling gear, the fifth gear, the fourth gear, and the third gear.

[0063] Depend on Figure 6 It can be seen that the control panel 5 is also provided with a quick cooling gear; when the quick cooling gear is turned on, the operating power of the compressor 41 is at the maximum value. The quick cooling gear is used for rapid freezing to accelerate the cooling process, so that the temperature inside the refrigerator is rapidly reduced, thereby achieving the purpose of rapid freezing of food. It is suitable for scenarios where a large amount of fresh food needs to be quickly frozen, such as meat, seafood or vegetables. Maintain the freshness and taste of food. Through rapid freezing, the moisture in the food can quickly form ice crystals, thereby retaining the freshness and nutrients of the food to the greatest extent. At the same time, rapid freezing can also effectively avoid the risk of food spoilage. Extend the shelf life of food. In the quick cooling gear, food can quickly reach a low temperature state, thereby slowing down the activity of microorganisms and enzymes and extending the shelf life of food.

[0064] In this embodiment, the cloud processing module 3 is further configured to: obtain the power-on time of the refrigerator; if the power-on time is less than the second preset time, the refrigeration system 4 is not turned on until the power-on time is greater than or equal to the second preset time, and the temperature of the freezer compartment and the temperature of the refrigerator compartment are greater than or equal to the compressor start-up temperature, and the refrigeration system 4 is controlled to be turned on according to the preset gear. By obtaining the power-on time of the refrigerator, if the power-on time is less than 5 minutes, the refrigeration system 4 is not turned on until the power-on time is greater than or equal to 5 minutes, and the temperature of the freezer compartment and the temperature of the refrigerator compartment are greater than or equal to the compressor start-up temperature, and the refrigeration system 4 is controlled to be turned on according to the preset gear, which is used to protect the compressor 41. The compressor 41 is the core component of the refrigerator refrigeration system and requires a large current when it is started. If the power supply is unstable or fluctuating, directly starting the compressor 41 may cause damage to it. By delaying the start, the compressor 41 can be prevented from being frequently started and stopped in a short time, thereby extending its service life.

[0065] Depend on Figure 2 It can be known that the direct cooling variable frequency refrigerator further includes: a lighting warning light 6, which is arranged on the top of the refrigerating chamber; the lighting warning light 6 is used to illuminate the refrigerating chamber; a door switch 7, which is arranged in the refrigerating chamber, and the door switch 7 is electrically connected to the lighting warning light 6; when the door switch 7 is in the first state position, the lighting warning light 6 is turned on, and when the door switch 7 is in the second state position, the lighting warning light 6 is turned off. When the door body of the refrigerating chamber is opened, the lighting warning light 6 is turned on, and when the door body of the refrigerating chamber is closed, the lighting warning light 6 is turned off, so as to facilitate users to take food in the refrigerating chamber.

[0066] In this embodiment, when the time when the door switch 7 is in the first state position is greater than the third preset time, the lighting warning light 6 flashes at a preset frequency and emits an alarm sound. The preset frequency is 1HZ, that is, the lighting warning light 6 lights up for 0.5s, turns off for 0.5s, and emits an alarm sound to remind the user that the refrigerator door is in an open state. In the alarm state, the user can cancel the flashing of the lighting warning light 6 and the alarm sound by closing the door.

[0067] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A direct cooling variable frequency refrigerator, characterized in that: include: Set in the box: An acquisition module (1), wherein the acquisition module (1) is configured to: Get the temperature of refrigerator and freezer; A memory module (2), the memory module (2) being in communication connection with the acquisition module (1) and being configured as follows: According to the temperature of the freezer compartment within the preset number of days in each quarter, the target standing temperature is obtained; A cloud processing module (3), the cloud processing module (3) is in communication with the acquisition module (1) and is configured to: Obtaining the target standing temperature of the corresponding season; If the freezing chamber temperature is greater than the target permanent temperature, and the refrigerating chamber temperature is less than the compressor start-up temperature, the compensating heater is controlled to turn on; When the temperature of the refrigerating chamber is greater than or equal to the compressor startup temperature, the refrigeration system (4) is controlled to start at a preset gear until the temperature of the freezing chamber is less than or equal to the target permanent temperature.

2. A direct cooling variable frequency refrigerator according to claim 1, characterized in that: The memory module (2) is further configured as follows: Get freezer temperature data within a preset number of days in each quarter; According to the freezer compartment temperature data, the freezer compartment temperature with the largest proportion in the freezer compartment temperature data is obtained to obtain a target permanent temperature.

3. A direct cooling variable frequency refrigerator according to claim 1, characterized in that: Also includes: A refrigerated temperature sensor (11), the refrigerated temperature sensor (11) is arranged in the refrigerated room, the refrigerated temperature sensor (11) is communicatively connected with the acquisition module (1), and is configured as follows: Get the refrigerator temperature; A freezing temperature sensor (12), the freezing temperature sensor (12) being arranged in the freezing chamber, the freezing temperature sensor (12) being communicatively connected to the acquisition module (1), and being configured as follows: Get freezer temperature; An ambient temperature sensor (13), the ambient temperature sensor (13) being arranged outside the box, the ambient temperature sensor (13) being communicatively connected to the acquisition module (1), and being configured as follows: Get the ambient temperature.

4. A direct cooling variable frequency refrigerator according to claim 3, characterized in that: The refrigeration system (4) comprises: Compressor (41); A condenser (42), one end of the condenser (42) being connected to one end of the compressor (41) via a refrigeration pipe; A capillary tube (43), one end of the capillary tube (43) being connected to the other end of the condenser (42) via a refrigeration pipe; An evaporator (44), one end of the evaporator (44) is connected to the other end of the compressor (41) through a refrigeration pipeline.

5. A direct cooling frequency conversion refrigerator according to claim 4, characterized in that: The cloud processing module (3) is further configured to: If the temperature of the refrigerating chamber is lower than the compressor shutdown point temperature, or the running time of the compressor (41) is greater than or equal to a first preset time and the ambient temperature is lower than a preset temperature, the refrigeration system (4) is controlled to be shut down.

6. A direct cooling frequency conversion refrigerator according to claim 4, characterized in that: Also includes: A control panel (5), the control panel (5) being arranged on the door body of the refrigerating chamber, the control panel (5) being provided with a display area (51) and a gear adjustment button (52), the display area (51) being used to display a preset gear; the preset gears comprising: a first gear, a second gear, a third gear, a fourth gear, and a fifth gear; when the first gear to the fifth gear are sequentially turned on, the operating power of the compressor (41) gradually increases; The gear adjustment button (52) is used to adjust the operating gear of the refrigeration system (4).

7. A direct cooling variable frequency refrigerator according to claim 6, characterized in that: The control panel (5) is also provided with a rapid cooling gear; when the rapid cooling gear is turned on, the operating power of the compressor (41) is at a maximum value.

8. The direct cooling variable frequency refrigerator according to claim 1, characterized in that: The cloud processing module (3) is further configured to: Get the refrigerator power-on time; If the power-on time is less than the second preset time, the refrigeration system (4) will not be turned on until the power-on time is greater than or equal to the second preset time, and the freezer compartment temperature and the refrigerator compartment temperature are greater than or equal to the compressor start-up temperature, and the refrigeration system (4) is controlled to be turned on according to the preset gear.

9. The direct cooling variable frequency refrigerator according to claim 1, characterized in that: Also includes: A lighting warning light (6), wherein the lighting warning light (6) is arranged on the top of the cold storage chamber; A door switch (7), wherein the door switch (7) is arranged in the refrigerating chamber, and the door switch (7) is electrically connected to the lighting warning light (6); when the door switch (7) is in a first state position, the lighting warning light (6) is turned on, and when the door switch (7) is in a second state position, the lighting warning light (6) is turned off.

10. The direct cooling variable frequency refrigerator according to claim 9, characterized in that: When the time that the door switch (7) is in the first state position is greater than a third preset time, the lighting warning light (6) flashes at a preset frequency and emits an alarm sound.

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