CN106642910A - Temperature control method for refrigerating and freezing equipment and refrigerating and freezing equipment - Google Patents

Abstract

The invention provides a temperature control method for refrigerating and freezing equipment and the refrigerating and freezing equipment. The temperature control method includes: detecting the actual temperature of the sealed space; judging whether the actual temperature is greater than or equal to a preset first temperature value; if so, detecting whether the air compressor is in a working state, and driving the switching mechanism when the result is no connecting the air compressor to the air flow pipeline of the sealed space, closing the air flow pipeline from the air compressor to the adsorption bed assembly; The temperature of the enclosed space. The solution of the present invention not only ensures the airtightness of the sealed space, but also can precisely adjust the temperature inside the sealed space to improve the food storage effect.

Description

Temperature control method for refrigerating and freezing equipment and refrigerating and freezing equipment

technical field

The invention relates to the field of item storage, in particular to a temperature control method for refrigerating and freezing equipment and the refrigerating and freezing equipment.

Background technique

With the development of society and the improvement of people's living standards, and people's pace of life is getting faster and faster, people often buy a large number of items placed in various refrigeration and freezing equipment, but for leafy vegetables and melon and fruit foods, refrigeration and freezing The low temperature in the appliance's storage compartment will not only wrinkle and blotch the skin of these foods, but also affect their original taste and nutrition.

Nitrogen, as a colorless, non-toxic, odorless inert gas, has been widely used in the field of food preservation. Filling the storage compartment of refrigeration and freezing equipment with nitrogen to balance the carbon dioxide and oxygen in it can effectively delay the storage of food. Oxidative deterioration and decay of stored materials, so as to achieve food preservation.

In the prior art, a sealed space is often set in the storage room as a fresh-keeping room. In order to ensure the fresh-keeping effect in the sealed space, the airtightness of the sealed space is higher, which also makes the temperature in the sealed space unable to be adjusted through the damper. , and the cold energy can only be transferred to the sealed space through the low temperature of the refrigerated compartment. This method of lowering the temperature makes the temperature of the sealed space drop slowly, and the temperature cannot be adjusted accurately, which affects the storage effect of the food in the sealed space, thereby reducing the user experience.

Contents of the invention

An object of the present invention is to provide a method for regulating the temperature of a sealed space of a refrigerating and freezing device.

A further object of the present invention is to make the temperature in the sealed space of the refrigerating and freezing equipment meet the freshness preservation requirements.

In particular, the present invention provides a temperature control method for refrigerating and freezing equipment, wherein a sealed space is provided inside the storage compartment of the refrigerating and freezing equipment, and the refrigerating and freezing equipment is provided with an air compressor for supplying nitrogen to the sealed space, An adsorption bed assembly and an air flow pipeline with a switching mechanism, and the temperature control method includes: detecting the actual temperature of the sealed space; judging whether the actual temperature is greater than or equal to the preset first temperature value; if so, detecting whether the air compressor is working state, and when the result is negative, drive the switching mechanism to connect the airflow pipeline from the air compressor to the sealed space, close the airflow pipeline from the air compressor to the adsorption bed assembly; and control the air compressor to run at a preset first rotational speed , to inject the sucked low-temperature air into the sealed space to reduce the temperature of the sealed space.

Optionally, before the step of detecting the actual temperature of the sealed space, it also includes: detecting the nitrogen concentration of the sealed space; judging whether the nitrogen concentration is less than the preset concentration value; if so, driving the switching mechanism to connect the air compressor to the air flow pipe of the adsorption bed assembly circuit, close the air flow pipeline from the air compressor to the sealed space; and control the working time of the air compressor and the adsorption bed assembly to provide nitrogen to the sealed space, wherein the air compressor runs at a preset second speed, and the first The second rotational speed is greater than the first rotational speed.

Optionally, the step of judging whether the actual temperature is greater than or equal to the preset first temperature value includes: obtaining category information of the food in the sealed space; matching the category information in the preset temperature table to obtain the corresponding first temperature value , the temperature table stores the first temperature value and the second temperature value corresponding to different types of food obtained through testing in advance, wherein the first temperature value is greater than the second temperature value.

Optionally, the step of obtaining the category information of the food in the sealed space includes: using the keys arranged on the refrigerating and freezing equipment to obtain the user's input operation, so as to determine the category information according to the input operation, wherein the keys are configured according to the category of the food, and the refrigerated The freezer is provided with one or more buttons.

Optionally, after the step of controlling the air compressor to run at the preset first rotational speed, it also includes: matching the category information in the preset temperature table to obtain a corresponding second temperature value; judging whether the actual temperature of the sealed space is is less than or equal to the second temperature value; and if so, controlling the air compressor to stop running.

According to another aspect of the present invention, there is also provided a refrigerating and freezing device, the refrigerating and freezing device has a storage compartment, and a sealed space is arranged inside the storage compartment, and the refrigerating and freezing device also includes: a nitrogen generating device configured The nitrogen gas is supplied to the sealed space; the temperature sensor is configured to detect the actual temperature of the sealed space; the state detection device is configured to detect whether the air compressor is in a working state; and the nitrogen generating device includes an air compressor, an adsorption bed assembly and a switching mechanism The nitrogen generating device is also configured to: when the actual temperature is greater than or equal to the preset first temperature value and the air compressor is not in working condition, drive the switching mechanism to connect the air compressor to the air flow pipe of the sealed space Road, close the air flow pipeline from the air compressor to the adsorption bed assembly; and control the air compressor to run at a preset first speed, so as to inject the sucked low-temperature air into the sealed space to reduce the temperature of the sealed space.

Optionally, the refrigerating and freezing equipment further includes: a concentration sensor configured to detect the nitrogen concentration in the sealed space; and the nitrogen generator is further configured to: when the nitrogen concentration is less than a preset concentration value, drive the switching mechanism to communicate with the air compressor To the airflow pipeline of the adsorption bed assembly, close the airflow pipeline from the air compressor to the sealed space; The second rotational speed operates, and the second rotational speed is greater than the first rotational speed.

Optionally, the refrigerating and freezing equipment further includes: keys, set on the refrigerating and freezing equipment, configured to acquire user input operations to determine category information according to the input operations, wherein the keys are configured according to the category of food, and the refrigerating and freezing equipment is set There are one or more buttons; the temperature matching device is configured to match the corresponding first temperature value in the preset temperature table according to the category information, and the temperature table stores the corresponding temperature values of different categories of food obtained in advance through testing. A first temperature value and a second temperature value, wherein the first temperature value is greater than the second temperature value.

Optionally, the temperature matching device is further configured to obtain a corresponding second temperature value by matching in the preset temperature table according to category information; the nitrogen generating device is also configured to: the actual temperature in the sealed space is less than or equal to the second temperature value, the control air compressor stops running.

Optionally, the refrigerating and freezing equipment further includes: a sealed drawer disposed inside the storage compartment, and a sealed space is defined by the sealed drawer.

The temperature control method for refrigerating and freezing equipment and the refrigerating and freezing equipment of the present invention, wherein the storage compartment of the refrigerating and freezing equipment is provided with a sealed space, and the refrigerating and freezing equipment is provided with an air compressor and an adsorption bed for providing nitrogen to the sealed space The component and the airflow pipeline with a switching mechanism, by detecting the actual temperature of the sealed space, when the actual temperature is greater than or equal to the preset first temperature value, and the air compressor is not in the working state, the switching mechanism is driven to communicate with the air compressor to Close the airflow pipeline of the sealed space, close the airflow pipeline from the air compressor to the adsorption bed assembly, and control the air compressor to run at the preset first speed, so as to directly inject the sucked low-temperature air into the sealed space to reduce the temperature of the sealed space , which not only ensures the airtightness of the sealed space, but also can precisely adjust the temperature inside the sealed space to improve the storage effect of food.

Further, the temperature control method for refrigerating and freezing equipment and the refrigerating and freezing equipment of the present invention switch the communication relationship between the air compressor, the adsorption bed assembly and the sealed space through the switching mechanism, and connect the air compressor to the air flow pipeline of the sealed space, Closing the airflow pipeline from the air compressor to the adsorption bed assembly can provide lower temperature air to the sealed space; connecting the airflow pipeline from the air compressor to the adsorption bed assembly, closing the airflow pipeline from the air compressor to the sealed space can To provide higher temperature nitrogen to the sealed space, the nitrogen concentration and temperature can be adjusted accurately according to the actual situation of the sealed space, so that the nitrogen concentration and temperature in the sealed space can meet the freshness requirements of food.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic diagram of the internal structure of a refrigerating and freezing device according to one embodiment of the present invention;

Fig. 2 shows the external structure of the refrigerating and freezing equipment shown in Fig. 1;

Fig. 3 is a schematic structural view of a nitrogen generating device in a refrigerating and freezing device according to an embodiment of the present invention;

Fig. 4 shows another working state of the nitrogen making device shown in Fig. 3;

Fig. 5 is a schematic block diagram of a refrigerating and freezing device according to an embodiment of the present invention;

Figure 6 is a schematic block diagram of a refrigerating and freezing device according to another embodiment of the present invention;

7 is a schematic diagram of a temperature control method for refrigeration and freezing equipment according to an embodiment of the present invention; and

Fig. 8 is a detailed flowchart of a temperature control method for a refrigerating and freezing device according to an embodiment of the present invention.

detailed description

This embodiment first provides a refrigerating and freezing device 100. FIG. 1 is a schematic diagram of the internal structure of a refrigerating and freezing device 100 according to an embodiment of the present invention. FIG. 2 shows the external structure of the refrigerating and freezing device 100 shown in FIG. 1. Fig. 3 is a schematic structural diagram of a nitrogen generator in a refrigerating and freezing device according to an embodiment of the present invention, and Fig. 5 is a schematic block diagram of a refrigerating and freezing device according to an embodiment of the present invention. The refrigerating and freezing equipment 100 may be a refrigerator, a freezer, and the like.

As shown in Figure 1, the refrigerating and freezing equipment 100 of the present embodiment has a storage compartment 10, and the inside of the storage compartment 10 is provided with a sealed space 11, and the refrigerating and freezing equipment 100 is also provided with a nitrogen generator 20 to provide air to the sealed space. 11 supply nitrogen. In this embodiment, the storage compartment 10 is provided with a sealed box 12, and the above-mentioned sealed space 11 can be defined by the sealed box 12. In some optional embodiments, the above-mentioned sealed space 11 can also be defined by a sealed drawer, a sealed tank , Sealed boxes, etc. are limited. As shown in FIG. 2 , the refrigerating and freezing device 100 further includes a button 14, which can acquire user input operations.

The nitrogen generating device 20 can provide nitrogen gas to the sealed space 11 . The nitrogen generating device 20 of this embodiment can use the PSA nitrogen generating method to remove oxygen in the air to generate pure nitrogen. PSA (Pressure Swing Adsorption) specifically refers to pressurizing the mixed gas under the condition of constant temperature, and using the adsorbent to absorb the excess impurity gas to obtain a relatively pure single gas, and then decompressing (vacuumizing) ) or normal pressure method to desorb the impurity gas in the adsorbent for secondary use of the adsorbent.

As shown in FIG. 3 , the nitrogen generating device 20 of this embodiment may include an air compressor 21 , an adsorption bed assembly 22 and a gas flow pipeline 23 with a switching mechanism 231 . The air compressor 21 provides compressed air to the adsorption bed assembly 22, and the oxygen adsorbent is arranged inside the adsorption bed assembly 22. The adsorption bed assembly 22 uses compressed air as a raw material, uses pressure swing adsorption technology, and utilizes the selection of oxygen and nitrogen by the adsorbent. The nitrogen and oxygen in the air are separated to produce pure nitrogen gas, and the nitrogen gas is transported to the sealed space 11 through the gas flow pipeline 23 .

As shown in FIG. 5 , the refrigerating and freezing device 100 of this embodiment further includes: a temperature sensor 30 and a state detection device 40 .

Wherein, the temperature sensor 30 may be configured to detect the actual temperature of the sealed space 11 . The state detection device 40 may be configured to detect whether the air compressor 21 is in a working state. The nitrogen generator 20 is also configured to: when the actual temperature is greater than or equal to the preset first temperature value and the air compressor 21 is not in the working state, the switching mechanism 231 is driven to connect the air compressor 21 to the air flow pipe of the sealed space 11 Road, close the air flow pipeline from air compressor 21 to adsorption bed assembly 22; The preset first temperature value is related to the category of the food, and since the suitable storage temperature for different categories of food is different, it can be preset according to the category of the food.

The suction port of the air compressor 21 may be arranged near the evaporator of the refrigerating and freezing device 100 to suck air with a lower temperature. The preset first rotation speed value is relatively low, and the air compressor 21 operates at a low rotation speed, which can ensure that it sucks cold air with a pressure close to the normal pressure, and avoids heating up the low-temperature air during the compression process and directly sucking the cold air sucked in from the evaporator. into the sealed space 11. When the air compressor 21 is not in the working state, by discharging cold air with a lower temperature into the sealed space 11 to adjust the temperature, it can avoid affecting the normal nitrogen production work of the air compressor 21 and ensure that the nitrogen concentration of the sealed space 11 meets the requirements .

As shown in FIG. 3 , the switching mechanism 231 for switching the communication relationship between the air compressor 21 , the adsorption bed assembly 22 and the sealed space 11 may be a three-way valve. The gas inlet of the three-way valve is connected to the gas outlet of the gas compressor 21, and its two gas outlets are respectively connected to the gas inlet of the adsorption bed assembly 22 and the gas inlet of the sealed space 11, so as to switch the sealed space 11 through the three-way valve direction of gas inflow. The use of the three-way valve above is only an optional implementation of switching the communication relationship between the air compressor 21, the adsorption bed assembly 22, and the sealed space 11. In some other embodiments, it can be realized through other pipelines and valve structures. Switching of the refrigerant direction. For example, the switching mechanism 231 can be two solenoid valves, which are respectively arranged on the airflow pipeline from the air compressor 21 to the sealed space 11 and on the airflow pipeline from the air compressor 21 to the adsorption bed assembly 22 .

FIG. 3 also shows the gas flow in the gas flow pipeline 23 , where the solid arrows indicate the gas flow when the air compressor 21 directly injects the low-temperature air sucked into the sealed space 11 . At this time, the three-way valve connects the air flow pipeline from the air compressor 21 to the sealed space 11 , and closes the air flow pipeline from the air compressor 21 to the adsorption bed assembly 22 , so as to provide lower temperature air to the sealed space 11 .

FIG. 4 shows another working state of the nitrogen generating device shown in FIG. 3 . In this figure, the dotted arrows indicate the gas flow direction when the air compressor 21 and the adsorption bed assembly 22 supply nitrogen to the sealed space 11 . At this time, the three-way valve connects the air flow pipeline from the air compressor 21 to the adsorption bed assembly 22, closes the air flow pipeline from the air compressor 21 to the sealed space 11, and can provide higher temperature nitrogen to the sealed space 11.

Fig. 6 is a schematic block diagram of a refrigerating and freezing device 100 according to another embodiment of the present invention. The refrigeration and freezing equipment 100 of this embodiment may include: a sealed drawer 13 , a nitrogen generator 20 , a temperature sensor 30 , a state detection device 40 , a concentration sensor 50 and a temperature matching device 60 .

Wherein, the sealed drawer 13 is arranged inside the storage compartment 10 , and the sealed space 11 is defined by the sealed drawer 13 . In other alternative embodiments, a sealed box 12 is arranged inside the storage compartment 10 , and the sealed space 11 may be defined by the sealed box 12 .

The concentration sensor 50 may be configured to detect the nitrogen concentration of the sealed space 11 .

The nitrogen generating device 20 of this embodiment can also be configured to drive the switching mechanism 231 to connect the air compressor 21 to the airflow pipeline of the adsorption bed assembly 22 when the nitrogen concentration is lower than the preset concentration value, and to close the air compressor 21 to the sealing The air flow pipeline of the space 11; and control the air compressor 21 and the adsorption bed assembly 22 to work for a preset period of time to provide nitrogen to the sealed space 11, wherein the air compressor 21 runs at a preset second speed, and the second speed is greater than first speed. When the air compressor 21 runs at a higher second speed, it can provide compressed air to the adsorption bed assembly 22 after compressing the air to a high pressure. The selective adsorption of oxygen and nitrogen realizes the separation of nitrogen and oxygen in the air, thereby producing pure nitrogen, and transporting the nitrogen to the sealed space 11 through the gas flow pipeline.

When the refrigerating and freezing equipment leaves the factory, multiple tests can be carried out and the concentration that cannot meet the fresh-keeping requirements can be set as the preset concentration value according to the test results. The required time for increasing the freshness-keeping required concentration to meet the fresh-keeping required concentration is set, and after running for a corresponding time, the nitrogen concentration in the sealed space 11 can meet the food fresh-keeping requirement.

As shown in FIG. 2 , the refrigerating and freezing device 100 further includes a button 14 . The buttons 14 are arranged on the refrigerating and freezing equipment 100 and are configured to obtain user input operations to determine category information according to the input operations, wherein the buttons 14 are configured according to the category of food. The buttons 14 may be arranged on the outer surface of the door body of the refrigerating and freezing device 100, and the refrigerating and freezing device 100 may be provided with one or more buttons. Button 14 can be set according to the category of food, as seafood, meat, vegetables, fruit, poultry and eggs etc., and each button is according to different food category. The category of the food can be marked on the button by means of graphic text and the like.

The temperature matching device 60 can be configured to match the corresponding first temperature value in the preset temperature table according to the type information, and the temperature table stores the first temperature value and the second temperature value corresponding to different types of food obtained through testing in advance. Two temperature values, wherein the first temperature value is greater than the second temperature value. For example, suitable storage temperature ranges for different types of food can be set at the factory. For example, if the fish storage temperature is -5°C to 0°C, the corresponding first temperature value is 0°C, and the second temperature value is -5°C; the meat storage temperature is -10°C to -5°C, then the corresponding second temperature value is The first temperature value is -5°C, the second temperature value is -10°C; the storage temperature of vegetables is 5°C to 10°C, the corresponding first temperature value is 10°C, and the second temperature value is 5°C; If the temperature is 0°C to 5°C, the corresponding first temperature value is 5°C, and the second temperature value is 0°C; if the storage temperature of poultry eggs is -1.5°C to 1.5°C, the corresponding first temperature value is 1.5°C , the second temperature value is -1.5°C. The suitable storage temperature for each type of food can be ranged based on food tests, so as to ensure that the food is of high quality within the storage temperature range. The above-mentioned specific numerical values are for illustration only, and are not intended to limit the present invention.

The temperature matching device 60 may also be configured to obtain a corresponding second temperature value by matching in a preset temperature table according to category information. The nitrogen generating device 20 may also be configured to control the air compressor 21 to stop running when the actual temperature of the sealed space 11 is less than or equal to the second temperature value. For example, if the storage temperature of fruits is 0°C to 5°C, the corresponding first temperature value is 5°C, and the second temperature value is 0°C. In the case that the actual temperature of the sealed space 11 is less than or equal to the second temperature value of 0°C , control the air compressor 21 to stop running, so that the temperature in the sealed space 11 will not be lower than the suitable storage temperature of the fruit food, so as to ensure the storage effect of the food.

In the refrigerating and freezing equipment 100 of this embodiment, the communication relationship between the air compressor 21, the adsorption bed assembly 22 and the sealed space 11 is switched by the switching mechanism 231, the air flow pipeline from the air compressor 21 to the sealed space 11 is connected, and the air compressor 21 is turned off. The airflow pipeline to the adsorption bed assembly 22 can provide air at a lower temperature to the sealed space 11; the airflow pipeline connecting the air compressor 21 to the adsorption bed assembly 22 closes the airflow pipeline from the air compressor 21 to the sealed space 11 , nitrogen at a higher temperature can be provided to the sealed space 11, and the nitrogen concentration and temperature can be adjusted accurately according to the actual situation of the sealed space 11, so that both the nitrogen concentration and the temperature in the sealed space 11 can meet the freshness requirements of food.

Further, the refrigerating and freezing equipment 100 of this embodiment is preset with different suitable storage temperature ranges for different types of food, by controlling the operating speed of the air compressor 21, and switching the air compressor 21 and the adsorption bed assembly 22 1. The communication relationship between the sealed spaces 11, precisely adjusting the temperature in the sealed space 11, so that the temperature in the sealed space 11 is in the suitable storage temperature range of food, ensuring the storage effect of food, and improving the user experience.

The present invention also provides a temperature control method for a refrigerating and freezing device. FIG. 7 is a schematic diagram of a temperature controlling method for a refrigerating and freezing device according to an embodiment of the present invention. The temperature control method can be implemented by using the refrigerating and freezing equipment 100 of any one of the above-mentioned embodiments. As shown in Figure 7, the temperature control method for refrigerating and freezing equipment performs the following steps in sequence:

Step S702, detecting the actual temperature of the sealed space 11;

Step S704, judging whether the actual temperature is greater than or equal to the preset first temperature value, if yes, execute step S706, if not, return to execute step S702;

Step S706, detect whether the air compressor 21 is in working state, if yes, return to step S702, if not, execute step S708;

Step S708, driving the switching mechanism 231 to connect the air flow pipeline from the air compressor 21 to the sealed space 11, and closing the air flow pipeline from the air compressor 21 to the adsorption bed assembly 22;

Step S710 , controlling the air compressor 21 to run at a preset first rotational speed, so as to inject the sucked low-temperature air into the sealed space 11 to reduce the temperature of the sealed space 11 .

In the above steps, the preset first temperature value in step S704 is related to the category of the food. Since the suitable storage temperature for different categories of food is different, it can be preset according to the category of the food. The category of the food can be obtained through the buttons provided on the refrigerating and freezing equipment, and the category of the food can also be obtained through the user's touch operation by using the display device provided on the refrigerating and freezing equipment.

In step S706, it is detected whether the air compressor 21 is in the working state. If the air compressor 21 is not in the working state, by discharging cold air with a lower temperature into the sealed space 11 to adjust the temperature, it is possible to avoid affecting the normal operation of the air compressor 21. Nitrogen production work ensures that the nitrogen concentration in the sealed space 11 meets the requirements. Moreover, the process of nitrogen production can perform the following steps in sequence: detect the nitrogen concentration in the sealed space 11; determine whether the nitrogen concentration is lower than the preset concentration value; if so, drive the switching mechanism 231 to connect the air compressor 21 to the airflow pipeline of the adsorption bed assembly 22 , close the air flow pipeline from air compressor 21 to sealed space 11; running at a rotational speed, and the second rotational speed is greater than the first rotational speed.

The switching mechanism 231 in step S708 can be a three-way valve to connect the air flow pipeline from the air compressor 21 to the sealed space 11, and close the air flow pipeline from the air compressor 21 to the adsorption bed assembly 22, so as to provide the sealed space 11 with a lower temperature. air; connect the air compressor 21 to the airflow pipeline of the adsorption bed assembly 22, close the airflow pipeline from the air compressor 21 to the sealed space 11, and provide higher temperature nitrogen to the sealed space 11. The use of the three-way valve above is only an optional implementation of switching the communication relationship between the air compressor 21, the adsorption bed assembly 22, and the sealed space 11. In some other embodiments, it can be realized through other pipelines and valve structures. Switching of the refrigerant direction. For example, the switching mechanism 231 may be two electromagnetic valves, which are respectively arranged on the airflow pipeline from the air compressor 21 to the sealed space 11 and on the airflow pipeline from the air compressor 21 to the adsorption bed assembly 22 .

The preset first rotational speed value in step S710 is low, and the air compressor 21 operates at a low rotational speed, which can ensure that it sucks cold air with a pressure close to normal pressure, and avoids heating up the low-temperature air during the compression process. In addition, the suction port of the air compressor 21 can be set near the evaporator of the refrigerating and freezing equipment 100 to suck in air with a lower temperature and discharge it directly into the sealed space 11 to effectively reduce the temperature in the sealed space 11 .

The temperature control method for refrigeration and freezing equipment in this embodiment can accurately adjust the nitrogen concentration and temperature respectively according to the actual situation of the sealed space 11, so that the nitrogen concentration and temperature in the sealed space 11 can meet the freshness requirements of food .

Fig. 8 is a detailed flowchart of a temperature control method for a refrigerating and freezing device according to an embodiment of the present invention. The control method performs the following steps in sequence:

Step S802, detecting the actual temperature of the sealed space 11;

Step S804, using the keys 14 provided on the refrigerating and freezing equipment to obtain the user's input operation, so as to determine the category information of the food in the sealed space 11 according to the input operation;

Step S806, matching in the preset temperature table according to the category information to obtain the corresponding first temperature value and second temperature value;

Step S808, judging whether the actual temperature is greater than or equal to the preset first temperature value, if yes, execute step S810, if not, return to execute step S802;

Step S810, detecting whether the air compressor 21 is in the working state, if so, return to step S802, if not, execute step S812;

Step S812, driving the switching mechanism 231 to connect the air flow pipeline from the air compressor 21 to the sealed space 11, and closing the air flow pipeline from the air compressor 21 to the adsorption bed assembly 22;

Step S814, controlling the air compressor 21 to run at a preset first rotational speed, so as to inject the sucked low-temperature air into the sealed space 11 to reduce the temperature of the sealed space 11;

Step S816, judging whether the actual temperature of the sealed space 11 is less than or equal to the preset second temperature value, if yes, execute step S818, if not, return to execute step S814;

Step S818, controlling the air compressor 21 to stop running.

The key 14 in step S804 may be set on the outer surface of the door body of the refrigerating and freezing device, and the refrigerating and freezing device may be provided with one or more keys. Button 14 can be set according to the category of food, as seafood, meat, vegetables, fruit, poultry and eggs etc., and each button is according to different food category. The category of the food can be marked on the button by means of graphic text and the like.

The temperature table preset in step S806 stores the first temperature value and the second temperature value corresponding to different types of food obtained through testing in advance, wherein the first temperature value is greater than the second temperature value. For example, suitable storage temperature ranges for different types of food can be set at the factory. For example, the storage temperature of fish is -5°C to 0°C, the corresponding first temperature value is 0°C, and the second temperature value is -5°C; the storage temperature of vegetables is 5°C to 10°C, then the corresponding first temperature value is The value is 10°C and the second temperature value is 5°C. The suitable storage temperature for each type of food can be ranged based on food tests, so as to ensure that the food is of high quality within the storage temperature range. The above-mentioned specific numerical values are for illustration only, and are not intended to limit the present invention.

Step S814, when the actual temperature is greater than or equal to the preset first temperature value and the air compressor 21 is not in operation, control the air compressor 21 to run at the preset first rotational speed, so as to inject the sucked low-temperature air into the seal Space 11, reduce the temperature of the sealed space 11; step S818, when the actual temperature is less than or equal to the preset first temperature value, control the air compressor 21 to stop running, which can ensure that the temperature in the sealed space 11 is suitable for food storage The temperature range can improve the storage effect of food.

In the temperature control method for refrigeration and freezing equipment in this embodiment, different suitable storage temperature ranges are preset for different types of food, by controlling the operating speed of the air compressor 21, and switching the air compressor 21, adsorption bed The communication relationship between the component 22 and the sealed space 11 precisely adjusts the temperature in the sealed space 11, so that the temperature in the sealed space 11 is in the suitable storage temperature range of food, ensures the storage effect of food, and improves the user experience.

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. a kind of temperature-controlled process for refrigerating equipment, wherein chamber interior sets between the storing of the refrigerating equipment Sealing space is equipped with, the refrigerating equipment is provided with for the air compressor of nitrogen being provided to the sealing space, being inhaled Attached bed component and the airflow pipeline with switching mechanism, and the temperature-controlled process includes：

Detect the actual temperature of the sealing space；

Judge the actual temperature whether more than or equal to default first temperature value；

If so, detect whether the air compressor is in running order, and when result is no, orders about the switching mechanism and connect The airflow pipeline of the logical air compressor to the sealing space, closes the air compressor to the adsorbent bed component Airflow pipeline；And

Control the air compressor and run with default first rotating speed, the Cryogenic air injection sealing drawn is empty Between, reduce the temperature of the sealing space.

2. method according to claim 1, wherein also wrapping before the step of detecting the actual temperature of the sealing space Include：

Detect the nitrogen gas concn of the sealing space；

Judge the nitrogen gas concn whether less than the default density；

If so, the airflow pipeline that the switching mechanism connects the air compressor to the adsorbent bed component is ordered about, institute is closed State the airflow pipeline of air compressor to the sealing space；And

The air compressor and the adsorbent bed component operation preset duration are controlled, to provide nitrogen to the sealing space, Wherein described air compressor is run with default second rotating speed, and second rotating speed is more than first rotating speed.

3. method according to claim 1, wherein judging whether the actual temperature is warm more than or equal to default first The step of angle value, includes：

Obtain the classification information of food in the sealing space；

Matched in default thermometer according to the classification information and draw corresponding first temperature value, preserved in the thermometer There is different classes of corresponding first temperature value of food and second temperature value drawn beforehand through test, wherein described first is warm Angle value is more than the second temperature value.

4. method according to claim 3, wherein the step of obtaining the classification information of food in the sealing space includes：

The input operation of user is obtained using the button being arranged on the refrigerating equipment, with true according to the input operation The fixed classification information, wherein the button is configured according to the classification of food, and the refrigerating equipment is provided with One or more described buttons.

5. method according to claim 3, wherein controlling what the air compressor was run with default first rotating speed Also include after step：

Matched in default thermometer according to the classification information and draw corresponding second temperature value；

Judge the actual temperature of the sealing space whether less than or equal to the second temperature value；And

If so, the air compressor is controlled out of service.

6. a kind of refrigerating equipment, with storing compartment, the storing compartment is internally provided with sealing space, and described cold Hiding freezing equipment also includes：

Nitrogen-making device, is configured to provide nitrogen to the sealing space；

Temperature sensor, is configured to detect the actual temperature of the sealing space；

Condition checkout gear, is configured to detect whether the air compressor is in running order；And

The nitrogen-making device includes air compressor, adsorbent bed component and the airflow pipeline with switching mechanism, the nitrogen dress processed Put and be configured to：It is more than or equal to default first temperature value in the actual temperature, the air compressor is not at work In the case of state, the airflow pipeline that the switching mechanism connects the air compressor to the sealing space is ordered about, closed The airflow pipeline of the air compressor to the adsorbent bed component；And the air compressor is controlled with default first turn Speed operation, by the Cryogenic air drawn the sealing space is injected, and reduces the temperature of the sealing space.

7. refrigerating equipment according to claim 6, also includes：

Concentration sensor, is configured to detect the nitrogen gas concn of the sealing space；And

The nitrogen-making device is configured to：In the case where the nitrogen gas concn is less than the default density, the switching machine is ordered about Structure connects the airflow pipeline of the air compressor to the adsorbent bed component, closes the air compressor empty to the sealing Between airflow pipeline；And the air compressor and the adsorbent bed component operation preset duration are controlled, with to the sealing Space provides nitrogen, wherein the air compressor is run with default second rotating speed, and second rotating speed is more than described First rotating speed.

8. refrigerating equipment according to claim 6, also includes：

Button, is arranged on the refrigerating equipment, is configured to obtain the input operation of user, with according to the input operation Determine the classification information, wherein the button is configured according to the classification of food, and the refrigerating equipment is arranged There are one or more described buttons；

Temperature Matching device, is configured to be matched in default thermometer according to the classification information and draws corresponding first temperature Value, preserves warm beforehand through different classes of corresponding first temperature value of food that draws of test and second in the thermometer Angle value, wherein first temperature value is more than the second temperature value.

9. refrigerating equipment according to claim 8, wherein,

The Temperature Matching device is configured to：Matched in default thermometer according to the classification information and draw corresponding Two temperature values；

The nitrogen-making device is configured to：The feelings of the second temperature value are less than or equal in the actual temperature of the sealing space Under condition, the air compressor is controlled out of service.

10. refrigerating equipment according to claim 6, also includes：

Sealed drawer, is arranged at chamber interior between the storing, and by the sealed drawer sealing space is limited.