Refrigerating system and refrigerating adjusting method

Abstract

The invention provides a refrigeration system and a refrigeration adjusting method, and the system comprises a first function part which provides a refrigeration function; the second functional part is matched with the first functional part to provide a frosting inhibiting function; the first function part comprises a compressor, a condensation assembly, a throttling valve and an evaporation assembly which are sequentially connected, the condensation assembly comprises a condenser, and the evaporation assembly comprises an evaporator; the second function part comprises an on-off control valve and a pressure regulating valve, an inlet of the on-off control valve is connected between an outlet of the compressor and an inlet of the condenser, an outlet of the on-off control valve is connected with an inlet of the pressure regulating valve, and an outlet of the pressure regulating valve is connected between an outlet of the throttling valve and an inlet of the evaporator; and when the evaporator has the frosting restraining requirement, the on-off control valve is controlled to be opened, and the opening degree of the pressure adjusting valve is adjusted so that the evaporation pressure of an outlet of the evaporator can be adjusted to the first preset pressure. By additionally arranging the bypass pipeline and the bypass valve controlled by pressure, the evaporation pressure of the refrigerating system is adjusted, and frosting can be stably restrained.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a refrigeration system and a refrigeration adjustment method. Background Art

[0002] At present, in the existing system, the refrigeration system usually includes a compressor, a condenser, a throttling device and an evaporator, and the refrigeration of the controlled environment is achieved through the circulation of the refrigerant.

[0003] In the process of implementing this application, the inventors found that there are at least the following problems in the prior art:

[0004] For refrigeration systems with a cooling temperature of 0 to 10°C, the evaporator coil is prone to frost because the evaporator temperature is lower than 0°C, which will lead to poor cooling effect, increased energy consumption and reduced system reliability. Summary of the invention

[0005] The present application provides a refrigeration system and a refrigeration regulation method, which can improve the problems existing in the prior art that the evaporating coil is easy to frost, resulting in poor refrigeration effect, increased energy consumption and reduced system reliability.

[0006] In a first aspect, the present application provides a refrigeration system, which includes: a first functional part for providing a refrigeration function; a second functional part for cooperating with the first functional part to provide a frost suppression function; the first functional part includes a compressor, a condensing component, a throttle valve, and an evaporating component which are connected in sequence to form a circulation loop, the condensing component includes a condenser, and the evaporating component includes an evaporator; the second functional part includes an on-off control valve and a pressure regulating valve, the inlet of the on-off control valve is connected between the outlet of the compressor and the inlet of the condenser, the outlet of the on-off control valve is connected to the inlet of the pressure regulating valve, and the outlet of the pressure regulating valve is connected between the outlet of the throttle valve and the inlet of the evaporator; when it is determined that the evaporator has a demand for suppressing frost, the on-off control valve is controlled to open, and the opening of the pressure regulating valve is adjusted to adjust the evaporation pressure at the outlet of the evaporator to a first preset pressure.

[0007] In one possible implementation, determining that the evaporator has a need to suppress frost includes: obtaining a first temperature of the evaporator surface provided by an external device, and when it is determined that the first temperature is less than the frosting temperature, determining that the evaporator has a need to suppress frost; or obtaining an evaporation pressure of the evaporator outlet provided by an external device, and when it is determined that the evaporation pressure is inconsistent with the first preset pressure, determining that the evaporator has a need to suppress frost.

[0008] In one possible implementation, adjusting the opening of the pressure regulating valve to adjust the evaporation pressure at the evaporator outlet to a first preset pressure includes: obtaining the evaporation pressure of the evaporator outlet provided by an external device; if the evaporation pressure is less than the first preset pressure, increasing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet is increased to the first preset pressure; if the evaporation pressure is greater than the first preset pressure, reducing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet is reduced to the first preset pressure.

[0009] In a possible implementation, when it is determined that the evaporator has a dehumidification demand, the on-off control valve is controlled to open, and the opening of the pressure regulating valve is adjusted to adjust the evaporation pressure at the evaporator outlet to a second preset pressure.

[0010] In one possible implementation, adjusting the opening of the pressure regulating valve to adjust the evaporation pressure at the evaporator outlet to a second preset pressure includes: obtaining the evaporation pressure of the evaporator outlet provided by an external device; if the evaporation pressure is less than the second preset pressure, increasing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet is increased to the second preset pressure; if the evaporation pressure is greater than the second preset pressure, reducing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet is reduced to the second preset pressure.

[0011] In a possible implementation, when it is determined that the evaporator has a dehumidification demand and a frost suppression demand, the on-off control valve is controlled to open, and the opening of the pressure regulating valve is adjusted to control the evaporation pressure at the evaporator outlet to be within a preset pressure range.

[0012] In one possible implementation, adjusting the opening of the pressure regulating valve to control the evaporation pressure at the evaporator outlet to be within a preset pressure range includes: obtaining the evaporation pressure at the evaporator outlet provided by an external device; if the evaporation pressure is less than the minimum value of the preset pressure range, increasing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet is within the preset pressure range; if the evaporation pressure is greater than the maximum value of the preset pressure range, reducing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet is within the preset pressure range.

[0013] In a possible implementation, the refrigeration system also includes a third functional part; the third functional part includes a first temperature sensor and a pressure sensor, the first temperature sensor is arranged adjacent to the evaporator, and is used to detect a first temperature of the evaporator surface, and the pressure sensor is arranged at the outlet position of the evaporator, and is used to detect the evaporation pressure at the outlet of the evaporator.

[0014] In a possible implementation, the third functional part further includes: a second temperature sensor, which is arranged at the air inlet of the evaporator and is used to detect the return air temperature of the evaporator; wherein, in the process of adjusting the opening of the pressure regulating valve to suppress frosting, after the evaporation pressure at the outlet of the evaporator is adjusted to the first preset pressure, if it is determined that the return air temperature exceeds the working range of suppressing frosting, the on-off control valve and the pressure regulating valve are closed to end the frost suppression process;

[0015] During the dehumidification process by adjusting the opening of the pressure regulating valve, after the evaporation pressure at the evaporator outlet is adjusted to the second preset pressure, if it is determined that the return air temperature exceeds the dehumidification working range, the on-off control valve and the pressure regulating valve are closed to end the dehumidification process.

[0016] In a possible implementation, the third functional part also includes: a frost suppression indicator light, which is used to light up when it is determined that the evaporator has a frost suppression requirement, and go out after it is determined that the frost suppression process is finished; a dehumidification indicator light, which is used to light up when it is determined that the evaporator has a dehumidification requirement, and go out after it is determined that the dehumidification process is finished.

[0017] In a second aspect, the present application also provides a refrigeration regulation method, which is applied to a refrigeration system, and the method includes: when it is determined that the evaporator of the refrigeration system has a demand for suppressing frost, controlling the on-off control valve of the refrigeration system to open, and adjusting the opening of the pressure regulating valve of the refrigeration system to adjust the evaporation pressure at the evaporator outlet to a first preset pressure; wherein, after the on-off control valve is opened and the opening of the pressure regulating valve of the refrigeration system is adjusted, the compressor of the refrigeration system is controlled to output part of the refrigerant to the evaporator to suppress frost on the evaporator.

[0018] In a possible implementation, the method further includes: when it is determined that the evaporator has a dehumidification demand, controlling the on-off control valve to open, and adjusting the opening of the pressure regulating valve to adjust the evaporation pressure at the evaporator outlet to a second preset pressure.

[0019] Compared with the prior art, the technical solution provided by this application has at least the following beneficial effects:

[0020] Through the above technical solution, a bypass line and a bypass valve controlled by pressure are added on the basis of the original first functional part of the refrigeration system, which can be specifically the second functional part. The second functional part includes an on-off control valve and a pressure regulating valve. The inlet of the on-off control valve is connected between the outlet of the compressor and the inlet of the condenser, and the outlet of the on-off control valve is connected to the inlet of the pressure regulating valve. The outlet of the pressure regulating valve is connected between the outlet of the throttle valve and the inlet of the evaporator. When it is determined that the evaporator has a demand for suppressing frosting, the on-off control valve is controlled to open, and the opening of the pressure regulating valve is adjusted to control the evaporation pressure at the outlet of the evaporator to be within the first pressure range. Through this solution, the gaseous refrigerant added to the evaporator carries heat, which can stably suppress the reduction of the superheat at the outlet of the evaporator, so the trend of reducing the opening of the throttle valve can also be alleviated. After the frost layer on the surface of the evaporator grows to a certain extent, the surface temperature of the frost layer approaches the air dew point and no condensation water is generated, and the frost layer stops growing.

[0021] In summary, the refrigeration system provided in the present application can stably suppress frosting of the evaporator, thereby improving the problems existing in the prior art that the evaporator coil is easily frosted, resulting in poor refrigeration effect, increased energy consumption, and reduced system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A schematic diagram of a frosting suppression scenario process provided by an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a refrigeration system provided in one embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of a refrigeration system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] Figure 1 A schematic diagram of a frosting suppression scenario process provided for an embodiment of the present application.

[0028] Reference Figure 1 As shown in the figure, during the operation of the refrigeration system, the refrigerant evaporates in the evaporator and absorbs the surrounding heat to achieve the cooling effect. However, during the operation of the evaporator evaporating and absorbing heat, when the surface temperature of the evaporator is lower than the air dew point temperature, condensation will occur on the evaporator surface. Since the surface temperature of the evaporator is low, usually below 0°C, when the evaporation temperature is low, frost will appear on the evaporator surface. If the frost on the evaporator surface is too thick, it will produce a large thermal resistance, affect the heat exchange efficiency of the refrigeration system, cause the refrigeration capacity to decrease, lead to energy consumption of the refrigeration system, reduce the refrigeration reliability of the refrigeration system, and affect the user experience.

[0029] Generally, when the problem of frosting on the evaporator surface occurs, it is necessary to suppress the frost on the evaporator through a corresponding frosting suppression strategy, so as to solve the technical problems caused by the frosting.

[0030] The embodiment of the present application provides a refrigeration system, in which a bypass line and a pressure-controlled bypass valve are added to the refrigeration system to adjust the evaporation pressure of the refrigeration system so that the system can stably dehumidify or inhibit frosting. It is understandable that the refrigeration system can be applied to refrigerated trucks, refrigerators, cold storages, artificial environment test rooms / operating rooms, etc.

[0031] The refrigeration system and the frosting suppression strategy of the refrigeration system provided by the present application are described in detail below in conjunction with the accompanying drawings.

[0032] Figure 2 A schematic diagram of the structure of a refrigeration system provided in one embodiment of the present application.

[0033] Reference Figure 2 As shown, the system may include:

[0034] The first functional part D1 is used to provide a cooling function.

[0035] The second functional part D2 is used to cooperate with the first functional part D1 to provide a frost suppression function.

[0036] The first functional part D1 may include a compressor 100, a condensing assembly 200, a throttle valve 300 and an evaporating assembly 400 which are sequentially connected to form a circulation loop. Figure 2 As shown, the compressor 100, the condensing assembly 200, the throttle valve 300 and the evaporating assembly 400 connected in sequence can be connected to form a refrigeration cycle.

[0037] In some embodiments, the condensing assembly 200 may include a condenser 201, and the evaporating assembly 400 may include an evaporator 401. It is understood that the compressor 100, the condenser 201, the throttle valve 300, and the evaporator 401 are sequentially connected to form a circulation loop.

[0038] In some embodiments, the refrigeration cycle process of the first functional part D1 may include the compressor 100 compressing the refrigerant, the compressed refrigerant entering the condenser 201 for condensation and heat dissipation, the condensed refrigerant passing through the throttle valve 300 and entering the evaporator for evaporation and heat absorption, and the refrigerant after evaporation and heat absorption returns to the compressor 100, completing a refrigeration cycle. Exemplarily, the low-temperature and low-pressure refrigerant vapor is compressed into high-temperature and high-pressure refrigerant vapor by the compressor 100, then enters the condenser 201 and exchanges heat with the air of the external environment in the condenser, condenses into high-pressure refrigerant liquid, and then passes through the throttle valve 300 for throttling and pressure reduction, enters the evaporator 401 to absorb heat and refrigerate, evaporates into low-temperature and low-pressure refrigerant vapor and returns to the compressor 100, completing a refrigeration cycle.

[0039] Reference Figure 1 As shown, the second functional part D2 includes an on-off control valve 500 and a pressure regulating valve 600. The inlet of the on-off control valve 500 is connected between the outlet of the compressor 100 and the inlet of the condenser 201, the outlet of the on-off control valve 500 can be connected to the inlet of the pressure regulating valve 600, and the outlet of the pressure regulating valve 600 is connected between the outlet of the throttle valve and the inlet of the evaporator 401. Exemplarily, the on-off control valve 500 can be a solenoid valve, which can effectively control the on-off of the bypass path, that is, by controlling the opening or closing of the solenoid valve, it can control whether the refrigerant discharged from the compressor 100 is passed to the pressure regulating valve 600.

[0040] During the continuous cooling process of the refrigeration system, when the surface temperature of the evaporator 401 is lower than the dew point temperature of the air flowing through the surface of the evaporator 401, condensed water will continue to condense on the surface of the evaporator 401. The presence of condensed water increases the local heat exchange thermal resistance of the evaporator 401, while increasing the air flow resistance and reducing the air volume, making the heat exchange of the evaporator 401 worse, and the refrigerant superheat at the outlet of the evaporator 401 lower. In some application scenarios, the opening of the throttle valve 300 of the refrigeration system is controlled by the superheat of the refrigerant at the outlet of the evaporator 401. When the superheat is low, the opening of the throttle valve 300 is automatically reduced, reducing the refrigerant flow rate, but the speed of the compressor 100 remains unchanged, resulting in a decrease in the evaporation pressure due to the unchanged suction volume and the mismatch between the suction volume and the cooling volume.

[0041] When the evaporation pressure drops to a certain level, the surface temperature of the evaporator 401 is lower than a certain temperature (for example, 0°C), and the condensed water droplets / water film will release heat and freeze into frost. The surface of the frost will continue to produce condensed water, so the following cycle phenomenon will appear on the surface of the evaporator 401: "Condensed water → poor heat exchange → low superheat → reduced throttle valve opening → reduced evaporation pressure → condensed water freezes into frost → new condensed water", resulting in a thicker and thicker circulating frost layer, which in turn affects the refrigeration effect of the refrigeration system.

[0042] In some embodiments, during the operation of the refrigeration system, it can be determined whether the evaporator 401 has a frost suppression requirement. If so, a frost suppression strategy can be executed based on the second functional part D2.

[0043] Regarding the timing of testing the need to suppress frost

[0044] In some embodiments, the refrigeration system can determine whether the evaporator 401 has a need to suppress frost by periodic detection. Specifically, after the refrigeration system starts to run, it can determine whether the evaporator 401 has a need to suppress frost every first time period, wherein the first time period can be customized based on user needs or actual application scenarios of the refrigeration system. By periodically determining whether the evaporator 401 has a need to suppress frost, the load power of the refrigeration system can be reduced and electricity can be saved.

[0045] In another embodiment, the refrigeration system can also determine whether the evaporator 401 has a demand for suppressing frost by real-time monitoring, thereby improving the response efficiency of suppressing frost and achieving rapid suppression of frost.

[0046] In other embodiments, the refrigeration system can also determine whether the evaporator 401 has the need to suppress frost by other means. For example, the user sets the detection of whether the evaporator 401 has the need to suppress frost at the corresponding time based on the historical frost time. The present application does not limit the method of determining whether the evaporator 401 has the need to suppress frost.

[0047] About the detection method of frost suppression demand

[0048] (I) Based on temperature detection

[0049] In some embodiments, the refrigeration system may determine whether the evaporator 401 has a need to suppress frost based on the surface temperature of the evaporator 401. In one embodiment, the refrigeration system may obtain a first temperature on the surface of the evaporator 401, and compare the first temperature with the frost temperature, and when the first temperature is lower than the frost temperature, it is determined that the evaporator 401 has a need to suppress frost.

[0050] In some embodiments, the refrigeration system can obtain the first temperature of the evaporator 401 through an external device, thereby simplifying the structure of the refrigeration system and reducing the cost of the refrigeration system.

[0051] In some embodiments, the frosting temperature used to determine whether the evaporator 401 has a demand for suppressing frosting may be a dynamic value. Specifically, the frosting temperature may be dynamically adjusted based on the refrigeration temperature of the evaporator 401 and changes in the ambient humidity near the evaporator 401 .

[0052] (II) Based on evaporation pressure detection

[0053] In some embodiments, the refrigeration system may determine whether the evaporator 401 has a need to suppress frost based on the evaporation pressure at the outlet of the evaporator 401. In one embodiment, the refrigeration system may obtain the evaporation pressure p0 at the outlet of the evaporator, and compare the evaporation pressure p0 with the first preset pressure p1. When the evaporation pressure p0 is inconsistent with the first preset pressure p1 (i.e., p0<p1 or p0>p1), it is determined that the evaporator 401 has a need to suppress frost.

[0054] In some embodiments, the refrigeration system can obtain the evaporation pressure p0 of the evaporator 401 through an external device, thereby simplifying the structure of the refrigeration system and reducing the cost of the refrigeration system.

[0055] In some embodiments, when it is determined that the evaporator 401 has a need to suppress frost, the frost suppression strategy can be implemented to suppress frost on the evaporator 401. Specifically, in one embodiment, the frost suppression strategy can include controlling the on-off control valve 500 to open, and adjusting the opening of the pressure regulating valve 600, so as to control the evaporation pressure at the outlet of the evaporator 401 to be adjusted to the first preset pressure p1. That is, when it is determined that the evaporator 401 has a need to suppress frost, the on-off control valve 500 is controlled to open, and the opening of the pressure regulating valve 600 is adjusted to adjust the evaporation pressure at the outlet of the evaporator 401 to the first preset pressure p1.

[0056] In some embodiments, determining that the evaporator 401 has a need to suppress frost formation includes:

[0057] Acquire a first temperature of the surface of the evaporator 401 provided by an external device, and when it is determined that the first temperature is less than the frosting temperature, determine that the evaporator 401 has a requirement to suppress frosting; or

[0058] The evaporation pressure p0 at the outlet of the evaporator 401 provided by an external device is obtained. When it is determined that the evaporation pressure p0 is inconsistent with the first preset pressure p1, it is determined that the evaporator 401 has a requirement for suppressing frost.

[0059] In some embodiments, the opening of the pressure regulating valve 600 is adjusted to control the evaporation pressure at the outlet of the evaporator 401 to be within a first pressure range, that is, the opening of the pressure regulating valve 600 is adjusted to adjust the evaporation pressure at the outlet of the evaporator 401 to a first preset pressure p1, including: obtaining the evaporation pressure P0 at the outlet of the evaporator 401 provided by an external device; if the evaporation pressure P0 is less than the first preset pressure p1 (that is, P0<p1), increasing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is increased to the first preset pressure; if the evaporation pressure p0 is greater than the first preset pressure (that is, P0>p1), reducing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is reduced to the first preset pressure. Through the above-mentioned adjustment method, on the one hand, a part of the gaseous refrigerant can be supplemented to the evaporator, which can balance the flow mismatch problem between the throttle valve 300 and the compressor 100; on the other hand, the heat carried by the supplementary gaseous refrigerant can be used to suppress the reduction of the superheat at the outlet of the evaporator 401, so that the trend of reducing the opening of the throttle valve 300 can also be alleviated.

[0060] In some embodiments, during the operation of the refrigeration system, it can be determined whether the evaporator 401 has a dehumidification demand. If so, a dehumidification strategy can be executed based on the second functional part D2.

[0061] In some embodiments, when it is determined that the evaporator 401 has a dehumidification demand, the on-off control valve 500 is controlled to open, and the opening of the pressure regulating valve 600 is adjusted to adjust the evaporation pressure p0 at the outlet of the evaporator 401 to a second preset pressure p2 (P1>p2).

[0062] In some embodiments, adjusting the opening of the pressure regulating valve 600 to adjust the evaporation pressure p0 at the outlet of the evaporator 401 to a second preset pressure p2 includes: obtaining the evaporation pressure p0 at the outlet of the evaporator 401 provided by an external device; if the evaporation pressure p0 is less than the second preset pressure p2, increasing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is increased to the second preset pressure; if the evaporation pressure p0 is greater than the second preset pressure p2, reducing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is reduced to the second preset pressure.

[0063] In some embodiments, during the operation of the refrigeration system, it can be determined whether the evaporator 401 has a dehumidification demand and a frost suppression demand. If so, a strategy of suppressing frost and dehumidifying can be executed based on the second functional part D2.

[0064] In some embodiments, when it is determined that the evaporator 401 has a dehumidification demand and a frost suppression demand, the on-off control valve 500 is controlled to open, and the opening of the pressure regulating valve 600 is adjusted to control the evaporation pressure at the outlet of the evaporator 401 to be within a preset pressure range.

[0065] In some embodiments, adjusting the opening of the pressure regulating valve 600 to control the evaporation pressure at the outlet of the evaporator 401 to be within a preset pressure range includes: obtaining the evaporation pressure at the outlet of the evaporator 401 provided by an external device; if the evaporation pressure is less than the minimum value of the preset pressure range, increasing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is within the preset pressure range; if the evaporation pressure is greater than the maximum value of the preset pressure range, reducing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is within the preset pressure range.

[0066] In some embodiments, the preset pressure range may be [P1, P2], that is, the preset pressure range may be a range between a first preset pressure and a second preset pressure. When it is determined that the evaporator 401 has a dehumidification demand and a frost suppression demand, the evaporation pressure P0 at the outlet of the evaporator 401 is obtained; if the evaporation pressure is less than the minimum value of the preset pressure range, that is, P0<P1, the opening of the pressure regulating valve 600 is increased until the evaporation pressure at the outlet of the evaporator 401 is within the preset pressure range [P1, P2]; if the evaporation pressure P0 is greater than the maximum value of the preset pressure range, that is, P0>P2, the opening of the pressure regulating valve 600 is reduced until the evaporation pressure at the outlet of the evaporator 401 is within the preset pressure range [P1, P2].

[0067] Figure 3 A schematic diagram of the structure of a refrigeration system provided in one embodiment of the present application.

[0068] Reference Figure 3 As shown, the refrigeration system may further include a third functional part, which may include a pressure sensor 700 and / or a first temperature sensor 800. The pressure sensor 700 may be arranged at the outlet of the evaporator 401 to detect the evaporation pressure at the outlet of the evaporator 401. The first temperature sensor 800 is arranged adjacent to the evaporator 401 to detect the first temperature on the surface of the evaporator 401.

[0069] In some embodiments, when the third functional part only includes the first temperature sensor 800, it can be determined whether the evaporator 401 has a need to suppress frost based on the first temperature of the surface of the evaporator 401 provided by the first temperature sensor 800, wherein when it is determined that the first temperature is lower than the frosting temperature, it is determined that the evaporator 401 has a need to suppress frost, and conversely, when it is determined that the first temperature is not lower than the frosting temperature, it is determined that the evaporator 401 does not have a need to suppress frost.

[0070] In some embodiments, when the third functional part only includes the first temperature sensor 800, when executing the frosting suppression strategy, the evaporation pressure at the outlet of the evaporator 401 provided by the external device can be obtained. When it is determined that the evaporator 401 has a frosting suppression requirement, the on-off control valve 500 is controlled to open, and the opening of the pressure regulating valve 600 is adjusted, so as to control the evaporation pressure at the outlet of the evaporator 401 to be adjusted to the first preset pressure. The specific adjustment method of the pressure regulating valve 600 may include: obtaining the evaporation pressure P0 at the outlet of the evaporator 401 provided by the external device; if the evaporation pressure P0 is less than the first preset pressure p1 (i.e., P0<p1), increasing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is increased to the first preset pressure; if the evaporation pressure p0 is greater than the first preset pressure (i.e., P0>p1), reducing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is reduced to the first pressure.

[0071] In some embodiments, when the third functional part only includes the pressure sensor 700, it can be determined whether the evaporator 401 has a need to suppress frost based on the evaporation pressure at the outlet of the evaporator 401 provided by the pressure sensor 700, wherein when it is determined that the evaporation pressure is inconsistent with the first preset pressure, it is determined that the evaporator 401 has a need to suppress frost, and conversely, when it is determined that the evaporation pressure is consistent with the first preset pressure, it is determined that the evaporator 401 does not have a need to suppress frost.

[0072] In some embodiments, when the third functional part only includes the pressure sensor 700, when executing the frosting suppression strategy, the evaporation pressure at the outlet of the evaporator provided by the pressure sensor 700 can be obtained. When it is determined that the evaporator 401 has a frosting suppression requirement, the on-off control valve 500 is controlled to open, and the opening of the pressure regulating valve 600 is adjusted, so as to control the evaporation pressure at the outlet of the evaporator 401 to be adjusted to the first preset pressure. The specific adjustment method of the pressure regulating valve 600 may include: obtaining the evaporation pressure P0 at the outlet of the evaporator 401 provided by the pressure sensor 700; if the evaporation pressure P0 is less than the first preset pressure p1 (i.e., P0<p1), increasing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is increased to the first preset pressure; if the evaporation pressure p0 is greater than the first preset pressure (i.e., P0>p1), reducing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is reduced to the first pressure.

[0073] In some embodiments, when the third functional part includes the pressure sensor 700 and the first temperature sensor 800, it can be determined whether the evaporator 401 has a need to suppress frosting based on the first temperature of the surface of the evaporator 401 provided by the first temperature sensor 800; or it can be determined whether the evaporator 401 has a need to suppress frosting based on the evaporation pressure at the outlet of the evaporator 401 provided by the pressure sensor 700. The specific implementation method can be the same or similar to the above embodiment, and will not be repeated here.

[0074] In some embodiments, when the third functional part includes a pressure sensor 700 and a first temperature sensor 800, when executing the frosting suppression strategy, the evaporation pressure at the outlet of the evaporator provided by the pressure sensor 700 can be obtained. When it is determined that the evaporator 401 has a frosting suppression requirement, the on-off control valve 500 is controlled to open, and the opening of the pressure regulating valve 600 is adjusted, so as to control the evaporation pressure at the outlet of the evaporator 401 to be adjusted to the first preset pressure. The specific adjustment method of the pressure regulating valve 600 may include: obtaining the evaporation pressure P0 at the outlet of the evaporator provided by the pressure sensor 700; if the evaporation pressure P0 is less than the first preset pressure p1 (i.e., P0<p1), increasing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is increased to the first preset pressure; if the evaporation pressure p0 is greater than the first preset pressure (i.e., P0>p1), reducing the opening of the pressure regulating valve 600 until the evaporation pressure at the outlet of the evaporator 401 is reduced to the first preset pressure.

[0075] In some embodiments, the third functional part may further include a second temperature sensor, which may be disposed at the air side inlet position of the evaporator 401, that is, the second temperature sensor may be disposed at the air inlet position of the evaporator 401, for detecting the return air temperature of the evaporator 401;

[0076] Among them, after adjusting the opening degree of the pressure regulating valve 600 to control the evaporation pressure at the outlet of the evaporator 401 to be adjusted to the first preset pressure, if it is determined that the return air temperature exceeds the working range for suppressing frosting, the on-off control valve 500 and the pressure regulating valve 600 are closed, and the frosting suppression process ends.

[0077] In some embodiments, the third functional part further includes: a frosting suppression indicator light (or defrosting suppression indicator light), which is used to light up when it is determined that the evaporator 401 has a frosting suppression requirement, and goes out after it is determined that the frosting suppression process ends.

[0078] In some embodiments, the third functional part further includes: a dehumidification indicator light, which is used to light up when it is determined that the evaporator 401 has a dehumidification requirement, and goes out after it is determined that the return air temperature is less than the minimum temperature of the first temperature range (for example, the range of 0 to 10 °C), that is, after it is determined that the dehumidification process ends.

[0079] The following uses specific embodiments to elaborate in detail on the dehumidification function and frosting suppression function provided by the refrigeration system provided in this application.

[0080] When the ambient temperature enters the first temperature range (for example, the range of 0 to 10 °C), the evaporation temperature is already lower than 0 °C, and the basic conditions for generating condensed water and freezing are met. The air dew point temperature > the evaporator surface temperature > 0 °C, and condensed water continuously condenses on the evaporator surface but does not frost, so continuous and stable dehumidification can be achieved. In particular, by appropriately adjusting the value of the preset parameter p1, the evaporation pressure can be prevented from being too low, the dew point temperature in the cold storage can be maintained not lower than the temperature value associated with the preset parameter p1, excessive dehumidification can be avoided, and the dry consumption of goods can be reduced.

[0081] By activating the dehumidification function through the controller, if the return air temperature t of the evaporator 401 is ≥ 10 °C, the dehumidification indicator light flashes to indicate that dehumidification has not started yet; when the return air temperature t of the evaporator satisfies 10 °C > t > 0 °C, the dehumidification indicator light is always on to indicate entering the dehumidification state, and the on-off control valve 500 is opened; after the on-off control valve 500 is opened, the pressure sensor reading p is compared with the preset dehumidification parameter p1. If p < p1, the opening degree of the pressure regulating valve 600 is increased. If p > p1, the opening degree of the pressure regulating valve 600 is decreased. If p = p1, the current opening degree of the pressure regulating valve 600 is maintained; when the return air temperature t of the evaporator satisfies t ≤ 0 °C, the dehumidification indicator light is turned off, indicating that dehumidification has been completed or the current conditions do not meet the requirements for entering dehumidification.

[0082] Activate the dehumidification and frost inhibition functions through the controller. If the return air temperature of the evaporator 401 is such that the dehumidification indicator light flashes, it indicates that dehumidification has not started yet; when the return air temperature t of the evaporator satisfies 10°C > t > 0°C, the dehumidification indicator light is constantly on, indicating entry into the dehumidification state, and the on-off control valve 500 is opened; after the on-off control valve 500 is opened, compare the reading p of the pressure sensor with the preset dehumidification parameter p1. If p < p1, increase the opening degree of the pressure regulating valve 600. If p > p1, decrease the opening degree of the pressure regulating valve 600. If p = p1, maintain the current opening degree of the pressure regulating valve 600; when the return air temperature t of the evaporator satisfies t ≤ 0°C, turn off the dehumidification indicator light, indicating that dehumidification has been completed or the current conditions do not meet the requirements for dehumidification and frost inhibition entry.

[0083] The embodiment of the present application also provides a refrigeration adjustment method, which may include the following steps:

[0084] S101: When it is determined that the evaporator of the refrigeration system has a frost inhibition requirement, control the on-off control valve of the refrigeration system to open, and adjust the opening degree of the pressure regulating valve of the refrigeration system to adjust the evaporation pressure at the evaporator outlet to the first preset pressure; wherein, after the on-off control valve is opened and the opening degree of the pressure regulating valve of the refrigeration system is adjusted, control the compressor of the refrigeration system to output part of the refrigerant to the evaporator to inhibit the evaporator from frosting.

[0085] In some embodiments, the method may further include the following steps:

[0086] S102: When it is determined that the evaporator has a dehumidification requirement, control the on-off control valve to open, and adjust the opening degree of the pressure regulating valve to adjust the evaporation pressure at the evaporator outlet to the second preset pressure.

[0087] It should be noted that the specific implementation manners of S101 and S012 provided in the refrigeration adjustment method provided in the embodiment of the present application may be the same as or similar to the implementation manners of the frost inhibition treatment and dehumidification treatment in the above refrigeration system, and will not be elaborated here.

[0088] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated here.

[0089] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0090] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0091] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0092] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (Processor) to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0093] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A refrigeration system, characterized in that: The system comprises: The first functional part is used to provide a refrigeration function; A second functional part, used to cooperate with the first functional part to provide a frost suppression function; The first functional part includes a compressor, a condensing component, a throttle valve, and an evaporating component which are sequentially connected to form a circulation loop, the condensing component includes a condenser, and the evaporating component includes an evaporator; The second functional part comprises an on-off control valve and a pressure regulating valve, wherein the inlet of the on-off control valve is connected between the outlet of the compressor and the inlet of the condenser, the outlet of the on-off control valve is connected to the inlet of the pressure regulating valve, and the outlet of the pressure regulating valve is connected between the outlet of the throttle valve and the inlet of the evaporator; When it is determined that the evaporator has a requirement for suppressing frosting, the on-off control valve is controlled to open, and the opening of the pressure regulating valve is adjusted to adjust the evaporation pressure at the evaporator outlet to a first preset pressure.

2. The system according to claim 1, characterized in that The determining that the evaporator has a requirement for suppressing frost formation comprises: Acquiring a first temperature of the surface of the evaporator provided by an external device, and when it is determined that the first temperature is less than a frosting temperature, determining that the evaporator has a need to suppress frosting; or The evaporation pressure at the evaporator outlet provided by an external device is obtained, and when it is determined that the evaporation pressure is inconsistent with the first preset pressure, it is determined that the evaporator has a requirement to suppress frost.

3. The system according to claim 2, characterized in that The step of adjusting the opening of the pressure regulating valve to adjust the evaporation pressure at the evaporator outlet to a first preset pressure includes: Obtaining the evaporation pressure at the evaporator outlet provided by an external device; If the evaporation pressure is lower than the first preset pressure, increasing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet rises to the first preset pressure; If the evaporation pressure is greater than the first preset pressure, the opening of the pressure regulating valve is reduced until the evaporation pressure at the evaporator outlet drops to the first preset pressure.

4. The system according to claim 1, characterized in that When it is determined that the evaporator has a dehumidification demand, the on-off control valve is controlled to open, and the opening of the pressure regulating valve is adjusted to adjust the evaporation pressure at the evaporator outlet to a second preset pressure.

5. The system according to claim 4, characterized in that The step of adjusting the opening of the pressure regulating valve to adjust the evaporation pressure at the evaporator outlet to a second preset pressure includes: Obtaining the evaporation pressure at the evaporator outlet provided by an external device; If the evaporation pressure is lower than the second preset pressure, increasing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet rises to the second preset pressure; If the evaporation pressure is greater than the second preset pressure, the opening of the pressure regulating valve is reduced until the evaporation pressure at the evaporator outlet drops to the second preset pressure.

6. The system according to claim 1 or 4, characterized in that: When it is determined that the evaporator has a dehumidification demand and a frost suppression demand, the on-off control valve is controlled to open, and the opening of the pressure regulating valve is adjusted to control the evaporation pressure at the evaporator outlet to be within a preset pressure range.

7. The system according to claim 4, characterized in that The adjusting the opening of the pressure regulating valve to control the evaporation pressure at the evaporator outlet to be within a preset pressure range includes: Obtaining the evaporation pressure at the evaporator outlet provided by an external device; If the evaporation pressure is less than the minimum value of the preset pressure range, increasing the opening of the pressure regulating valve until the evaporation pressure at the evaporator outlet is within the preset pressure range; If the evaporation pressure is greater than the maximum value of the preset pressure range, the opening of the pressure regulating valve is reduced until the evaporation pressure at the evaporator outlet is within the preset pressure range.

8. The system according to claim 6, characterized in that The refrigeration system further includes a third functional part; The third functional part includes a first temperature sensor and a pressure sensor. The first temperature sensor is arranged adjacent to the evaporator and is used to detect a first temperature of the evaporator surface. The pressure sensor is arranged at the outlet position of the evaporator and is used to detect the evaporation pressure at the evaporator outlet.

9. The system according to claim 8, characterized in that The third functional part also includes: A second temperature sensor is arranged at the air inlet of the evaporator and is used to detect the return air temperature of the evaporator; Wherein, in the process of adjusting the opening of the pressure regulating valve to suppress frosting, after the evaporation pressure at the outlet of the evaporator is adjusted to the first preset pressure, if it is determined that the return air temperature exceeds the working range of suppressing frosting, the on-off control valve and the pressure regulating valve are closed to end the frost suppression process; During the dehumidification process by adjusting the opening of the pressure regulating valve, after the evaporation pressure at the evaporator outlet is adjusted to the second preset pressure, if it is determined that the return air temperature exceeds the dehumidification working range, the on-off control valve and the pressure regulating valve are closed to end the dehumidification process.

10. The system according to claim 9, characterized in that The third functional part also includes: A frost suppression indicator light, which is used to light up when it is determined that the evaporator has a frost suppression requirement, and to go out after it is determined that the frost suppression process is finished; The dehumidification indicator light is used to light up when it is determined that the evaporator has a dehumidification demand, and to go out after it is determined that the dehumidification process is completed.

11. A refrigeration regulation method, characterized in that: Applied to a refrigeration system, the method comprises: When it is determined that the evaporator of the refrigeration system has a requirement for suppressing frosting, controlling the on-off control valve of the refrigeration system to open, and adjusting the opening of the pressure regulating valve of the refrigeration system to adjust the evaporation pressure at the evaporator outlet to a first preset pressure; Wherein, after the on-off control valve is opened and adjusts the opening of the pressure regulating valve of the refrigeration system, the compressor of the refrigeration system is controlled to output part of the refrigerant to the evaporator to suppress frosting of the evaporator.

12. The method according to claim 11, characterized in that The method further comprises: When it is determined that the evaporator has a dehumidification demand, the on-off control valve is controlled to open, and the opening of the pressure regulating valve is adjusted to adjust the evaporation pressure at the evaporator outlet to a second preset pressure.

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